WO2021095674A1 - Dispositif d'entraînement de moteur-roue - Google Patents

Dispositif d'entraînement de moteur-roue Download PDF

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Publication number
WO2021095674A1
WO2021095674A1 PCT/JP2020/041679 JP2020041679W WO2021095674A1 WO 2021095674 A1 WO2021095674 A1 WO 2021095674A1 JP 2020041679 W JP2020041679 W JP 2020041679W WO 2021095674 A1 WO2021095674 A1 WO 2021095674A1
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WO
WIPO (PCT)
Prior art keywords
casing
holding plate
drive device
stator
motor drive
Prior art date
Application number
PCT/JP2020/041679
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English (en)
Japanese (ja)
Inventor
真也 太向
四郎 田村
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 WO2021095674A1 publication Critical patent/WO2021095674A1/fr

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • 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.
  • the in-wheel motor is known to have a direct method in which the rotational driving force of the motor is directly transmitted to the wheels and a reduction gear combined method in which the rotational driving force of the motor is decelerated by the reduction gear and transmitted to the wheels.
  • an angle sensor for detecting the rotation angle of the motor is further provided.
  • a resolver having excellent resistance to changes in the environment as compared with other sensors is preferably used because of its simple structure.
  • the stator of the resolver is fitted to a bracket constituting the housing case of the motor and fastened and fixed in the axial direction with bolts. Things are known.
  • the resolver stator portion is axially sandwiched between the motor housing (resolver stator portion side mounting portion) and the cover member, and an elastic ring is interposed between the housing and the resolver. It is known that the resolver stator portion is fixed to the housing by tightening and fixing the cover member to the housing with bolts in this state.
  • the resolver is accurately positioned and fixed while avoiding interference between the in-wheel motor drive device and peripheral parts, and excellent detection by the resolver is performed by maintaining this position accuracy. Making it possible to continuously demonstrate performance is a technical issue to be solved.
  • this drive device includes a motor unit that drives the wheels, a wheel bearing unit that rotationally supports the wheels, a resolver that detects the rotation angle of the motor unit, and at least a casing that accommodates the motor unit.
  • An in-wheel motor drive device having a rotor attached to a rotating shaft of a motor unit and a stator attached to a casing, further provided with a holding plate that holds the stator between the casing in the axial direction, and the holding plate is a circle thereof.
  • the in-wheel motor drive device is provided with a holding plate that presses the stator of the resolver in the axial direction between the resolver and the casing, and the holding plate holds the stator at a plurality of positions in the circumferential direction in the axial direction.
  • a plurality of claws to be pressed down and a bolt fixing portion are integrally provided at different positions in the circumferential direction from the claws.
  • the claw portion (or the portion extending from the bolt fixing portion to the claw portion) can be elastically deformed in the axial direction relatively easily. Therefore, as described in Patent Document 2, an elastic ring is formed between the stator and the casing.
  • the stator can be positioned and fixed in the axial direction by absorbing variations in the axial dimensions of the stator, in other words, elastically adjusting the holding position of the stator end surface by the claws without interposing.
  • it is a holding plate it is possible to form a holding plate including a portion that is elastically deformed by a material resistant to vibration such as metal, so that in an environment where vibration peculiar to an in-wheel motor drive device such as unsprung vibration acts.
  • excellent positioning accuracy can be maintained. Therefore, it is possible to continuously and stably exhibit the excellent detection performance of the resolver.
  • the bolt fixing portion can be arranged in the radial direction without interfering with the claw portion. it can.
  • This makes it possible to prevent the outer diameter of the holding plate from increasing, and to prevent the casing and thus the in-wheel motor drive device from becoming larger. Therefore, the resolver can be positioned with high accuracy while avoiding interference between the in-wheel motor drive device and peripheral parts.
  • the stator since the stator can be sandwiched and fixed by bolts, it is not necessary to extend the casing to the outer diameter side in order to provide the fitting and fixing surface as in Patent Document 1. Therefore, this also makes it possible to prevent the casing and thus the in-wheel motor drive device from becoming large in size, and to avoid interference with peripheral parts.
  • a bolt fixing portion may be provided between adjacent claw portions in the circumferential direction of the holding plate.
  • the elastic restoring force can be effectively applied to a plurality of claws with a minimum number of bolt fixing portions. Can be granted. Therefore, according to the above configuration, it is possible to exhibit good positioning performance while further reducing the size of the entire holding plate.
  • the claws may be provided at three or more locations in the circumferential direction of the holding plate.
  • the stator can be reliably pressed in the axial direction without tilting. Therefore, it is possible to stably obtain excellent positioning accuracy.
  • the claw portion and the bolt fixing portion are connected to each other in the circumferential direction of the holding plate via the arm portion, and the arm portion bulges outward in the radial direction of the holding plate. It may have a curved shape as described above.
  • the claw portion and the bolt fixing portion are connected via the arm portion, and the arm portion is curved so as to bulge outward in the radial direction of the holding plate, thereby preventing unnecessary interference with the stator. While avoiding it, it is possible to secure a substantially required distance (distance required for the required elastic deformation) between the claw portion and the bolt fixing portion. Therefore, according to the above configuration, a large elastic deformation can be generated in the arm portion without applying an excessive tightening force, so that it is possible to avoid an increase in the size of the holding plate and easily vary the axial dimensions of the stator. It becomes possible to correspond. In addition, it is possible to obtain sufficient elastic deformation while ensuring the required strength of the holding plate.
  • the portion of the outer peripheral edge of the pressing plate located on the outer peripheral edge of the claw portion may be retracted inward in the radial direction of the pressing plate.
  • the inboard side of the motor portion of the casing accommodating the motor portion is opened, and the rotor of the resolver is attached to the rotating shaft of the motor portion from this opening to attach the stator. Attach to the casing. Then, after the assembly of the resolver is completed, the opening of the casing is closed with a predetermined cover member, and the cover member is fixed to the casing with a bolt or the like.
  • the cover member is fixed to the casing with bolts in this way, the insertion space for the bolts is more radial outside than the outer peripheral edge of the resolver stator (diameter than the outer peripheral edge of the holding plate) in order to avoid interference with the holding plate.
  • the portion of the outer peripheral edge of the pressing plate located on the outer periphery of the claw portion has a shape retracted inward in the radial direction of the pressing plate, so that the retracted portion, that is, the outermost diameter of the pressing plate A bolt insertion space can be provided at a position radially inside the portion. Therefore, while both the holding plate and the cover member can be fixed to the casing by bolting, it is possible to prevent the diameter of the cover member and the casing from increasing.
  • the holding plate may be made of spring steel.
  • any material can be applied to the holding plate as long as it causes the required elastic deformation when it is fixed to the casing with bolts.
  • a steel material is preferable, and among them, a spring steel is preferable. .. Since spring steel has a feature that the elastic range is wider than that of other steel materials, it is possible to relatively easily exert the elastic deformation required for the holding plate while maintaining the strength as the holding plate.
  • the resolver is accurately positioned and fixed while avoiding interference between the in-wheel motor drive device and peripheral parts, and excellent detection by the resolver is achieved by maintaining this position accuracy. It is possible to continuously demonstrate the performance.
  • the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
  • the side far from the center of the vehicle in the axle direction of the vehicle is referred to as the outboard side
  • the side close to the center of the vehicle is referred to as the inboard side.
  • FIG. 1 is a vertical cross-sectional view of the in-wheel motor drive device 21 as seen by the line QQ of FIG. 2, and FIG. 2 is one of the in-wheel motor drive devices 21 as seen by the line RR of FIG. It is a front view including a partial cross section.
  • the in-wheel motor drive device 21 is arranged inside, for example, a wheel housing 11 (see FIG. 2) that constitutes a drive wheel (wheel) of an electric vehicle, and has a role of transmitting a driving force to the drive wheel. Is responsible for.
  • the in-wheel motor driving device 21 has a motor unit A that generates a rotational driving force and a speed reducer unit that decelerates and outputs the rotational driving force input by the motor unit A.
  • B a bearing portion C for wheels that transmits the output from the speed reducer portion B to the drive wheels, a resolver D that detects the rotation angle of the motor portion A, and a casing 22 that houses at least the motor portion A and the resolver D.
  • the motor unit A, the speed reducer unit B, and the resolver D are housed in the casing 22.
  • the casing 22 has a divided (two-divided or three-divided or more) structure in consideration of the assembling property of the parts.
  • each divided casing is referred to as a first divided casing 22a, a second divided casing 22b, and a third divided casing 22c in this order from the inboard side to the outboard side.
  • the first divided casing 22a located on the most inboard side has an opening on the inboard side, and the opening 22a1 is closed by the cover member 22d.
  • the cover member 22d is attached to the first divided casing 22a by fixing the cover member 22d to the first divided casing 22a with one or more bolts 23.
  • the motor unit A includes a motor stator 24 fixed to a casing 22, a motor rotor 25 arranged so as to face each other on the inner side in the radial direction of the motor stator 24 with a predetermined gap, and a motor rotor 25.
  • a radial gap type motor 27 having a motor rotating shaft 26 arranged inside in the radial direction of the motor rotor 25 and rotating integrally with the motor rotor 25 is provided.
  • the motor 27 can rotate at high speed at, for example, several thousand to several tens of thousands of revolutions per minute.
  • the motor stator 24 is configured by winding a coil 24b around a magnetic core 24a, and the motor rotor 25 is composed of a permanent magnet or the like.
  • the outboard side (left side in FIG. 1) of the motor rotating shaft 26 is rotatably supported by the bearing 28, and the inboard side (right side in FIG. 1) is rotatably supported by the bearing 29 with respect to the casing 22.
  • the pair of bearings 28 and 29 together with the motor 27 constitute the motor unit A.
  • the speed reducer unit B includes an input gear 30, a large-diameter intermediate gear 31, a small-diameter intermediate gear 32, an output gear 33, an input shaft 34, an intermediate shaft 35, and an output shaft 36.
  • the input gear 30 is integrally formed with the hollow input shaft 34
  • the input shaft 34 is spline-fitted (including serration fitting; the same applies hereinafter) to the outboard side end of the motor rotating shaft 26. It is coaxially connected to 26a.
  • the motor rotation shaft 26 and the input shaft 34 rotate around a common rotation center O1.
  • the large-diameter intermediate gear 31 and the small-diameter intermediate gear 32 are integrally formed with the intermediate shaft 35.
  • the large-diameter intermediate gear 31 and the small-diameter intermediate gear 32 rotate around a common center of rotation O2.
  • the output gear 33 is formed integrally with the output shaft 36, and rotates around the rotation center O3 which is the central axis of the output shaft 36.
  • the input shaft 34, the intermediate shaft 35, and the output shaft 36 which are all gear shafts, are arranged in parallel with each other.
  • the input shaft 34 is supported by a pair of bearings 37 and 38
  • the intermediate shaft 35 is supported by a pair of bearings 39 and 40
  • the output shaft 36 is rotated by the pair of bearings 41 and 42 with respect to the casing 22, respectively. It is freely supported.
  • the input gear 30 and the large-diameter intermediate gear 31 mesh with each other, and the small-diameter intermediate gear 32 coaxial with the large-diameter intermediate gear 31 and the output gear 33 mesh with each other. ..
  • the number of teeth of the large-diameter intermediate gear 31 is larger than the number of teeth of either the input gear 30 or the small-diameter intermediate gear 32, and the number of teeth of the output gear 33 is larger than the number of teeth of the small-diameter intermediate gear 32. It is set.
  • the speed reducer unit B has a reduction structure for reducing the rotational kinetic force input from the motor rotation shaft 26 in two stages, and has an input gear 30 and an output gear 33, a large diameter intermediate gear 31 and a small diameter intermediate gear.
  • Reference numeral 32 denotes a power transmission path from the input shaft 34 to the output shaft 36.
  • the rotation center of the intermediate shaft 35 is between the rotation center O1 of the input shaft 34 of the speed reducer unit B and the rotation center O3 of the output shaft 36 forming the axle of the wheel bearing portion C.
  • O2 is arranged so as to form a bent shape.
  • gears can be applied as the input gear 30, the intermediate gears 31 and 32, and the output gear 33 constituting the speed reducer unit B.
  • a helical gear is used.
  • Helical gears are effective in that the number of teeth that mesh with each other increases at the same time and the tooth contact is dispersed, so that the sound is quiet and the torque fluctuation is small.
  • the module of each gear can be set arbitrarily in consideration of the meshing ratio of the gears and the limit rotation speed, but when considering the meshing ratio of the gears and the limit rotation speed, for example, it is about 1 to 3. It is possible to set.
  • the wheel bearing portion C is composed of an inner ring rotation type wheel bearing 43 (see FIG. 1).
  • the wheel bearing 43 includes a pair of bearing inner rings 44, 45 arranged on the outer periphery of the output shaft 36 as an axle, a bearing outer ring 46 arranged on the outer periphery of the bearing inner rings 44, 45, and a bearing inner ring 44, A double-row inner race 47 formed on the outer peripheral surface of the 45, a double-row outer race 48 formed on the inner peripheral surface of the bearing outer ring 46, and a plurality of rolling elements arranged between the inner race 47 and the outer race 48.
  • This is a double-row angular contact ball bearing including a ball 49 as a bearing and a cage (not shown) for holding each ball 49.
  • the bearing outer ring 46 is provided with a flange portion 50 extending outward in the radial direction, and the flange portion 50 is connected to the hub attachment 12 of the suspension connecting member by a bolt 51.
  • the hub attachment 12 is connected to the casing 22 (here, the third divided casing 22c on the outboard side) with a bolt 52 at a position different in the circumferential direction or a different position in the radial direction from the connection position with the flange portion 50, for example. Has been done. As a result, the hub attachment 12 is fixed to the in-wheel motor drive device 21.
  • the bearing inner ring 44 on the outboard side is fixed to the outer circumference of the output shaft 36 as an axle by spline fitting.
  • the bearing inner ring 44 is provided with a flange portion 53 extending outward in the radial direction.
  • the flange portion 53 is a flange for mounting wheels.
  • the brake disc 13 and the wheel 14 of the drive wheel are mounted by the hub bolt 54. .. From the above configuration, the rotational driving force from the motor unit A is transmitted to the drive wheels in a state of being decelerated via the speed reducer unit B.
  • lubricating oil is supplied to each part by an oil pump (for example, a rotary type) (not shown) for cooling the motor part A and lubricating and cooling the speed reducer part B.
  • the inside of the wheel bearing 43 is lubricated with grease.
  • the resolver D is for detecting the rotation angle of the motor 27, and is arranged on the inboard side of the motor 27 as shown in FIG. Specifically, the resolver D includes a resolver rotor 55 attached to the inboard side end portion 26b of the motor rotating shaft 26, and a resolver stator 56 attached to the first partition casing 22a.
  • the resolver rotor 55 is fixed to the outer periphery of the inboard side end portion 26b of the motor rotating shaft 26 by a predetermined means (for example, press-fitting), whereby the resolver rotor 55 can rotate integrally with the motor rotating shaft 26.
  • the resolver stator 56 has an annular shape as a whole, and is formed by laminating, for example, a plurality of disc-shaped steel plates in the thickness direction thereof.
  • One or more coils 57 are wound around the resolver stator 56 (see FIG. 1 for each).
  • the resolver stator 56 is in contact with the stepped portion 22e provided on the inner circumference of the first divided casing 22a. Therefore, in this state, the pressing plate 58 is applied to the resolver stator 56 from the opposite side of the stepped portion 22e, and the bolt 59 is tightened so that the resolver stator 56 is sandwiched between the stepped portion 22e and the pressing plate 58 with axial positioning. Can be fixed.
  • the pressing plate 58 integrates a plurality of claw portions 60 extending inward in the radial direction and a bolt fixing portion 61 for fixing the pressing plate 58 to the first divided casing 22a by bolts 59.
  • the bolt fixing portion 61 is formed with an insertion hole 62 through which the bolt 59 can be inserted (see FIG. 4), and the positions of the fastening hole 22g and the insertion hole 62 provided in the first divided casing 22a.
  • the claw portion 60 and the bolt fixing portion 61 are provided at different positions in the circumferential direction. Further, the claw portion 60 overlaps with the resolver stator 56 in the radial direction and is located radially outside the outer peripheral edge of the coil 57 (separate in the radial direction). On the other hand, the bolt fixing portion 61 is located radially outside the outer peripheral edge of the resolver stator 56. Therefore, in a state where the pressing plate 58 is pressed against the resolver stator 56 by tightening the bolt 59, only the claw portion 60 comes into contact with the resolver stator 56, and the remaining portion of the pressing plate 58 including the bolt fixing portion 61 interferes with the resolver stator 56. Does not occur.
  • both the claw portion 60 and the bolt fixing portion 61 are formed as a part of the holding plate 58.
  • the claw portion 60 and the bolt fixing portion 61 are connected to each other by an arm portion 63 extending in the circumferential direction of the holding plate 58.
  • the axial position of the seat surface 61a of the bolt fixing portion 61 (the surface on the side that comes into contact with the first divided casing 22a) is P1
  • the seat surface 60a of the claw portion 60 (resolver stator 56).
  • the seat surface 60a of the claw portion 60 and the seat surface 61a of the bolt fixing portion 61 may or may not be on the same plane in a state where the pressing plate 58 is not deformed at all.
  • the axle direction position P2 of the seat surface 60a of the claw portion 60 with respect to the axle direction position P1 of the seat surface 61a of the bolt fixing portion 61 is inboard as compared with the state before fixing by the bolt 59. It is important to set the axle direction positions P1 and P2 of the seat surfaces 60a and 61a so as to move reliably to the side.
  • the resolver stator 56 is often formed by laminating a plurality of steel plates in the thickness direction thereof, so that the axial dimensional variation tends to be large (the dimensional tolerance tends to be large). Therefore, for example, even when the actual axial dimension is the lower limit of the tolerance, the pressing plate 58 (arm portion 63) is elastically deformed, and the resolver stator 56 can be reliably pressed in the axial direction by the claw portion 60. As described above, it is desirable to set the axle direction positions P1 and P2 of the seat surfaces 60a and 61a.
  • the arrangement and number of the claws 60 and the bolt fixing portions 61 are arbitrary, but in the present embodiment, the bolt fixing portions 61 are arranged between the claws 60 adjacent to each other in the circumferential direction of the holding plate 58.
  • the claw portions 60 are provided at three locations in the circumferential direction of the pressing plate 58 (that is, the number of the claw portions 60 is three).
  • the holding plate 58 has a shape (C shape) in which a part of the holding plate 58 is missing in the circumferential direction, the three claw portions 60 and the two bolt fixing portions 61 are different from each other in the circumferential direction. It is arranged at the position.
  • the arm portion 63 connecting the claw portion 60 and the bolt fixing portion 61 has a curved shape so as to bulge outward in the radial direction of the holding plate 58 (see FIG. 3).
  • the length of the arm portion 63 can be increased as much as possible without increasing the width direction dimension of the arm portion 63, so that the arm portion 63 can be further elastically deformed.
  • the arm portion 63 is curved so as to bulge toward the outer diameter side, there is no concern that it will interfere with the resolver stator 56.
  • the portion of the outer peripheral edge of the pressing plate 58 located on the outer periphery of the claw portion 60 is retracted inward in the radial direction of the pressing plate 58 (see FIG. 3).
  • the cover member 22d is fixed to the first partition casing 22a with bolts 23. Therefore, by designing the outer peripheral edge shape of the holding plate 58 as described above, the bolt 23 can be provided at a position that is radially inward from the outermost diameter portion (the portion in contact with the circumscribed circle) of the cover member 22d. it can. Therefore, while both the holding plate 58 and the cover member 22d can be fixed to the first divided casing 22a by bolting, it is possible to prevent the diameter of the cover member 22d and the first divided casing 22a from increasing in diameter.
  • the holding plate 58 having the above configuration can be formed of any material, but the holding plate 58 is made of metal, particularly spring steel, in consideration of the elastic deformability of the holding plate 58 when tightening bolts as described above. Is good.
  • the elastic deformability of the arm portion 63 can be adjusted as appropriate, for example, the thickness dimension of the holding plate 58, the length of the arm portion 63, etc. Therefore, depending on the conditions, it is more versatile than resin or the like, not limited to metal. It is also possible to select low cost materials.
  • the in-wheel motor drive device 21 having the above configuration is housed inside the wheel housing 11 (see FIG. 2) and affects the unsprung load, so that it is essential to reduce the size and weight.
  • the resolver stator 56 is provided with a pressing plate 58 for axially pressing the resolver stator 56 with the casing 22 (first divided casing 22a), and the pressing plate 58 is provided.
  • the plate 58 is integrally provided with a plurality of claw portions 60 for axially pressing the resolver stator 56 at a plurality of positions in the circumferential direction, and a bolt fixing portion 61 at different positions in the circumferential direction from the claw portion 60. ..
  • the claws 60 and the bolt fixing portions 61 both of which form a part of the pressing plate 58, at different positions in the circumferential direction of the pressing plate 58, the claws 60 and the bolt fixing portions 61 can be provided.
  • the holding plate 58 can be fixed to the first divided casing 22a with bolts 59 while keeping a sufficient distance.
  • the claw portion 60 or the arm portion 63 which is the connecting portion between the claw portion 60 and the bolt fixing portion 61 can be elastically deformed in the axial direction relatively easily.
  • the holding plate 58 is a kind of plate.
  • the holding plate 58 Since it can function as a spring, it absorbs variations in the axial dimensions of the resolver stator 56 and absorbs variations in the axial dimensions of the resolver stator 56 without interposing an elastic ring between the resolver stator 56 and the first split casing 22a as in the conventional case. 56 can be positioned and fixed in the axial direction. Further, if the holding plate 58 is used, the holding plate 58 including a portion elastically deformed by a material resistant to vibration (mainly the arm portion 63 in this case) can be formed, so that the in-wheel motor driving device 21 such as unsprung vibration can be formed. Excellent positioning accuracy can be maintained even in an environment where peculiar vibration acts. Therefore, it is possible to continuously and stably exhibit the excellent detection performance of the resolver D.
  • a material resistant to vibration mainly the arm portion 63 in this case
  • the bolt fixing portion 61 is radially inside without interfering with the claw portion 60. Can be placed in.
  • the resolver D can be positioned with high accuracy while avoiding interference between the in-wheel motor drive device 21 (particularly, the radial outside of the resolver D mounting portion) and peripheral parts.
  • the resolver stator 56 can be fixed to the first divided casing 22a with the bolt 59, so that the first divided casing 22a is extended to the outer diameter side in order to provide the fitting fixing surface as in the conventional case. You don't even have to. Therefore, this also makes it possible to prevent the first division casing 22a and thus the in-wheel motor drive device 21 from becoming large in size, and to avoid interference with peripheral parts.
  • the in-wheel motor drive device 21 is not limited to the above embodiment, and can take any form within the scope of the present invention.
  • the claw portions 60 are provided at three locations in the circumferential direction of the pressing plate 58 , but of course, this is not limited to this.
  • the claw portion 60 may be provided at two locations in the circumferential direction, or may be provided at four or more locations.
  • the case where the bolt fixing portion 61 is arranged between the claw portions 60 adjacent to each other in the circumferential direction is illustrated, but of course, other arrangement modes can be adopted.
  • the thickness dimension of the claw portion 60 is equal to the thickness dimension of the bolt fixing portion 61 and the arm portion 63 is illustrated, but of course, this is not limited to this.
  • the thickness dimension of the claw portion 60 can be made larger than that of the arm portion 63 (in other words, the thickness dimension of the arm portion 63 can be made smaller than the thickness dimension of the claw portion 60 or the bolt fixing portion 61. It is possible).
  • the thickness of the claw portion 60 may be reduced toward the inside of the pressing plate 58 in the radial direction.
  • the planar shape of the claw portion 60 is not particularly limited, and the claw portion 60 having an arbitrary shape can be adopted as long as a part of the resolver stator 56 in the circumferential direction can be pressed in the axial direction.
  • the case where the arm portion 63 connecting the claw portion 60 and the bolt fixing portion 61 has a curved shape so as to bulge outward in the radial direction of the holding plate 58 has been illustrated (see FIG. 3).
  • the arm portion 63 may have a shape that extends linearly, and the claw portion 60 and the bolt fixing portion 61 may be connected to both ends of the arm portion 63.
  • the claw portion 60, the bolt fixing portion 61, and the arm portion 63 are all integrally formed of the same material, but of course, the present invention is not limited to this.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

La présente invention concerne un dispositif d'entraînement de moteur-roue 21 qui comprend : une partie moteur A destinée à entraîner une roue ; une partie de palier de roue C destinée à supporter en rotation la roue ; un résolveur D destiné à détecter un angle de rotation de la partie moteur A ; et un carter 22 destiné à loger au moins la partie moteur A. Le résolveur D comprend un rotor 55 fixé à l'arbre rotatif 26 de la partie moteur A et un stator 56 fixé au carter 22, et est en outre pourvu d'une plaque de pression 58 destinée à exercer une pression sur le stator 56 dans la direction axiale entre le carter 22 et la plaque de pression 58. La plaque de pression 58 comprend d'un seul tenant : une pluralité de parties clou 60 destinées à exercer une pression sur le stator 56 dans la direction axiale à une pluralité de positions dans leur direction circonférentielle ; et des parties de fixation de boulon 61 disposées à des positions différentes de celles des parties clou 60 dans la direction circonférentielle et fixées au carter 22 par des boulons 59.
PCT/JP2020/041679 2019-11-12 2020-11-09 Dispositif d'entraînement de moteur-roue WO2021095674A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-204752 2019-11-12
JP2019204752A JP2021075201A (ja) 2019-11-12 2019-11-12 インホイールモータ駆動装置

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WO2021095674A1 true WO2021095674A1 (fr) 2021-05-20

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Citations (8)

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JP2002165403A (ja) * 2000-11-20 2002-06-07 Fujitsu General Ltd 電動機
JP2006187130A (ja) * 2004-12-28 2006-07-13 Hitachi Ltd 捲回式鉛電池を電源とする電動パワーステアリングシステム及びそれに用いられるモータとインバータ装置
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