CN219007579U - Wheel driving device - Google Patents

Abstract

The application discloses wheel limit drive arrangement includes: the device comprises a wheel driving device, a motor device, a speed regulating device, an electromagnetic braking device and a hydraulic braking device; the motor device comprises a motor stator, a motor rotor, a motor shell and a motor shaft; the speed regulating device comprises a planetary gear, a planetary carrier, an inner gear ring and a speed regulating shell; the motor shaft is configured to have a transmission gear capable of cooperating with the planetary gear; the electromagnetic braking device comprises a first brake disc; the wheel driving device comprises a mounting flange and a second brake disc; the hydraulic brake device comprises at least one brake caliper for contacting the second brake disc; the speed adjusting housing is configured with two mounting portions for mounting the brake caliper, the two mounting portions being disposed at different two circumferential positions relative to the motor shaft. The benefit of the present application is that a wheel drive arrangement is provided that has a better versatility for brake caliper mounting.

Description

Wheel driving device

Technical Field

The application relates to the technical field of wheel drive, in particular to a wheel drive device.

Background

In the field of new energy automobile driving, the application of the distributed wheel driving technology is particularly important. Compared with the traditional automobile system, the wheel side driving system reduces devices such as a differential mechanism and the like, so that the wheel side driving system has the advantages of small size, light weight, high efficiency, high integration level and the like.

In the related art, for example, a brake caliper in a wheel side driving apparatus described in chinese patent document CN103821847a can be mounted at a relatively fixed position only by bolts, so that when the wheel side driving apparatus is assembled in a vehicle, it is necessary to provide different mounting positions for the wheel side driving apparatus, and to distinguish between left and right sides during mounting, otherwise, assembly errors may occur.

Aiming at the problem of influencing modular assembly caused by the mounting position of the brake caliper in the related art, no effective solution is proposed at present.

On the other hand, in the wheel side driving apparatus described in chinese patent document CN103821847a, since only one brake caliper can be mounted, the demand cannot be satisfied in some application scenarios in which it is necessary to increase the braking force.

In the wheel side driving apparatus described in chinese patent document CN103821847a, on the other hand, the direction of the screw of the bolt for fixing the brake caliper to the motor is substantially parallel to the direction of rotation of the motor shaft, so that the torque applied to the bolt when the brake caliper holds the brake disc affects the tightening degree of the bolt, and the brake caliper is loosened.

Disclosure of Invention

The content of the present application is intended to introduce concepts in a simplified form that are further described below in the detailed description. The section of this application is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

Some embodiments of the present application provide a wheel side driving apparatus, including: wheel drive means for providing a mounting structure for mounting the wheel and driving the wheel means; the motor device is used for converting electric energy into mechanical energy and driving the wheel driving device to rotate; the speed regulating device is used for regulating the rotating speed of the wheel driving device relative to the motor device; the electromagnetic braking device is used for converting electric energy into magnetic energy so as to indirectly prevent the wheel driving device from rotating; the hydraulic braking device is used for converting potential energy into mechanical energy to directly prevent the wheel driving device from rotating; the motor device comprises a motor stator, a motor rotor, a motor shell and a motor shaft; the motor rotor can rotate relative to the motor stator, the motor stator and the motor rotor are accommodated in the motor shell, and the motor shaft and the motor rotor form anti-rotation connection; the motor shaft is in rotary connection with the motor shell; the speed regulating device comprises a planetary gear, a planetary carrier, an inner gear ring and a speed regulating shell; the planetary gear is rotationally connected to the planetary gear carrier, the planetary gear carrier is rotationally connected with the speed regulation shell, and the planetary gear is meshed with the annular gear; the motor shaft is configured to have a transmission gear capable of cooperating with the planetary gear; the electromagnetic braking device comprises a first brake disc; the wheel driving device comprises a mounting flange and a second brake disc; the hydraulic brake device comprises at least one brake caliper for contacting the second brake disc; the speed adjusting housing is configured with two mounting portions for mounting the brake caliper, the two mounting portions being disposed at different two circumferential positions relative to the motor shaft.

Further, the mounting portion is provided with more than two mounting screw holes.

Further, the mounting screw holes of one mounting portion have the same extending direction.

Further, the mounting screw holes of the two different mounting portions have different extending directions.

Further, one mounting portion has two mounting screw holes.

Further, the mounting portion is further configured with a mounting groove recessed at least in a direction approaching the motor shaft.

Further, the mounting groove is arranged between the two mounting screw holes.

Further, the mounting portion includes at least two inclined wall surfaces, the inclined wall surfaces being parallel to the axis of the motor shaft, one inclined wall surface obliquely intersecting the other inclined wall surface.

Further, the mounting portion includes at least one straight wall surface perpendicular to the axis of the motor shaft, one straight wall surface being disposed between the two inclined wall surfaces such that the mounting groove is configured in an open structure on the other side opposite to the straight wall surface.

Further, the mounting portion includes at least one arc wall surface provided between the two inclined wall surfaces such that the mounting groove is constructed in a closed structure in a direction approaching the motor shaft.

The beneficial effects of this application lie in: a wheel drive device is provided that has better versatility for brake caliper installation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application.

In addition, the same or similar reference numerals denote the same or similar elements throughout the drawings. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.

In the drawings:

FIG. 1 is a schematic overall construction of a wheel side drive according to one embodiment of the present application;

FIG. 2 is a schematic view of the internal structure of the wheel side drive device shown in FIG. 1;

FIG. 3 is an enlarged schematic view of a portion of FIG. 2;

FIG. 4 is an enlarged schematic view of another portion of FIG. 2;

FIG. 5 is a schematic perspective view of a portion of the motor assembly of the wheel side drive assembly of FIG. 1;

FIG. 6 is a perspective view of another view of the motor assembly portion of the wheel side drive assembly of FIG. 1;

FIG. 7 is a schematic perspective view of a portion of an electromagnetic brake in the wheel side drive of FIG. 1;

FIG. 8 is a schematic view of the main housing shown in FIG. 7;

Fig. 9 is a schematic view showing the structure of the main chassis shown in fig. 7 after being disassembled;

FIG. 10 is a schematic view of the motor end cap of FIG. 7;

FIG. 11 is a schematic view of the end housing of FIG. 7;

FIG. 12 is a schematic view of a portion of the components of FIG. 7;

FIG. 13 is a schematic view showing an internal structure of an electromagnetic brake apparatus in the wheel side driving apparatus shown in FIG. 1;

FIG. 14 is an exploded schematic view of a portion of the construction of the wheel side drive shown in FIG. 1;

FIG. 15 is a perspective view of a retainer in the wheel side drive of FIG. 1;

FIG. 16 is a schematic perspective view of a portion of the reduction gear unit of the wheel-side drive device of FIG. 1;

FIG. 17 is an exploded schematic view of a portion of the reduction gear unit of the wheel-side drive unit of FIG. 1;

FIG. 18 is a perspective view of another partial structure of the wheel side drive device shown in FIG. 1;

FIG. 19 is a schematic view of the mounting flange, planet carrier, and second brake disc of the wheel drive assembly shown in FIG. 1;

FIG. 20 is a schematic perspective view of a portion of a hydraulic brake device in the wheel side drive device shown in FIG. 1;

FIG. 21 is a schematic perspective view of a further portion of the wheel side drive shown in FIG. 1;

FIG. 22 is a schematic perspective view of a timing housing of the wheel side drive of FIG. 1;

Fig. 23 is a schematic plan view of one side of the governor housing shown in fig. 22;

fig. 24 is a schematic plan view of the other side of the governor housing shown in fig. 22;

fig. 25 is a schematic perspective view of the other side of the governor housing shown in fig. 22.

The meaning of the reference numerals in the figures is:

100. wheel driving device;

200. an electromagnetic braking device;

201. a first brake disc; 2011. a movable disk key hole;

202. a dynamic friction plate; 2021. a disc edge notch;

203. an electromagnetic coil;

204. an end housing; 2041. a magnet groove; 2042. a biasing groove; 2043. a thread groove;

205. a guide sleeve;

206. a guide bolt;

207. a static friction plate; 2071. a disc edge notch; 2072. a disk through hole;

208. a transition housing;

209. a shaft end piece;

210. a limiting piece;

211. open slot;

212. an end bolt;

213. a biasing member;

214. a holder; 141. a contact surface;

215. a shaft end bolt; 300. a motor device;

301. a motor shaft; 3011. a first end; 3012. a second end; 3013. a transmission key; 3014. a drive tooth; 3015. a first shoulder step; 3016. a second shoulder step; 3017. an axial hole; 3018. a central axis;

302. a motor stator;

303. A motor rotor;

304. a motor housing; 3041. a main housing; 3042. an inner shell; 3042a, inner shell ribs; 3042b, liquid cooled interlayer; 3042c, a first bearing inner groove; 3042d, a first shaft hole; 3043. an outer shell; 3043a, a first fluid flow orifice; 3043b, a second flow orifice; 3044. a motor end cover; 3044a, a second bearing inner tank; 3044b, a second shaft hole;

305. a first limit bearing;

306. the second limit bearing;

307. a bearing platen;

308. a platen bolt;

309. a support bearing;

400. a speed regulating device;

401. a speed regulating shell; 4011. a rotation stopping groove; 4012. a mounting part; 4012a, mounting slots; 4013. a mounting column; 4013a, mounting screw holes; 4013b, extending direction 4014 and inclined wall surface; 4015. an arc wall surface; 4016. a straight wall surface;

402. an inner gear ring;

403. a planetary gear;

404. a planet carrier; 4041. a wheel carrier part; 4042. a gear portion; 4042a, a gear structure;

405. a rotation stop pin;

500. a wheel driving device;

501. a mounting flange; 5011. driving internal teeth; 5012. a flange bulge; 5013. a gear ring structure;

502. installing a bolt;

503. axis of symmetry

600. A hydraulic braking device;

601. a second brake disc; 6011. embedding the groove;

602. A brake caliper;

6021. and a brake pad.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

It should be noted that, for convenience of description, only the portions relevant to the present application are shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.

In the description of the present application, it should be noted that, if the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally puts in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.

In the description of the present application, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. It will be understood by those of ordinary skill in the art that the specific meaning of such terms in this application

It should be noted that references to "one" or "a plurality" in this application are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be interpreted as "one or more" unless the context clearly indicates otherwise.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 24, a wheel side driving apparatus 100 of the present application as an example includes the following main components: electromagnetic brake device 200, motor device 300, speed governor device 400, wheel drive device 500, and hydraulic brake device 600.

The following describes the main parts of the wheel drive device 100 in detail in connection with the accompanying drawings.

Wheel driving device

The wheel drive device 500 is used to provide a mounting structure for mounting a wheel (not shown in the drawings, the same applies hereinafter) and for driving the wheel. In particular, the wheel drive device 500 is used for achieving torque output, i.e. for mounting and directly driving the wheels of a vehicle, and the wheel drive device 500 may be connected to the hubs of the wheels to drive the wheels to rotate.

As a specific solution, as shown in fig. 1, 2 and 19, the wheel driving device 500 includes: a mounting flange 501 and a number of mounting bolts 502. The mounting flange 501 is used to provide a mounting carrier for the mounting bolts 502, and the mounting bolts 502 are used to form a fastening connection with the wheel to mount the wheel.

It should be noted that, the mounting bolts 502 may be used to mount wheels of various specifications, so that the wheel driving device 500 can meet various mounting requirements.

Motor device

The motor device 300 is used to convert electric energy into mechanical energy and drive the wheel drive 500 to rotate. The motor device 300 is used as a power source in the wheel side driving apparatus 100, and allows the wheel side driving apparatus 100 to independently drive the output torque required for the wheels when the power source is provided.

Referring to fig. 1, 2, 4, 5, and 6, the motor apparatus 300 includes: a motor shaft 301, a motor stator 302, a motor rotor 303 and a motor housing 304.

Wherein, the motor shaft 301 and the motor rotor 303 form a rotation stopping connection, so that the motor shaft 301 is driven by the motor rotor 303 to synchronously rotate when the motor device 300 is powered on; the motor shaft 301 is rotatably connected to the motor housing 304, i.e. the motor shaft 301 can rotate relative to the motor housing 304.

Preferably, both ends of the motor shaft 301 are connected to the electromagnetic brake 200 and the speed regulating device 400, respectively. Both ends of the motor shaft 301 extend out of the motor housing 304, respectively, i.e., in the axial direction of the motor shaft 301 (i.e., the axial direction of the central axis 3018), the projection of the motor housing 304 is located within the projection range of the motor shaft 301.

The above design enables the first end 3011 of the motor shaft 301 to be used for braking by being locked by the electromagnetic braking device 200, while the second end 3012 of the motor shaft 301 is used for outputting torque to the wheel drive device 500. Both ends of the motor shaft 301 extend out of the motor housing 304 and are connected to the electromagnetic brake 200 and the speed regulating device 400, respectively.

As a specific solution, one end of the motor shaft 301 connected to the electromagnetic braking device 200 is defined as a first end 3011, and the other end of the motor shaft 301 connected to the speed regulating device 400 is defined as a second end 3012.

To achieve torque transfer, both the first end 3011 and the second end 3012 of the motor shaft 301 are provided with gearing arrangements. Specifically, a first end 3011 of the motor shaft 301 is provided with a drive key 3013 and a second end 3012 of the motor shaft 301 is provided with drive teeth 3014.

As a specific solution, the motor arrangement 300 is configured as an inner rotor motor, i.e. the rotor of the motor arrangement 300 is located inside the stator.

The wheel side driving device 100 of the present application adopts a motor shaft 301 to form a motor device 300, an electromagnetic braking device 200 and a speed regulating device 400 into an organic whole, and adopts an inner rotor motor structure to help realize such a structure and the combination of the motor shaft 301 and a motor rotor 303.

The motor housing 304 encloses an interior space for accommodating the motor stator 302 and the motor rotor 303, the motor stator 302 being fixedly arranged in the interior space of the motor housing 304, the motor rotor 303 being mounted on the motor shaft 301 in a rotationally fixed manner.

The motor rotor 303 is rotatably arranged in a motor housing 304 via a motor shaft 301, i.e. the motor rotor 303 is in a rotational connection with the motor housing 304.

As a more specific aspect, referring to fig. 3, 4 to 9, 12 and 16, the motor apparatus 300 further includes: at least one support bearing 309. The support bearings 309 are used for supporting the motor shaft 301 to rotate relative to the housing, and specifically, at least two support bearings 309 are sleeved on the motor shaft 301 to realize a rotational connection between the motor shaft 301 and the motor housing 304. The motor shaft 301 is rotatable relative to the motor housing 304 about a central axis 3018 by support of support bearings 309. The specific scheme of support bearing 309 is known to those skilled in the art as a ball bearing scheme, and is not described in detail herein.

The motor shaft 301 is formed with a first shoulder step 3015 and a second shoulder step 3016 that cooperate with the stepped structure of the first bearing inner groove 3042c and the second bearing inner groove 3044a, respectively, within the motor housing 304 to limit the axial position of the support bearing 309.

Specifically, the two support bearings 309 are respectively snapped to the first shoulder step 3015 and the second shoulder step 3016.

Preferably, in order to better limit the axial position of the motor shaft 301, referring to fig. 2 and 5, the motor device 300 further includes: bearing presser plate 307, bearing presser plate 307 serves to limit the relative position of support bearing 309 and motor housing 304 in the axial direction of motor shaft 301 (i.e., in the axial direction of central axis 3018).

More specifically, the bearing platen 307 is configured in an annular structure, and the motor shaft 301 passes through the bearing platen 307 and is rotatable within the annular structure of the bearing platen 307. The bearing platen 307 is fixed to the motor housing 304 (inner housing 3042) by at least two platen bolts 308, and an inner edge of the annular structure of the bearing platen 307 interferes with the support bearing 309 in a radial direction (also the central axis 3018) of the motor shaft 301, so that the bearing platen 307 restricts an axial position of one side of the support bearing 309 by contact with the support bearing 309, and the other side of the support bearing 309 is restricted by the motor housing 304, that is, the bearing platen 307 and the motor housing 304 fix the axial position of the support bearing 309 with respect to the central axis 3018 from both sides. When the support bearings 309 have a fixed axial position, the motor shaft 301 has a defined axial position relative to the entire motor housing 304 by virtue of the spacing action of the two support bearings 309 with respect to each other by the first shoulder steps 3015 and the second shoulder steps 3016, avoiding axial play of the motor shaft 301 and the support bearings 309.

As an alternative, a bearing pressure plate 307 can be provided at the other support bearing 309 instead of the bearing pressure plate 307 in the exemplary embodiment shown here in order to achieve an axial positioning of the motor shaft 301, i.e. one bearing pressure plate 307 is still used but is used to limit the position of the other support bearing 309.

As an extension, one bearing pressure plate 307 may be provided at the other support bearing 309, which limits the support bearing 309 separately from the bearing pressure plate 307 in the presently illustrated embodiment to achieve axial positioning of the motor shaft 301, i.e. two bearing pressure plates 307 are used to limit the position of the two support bearings 309 separately.

In general, the bearing platen 307 may be fixed to the notch of the first bearing inner groove 3042c or the second bearing inner groove 3044 a.

As a preferred embodiment, referring to fig. 2 and 5 to 9, the motor housing 304 includes: a main housing 3041 and a motor end cap 3044.

Wherein the main housing 3041 is configured to form a substantial portion of the interior space of the motor housing 304, the motor end cap 3044 is configured to close the opening formed by the main housing 3041, such a split structure can facilitate the installation of other components of the motor apparatus 300.

As a further preferable aspect, the main chassis 3041 includes: the motor device 300 comprises an inner layer housing 3042 and an outer layer housing 3043, wherein the inner layer housing 3042 is formed with a plurality of inner layer ribs 3042a, a liquid cooling interlayer 3042b is formed between the inner layer housing 3042 and the outer layer housing 3043, the liquid cooling interlayer 3042b is used for containing liquid such as water and other coolants required by liquid cooling, the inner layer ribs 3042a are used for guiding liquid flow, the outer layer housing 3043 is formed with a first liquid flow pipe orifice 3043a and a second liquid flow pipe orifice 3043b, one of the first liquid flow pipe orifice 3043a and the second liquid flow pipe orifice 3043b is used for guiding liquid flow, and the other liquid flow is used for guiding out liquid flow, so that liquid cooling and heat dissipation of the motor device 300 are achieved.

Specifically, the motor housing 304 is formed with at least one bearing inner groove (first bearing inner groove 3042c, second bearing inner groove 3044 a) to accommodate and position the support bearing 309 inside the motor housing 304.

Preferably, the inner housing 3042 is formed with a first shaft hole 3042d through which the motor shaft 301 passes, and a groove structure is formed at the periphery of the first shaft hole 3042d to mount the support bearing 309, i.e., the first bearing inner groove 3042c; correspondingly, the motor end cover 3044a is formed with a second shaft hole 3044b through which the motor shaft 301 passes, and a groove structure is formed at the periphery of the second shaft hole 3044b to mount the other support bearing 309, i.e., the second bearing inner groove 3044a. The first bearing inner groove 3042c and the second bearing inner groove 3044a may be formed by forming an annular stepped boss structure inward of the inner housing 3042 and the motor end cover 3044, respectively.

Based on the dimensional difference in the axial direction of the inner layer housing 3042 and the motor end cover 3044, as a preferred embodiment, only one bearing platen 307 is provided, the bearing platen 307 is fixed to the inner layer housing 3042 by a platen bolt 308, and the connection of the bearing platen 307 can be made more stable due to the thicker inner layer housing 3042, thereby ensuring the effect of preventing axial play.

By adopting the scheme of the inner housing 3042 and the outer housing 3043, the structural strength of the main housing 3041 can be ensured, and meanwhile, the cooling requirement of the motor device 300 is considered, and the effective heat dissipation of the motor device 300 is necessary due to the application scenario of the wheel side driving device 100.

As a preferred solution, the motor end cover 3044 is fixedly connected to the inner layer housing 3042 through bolting, so that the inner layer housing 3042 can use a larger wall thickness to ensure the stability of fixing the motor end cover 3044, and in addition, the inner layer housing 3042 can easily form the inner shell ribs 3042a.

Speed regulating device

The speed regulating device 400 is used for regulating the rotation speed of the wheel driving device 500 relative to the motor device 300.

The speed regulating device 400 is generally used to reduce the rotational speed of the motor shaft 301, so that the wheel side driving apparatus 100 outputs a high torque. Of course, the speed adjusting device 400 may also realize a speed adjusting function from a low speed to a high speed.

Referring to fig. 1, 2, and 17 to 22, the speed regulating device 400 includes: a speed regulation housing 401, an inner gear ring 402, three planetary gears 403, and a planetary carrier 404.

The speed adjusting housing 401 is fixedly mounted to the motor housing 304 by bolts, and specifically, the speed adjusting housing 401 is directly fixedly connected with the inner housing 3042 by bolts (not shown).

A space for accommodating the ring gear 402, the pinion gears 403, and the carrier 404 is formed between the speed adjusting case 401 and the inner case 3042.

The advantage of adopting such a scheme is that the inner layer housing 3042 is multiplexed, and the speed regulating housing 401 is directly connected with the inner layer housing 3042, so that components required for speed regulation can be directly installed between the inner layer housing and the speed regulating housing, and when maintenance is required, the speed regulating housing 401 is directly opened, so that modularized maintenance of the speed regulating device 400 can be realized.

The inner gear ring 402 is arranged inside the speed regulation shell 401 and forms a rotation-stopping connection with the speed regulation shell 401, the planetary gears 403 are respectively connected to the planetary carriers 404 in a rotating way, the gear teeth of the planetary gears 403 are meshed with the inner teeth of the inner gear ring 402, so that the planetary carriers 404 can rotate relative to the speed regulation shell 401, and the planetary carriers 404 rotate around the central axis 3018; meanwhile, the planet carrier 404 and the wheel driving device 500 form a rotation stopping connection, so that the wheel driving device 500 is driven to rotate around the central axis 3018 when the planet carrier 404 rotates, and specifically, the planet carrier 404 and the mounting flange 501 in the wheel driving device 500 directly form a rotation stopping connection.

It should be noted that, the rotation-stopping connection in the present application means that two objects to be connected cannot rotate relative to each other.

Three planetary gears 403 are disposed on the outer periphery of the second end 3012 of the motor shaft 301 and are in meshing connection with the motor shaft 301; the gear teeth 3014 of the second end 3012 of the motor shaft 301 are in mesh with the gear teeth of the three planetary gears 403. Thus, when the motor shaft 301 rotates, the planet carrier 404 is driven to rotate at a lower rotational speed according to the principle of the planetary transmission system.

Preferably, a plurality of inner ring grooves (not labeled in the figure) are formed on the outer side of the inner ring gear 402, and a rotation stop pin 405 is arranged in the inner ring grooves; correspondingly, a plurality of rotation stopping grooves 4011 are formed in the inner side of the speed regulation shell 401, and rotation stopping pins 405 are partially accommodated in grooves of the ring gear 402 and partially accommodated in the rotation stopping grooves 4011, so that the ring gear 402 cannot rotate relative to the speed regulation shell 401, and rotation stopping connection is achieved.

Preferably, the planet carrier 404 comprises two parts: a carrier portion 4041 and a gear portion 4042.

Wherein the carrier portion 4041 is formed with a frame structure for rotatably connecting the planetary gears 403; the gear portion 4042 is formed with a gear structure 4042a that mates with the drive mounting flange 501. Correspondingly, the mounting flange 501 is formed with a corresponding ring gear structure 5013 to effect torque transfer.

Other technical schemes that may be adopted by the speed adjusting device 400 to implement speed adjustment are known to those skilled in the art, and are not described herein.

Electromagnetic braking device

The electromagnetic braking device 200 is used to convert electrical energy into magnetic energy to indirectly prevent the wheel drive 500 from rotating.

As a general application of the electromagnetic brake apparatus 200, the electromagnetic brake apparatus 200 is used for braking when the vehicle is stationary. Of course, in some cases, the electromagnetic braking device 200 may also perform the function of auxiliary braking.

Specifically, referring to fig. 1, 2, and 10 to 16, the electromagnetic brake apparatus 200 includes: first brake disc 201, dynamic friction disc 202, solenoid 203, biasing member 213, retainer 214, end housing 204, guide sleeve 205, guide bolt 206, static friction disc 207, transition housing 208, shaft end 209, and stop 210.

Specifically, the first brake disc 201 is provided with a rotor key hole 2011, and the first brake disc 201 is sleeved on the motor shaft 301 through the rotor key hole 2011.

The rotor key hole 2011 is formed with a key structure that mates with the drive key 3013 of the first end 3011 of the motor shaft 301, thereby enabling the first brake rotor 201 to form a rotation-stopping connection with the motor shaft 301, that is, the first brake rotor 201 can rotate synchronously with the motor shaft 301.

In this way, when the resistance force acts on the first brake disc 201, the resistance force acts on the motor shaft 301. Of course, other structures may be used to implement the sleeving and rotation-stopping connection of the first brake disc 201 to the motor shaft 301, which are known to those skilled in the art, and will not be described herein.

The movable friction disc 202 is movably connected with the first brake disc 201, so that the movable friction disc 202 at least has a contact position or a release position relative to the first brake disc 201, the movable friction disc 202 contacts with the first brake disc 201 when in the contact position, and the movable friction disc 202 is separated from the first brake disc 201 when in the release position.

The dynamic friction disk 202 is provided slidably in the axial direction (the axial direction of the central axis 3018, the same applies hereinafter) so as to have at least a contact position or a release position with respect to the first brake disk 201, the dynamic friction disk 202 being in contact with the first brake disk 201 in the contact position, and the dynamic friction disk 202 being released from the first brake disk 201 in the release position. Meanwhile, the dynamic friction disc 202 and the end housing 204 form a rotation-stopping connection, so that when contacting the first brake disc 201, it applies a resistance force to the first brake disc 201, which prevents rotation thereof, due to friction.

Since the first brake disc 201 is also axially limited slidable relative to the motor shaft 301, the above-described contact and release positions do not refer to one absolute position, but two (or more) relative positions of the dynamic friction disc 202 relative to the first brake disc 201.

The electromagnetic coil 203 is used for generating a magnetic field for moving the dynamic friction disk 202 to the disengaging position when the electromagnetic coil is electrified; the biasing member 213 is used to apply a force to the friction plate 202 to move the friction plate 202 toward the contact position.

Specifically, the dynamic friction plate 202 is configured to have a magnetic material so that it can be driven by the magnetic field of the electromagnetic coil 203 when the magnetic field changes. The biasing member 213 biases the movable friction plate 202 toward contact with the first brake plate 201 by direct contact with the movable friction plate 202 using a spring force. When the electromagnetic coil 203 does not generate a magnetic field, the movable friction disk 202 contacts the first brake disk 201 due to the biasing member 213 to achieve a braking effect, and when the braking effect needs to be released, the electromagnetic field generates a magnetic field that attracts the movable friction disk 202 to overcome the biasing member 213 and thereby move the movable friction disk 202 out of contact with the first brake disk 201.

Preferably, the biasing member 213 is configured as a coil spring, the end housing 204 is configured with a plurality of biasing grooves 2042, the biasing grooves 2042 are configured to accommodate at least a portion of the biasing member 213, the biasing member 213 is at least partially accommodated in the biasing grooves 2042 and is in contact with the friction plate 202, and further preferably, the coil springs as the biasing member 213 are respectively accommodated in the biasing grooves 2042.

The guide sleeve 205 is used for guiding the movement of the movable friction disk 202 so that the movable friction disk 202 and the end shell 204 form a sliding connection; the guide bolts 206 are used to fix the guide bush 205 to the end housing 204 so that the guide bush 205 is provided at the outer periphery of the electromagnetic coil 203.

The end housing 204 is also configured with a number of threaded slots 2043 for mating with the guide bolts 206; the guide bolt 206 is provided with external threads, and the thread groove 2043 is provided with internal threads that mate with the external threads of the guide bolt 206.

Preferably, as shown in fig. 11 to 13, the friction disk 202 is configured as an annular disk-like structure, and its edges are provided with a plurality of disk edge notches 2021, and the guide sleeve 205 passes through these disk edge notches 2021 to thereby guide the sliding motion of the friction disk 202. More specifically, the guide sleeve 205 is provided with a pipe hole, and the guide bolt 212 sequentially passes through the disk through hole 2072 of the static friction disk 207 and the guide sleeve 205 and then is connected to the end housing 204, thereby functioning to connect the static friction disk 207 and also functioning to guide the dynamic friction disk 202 and make a rotation-stopping connection with the end housing 204.

Specifically, the static friction disc 207 is in fixed connection with the end housing 204 to contact the first brake disc 201 when the dynamic friction disc 202 contacts and biases the first brake disc 201 to a preset position; wherein the first brake disc 201 is slidably arranged between the dynamic friction disc 202 and the static friction disc 207.

The transition housing 208 is configured to surround at least the first brake disc 201 to accommodate the first brake disc 201 in an enclosed space; wherein the transition housing 208 is configured as an annular structure and is disposed between the end housing 204 and the static friction disk 207.

Preferably, the static friction plate 207 is also constructed as an annular plate-like structure, and the edge thereof is provided with a plurality of plate edge notches 2071, and the other part of the guide bolt 212 and the guide sleeve 205 integrally passes through the static friction plate 207 through the plate edge notches 2071.

The retainer 214 is adapted to be fitted to the motor shaft 301 and to apply a force to the first brake disc 201 at least in a direction opposite to the force applied by the biasing member 213.

One of the forces applied to the first brake disc 201 by the retainer 214 is to maintain the attitude of the first brake disc 201, and prevent the first brake disc 201 from swinging sideways (in the left-right direction from the view of fig. 2) to thereby contact other members to generate frictional noise. Another effect of the force applied by the retainer 214 to the first brake disc 201 is that the retainer 214 also applies an elastic force that allows it to be centered back out of contact with the static friction disc 207. That is, the retainer 214 is used to both fit to the motor shaft 301 and apply a force to the first brake disc 201 that maintains the attitude of the first brake disc 201 at least in a direction opposite to the force applied by the biasing member 213; and is further adapted to be fitted to the motor shaft 301 and apply a force to the first brake disc 201 that maintains the attitude of the first brake disc 201 at least in a direction opposite to the force applied by the biasing member 213.

As a concrete scheme, the dynamic friction disc 202 is disposed between the first brake disc 201 and the electromagnetic coil 203; the first brake disc 201 is disposed between the dynamic friction disc 202 and the retainer 214. Namely, as shown in fig. 2, the electromagnetic coil 203, the dynamic friction plate 202, the first brake plate 201, the retainer 214, and the stopper 210 are disposed in this order from left to right.

Preferably, the static friction plate 207 is provided with an annular structure, so that the motor shaft 301 and the retainer 214 and the limiting member sleeved on the motor shaft 301 can penetrate through the static friction plate 207, and thus in the axial direction, the retainer 214, the limiting member 210 and other components are overlapped with the static friction plate 207 and share the same axial position, so that the wheel rim driving device 100 of the present application is more compact in axial dimension.

As a specific solution, to limit the axial position of the retainer 214, the limiter 210 is sleeved on the motor shaft 301, one end surface of the limiter 210 contacts with a step structure (not labeled in the drawing) of the motor shaft 301, and the other end surface contacts with the retainer 214, so that the retainer 214 is limited between the limiter 210 and the first brake disc 201. Preferably, the stop 210 is disposed between the retainer 214 and the first shoulder step 3015.

Alternatively, the retainer 214 may be a coil spring. However, due to the limited axial space and for better dynamic balance, the retainer 214 is preferably configured to have at least one contact surface 141 that obliquely intersects the movement of the dynamic friction disk 202, so that the retainer 214 can be moved and deflected to achieve adaptive dynamic balance adjustment when the motor shaft 301 and the first brake disk 201 are rotated at high speed as a whole.

As a particularly preferred embodiment, as shown in fig. 15 and 16, the retainer 214 is configured as a wave washer.

In order to limit the axial position of the first brake disc 201 from the other side of the first brake disc 201, the shaft end piece 209 is fixedly connected to the first end 3011 of the motor shaft 301 by means of the shaft end bolt 215; the shaft end piece 209 serves to limit the position of the first brake disc 201 on the side of the first brake disc 201 remote from the holder 214. The first brake disc 201 is arranged between the holder 214 and the shaft end piece 209.

The end housing 204 and the transition housing 208 constitute a space accommodating the above components, and similarly to the speed regulating device 400, the electromagnetic brake apparatus 200 also multiplexes the motor end cover 3044 of the motor apparatus 300, the end housing 204 is fastened to the motor end cover 3044 by the end bolts 212, and the transition housing 208 is disposed between the static friction plate 207 and the end housing 204 to be clamped by the two parts to complete fixation.

In particular, the end housing 204 is configured with a magnet slot 2041 for receiving at least a portion of the electromagnetic coil 203, the electromagnetic coil 203 being at least partially received in the magnet slot 2041.

More specifically, the magnet slot 2041 is an annular recess that is open on the side facing the motor apparatus 300, and preferably the depth of the magnet slot 2041 is adapted to the electromagnetic coil 203 so that the electromagnetic coil 203 is fully received in the magnet slot 2041.

As a concrete scheme, the movable friction plate 202 is disposed at the notch of the magnet groove 2041, and the movable friction plate 202 is at least partially exposed to the end housing 204 in the axial direction, i.e., the movable friction plate 202 is not accommodated in the magnet groove 2041 but is disposed outside the magnet groove 2041.

As a preferred option, the end housing 204 is configured with an annular configuration end housing 204. The end housing 204 and the dynamic friction disk 202 are both annular in configuration so that the electromagnetic brake apparatus 200 forms an open slot 211 exposing the motor shaft 301.

Preferably, in order to achieve heat dissipation of the motor device 300 and the electromagnetic brake device 200, the motor shaft 301 is provided with an axial hole 3017 at a first end 3011 thereof, and the wheel rim driving device 100 is formed with an open slot 211 as a whole, and the open slot 211 may expose the axial hole 3017 to the side of the wheel rim driving device 100 where the electromagnetic brake device 200 is provided, and the open slot 211 is surrounded by at least the electromagnetic coil 203 and the dynamic friction plate 202. Accordingly, the dynamic friction disc 202 and the first brake disc 201 are accommodated in a space surrounded by the transition housing 208, i.e., in the axial direction, the dynamic friction disc 202 and the first brake disc 201 correspond to the position of the transition housing 208.

In this way, the open groove 211 is formed to have a larger size so that the first brake disc 201 is exposed to the open groove 211 in a large area, and the inner edge of the movable friction disc 202 is exposed to the open groove 211, so that heat can be timely dissipated through the open groove 211 when the friction of the brake discs generates heat, and the transition housing 208 is formed to have a smaller thickness and is made of a material easy to dissipate heat, so that the movable friction disc 202 and the outer edge portion of the first brake disc 201 can dissipate heat through the transition housing 208. Shaft center hole 3017 of motor shaft 301

By adopting the scheme, the electromagnetic braking device 200 is convenient to overhaul and can effectively dissipate heat. And, the electromagnetic braking device 200 has a high modularization degree, and is convenient for production and maintenance.

Hydraulic brake device

The hydraulic brake device 600 is used to convert potential energy into mechanical energy to directly prevent the wheel drive device 500 from rotating, and in general, the hydraulic brake device 600 is used to perform a braking function.

Referring to fig. 19 to 25, a hydraulic brake device 600 includes: a second brake disc 601 and a brake caliper 602. Specifically, the second brake disc 601 and the wheel drive device 500 form a rotation-stopping connection.

More specifically, the second brake disc 601 is fixedly connected to the mounting flange 501 by bolts (not shown). As a more specific scheme, in order to enhance stability of torque transmission, the edge of the mounting flange 501 is formed with a plurality of flange protrusions 5012 protruding outward; correspondingly, the second brake disc 601 is configured as an annular structure, the second brake disc 601 is formed with a plurality of embedded grooves 6011 at the inner edge of the annular structure for being matched with the flange protrusions 5012, and the matching of the flange protrusions 5012 with the embedded grooves 6011 can improve the braking effect, not just the torque transmission through the fastening of bolts.

The second brake disc 601 may be a general scheme of a brake disc in a caliper brake, such as a sandwich design, which is a technical scheme well known to those skilled in the art, and will not be described herein.

As a specific solution, the brake caliper 602 includes: two brake pads 6021 which can be hydraulically driven to hug the second brake disc 601, the two brake pads 6021 being arranged on both sides of the second brake disc 601, respectively. This is also a technical solution known to the person skilled in the art and is not described in detail here.

Preferably, in order to better mount the brake caliper 602 and to enhance the modularity of the wheel side drive apparatus 100 so as to have universal mounting performance, referring to fig. 22 to 23, the speed adjusting housing 401 is configured to have two mounting portions 4012 for mounting the brake caliper 602, the two mounting portions 4012 being provided at different two circumferential positions with respect to the motor shaft 301.

As a concrete scheme, each mounting portion 4012 includes: two mounting posts 4013, two sloped walls 4014, an arc wall 4015, and a straight wall 4016. Wherein, two inclined wall surfaces 4014 and one arc wall surface 4015 form a mounting groove 4012a between two mounting posts 4013, and the mounting posts 4013 are provided with mounting screw holes 4013a, so that the mounting groove 4012a is arranged between the two mounting screw holes 4013a, the mounting groove 4012a is opened on one side in the axial direction, and the other side is closed by a straight wall surface 4016, so that the brake caliper 602 can be mounted from the side where the mounting groove 4012a is opened. Both mounting posts 4013 are formed with mounting screw holes 4013a, and brake caliper 602 can be fixedly mounted by the cooperation of bolts and mounting screw holes 4013 a.

Preferably, the straight wall surfaces 4016 are perpendicular to the axis of the motor shaft 301, with one straight wall surface 4016 being disposed between two inclined wall surfaces 4014 such that the mounting groove 4012a is configured in an open configuration on the opposite side from the straight wall surfaces 4016.

As a specific solution, the inclined wall surfaces 4014 are parallel to the central axis 3018, i.e., the rotational axis of the motor shaft 301, and one inclined wall surface 4014 in one mounting portion 4012 obliquely intersects the other inclined wall surface 4014.

Preferably, several mounting screw holes 4013a in one mounting portion 4012 have the same extension direction 4013b, so that brake caliper 602 can be mounted along this extension direction 4013 b. The mounting screw holes 4013a of the two different mounting portions 4012 have different extending directions 4013b so as to be mounted to the different mounting portions 4012 at different angles. In this way, the wheel side driving apparatus 100 of the present application can be made to function as a driving unit for left and right wheels by being mounted on different mounting portions 4012.

Preferably, the two mounting portions 4012 form mirror symmetry with respect to one symmetry axis 503, which symmetry axis 503 is arranged perpendicularly to the central main line, and the central axis 3018 intersects this symmetry axis 503. In this way, the corresponding mounting portion 4012 can be selected according to the required wheel mounting direction of the wheel driving device 100, so that the wheel driving device 100 can be mounted on the left side of the vehicle or the right side of the vehicle through the angular rotation of the wheel driving device 100, and the universality of the wheel driving device 100 is greatly improved. As a further preferred option, other configurations of wheel drive 100 may also be configured to be mirror symmetrical with respect to symmetry axis 503.

The main components of the wheel side drive 100 are described and illustrated above.

Integral layout

The overall layout of the wheel side drive device 100 will be described below.

Referring to fig. 1, 2, 11, 14, 15, 17, 19 and 22, the motor device 300 in the present application is disposed between the electromagnetic brake device 200 and the wheel drive device 500; the speed regulating device 400 is arranged between the motor device 300 and the wheel driving device 500; the speed regulating device 400 is disposed between the motor device 300 and the hydraulic brake device 600. Namely, referring to the view angle shown in fig. 2, the electromagnetic brake device 200, the motor device 300, the speed adjusting device 400, and the wheel drive device 500 are sequentially arranged from left to right. With this arrangement, the motor apparatus 300 is disposed between the mounting flange 501 and the electromagnetic coil 203, and the first brake disc 201 is disposed between the electromagnetic coil 203 and the wave washer.

This has the advantage that the electromagnetic brake apparatus 200 for parking is convenient to repair, and the motor apparatus 300 and the speed adjusting apparatus 400, which are required to ensure assembly accuracy, are not frequently disassembled because the electromagnetic brake apparatus 200 is required to repair, and the electromagnetic brake apparatus 200 can be repaired and replaced as a separate module. Similarly, because the wheel drive device 500 is positioned such that the hydraulic brake device 600 is also located outermost of the wheel drive device 100, such an arrangement also facilitates servicing and replacement of the hydraulic brake device 600. Adopt such design to make this application rational in infrastructure and be convenient for maintain.

As another design gist of the wheel side driving apparatus 100 of the present application, the electromagnetic braking apparatus 200 and the speed regulating apparatus 400 of the present application are designed to have a housing structure of the multiplex motor apparatus 300, which is advantageous in that the structure of the wheel side driving apparatus 100 is made more compact, and independent disassembly of each apparatus can be performed modularly without affecting other parts according to the maintenance requirement.

The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the invention. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.

Claims (10)

1. A wheel rim driving apparatus comprising:

wheel drive means for providing a mounting structure for mounting the wheel and driving the wheel means;

the motor device is used for converting electric energy into mechanical energy and driving the wheel driving device to rotate;

The speed regulating device is used for regulating the rotating speed of the wheel driving device relative to the motor device;

the electromagnetic braking device is used for converting electric energy into magnetic energy so as to indirectly prevent the wheel driving device from rotating;

the hydraulic braking device is used for converting potential energy into mechanical energy to directly prevent the wheel driving device from rotating;

wherein,,

the motor device comprises a motor stator, a motor rotor, a motor shell and a motor shaft; the motor rotor can rotate relative to the motor stator, the motor stator and the motor rotor are accommodated in the motor shell, and the motor shaft and the motor rotor form rotation-stopping connection; the motor shaft and the motor shell form rotary connection;

the speed regulating device comprises a planetary gear, a planetary carrier, an inner gear ring and a speed regulating shell; the planetary gear is rotatably connected to the planetary carrier, the planetary carrier and the speed regulation shell form rotary connection, and the planetary gear is meshed with the annular gear; the motor shaft is configured to have drive teeth capable of cooperating with the planetary gears;

The electromagnetic braking device comprises a first brake disc; the wheel driving device comprises a mounting flange and a second brake disc; the hydraulic brake device comprises at least one brake caliper for contacting the second brake disc;

the method is characterized in that:

the speed adjusting housing is configured with two mounting portions for mounting the brake caliper, the two mounting portions being disposed at different two circumferential positions relative to the motor shaft.

2. The wheel rim driving apparatus as set forth in claim 1, wherein:

the installation part is provided with more than two installation screw holes.

3. The wheel rim driving apparatus as set forth in claim 2, wherein:

the mounting screw holes of one of the mounting portions have the same extending direction.

4. A wheel rim driving apparatus as claimed in claim 3, wherein:

the mounting screw holes of the two different mounting parts have different extending directions.

5. The wheel rim driving apparatus as set forth in claim 4, wherein:

one of the mounting portions has two of the mounting screw holes.

6. The wheel rim driving apparatus as set forth in claim 4, wherein:

the mounting portion is further configured with a mounting groove recessed at least in a direction approaching the motor shaft.

7. The wheel rim driving apparatus of claim 6, wherein:

the mounting groove is arranged between the two mounting screw holes.

8. The wheel rim driving apparatus of claim 7, wherein:

the mounting portion includes at least two inclined wall surfaces, the inclined wall surfaces being parallel to an axis of the motor shaft, one inclined wall surface obliquely intersecting the other inclined wall surface.

9. The wheel rim driving apparatus of claim 8, wherein:

the mounting portion includes at least one straight wall surface perpendicular to an axis of the motor shaft, one of the straight wall surfaces being disposed between two of the inclined wall surfaces such that the mounting groove is configured in an open structure on the other side opposite to the straight wall surface.

10. The wheel rim driving apparatus of claim 9, wherein:

the mounting portion includes at least one arc wall surface provided between the two inclined wall surfaces such that the mounting groove is constructed in a closed structure in a direction approaching the motor shaft.

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