WO2019077996A1 - Drive device - Google Patents

Drive device Download PDF

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Publication number
WO2019077996A1
WO2019077996A1 PCT/JP2018/036894 JP2018036894W WO2019077996A1 WO 2019077996 A1 WO2019077996 A1 WO 2019077996A1 JP 2018036894 W JP2018036894 W JP 2018036894W WO 2019077996 A1 WO2019077996 A1 WO 2019077996A1
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WO
WIPO (PCT)
Prior art keywords
motor
cover
output shaft
drive device
unit
Prior art date
Application number
PCT/JP2018/036894
Other languages
French (fr)
Japanese (ja)
Inventor
渡邉　哲也
龍之 齋藤
陽平 増田
里美 渡邊
Original Assignee
株式会社ミツバ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018100946A external-priority patent/JP7078455B2/en
Application filed by 株式会社ミツバ filed Critical 株式会社ミツバ
Priority to CN201880066981.6A priority Critical patent/CN111213305B/en
Priority to US16/756,126 priority patent/US11355990B2/en
Publication of WO2019077996A1 publication Critical patent/WO2019077996A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Definitions

  • the present invention relates to a drive device.
  • the present application claims priority based on Japanese Patent Application No. 2017-200265 filed in Japan on October 16, 2017, and Japanese Patent Application No. 2018-100946 filed in Japan on May 25, 2018. , The contents of which are incorporated herein.
  • an in-wheel motor in which a motor is housed in a rim portion of the wheel is known in order to improve transmission efficiency.
  • a wheel is fixed to the output shaft (rotation shaft) of a motor, and there exist some which a wheel and a shaft rotate together (for example, refer patent document 1).
  • the output shaft of the motor protrudes from the motor case (motor casing), and dust, rain water and the like easily enter from between the motor case and the output shaft.
  • a so-called motor with a reduction gear in which the driving unit decelerates and outputs the rotation of the motor and the motor, there is a possibility that a problem may occur if dust or rain water infiltrates the reduction gear.
  • the present invention provides a drive device excellent in dust resistance and water resistance.
  • a drive device includes a motor unit having a motor case whose diameter is gradually reduced along a level difference toward one direction, and the most of the motor case
  • a decelerating portion disposed on the one side and having an output shaft for decelerating and outputting the output of the motor portion, and a rotation disposed on the one side with respect to the decelerating portion and connected to the output shaft for rotation
  • a waterproof cover formed so as to surround the periphery of the motor case is provided on at least one of the motor unit and the rotating body, and an inner peripheral surface of the waterproof cover is the motor case It is formed in the shape of a step along the outer peripheral surface of.
  • the motor case is formed so as to gradually decrease in diameter as it goes in one direction (the rotating body side).
  • the inner peripheral surface of the waterproof cover in a stepped shape along the outer peripheral surface of the motor case, the gap between the motor case and the waterproof cover can be formed in a complicated shape. In other words, it is possible to complicate the invading route of dust, rain water and the like between the motor case and the waterproof cover. For this reason, even if it is a drive device which has a motor part and a reduction gear part, it can prevent certainly that dust and rain water infiltrate into a reduction gear part, and can provide a drive device excellent in dust resistance and waterproofness.
  • the rotating body is a wheel, and a disc-shaped disc portion fixed to the output shaft; And a rim portion extending along the axial direction of the output shaft from the outer peripheral portion of the output shaft, and a tire is mounted on the rim portion, and the disk portion is provided with a rib surrounding the periphery of the motor portion; , Said waterproof cover.
  • the rib can prevent dust, rain water, and the like from being directly applied to the motor unit. For this reason, the drive device excellent in dust resistance and waterproofness can be provided. Since it is not necessary to separately provide a cover or the like in the motor unit, the versatility of the motor unit can be enhanced, and the increase in size of the motor unit can be suppressed, and the manufacturing cost of the motor unit can be prevented from increasing.
  • the motor section is provided with a cylindrical first motor cover projecting toward the disc section, and the first motor cover is provided. At least a part of the motor cover and the rib overlap in the radial direction of the output shaft, and the first motor cover and the rib are the waterproof cover.
  • the motor cover can be miniaturized and simplified as compared with the case where the entire motor unit is covered by the motor cover. Since the labyrinth can be formed by the motor cover and the rib, it is possible to further complicate the invading path of dust, rain water, etc. which enters between the motor portion and the rib. For this reason, it is possible to provide a drive device having more excellent dustproofness and waterproofness more reliably.
  • the motor section is provided with a second motor cover, and the second motor cover is provided on the outer peripheral surface of the motor case.
  • a cover main body formed in a stepped shape along the axis, and an output shaft cover portion formed in a tubular shape so as to surround the periphery of the output shaft projected from the cover main body in the one direction.
  • the second motor cover is the waterproof cover.
  • the second motor cover in a stepped shape along the outer peripheral surface of the motor case, the space occupied by the second motor cover can be saved as much as possible, and dust and dust can be directly applied to the motor section. It is possible to prevent rainwater and the like from splashing. Therefore, it is possible to provide a drive device excellent in dust resistance and waterproofness while being miniaturized.
  • the rotating body has a seal portion covering the output shaft cover portion from the one direction side, and the seal portion And the output shaft cover portion form a labyrinth portion having an annular gap.
  • the motor unit and the speed reduction unit are arranged such that the axial direction is along the horizontal direction.
  • a draining portion is formed at a lower portion of the cover main body in the direction of gravity, and the draining portion is a draining hole formed on a side surface of the cover main body, and the water on the side surface of the cover main body
  • a box-shaped protective cover formed so as to cover the extraction hole from the radially outer side and in which one surface in the horizontal direction is opened.
  • the drainage part has a box-like protective cover so as to cover the drainage hole. Since this protective cover is open only on one side in the horizontal direction, while the rainwater is discharged smoothly to the outside through the water drainage hole, the rainwater etc. from the outside into the second motor cover from the outside through the water drainage portion. It can control that it invades. For this reason, it is possible to provide a drive device further excellent in dust resistance and waterproofness.
  • the waterproof cover can prevent dust, rain water, and the like from being directly applied to the motor unit. For this reason, the drive device excellent in dust resistance and waterproofness can be provided.
  • FIG. 2 is a partially exploded perspective view of the vehicle wheel drive device from the direction B of FIG. 1; C arrow line view of FIG. The perspective view which saw the drive wheel in 1st Embodiment of this invention from the motor side with a reduction gear.
  • FIG. 1 The perspective view which shows the state which attached the motor cover to the motor with a reduction gear in 2nd Embodiment of this invention.
  • the D section enlarged view of FIG.
  • FIG. 1 is a cross-sectional view of a vehicle wheel drive 100.
  • the vehicle wheel drive device 100 includes a motor 1 with a reduction gear, and a drive wheel 101 as a rotating body attached to an output unit 44 described later of the motor 1 with a reduction gear.
  • the vehicle wheel drive device 100 is attached to a vehicle body (not shown) and used to drive the vehicle body.
  • the motor with reduction gear 1 is disposed on the inner side in the width direction of the vehicle body so that the motor axis L of the reduction gear motor 1 is along the vehicle width direction (horizontal direction). Mounted as it is.
  • the direction along the motor axis L is simply referred to as the axial direction, or the vehicle width direction of the vehicle body
  • the direction around the motor axis L is simply referred to as the circumferential direction
  • the direction orthogonal to the motor axis L and the circumferential direction is referred to as the radial direction. May be explained.
  • FIG. 2 is a perspective view of the motor 1 with a reduction gear.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG.
  • the motor with a reduction gear 1 includes a flat motor unit 2 configured as a so-called DC brushless motor, a control unit 3 that performs drive control of the motor unit 2, and a motor unit 2. And a decelerating mechanism 4 driven by receiving a rotational force.
  • the reduction gear motor 1 is disposed side by side in the order of the control unit 3, the motor unit 2, and the reduction mechanism 4.
  • the motor unit 2 is housed in a substantially stepped cylindrical casing 10.
  • the outer peripheral surface 10a of the casing 10 is two reduced diameter portions 11a that gradually decrease in diameter via the two step surfaces 11b and 12b (the first step surface 11b and the second step surface 12b) as being separated from the control unit 3. , 12a (a first reduced diameter portion 11a, a second reduced diameter portion 12a). That is, on the outer peripheral surface 10a of the casing 10, a diameter is formed smaller than the outer peripheral surface 10a via the first step surface 11b formed closer to the control unit 3 (left side in FIG. 3) than the approximate center in the axial direction. A reduced diameter portion 11a is formed.
  • the casing 10 is provided with a second reduced diameter portion 12a which is formed to have a diameter smaller than that of the first reduced diameter portion 11a via the second step surface 12b.
  • a plurality of (for example, six in the present embodiment) bolt seats 17 that protrude radially outward and are disposed on the first step surface 11b are integrally formed.
  • the bolt seats 17 are arranged at equal intervals in the circumferential direction.
  • three bolt seats 17 are provided with female screw portions 17c for the stator on one surface (back surface) 17a on the control unit 3 side.
  • the female screw portions 17c for the stator are arranged at equal intervals in the circumferential direction.
  • the stator female screw portion 17 c is used to fasten and fix a stator 21 described later to the casing 10.
  • the external female female screw portion 17d is formed on the other surface (surface) 17b opposite to the one surface 17a.
  • These external device female screw parts 17 d are used to fasten and fix an external device (for example, a motor cover 121 in the second embodiment described later) (not shown).
  • An outer flange portion 13 projecting radially outward is integrally formed on an outer peripheral surface 10 a of the casing 10 at a side end of the control unit 3.
  • the outer flange portion 13 is for fastening and fixing the casing 10 and a control case 5 of the control portion 3 described later.
  • two plate-like mounting stays 81 are integrally formed on both sides at the center in the radial direction.
  • Each mounting stay 81 is formed so as to protrude radially outward.
  • the mounting stay 81 is for fastening and fixing the reduction gear motor 1 (the casing 10) to an external device (for example, a vehicle body not shown) (not shown).
  • the mounting stay 81 is formed with a through hole 81 a penetrating in the thickness direction. A bolt or the like (not shown) is inserted into the through hole 81a.
  • a partition wall portion 14 protruding inward in the radial direction is integrally formed in the vicinity of the first step surface 11b.
  • the casing 10 is configured as the motor storage portion 15 on the side of the control portion 3 with the substantially disk-shaped partition portion 14 extending in the radial direction interposed therebetween, and the gear storage portion 16 on the opposite side to the motor storage portion 15.
  • a substantially cylindrical bearing housing 19 is integrally formed at the radial center of the partition wall 14.
  • the bearing housing 19 is provided with a ball bearing 20 for rotatably supporting a rotor 22 described later of the motor unit 2.
  • a motor unit 2 is housed in the motor housing unit 15.
  • the motor unit 2 is configured of a substantially ring shaped stator 21 and a rotor 22 provided rotatably inward of the stator 21 in the radial direction.
  • the stator 21 has a stator core 23 formed by laminating a plurality of electromagnetic steel sheets or pressing and forming soft magnetic powder.
  • Bolt insertion holes 21 a are formed on the outer peripheral portion of the stator core 23 at positions corresponding to the female internal thread 17 c for the stator of the casing 10.
  • the bolt 26 is inserted into the bolt insertion hole 21a from the control unit 3 side (left side in FIG. 3). By screwing the bolt 26 into the female screw portion 17 c for the stator of the casing 10, the stator 21 is fastened and fixed to the motor storage portion 15 of the casing 10.
  • stator core 23 On the inner peripheral surface of the stator core 23, a plurality of teeth 24 protruding inward in the radial direction are formed in line in the circumferential direction. A coil 25 is wound around the teeth 24. Then, when power is supplied to the coil 25, a predetermined magnetic field is generated in the stator 21.
  • the rotor 22 has a rotary shaft 31 rotatably supported by the partition 14 via a ball bearing 20, a rotor core 32 externally fitted and fixed to the rotary shaft 31, and a ring magnet 33 fixed to the rotor core 32. And have.
  • the axis of the rotating shaft 31 is the motor axis L.
  • the rotating shaft 31 has a diameter slightly smaller than that of the supporting shaft 34 supported by the ball bearing 20 and the control unit 3 side end (left end in FIG. 3) of the supporting shaft 34, and extends along the axial direction It is comprised by the extended attachment axis
  • the outer diameter of the flange portion 34 a is set larger than the inner diameter of the ball bearing 20.
  • the rotor core 32 is externally fixed to the mounting shaft 35.
  • the rotor core 32 has a substantially disk-shaped core body 36 extending in the radial direction.
  • a substantially cylindrical inner circumferential wall 37 is formed in a radially central portion of the core main body 36 so as to project toward the ball bearing 20 in the axial direction.
  • the inner peripheral wall 37 is externally fitted and fixed to the support shaft 34.
  • a substantially cylindrical outer peripheral wall 38 is integrally formed along the axial direction on the outer peripheral portion of the core main body 36.
  • the axial height of the outer peripheral wall 38 is set to be slightly larger than the axial thickness of the stator core 23.
  • the entire radially inner end surface of the teeth 24 of the stator core 23 radially faces the outer peripheral wall 38 of the rotor core 32.
  • the ring magnet 33 is externally fitted and fixed to the outer peripheral surface of such an outer peripheral wall 38.
  • the ring magnet 33 is formed in a substantially cylindrical shape so as to correspond to the outer peripheral wall 38.
  • a plurality of N poles and S poles are alternately magnetized in the circumferential direction.
  • the magnet fixed to the outer peripheral wall 38 is not limited to the ring magnet 33, and may be a magnet divided in the circumferential direction. In this case, the magnetic poles are fixed to the outer peripheral wall 38 in order in the circumferential direction.
  • An eccentric shaft 41 is integrally formed along the axial direction at the end (left end) of the rotation shaft 31 at the side of the reduction mechanism 4.
  • the eccentric shaft 41 constitutes a part of the reduction mechanism 4.
  • the reduction mechanism 4 is configured as a so-called hypocycloid reduction mechanism.
  • the reduction gear mechanism 4 includes a ring gear 42 fixed to the gear storage portion 16 of the casing 10, an oscillating gear 43 engaged with the ring gear 42, and an output part engaged with the oscillating gear 43. And 44.
  • the eccentric shaft 41 is constituted by an eccentric portion 45 formed on the flange portion 34a of the rotary shaft 31, and a support shaft 46 extending along the axial direction from the end of the eccentric portion 45 opposite to the flange portion 34a.
  • the eccentric part 45 is formed in a substantially cylindrical shape.
  • the outer peripheral surface 45 a of the eccentric portion 45 is formed of a cylindrical surface whose center O is a position eccentric to the motor axis L.
  • the support shaft 46 is formed such that its axis coincides with the motor axis L.
  • the oscillating gear 43 is rotatably supported by the eccentric portion 45 via one ball bearing 47.
  • the rocking gear 43 protrudes from the radial center of the rocking gear main body 48 along the axial direction toward the opposite side to the motor unit 2 from the substantially disc-shaped rocking gear main body 48 extending in the radial direction.
  • a substantially annular recess 43a is formed as viewed from the point of view.
  • a bearing housing 49 of the oscillating gear 43 is rotatably supported by the eccentric portion 45 via a ball bearing 47.
  • outer teeth 50a are formed on the outer circumferential surface
  • inner teeth 50b are formed on the inner circumferential surface.
  • the axial center of the outer teeth 50a, the axial center of the inner teeth 50b, and the axial center of the ball bearing 47 are located on the same plane P in the radial direction.
  • An internal tooth 42 a of the ring gear 42 is engaged with the external tooth 50 a of the oscillating gear 43.
  • An outer peripheral surface of the ring gear 42 is fitted in and fixed to the gear storage portion 16 of the casing 10.
  • an internal tooth 42a concentric with the motor axis L is formed on the inner peripheral surface of the ring gear 42.
  • the external teeth 53 a of the output unit 44 are engaged with the internal teeth 50 b of the oscillating gear 43.
  • the output unit 44 has a substantially disk-shaped output unit main body 51 extending in the radial direction.
  • a bearing storage recess 52 is formed at the center in the radial direction on one surface 51 a of the output unit main body 51 on the motor unit 2 side (left side in FIG. 3).
  • the ball bearing 40 is housed in the bearing housing recess 52.
  • the support shaft 46 of the eccentric shaft 41 is rotatably supported by the output unit main body 51 via the ball bearing 40.
  • An external tooth ring 53 is formed on one surface 51 a of the output unit main body 51 so as to protrude therefrom.
  • the external gear ring 53 is formed to correspond to the recess 43 a of the oscillating gear 43.
  • the external tooth ring 53 is exposed to the recess 43a.
  • the outer teeth 53 a engaged with the inner teeth 42 a of the ring gear 42 and concentric with the motor axis L are formed on the outer peripheral surface of the outer teeth ring 53.
  • the axial center of the meshing range of the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the oscillating gear 43 substantially coincides with the axial centers of the inner teeth 42a and the outer teeth 50a.
  • the axial center of the meshing range of the internal teeth 50b of the oscillating gear 43 and the external teeth 53a of the output portion 44 substantially coincides with the axial centers of the internal teeth 50b and the external teeth 53a.
  • the axial center of the meshing range of the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the rocking gear 43, and the axial direction of the meshing range of the inner teeth 50b of the rocking gear 43 and the outer teeth 53a of the output portion 44 The center and the axial center of the ball bearing 47 are located on substantially the same plane P in the radial direction.
  • a plurality of (for example, four in the present embodiment) female screw parts 54 are engraved on the other surface 51b opposite to the one surface 51a of the output unit main body 51.
  • the female screw parts 54 fasten and fix the drive wheel 101 to the output part 44.
  • the output unit main body 51 of the output unit 44 is rotatably supported by the guide unit 56 via the ball bearing 55.
  • An inner ring 55 a of the ball bearing 55 is externally fitted to the outer peripheral surface of the output portion main body 51.
  • a bearing outer flange portion 58 projecting radially outward from an outer peripheral surface is integrally formed.
  • the guide portion 56 is configured of a guide main body 57 formed in a substantially cylindrical shape, and a flange portion 59 integrally formed so as to protrude outward in the radial direction on the outer peripheral surface 57 a of the guide main body 57.
  • the flange portion 59 abuts on the end surface of the casing 10 opposite to the control portion 3.
  • the flange portion 59 is fastened and fixed to the casing 10 by a plurality of (for example, four in the present embodiment) bolts 60.
  • the guide portion 56 is fixed to the casing 10.
  • An outer ring 55 b of the ball bearing 55 is fitted on the inner peripheral surface of the guide main body 57.
  • a bearing inner flange portion 61 projecting integrally inward in the radial direction from the inner peripheral surface is integrally formed at an end (right end in FIG. 3) opposite to the swing gear 43 of the guide main body 57.
  • the end of the ball bearing 55 on the opposite side of the rocking gear 43 of the outer ring 55b abuts on the bearing inner flange portion 61, thereby restricting the movement of the ball bearing 55 to the side opposite to the rocking gear 43.
  • Ru The ball bearing 55 is exposed to the outside through an opening on the inner peripheral edge side of the bearing inner flange portion 61.
  • the end portion of the ball bearing 55 on the swing gear 43 side abuts on the bearing outer flange portion 58 of the output portion 44.
  • the ball bearing 55 contacts the bearing inner flange portion 61 of the guide portion 56 with the end portion of the ball bearing 55 on the opposite side of the swing gear 43 of the outer ring 55 b.
  • axial positioning is performed.
  • a rib 62 which protrudes toward the oscillating gear 43 side from the outer peripheral part side is integrally formed.
  • the rib 62 is formed in a substantially annular shape in an axial plan view.
  • the ball bearing 55 provided between the respective main bodies 51 and 57 swings with the internal teeth 42 a of the ring gear 42 in the outer diameter of the output main body 51 of the output portion 44 and the inner diameter of the guide main body 57 of the guide portion 56.
  • the meshing position of the gear 43 with the external gear 50a and the meshing position of the internal gear 50b of the rocking gear 43 and the external gear 53a of the output portion 44 are set to face each other in the axial direction.
  • axially opposed does not mean that they are completely opposed in the axial direction, but the meshing position of the internal teeth 42 a of the ring gear 42 and the external teeth 50 a of the oscillating gear 43 along the axial direction It means that the meshing position of the internal teeth 50b of the moving gear 43 and the external teeth 53a of the output part 44 and the ball bearing 55 are arranged side by side.
  • a gap is formed on the radially inner side of the rib 62. That is, the meshing position of the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the rocking gear 43, the meshing position of the inner teeth 50b of the rocking gear 43 and the outer teeth 53a of the output portion 44; A gap is formed between the The gap is configured as a lubricant reservoir 63.
  • the lubricant reservoir 63 is filled with a lubricant (not shown).
  • This lubricant serves to reduce the meshing resistance between the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the rocking gear 43 and the meshing resistance between the inner teeth 50b of the rocking gear 43 and the outer teeth 53a of the output portion 44.
  • the lubricant has a role of reducing the sliding resistance of the ball bearing 55.
  • the ball bearing 55 is exposed to the outside through an opening on the inner peripheral edge side of the bearing inner flange portion 61 of the guide portion 56. For this reason, it is desirable to provide a seal at least on the surface of the ball bearing 55 on the bearing inner flange portion 61 side. This can prevent dust and the like from entering the ball bearing 55 from the outside.
  • the control unit 3 includes a bottomed cylindrical control case 5 and a control board 6 housed in the control case 5.
  • the control case 5 is disposed with the opening 5 a facing the motor unit 2.
  • an outer flange portion 71 protruding outward in the radial direction is formed.
  • An end surface 71 a of the outer flange portion 71 on the motor portion 2 side is in contact with the outer flange portion 13 of the casing 10.
  • the outer flange portion 71 of the control case 5 and the outer flange portion 13 of the casing 10 are fastened and fixed by a plurality of bolts 72 (see FIGS. 1 and 2).
  • An O-ring groove 73 is formed on the end surface 71 a of the outer flange portion 71 of the control case 5 over the entire circumference. By mounting an O-ring (not shown) in the O-ring groove 73, the sealability between the outer flange portion 71 of the control case 5 and the outer flange portion 13 of the casing 10 is secured.
  • the control case 5 has a substantially cylindrical power outlet 77 for drawing out a power harness 75 described later connected to the control substrate 6 housed in the control case 5 and a substantially cylindrical shape for drawing out the sensor harness 76.
  • the sensor outlet 78 is formed to project outward.
  • the control substrate 6 is a so-called epoxy substrate on which a plurality of conductive patterns (not shown) are formed.
  • the control board 6 is disposed such that this one surface faces the stator 21 and the rotor 22 in the axial direction.
  • a plurality of magnetic detection elements 74 are mounted on the control board 6 at positions axially opposed to the ring magnet 33 of the rotor 22. The magnetic detection element 74 detects the rotational position of the rotor 22 by detecting the magnetic change of the ring magnet 33.
  • a terminal of the coil 25 of the stator 21 is connected to the control board 6, and a sensor of a terminal of the power harness 75 connected to an external power supply (not shown) and an external control device (not shown) The terminal portion of the harness 76 is connected.
  • a capacitor (not shown) or the like for smoothing the voltage applied to the control substrate 6 is mounted on the control substrate 6.
  • a power module (not shown) formed of a switching element such as an FET (Field Effect Transistor) that controls the current supplied to the coil 25 may be mounted on the control substrate 6.
  • FIG. 4 is a partially exploded perspective view of the vehicle wheel drive device 100 from the direction B in FIG.
  • the drive wheel 101 includes a wheel 102 and a tire 103 assembled to the rim portion 105 of the wheel 102.
  • the wheel 102 has a disc portion 104 formed in a substantially disc shape concentric with the motor axis L, and a rim portion 105 projecting from the outer peripheral edge of the disc portion 104 toward the motor with reducer 1 (left side in FIG. 1). And are integrally molded.
  • the rim portion 105 is integrally formed with a substantially cylindrical rim main body 106 concentric with the motor axis L and two outer flange portions 107 a and 107 b radially projecting from both axial ends of the rim main body 106.
  • the rim main body 106 and the two outer flange portions 107a and 107b form a tire storage recess 108 whose radially outer side is opened.
  • a tire 103 is attached to the wheel 102 so as to be stored in the tire storage recess 108.
  • the concave portion 109 On one surface 104a of the disk portion 104 on the opposite side to the reduction motor 1 (right side in FIG. 1, front side in FIG. 4), the concave portion 109 substantially circular in plan view in the axial direction Is formed.
  • a bolt insertion hole 111 is formed in a radially central portion of the recess 109 at a position corresponding to the female screw portion 54 of the output portion 44 of the motor 1 with a reduction gear. The bolt 110 is inserted into the bolt insertion hole 111, and the bolt 110 is screwed into the female screw portion 54 of the output portion 44.
  • the wheel 102 is fastened and fixed to the output unit 44 in a state where the other surface 104 b opposite to the one surface 104 a of the disk unit 104 is in contact with the other surface 51 b of the output unit 44.
  • the output unit 44 and the wheel 102 rotate integrally.
  • FIG. 5 is a view on arrow C of FIG.
  • four elongated holes 112 are formed at equal intervals in the circumferential direction near the outer periphery.
  • the long holes 112 are long straight and oblong holes substantially along the circumferential direction.
  • the elongated hole 112 has a function of reducing the weight of the wheel 102 and a function as an insertion slot into which a tool such as a driver is inserted.
  • the diameter of the recess 109 is set larger than the outermost diameter of the casing 10 of the motor 1 with a reduction gear.
  • the long hole 112 and the mounting stay 81 of the casing 10 are opposed in the axial direction. Therefore, when the vehicle wheel drive device 100 is attached to a vehicle body (not shown), a bolt (not shown) can be inserted into the through hole 81 a of the mounting stay 81 via the long hole 112 from the outside in the vehicle width direction. A tool (not shown) can be inserted into the long hole 112 from the outside in the vehicle width direction, and a bolt (not shown) can be tightened.
  • a wheel cover 113 fitted to the recess 109 is provided on one surface 104 a of the disk portion 104.
  • the wheel cover 113 is fastened and fixed to the disc portion 104 by a bolt 114.
  • the wheel cover 113 covers the bolt 110 exposed in the recess 109 of the disk portion 104.
  • the long hole 112 formed in the recess 109 of the disk portion 104 is covered. For this reason, the designability of the driving wheel 101 is enhanced.
  • a substantially annular inlay portion 115 is integrally formed so as to slightly protrude in the axial direction plan view.
  • An inner peripheral edge of the inlay portion 115 is externally fitted to the output portion main body 51 of the output portion 44. Thereby, radial positioning of the wheel 102 (disk unit 104) with respect to the output unit 44 is performed.
  • FIG. 6 is a perspective view of the drive wheel 101 as viewed from the motor with reducer 1. As shown in FIGS. 1 and 6, on the other surface 104b of the disk portion 104, the first reduced diameter portion 11a of the casing 10 and the first step surface 11b of the motor with a reduction gear 1 are provided. A substantially cylindrical rib 116 projecting toward the first reduced diameter portion 11a and the first step surface 11b is integrally formed.
  • the rib 116 further extends from the outer peripheral portion of the substantially cylindrical first convex portion 117 projecting from the other surface 104 b of the disk portion 104 to just before the first step surface 11 b of the casing 10 and the casing 10 further. It projects until just before the outer flange portion 13 of the
  • the rib 116 is configured by a second convex portion 118 formed in a substantially cylindrical shape so as to cover the outer peripheral surface of the casing 10. That is, the rib 116 is formed in a stepped shape so that the shape of the inner peripheral surface corresponds to the stepped outer peripheral surface of the casing 10.
  • the inner diameter of the first convex portion 117 is set to be slightly larger than the diameter of the first reduced diameter portion 11 a of the casing 10.
  • the inner diameter of the second convex portion 118 is set to be slightly larger than the outermost diameter of the bolt seat 17 of the casing 10. For this reason, the rib 116 and the casing 10 do not interfere with each other.
  • the eccentric shaft 41 integrally formed on the rotation shaft 31 of the rotor 22 rotates.
  • the oscillating gear 43 rotates in response to the rotation.
  • the oscillating gear 43 is rotatably provided with respect to the eccentric portion 45 of the eccentric shaft 41 via a ball bearing 47, and the external gear 50 a is engaged with the internal gear 42 a of the ring gear 42.
  • the oscillating gear 43 revolves around the motor axis L, and decelerates and rotates with respect to the eccentric shaft 41 around the center O (see FIG. 3) of the eccentric portion 45.
  • the power is transmitted to the oscillating gear 43 by the output portion 44 engaged with the internal teeth 50 b of the oscillating gear 43 by the oscillating rotation of the oscillating gear 43.
  • the output unit 44 is rotated.
  • the drive wheel 101 integrated with the output unit 44 rotates.
  • a vehicle body (not shown) to which the vehicle wheel drive device 100 is attached travels. Since the outer peripheral surface of the casing 10 is covered by the rib 116 of the wheel 102, direct application of dust, rain water, etc. to the motor unit 2 is prevented.
  • a rib 116 covering the outer peripheral surface of the casing 10 is formed on the other surface 104 b of the disk portion 104 so as to protrude from the wheel 102. For this reason, it is possible to prevent the dust, rain water and the like from being directly applied to the motor unit 2. For this reason, the vehicle wheel drive device 100 excellent in dust resistance and waterproofness can be provided.
  • the ball bearing 55 of the reduction gear motor 1 is exposed to the outside through the opening on the inner peripheral edge side of the bearing inner flange portion 61, but dust, rain water, etc. intrude into the ball bearing 55 by the rib 116. It is possible to reliably prevent
  • the versatility of the motor unit 2 can be enhanced, and the motor unit 2 (motor with reduction gear 1) Can be suppressed. It is also possible to prevent an increase in the manufacturing cost of the motor unit 2 (motor 1 with speed reducer).
  • the rib 116 is formed in a stepped shape so that the shape of the inner peripheral surface corresponds to the stepped outer peripheral surface of the casing 10. For this reason, the gap between the casing 10 and the rib 116 can be formed in a complicated shape. In other words, it is possible to complicate the invading route of dust, rain water, etc. which enters between the casing 10 and the rib 116. For this reason, the vehicle wheel drive device 100 excellent in dust resistance and waterproofness can be provided.
  • the elongated hole 112 formed in the disk portion 104 of the wheel 102 and the mounting stay 81 of the casing 10 are arranged to face each other in the axial direction. Therefore, when the vehicle wheel drive device 100 is attached to a vehicle body (not shown), a bolt (not shown) can be inserted into the through hole 81 a of the mounting stay 81 via the long hole 112 from the outside in the vehicle width direction. A tool (not shown) can be inserted into the long hole 112 from the outside in the vehicle width direction, and a bolt (not shown) can be tightened. Therefore, the attachment workability of the drive wheel 101 to the reduction gear motor 1 can be improved.
  • a plurality of (for example, six in the present embodiment) bolt seats that protrude outward in the radial direction to the first reduced diameter portion 11a and are disposed on the first step surface 11b. 17 is integrally molded.
  • external female internal thread 17d is engraved on the other surface 17b where the female internal thread 17c for the stator is not engraved. doing.
  • FIG. 7 is a cross-sectional view of the drive wheel 201 of the vehicle wheel drive device 200 according to the second embodiment.
  • FIG. 8 is a perspective view showing a state in which the motor cover 121 is attached to the reduction gear motor 1.
  • the vehicle wheel drive device 200 includes a motor 1 with a reduction gear, and a drive wheel 201 attached to an output portion 44 described later of the motor 1 with a reduction gear.
  • the motor with a reduction gear 1 is also mounted such that the motor with a reduction gear 1 is disposed so that the motor axis L is along the vehicle width direction (horizontal direction) and inside the vehicle width direction of the vehicle body. It is the same as that of one embodiment.
  • the motor cover 121 is attached to the reduction gear motor 1.
  • the rib 216 of the wheel 202 in the second embodiment is formed to correspond to the shape of the motor cover 121.
  • the motor cover 121 is fastened and fixed to a bolt seat 17 (see FIGS. 2 and 3) of the motor 1 with a reduction gear by bolts 120 (see FIGS. 7 and 8).
  • the motor cover 121 includes a substantially annular fixing portion 122 fixed to the bolt seat 17, a substantially cylindrical cover main body 123 projecting toward the drive wheel 201 in the axial direction from the fixing portion 122, and a cover main body 123.
  • An inner flange portion 124 extending so as to gradually decrease in diameter diagonally inward in the radial direction from the tip end (end on the driving wheel 201, right end in FIG. 7) is integrally formed.
  • the fixing portion 122 is formed in a substantially annular shape as viewed from the axial direction so as to cover the outer peripheral surface of the step in which the bolt seat 17 is formed among the outer peripheral surfaces of the casing 10.
  • the fixing portion 122 is formed in a substantially L-shaped cross section by an outer peripheral wall 122 a and an end wall 122 b covering an axial end surface of the bolt seat 17.
  • the cover main body 123 is bent and extended from the inner peripheral edge of the end wall 122b.
  • the outer diameter of the outer peripheral wall 122 a of the fixing portion 122 is set to be substantially the same as the outer diameter of the casing 10. For this reason, the notch 122c for avoiding interference with this bolt seat 17 is formed in the position corresponding to the bolt seat 17 of the outer peripheral wall 122a.
  • a through hole (not shown) through which the bolt 120 can be inserted is formed at a position corresponding to the bolt seat 17 where the external device female screw 17 d is formed.
  • the inner diameter of the cover main body 123 is set to be slightly larger than the outer diameter of the first reduced diameter portion 11 a of the casing 10.
  • the inner flange portion 124 provided at the front end of the cover main body 123 is formed so that the diameter of the inner peripheral edge is slightly larger than the outer diameter of the guide main body 57 of the guide portion 56 provided in the reduction gear motor 1 It is done.
  • a cylindrical reinforcing rib 125 is integrally formed on the inner peripheral edge of the inner flange portion 124. The reinforcing rib 125 enhances the mechanical strength of the inner flange portion 124.
  • the rib 216 of the wheel 202 is formed in a substantially cylindrical shape so as to cover a portion of the outer peripheral surface of the motor cover 121 from the end of the reinforcing rib 125 to the end of the cover main body 123.
  • the inner circumferential surface 216 a of the rib 216 is formed to correspond to the shape from the tip of the reinforcing rib 125 of the motor cover 121 to the tip of the cover main body 123. That is, the inner circumferential surface of the rib 216 is formed so as to gradually increase in diameter as it goes from the disk portion 104 to the motor 1 with a reduction gear.
  • the motor cover 121 is provided on the casing 10 of the reduction gear motor 1, and the rib 216 of the wheel 202 is formed so as to cover a part of the outer peripheral surface of the motor cover 121.
  • a portion of the motor cover 121 and the rib 216 are arranged to overlap in the radial direction. Therefore, the labyrinth portion 126 is formed by a part of the motor cover 121 and the rib 216. Therefore, an intrusion path of dust, rain water, and the like between the casing 10 and the rib 216 can be further complicated, and a vehicle wheel drive device 200 excellent in dust resistance and water resistance can be provided.
  • the motor cover 121 of the reduction gear motor 1 and the rib 216 of the wheel 202 in combination, the motor cover 121 alone can provide a motor that is superior in dust resistance and waterproofness to the vehicle wheel drive device 200 as compared with the case of providing the motor
  • the structure of the cover 121 can be simplified, and the motor cover 121 can be miniaturized.
  • FIG. 9 is an enlarged view of a portion D of FIG.
  • the motor cover 121 includes the substantially cylindrical cover main body 123 and an inner flange extending so as to gradually decrease in diameter diagonally inward from the tip end of the cover main body 123. And a unit 124. Therefore, as shown in FIG. 9, for example, when rainwater W intrudes from the inner side in the vehicle width direction (left side in FIG. 9) of the wheel 202, the rainwater W travels along the outer peripheral surface of the motor cover 121 by its own weight and the wheel 202 And may reach the output portion 44 of the reduction gear motor 1 (see arrow Y in FIG. 9). Therefore, the motor cover 121 may be configured as a motor cover 221 in the following modification.
  • FIG. 10 is a cross-sectional view of a drive wheel 201 of a vehicle wheel drive device 200 according to a modification of the second embodiment, corresponding to FIG. 7 described above.
  • the motor cover 221 is integrally formed with a substantially annular fixing portion 222 viewed from the axial direction and a cover main body 223 projecting from the outer peripheral edge of the fixing portion 222 toward the driving wheel 201 side. It is The fixing portion 222 is fastened and fixed to the bolt seat 17 by a bolt 120.
  • the cover main body 223 is formed so as to expand in diameter while gradually curving as it goes from the outer peripheral edge of the fixed portion 222 to the drive wheel 201 side.
  • the rib 316 of the wheel 302 is disposed on the inner peripheral surface side of the motor cover 221.
  • the rib 316 is formed in a substantially cylindrical shape.
  • the outer peripheral surface 316 a of the rib 316 is curved so as to correspond to the shape of the inner peripheral surface 223 a of the cover main body 223.
  • the cover main body 223 of the motor cover 221 and the rib 316 overlap in the radial direction.
  • the cover main body 223 of the motor cover 221 is formed to widen, for example, even when rainwater W intrudes from the inner side in the vehicle width direction (left side in FIG. 10) of the wheel 302, the cover main body 223 is There is no possibility that the rainwater W may travel around the inner peripheral surface of the wheel 302 along the outer peripheral surface. For this reason, in the modification of the above-mentioned second embodiment, in addition to the same effect as the above-mentioned second embodiment, it is prevented more reliably that rain water etc. will be applied to the output part 44 of the motor 1 it can.
  • the present invention is not limited to this, and the disk portion 104 and the ribs 116, 216, and 316 may be separately configured, and the ribs 116, 216, and 316 may be attached to the disk portion 104.
  • FIG. 11 is a cross-sectional view of a vehicle wheel drive device 300 in the third embodiment.
  • the vehicle wheel drive device 300 is the same as the first embodiment described above in that the vehicle wheel drive device 300 includes the motor 1 with a reduction gear and the drive wheels 301.
  • the motor with a reduction gear 1 is also mounted such that the motor with a reduction gear 1 is disposed so that the motor axis L is along the vehicle width direction (horizontal direction) and inside the vehicle width direction of the vehicle body. Is the same as the first embodiment.
  • an attach shaft 400 is provided as a part of the output portion 44 of the motor 1 with a reduction gear.
  • the drive wheel 301 is attached to the output unit 44 via the attach shaft 400.
  • the ribs 116, 216, and 316 are not provided on the drive wheel 301 as in the first, second, and third embodiments described above.
  • the motor cover 321 is attached.
  • the attach shaft 400 has a substantially disc-like base portion 401 that is in contact with the other surface 51 b of the output portion 44 and a direction from the radial center of the base portion 401 to the opposite side to the output portion 44 And an output shaft 402 projecting along the axial direction.
  • a substantially cylindrical inlay portion 403 projecting from the one surface 401a that abuts on the other surface 51b of the output portion 44 is integrally formed.
  • An inner peripheral edge of the inlay portion 403 is externally fitted to the output portion main body 51 of the output portion 44. Thereby, radial positioning of the attach shaft 400 with respect to the output unit 44 is performed.
  • a bolt insertion hole 404 is formed in the base portion 401 at a position corresponding to the female screw portion 54 of the output portion 44.
  • One surface 401 a of the base portion 401 is in contact with the other surface 51 b of the output portion 44 by inserting the bolt 110 into the bolt insertion hole 404 and screwing the bolt 110 into the female screw portion 54 of the output portion 44
  • the attach shaft 400 is fastened and fixed to the output unit 44. Thereby, the output part 44 and the attach shaft 400 rotate integrally.
  • a counterbore portion 404a expanded in diameter by a step is formed in the bolt insertion hole 404, on the other surface 401b side opposite to the one surface 401a of the base portion 401. Since the head portion 110 a of the bolt 110 is accommodated in the counterbore portion 404 a, the head portion 110 a of the bolt 110 does not protrude from the other surface 401 b of the base portion 401.
  • the output shaft 402 projected from the base portion 401 is disposed so that the axis is coaxial with the motor axis L (the rotation axis of the output portion 44).
  • the wheel 502 of the drive wheel 301 is attached to the tip of the base portion 401.
  • Motor cover A motor cover 321 attached to the motor unit 2 is fastened and fixed to a bolt seat 17 of the motor 1 with a reduction gear by a bolt 120.
  • FIG. 12 is a perspective view of the motor cover 321.
  • the motor cover 321 has a substantially annular fixing portion 322 fixed to the bolt seat 17.
  • a pedestal 323 is formed protruding outward in the radial direction at a position corresponding to the bolt seat 17 of the motor 1 with a reduction gear.
  • a through hole 323 a through which the bolt 120 can be inserted is formed in the pedestal 323.
  • the motor cover 321 is fastened and fixed to the casing 10 by inserting the bolt 120 into the through hole 323 a and screwing the tip of the bolt 120 into the external device female screw portion 17 d of the bolt seat 17.
  • a substantially cylindrical first cylindrical portion 324 that protrudes toward the drive wheel 301 is integrally formed on the inner peripheral edge of the fixed portion 322.
  • the base end of the first cylindrical portion 324 on the fixing portion 322 side is externally fitted to the first reduced diameter portion 11 a of the casing 10.
  • the water draining portion 330 is provided on the tip end side opposite to the fixed portion 322 of the first cylindrical portion 324.
  • the water draining portion 330 is constituted by a water draining hole 331 formed in the first cylindrical portion 324, and a protective cover 332 which covers the water draining hole 331 from the outer side in the radial direction.
  • the drain hole 331 is formed in a substantially square shape as viewed in the radial direction, and communicates the inside and the outside of the first cylindrical portion 324.
  • the protective cover 332 is formed in a box shape having an opening 332 a on the motor unit 2 side (right side in FIG. 11).
  • the protective cover 332 protrudes downward from the first cylindrical portion 324, and includes three side walls 332b arranged substantially in a C shape as viewed from the direction of gravity, and a bottom wall 332c straddling lower ends of the three side walls 332b. ,have.
  • a second cylindrical portion 326 which has a diameter smaller than that of the first cylindrical portion 324 via the step surface 325, is integrally formed at the tip of the first cylindrical portion 324.
  • the inner diameter of the second cylindrical portion 326 is set larger than the outer diameter of the base portion 401 of the attach shaft 400.
  • a substantially disc-like top plate 327 is integrally formed at the tip of the second cylindrical portion 326 on the opposite side to the step surface 325.
  • One surface 327 a of the top plate 327 on the side of the base portion 401 is in contact with the other surface 401 b of the base portion 401.
  • a through hole 328 through which the output shaft 402 of the attach shaft 400 can be inserted is formed at the center of the top plate 327 in the radial direction. The tip of the output shaft 402 is protruded from the motor cover 321 through the through hole 328.
  • a third inner cylindrical portion 333 is formed which protrudes slightly radially outward from the peripheral edge of the through hole 328.
  • a third outer cylindrical portion 334 is formed on the other surface 327 b of the top plate 327 so as to project radially outward of the third inner cylindrical portion 333.
  • the protruding height of the third outer cylindrical portion 334 is set to be lower than the protruding height of the third inner cylindrical portion 333.
  • the third inner cylindrical portion 333 and the third outer cylindrical portion 334 cooperate with a seal portion 340 described later to form a labyrinth portion 343.
  • a seal portion 340 is attached to the tip end side of the output shaft 402 of the attach shaft 400.
  • the seal portion 340 constitutes a part of the wheel 502, and is formed of elastic rubber.
  • the seal portion 340 is formed to cover the third inner cylindrical portion 333 from the wheel 502 side. That is, in the seal portion 340, the disc portion 341 attached to the output shaft 402 and the seal cylindrical portion 342 projecting toward the top plate 327 of the motor cover 321 from the outer peripheral portion of the disc portion 341 are integrally formed. There is.
  • a through hole 341 a is formed at the radial center of the disc portion 341.
  • the output shaft 402 is press-fitted into the through hole 341a. Thereby, the seal portion 340 is fixed to the output shaft 402.
  • the tip of the seal cylindrical portion 342 is interposed between the third inner cylindrical portion 333 and the third outer cylindrical portion 334 of the motor cover 321.
  • a predetermined gap K1 is formed between the seal cylindrical portion 342 and the other surface 327b of the top plate 327.
  • an annular gap K2 is formed between the inner peripheral surface of the seal cylindrical portion 342 and the outer peripheral surface of the third inner cylindrical portion 333 as viewed in the axial direction.
  • an annular gap K3 is formed between the outer peripheral surface of the seal cylindrical portion 342 and the inner peripheral surface of the third outer cylindrical portion 334 as viewed in the axial direction.
  • the labyrinth portion 343 is formed between the seal portion 340 and the motor cover 321, an intrusion path of rainwater from the outside into the motor cover 321 in the labyrinth portion 343 is complicated. Therefore, the waterproofness between the seal portion 340 and the motor cover 321 is maintained.
  • the drainage portion 330 has a box-like protective cover 332 so as to cover the drainage hole 331.
  • the protective cover 332 is only formed with an opening 332 a on one surface in the horizontal direction, so that water droplets are smoothly discharged to the outside through the water drain hole 331 and the motor cover 321 from the outside through the water drain portion 330. It can control that rain water etc. invade inside. Therefore, it is possible to provide a vehicle wheel drive device 300 excellent in dust resistance and water resistance.
  • the motor unit 2 and the reduction mechanism 4 are completely covered by the casing 10 and the motor cover 321 fastened and fixed to the casing 10. For this reason, as compared with the first and second embodiments described above, intrusion of rain water and dust into the motor unit 2 and the speed reduction mechanism 4 can be reliably prevented.
  • the motor cover 321 mainly includes the fixing portion 322, the first cylindrical portion 324, the step surface 325, the second cylindrical portion 326, and the top plate 327, and the outer peripheral surface shape of the casing 10, the speed reduction mechanism 4 and the attach shaft 400. It is formed in the shape of a step along the line. As a result, the space occupied by the motor cover 321 can be saved as much as possible, and direct application of dust, rain water or the like to the motor unit 2 or the reduction mechanism 4 can be prevented.
  • the motor with a reduction gear 1 is a flat motor unit 2 configured as a so-called DC brushless motor, a control unit 3 that performs drive control of the motor unit 2, and rotational force of the motor unit 2 , And the speed reduction mechanism 4 to be driven.
  • the reduction mechanism 4 is configured as a so-called hypocycloid reduction mechanism.
  • the present invention is not limited to these, and various motors and reduction mechanisms can be employed.
  • the wheels 102, 202, and 302 of the drive wheels 101 and 201 are fastened and fixed to the output portion 44 of the speed reduction mechanism 4 has been described.
  • the shapes of the ribs 116, 216, and 316 provided on the wheels 102, 202, 302 may be changed according to the outer shape of the rotating electrical machine to be adopted.
  • the motor cover 321 mainly includes the fixing portion 322, the first cylindrical portion 324, the step surface 325, the second cylindrical portion 326, and the top plate 327. And the case where it formed in step shape so that the outer peripheral surface shape of the attach shaft 400 might be followed was demonstrated.
  • the present invention is not limited to this, and the shape of the motor cover 321 may be changed according to the outer shape of the rotating electrical machine to be adopted.
  • the seal portion 340 is attached to the tip end side of the output shaft 402 in the attach shaft 400 .
  • the present invention is not limited to this, and the wheel 502 may be provided with the seal part 340 directly.
  • the waterproof cover can prevent dust, rain water, and the like from being directly applied to the motor unit. For this reason, the drive device excellent in dust resistance and waterproofness can be provided.
  • step difference 12a second diameter reduction portion 12b: second step surface (step) 44: output portion (output shaft) 100, 200, 300: vehicle wheel drive device (drive device), drive wheel 101: drive wheel (Rotary body) 102, 202, 302, 502 Wheel, 103 Tire, 104 Disc portion 105 Rim portion 116, 216, 316 Rib (waterproof cover) 216a Inner circumferential surface 121, 221 ...
  • motor cover first motor cover, waterproof cover
  • 321 ... motor cover second motor cover, waterproof cover
  • 322 ... fixing portion cover body
  • 324 ... first cylindrical portion cover body
  • 325 ... level difference Cross main body
  • 326 second cylindrical portion (cover main body)
  • 330 water draining portion
  • 331 water draining hole
  • 332a opening portion (opening)
  • 333 third inner cylindrical portion (output Shaft cover part)

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

This drive device is provided with a motor section (2) and a wheel (102) which is connected to the output section (44) of the motor section (2) and which rotates. The wheel (102) has a circular plate-shaped disk section (104) which is affixed to the output section (44), and a rim section (105) which extends in the axial direction of the output section (44) from the outer periphery of the disk section (104) and on which a tire (103) is mounted. The disk section (104) is provided with a rib (116) surrounding the periphery of the motor section (2).

Description

駆動装置Drive unit
　本発明は、駆動装置に関する。
　本願は、２０１７年１０月１６日に、日本に出願された特願２０１７－２００２６５号、及び２０１８年５月２５日に、日本に出願された特願２０１８－１００９４６号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a drive device.
The present application claims priority based on Japanese Patent Application No. 2017-200265 filed in Japan on October 16, 2017, and Japanese Patent Application No. 2018-100946 filed in Japan on May 25, 2018. , The contents of which are incorporated herein.
　例えば、電動モータを駆動源に用いた電気自動車等において、伝動効率を高めるべく、ホイールのリム部内にモータを収めたインホイールモータが知られている。このインホイールモータとしては、モータの出力軸（回転軸）にホイールが固定され、ホイールとシャフトとが共回りするものがある（例えば、特許文献１参照）。 For example, in an electric car or the like using an electric motor as a drive source, an in-wheel motor in which a motor is housed in a rim portion of the wheel is known in order to improve transmission efficiency. As this in-wheel motor, a wheel is fixed to the output shaft (rotation shaft) of a motor, and there exist some which a wheel and a shaft rotate together (for example, refer patent document 1).
特開２０００－２９７８３１号公報Japanese Patent Application Laid-Open No. 2000-297831
　上述の従来技術のような駆動装置は、モータの出力軸がモータケース（モータケーシング）から突出しており、このモータケースと出力軸との間から塵埃や雨水等が侵入しやすい。
　駆動部がモータとモータの回転を減速して出力する、いわゆる減速機付モータの場合、減速部に塵埃や雨水が浸入すると不具合が生じる可能性があった。 In the drive device as in the above-mentioned prior art, the output shaft of the motor protrudes from the motor case (motor casing), and dust, rain water and the like easily enter from between the motor case and the output shaft.
In the case of a so-called motor with a reduction gear in which the driving unit decelerates and outputs the rotation of the motor and the motor, there is a possibility that a problem may occur if dust or rain water infiltrates the reduction gear.
　そこで、本発明は、防塵、防水性に優れた駆動装置を提供する。 Therefore, the present invention provides a drive device excellent in dust resistance and water resistance.
　上記の課題を解決するために、本発明の第１の態様に係る駆動装置は、一方向に向かうに従って漸次段差を介して縮径形成されたモータケースを有するモータ部と、前記モータケースの最も前記一方向側に配置され、前記モータ部の出力を減速して出力する出力軸を有する減速部と、前記減速部よりも前記一方向側に配置され、前記出力軸に連結されて回転する回転体と、を備え、前記モータ部、及び前記回転体の少なくともいずれか一方に、前記モータケースの周囲を取り囲むように形成された防水カバーを設け、前記防水カバーの内周面は、前記モータケースの外周面に沿うように、段付き状に形成されている。 In order to solve the above-described problems, a drive device according to a first aspect of the present invention includes a motor unit having a motor case whose diameter is gradually reduced along a level difference toward one direction, and the most of the motor case A decelerating portion disposed on the one side and having an output shaft for decelerating and outputting the output of the motor portion, and a rotation disposed on the one side with respect to the decelerating portion and connected to the output shaft for rotation A waterproof cover formed so as to surround the periphery of the motor case is provided on at least one of the motor unit and the rotating body, and an inner peripheral surface of the waterproof cover is the motor case It is formed in the shape of a step along the outer peripheral surface of.
　モータ部と減速部とを有する駆動装置において、モータケースを一方向（回転体側）に向かうに従って漸次段差を介して縮径するように形成する。また、防水カバーの内周面をモータケースの外周面に沿うように、段付き状に形成することにより、モータケースと防水カバーとの間の隙間を複雑な形状にできる。換言すれば、モータケースと防水カバーとの間の入り込む塵埃や雨水等の侵入経路を複雑化できる。このため、モータ部と減速部とを有する駆動装置であっても、減速部に塵埃や雨水が浸入してしまうことを確実に防止でき、防塵、防水性に優れた駆動装置を提供できる。 In a drive device having a motor portion and a speed reduction portion, the motor case is formed so as to gradually decrease in diameter as it goes in one direction (the rotating body side). In addition, by forming the inner peripheral surface of the waterproof cover in a stepped shape along the outer peripheral surface of the motor case, the gap between the motor case and the waterproof cover can be formed in a complicated shape. In other words, it is possible to complicate the invading route of dust, rain water and the like between the motor case and the waterproof cover. For this reason, even if it is a drive device which has a motor part and a reduction gear part, it can prevent certainly that dust and rain water infiltrate into a reduction gear part, and can provide a drive device excellent in dust resistance and waterproofness.
　本発明の第２の態様によれば、本発明の第１の態様に係る駆動装置において、前記回転体はホイールであり、前記出力軸に固定される円板状のディスク部と、該ディスク部の外周部から前記出力軸の軸方向に沿って延出し、タイヤが取付けられるリム部と、を有し、前記ディスク部に、前記モータ部の周囲を取り囲むリブが設けられており、前記リブが、前記防水カバーである。 According to a second aspect of the present invention, in the drive device according to the first aspect of the present invention, the rotating body is a wheel, and a disc-shaped disc portion fixed to the output shaft; And a rim portion extending along the axial direction of the output shaft from the outer peripheral portion of the output shaft, and a tire is mounted on the rim portion, and the disk portion is provided with a rib surrounding the periphery of the motor portion; , Said waterproof cover.
　このように構成することで、リブによって、モータ部に直接塵埃や雨水等がかかるのを防止できる。このため、防塵、防水性に優れた駆動装置を提供できる。
　モータ部に別途カバー等を設ける必要もないので、モータ部の汎用性を高めることができるとともに、モータ部の大型化を抑制でき、且つモータ部の製造コストが増大してしまうことも防止できる。 With such a configuration, the rib can prevent dust, rain water, and the like from being directly applied to the motor unit. For this reason, the drive device excellent in dust resistance and waterproofness can be provided.
Since it is not necessary to separately provide a cover or the like in the motor unit, the versatility of the motor unit can be enhanced, and the increase in size of the motor unit can be suppressed, and the manufacturing cost of the motor unit can be prevented from increasing.
　本発明の第３の態様によれば、本発明の第２の態様に係る駆動装置は、前記モータ部に、前記ディスク部に向かって突出する筒状の第１モータカバーを設け、該第１モータカバーと前記リブは、少なくとも一部が前記出力軸の径方向で重なっており、前記第１モータカバー、及び前記リブが、前記防水カバーである。 According to a third aspect of the present invention, in the drive device according to the second aspect of the present invention, the motor section is provided with a cylindrical first motor cover projecting toward the disc section, and the first motor cover is provided. At least a part of the motor cover and the rib overlap in the radial direction of the output shaft, and the first motor cover and the rib are the waterproof cover.
　このように、モータカバーとリブとを併用することにより、モータカバーによってモータ部全体を覆う場合と比較してモータカバーを小型化、簡素化できる。
　モータカバーとリブとにより、ラビリンスを形成することができるので、モータ部とリブとの間の入り込む塵埃や雨水等の侵入経路をさらに複雑化できる。このため、より確実に防塵、防水性に優れた駆動装置を提供できる。 As described above, by using the motor cover and the rib in combination, the motor cover can be miniaturized and simplified as compared with the case where the entire motor unit is covered by the motor cover.
Since the labyrinth can be formed by the motor cover and the rib, it is possible to further complicate the invading path of dust, rain water, etc. which enters between the motor portion and the rib. For this reason, it is possible to provide a drive device having more excellent dustproofness and waterproofness more reliably.
　本発明の第４の態様によれば、本発明の第１の態様に係る駆動装置は、前記モータ部に、第２モータカバーを設け、前記第２モータカバーは、前記モータケースの外周面に沿うように段付き状に形成されたカバー本体と、前記カバー本体から前記一方向側に突出された前記出力軸の周囲を取り囲むように筒状に形成された出力軸カバー部と、を備えており、前記第２モータカバーが、前記防水カバーである。 According to a fourth aspect of the present invention, in the drive device according to the first aspect of the present invention, the motor section is provided with a second motor cover, and the second motor cover is provided on the outer peripheral surface of the motor case. A cover main body formed in a stepped shape along the axis, and an output shaft cover portion formed in a tubular shape so as to surround the periphery of the output shaft projected from the cover main body in the one direction. And the second motor cover is the waterproof cover.
　このように、第２モータカバーの形状をモータケースの外周面に沿うように段付き状に形成することにより、第２モータカバーの占有スペースを極力省スペースかしつつ、モータ部に直接塵埃や雨水等がかかるのを防止できる。このため、小型化しつつ、防塵、防水性に優れた駆動装置を提供できる。 As described above, by forming the second motor cover in a stepped shape along the outer peripheral surface of the motor case, the space occupied by the second motor cover can be saved as much as possible, and dust and dust can be directly applied to the motor section. It is possible to prevent rainwater and the like from splashing. Therefore, it is possible to provide a drive device excellent in dust resistance and waterproofness while being miniaturized.
　本発明の第５の態様によれば、本発明の第４の態様に係る駆動装置において、前記回転体は、前記出力軸カバー部を前記一方向側から覆うシール部を有し、前記シール部と前記出力軸カバー部とにより、環状の間隙からなるラビリンス部を形成した。 According to a fifth aspect of the present invention, in the drive device according to the fourth aspect of the present invention, the rotating body has a seal portion covering the output shaft cover portion from the one direction side, and the seal portion And the output shaft cover portion form a labyrinth portion having an annular gap.
　このように構成することで、出力軸カバー部とシール部との間からの雨水等の侵入経路が複雑になる。このため、出力軸カバー部とシール部との間から、モータ部内に塵埃や雨水等が侵入してしまうことを抑制できる。よって、さらに防塵、防水性に優れた駆動装置を提供できる。 With this configuration, an intrusion path of rain water or the like from between the output shaft cover portion and the seal portion is complicated. For this reason, it is possible to suppress that dust, rain water and the like intrude into the motor section from between the output shaft cover section and the seal section. Therefore, it is possible to provide a drive device that is further excellent in dust resistance and waterproofness.
　本発明の第６の態様によれば、本発明の第４の態様又は第５の態様に係る駆動装置において、前記モータ部、及び前記減速部は、軸方向が水平方向に沿うように配置され、前記カバー本体の重力方向下部には、水抜き部が形成されており、前記水抜き部は、前記カバー本体の側面に形成された水抜き孔と、前記カバー本体の前記側面に、前記水抜き孔を径方向外側から覆うように形成され、前記水平方向の一面が開口されている箱状の保護カバーと、からなる。 According to a sixth aspect of the present invention, in the drive device according to the fourth aspect or the fifth aspect of the present invention, the motor unit and the speed reduction unit are arranged such that the axial direction is along the horizontal direction. A draining portion is formed at a lower portion of the cover main body in the direction of gravity, and the draining portion is a draining hole formed on a side surface of the cover main body, and the water on the side surface of the cover main body And a box-shaped protective cover formed so as to cover the extraction hole from the radially outer side and in which one surface in the horizontal direction is opened.
　このように構成することで、仮に第２モータカバー内に雨水等が侵入した場合であっても、水抜き部から速やかに雨水を排出することができる。
　水抜き部は、水抜き孔を覆うように箱状の保護カバーを有している。この保護カバーは、水平方向の一面が開口されているだけなので、水抜き孔を介して外部に雨水をスムーズに排出しつつ、外部から水抜き部を介して第２モータカバー内に雨水等が侵入してしまうことを抑制できる。このため、さらに防塵、防水性に優れた駆動装置を提供できる。 With this configuration, even if rainwater or the like intrudes into the second motor cover, rainwater can be discharged rapidly from the water draining portion.
The drainage part has a box-like protective cover so as to cover the drainage hole. Since this protective cover is open only on one side in the horizontal direction, while the rainwater is discharged smoothly to the outside through the water drainage hole, the rainwater etc. from the outside into the second motor cover from the outside through the water drainage portion. It can control that it invades. For this reason, it is possible to provide a drive device further excellent in dust resistance and waterproofness.
　上記の駆動装置によれば、防水カバーによって、モータ部に直接塵埃や雨水等がかかるのを防止できる。このため、防塵、防水性に優れた駆動装置を提供できる。 According to the above-described drive device, the waterproof cover can prevent dust, rain water, and the like from being directly applied to the motor unit. For this reason, the drive device excellent in dust resistance and waterproofness can be provided.
本発明の第１実施形態における車両ホイール駆動装置の断面図。BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the vehicle wheel drive device in 1st Embodiment of this invention. 本発明の第１実施形態における減速機付モータの斜視図。BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the motor with a reduction gear in 1st Embodiment of this invention. 図２のＡ－Ａ線に沿う断面図。Sectional drawing in alignment with the AA of FIG. 図１のＢ方向から車両ホイール駆動装置をみた一部分解斜視図。FIG. 2 is a partially exploded perspective view of the vehicle wheel drive device from the direction B of FIG. 1; 図１のＣ矢視図。C arrow line view of FIG. 本発明の第１実施形態における駆動輪を減速機付モータ側からみた斜視図。The perspective view which saw the drive wheel in 1st Embodiment of this invention from the motor side with a reduction gear. 本発明の第２実施形態における車両ホイール駆動装置の駆動輪を断面とした図。The figure which made the drive wheel of the vehicle wheel drive device in 2nd Embodiment of this invention the cross section. 本発明の第２実施形態における減速機付モータにモータカバーを取り付けた状態を示す斜視図。The perspective view which shows the state which attached the motor cover to the motor with a reduction gear in 2nd Embodiment of this invention. 図７のＤ部拡大図。The D section enlarged view of FIG. 本発明の第２実施形態の変形例における車両ホイール駆動装置の駆動輪を断面とした図。The figure which made the drive wheel of the vehicle wheel drive device in the modification of 2nd Embodiment of this invention the cross section. 本発明の第３実施形態における車両ホイール駆動装置の断面図。Sectional drawing of the vehicle wheel drive device in 3rd Embodiment of this invention. 本発明の第３実施形態におけるモータカバーの斜視図。The perspective view of the motor cover in 3rd Embodiment of this invention.
　次に、本発明の実施形態を図面に基づいて説明する。 Next, an embodiment of the present invention will be described based on the drawings.
（第１実施形態）
（車両ホイール駆動装置）
　図１は、車両ホイール駆動装置１００の断面図である。
　同図に示すように、車両ホイール駆動装置１００は、減速機付モータ１と、減速機付モータ１の後述する出力部４４に取付けられている回転体としての駆動輪１０１と、を備えている。車両ホイール駆動装置１００は、不図示の車体に取付けられ、この車体を走行させるために用いられる。 First Embodiment
(Vehicle wheel drive)
FIG. 1 is a cross-sectional view of a vehicle wheel drive 100.
As shown in the figure, the vehicle wheel drive device 100 includes a motor 1 with a reduction gear, and a drive wheel 101 as a rotating body attached to an output unit 44 described later of the motor 1 with a reduction gear. . The vehicle wheel drive device 100 is attached to a vehicle body (not shown) and used to drive the vehicle body.
　車両ホイール駆動装置１００の取付方向としては、例えば、減速機付モータ１のモータ軸線Ｌが車幅方向（水平方向）に沿うように、且つ車体の車幅方向内側に減速機付モータ１が配置されるように取り付けられる。以下の説明では、モータ軸線Ｌに沿う方向を単に軸方向、又は車体の車幅方向、モータ軸線Ｌ回りの方向を単に周方向、モータ軸線Ｌ、及び周方向に直交する方向を径方向と称して説明する場合がある。 As the mounting direction of the vehicle wheel drive device 100, for example, the motor with reduction gear 1 is disposed on the inner side in the width direction of the vehicle body so that the motor axis L of the reduction gear motor 1 is along the vehicle width direction (horizontal direction). Mounted as it is. In the following description, the direction along the motor axis L is simply referred to as the axial direction, or the vehicle width direction of the vehicle body, the direction around the motor axis L is simply referred to as the circumferential direction, and the direction orthogonal to the motor axis L and the circumferential direction is referred to as the radial direction. May be explained.
（減速機付モータ）
　図２は、減速機付モータ１の斜視図である。図３は、図２のＡ－Ａ線に沿う断面図である。
　図１～図３に示すように、減速機付モータ１は、いわゆるＤＣブラシレスモータとして構成された偏平形状のモータ部２と、モータ部２の駆動制御を行う制御部３と、モータ部２の回転力を受けて駆動する減速機構４と、を備えている。減速機付モータ１は、制御部３、モータ部２、減速機構４の順で並んで配置されている。 (Motor with reduction gear)
FIG. 2 is a perspective view of the motor 1 with a reduction gear. FIG. 3 is a cross-sectional view taken along the line AA of FIG.
As shown in FIGS. 1 to 3, the motor with a reduction gear 1 includes a flat motor unit 2 configured as a so-called DC brushless motor, a control unit 3 that performs drive control of the motor unit 2, and a motor unit 2. And a decelerating mechanism 4 driven by receiving a rotational force. The reduction gear motor 1 is disposed side by side in the order of the control unit 3, the motor unit 2, and the reduction mechanism 4.
（モータ部）
（ケーシング）
　モータ部２は、略段付き円筒状のケーシング１０内に収納されている。ケーシング１０の外周面１０ａは、制御部３から離間するに従って、２つの段差面１１ｂ，１２ｂ（第１段差面１１ｂ、第２段差面１２ｂ）を介して徐々に縮径する２つの縮径部１１ａ，１２ａ（第１縮径部１１ａ、第２縮径部１２ａ）を有している。すなわち、ケーシング１０の外周面１０ａには、軸方向略中央よりも制御部３側（図３における左側）に形成された第１段差面１１ｂを介し、外周面１０ａよりも縮径形成された第１縮径部１１ａが形成されている。ケーシング１０には、第１縮径部１１ａよりも第２段差面１２ｂを介して縮径形成された第２縮径部１２ａが形成されている。 (Motor part)
(casing)
The motor unit 2 is housed in a substantially stepped cylindrical casing 10. The outer peripheral surface 10a of the casing 10 is two reduced diameter portions 11a that gradually decrease in diameter via the two step surfaces 11b and 12b (the first step surface 11b and the second step surface 12b) as being separated from the control unit 3. , 12a (a first reduced diameter portion 11a, a second reduced diameter portion 12a). That is, on the outer peripheral surface 10a of the casing 10, a diameter is formed smaller than the outer peripheral surface 10a via the first step surface 11b formed closer to the control unit 3 (left side in FIG. 3) than the approximate center in the axial direction. A reduced diameter portion 11a is formed. The casing 10 is provided with a second reduced diameter portion 12a which is formed to have a diameter smaller than that of the first reduced diameter portion 11a via the second step surface 12b.
　第１縮径部１１ａには、径方向外側に突出し、且つ第１段差面１１ｂ上に配置される複数（例えば、本実施形態では６つ）のボルト座１７が一体成形されている。各ボルト座１７は、周方向に等間隔で配置されている。これらボルト座１７のうち、例えば３つのボルト座１７には、制御部３側の一面（裏面）１７ａに、ステータ用雌ネジ部１７ｃが刻設されている。これらステータ用雌ネジ部１７ｃは、周方向に等間隔で配置されている。ステータ用雌ネジ部１７ｃは、ケーシング１０に後述のステータ２１を締結固定するために用いられる。ステータ用雌ネジ部１７ｃが刻設されていない、例えば３つのボルト座１７には、一面１７ａとは反対側の他面（表面）１７ｂに、外部機器用雌ネジ部１７ｄが刻設されている。これら外部機器用雌ネジ部１７ｄは、不図示の外部機器（例えば、後述の第２実施形態におけるモータカバー１２１）を締結固定するために用いられる。 In the first reduced diameter portion 11a, a plurality of (for example, six in the present embodiment) bolt seats 17 that protrude radially outward and are disposed on the first step surface 11b are integrally formed. The bolt seats 17 are arranged at equal intervals in the circumferential direction. Among the bolt seats 17, for example, three bolt seats 17 are provided with female screw portions 17c for the stator on one surface (back surface) 17a on the control unit 3 side. The female screw portions 17c for the stator are arranged at equal intervals in the circumferential direction. The stator female screw portion 17 c is used to fasten and fix a stator 21 described later to the casing 10. For example, in the three bolt seats 17 where the internal female screw portion 17c for the stator is not formed, the external female female screw portion 17d is formed on the other surface (surface) 17b opposite to the one surface 17a. . These external device female screw parts 17 d are used to fasten and fix an external device (for example, a motor cover 121 in the second embodiment described later) (not shown).
　ケーシング１０の外周面１０ａには、制御部３側端に、径方向外側に向かって張り出す外フランジ部１３が一体成形されている。外フランジ部１３は、ケーシング１０と制御部３の後述する制御ケース５とを締結固定するためのものである。
　外フランジ部１３には、板状の取付ステー８１が径方向中央を中心に両側に２つずつ一体成形されている。各取付ステー８１は、径方向外側に向かって突出形成されている。取付ステー８１は、不図示の外部機器（例えば、不図示の車体）に、減速機付モータ１（ケーシング１０）を締結固定するためのものである。取付ステー８１には、厚さ方向に貫通する貫通孔８１ａが形成されている。この貫通孔８１ａに不図示のボルト等が挿通される。 An outer flange portion 13 projecting radially outward is integrally formed on an outer peripheral surface 10 a of the casing 10 at a side end of the control unit 3. The outer flange portion 13 is for fastening and fixing the casing 10 and a control case 5 of the control portion 3 described later.
In the outer flange portion 13, two plate-like mounting stays 81 are integrally formed on both sides at the center in the radial direction. Each mounting stay 81 is formed so as to protrude radially outward. The mounting stay 81 is for fastening and fixing the reduction gear motor 1 (the casing 10) to an external device (for example, a vehicle body not shown) (not shown). The mounting stay 81 is formed with a through hole 81 a penetrating in the thickness direction. A bolt or the like (not shown) is inserted into the through hole 81a.
　ケーシング１０の内周面には、第１段差面１１ｂの近傍に、径方向内側に張り出す隔壁部１４が一体成形されている。ケーシング１０は、径方向に延在する略円板状の隔壁部１４を挟んで制御部３側がモータ収納部１５として構成され、モータ収納部１５とは反対側がギヤ収納部１６として構成される。隔壁部１４の径方向中央には、略円筒状の軸受ハウジング１９が一体成形されている。この軸受ハウジング１９に、モータ部２の後述するロータ２２を回転自在に支持するための玉軸受２０が設けられている。 On the inner peripheral surface of the casing 10, a partition wall portion 14 protruding inward in the radial direction is integrally formed in the vicinity of the first step surface 11b. The casing 10 is configured as the motor storage portion 15 on the side of the control portion 3 with the substantially disk-shaped partition portion 14 extending in the radial direction interposed therebetween, and the gear storage portion 16 on the opposite side to the motor storage portion 15. A substantially cylindrical bearing housing 19 is integrally formed at the radial center of the partition wall 14. The bearing housing 19 is provided with a ball bearing 20 for rotatably supporting a rotor 22 described later of the motor unit 2.
　モータ収納部１５には、モータ部２が収納されている。モータ部２は、略リング状のステータ２１と、ステータ２１の径方向内側に回転自在に設けられたロータ２２と、により構成されている。
　ステータ２１は、電磁鋼板を複数枚積層したり軟磁性粉を加圧成形したりすることにより形成されたステータコア２３を有している。ステータコア２３の外周部には、ケーシング１０のステータ用雌ネジ部１７ｃに対応する位置に、ボルト挿通孔２１ａ（図３参照）が形成されている。このボルト挿通孔２１ａに制御部３側（図３における左側）からボルト２６を挿入する。このボルト２６をケーシング１０のステータ用雌ネジ部１７ｃに螺入することにより、ケーシング１０のモータ収納部１５に、ステータ２１が締結固定される。 A motor unit 2 is housed in the motor housing unit 15. The motor unit 2 is configured of a substantially ring shaped stator 21 and a rotor 22 provided rotatably inward of the stator 21 in the radial direction.
The stator 21 has a stator core 23 formed by laminating a plurality of electromagnetic steel sheets or pressing and forming soft magnetic powder. Bolt insertion holes 21 a (see FIG. 3) are formed on the outer peripheral portion of the stator core 23 at positions corresponding to the female internal thread 17 c for the stator of the casing 10. The bolt 26 is inserted into the bolt insertion hole 21a from the control unit 3 side (left side in FIG. 3). By screwing the bolt 26 into the female screw portion 17 c for the stator of the casing 10, the stator 21 is fastened and fixed to the motor storage portion 15 of the casing 10.
　ステータコア２３の内周面には、径方向内側に向かって突出する複数のティース２４が周方向に並んで形成されている。これらティース２４に、コイル２５が巻回されている。そして、コイル２５に給電を行うと、ステータ２１に所定の磁界が発生する。 On the inner peripheral surface of the stator core 23, a plurality of teeth 24 protruding inward in the radial direction are formed in line in the circumferential direction. A coil 25 is wound around the teeth 24. Then, when power is supplied to the coil 25, a predetermined magnetic field is generated in the stator 21.
　ロータ２２は、隔壁部１４に玉軸受２０を介して回転自在に支持されている回転軸３１と、回転軸３１に外嵌固定されているロータコア３２と、ロータコア３２に固定されているリングマグネット３３と、を備えている。回転軸３１の軸線が、モータ軸線Ｌとなる。
　回転軸３１は、玉軸受２０に支持される支持軸３４と、支持軸３４の制御部３側端（図３における左端）からこの支持軸３４よりも若干縮径形成されて軸方向に沿って延びる取付軸３５と、支持軸３４の取付軸３５とは反対側端に一体成形されたフランジ部３４ａと、により構成されている。 The rotor 22 has a rotary shaft 31 rotatably supported by the partition 14 via a ball bearing 20, a rotor core 32 externally fitted and fixed to the rotary shaft 31, and a ring magnet 33 fixed to the rotor core 32. And have. The axis of the rotating shaft 31 is the motor axis L.
The rotating shaft 31 has a diameter slightly smaller than that of the supporting shaft 34 supported by the ball bearing 20 and the control unit 3 side end (left end in FIG. 3) of the supporting shaft 34, and extends along the axial direction It is comprised by the extended attachment axis | shaft 35 and the flange part 34a integrally molded by the opposite end with the attachment axis | shaft 35 of the support shaft 34. As shown in FIG.
　フランジ部３４ａの外径は、玉軸受２０の内径よりも大きく設定されている。これにより、回転軸３１の軸方向のずれが規制される。
　取付軸３５には、ロータコア３２が外嵌固定されている。ロータコア３２は、径方向に延在する略円板状のコア本体３６を有している。コア本体３６の径方向中央部には、略円筒状の内周壁３７が、軸方向で玉軸受２０側に向かって突出形成されている。この内周壁３７が、支持軸３４に外嵌固定されている。 The outer diameter of the flange portion 34 a is set larger than the inner diameter of the ball bearing 20. Thus, the axial displacement of the rotating shaft 31 is restricted.
The rotor core 32 is externally fixed to the mounting shaft 35. The rotor core 32 has a substantially disk-shaped core body 36 extending in the radial direction. A substantially cylindrical inner circumferential wall 37 is formed in a radially central portion of the core main body 36 so as to project toward the ball bearing 20 in the axial direction. The inner peripheral wall 37 is externally fitted and fixed to the support shaft 34.
　コア本体３６の外周部には、略円筒状の外周壁３８が軸方向に沿って一体成形されている。外周壁３８の軸方向の高さは、ステータコア２３の軸方向の厚さよりも若干大きい程度に設定されている。ステータコア２３のティース２４の径方向内側端面の全体がロータコア３２の外周壁３８と径方向で対向している。このような外周壁３８の外周面に、リングマグネット３３が外嵌固定されている。リングマグネット３３は、外周壁３８に対応するように、略円筒状に形成されている。リングマグネット３３には、複数のＮ極とＳ極とが周方向に交互に着磁されている。
　外周壁３８に固定される磁石は、リングマグネット３３に限られるものではなく、周方向に分割された磁石であってもよい。この場合、外周壁３８に、周方向で磁極が順番になるように固定する。 A substantially cylindrical outer peripheral wall 38 is integrally formed along the axial direction on the outer peripheral portion of the core main body 36. The axial height of the outer peripheral wall 38 is set to be slightly larger than the axial thickness of the stator core 23. The entire radially inner end surface of the teeth 24 of the stator core 23 radially faces the outer peripheral wall 38 of the rotor core 32. The ring magnet 33 is externally fitted and fixed to the outer peripheral surface of such an outer peripheral wall 38. The ring magnet 33 is formed in a substantially cylindrical shape so as to correspond to the outer peripheral wall 38. In the ring magnet 33, a plurality of N poles and S poles are alternately magnetized in the circumferential direction.
The magnet fixed to the outer peripheral wall 38 is not limited to the ring magnet 33, and may be a magnet divided in the circumferential direction. In this case, the magnetic poles are fixed to the outer peripheral wall 38 in order in the circumferential direction.
（減速機構）
　回転軸３１の減速機構４側端（左端）には、軸方向に沿って偏心軸４１が一体成形されている。この偏心軸４１は、減速機構４の一部を構成している。減速機構４は、いわゆるハイポサイクロイド減速機構として構成されている。減速機構４は、偏心軸４１の他に、ケーシング１０のギヤ収納部１６に固定されているリングギヤ４２と、リングギヤ４２に噛合される揺動歯車４３と、揺動歯車４３に噛合される出力部４４と、を備えている。 (Reduction mechanism)
An eccentric shaft 41 is integrally formed along the axial direction at the end (left end) of the rotation shaft 31 at the side of the reduction mechanism 4. The eccentric shaft 41 constitutes a part of the reduction mechanism 4. The reduction mechanism 4 is configured as a so-called hypocycloid reduction mechanism. In addition to the eccentric shaft 41, the reduction gear mechanism 4 includes a ring gear 42 fixed to the gear storage portion 16 of the casing 10, an oscillating gear 43 engaged with the ring gear 42, and an output part engaged with the oscillating gear 43. And 44.
　偏心軸４１は、回転軸３１のフランジ部３４ａ上に形成された偏心部４５と、偏心部４５のフランジ部３４ａとは反対側端から軸方向に沿って延びる支持軸４６と、により構成されている。偏心部４５は、略円柱状に形成されている。そして、偏心部４５の外周面４５ａは、モータ軸線Ｌに対して偏心した位置を中心Ｏとする円筒面で形成されている。支持軸４６は、軸心がモータ軸線Ｌと一致するように形成されている。 The eccentric shaft 41 is constituted by an eccentric portion 45 formed on the flange portion 34a of the rotary shaft 31, and a support shaft 46 extending along the axial direction from the end of the eccentric portion 45 opposite to the flange portion 34a. There is. The eccentric part 45 is formed in a substantially cylindrical shape. The outer peripheral surface 45 a of the eccentric portion 45 is formed of a cylindrical surface whose center O is a position eccentric to the motor axis L. The support shaft 46 is formed such that its axis coincides with the motor axis L.
　偏心部４５には、玉軸受４７を１つ介して揺動歯車４３が回転自在に支持されている。揺動歯車４３は、径方向に延在する略円板状の揺動歯車本体４８と、揺動歯車本体４８の径方向中央から軸方向に沿ってモータ部２とは反対側に向かって突出する略円筒状の軸受ハウジング４９と、揺動歯車本体４８の外周部から軸受ハウジング４９の立設方向と同一方向に向かって立設された略円筒状の歯壁５０と、が一体成形されている。揺動歯車４３が形成されているので、この揺動歯車４３には、軸受ハウジング４９と歯壁５０との間に、モータ部２とは反対側（図３における右側）が開口された軸方向からみて略円環状の凹部４３ａが形成される。 The oscillating gear 43 is rotatably supported by the eccentric portion 45 via one ball bearing 47. The rocking gear 43 protrudes from the radial center of the rocking gear main body 48 along the axial direction toward the opposite side to the motor unit 2 from the substantially disc-shaped rocking gear main body 48 extending in the radial direction. A substantially cylindrical bearing housing 49, and a substantially cylindrical tooth wall 50 erected from the outer peripheral portion of the oscillating gear main body 48 in the same direction as the direction in which the bearing housing 49 is erected; There is. Since the oscillating gear 43 is formed, the oscillating gear 43 has an axial direction in which the opposite side (right side in FIG. 3) to the motor unit 2 is opened between the bearing housing 49 and the tooth wall 50. A substantially annular recess 43a is formed as viewed from the point of view.
　揺動歯車４３の軸受ハウジング４９が、玉軸受４７を介して偏心部４５に回転自在に支持されている。歯壁５０には、外周面に外歯５０ａが形成されており、内周面に内歯５０ｂが形成されている。ここで、外歯５０ａの軸方向中央、内歯５０ｂの軸方向中央、及び玉軸受４７の軸方向中央は、径方向で同一平面Ｐ上に位置している。 A bearing housing 49 of the oscillating gear 43 is rotatably supported by the eccentric portion 45 via a ball bearing 47. In the tooth wall 50, outer teeth 50a are formed on the outer circumferential surface, and inner teeth 50b are formed on the inner circumferential surface. Here, the axial center of the outer teeth 50a, the axial center of the inner teeth 50b, and the axial center of the ball bearing 47 are located on the same plane P in the radial direction.
　揺動歯車４３の外歯５０ａには、リングギヤ４２の内歯４２ａが噛合されている。リングギヤ４２は、外周面がケーシング１０のギヤ収納部１６に内嵌固定されている。リングギヤ４２の内周面に、モータ軸線Ｌと同心の内歯４２ａが形成されている。 An internal tooth 42 a of the ring gear 42 is engaged with the external tooth 50 a of the oscillating gear 43. An outer peripheral surface of the ring gear 42 is fitted in and fixed to the gear storage portion 16 of the casing 10. On the inner peripheral surface of the ring gear 42, an internal tooth 42a concentric with the motor axis L is formed.
　揺動歯車４３の内歯５０ｂには、出力部４４の外歯５３ａが噛合されている。出力部４４は、径方向に延在する略円板状の出力部本体５１を有している。出力部本体５１のモータ部２側（図３における左側）の一面５１ａには、径方向中央に、軸受収納凹部５２が形成されている。この軸受収納凹部５２に、玉軸受４０が収納されている。この玉軸受４０を介し、出力部本体５１に、偏心軸４１の支持軸４６が回転自在に支持されている。 The external teeth 53 a of the output unit 44 are engaged with the internal teeth 50 b of the oscillating gear 43. The output unit 44 has a substantially disk-shaped output unit main body 51 extending in the radial direction. A bearing storage recess 52 is formed at the center in the radial direction on one surface 51 a of the output unit main body 51 on the motor unit 2 side (left side in FIG. 3). The ball bearing 40 is housed in the bearing housing recess 52. The support shaft 46 of the eccentric shaft 41 is rotatably supported by the output unit main body 51 via the ball bearing 40.
　出力部本体５１の一面５１ａには、外歯リング５３が突出形成されている。外歯リング５３は、揺動歯車４３の凹部４３ａに対応するように形成されている。この凹部４３ａに、外歯リング５３が臨まされている。このような外歯リング５３の外周面に、リングギヤ４２の内歯４２ａに噛合され、且つモータ軸線Ｌと同心の外歯５３ａが形成されている。 An external tooth ring 53 is formed on one surface 51 a of the output unit main body 51 so as to protrude therefrom. The external gear ring 53 is formed to correspond to the recess 43 a of the oscillating gear 43. The external tooth ring 53 is exposed to the recess 43a. The outer teeth 53 a engaged with the inner teeth 42 a of the ring gear 42 and concentric with the motor axis L are formed on the outer peripheral surface of the outer teeth ring 53.
　リングギヤ４２の内歯４２ａと揺動歯車４３の外歯５０ａとの噛合範囲の軸方向中央は、これら内歯４２ａ及び外歯５０ａの軸方向中央とほぼ一致している。揺動歯車４３の内歯５０ｂと出力部４４の外歯５３ａとの噛合範囲の軸方向中央は、これら内歯５０ｂ及び外歯５３ａの軸方向中央とほぼ一致している。すなわち、リングギヤ４２の内歯４２ａと揺動歯車４３の外歯５０ａとの噛合範囲の軸方向中央、及び揺動歯車４３の内歯５０ｂと出力部４４の外歯５３ａとの噛合範囲の軸方向中央、玉軸受４７の軸方向中央は、径方向でほぼ同一平面Ｐ上に位置している。 The axial center of the meshing range of the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the oscillating gear 43 substantially coincides with the axial centers of the inner teeth 42a and the outer teeth 50a. The axial center of the meshing range of the internal teeth 50b of the oscillating gear 43 and the external teeth 53a of the output portion 44 substantially coincides with the axial centers of the internal teeth 50b and the external teeth 53a. That is, the axial center of the meshing range of the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the rocking gear 43, and the axial direction of the meshing range of the inner teeth 50b of the rocking gear 43 and the outer teeth 53a of the output portion 44 The center and the axial center of the ball bearing 47 are located on substantially the same plane P in the radial direction.
　出力部本体５１の一面５１ａとは反対側の他面５１ｂには、複数（例えば、本実施形態では４つ）の雌ネジ部５４が刻設されている。これら雌ネジ部５４は、駆動輪１０１を出力部４４に締結固定する。 On the other surface 51b opposite to the one surface 51a of the output unit main body 51, a plurality of (for example, four in the present embodiment) female screw parts 54 are engraved. The female screw parts 54 fasten and fix the drive wheel 101 to the output part 44.
　出力部４４は、出力部本体５１が玉軸受５５を介してガイド部５６に回転自在に支持されている。出力部本体５１の外周面には、玉軸受５５の内輪５５ａが外嵌されている。出力部本体５１の揺動歯車４３側端（図３における左端）には、外周面から径方向外側に向かって張り出す軸受外フランジ部５８が一体成形されている。この軸受外フランジ部５８に、玉軸受５５における内輪５５ａの揺動歯車４３側の端部が当接することにより、玉軸受５５の揺動歯車４３側への移動が規制される。 The output unit main body 51 of the output unit 44 is rotatably supported by the guide unit 56 via the ball bearing 55. An inner ring 55 a of the ball bearing 55 is externally fitted to the outer peripheral surface of the output portion main body 51. At an end (the left end in FIG. 3) of the swing gear 43 of the output unit main body 51, a bearing outer flange portion 58 projecting radially outward from an outer peripheral surface is integrally formed. When the end of the ball bearing 55 on the swing gear 43 side of the ball bearing 55 abuts on the bearing outer flange portion 58, the movement of the ball bearing 55 to the swing gear 43 side is restricted.
　ガイド部５６は、略円筒状に形成されたガイド本体５７と、ガイド本体５７の外周面５７ａに径方向外側に張り出すように一体成形されたフランジ部５９と、により構成されている。
　フランジ部５９は、ケーシング１０の制御部３とは反対側の端面に当接する。そして、複数（例えば、本実施形態では４つ）のボルト６０によって、ケーシング１０にフランジ部５９が締結固定されている。これにより、ケーシング１０にガイド部５６が固定される。 The guide portion 56 is configured of a guide main body 57 formed in a substantially cylindrical shape, and a flange portion 59 integrally formed so as to protrude outward in the radial direction on the outer peripheral surface 57 a of the guide main body 57.
The flange portion 59 abuts on the end surface of the casing 10 opposite to the control portion 3. The flange portion 59 is fastened and fixed to the casing 10 by a plurality of (for example, four in the present embodiment) bolts 60. Thus, the guide portion 56 is fixed to the casing 10.
　ガイド本体５７の内周面には、玉軸受５５の外輪５５ｂが内嵌されている。ガイド本体５７の揺動歯車４３とは反対側端（図３における右端）には、内周面から径方向内側に向かって張り出す軸受内フランジ部６１が一体成形されている。この軸受内フランジ部６１に、玉軸受５５における外輪５５ｂの揺動歯車４３とは反対側の端部が当接することにより、玉軸受５５の揺動歯車４３とは反対側への移動が規制される。玉軸受５５は、軸受内フランジ部６１の内周縁側の開口を介して外部に露出している。
　このように、玉軸受５５は、出力部４４の軸受外フランジ部５８に、玉軸受５５における内輪５５ａの揺動歯車４３側の端部が当接する。そして、玉軸受５５は、ガイド部５６の軸受内フランジ部６１に、玉軸受５５における外輪５５ｂの揺動歯車４３とは反対側の端部が当接する。これにより軸方向の位置決めが行われる。 An outer ring 55 b of the ball bearing 55 is fitted on the inner peripheral surface of the guide main body 57. A bearing inner flange portion 61 projecting integrally inward in the radial direction from the inner peripheral surface is integrally formed at an end (right end in FIG. 3) opposite to the swing gear 43 of the guide main body 57. The end of the ball bearing 55 on the opposite side of the rocking gear 43 of the outer ring 55b abuts on the bearing inner flange portion 61, thereby restricting the movement of the ball bearing 55 to the side opposite to the rocking gear 43. Ru. The ball bearing 55 is exposed to the outside through an opening on the inner peripheral edge side of the bearing inner flange portion 61.
As described above, in the ball bearing 55, the end portion of the ball bearing 55 on the swing gear 43 side abuts on the bearing outer flange portion 58 of the output portion 44. The ball bearing 55 contacts the bearing inner flange portion 61 of the guide portion 56 with the end portion of the ball bearing 55 on the opposite side of the swing gear 43 of the outer ring 55 b. Thus, axial positioning is performed.
　ガイド本体５７の揺動歯車４３側の端面には、外周部寄りから揺動歯車４３側に向かって突出するリブ６２が一体成形されている。リブ６２は、軸方向平面視で略円環状に形成されている。 On an end face of the guide main body 57 on the oscillating gear 43 side, a rib 62 which protrudes toward the oscillating gear 43 side from the outer peripheral part side is integrally formed. The rib 62 is formed in a substantially annular shape in an axial plan view.
　出力部４４の出力部本体５１の外径、及びガイド部５６のガイド本体５７の内径は、これら各本体５１，５７の間に設けられた玉軸受５５が、リングギヤ４２の内歯４２ａと揺動歯車４３の外歯５０ａとの噛合位置、及び揺動歯車４３の内歯５０ｂと出力部４４の外歯５３ａとの噛合位置と軸方向で対向するように設定されている。
　ここでいう軸方向で対向とは、完全に軸方向で対向していることではなく、軸方向に沿ってリングギヤ４２の内歯４２ａと揺動歯車４３の外歯５０ａとの噛合位置、及び揺動歯車４３の内歯５０ｂと出力部４４の外歯５３ａとの噛合位置と、玉軸受５５と、が並んで配置されていることをいう。 The ball bearing 55 provided between the respective main bodies 51 and 57 swings with the internal teeth 42 a of the ring gear 42 in the outer diameter of the output main body 51 of the output portion 44 and the inner diameter of the guide main body 57 of the guide portion 56. The meshing position of the gear 43 with the external gear 50a and the meshing position of the internal gear 50b of the rocking gear 43 and the external gear 53a of the output portion 44 are set to face each other in the axial direction.
The term “axially opposed” does not mean that they are completely opposed in the axial direction, but the meshing position of the internal teeth 42 a of the ring gear 42 and the external teeth 50 a of the oscillating gear 43 along the axial direction It means that the meshing position of the internal teeth 50b of the moving gear 43 and the external teeth 53a of the output part 44 and the ball bearing 55 are arranged side by side.
　また、ガイド部５６のガイド本体５７にリブ６２が設けられているので、このリブ６２の径方向内側に、間隙が形成される。すなわち、リングギヤ４２の内歯４２ａと揺動歯車４３の外歯５０ａとの噛合位置、及び揺動歯車４３の内歯５０ｂと出力部４４の外歯５３ａとの噛合位置と、玉軸受５５と、の間に、間隙が形成される。この間隙は、潤滑剤溜まり部６３として構成される。潤滑剤溜まり部６３には、不図示の潤滑剤が充填される。この潤滑剤は、リングギヤ４２の内歯４２ａと揺動歯車４３の外歯５０ａとの噛合抵抗、及び揺動歯車４３の内歯５０ｂと出力部４４の外歯５３ａとの噛合抵抗を低減する役割を有する。そして、この潤滑剤は、玉軸受５５の摺動抵抗を低減する役割を有している。 Further, since the rib 62 is provided on the guide main body 57 of the guide portion 56, a gap is formed on the radially inner side of the rib 62. That is, the meshing position of the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the rocking gear 43, the meshing position of the inner teeth 50b of the rocking gear 43 and the outer teeth 53a of the output portion 44; A gap is formed between the The gap is configured as a lubricant reservoir 63. The lubricant reservoir 63 is filled with a lubricant (not shown). This lubricant serves to reduce the meshing resistance between the inner teeth 42a of the ring gear 42 and the outer teeth 50a of the rocking gear 43 and the meshing resistance between the inner teeth 50b of the rocking gear 43 and the outer teeth 53a of the output portion 44. Have. The lubricant has a role of reducing the sliding resistance of the ball bearing 55.
　玉軸受５５は、ガイド部５６の軸受内フランジ部６１における内周縁側の開口を介して外部に露出している。このため、少なくとも玉軸受５５の軸受内フランジ部６１側の面に、シールを設けることが望ましい。これにより、外部から玉軸受５５に塵埃等が侵入してしまうことを防止できる。 The ball bearing 55 is exposed to the outside through an opening on the inner peripheral edge side of the bearing inner flange portion 61 of the guide portion 56. For this reason, it is desirable to provide a seal at least on the surface of the ball bearing 55 on the bearing inner flange portion 61 side. This can prevent dust and the like from entering the ball bearing 55 from the outside.
（制御部）
　制御部３は、有底円筒状の制御ケース５と、制御ケース５内に収納されている制御基板６と、を備えている。制御ケース５は、開口部５ａをモータ部２側に向けた形で配置される。制御ケース５の開口部５ａには、径方向外側に向かって張り出す外フランジ部７１が形成されている。この外フランジ部７１のモータ部２側の端面７１ａが、ケーシング１０の外フランジ部１３に当接される。制御ケース５の外フランジ部７１とケーシング１０外フランジ部１３とが複数のボルト７２（図１、図２参照）によって、締結固定される。 (Control unit)
The control unit 3 includes a bottomed cylindrical control case 5 and a control board 6 housed in the control case 5. The control case 5 is disposed with the opening 5 a facing the motor unit 2. In the opening 5 a of the control case 5, an outer flange portion 71 protruding outward in the radial direction is formed. An end surface 71 a of the outer flange portion 71 on the motor portion 2 side is in contact with the outer flange portion 13 of the casing 10. The outer flange portion 71 of the control case 5 and the outer flange portion 13 of the casing 10 are fastened and fixed by a plurality of bolts 72 (see FIGS. 1 and 2).
　制御ケース５の外フランジ部７１の端面７１ａには、全周に渡ってＯリング溝７３が形成されている。このＯリング溝７３に、不図示のＯリングを装着することにより、制御ケース５の外フランジ部７１とケーシング１０の外フランジ部１３との間のシール性が確保される。
　制御ケース５には、この制御ケース５内に収納されている制御基板６に接続された後述のパワー用ハーネス７５を引き出す略円筒状のパワー用引出口７７、及びセンサ用ハーネス７６を引き出す略円筒状のセンサ用引出口７８が外方に向かって突出形成されている。 An O-ring groove 73 is formed on the end surface 71 a of the outer flange portion 71 of the control case 5 over the entire circumference. By mounting an O-ring (not shown) in the O-ring groove 73, the sealability between the outer flange portion 71 of the control case 5 and the outer flange portion 13 of the casing 10 is secured.
The control case 5 has a substantially cylindrical power outlet 77 for drawing out a power harness 75 described later connected to the control substrate 6 housed in the control case 5 and a substantially cylindrical shape for drawing out the sensor harness 76. The sensor outlet 78 is formed to project outward.
　制御基板６は、いわゆるエポキシ基板に複数の導電性のパターン（不図示）が形成されたものである。制御基板６は、この一面がステータ２１及びロータ２２と軸方向で対向するように配置されている。制御基板６には、ロータ２２のリングマグネット３３に軸方向で対向する位置に、複数の磁気検出素子７４が実装されている。磁気検出素子７４は、リングマグネット３３の磁気変化を検出することにより、ロータ２２の回転位置を検出する。 The control substrate 6 is a so-called epoxy substrate on which a plurality of conductive patterns (not shown) are formed. The control board 6 is disposed such that this one surface faces the stator 21 and the rotor 22 in the axial direction. A plurality of magnetic detection elements 74 are mounted on the control board 6 at positions axially opposed to the ring magnet 33 of the rotor 22. The magnetic detection element 74 detects the rotational position of the rotor 22 by detecting the magnetic change of the ring magnet 33.
　制御基板６には、ステータ２１のコイル２５の端末部が接続されているとともに、不図示の外部電源に接続されるパワー用ハーネス７５の端末部、および不図示の外部制御機器に接続されるセンサ用ハーネス７６の端末部が接続されている。制御基板６には、この制御基板６に印加される電圧の平滑化を行うコンデンサ（不図示）等が実装されている。制御基板６に、例えば、コイル２５に供給する電流を制御するＦＥＴ（Ｆｉｅｌｄ　Ｅｆｆｅｃｔ　Ｔｒａｎｓｉｓｔｏｒ：電界効果トランジスタ）等のスイッチング素子からなるパワーモジュール（不図示）を実装してもよい。 A terminal of the coil 25 of the stator 21 is connected to the control board 6, and a sensor of a terminal of the power harness 75 connected to an external power supply (not shown) and an external control device (not shown) The terminal portion of the harness 76 is connected. A capacitor (not shown) or the like for smoothing the voltage applied to the control substrate 6 is mounted on the control substrate 6. For example, a power module (not shown) formed of a switching element such as an FET (Field Effect Transistor) that controls the current supplied to the coil 25 may be mounted on the control substrate 6.
（駆動輪）
　図４は、図１のＢ方向から車両ホイール駆動装置１００をみた一部分解斜視図である。
　図１、図４に示すように、駆動輪１０１は、ホイール１０２と、ホイール１０２のリム部１０５に組み付けられたタイヤ１０３と、を備えている。
　ホイール１０２は、モータ軸線Ｌと同心の略円板状に形成されたディスク部１０４と、ディスク部１０４の外周縁から減速機付モータ１側（図１における左側）に向かって突出するリム部１０５と、が一体成形されている。 (Drive wheel)
FIG. 4 is a partially exploded perspective view of the vehicle wheel drive device 100 from the direction B in FIG.
As shown in FIGS. 1 and 4, the drive wheel 101 includes a wheel 102 and a tire 103 assembled to the rim portion 105 of the wheel 102.
The wheel 102 has a disc portion 104 formed in a substantially disc shape concentric with the motor axis L, and a rim portion 105 projecting from the outer peripheral edge of the disc portion 104 toward the motor with reducer 1 (left side in FIG. 1). And are integrally molded.
　リム部１０５は、モータ軸線Ｌと同心の略円筒状のリム本体１０６と、リム本体１０６の軸方向両端から径方向に張り出す２つの外フランジ部１０７ａ，１０７ｂと、が一体成形されている。これらリム本体１０６と２つの外フランジ部１０７ａ，１０７ｂとにより、径方向外側が開口されたタイヤ収納凹部１０８が形成される。このタイヤ収納凹部１０８に収納されるように、ホイール１０２にタイヤ１０３が取り付けられている。 The rim portion 105 is integrally formed with a substantially cylindrical rim main body 106 concentric with the motor axis L and two outer flange portions 107 a and 107 b radially projecting from both axial ends of the rim main body 106. The rim main body 106 and the two outer flange portions 107a and 107b form a tire storage recess 108 whose radially outer side is opened. A tire 103 is attached to the wheel 102 so as to be stored in the tire storage recess 108.
　ディスク部１０４の減速機付モータ１とは反対側（図１における右側、図４における紙面手前側）の一面１０４ａには、径方向中央の大部分に軸方向平面視で略円形状の凹部１０９が形成されている。この凹部１０９の径方向中央部には、減速機付モータ１における出力部４４の雌ネジ部５４に対応する位置に、ボルト挿通孔１１１が貫通形成されている。このボルト挿通孔１１１にボルト１１０を挿通し、出力部４４の雌ネジ部５４にボルト１１０を螺入する。これにより、出力部４４の他面５１ｂに、ディスク部１０４の一面１０４ａとは反対側の他面１０４ｂが当接された状態で、出力部４４にホイール１０２が締結固定される。出力部４４とホイール１０２とが一体となって回転する。 On one surface 104a of the disk portion 104 on the opposite side to the reduction motor 1 (right side in FIG. 1, front side in FIG. 4), the concave portion 109 substantially circular in plan view in the axial direction Is formed. A bolt insertion hole 111 is formed in a radially central portion of the recess 109 at a position corresponding to the female screw portion 54 of the output portion 44 of the motor 1 with a reduction gear. The bolt 110 is inserted into the bolt insertion hole 111, and the bolt 110 is screwed into the female screw portion 54 of the output portion 44. Thus, the wheel 102 is fastened and fixed to the output unit 44 in a state where the other surface 104 b opposite to the one surface 104 a of the disk unit 104 is in contact with the other surface 51 b of the output unit 44. The output unit 44 and the wheel 102 rotate integrally.
　図５は、図１のＣ矢視図である。
　図４、図５に示すように、ディスク部１０４の凹部１０９には、外周寄りに、４つの長孔１１２が周方向に等間隔で形成されている。長孔１１２は、ほぼ周方向に沿って長い直線状で、且つ長円形状の孔である。長孔１１２は、ホイール１０２の軽量化を図る機能と、ドライバー等の工具を差し込む差し込み口としての機能と、を有している。 FIG. 5 is a view on arrow C of FIG.
As shown in FIGS. 4 and 5, in the recess 109 of the disk portion 104, four elongated holes 112 are formed at equal intervals in the circumferential direction near the outer periphery. The long holes 112 are long straight and oblong holes substantially along the circumferential direction. The elongated hole 112 has a function of reducing the weight of the wheel 102 and a function as an insertion slot into which a tool such as a driver is inserted.
　凹部１０９の直径は、減速機付モータ１のケーシング１０の最外径よりも大きく設定されている。図５に詳示するように、長孔１１２とケーシング１０の取付ステー８１とが軸方向で対向している。このため、不図示の車体に車両ホイール駆動装置１００を取り付ける際、車幅方向外側から、不図示のボルトを、長孔１１２を介して取付ステー８１の貫通孔８１ａに挿入することができる。車幅方向外側から長孔１１２に不図示の工具を挿入し、不図示のボルトを締め付けることができる。 The diameter of the recess 109 is set larger than the outermost diameter of the casing 10 of the motor 1 with a reduction gear. As shown in detail in FIG. 5, the long hole 112 and the mounting stay 81 of the casing 10 are opposed in the axial direction. Therefore, when the vehicle wheel drive device 100 is attached to a vehicle body (not shown), a bolt (not shown) can be inserted into the through hole 81 a of the mounting stay 81 via the long hole 112 from the outside in the vehicle width direction. A tool (not shown) can be inserted into the long hole 112 from the outside in the vehicle width direction, and a bolt (not shown) can be tightened.
　図３、図４に示すように、ディスク部１０４の一面１０４ａには、凹部１０９に嵌合されるホイールカバー１１３が設けられている。ホイールカバー１１３は、ボルト１１４によってディスク部１０４に締結固定されている。ホイールカバー１１３によって、ディスク部１０４の凹部１０９に露出しているボルト１１０が覆われる。ディスク部１０４の凹部１０９に形成されている長孔１１２が覆われる。このため、駆動輪１０１の意匠性が高まる。 As shown in FIG. 3 and FIG. 4, a wheel cover 113 fitted to the recess 109 is provided on one surface 104 a of the disk portion 104. The wheel cover 113 is fastened and fixed to the disc portion 104 by a bolt 114. The wheel cover 113 covers the bolt 110 exposed in the recess 109 of the disk portion 104. The long hole 112 formed in the recess 109 of the disk portion 104 is covered. For this reason, the designability of the driving wheel 101 is enhanced.
　ディスク部１０４の他面１０４ｂには、軸方向平面視で略円環状のインロー部１１５が僅かに突出するように一体成形されている。このインロー部１１５は、内周縁が出力部４４の出力部本体５１に外嵌されている。これにより、出力部４４に対するホイール１０２（ディスク部１０４）の径方向の位置決めが行われる。 On the other surface 104b of the disk portion 104, a substantially annular inlay portion 115 is integrally formed so as to slightly protrude in the axial direction plan view. An inner peripheral edge of the inlay portion 115 is externally fitted to the output portion main body 51 of the output portion 44. Thereby, radial positioning of the wheel 102 (disk unit 104) with respect to the output unit 44 is performed.
　図６は、駆動輪１０１を減速機付モータ１側からみた斜視図である。
　図１、図６に示すように、ディスク部１０４の他面１０４ｂには、減速機付モータ１におけるケーシング１０の第１縮径部１１ａ、及び第１段差面１１ｂに対応する位置に、これら第１縮径部１１ａ、及び第１段差面１１ｂに向かって突出する略円筒状のリブ１１６が一体成形されている。 FIG. 6 is a perspective view of the drive wheel 101 as viewed from the motor with reducer 1.
As shown in FIGS. 1 and 6, on the other surface 104b of the disk portion 104, the first reduced diameter portion 11a of the casing 10 and the first step surface 11b of the motor with a reduction gear 1 are provided. A substantially cylindrical rib 116 projecting toward the first reduced diameter portion 11a and the first step surface 11b is integrally formed.
　リブ１１６は、ディスク部１０４の他面１０４ｂからケーシング１０の第１段差面１１ｂの直前に至るまで突出する略円筒状の第１凸部１１７と、第１凸部１１７の外周部からさらにケーシング１０の外フランジ部１３の直前に至るまで突出されている。リブ１１６は、ケーシング１０の外周面を覆うように略円筒状に形成された第２凸部１１８と、により構成されている。すなわち、リブ１１６は、内周面の形状が、ケーシング１０の段付き状の外周面に対応するように段付き状に形成されている。 The rib 116 further extends from the outer peripheral portion of the substantially cylindrical first convex portion 117 projecting from the other surface 104 b of the disk portion 104 to just before the first step surface 11 b of the casing 10 and the casing 10 further. It projects until just before the outer flange portion 13 of the The rib 116 is configured by a second convex portion 118 formed in a substantially cylindrical shape so as to cover the outer peripheral surface of the casing 10. That is, the rib 116 is formed in a stepped shape so that the shape of the inner peripheral surface corresponds to the stepped outer peripheral surface of the casing 10.
　第１凸部１１７の内径は、ケーシング１０の第１縮径部１１ａの直径よりもやや大きい程度に設定されている。第２凸部１１８の内径は、ケーシング１０のボルト座１７の最外径よりもやや大きい程度に設定されている。このため、リブ１１６とケーシング１０とが干渉することがない。 The inner diameter of the first convex portion 117 is set to be slightly larger than the diameter of the first reduced diameter portion 11 a of the casing 10. The inner diameter of the second convex portion 118 is set to be slightly larger than the outermost diameter of the bolt seat 17 of the casing 10. For this reason, the rib 116 and the casing 10 do not interfere with each other.
（車両ホイール駆動装置の動作）
　次に、車両ホイール駆動装置１００の動作について説明する。
　制御部３を介してモータ部２のコイル２５に所定の電流が供給されると、ステータ２１に所定の磁界が発生する。そして、この磁界とロータ２２のリングマグネット３３との間に磁気的な吸引力や反発力が生じ、ロータ２２が回転する。 (Operation of the vehicle wheel drive)
Next, the operation of the vehicle wheel drive device 100 will be described.
When a predetermined current is supplied to the coil 25 of the motor unit 2 through the control unit 3, a predetermined magnetic field is generated in the stator 21. Then, a magnetic attractive force or repulsive force is generated between the magnetic field and the ring magnet 33 of the rotor 22, and the rotor 22 rotates.
　ロータ２２が回転すると、ロータ２２の回転軸３１に一体成形されている偏心軸４１が回転する。偏心軸４１が回転すると、その回転を受けて揺動歯車４３が回転する。揺動歯車４３は、偏心軸４１の偏心部４５に対して玉軸受４７を介して回転自在に設けられているとともに、外歯５０ａがリングギヤ４２の内歯４２ａに噛合されている。このため、揺動歯車４３は、モータ軸線Ｌ回りに公転し、且つ偏心部４５の中心Ｏ（図３照）回りに、偏心軸４１に対して減速回転する。また、揺動歯車４３の揺動回転により、揺動歯車４３の内歯５０ｂに噛合される出力部４４が、揺動歯車４３に対して動力が伝達される。これにより、出力部４４が回転する。 When the rotor 22 rotates, the eccentric shaft 41 integrally formed on the rotation shaft 31 of the rotor 22 rotates. When the eccentric shaft 41 rotates, the oscillating gear 43 rotates in response to the rotation. The oscillating gear 43 is rotatably provided with respect to the eccentric portion 45 of the eccentric shaft 41 via a ball bearing 47, and the external gear 50 a is engaged with the internal gear 42 a of the ring gear 42. For this reason, the oscillating gear 43 revolves around the motor axis L, and decelerates and rotates with respect to the eccentric shaft 41 around the center O (see FIG. 3) of the eccentric portion 45. Further, the power is transmitted to the oscillating gear 43 by the output portion 44 engaged with the internal teeth 50 b of the oscillating gear 43 by the oscillating rotation of the oscillating gear 43. Thus, the output unit 44 is rotated.
　出力部４４が回転すると、この出力部４４と一体化されている駆動輪１０１が回転する。これにより、車両ホイール駆動装置１００が取り付けられている不図示の車体が走行する。
　ホイール１０２のリブ１１６によって、ケーシング１０の外周面が覆われているので、モータ部２に直接塵埃や雨水等がかかることが防止される。 When the output unit 44 rotates, the drive wheel 101 integrated with the output unit 44 rotates. Thereby, a vehicle body (not shown) to which the vehicle wheel drive device 100 is attached travels.
Since the outer peripheral surface of the casing 10 is covered by the rib 116 of the wheel 102, direct application of dust, rain water, etc. to the motor unit 2 is prevented.
　上述の第１実施形態では、ホイール１０２には、ディスク部１０４の他面１０４ｂに、ケーシング１０の外周面を覆うリブ１１６が突出形成されている。このため、モータ部２に直接塵埃や雨水等がかかるのを防止できる。このため、防塵、防水性に優れた車両ホイール駆動装置１００を提供できる。減速機付モータ１の玉軸受５５は、軸受内フランジ部６１の内周縁側の開口を介して外部に露出しているが、リブ１１６によって、玉軸受５５内に塵埃や雨水等が侵入してしまうことを確実に防止できる。 In the above-described first embodiment, a rib 116 covering the outer peripheral surface of the casing 10 is formed on the other surface 104 b of the disk portion 104 so as to protrude from the wheel 102. For this reason, it is possible to prevent the dust, rain water and the like from being directly applied to the motor unit 2. For this reason, the vehicle wheel drive device 100 excellent in dust resistance and waterproofness can be provided. The ball bearing 55 of the reduction gear motor 1 is exposed to the outside through the opening on the inner peripheral edge side of the bearing inner flange portion 61, but dust, rain water, etc. intrude into the ball bearing 55 by the rib 116. It is possible to reliably prevent
　モータ部２（減速機付モータ１）に別途カバー等を設ける必要もないので、モータ部２（減速機付モータ１）の汎用性を高めることができるとともに、モータ部２（減速機付モータ１）の大型化を抑制できる。モータ部２（減速機付モータ１）の製造コストが増大してしまうことも防止できる。 Since it is not necessary to separately provide a cover or the like to the motor unit 2 (motor with reduction gear 1), the versatility of the motor unit 2 (motor with reduction gear) can be enhanced, and the motor unit 2 (motor with reduction gear 1) Can be suppressed. It is also possible to prevent an increase in the manufacturing cost of the motor unit 2 (motor 1 with speed reducer).
　リブ１１６は、内周面の形状が、ケーシング１０の段付き状の外周面に対応するように段付き状に形成されている。このため、ケーシング１０とリブ１１６との間の隙間を複雑な形状にできる。換言すれば、ケーシング１０とリブ１１６との間の入り込む塵埃や雨水等の侵入経路を複雑化できる。このため、防塵、防水性に優れた車両ホイール駆動装置１００を提供できる。 The rib 116 is formed in a stepped shape so that the shape of the inner peripheral surface corresponds to the stepped outer peripheral surface of the casing 10. For this reason, the gap between the casing 10 and the rib 116 can be formed in a complicated shape. In other words, it is possible to complicate the invading route of dust, rain water, etc. which enters between the casing 10 and the rib 116. For this reason, the vehicle wheel drive device 100 excellent in dust resistance and waterproofness can be provided.
　ホイール１０２のディスク部１０４に形成された長孔１１２と、ケーシング１０の取付ステー８１と、が軸方向で対向するように配置されている。このため、不図示の車体に車両ホイール駆動装置１００を取り付ける際、車幅方向外側から、不図示のボルトを、長孔１１２を介して取付ステー８１の貫通孔８１ａに挿入することができる。車幅方向外側から長孔１１２に不図示の工具を挿入し、不図示のボルトを締め付けることができる。よって、減速機付モータ１への駆動輪１０１の取付作業性を向上できる。 The elongated hole 112 formed in the disk portion 104 of the wheel 102 and the mounting stay 81 of the casing 10 are arranged to face each other in the axial direction. Therefore, when the vehicle wheel drive device 100 is attached to a vehicle body (not shown), a bolt (not shown) can be inserted into the through hole 81 a of the mounting stay 81 via the long hole 112 from the outside in the vehicle width direction. A tool (not shown) can be inserted into the long hole 112 from the outside in the vehicle width direction, and a bolt (not shown) can be tightened. Therefore, the attachment workability of the drive wheel 101 to the reduction gear motor 1 can be improved.
　減速機付モータ１のケーシング１０には、第１縮径部１１ａに、径方向外側に突出し、且つ第１段差面１１ｂ上に配置される複数（例えば、本実施形態では６つ）のボルト座１７が一体成形されている。各ボルト座１７の一面１７ａにステータ用雌ネジ部１７ｃを刻設するとともに、他面１７ｂのうち、ステータ用雌ネジ部１７ｃが刻設されていない箇所に外部機器用雌ネジ部１７ｄを刻設している。ボルト座１７の両面を活用して雌ネジ部１７ｃ，１７ｄを刻設することにより、ケーシング１０に対するステータ２１や外部機器の固定箇所を集約できる。このため、ケーシング１０を小型化できるとともに、ケーシング１０の意匠性を向上できる。 In the casing 10 of the motor 1 with a reduction gear, a plurality of (for example, six in the present embodiment) bolt seats that protrude outward in the radial direction to the first reduced diameter portion 11a and are disposed on the first step surface 11b. 17 is integrally molded. In addition to engraving female internal thread 17c for the stator on one surface 17a of each bolt seat 17, external female internal thread 17d is engraved on the other surface 17b where the female internal thread 17c for the stator is not engraved. doing. By engraving the female screw portions 17c and 17d by utilizing both surfaces of the bolt seat 17, it is possible to consolidate the fixing points of the stator 21 and the external device with respect to the casing 10. For this reason, while being able to miniaturize the casing 10, the designability of the casing 10 can be improved.
（第２実施形態）
　次に、図２、図３を援用し、図７、図８に基づいて、第２実施形態について説明する。なお、第１実施形態と同一態様には、同一符号を付して説明する（以下の変形例、及び第３実施形態についても同様）。
　図７は、第２実施形態における車両ホイール駆動装置２００の駆動輪２０１を断面とした図である。図８は、減速機付モータ１にモータカバー１２１を取り付けた状態を示す斜視図である。 Second Embodiment
Next, the second embodiment will be described based on FIGS. 7 and 8 with reference to FIGS. 2 and 3. The same aspects as those of the first embodiment will be described with the same reference numerals (the same applies to the following modifications and the third embodiment).
FIG. 7 is a cross-sectional view of the drive wheel 201 of the vehicle wheel drive device 200 according to the second embodiment. FIG. 8 is a perspective view showing a state in which the motor cover 121 is attached to the reduction gear motor 1.
　図７、図８に示すように、第２実施形態において、車両ホイール駆動装置２００は、減速機付モータ１と、減速機付モータ１の後述する出力部４４に取付けられている駆動輪２０１と、を備えている点は、前述の第１実施形態と同様である。減速機付モータ１は、モータ軸線Ｌが車幅方向（水平方向）に沿うように、且つ車体の車幅方向内側に減速機付モータ１が配置されるように取り付けられる点も、前述の第１実施形態と同様である。
　第２実施形態では、減速機付モータ１にモータカバー１２１を取り付けている。第２実施形態におけるホイール２０２のリブ２１６は、モータカバー１２１の形状に対応するように形成されている。これらの点が、前述の第１実施形態と相違する点である。 As shown in FIG. 7 and FIG. 8, in the second embodiment, the vehicle wheel drive device 200 includes a motor 1 with a reduction gear, and a drive wheel 201 attached to an output portion 44 described later of the motor 1 with a reduction gear. , Are similar to the first embodiment described above. The motor with a reduction gear 1 is also mounted such that the motor with a reduction gear 1 is disposed so that the motor axis L is along the vehicle width direction (horizontal direction) and inside the vehicle width direction of the vehicle body. It is the same as that of one embodiment.
In the second embodiment, the motor cover 121 is attached to the reduction gear motor 1. The rib 216 of the wheel 202 in the second embodiment is formed to correspond to the shape of the motor cover 121. These points are points different from the first embodiment described above.
　より具体的には、モータカバー１２１は、減速機付モータ１のボルト座１７（図２、図３参照）に、ボルト１２０（図７、図８参照）によって締結固定されている。モータカバー１２１は、ボルト座１７に固定される略円環状の固定部１２２と、固定部１２２から軸方向で駆動輪２０１側に向かって突出する略円筒状のカバー本体１２３と、カバー本体１２３の先端（駆動輪２０１側端、図７における右端）から径方向斜め内側に向かって徐々に縮径するように延出する内フランジ部１２４と、が一体成形されている。 More specifically, the motor cover 121 is fastened and fixed to a bolt seat 17 (see FIGS. 2 and 3) of the motor 1 with a reduction gear by bolts 120 (see FIGS. 7 and 8). The motor cover 121 includes a substantially annular fixing portion 122 fixed to the bolt seat 17, a substantially cylindrical cover main body 123 projecting toward the drive wheel 201 in the axial direction from the fixing portion 122, and a cover main body 123. An inner flange portion 124 extending so as to gradually decrease in diameter diagonally inward in the radial direction from the tip end (end on the driving wheel 201, right end in FIG. 7) is integrally formed.
　固定部１２２は、ケーシング１０の外周面のうち、ボルト座１７が形成されている段の外周面を覆うように、軸方向からみて略円環状に形成されている。固定部１２２は、外周壁１２２ａと、ボルト座１７の軸方向端面を覆う端壁１２２ｂと、により断面略Ｌ字状に形成されている。端壁１２２ｂの内周縁からカバー本体１２３が屈曲延出されている。 The fixing portion 122 is formed in a substantially annular shape as viewed from the axial direction so as to cover the outer peripheral surface of the step in which the bolt seat 17 is formed among the outer peripheral surfaces of the casing 10. The fixing portion 122 is formed in a substantially L-shaped cross section by an outer peripheral wall 122 a and an end wall 122 b covering an axial end surface of the bolt seat 17. The cover main body 123 is bent and extended from the inner peripheral edge of the end wall 122b.
　固定部１２２の外周壁１２２ａの外径は、ケーシング１０の外径とほぼ同一に設定されている。このため、外周壁１２２ａのボルト座１７に対応する位置には、このボルト座１７との干渉を回避するための切欠き部１２２ｃが形成されている。
　端壁１２２ｂには、ボルト座１７に対応する位置のうち、外部機器用雌ネジ部１７ｄが形成されている箇所に、ボルト１２０を挿通可能な不図示の貫通孔が形成されている。この貫通孔に、駆動輪２０１側からボルト１２０を挿通し、このボルト１２０を外部機器用雌ネジ部１７ｄに螺入することにより、ボルト座１７にモータカバー１２１が締結固定される。 The outer diameter of the outer peripheral wall 122 a of the fixing portion 122 is set to be substantially the same as the outer diameter of the casing 10. For this reason, the notch 122c for avoiding interference with this bolt seat 17 is formed in the position corresponding to the bolt seat 17 of the outer peripheral wall 122a.
In the end wall 122 b, a through hole (not shown) through which the bolt 120 can be inserted is formed at a position corresponding to the bolt seat 17 where the external device female screw 17 d is formed. By inserting a bolt 120 into the through hole from the drive wheel 201 side and screwing the bolt 120 into the external device female screw 17d, the motor cover 121 is fastened and fixed to the bolt seat 17.
　端壁１２２ｂとカバー本体１２３の外周面との間に、これら端壁１２２ｂとカバー本体１２３とに跨る補強用リブ１２７が複数形成されている。これら補強用リブ１２７は、モータカバー１２１の機械的強度を高める。
　カバー本体１２３の内径は、ケーシング１０の第１縮径部１１ａの外径よりも若干大きい程度に設定されている。 Between the end wall 122 b and the outer peripheral surface of the cover main body 123, a plurality of reinforcing ribs 127 straddling the end wall 122 b and the cover main body 123 are formed. The reinforcing ribs 127 enhance the mechanical strength of the motor cover 121.
The inner diameter of the cover main body 123 is set to be slightly larger than the outer diameter of the first reduced diameter portion 11 a of the casing 10.
　カバー本体１２３の先端に設けられた内フランジ部１２４は、内周縁の直径が減速機付モータ１に設けられているガイド部５６のガイド本体５７の外径よりも若干大きい程度となるように形成されている。内フランジ部１２４の内周縁には、円筒状の補強用リブ１２５が一体成形されている。この補強用リブ１２５は、内フランジ部１２４の機械的強度を高める。 The inner flange portion 124 provided at the front end of the cover main body 123 is formed so that the diameter of the inner peripheral edge is slightly larger than the outer diameter of the guide main body 57 of the guide portion 56 provided in the reduction gear motor 1 It is done. A cylindrical reinforcing rib 125 is integrally formed on the inner peripheral edge of the inner flange portion 124. The reinforcing rib 125 enhances the mechanical strength of the inner flange portion 124.
　ホイール２０２のリブ２１６は、モータカバー１２１の外周面のうち、補強用リブ１２５の先端からカバー本体１２３の先端部に至る間を覆うように略円筒状に形成されている。リブ２１６の内周面２１６ａは、モータカバー１２１の補強用リブ１２５の先端からカバー本体１２３の先端部に至る間の形状に対応するように形成されている。すなわち、リブ２１６の内周面は、ディスク部１０４から減速機付モータ１に向かうに従って徐々に拡径するように形成されている。このようにリブ２１６を形成することにより、このリブ２１６とモータカバー１２１とが径方向で重なる。 The rib 216 of the wheel 202 is formed in a substantially cylindrical shape so as to cover a portion of the outer peripheral surface of the motor cover 121 from the end of the reinforcing rib 125 to the end of the cover main body 123. The inner circumferential surface 216 a of the rib 216 is formed to correspond to the shape from the tip of the reinforcing rib 125 of the motor cover 121 to the tip of the cover main body 123. That is, the inner circumferential surface of the rib 216 is formed so as to gradually increase in diameter as it goes from the disk portion 104 to the motor 1 with a reduction gear. By forming the rib 216 in this manner, the rib 216 and the motor cover 121 overlap in the radial direction.
　上述の第２実施形態では、減速機付モータ１のケーシング１０にモータカバー１２１を設けるとともに、このモータカバー１２１の外周面の一部を覆うように、ホイール２０２のリブ２１６を形成している。モータカバー１２１の一部と、リブ２１６とを径方向で重なるようにしている。このため、モータカバー１２１の一部と、リブ２１６とにより、ラビリンス部１２６が形成される。よって、ケーシング１０とリブ２１６との間の入り込む塵埃や雨水等の侵入経路をさらに複雑化でき、さらに防塵、防水性に優れた車両ホイール駆動装置２００を提供できる。
　減速機付モータ１のモータカバー１２１とホイール２０２のリブ２１６とを併用することにより、モータカバー１２１のみで、防塵、防水性に優れた車両ホイール駆動装置２００を提供する場合と比較して、モータカバー１２１の構造を簡素化でき、モータカバー１２１を小型化できる。 In the second embodiment described above, the motor cover 121 is provided on the casing 10 of the reduction gear motor 1, and the rib 216 of the wheel 202 is formed so as to cover a part of the outer peripheral surface of the motor cover 121. A portion of the motor cover 121 and the rib 216 are arranged to overlap in the radial direction. Therefore, the labyrinth portion 126 is formed by a part of the motor cover 121 and the rib 216. Therefore, an intrusion path of dust, rain water, and the like between the casing 10 and the rib 216 can be further complicated, and a vehicle wheel drive device 200 excellent in dust resistance and water resistance can be provided.
By using the motor cover 121 of the reduction gear motor 1 and the rib 216 of the wheel 202 in combination, the motor cover 121 alone can provide a motor that is superior in dust resistance and waterproofness to the vehicle wheel drive device 200 as compared with the case of providing the motor The structure of the cover 121 can be simplified, and the motor cover 121 can be miniaturized.
　図９は、図７のＤ部拡大図である。
　上述の第２実施形態にあっては、モータカバー１２１は、略円筒状のカバー本体１２３と、カバー本体１２３の先端から径方向斜め内側に向かって徐々に縮径するように延出する内フランジ部１２４と、を有している。
　このため、図９に示すように、例えば、ホイール２０２の車幅方向内側（図９における左側）から雨水Ｗが侵入した場合、この雨水Ｗが自重によってモータカバー１２１の外周面を伝ってホイール２０２の径方向中央へと流れ込み、減速機付モータ１の出力部４４に到達する可能性がある（図９における矢印Ｙ参照）。そこで、モータカバー１２１を以下の変形例におけるモータカバー２２１のように構成してもよい。 FIG. 9 is an enlarged view of a portion D of FIG.
In the second embodiment described above, the motor cover 121 includes the substantially cylindrical cover main body 123 and an inner flange extending so as to gradually decrease in diameter diagonally inward from the tip end of the cover main body 123. And a unit 124.
Therefore, as shown in FIG. 9, for example, when rainwater W intrudes from the inner side in the vehicle width direction (left side in FIG. 9) of the wheel 202, the rainwater W travels along the outer peripheral surface of the motor cover 121 by its own weight and the wheel 202 And may reach the output portion 44 of the reduction gear motor 1 (see arrow Y in FIG. 9). Therefore, the motor cover 121 may be configured as a motor cover 221 in the following modification.
（第２実施形態の変形例）
　図１０は、第２実施形態の変形例における車両ホイール駆動装置２００の駆動輪２０１を断面とした図であって、前述の図７に対応している。
　同図に示すように、モータカバー２２１は、軸方向からみて略円環状の固定部２２２と、固定部２２２の外周縁から駆動輪２０１側に向かって突出するカバー本体２２３と、が一体成形されたものである。
　固定部２２２は、ボルト１２０によってボルト座１７に締結固定されている。カバー本体２２３は、固定部２２２の外周縁から駆動輪２０１側に向かうに従って徐々に湾曲しながら拡径するように末広がりに形成されている。 (Modification of the second embodiment)
FIG. 10 is a cross-sectional view of a drive wheel 201 of a vehicle wheel drive device 200 according to a modification of the second embodiment, corresponding to FIG. 7 described above.
As shown in the figure, the motor cover 221 is integrally formed with a substantially annular fixing portion 222 viewed from the axial direction and a cover main body 223 projecting from the outer peripheral edge of the fixing portion 222 toward the driving wheel 201 side. It is
The fixing portion 222 is fastened and fixed to the bolt seat 17 by a bolt 120. The cover main body 223 is formed so as to expand in diameter while gradually curving as it goes from the outer peripheral edge of the fixed portion 222 to the drive wheel 201 side.
　ホイール３０２のリブ３１６は、モータカバー２２１の内周面側に配置されている。リブ３１６は、略円筒状に形成されている。リブ３１６の外周面３１６ａは、カバー本体２２３の内周面２２３ａの形状に対応するように、湾曲形成されている。モータカバー２２１のカバー本体２２３とリブ３１６とが径方向で重なる。 The rib 316 of the wheel 302 is disposed on the inner peripheral surface side of the motor cover 221. The rib 316 is formed in a substantially cylindrical shape. The outer peripheral surface 316 a of the rib 316 is curved so as to correspond to the shape of the inner peripheral surface 223 a of the cover main body 223. The cover main body 223 of the motor cover 221 and the rib 316 overlap in the radial direction.
　モータカバー２２１のカバー本体２２３が末広がりに形成されているので、例えば、ホイール３０２の車幅方向内側（図１０における左側）から雨水Ｗが侵入した場合であっても、その自重でカバー本体２２３の外周面を伝ってホイール３０２の径方向内側に雨水Ｗが回り込んでしまうことがない。
　このため、上述の第２実施形態の変形例では、前述の第２実施形態と同様の効果に加え、減速機付モータ１の出力部４４に雨水等がかかってしまうことを、より確実に防止できる。 Since the cover main body 223 of the motor cover 221 is formed to widen, for example, even when rainwater W intrudes from the inner side in the vehicle width direction (left side in FIG. 10) of the wheel 302, the cover main body 223 is There is no possibility that the rainwater W may travel around the inner peripheral surface of the wheel 302 along the outer peripheral surface.
For this reason, in the modification of the above-mentioned second embodiment, in addition to the same effect as the above-mentioned second embodiment, it is prevented more reliably that rain water etc. will be applied to the output part 44 of the motor 1 it can.
　上述の第１実施形態、第２実施形態、及び第２実施形態の変形例では、ディスク部１０４の他面１０４ｂに、リブ１１６，２１６，３１６が一体成形されている場合について説明した。しかしながら、これに限られるものではなく、ディスク部１０４とリブ１１６，２１６，３１６とを別体で構成し、ディスク部１０４にリブ１１６，２１６，３１６を取り付けるように構成してもよい。 In the modification of the first embodiment, the second embodiment, and the second embodiment described above, the case where the ribs 116, 216, and 316 are integrally formed on the other surface 104b of the disk portion 104 has been described. However, the present invention is not limited to this, and the disk portion 104 and the ribs 116, 216, and 316 may be separately configured, and the ribs 116, 216, and 316 may be attached to the disk portion 104.
（第３実施形態）
　次に、図１１、図１２に基づいて、第３実施形態について説明する。
　図１１は、第３実施形態における車両ホイール駆動装置３００の断面図である。
　図１１に示すように、第３実施形態において、車両ホイール駆動装置３００は、減速機付モータ１と、駆動輪３０１と、を備えている点は、前述の第１実施形態と同様である。また、減速機付モータ１は、モータ軸線Ｌが車幅方向（水平方向）に沿うように、且つ車体の車幅方向内側に減速機付モータ１が配置されるように取り付けられる点も、前述の第１実施形態と同様である。 Third Embodiment
Next, a third embodiment will be described based on FIGS. 11 and 12.
FIG. 11 is a cross-sectional view of a vehicle wheel drive device 300 in the third embodiment.
As shown in FIG. 11, in the third embodiment, the vehicle wheel drive device 300 is the same as the first embodiment described above in that the vehicle wheel drive device 300 includes the motor 1 with a reduction gear and the drive wheels 301. In addition, the motor with a reduction gear 1 is also mounted such that the motor with a reduction gear 1 is disposed so that the motor axis L is along the vehicle width direction (horizontal direction) and inside the vehicle width direction of the vehicle body. Is the same as the first embodiment.
　第３実施形態では、減速機付モータ１の出力部４４の一部を構成するものとして、アタッチシャフト４００を備えている。出力部４４に、アタッチシャフト４００を介して駆動輪３０１が取り付けられている。第３実施形態では、駆動輪３０１に前述の第１実施形態、第２実施形態、及び第２実施形態の変形例のようにリブ１１６，２１６，３１６が設けられておらず、モータ部２に、モータカバー３２１が取り付けられている。これらの点が、前述の第１実施形態、第２実施形態、及び第２実施形態の変形例と相違する点である。 In the third embodiment, an attach shaft 400 is provided as a part of the output portion 44 of the motor 1 with a reduction gear. The drive wheel 301 is attached to the output unit 44 via the attach shaft 400. In the third embodiment, the ribs 116, 216, and 316 are not provided on the drive wheel 301 as in the first, second, and third embodiments described above. The motor cover 321 is attached. These points are different from the first embodiment, the second embodiment, and the modification of the second embodiment described above.
（アタッチシャフト）
　より具体的には、アタッチシャフト４００は、出力部４４の他面５１ｂに当接される略円板状のベース部４０１と、ベース部４０１の径方向中央から出力部４４とは反対側に向かって軸方向に沿って突出する出力軸４０２と、が一体成形されている。ベース部４０１の外周縁には、出力部４４の他面５１ｂに当接する一面４０１ａから突出する略円筒状のインロー部４０３が一体成形されている。インロー部４０３は、内周縁が出力部４４の出力部本体５１に外嵌されている。これにより、出力部４４に対するアタッチシャフト４００の径方向の位置決めが行われる。 (Attach shaft)
More specifically, the attach shaft 400 has a substantially disc-like base portion 401 that is in contact with the other surface 51 b of the output portion 44 and a direction from the radial center of the base portion 401 to the opposite side to the output portion 44 And an output shaft 402 projecting along the axial direction. On the outer peripheral edge of the base portion 401, a substantially cylindrical inlay portion 403 projecting from the one surface 401a that abuts on the other surface 51b of the output portion 44 is integrally formed. An inner peripheral edge of the inlay portion 403 is externally fitted to the output portion main body 51 of the output portion 44. Thereby, radial positioning of the attach shaft 400 with respect to the output unit 44 is performed.
　ベース部４０１には、出力部４４の雌ネジ部５４に対応する位置に、ボルト挿通孔４０４が形成されている。このボルト挿通孔４０４にボルト１１０を挿通し、出力部４４の雌ネジ部５４にボルト１１０を螺入することにより、出力部４４の他面５１ｂに、ベース部４０１の一面４０１ａが当接された状態で、出力部４４にアタッチシャフト４００が締結固定される。これにより、出力部４４とアタッチシャフト４００とが一体となって回転する。 A bolt insertion hole 404 is formed in the base portion 401 at a position corresponding to the female screw portion 54 of the output portion 44. One surface 401 a of the base portion 401 is in contact with the other surface 51 b of the output portion 44 by inserting the bolt 110 into the bolt insertion hole 404 and screwing the bolt 110 into the female screw portion 54 of the output portion 44 In the state, the attach shaft 400 is fastened and fixed to the output unit 44. Thereby, the output part 44 and the attach shaft 400 rotate integrally.
　ボルト挿通孔４０４には、ベース部４０１の一面４０１ａとは反対側の他面４０１ｂ側に、段差により拡径されたざぐり部４０４ａが形成されている。このざぐり部４０４ａにボルト１１０の頭部１１０ａが収納されるので、ベース部４０１の他面４０１ｂからボルト１１０の頭部１１０ａが突出することがない。 In the bolt insertion hole 404, on the other surface 401b side opposite to the one surface 401a of the base portion 401, a counterbore portion 404a expanded in diameter by a step is formed. Since the head portion 110 a of the bolt 110 is accommodated in the counterbore portion 404 a, the head portion 110 a of the bolt 110 does not protrude from the other surface 401 b of the base portion 401.
　ベース部４０１から突出された出力軸４０２は、軸心がモータ軸線Ｌ（出力部４４の回転軸線）と同軸上に位置するように配置されている。ベース部４０１の先端に、駆動輪３０１のホイール５０２が取り付けられている。 The output shaft 402 projected from the base portion 401 is disposed so that the axis is coaxial with the motor axis L (the rotation axis of the output portion 44). The wheel 502 of the drive wheel 301 is attached to the tip of the base portion 401.
（モータカバー）
　モータ部２に取り付けられたモータカバー３２１は、減速機付モータ１のボルト座１７に、ボルト１２０によって締結固定されている。 (Motor cover)
A motor cover 321 attached to the motor unit 2 is fastened and fixed to a bolt seat 17 of the motor 1 with a reduction gear by a bolt 120.
　図１２は、モータカバー３２１の斜視図である。
　図１１、図１２にしめすように、モータカバー３２１は、ボルト座１７に固定される略円環状の固定部３２２を有している。固定部３２２には、減速機付モータ１のボルト座１７に対応する位置に、台座３２３が径方向外側に向かって突出形成されている。この台座３２３にボルト１２０を挿通可能な貫通孔３２３ａが形成されている。この貫通孔３２３ａに、ボルト１２０を挿入し、このボルト１２０の先端をボルト座１７の外部機器用雌ネジ部１７ｄに螺入することにより、ケーシング１０に、モータカバー３２１が締結固定される。 FIG. 12 is a perspective view of the motor cover 321. As shown in FIG.
As shown in FIGS. 11 and 12, the motor cover 321 has a substantially annular fixing portion 322 fixed to the bolt seat 17. A pedestal 323 is formed protruding outward in the radial direction at a position corresponding to the bolt seat 17 of the motor 1 with a reduction gear. A through hole 323 a through which the bolt 120 can be inserted is formed in the pedestal 323. The motor cover 321 is fastened and fixed to the casing 10 by inserting the bolt 120 into the through hole 323 a and screwing the tip of the bolt 120 into the external device female screw portion 17 d of the bolt seat 17.
　固定部３２２の内周縁には、駆動輪３０１側に向かって突出する略円筒状の第１円筒部３２４が一体成形されている。第１円筒部３２４は、固定部３２２側の基端部がケーシング１０の第１縮径部１１ａに外嵌されている。
　第１円筒部３２４の固定部３２２とは反対側の先端側には、減速機付モータ１のモータ軸線Ｌを水平方向に沿わせた状態で重力方向最下部（図１１における下部）となる箇所に、水抜き部３３０が設けられている。 A substantially cylindrical first cylindrical portion 324 that protrudes toward the drive wheel 301 is integrally formed on the inner peripheral edge of the fixed portion 322. The base end of the first cylindrical portion 324 on the fixing portion 322 side is externally fitted to the first reduced diameter portion 11 a of the casing 10.
On the tip end side opposite to the fixed portion 322 of the first cylindrical portion 324, a portion which becomes the lowermost portion in the direction of gravity (lower portion in FIG. 11) with the motor axis L of the motor with reduction gear horizontally , The water draining portion 330 is provided.
　水抜き部３３０は、第１円筒部３２４に形成された水抜き孔３３１と、水抜き孔３３１を径方向外側から覆う保護カバー３３２と、により構成されている。水抜き孔３３１は、径方向からみて略四角形状に形成されており、第１円筒部３２４の内外を連通している。保護カバー３３２は、モータ部２側（図１１における右側）に開口部３３２ａを有する箱状に形成されている。すなわち、保護カバー３３２は、第１円筒部３２４から下方に向けて突出し、重力方向からみて略Ｃ字状に配置される３つの側壁３３２ｂと、３つの側壁３３２ｂの下端にそれぞれ跨る底壁３３２ｃと、を有している。 The water draining portion 330 is constituted by a water draining hole 331 formed in the first cylindrical portion 324, and a protective cover 332 which covers the water draining hole 331 from the outer side in the radial direction. The drain hole 331 is formed in a substantially square shape as viewed in the radial direction, and communicates the inside and the outside of the first cylindrical portion 324. The protective cover 332 is formed in a box shape having an opening 332 a on the motor unit 2 side (right side in FIG. 11). That is, the protective cover 332 protrudes downward from the first cylindrical portion 324, and includes three side walls 332b arranged substantially in a C shape as viewed from the direction of gravity, and a bottom wall 332c straddling lower ends of the three side walls 332b. ,have.
　第１円筒部３２４の先端には、段差面３２５を介して第１円筒部３２４よりも縮径形成された第２円筒部３２６が一体成形されている。第２円筒部３２６の内径は、アタッチシャフト４００のベース部４０１の外径よりも大きく設定されている。
　第２円筒部３２６の段差面３２５とは反対側の先端には、略円板状の天板３２７が一体成形されている。天板３２７のベース部４０１側の一面３２７ａは、ベース部４０１の他面４０１ｂに当接されている。天板３２７の径方向中央には、アタッチシャフト４００の出力軸４０２を挿通可能な貫通孔３２８が形成されている。この貫通孔３２８を介して出力軸４０２の先端がモータカバー３２１から突出されている。 A second cylindrical portion 326, which has a diameter smaller than that of the first cylindrical portion 324 via the step surface 325, is integrally formed at the tip of the first cylindrical portion 324. The inner diameter of the second cylindrical portion 326 is set larger than the outer diameter of the base portion 401 of the attach shaft 400.
A substantially disc-like top plate 327 is integrally formed at the tip of the second cylindrical portion 326 on the opposite side to the step surface 325. One surface 327 a of the top plate 327 on the side of the base portion 401 is in contact with the other surface 401 b of the base portion 401. A through hole 328 through which the output shaft 402 of the attach shaft 400 can be inserted is formed at the center of the top plate 327 in the radial direction. The tip of the output shaft 402 is protruded from the motor cover 321 through the through hole 328.
　天板３２７の一面３２７ａとは反対側の他面３２７ｂには、貫通孔３２８の周縁よりやや径方向外側から突出する第３内円筒部３３３が形成されている。天板３２７の他面３２７ｂには、第３内円筒部３３３よりも径方向外側に、第３外円筒部３３４が突出形成されている。第３外円筒部３３４の突出高さは、第３内円筒部３３３の突出高さよりも低く設定されている。これら第３内円筒部３３３及び第３外円筒部３３４は、後述のシール部３４０と協働してラビリンス部３４３を形成している。 On the other surface 327 b opposite to the one surface 327 a of the top plate 327, a third inner cylindrical portion 333 is formed which protrudes slightly radially outward from the peripheral edge of the through hole 328. A third outer cylindrical portion 334 is formed on the other surface 327 b of the top plate 327 so as to project radially outward of the third inner cylindrical portion 333. The protruding height of the third outer cylindrical portion 334 is set to be lower than the protruding height of the third inner cylindrical portion 333. The third inner cylindrical portion 333 and the third outer cylindrical portion 334 cooperate with a seal portion 340 described later to form a labyrinth portion 343.
　アタッチシャフト４００の出力軸４０２には、先端側にシール部３４０が取り付けられている。
　シール部３４０は、ホイール５０２の一部を構成するものであり、弾性を有するゴムにより形成されている。シール部３４０は、第３内円筒部３３３をホイール５０２側から覆うように形成されている。すなわち、シール部３４０は、出力軸４０２に取り付けられる円板部３４１と、円板部３４１の外周部からモータカバー３２１の天板３２７に向かって突出するシール円筒部３４２と、が一体成形されている。 A seal portion 340 is attached to the tip end side of the output shaft 402 of the attach shaft 400.
The seal portion 340 constitutes a part of the wheel 502, and is formed of elastic rubber. The seal portion 340 is formed to cover the third inner cylindrical portion 333 from the wheel 502 side. That is, in the seal portion 340, the disc portion 341 attached to the output shaft 402 and the seal cylindrical portion 342 projecting toward the top plate 327 of the motor cover 321 from the outer peripheral portion of the disc portion 341 are integrally formed. There is.
　円板部３４１の径方向中央には、貫通孔３４１ａが形成されている。この貫通孔３４１ａに、出力軸４０２が圧入されている。これにより、出力軸４０２にシール部３４０が固定される。 A through hole 341 a is formed at the radial center of the disc portion 341. The output shaft 402 is press-fitted into the through hole 341a. Thereby, the seal portion 340 is fixed to the output shaft 402.
　シール円筒部３４２の先端は、モータカバー３２１の第３内円筒部３３３と第３外円筒部３３４との間に介在されている。シール円筒部３４２と天板３２７の他面３２７ｂとの間には、所定の間隙Ｋ１が形成される。また、シール円筒部３４２の内周面と第３内円筒部３３３の外周面との間にも、軸方向からみて環状の間隙Ｋ２が形成される。さらに、シール円筒部３４２の外周面と第３外円筒部３３４の内周面との間にも、軸方向からみて環状の間隙Ｋ３が形成される。そして、これら間隙Ｋ１～Ｋ３、及び間隙Ｋ１～Ｋ３を形成する天板３２７、第３内円筒部３３３、第３外円筒部３３４、シール部３４０によって、雨水等の侵入経路が複雑なラビリンス部３４３が形成される。 The tip of the seal cylindrical portion 342 is interposed between the third inner cylindrical portion 333 and the third outer cylindrical portion 334 of the motor cover 321. A predetermined gap K1 is formed between the seal cylindrical portion 342 and the other surface 327b of the top plate 327. Further, an annular gap K2 is formed between the inner peripheral surface of the seal cylindrical portion 342 and the outer peripheral surface of the third inner cylindrical portion 333 as viewed in the axial direction. Further, an annular gap K3 is formed between the outer peripheral surface of the seal cylindrical portion 342 and the inner peripheral surface of the third outer cylindrical portion 334 as viewed in the axial direction. And, by the top plate 327, the third inner cylindrical portion 333, the third outer cylindrical portion 334, and the seal portion 340 forming the gaps K1 to K3 and the gaps K1 to K3, a labyrinth portion 343 having a complicated intrusion path such as rain water. Is formed.
　このような構成のもと、減速機付モータ１を駆動させると、出力部４４と一体となってアタッチシャフト４００、及び駆動輪３０１が回転する。このとき、アタッチシャフト４００に固定されているシール部３４０も、アタッチシャフト４００と一体となって回転する。シール部３４０とモータカバー３２１との間には、所定の間隙Ｋ１～Ｋ３が形成されているので、シール部３４０とモータカバー３２１との間に摺動抵抗が生じることがない。 With such a configuration, when the motor with a reduction gear 1 is driven, the attach shaft 400 and the drive wheel 301 rotate integrally with the output unit 44. At this time, the seal portion 340 fixed to the attach shaft 400 also rotates integrally with the attach shaft 400. Since predetermined gaps K1 to K3 are formed between the seal portion 340 and the motor cover 321, sliding resistance does not occur between the seal portion 340 and the motor cover 321.
　また、シール部３４０とモータカバー３２１との間には、ラビリンス部３４３が形成されているので、このラビリンス部３４３における外部からモータカバー３２１内への雨水の侵入経路が複雑である。このため、シール部３４０とモータカバー３２１との間の防水性が保たれる。 Further, since the labyrinth portion 343 is formed between the seal portion 340 and the motor cover 321, an intrusion path of rainwater from the outside into the motor cover 321 in the labyrinth portion 343 is complicated. Therefore, the waterproofness between the seal portion 340 and the motor cover 321 is maintained.
　仮に、モータカバー３２１内に雨水等が侵入したり、モータカバー３２１内が結露したりした場合、水滴は、モータカバー３２１の内周面を伝って重力方向下部に移動する。この下部に移動した水滴は、水抜き部３３０を介して外部に排出される。 If rainwater or the like intrudes into the motor cover 321 or dew condensation occurs in the motor cover 321, the water droplets move along the inner circumferential surface of the motor cover 321 to the lower side in the direction of gravity. The water droplets moved to the lower part are discharged to the outside through the water draining part 330.
　水抜き部３３０は、水抜き孔３３１を覆うように箱状の保護カバー３３２を有している。この保護カバー３３２は、水平方向の一面に開口部３３２ａ形成されているだけなので、水抜き孔３３１を介して外部に水滴をスムーズに排出しつつ、外部から水抜き部３３０を介してモータカバー３２１内に雨水等が侵入してしまうことを抑制できる。このため、防塵、防水性に優れた車両ホイール駆動装置３００を提供できる。 The drainage portion 330 has a box-like protective cover 332 so as to cover the drainage hole 331. The protective cover 332 is only formed with an opening 332 a on one surface in the horizontal direction, so that water droplets are smoothly discharged to the outside through the water drain hole 331 and the motor cover 321 from the outside through the water drain portion 330. It can control that rain water etc. invade inside. Therefore, it is possible to provide a vehicle wheel drive device 300 excellent in dust resistance and water resistance.
　モータ部２や減速機構４は、ケーシング１０と、このケーシング１０に締結固定されるモータカバー３２１とにより、完全に覆われる。このため、前述の第１実施形態や第２実施形態と比較して、モータ部２や減速機構４への雨水や塵埃の侵入を、確実に防止できる。 The motor unit 2 and the reduction mechanism 4 are completely covered by the casing 10 and the motor cover 321 fastened and fixed to the casing 10. For this reason, as compared with the first and second embodiments described above, intrusion of rain water and dust into the motor unit 2 and the speed reduction mechanism 4 can be reliably prevented.
　モータカバー３２１は、固定部３２２、第１円筒部３２４、段差面３２５、第２円筒部３２６、及び天板３２７を主構成としており、ケーシング１０、減速機構４、及びアタッチシャフト４００の外周面形状に沿うように段付き状に形成されている。このため、モータカバー３２１の占有スペースを極力省スペース化しつつ、モータ部２や減速機構４に直接塵埃や雨水等がかかるのを防止できる。 The motor cover 321 mainly includes the fixing portion 322, the first cylindrical portion 324, the step surface 325, the second cylindrical portion 326, and the top plate 327, and the outer peripheral surface shape of the casing 10, the speed reduction mechanism 4 and the attach shaft 400. It is formed in the shape of a step along the line. As a result, the space occupied by the motor cover 321 can be saved as much as possible, and direct application of dust, rain water or the like to the motor unit 2 or the reduction mechanism 4 can be prevented.
　本発明は上述の実施形態に限られるものではなく、本発明の趣旨を逸脱しない範囲において、上述の実施形態に種々の変更を加えたものを含む。 The present invention is not limited to the above-described embodiment, and includes the above-described embodiment with various modifications added thereto, without departing from the spirit of the present invention.
　例えば、上述の実施形態では、減速機付モータ１は、いわゆるＤＣブラシレスモータとして構成された偏平形状のモータ部２と、モータ部２の駆動制御を行う制御部３と、モータ部２の回転力を受けて駆動する減速機構４と、を備えている場合について説明した。また、減速機構４は、いわゆるハイポサイクロイド減速機構として構成されている場合について説明した。しかしながら、これらに限られるものではなく、さまざまなモータ、減速機構を採用することができる。 For example, in the above-described embodiment, the motor with a reduction gear 1 is a flat motor unit 2 configured as a so-called DC brushless motor, a control unit 3 that performs drive control of the motor unit 2, and rotational force of the motor unit 2 , And the speed reduction mechanism 4 to be driven. Moreover, the case where the reduction mechanism 4 is configured as a so-called hypocycloid reduction mechanism has been described. However, the present invention is not limited to these, and various motors and reduction mechanisms can be employed.
　上述の第１実施形態、及び第２実施形態において、減速機構４の出力部４４に、駆動輪１０１，２０１のホイール１０２，２０２，３０２が締結固定される場合について説明した。しかしながら、例えば、さまざまな回転電機を用いる場合、ホイール１０２，２０２，３０２に設けられたリブ１１６，２１６，３１６の形状を、採用する回転電機の外郭形状に応じて変更すればよい。 In the first embodiment and the second embodiment described above, the case where the wheels 102, 202, and 302 of the drive wheels 101 and 201 are fastened and fixed to the output portion 44 of the speed reduction mechanism 4 has been described. However, for example, in the case of using various rotating electrical machines, the shapes of the ribs 116, 216, and 316 provided on the wheels 102, 202, 302 may be changed according to the outer shape of the rotating electrical machine to be adopted.
　上述の実施形態では、回転体として、駆動輪１０１を採用した場合について説明した。しかしながら、これに限られるものではなく、回転体として種々採用することが可能である。 In the above-mentioned embodiment, the case where drive wheel 101 was adopted as a rotation body was explained. However, the present invention is not limited to this, and various kinds of rotating bodies can be adopted.
　上述の第３実施形態においては、モータカバー３２１は、固定部３２２、第１円筒部３２４、段差面３２５、第２円筒部３２６、及び天板３２７を主構成としており、ケーシング１０、減速機構４、及びアタッチシャフト４００の外周面形状に沿うように段付き状に形成されている場合について説明した。しかしながら、これに限られるものではなく、採用する回転電機の外郭形状に応じ、モータカバー３２１の形状を変更すればよい。 In the above-described third embodiment, the motor cover 321 mainly includes the fixing portion 322, the first cylindrical portion 324, the step surface 325, the second cylindrical portion 326, and the top plate 327. And the case where it formed in step shape so that the outer peripheral surface shape of the attach shaft 400 might be followed was demonstrated. However, the present invention is not limited to this, and the shape of the motor cover 321 may be changed according to the outer shape of the rotating electrical machine to be adopted.
　上述の第３実施形態では、アタッチシャフト４００における出力軸４０２の先端側に、シール部３４０が取り付けられている場合について説明した。しかしながら、これに限られるものではなく、ホイール５０２に、直接シール部３４０を設けてもよい。 In the third embodiment described above, the case where the seal portion 340 is attached to the tip end side of the output shaft 402 in the attach shaft 400 has been described. However, the present invention is not limited to this, and the wheel 502 may be provided with the seal part 340 directly.
　上記の駆動装置によれば、防水カバーによって、モータ部に直接塵埃や雨水等がかかるのを防止できる。このため、防塵、防水性に優れた駆動装置を提供できる。 According to the above-described drive device, the waterproof cover can prevent dust, rain water, and the like from being directly applied to the motor unit. For this reason, the drive device excellent in dust resistance and waterproofness can be provided.
１…減速機付モータ、２…モータ部、４…減速機構（減速部）、１０…ケーシング（モータケース）、１０ａ…外周面、１１ａ…第１縮径部、１１ｂ…第１段差面（段差）、１２ａ…第２縮径部、１２ｂ…第２段差面（段差）、４４…出力部（出力軸）、１００，２００，３００…車両ホイール駆動装置（駆動装置）、駆動輪１０１…駆動輪（回転体）、１０２，２０２，３０２，５０２…ホイール、１０３…タイヤ、１０４…ディスク部、１０５…リム部、１１６，２１６，３１６…リブ（防水カバー）、２１６ａ…内周面、１２１，２２１…モータカバー（第１モータカバー、防水カバー）、３２１…モータカバー（第２モータカバー、防水カバー）、３２２…固定部（カバー本体）、３２４…第１円筒部（カバー本体）、３２５…段差面（カバー本体）、３２６…第２円筒部（カバー本体）、３３０…水抜き部、３３１…水抜き孔、３３２…保護カバー、３３２ａ…開口部（開口）、３３３…第３内円筒部（出力軸カバー部）、３３４…第３外円筒部、３４０…シール部（回転体）、３４３…ラビリンス部、４００…アタッチシャフト（出力軸） DESCRIPTION OF SYMBOLS 1 ... motor with reduction gear, 2 ... motor part, 4 ... reduction mechanism (deceleration part) 10 ... casing (motor case), 10a ... outer peripheral surface, 11a ... 1st diameter reduction part, 11b ... 1st level difference surface (step difference 12a: second diameter reduction portion 12b: second step surface (step) 44: output portion (output shaft) 100, 200, 300: vehicle wheel drive device (drive device), drive wheel 101: drive wheel (Rotary body) 102, 202, 302, 502 Wheel, 103 Tire, 104 Disc portion 105 Rim portion 116, 216, 316 Rib (waterproof cover) 216a Inner circumferential surface 121, 221 ... motor cover (first motor cover, waterproof cover), 321 ... motor cover (second motor cover, waterproof cover), 322 ... fixing portion (cover body), 324 ... first cylindrical portion (cover body), 325 ... level difference (Cover main body), 326: second cylindrical portion (cover main body), 330: water draining portion, 331: water draining hole, 332: protective cover, 332a: opening portion (opening), 333: third inner cylindrical portion (output Shaft cover part), 334 ... third outer cylinder part, 340 ... seal part (rotary body), 343 ... labyrinth part, 400 ... attach shaft (output shaft)

Claims (6)

  1. 　一方向に向かうに従って漸次段差を介して縮径形成されたモータケースを有するモータ部と、
    　前記モータケースの最も前記一方向側に配置され、前記モータ部の出力を減速して出力する出力軸を有する減速部と、
    　前記減速部よりも前記一方向側に配置され、前記出力軸に連結されて回転する回転体と、
    を備え、
    　前記モータ部、及び前記回転体の少なくともいずれか一方に、前記モータケースの周囲を取り囲むように形成された防水カバーを設け、
    　前記防水カバーの内周面は、前記モータケースの外周面に沿うように、段付き状に形成されている
    駆動装置。     A motor unit having a motor case that is gradually reduced in diameter along a level difference toward one direction;
    A speed reduction unit disposed on the most one side of the motor case and having an output shaft that decelerates and outputs an output of the motor unit;
    A rotating body disposed on the one side with respect to the speed reducing portion and coupled to the output shaft to rotate;
    Equipped with
    A waterproof cover formed to surround the periphery of the motor case is provided on at least one of the motor unit and the rotating body.
    The drive device is formed in a stepped shape so that the inner peripheral surface of the waterproof cover is along the outer peripheral surface of the motor case.
  2. 　前記回転体はホイールであり、
    　前記出力軸に固定される円板状のディスク部と、
    　該ディスク部の外周部から前記出力軸の軸方向に沿って延出し、タイヤが取付けられるリム部と、
    　を有し、
    　前記ディスク部に、前記モータ部の周囲を取り囲むリブが設けられており、
    　前記リブが、前記防水カバーである
    請求項１に記載の駆動装置。     The rotating body is a wheel,
    A disc-shaped disc portion fixed to the output shaft;
    A rim portion extending from an outer peripheral portion of the disc portion along an axial direction of the output shaft, to which a tire is attached;
    Have
    The disk portion is provided with a rib surrounding the periphery of the motor portion,
    The drive device according to claim 1, wherein the rib is the waterproof cover.
  3. 　前記モータ部に、前記ディスク部に向かって突出する筒状の第１モータカバーを設け、
    　該第１モータカバーと前記リブは、少なくとも一部が前記出力軸の径方向で重なっており、
    　前記第１モータカバー、及び前記リブが、前記防水カバーである請求項２に記載の駆動装置。     The motor unit is provided with a cylindrical first motor cover projecting toward the disc unit,
    At least a part of the first motor cover and the rib overlap in the radial direction of the output shaft,
    The drive device according to claim 2, wherein the first motor cover and the rib are the waterproof cover.
  4. 　前記モータ部に、第２モータカバーを設け、
    　前記第２モータカバーは、
    　　前記モータケースの外周面に沿うように段付き状に形成されたカバー本体と、
    　　前記カバー本体から前記一方向側に突出された前記出力軸の周囲を取り囲むように筒状に形成された出力軸カバー部と、
    　を備えており、
    　前記第２モータカバーが、前記防水カバーである
    請求項１に記載の駆動装置。     Providing a second motor cover on the motor unit;
    The second motor cover is
    A cover main body formed in a stepped shape along the outer peripheral surface of the motor case;
    An output shaft cover portion formed in a tubular shape so as to surround the periphery of the output shaft projected from the cover main body in the one direction;
    Equipped with
    The drive device according to claim 1, wherein the second motor cover is the waterproof cover.
  5. 　前記回転体は、前記出力軸カバー部を前記一方向側から覆うシール部を有し、
    　前記シール部と前記出力軸カバー部とにより、環状の間隙からなるラビリンス部を形成した
    請求項４に記載の駆動装置。     The rotating body has a seal portion that covers the output shaft cover portion from the one direction side,
    The drive device according to claim 4, wherein a labyrinth portion having an annular gap is formed by the seal portion and the output shaft cover portion.
  6. 　前記モータ部、及び前記減速部は、軸方向が水平方向に沿うように配置され、
    　前記カバー本体の重力方向下部には、水抜き部が形成されており、
    　前記水抜き部は、
    　　前記カバー本体の側面に形成された水抜き孔と、
    　　前記カバー本体の前記側面に、前記水抜き孔を径方向外側から覆うように形成され、前記水平方向の一面が開口されている箱状の保護カバーと、
    　からなる
    請求項４又は請求項５に記載の駆動装置。     The motor unit and the speed reduction unit are disposed such that the axial direction is along the horizontal direction,
    A draining portion is formed in the lower part of the cover body in the direction of gravity,
    The drainage portion is
    A drain hole formed on the side surface of the cover body;
    A box-shaped protective cover which is formed on the side surface of the cover main body so as to cover the drainage hole from the outer side in the radial direction, and in which one surface in the horizontal direction is opened;
    The driving device according to claim 4 or 5, comprising:
PCT/JP2018/036894 2017-10-16 2018-10-02 Drive device WO2019077996A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880066981.6A CN111213305B (en) 2017-10-16 2018-10-02 Drive device
US16/756,126 US11355990B2 (en) 2017-10-16 2018-10-02 Drive device

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JP2017200265 2017-10-16
JP2017-200265 2017-10-16
JP2018-100946 2018-05-25
JP2018100946A JP7078455B2 (en) 2017-10-16 2018-05-25 Drive

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992855U (en) * 1982-12-15 1984-06-23 日産自動車株式会社 Turbocharger rotation speed detection device for internal combustion engine
JPH0617352U (en) * 1992-08-05 1994-03-04 株式会社三ツ葉電機製作所 Fan motor waterproof structure
JPH0796752A (en) * 1993-09-28 1995-04-11 Honda Motor Co Ltd Wheel motor
JP2015113076A (en) * 2013-12-13 2015-06-22 東洋ゴム工業株式会社 Tire wheel assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992855U (en) * 1982-12-15 1984-06-23 日産自動車株式会社 Turbocharger rotation speed detection device for internal combustion engine
JPH0617352U (en) * 1992-08-05 1994-03-04 株式会社三ツ葉電機製作所 Fan motor waterproof structure
JPH0796752A (en) * 1993-09-28 1995-04-11 Honda Motor Co Ltd Wheel motor
JP2015113076A (en) * 2013-12-13 2015-06-22 東洋ゴム工業株式会社 Tire wheel assembly

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