CN219382449U - Brake assembly, wheel drive device and vehicle - Google Patents

Abstract

The application discloses a brake assembly, a wheel side driving device and a vehicle. The brake assembly comprises a brake frame, a dynamic friction plate, a static friction plate and a brake component. The braking frame is arranged between the motor and the side part, the braking frame is arranged on the periphery of the supporting frame in a spacing sleeve manner, and the motor drives the supporting frame to rotate along the rotation axis relative to the braking frame. The dynamic friction plate is connected with the supporting frame. The static friction plate is connected with the braking frame. The dynamic friction plate and the static friction plate are arranged opposite to each other along the direction parallel to the rotation axis. The braking part is arranged between the braking frame and the supporting frame and is connected with the static friction plate. The brake member is configured to have a first state in which the driving static friction plate is in contact with the dynamic friction plate and a second state in which the driving static friction plate is spaced from the dynamic friction plate. The wheel side driving device comprises a braking assembly and a driving assembly. The vehicle includes a wheel drive device and a controller. The brake component is arranged inside the speed reducer shell, so that the space volume of the wheel side driving unit can be reduced, and the space utilization rate is improved.

Description

Brake assembly, wheel drive device and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a brake assembly, a wheel driving device and a vehicle.

Background

With the progress of electric drive technology, the structure of the whole vehicle drive system is gradually developed from centralized drive of a single power source to distributed drive of multiple power sources. The distributed driving is driven by a wheel side driving unit, wherein a motor is assembled on a wheel to drive the wheel individually, and the wheel side driving unit generally comprises a motor, a speed reducer, a brake and the like. Compared with a central driving unit, the novel full-ground multi-working-condition full-wheel motor driving system has the advantages that a main speed reducer and a differential mechanism are omitted, comprehensive transmission efficiency is high, the wheel-side motor driving system is convenient to realize electronic differential and torque coordination control, power dispersion is controllable, driving modes of the whole vehicle are various, and the passing performance of the whole vehicle under all-ground multi-working-condition is improved.

In the related art, the brake is generally disposed outside the reduction gear housing, but increases the radial dimension of the wheel side drive unit. In addition, a brake is arranged at the tail end of the motor, a transition support needs to be additionally arranged to be connected with the motor, and the axial size of the wheel driving unit can be increased. Therefore, the space utilization efficiency of the wheel side driving unit is low, and the whole vehicle arrangement is not facilitated.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the brake component which is arranged in the speed reducer shell, so that the space volume of the wheel side driving unit can be reduced, and the space utilization rate can be improved.

An embodiment of a first aspect of the present utility model proposes a brake assembly for braking a drive assembly, the drive assembly comprising a motor and a wheel carriage arranged in opposition, the motor driving the wheel carriage in rotation along a rotation axis, the wheel carriage comprising a support frame and a side portion, the brake assembly comprising:

the braking frame is arranged between the motor and the side part, the braking frame is sleeved on the periphery of the supporting frame at intervals, and the motor drives the supporting frame to rotate relative to the braking frame;

the dynamic friction plate is sleeved on the periphery of the support frame and is connected with the support frame;

the static friction plate is sleeved on the periphery of the supporting frame at intervals, is connected with the braking frame, and is arranged opposite to the static friction plate along the direction parallel to the rotation axis;

the braking component is arranged between the braking frame and the supporting frame and is connected with the static friction plate;

the brake component is configured to have a first state and a second state, wherein in the first state, the brake component drives the static friction plate to be in contact with the dynamic friction plate, and in the second state, the brake component drives the static friction plate to be spaced from the dynamic friction plate.

In some embodiments, the braking member includes an armature disposed opposite the static friction plate in a direction parallel to the rotation axis, an elastic member having an elastic force that brings the armature close to the static friction plate in a direction parallel to the rotation axis so as to bring the static friction plate into abutment with the dynamic friction plate, and an electromagnetic coil disposed on a side of the armature facing away from the static friction plate, the electromagnetic coil having a magnetic force that brings the armature close to the electromagnetic coil in a direction parallel to the rotation axis so as to space the static friction plate from the dynamic friction plate;

wherein in the first state the spring force is greater than the magnetic force and in the second state the magnetic force is greater than the spring force, the solenoid being configured to switch the braking member between the first state and the second state by taking different magnitudes of current.

In some embodiments, the brake assembly further comprises a brake gear ring and a yoke housing, the drive assembly comprises a planet carrier, the yoke housing is arranged on one side of the brake gear ring, which is away from the motor, the brake gear ring and the yoke housing are sleeved on the periphery of the planet carrier along the direction parallel to the rotation axis in a surrounding manner, a first accommodating cavity is formed, and the static friction plate, the armature and the elastic piece are all arranged in the first accommodating cavity.

In some embodiments, the brake assembly further includes a release lever including a first end and a second end opposite in a direction parallel to the rotation axis, the first end being connected to the release piston, the second end being connected to the armature, the release piston surrounding a periphery of the yoke housing and forming a second receiving cavity with the yoke housing, the yoke housing having a periphery provided with a first oil hole, the second receiving cavity being configured to enable the release piston to drive the armature away from the static friction plate in the direction parallel to the rotation axis after the first oil hole is used to obtain external liquid oil, so that the static friction plate is spaced from the dynamic friction plate.

In some embodiments, the armature includes a first through hole extending in a direction parallel to the rotation axis, the planet carrier penetrates through the first through hole, one side of the armature in the direction parallel to the rotation axis is provided with a plurality of first mounting holes and a plurality of second mounting holes at intervals along a circumferential direction surrounding the first through hole, the first mounting holes are used for accommodating the elastic pieces, and the second mounting holes are used for penetrating through the release pull rod.

An embodiment of a second aspect of the present utility model provides a wheel driving device, including a brake assembly as described in the above embodiment, and further including a driving assembly, where the driving assembly is connected to the brake assembly;

the driving assembly further comprises a planet carrier, the planet carrier comprises a third end and a fourth end which are oppositely arranged along the axis direction of the planet carrier, the wheel carrier comprises a mounting part positioned at the center of the wheel carrier, and the third end is directly connected with the mounting part.

In some embodiments, the driving assembly further comprises a sun gear and a plurality of planet gears, the sun gear is arranged at the center of the third end, the plurality of planet gears are arranged around the sun gear at intervals, the braking assembly comprises a reduction gear ring, the reduction gear ring is sleeved on the peripheries of the plurality of planet gears, and the sun gear, the planet gears and the reduction gear ring are meshed with each other to form a planetary reduction mechanism.

In some embodiments, the fourth end includes an end plate and a first wall surface that are oppositely arranged along the axis direction, the end plate is disposed on a side, away from the third end, of the first wall surface, the fourth end includes a plurality of mounting seats, the plurality of mounting seats are disposed at intervals along a circumferential direction surrounding the axis, two ends of each mounting seat along the axis direction are respectively connected with the end plate and the first wall surface, and adjacent mounting seats, the end plate and the first wall surface together form an accommodating space for accommodating a plurality of planet gears.

An embodiment of a third aspect of the present utility model provides a vehicle, including the wheel-side driving apparatus as described in the above embodiment, further including a controller for controlling a movement state of the wheel-side driving apparatus.

According to the embodiment, the beneficial effects of the utility model are as follows:

in the technical scheme of this application, support frame and braking frame all set up between motor and lateral part, and the periphery of support frame is located to the braking frame cover, and dynamic friction piece, static friction piece and braking part set up between braking frame and support frame, are equivalent to the main braking part setting of brake subassembly in the speed reducer casing inside promptly. Compared with the brake assembly arranged outside the speed reducer shell, the radial space of the wheel rim driving device can be effectively utilized. Compared with the mode that the brake component is arranged at the tail end of the motor and the transition support is additionally arranged, the axial space of the wheel edge driving device can be effectively utilized. In conclusion, the brake component of the scheme can realize effective braking, can effectively utilize the space volume of the wheel side driving device, promotes the overall structural compactness and is convenient for the whole vehicle arrangement.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a wheel side driving apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a wheel side drive according to one embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A; the brake component is in a first state, and the armature iron is abutted with the static friction plate;

FIG. 4 is an enlarged view of a portion of FIG. 2 at A; wherein the braking component is in a second state, and the armature is spaced from the static friction plate;

FIG. 5 is a partial enlarged view at B in FIG. 2; wherein a first receiving cavity and a relief pull rod are shown;

FIG. 6 is an exploded view of a wheel drive assembly according to one embodiment of the present utility model;

FIG. 7 is an exploded view of a portion of a brake assembly according to one embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a portion of a brake assembly according to one embodiment of the utility model;

FIG. 9 is an enlarged view of a portion of FIG. 8 at C, showing a second receiving chamber;

FIG. 10 is a schematic view of a planet carrier and carrier of an embodiment of the utility model;

FIG. 11 is a schematic illustration of a sun gear and planet gear assembly to a planet carrier according to one embodiment of the utility model;

FIG. 12 is a schematic exploded view in cross-section of a portion of a brake assembly according to one embodiment of the utility model, wherein both the dynamic and static friction plates are provided.

In the drawings, each reference numeral denotes:

wheel drive means 10;

a drive assembly 100;

a motor 110; a wheel frame 120;

a support frame 121; a carrier 1211; a third end 1212; a fourth end 1213; end plate 1214; a first wall 1215; a mounting base 1216;

a side 122; a mounting portion 123; a sun gear 124; a first sun gear bearing 1241; a second sun gear bearing 1242; sun gear end cap 1243; sun gear seal 1244; planetary gears 125; planetary axles 1251; a rim 126;

a first carrier end cap 130; a second carrier end cap 140; a carrier seal 150; a first planet carrier bearing 160; a second planet carrier bearing 170;

a brake assembly 200; a brake frame 210;

a reduction gear ring 211; braking the ring gear 212; a yoke housing 213; a peripheral portion 2131; a first oil hole 2132; a first receiving chamber 214;

a dynamic friction plate 220; friction plate baffles 221; a static friction plate 230;

a brake member 240;

an armature 241; a first through hole 2411; a first mounting hole 2412; a second mounting hole 2413; an elastic member 242; a solenoid 243; a relief pull rod 244; a first end 2441; a second end 2442; a relief piston 245; a second accommodation chamber 246;

a driving unit mounting bracket 300;

the rotation axis direction X.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is included in the embodiment of the present utility model, the directional indication is merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or", "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B ", including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In the related art, the brake is generally disposed outside the reduction gear housing, but increases the radial dimension of the wheel side drive unit. In addition, a brake is arranged at the tail end of the motor, a transition support needs to be additionally arranged to be connected with the motor, and the axial size of the wheel driving unit can be increased. Therefore, the space utilization efficiency of the wheel side driving unit is low, and the whole vehicle arrangement is not facilitated.

In view of this, a brake assembly 200 according to an embodiment of the present utility model is described below with reference to fig. 1 to 12. The brake assembly 200 of the present embodiment may be applied to a hybrid vehicle, a fuel-powered vehicle, or a pure electric vehicle, and may also be applied to a rail transit vehicle, etc.

The brake assembly 200 may brake the drive assembly 100 in the vehicle. The drive assembly 100 generally includes a motor 110 and a wheel carriage 120 arranged in opposition, with reference to fig. 1 and 2. The wheel frame 120 may be a tired wheel or a wheel on which no tire is mounted. The motor 110 may drive the wheel carrier 120 to rotate along the rotation axis, i.e. the motor 110 is arranged opposite the wheel carrier 120 along the rotation axis. For convenience of description and understanding, the rotation axis direction X may refer to a left-to-right direction or a right-to-left direction with reference to a state in which the driving assembly 100 and the brake assembly 200 are mounted to the vehicle body, and this embodiment takes the rotation axis direction X as an example.

The wheel frame 120 includes a support frame 121 and a side 122, referring to fig. 2 and 10. It should be noted that the supporting frame 121 may refer to a portion connected to the wheel body of the wheel frame 120, and it is understood that the supporting frame 121 rotates along with the motor 110. In some embodiments, the support 121 may refer to a planet carrier 1211. In other embodiments, the support 121 may refer to a portion of the motor 110 that is capable of driving the relative motion of the wheels. It should be noted that, each portion of the support frame 121 may be integrally formed, or may be formed by combining and connecting structural members of each portion. And may be specific to the actual situation. The side 122 refers to the portion of the side of the wheel carriage 120 facing away from the support frame 121. Referring to fig. 2 and 10, the side 122 may refer to a portion of the right side of the wheel frame 120.

Specifically, the brake assembly 200 includes a brake spider 210, a dynamic friction plate 220, a static friction plate 230, and a brake member 240, referring to fig. 2 to 7 and 12. The brake carriage 210 is disposed between the motor 110 and the side 122, see fig. 2. Brake spider 210 refers to a relatively stationary, load bearing portion of brake assembly 200. The brake carrier 210 in some embodiments of the present application is exemplified by a connection combination of the parts of the ring gear 211, the ring gear 212, and the yoke housing 213, etc., referring to fig. 2. The brake frame 210 is spaced around the support frame 121, and the spacing therebetween means that a gap space exists between the brake frame 210 and the support frame 121 to accommodate other components, as shown in fig. 2 to 5. The motor 110 may drive the support frame 121 to rotate relative to the brake frame 210.

The movable friction plate 220 is sleeved on the outer periphery of the supporting frame 121 and is connected with the supporting frame 121, and refer to fig. 2, 7 and 12. It will be appreciated that the dynamic friction plate 220 is located between the support frame 121 and the brake frame 210 and can move with the support frame 121, referring to fig. 2 to 5. The static friction plate 230 is sleeved on the outer periphery of the supporting frame 121 at intervals and is connected with the braking frame 210. Here, the spacer finger static friction plate 230 may be spaced from the dynamic friction plate 220. The dynamic friction plate 220 is disposed opposite the static friction plate 230 in a direction parallel to the rotational axis. It is understood that the static friction plate 230 may be disposed between the support frame 121 and the brake frame 210. The friction force may be generated by the relative movement of the dynamic friction plate 220 and the static friction plate 230, which are abutted against each other.

The braking member 240 is disposed between the braking frame 210 and the supporting frame 121, and the braking member 240 is connected to the static friction plate 230. The brake member 240 is configured to have a first state and a second state. In the first state, the braking member 240 drives the static friction plate 230 to abut against the dynamic friction plate 220, that is, generates friction to brake the driving unit 100, and fig. 2 and 3 are referred to. In the second state, the braking part 240 drives the static friction plate 230 to be spaced apart from the dynamic friction plate 220, i.e., a braking canceling effect can be achieved, referring to fig. 2 and 4.

In the technical solution of the present application, the supporting frame 121 and the braking frame 210 are both disposed between the motor 110 and the side portion 122, the braking frame 210 is sleeved on the outer periphery of the supporting frame 121, and the dynamic friction plate 220, the static friction plate 230 and the braking component 240 are disposed between the braking frame 210 and the supporting frame 121, i.e. the main braking portion corresponding to the braking assembly 200 is disposed inside the speed reducer housing. Compared with the brake assembly 200 arranged outside the speed reducer housing, the radial space of the wheel side driving device 10 can be effectively utilized. Compared with the mode that the brake assembly 200 is arranged at the tail end of the motor 110 and a transition support is additionally arranged, the scheme can effectively utilize the axial space of the wheel driving device 10. In summary, the brake assembly 200 of the present embodiment can not only realize effective braking, but also effectively utilize the space volume of the wheel side driving device 10, promote overall structural compactness, and facilitate the whole vehicle arrangement.

The brake member 240 includes an armature 241, an elastic piece 242, and a solenoid 243, referring to fig. 2 to 4 and 7. The armature 241 may be attracted by a magnetic force. The armature 241 is disposed opposite the static friction plate 230 in a direction parallel to the rotational axis, it being understood that the armature 241 is disposed on a side of the static friction plate 230 facing away from the dynamic friction plate 220. The elastic member 242 has an elastic force that brings the armature 241 close to the static friction plate 230 in a direction parallel to the rotation axis so that the static friction plate 230 abuts against the dynamic friction plate 220. In some embodiments, the elastic member 242 may be a compression spring, and in other embodiments, the elastic member 242 may be a tension spring, as the case may be. The electromagnetic coil 243 is disposed on a side of the armature 241 facing away from the static friction plate 230, and the electromagnetic coil 243 has a magnetic force that brings the armature 241 close to the electromagnetic coil 243 in a direction parallel to the rotation axis so as to space the static friction plate 230 from the dynamic friction plate 220. It will be appreciated that the electromagnetic coil 243 generates a corresponding magnetic force upon application of an electrical current.

In the first state, the elastic force is greater than the magnetic force, that is, the armature 241 approaches the static friction plate 230 along the direction parallel to the rotation axis, and presses the static friction plate 230 to abut against the dynamic friction plate 220 to generate friction force, so that the driving assembly 100 brakes, referring to fig. 3. In the second state, the magnetic force is greater than the elastic force, that is, the armature 241 approaches the electromagnetic coil 243 in a direction parallel to the rotation axis, and the static friction plate 230 loses the external pressure to be spaced from the dynamic friction plate 220, resulting in an effect of releasing braking, referring to fig. 4. Through the electromagnetic braking mode, the wheel side driving device 10 can omit related hydraulic and pneumatic braking systems, is beneficial to the optimization of the whole vehicle system and reduces the production cost.

In some embodiments, the brake assembly 200 further includes a brake ring gear 212 and a yoke housing 213, see fig. 2 and 7. The drive assembly 100 includes a carrier 1211. The yoke housing 213 is provided on a side of the brake ring gear 212 facing away from the motor 110, and the brake ring gear 212 and the yoke housing 213 are circumferentially fitted around an outer periphery of the carrier 1211 in a direction parallel to the rotational axis and form a first accommodation chamber 214. The static friction plate 230, the armature 241 and the elastic member 242 are disposed in the first accommodating chamber 214, see fig. 5. The above arrangement makes the main part of the brake assembly 200 form a fully sealed structure, which can avoid invasion of sundries, reduce external interference and greatly improve the braking stability of the brake assembly 200.

The brake assembly 200 also includes a release lever 244 and a release piston 245, see fig. 2-5. The relief tension rod 244 includes first and second ends 2441, 2442 that are opposite in a direction parallel to the axis of rotation. The first end 2441 is coupled to the relief piston 245 and the second end 2442 is coupled to the armature 241. The relief piston 245 is circumferentially sleeved on the outer periphery of the yoke housing 213 and forms a second accommodation chamber 246 with the yoke housing 213, the yoke housing 213 has a peripheral portion 2131, the peripheral portion 2131 is provided with a first oil hole 2132, and the second accommodation chamber 246 is configured to enable the relief piston 245 to drive the armature 241 away from the static friction plate 230 in a direction parallel to the rotation axis after obtaining external liquid oil through the first oil hole 2132, so that the static friction plate 230 is spaced from the dynamic friction plate 220, referring to fig. 8 and 9. The release piston 245 and the release pull rod 244 can release the braking pressing force of the armature 241 through external hydraulic oil when the electromagnetic coil 243 fails to cause braking locking, so that the driving assembly 100 can normally operate, and related maintenance on the braking assembly 200 is facilitated.

In some embodiments, the armature 241 includes a first through hole 2411 extending in a direction parallel to the rotational axis, and the carrier 1211 is threaded through the first through hole 2411, referring to fig. 7. A plurality of first mounting holes 2412 and a plurality of second mounting holes 2413 are provided at intervals along the circumferential direction surrounding the first through hole 2411 on one side of the armature 241 in the direction parallel to the rotation axis, the first mounting holes 2412 are used for accommodating the elastic member 242, and the second mounting holes 2413 are used for penetrating the release rod 244. The elastic member 242 is provided in plurality. It is understood that the number of the elastic pieces 242 corresponds to the number of the first mounting holes 2412. The plurality of elastic members 242 are disposed at intervals around the circumference of the carrier 1211 such that the armature 241 can be subjected to a uniform pressing force and the brake assembly 200 can obtain a large braking moment with a small pressing force. The respective elastic pieces 242 are connected to the yoke housing 213 and the armature 241 at both ends thereof in a direction parallel to the rotation axis, respectively.

The utility model also provides a wheel edge driving device 10. The wheel side drive 10 comprises a brake assembly 200 according to any of the embodiments described above, and further comprises a drive assembly 100, the drive assembly 100 being connected to the brake assembly 200. The drive assembly 100 includes a carrier 1211, the carrier 1211 being one of the primary members of the planetary gear set. The carrier 1211 includes a third end 1212 and a fourth end 1213 that are oppositely disposed in the axial direction. The wheel frame 120 includes a mounting portion 123 at the center of the wheel frame 120, and a third end 1212 is directly connected to the mounting portion 123. The mounting portion 123 of the embodiment of the present utility model takes a combination of a through hole and a plurality of mounting holes provided along the circumferential direction of the through hole as an example, referring to fig. 2 and 10.

In some embodiments, the third end 1212 of the carrier 1211 may be directly connected to the mounting portion 123 of the wheel carrier 120, and compared with the manner of connecting the carrier 1211 to the wheel hub and then connecting the wheel hub to the wheel, the present embodiment directly removes the hub structure, that is, the third end 1212 of the carrier 1211 is equivalent to replacing the structural function of the hub, so as to save the occupied space of the hub in the wheel, thereby greatly reducing the space volume of the wheel, improving the compactness of the wheel driving device 10, increasing the transmission ratio between the carrier 1211 and the wheel, and improving the transmission efficiency.

The motor 110 of the wheel side driving apparatus 10 is mounted on the reduction gear ring 211 through the spigot positioning. The motor 110 has a torque output shaft with an internally splined configuration and the sun gear 124 has an externally splined configuration, such that the sun gear 124 can transmit torque by assembling the internal and external splines.

In some embodiments, the driving assembly 100 further includes a sun gear 124 and a plurality of planetary gears 125, the sun gear 124 is disposed at the center of the third end 1212, the plurality of planetary gears 125 are disposed around the sun gear 124 at intervals, the braking assembly 200 includes a reduction gear ring 211, the reduction gear ring 211 is sleeved on the outer circumference of the plurality of planetary gears 125, and the sun gear 124, the planetary gears 125 and the reduction gear ring 211 are meshed with each other to form a planetary reduction mechanism, referring to fig. 11. This embodiment takes the example of three sets of planets 125.

Three groups of planetary gears 125 arranged at even intervals in the circumferential direction of the rotation axis direction X may be assembled on the planetary carrier 1211 through planetary gear 125 shafts, and needle bearings may be installed between the planetary gears 125 and the planetary gear 125 shafts, so that the friction force of rotation of the planetary gears 125 can be reduced, the abrasion of the planetary gears 125 can be reduced, and the service life of the rim driving apparatus 10 can be prolonged.

The sun gear 124 is supported on the carrier 1211 at one end parallel to the rotation axis direction X, and specifically, the third end 1212 may be supported on the second carrier end cap 140 through a first sun gear bearing 1241, and the second carrier end cap 140 is fixedly connected to the carrier 1211. The other end of the sun gear 124 in the direction parallel to the rotation axis line direction X is supported on the reduction gear ring 211. Specifically, the fourth end 1213 is supported to the reduction gear ring 211 by the second sun gear bearing 1242. Referring to fig. 2, the above-mentioned connection structure of the sun gear 124 may form a first rotary kinematic pair, which can reduce the space volume of the wheel side driving apparatus 10 and promote the overall structural compactness.

In some embodiments, referring to fig. 2 and 6, the wheel-side driving apparatus 10 further includes a sun gear end cover 1243, where the sun gear end cover 1243 is sleeved on an outer periphery of one end of the sun gear 124 near the reduction gear ring 211, and the sun gear end cover 1243 is used to adjust the position of the first rotary kinematic pair along the axis direction X (i.e. adjust the axial play of the first rotary kinematic pair).

The fourth end 1213 of the carrier 1211 includes an end plate 1214 and a first wall 1215 that are oppositely disposed along the rotational axis direction X. Referring to fig. 10 and 11, the end plate 1214 is disposed on a side of the first wall 1215 facing away from the first end 2441, and this embodiment takes the case where the end plate 1214 is disposed on the left side and the first wall 1215 is disposed on the right side. The fourth end 1213 further includes a plurality of mounting blocks 1216, and it will be appreciated that the mounting blocks 1216 may be provided in two, three, four, etc., and this embodiment is exemplified by the provision of three mounting blocks 1216.

The plurality of mounts 1216 are circumferentially spaced about the axis. Both ends of each mount 1216 in the rotation axis direction X are connected to the end plate 1214 and the first wall 1215, respectively. Adjacent mounting blocks 1216 cooperate with end plates 1214 and first wall 1215 to form a receiving space for receiving a plurality of planets 125. The number of the planetary gears 125 is identical to the number of the fourth mounting seats 1216.

In some embodiments, referring to fig. 2, the reduction gear ring 211, the brake gear ring 212, and the yoke housing 213 may constitute a stationary bearing portion. Both ends of the brake ring gear 212 in the rotation axis direction X are connected to the reduction ring gear 211 and the yoke housing 213, respectively. The stationary carrier part is supported on a carrier 1211. Since the carrier 1211 is connected to the wheels, the carrier 1211 is allowed to transmit torque and also to withstand the vertical force of the wheels, thereby improving the stability of the movement of the wheel side drive 10.

It will be appreciated that the wheel drive 10 may also include a drive unit mount 300, and referring to fig. 1, 2 and 6, the stationary bearing portion may be rigidly connected to the drive unit mount 300 such that the drive unit mount 300 may bear the vertical forces to which the planet carrier 1211 is subjected.

The following describes the operation of the wheel drive 10 of some embodiments.

Driving principle: the motor 110 is transmitted to the sun gear 124 via the internal splines of its torque output shaft. The sun gear 124 drives the planetary gears 125 to rotate around the reduction gear ring 211, and the planetary gears 125 drive the carrier 1211 to rotate around the reduction gear ring 211 to output torque to the wheels, thereby realizing the driving function of the rim driving apparatus 10.

The braking principle: when the electromagnetic coil 243 is not energized, the elastic member 242 sequentially presses the armature 241, the static friction plate 230, the movable friction plate 220, and the friction plate shutter 221 in the rotation axis direction X, so that friction force is generated between the movable friction plate 220 and the static friction plate 230, and braking torque is formed. When current is supplied to the electromagnetic coil 243, a magnetic field is generated, and as the current increases, the attractive force of the magnetic field on the armature 241 gradually balances with the pressing force of the elastic member 242, so that the friction plates are loosened, and the braking torque is reduced from the maximum value to zero. When the passive electromagnetic brake is driven, the braking force is released by electrifying, and when the brake is braked, the braking force is controlled by controlling the current of the electromagnetic coil 243, and the braking force is maximum when the current is zero.

Bearing principle: the vertical force, longitudinal force and transverse force between the wheels and the running friction surface are transmitted to the stationary bearing part of the driving unit consisting of the reduction gear ring 211, the brake gear ring 212 and the yoke housing 213 through the planet carrier 1211 and the first planet carrier bearing 160 and the second planet carrier bearing 170 at the two ends thereof, and then transmitted to the driving unit mounting support 300 rigidly connected with the stationary bearing part.

Lubrication sealing principle: the inner cavity is sealed through a planet carrier sealing ring 150 and a second sun gear bearing 1242, an oil filling hole and an oil level observation hole are formed in the second planet carrier end cover 140, and an air permeable cap mounting hole and an oil drain bolt mounting hole are respectively formed in the upper portion and the bottom of the reduction gear ring 211.

The present utility model further provides a vehicle including the wheel driving apparatus 10 according to the above embodiment, and further includes a controller for controlling the movement state of the wheel driving apparatus 10. The vehicle of the present embodiment, because of adopting the planet carrier 1211 to be directly connected with the wheel carrier 120, saves the structure of the hub, can reduce the space volume of the wheel driving device 10, and improves the transmission efficiency and the compactness of the whole structure. Meanwhile, as the brake assembly 200 of the wheel side driving device 10 is arranged inside the speed reducer shell, the whole space volume can be reduced, the whole structure compactness is improved, and the whole vehicle arrangement is convenient.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A brake assembly for braking a drive assembly, the drive assembly including a motor and a wheel carriage arranged in opposition, the motor driving the wheel carriage to rotate along an axis of rotation, the wheel carriage including a support frame and a side portion, the brake assembly comprising:

the braking frame is arranged between the motor and the side part, the braking frame is sleeved on the periphery of the supporting frame at intervals, and the motor drives the supporting frame to rotate relative to the braking frame;

the dynamic friction plate is sleeved on the periphery of the support frame and is connected with the support frame;

the static friction plate is sleeved on the periphery of the supporting frame at intervals, is connected with the braking frame, and is arranged opposite to the static friction plate along the direction parallel to the rotation axis;

the braking component is arranged between the braking frame and the supporting frame and is connected with the static friction plate;

the brake component is configured to have a first state and a second state, wherein in the first state, the brake component drives the static friction plate to be in contact with the dynamic friction plate, and in the second state, the brake component drives the static friction plate to be spaced from the dynamic friction plate.

2. A brake assembly according to claim 1, wherein,

the braking component comprises an armature, an elastic piece and an electromagnetic coil, wherein the armature and the static friction plate are oppositely arranged along the direction parallel to the rotation axis, the elastic piece has an elastic force for enabling the armature to be close to the static friction plate along the direction parallel to the rotation axis so as to enable the static friction plate to be abutted against the dynamic friction plate, the electromagnetic coil is arranged on one side, away from the static friction plate, of the armature, and the electromagnetic coil has a magnetic force for enabling the armature to be close to the electromagnetic coil along the direction parallel to the rotation axis so as to enable the static friction plate to be spaced from the dynamic friction plate;

wherein in the first state the spring force is greater than the magnetic force and in the second state the magnetic force is greater than the spring force, the solenoid being configured to switch the braking member between the first state and the second state by taking different magnitudes of current.

3. A brake assembly according to claim 2, wherein,

the brake assembly further comprises a brake gear ring and a magnetic yoke shell, the drive assembly comprises a planet carrier, the magnetic yoke shell is arranged on one side, deviating from the motor, of the brake gear ring, the brake gear ring and the magnetic yoke shell are sleeved on the periphery of the planet carrier along the direction parallel to the rotation axis in a surrounding mode, a first accommodating cavity is formed, and the static friction plate, the armature and the elastic piece are all arranged in the first accommodating cavity.

4. A brake assembly according to claim 3, wherein,

the brake assembly further comprises a release pull rod and a release piston, the release pull rod comprises a first end and a second end which are opposite along the direction parallel to the rotation axis, the first end is connected with the release piston, the second end is connected with the armature, the release piston is sleeved on the periphery of the magnetic yoke shell in a surrounding mode and forms a second accommodating cavity with the magnetic yoke shell, the magnetic yoke shell is provided with a periphery portion, the periphery portion is provided with a first oil hole, the second accommodating cavity is configured to enable the release piston to drive the armature to be far away from the static friction plate along the direction parallel to the rotation axis after the first oil hole is used for obtaining external liquid oil, and the static friction plate is spaced from the dynamic friction plate.

5. A brake assembly according to claim 4, wherein,

the armature includes along be on a parallel with the direction of axis of rotation extends first through-hole, the planet carrier wears to establish first through-hole, one side of armature along be on a parallel with the direction of axis of rotation is along encircling first through-hole's circumference interval is provided with a plurality of first mounting holes and a plurality of second mounting hole, first mounting hole is used for the accommodation the elastic component, the second mounting hole is used for wearing to establish alleviate the pull rod.

6. A brake assembly according to claim 4, wherein,

the elastic pieces are arranged at intervals in the circumferential direction of the planet carrier, and two ends of each elastic piece in the direction parallel to the rotation axis are respectively connected with the magnet yoke shell and the armature.

7. A wheel drive comprising a brake assembly according to any one of claims 1 to 6, and a drive assembly connected to the brake assembly;

the driving assembly further comprises a planet carrier, the planet carrier comprises a third end and a fourth end which are oppositely arranged along the axis direction of the planet carrier, the wheel carrier comprises a mounting part positioned at the center of the wheel carrier, and the third end is directly connected with the mounting part.

8. The wheel rim driving apparatus as claimed in claim 7, wherein,

the driving assembly further comprises a sun gear and a plurality of planet gears, the sun gear is arranged at the center of the third end, the planet gears are arranged around the sun gear at intervals, the braking assembly comprises a reduction gear ring, the reduction gear ring is sleeved on the periphery of the planet gears, and the sun gear, the planet gears and the reduction gear ring are meshed with each other to form a planetary reduction mechanism.

9. The wheel rim driving apparatus as claimed in claim 7, wherein,

the fourth end comprises an end plate and a first wall surface which are oppositely arranged along the axis direction, the end plate is arranged on one side, deviating from the third end, of the first wall surface, the fourth end comprises a plurality of mounting seats, the mounting seats are arranged at intervals along the circumferential direction surrounding the axis, the two ends of each mounting seat along the axis direction are respectively connected with the end plate and the first wall surface, and the adjacent mounting seats, the end plate and the first wall surface jointly form a containing space for containing a plurality of planet gears.

10. A vehicle comprising a wheel drive arrangement as claimed in any one of claims 7 to 9, the vehicle further comprising a controller for controlling the state of motion of the wheel drive arrangement.