WO2024171307A1 - 駆動装置 - Google Patents

駆動装置 Download PDF

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Publication number
WO2024171307A1
WO2024171307A1 PCT/JP2023/005019 JP2023005019W WO2024171307A1 WO 2024171307 A1 WO2024171307 A1 WO 2024171307A1 JP 2023005019 W JP2023005019 W JP 2023005019W WO 2024171307 A1 WO2024171307 A1 WO 2024171307A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear portion
carrier
planetary gear
wheel
drive device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2023/005019
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
孝亮 槻木
篤史 安藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
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 JTEKT Corp filed Critical JTEKT Corp
Priority to PCT/JP2023/005019 priority Critical patent/WO2024171307A1/ja
Priority to JP2025500471A priority patent/JPWO2024171307A1/ja
Priority to CN202380093307.8A priority patent/CN120659723A/zh
Priority to DE112023005786.9T priority patent/DE112023005786T5/de
Publication of WO2024171307A1 publication Critical patent/WO2024171307A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/08—General details of gearing of gearings with members having orbital motion
    • F16H57/082—Planet carriers
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • 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
    • 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
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • 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
    • B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F16H2055/176—Ring gears with inner teeth

Definitions

  • the present invention relates to a drive device that drives wheels.
  • the so-called in-wheel motor type has been proposed as a drive system for electric vehicles that use an electric motor as a drive source, in which the wheels are driven by a drive unit located inside the wheels.
  • Vehicles that use this type of drive system have high acceleration response because the drive source is close to the wheels, and can improve turning ability by independently controlling the drive force of the left and right wheels.
  • Patent Document 1 describes an in-wheel motor drive device in which a motor unit that generates a driving force, a reduction gear that reduces the rotation of the motor unit and outputs it, and a hub that transmits the output from the reduction gear to the drive wheel are all coaxially arranged along the rotation axis of the wheel.
  • the drive unit which is placed inside the wheel of the vehicle, is required to be small in size to avoid interference with the wheel and the suspension arms of the suspension system. Therefore, the object of the present invention is to provide a drive unit that can be made small.
  • the present invention provides a drive device that is attached to a mounting member having a mounting hole formed coaxially with the rotation axis of a wheel and drives the wheel, the drive device comprising an electric motor, a planetary gear mechanism that reduces the output rotation of the electric motor, and a hub unit that supports the wheel, the planetary gear mechanism and the hub unit being coaxially arranged in the axial direction along the rotation axis, the hub unit comprising an inner member having a hub flange to which the wheel is attached, an outer member that is fitted and fixed into the mounting hole, and a front part that is connected to the inner member.
  • the drive device has a plurality of rolling elements arranged between the outer member and the outer member, the outer member extending on the outer periphery of the planetary gear mechanism, the planetary gear mechanism has a plurality of planetary gears, a carrier supporting the plurality of planetary gears, an internal gear portion meshing with the plurality of planetary gears on the outer periphery side of the carrier, and a sun gear portion meshing with the plurality of planetary gears on the inner periphery side of the carrier, the carrier is connected to the inner member so as not to rotate relative to the inner member, and the internal gear portion is provided on the inner periphery of the outer member.
  • the present invention makes it possible to miniaturize the drive unit.
  • FIG. 1 is a perspective view showing a drive unit, a wheel, a mounting member, a brake disc, and a brake unit according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the drive device and its surroundings.
  • FIG. 3 is a partially enlarged view of FIG.
  • FIG. 4 is a perspective view showing a holding member and one support shaft member.
  • FIG. 5 is a perspective view showing the connecting member.
  • FIG. 6 is a cross-sectional view of the drive unit, in which a cross section of the planetary gear mechanism perpendicular to the axial direction is seen from the vehicle inner side toward the vehicle outer side.
  • FIG. 7 is a perspective cross-sectional view showing the outer member.
  • FIG. 1 is a perspective view showing a drive unit 1 according to an embodiment of the present invention, a wheel 91 driven by the drive unit 1, a mounting member 92 to which the drive unit 1 is attached, a brake disc 93 that rotates integrally with the wheel 91, and a brake unit 94.
  • the wheel 91 has a metal wheel 911 and a rubber tire 912 attached to the wheel 911.
  • the mounting member 92 is connected to the body of the vehicle via a suspension arm, a shock absorber, and a suspension spring.
  • the brake unit 94 generates a braking force by pressing brake pads against the brake disc 93.
  • Figure 2 is a cross-sectional view of the drive unit 1 and its surroundings.
  • Figure 3 is a partially enlarged view of Figure 2.
  • the rotation axis 90 of the wheel 91 is indicated by a dashed line.
  • the direction parallel to the rotation axis 90 is referred to as the axial direction
  • the direction perpendicular to the axial direction is referred to as the radial direction.
  • the side of the wheel 91 relative to the mounting member 92 is referred to as the vehicle outer side
  • the opposite side is referred to as the vehicle inner side.
  • the mounting member 92 is formed with a mounting hole 920 for mounting the drive unit 1.
  • the mounting hole 920 is a circular hole formed coaxially with the rotation axis 90, and penetrates the mounting member 92 in the axial direction.
  • the drive unit 1 is functionally configured to include an electric motor 10, a primary reduction mechanism 11 and a planetary gear mechanism 12 that reduce the speed of the output rotation of the electric motor 10, and a hub unit 13 that supports a wheel 91.
  • the planetary gear mechanism 12 and the hub unit 13 are arranged coaxially and aligned in the axial direction around the rotation axis 90.
  • the primary reduction mechanism 11 is provided between the electric motor 10 and the planetary gear mechanism 12.
  • the planetary gear mechanism 12 functions as a secondary reduction mechanism, and further reduces the speed of the output rotation of the electric motor 10 that has been reduced by the primary reduction mechanism 11, and transmits it to the hub unit 13.
  • the main components of the drive unit 1 include a pinion gear 21 attached to the output shaft 101 of the electric motor 10, a reduction rotation member 22 that rotates around the rotation axis 90, a cover 23 that covers the reduction rotation member 22, a number of planetary gears 3, a carrier 4 that supports the number of planetary gears 3, an inner member 5 that rotates integrally with the carrier 4, an outer member 6 that is fitted and fixed in the mounting hole 920, a number of rolling elements 7 that are arranged between the inner member 5 and the outer member 6, and an end bearing 80 that is arranged at the end of the outer member 6 on the vehicle inner side and that rotatably supports the carrier 4 relative to the outer member 6.
  • the cover 23 is fixed to the mounting member 92 by a number of bolts 81.
  • One of these bolts 81 is shown in FIG. 2.
  • the electric motor 10 is, for example, an embedded magnet synchronous motor or a surface magnet synchronous motor, and is fixed to the cover 23 by a number of bolts 82.
  • the rotation axis 100 of the electric motor 10 is parallel to the rotation axis 90 and is offset from the rotation axis 90. In this embodiment, when the drive unit 1 is mounted on the vehicle, the rotation axis 100 of the electric motor 10 is offset vertically downward from the rotation axis 90.
  • the primary reduction mechanism 11 is composed of a pinion gear 21 and a part of the reduction rotation member 22.
  • the planetary gear mechanism 12 is composed of a carrier 4, a plurality of planetary gears 3, a portion of each of the reduction rotation member 22 and the outer member 6.
  • the hub unit 13 is composed of an inner member 5, a plurality of rolling elements 7, and a portion of the outer member 6.
  • the pinion gear 21 is attached to the output shaft 101 of the electric motor 10 so as to be non-rotatable relative to the electric motor 10, and is rotatably supported by a bearing 83 held by the cover 23 and a bearing 84 held by the mounting member 92.
  • the pinion gear 21 has a small diameter gear portion 21a made of a spur gear between the bearing 83 and the bearing 84. In FIG. 2, the pitch circle diameter P1 of the small diameter gear portion 21a is shown.
  • the reduction rotation member 22 integrally comprises a disk-shaped disk portion 221 centered on the rotation axis 90, an outer peripheral cylindrical portion 222 extending axially from the outer peripheral end of the disk portion 221 toward the vehicle inner side, and a shaft portion 223 extending axially from the center of the disk portion 221 toward the vehicle outer side.
  • the outer peripheral cylindrical portion 222 is supported by the cover 23 by a bearing 85 arranged inside it.
  • the outer peripheral cylindrical portion 222 is formed with a large diameter gear portion 222a that meshes with the small diameter gear portion 21a of the pinion gear 21.
  • a sun gear portion 223a that constitutes part of the planetary gear mechanism 12 is formed on the outer periphery of the shaft portion 223.
  • the sun gear portion 223a rotates integrally with the large diameter gear portion 222a.
  • the large diameter gear portion 222a of the reduction rotation member 22 is a spur gear whose teeth are parallel to the axial direction, similar to the small diameter gear portion 21a of the pinion gear 21.
  • the pitch circle diameter P2 of the large diameter gear portion 222a is formed to be larger than the pitch circle diameter P1 of the small diameter gear portion 21a.
  • the primary reduction mechanism 11 is configured by meshing the small diameter gear portion 21a of the pinion gear 21 with the large diameter gear portion 222a of the reduction rotation member 22, and the reduction rotation member 22 rotates at a lower speed and with a higher torque than the output shaft 101 of the electric motor 10.
  • the shaft portion 223 of the reduction rotation member 22 is disposed at the center of the carrier 4.
  • the sun gear portion 223a is formed of helical teeth whose teeth are inclined with respect to the axial direction, and meshes with the plurality of planetary gears 3.
  • the pitch circle diameter P3 of the sun gear portion 223a is formed smaller than the pitch circle diameter P2 of the large diameter gear portion 222a.
  • the carrier 4 is configured to include a holding member 41 having a plurality of holding portions 40 formed therein for holding the plurality of planetary gears 3, a connecting member 42 for preventing the planetary gears 3 from slipping out of the holding portions 40 and for connecting the holding member 41 and the inner member 5, a plurality of support shaft members 43 disposed between the holding member 41 and the connecting member 42 for supporting the plurality of planetary gears 3, and a plurality of bolts 44 for fixing the holding member 41 and the connecting member 42.
  • Figure 4 is a perspective view showing the retaining member 41 and one support shaft member 43.
  • Figure 5 is a perspective view showing the connecting member 42.
  • Figure 6 is a cross-sectional view of the drive unit 1, showing a cross section of the planetary gear mechanism 12 perpendicular to the axial direction, viewed from the vehicle inner side toward the vehicle outer side.
  • Figure 7 is a perspective cross-sectional view showing the outer member 6.
  • the retaining member 41 integrally comprises a disk-shaped base 411 centered on the rotation axis 90, a flange portion 412 provided at the end of the base 411 on the vehicle inner side, and a plurality of leg shaft portions 413 formed extending in the axial direction so as to protrude from the base 411 to the vehicle outer side.
  • a through hole 411a is formed in the center of the base 411, into which the shaft portion 223 of the reduction rotation member 22 is inserted.
  • the flange portion 412 is formed in an annular shape, protruding radially from the outer circumferential surface 411b of the base 411.
  • the leg shafts 413 are provided at equal intervals in the circumferential direction around the rotation axis 90, and a retaining portion 40 is formed between the leg shafts 413.
  • the planetary gear mechanism 12 has three planetary gears 3, and three leg shafts 413 are provided on the retaining member 41.
  • a bolt insertion hole 413a is formed in each leg shaft 413 for inserting a bolt 44.
  • the bolt 44 has a cylindrical insertion portion 441 that is inserted into the bolt insertion hole 413a, a head portion 442 that is larger in diameter than the insertion portion 441, and a male thread portion 443 that screws into the connecting member 42.
  • the support shaft member 43 has a large diameter portion 431 that is inserted into the center of the planetary gear 3, and a pair of small diameter portions 432, 433 provided at both ends of the large diameter portion 431.
  • the base portion 411 of the holding member 41 is formed with a fitting hole 411c into which the small diameter portion 432 on the vehicle inner side of the pair of small diameter portions 432, 433 of the support shaft member 43 fits.
  • the small diameter portion 433 on the vehicle outer side fits into a fitting hole 421a of the connecting member 42 described next.
  • the connecting member 42 integrally comprises a disk-shaped cap portion 421 that closes the openings on the vehicle outer side of the multiple holding portions 40 to prevent the multiple planetary gears 3 from coming loose, a spline shaft portion 422 that extends from the center of the cap portion 421 to the vehicle outer side, and a male thread portion 423 provided at the end on the vehicle outer side.
  • a recess 420 is formed in the center of the cap portion 421, recessed in the axial direction toward the vehicle outer side.
  • the recess 420 houses a bearing 86 that supports the shaft portion 223 of the reduction rotation member 22, as shown in FIG. 2.
  • the cap portion 421 is formed with a plurality of fitting holes 421a into which the small diameter portion 433 on the vehicle outer side of the support shaft member 43 fits, and a plurality of screw holes 421b into which the male thread portion 443 of the bolt 44 screws.
  • the plurality of fitting holes 421a and the plurality of screw holes 421b are arranged alternately along the circumferential direction of the cap portion 421.
  • the tip surface 413b of the leg shaft portion 413 abuts against the cap portion 421 of the connecting member 42 by the axial force of the bolt 44.
  • a plurality of spline teeth 422a extending in the axial direction are formed on the outer periphery of the spline shaft portion 422.
  • the spline shaft portion 422 is inserted into the center of the inner member 5.
  • the planetary gear 3 is supported on the outer periphery of the large diameter portion 431 of the support shaft member 43 via a bearing 87.
  • the bearing 87 is a needle roller bearing, and has a number of needle rollers 871 and a retainer 872 that holds the number of needle rollers 871.
  • two bearings 87 are disposed between the large diameter portion 431 of the support shaft member 43 and the planetary gear 3.
  • the outer member 6 extends around the outer periphery of the planetary gear mechanism 12.
  • An internal gear portion 63 that meshes with the multiple planetary gears 3 is provided on the inner periphery of the outer member 6.
  • the planetary gear mechanism 12 is configured to include multiple planetary gears 3, a carrier 4, an internal gear portion 63 that meshes with the multiple planetary gears 3 on the outer periphery of the carrier 4, and a sun gear portion 223a of a reduction rotation member 22 that meshes with the multiple planetary gears 3 on the inner periphery of the carrier 4.
  • the configuration of the outer member 6 will be described in detail later.
  • the inner member 5 is composed of a hub wheel 51 having a fitting hole 50 formed in the center into which the splined shaft portion 422 of the connecting member 42 is spline-fitted, and an inner ring 52 fitted onto the end of the hub wheel 51 on the vehicle inner side.
  • a nut 88 is screwed onto the male threaded portion 423 of the connecting member 42 that protrudes from the fitting hole 50 to the vehicle outer side.
  • the carrier 4 is connected to the inner member 5 so that it cannot rotate relative to the inner member 5 by spline-fitting the splined shaft portion 422 of the connecting member 42 into the fitting hole 50.
  • the inner ring 52 is prevented from coming off the hub wheel 51 by the cap portion 421 of the connecting member 42 abutting against it.
  • the inner ring 52 may also be prevented from coming off by crimping the end of the hub wheel 51 on the vehicle inner side.
  • the rolling elements 7 are arranged in a double row between the inner member 5 and the outer member 6. More specifically, the rolling elements 7 form a first rolling element row 71 on the wheel 91 side and a second rolling element row 72 on the planetary gear mechanism 12 side.
  • the rolling elements 7 of the first rolling element row 71 are held by a first retainer 701 and roll on a first inner raceway surface 51a formed on the hub wheel 51.
  • the rolling elements 7 of the second rolling element row 72 are held by a second retainer 702 and roll on a second inner raceway surface 52a formed on the inner ring 52.
  • the rolling elements 7 are spherical, but this is not limiting and the rolling elements 7 may be tapered rollers.
  • the inner member 5 has a hub flange 501 to which the wheel 911 of the wheel 91 is attached, and a hub cylindrical portion 502 that is located on the inside of the first rolling element row 71 and the second rolling element row 72.
  • the hub flange 501 is part of the hub wheel 51.
  • the hub cylindrical portion 502 is formed by a part of the hub wheel 51 and the inner ring 52.
  • the first inner raceway surface 51a and the second inner raceway surface 52a are formed on the outer periphery of the hub cylindrical portion 502.
  • a hub bolt 95 for attaching the brake disc 93 and the wheel 911 of the wheel 91 is fixed to the hub flange 501.
  • the hub bolt 95 is press-fitted into a bolt hole 501a formed in the hub flange 501, and a hub nut 96 is screwed into the tip of the hub bolt.
  • a female threaded hole may be formed in the hub flange 501, and the hub bolt may be screwed into this female threaded hole.
  • the outer member 6 has a cylindrical portion 61 that fits into the mounting hole 920 of the mounting member 92, a flange portion 62 that is fixed to the open end surface 920a of the mounting hole 920 in the mounting member 92, and an internal gear portion 63 provided inside the cylindrical portion 61.
  • the cylindrical portion 61, the flange portion 62, and the internal gear portion 63 are integrally formed.
  • the cylindrical portion 61 and the internal gear portion 63 may be separate bodies and connected to each other by, for example, spline fitting so that they cannot rotate relative to each other.
  • the internal gear portion 63 may be provided integrally with the cylindrical portion 61 inside the cylindrical portion 61, or may be arranged inside the cylindrical portion 61 so as to rotate integrally with the cylindrical portion 61.
  • the cylindrical portion 61 is formed with an outer diameter slightly smaller than the inner diameter of the mounting hole 920, and is inserted into the mounting hole 920 from the vehicle outer side toward the vehicle inner side.
  • the cylindrical portion 61 has a first portion 611 that is on the outside of the hub cylindrical portion 502 of the inner member 5, and a second portion 612 that is closer to the vehicle inner side than the first portion 611.
  • a seal member 89 is disposed between the end of the first portion 611 on the vehicle outer side and the hub wheel 51.
  • a portion of the first portion 611 in the axial direction is accommodated in the mounting hole 920.
  • the second portion 612 is entirely accommodated in the mounting hole 920, and is disposed on the outer periphery of the retaining member 41 and the cap portion 421 of the connecting member 42.
  • the hub unit 13 is composed of the inner member 5, the flange portion 62 of the outer member 6, the first portion 611 of the cylindrical portion 61, a plurality of rolling elements 7, a first retainer 701, a second retainer 702, and a seal member 89.
  • the first portion 611 of the cylindrical portion 61 is formed with a first outer raceway surface 611a on which the plurality of rolling elements 7 of the first rolling element row 71 roll, and a second outer raceway surface 611b on which the plurality of rolling elements 7 of the second rolling element row 72 roll.
  • the flange portion 62 is composed of a plurality of flange pieces 621, which are arranged radially so as to protrude outward from the first portion 611 of the cylindrical portion 61.
  • the flange portion 62 may be arranged in an annular shape on the outer periphery of the cylindrical portion 61.
  • the mounting member 92 has a threaded hole 92b formed at an opening end surface 920a into which a bolt 97 for fixing the flange portion 62 is screwed.
  • the opening end surface 920a is the end surface of the mounting member 92 on the vehicle outer side around the opening of the mounting hole 920.
  • Each flange piece 621 has a bolt insertion hole 62a formed at a position corresponding to the threaded hole 92b.
  • the outer member 6 is fixed to the mounting member 92 by the bolt 97 inserted into the bolt insertion hole 62a and screwing into the threaded hole 92b.
  • the internal gear portion 63 is formed with a plurality of helical teeth 63a whose teeth are inclined relative to the axial direction.
  • the internal gear portion 63 is meshed with the helical teeth 3a of the plurality of planetary gears 3.
  • the end portion of the second portion 612 of the cylindrical portion 61 on the vehicle inner side is formed with a bearing fitting portion 612a into which the end bearing 80 is fitted.
  • the end bearing 80 is a ball bearing, and as shown in FIG. 3, has an outer ring 801, an inner ring 802, and multiple rolling elements 803 arranged between the outer ring 801 and the inner ring 802.
  • the outer ring 801 is held in the bearing fitting portion 612a of the outer member 6, and the side surface 801a on the vehicle outer side abuts against the end surface 63b on the vehicle inner side of the internal gear portion 63.
  • the inner ring 802 is arranged on the outer periphery of the base portion 411 of the retaining member 41, and the side surface 802a on the vehicle inner side of the inner ring 802 faces the flange portion 412 of the retaining member 41.
  • the end bearing 80 is disposed at a position farther from the hub unit 13 than the internal gear portion 63 in the axial direction of the drive unit 1, and the internal gear portion 63 is provided between the end bearing 80 and the second rolling element row 72 on the planetary gear mechanism 12 side of the first rolling element row 71 and the second rolling element row 72.
  • the carrier 4 and the inner member 5 are rotatably supported with respect to the outer member 6 at multiple positions spaced apart in the axial direction, the tilt of the carrier 4 and the inner member 5 with respect to the outer member 6 can be suppressed. This makes it possible to maintain good meshing between the internal gear portion 63 and the planetary gear 3.
  • the internal gear portion 63 that meshes with the multiple planetary gears 3 is provided on the inner periphery of the outer member 6 that is fitted and fixed into the mounting hole 920 of the mounting member 92, thereby making it possible to reduce the size of the drive unit 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Retarders (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
PCT/JP2023/005019 2023-02-14 2023-02-14 駆動装置 Ceased WO2024171307A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2023/005019 WO2024171307A1 (ja) 2023-02-14 2023-02-14 駆動装置
JP2025500471A JPWO2024171307A1 (https=) 2023-02-14 2023-02-14
CN202380093307.8A CN120659723A (zh) 2023-02-14 2023-02-14 驱动装置
DE112023005786.9T DE112023005786T5 (de) 2023-02-14 2023-02-14 Antriebsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/005019 WO2024171307A1 (ja) 2023-02-14 2023-02-14 駆動装置

Publications (1)

Publication Number Publication Date
WO2024171307A1 true WO2024171307A1 (ja) 2024-08-22

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PCT/JP2023/005019 Ceased WO2024171307A1 (ja) 2023-02-14 2023-02-14 駆動装置

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JP (1) JPWO2024171307A1 (https=)
CN (1) CN120659723A (https=)
DE (1) DE112023005786T5 (https=)
WO (1) WO2024171307A1 (https=)

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Publication number Priority date Publication date Assignee Title
JP2005186667A (ja) * 2003-12-24 2005-07-14 Ntn Corp 電動式車輪駆動装置
JP2009257472A (ja) * 2008-04-16 2009-11-05 Nissan Motor Co Ltd 電動ユニット
JP2011207375A (ja) * 2010-03-30 2011-10-20 Ntn Corp インホイール型モータ内蔵車輪用軸受装置
JP2015218865A (ja) * 2014-05-20 2015-12-07 日産自動車株式会社 電動駆動装置
JP2021154763A (ja) * 2020-03-25 2021-10-07 Ntn株式会社 インホイールモータ駆動装置

Patent Citations (5)

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JP2009257472A (ja) * 2008-04-16 2009-11-05 Nissan Motor Co Ltd 電動ユニット
JP2011207375A (ja) * 2010-03-30 2011-10-20 Ntn Corp インホイール型モータ内蔵車輪用軸受装置
JP2015218865A (ja) * 2014-05-20 2015-12-07 日産自動車株式会社 電動駆動装置
JP2021154763A (ja) * 2020-03-25 2021-10-07 Ntn株式会社 インホイールモータ駆動装置

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