CN109643933A

CN109643933A - Motor unit

Info

Publication number: CN109643933A
Application number: CN201780049239.XA
Authority: CN
Inventors: 石川勇树; 山口康夫; 右田贵之
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2016-08-09
Filing date: 2017-08-07
Publication date: 2019-04-16
Anticipated expiration: 2037-08-07
Also published as: CN109643933B; JPWO2018030348A1; DE112017003976T5

Abstract

The present invention provides a kind of motor unit, includes motor, has the rotor pivoted about with motor axis；Deceleration device is connect with motor, has the intermediate gear pivoted about with medial axis；Differential gear is connect with deceleration device, has the ring gear pivoted about with differential axis；Shell is provided with the storage space of storage motor, deceleration device and differential gear；Oil lodges in the region on the downside of the vertical direction of storage space；And oil circuit, regional guidance on the downside of its vertical direction from storage space is oily and supplies oil to motor, shell has the top positioned at the surface of deceleration device and differential gear, at least part of ring gear is located at the position of the liquid level of the oil in the region on the downside of the vertical direction than lodging in storage space on the lower, motor axis, medial axis and differential axis are extended parallel to each other along horizontal direction, medial axis and differential axis are located at downside relative to motor axis, when along the end on observation of motor axis, top and the imaginary line for hypothetically linking motor axis and differential axis are substantially parallel.

Description

Motor unit

Technical field

The present invention relates to motor units.

Background technique

Patent Document 1 discloses a kind of motors, are promoted the oil lodged in gear-box using the rotation of gear And the oil is directed into the flow path inside axis.

Existing technical literature

Patent document

Patent document 1: No. 3570450 bulletins of Japanese Patent Publication No.

Summary of the invention

Problems to be solved by the invention

In previous construction, it is possible to which the oil promoted by gear does not supply to the gear of each axis and makes based on each gear Rotation efficiency reduces.

One embodiment of the present invention in view of the above problems, one of its goals is to provide oil can be effectively supplied to The motor unit of the flank of tooth of the gear of each axis.

Means for solving the problems

One mode of motor unit of the invention includes motor, with what is pivoted about with motor axis Rotor；Deceleration device is connect with the motor, has the intermediate gear pivoted about with medial axis；Differential dress It sets, is connect with the deceleration device, there is the ring gear pivoted about with differential axis；Shell is provided with Store the storage space of the motor, the deceleration device and the differential gear；Oil lodges in the lead of the storage space Region on the downside of vertical direction；And oil circuit, from the vertical direction of the storage space on the downside of regional guidance described in oil and will To the motor, the shell has the top positioned at the surface of the deceleration device and the differential gear for the oil supply Portion, at least part of the ring gear are located at described in the region on the downside of the vertical direction than lodging in the storage space The position of the liquid level of oil on the lower, the motor axis, the medial axis and the differential axis are along horizontal direction phase It mutually extends parallel to, the medial axis and the differential axis are located at downside relative to the motor axis, along the horse Up to axis end on observation when, the top with hypothetically link the imaginary line of the motor axis and the differential axis substantially In parallel.

Invention effect

According to one method of the present invention, the motor list of the flank of tooth for the gear that can be effectively supplied oil to each axis is provided Member.

Detailed description of the invention

Fig. 1 is the schematic diagram of the motor unit of an embodiment.

Fig. 2 is the perspective view of the motor unit of an embodiment.

Fig. 3 is the side view of the motor unit of an embodiment.

Fig. 4 is the cross-sectional view along the motor unit of the IV-IV line of Fig. 3.

Fig. 5 is the cross-sectional view of the rotor of an embodiment.

Fig. 6 is the top view of end plate.

Fig. 7 is the cross-sectional view along the end plate of the VII-VII line of Fig. 6.

Fig. 8 is the cross-sectional view of the end plate of the 1st variation.

Fig. 9 is the top view of the end plate of the 2nd variation.

Figure 10 is the cross-sectional view of the motor unit of an embodiment, is the figure for showing the 2nd oil circuit.

Figure 11 is the perspective view that the motor unit of an embodiment of a part of shell is omitted.

Figure 12 is the top view of the 2nd liquid storage device an of embodiment.

Figure 13 is the perspective view of the 2nd liquid storage device of variation.

Figure 14 is the cross-sectional view of the motor unit of an embodiment, is the figure for showing the outline of secondary liquid storage device.

Figure 15 is the main view of the interval wall opening an of embodiment.

Figure 16 is the height for showing the liquid level of oil for the downside that motor chamber is lodged in the motor unit of an embodiment The curve graph of degree and the relationship of the area in the 1st region.

Figure 17 is the main view of the interval wall opening of variation.

Figure 18 is to show the downside that motor chamber is lodged in the motor unit for the interval wall opening for being provided with variation The curve graph of the relationship of the area of the height and the 1st region of the liquid level of oil.

Figure 19 is the configuration for showing each gear for the inside for being located at gear chamber in the motor unit of an embodiment Side view.

Figure 20 is the top view for the halting mechanism that can be used in the motor unit of an embodiment.

Figure 21 is the partial sectional view for showing the cutting mechanism of motor unit of variation 1.

Figure 22 is the schematic diagram for showing the state for connecting motor with deceleration device by cutting mechanism.

Figure 23 is the schematic diagram for showing the state for cutting off motor and deceleration device by cutting mechanism.

Specific embodiment

Hereinafter, being illustrated referring to motor of the attached drawing to embodiments of the present invention.In addition, the scope of the present invention is not limited to The following embodiments and the accompanying drawings can be changed arbitrarily within the scope of the technical idea of the present invention.In addition, in the following figures, being It is readily appreciated that each structure, makes scale bar or quantity in each construction etc. different from actual construction sometimes.

In the following description, in the case where based on the vehicle being mounted in motor unit 1 on horizontal road surface Positional relationship is carried out regulation gravity direction and is illustrated.In addition, in the accompanying drawings, suitably showing XYZ coordinate system as three-dimensional straight Angular coordinate system.In XYZ coordinate system, Z-direction indicates vertical direction (i.e. up and down direction), and +Z direction is upside (gravity direction Opposite side), -Z direction be downside (gravity direction).In addition, X-direction is the direction vertical with Z-direction, indicate to carry horse Up to the front-rear direction of the vehicle of unit 1, +X direction is vehicle front, and -X direction is rear of vehicle.It however, it can be, the side+X To for rear of vehicle, -X direction is vehicle front.Y direction is the direction vertical with X-direction and this both sides of Z-direction, is The width direction (left and right directions) of vehicle.

In the following description, as long as no special declaration, by direction (the Z axis side parallel with the motor axis J2 of motor 2 To) referred to as " axial direction ", the radial direction centered on motor axis J2 is referred to as " radial direction ", it will be centered on motor axis J2 Circumferentially, " circumferential direction " is referred to as around the direction of motor axis J2.In addition, in the following description, " vertical view " refers to along axial sight The state examined.But above-mentioned " parallel direction " also includes substantially parallel direction.In addition, above-mentioned " vertical direction " It also include generally perpendicular direction.

Hereinafter, the motor unit (Vidacare corp) 1 of the embodiment illustrated with reference to the accompanying drawings to the present invention carries out Explanation.

Fig. 1 is the schematic diagram of the motor unit 1 of an embodiment.Fig. 2 is the perspective view of motor unit 1.Fig. 3 is motor The side view of unit 1.Fig. 4 is the cross-sectional view along the motor unit 1 of the IV-IV line of Fig. 3.In addition, difference is omitted in Fig. 4 In-built a part of dynamic device 5.

Motor unit 1 is equipped on hybrid vehicle (HEV), plug-in hybrid-power automobile (PHV), electric car (EV) Deng the vehicle using motor as power source, as its power source carry out using.

As shown in Figure 1, motor unit 1 include motor (main motor) 2, deceleration device 4, differential gear 5, shell 6, oil O with And oily O is supplied to the oil circuit 90 of motor 2.In addition, motor unit 1 can have parking machine as shown in imaginary line in Fig. 2 Structure 7.

As shown in Figure 1, motor 2 includes rotor 20, revolved centered on horizontally extending motor axis J2 Turn；And stator 30, it is located at the radial outside of rotor 20.Deceleration device 4 is connect with the rotor 20 of motor 2.Differential gear 5 passes through It is connect by deceleration device 4 with motor 2.Shell 6 be internally provided with to motor 2, deceleration device 4 and differential gear 5 into The storage space 80 of row storage.Oily O is used for the lubrication of deceleration device 4 and differential gear 5, and is used for the cooling of motor 2.Oily O Lodge in the region on the downside of the vertical direction of storage space 80.Oily O plays the function of lubricating oil and cooling oil, therefore it is preferable to use The automatic transmission low with the viscosity oil same with lubricating oil (ATF:Automatic Transmission Fluid).Oil circuit 90 It is to supply oily O to the path of the oily O of motor 2 from the region of the downside of storage space 80.Oil circuit 90 has the 1st oil circuit 91 and the 2 oil circuits 92.

In addition, in the present specification, " oil circuit " refers to the path of the oily O recycled in storage space 80.Therefore, " oil circuit " Be following concept: not only " flow path " of the flowing of the stable oil comprising formation steadily facing one direction, also including will The path that the path (such as liquid storage device) and oil droplet that oil is temporarily detained are fallen.

< shell >

Motor 2, deceleration device 4 and differential gear 5 are accommodated in the storage space 80 for being set to the inside of shell 6. Shell 6 keeps motor 2, deceleration device 4 and differential gear 5 in storage space 80.Shell 6 has spaced walls 61c. The storage space 80 of shell 6 is divided into motor chamber 81 and gear chamber 82 by spaced walls 61c.Motor 2 is accommodated in motor chamber 81. Deceleration device 4 and differential gear 5 are accommodated in gear chamber 82.

The store oil portion P for accumulating oil O is provided in the region of the downside of storage space 80.In the present embodiment, motor chamber 81 bottom 81a is located at the position more upper than the bottom 82a of gear chamber 82.In addition, to motor chamber 81 and gear chamber 82 into The region of the downside for the spaced walls 61c that row divides is provided with interval wall opening 68.Wall opening 68 is spaced by motor chamber 81 and gear Room 82 is connected to.It is spaced wall opening 68 and the oily O in the region for lodging in the downside of motor chamber 81 is moved to gear chamber 82.Therefore, exist In present embodiment, store oil portion P is set to the region of the downside of gear chamber 82.

A part of differential gear 5 is immersed in store oil portion P.Lodge in movement of the oily O due to differential gear 5 of store oil portion P And be elevated, a part supply diffuses to a part in gear chamber 82 to the 1st oil circuit 91.Diffuse to the oily O quilt of gear chamber 82 It supplies to each gear of deceleration device 4 and differential gear 5 in gear chamber 82 and makes oily O throughout the flank of tooth to gear.For subtracting The oily O of speed variator 4 and differential gear 5 drips and is recycled to the store oil portion P positioned at the downside of gear chamber 82.The storage of storage space 80 The capacity of oily portion P is set to a part of the bearing of differential gear 5 in the stopping of motor unit 1 and immerses to the degree of oily O.

Shell 6 is, for example, die casting aluminum.The outline border of the composition motor unit 1 of shell 6.Shell 6 includes motor incorporating section 61, gear incorporating section 62 and closure 63.Gear incorporating section 62 is located at the left side of motor incorporating section 61.Closure 63 is located at horse Up to the right side of incorporating section 61.

Motor incorporating section 61 includes the peripheral wall portion 61a of tubular, surrounds motor 2 from radial outside；And side plate 61b, Its axial side for being located at peripheral wall portion 61a.The space of the inside of peripheral wall portion 61a constitutes motor chamber 81.Side plate 61b has interval Wall 61c and projecting plate portion 61d.Spaced walls 61c covers the opening of the axial side of peripheral wall portion 61a.On spaced walls 61c, in addition to Other than above-mentioned interval wall opening 68, the axis 21 being additionally provided with for motor 2 runs through insertion hole 61f through insertion.Side plate 61b With spaced walls 61c and relative to peripheral wall portion 61a to radial outside projecting plate portion 61d outstanding.It is arranged on projecting plate portion 61d There is the 1st axle through hole 61e passed through for the drive shaft (illustration omitted) for supporting wheel.

Closure 63 is fixed on motor incorporating section 61.Closure 63 seals the opening of the axially opposite side of peripheral wall portion 61a. That is, closure 63 seals the opening of the motor incorporating section 61 of tubular.Closure 63 has closure main body 63a and cover 63b. Closure main body 63a has the protruding portion 63d of tubular, and the storage of protruding portion 63d to the inside for being located at motor incorporating section 61 is empty Between it is 80 prominent.Protruding portion 63d extends along the inner peripheral surface of peripheral wall portion 61a.In addition, being provided on closure main body 63a along axis To the window portion 63c of perforation.Cover 63b seals window portion 63c from the outside of storage space 80.

The side plate 61b of motor incorporating section 61 is fixed in gear incorporating section 62.Gear incorporating section 62 has to side plate 61b The concave shape of side opening.The opening of gear incorporating section 62 is covered by side plate 61b.Between gear incorporating section 62 and side plate 61b Space constitute the gear chamber 82 stored to deceleration device 4 and differential gear 5.Gear incorporating section 62 is provided with the 2nd vehicle Axis through hole 62e.When along end on observation, the 2nd axle through hole 62e is Chong Die with the 1st axle through hole 61e.

As shown in figure 3, gear incorporating section 62 has the 1st liquid storage device (Reservoir) 93 and axis supply line 94.1st storage Liquid device 93 is located at the face for being axially directed 82 side of gear chamber of gear incorporating section 62, axially extends.1st liquid storage device 93 receives The oily O promoted by differential gear 5.Axis 21 of the axis supply line 94 from the bottom of the 1st liquid storage device 93 towards motor 2 extends.Axis supplies It is to supply the oily O received in the 1st liquid storage device 93 to the flow path of the inside of the hollow portion 22 of axis 21 to flow path 94.

< deceleration device >

As shown in figure 4, the torsion that deceleration device 4 has the revolving speed for reducing motor 2, exported according to reduction ratio increase from motor 2 The function of square.The torque exported from motor 2 is transferred to differential gear 5 by deceleration device 4.

Deceleration device 4 includes the 42, the 3rd gear of the 1st gear (idler drive gear) the 41, the 2nd gear (intermediate gear) (eventually Transmission driving gear) 43 and jackshaft 45.Axis 21,1st gear 41,2nd tooth of the torque exported from motor 2 via motor 2 Wheel 42, jackshaft 45 and the 3rd gear 43 and the ring gear (gear) 51 for being transferred to differential gear 5.The gear ratio of each gear It can be made various changes according to required reduction ratio with the number of gear etc..Deceleration device 4 be the central spindle of each gear in parallel The speed reducer of the parallel-axes gears type of configuration.

1st gear 41 is set to the outer peripheral surface of the axis 21 of motor 2.1st gear 41 is with motor axis J2 together with axis 21 Center is rotated.

Jackshaft 45 extends along the medial axis J4 parallel with motor axis J2.Jackshaft 45 is to be with medial axis J4 The cylindrical shape at center.Jackshaft 45 is pivoted about with medial axis J4.Jackshaft 45 is by a pair of of jackshaft holding shaft 87 are held to rotatably support.A pair of of jackshaft keep the side in bearing 87 be held in spaced walls 61c towards gear chamber 82 The face of side.A pair of of jackshaft keeps another party in bearing 87 to be held in gear incorporating section 62.

2nd gear 42 and the 3rd gear 43 are set to the outer peripheral surface of jackshaft 45.2nd gear 42 and the 3rd gear 43 are in Between axis 45 and connect.2nd gear 42 and the 3rd gear 43 are pivoted about with medial axis J4.2nd gear 42 and the 1st tooth 41 engagement of wheel.3rd gear 43 is engaged with the ring gear 51 of differential gear 5.Between 3rd gear 43 is located at relative to the 2nd gear 42 The next door side 61c.In the present embodiment, jackshaft 45 and the 3rd gear 43 are single components.

< differential gear >

Differential gear 5 is the device for the torque exported from motor 2 to be transferred to the wheel of vehicle.Differential gear 5 has There is following function: in Ackermann steer angle, absorbing the speed difference of the wheel of left and right, and phase is transmitted to the axle of left and right two-wheeled 55 Same torque.Differential gear 5, which includes ring gear 51, gear housing 57, a pair of pinion gear (not shown), pinion shaft, (does not scheme Show) and a pair of of axle shaft gear (not shown).

Ring gear 51 is pivoted about with the differential axis J5 parallel with motor axis J2.It is exported from motor 2 Torque is transferred to ring gear 51 via deceleration device 4.That is, ring gear 51 is connect via other gears with motor 2.Ring Shape gear 51 is fixed on the periphery of gear housing 57.

57 pairs of gear housing a pair of of pinion gears and a pair of of axle shaft gear are stored.When to the transmitting torque of ring gear 51 When, gear housing 57 is rotated around differential axis J5 together with ring gear 51.

A pair of of pinion gear is opposed facing bevel gear.A pair of of pinion gear is supported on pinion shaft.

A pair of of axle shaft gear is the bevel gear at right angles engaged with a pair of of pinion gear.A pair of of axle shaft gear is respectively provided with chimeric Portion.Being fitted into respectively in fitting portion has axle.A pair of of axle to mutually different fitting portion is fitted into according to identical torque around difference Shaft line J5 rotation.

< motor >

As shown in figure 4, motor 2 is inner-rotor type motor, stator 30 is included；And rotor 20, rotatably freely match It is placed in the inside of stator 30.Rotor 20 is rotated and the battery from illustration omitted is supplied electric power to stator 30.Motor 2 Torque is transferred to differential gear 5 via deceleration device 4.

(stator)

Stator 30 includes stator core 32, coil 31 and the insulating part being clipped between stator core 32 and coil 31 and (saves Sketch map shows).Stator 30 is held in shell 6.

Stator core 32 has multiple magnetic pole tooths (illustration omitted) towards radially inner side from the inner circumferential of circular yoke.At this In the stator core 32 of embodiment, the slot number being formed between magnetic pole tooth and magnetic pole tooth is 48.In the spaced winding hanging wire of magnetic pole tooth Astragal and constitute coil 31.

Coil 31 has the axial end face end turn 31a outstanding from stator core 32.That is, stator 30 has coil-end Portion 31a.End turn 31a is axially protruded than the end of the rotor core 24 of rotor 20.End turn 31a is relative to rotor iron Two sides are prominent in the axial direction for core 24.

(rotor)

Rotor 20 include axis (motor drive shaft) 21, rotor core 24, rotor magnet (permanent magnet) 25, a pair of plate-shaped end Plate 26, nut 29 and washer (cover) 28.

(axis)

Axis 21 is in the horizontal direction and along the width direction of vehicle (direction vertical with the direction of travel of vehicle) extension Extend centered on motor axis J2.Axis 21 has interconnected on the same axis the 1st axle portion 21A and the 2nd axle portion 21B.

Axis 21 is to be internally provided with the hollow shaft with the hollow portion 22 along the motor axis J2 inner peripheral surface extended.In Empty portion 22 includes: the 1st hollow portion 22A positioned at the inside of the 1st axle portion 21A；And in the 2nd of the inside of the 2nd axle portion 21B Empty portion 22B.1st hollow portion 22A and the 2nd hollow portion 22B are axially arranged, and are interconnected.

1st axle portion 21A is configured at the motor chamber 81 of storage space 80.1st axle portion 21A is located at the radially inner side of stator 30, Rotor core 24 is penetrated through along motor axis J2.1st axle portion 21A includes the 1st end positioned at outlet side (i.e. 4 side of deceleration device) Portion 21e；And the 2nd end 21f positioned at its opposite side.

1st axle portion 21A is rotatably supported by a pair of 1st bearing 89.A pair of 1st bearing 89 to the 1st axle portion 21A the 1 end 21e and the 2nd end 21f are supported.A side in a pair of 1st bearing 89 is held in closure 63.A pair of 1st bearing Another party in 89 is held in the face towards 81 side of motor chamber of spaced walls 61c.

Fig. 5 is the cross-sectional view of rotor 20.In addition, the 2nd axle portion 21B is illustrated by imaginary line in Fig. 5.

1st axle portion 21A is provided with a pair of of intercommunicating pore 23.Intercommunicating pore 23 radially extend and by the outside of axis 21 with it is hollow Portion 22 is connected to.That is, being provided with a pair of of intercommunicating pore 23 in axis 21.A pair of of intercommunicating pore 23 axially arranges.In addition, in this specification In, the hole of outer peripheral surface is reached as an intercommunicating pore 23 using from the outer peripheral surface of axis 21 by hollow portion.

Flange part (cover) 21c and threaded portion 21d axially arranged is provided in the outer peripheral surface of the 1st axle portion 21A. That is, the outer peripheral surface in axis 21 is provided with flange part 21c and threaded portion 21d.Rotor core 24 be presented axially in flange part 21c with Between the 21d of threaded portion.In threaded portion, 21d is fastened with nut 29.

As shown in figure 4, the 2nd axle portion 21B and the 1st axle portion 21A is located on coaxial.2nd axle portion 21b, which has, is located at the 1st axle portion 3rd end 21g of the side 21A and the 4th end 21h positioned at its opposite side.2nd axle portion 21B is in the 3rd end 21g and the 1st axle portion The 1st end 21e connection of 21A.

2nd axle portion 21B is configured at the gear chamber 82 of storage space 80.The 3rd end 21g of 2nd axle portion 21B is via being set to Spaced walls 61c's is prominent to connect with the 1st axle portion 21A to 81 side of motor chamber through insertion hole 61f.The 2nd axle portion 21B's Outer peripheral surface is provided with the 1st gear 41.1st gear 41 is a part of deceleration device 4.1st gear 41 is engaged with the 2nd gear 42, The output of axis 21 is transferred to the 2nd gear.

2nd axle portion 21B is rotatably supported by a pair of 2nd bearing 88.Between a side in a pair of 2nd bearing 88 is held in The face towards 82 side of gear chamber of next door 61c.Another party in a pair of 2nd bearing 88 is held in gear incorporating section 62.

Hollow portion 22 the 2nd end 21f and the 2nd axle portion 21B of the 1st axle portion 21A the 4th end 21h along axially open.From The opening of 4th end 21h supplies oily O to hollow portion 22.Supply is to the oily O of hollow portion 22 from the 4th end side 21h towards the 2nd The flowing of the end side 21f.It supplies to the oily O of hollow portion 22 and flows out to via intercommunicating pore 23 outside of axis 21.

In addition, in the following description, the 4th end side 21h is known as to the flow direction upstream side of hollow portion 22 sometimes, it will The 2nd end side 21f is known as the flow direction downstream side of hollow portion 22.

As shown in figure 5, the 1st hollow portion 22A has different the 1st region 22p of diameter of inner peripheral surface, the 2nd region (in path Empty portion) 22q and the 3rd region (major diameter hollow portion) 22r.The inner circumferential of 1st region 22p, the 2nd region 22q and the 3rd region 22r The diameter in face is sequentially increased.That is, the internal diameter of the 2nd region 22q is greater than the 1st region 22p, the internal diameter of the 3rd region 22r is greater than the 1st area Domain 22p and the 3rd region 22r.1st region 22p, the 2nd region 22q and the 3rd region 22r are from flow direction downstream side towards upstream Side is arranged successively.1st region 22p is located at the 2nd end side 21f.2nd region 22q is presented axially in the 1st region 22p and the 3rd area Between the 22r of domain.3rd region 22r is located at the 1st end side 21e.That is, the 3rd region 22r, which is located at, leans on the 2nd axle portion than the 2nd region 22q The position of the side 21B.

One intercommunicating pore 23 of the flow direction upstream side in a pair of of intercommunicating pore 23 is open in the 3rd region 22r.In addition, one It is open to another intercommunicating pore 23 in the flow direction downstream side in intercommunicating pore 23 in the 2nd region 22q.

In addition, the inner peripheral surface of the 1st hollow portion 22A has the 1st step between the 1st region 22p and the 2nd region 22q Face 22s and the 2nd step surface (step surface) 22t between the 2nd region 22q and the 3rd region 22r.1st step surface 22s and 2nd the 2nd side axle portion 21B of step surface 22t direction.In addition, the 1st step surface 22s and the 2nd step surface 22t is with towards radial outside And it is tilted towards flow direction upstream side.

The 3rd end 21g of 2nd axle portion 21B is inserted into the 3rd region 22r of the 1st axle portion 21A.It is provided in the 3rd region 22r Internal spline 22e.On the other hand, the outer peripheral surface of the 3rd end 21g of the 2nd axle portion 21B is provided with external splines 22g.Internal spline 22e It is mutually chimeric with external splines 22g.1st axle portion 21A and the 2nd axle portion 21B connection as a result,.

End face (the i.e., end face of the 3rd end 21g) and the 2nd step surface in the 1st side axle portion 21A of direction of the 2nd axle portion 21B Gap is provided between 22t.The inner peripheral surface of gap between the end face and the 2nd step surface 22t of 3rd end 21g in hollow portion 22 Constitute groove 22u.That is, the inner peripheral surface in hollow portion 22 is provided with the groove 22u circumferentially extended, groove 22u is by the 2nd axle portion The end face of the 3rd end 21g, the inner peripheral surface of the 3rd region 22r and the 2nd step surface 22t of 21B is constituted.

One intercommunicating pore 23 of the flow direction upstream side positioned at oil O in a pair of of intercommunicating pore 23 is in groove 22u in Empty portion 22 is open.Centrifugal force is assigned to the oily O being provided in hollow portion 22 with the rotation of axis 21.In the inner circumferential of hollow portion 22 Fluted 22u is arranged in face, therefore lodges in oily O in groove 22u with centrifugal force.According to the present embodiment, intercommunicating pore 23 It is open, therefore can effectively guide the oily O lodged in groove 22u to intercommunicating pore 23 in groove 22u.

According to the present embodiment, the gap of the coupling part of the 1st axle portion 21A and the 2nd axle portion 21B can be used as groove 22u and accumulate oily O.It is therefore not necessary to implement special processing in order to which the groove 22u of accumulation oil O is arranged.

In the case where being provided with multiple intercommunicating pores 23 axially arranged, oil O is easy to flow to positioned at oil O's sometimes The intercommunicating pore 23 in flow direction downstream side, and the oily O for flowing into the intercommunicating pore 23 of the flow direction upstream side of oily O is insufficient.According to Present embodiment, the intercommunicating pore 23 positioned at flow direction upstream side can be such that oily O fully flows in groove 22u split shed Enter to the intercommunicating pore 23 for being located at flow direction upstream side.

According to the present embodiment, the diameter of hollow portion 22 is with from flow direction upstream side towards downstream side and periodically Become smaller.It is easy to make oily O from the upstream side of hollow portion 22 throughout to downstream side as a result,.In addition, the upstream side in a pair of of intercommunicating pore 23 3 region 22r of Fang opening, the another party in downstream side is open in the 2nd region 22q.That is, with the intercommunicating pore 23 of upstream side Opening is compared, and the opening of the intercommunicating pore 23 in downstream side is set to the lesser region of diameter of hollow portion 22.Thus, it is also possible to make oil O is flowed sufficiently into the intercommunicating pore 23 for being located at downstream side.

A part of internal spline 22e is located at the gap between the end face and the 2nd step surface 22t of the 3rd end 21g.Therefore, exist The inner peripheral surface of hollow portion 22 is provided with from internal spline 22e and the protrusion circumferentially arranged and recess portion.In the section of hollow portion Shape is to worry to be rotated even if axis in the circular situation centered on motor axis, and the oily O in hollow portion is also opposite It dallies in axis, centrifugal force can not be assigned to oily O.In contrast, be provided in hollow portion 22 protrusion that circumferentially arranges and Recess portion can assign centrifugal force to the oily O of hollow portion 22 so as to rotate oily O with the rotation of axis 21.As a result, can It is enough successfully to guide oily O to intercommunicating pore 23.

According to the present embodiment, the outer peripheral surface of the 2nd axle portion 21B and the inner peripheral surface of the 3rd region 22r are provided with mutual spline Chimeric spline (external splines 22g and internal spline 22e).In addition, a part of the spline (internal spline 22e) of the 3rd region 22r is located at In groove 22u.Therefore, centrifugal force can be assigned to the oily O in hollow portion 22 using for chimeric internal spline 22e.That is, nothing Concaveconvex shape need to be arranged to the inner peripheral surface of hollow portion 22 implementation processing in order to assign centrifugal force to oily O.

(rotor core)

Rotor core 24 is laminated silicon steel plate and constitutes.Rotor core 24 is the cylindrical body axially extended.Rotor Iron core 24 has a pair of of the axial end face 24a for being respectively facing opposite side in axial direction and the outer peripheral surface 24b towards radial outside.

Rotor core 24 is sandwiched into together with a pair of end plate 26 between nut 29 and flange part 21c.In nut 29 and end Washer 28 is accompanied between plate 26.

Rotor core 24 is provided with an embedded hole that is centrally located and axially penetrating through when along end on observation 24c, multiple magnet retaining holes 24d and multiple iron core through hole 24e.Embedded hole 24c, magnet retaining holes 24d and iron core pass through Through-hole 24e is open in a pair of of axial end face 24a.

Embedded hole 24c is the circle centered on motor axis J2.Axis 21, which runs through, to be inserted into embedded hole 24c and is fitted into.Cause This, rotor core 24 surrounds axis 21 from radial outside.The chimeric of axis 21 and embedded hole 24c are movable fits.Therefore, can inhibit by In the deformation for being fitted into caused rotor core 24 of axis 21.It is provided in the inner peripheral surface of embedded hole 24c prominent to radially inner side Protrusion (illustration omitted).The protrusion is embedded in the keyway (illustration omitted) for being set to the outer peripheral surface of axis 21.It can inhibit and turn as a result, The opposite rotation of sub- iron core 24 and axis 21.

Multiple iron core through hole 24e are configured to circumferentially arrange.Iron core through hole 24e is located at than magnet retaining holes 24d By the position of radially inner side.Iron core through hole 24e plays the role of flowing oily O between a pair of of axial end face 24a.

Multiple magnet retaining holes 24d are configured to circumferentially arrange.Rotor magnet 25 is inserted into magnet retaining holes 24d.Magnetic Iron retaining hole 24d keeps rotor magnet 25.That is, the rotor 20 of present embodiment is embedded in the inside of rotor core 24 There is the baried type magnet (IPM (interior permanent magnet)) of rotor magnet 25.

Rotor magnet 25 is permanent magnet.Multiple rotor magnets 25 are inserted into the multiple magnet circumferentially arranged respectively and keep Hole 24d and be fixed on rotor core 24.Multiple rotor magnets 25 circumferentially arrange.

(end plate)

Fig. 6 is the top view of end plate 26.Fig. 7 is the cross-sectional view along the end plate 26 of the VII-VII line of Fig. 6.In addition, scheming In 6 and Fig. 7, the other component of motor unit 1 is shown by imaginary line.

As shown in fig. 6, end plate 26 is to overlook circle.End plate 26 is metal plate.It is provided with axially in end plate 26 The circular medium pore 26i of perforation.In the inner peripheral surface of medium pore 26i, keyed portion 26q is set.Key portion 26q, which is embedded in, is set to axis 21 keyway 21k.End plate 26 and axis 21 inhibit opposite rotation by the Qian He of key portion 26q and keyway 21k.

As shown in figure 5, end plate 26 has the 1st face 26a and the 2nd face 26b.The axial end face of 1st face 26a and rotor core 24 24a is opposed.The 2nd face 26b direction side opposite with the 1st face 26a.

A pair of end plate 26 is located at the axial sides of rotor core 24.A pair of end plate 26 respectively with rotor core 24 one Axial end face 24a is contacted.A side (the 1st end plate 26A) in a pair of end plate 26 is located at an axial end face of rotor core 24 Between 24a and flange part 21c.Another party (the 2nd end plate 26B) in a pair of end plate 26 is located at another axial direction of rotor core 24 Between end face 24a and washer 28.End plate 26 contacts on the 1st face 26a with axial end face 24a.In addition, end plate 26 is in the 2nd face 26b is upper to be contacted with flange part 21c or washer 28.

According to the present embodiment, rotor core 24 and a pair of end plate 26 are sandwiched between flange part 21c and nut 29.By This, the axial end face 24a pressing by a pair of end plate 26 from axial sides to rotor core 24.End plate 26 the 1st face 26a with turn The contact portion of the axial end face 24a of sub- iron core 24 generates frictional force, and thus, it is possible to inhibit rotor core 24 opposite with axis 21 Rotation.

When by indentation by rotor core and fixed axis, rotor core deforms, the magnetic passed through in rotor core Road changes and increases iron loss.Especially as in the present embodiment, in the motor of vehicle traction, driving force compared with Greatly, it is therefore desirable to which the magnitude of interference for ensuring to be pressed into is larger, is easy to make the iron loss of rotor core to increase.According to the present embodiment, rotor Iron core 24 is fixed on axis 21 across end plate 26.Therefore, can make between the embedded hole 24c and being fitting for of axis 21 of rotor core 24 Gap is chimeric, is able to suppress the deformation of rotor core 24, is capable of providing efficient motor 2.

As shown in fig. 7, being provided with recess portion 26f in the 1st face 26a and surrounding the inclined surface 26e of recess portion 26f from radial outside. Recess portion 26f is the circle centered on motor axis J2 when overlooking.Recess portion 26f has recess portion bottom surface 26g and recess portion inner peripheral surface 26h.Recess portion bottom surface 26g is the plane vertical with motor axis J2.Recess portion inner peripheral surface 26h is located at recess portion bottom surface 26g and inclined surface Between 26e.Recess portion inner peripheral surface 26h is tilted with from radially inner side towards radial outside to the direction for making recess portion 26f shoal.? Gap is provided between recess portion 26f and the axial end face 24a of rotor core 24.Oily O is contained in the gap, thus to rotor The axial end face 24a of iron core 24 is cooled down.

Inclined surface 26e is set to positioned at the region of most radial outside on the 1st face 26a, is circumferentially extended.Inclined surface 26e is rolled tiltedly according to tilt angle theta towards rotor core 24 with towards radial outside.In addition, here, tilt angle theta is Refer to the plane and inclined surface 26e angulation vertical with motor axis J2.

End plate 26 contacts on the inclined surface 26e of the 1st face 26a with the axial end face 24a of rotor core 24.Inclined surface 26e With being rolled tiltedly towards radial outside to rotor core 24, therefore region and axial end of the inclined surface 26e in most radial outside Face 24a contact.Thereby, it is possible to generate frictional force in radial outside as much as possible, which is by inclined surface 26e and axial direction The contact of end face 24a and generate.In addition, the vertical stress of inclined surface 26e and axial end face 24a can be made radial with direction Outside and increase.Thereby, it is possible to increase the boundary value of stiction with towards radial outside.Inhibit end plate 26 and rotor The holding torque of the opposite rotation of iron core 24 is at a distance from away from rotation axis and frictional force is proportional.Therefore, according to this implementation Mode is capable of increasing the holding torque for inhibiting the relative rotation of end plate 26 and rotor core 24, can be secured relative to end plate 26 Ground keeps rotor core 24.In order to play such effect, the tilt angle theta of preferred angled face 26e is 0.1 ° or more 5 ° or less.

In addition, the end plate 26 of present embodiment contacts on the 26e of inclined surface with the axial end face 24a of rotor core 24.Cause This, can be such that the contact position of end plate 26 and rotor core 24 stablizes.Therefore, it is able to suppress the biography of end plate 26 Yu rotor core 24 The deviation of torque delivery can be securely fixed rotor core 24 relative to axis 21.

In addition, according to the present embodiment, inclined surface 26e is provided in end plate 26, thus even if in end plate 26 and rotor iron There are deviations for the flatness of the contact portion of the axial end face 24a of core 24, also can reliably contact.Such as the institute in paragraph below As explanation, in inclined surface, the radially inner side of 26e is provided with oil stream road 26t (referring to Fig. 5).In general, when oil enters to rotor When between iron core and stator, the rotation efficiency of rotor core is reduced.Pass through the axial end face of inclined surface 26e and rotor core 24 24a contact, the oily O for being able to suppress oil stream road 26t enter to the periphery of rotor core 24 between end plate 26 and rotor core 24 Gap between face 24b and stator 30.

In addition, inclined surface 26e is also possible to inclination angle with the structure changed towards radial outside.In addition, inclined surface 26e is also possible to tilt angle with the flexure plane changed towards radial outside.

As shown in figure 5, inclined surface 26e seals the opening of the magnet retaining holes 24d of rotor core 24.It can inhibit guarantor as a result, The rotor magnet 25 for being held in the inside of magnet retaining holes 24d flies out from the opening of magnet retaining holes 24d.Thereby, it is possible to inhibit to turn A part of sub- magnet 25 enters to the drive part in housing recess.

As shown in fig. 7, being provided with the corner portion 26d of planar portions 26c and the outer rim positioned at planar portions 26c in the 2nd face 26b. Planar portions 26c is vertical with motor axis J2.Corner portion 26d is rolled oblique with towards radial outside to the 1st face 26a.

As shown in figure 5, it is recessed that end plate 26 is provided with two groups of plate through hole 26p, the 1st groove (the 1st recess portion) 26j and the 2nd Slot (second recesses) 26k.Hereinafter, to one group of progress in two groups of plate through hole 26p, the 1st groove 26j and the 2nd groove 26k Illustrate, another group also has same structure.

Plate through hole 26p is axially extended.1st groove 26j is located at the 1st face 26a.1st groove 26j is from plate through hole The opening of 26p extends to radially inner side.Inner circumferential of the 1st groove 26j in medium pore 26i is open towards radially inner side.2nd groove 26k is located at the 2nd face 26b.2nd groove 26k extends from the opening of plate through hole 26p to radial outside.2nd groove 26k is in chamfering Portion 26d is open to radial outside.

The opening axially of 1st groove 26j of end plate 26 is covered by the axial end face 24a of rotor core 24.In addition, The radial opening of 1st groove 26j is connect with the intercommunicating pore 23 of axis 21.

The oily O for being provided to the inside of the hollow portion 22 of axis 21 flows to radial outside via intercommunicating pore 23.In addition, oil O from The opening of the radial outside of intercommunicating pore 23 flows into the 1st groove 26j.In addition, oil O flows to the 1st face by plate through hole 26p 26a and the 2nd face side 26b, discharge via the 2nd groove 26k to the outside of rotor 20.As shown in figure 4, the diameter in end plate 26 is outside Side is provided with the end turn 31a of stator 30.Discharge oily O to the outside of rotor 20 be provided to end turn 31a and to coil End 31a is cooled down.

The 1st groove 26j, plate through hole 26p and the 2nd groove 26k of end plate 26 are functioned as oil stream road 26t.That is, Oil stream road 26t is made of the 1st groove 26j, plate through hole 26p and the 2nd groove 26k.A pair of end plate 26 be respectively arranged with Intercommunicating pore 23 be connected to and radially extend and the oil stream road 26t that is open.

End plate 26 according to the present embodiment, plate through hole 26p, the 1st groove 26j and the 2nd groove 26k constitute oil stream road 26t.Therefore, according to the present embodiment, oil stream can be constituted by the cheap component (end plate 26) for being molded and manufacturing Road 26t.

1st groove 26j of a pair of end plate 26 is connected to iron core through hole 24e.That is, iron core through hole 24e is by a pair of end plate 26 respective 1st groove 26j are connected to each other.In other words, iron core through hole 24e by the respective oil stream road 26t of a pair of end plate 26 that This connection.In addition, at least part of the opening of iron core through hole is located at the position for leaning on radial outside than plate through hole 26p.

According to the present embodiment, the 1st groove 26j of a pair of end plate 26 is connected to each other by iron core through hole 24e, therefore can Make to flow to iron core through hole 24e by a part of the oily O of the 1st groove 26j.Pass through the oily O of iron core through hole 24e, energy as a result, It is enough that rotor core 24 is cooled down from inside.In addition, can be across rotor core 24 and to turn for being held in rotor core 24 Sub- magnet 25 is cooled down.

According to the present embodiment, the opening of iron core through hole 24e is located at the plate through hole 26p than a pair of end plate 26 by radial The position in outside.Thereby, it is possible to which oily O to be lodged in the inside of iron core through hole 24e by the centrifugal force of rotor 20, and will be oily O is supplied from iron core through hole 24e to the 1st groove 26j of the end plate 26 of two sides.In addition, when the side in a pair of end plate 26 It, can be via iron core through hole 24e and from the other side for oil supply O in 1st groove 26j in the insufficient situation of oil O.Therefore, can It discharges from each end plate 26 by approximately equal amounts of oil O to end turn 31a, is able to carry out the stable cooling of coil 31.

As shown in figure 5, using the side being sandwiched between flange part 21c and rotor core 24 in a pair of end plate 26 as 1 end plate 26A will be sandwiched into another party between nut 29 and rotor core 24 as the 2nd end plate 26B.

In the 1st end plate 26A, a part of the radially inner side of plate through hole 26p is covered by flange part 21c.In addition, In 1 end plate 26A, the opening integral face axially of the 2nd groove 26k in the axial direction outside.In other words, in the 1st end plate 26A, Along end on observation, the opening axially of the 2nd groove 26k is integrally exposed.That is, the 2nd groove 26k of the 1st end plate 26A along It is connected in axial opening with outside.In the 1st end plate 26A, in the 2nd groove 26k, a part of plate through hole 26p and edge The entirety of axial opening functioned as the 1st opening portion 26s discharged from washer 28.In the 1st end plate 26A, pass through The oily O of plate through hole 26p is discharged from the 1st opening portion 26s.

Washer 28 is accompanied between the 2nd end plate 26B and nut 29.In the 2nd end plate 26B, plate through hole 26p and the 2nd is recessed A part of the radially inner side of the opening axially of slot 26k is covered by washer 28.By the 2nd groove 26k axially The part covered by washer 28 in opening is known as covering portion, will not be known as opening portion by the part that washer 28 covers.That is, In 2 end plate 26B, the opening axially of the 2nd groove 26k has the covering portion covered by washer 28 and not by washer covering 2nd opening portion 26r.The 2nd groove 26k of 2nd end plate 26B is opened the 2nd of the end of the radial outside positioned at the 2nd groove 26k Portion 26r is towards axially external.When in other words, along end on observation, the 2nd groove 26k of the 2nd end plate 26B reveals in the 2nd opening portion 26r Out.That is, the 2nd groove 26k of the 2nd end plate 26B is connected in the 2nd opening portion 26r with outside.2nd opening portion 26r is located at the 2nd groove The end of the radial outside of 26k.In the 2nd end plate 26B, discharged by the oily O of plate through hole 26p from the 2nd opening portion 26r.

The 1st end plate 26A and the 2nd end plate 26B according to the present embodiment are provided with the 2nd groove 26k in the 2nd face 26b, from And the oily O for flowing to the 2nd face side 26b via plate through hole 26p can be made to move along the 2nd groove 26k to radial outside.Cause This, can make oily O steadily flow to the 2nd opening portion 26r, oily O can be stably supplied to the end turn 31a of stator 30.

According to the present embodiment, for the 2nd groove 26k of the 1st end plate 26A and the 2nd end plate 26B, flange part 21c or washer 28 function respectively as the cover for covering axial opening.That is, rotor 20, which has, is located at rotor core across end plate 26 A pair of of cover (flange part 21c and washer 28) of 24 axial end portion.Cover (flange part 21c and washer 28) is from outer side covering plate The opening axially of through hole 26p, to guiding the oily O for flowing to the 2nd face side 26b from plate through hole 26p at along the 2nd Groove 26k flowing.According to the present embodiment, it is able to suppress by the movement that cover (flange part 21c and washer 28) controls oil O Oily O is entered between rotor core 24 and stator 30.

The 2nd end plate 26B according to the present embodiment, the opening axially of the 2nd groove 26k are locally covered by washer 28 Lid, towards axially external in the 2nd opening portion 26r.That is, in the 2nd groove 26k until in the region of the 2nd opening portion 26r, oily O Oily O will not can be made reliably to be moved to the 2nd opening portion 26r along axial spilling.Thereby, it is possible to make oily O from the 2nd opening portion 26r It steadily discharges, oily O can be stably supplied to end turn 31a.

According to the present embodiment, the 2nd groove 26k is in the 2nd opening portion 26r for being located at longitudinal end along axially and towards axial direction Outside.Therefore, can make to disperse from the 2nd opening portion 26r along axial direction by the oily O of the 2nd groove 26k.Thereby, it is possible to make oily O court The end turn 31a axially protruded to the end than rotor core 24 disperses, coil that can effectively to end turn 31a 31 are cooled down.

In addition, in the 1st end plate 26A of present embodiment, in a part and opening axially of plate through hole 26p Be integrally provided with the 1st opening portion 26s.But as shown in imaginary line in Fig. 5, it is also possible to flange part 21c and covers the 2nd groove A part of the opening axially of 26k.In this case, the 1st opening portion 26s and the 2nd end plate 26B of the 1st end plate 26A 2nd opening portion 26r similarly, positioned at the end of radial outside, can play effect same as the 2nd opening portion 26r.

In addition, in the present embodiment, being provided with the 1st groove 26j and the 2nd groove 26k of channel-shaped in end plate 26.But Even if being the recess portion of non-channel-shaped, above-mentioned certain effect can be also played.In addition, the radially extended by setting the 1st Groove 26j and the 2nd groove 26k can successfully guide oil O along radial.

(the 1st variation of end plate)

Fig. 8 is the cross-sectional view of the end plate 126 for the 1st variation that can be used in the present embodiment.In addition, for it is upper The structural element for stating the identical mode of embodiment is illustrated using identical label.

The end plate 126 of 1st variation has 1st face opposed with rotor core 24 in the same manner as above embodiment The 2nd face 126b of 126a and the direction side opposite with the 1st face 126a.In addition, being provided with a pair of of plate through hole in end plate 126 The 2nd groove 126k of 126p, the 1st groove 126j of a pair and a pair.Plate through hole 126p is axially extended.1st groove 126j In the 1st face 126a.1st groove 126j extends from plate through hole 126p to radially inner side.2nd groove 126k is located at the 2nd face 126b. 2nd groove 126k extends from plate through hole 126p to radial outside.The opening partes tegmentalis 128 axially of 2nd groove 126k It locally covers, in opening portion, 126r is towards axially external.In addition, here, cover 128 is washer 28 or flange part 21c (reference Fig. 5).

In this variation, it is provided in the bottom of the 2nd groove 126k so that the depth of the 2nd groove 126k is with towards diameter The inclined surface 126u to shoal outward.When along end on observation, inclined surface 126u is Chong Die with opening portion 126r.According to this deformation Example can assign axial ingredient to the flowing of oily O by the way that inclined surface 126u is arranged in the 2nd groove 126k.It can make the oily edge O The end turn 31a for axially dispersing and axially protruding oily O towards the end than rotor core 24 effectively disperses.

(the 2nd variation of end plate)

Fig. 9 is the top view of the end plate 226 for the 2nd variation that can be used in the present embodiment.In addition, for it is upper The structural element for stating the identical mode of embodiment is illustrated using identical label.

The end plate 226 of 2nd variation has the 1st face 226a and direction and the 1st face 226a in the same manner as above embodiment 2nd face 226b of opposite side.In addition, have on end plate 226 a pair of of plate through hole 226p, the 1st groove 226j of a pair with And the 2nd groove 226k of a pair.Plate through hole 226p is axially extended.1st groove 226j is located at the 1st face 226a.1st groove 226j Extend from plate through hole 226p to radially inner side.2nd groove 226k is located at the 2nd face 226b.2nd groove 226k is from plate through hole 226p extends to radial outside.228 partial mulching of opening partes tegmentalis axially of 2nd groove 226k, in opening portion 226r In towards axially external.In addition, here, cover 228 is washer 28 or flange part 21c (referring to Fig. 5).

2nd groove 226k is the slot radially extended.In addition, along end on observation, the direction of the extension of the 2nd groove 226k Relative to radial skew.In addition, the 2nd groove 226k increases according to towards radial outside relative to the angle of radial skew Mode be bent.According to this modification, the 2nd groove 226k is relative to radial skew, therefore can be from inclined 2nd groove 226k Wall surface assign centrifugal force to by the oily O of the 2nd groove 226k.Thereby, it is possible to improve the speed of the oily O to disperse from opening portion 226r Degree, even if also can reliably make oily O connect with end turn 31a in the farther away situation of distance until end turn 31a Touching.

The shape along end on observation of the 2nd groove 226k of a pair of this variation is mutually different.In the 2nd groove 226k of a pair The a 2nd groove 226kA relative to another the 2nd groove 226kB, be bent when along end on observation small, relative to radial direction Tilt angle it is smaller.That is, according to the present embodiment, when along end on observation, the respective slot of multiple 2nd groove 226kA, 226kB Extension direction it is different relative to radial angle.Therefore, the centrifugal force that the 2nd groove 226kA, 226kB of a pair assigns oily O Size it is mutually different.For from the oily O that a 2nd groove 226kA disperses, disperse from another the 2nd groove 226kB Oily O higher speed, disperse to farther range.That is, according to this modification, it, can in multiple 2nd groove 226kA, 226kB So that oily O is dispersed to mutually different region, the wider range contact of oily O Yu end turn 31a can be made.

< oil circuit >

As shown in Figure 1, oil circuit 90 is located inside, the i.e. storage space 80 of shell 6.Oil circuit 90 is configured to across storage space 80 motor chamber 81 and gear chamber 82.Oil circuit 90 be by oily O from store oil portion P (the i.e., region of the downside of storage space 80) via Motor 2 and the path for importing the oily O of store oil portion P again.Oil circuit 90 has the 1st oil circuit (oil circuit) 91 of the inside by motor 2 With the 2nd oil circuit (oil circuit) 92 of the outside by motor 2.Oily O is in the 1st oil circuit 91 and the 2nd oil circuit 92 from inside and outside right Motor 2 is cooled down.Oil circuit 90 constitutes oil cooling unit structure.

1st oil circuit 91 and the 2nd oil circuit 92 are to supply to motor 2 oily O from store oil portion P and be recycled to store oil portion again The path of P.In the 1st oil circuit 91 and the 2nd oil circuit 92, oily O drips from motor 2 and the region of the downside that lodges in motor chamber.Product The region for the downside that the oily O for being stored in the region of the downside of motor chamber 81 is moved to gear chamber 82 via interval wall opening 68 is (i.e., Store oil portion P).

It is provided in the path of the 1st oil circuit 91 and carries out cooling cooler 97 to oily O.By the 1st oil circuit 91 and cold But the cooling oily O of device 97 collaborates in store oil portion P with by the oily O of the 2nd oil circuit 92.In store oil portion P, pass through the 1st oil circuit 91 It is mutually mixed with the oily O of the 2nd oil circuit 92 and carries out heat exchange.Thus, it is also possible to make to be configured at cold in the path of the 1st oil circuit 91 But the cooling effect of device 97 influences the oily O by the 2nd oil circuit 92.According to the present embodiment, using being set to 91 He of the 1st oil circuit A cooler 97 in an oil circuit in 2nd oil circuit 92 and the oily O in two oil circuits is cooled down.

In general, in the flow path that cooler configuration in liquid stabilising flows.In order to be cooled down to two oil circuits, it is also considered that The structure of cooler is respectively configured in the flow path that two oil circuits are included.In this case, it needs using two coolers, at Originally increase.In addition, in order to cool down two oil circuits considering that the region at two oil circuit interflow is made flow path to be arranged and in the stream The structure of cooler is set in road.In this case, it needs that flow path is arranged in the region of exchange, it is therefore desirable to make the stream in oil circuit Structure is complicated on road changes, as a result, cost increases.

According to the present embodiment, cooler only is set in the 1st oil circuit 91, the oil of the 1st oil circuit 91 and the 2nd oil circuit 92 will be passed through O is mixed in store oil portion P, so as to cool down indirectly to the 2nd oil circuit 92.The flow path in oil circuit 90 is not made as a result, Structure is complicated changes and can be cooled down by a cooler 97 to the oily O of the 1st oil circuit 91 and the 2nd oil circuit 92.

In addition, such effect is cold with carrying out to oily O when the either side in the 1st oil circuit 91 and the 2nd oil circuit 92 But the cooler 97 and oily O flowed in the 1st oil circuit 91 and the 2nd oil circuit 92 can be played in the case where the interflow store oil portion P Effect.

The heat of oily O is mainly radiated by cooler 97.In addition, since oily O is contacted with the inner surface of shell 6, oil O's A part of heat radiates also by shell 6.In addition, as shown in Figure 1, concavo-convex heat dissipation can be set in the lateral surface in shell 6 Device portion 6b.Radiator portion 6b promotes the cooling of the motor 2 via shell 6.

(the 1st oil circuit)

In the 1st oil circuit 91, oily O promotes the inside for being directed into rotor 20 by differential gear 5 from store oil portion P.Turning The inside of son 20 assigns the centrifugal force of the rotation with rotor 20 to oily O.Oil O surrounds rotor 20 towards from radial outside as a result, Stator 30 equably spread and stator 30 cooled down.

1st oil circuit 91 includes and promotes path 91a, axis feed path (oil stream road) 91b, in axis in path 91c and rotor Path 91d.In addition, being provided with the 1st liquid storage device 93 in the path of the 1st oil circuit 91.1st liquid storage device 93 is set to storage space 80 (especially gear chamber 82).

Promoting path 91a is that oily O is promoted simultaneously benefit from store oil portion P by the rotation of the ring gear 51 of differential gear 5 With the path of the 1st liquid storage device 93 (referring to Fig. 3) receiving oil O.

As shown in figure 3, the 1st liquid storage device 93 is located at motor axis J2, medial axis J4 and differential shaft in vertical direction The upside of line J5.1st liquid storage device 93 in vehicle front-rear direction (horizontal direction, X-direction) be located at medial axis J4 with it is differential Between axis J5.1st liquid storage device 93 in vehicle front-rear direction (horizontal direction, X-direction) be located at motor axis J2 with it is differential Between axis J5.1st liquid storage device 93 is configured at the side of the 1st gear 41.The upward side opening of 1st liquid storage device 93.

In the present specification, " liquid storage device " refers to the state in stable liquid flowing not facing one direction The tectosome of the lower function of accumulating oil." liquid storage device " flows on this aspect in unstable liquid, different from " flow path ".In this reality The storage space 80 for applying the motor unit 1 of mode is provided with the 1st liquid storage device 93, the 2nd liquid storage device 98 and secondary liquid storage device 95.

In the present embodiment, the differential axis J5 as the rotation center of ring gear 51 matches relative to deceleration device 4 It is placed in vehicle rear side.Differential gear 5 the opposite side of vehicle advance Shi Yu deceleration device 4 region towards upper sidespin Turn.The 1st liquid storage is fallen on around the side opposite with deceleration device 4 by the oily O that the ring gear 51 of differential gear 5 is promoted The upside of device 93 lodges in the 1st liquid storage device 93.That is, the 1st liquid storage device 93 receives the oily O promoted by ring gear 51.In addition, In the higher situation of liquid level for waiting store oils portion P after the just driving of motor 2, the oily O of the 2nd gear 42 and the 3rd gear 43 and store oil portion P It contacts and promotes oily O.In this case, the 1st liquid storage device 93 in addition to the oily O that receives to be promoted by ring gear 51 with Outside, also receive the oily O promoted by the 2nd gear 42 and the 3rd gear 43.

Shell 6 has (top) 64 at the top of the gear chamber of the wall for the upside for constituting gear chamber 82.64 are located at the top of gear chamber The upside of deceleration device 4 and differential gear 5.Here, from the end on observation of motor axis J2, to by motor axis J2 and differential shaft Imaginary line (the 3rd line segment illustrated in aftermentioned paragraph) L3 that line J5 hypothetically links is defined.Gear chamber top 64 and imagination Line L3 is substantially parallel.By keeping gear chamber top 64 substantially parallel with imaginary line L3, and it can substantially ensure and utilize ring gear 51 promotions and the region passed through to the oily O that the direction that imaginary line L3 extends is dispersed, so as to make oily O and with motor axis J Centered on the 1st gear 41 that rotates effectively contact.In addition, by make at the top of gear chamber 64 with imaginary line L3 substantially parallel, energy Enough inhibit shell 6 enlarged in vertical direction.

In addition, here, 64 refer to 64 and imaginary line L3 at the top of gear chamber with imaginary line L3 " substantially parallel " at the top of gear chamber Formed angle is within 10 °.In 64 curved situations at the top of gear chamber, the tangent line of all the points of bending line and imaginary line L3 institute At angle be 10 ° within.

In addition, if the range within 10 °, then at the top of preferred gear chamber 64 with from the side differential axis J5 towards motor drive shaft The side line J2 and close to imaginary line L3.Thereby, it is possible to minimize shell 6.

In addition, at the top of gear chamber 64 be with from the side differential axis J5 towards the side motor axis J2 and to close to imaginary line L3 The curved surface that the direction of side is slight curving.64 curved shape is retouched with the oily O promoted by ring gear 51 at the top of gear chamber Roughly the same or slightly separated from ring gear 51 curved surface of the parabola drawn.Utilize one of the oily O that ring gear 51 is promoted Divide and directly reaches the 1st liquid storage device 93.In addition, using ring gear 51 promoted oily O another part along shell 6 gear chamber It flows and reaches the 1st liquid storage device 93 in top 64.That is, gear chamber top 64 plays the role of guiding oily O to the 1st liquid storage device 93.

64 have downward side protrusion 65 outstanding at the top of gear chamber.Protrusion 65 is located at the upside of the 1st liquid storage device 93.Along tooth The oily O of 64 flowings becomes biggish drop in the lower end of protrusion 65 at the top of engineer room, falls on lower section and lodges in the 1st liquid storage device 93. That is, protrusion 65 will be guided along the oily O of 64 flowings at the top of gear chamber to the 1st liquid storage device 93.

In the present embodiment, motor incorporating section 61 and gear incorporating section 62 are fixed to each other by bolt 67.Protrusion 65 exists It is arranged in 64 at the top of gear chamber using the thick wall part around the threaded hole being inserted into for bolt 67.In addition, being omitted in Fig. 3 Other thick wall parts around other bolts and threaded hole that motor incorporating section 61 and gear incorporating section 62 are fixed Diagram.

64 eaves portion 66 with the plate axially extended at the top of gear chamber.The downward side of eaves portion 66 is prominent.Eaves portion 66 Lower end is located at the upside of the 1st liquid storage device 93.Promote a part of the oily O to disperse by ring gear 51 and eaves portion 66 contacts and Along the surface flow of eaves portion 66.Similarly, the oily O to disperse is promoted by the 2nd gear 42 and the 3rd gear to be blocked by eaves portion 66 And along the surface flow of eaves portion 66.Oily O becomes biggish drop in the lower end of eaves portion 66, falls on lower section and lodges in the 1st storage Liquid device 93.That is, eaves portion 66 guides the oily O of promotion to the 1st liquid storage device 93.

Eaves portion 66 rolls oblique with from upside towards downside from the side differential axis J5 towards motor axis J2.Ring gear 51 to the 2 gears 42 and 43 major diameter of the 3rd gear, therefore the close level of angle of dispersing of the oily O to be dispersed.By make eaves portion 66 to Above-mentioned direction tilts and configures, the oily O to disperse from ring gear 51 can be made successfully to be attached to the surface of eaves portion 66 and fall on Downside.

1st liquid storage device 93 is located at the surface of ring gear 51, the 2nd gear 42 and the 3rd gear 43.It is seen along vertical direction When examining, the opening of the 1st liquid storage device 93 is Chong Die with ring gear 51, the 2nd gear 42 and the 3rd gear 43.It is promoted by gear Oil major part disperse to promotion gear surface.By the way that the 1st liquid storage device 93 is configured at ring gear 51, the 2nd gear The surface of 42 and the 3rd gear 43 can effectively receive the oily O promoted using each gear.

1st liquid storage device 93 has bottom 93a, the 1st sidewall portion 93b and the 2nd sidewall portion 93c.Bottom 93a, the 1st sidewall portion 93b and the 2nd sidewall portion 93c between the wall surface of the projecting plate portion 61d of gear incorporating section 62 and motor incorporating section axially Extend.1st sidewall portion 93b and the 2nd sidewall portion 93c extends from bottom 93a to upside.1st sidewall portion 93b constitutes the 1st liquid storage device The wall surface of 93 5 side of differential gear.2nd sidewall portion 93c constitutes the wall surface of 4 side of deceleration device of the 1st liquid storage device 93.That is, the 1st side Wall portion 93b extends from the end of the side differential axis J5 of bottom 93a to upside, motor drive shaft of the 2nd sidewall portion 93c from bottom 93a The end of the side line J2 extends to upside.1st liquid storage device 93 by bottom 93a, the 1st sidewall portion 93b, the 2nd sidewall portion 93c and Temporary store oil O in the region that the wall surface of the projecting plate portion 61d of gear incorporating section 62 and motor incorporating section surrounds.

The height of 1st upper end sidewall portion 93b is located at the position of upper end on the lower than the 2nd sidewall portion 93c.Oily O is logical The promotion of differential gear 5 is crossed, and is dispersed from the opposite side of deceleration device 4 towards the 1st liquid storage device 93.By reducing the 1st sidewall portion 93b Upper end height, the oily O promoted by differential gear 5 can be effectively stored in the 1st liquid storage device 93.In addition, can Make to be promoted by ring gear 51 be more than in the oily O to disperse the 1st sidewall portion 93b oily O and the 2nd sidewall portion 93c contact and It guides to the 1st liquid storage device 93.

2nd sidewall portion 93c extends along the circumferential of the 1st gear 41 towards oblique upper.That is, the 2nd sidewall portion 93c is with direction Upside and towards motor axis J2 tilt.The 2nd sidewall portion 93c can receive to mention by differential gear 5 in wider range as a result, The oily O risen.In addition, the 2nd sidewall portion 93c can receive the oily O's flowed along the top of storage space 80 in wider range Drop.

The boundary portion of 93a and the 2nd sidewall portion 93c in bottom, the inside of axis supply line 94 towards the 1st liquid storage device 93 are opened Mouthful.Bottom 93a is slightly slanted downward when overlooking with towards the side motor axis J2.That is, bottom 93a is according to as the 2nd The mode of the side sidewall portion 93c lower end is slightly slanted.Therefore, by the way that the opening of axis supply line 94 is set to bottom 93a and the 2nd Between sidewall portion 93c, the oily O in the 1st liquid storage device 93 can be effectively supplied to axis supply line 94.

Axis feed path 91b guides oily O to motor 2 from the 1st liquid storage device 93.Axis feed path 91b is by axis supply line 94 are constituted.Axis supply line 94 extends from the 1st liquid storage device 93 towards 21 end of axis.Axis supply line 94 linearly extends.Axis Supply line 94 is tilted with from the 1st liquid storage device 93 towards the end of axis 21 towards downside.Axis supply line 94 is by tooth The processing of wheel incorporating section 62 penetrates through the inside and outside hole of storage space 80 and is formed.The opening in the outside in the hole processed (is saved by cap portion Sketch map shows) it seals.Axis supply line 94 guides the oily O for lodging in the 1st liquid storage device 93 to hollow portion 22 from the end of axis 21.

As shown in Figure 1, path 91c is the path that oily O passes through in the hollow portion 22 of axis 21 in axis.In addition, road in rotor Diameter 91d be from the intercommunicating pore 23 of axis 21 by be located at the inside of the end plate 26 of the axial end face 24a of rotor core 24 disperse to The path of stator 30 (referring to Fig. 5).That is, the 1st oil circuit 91 has the path for passing through rotor core 24 from the inside of axis 21.

In axis in the 91c of path, centrifugal force is assigned to the oily O of the inside of rotor 20 with the rotation of rotor 20.As a result, Oily O continuously disperses from end plate 26 to radial outside.Become negative in addition, dispersing with oily O, in the path inside rotor 20 Pressure, the oily O for lodging in the 1st liquid storage device 93 are attracted to the inside of rotor 20, and the path inside rotor 20 is full of oil O.Oily O is logical The capillary force crossed in the 1st oil circuit 91 also can promote to the movement inside rotor 20.The oily O for reaching stator 30 is absorbed from stator 30 Heat.

(the 2nd oil circuit)

As shown in Figure 1, oily O lifts to the upside of motor 2 from store oil portion P and supplies to motor 2 in the 2nd oil circuit 92.For Stator 30 is followed while flowing along the outer peripheral surface of stator 30 to the oily O to motor 2 and absorbs heat, to carry out to motor 2 cold But.The region of lower section and the downside that lodges in motor chamber 81 is dripped to along the oily O that the outer peripheral surface of stator 30 flows.2nd oil circuit 92 Oily O and the region of downside of the oily O in motor chamber 81 of the 1st oil circuit 91 collaborate.Lodge in the region of the downside of motor chamber 81 The region (i.e., store oil portion P) for the downside that oily O is moved to gear chamber 82 via interval wall opening 68.

Figure 10 is the cross-sectional view of motor unit 1.In addition, the section of Figure 10 is axially biased in each region.

2nd oil circuit 92 has the 1st flow path 92a, the 2nd flow path 92b and the 3rd flow path 92c.In the path of the 2nd oil circuit 92 It is provided with pump 96, cooler 97 and the 2nd liquid storage device 98.In the 2nd oil circuit 92, oily O is according to the 1st flow path 92a, the 96, the 2nd stream of pump Road 92b, cooler 97, the 3rd flow path 92c, the 2nd liquid storage device 98 sequence supplied by each portion to motor 2.

Pump 96 is the electrodynamic pump driven by electricity.Pump 96 be installed on be arranged in the lateral surface of shell 6 pump installation it is recessed Portion 6c.Pump 96 has suction inlet 96a and pump discharge 96b.Suction inlet 96a and pump discharge 96b company via the internal flow path of pump 96 It connects.In addition, suction inlet 96a is connect with the 1st flow path 92a.Pump discharge 96b is connect with the 2nd flow path 92b.Pump discharge 96b is located at than inhaling Entrance 96a upper position.Pump 96 picks up oily O from store oil portion P via the 1st flow path 92a, and via the 2nd flow path 92b, Cooler 97, the 3rd flow path 92c and the 2nd liquid storage device 98 and supply to motor 2.

It is properly controlled using the supply amount of the oily O of 96 pairs of motors 2 of pump according to the driving condition of motor 2.Therefore, exist The case where needing driving for a long time or high output etc. improves the driving output of pump 96 by improving the temperature of motor 2, thus Increase the supply amount to the oily O of motor 2.

Cooler 97 has inflow entrance 97a and outflux 97b.Inflow entrance 97a and outflux 97b are via in cooler 97 Portion's flow path and connect.In addition, inflow entrance 97a is connect with the 2nd flow path 92b.Outflux 97b is connect with the 3rd flow path 92c.Inflow entrance 97a is located at close to the side (i.e. downside) of pump 96 compared with outflux 97b.In addition, cooler 97 be internally provided with for from The cooling water piping (illustration omitted) that the cooling water of radiator supply passes through.By the oily O of the inside of cooler 97 with it is cold But heat exchange is carried out between water and cooled down.

Pump 96 and cooler 97 are fixed on the outer peripheral surface of the motor incorporating section 61 of shell 6.It is seen from the axial direction of motor axis J2 When examining, pump 96 and cooler 97 clip motor axis J2 and are located at the side opposite in the horizontal direction with differential gear 5.Separately Outside, pump 96 and cooler 97 arrange in the up-down direction.Cooler 97 is located at the upside of pump 96.It is observed along vertical direction, it is cooling Device 97 is Chong Die with pump 96.

According to the present embodiment, pump 96 and cooler 97 clip motor axis J2 with differential gear 5 and are located at opposite one Side, so as to effectively utilize the space around motor 2.Thereby, it is possible to reduce motor unit 1 it is whole along horizontal direction Size, can be realized the miniaturization of motor unit 1.

According to the present embodiment, pump 96 and cooler 97 are fixed on the outer peripheral surface of shell 6.Therefore, with pump 96 and cooler 97 situations for being set to the outside of shell 6 are compared, and can aid in the miniaturization of motor unit 1.In addition, will pump 96 and cooler 97 are fixed on the outer peripheral surface of shell 6, so as to utilize the 1st flow path 92a, the 2nd flow path of the inside of the wall portion 6a by shell 6 92b and the 3rd flow path 92c constitutes the flow path for connecting storage space 80 with pump 96 and cooler 97.

According to the present embodiment, cooler 97 is fixed on the outer peripheral surface of shell 6, therefore can make storage space 80 and cooling The distance of device 97 is close.Thereby, it is possible to shorten the 3rd flow path 97c for connecting cooler 97 with storage space 80, so as to incite somebody to action Oil O after cooling is supplied with the low state of temperature to storage space 80.

The wall portion 6a that 1st flow path 92a, the 2nd flow path 92b and the 3rd flow path 92c pass through the shell 6 of encirclement storage space 80 Inside.For the 1st flow path 92a, as the hole for being formed in wall portion 6a, be capable of forming the 1st flow path 92a, the 2nd flow path 92b and 3rd flow path 92c.It is therefore not necessary in addition prepare tubing and can aid in reduction number of components.

In addition, inside of the 1st flow path 92a by the part of the downside positioned at motor 2 in wall portion 6a.2nd flow path 92b is logical Cross the inside of the part of the horizontal direction side positioned at motor 2 in wall portion 6a.In addition, the 3rd flow path 92c passes through in wall portion 6a Positioned at the inside of the part of the upside of motor 2.

1st flow path 92a connects store oil portion P and pump 96.1st flow path 92a has the 1st end 92aa and the 2nd end 92ab。

1st end 92aa is located at the upstream side of the 2nd oil circuit 92 compared with the 2nd end 92ab.1st end 92aa is in differential dress 5 downside is set to be open in storage space 80.When along vertical direction observation, the 1st end 92aa is Chong Die with motor 2.

2nd end 92ab is connect in pump mounting recess 6c inner opening with the suction inlet 96a of pump 96.

As described above, differential gear 5 and pump 96 clip motor axis J2 and are mutually located at horizontal direction opposite side.1st flow path 92a extends in the way of clipping motor 2 and being set up in horizontal direction opposite side.In addition, the 1st flow path 92a passes through under motor 2 Side.

According to the present embodiment, the 1st flow path 92a passes through the downside of motor 2, therefore can efficiently use the downside of motor 2 Region and the size of motor unit 1 can be reduced.Thereby, it is possible to realize the miniaturization of motor unit 1.

When along end on observation, at least part of the 1st flow path 92a is Chong Die with the 2nd gear 42 and ring gear 51.As a result, The size that the motor unit 1 in the case where the end on observation can be reduced, can be realized the miniaturization of motor unit 1.

In addition, in the present embodiment, to be connected between motor 2 and differential gear 5 multiple gears (the 1st gear 41, 2nd gear 42, the 3rd gear 43 and ring gear 51) in the 2nd gear 42 and ring gear 51 along end on observation Shi Yu The case where 1 flow path 92a is overlapped is illustrated.But it as long as is connected in multiple gears between motor 2 and differential gear 5 At least one is Chong Die with the 1st flow path 92a when along end on observation, then can play above-mentioned effect.

1st flow path 92a extends to the suction inlet 96a of pump 96 from the downside of differential gear 5.1st flow path 92a is with from the 1st End 92aa towards incline upward and linearly extends towards the 2nd end 92ab.In addition, the suction inlet 96a of pump 96 is located at Position more upper than the lower end of differential gear 5 and than motor axis J2 on the lower.

In order to avoid pump 96 is collided by the slungshot from road surface in the state that motor unit 1 is equipped on vehicle, preferably Pump 96 is configured at the position far from road surface.On the other hand, the suction inlet 96a for pumping 96 is configured at pasta than store oil portion P on the lower The position of side, so as to inhibit to be involved in air.

The suction inlet 96a of present embodiment is located at the position than motor axis J2 on the lower.It is easy to make suction inlet as a result, 96a is configured at the position of pasta on the lower than store oil portion P.In addition, the suction inlet 96a of present embodiment is located at than differential gear The upper position in 5 lower end.Thereby, it is possible to realize to make to pump 96 constructions far from road surface.In addition, suction inlet 96a is configured at Than the position of motor axis J2 on the lower, to be easy the 1st flow path 92a being configured to linear.Therefore, make the 1st stream in use In the case where construction of the road 92a by the inside of the wall portion 6a of shell 6, the ease of processing of the 1st flow path 92a can be improved.

The suction inlet 96a of present embodiment is located at the position of the liquid level of the store oil portion P than storage space 80 on the lower.Separately Outside, the height of the liquid level of store oil portion P changes due to from store oil portion P to the 1st oil circuit 91 and the 2nd oil circuit 92 for oil supply O.Sucking Mouth 96a also is located at the position than liquid level on the lower in the case where the height of the liquid level of store oil portion P is minimum.

In Fig. 1 as, suction inlet 96a is depicted to the upside of the liquid level positioned at store oil portion P.But Fig. 1 is only schematic diagram, Actual suction inlet 96a is located at the position of liquid level on the lower than store oil portion P.

2nd flow path 92b is connected pumping 96 with cooler 97.2nd flow path 92b has the 1st end 92ba and the 2nd end 92bb.1st end 92ba is connect in pump mounting recess 6c inner opening with the pump discharge 96b of pump 96.1st end 92ba and the 2nd End 92bb is compared positioned at the upstream side of the 2nd oil circuit 92.2nd end 92bb is connect with the inflow entrance 97a of cooler 97.2nd end Portion 92bb is located at the position more upper than the 1st end 92ba.

2nd flow path 92b has the 1st road 92bd and the 2nd road 92be.1st road 92bd extends from pump mounting recess 6c to upside. The upper end of 2nd road 92be from the 1st road 92bd is horizontally extending.1st road 92bd and the 2nd road 92be are respectively by shell 6 Wall portion 6a on process from different directions extend and cross one another hole and formed.

3rd flow path 92c connects cooler 97 and storage space 80.3rd flow path 92c is linear along horizontal direction Shape extends.3rd flow path 92c has the 1st end 92ca and the 2nd end 92cb.The position compared with the 2nd end 92cb 1st end 92ca In the upstream side of the 2nd oil circuit 92.1st end 92ca is connect with the outflux 97b of cooler 97.2nd end 92cb is in motor 2 Upside is open in storage space 80.That is, the 3rd flow path 92c is in storage space 80 in the upper side opening of motor 2.3rd flow path 92c The 2nd end 92cb function as supplying oily O to the supply unit 99 of the 2nd liquid storage device 98 for being located at storage space 80.That is, 2nd oil circuit 92 supplies oily O to the 2nd liquid storage device 98 in supply unit 99.

The outflux 97b of cooler 97 is Chong Die with motor 2 in the axial direction of motor axis J2.That is, the outflow of cooler 97 Mouth 97b configuration is Chong Die with motor 2 when radially observing.In other words, the outflux 97b of cooler 97 is presented axially in stator Between 30 both ends.Therefore, the 3rd flow path for connecting the outflux 97b of cooler 97 and storage space 80 can be shortened 92c can be supplied oil O after cooling to storage space 80 with the low state of temperature.In addition, by the way that the 3rd flow path 97c is configured At be overlapped radially with motor 2, the axial dimension of motor unit 1 can be reduced, can be realized the miniaturization of motor unit 1.

(the 2nd liquid storage device)

Figure 11 is the perspective view of motor unit 1.In addition, Figure 12 is the top view of the 2nd liquid storage device 98.In addition, in Figure 11, The motor incorporating section 61 of shell 6 and the diagram of closure 63 is omitted.

As shown in figure 11, the 2nd liquid storage device (main liquid storage device) 98 is located at the motor chamber 81 of storage space 80.2nd liquid storage device 98 Positioned at the upside of motor.2nd liquid storage device 98 has bottom (the 1st bottom 98c and the 2nd bottom 98g) and side extends bottom-up Sidewall portion (the 1st sidewall portion 98d, the 2nd sidewall portion 98e, the 3rd sidewall portion 98f, the 4th sidewall portion 98h, the 5th sidewall portion 98i, the 6th Sidewall portion 98j and the 7th sidewall portion 98n).2nd liquid storage device 98 will be via the supply unit 99 of the 3rd flow path 92c supply to motor chamber 81 oily O is stored in the space surrounded by bottom and side wall portion.2nd liquid storage device 98 have multiple outfluxes (the 1st outflux 98r, 2nd outflux 98o, the 3rd outflux 98x, the 4th outflux 98t, the 5th outflux 98u and the 6th outflux 98v).Each outflux The oily O lodged in the 2nd liquid storage device 98 is supplied to motor 2.That is, the 2nd liquid storage device 98 by the oily O stored via outflux and It supplies from upside to each portion of motor 2.

According to the present embodiment, the 2nd liquid storage device 98 is located at the upside of motor 2, and the oily O stored is supplied from multiple outfluxes To the upside of motor 2.Oily O flows and absorbs the heat of motor 2, therefore energy along the outer peripheral surface of motor 2 from upside towards downside It is enough that 2 entirety of motor is cooled down.

As shown in figure 12, the 2nd liquid storage device 98, which has, is presented axially in the 1st end 98p of 82 side of gear chamber and in axial direction Upper the 2nd end 98q positioned at the side opposite with the 1st end 98p.In addition, the 2nd liquid storage device 98 has the slot axially extended 1st reservoir 98A of shape and the 2nd reservoir 98B for being located at the 2nd end side 98q relative to the 1st reservoir 98A.

1st reservoir 98A has the 1st bottom 98c, the 1st sidewall portion 98d, the 2nd sidewall portion 98e and the 3rd sidewall portion 98f. In addition, being provided with the 1st outflux 98r, the 2nd outflux 98o and the 3rd outflux 98x in the 1st reservoir 98A.

1st bottom 98c is using axial direction as the rectangular-shaped of length direction.The axial two-end part of 1st bottom 98c is in setting In the upside of the end turn 31a at the both ends of stator 30.1st bottom 98c is provided with the 1st outflux 98r.1st outflux 98r is located at the region of the 1st end side 98p of the 1st bottom 98c.

1st sidewall portion 98d and the 2nd sidewall portion 98e are axially extended.In addition, the 1st sidewall portion 98e and the 2nd sidewall portion 98e is opposed in the circumferential direction of motor axis J2.

1st sidewall portion 98d is provided with inflow entrance 98s.Inflow entrance 98s is the notch of the U-shaped of upward side opening.It flows into Mouth 98s is connected with supply unit 99.Inflow entrance 98s is located at the axial middle part of the 1st sidewall portion 98d.Inflow entrance 98s can as a result, Oily O is set to flow to the 1st end 98p and the 2nd end side 98q respectively in the 2nd liquid storage device 98.

It is provided in the 2nd sidewall portion 98e to the 1st side sidewall portion 98d protrusion 98w outstanding.Protrusion 98w is located at inflow entrance The front of 98s.Protrusion 98w has makes projecting height be lower with from center towards the 1st end side 98p and the 2nd end side 98q Inclined surface.Protrusion 98w makes the oily O for flowing to the 2nd liquid storage device 98 from inflow entrance 98s successfully branch to the 1st end side 98p and The 2 ends side 98q.

2nd sidewall portion 98e is provided with the 2nd outflux 98o.2nd outflux 98o is located at the 1st end of the 2nd sidewall portion 98e The region of the portion side 98p.2nd outflux 98o is located near the 1st outflux 98r.

As shown in figure 11, the 3rd sidewall portion 98f is located at the 1st end side 98p of the 2nd liquid storage device 98.3rd sidewall portion 98f is located at The upside of one end turn 31a of stator 30.The height of the upper end of 3rd sidewall portion 98f is than the 1st sidewall portion 98d and the 2nd side The height of the upper end of wall portion 98e is low.In addition, under the height of the upper end of the 3rd sidewall portion 98f and the opening of the 2nd outflux 98o The height at end is roughly equal.What the space of the upside of the 2nd sidewall portion 98e was got higher in the liquid level for the oily O for lodging in the 2nd liquid storage device 98 In the case of as fuel feeding O outflow the 3rd outflux 98x function.

2nd reservoir 98B along stator 30 circumferentially extending.2nd reservoir 98B has the 2nd bottom 98g, the 4th sidewall portion 98h, the 5th sidewall portion 98i, the 6th sidewall portion 98j, the 7th sidewall portion 98n and stage portion 98k.

In addition, being provided with the 4th outflux 98t, the 5th outflux 98u, the 6th outflux 98v in the 2nd reservoir 98B and overflowing Portion 98y out.

2nd bottom 98g is located at the 2nd end side 98q relative to the 1st bottom 98c.2nd bottom 98g is located at than the 1st bottom 98c Position on the lower.The boundary of 1st bottom 98c and the 2nd bottom 98g is provided with stage portion 98k.2nd reservoir 98B be located at than The position of 1st reservoir 98A on the lower.The oily O that the 2nd end side 98q is flowed in the 1st reservoir 98A lodges in the 2nd storage Portion 98B.

2nd bottom 98g is located at the upside of an end turn 31a of stator 30.2nd bottom 98g along motor 2 periphery Face bending.Do not increase the size of motor unit 1 as a result, and is capable of increasing the capacity for being stored in the oily O of the 2nd liquid storage device 98.2nd Bottom 98g is partially toward circumferential two sides and rolls downwards when observing along the vertical direction with from Chong Die with motor axis J2 Tiltedly.2nd reservoir 98B clips motor axis J2 when observing along the vertical direction and connect in side with the 1st reservoir 98A.

As shown in figure 12, about the 2nd reservoir 98B, motor axis J2 will be clipped when will observe along the vertical direction and in side Region be the region division that is connect with the 1st reservoir 98A into the 1st region 98gA, motor axis J2 will be clipped and in the other side Region division at the 2nd region 98gB.On the boundary line of the 1st region 98gA and the 2nd region 98gB, the 2nd bottom 98g highest. The oily O for flowing into the 2nd reservoir 98B from the 1st reservoir 98A lodges in the 1st region 98gA first, is lodging in the 1st region At the time of the liquid level of 98gA reaches the height of boundary line, oily O flows into the 2nd region 98gB.In this way, boundary line is as being set to the The weir 98gC of 2 bottom 98g is functioned.That is, being provided with according to upwardly projecting mode by the 2nd liquid storage device in the 2nd bottom 98g 98 the 2nd reservoir 98B is divided into the weir 98gC of the 1st region 98gA and the 2nd region 98gB.Oily O flows into a region the (the 1st Region 98gA) and liquid level is made to be more than weir 98gC, to flow into another region (the 2nd region 98gB).

As described later, the 6th sidewall portion 98j circumferentially extended is provided with the 4th outflux circumferentially arranged 98t, the 5th outflux 98u, the 6th outflux 98v.In addition, being provided with spilling portion 98y in the 5th sidewall portion 98i.4th outflux 98t It is open with the 5th outflux 98u in the 1st region 98gA, the 6th outflux 98v and spilling portion 98y are open in the 2nd region 98gB.That is, 2nd liquid storage device 98 is respectively arranged with outflow in the multiple regions (the 1st region 98gA and the 2nd region 98gB) divided by weir 98gC Mouthful.Therefore, oily O is only flowed from the 4th outflux 98t and the 5th outflux 98u before the liquid level of the 1st region 98gA is more than weir 98gC Out.In addition, oil O is after the liquid level of the 1st region 98gA is more than weir 98gC, from the 4th outflux 98t, the 5th outflux 98u, the 6th Outflux 98v and spilling portion 98y outflow.Therefore, according to the present embodiment, in the 2nd liquid storage device 98, can increase as oil O Storage capacity when increasing and the quantity of outflux that flows out.In particular, making motor 2 become high temperature when the load of motor 2 increases When, increased by the supply amount of the oily O of pump 96 supply to the 2nd liquid storage device 98.Therefore, according to the present embodiment, become in motor 2 In the case where high temperature, the oily O of feed point to(for) motor 2 can be increased and broadening cooling range, and motor 2 can be increased The supply amount of the oily O of supply.

4th sidewall portion 98h and the 5th sidewall portion 98i is located at the circumferential both ends of the 2nd reservoir 98B.4th sidewall portion 98h It is opposed in the circumferential with the 5th sidewall portion 98i.4th sidewall portion 98h and the 5th sidewall portion 98i are axially extended.4th sidewall portion 98h connect with the 1st sidewall portion 98d and extends to the 2nd end side 98q.

5th sidewall portion 98i is provided with spilling portion 98y.Spilling portion 98y is upper end and the height for being set to the 5th sidewall portion 98i The lower part in degree part.Spilling portion 98y is located at the 4th outflux 98t, the 5th outflux 98u than the 2nd reservoir 98B and the The upper position in the lower end of the opening of 6 outflux 98v.Therefore, liquid level of the oily O in the 2nd reservoir 98B becomes than the 4th stream After exporting 98t, the 5th outflux 98u and the 6th outflux 98v high, overflowed from spilling portion 98y.It is arranged in the downside of spilling portion There is aftermentioned secondary liquid storage device 95.The oily O overflowed from spilling portion 98y is stored in secondary liquid storage device 95.

In addition, in the present specification, " spilling " refer in the case that the liquid in liquid storage device reaches certain liquid level from Liquid storage device outflow.Therefore, the case where liquid is flowed out from the bottom of liquid storage device etc. is not suitable for " overflowing ".

6th sidewall portion 98j is located at the 2nd end side 98q of the 2nd liquid storage device 98.6th sidewall portion 96j circumferentially extends.The 6 sidewall portion 98j are located at the upside of an end turn 31a of stator 30.The 6th sidewall portion 98j be provided with the 4th outflux 98t, 5th outflux 98u and the 6th outflux 98v.4th outflux 98t, the 5th outflux 98u and the 6th outflux 98v are settings In the inside and outside hole of the 6th sidewall portion 98j and the 2nd liquid storage device 98 of perforation.4th outflux 98t, the 5th outflux 98u and the 6th stream Outlet 98v is circumferentially arranged.As shown in figure 11, the height of the 4th outflux 98t, the 5th outflux 98u and the 6th outflux 98v It spends different.Therefore, according to the present embodiment, fuel feeding O outflow can be increased according to the liquid level of the oily O in the 2nd liquid storage device 98 Outflux quantity.Thereby, it is possible to increase the oily O of feed point to(for) motor 2 and broadening cooling range, and can increase The supply amount of the oily O of the supply of motor 2.

In addition, as long as such effect is at least two outfluxes being set in multiple outfluxes of the 2nd liquid storage device 98 The mutually different effect that can be played of height.

7th sidewall portion 98n circumferentially extends.7th sidewall portion 98n and the 6th sidewall portion 98j are opposed in the axial direction.7th side Wall portion 98n and stage portion 98k are circumferentially continuous.7th sidewall portion 97n is provided with the fixing screws progress to stator core 32 The incorporating section 98na of storage.

According to the present embodiment, the 2nd oil circuit 92 supplies the oily O stored in the 2nd liquid storage device 98 from multiple outfluxes To motor 2.Each outflux supplies oily O to motor 2 according to certain flow, therefore can be improved oily O and imitate to the cooling of motor 2 Rate.

According to the present embodiment, the 2nd liquid storage device 98 has multiple outfluxes (the 1st outflux 98r, the 2nd outflux 98o, the 3 outflux 98x, the 4th outflux 98t, the 5th outflux 98u and the 6th outflux 98v).Therefore, the 2nd liquid storage device 98 can be same When from many places to motor 2 for oil supply O, each section of motor 2 can be cooled down simultaneously.

According to the present embodiment, the 2nd liquid storage device 98 axially extends.In addition, in the 2nd liquid storage device 98, in axial direction Both ends are respectively arranged with outflux.In addition, the outflux for being located at the axial ends portion of the 2nd liquid storage device 98 is located at end turn The upside of 31a.Thereby, it is possible to be located at stator 30 axial ends end turn 31a apply oil O and directly to coil 31 into Row cooling.More specifically, the oily O for being applied to coil 31 is immersed from the mutual gap of conducting wire for constituting coil 31.It immerses to line Circle 31 oily O on one side by acting on conduit capillary force and gravity be impregnated with to coil 31 it is whole while follow coil absorption Heat.In addition, oil O lodges in the lowest part of the inner peripheral surface of stator core 32, dripped from the axial ends of coil 31.

In addition, directly carrying out cooling effect to oily O and directly to end turn 31a for oil supply O is by multiple At least two outfluxes in outflux are located at the axial both ends of the 2nd liquid storage device 98 and the effect that can play.

According to the present embodiment, the 2nd liquid storage device 98 is presented axially in for the supply unit 99 of oil supply O and is located at the 2nd Between the outflux at the both ends of liquid storage device 98.It therefore, can be from the stream for being located at both ends from the oily O that supply unit 99 supplies It flows out respectively outlet.

(variation of the 2nd liquid storage device)

Figure 13 is the perspective view of the 2nd liquid storage device 198 of the variation that can be used in the present embodiment.In addition, for The structural element of mode identical with above embodiment, is illustrated using identical label.

2nd liquid storage device 198 of variation is the shallower box of the rectangle of upper side opening.2nd liquid storage device 198 has center Four oily supply unit 198b around store oil portion 198a and centrally located store oil portion 198a.Central store oil portion 198a and four oil Supply unit 198b is spaced from each other.

Central store oil portion 198a accumulates the oily O flowed into from supply unit 99.Central store oil portion 198a passes through circular bottom surface The 198ab and cylindrical wall 198aa extended from bottom surface 198ab to upside and separated with oily supply unit 198b.

Four oil supply unit 198b are configured to surround central store oil portion 198a.Oily supply unit 198b has substantially rectangular shape. It is provided with and oil in the two mutual adjacent corners of outer wall 198ba of oily supply unit 198b extended along mutually different direction The outflux 198c of the inside and outside connection of supply unit 198b.An axial upper opening in motor 2 in two outflux 198c, separately One is open in the circumferential.Four oil supply unit 198b are respectively provided with two outflux 198c, therefore the 2nd liquid storage device 198 is total With 8 outflux 198c.

2nd liquid storage device 198 is configured to bottom surface in the upper horizontal of stator 30.The oily O supplied from supply unit 99, which works as, to be full of It is overflowed when central store oil portion 198a from cylindrical wall 198aa and flows into four oily supply unit 198b.2nd liquid storage device 198 is arranged to Horizontal and cylindrical wall 198aa is identical height in whole circumference, therefore oil O is uniformly flowed into four oily supply units 198b.Oily O lodges in four oily supply unit 198b, and flows out from outflux 198c to outside.

The length axially of 2nd liquid storage device 198 is longer than the length axially of stator core 32.Oily O is from one Oily supply unit 198b via axially with two circumferential outflux 198c and supply to motor 2.According to this modification, the 2nd Liquid storage device 198 can be from multiple outfluxes towards multiple directions and to motor 2 for oil supply O.

(secondary liquid storage device)

Figure 14 is the cross-sectional view for showing the motor unit 1 of outline of secondary liquid storage device 95.In addition, passing through imagination in Figure 14 Line shows the protruding portion 63d for being set to the closure 63 of shell 6.In addition, in Figure 14, emphasizes to show with dot pattern and be stored in pair The oily O of liquid storage device 95.

Secondary liquid storage device 95 receives the oily O overflowed from the 2nd liquid storage device 98 in the 2nd oil circuit 92.That is, on the road of the 2nd oil circuit 92 The secondary liquid storage device 95 of store oil O is provided in diameter.2nd liquid storage device 98 plays function as main liquid storage device relative to secondary liquid storage device 95 Energy.2nd liquid storage device 98 is located at the upstream side of the 2nd oil circuit 92 relative to secondary liquid storage device 95.

Secondary liquid storage device 95 is located at the underface of spilling portion 98y.That is, secondary liquid storage device 95 and spilling portion 98y are seen along vertical direction Overlapping when examining.The oily O that thereby, it is possible to receive to overflow from the 2nd liquid storage device 98 by secondary liquid storage device 95.

Secondary liquid storage device 95, which has, to be located at the part 1 95A of circumferential side relative to the 2nd liquid storage device 98 and is located at circumferential another The part 2 95B of side.Part 1 95A and part 2 95B is connected with each other.Secondary liquid storage device 95 is in part 1 95A and part 2 It is respectively provided with two in 95B, amounts to four outflux 61k.Four outflux 61k along motor 2 circumferential array.In addition, more The height of a outflux 61k is different.

Secondary liquid storage device 95 is made of the inner wall of the medial surface 61g of motor incorporating section 61 and the protruding portion 63d of closure 63. The medial surface 61g of motor incorporating section 61 is with the inner peripheral surface 61i towards radially inner side and is axially toward 63 side of closure Opposed faces 61h.The face contact axially of opposed faces 61h and protruding portion 63d.Oily O will not be from protruding portion 63d and opposed faces The contact portion of 61h flows out.According to the present embodiment, secondary liquid storage device 95 is constituted as the gap between other component, there is no need to Using other component, it is able to suppress the increase of number of components.

Opposed faces 61h is provided with circumferentially arrangement and along the recess portion 61j of axial depression.Recess portion 61j direction makes motor The direction recess that gap between the inner wall of the medial surface 61g and protruding portion 63d of incorporating section 61 increases.Oily O from recess portion 61j to Downside outflow.That is, recess portion 61j constitutes outflux 61k.Outflux 61k is located at the upside of the end turn 31a of stator 30.Therefore, The oily O flowed out from outflux 61k cools down the coil 31 of end turn 31a.

In addition, in the present embodiment, exemplifying the inner wall in the medial surface 61g and protruding portion 63d of motor incorporating section 61 The contact portion in face, the case where medial surface 61g is provided with recess portion 61j.But it is also possible to which the inner wall in protruding portion 63d is set It is equipped with recess portion.

According to the present embodiment, other than the 2nd liquid storage device 98, it is additionally provided with secondary liquid storage device 95, thus in addition to the 2nd liquid storage Other than the outflux of device 98, additionally it is possible to flow out oily O from the outflux 61k of secondary liquid storage device 95, can wide scope to motor 2 into Row cooling.In addition, multiple outflux 61k of secondary liquid storage device 95 are configured to circumferentially arrange.Thereby, it is possible in wider range The end turn 31a of stator 30 is cooled down.In addition, the height of multiple outflux 61k is different, therefore can be according to product It is different at the time of being stored in the liquid level of the oily O of secondary liquid storage device 95 and make to flow out.

According to the present embodiment, secondary liquid storage device 95 is stored in from the oily O that the 2nd liquid storage device 98 overflows.Pump 96 becomes in motor 2 High load capacity and in the case where raising the temperature, increase supply to the 2nd liquid storage device 98 oily O supply amount.Therefore, motor 2 at In the case where for high load capacity, oily O is overflowed from the 2nd liquid storage device 98, can also be supplied oily O in the outflux 61k of secondary liquid storage device 95 To motor 2.It according to the present embodiment, can be in oily O to the wide scope of motor 2 in the case where motor 2 becomes high load capacity It is cooled down.That is, by the way that secondary liquid storage device 95 is arranged, motor 2 movement from stable state variation be higher load condition the case where Under, can expanding supply to the supply range of the oily O of motor 2.

In addition, the lower end of the secondary liquid storage device 95 of present embodiment is located at the position more upper than motor axis J2.Therefore, secondary The outflux 61k of liquid storage device 95 is located at the position more upper than motor axis J2.Motor 2 is generally cylindrical shaped.By making pair The lower end of liquid storage device 95 is in the position more upper than motor axis J2, and the oily O flowed out from outflux 61k can be made along motor 2 surface flow and motor 2 is cooled down.In addition, motor 2 is most wide in the horizontal direction section by motor axis J2. The lower end of secondary liquid storage device 95 is located at the position more upper than motor axis J2, to pass through along the oily O of the surface flow of motor 2 The widest region of motor horizontal direction size.Thereby, it is possible to effectively cool down to motor 2.

(the common part of the 1st oil circuit and the 2nd oil circuit)

As shown in Figure 1, oily O is supplied via the 1st oil circuit 91 and the 2nd oil circuit 92 to motor under the driving condition of motor 2 2.It supplies to the oily O of motor 2 and drops to downside while cooling down to motor 2, lodge in the area of the downside of motor chamber 81 Domain.The oily O for lodging in the region of the downside of motor chamber 81 is moved to tooth via the interval wall opening 68 for being set to spaced walls 61c Engineer room 82.

Figure 15 is the main view of the spaced walls 61c of the shell 6 from 81 side of motor chamber.

Wall opening 68 is spaced to be located at than running through the position of insertion hole 61f on the lower through insertion for axis 21.Spaced walls are opened Mouth 68 has the 1st opening portion 68a and the 2nd opening portion 68b positioned at the position more upper than the 1st opening portion 68a.1st opening portion Motor chamber 81 is connected to by 68a and the 2nd opening portion 68b with gear chamber 82 respectively.

As shown in figure 19, the lower end (the i.e., lower end of the 1st opening portion 68a) of wall opening 68 is spaced positioned at more static than motor 2 The low limit level Lmin of the liquid level of the oily O of gear chamber 82 under state upper position.Therefore, interval wall opening 68 is in motor Extremely more oily O can be made to be moved to store oil portion P under the halted state that 2 driving stops.

As shown in figure 15, the 1st opening portion 68a is round when looking down.The lower end of 1st opening portion 68a is located at than stator 30 Lower end position on the lower.1st opening portion 68a is located near the bottom 81a of motor chamber 81.Therefore, the 1st opening portion 68a Oily O is set to be moved to gear chamber 82, until lodging in the oily O substantially exhaustion in the region of downside of motor chamber 81.

It observes along the vertical direction, the 1st opening portion 68a is Chong Die with motor axis J2.In addition, the 1st opening portion 68a is located at setting In the recess portion 61q of the inner peripheral surface of peripheral wall portion 61a.Here, peripheral wall portion 61a and recess portion 61q are illustrated.The motor of shell 6 is received Portion 61 is received with peripheral wall portion 61a, cylindrical shape of the peripheral wall portion 61a with the outer peripheral surface along stator 30.Peripheral wall portion 61a's Inner peripheral surface is provided with the recess portion 61q being recessed towards radial outside.Recess portion 61q is axially extended.Recess portion 61q is located at motor axis The underface of J2.That is, recess portion 61q is Chong Die with motor axis J2 when observing along the vertical direction.Peripheral wall portion 61a has cylindrical shape, Therefore the oily O in motor chamber 81 flows and comes together in the inside of recess portion 61q along the inner peripheral surface of peripheral wall portion 61a.1st opening portion 68a is located at recess portion 61q, therefore the oily O come together in the motor chamber 81 inside recess portion 61q can be effectively moved to gear chamber 82。

2nd opening portion 68b is located at the position more upper than the 1st opening portion 68a.2nd opening portion 68b is with level when overlooking Direction is the rectangle of length direction.For 2nd opening portion 68b compared with the 1st opening portion 68a, opening area is larger.In addition, the 2nd opening Portion 68b is larger along the width of horizontal direction compared with the 1st opening portion 68a.2nd opening portion 68b has to be prolonged along horizontal direction The lower end 68c stretched.

It is driven by motor 2, from oil circuit 90 (i.e., the 1st oil circuit 91 and the 2nd oil circuit 92) supply to the oily O's of motor 2 Supply amount per unit time increases.The liquid level for lodging in the oily O in the region of the downside of motor chamber 81 as a result, rises.It is being spaced In wall opening 68, the region of the position positioned at the liquid level of the oily O than lodging in the region of the downside of motor chamber 81 on the lower is claimed For the 1st region S, the region for being located at the position more upper than liquid level is known as the 2nd region R.Wall opening 68 is spaced in the 1st region S In so that oily O is moved to gear chamber 82.When lodging in the rising of the liquid level of oily O in the region of downside of gear chamber 82, the 1st region S Area increase, the area of the 2nd region R reduces.When the area of the 1st region S increases, via interval wall opening 68 from motor chamber 81 increase to the amount of movement of the oily O of gear chamber 82.

The interval wall opening 68 of present embodiment is configured to when the liquid level of the oily O of motor chamber 81 increases, via spaced walls The amount of movement of oily O of the opening 68 from from motor chamber 81 to gear chamber 82 increases.Therefore, it can inhibit the liquid level of the oily O in motor chamber 81 It is excessively high.That is, the rotor 20 being able to suppress in motor chamber 81 is immersed in oily O or promotes oily O excessively.Therefore, it is able to suppress motor 2 rotation efficiency is reduced because of the flow resistance of oily O.

In addition, according to the present embodiment, according to the height of the liquid level of the oily O of motor chamber 81, moving the oily O in motor chamber 81 It moves to 82 side of gear chamber, so as to effectively utilize the oily O in motor unit 1.It can not only inhibit the use of oily O as a result, It measures and 1 lightweight of motor unit can be made, and the energy efficiency that the cooling that can be improved oily O is required.

As shown in figure 19, no matter how the static and driving of motor 2 is respectively positioned on and compares gear chamber for the lower end of the 2nd opening portion 68b The upper position of the height (limit level Lmin and low limit level Lmin) of the liquid level of 82 oily O.Therefore, the 2nd opening portion 68b It will not be submerged in 82 side of gear chamber.2nd liquid level of the opening portion 68b regardless of gear chamber 82, can make oily O be moved to tooth Engineer room 82, so as to inhibit rotor 20 to be immersed in oily O.

Promotion to the liquid level of the oily O with the downside for lodging in motor chamber 81, via the mobile oily O of interval wall opening 68 Amount of movement variation carry out more specific description.Here, the liquid level of the oily O of the downside of motor chamber 81 will be lodged in, reached The liquid level of the lower end 68c of 2nd opening portion 68b is as the 1st liquid level OL.That is, the lower end of the 2nd opening portion 68b is located at the 1st liquid level OL. 1st liquid level OL is located at position more upper than the lower end of stator 30 and than the lower end of rotor 20 on the lower.

Figure 16 is the relationship of the height for the liquid level of oily O for showing the downside for lodging in motor chamber 81 Yu the area of the 1st region S Curve graph.That there are correlativities is (generally proportionate for the flow of the area of 1st region S and the oily O flowed out from interval wall opening 68 Relationship).

Oily O is supplied with the driving of motor 2 to motor 2, starts the region for lodging in the downside of motor chamber 81.It lodges in The oily O in the region of the downside of motor chamber 81 is moved to gear chamber 82 from motor chamber 81 via the 1st opening portion 68a.When supply to horse Supply amount up to 2 oily O per unit time is more than the oily O for being moved to gear chamber 82 from motor chamber 81 via the 1st opening portion 68a Flow when, lodge in the oily O in the region of the downside of motor chamber 81 liquid level promoted.When liquid level reaches the 1st liquid level OL, oily O In addition to also being flowed out from the 2nd opening portion 68b other than the 1st opening portion 68a outflow.2nd opening portion 68b and the 1st opening portion 68a phase Than, it is larger along the width of horizontal direction, therefore before and after liquid level reaches the 1st liquid level OL, the area of the 1st region S sharply increases Greatly.Along with this, the flow for the oily O for flowing into gear chamber 82 from motor chamber 81 via interval wall opening 68 increased dramatically.As above Described, the 1st liquid level OL is set at the lower end position on the lower than rotor 20.Therefore, according to the present embodiment, it is able to suppress The rotation efficiency of rotor 20 in motor chamber 81 is reduced because of the flow resistance of oily O.

It is preferred that the width of the horizontal direction of the 2nd opening portion 68b is so that reaching the position more upper than the 1st liquid level OL in liquid level The flow-rate ratio of the oily O flowed out when setting from interval wall opening 68 supplies the width more than the oily O to motor 2 in oil circuit 90.As a result, can The liquid level of the oily O in the region of enough downsides for inhibiting to lodge in motor chamber 81 substantially more than the 1st liquid level OL, is able to suppress the leaching of rotor 20 In oily O.

As shown in Figure 1, the 1st oil circuit 91 includes to promote path 91d in path 91a and rotor.It promotes path 91a and passes through utilization Differential gear 5 makes oil be promoted and oily O is made to be moved to motor chamber 81 from gear chamber 82.The amount of the oily O promoted by differential gear 5 according to Rely in the revolving speed of differential gear 5.Therefore, it promotes path 91a and increases and decreases the amount of movement to the oily O of motor chamber 81 according to speed.Separately Outside, oily O by the centrifugal force of rotor 20 is sucked into 81 side of motor chamber from 82 side of gear chamber by path 91d in rotor.Centrifugal force according to Rely in the revolving speed of rotor 20.Therefore, path 91d increases and decreases the amount of movement to the oily O of motor chamber 81 according to speed in rotor.That is, 1st oil circuit 91 increases and decreases the amount of movement to the oily O of motor chamber 81 according to speed.

On the other hand, the 2nd oil circuit 92 makes oily O be moved to motor chamber 81 from gear chamber 82 by pumping (electrodynamic pump) 96.It is based on The supply amount of the oily O of pump 96 is for example controlled according to the temperature measuring result of motor 2.Therefore, the 2nd oil circuit 92 is not according to speed To increase and decrease the amount of movement to the oily O of motor chamber 81.

2nd oil circuit 92 stops to motor 2 when motor 2 is static for oil supply O.In addition, the 2nd oil circuit 92 starts in motor 2 When, start to the mobile oil O of motor chamber 81.Therefore, when stopping, the liquid level of the store oil portion P of gear chamber 82 can be increased.As knot Fruit makes the 2nd gear 42, the 3rd gear 43 and ring gear 51 in store oil portion P by the rotation of the motor 2 after just starting Rotation and oily O can be made throughout to the flank of tooth.

According to the present embodiment, the speed of the 2nd oil circuit 92 and vehicle irrelevantly lifts oily O from store oil portion P.Therefore, Even if in the case where low vehicle speeds, also the height of the pasta of store oil portion P can decline the 2nd oil circuit 92.As a result, low When driving, the rotation efficiency for the gear being able to suppress in gear chamber 82 reduces speed because of the oily O of store oil portion P.

(variation of interval wall opening)

Figure 17 is the main view of the interval wall opening 168 for the variation that can be used in the present embodiment.In addition, to The structural element of the identical mode of above embodiment, is illustrated using identical label.

The interval wall opening 168 of variation has the long hole portion 168a extended along up and down direction and long hole portion 168a's The extension 168b of upside and the long hole portion 168a wide cut connecting.The lower end of long hole portion 168a is located at the bottom 81a of motor chamber 81 Near.When observing along the vertical direction, long hole portion 168a is Chong Die with motor axis J2.Extension 168b is relative to long hole portion 168a It is wider along horizontal direction.Extension 168b is the rectangle using horizontal direction as length direction when overlooking.Extension 168b has The lower end 168c extended along horizontal direction.Lower end 168c is located at above-mentioned 1st liquid level OL.

In the wall opening 168 of interval, the 1st region S will be known as positioned at the region of the position of liquid level on the lower than oily O, it will It is known as the 2nd region R positioned at the region of the position more upper than liquid level.

Figure 18 is the height and the 1st region S for the liquid level of oily O for showing the downside for lodging in motor chamber 81 in this variation Area relationship curve graph.

In this variation, when liquid level reaches the 1st liquid level OL, oily O is other than long hole portion 168a, also from extension 168b outflow, the area of the 1st region S increased dramatically.Along with this, flowing into tooth from motor chamber 81 via interval wall opening 168 The flow of the oily O of engineer room 82 increased dramatically.1st liquid level OL is set in the lower end position on the lower than rotor 20, therefore can Inhibit the rotation efficiency of rotor 20 reduces because of the flow resistance of oily O.

(liquid level in store oil portion)

As shown in Figure 1, in the 1st oil circuit 91, under the driving condition of motor 2, pump 96 driven and by oily O from store oil Portion P is supplied to motor 2.In addition, the 1st oil circuit 91 is under the driving condition of motor 2, by the promotion of differential gear 5 make oily O from Store oil portion P is moved to the 1st liquid storage device 93, and oily O is supplied to the inside of motor 2.That is, the 1st oil circuit 91 and the 2nd oil circuit 92 are in horse Oily O is supplied from store oil portion P to motor 2 under up to 2 driving condition.Therefore, under the driving condition of motor 2, it is located at gear chamber The liquid level of the store oil portion P in the region of 82 downside declines.In addition, the oily O of supply to motor 2 lodges in the downside of motor chamber 81 Space, therefore under the driving condition of motor 2, the liquid level for lodging in the oily O in the region of the downside of motor chamber 81 is promoted.

On the other hand, under the halted state of motor 2, the 1st oil circuit 91 and the 2nd oil circuit 92 stop to motor 2 for oil supply O. Drop onto as a result, the lower section of motor 2 oily O temporarily lodge in motor chamber 81 downside region, via interval wall opening 68 and It is moved to the store oil portion P in the region of the downside of gear chamber 82.Therefore, it under the halted state of motor 2, lodges under motor chamber The liquid level of the oily O in the region of side declines, and the liquid level positioned at the store oil portion P in the region of the downside of gear chamber 82 is promoted.

Figure 19 is the side view for showing the configuration of each gear positioned at the inside of gear chamber 82.In addition, being omitted in Figure 19 Bearing that the gear incorporating section 62 of shell 6 and each axis are supported.

As shown in figure 19, according to the present embodiment, the height of the liquid level of the oily O of store oil portion P is lodged in by supplying oily O It is changed between limit level Lmax and low limit level Lmin to oil circuit 90 (the 1st oil circuit 91 and the 2nd oil circuit 92).Such as Fig. 1 institute Show, the 1st oil circuit 91 is provided with the 1st liquid storage device 93.In addition, being provided with the 2nd liquid storage device 98 and secondary liquid storage device 95 in the 2nd oil circuit 92 It (is omitted in Fig. 1, referring to Fig.1 4).In addition, in the region of the downside of the motor chamber 81 at the 1st oil circuit 91 and the 2nd oil circuit 92 interflow Accumulate oil O.In this way, being provided with multiple positions for accumulating oil O in the path of the 1st oil circuit 91 and the 2nd oil circuit 92.Pass through as a result, To motor 2 for oil supply O, the oily O for lodging in store oil portion P is moved to liquid storage device etc. in above-mentioned path, under the liquid level of store oil portion P Drop.As a result, the gear in gear chamber 82 can be made to expose and improve the rotation efficiency of gear from the oily O of store oil portion P.

As shown in figure 19, a pair of of the gear (the 2nd gear 42 and the 3rd gear 43) pivoted about with medial axis J4 In major diameter and the lower end of the 2nd gear 42 that is connect with motor 2 be located at the position on the lower limit level Lmax than liquid level.Separately Outside, the lower end of the 2nd gear 42 is located at the position more upper than the low limit level Lmin of liquid level.

Similarly, in a pair of of the gear (the 2nd gear 42 and the 3rd gear 43) pivoted about with medial axis J4 Position of the lower end of path and the 3rd gear 43 being connect with differential gear 5 positioned at the limit level Lmax than liquid level on the lower.Separately Outside, the lower end of the 3rd gear 43 is located at the position more upper than the low limit level Lmin of liquid level.

The liquid level of store oil portion P becomes limit level Lmax and refers to that motor 2 stops and stops supplying from store oil portion P to motor 2 The state of oily O.According to the present embodiment, under the halted state of motor 2, the one of the 2nd gear 42 and the 3rd gear 43 can be become Part is immersed in the state in the oily O of store oil portion P.As a result, when driving motor 2, oily O can be made immediately throughout the 2nd gear 42 With the flank of tooth of the 3rd gear 43, the transmission efficiency between gear can be improved.

The liquid level of store oil portion P becomes low limit level Lmin and refers to that motor 2 drives under high loads and most promotes from store oil portion P To motor 2 for the state of oil supply O.According to the present embodiment, under the driving condition of motor 2, the 2nd gear 42 and the 3rd gear 43 Positioned at the position more upper than the liquid level of store oil portion P, therefore it is able to suppress the flow resistance due to oily O and makes 42 He of the 2nd gear The rotation efficiency of 3rd gear 43 reduces.Thereby, it is possible to improve the drive efficiency of motor unit 1.

The ring gear for being set to differential gear 5, connecting with deceleration device 4 and being pivoted about with differential axis J5 51 in the limit level Lmax and low limit level Lmin of liquid level, and lower end is located at the position than liquid level on the lower.

According to the present embodiment, no matter how the liquid level of store oil portion P changes, and at least part of ring gear 51 is respectively positioned on The position of the liquid level of oily O than store oil portion P on the lower.Therefore, even if in the liquid level for motor 2 being driven and being made store oil portion P In the case where reduction, ring gear 51 can also be such that oily O is promoted from store oil portion P, and oily O is supplied to each gear to gear chamber 82 The flank of tooth, can be improved the transmission efficiency of the torque between each gear.

(summary of oil circuit)

Referring to Fig.1, the flowing of the oily O in the oil circuit 90 with the driving of motor unit 1 is illustrated.

In the case where motor unit 1 is equipped on hybrid vehicle or plug-in hybrid-power automobile, according to merely with Engine mode that engine is driven, the motoring mode driven merely with motor 2 and utilize engine and motor Any one mode traveling in both mixed mode driven.

In engine mode, motor 2 stops, but differential gear 5 is driven by engine, therefore oil O is from store oil Portion P is promoted.The oily O promoted lodges in the 1st liquid storage device 93, but rotor 20 does not rotate, therefore oil O does not disperse towards stator 30. In addition, pump 96 does not drive, not to the 2nd oil circuit 92 for oil supply O in engine mode.

In motoring mode and mixed mode, in the case where vehicle climbing, the output of motor 2 increases, the fever of motor 2 Amount increases.In this case, the spray volume of increasing pump 96 and supply more oil O to stator 30, to accelerate to cool down.Separately On the one hand, in the case where vehicle descending (that is, not to motor 2 apply load in the case where) such as in vehicle launch or Cold region in the case where such motor 2 not up to condition of high temperature, reduces the spray volume of pump 96 when using.

2nd oil circuit 92 can according to the temperature of motor 2, vehicle drive mode etc. and adjust supply of the pump 96 to motor 2 Amount.According to the present embodiment, the energy efficiency that the cooling of motor 2 can be made required.In the feelings for the pump that pump 96 is driven type Such effect can be played under condition.

Pump 96 spray volume management can the temperature data according to detected by the temperature sensor for being set to motor 2 come It carries out.In addition, when history run, operating condition, the posture of vehicle, extraneous gas temperature, occupant and cargo in conjunction with vehicle Each data such as weight when, can predict the temperature change of motor 2.It can be managed according to the predicted value of the temperature change, So that motor 2 does not become the condition of high temperature.

According to the present embodiment, oil circuit 90 supplies oily O to stator 30 from many places, therefore can be effectively whole to stator 30 Body is cooled down.In addition, according to the present embodiment, oily O is functioned as cooling oil and lubricating oil.It is therefore not necessary in addition set The path as cooling oil and the path as lubricating oil are set, can be realized cost effective.

(the pollutant countermeasure in oil circuit)

Oil O used in the cooling of motor unit 1 is used for the lubrication of differential gear 5 and deceleration device 4.Therefore, can worry The pollutants such as the metal powder generated by Mechanical Contact are mixed into oily O.Meeting concern of contamination object is in the 1st oil circuit 91 and the 2nd oil circuit Deteriorate the mobility of oily O in 92.Pollutant is removed by the periodic replacement of oil O.Alternatively, it is also possible in 91 He of the 1st oil circuit Either side in 2nd oil circuit 92 or both setting captures the unit of pollutant.It as an example, as shown in figure 9, can be the 2nd Liquid storage device 98 is arranged permanent magnet 98m and captures pollutant in the way of magnetic, the diffusion of contaminant restraining.In this case, It is able to suppress the deterioration of the mobility of oily O.

(configuration of each axis)

Motor axis J2, medial axis J4 and differential axis J5 are extended parallel to each other along horizontal direction.Relative to Motor axis J2, medial axis J4 and differential axis J5 are located at downside.Therefore, deceleration device 4 and differential gear 5 are located at than motor 2 position on the lower.

When from the end on observation of motor axis J2, the line segment that motor axis J2 and medial axis J4 are hypothetically linked is made For the 1st line segment L1, using the line segment that hypothetically links medial axis J4 and differential axis J5 as the 2nd line segment L2, with by motor The line segment that axis J2 and differential axis J5 hypothetically link is as the 3rd line segment L3.

According to the present embodiment, the 2nd line segment L2 extends in substantially horizontal direction.That is, medial axis J4 and differential axis J5 is arranged in generally horizontal directions.Therefore, deceleration device 4 and differential gear 5 can be made to arrange along horizontal direction, can be contracted The size of the up and down direction of fractional motor unit 1.In addition, can make the oily O promoted by differential gear 5 effectively with deceleration device 4 contacts.The transmission efficiency of gear is improved thereby, it is possible to supply oily O to the flank of tooth for the gear for constituting deceleration device 4.In addition, The diameter of the gear (the 2nd gear 42 and the 3rd gear 43) pivoted about with medial axis J4 is less than with differential axis J5 The diameter of the ring gear 51 pivoted about.According to the present embodiment, the 2nd line segment L2 prolongs in substantially horizontal direction It stretches, therefore medial axis J4 and differential axis J5 are configured in substantially horizontal direction.Therefore, according to the height of the liquid level of store oil portion P Degree, becomes that only ring gear 51 is immersed in store oil portion P, the 2nd gear 42 and the 3rd gear 43 are not immersed in state in store oil portion P.Cause This, can be such that the oily O of store oil portion P is promoted, and be able to suppress the rotation of the 2nd gear 42 and the 3rd gear 43 by ring gear 51 Transfer efficient reduces.

In addition, in the present embodiment, the 2nd line segment L2 be general horizontal direction refer to relative to horizontal direction in ± Direction within 10 °.

According to the present embodiment, angle α formed by the 2nd line segment L2 and the 3rd line segment L3 is 30 ° ± 5 °.Thereby, it is possible to make to pass through The oily O that differential gear 5 is promoted improves the transmission efficiency of the 1st gear 41 and the 2nd gear 42, and can be realized desired gear Than.

When angle α is more than 35 °, it is not easy to extremely carry out the oil supply promoted by differential gear centered on motor axis The gear (the 1st gear) of rotation.It can worry that the transmission efficiency between the 1st gear and the 2nd gear reduces as a result,.On the other hand, when When making angle α less than 25 °, it is unable to fully increase the gear of the outlet side in transmission process, in 3 axis (motor axis, medial axis And differential axis) in be difficult to realize desired gear ratio.

According to the present embodiment, the 1st line segment L1 extends along substantially vertical direction.That is, motor axis J2 and medial axis J4 is arranged along substantially vertical direction.Therefore, motor 2 and deceleration device 4 can be made to arrange along vertical direction, horse can be reduced Up to the size of the horizontal direction of unit 1.In addition, motor drive shaft can be configured to by making the 1st line segment L1 along substantially vertical direction Line J2 can utilize differential dress to the 1st gear 41 supply pivoted about with motor axis J2 close to differential axis J5 Set the oily O of 5 promotions.Thereby, it is possible to improve the transmission efficiency of the 1st gear 41 and the 2nd gear 42.

In addition, in the present embodiment, the 1st line segment L1 refer to along substantially vertical direction be in relative to vertical direction ± Direction within 10 °.

Length L1, the length L2 of the 2nd line segment and the length L3 of the 3rd line segment of 1st line segment meet relationship below.

L1:L2:L3=1:1.4~1.7:1.8~2.0

In addition, from reduction ratio of the motor 2 into the deceleration mechanism of differential gear 5 be 8 or more and 11 or less.

According to the present embodiment, motor axis J2, medial axis J4 and differential shaft as described above can be maintained on one side The positional relationship of line J5 realizes desired gear ratio (8 or more and 11 or less) on one side.

< halting mechanism >

Figure 20 is the figure for showing the halting mechanism 7 that can be used in the motor unit 1 of present embodiment.

Halting mechanism 7 is effective in the case where motor unit 1 is used for electric car (EV).

In the hand gear vehicle driven using engine, other than acting side brake, also by speed changer It is set in the position other than neutral gear, so as to bring the effect of braking to engine application load.In fluid drive vehicle, Other than acting side brake, gear lever is also set in parking position, so as to lock speed changer.

On the other hand, in electric car, other than side brake, do not apply the arrestment mechanism of braking to vehicle, Therefore halting mechanism 7 is needed in motor unit 1.

Halting mechanism 7 includes: cricoid parking gear 71, park pawl 72, parking bar 73 and parking operation bar 74.It stays Skiving wheel 71 is configured to coaxial with the 42 and the 3rd gear 43 of the 2nd gear (intermediate gear) and intermediate gear.Parking gear 71 is fixed In jackshaft 45.There is park pawl 72 protrusion 72a, protrusion 72a to bite the slot of parking gear 71 and prevent park tooth The rotation of wheel 71.Parking bar 73 is connect with park pawl 72, makes protrusion 72a moving radially along parking gear.Parking behaviour Make bar 74 to connect with parking bar 73, parking bar 73 is driven.

When motor 2 acts, park pawl 72 is kept out of the way from parking gear 71.On the other hand, parking is in gear lever When position, park pawl 72 bites parking gear 71 and prevents the rotation of parking gear 71.

The control of park pawl 72 stays motor for automobile (illustration omitted) Lai Jinhang by what is connect with parking operation bar.When making With when in motor for automobile, 7 motorized of halting mechanism can be made, therefore be able to use the structure member letter in driving halting mechanism 7 Slightly change.In addition, park pawl 72 can be made to drive by being pushed into button or plectrum bar etc., therefore when using when in motor for automobile Improve the operability of driver.Such mechanism is known as line traffic control shifting system.

In addition, also can replace the electrodynamic type for having used line traffic control shifting system in halting mechanism 7, and use hand. Park pawl is driven with line that parking operation bar is connect that is, driver can mechanically stretch.

According to the present embodiment, halting mechanism 7 is set to jackshaft 45.As a result, from motor 2 to the torque of axle 55 In transmission process, compared in the case where halting mechanism 7 are arranged by the gear of back segment than jackshaft, it can reduce for preventing to stay The braking torque of the rotation of skiving wheel 71.Thereby, it is possible to realize the construction miniaturization and lightweight for making halting mechanism.In addition, Make in the DYN dynamic situation of halting mechanism 7, can be used as using small-sized motor and stay motor for automobile.In addition, making parking machine In the case that structure is hand, the burden of the operation of driver can reduce.

In addition, according to the present embodiment, halting mechanism 7 is located at the downside of deceleration device 4.Therefore, park pawl 72 becomes The state being immersed in the oily O of store oil portion P accompanies oily O between parking gear 71 and the protrusion 72a of park pawl 72, thus The handling of protrusion 72a can successfully be carried out.

In addition, as an example of the halting mechanism 7 of present embodiment, it can also be using other known constructions.In addition, staying Mechanism of car 7 also can be configured to act on brake force to the axis 21 or ring gear 51 connecting with motor 2.

1 > of < variation

< cutting mechanism >

Figure 21 is the partial sectional view for showing the cutting mechanism 107 of motor unit 101 of variation 1.

Change as variation 1, to having cutting mechanism 107 in the drive path from motor 2 to the torque of axle 55 The motor unit 101 of shape example is illustrated.The main difference of the motor unit 101 of this variation is the axis 121 in motor 2 It is provided with cutting mechanism 107.In addition, to the structural element of mode identical with above embodiment, using identical label into Row explanation.

Cutting mechanism 107 is equipped on hybrid vehicle (HEV) and plug-in hybrid-power automobile in motor unit 101 (PHV) it is configured in the case where.In hybrid vehicle, plug-in hybrid-power automobile, according to merely with engine into The engine mode of row driving, the motoring mode driven merely with motor 2 and using both engine and motor into Any one mode traveling in the mixed mode of row driving.Cutting mechanism 107 is in the automobile travelled according to engine mode In the way of making the motor 2 in stopping not become load, by the power drive mechanism (rotor of motor 2 of motor unit 101 20, deceleration device 4, differential gear 5) it is cut off from axle 55.

As shown in figure 21, in this variation, axis 121 has the 1st axle portion 121A arranged on the same axis, connection axle portion 121C and the 2nd axle portion 121B and the cutting mechanism 107 between connection axle portion 121C and the 2nd axle portion 121B.1st axle portion 121A, connection axle portion 121C and the 2nd axle portion 121B are axially arranged successively.That is, connection axle portion 121C is located at the 1st axle portion 121A Between the 2nd axle portion 121B.

Axis 121 is to be internally provided with the hollow shaft with the hollow portion 122 along the motor axis J2 inner peripheral surface extended. Hollow portion 122 includes positioned at the 1st hollow portion 122A of the inside of the 1st axle portion 121A, positioned at the 2nd of the inside of the 2nd axle portion 121B the Hollow portion 122B and positioned at connection axle portion 121C inside the 3rd hollow portion 122C.1st hollow portion 122A, the 2nd hollow portion 122B and the 3rd hollow portion 122C are axially arranged side by side and interconnected.

1st axle portion 121A is configured at the motor chamber 81 of storage space 80.The diameter that 1st axle portion 121A is located at stator 30 is inside Side penetrates through rotor core 24 along motor axis J2.

1st axle portion 121A has the 1st end 121e positioned at outlet side (i.e., 4 side of deceleration device).

1st end 121e is inserted into hole 61f by being set to running through for spaced walls 61c from 81 side of motor chamber.1st hollow portion (second recesses) 122A is open in the face axially of the 1st end 121e.1st end 121e by with spaced walls 61c towards horse Up to 81 side of room face contact and the 1st bearing 89 that keeps rotatably support.

By make the 1st bearing 89 and spaced walls 61c towards 81 side of motor chamber face contact and keep, can be in shell 6 81 side of motor chamber position carry out the 1st axle portion 121A axis alignment.Thereby, it is possible to carry out with high precision relative to stator 30 The axis of 1 axle portion 121A is aligned.

Connection axle portion 121C is configured at through the inside of insertion hole 61f.Axle portion 121C is connected by the direction with spaced walls 61c The face contact of 82 side of gear chamber and the 2nd bearing 188A kept is rotatably supported.2nd bearing 188A is ball bearing.Even Spindle portion 121C is provided with the step surface 121q towards the side spaced walls 61c.Step surface 121q and the inner ring of the 2nd bearing 188A connect Touching.

According to this modification, the 2nd bearing 188A is held in the face towards 82 side of gear chamber of spaced walls 61c.Therefore, exist After the axis alignment for having carried out the 1st axle portion 121A, connection axle portion 121C can be assembled in the 1st axle portion 121A.Therefore, can make The assembling procedure for connecting axle portion 121C simplifies.

The outer diameter of 2nd bearing 188A is greater than the outer diameter of the 1st bearing 89.When cutting mechanism 107 acts, to the 2nd bearing 188A applies very big load along the axial and circumferential directions.The 2nd bearing 188A according to this modification, due to itself and 89 phase of the 1st bearing Than for major diameter, thus load when being acted for cutting mechanism 107, it can be ensured that sufficient intensity.

Connecting axle portion 121C has the 2nd end 121f, the 3rd end 121g and attachment flange portion 121h.

2nd end 121f is prominent to 81 side of motor chamber.2nd end 121f is located at the 1st side axle portion 121A, with the 1st axle portion The 1st end 121e of 121A links.2nd end 121f is accommodated in the 1st hollow portion 122A in the 1st end 121e opening.2nd end The outer peripheral surface of portion 121f is chimeric with the inner peripheral surface of the 1st hollow portion 122A.It is chimeric with the 1st hollow portion 122A by the 2nd end 121f, The linking part of the 1st end 121e and the 2nd end 121f can be made to minimize radially.Thereby, it is possible to ensure in the 1st end The radial outside of 121e configures the space of the 1st bearing 89.

3rd end 121g is prominent to 82 side of gear chamber.3rd end 121g is located at the opposite side as the 2nd end 121f 2nd side axle portion 121B.The end axially of 3rd end 121g is provided with the 1st recess portion 121p.

Attachment flange portion 121h extends to the radial outside of the 3rd end 121g.The diameter ratio of attachment flange portion 121h runs through The smallest part of diameter for being inserted into hole 61f is big.

According to this modification, connection axle portion 121C is seperated component with the 1st axle portion 121A.Therefore, in the assembling work of motor 2 After sequence, connection axle portion 121C is assembled to the 1st axle portion 121A, so as to according to the case where no cutting mechanism 107 The identical sequence of assembling sequence is assembled.Along with this, the shape of the component other than axis 121 can be made and do not have cutting mechanism 107 the case where, is identical.That is, according to this modification, in the motor unit 101 with cutting mechanism 107 and not having cutting mechanism Between 107 motor unit 1, the common of component can be realized.In addition, no matter whether there is or not cutting mechanisms 107, can make to assemble It is sequentially identical, therefore it is able to suppress the complication of component shape or the increase of number of components.Therefore, according to this modification, can The motor unit 101 of the high and low cost of versatility is provided.

2nd axle portion 121B is configured at the gear chamber 82 of storage space 80.

2nd axle portion 121B has the 4th end 121i and the 5th end 121j.

4th end 121i is located at the 3rd end side 121g of connection axle portion 121C.4th end 121i with connect axle portion 121C Attachment flange portion 121h the transmission of power is selectively cut off by cutting mechanism 107.

4th end 121i is accommodated in the 1st recess portion 121p that the 3rd end 121g is arranged in.At the 3rd end 121g and the 4th end The radial gap setting of portion 121i has needle bearing (bearing) 121n.That is, according to this modification, the 2nd axle portion 121B is at the 4th end Portion 121i is connected axle portion 121C and rotatably supports.Therefore, according to this modification, passing through cutting mechanism 107 for the 2nd axis In the case that portion 121B and connection axle portion 121C is cut off, opposite rotation is not hindered and can be realized stable holding.In addition, this The effect of sample is when the either side in the 3rd end 121g and the 4th end 121i is provided with storage via needle bearing 121n The effect that can be played in the case where the 1st recess portion of another party.

In this variation, needle bearing 121n be columned component be annularly configured with it is multiple made of, but can also To replace needle bearing 121n but other Bearning mechanisms such as ball bearing.But by using needle bearing, the 3rd can be reduced The radial dimension of end 121g and the 4th end 121i can be realized the miniaturization of motor unit 101.

As described above, being respectively arranged with and prolonging along axial direction in the 1st axle portion 121A, connection axle portion 121C and the 2nd axle portion 121B The hollow portion 122 stretched and be interconnected.In the same manner as above embodiment, hollow portion 122 is supplied from the 2nd side axle portion 121B court Cooling oily O is carried out to the inside of motor to the 1st side axle portion 121A.

According to this modification, connection axle portion 121C and the 2nd axle portion 121B is via needle bearing 121n connection.Therefore, can It is connected with each other the 2nd hollow portion 122B for connecting the 3rd hollow portion 122C and the 2nd axle portion 121B of axle portion 121C.Thereby, it is possible to right Hollow portion 122 is used for oil supply O as oil stream road.

5th end 121j is located at the opposite side of the 4th end 121i.5th end is held in the 3rd bearing 188B branch of shell It holds to rotate freely.That is, the 2nd axle portion 121B is supported in the 5th end 121j by the 3rd bearing 188B.

According to this modification, two bearings (needle bearing 121n and the 3rd axis that the 2nd axle portion 121B is arranged in the axial direction Hold 188B) bearing.Similarly, two bearings (the 2nd bearing 188A and needle bearings that connection axle portion 121C is arranged in the axial direction 121n) support.The two o'clock that 2nd axle portion 121B and connection axle portion 121C are arranged in the axial direction rotatably supports, so as to It is enough not generate axle offset and be stably rotated.

The outer peripheral surface of 2nd axle portion 121B is provided with the 1st gear 41.1st gear 41 is located at the 4th end 121i and the 5th end Between portion 121j.1st gear 41 transmits power to the 2nd gear 42 of deceleration device 4.According to this modification, the 1st gear 41 is located at Between 2nd bearing 188A and the 3rd bearing 188B.Therefore, the 1st gear 41 can be stably rotated relative to motor axis J2, energy Enough the 2nd gear 42 will be steadily driven to using torque caused by motor 2.

Cutting mechanism 107 surrounds the attachment flange portion 121h's and the 2nd axle portion 121B for connecting axle portion 121C from radial outside 4th end 121i.Cutting mechanism 107 switches attachment flange portion 121h and the 4th end 121i using driving portion 175 and is not mechanically linked State and both connection state.

Cutting mechanism 107 is presented axially between the axial end face of motor 2 and the 1st gear 41.Motor unit 101 uses 3 axis configurations of motor axis J2, medial axis J4 and differential axis J5.In addition, the 3rd gear 43 is located at motor in the axial direction Between 2 axial end face and the 1st gear 41.In addition, the rotation synchronous with the 2nd gear 42 for being connected to the 1st gear 41 of the 2nd gear 42 Turn.The gap bigger than the thickness of the 3rd gear 43 is provided between the axial end face and the 1st gear 41 of motor 2.According to this deformation Example, cutting mechanism 107 is configured between the axial end face of motor 2 and the 1st gear 41.That is, the 3rd gear 43 and cutting mechanism 107 are configured at the position being overlapped in the axial direction.Thereby, it is possible to efficiently use the inner space of gear chamber 82, so as to realize The miniaturization of motor unit 101.

According to this modification, cutting mechanism is set to the axis 121 of motor 2.That is, from motor 2 to the power of axle 55 In drive path, the smallest part of torque is provided with cutting mechanism 107.According to this modification, it is passed via cutting mechanism 107 Dynamic torque is smaller, therefore cutting mechanism can be made to minimize.

The cutting mechanism 107 of this variation is referred to as rotosyn or synchromesh mechanism.In addition, in this variation In, as an example of cutting mechanism 107.As cutting mechanism, such as can be using claw-type clutch mechanism or multistage clutch mechanism.

Cutting mechanism 107 includes sleeve 171, clutch hub 172, synchronous ring 173, key 174 and driving portion and (saves sketch map Show).

Clutch hub 172 is fixed on the outer peripheral surface of the 2nd axle portion 121B.Clutch hub 172 is together with the 2nd axle portion 121B with horse It is pivoted about up to axis J2.The periphery of clutch hub 172 is provided with external spline.

Sleeve 171 can move in the axial direction.Sleeve 171 is engaged with the external spline of clutch hub 172, with sleeve 171 It rotates together.In addition, the inner peripheral surface in sleeve 171 is provided with spline.The spline of sleeve 171 clutch hub 172 with connect After flange part 121h synchronous rotary, it is embedded in the spline for being set to the outer peripheral surface of attachment flange portion 121h.As a result, by the 2nd axis Portion 121B and connection axle portion 121C connection.

Key 174 is held in sleeve 171.Key 174 is axially moveable together with sleeve 171.Key 174 makes to be respectively arranged at sleeve 171 is consistent with the phase of the spline of attachment flange portion 121h.

Synchronous ring 173 is axially moveable together with sleeve 171.Synchronous ring 173 has with close to attachment flange portion 121h Side and the conical surface for making internal diameter become larger.On the other hand, it is provided in attachment flange portion 121h axially prominent to synchronous 173 side of ring Protrusion.The conical surface opposed with synchronous ring 173 is provided on protrusion.Synchronous ring 173 and attachment flange portion 121h passes through mutual The conical surface be in contact with each other and synchronous rotary.

The driving portion of illustration omitted is connect with sleeve 171.Driving portion is axially moveable sleeve 171.

Figure 22 is the schematic diagram for showing the state for connecting motor 2 and deceleration device 4 by cutting mechanism 107, Tu23Shi The schematic diagram for the state for being cut off motor 2 and deceleration device 4 by cutting mechanism 107 is shown.

As described above, the motor unit 101 with cutting mechanism 107 is equipped on hybrid vehicle or plug-in mixing is dynamic Power automobile.In such vehicle, when the mode according to the power traveling merely with engine and the power using motor 2 are gone When the mode sailed switches over, driving portion 175 acts and switches the connection and cutting of connection axle portion 121C and the 2nd axle portion 121B.

Control relevant to cutting mechanism 107 is illustrated.Cutting mechanism 107 is switching to connection shape from dissengaged positions When state, first according to the revolving speed of axle 55, the revolving speed of the 2nd axle portion 121B is calculated.Then, the revolving speed of motor 2 is made to rise to institute The revolving speed of calculated 2nd axle portion 121B.During the revolving speed of motor 2 rises, keep sleeve mobile by driving portion 175, from And realize the 2nd axle portion 121B and the connection that connect axle portion 121C.Then, according to the accumulation revolving speed of driving portion 175, completion is calculated The position of 2nd axle portion 121B and the connection for connecting axle portion 121C.Finally, the revolving speed of detection motor 2 and the revolving speed according to axle 55 The revolving speed of calculated 2nd axle portion 121B is identical, finally judges that engagement state is completed.

< controls >

The motor 2 of motor unit 1, pump 96, the driving portion 175 of cutting mechanism 107 and halting mechanism 7 stay motor for automobile Pass through micro-control unit (MCU) etc. each element one-dimensionally to control.Micro-control unit can be integrally provided with motor unit 1, It can be set in outside.

Mountability > of the < to vehicle

Motor unit 1 can be applied to hybrid vehicle (HEV), plug-in hybrid-power automobile (PHV), electric car (EV) any one in.In addition, motor unit 1 is not limited to passenger car, lorry (truck) etc. can also apply to.Motor unit 1 can be equipped on any side in the front side and rear side of vehicle, preferably be equipped on rear side.The motor unit 1 of present embodiment Up and down direction size it is smaller, therefore even if deposited in installation space due to the restriction of cargo room and minimum ground clearance In the rear side of limitation, can also be disposed compactly.

More than, embodiments of the present invention and variation are illustrated, but each structure in embodiment and they Combination etc. as an example of, without departing from the spirit and scope of the invention, be able to carry out structure it is additional, omit, displacement and Other changes.It is limited in addition, the present invention is not carried out mode.

Label declaration

1,101: motor unit (Vidacare corp)；2: motor；4: deceleration device；5: differential gear；6: shell；6a: Wall portion；20: rotor；21,121: axis；21A, 121A: the 1st axle portion；21B, 121B: the 2nd axle portion；21c: flange part；21c: flange Portion's (cover)；21d: threaded portion；21e, 121e: the 1st end；21f, 121f: the 2nd end；21g, 121g: the 3rd end；21h, 121i: the 4 end；22,122: hollow portion；22A, 122A: the 1st hollow portion；22q: the 2 region (path hollow portion)；22r: the 3 Region (major diameter hollow portion)；22t: the 2 step surface (step surface)；22u: groove；23: intercommunicating pore；24: rotor core；24a: axis To end face；24b: outer peripheral surface；24d: magnet retaining holes；24e: iron core through hole；25: rotor magnet；26,126,226: end plate； 26a, 126a, 226a: the 1st face；26b, 126b, 226b: the 2nd face；26e, 126u: inclined surface；26f, 61j, 61q: recess portion；26j, 126j, 226j: the 1st groove (the 1st recess portion)；26k, 126k, 226k, 226kA, 226kB: the 2nd groove (second recesses)；26p, 126p, 226p: plate through hole；26r: the 2 opening portion (opening portion)；26s: the 1 opening portion (opening portion)；26t: oil stream road；28: Washer (cover)；29: nut；30: stator；31: coil；31a: end turn；32: stator core；41: the 1 gears；42: the 2 Gear (intermediate gear)；43: the 3 gears；51: ring gear；61: motor incorporating section；61c: spaced walls；61f: through insertion Hole；61k, 97b, 98r, 98o, 98x, 98t, 98u, 98v, 198c: outflux；63: closure；63d: protruding portion；64: gear chamber Top (top)；65: protrusion；66: eaves portion；68,168: interval wall opening；68a: the 1 opening portion；68b: the 2 opening portion；80: Storage space；81: motor chamber；82: gear chamber；88, the 188A: the 2 bearing；89: the 1 bearings；90: oil circuit；91: the 1 oil circuits (oil Road)；91a: path is promoted；91b: axis feed path (oil stream road)；92: the 2 oil circuits (oil circuit)；92a: the 1 flow path；92b: the 2 Flow path；92c, 92aa, 92ba, 92ca: the 1st end；92ab, 92bb, 92cb: the 2nd end；97c: the 3 flow path；93: the 1 liquid storages Device (liquid storage device)；95: secondary liquid storage device；96: pump (electrodynamic pump)；96a: suction inlet；97: cooler；98,198: the 2 liquid storage devices are (main Liquid storage device)；98y: spilling portion；99: supply unit；107: cutting mechanism；121C: connection axle portion；121h: attachment flange portion；121j: 5th end；121n: needle bearing (bearing)；121p: the 1 recess portion；121q: step surface；126r, 226r: opening portion；128, 228: cover；168a: long hole portion；168b: extension；98gC: weir；J2: motor axis；J4: medial axis；J5: differential axis； L1: the 1 line segment；L2: the 2 line segment；L3: the 3 line segment (imaginary line)；Lmax: limit level；Lmin: low limit level；O: oil；OL: 1st liquid level；P: store oil portion；S: the 1 region.

Claims

1. a kind of motor unit, includes

Motor has the rotor pivoted about with motor axis；

Deceleration device is connect with the motor, has the intermediate gear pivoted about with medial axis；

Differential gear is connect with the deceleration device, has the ring gear pivoted about with differential axis；

Shell is provided with the storage space for storing the motor, the deceleration device and the differential gear；

Oil lodges in the region on the downside of the vertical direction of the storage space；And

Oil circuit, from the vertical direction of the storage space on the downside of regional guidance described in oil and by the oil supply to the horse It reaches,

The shell has the top positioned at the surface of the deceleration device and the differential gear,

At least part of the ring gear is located at the institute in the region on the downside of the vertical direction than lodging in the storage space The position of the liquid level of oil on the lower is stated,

The motor axis, the medial axis and the differential axis are extended parallel to each other along horizontal direction,

The medial axis and the differential axis are located at downside relative to the motor axis,

When along the end on observation of the motor axis, the top and hypothetically link the motor axis and the differential shaft The imaginary line of line is substantially parallel.

2. motor unit according to claim 1, wherein

It is provided with liquid storage device in the storage space, which is located at institute in the upside of the ring gear in the horizontal direction It states between motor axis and the differential axis, upward side opening, receives the oil that the ring gear is promoted.

3. motor unit according to claim 2, wherein

The top has positioned at upside and downward the side protrusion outstanding of the liquid storage device.

4. motor unit according to claim 2 or 3, wherein

The top have with from upside towards downside and it is inclined from the differential shaft line side towards the motor axis side The eaves portion of plate,

The lower end of the eaves portion is located at the upside of the liquid storage device.

5. according to motor unit described in any one in claim 2~4, wherein

The liquid storage device has bottom, the 1st sidewall portion and the 2nd sidewall portion axially extended,

1st sidewall portion extends from the end of the differential shaft line side of the bottom to upside,

2nd sidewall portion extends from the end of the motor drive shaft line side of the bottom to upside,

Position of the height of the upper end of 1st sidewall portion positioned at the upper end than the 2nd sidewall portion on the lower.

6. motor unit according to claim 5, wherein

2nd sidewall portion is tilted with towards upside to the motor axis.

7. motor unit according to any one of claims 1 to 6, wherein

When along the end on observation of the motor axis, when will hypothetically link the line of the medial axis and the differential axis When 2 line segment of Duan Zuowei, the 2nd line segment extends along the direction relative to horizontal direction within ± 10 °.

8. motor unit according to any one of claims 1 to 6, wherein

When along the end on observation of the motor axis,

When will hypothetically link the line segment of the motor axis and the medial axis as the 1st line segment, will hypothetically link institute State the line segment of medial axis and the differential axis as the 2nd line segment, will hypothetically link the motor axis and described differential When the line segment of axis is as 3 line segment,

2nd line segment extends in substantially horizontal direction,

Angle formed by 2nd line segment and the 3rd line segment is 30 ° ± 5 °.

9. motor unit according to claim 8, wherein

1st line segment extends along substantially vertical direction.

10. motor unit according to claim 9, wherein

1st line segment extends along relative to direction of the vertical direction within ± 10 °.

11. according to motor unit described in any one in claim 8~10, wherein

Length L1, the length L2 of the 2nd line segment and the length L3 of the 3rd line segment of 1st line segment meet below Relationship,

L1:L2:L3=1:1.4~1.7:1.8~2.0.

12. motor unit described in any one according to claim 1~11, wherein

In deceleration mechanism is 8 or more and 11 or less from the motor to the reduction ratio of the differential gear.

13. motor unit described in any one according to claim 1~12, wherein

The liquid storage device positioned at the storage space is provided in the path of the oil circuit,

The oil circuit includes

Oil stream road guides the oil to the motor from the liquid storage device；And

Path is promoted, by the rotation of the ring gear by the region on the downside of the vertical direction for lodging in the storage space The oil promoted and receive the oil using the liquid storage device.

14. motor unit described in any one according to claim 1~13, wherein

The height of the liquid level of the oil in the region lodged on the downside of the vertical direction of the storage space is supplied to because of the oil It is changed between limit level and low limit level to the oil circuit,

At the limit level of the liquid level, the lower end of the intermediate gear and the ring gear is located on the lower than the liquid level The position of side,

At the low limit level of the liquid level, the lower end of the intermediate gear is located at the position more upper than the liquid level, described The lower end of ring gear is located at the position than the liquid level on the lower.