CN116442763A - Wheel driving device and vehicle - Google Patents

Abstract

The invention discloses a wheel driving device and a vehicle. The wheel edge driving device comprises a planet carrier and a wheel carrier. The carrier includes a first end and a second end disposed opposite each other along an axial direction thereof. The wheel frame comprises a mounting part positioned at the center of the wheel frame. Wherein the first end is directly connected with the mounting portion. The vehicle comprises the wheel edge driving device and a controller, wherein the wheel edge driving device is implemented as described above, and the controller is used for controlling the motion state of the wheel edge driving device. The wheel side driving device and the planet carrier in the vehicle are directly connected with the wheels, so that the hub structure can be omitted, the space volume of the wheels is reduced, and the transmission efficiency and the overall structural compactness are improved.

Description

Wheel driving device and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a wheel side 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 wheel side driving unit is usually connected to the hub by using the planet carrier, and the hub is connected with the wheel to realize the corresponding driving function, but the hub occupies the radial and axial space of the wheel due to the structure of the hub, so that the space volume of the wheel is increased, and the transmission ratio between the planet carrier and the wheel is reduced, thereby influencing the transmission efficiency.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the wheel edge driving device, the planet carrier of the wheel edge driving device is directly connected with the wheel, the hub structure can be omitted, the space volume of the wheel is reduced, and the transmission efficiency and the overall structural compactness are improved.

The invention further provides a vehicle.

An embodiment of a first aspect of the present invention proposes a wheel rim driving apparatus comprising:

a carrier including a first end and a second end arranged opposite to each other in an axial direction thereof;

the wheel frame comprises an installation part positioned at the center of the wheel frame;

wherein the first end is directly connected with the mounting portion.

In some embodiments, the wheel carrier includes a rim, the mounting portion is connected to one side of the rim along the axis direction, the mounting portion has a first through hole extending along the axis direction, the mounting portion is provided with a plurality of first mounting holes along a circumferential interval surrounding the first through hole, the planet carrier includes a second through hole penetrating itself along the axis direction, the second through hole has a circumferential wall, the circumferential wall at the first end is provided with a plurality of bosses along the circumferential interval surrounding the axis, each boss has a second mounting hole, an axis of the plurality of first mounting holes respectively coincides with an axis of the corresponding plurality of second mounting holes, and the wheel rim driving device includes a plurality of first bolts correspondingly penetrating the plurality of first mounting holes and the plurality of second mounting holes to connect the planet carrier with the wheel carrier.

In some embodiments, the second 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 of the first wall surface that faces away from the first end, the second 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.

In some embodiments, the wheel side driving device further comprises a brake assembly, the brake assembly comprises a speed reduction gear ring, a brake gear ring and a magnetic yoke shell, two ends of the brake gear ring along the axis direction are respectively connected with the speed reduction gear ring and the magnetic yoke shell, and the brake assembly is supported on the planet carrier.

In some embodiments, the second end is provided with a sun gear having third and fourth ends arranged opposite in the axial direction, the third end being supported to the planet carrier and the fourth end being supported to the reduction gear ring.

In some embodiments, the hub driving device further includes a plurality of planetary gears, the plurality of planetary gears are disposed around the sun gear at intervals in a circumferential direction, the reduction gear ring is sleeved on the outer circumferences of the plurality of planetary gears, and the sun gear, the planetary gears and the reduction gear ring are meshed with each other to form a planetary reduction mechanism.

In some embodiments, the brake assembly further comprises a brake friction plate disposed between the planet carrier and the brake ring gear, the brake friction plate comprising a dynamic friction plate and a static friction plate, the static friction plate disposed on a side of the dynamic friction plate facing away from the sun gear, the dynamic friction plate being superimposed with the static friction plate along the axial direction.

In some embodiments, the wheel side driving device further comprises a sun gear end cover, wherein the sun gear end cover is sleeved on the periphery of the fourth end, and the sun gear end cover is used for adjusting the position of the sun gear along the axis direction.

In some embodiments, the wheel side driving device further comprises a first planet carrier end cover sleeved on the periphery of the first end so as to adjust the position of the planet carrier along the axis direction.

An embodiment of a second aspect of the present invention provides a vehicle, including the wheel edge driving device according to the above embodiment, further including a controller for controlling a movement state of the wheel edge driving device.

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

in the technical scheme of this application, the first end of planet carrier can be directly be connected with the central part of wheel carrier, compare in being connected in wheel hub through the planet carrier, wheel hub is with the mode of wheel connection again, this scheme directly removes the wheel hub structure, be equivalent to the structural function who utilizes the first end of planet carrier to replace wheel hub promptly, can save wheel in the wheel hub's occupation space, thereby can reduce the space volume of wheel by a wide margin, improve wheel limit drive arrangement's compact structure, and increase the transmission ratio between planet carrier and the wheel, promote transmission efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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 invention, 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 invention;

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

FIG. 3 is an exploded view of a wheel drive assembly according to one embodiment of the present invention;

FIG. 4 is an exploded view of a planet carrier and carrier according to one embodiment of the present invention;

FIG. 5 is an exploded and cross-sectional schematic view of a planet carrier, a wheel carrier, and a first bolt according to one embodiment of the invention;

fig. 6 is a schematic view of the assembled state of the planet, sun and planet carrier of an embodiment of the invention.

In the drawings, each reference numeral denotes:

wheel drive means 10;

a carrier 100;

a first end 110; a peripheral wall 111; a boss 112; a second mounting hole 113; a first bolt 114; first, the

A planet carrier end cap 115;

a second end 120; an end plate 121; a first wall 122; a mounting base 123; a sun gear 124; a third end 1241; a fourth end 1242; sun gear end cap 1243; a first sun gear bearing 1244; a second sun gear bearing 1245; sun gear seal 1246; planetary gears 125; planetary axles 1251; second row

A spider end cap 126;

a second through hole 130;

a carrier seal ring 140; a first planet carrier bearing 141; a second planet carrier bearing 142;

a wheel frame 200; a mounting portion 210; a first through hole 211; a first mounting hole 212; a rim 220;

a brake assembly 300; a reduction gear ring 310; braking the ring gear 320; a yoke housing 330; a dynamic friction plate 340; a static friction plate 350; a brake spring 360; a solenoid 370; an armature 380; friction plate baffle 390;

the release lever 400; a relief piston 410;

a motor 500;

a driving unit mounting stand 600;

the axis direction X.

The achievement of the objects, functional features and advantages of the present invention 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 invention 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 invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

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 invention, 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 invention, 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 invention.

In the related art, the wheel side driving unit is usually connected to the hub by using the planet carrier, and the hub is connected with the wheel to realize the corresponding driving function, but the hub occupies the radial and axial space of the wheel due to the structure of the hub, so that the space volume of the wheel is increased, and the transmission ratio between the planet carrier and the wheel is reduced, thereby influencing the transmission efficiency.

In view of this, a wheel side driving apparatus 10 according to an embodiment of the present invention is described below with reference to fig. 1 to 6. The wheel side driving apparatus 10 of the present embodiment can be applied to a hybrid vehicle, a fuel-powered vehicle, and a pure electric vehicle, and also can be applied to a rail transit vehicle bogie driving unit, and the like. Specifically, the wheel side drive apparatus 10 includes a carrier 100 and a carrier 200.

The planet carrier 100 is one of the main components of a planetary gear. Referring to fig. 2, 4 to 6, the carrier 100 includes a first end 110 and a second end 120 disposed opposite in an axial direction X thereof. It is understood that the axial direction X may refer to a direction parallel or coincident with the central axis of the planet carrier 100. For convenience of description and understanding, the axial direction X may refer to a left-to-right direction or a right-to-left direction with reference to a state in which the carrier 100 is mounted to the vehicle body, and this embodiment takes the axial direction X as an example.

The wheel frame 200 may be a tired wheel or a wheel on which no tire is mounted. Referring to fig. 1 to 5, the wheel frame 200 includes a mounting portion 210 at the center of the wheel frame 200. The mounting portion 210 of the embodiment of the present invention 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.

In the technical scheme of this application, the first end 110 of planet carrier 100 can be directly connected with the central part of wheel carrier 200, compare in being connected in the wheel hub through planet carrier 100, the wheel hub is connected with the mode of wheel again, this scheme directly removes the wheel hub structure, be equivalent to the structural function who utilizes the first end 110 of planet carrier 100 to replace wheel hub promptly, can save the occupation space of wheel hub in the wheel, thereby can reduce the space volume of wheel by a wide margin, improve the compactibility of structure of wheel limit drive arrangement 10, and increase the transmission ratio between planet carrier 100 and the wheel, promote transmission efficiency.

The wheel frame 200 includes a rim 220, and the rim 220 may be disposed around the circumference of the wheel frame 200, referring to fig. 4 and 5. The mounting portion 210 is connected to one side of the rim 220 in the axial direction X. The mounting portion 210 may be connected to the left side of the rim 220 or to the right side of the rim 220. In this embodiment, the mounting portion 210 is connected to the left side, as an example, see fig. 2. It will be appreciated that the mounting portion 210 should be on the same side as the vehicle body when the wheel frame 200 is assembled with the vehicle body. It should be noted that, the axis direction X may refer to a direction parallel to the axis direction X of the planet carrier 100, and the meaning of the axis direction X is the same in the following description, and will not be described in detail.

The mounting portion 210 has a first through hole 211 extending in the axis direction X, see fig. 4 and 5. The mounting portion 210 is provided with a plurality of first mounting holes 212 at intervals in a circumferential direction around the first through hole 211. It is understood that the intervals between the adjacent first mounting holes 212 may be uniform intervals or non-uniform intervals, and this embodiment is exemplified by uniform intervals.

The carrier 100 includes a second through hole 130 penetrating itself in the axis direction X, the second through hole 130 having a peripheral wall 111, referring to fig. 4 and 5. The peripheral wall 111 at the first end 110 is provided with a plurality of bosses 112 spaced circumferentially around the axis. Each boss 112 has a second mounting hole 113, and the second mounting holes 113 of the bosses 112 extend in the axis direction X. The second mounting hole 113 may be a blind hole or a through hole, and this embodiment takes a blind hole as an example.

The axes of the plurality of first mounting holes 212 are respectively coincident with the axes of the corresponding plurality of second mounting holes 113. The wheel side driving apparatus 10 includes a plurality of first bolts 114, and a plurality of first mounting holes 212 and a plurality of second mounting holes 113, respectively, penetrating the plurality of first bolts 114, may be connected to integrally connect the carrier 100 and the carrier 200. The whole assembly is stable and the assembly and disassembly are quick, so that the wheel frame 200 is convenient to replace and related maintenance is convenient.

The second end 120 of the carrier 100 includes an end plate 121 and a first wall surface 122 that are oppositely disposed in the axial direction X. Referring to fig. 4 and 6, the end plate 121 is disposed on a side of the wall surface facing away from the first end 110, and in this embodiment, the end plate 121 is disposed on the left side, and the first wall surface 122 is disposed on the right side. The second end 120 further includes a plurality of mounting seats 123, and it will be understood that the second mounting seats 123 may be two, three, four, etc., and in this embodiment, three second mounting seats 123 are provided as an example.

The plurality of mounting seats 123 are spaced circumferentially about the axis. Both ends of each mount 123 in the axis direction X are connected to the end plate 121 and the first wall surface 122, respectively. The adjacent mounting base 123 forms a receiving space together with the end plate 121 and the first wall surface 122 for receiving the plurality of planetary gears 125. The number of the planetary gears 125 is identical to the number of the second mounting seats 123.

In some embodiments, referring to fig. 2 and 3, the wheel side drive apparatus 10 includes a brake assembly 300, the brake assembly 300 including a reduction gear ring 310, a brake gear ring 320, and a yoke housing 330, which may constitute a stationary bearing portion. Both ends of the brake ring gear 320 in the axis direction X are connected to the reduction ring gear 310 and the yoke housing 330, respectively. The brake assembly 300 is supported on the carrier 100. The carrier 100 is connected to the wheels, so that the carrier 100 can transmit torque and bear the vertical force of the wheels, and the stability of the movement of the wheel side driving device 10 can be improved.

It will be appreciated that the wheel drive 10 may also include a drive unit mount 600, and the stationary bearing portion may be rigidly connected to the drive unit mount 600 such that the drive unit mount 600 may bear the vertical forces to which the planet carrier 100 is subjected.

The second end 120 of the planet carrier 100 is provided with a sun gear 124, and referring to fig. 1 to 3, the sun gear 124 has a third end 1241 and a fourth end 1242 arranged opposite in the axial direction X. The third end 1241 is supported by the carrier 100, and in particular, the third end 1241 may be bearing-supported by the first sun gear 124 on the second carrier end cap 126, the second carrier end cap 126 being fixedly connected to the carrier 100. The fourth end 1242 is supported by the ring gear 310. Specifically, the fourth end 1242 is supported to the reduction gear ring 310 by the second sun gear bearing 1245. The above-mentioned connection structure of the sun gear 124 can form a first rotary kinematic pair, which can reduce the space volume of the wheel side driving device 10 and promote the overall structural compactness.

In some embodiments, referring to fig. 2 and 3, the wheel-side driving apparatus 10 further includes a sun gear end cover 1243, where the sun gear end cover 1243 is sleeved on the outer periphery of the fourth end 1242, 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).

Referring to fig. 3 and 6, the rim driving apparatus 10 further includes a plurality of planetary gears 125, wherein the plurality of planetary gears 125 are circumferentially spaced around the sun gear 124, and the reduction gear ring 310 is sleeved on the outer circumference of the planetary gears 125. The sun gear 124, the planet gears 125, and the reduction gear ring 310 are meshed with each other to form a planetary reduction mechanism.

Three groups of planetary gears 125 which are arranged at uniform intervals along the circumferential direction of the axis can be assembled on the planet carrier 100 through the planetary gear shafts 1251, and needle bearings can be arranged between the planetary gears 125 and the planetary gear shafts 1251, so that the friction force of rotation of the planetary gears 125 can be reduced, the abrasion of the planetary gears 125 is reduced, and the service life of the wheel side driving device 10 is prolonged.

Brake assembly 300 also includes brake pads disposed between carrier 100 and brake ring gear 320. The braking friction plate comprises a dynamic friction plate 340 and a static friction plate 350, the static friction plate 350 is arranged on one side of the dynamic friction plate 340 away from the sun gear 124, and the dynamic friction plate 340 is overlapped with the static friction plate 350 along the axis direction X, referring to FIG. 2.

In some embodiments, referring to fig. 2, the wheel-side drive apparatus 10 further includes a motor 500, the motor 500 being positioned and mounted to the reduction gear ring 310 via a spigot. The motor 500 has a torque output shaft with an internally splined structure and the sun gear 124 with an externally splined structure, such that the sun gear 124 can transmit torque by assembling the internal and external splines.

The carrier 100 is assembled with the stationary carrier part (the reduction gear ring 310, the brake gear ring 320, and the yoke housing 330 in an assembled combination) through the first carrier bearing 141 and the second carrier bearing 142 to form a second rotary kinematic pair. The wheel side driving apparatus 10 further includes a first carrier end cover 115, where the first carrier end cover 115 is sleeved on the outer periphery of the first end 110, so as to adjust the position of the second rotary kinematic pair along the axial direction X (i.e. adjust the axial play of the second kinematic pair).

In some embodiments, a planet carrier sealing ring 140 may be further disposed in the planet carrier end cover, referring to fig. 2 and 3, so as to prevent external dust and impurities from invading, prevent lubricating oil from flowing out, and improve the sealing performance of the planet carrier end cover. When the wheel carrier 200 is connected with the planet carrier 100, a spigot positioning and flange nuts can be additionally arranged to improve the connection stability.

The wheel drive 10 also includes an armature 380 and a friction plate stop 390. The static friction plate 350, armature 380, and friction plate stop 390 form an axial sliding kinematic pair with the brake ring 320 via splines. The dynamic friction plate 340 forms another axial sliding kinematic pair with the carrier 100 through splines. The static friction plate 350 and the dynamic friction plate 340 may overlap in relation to the axial direction X, and a friction resistance is generated by a pressing force of the armature 380.

In other embodiments, referring to fig. 2, the wheel rim drive 10 further includes a yoke housing 330. The inner cavity of the yoke housing 330 is uniformly arranged with a plurality of groups of electromagnetic coils 370 in the circumferential direction in the axial direction. The outside cavity of the yoke housing 330 has a relief piston 410, the relief piston 410 being connected to the armature 380 by a relief rod 400. A flanged nut is mounted on the outside of the relief piston 410. A certain gap is reserved between the flange surface of the nut and the outer side surface of the piston. The outer cavity of the yoke housing 330 is provided with small holes for oil to enter and exit the piston cavity.

The following describes the operation of the wheel side drive apparatus 10 of the above embodiment.

Driving principle: the motor 500 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 310, and the planetary gears 125 drive the planetary carrier 100 to rotate around the reduction gear ring 310 to output torque to the wheels, thereby realizing the driving function of the wheel side driving device 10.

The braking principle: when the electromagnetic coil 370 is not energized, the braking spring 360 sequentially presses the armature 380, the static friction plate 350, the moving friction plate 340 and the friction plate baffle 390 in the axial direction X, so that friction force is generated between the moving friction plate 340 and the static friction plate 350, and braking torque is formed. When the electromagnetic coil 370 is supplied with current, a magnetic field is generated, and as the current increases, the attraction force of the magnetic field on the armature 380 gradually balances with the pressing force of the braking spring, so that the friction plates are loosened, and the braking torque is reduced from the maximum value to zero. The braking force is released by energizing the passive electromagnetic brake when the passive electromagnetic brake is driven, and the braking force is controlled by controlling the current of the electromagnetic coil 370 when the passive electromagnetic brake is braked, wherein 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 transferred to the stationary bearing part of the driving unit consisting of the reduction gear ring 310, the brake gear ring 320 and the yoke housing 330 through the planet carrier 100 and the first planet carrier bearing 141 and the second planet carrier bearing 142 at both ends thereof, and then transferred to the driving unit mounting support 600 rigidly connected with the stationary bearing part.

Lubrication sealing principle: the inner cavity is sealed through a planet carrier sealing ring 140 and a second sun gear bearing 1245, an oil filling hole and an oil level observation hole are formed in the second planet carrier end cover 126, 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 310.

The wheel side driving apparatus 10 of some embodiments of the present application employs a medium and low rotation speed motor 500, a single-stage planetary reduction mechanism, and a multi-friction plate passive electromagnetic brake. The radial dimension of the wheel space is fully utilized in the structural arrangement, the planet carrier 100 can be directly connected with the wheel carrier 200, and the hub is omitted, so that the transmission ratio of the planetary reduction mechanism is maximized and the acting radius of the brake is maximized, and the driving torque and the braking torque which can be provided by the wheel side driving device 10 are maximized.

The present invention 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 embodiment adopts the planet carrier 100 to be directly connected with the wheel carrier 200, so that the structure of a wheel hub is saved, the space volume of the wheel edge driving device 10 can be reduced, and the transmission efficiency and the compactness of the whole structure are improved.

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 invention 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 invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A wheel rim driving apparatus, comprising:

a carrier including a first end and a second end arranged opposite to each other in an axial direction thereof;

the wheel frame comprises an installation part positioned at the center of the wheel frame;

wherein the first end is directly connected with the mounting portion.

2. The wheel rim driving apparatus as claimed in claim 1, wherein,

the wheel carrier comprises a wheel rim, the installation department connect in one side of rim along the axis direction, the installation department has along the first through-hole of axis direction extension, the installation department is along encircling first through-hole's circumference interval is provided with a plurality of first mounting holes, the planet carrier includes along the axis direction runs through self second through-hole, the second through-hole has the perisporium, first end department the perisporium is along encircling the circumference interval of axis is provided with a plurality of boss, each boss all has the second mounting hole, a plurality of the axis of first mounting hole respectively with a plurality of corresponding second mounting hole's axis coincidence, wheel limit drive arrangement includes a plurality of first bolts, a plurality of first bolt corresponds wears to establish a plurality of first mounting hole and a plurality of second mounting hole with connect the planet carrier with the wheel carrier.

3. The wheel rim driving apparatus as claimed in claim 2, wherein,

the second 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 first end, of the first wall surface, the second 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 an accommodating space for accommodating a plurality of planet gears.

4. The wheel side driving apparatus according to claim 1, further comprising a brake assembly including a reduction gear ring, a brake gear ring, and a yoke housing, both ends of the brake gear ring in the axial direction being respectively connected to the reduction gear ring and the yoke housing, the brake assembly being supported by the carrier.

5. The wheel rim driving apparatus as claimed in claim 4, wherein,

the second end is provided with a sun gear, the sun gear is provided with a third end and a fourth end which are oppositely arranged along the axis direction, the third end is supported by the planet carrier, and the fourth end is supported by the reduction gear ring.

6. The wheel rim driving apparatus as claimed in claim 5, wherein,

the wheel side driving device further comprises a plurality of planet gears, the planet gears are arranged around the sun gear at intervals in the circumferential direction, the speed reduction gear is sleeved on the peripheries of the planet gears, and the sun gear, the planet gears and the speed reduction gear rings are meshed with each other to form a planetary speed reduction mechanism.

7. The wheel rim driving apparatus as claimed in claim 5, wherein,

the brake assembly further comprises a brake friction plate, the brake friction plate is arranged between the planet carrier and the brake gear ring, the brake friction plate comprises a dynamic friction plate and a static friction plate, the static friction plate is arranged on one side, deviating from the sun wheel, of the dynamic friction plate, and the dynamic friction plate is overlapped with the static friction plate along the axis direction.

8. The wheel rim driving apparatus of claim 7, further comprising a sun gear end cap, wherein the sun gear end cap is sleeved on the outer periphery of the fourth end, and the sun gear end cap is used for adjusting the position of the sun gear along the axis direction.

9. The wheel side drive of claim 1, further comprising a first planet carrier end cap that is sleeved around the first end to adjust the position of the planet carrier in the axial direction.

10. A vehicle comprising a wheel-side drive device as claimed in any one of claims 1 to 9, and further comprising a controller for controlling the state of motion of the wheel-side drive device.