CN219903968U - Chassis suspension device - Google Patents

Abstract

The utility model provides a chassis suspension device, which comprises a chassis; the buffer part comprises a first hinge end and a second hinge end which are oppositely arranged and hinged with the chassis, and the second hinge end is inclined upwards or downwards along the extending direction of the chassis; the swinging part comprises a third hinging end and a mounting end which are oppositely arranged and hinged with the chassis, the third hinging end and the second hinging end are distributed at intervals along the height direction, the axis direction of the hinging shaft of the third hinging end is the same as that of the hinging shaft of the first hinging end, the extending direction of the swinging part and the extending direction of the buffer part form an included angle, the mounting end is positioned on one side, far away from the first hinging end, of the second hinging end, and the second hinging end is hinged with the middle part of the swinging part; the driving wheel is rotatably arranged at the mounting end of the swinging part, and the axial direction of the driving wheel is the same as that of the hinge shaft of the third hinge end. According to the technical scheme provided by the utility model, the problem that the chassis jolts due to vibration of the driving wheel caused by uneven road surfaces in the prior art can be solved.

Description

Chassis suspension device

Technical Field

The utility model relates to the field of chassis devices, in particular to a chassis suspension device.

Background

At present, vibration of a chassis is reduced in a vehicle running process, and the vibration is mainly buffered through a chassis suspension device. The chassis suspension typically includes a chassis, a motor, a drive wheel, and a buffer device, the drive wheel being coupled to the chassis via the buffer device, the motor being disposed on the chassis and being drivingly coupled to the drive wheel to rotate the drive wheel. In the prior art, the buffer device is generally vertically arranged, when the chassis suspension device walks on an uneven road surface, the uneven road surface can cause vibration of the driving wheel, and the buffer device can only buffer the vibration of the driving wheel in the vertical direction, so that the buffer effect is limited.

Disclosure of Invention

The utility model provides a chassis suspension device, which aims to solve the problem that a buffer device in the prior art is arranged vertically and has limited buffer effect on a driving wheel.

The present utility model provides a chassis suspension device, comprising: a chassis; the buffer part comprises a first hinge end and a second hinge end which are oppositely arranged, the first hinge end is hinged with the chassis, and the second hinge end is inclined upwards or downwards along the extending direction of the chassis; the swinging part comprises a third hinging end and a mounting end which are oppositely arranged, the third hinging end is hinged with the chassis, the third hinging end and the second hinging end are distributed at intervals along the height direction of the chassis, the axis direction of a hinging shaft of the third hinging end is the same as that of a hinging shaft of the first hinging end, an included angle is formed between the extending direction of the swinging part and the extending direction of the buffer part, the mounting end is positioned on one side, far away from the first hinging end, of the second hinging end, and the second hinging end is hinged with the middle part of the swinging part; the driving wheel is rotatably arranged at the mounting end of the swinging part, and the axial direction of the driving wheel is the same as the axial direction of the hinge shaft of the third hinge end.

Further, the buffer portion is inclined downward in the extending direction of the chassis, the third hinge end is located below the second hinge end, and the swing portion is inclined upward in the extending direction of the chassis.

Further, the chassis suspension further includes: the driving assembly is arranged on the swinging part and is in driving connection with the driving wheel to drive the driving wheel to rotate.

Further, the swinging portion includes: one end of the swing arm forms a third hinged end, and the other end of the swing arm is inclined upwards or downwards along the extending direction of the chassis; the mounting plate is arranged at one end of the swing arm, which is far away from the third hinged end, and the one end of the mounting plate, which is far away from the swing arm, extends downwards, a mounting hole is formed in the mounting plate, the driving wheel and the driving component are respectively positioned at two sides of the mounting plate, and an output shaft of the driving component penetrates through the mounting hole and is in driving connection with the driving wheel.

Further, the drive assembly includes: and the explosion-proof motor and the speed reducer are mutually connected, the explosion-proof motor and the speed reducer are arranged on the mounting plate, and an output shaft of the speed reducer is in driving connection with the driving wheel.

Further, the chassis suspension further includes: the wheel shaft sleeve is sleeved on the outer side of the bearing and fixedly connected with the outer ring of the bearing, and is arranged on one side of the mounting plate far away from the driving assembly and coaxially arranged with the mounting hole; the wheel shaft of the driving wheel is arranged in the bearing in a penetrating way and is fixedly connected with the inner ring of the bearing.

Further, the buffer portion includes: the telescopic part is provided with a first hinging end formed at one end and hinged with the chassis, and a second hinging end formed at the other end and hinged with the middle part of the swinging part; and the elastic part is arranged on the telescopic part, one end of the elastic part is connected with the first hinge end, and the other end of the elastic part is connected with the second hinge end so as to buffer the telescopic part.

Further, the telescoping portion includes: the telescopic connecting device comprises a sleeve and a connecting rod which are sleeved with each other, wherein the sleeve is in sliding fit with the connecting rod, one end, far away from the connecting rod, of the sleeve is hinged with the chassis, and one end, far away from the sleeve, of the connecting rod is hinged with the middle part of the swinging part.

Further, the buffer portion further includes: the elastic part is positioned between the first axial limiting structure and the second axial limiting structure, and the first axial limiting structure and the second axial limiting structure are matched to limit the position of the elastic part.

Further, the elastic part is sleeved on the sleeve and the connecting rod; the first axial limiting structure comprises a first limiting ring, the first limiting ring is annularly arranged at one end of the sleeve, far away from the connecting rod, along the circumferential direction of the sleeve, and one end of the elastic part is abutted with one side, close to the connecting rod, of the first limiting ring; the second axial limit structure comprises a second limit ring, the second limit ring is annularly arranged at one end of the connecting rod far away from the sleeve along the circumferential direction of the connecting rod, and the other end of the elastic part is abutted with one side, close to the sleeve, of the second limit ring.

By adopting the technical scheme, the swinging part and the buffer part are arranged on the chassis, so that the driving wheel can be buffered in the vertical direction and the advancing direction of the chassis, and when the chassis suspension device of the scheme walks on an uneven road surface, the condition that the chassis bumps can be reduced, and the running stability of the chassis suspension device is ensured. Specifically, have the contained angle between swing portion and the buffering portion, but the swing portion passes through the third articulated end wobbling ground and sets up on the chassis, and the one end of buffering portion is articulated with the chassis, and the other end of buffering portion is articulated with the middle part of swing portion, so set up, can realize the swing portion and swing around the third articulated end, the buffer portion can play the effect of buffering to the swing of swing portion. When the vehicle with the chassis suspension device runs on an uneven road surface, the driving wheel is vibrated, the driving wheel is arranged at the installation end of the swinging part, the swinging part is driven to swing around the third hinging end by the vibration of the driving wheel, and the buffer part absorbs the vibration of the swinging part so as to play a role in buffering the swinging of the swinging part, namely, the buffer part can absorb and release the bounce of the chassis suspension device when passing through the uneven road surface, so that the driving wheel is kept in contact with the bottom surface as much as possible, and the stability of the chassis suspension device when running on the uneven road surface is ensured. In traditional technical scheme, only through the buffering portion and the drive wheel cooperation of vertical setting, buffering portion can only cushion the drive wheel in vertical direction promptly, and its buffering effect is limited. Compared with the traditional technical scheme, the swinging part and the buffering part in the device are matched, so that the driving wheel can be buffered in the vertical direction, the driving wheel can also be buffered in the running direction, the buffering effect on the driving wheel is further improved, and the stability of the chassis suspension device when running on an uneven road surface is further improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic view of the chassis suspension arrangement provided by the present utility model;

FIG. 2 illustrates a side cross-sectional view of the chassis suspension provided in FIG. 1;

fig. 3 shows an enlarged view of the structure at a provided in fig. 1.

Wherein the above figures include the following reference numerals:

10. a buffer section;

11. a telescopic part; 111. a sleeve; 112. a connecting rod;

12. an elastic part;

20. a swinging part; 21. swing arms; 22. a mounting plate;

221. a bearing; 222. a wheel hub; 223. a stop nut;

30. a driving wheel; 31. a wheel axle;

40. a drive assembly; 41. an explosion-proof motor; 42. a speed reducer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. 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.

As shown in fig. 1, an embodiment of the present utility model provides a chassis suspension including a chassis, a buffer portion 10, a swing portion 20, and a driving wheel 30. The buffer portion 10 includes a first hinge end and a second hinge end, which are disposed opposite to each other, the first hinge end being hinged to the chassis, and the second hinge end being inclined upward or downward along an extension direction of the chassis. The swinging part 20 comprises a third hinging end and a mounting end which are oppositely arranged, wherein the third hinging end is hinged with the chassis, the third hinging end and the second hinging end are distributed at intervals along the height direction of the chassis, the axis direction of a hinging shaft of the third hinging end is the same as that of a hinging shaft of the first hinging end, an included angle is formed between the extending direction of the swinging part 20 and the extending direction of the buffer part 10, the mounting end is positioned on one side, far away from the first hinging end, of the second hinging end, and the second hinging end is hinged with the middle part of the swinging part 20. The driving wheel 30 is rotatably provided at the mounting end of the swing portion 20, and the axial direction of the driving wheel 30 is the same as the axial direction of the hinge shaft of the third hinge end.

By adopting the technical scheme of the utility model, the swinging part 20 and the buffer part 10 are arranged on the chassis, so that the driving wheel 30 can be buffered in the vertical direction and the advancing direction of the chassis, when the chassis suspension device of the scheme walks on an uneven road surface, the condition that the chassis bumps can be reduced, and the running stability of the chassis suspension device is ensured. Specifically, an included angle is formed between the swinging part 20 and the buffer part 10, the swinging part 20 is arranged on the chassis in a swinging way through a third hinging end, one end of the buffer part 10 is hinged with the chassis, the other end of the buffer part 10 is hinged with the middle part of the swinging part 20, the swinging of the swinging part 20 around the third hinging end can be realized, and the buffer part 10 can play a role in buffering the swinging of the swinging part 20. When the vehicle with the chassis suspension device runs on an uneven road surface, the driving wheel 30 is vibrated, and as the driving wheel 30 is mounted at the mounting end of the swinging part 20, the driving wheel 30 vibrates to drive the swinging part 20 to swing around the third hinging end, and the buffer part 10 absorbs the vibration of the swinging part 20 so as to play a role in buffering the swinging of the swinging part 20, namely, the buffer part 10 can absorb and release the bounce of the chassis suspension device when the chassis suspension device passes through the uneven road surface, so that the driving wheel 30 keeps contact with the bottom surface as much as possible, and the stability of the chassis suspension device running on the uneven road surface is ensured. In traditional technical scheme, only through the buffering portion and the drive wheel cooperation of vertical setting, buffering portion can only cushion the drive wheel in vertical direction promptly, and its buffering effect is limited. Compared with the traditional technical scheme, the swinging part 20 and the buffer part 10 in the device are matched, so that the driving wheel 30 can be buffered in the vertical direction, the driving wheel can also be buffered in the running direction, the buffer effect on the driving wheel 30 is further improved, and the stability of the chassis suspension device when running on an uneven road surface is further improved.

Specifically, the buffer part 10 is inclined downward in the extending direction of the chassis, the third hinge end is located below the second hinge end, and the swing part 20 is inclined upward in the extending direction of the chassis. So set up, buffer part 10 and swing part 20 constitute the cross structure jointly, and the kinetic energy that the drive wheel 30 conducted to swing part 20 is buffered to adapt to the road surface of unevenness.

Further, in the present embodiment, the buffer portion 10, the swinging portion 20 and the driving wheel 30, which are mutually matched, form walking portions, two groups of walking portions are respectively provided on two side walls, which are oppositely arranged in the width direction of the chassis, two walking portions in each group are provided, and the two walking portions in each group are distributed at intervals along the travelling direction of the chassis. The second hinged ends of the two buffer parts 10 in each group of walking parts are far away from each other, and the two driving wheels 30 in each group are respectively positioned on one sides of the two swinging parts 20 which are far away from each other, so that the arrangement can ensure that the two driving wheels 30 in one group of walking parts have enough distance to ensure the stability of the chassis. And four drive wheels 30 are independently arranged, can prevent that a certain single drive wheel 30 is unsettled when the chassis encounters great road surface fluctuation, causes the vehicle to skid and can't advance, promotes the trafficability characteristic of vehicle.

In the present utility model, the chassis suspension further includes a driving assembly 40 disposed on the swing portion 20, and the driving assembly 40 is in driving connection with the driving wheel 30 to drive the driving wheel 30 to rotate. The swinging part 20 is provided with a threaded connection hole matched with the driving assembly 40, the driving assembly 40 is fixedly connected with the swinging part 20 through the threaded connection hole by using bolts, and the driving assembly 40 is connected with the wheel shaft 31 of the driving wheel 30 to provide power for the driving wheel 30 so as to drive the driving wheel 30 to rotate.

By the technical scheme of the utility model, the swinging part 20 comprises a swinging arm 21 and a mounting plate 22. Wherein, the one end of swing arm 21 forms the third articulated end, and the other end of swing arm 21 upwards or downward sloping along the extending direction of chassis, mounting panel 22 set up the one end of keeping away from the third articulated end of swing arm 21, and the one end of keeping away from the swing arm 21 of mounting panel 22 downwardly extending is provided with the mounting hole on the mounting panel 22, and drive wheel 30 and drive assembly 40 are located the both sides of mounting panel 22 respectively, and drive assembly 40's output shaft passes the mounting hole and is connected with the drive wheel 30 drive. In this embodiment, the end of the swing arm 21 away from the third hinge end is inclined upwards along the extending direction of the chassis, and the third hinge ends of the two swing arms 21 are away from each other, and the end of the mounting plate 22 away from the swing arm 21 extends downwards, so that the chassis suspension device structure is more compact, and the chassis is more stable in the travelling process. According to the arrangement scheme of the utility model, the driving shaft of the driving assembly 40 is in driving connection with the driving wheel 30 to provide power for the driving wheel 30, the swing arm 21 is connected with the chassis through the third hinge end and moves around the third hinge end, when the driving wheel 30 moves on an uneven road, vibration is transmitted to the swing arm 21 through the mounting plate 22, so that the swing arm 21 moves around the third hinge end, the vibration is transmitted to the buffer part 10 to absorb vibration kinetic energy, and the influence of the vibration on the chassis is reduced to improve the running stability of the device.

Further, the swing arm 21 has an arc structure with a middle portion protruding toward the direction of the buffer portion 10, so that the structural strength of the swing arm 21 can be increased, and damage to the swing arm 21 can be prevented.

As shown in fig. 1 and 2, in the present utility model, the driving assembly 40 includes an explosion-proof motor 41 and a speed reducer 42 connected to each other, the explosion-proof motor 41 and the speed reducer 42 are both provided on the mounting plate 22, and an output shaft of the speed reducer 42 is drivingly connected to the driving wheel 30. Through the design, the explosion-proof motor 41 and the speed reducer 42 are arranged on the mounting plate 22, in the embodiment, the driving assembly 40 is provided with four groups, and the four groups of driving assemblies respectively drive the four driving wheels 30, so that four differential driving is realized, the trafficability of the vehicle body on a road with uneven pavement is enhanced, the internal space of the chassis can be saved by independently arranging the explosion-proof motor 41, the component placement in the chassis is optimized, and the space utilization of the vehicle body is improved.

As shown in fig. 1 and 2, further, the chassis suspension device further includes a bearing 221 and an axle sleeve 222 that are sleeved with each other, the axle sleeve 222 is sleeved outside the bearing 221 and fixedly connected with an outer ring of the bearing 221, the axle sleeve 222 is disposed on a side of the mounting plate 22 away from the driving assembly 40 and coaxially disposed with the mounting hole, and the wheel axle 31 of the driving wheel 30 is inserted into the bearing 221 and fixedly connected with an inner ring of the bearing 221. In the utility model, the stop nut 223 is arranged at the joint of the wheel shaft 31 and the speed reducer 42, the stop nut 223 can limit the displacement of the bearing 221 relative to the wheel shaft 31 in the axial direction, the bearing 221 is prevented from being separated due to vibration in the vehicle body movement process, and the connection stability of the wheel shaft 31 and the bearing 221 is ensured.

As shown in fig. 3, in the present utility model, the cushioning portion 10 includes a stretchable portion 11 and an elastic portion 12. Wherein, the one end of flexible portion 11 forms first articulated end and articulates with the chassis, and the other end of flexible portion 11 forms the second articulated end and articulates with the middle part of swing portion 20, and elastic part 12 sets up on flexible portion 11, and the one end of elastic part 12 is connected with first articulated end, and the other end is connected with the second articulated end to cushion the flexible of flexible portion 11. In this embodiment, the elastic portion 12 is a spring, and when the telescopic portion 11 is compressed or stretched by the force of the swing arm 21, the spring is matched with the telescopic portion to compress or stretch so as to absorb the kinetic energy from the swing arm 21, and the elastic portion 12 and the telescopic portion 11 are matched together to play a role in buffering the chassis. In other embodiments of the present utility model, the buffer portion 10 may be in other forms such as a hydraulic buffer, as long as the buffer portion can absorb the stress transmitted from the driving wheel 30 to the buffer portion 10 and perform a buffering function.

In this embodiment, the telescopic portion 11 includes a sleeve 111 and a connecting rod 112 that are sleeved with each other, the sleeve 111 is slidably matched with the connecting rod 112, one end of the sleeve 111 away from the connecting rod 112 is hinged with the chassis, and one end of the connecting rod 112 away from the sleeve 111 is hinged with the middle of the swinging portion 20. Through the above-mentioned setting, can be convenient for change or overhaul elastic part 12 to sleeve pipe 111 and connecting rod 112 can also play the effect of direction to the spring, reduce the condition that the spring flexible in-process takes place the slope, guarantee the stability of spring flexible process.

Further, the buffer portion 10 further includes a first axial limiting structure and a second axial limiting structure, the first axial limiting structure is disposed on the sleeve 111, the second axial limiting structure is disposed on the connecting rod 112, the elastic portion 12 is located between the first axial limiting structure and the second axial limiting structure, and the first axial limiting structure and the second axial limiting structure cooperate to limit the position of the elastic portion 12. Through the arrangement, the elastic part 12 can be restrained, the elastic part 12 is prevented from falling off from the sleeve 111 and the connecting rod 112, the elastic part 12 is ensured to continuously absorb the kinetic energy of vibration, and the running stability of the chassis is further ensured.

Further, the elastic portion 12 is sleeved on the sleeve 111 and the connecting rod 112. The first axial limiting structure comprises a first limiting ring, the first limiting ring is annularly arranged at one end, far away from the connecting rod 112, of the sleeve 111 along the circumferential direction of the sleeve 111, and one end of the elastic part 12 is abutted with one side, close to the connecting rod 112, of the first limiting ring. The second axial limiting structure comprises a second limiting ring, the second limiting ring is annularly arranged at one end, far away from the sleeve 111, of the connecting rod 112 along the circumferential direction of the connecting rod 112, and the other end of the elastic part 12 is abutted with one side, close to the sleeve 111, of the second limiting ring. Through the arrangement, the diameters of the first limiting ring and the second limiting ring are larger than the diameter of the elastic part 12, so that the elastic part 12 can be prevented from radial deformation under the condition of stress compression, the elastic part 12 is prevented from falling off from the telescopic part 11, and the situation that the buffer effect of the buffer part 10 is lost is avoided. The first limiting ring and the second limiting ring are simple in structure, and the spring, the sleeve 111 and the connecting rod 112 can be assembled conveniently.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A chassis suspension, comprising:

a chassis;

the buffer part (10) comprises a first hinge end and a second hinge end which are oppositely arranged, the first hinge end is hinged with the chassis, and the second hinge end is inclined upwards or downwards along the extending direction of the chassis;

the swinging part (20) comprises a third hinging end and a mounting end which are oppositely arranged, the third hinging end is hinged with the chassis, the third hinging end and the second hinging end are distributed at intervals along the height direction of the chassis, the axis direction of a hinging shaft of the third hinging end is the same as the axis direction of a hinging shaft of the first hinging end, the extending direction of the swinging part (20) and the extending direction of the buffer part (10) form an included angle, the mounting end is positioned on one side, far away from the first hinging end, of the second hinging end, and the second hinging end is hinged with the middle part of the swinging part (20);

and a driving wheel (30) rotatably provided at the mounting end of the swing portion (20), wherein the axial direction of the driving wheel (30) is the same as the axial direction of the hinge shaft of the third hinge end.

2. Chassis suspension according to claim 1, characterized in that the buffer part (10) is inclined downwards in the direction of extension of the chassis, the third hinge end is located below the second hinge end, and the swing part (20) is inclined upwards in the direction of extension of the chassis.

3. The chassis suspension of claim 1, wherein the chassis suspension further comprises:

the driving assembly (40) is arranged on the swinging part (20) and is in driving connection with the driving wheel (30) to drive the driving wheel (30) to rotate.

4. A chassis suspension according to claim 3, wherein the swinging part (20) comprises:

the third hinge end is formed at one end of the swing arm (21), and the other end of the swing arm (21) is inclined upwards or downwards along the extending direction of the chassis;

the mounting plate (22) is arranged at one end, far away from the third hinged end, of the swing arm (21), the mounting plate (22) is far away from one end, extending downwards, of the swing arm (21), mounting holes are formed in the mounting plate (22), the driving wheel (30) and the driving assembly (40) are respectively located at two sides of the mounting plate (22), and an output shaft of the driving assembly (40) penetrates through the mounting holes and is in driving connection with the driving wheel (30).

5. Chassis suspension according to claim 4, wherein the drive assembly (40) comprises:

the explosion-proof motor (41) and the speed reducer (42) are connected with each other, the explosion-proof motor (41) and the speed reducer (42) are both arranged on the mounting plate (22), and an output shaft of the speed reducer (42) is in driving connection with the driving wheel (30).

6. The chassis suspension of claim 4, wherein the chassis suspension further comprises:

the bearing (221) and the wheel axle sleeve (222) are sleeved with each other, the wheel axle sleeve (222) is sleeved on the outer side of the bearing (221) and fixedly connected with the outer ring of the bearing (221), and the wheel axle sleeve (222) is arranged on one side, far away from the driving assembly (40), of the mounting plate (22) and is coaxially arranged with the mounting hole;

the wheel shaft (31) of the driving wheel (30) is arranged in the bearing (221) in a penetrating way and is fixedly connected with the inner ring of the bearing (221).

7. Chassis suspension according to claim 1, wherein the buffer (10) comprises:

the telescopic part (11), one end of the telescopic part (11) forms the first hinging end and is hinged with the chassis, and the other end of the telescopic part (11) forms the second hinging end and is hinged with the middle part of the swinging part (20);

and the elastic part (12) is arranged on the telescopic part (11), one end of the elastic part (12) is connected with the first hinge end, and the other end of the elastic part (12) is connected with the second hinge end so as to buffer the telescopic part (11).

8. Chassis suspension according to claim 7, wherein the telescopic part (11) comprises:

sleeve pipe (111) and connecting rod (112) that cup joint each other, sleeve pipe (111) with connecting rod (112) sliding fit, the one end that keeps away from of sleeve pipe (111) with the chassis articulates, the one end that keeps away from of connecting rod (112) sleeve pipe (111) with the middle part of swing portion (20) articulates.

9. Chassis suspension according to claim 8, wherein the buffer (10) further comprises:

the first axial limiting structure and the second axial limiting structure are arranged on the sleeve (111), the second axial limiting structure is arranged on the connecting rod (112), the elastic part (12) is located between the first axial limiting structure and the second axial limiting structure, and the first axial limiting structure and the second axial limiting structure are matched to limit the position of the elastic part (12).

10. Chassis suspension according to claim 9, wherein the elastic part (12) is sleeved on the sleeve (111) and the connecting rod (112);

the first axial limiting structure comprises a first limiting ring, the first limiting ring is annularly arranged at one end, far away from the connecting rod (112), of the sleeve (111) along the circumferential direction of the sleeve (111), and one end of the elastic part (12) is abutted with one side, close to the connecting rod (112), of the first limiting ring;

the second axial limiting structure comprises a second limiting ring, the second limiting ring is annularly arranged at one end, far away from the sleeve (111), of the connecting rod (112) along the circumferential direction of the connecting rod (112), and the other end of the elastic part (12) is abutted to one side, close to the sleeve (111), of the second limiting ring.