WO2019188034A1 - Connection structure for in-wheel motor drive device and power line - Google Patents

Connection structure for in-wheel motor drive device and power line Download PDF

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Publication number
WO2019188034A1
WO2019188034A1 PCT/JP2019/008564 JP2019008564W WO2019188034A1 WO 2019188034 A1 WO2019188034 A1 WO 2019188034A1 JP 2019008564 W JP2019008564 W JP 2019008564W WO 2019188034 A1 WO2019188034 A1 WO 2019188034A1
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WO
WIPO (PCT)
Prior art keywords
power line
terminal box
side region
wheel motor
drive device
Prior art date
Application number
PCT/JP2019/008564
Other languages
French (fr)
Japanese (ja)
Inventor
愛子 妙木
真也 太向
Original Assignee
Ntn株式会社
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
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2019188034A1 publication Critical patent/WO2019188034A1/en

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    • 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
    • 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
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • 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
    • H02K5/06—Cast metal casings
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • 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
    • 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
    • H02K7/003—Couplings; Details of shafts
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to an in-wheel motor drive device for driving wheels, and more particularly to a structure for connecting and fixing a power line to the in-wheel motor drive device.
  • Patent Document 1 As a connection structure between an in-wheel motor and a power line (also referred to as a power feeding cable or an electric wire), for example, a structure described in Japanese Patent Application Laid-Open No. 2011-000961 (Patent Document 1) is known.
  • a terminal box is attached to a casing of an in-wheel motor drive device, and three power supply cables are connected to the terminal box.
  • the outer peripheral surface of the terminal portion of each power supply cable line is covered with a resin molded body.
  • a bracket is provided on the resin molded body.
  • the bracket is a metal plate and has a fixing hole.
  • Female screw holes are formed in the upper surfaces of the in-wheel motor terminal boxes corresponding to the positions of these fixing holes. Then, the bolt passes through the fixing hole of the bracket and is screwed into the female screw hole of the terminal box.
  • Patent Document 1 describes that the bracket serves as both an electrical grounding material and a structural fixing material.
  • Patent Document 1 Since the resin molded body of Patent Document 1 is made of resin, there is a concern about durability and insufficient strength. Therefore, it is possible to secure the strength by fitting a metal power line fixing member to the outer peripheral surface of the end of the power line connected to the in-wheel motor and fixing the power line fixing member to the metal casing of the in-wheel motor. It is preferable from the viewpoint of durability. If the metal power line fixing member is connected to the casing of the metal wire, the power line fixing member functions as a ground, so that charging of the power line fixing member is prevented.
  • the bracket of Patent Document 1 is a metal plate and is in surface contact with the surface of the terminal box. Although the surface of such a plate material is in close contact with the surface of the terminal box in principle by the tightening force of the bolt, there is a risk that rainwater or salt water will invade the surface where the tightening force of the bolt does not reach and gradually corrode.
  • the metal bracket and bolt of Patent Document 1 and the metal power line fixing member described above are subjected to a plating process having a high rust prevention effect, for example, a plating process related to Geomet (registered trademark). It is conceivable to form a film on the surface or to apply a surface treatment to cover with a resinous thin film. Such corrosion countermeasures do not guarantee the conductivity. Then, there is a problem that the metal bracket and the metal power line fixing member do not function as a ground.
  • the present invention aims to provide a technology that secures strength and durability in a structure in which a power line is connected and fixed to an in-wheel motor drive device, and further provides both a grounding function and a corrosion countermeasure.
  • the in-wheel motor drive device and power line connection structure includes a terminal box defined by a metal wall provided in a casing of the in-wheel motor drive device, and an external portion of the in-wheel motor drive device.
  • a power line that extends from the end and is inserted into the terminal box and supplies power to the in-wheel motor drive device, a cylindrical portion that fits to the outer peripheral surface of the power line, and a flange portion that is provided on the cylindrical portion
  • the end face of the flange part is a fixed side area that is close to the fixing means and far from the cylindrical part, and conversely, a power line side area that is far from the fixing means and close to the cylindrical part, and surrounds the cylindrical part, and the fixed side area and the power line side area
  • the fixed side region and the power line side region are abutted against the surface of the metal wall of the terminal box, and the boundary region is separated from the surface of the metal wall of the terminal box.
  • the power line fixing member is made of metal, the strength of the power line fixing member is increased and the durability is improved. Further, the end face of the flange portion of the power line fixing member is not entirely brought into contact with the surface of the terminal box, but is separated from the surface of the terminal box by the boundary region. Therefore, it is possible to reduce the risk of rainwater entering the abutting surface by reducing the abutting surface. Even if rainwater or the like enters the abutting surface, such rainwater can be discharged to the boundary region.
  • the grounding function of the power line fixing member can be obtained by connecting the flange portion of the power line fixing member to the surface of the terminal box in the power line side region and / or the fixed side region, and charging of the power line fixing member can be prevented.
  • a portion of the wall of the terminal box that overlaps with the flange portion of the power line fixing member may be formed with a hollow portion to make the surface concave.
  • the arrangement of the lightening portion corresponds to at least the boundary portion of the end face of the flange portion. Thereby, the boundary region of the end face of the flange portion is separated from the surface of the terminal box.
  • the casing of the in-wheel motor drive device is made of metal and is electrically connected to the metal wall of the terminal box.
  • a sealing material may be interposed between the fixed-side region of the end faces of the flange portions that face each other and the surface of the terminal box.
  • a sealing material may be interposed between the power line side regions of the end faces of the flange portions that are faced to each other and the surface of the terminal box.
  • the sealing material is a hardened liquid gasket. According to this aspect, since the excess liquid gasket remains in the boundary region, the uncured liquid gasket does not enter the fixed side region. Therefore, the flange end face and the terminal box surface can be electrically and reliably connected in the fixed region.
  • the sealing material is a sheet made of an elastic body, for example, a rubber sheet.
  • the sealing material is a resin sheet other than the elastic body.
  • the means for fixing the flange portion of the power line fixing member to the surface of the terminal box is not particularly limited.
  • the fixing means includes a screw hole formed in the terminal box, a through hole formed in a part of the flange portion, and a bolt that is passed through the through hole and screwed into the screw hole.
  • the bolt is then subjected to a surface rust prevention treatment.
  • corrosion of the bolt can be prevented and the durable life of the fixing means is increased.
  • the bolt surface rust prevention treatment is, for example, zinc plating treatment, chrome plating treatment, nickel plating treatment, or surface treatment by Geomet (registered trademark), and a bolt is formed on the bolt surface to protect the bolt. Or it is surface treatment which forms the thin film which consists of resin on the volt
  • the bolt of the fixing means is not subjected to surface rust prevention treatment.
  • the terminal box is preferably formed integrally with the casing of the in-wheel motor drive device.
  • the walls defining the casing and the terminal box of the in-wheel motor drive device are made of light metal.
  • the light metal is a metal mainly composed of aluminum, for example, an aluminum alloy.
  • the metal wall of the terminal box and the power line fixing member are made of the same material. According to this aspect, there is no difference in ionization tendency between the power line fixing member and the terminal box that are in contact with each other, and one of the butted surfaces can be prevented from being significantly corroded than the other.
  • An example of such a material is a metal (aluminum alloy) containing aluminum as a main component. This can reduce the weight of the in-wheel motor drive device, which is advantageous in terms of cost.
  • the cylindrical portion of the power line fixing member is subjected to surface rust prevention treatment.
  • the surface rust prevention treatment is preferably applied to the entire outer peripheral surface and both end faces of the tube portion, and protects the tube portion by forming a film on the surface of the tube portion.
  • the portion for fixing the power line to the terminal box is made of metal and the strength is improved. Further, since the abutting surfaces that cause corrosion are reduced and drainage is easily performed from the abutting surfaces, corrosion of the flange portion of the power line fixing member can be prevented. Furthermore, a power line fixing member for connecting and fixing the power line to the in-wheel motor drive device can be electrically connected to the terminal box to obtain an earth function. According to the present invention, since the countermeasure against corrosion of the power line fixing member and the earth function are compatible, the life of the structure for connecting and fixing the power line to the in-wheel motor drive device is extended.
  • FIG. 1 It is an expanded sectional view showing an in-wheel motor drive. It is typical sectional drawing which shows the inside of an in-wheel motor drive device. It is sectional drawing which shows the connection structure of the in-wheel motor drive device and power line which become 1st Embodiment of this invention. It is a front view which shows the butt
  • FIG. 1 is a developed cross-sectional view showing an in-wheel motor drive device.
  • FIG. 2 is a schematic cross-sectional view showing the inside of the in-wheel motor drive device.
  • the in-wheel motor drive device 10 includes a wheel hub bearing portion 11 provided at the center of a wheel, a motor portion 21 that drives the wheel, and a wheel hub bearing portion that decelerates the rotation of the motor portion 21. 11 and the speed reduction part 31 which transmits to 11 is provided.
  • the motor unit 21 and the speed reduction unit 31 are arranged offset from the axis O of the wheel hub bearing unit 11.
  • the axis O extends in the vehicle width direction and coincides with the axle.
  • the wheel hub bearing portion 11 is disposed on one side (outboard side) in the axial direction of the in-wheel motor driving device 10, and the motor portion 21 is on the other side (inboard side) in the axial direction of the in-wheel motor driving device 10.
  • the speed reduction part 31 is arranged in one axial direction than the motor part 21, and the axial direction position of the speed reduction part 31 overlaps the axial direction position of the wheel hub bearing part 11.
  • the wheel is a wheel with a tire (not shown) mounted on the outer periphery of the wheel W shown in FIG.
  • the in-wheel motor drive device 10 is disposed in the inner space of the wheel wheel W.
  • the wheel hub bearing portion 11 and the speed reduction portion 31 are accommodated in the inner space region of the wheel wheel W.
  • the motor unit 21 protrudes from the inner space region of the wheel wheel W to the other in the axial direction (inboard side), the motor unit 21 may be accommodated in the inner space region of the wheel wheel W as a modification (not shown).
  • the wheel hub bearing portion 11 is a rotating inner ring / fixed outer ring, and includes an inner ring 12 as a rotating wheel (hub wheel) coupled to the wheel wheel W, and an outer ring as a fixed ring disposed coaxially on the outer diameter side of the inner ring 12. 13 and a plurality of rolling elements 14 arranged in an annular space between the inner ring 12 and the outer ring 13.
  • a carrier member 17 is attached and fixed to the outer ring 13 by a connecting means such as a bolt 19.
  • the carrier member 17 is attached and fixed to the front portion 39f of the main body casing 39 of the speed reduction portion 31 by a coupling means such as a bolt 20 or the like.
  • the front portion 39 f is a casing wall portion that covers one end of the speed reduction portion 31 in the axis O direction of the main body casing 39.
  • the motor unit 21 has a motor rotating shaft 22, a rotor 23, a stator 24, and a motor casing 29, and is sequentially arranged from the axis M of the motor unit 21 to the outer diameter side in this order.
  • the motor unit 21 is an inner rotor / outer stator type radial gap motor, but may be another type of electric motor.
  • the motor unit 21 may be an axial gap motor.
  • the motor casing 29 surrounds the outer periphery of the stator 24. One end of the motor casing 29 in the direction of the axis M is coupled to a back surface portion 39b of the main body casing 39 of the speed reduction portion 31.
  • the other end of the motor casing 29 in the axis M direction is sealed with a plate-like motor casing cover 29v.
  • the back surface portion 39 b is a casing wall portion that covers the other end of the main body casing 39 in the direction of the axis O of the speed reduction portion 31.
  • the main body casing 39, the motor casing 29, and the motor casing cover 29v constitute a casing that forms the outline of the in-wheel motor drive device 10, and are also simply referred to as a casing.
  • This casing is made of aluminum or an aluminum alloy.
  • Both end portions of the motor rotating shaft 22 are rotatably supported by the back surface portion 39b of the main body casing 39 and the motor casing cover 29v of the motor portion 21 via rolling bearings 27 and 28, respectively.
  • the axis M that is the rotation center of the motor rotation shaft 22 and the rotor 23 extends in parallel with the axis O of the wheel hub bearing portion 11. That is, the motor unit 21 is disposed offset from the axis O of the wheel hub bearing unit 11.
  • the axis M of the motor unit is offset from the axis O in the vehicle front-rear direction, and specifically, is positioned in front of the vehicle with respect to the axis O.
  • the speed reduction unit 31 includes an input shaft 32 that is coaxially coupled to the motor rotation shaft 22 of the motor unit 21, an input gear 33 that is provided coaxially on the outer peripheral surface of the input shaft 32, and a plurality of intermediate gears 34. , 36, an intermediate shaft 35 coupled to the center of these intermediate gears 34, 36, an output shaft 38 connected to the inner ring 12 of the wheel hub bearing portion 11, and an output gear provided coaxially on the outer peripheral surface of the output shaft 38 37 and a main body casing 39 for accommodating the plurality of gears and the rotating shaft.
  • the main body casing 39 is also referred to as a speed reduction part casing because it forms an outline of the speed reduction part 31.
  • the input gear 33 is a helical gear with external teeth.
  • the input shaft 32 has a hollow structure, and one end 22e in the axial direction of the motor rotating shaft 22 is inserted into the hollow hole 32h of the input shaft 32, and is spline-fitted (including serrations, the same applies hereinafter) so as not to be relatively rotatable.
  • the input shaft 32 is rotatably supported by the front portion 39f and the back portion 39b of the main body casing 39 via the rolling bearings 32a and 32b on both ends of the input gear 33, respectively.
  • the axis N that is the center of rotation of the intermediate shaft 35 of the speed reduction part 31 extends parallel to the axis O. Both ends of the intermediate shaft 35 are rotatably supported by the front portion 39f and the back portion 39b of the main body casing 39 via rolling bearings 35a and 35b.
  • a first intermediate gear 34 is coaxially provided at the other end portion of the intermediate shaft 35 in the axis N direction.
  • a second intermediate gear 36 is provided coaxially in the central region in the axis N direction of the intermediate shaft 35.
  • the first intermediate gear 34 and the second intermediate gear 36 are external helical gears, and the diameter of the first intermediate gear 34 is larger than the diameter of the second intermediate gear 36.
  • the large-diameter first intermediate gear 34 is disposed on the other side in the axis N direction with respect to the second intermediate gear 36, and meshes with the small-diameter input gear 33.
  • the small-diameter second intermediate gear 36 is disposed on one side in the axis N direction relative to the first intermediate gear 34 and meshes with the large-diameter output gear 37.
  • the axis N of the intermediate shaft 35 is disposed above the axis O and the axis M as shown in FIG.
  • the axis N of the intermediate shaft 35 is arranged in front of the vehicle with respect to the axis O and behind the vehicle with respect to the axis M.
  • the speed reduction unit 31 is a three-axis parallel shaft gear reducer having axes O, N, and M that are arranged at intervals in the vehicle longitudinal direction and extend parallel to each other, and is decelerated in two stages.
  • the speed reduction unit 31 may be a multistage parallel shaft gear reducer having a plurality of intermediate shafts.
  • the output gear 37 is a helical gear with external teeth, and is provided coaxially at the center of the axis O of the output shaft 38.
  • the output shaft 38 extends along the axis O.
  • One end of the output shaft 38 in the direction of the axis O is inserted into the center hole of the inner ring 12 and is fitted so as not to be relatively rotatable.
  • the central portion in the axis O direction of the output shaft 38 is rotatably supported by the front portion 39f of the main body casing 39 via the rolling bearing 38a on the outer diameter side with respect to the other end portion in the axis O direction of the inner ring 12.
  • the other end portion of the output shaft 38 in the direction of the axis O is rotatably supported by the back surface portion 39b of the main body casing 39 via the rolling bearing 38b.
  • the speed reduction unit 31 is meshed between a small-diameter drive gear and a large-diameter driven gear, that is, meshed between the input gear 33 and the first intermediate gear 34, and meshed between the second intermediate gear 36 and the output gear 37.
  • the rotation of the input shaft 32 is decelerated and transmitted to the output shaft 38.
  • the rotating elements from the input shaft 32 to the output shaft 38 of the speed reduction portion 31 constitute a drive transmission path for transmitting the rotation of the motor portion 21 to the inner ring 12 of the wheel hub bearing portion 11.
  • the main body casing 39 includes a cylindrical part in addition to the front part 39f and the back part 39b described so far.
  • the cylindrical portion covers the internal parts of the speed reducing portion 31 so as to surround the axes O, N, and M extending in parallel with each other.
  • the plate-like front portion 39f covers the internal part of the speed reducing portion 31 from one side in the axial direction, and is coupled to one end of the cylindrical portion.
  • the plate-like back surface portion 39b covers the internal parts of the speed reducing portion 31 from the other side in the axial direction and is coupled to the other end of the cylindrical portion.
  • the back surface portion 39 b of the main body casing 39 is a partition wall that is coupled to the motor casing 29 and partitions the internal space of the speed reduction portion 31 and the internal space of the motor portion 21.
  • the motor casing 29 is supported by the main body casing 39 and protrudes from the main body casing 39 to the other side in the axial direction.
  • the main casing 39 defines an internal space of the speed reduction unit 31 and accommodates all the rotating elements (rotating shafts and gears) of the speed reduction unit 31 in the internal space.
  • the lower part of the main body casing 39 is an oil storage part 39t.
  • the height position of the oil storage part 39t overlaps the height position of the lower part of the motor part 21.
  • Lubricating oil that lubricates the motor unit 21 and the speed reduction unit 31 is stored in the oil storage unit 39 t that occupies the lower part of the internal space of the main body casing 39.
  • the input shaft 32, the intermediate shaft 35, and the output shaft 38 are supported at both ends by the above-described rolling bearings.
  • These rolling bearings 32a, 35a, 38a, 32b, 35b, and 38b are radial bearings.
  • the rotor 23 of the motor unit 21 rotates and outputs rotation from the motor rotation shaft 22 to the speed reduction unit 31.
  • the deceleration unit 31 decelerates the rotation input from the motor unit 21 to the input shaft 32 and outputs the rotation from the output shaft 38 to the wheel hub bearing unit 11.
  • the inner ring 12 of the wheel hub bearing portion 11 rotates at the same rotational speed as the output shaft 38 and drives a wheel wheel W that is attached and fixed to the inner ring 12.
  • FIG. 3 is a cross-sectional view showing a connection structure between the in-wheel motor driving device and the power line according to the first embodiment of the present invention.
  • a terminal box 25 for drawing in three power lines 41 extending from an inverter (not shown) installed outside the in-wheel motor drive device 10 is provided on the outer periphery of the motor unit 21.
  • the power line 41 supplies power to the in-wheel motor drive device 10, particularly the motor unit 21. Since all the three power lines 41 have the same structure, the following description will be made on behalf of one power line 41.
  • the terminal box 25 is provided on the upper part of the motor unit 21 and is adjacent to the motor casing 29.
  • the motor casing 29 partitions the internal space L of the motor unit 21 that houses the rotor 23 (FIG. 1) and the stator 24 (FIG. 1) from the internal space M of the terminal box 25.
  • the motor casing 29 also serves as the bottom wall of the terminal box 25 and defines the bottom of the terminal box 25.
  • the terminal box 25 is divided into four sides by a side wall 51 erected on the outer peripheral surface of the motor casing 29.
  • the side wall 51 has, for example, a rectangular frame shape and is integrally formed with the motor casing 29.
  • the material of the side wall 51 is the same as the material of the motor casing 29, for example, an aluminum alloy.
  • the top wall 52 is detachably fixed to the upper edge of the side wall 51.
  • the top wall 52 is, for example, a square plate and is a lid that defines the top of the terminal box 25.
  • the internal space M of the terminal box 25 is blocked from the outside of the terminal box 25 by these walls, and rainwater and foreign matter do not enter from the outside.
  • the power line 41 is an insulated cable having a core wire 41c made of a conductive stranded wire and a covering layer 41d such as vinyl covering the core wire 41c. At the end of the power line 41, the coating layer 41d is peeled off, and the core line 41c is exposed. A metal terminal 42 is crimped to the tip of the core wire 41c.
  • a power line fixing member 43 is fixed to the outer peripheral surface of the end region of the power line 41 where the coating layer 41d remains.
  • the power line fixing member 43 has a cylindrical portion 44 and a flange portion 45.
  • the inner diameter of the cylindrical portion 44 is substantially equal to the outer diameter of the power line 41 and is fitted to the outer peripheral surface of the power line 41 without a gap over the entire circumference.
  • the flange portion 45 is a flat plate erected on the outer peripheral surface slightly closer to the rear end than the front end of the cylindrical portion 44.
  • the flange portion 45 is integrally formed with the cylindrical portion 44 and is made of the same material as the cylindrical portion 44.
  • the power line fixing member 43 is made of metal, specifically, an aluminum alloy. In this case, the power line fixing member 43 can be made of the same material as the motor casing 29 and the side wall 51 of the terminal box 25.
  • the power line fixing member 43 may be another metal, for example, stainless steel (18Cr-8Ni stainless steel).
  • stainless steel has a high strength and is resistant to corrosion, and therefore can hold the power line 41 for a long period of time. Further, since the power line fixing member 43 made of stainless steel has a high resistance to external force, it is not easily deformed, broken or separated even when the power line 41 is pulled.
  • the cylinder portion 44 of the power line fixing member 43 may be subjected to surface rust prevention treatment.
  • the surface rust prevention treatment is, for example, a zinc plating treatment, a chrome plating treatment, a nickel plating treatment, or a surface treatment by Geomet (registered trademark), and the tubular portion 44 is protected by forming a film on the surface of the tubular portion 44.
  • it may be a surface treatment in which a thin film made of resin is formed on the surface of the cylindrical portion 44.
  • the flange portion 45 is not subjected to surface rust prevention treatment. This is because the end face of the flange portion 45 is electrically connected to the surface of the terminal box 25.
  • a through hole 51 h is formed in the side wall 51 of the terminal box 25.
  • the surface of the side wall 51 in which the through hole 51h is formed is directed inward in the vehicle width direction (inboard side), like the disc-shaped motor casing cover 29v.
  • One end of the power line fixing member 43 is inserted into the through hole 51h.
  • one end of the power line 41 is drawn into the internal space M of the terminal box 25.
  • the metal terminal 42 is crimped to the tip of the power line 41 drawn into the internal space M.
  • the metal terminal 42 has a tip 42b made of a metal plate.
  • a through hole 42h is formed in the tip portion 42b.
  • Bolts 46 are passed through the through holes 42h.
  • the shaft portion of the bolt 46 is screwed into a screw hole 26 t formed at one end of the conductive rod 26.
  • the metal terminal 42 is connected and fixed to one end of the conductive rod 26 in the internal space M.
  • the conductive rod 26 extends through the wall of the motor casing 29.
  • the outer periphery of the conductive rod 26 is covered with an annular insulating material 30. As a result, the conductive rod 26 is electrically insulated from the motor casing 29.
  • One end of the conductive rod 26 is disposed in the internal space M of the terminal box 25, and the other end is disposed in the internal space L of the motor casing 29.
  • the other end is an internal space L and is connected to a coil (not shown) wound around the stator 24 (FIG. 1).
  • annular groove extending around the outer peripheral surface of the cylindrical portion 44 and an O-ring 48 fitted to the annular groove are provided.
  • the O-ring 48 is a sealing material and seals an annular gap between the inner peripheral surface of the through hole 51 h and the outer peripheral surface of the cylindrical portion 44.
  • the flange portion 45 formed on one end side of the cylindrical portion 44 is abutted against the side wall 51 of the terminal box 25.
  • the flange portion 45 is not an annular ring having a constant outer diameter, but is formed so that a part of the circumferential position protrudes more to the outer diameter side than the other circumferential position (the tongue of FIG. 4). Part 45z).
  • the tongue portion 45z of the flange portion 45 is formed with a through hole extending from one end surface to the other end surface.
  • the shaft portion 47b of the bolt 47 shown in FIG. 3 is inserted through the through hole.
  • the bolt 47 and the screw hole 51 t formed in the side wall 51 are fixing means for fixing a part of the flange portion 45 to the terminal box 25.
  • the screw hole 51t extends in parallel with the through hole 51h.
  • the shaft portion 47b of the bolt 47 is screwed into the screw hole 51t, and the head portion 47c of the bolt 47 is tightened to press the flange portion 45 against the surface of the side wall 51, thereby fixing the connection of the power line 41 to the terminal box 25.
  • the end surface of the flange portion 45 is abutted against the surface of the terminal box 25 by such fixing means.
  • FIG. 4 is a front view showing the surface of the side wall 51, and shows a state seen in the penetration direction of the through hole 51h.
  • the cylindrical portion 44 and the flange portion 45 are represented by phantom lines in FIG.
  • the surface 51i of the side wall 51 is a flat surface.
  • the side wall 51 is formed with a lightening portion 51c leaving a power line side region 51j surrounding the through hole 51h and a fixed side region 51k surrounding the screw hole 51t in the surface 51i.
  • the lightening portion 51c is a recess that is recessed from the surface 51i, the power line side region 51j, and the fixed side region 51k.
  • the power line side region 51j and the fixed side region 51k are flush with each other. In FIG. 4, the power line side region 51j and the fixed side region 51k are hatched.
  • the shape of the thinned portion 51 c is made slightly larger than the flange portion 45 and covers the outer peripheral edge of the flange portion 45. For this reason, the end surface of the flange part 45 does not contact the surface 51i.
  • the lightening portion 51c includes a boundary portion 51d, a power line side portion 51e, and a fixed side portion 51f.
  • the boundary portion 51d is a boundary that separates the power line side region 51j and the fixed side region 51k that are formed flush with each other.
  • the power line side portion 51e is adjacent to the boundary portion 51d and surrounds the power line side region 51j.
  • the fixed side portion 51f is adjacent to the boundary portion 51d and surrounds the fixed side region 51k.
  • the end face of the flange portion 45 is abutted against the power line side region 51j and the fixed side region 51k.
  • the end face of the flange portion 45 is close to the screw hole 51t and far from the cylindrical portion 44 (same as the fixed side region 51k) and far from the screw hole 51t.
  • a power line side region (same as the power line side region 51j) that surrounds the cylindrical portion 44 near the cylindrical portion 44 and a boundary region that divides the fixed side region and the power line side region are included.
  • the boundary region of the end surface of the flange portion 45 is separated from the bottom surface of the boundary portion 51d by overlapping with the boundary portion 51d of the thinned portion 51c.
  • the entire end surface of the flange portion 45 does not abut against the surface of the side wall 51, but a part of the end surface of the flange portion 45 is separated from the surface of the side wall 51 by the thinned portion 51c.
  • the power line side region on the end face of the flange 45 is abutted against the power line side region 51j on the surface of the side wall 51.
  • the fixed side region of the end face of the flange portion 45 is abutted against the fixed side region 51k of the side wall 51 surface.
  • region of the flange part 45 end surface is spaced apart from the bottom face of the boundary part 51d, as shown in FIG. Thereby, the power line side region 51j of the butted surface and the fixed side region 51k of the butted surface are divided.
  • the thinned portion 51c that overlaps the flange portion 45 is provided on the surface of the side wall 51, the abutting surface between the flange portion 45 and the side wall 51 is reduced. Therefore, the possibility that rainwater enters the abutting surface can be reduced. Even if rainwater enters the abutting surface, the rainwater is discharged to the meat removal portion 51c. By such an action, corrosion of the connection fixing portion between the power line fixing member 43 and the terminal box 25 can be prevented.
  • the power line fixing member 43 is made of metal, its strength is higher than that of resin. Thereby, durability of the connection location of the power line 43 and the terminal box 25 improves. Since the power line fixing member 43 is provided on the power line 41 that supplies a large current, there is a risk of charging. Since the flange portion 45 of the power line fixing member 43 of the present embodiment contacts the side wall 51 of the terminal box 25 in the power line side region 51j and the fixed side region 51k, the grounding function of the power line fixing member 43 can be ensured. it can. Therefore, charging of the power line fixing member 43 can be prevented.
  • a seal layer is formed between the power line side region on the end face of the flange portion 45 and the power line side region 51j on the surface of the side wall 51.
  • the seal layer is obtained by applying a liquid gasket to the power line side region 51j and curing the liquid gasket after the connection is fixed.
  • This flange seals the flange 45 and the side wall 51 tightly in the annular power line side region 51j. Therefore, corrosion of the power line side region 51j due to rain water or the like can be reliably prevented.
  • the flange portion 45 and the side wall 51 are brought into close contact with each other by the tightening force of the bolt 47, so that the seal layer can be omitted.
  • the power line fixing member 43 in the operation of connecting the power line fixing member 43 to the terminal box 25, the excess liquid gasket flows into the lightening portion 51c and does not adhere to the fixed side region 51k. Therefore, the power line fixing member 43 can be in direct contact with the side wall 51 in the fixed side region 51k, and the ground function of the power line fixing member 43 can be obtained.
  • the surface of the bolt 47 may be subjected to a treatment for improving the rust prevention effect. Thereby, corrosion of the bolt 47 can be suppressed. Moreover, since the surface of the flange portion 45 is connected to the surface of the terminal box 25 at the fixed side region 51k, the grounding function of the flange portion 45 is not impaired.
  • the surface rust prevention treatment applied to the bolt 47 is, for example, zinc plating treatment, chrome plating treatment, nickel plating treatment, or surface treatment by Geomet (registered trademark). By such surface treatment, a film is formed on the surface of the bolt 47 to protect the bolt 47.
  • the side wall 51 of the terminal box 25 of the present embodiment is made of an aluminum alloy
  • the power line fixing member 43 is also made of an aluminum alloy.
  • the surface of the cylindrical portion 44 of the power line fixing member 43 is subjected to galvanizing treatment, chrome plating treatment, or nickel plating treatment.
  • FIG. 5 is a front view showing a modified example of the present invention, and shows a state seen in the penetration direction of the through hole 51 h formed in the side wall 51.
  • FIG. 5 about the modification of FIG. 5, about the structure which is common in embodiment mentioned above, the same code
  • a boundary portion 51 d that is thinned into a groove shape is formed on the surface of the side wall 51 in place of the frame-shaped thinned portion 51 c (FIG. 4).
  • the groove-shaped boundary portion 51d extends across the flange portion 45, and divides the power line side region 51j and the fixed side region 51k.
  • the end face of the flange portion 45 is separated from the surface of the terminal box 25 by the boundary portion 51d. Therefore, the abutting surfaces of the flange portion 45 and the terminal box 25 are reduced, and the possibility that rainwater enters the abutting surface can be reduced. Should rainwater or the like enter the abutting surface, such rainwater can be quickly discharged to the boundary portion 51d. This action can prevent corrosion at the connecting and fixing portion between the power line fixing member 43 and the terminal box 25.
  • the flange portion 45 and the side wall 51 are in contact with each other in the fixed region 51 k, and the ground function of the power line fixing member 43 can be obtained. Further, by providing a seal layer in the power line side region 51j, it is possible to prevent rainwater or the like from entering and prevent the power line side region 51j from corroding.
  • a seal layer may be provided in the fixed side region 51k instead of the power line side region 51j. Even in such a case, the flange 45 and the side wall 51 are in direct contact with each other in the power line side region 51j, and the ground function of the power line fixing member 43 can be obtained.
  • FIG. 6 is a front view showing another modified example of the present invention, and shows a state viewed in the penetrating direction of the through hole 51 h formed in the side wall 51.
  • the same reference numerals are assigned to configurations common to the above-described embodiment, description thereof is omitted, and different configurations are described below.
  • the tongues 45z and 45z are formed by projecting to one and the other of the reference lines P (in the outer diameter direction of the cylinder part 44). For this reason, as shown in FIG. 6, two locations in the circumferential direction of the flange portion 45 protrude greatly from the cylindrical portion 44 toward the outer diameter side to form a tongue portion 45z.
  • Each tongue 45z is formed with a through hole through which a bolt as a fixing means is inserted.
  • Screw holes 51t and 51t are formed at two locations on the surface of the side wall 51 corresponding to each through hole. The screw holes 51t and 51t are arranged at an interval of 180 ° in the circumferential direction when viewed from the through hole 51h.
  • Each screw hole 51t is surrounded by a fixed-side region 51k.
  • Each tongue portion 45z of the flange portion 45 is connected to the surface of the terminal box 25 at these two fixed-side regions 51k.
  • a plurality of groove-like boundary portions 51d and 51d are provided on the surface of the side wall 51.
  • two boundary portions 51d are provided as the lightening portions. These boundary portions 51d are arranged so as to extend in parallel with each other across the through hole 51h, and divide one power line side region 51j and two fixed side regions 51k.
  • the end face of the flange portion 45 is separated from the surface of the terminal box 25 by the two groove-like boundary portions 51d and 51d. Therefore, the abutting surface between the end face of the flange portion 45 and the surface of the terminal box 25 is reduced, and the possibility that rainwater enters the abutting surface can be reduced. Should rainwater or the like enter the abutting surface, such rainwater can be quickly discharged to the boundary portion 51d. This action can prevent corrosion at the connecting and fixing portion between the power line fixing member 43 and the terminal box 25.
  • a seal layer in which the liquid gasket is cured or an electrically insulating seal layer made of a rubber sheet may be provided.
  • the flange portion 45 may be brought into contact with the surface of the terminal box 25 in the power line side region 51j and the fixed side region 51k without providing a seal layer. Thereby, the grounding function of the power line fixing member 43 can be obtained.
  • FIG. 7 is a front view showing still another modified example of the present invention, and shows a state viewed in the penetration direction of the through hole 51 h formed in the side wall 51.
  • the same components as those in the above-described embodiment are denoted by the same reference numerals, description thereof will be omitted, and different configurations will be described below.
  • the power line fixing member 43 includes a plurality of cylindrical portions 44 that are inserted through the through holes 51 h and a single large flange portion 45 that couples the cylindrical portions 44.
  • the three cylindrical portions 44 are aligned and extend in parallel with each other.
  • the flange portion 45 includes two tongue portions 45 z that are fewer than the cylindrical portion 44. Each tongue 45z protrudes in a direction orthogonal to the alignment direction of the cylindrical portion 44.
  • the one tongue portion 45z is formed so as to protrude from the one cylindrical portion 44 in the alignment direction to the outer diameter side.
  • the other tongue portion 45z is formed so as to protrude from the other cylindrical portion 44 in the alignment direction to the outer diameter side.
  • Each tongue 45z is abutted against a fixed region 51k surrounding each screw hole 51t.
  • two screw holes 51t are provided.
  • the arrangement of the three through holes 51h and the two screw holes 51t corresponds to the arrangement of the three cylindrical portions 44 and the two tongue portions 45z, respectively.
  • the 7 includes a boundary portion 51d, a power line side portion 51e, and a fixed side portion 51f.
  • the boundary portion 51d is a boundary that separates the power line side region 51j and the fixed side region 51k that are formed flush with each other.
  • the power line side portion 51e is adjacent to the boundary portion 51d and surrounds the continuous power line side region 51j.
  • the fixed-side portion 51f is adjacent to the boundary portion 51d and surrounds each fixed-side region 51k.
  • the end surface of the flange portion 45 is separated from the surface of the terminal box 25 by the thinned portion 51c. Therefore, the abutting surface between the end face of the flange portion 45 and the surface of the terminal box 25 is reduced, and the possibility that rainwater enters the abutting surface can be reduced. Even if rainwater or the like enters the abutting surface, such rainwater can be quickly discharged to the meat removal portion 51c. This action can prevent corrosion at the connecting and fixing portion between the power line fixing member 43 and the terminal box 25.
  • the flange portion 45 comes into contact with the surface of the terminal box 25 in at least one place of the power line side region 51j and the fixed side region 51k.
  • the ground function of the power line fixing member 43 can be obtained.
  • the present invention is advantageously used in electric vehicles and hybrid vehicles.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Motor Or Generator Frames (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

This connection structure for an in-wheel motor drive device and a power line is provided with: a terminal box having a metal side wall (51); a power line having an end section inserted into the terminal box; a metal power line fixing member having a cylindrical part (44) fitted to the outer peripheral surface of the power line and a flange part (45) provided to the cylindrical part; and a fixing means (51t) that fixes a portion of the flange part to the terminal box. In addition, an end surface of the flange part (45) includes: a fixed-side region (51k) which is near to the fixing means and far from the cylindrical part; a power line-side region (51j) which surrounds the cylindrical part to be far from the fixing means and near to the cylindrical part; and a boundary region (51d) which divides the fixed-side region and the power line-side region, wherein the fixed-side region (51k) and the power line-side region (51j) is adjacent to the terminal box surface and the boundary region (51d) is spaced apart from the terminal box surface.

Description

インホイールモータ駆動装置と動力線の接続構造In-wheel motor drive unit and power line connection structure
　本発明は、車輪を駆動するインホイールモータ駆動装置に関し、特にインホイールモータ駆動装置に動力線を接続して固定する構造に関する。 The present invention relates to an in-wheel motor drive device for driving wheels, and more particularly to a structure for connecting and fixing a power line to the in-wheel motor drive device.
　インホイールモータと動力線（給電ケーブル、電線ともいう）との接続構造として例えば特開２０１１－０００９６１号公報（特許文献１）に記載のものが知られている。特許文献１に記載された技術は、インホイールモータ駆動装置のケーシングに端子ボックスを付設し、端子ボックスに３本の給電ケーブルをつなぎ込むものである。各給電ケーブル線の端末部外周面は樹脂成形体で覆われる。樹脂成形体にはブラケットが設けられる。ブラケットは金属製の板材であり、固定孔が穿設される。これらの固定孔に位置に相当するインホイールモータ端子箱の上面にはそれぞれ、雌ねじ孔が穿設される。そしてボルトがブラケットの固定孔を貫通し、端子箱の雌ねじ孔に螺合する。特許文献１には、ブラケットが電気的なアース材と構造的な固定材を兼ねていると記載されている。 As a connection structure between an in-wheel motor and a power line (also referred to as a power feeding cable or an electric wire), for example, a structure described in Japanese Patent Application Laid-Open No. 2011-000961 (Patent Document 1) is known. In the technique described in Patent Document 1, a terminal box is attached to a casing of an in-wheel motor drive device, and three power supply cables are connected to the terminal box. The outer peripheral surface of the terminal portion of each power supply cable line is covered with a resin molded body. A bracket is provided on the resin molded body. The bracket is a metal plate and has a fixing hole. Female screw holes are formed in the upper surfaces of the in-wheel motor terminal boxes corresponding to the positions of these fixing holes. Then, the bolt passes through the fixing hole of the bracket and is screwed into the female screw hole of the terminal box. Patent Document 1 describes that the bracket serves as both an electrical grounding material and a structural fixing material.
特開２０１１－０００９６１号公報JP2011-000961A
　特許文献１の樹脂成形体は樹脂製であることから、耐久性および強度不足が懸念される。そこでインホイールモータに接続される動力線の端部外周面に金属製の動力線固定部材を嵌合し、この動力線固定部材をインホイールモータの金属製のケーシングに固定することが強度確保および耐久性の観点から好ましい。また金属製の動力線固定部材を金属線のケーシングに接続すれば、動力線固定部材はアースとして機能するため、動力線固定部材の帯電を防止される。 Since the resin molded body of Patent Document 1 is made of resin, there is a concern about durability and insufficient strength. Therefore, it is possible to secure the strength by fitting a metal power line fixing member to the outer peripheral surface of the end of the power line connected to the in-wheel motor and fixing the power line fixing member to the metal casing of the in-wheel motor. It is preferable from the viewpoint of durability. If the metal power line fixing member is connected to the casing of the metal wire, the power line fixing member functions as a ground, so that charging of the power line fixing member is prevented.
　一方で樹脂製ではなく金属製の動力線固定部材には、腐食対策が必要である。インホイールモータは路面に近く、外気にさらされるため、雨水や塩害を受けるためである。例えば特許文献１のブラケットは金属製の板材であって端子箱の表面に面接触する。かかる板材の表面は原則としてボルトの締め付け力によって端子箱の表面に密着するものの、ボルトの締め付け力が及ばない表面には雨水や塩水が侵入して徐々に腐食する虞がある。 On the other hand, it is necessary to take corrosion countermeasures for metal power line fixing members instead of resin. This is because the in-wheel motor is close to the road surface and exposed to the outside air, so it is subject to rainwater and salt damage. For example, the bracket of Patent Document 1 is a metal plate and is in surface contact with the surface of the terminal box. Although the surface of such a plate material is in close contact with the surface of the terminal box in principle by the tightening force of the bolt, there is a risk that rainwater or salt water will invade the surface where the tightening force of the bolt does not reach and gradually corrode.
　腐食対策として例えば、特許文献１の金属製ブラケットおよびボルトや、上述した金属製の動力線固定部材に対し、防錆効果の高いメッキ処理、例えばジオメット（登録商標）に係るメッキ処理を施して部材表面に皮膜を形成することや、樹脂製の薄膜で覆う表面処理を施すことが考えられる。かかる腐食対策は通電性を保証するものではない。そうすると金属製ブラケットおよび金属製の動力線固定部材がアースとして機能しなくなるという問題がある。 As a countermeasure against corrosion, for example, the metal bracket and bolt of Patent Document 1 and the metal power line fixing member described above are subjected to a plating process having a high rust prevention effect, for example, a plating process related to Geomet (registered trademark). It is conceivable to form a film on the surface or to apply a surface treatment to cover with a resinous thin film. Such corrosion countermeasures do not guarantee the conductivity. Then, there is a problem that the metal bracket and the metal power line fixing member do not function as a ground.
　本発明は、上述の実情に鑑み、動力線をインホイールモータ駆動装置に接続固定する構造において、強度および耐久性を確保し、さらにはアース機能と腐食対策を両立させる技術を提供することを目的とする。 In view of the above circumstances, the present invention aims to provide a technology that secures strength and durability in a structure in which a power line is connected and fixed to an in-wheel motor drive device, and further provides both a grounding function and a corrosion countermeasure. And
　この目的のため本発明によるインホイールモータ駆動装置と動力線の接続構造は、インホイールモータ駆動装置のケーシングに設けられた金属製の壁で区画される端子ボックスと、インホイールモータ駆動装置の外部から延びて端部が端子ボックスに差し込まれてインホイールモータ駆動装置に電力を供給する動力線と、動力線の外周面に嵌合する筒部および当該筒部に設けられるフランジ部を有する金属製の動力線固定部材と、フランジ部の一部分を端子ボックスに固定する固定手段と、を備える。そしてフランジ部の端面は、固定手段に近く筒部から遠い固定側領域と、反対に固定手段から遠く筒部に近く当該筒部を囲繞する動力線側領域と、固定側領域および動力線側領域を分断する境界領域を含み、固定側領域および動力線側領域は端子ボックスの金属製壁の表面に突き合わされ、境界領域は端子ボックスの金属製壁の表面から離隔される。 For this purpose, the in-wheel motor drive device and power line connection structure according to the present invention includes a terminal box defined by a metal wall provided in a casing of the in-wheel motor drive device, and an external portion of the in-wheel motor drive device. A power line that extends from the end and is inserted into the terminal box and supplies power to the in-wheel motor drive device, a cylindrical portion that fits to the outer peripheral surface of the power line, and a flange portion that is provided on the cylindrical portion And a fixing means for fixing a part of the flange portion to the terminal box. And the end face of the flange part is a fixed side area that is close to the fixing means and far from the cylindrical part, and conversely, a power line side area that is far from the fixing means and close to the cylindrical part, and surrounds the cylindrical part, and the fixed side area and the power line side area The fixed side region and the power line side region are abutted against the surface of the metal wall of the terminal box, and the boundary region is separated from the surface of the metal wall of the terminal box.
　かかる本発明によれば、動力線固定部材が金属製であることから、動力線固定部材の強度を大きくして耐久性が向上する。また、動力線固定部材のフランジ部の端面が全体的に端子ボックスの表面の突き合わされるのではなく、境界領域によって端子ボックスの表面から離隔される。したがって突き合わせ面を少なくして、雨水が突き合わせ面に進入する虞を少なくすることができる。また万一雨水等が突き合わせ面に進入しても、かかる雨水を境界領域へ排出させることができる。さらに動力線固定部材のフランジ部を動力線側領域および／または固定側領域で端子ボックスの表面に接続させて動力線固定部材のアース機能を得ることができ、動力線固定部材の帯電を防止できる。フランジ部表面の境界領域を端子ボックス表面から離隔させる構造として例えば、端子ボックスの壁のうち動力線固定部材のフランジ部と重なる箇所には肉抜き部を形成して表面を窪ませるとよい。肉抜き部の配置は少なくともフランジ部端面の境界部分に対応する。これによりフランジ部端面の境界領域は、端子ボックス表面から離隔される。インホイールモータ駆動装置のケーシングは金属製であり、端子ボックスの金属製壁と電気的に接続する。 According to the present invention, since the power line fixing member is made of metal, the strength of the power line fixing member is increased and the durability is improved. Further, the end face of the flange portion of the power line fixing member is not entirely brought into contact with the surface of the terminal box, but is separated from the surface of the terminal box by the boundary region. Therefore, it is possible to reduce the risk of rainwater entering the abutting surface by reducing the abutting surface. Even if rainwater or the like enters the abutting surface, such rainwater can be discharged to the boundary region. Furthermore, the grounding function of the power line fixing member can be obtained by connecting the flange portion of the power line fixing member to the surface of the terminal box in the power line side region and / or the fixed side region, and charging of the power line fixing member can be prevented. . As a structure for separating the boundary region on the surface of the flange portion from the surface of the terminal box, for example, a portion of the wall of the terminal box that overlaps with the flange portion of the power line fixing member may be formed with a hollow portion to make the surface concave. The arrangement of the lightening portion corresponds to at least the boundary portion of the end face of the flange portion. Thereby, the boundary region of the end face of the flange portion is separated from the surface of the terminal box. The casing of the in-wheel motor drive device is made of metal and is electrically connected to the metal wall of the terminal box.
　本発明の一局面として、互いに突き合わされるフランジ部端面の固定側領域と端子ボックスの表面の間には、シール材が介在するとよい。あるいは本発明の他の局面として、互いに突き合わされるフランジ部端面の動力線側領域と端子ボックスの表面の間には、シール材が介在するとよい。かかる局面によれば、動力線周辺の突き合わせ面のシール性が向上することから、雨水が動力線に向かって進入することを阻止できる。またシール材を介在させない他方の固定側領域で、フランジ部端面と端子ボックス表面を接続して、動力線固定部材のアース機能を得ることができる。 As one aspect of the present invention, a sealing material may be interposed between the fixed-side region of the end faces of the flange portions that face each other and the surface of the terminal box. Alternatively, as another aspect of the present invention, a sealing material may be interposed between the power line side regions of the end faces of the flange portions that are faced to each other and the surface of the terminal box. According to this aspect, since the sealing performance of the butt surface around the power line is improved, rainwater can be prevented from entering toward the power line. Further, the grounding function of the power line fixing member can be obtained by connecting the end face of the flange portion and the surface of the terminal box in the other fixed side region where no sealant is interposed.
　本発明の好ましい局面として、シール材は硬化した液状ガスケットである。かかる局面によれば、余分な液状ガスケットが境界領域に留まることから、固定側領域に未硬化の液状ガスケットが進入することがない。したがって固定側領域でフランジ部端面と端子ボックス表面を電気的に確実に接続することができる。他の局面として、シール材は弾性体からなるシート、例えばゴムシート、である。あるいは他の局面として、シール材は弾性体以外の樹脂シートである。 As a preferred aspect of the present invention, the sealing material is a hardened liquid gasket. According to this aspect, since the excess liquid gasket remains in the boundary region, the uncured liquid gasket does not enter the fixed side region. Therefore, the flange end face and the terminal box surface can be electrically and reliably connected in the fixed region. As another aspect, the sealing material is a sheet made of an elastic body, for example, a rubber sheet. Alternatively, as another aspect, the sealing material is a resin sheet other than the elastic body.
　動力線固定部材のフランジ部を端子ボックス表面に固定する手段は、特に限定されない。本発明のさらに好ましい局面として固定手段は、端子ボックスに形成されるねじ穴、フランジ部の一部分に形成される貫通孔、および該貫通孔に通されてねじ穴に螺合するボルトを有する。そしてボルトは表面防錆処理を施される。かかる局面によれば、ボルトの腐食を防止することができ固定手段の耐久寿命が長くなる。ボルトの表面防錆処理は、例えば亜鉛メッキ処理、クロムメッキ処理、ニッケルメッキ処理、あるいはジオメット（登録商標）による表面処理であり、ボルト表面に皮膜を形成してボルトを保護する。あるいはボルト表面に樹脂からなる薄膜を形成する表面処理である。他の局面として、固定手段のボルトは、表面防錆処理を施されない。 The means for fixing the flange portion of the power line fixing member to the surface of the terminal box is not particularly limited. As a further preferred aspect of the present invention, the fixing means includes a screw hole formed in the terminal box, a through hole formed in a part of the flange portion, and a bolt that is passed through the through hole and screwed into the screw hole. The bolt is then subjected to a surface rust prevention treatment. According to this aspect, corrosion of the bolt can be prevented and the durable life of the fixing means is increased. The bolt surface rust prevention treatment is, for example, zinc plating treatment, chrome plating treatment, nickel plating treatment, or surface treatment by Geomet (registered trademark), and a bolt is formed on the bolt surface to protect the bolt. Or it is surface treatment which forms the thin film which consists of resin on the volt | bolt surface. As another aspect, the bolt of the fixing means is not subjected to surface rust prevention treatment.
　強度向上および耐久性向上のため、端子ボックスはインホイールモータ駆動装置のケーシングに一体形成されることが好ましい。インホイールモータ駆動装置の軽量化のため、インホイールモータ駆動装置のケーシングおよび端子ボックスを区画する壁は軽金属製が好ましい。軽金属は、アルミニウムを主成分とする金属、例えばアルミニウム合金である。本発明の一局面として、端子ボックスの金属製壁と動力線固定部材は同じ材質である。かかる局面によれば、互いに接触する動力線固定部材と端子ボックスにイオン化傾向の差が無く、突き合わせ面の一方が他方よりも著しく腐食することを防止できる。かかる材質として例えば、アルミニウムを主成分とする金属（アルミニウム合金）が挙げられる。これによりインホイールモータ駆動装置の軽量化を図ることができ、コスト上有利である。 In order to improve strength and durability, the terminal box is preferably formed integrally with the casing of the in-wheel motor drive device. In order to reduce the weight of the in-wheel motor drive device, it is preferable that the walls defining the casing and the terminal box of the in-wheel motor drive device are made of light metal. The light metal is a metal mainly composed of aluminum, for example, an aluminum alloy. As one aspect of the present invention, the metal wall of the terminal box and the power line fixing member are made of the same material. According to this aspect, there is no difference in ionization tendency between the power line fixing member and the terminal box that are in contact with each other, and one of the butted surfaces can be prevented from being significantly corroded than the other. An example of such a material is a metal (aluminum alloy) containing aluminum as a main component. This can reduce the weight of the in-wheel motor drive device, which is advantageous in terms of cost.
　本発明の他の局面として、動力線固定部材の筒部は表面防錆処理を施される。かかる局面によれば、動力線固定部材の材質がイオン化傾向の高い金属製であっても、動力線固定部材の腐食を抑制できる。なお表面防錆処理は、筒部の外周面全体、および両端面に施されるとよく、筒部表面に皮膜を形成して筒部を保護する。 As another aspect of the present invention, the cylindrical portion of the power line fixing member is subjected to surface rust prevention treatment. According to this aspect, even if the material of the power line fixing member is a metal having a high ionization tendency, corrosion of the power line fixing member can be suppressed. The surface rust prevention treatment is preferably applied to the entire outer peripheral surface and both end faces of the tube portion, and protects the tube portion by forming a film on the surface of the tube portion.
　このように本発明によれば、動力線を端子ボックスに固定する箇所が金属製にされて強度が向上する。また腐食の原因になる突き合わせ面を少なくするとともに突き合わせ面から容易に排水されるので、動力線固定部材のフランジ部の腐食を防止することができる。さらに動力線をインホイールモータ駆動装置に接続固定する動力線固定部材を、端子ボックスに電気的に接続してアース機能を得ることができる。本発明によれば、動力線固定部材の腐食対策とアース機能が両立するので、動力線をインホイールモータ駆動装置に接続固定する構造の寿命が長くなる。 Thus, according to the present invention, the portion for fixing the power line to the terminal box is made of metal and the strength is improved. Further, since the abutting surfaces that cause corrosion are reduced and drainage is easily performed from the abutting surfaces, corrosion of the flange portion of the power line fixing member can be prevented. Furthermore, a power line fixing member for connecting and fixing the power line to the in-wheel motor drive device can be electrically connected to the terminal box to obtain an earth function. According to the present invention, since the countermeasure against corrosion of the power line fixing member and the earth function are compatible, the life of the structure for connecting and fixing the power line to the in-wheel motor drive device is extended.
インホイールモータ駆動装置を示す展開断面図である。It is an expanded sectional view showing an in-wheel motor drive. インホイールモータ駆動装置の内部を示す模式的な断面図である。It is typical sectional drawing which shows the inside of an in-wheel motor drive device. 本発明の第１実施形態になるインホイールモータ駆動装置と動力線の接続構造を示す断面図である。It is sectional drawing which shows the connection structure of the in-wheel motor drive device and power line which become 1st Embodiment of this invention. 同実施形態のフランジ部と端子ボックス表面の突き合わせ面を示す正面図である。It is a front view which shows the butt | matching surface of the flange part and terminal box surface of the embodiment. 同実施形態の変形例におけるフランジ部と端子ボックス表面の突き合わせ面を示す正面図である。It is a front view which shows the butt | matching surface of the flange part and terminal box surface in the modification of the embodiment. 同実施形態の他の変形例におけるフランジ部と端子ボックス表面の突き合わせ面を示す正面図である。It is a front view which shows the butt | matching surface of the flange part and terminal box surface in the other modification of the embodiment. 同実施形態のさらに他の変形例におけるフランジ部と端子ボックス表面の突き合わせ面を示す正面図である。It is a front view which shows the butt | matching surface of the flange part and terminal box surface in the further another modification of the embodiment.
　以下、本発明の実施の形態を、図面に基づき詳細に説明する。図１は、インホイールモータ駆動装置を示す展開断面図である。図２は、インホイールモータ駆動装置の内部を示す模式的な断面図である。図１に示すように、インホイールモータ駆動装置１０は、車輪の中心に設けられる車輪ハブ軸受部１１と、車輪を駆動するモータ部２１と、モータ部２１の回転を減速して車輪ハブ軸受部１１に伝達する減速部３１とを備える。モータ部２１および減速部３１は、車輪ハブ軸受部１１の軸線Ｏからオフセットして配置される。軸線Ｏは車幅方向に延び、車軸に一致する。軸線Ｏ方向位置に関し、車輪ハブ軸受部１１はインホイールモータ駆動装置１０の軸線方向一方（アウトボード側）に配置され、モータ部２１はインホイールモータ駆動装置１０の軸線方向他方（インボード側）に配置され、減速部３１はモータ部２１よりも軸線方向一方に配置され、減速部３１の軸線方向位置が車輪ハブ軸受部１１の軸線方向位置と重なる。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a developed cross-sectional view showing an in-wheel motor drive device. FIG. 2 is a schematic cross-sectional view showing the inside of the in-wheel motor drive device. As shown in FIG. 1, the in-wheel motor drive device 10 includes a wheel hub bearing portion 11 provided at the center of a wheel, a motor portion 21 that drives the wheel, and a wheel hub bearing portion that decelerates the rotation of the motor portion 21. 11 and the speed reduction part 31 which transmits to 11 is provided. The motor unit 21 and the speed reduction unit 31 are arranged offset from the axis O of the wheel hub bearing unit 11. The axis O extends in the vehicle width direction and coincides with the axle. Regarding the position in the axis O direction, the wheel hub bearing portion 11 is disposed on one side (outboard side) in the axial direction of the in-wheel motor driving device 10, and the motor portion 21 is on the other side (inboard side) in the axial direction of the in-wheel motor driving device 10. The speed reduction part 31 is arranged in one axial direction than the motor part 21, and the axial direction position of the speed reduction part 31 overlaps the axial direction position of the wheel hub bearing part 11.
　車輪は、図２に示す車輪ホイールＷの外周にタイヤ（図略）を装着したものである。インホイールモータ駆動装置１０は車輪ホイールＷの内空領域に配置される。車輪ハブ軸受部１１および減速部３１は車輪ホイールＷの内空領域に収容される。モータ部２１は車輪ホイールＷの内空領域から軸線方向他方（インボード側）に突出するが、図示しない変形例としてモータ部２１は車輪ホイールＷの内空領域に収容されてもよい。 The wheel is a wheel with a tire (not shown) mounted on the outer periphery of the wheel W shown in FIG. The in-wheel motor drive device 10 is disposed in the inner space of the wheel wheel W. The wheel hub bearing portion 11 and the speed reduction portion 31 are accommodated in the inner space region of the wheel wheel W. Although the motor unit 21 protrudes from the inner space region of the wheel wheel W to the other in the axial direction (inboard side), the motor unit 21 may be accommodated in the inner space region of the wheel wheel W as a modification (not shown).
　車輪ハブ軸受部１１は、回転内輪・固定外輪とされ、車輪ホイールＷと結合する回転輪（ハブ輪）としての内輪１２と、内輪１２の外径側に同軸に配置される固定輪としての外輪１３と、内輪１２と外輪１３との間の環状空間に配置される複数の転動体１４を有する。 The wheel hub bearing portion 11 is a rotating inner ring / fixed outer ring, and includes an inner ring 12 as a rotating wheel (hub wheel) coupled to the wheel wheel W, and an outer ring as a fixed ring disposed coaxially on the outer diameter side of the inner ring 12. 13 and a plurality of rolling elements 14 arranged in an annular space between the inner ring 12 and the outer ring 13.
　外輪１３にはボルト１９等の結合手段によってキャリア部材１７が取付固定される。またキャリア部材１７は、ボルト２０等の結合手段によって、減速部３１の本体ケーシング３９の正面部分３９ｆに取付固定される。正面部分３９ｆは、本体ケーシング３９のうち減速部３１の軸線Ｏ方向一方端を覆うケーシング壁部である。 A carrier member 17 is attached and fixed to the outer ring 13 by a connecting means such as a bolt 19. The carrier member 17 is attached and fixed to the front portion 39f of the main body casing 39 of the speed reduction portion 31 by a coupling means such as a bolt 20 or the like. The front portion 39 f is a casing wall portion that covers one end of the speed reduction portion 31 in the axis O direction of the main body casing 39.
　モータ部２１は、モータ回転軸２２、ロータ２３、ステータ２４、およびモータケーシング２９を有し、この順序でモータ部２１の軸線Ｍから外径側へ順次配置される。モータ部２１は、インナロータ、アウタステータ形式のラジアルギャップモータであるが、他の形式の電動モータであってもよい。例えば図示しなかったがモータ部２１はアキシャルギャップモータであってもよい。モータケーシング２９はステータ２４の外周を包囲する。モータケーシング２９の軸線Ｍ方向一方端は、減速部３１の本体ケーシング３９の背面部分３９ｂと結合する。モータケーシング２９の軸線Ｍ方向他方端は、板状のモータケーシングカバー２９ｖで封止される。背面部分３９ｂは、本体ケーシング３９のうち減速部３１の軸線Ｏ方向他方端を覆うケーシング壁部である。 The motor unit 21 has a motor rotating shaft 22, a rotor 23, a stator 24, and a motor casing 29, and is sequentially arranged from the axis M of the motor unit 21 to the outer diameter side in this order. The motor unit 21 is an inner rotor / outer stator type radial gap motor, but may be another type of electric motor. For example, although not shown, the motor unit 21 may be an axial gap motor. The motor casing 29 surrounds the outer periphery of the stator 24. One end of the motor casing 29 in the direction of the axis M is coupled to a back surface portion 39b of the main body casing 39 of the speed reduction portion 31. The other end of the motor casing 29 in the axis M direction is sealed with a plate-like motor casing cover 29v. The back surface portion 39 b is a casing wall portion that covers the other end of the main body casing 39 in the direction of the axis O of the speed reduction portion 31.
　本体ケーシング３９、モータケーシング２９、およびモータケーシングカバー２９ｖは、インホイールモータ駆動装置１０の外郭をなすケーシングを構成し、単にケーシングともいう。このケーシングはアルミニウム、あるいはアルミニウム合金製である。 The main body casing 39, the motor casing 29, and the motor casing cover 29v constitute a casing that forms the outline of the in-wheel motor drive device 10, and are also simply referred to as a casing. This casing is made of aluminum or an aluminum alloy.
　モータ回転軸２２の両端部は、転がり軸受２７，２８を介して、本体ケーシング３９の背面部分３９ｂと、モータ部２１のモータケーシングカバー２９ｖに回転自在にそれぞれ支持される。 Both end portions of the motor rotating shaft 22 are rotatably supported by the back surface portion 39b of the main body casing 39 and the motor casing cover 29v of the motor portion 21 via rolling bearings 27 and 28, respectively.
　モータ回転軸２２およびロータ２３の回転中心になる軸線Ｍは、車輪ハブ軸受部１１の軸線Ｏと平行に延びる。つまりモータ部２１は、車輪ハブ軸受部１１の軸線Ｏから離れるようオフセットして配置される。例えば図２に示すようにモータ部の軸線Ｍは、軸線Ｏから車両前後方向にオフセットして、具体的には軸線Ｏよりも車両前方、に配置される。 The axis M that is the rotation center of the motor rotation shaft 22 and the rotor 23 extends in parallel with the axis O of the wheel hub bearing portion 11. That is, the motor unit 21 is disposed offset from the axis O of the wheel hub bearing unit 11. For example, as shown in FIG. 2, the axis M of the motor unit is offset from the axis O in the vehicle front-rear direction, and specifically, is positioned in front of the vehicle with respect to the axis O.
　減速部３１は、図１に示すようにモータ部２１のモータ回転軸２２と同軸に結合する入力軸３２と、入力軸３２の外周面に同軸に設けられる入力歯車３３と、複数の中間歯車３４，３６と、これら中間歯車３４，３６の中心と結合する中間軸３５と、車輪ハブ軸受部１１の内輪１２に連結される出力軸３８と、出力軸３８の外周面に同軸に設けられる出力歯車３７と、これら複数の歯車および回転軸を収容する本体ケーシング３９を有する。本体ケーシング３９は減速部３１の外郭をなすことから減速部ケーシングともいう。 As shown in FIG. 1, the speed reduction unit 31 includes an input shaft 32 that is coaxially coupled to the motor rotation shaft 22 of the motor unit 21, an input gear 33 that is provided coaxially on the outer peripheral surface of the input shaft 32, and a plurality of intermediate gears 34. , 36, an intermediate shaft 35 coupled to the center of these intermediate gears 34, 36, an output shaft 38 connected to the inner ring 12 of the wheel hub bearing portion 11, and an output gear provided coaxially on the outer peripheral surface of the output shaft 38 37 and a main body casing 39 for accommodating the plurality of gears and the rotating shaft. The main body casing 39 is also referred to as a speed reduction part casing because it forms an outline of the speed reduction part 31.
　入力歯車３３は外歯のはすば歯車である。入力軸３２は中空構造であり、入力軸３２の中空孔３２ｈにモータ回転軸２２の軸線方向一方端部２２ｅが差し込まれて相対回転不可能にスプライン嵌合（セレーションも含む、以下同じ）する。入力軸３２は入力歯車３３の両端側で、転がり軸受３２ａ，３２ｂを介して、本体ケーシング３９の正面部分３９ｆおよび背面部分３９ｂに回転自在にそれぞれ支持される。 The input gear 33 is a helical gear with external teeth. The input shaft 32 has a hollow structure, and one end 22e in the axial direction of the motor rotating shaft 22 is inserted into the hollow hole 32h of the input shaft 32, and is spline-fitted (including serrations, the same applies hereinafter) so as not to be relatively rotatable. The input shaft 32 is rotatably supported by the front portion 39f and the back portion 39b of the main body casing 39 via the rolling bearings 32a and 32b on both ends of the input gear 33, respectively.
　減速部３１の中間軸３５の回転中心になる軸線Ｎは軸線Ｏと平行に延びる。中間軸３５の両端は、転がり軸受３５ａ，３５ｂを介して、本体ケーシング３９の正面部分３９ｆおよび背面部分３９ｂに回転自在に支持される。中間軸３５の軸線Ｎ方向他方端部には、第１中間歯車３４が同軸に設けられる。中間軸３５の軸線Ｎ方向中央領域には、第２中間歯車３６が同軸に設けられる。 The axis N that is the center of rotation of the intermediate shaft 35 of the speed reduction part 31 extends parallel to the axis O. Both ends of the intermediate shaft 35 are rotatably supported by the front portion 39f and the back portion 39b of the main body casing 39 via rolling bearings 35a and 35b. A first intermediate gear 34 is coaxially provided at the other end portion of the intermediate shaft 35 in the axis N direction. A second intermediate gear 36 is provided coaxially in the central region in the axis N direction of the intermediate shaft 35.
　第１中間歯車３４および第２中間歯車３６は、外歯のはすば歯車であり、第１中間歯車３４の径が第２中間歯車３６の径よりも大きい。大径の第１中間歯車３４は、第２中間歯車３６よりも軸線Ｎ方向他方側に配置されて、小径の入力歯車３３と噛合する。小径の第２中間歯車３６は、第１中間歯車３４よりも軸線Ｎ方向一方側に配置されて、大径の出力歯車３７と噛合する。 The first intermediate gear 34 and the second intermediate gear 36 are external helical gears, and the diameter of the first intermediate gear 34 is larger than the diameter of the second intermediate gear 36. The large-diameter first intermediate gear 34 is disposed on the other side in the axis N direction with respect to the second intermediate gear 36, and meshes with the small-diameter input gear 33. The small-diameter second intermediate gear 36 is disposed on one side in the axis N direction relative to the first intermediate gear 34 and meshes with the large-diameter output gear 37.
　中間軸３５の軸線Ｎは、図２に示すように、軸線Ｏおよび軸線Ｍよりも上方に配置される。また中間軸３５の軸線Ｎは、軸線Ｏよりも車両前方、軸線Ｍよりも車両後方に配置される。減速部３１は、車両前後方向に間隔を空けて配置されて互いに平行に延びる軸線Ｏ，Ｎ，Ｍを有する３軸の平行軸歯車減速機であり、２段階で減速される。なお図示しない変形例として減速部３１は、複数の中間軸を有する多段階の平行軸歯車減速機であってもよい。 The axis N of the intermediate shaft 35 is disposed above the axis O and the axis M as shown in FIG. In addition, the axis N of the intermediate shaft 35 is arranged in front of the vehicle with respect to the axis O and behind the vehicle with respect to the axis M. The speed reduction unit 31 is a three-axis parallel shaft gear reducer having axes O, N, and M that are arranged at intervals in the vehicle longitudinal direction and extend parallel to each other, and is decelerated in two stages. As a modification (not shown), the speed reduction unit 31 may be a multistage parallel shaft gear reducer having a plurality of intermediate shafts.
　説明を図１に戻すと出力歯車３７は外歯のはすば歯車であり、出力軸３８の軸線Ｏ中央部に同軸に設けられる。出力軸３８は軸線Ｏに沿って延びる。出力軸３８の軸線Ｏ方向一方端部は、内輪１２の中心孔に差し込まれて相対回転不可能に嵌合する。出力軸３８の軸線Ｏ方向中央部は、内輪１２の軸線Ｏ方向他方端部によりも外径側で転がり軸受３８ａを介して、本体ケーシング３９の正面部分３９ｆに回転自在に支持される。出力軸３８の軸線Ｏ方向他方端部は、転がり軸受３８ｂを介して、本体ケーシング３９の背面部分３９ｂに回転自在に支持される。 Returning to FIG. 1, the output gear 37 is a helical gear with external teeth, and is provided coaxially at the center of the axis O of the output shaft 38. The output shaft 38 extends along the axis O. One end of the output shaft 38 in the direction of the axis O is inserted into the center hole of the inner ring 12 and is fitted so as not to be relatively rotatable. The central portion in the axis O direction of the output shaft 38 is rotatably supported by the front portion 39f of the main body casing 39 via the rolling bearing 38a on the outer diameter side with respect to the other end portion in the axis O direction of the inner ring 12. The other end portion of the output shaft 38 in the direction of the axis O is rotatably supported by the back surface portion 39b of the main body casing 39 via the rolling bearing 38b.
　図１に示すように減速部３１は、小径の駆動歯車と大径の従動歯車の噛合、即ち入力歯車３３と第１中間歯車３４の噛合、また第２中間歯車３６と出力歯車３７の噛合、により入力軸３２の回転を減速して出力軸３８に伝達する。減速部３１の入力軸３２から出力軸３８までの回転要素は、モータ部２１の回転を車輪ハブ軸受部１１の内輪１２に伝達する駆動伝達経路を構成する。 As shown in FIG. 1, the speed reduction unit 31 is meshed between a small-diameter drive gear and a large-diameter driven gear, that is, meshed between the input gear 33 and the first intermediate gear 34, and meshed between the second intermediate gear 36 and the output gear 37. Thus, the rotation of the input shaft 32 is decelerated and transmitted to the output shaft 38. The rotating elements from the input shaft 32 to the output shaft 38 of the speed reduction portion 31 constitute a drive transmission path for transmitting the rotation of the motor portion 21 to the inner ring 12 of the wheel hub bearing portion 11.
　本体ケーシング３９は、これまで説明した正面部分３９ｆおよび背面部分３９ｂの他、筒状部分を含む。当該筒状部分は、互いに平行に延びる軸線Ｏ、Ｎ、Ｍを取り囲むように減速部３１の内部部品を覆う。板状の正面部分３９ｆは、減速部３１の内部部品を軸線方向一方側から覆い、筒状部分の一方端と結合する。板状の背面部分３９ｂは、減速部３１の内部部品を軸線方向他方側から覆い、筒状部分の他方端と結合する。本体ケーシング３９の背面部分３９ｂは、モータケーシング２９と結合し、減速部３１の内部空間およびモータ部２１の内部空間を仕切る隔壁でもある。モータケーシング２９は本体ケーシング３９に支持されて、本体ケーシング３９から軸線方向他方側へ突出する。 The main body casing 39 includes a cylindrical part in addition to the front part 39f and the back part 39b described so far. The cylindrical portion covers the internal parts of the speed reducing portion 31 so as to surround the axes O, N, and M extending in parallel with each other. The plate-like front portion 39f covers the internal part of the speed reducing portion 31 from one side in the axial direction, and is coupled to one end of the cylindrical portion. The plate-like back surface portion 39b covers the internal parts of the speed reducing portion 31 from the other side in the axial direction and is coupled to the other end of the cylindrical portion. The back surface portion 39 b of the main body casing 39 is a partition wall that is coupled to the motor casing 29 and partitions the internal space of the speed reduction portion 31 and the internal space of the motor portion 21. The motor casing 29 is supported by the main body casing 39 and protrudes from the main body casing 39 to the other side in the axial direction.
　本体ケーシング３９は、減速部３１の内部空間を区画し、減速部３１の全ての回転要素（回転軸および歯車）を内部空間に収容する。図２に示すように本体ケーシング３９の下部は、オイル貯留部３９ｔとされる。オイル貯留部３９ｔの高さ位置はモータ部２１の下部の高さ位置と重なる。本体ケーシング３９の内部空間の下部を占めるオイル貯留部３９ｔには、モータ部２１および減速部３１を潤滑する潤滑油が貯留する。 The main casing 39 defines an internal space of the speed reduction unit 31 and accommodates all the rotating elements (rotating shafts and gears) of the speed reduction unit 31 in the internal space. As shown in FIG. 2, the lower part of the main body casing 39 is an oil storage part 39t. The height position of the oil storage part 39t overlaps the height position of the lower part of the motor part 21. Lubricating oil that lubricates the motor unit 21 and the speed reduction unit 31 is stored in the oil storage unit 39 t that occupies the lower part of the internal space of the main body casing 39.
　入力軸３２と、中間軸３５と、出力軸３８は、上述した転がり軸受によって両持ち支持される。これらの転がり軸受３２ａ，３５ａ，３８ａ，３２ｂ，３５ｂ，３８ｂはラジアル軸受である。 The input shaft 32, the intermediate shaft 35, and the output shaft 38 are supported at both ends by the above-described rolling bearings. These rolling bearings 32a, 35a, 38a, 32b, 35b, and 38b are radial bearings.
　インホイールモータ駆動装置１０外部からモータ部２１に電力が供給されると、モータ部２１のロータ２３が回転し、モータ回転軸２２から減速部３１に回転を出力する。減速部３１はモータ部２１から入力軸３２に入力された回転を減速し、出力軸３８から車輪ハブ軸受部１１へ出力する。車輪ハブ軸受部１１の内輪１２は、出力軸３８と同じ回転数で回転し、内輪１２に取付固定される車輪ホイールＷを駆動する。 When power is supplied to the motor unit 21 from the outside of the in-wheel motor drive device 10, the rotor 23 of the motor unit 21 rotates and outputs rotation from the motor rotation shaft 22 to the speed reduction unit 31. The deceleration unit 31 decelerates the rotation input from the motor unit 21 to the input shaft 32 and outputs the rotation from the output shaft 38 to the wheel hub bearing unit 11. The inner ring 12 of the wheel hub bearing portion 11 rotates at the same rotational speed as the output shaft 38 and drives a wheel wheel W that is attached and fixed to the inner ring 12.
　図３は本発明の第１実施形態になるインホイールモータ駆動装置と動力線の接続構造を示す断面図である。モータ部２１の外周には、インホイールモータ駆動装置１０外部に設置される図示しないインバータから延びる３本の動力線４１を引き込むための端子ボックス２５が設けられる。動力線４１はインホイールモータ駆動装置１０、特にモータ部２１、に電力を供給する。３本の動力線４１は全て同じ構造であるため、以下の説明では１本の動力線４１を代表して説明する。 FIG. 3 is a cross-sectional view showing a connection structure between the in-wheel motor driving device and the power line according to the first embodiment of the present invention. A terminal box 25 for drawing in three power lines 41 extending from an inverter (not shown) installed outside the in-wheel motor drive device 10 is provided on the outer periphery of the motor unit 21. The power line 41 supplies power to the in-wheel motor drive device 10, particularly the motor unit 21. Since all the three power lines 41 have the same structure, the following description will be made on behalf of one power line 41.
　端子ボックス２５は、モータ部２１の上部に設けられ、モータケーシング２９に隣接する。モータケーシング２９は、ロータ２３（図１）およびステータ２４（図１）を収容するモータ部２１の内部空間Ｌと、端子ボックス２５の内部空間Ｍを仕切る。 The terminal box 25 is provided on the upper part of the motor unit 21 and is adjacent to the motor casing 29. The motor casing 29 partitions the internal space L of the motor unit 21 that houses the rotor 23 (FIG. 1) and the stator 24 (FIG. 1) from the internal space M of the terminal box 25.
　すなわちモータケーシング２９は、端子ボックス２５の底壁を兼用し、端子ボックス２５の底部を区画する。また端子ボックス２５は、モータケーシング２９の外周面に立設される側壁５１によって四方を区画される。側壁５１は例えば四角い枠状であり、モータケーシング２９に一体形成される。このため側壁５１の材質は、モータケーシング２９の材質と同一であり、例えばアルミニウム合金である。 That is, the motor casing 29 also serves as the bottom wall of the terminal box 25 and defines the bottom of the terminal box 25. The terminal box 25 is divided into four sides by a side wall 51 erected on the outer peripheral surface of the motor casing 29. The side wall 51 has, for example, a rectangular frame shape and is integrally formed with the motor casing 29. For this reason, the material of the side wall 51 is the same as the material of the motor casing 29, for example, an aluminum alloy.
　側壁５１の上縁には頂壁５２が取り外し可能に固定される。頂壁５２は例えば四角い板であり、端子ボックス２５の頂部を区画する蓋である。端子ボックス２５の内部空間Ｍはこれらの壁によって端子ボックス２５の外部から遮断され、外部から雨水や異物が侵入しない。 The top wall 52 is detachably fixed to the upper edge of the side wall 51. The top wall 52 is, for example, a square plate and is a lid that defines the top of the terminal box 25. The internal space M of the terminal box 25 is blocked from the outside of the terminal box 25 by these walls, and rainwater and foreign matter do not enter from the outside.
　動力線４１は導電性の撚り線からなる芯線４１ｃと、この芯線４１ｃを被覆するビニール等の被覆層４１ｄを有する絶縁ケーブルである。動力線４１の端部では、被覆層４１ｄを剥がされ、芯線４１ｃが露出する。かかる芯線４１ｃの先端には金属端子４２が圧着される。 The power line 41 is an insulated cable having a core wire 41c made of a conductive stranded wire and a covering layer 41d such as vinyl covering the core wire 41c. At the end of the power line 41, the coating layer 41d is peeled off, and the core line 41c is exposed. A metal terminal 42 is crimped to the tip of the core wire 41c.
　動力線４１のうち被覆層４１ｄが残されている端部領域の外周面には、動力線固定部材４３が固定される。動力線固定部材４３は、円筒部４４とフランジ部４５を有する。円筒部４４の内径は動力線４１の外径と略等しくされ、全周に亘って動力線４１の外周面と隙間なく嵌合する。 A power line fixing member 43 is fixed to the outer peripheral surface of the end region of the power line 41 where the coating layer 41d remains. The power line fixing member 43 has a cylindrical portion 44 and a flange portion 45. The inner diameter of the cylindrical portion 44 is substantially equal to the outer diameter of the power line 41 and is fitted to the outer peripheral surface of the power line 41 without a gap over the entire circumference.
　フランジ部４５は、円筒部４４の先端よりもやや後端寄りの外周面に立設される平坦な板である。フランジ部４５は円筒部４４に一体形成され、円筒部４４と同一材料からなる。 The flange portion 45 is a flat plate erected on the outer peripheral surface slightly closer to the rear end than the front end of the cylindrical portion 44. The flange portion 45 is integrally formed with the cylindrical portion 44 and is made of the same material as the cylindrical portion 44.
　動力線固定部材４３は金属製であり、具体的にはアルミニウム合金からなる。この場合、動力線固定部材４３を、モータケーシング２９および端子ボックス２５の側壁５１と同じ材質にすることができる。 The power line fixing member 43 is made of metal, specifically, an aluminum alloy. In this case, the power line fixing member 43 can be made of the same material as the motor casing 29 and the side wall 51 of the terminal box 25.
　あるいは動力線固定部材４３は他の金属、例えばステンレス鋼（１８Ｃｒ－８Ｎｉステンレス鋼）であってもよい。ステンレス鋼は、強度が大きく、腐食に強いため、長期間に亘って動力線４１を保持することができる。またステンレス鋼製の動力線固定部材４３は外力に対する耐性が大きいことから、動力線４１が引っ張られても容易に変形・破損・分離しない。 Alternatively, the power line fixing member 43 may be another metal, for example, stainless steel (18Cr-8Ni stainless steel). Stainless steel has a high strength and is resistant to corrosion, and therefore can hold the power line 41 for a long period of time. Further, since the power line fixing member 43 made of stainless steel has a high resistance to external force, it is not easily deformed, broken or separated even when the power line 41 is pulled.
　なお動力線固定部材４３の筒部４４には表面防錆処理が施されるとよい。表面防錆処理は例えば、亜鉛メッキ処理、クロムメッキ処理、ニッケルメッキ処理、あるいはジオメット（登録商標）による表面処理であり、筒部４４の表面に皮膜を形成して筒部４４を保護する。あるいは筒部４４表面に樹脂からなる薄膜を形成する表面処理であってもよい。 It should be noted that the cylinder portion 44 of the power line fixing member 43 may be subjected to surface rust prevention treatment. The surface rust prevention treatment is, for example, a zinc plating treatment, a chrome plating treatment, a nickel plating treatment, or a surface treatment by Geomet (registered trademark), and the tubular portion 44 is protected by forming a film on the surface of the tubular portion 44. Alternatively, it may be a surface treatment in which a thin film made of resin is formed on the surface of the cylindrical portion 44.
　これに対しフランジ部４５には表面防錆処理が施されない。フランジ部４５の端面を端子ボックス２５の表面に電気的に接続するためである。 In contrast, the flange portion 45 is not subjected to surface rust prevention treatment. This is because the end face of the flange portion 45 is electrically connected to the surface of the terminal box 25.
　端子ボックス２５の側壁５１には貫通孔５１ｈが形成される。貫通孔５１ｈが穿設される側壁５１の表面は、円板形状のモータケーシングカバー２９ｖと同様、車幅方向内側（インボード側）へ指向する。貫通孔５１ｈには動力線固定部材４３の一端部が差し込まれる。これにより動力線４１の一端部は、端子ボックス２５の内部空間Ｍに引き込まれる。 A through hole 51 h is formed in the side wall 51 of the terminal box 25. The surface of the side wall 51 in which the through hole 51h is formed is directed inward in the vehicle width direction (inboard side), like the disc-shaped motor casing cover 29v. One end of the power line fixing member 43 is inserted into the through hole 51h. As a result, one end of the power line 41 is drawn into the internal space M of the terminal box 25.
　内部空間Ｍに引き込まれた動力線４１の先端には、金属端子４２が圧着される。金属端子４２は金属板からなる先端部４２ｂを有する。先端部４２ｂには貫通孔４２ｈが形成される。貫通孔４２ｈにはボルト４６が通される。ボルト４６の軸部は、導電棒２６の一端に形成されたねじ穴２６ｔに螺合する。これにより金属端子４２は、内部空間Ｍにおいて導電棒２６の一端に接続固定される。 The metal terminal 42 is crimped to the tip of the power line 41 drawn into the internal space M. The metal terminal 42 has a tip 42b made of a metal plate. A through hole 42h is formed in the tip portion 42b. Bolts 46 are passed through the through holes 42h. The shaft portion of the bolt 46 is screwed into a screw hole 26 t formed at one end of the conductive rod 26. Thereby, the metal terminal 42 is connected and fixed to one end of the conductive rod 26 in the internal space M.
　導電棒２６は、モータケーシング２９の壁を貫通して延びる。導電棒２６の外周は環状の絶縁材３０に覆われる。これにより導電棒２６はモータケーシング２９から電気的に絶縁される。 The conductive rod 26 extends through the wall of the motor casing 29. The outer periphery of the conductive rod 26 is covered with an annular insulating material 30. As a result, the conductive rod 26 is electrically insulated from the motor casing 29.
　導電棒２６の一端は端子ボックス２５の内部空間Ｍに配置され、他端はモータケーシング２９の内部空間Ｌに配置される。かかる他端は内部空間Ｌで、ステータ２４（図１）に巻回される図示しないコイルに接続される。 One end of the conductive rod 26 is disposed in the internal space M of the terminal box 25, and the other end is disposed in the internal space L of the motor casing 29. The other end is an internal space L and is connected to a coil (not shown) wound around the stator 24 (FIG. 1).
　端子ボックス２５の貫通孔５１ｈに差し込まれる円筒部４４の一端部には、円筒部４４の外周面を周回して延びる環状溝と、この環状溝に嵌合するＯリング４８が設けられる。Ｏリング４８は、シール材であって、貫通孔５１ｈの内周面と円筒部４４の外周面の環状隙間を封止する。 At one end of the cylindrical portion 44 inserted into the through hole 51h of the terminal box 25, an annular groove extending around the outer peripheral surface of the cylindrical portion 44 and an O-ring 48 fitted to the annular groove are provided. The O-ring 48 is a sealing material and seals an annular gap between the inner peripheral surface of the through hole 51 h and the outer peripheral surface of the cylindrical portion 44.
　円筒部４４の一端側に形成されるフランジ部４５は、端子ボックス２５の側壁５１に突き合わされる。ここで附言するとフランジ部４５は、一定外径の円環ではなく、一部の周方向位置が他の周方向位置よりも外径側へ大きく突出するように形成される（図４の舌部４５ｚを参照）。フランジ部４５のかかる舌部４５ｚには一方端面から他方端面まで延びる貫通孔が形成される。かかる貫通孔には図３に示すボルト４７の軸部４７ｂが挿通される。 The flange portion 45 formed on one end side of the cylindrical portion 44 is abutted against the side wall 51 of the terminal box 25. In this case, the flange portion 45 is not an annular ring having a constant outer diameter, but is formed so that a part of the circumferential position protrudes more to the outer diameter side than the other circumferential position (the tongue of FIG. 4). Part 45z). The tongue portion 45z of the flange portion 45 is formed with a through hole extending from one end surface to the other end surface. The shaft portion 47b of the bolt 47 shown in FIG. 3 is inserted through the through hole.
　ボルト４７と、側壁５１に形成されたねじ穴５１ｔは、フランジ部４５の一部分を端子ボックス２５に固定する固定手段である。ねじ穴５１ｔは、貫通孔５１ｈと平行に延びる。ボルト４７の軸部４７ｂがねじ穴５１ｔに螺合し、ボルト４７の頭部４７ｃが締め付けられてフランジ部４５を側壁５１の表面に押し付けることにより、動力線４１の端子ボックス２５への接続固定が成立する。かかる固定手段によってフランジ部４５の端面が端子ボックス２５の表面に突き合わされる。 The bolt 47 and the screw hole 51 t formed in the side wall 51 are fixing means for fixing a part of the flange portion 45 to the terminal box 25. The screw hole 51t extends in parallel with the through hole 51h. The shaft portion 47b of the bolt 47 is screwed into the screw hole 51t, and the head portion 47c of the bolt 47 is tightened to press the flange portion 45 against the surface of the side wall 51, thereby fixing the connection of the power line 41 to the terminal box 25. To establish. The end surface of the flange portion 45 is abutted against the surface of the terminal box 25 by such fixing means.
　図４は側壁５１の表面を示す正面図であり、貫通孔５１ｈの貫通方向にみた状態を表す。参考のため図４には円筒部４４およびフランジ部４５を仮想線で表す。側壁５１の表面５１ｉは平坦面である。側壁５１には、表面５１ｉのうち貫通孔５１ｈを囲繞する動力線側領域５１ｊと、ねじ穴５１ｔを囲繞する固定側領域５１ｋを残して、肉抜き部５１ｃが形成される。肉抜き部５１ｃは、表面５１ｉ、動力線側領域５１ｊ、および固定側領域５１ｋから窪んだ凹部である。動力線側領域５１ｊおよび固定側領域５１ｋは面一の平坦面である。なお図４中、動力線側領域５１ｊおよび固定側領域５１ｋにはハッチングを附してある。 FIG. 4 is a front view showing the surface of the side wall 51, and shows a state seen in the penetration direction of the through hole 51h. For reference, the cylindrical portion 44 and the flange portion 45 are represented by phantom lines in FIG. The surface 51i of the side wall 51 is a flat surface. The side wall 51 is formed with a lightening portion 51c leaving a power line side region 51j surrounding the through hole 51h and a fixed side region 51k surrounding the screw hole 51t in the surface 51i. The lightening portion 51c is a recess that is recessed from the surface 51i, the power line side region 51j, and the fixed side region 51k. The power line side region 51j and the fixed side region 51k are flush with each other. In FIG. 4, the power line side region 51j and the fixed side region 51k are hatched.
　肉抜き部５１ｃの形状は、フランジ部４５よりも一回り大きくされ、フランジ部４５の外周縁を覆う。このためフランジ部４５の端面は表面５１ｉと接触しない。肉抜き部５１ｃは、境界部分５１ｄ、動力線側部分５１ｅ、および固定側部分５１ｆを含む。境界部分５１ｄは、面一に形成される動力線側領域５１ｊと固定側領域５１ｋを隔てる境界になる。動力線側部分５１ｅは、境界部分５１ｄに隣接し、動力線側領域５１ｊを囲繞する。固定側部分５１ｆは、境界部分５１ｄに隣接し、固定側領域５１ｋを囲繞する。 The shape of the thinned portion 51 c is made slightly larger than the flange portion 45 and covers the outer peripheral edge of the flange portion 45. For this reason, the end surface of the flange part 45 does not contact the surface 51i. The lightening portion 51c includes a boundary portion 51d, a power line side portion 51e, and a fixed side portion 51f. The boundary portion 51d is a boundary that separates the power line side region 51j and the fixed side region 51k that are formed flush with each other. The power line side portion 51e is adjacent to the boundary portion 51d and surrounds the power line side region 51j. The fixed side portion 51f is adjacent to the boundary portion 51d and surrounds the fixed side region 51k.
　ボルト４７（図３）を締め付けた状態で、フランジ部４５の端面は動力線側領域５１ｊおよび固定側領域５１ｋに突き合わされる。動力線側領域５１ｊおよび固定側領域５１ｋに対応して、フランジ部４５の端面は、ねじ穴５１ｔに近く円筒部４４から遠い固定側領域（固定側領域５１ｋと同じ）と、ねじ穴５１ｔから遠く円筒部４４に近く円筒部４４を囲繞する動力線側領域（動力線側領域５１ｊと同じ）と、これら固定側領域および動力線側領域を分断する境界領域を含む。フランジ部４５の端面の境界領域は、肉抜き部５１ｃの境界部分５１ｄと重なることによって、境界部分５１ｄの底面から離隔される。 When the bolt 47 (FIG. 3) is tightened, the end face of the flange portion 45 is abutted against the power line side region 51j and the fixed side region 51k. Corresponding to the power line side region 51j and the fixed side region 51k, the end face of the flange portion 45 is close to the screw hole 51t and far from the cylindrical portion 44 (same as the fixed side region 51k) and far from the screw hole 51t. A power line side region (same as the power line side region 51j) that surrounds the cylindrical portion 44 near the cylindrical portion 44 and a boundary region that divides the fixed side region and the power line side region are included. The boundary region of the end surface of the flange portion 45 is separated from the bottom surface of the boundary portion 51d by overlapping with the boundary portion 51d of the thinned portion 51c.
　本実施形態では、フランジ部４５の端面全体が側壁５１表面に突き合わさるのではなく、肉抜き部５１ｃによって、フランジ部４５端面の一部が側壁５１表面から離隔される。具体的には、フランジ部４５端面の動力線側領域が側壁５１表面の動力線側領域５１ｊに突き合わされる。またフランジ部４５端面の固定側領域が側壁５１表面の固定側領域５１ｋに突き合わされる。そしてフランジ部４５端面の境界領域が、図３に示すように境界部分５１ｄの底面から離隔される。これにより突き合わせ面の動力線側領域５１ｊと突き合わせ面の固定側領域５１ｋが分断される。 In the present embodiment, the entire end surface of the flange portion 45 does not abut against the surface of the side wall 51, but a part of the end surface of the flange portion 45 is separated from the surface of the side wall 51 by the thinned portion 51c. Specifically, the power line side region on the end face of the flange 45 is abutted against the power line side region 51j on the surface of the side wall 51. Further, the fixed side region of the end face of the flange portion 45 is abutted against the fixed side region 51k of the side wall 51 surface. And the boundary area | region of the flange part 45 end surface is spaced apart from the bottom face of the boundary part 51d, as shown in FIG. Thereby, the power line side region 51j of the butted surface and the fixed side region 51k of the butted surface are divided.
　このように本実施形態によれば、フランジ部４５と重なる肉抜き部５１ｃを側壁５１表面に設けることから、フランジ部４５と側壁５１の突き合わせ面が少なくなる。したがって雨水が突き合わせ面に進入する虞を少なくすることができる。また万一雨水が突き合わせ面に進入しても雨水は肉抜き部５１ｃへ排出される。かかる作用により、動力線固定部材４３と端子ボックス２５との接続固定箇所の腐食を防止することができる。 Thus, according to the present embodiment, since the thinned portion 51c that overlaps the flange portion 45 is provided on the surface of the side wall 51, the abutting surface between the flange portion 45 and the side wall 51 is reduced. Therefore, the possibility that rainwater enters the abutting surface can be reduced. Even if rainwater enters the abutting surface, the rainwater is discharged to the meat removal portion 51c. By such an action, corrosion of the connection fixing portion between the power line fixing member 43 and the terminal box 25 can be prevented.
　動力線固定部材４３は金属製であることから、樹脂製のものよりも強度が大きい。これにより動力線４３と端子ボックス２５の接続箇所の耐久性が向上する。動力線固定部材４３は大電流を供給する動力線４１に設けられるため帯電する虞がある。本実施形態の動力線固定部材４３のフランジ部４５は、動力線側領域５１ｊおよび固定側領域５１ｋで端子ボックス２５の側壁５１に接触するため、動力線固定部材４３のアース機能を確保することができる。したがって動力線固定部材４３の帯電を防止できる。 Since the power line fixing member 43 is made of metal, its strength is higher than that of resin. Thereby, durability of the connection location of the power line 43 and the terminal box 25 improves. Since the power line fixing member 43 is provided on the power line 41 that supplies a large current, there is a risk of charging. Since the flange portion 45 of the power line fixing member 43 of the present embodiment contacts the side wall 51 of the terminal box 25 in the power line side region 51j and the fixed side region 51k, the grounding function of the power line fixing member 43 can be ensured. it can. Therefore, charging of the power line fixing member 43 can be prevented.
　本実施形態では、互いに突き合わされるフランジ部４５端面の動力線側領域と側壁５１表面の動力線側領域５１ｊの間にシール層が形成される。このシール層は例えば、動力線固定部材４３を端子ボックス２５に接続する作業において、動力線側領域５１ｊに液状ガスケットを塗布しておき、接続固定後に液状ガスケットが硬化したものである。 In the present embodiment, a seal layer is formed between the power line side region on the end face of the flange portion 45 and the power line side region 51j on the surface of the side wall 51. For example, in the operation of connecting the power line fixing member 43 to the terminal box 25, the seal layer is obtained by applying a liquid gasket to the power line side region 51j and curing the liquid gasket after the connection is fixed.
　このシール層により、環状の動力線側領域５１ｊにおいてフランジ部４５と側壁５１が隙間なく密着する。したがって雨水等による動力線側領域５１ｊの腐食を確実に防止することができる。なお固定側領域５１ｋではボルト４７の締め付け力によってフランジ部４５と側壁５１が密着するため、シール層を省略可能である。 This flange seals the flange 45 and the side wall 51 tightly in the annular power line side region 51j. Therefore, corrosion of the power line side region 51j due to rain water or the like can be reliably prevented. In the fixed side region 51k, the flange portion 45 and the side wall 51 are brought into close contact with each other by the tightening force of the bolt 47, so that the seal layer can be omitted.
　また本実施形態では、動力線固定部材４３を端子ボックス２５に接続する作業において余分な液状ガスケットは肉抜き部５１ｃに流れ込み、固定側領域５１ｋに付着しない。したがって動力線固定部材４３は固定側領域５１ｋで側壁５１に直接密着し、動力線固定部材４３のアース機能を得ることができる。 In this embodiment, in the operation of connecting the power line fixing member 43 to the terminal box 25, the excess liquid gasket flows into the lightening portion 51c and does not adhere to the fixed side region 51k. Therefore, the power line fixing member 43 can be in direct contact with the side wall 51 in the fixed side region 51k, and the ground function of the power line fixing member 43 can be obtained.
　また本実施形態では、ボルト４７の表面に防錆効果を向上させる処理を施してよい。これによりボルト４７の腐食を抑制することができる。しかもフランジ部４５表面は固定側領域５１ｋで端子ボックス２５の表面と接続するため、フランジ部４５のアース機能は損なわれない。なおボルト４７に施す表面防錆処理として例えば、亜鉛メッキ処理、クロムメッキ処理、ニッケルメッキ処理、あるいはジオメット（登録商標）による表面処理である。かかる表面処理により、ボルト４７の表面に皮膜を形成してボルト４７を保護する。 In this embodiment, the surface of the bolt 47 may be subjected to a treatment for improving the rust prevention effect. Thereby, corrosion of the bolt 47 can be suppressed. Moreover, since the surface of the flange portion 45 is connected to the surface of the terminal box 25 at the fixed side region 51k, the grounding function of the flange portion 45 is not impaired. Note that the surface rust prevention treatment applied to the bolt 47 is, for example, zinc plating treatment, chrome plating treatment, nickel plating treatment, or surface treatment by Geomet (registered trademark). By such surface treatment, a film is formed on the surface of the bolt 47 to protect the bolt 47.
　また本実施形態の端子ボックス２５の側壁５１はアルミニウム合金製であり、動力線固定部材４３もアルミニウム合金製である。同じ材質にすることにより端子ボックス２５と動力線固定部材４３のイオン化傾向の差を無くして、両者の間で腐食が進行することを防止することができる。 Further, the side wall 51 of the terminal box 25 of the present embodiment is made of an aluminum alloy, and the power line fixing member 43 is also made of an aluminum alloy. By using the same material, the difference in ionization tendency between the terminal box 25 and the power line fixing member 43 can be eliminated, and corrosion can be prevented from proceeding between the two.
　また本実施形態において動力線固定部材４３の筒部４４表面は、亜鉛メッキ処理が施され、あるいはクロムメッキ処理が施され、あるいはニッケルメッキ処理が施される。このような表面防錆処理を円筒部４４に施すことにより、動力線固定部材４３がアルミニウム合金およびステンレス鋼よりも錆び易い金属で形成される場合であっても、腐食の進行を抑制することができる。 Further, in the present embodiment, the surface of the cylindrical portion 44 of the power line fixing member 43 is subjected to galvanizing treatment, chrome plating treatment, or nickel plating treatment. By applying such surface rust prevention treatment to the cylindrical portion 44, even if the power line fixing member 43 is formed of a metal that rusts more easily than aluminum alloy and stainless steel, the progress of corrosion can be suppressed. it can.
　次に本発明の変形例を説明する。図５は本発明の変形例を示す正面図であり、側壁５１に形成される貫通孔５１ｈの貫通方向にみた状態を表す。図５の変形例につき、前述した実施形態と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。図５の変形例では、側壁５１の表面に、枠形状の肉抜き部５１ｃ（図４）に代えて、溝形状に肉抜きされた境界部分５１ｄを形成する。 Next, a modified example of the present invention will be described. FIG. 5 is a front view showing a modified example of the present invention, and shows a state seen in the penetration direction of the through hole 51 h formed in the side wall 51. About the modification of FIG. 5, about the structure which is common in embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and a different structure is demonstrated below. In the modification of FIG. 5, a boundary portion 51 d that is thinned into a groove shape is formed on the surface of the side wall 51 in place of the frame-shaped thinned portion 51 c (FIG. 4).
　図５に示すように溝形状の境界部分５１ｄは、フランジ部４５を横切るように延び、動力線側領域５１ｊと固定側領域５１ｋを分断する。 As shown in FIG. 5, the groove-shaped boundary portion 51d extends across the flange portion 45, and divides the power line side region 51j and the fixed side region 51k.
　図５に示す変形例によっても、フランジ部４５の端面が境界部分５１ｄで端子ボックス２５の表面から離隔される。したがってフランジ部４５と端子ボックス２５の突き合わせ面が少なくなり、雨水が突き合わせ面に進入する虞を少なくすることができる。万一、突き合わせ面に雨水等が侵入しても、かかる雨水を境界部分５１ｄへ速やかに排出することができる。この作用により、動力線固定部材４３と端子ボックス２５との接続固定箇所の腐食を防止することができる。 5 also, the end face of the flange portion 45 is separated from the surface of the terminal box 25 by the boundary portion 51d. Therefore, the abutting surfaces of the flange portion 45 and the terminal box 25 are reduced, and the possibility that rainwater enters the abutting surface can be reduced. Should rainwater or the like enter the abutting surface, such rainwater can be quickly discharged to the boundary portion 51d. This action can prevent corrosion at the connecting and fixing portion between the power line fixing member 43 and the terminal box 25.
　また図５に示す変形例によっても、固定側領域５１ｋでフランジ部４５と側壁５１が接触し、動力線固定部材４３のアース機能を得ることができる。また動力線側領域５１ｊにシール層を設けることにより、雨水等の進入を防止して、動力線側領域５１ｊの腐食を防止することができる。 Further, according to the modification shown in FIG. 5, the flange portion 45 and the side wall 51 are in contact with each other in the fixed region 51 k, and the ground function of the power line fixing member 43 can be obtained. Further, by providing a seal layer in the power line side region 51j, it is possible to prevent rainwater or the like from entering and prevent the power line side region 51j from corroding.
　図示しない変形例として、シール層を動力線側領域５１ｊに代えて固定側領域５１ｋに設けてもよい。かかる場合であっても、動力線側領域５１ｊでフランジ部４５と側壁５１が直接接触し、動力線固定部材４３のアース機能を得ることができる。 As a modification (not shown), a seal layer may be provided in the fixed side region 51k instead of the power line side region 51j. Even in such a case, the flange 45 and the side wall 51 are in direct contact with each other in the power line side region 51j, and the ground function of the power line fixing member 43 can be obtained.
　次に本発明の他の変形例を説明する。図６は本発明の他の変形例を示す正面図であり、側壁５１に形成される貫通孔５１ｈの貫通方向にみた状態を表す。図６の変形例につき、前述した実施形態と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。 Next, another modification of the present invention will be described. FIG. 6 is a front view showing another modified example of the present invention, and shows a state viewed in the penetrating direction of the through hole 51 h formed in the side wall 51. In the modification of FIG. 6, the same reference numerals are assigned to configurations common to the above-described embodiment, description thereof is omitted, and different configurations are described below.
　上述して図４および図５に示す実施形態では、フランジ部４５（仮想線）の周方向に関し、周方向一箇所が残りの周方向位置よりも外径側へ突出して、舌部４５ｚを構成する。これに対し図６に示す他の変形例では、フランジ部４５（仮想線）の周方向に関し、複数箇所が残りの周方向位置よりも外径側へ突出する。具体的には筒部４４の軸線に直交して真っ直ぐ延びる基準線Ｐに関し、基準線Ｐの一方および他方（筒部４４の外径方向）へ突出して舌部４５ｚ，４５ｚを構成する。このため図６に示すように、フランジ部４５の周方向２箇所が筒部４４から外径側へ大きく突出して舌部４５ｚを構成する。各舌部４５ｚには、固定手段としてのボルトが挿通される貫通孔が形成される。また各貫通孔に対応する側壁５１表面の２箇所には、ねじ穴５１ｔ，５１ｔが形成される。ねじ穴５１ｔ，５１ｔは、貫通孔５１ｈからみて周方向１８０°の間隔で配置される。 In the embodiment shown in FIGS. 4 and 5 as described above, with respect to the circumferential direction of the flange portion 45 (virtual line), one portion in the circumferential direction protrudes to the outer diameter side from the remaining circumferential position, thereby forming the tongue portion 45z. To do. On the other hand, in another modified example shown in FIG. 6, with respect to the circumferential direction of the flange portion 45 (virtual line), a plurality of locations protrude toward the outer diameter side from the remaining circumferential position. Specifically, with respect to the reference line P that extends straightly perpendicular to the axis of the cylinder part 44, the tongues 45z and 45z are formed by projecting to one and the other of the reference lines P (in the outer diameter direction of the cylinder part 44). For this reason, as shown in FIG. 6, two locations in the circumferential direction of the flange portion 45 protrude greatly from the cylindrical portion 44 toward the outer diameter side to form a tongue portion 45z. Each tongue 45z is formed with a through hole through which a bolt as a fixing means is inserted. Screw holes 51t and 51t are formed at two locations on the surface of the side wall 51 corresponding to each through hole. The screw holes 51t and 51t are arranged at an interval of 180 ° in the circumferential direction when viewed from the through hole 51h.
　各ねじ穴５１ｔは、固定側領域５１ｋで囲繞される。フランジ部４５の各舌部４５ｚはこれら２箇所の固定側領域５１ｋで端子ボックス２５の表面にそれぞれ接続する。 Each screw hole 51t is surrounded by a fixed-side region 51k. Each tongue portion 45z of the flange portion 45 is connected to the surface of the terminal box 25 at these two fixed-side regions 51k.
　側壁５１の表面には複数の溝状の境界部分５１ｄ，５１ｄが設けられる。図６の変形例では肉抜き部として２本の境界部分５１ｄが設けられる。これらの境界部分５１ｄは、貫通孔５１ｈを挟んで互いに平行に延びるように配置されて、１箇所の動力線側領域５１ｊと２箇所の固定側領域５１ｋを分断する。 A plurality of groove- like boundary portions 51d and 51d are provided on the surface of the side wall 51. In the modified example of FIG. 6, two boundary portions 51d are provided as the lightening portions. These boundary portions 51d are arranged so as to extend in parallel with each other across the through hole 51h, and divide one power line side region 51j and two fixed side regions 51k.
　図６に示す他の変形例によっても、２本の溝状の境界部分５１ｄ，５１ｄによってフランジ部４５の端面が端子ボックス２５の表面から離隔される。したがってフランジ部４５端面と端子ボックス２５表面の突き合わせ面が少なくなり、雨水が突き合わせ面に進入する虞を少なくすることができる。万一、突き合わせ面に雨水等が侵入しても、かかる雨水を境界部分５１ｄへ速やかに排出することができる。この作用により、動力線固定部材４３と端子ボックス２５との接続固定箇所の腐食を防止することができる。 6, the end face of the flange portion 45 is separated from the surface of the terminal box 25 by the two groove- like boundary portions 51d and 51d. Therefore, the abutting surface between the end face of the flange portion 45 and the surface of the terminal box 25 is reduced, and the possibility that rainwater enters the abutting surface can be reduced. Should rainwater or the like enter the abutting surface, such rainwater can be quickly discharged to the boundary portion 51d. This action can prevent corrosion at the connecting and fixing portion between the power line fixing member 43 and the terminal box 25.
　動力線側領域５１ｊおよび固定側領域５１ｋのいずれか一方には、液状ガスケットが硬化したシール層、あるいはゴムシートからなる電気絶縁性のシール層が設けられてもよい。あるいはシール層を設けることなく、動力線側領域５１ｊおよび固定側領域５１ｋでフランジ部４５を端子ボックス２５の表面に接触されてもよい。これにより動力線固定部材４３のアース機能を得ることができる。 In either one of the power line side region 51j and the fixed side region 51k, a seal layer in which the liquid gasket is cured or an electrically insulating seal layer made of a rubber sheet may be provided. Alternatively, the flange portion 45 may be brought into contact with the surface of the terminal box 25 in the power line side region 51j and the fixed side region 51k without providing a seal layer. Thereby, the grounding function of the power line fixing member 43 can be obtained.
　次に本発明のさらに他の変形例を説明する。図７は本発明のさらに他の変形例を示す正面図であり、側壁５１に形成される貫通孔５１ｈの貫通方向にみた状態を表す。図７の変形例につき、前述した実施形態と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。 Next, still another modification of the present invention will be described. FIG. 7 is a front view showing still another modified example of the present invention, and shows a state viewed in the penetration direction of the through hole 51 h formed in the side wall 51. With respect to the modified example of FIG. 7, the same components as those in the above-described embodiment are denoted by the same reference numerals, description thereof will be omitted, and different configurations will be described below.
　図７の変形例では、複数本の貫通孔５１ｈが互いに平行に配置される。３本の貫通孔５１ｈは１列に整列する。動力線側領域５１ｊは全ての貫通孔５１ｈを囲繞するひと続きの領域である。また動力線固定部材４３は、各貫通孔５１ｈに挿通される円筒部４４を複数有するとともに、これら円筒部４４を結合する１枚の大きなフランジ部４５を有する。 7, a plurality of through holes 51h are arranged in parallel to each other. The three through holes 51h are aligned in one row. The power line side region 51j is a continuous region surrounding all the through holes 51h. The power line fixing member 43 includes a plurality of cylindrical portions 44 that are inserted through the through holes 51 h and a single large flange portion 45 that couples the cylindrical portions 44.
　３本の円筒部４４は、整列して互いに平行に延びる。フランジ部４５は、円筒部４４よりも少ない２枚の舌部４５ｚを含む。各舌部４５ｚは円筒部４４の整列方向と直交する方向に突出する。 The three cylindrical portions 44 are aligned and extend in parallel with each other. The flange portion 45 includes two tongue portions 45 z that are fewer than the cylindrical portion 44. Each tongue 45z protrudes in a direction orthogonal to the alignment direction of the cylindrical portion 44.
　一方の舌部４５ｚは、整列方向一方の円筒部４４から外径側へ突出するように形成される。他方の舌部４５ｚは、整列方向他方の円筒部４４から外径側へ突出するように形成される。これら２枚の舌部４５ｚは、互いに平行に突出する。 The one tongue portion 45z is formed so as to protrude from the one cylindrical portion 44 in the alignment direction to the outer diameter side. The other tongue portion 45z is formed so as to protrude from the other cylindrical portion 44 in the alignment direction to the outer diameter side. These two tongue portions 45z protrude in parallel with each other.
　各舌部４５ｚは、各ねじ穴５１ｔを囲繞する固定側領域５１ｋにそれぞれ突き合わされる。図７に示す変形例では、２本のねじ穴５１ｔが設けられる。３本の貫通孔５１ｈおよび２本のねじ穴５１ｔの配置はそれぞれ、３本の円筒部４４および２枚の舌部４５ｚの配置と対応する。 Each tongue 45z is abutted against a fixed region 51k surrounding each screw hole 51t. In the modification shown in FIG. 7, two screw holes 51t are provided. The arrangement of the three through holes 51h and the two screw holes 51t corresponds to the arrangement of the three cylindrical portions 44 and the two tongue portions 45z, respectively.
　図７に示す変形例の肉抜き部５１ｃは、境界部分５１ｄ、動力線側部分５１ｅ、および固定側部分５１ｆを含む。境界部分５１ｄは、面一に形成される動力線側領域５１ｊと固定側領域５１ｋを隔てる境界になる。動力線側部分５１ｅは、境界部分５１ｄに隣接し、ひと続きの動力線側領域５１ｊを囲繞する。固定側部分５１ｆは、境界部分５１ｄに隣接し、各固定側領域５１ｋを囲繞する。 7 includes a boundary portion 51d, a power line side portion 51e, and a fixed side portion 51f. The boundary portion 51d is a boundary that separates the power line side region 51j and the fixed side region 51k that are formed flush with each other. The power line side portion 51e is adjacent to the boundary portion 51d and surrounds the continuous power line side region 51j. The fixed-side portion 51f is adjacent to the boundary portion 51d and surrounds each fixed-side region 51k.
　図７に示すさらに他の変形例によっても、肉抜き部５１ｃによってフランジ部４５の端面が端子ボックス２５の表面から離隔される。したがってフランジ部４５端面と端子ボックス２５表面の突き合わせ面が少なくなり、雨水が突き合わせ面に進入する虞を少なくすることができる。万一、突き合わせ面に雨水等が侵入しても、かかる雨水を肉抜き部５１ｃへ速やかに排出することができる。この作用により、動力線固定部材４３と端子ボックス２５との接続固定箇所の腐食を防止することができる。 7, the end surface of the flange portion 45 is separated from the surface of the terminal box 25 by the thinned portion 51c. Therefore, the abutting surface between the end face of the flange portion 45 and the surface of the terminal box 25 is reduced, and the possibility that rainwater enters the abutting surface can be reduced. Even if rainwater or the like enters the abutting surface, such rainwater can be quickly discharged to the meat removal portion 51c. This action can prevent corrosion at the connecting and fixing portion between the power line fixing member 43 and the terminal box 25.
　また動力線側領域５１ｊおよび固定側領域５１ｋの少なくとも一箇所で、フランジ部４５が端子ボックス２５表面に接触することから。動力線固定部材４３のアース機能を得ることができる。 Further, the flange portion 45 comes into contact with the surface of the terminal box 25 in at least one place of the power line side region 51j and the fixed side region 51k. The ground function of the power line fixing member 43 can be obtained.
　以上、図面を参照して本発明の実施の形態を説明したが、本発明は、図示した実施の形態のものに限定されない。図示した実施の形態に対して、本発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変形を加えることが可能である。例えば上述した１の実施形態から一部の構成を抜き出し、上述した他の実施形態から他の一部の構成を抜き出し、これら抜き出された構成を組み合わせてもよい。 The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range. For example, a part of the configuration may be extracted from the above-described one embodiment, another part of the configuration may be extracted from the above-described other embodiments, and these extracted configurations may be combined.
　本発明は、電気自動車およびハイブリッド車両において有利に利用される。 The present invention is advantageously used in electric vehicles and hybrid vehicles.
　１０　インホイールモータ駆動装置、２１　モータ部、２３　ロータ、２４　ステータ、２５　端子ボックス、２６　導電棒、２９　モータケーシング、２９ｖ　モータケーシングカバー、３０　絶縁材、４１　動力線、４１ｃ　芯線、４１ｄ　被覆層、４２　金属端子、４３　動力線固定部材、４４　円筒部、４５　フランジ部、４５ｚ　フランジ部の舌部、４６，４７　ボルト、５１　端子ボックスの側壁、５１ｃ　肉抜き部、５１ｄ　肉抜き部の境界部分、５１ｅ　肉抜き部の動力線側部分、５１ｆ　肉抜き部の固定側部分、５１ｉ　端子ボックスの表面、５１ｊ　端子ボックス表面の動力線側領域、５１ｋ　端子ボックス表面の固定側領域、５２　端子ボックスの頂壁、Ｍ　端子ボックスの内部空間、Ｌ　モータケーシングの内部空間。 10 in-wheel motor drive device, 21 motor section, 23 rotor, 24 stator, 25 terminal box, 26 conductive rod, 29 motor casing, 29v motor casing cover, 30 insulation material, 41 power line, 41c core wire, 41d coating layer, 42 Metal terminal, 43 Power line fixing member, 44 Cylindrical part, 45 flange part, tongue part of 45z flange part, 46, 47 bolt, 51 side wall of terminal box, 51c cutout part, boundary part of 51d cutout part, 51e meat Power line side portion of the punched portion, 51f Fixed side portion of the thinned portion, 51i Surface of the terminal box, 51j Power line side region of the terminal box surface, 51k Fixed region of the terminal box surface, 52 Top wall of the terminal box, M Internal space of terminal box, inside L motor casing Between.

Claims (6)

  1. 　インホイールモータ駆動装置のケーシングに設けられた金属製の壁で区画される端子ボックスと、
    　前記インホイールモータ駆動装置の外部から延びて端部が前記端子ボックスに差し込まれ、前記インホイールモータ駆動装置に電力を供給する動力線と、
    　前記動力線の外周面に嵌合する筒部および前記筒部に設けられるフランジ部を有する金属製の動力線固定部材と、
    　前記フランジ部の一部分を前記端子ボックスに固定する固定手段と、を備え、
    　　前記フランジ部の端面は、前記固定手段に近く前記筒部から遠い固定側領域と、前記固定手段から遠く前記筒部に近く前記筒部を囲繞する動力線側領域と、前記固定側領域および前記動力線側領域を分断する境界領域を含み、
    　　前記固定側領域および前記動力線側領域は前記壁の表面に突き合わされ、
    　　前記境界領域は前記壁の表面から離隔される、インホイールモータ駆動装置と動力線の接続構造。     A terminal box defined by a metal wall provided in the casing of the in-wheel motor drive device;
    A power line extending from the outside of the in-wheel motor driving device and having an end inserted into the terminal box and supplying power to the in-wheel motor driving device,
    A metal power line fixing member having a cylinder part fitted to the outer peripheral surface of the power line and a flange part provided in the cylinder part;
    Fixing means for fixing a part of the flange portion to the terminal box,
    The end face of the flange portion is a fixed side region that is close to the fixing means and is far from the cylindrical portion, a power line side region that is far from the fixing means and close to the cylindrical portion, surrounds the cylindrical portion, the fixed side region, and the Including a boundary region that divides the power line side region,
    The fixed side region and the power line side region are butted against the surface of the wall,
    The boundary region is separated from the surface of the wall, and the connection structure between the in-wheel motor driving device and the power line.
  2. 　互いに突き合わされる前記フランジ部端面の前記動力線側領域と前記端子ボックスの前記表面の間に介在するシール材をさらに備える、請求項１に記載のインホイールモータ駆動装置と動力線の接続構造。 The in-wheel motor drive device and power line connection structure according to claim 1, further comprising a sealing material interposed between the power line side region of the end face of the flange portion butted against each other and the surface of the terminal box.
  3. 　前記シール材は硬化した液状ガスケットである、請求項２に記載のインホイールモータ駆動装置と動力線の接続構造。 The connection structure between an in-wheel motor drive device and a power line according to claim 2, wherein the seal material is a hardened liquid gasket.
  4. 　前記固定手段は、前記端子ボックスに形成されるねじ穴、前記フランジ部の一部分に形成される貫通孔、および前記貫通孔に通されて前記ねじ穴に螺合するボルトを有し、
    　前記ボルトは表面防錆処理を施される、請求項１～３のいずれかに記載のインホイールモータ駆動装置と動力線の接続構造。     The fixing means includes a screw hole formed in the terminal box, a through hole formed in a part of the flange portion, and a bolt that is passed through the through hole and screwed into the screw hole.
    The connection structure between an in-wheel motor drive device and a power line according to any one of claims 1 to 3, wherein the bolt is subjected to a surface rust prevention treatment.
  5. 　前記端子ボックスの前記壁と前記動力線固定部材は同じ材質である、請求項１～４のいずれかに記載のインホイールモータ駆動装置と動力線の接続構造。 The in-wheel motor drive device and power line connection structure according to any one of claims 1 to 4, wherein the wall of the terminal box and the power line fixing member are made of the same material.
  6. 　前記動力線固定部材の前記筒部は表面防錆処理を施される、請求項１～５のいずれかに記載のインホイールモータ駆動装置と動力線の接続構造。 The in-wheel motor drive device and power line connection structure according to any one of claims 1 to 5, wherein the cylindrical portion of the power line fixing member is subjected to a surface rust prevention treatment.
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JP2014193006A (en) * 2013-03-27 2014-10-06 Komatsu Ltd Rotary electric machine
JP2017013660A (en) * 2015-07-01 2017-01-19 日立オートモティブシステムズ株式会社 Motor and brake control device

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JP2002208456A (en) * 2001-01-11 2002-07-26 Auto Network Gijutsu Kenkyusho:Kk Method of connecting electric wire to shield case of equipment
JP2014193006A (en) * 2013-03-27 2014-10-06 Komatsu Ltd Rotary electric machine
JP2017013660A (en) * 2015-07-01 2017-01-19 日立オートモティブシステムズ株式会社 Motor and brake control device

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