Rear suspension structure and vehicle

Abstract

The utility model provides a rear suspension structure and a vehicle, the rear suspension structure is applied to the vehicle, the vehicle comprises a first wheel edge assembly and a second wheel edge assembly which are oppositely arranged, and the rear suspension structure comprises a driving assembly used for connecting the first wheel edge assembly and the second wheel edge assembly; on the central axis of the first wheel edge assembly and the central axis of the second wheel edge assembly, the driving assembly is configured to deviate from the central axis, and an avoiding space is formed in the position, on the central axis, of the driving assembly; the rear axle is fixedly connected between the first wheel edge assembly and the second wheel edge assembly, the rear axle is provided with a buffering position used for being connected with a buffering block in a matched mode, and the buffering position is arranged in the avoiding space. According to the scheme, rear drive can be achieved, meanwhile, the height of a cargo platform of the whole truck is reduced, the cargo carrying capacity of a cargo box is increased, and the height of the buffer position is lower than that of the drive assembly.

Description

Technical Field

[0001] The present application relates to the technical field of rear suspension, and in particular to a rear suspension structure and a vehicle. Background Art

[0002] With the growth of my country's economy, the construction of infrastructure such as roads has accelerated, and goods have been transported to various parts of the country. The freight volume has continued to grow steadily, and light-duty new energy logistics vehicles play a pivotal role in the terminal transportation of goods. Therefore, the number of light-duty new energy logistics vehicles is increasing, and the competition is also increasing. Low cargo platform, large volume and climbing power have become the mainstream requirements of light-duty new energy logistics vehicles, and the rear suspension structure is an important factor affecting the height of the cargo platform, large volume and climbing power.

[0003] When the rear suspension structure adopts a rigid bridge leaf spring suspension, the vehicle's drive type can generally only be front-wheel drive. However, small trucks such as logistics trucks need to carry heavy objects and need to have a certain climbing ability when driving on sloped roads such as community basements. Because the center of gravity of front-wheel drive vehicles shifts backward on the slope, the adhesion of the front wheels will be weakened, and its climbing ability is weaker than that of rear-wheel drive vehicles. When the rear suspension structure adopts an electric drive bridge leaf spring structure, although rear-wheel drive is achieved, the drive component is fixedly connected to the rear axle assembly, and the drive component constitutes part of the weight of the rear axle assembly. When the vehicle passes a pit, the mass impact under the spring of the entire vehicle is large, resulting in poor user comfort.

[0004] Based on this, most of the existing technologies adopt a solution of a rigid bridge combined with rear drive. When adopting this solution, the suspension buffer block can only be arranged above the drive assembly, resulting in a higher height of the vehicle cargo platform and a smaller cargo capacity of the cargo box. Utility Model Content

[0005] The present application provides a rear suspension structure that can reduce the height of the cargo platform of the entire vehicle and increase the cargo capacity of the cargo box while realizing rear-wheel drive of the vehicle.

[0006] In a first aspect, the present application provides a rear suspension structure, which is applied to a vehicle, wherein the vehicle comprises a first wheel side assembly and a second wheel side assembly arranged opposite to each other, and the rear suspension structure comprises:

[0007] A drive assembly, used to connect the first wheel edge assembly and the second wheel edge assembly; wherein, along the central axis of the first wheel edge assembly and the second wheel edge assembly, the drive assembly is configured to be arranged away from the central axis, and the drive assembly forms an avoidance space at the central axis;

[0008] The rear axle is fixedly connected between the first wheel side assembly and the second wheel side assembly. The rear axle is provided with a buffer position for matching with a buffer block. The buffer position is arranged in the avoidance space. The height of the buffer position is lower than the height of the driving assembly.

[0009] Optionally, the drive assembly includes a drive member, a first drive half shaft and a second drive half shaft, the drive member is arranged to deviate from the central axis and is located on one side of the rear axle, the two ends of the first drive half shaft are respectively connected to the first wheel side assembly and the drive member, the two ends of the second drive half shaft are respectively connected to the second wheel side assembly and the drive member, and the drive member, the first drive half shaft and the second drive half shaft form the avoidance space at the central axis.

[0010] Optionally, the rear suspension structure further includes a first fixed ball cage and a second fixed ball cage, and the first driving half shaft is connected to the first wheel rim assembly through the first fixed ball cage, and is connected to the driving member through the second fixed ball cage.

[0011] Optionally, the first drive half shaft includes a first outer shaft and a first inner shaft, a partial structure of the first inner shaft is slidably inserted into the first outer shaft, one of the first outer shaft and the first inner shaft is connected to the first fixed ball cage, and the other is connected to the second fixed ball cage.

[0012] Optionally, the rear suspension structure also includes a first leaf spring, which is fixedly connected to one end of the rear axle close to the first wheel side assembly, and the first leaf spring is located below the first driving half shaft and has a movable space between the first leaf spring and the first driving half shaft.

[0013] Optionally, the rear axle includes a first connecting section, the first connecting section is provided with a first groove which is recessed away from the first driving half shaft, the first leaf spring is fixedly connected to the first connecting section and is located in the first groove, so that the first leaf spring and the first driving half shaft have the movable space.

[0014] Optionally, the rear axle further includes a rear axle body, the rear axle body and the first connecting section are formed separately, and the first connecting section fixedly connects the rear axle body and the first wheel side assembly.

[0015] Optionally, the rear axle further includes a rear axle body, the first connecting section fixedly connects the rear axle body and the first wheel side assembly, and the buffer position is arranged at the first connecting section.

[0016] Optionally, the first connecting section is further provided with a first shock absorber mounting portion on a side facing away from the driving assembly, and the rear suspension structure further includes a first shock absorber, and the first shock absorber is mounted on the first shock absorber mounting portion.

[0017] In a second aspect, the present application provides a vehicle, comprising the rear suspension structure, suspension and frame as described in any one of the above items, wherein the drive assembly is mounted on the frame via the suspension.

[0018] The rear suspension structure and vehicle provided by the present application include at least the following advantages:

[0019] The drive assembly forms an avoidance space at the central axis, so that the drive assembly and the buffer position for connecting with the buffer block can be staggered, that is, the arrangement height of the buffer block does not need to be affected by the drive assembly, and the buffer block can be set lower than the drive assembly. Compared with the traditional electric drive axle rear suspension structure and the rigid axle rear drive suspension structure, this solution can reduce the arrangement height of the buffer block to reduce the height of the vehicle cargo platform, thereby increasing the storage capacity of the cargo box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a top view of a rear suspension structure shown in an exemplary embodiment of the present application;

[0021] Figure 2 is a side structural schematic diagram of a rear suspension structure shown in an exemplary embodiment of the present application;

[0022] Figure 3 is a rear structural schematic diagram of a rear suspension structure shown in an exemplary embodiment of the present application;

[0023] Figure 4 is a perspective structural schematic diagram of a first driving half shaft shown in an exemplary embodiment of the present application;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of a rear suspension structure shown in an exemplary embodiment of the present application.

[0025] Explanation of the reference numerals: 10, buffer block; 20, drive assembly; 21, drive member; 22, first drive half shaft; 221, first outer shaft; 222, first inner shaft; 23, second drive half shaft; 24, avoidance space; 30, rear axle; 31, buffer position; 32, first connecting section; 321, first groove; 33, rear axle body; 34, second connecting section; 341, second groove; 41, first wheel side assembly; 42, second wheel side assembly; 51, first fixed ball cage; 52, second fixed ball cage; 61, first leaf spring; 62, second leaf spring; 71, first shock absorber; 72, second shock absorber. DETAILED DESCRIPTION

[0026] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application.

[0027] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0028] The present application provides a rear suspension structure and a vehicle. The rear suspension structure and the vehicle are described in detail below with reference to the accompanying drawings. In the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0029] refer to Figure 1 , Figure 2 and Figure 3 , an embodiment of the present application provides a rear suspension structure, which is applied to a vehicle. The vehicle may be a truck, a van, a sport utility vehicle or any other type of vehicle with a battery. In one embodiment, the vehicle is a high-voltage traction battery-powered electric vehicle (e.g., a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), etc.). In another embodiment, the vehicle is an autonomous vehicle that controls the maneuvering functions of the vehicle without direct input from a human driver. The rear suspension structure and the vehicle are described in detail below in conjunction with the accompanying drawings. The features in the following embodiments and implementations may be combined with each other unless there is a conflict.

[0030] Please refer to Figure 1The vehicle includes a first wheel assembly 41 and a second wheel assembly 42 that are relatively arranged. The relative arrangement here means that the first wheel assembly 41 and the second wheel assembly 42 are arranged at intervals along the width direction of the vehicle, that is, the central axis of the first wheel assembly 41 and the second wheel assembly 42 is perpendicular to the length direction of the vehicle. The rear suspension structure includes a drive assembly 20 and a rear axle 30. The drive assembly 20 is used to connect the first wheel assembly 41 and the second wheel assembly 42. On the central axis of the first wheel assembly 41 and the second wheel assembly 42, the drive assembly 20 is configured to be arranged deviated from the central axis, and the drive assembly 20 forms an avoidance space 24 at the central axis. The rear axle 30 is fixedly connected between the first wheel assembly 41 and the second wheel assembly 42. The rear axle 30 is provided with a buffer position 31 for matching with the buffer block 10. The buffer position 31 is arranged in the avoidance space 24, and the height of the buffer position 31 is lower than the height of the drive assembly 20.

[0031] It should be noted that the buffer position 31 on the rear axle 30 can be used to install the buffer block 10, that is, the buffer block 10 can be fixedly set on the buffer position 31 of the rear axle 30. Alternatively, the buffer block 10 can be set on the frame, and the buffer position 31 on the rear axle 30 is used to abut against the buffer block 10, which can also achieve a buffering effect. The frame here can also be a subframe, longitudinal beam and other structures of the vehicle.

[0032] By adopting the above technical scheme, the drive component 20 is formed with an avoidance space 24 at the central axis, so that the drive component 20 and the buffer position 31 for matching with the buffer block 10 can be staggered, that is, the arrangement height of the buffer block 10 does not need to be affected by the drive component 20, and the buffer block 10 can be set lower than the drive component 20. Compared with the traditional electric drive axle rear suspension structure and the rigid bridge rear drive suspension structure, this scheme can reduce the arrangement height of the buffer block 10 to reduce the height of the vehicle cargo platform, thereby increasing the storage capacity of the cargo box.

[0033] In one embodiment, the drive assembly 20 includes a drive member 21, a first drive axle 22, and a second drive axle 23. The drive member 21 is arranged away from the central axis and is located on one side of the rear axle 30. The two ends of the first drive axle 22 are respectively connected to the first wheel side assembly 41 and the drive member 21. The two ends of the second drive axle 23 are respectively connected to the second wheel side assembly 42 and the drive member 21. The drive member 21, the first drive axle 22, and the second drive axle 23 form an avoidance space 24 at the central axis. By arranging the drive member 21 away from the central axis, the first drive axle 22 connected between the drive member 21 and the first wheel side assembly 41 will gradually deviate from the central axis in the direction from the outside to the inside. Similarly, the second drive axle 23 will gradually deviate from the central axis in the direction from the outside to the inside. In this way, the first drive axle 22, the second drive axle 23, and the drive member 21 can form the above-mentioned avoidance space 24, thereby staggering with the buffer position 31 on the rear axle 30.

[0034] It should be noted that the above-mentioned "from outside to inside" refers to the direction from the outside of the vehicle to the inside of the vehicle, or in other words, the first wheel side assembly 41 points to the direction of the driving member 21, and the second wheel side assembly 42 points to the direction of the driving member 21. The driving member 21 may include a connected motor and a reducer, and the first driving half shaft 22 and the second driving half shaft 23 are both connected to the reducer.

[0035] In other embodiments, the drive assembly 20 may further include a first gear set (not shown), the drive member 21 may be disposed at the central axis, the first gear set includes at least two gears meshing with each other, one of the two gears is connected to the drive member 21, and the other is disposed away from the central axis and is connected to the first drive axle 22. In this way, the first drive axle 22 may be disposed away from the central axis. Similarly, the second drive axle 23 may be disposed away from the central axis in the same manner as the first drive axle 22, and in this case, the first drive axle 22 and the second drive axle 23 may be formed with the above-mentioned avoidance space 24.

[0036] refer to Figure 4 In one embodiment, the rear suspension structure further includes a first fixed ball cage 51 and a second fixed ball cage 52, and the first drive half shaft 22 is connected to the first wheel side assembly 41 through the first fixed ball cage 51, and is connected to the drive member 21 through the second fixed ball cage 52. In this way, the angle between the first drive half shaft 22 and the first wheel side assembly 41 and the drive member 21 can be larger, that is, the offset of the first drive half shaft 22 can be larger, so that the avoidance space 24 is larger, thereby facilitating the arrangement of the rear axle 30 and the buffer block 10. Specifically, the two ends of the first drive half shaft 22 are respectively connected to the first fixed ball cage 51 and the second fixed ball cage 52, the first fixed ball cage 51 is connected to the wheel hub bearing of the first wheel side assembly 41, and the second fixed ball cage 52 is connected to the output end of the drive member 21.

[0037] In a further embodiment, the first drive half shaft 22 includes a first outer shaft rod 221 and a first inner shaft rod 222, a part of the structure of the first inner shaft rod 222 is slidably disposed in the first outer shaft rod 221, one of the first outer shaft rod 221 and the first inner shaft rod 222 is connected to the first fixed ball cage 51, and the other is connected to the second fixed ball cage 52. In this way, the first drive half shaft 22 can change its own length, thereby meeting the sliding requirement caused by the jumping of the first wheel rim assembly 41. Figure 4 In the illustrated embodiment, the first outer shaft rod 221 is connected to the first fixed type ball cage 51 , and the first inner shaft rod 222 is connected to the second fixed type ball cage 52 , but the present invention is not limited thereto.

[0038] It should be noted that the specific structure of the first fixed ball cage 51 and the second fixed ball cage 52 can refer to the technical solutions in this field, the first drive half shaft 22 can be a ball spline structure, the first outer shaft 221 and the first inner shaft 222 are provided with a plurality of balls at the sliding fit, and the specific structure can refer to the existing ball spline, which will not be repeated in this embodiment.

[0039] In some embodiments, the rear suspension structure further includes a third fixed ball cage and a fourth fixed ball cage, and the second drive half shaft 23 is connected to the second wheel side assembly 42 through the third fixed ball cage, and is connected to the drive member 21 through the fourth fixed ball cage. The second drive half shaft 23 can also be a ball spline shaft, and the specific structure and connection method of the second drive half shaft 23 can refer to the first drive half shaft 22 mentioned above, which will not be repeated in this embodiment.

[0040] refer to Figure 3 and Figure 5 In one embodiment, the rear suspension structure further includes a first leaf spring 61, which is fixedly connected to one end of the rear axle 30 close to the first wheel assembly 41, and is located below the first drive axle 22, with a movable space between the first leaf spring 61 and the first drive axle 22. The movable space enables the first drive axle 22 to have a certain amount of movable space in height, thereby avoiding interference between the first drive axle 22 and the first leaf spring 61.

[0041] In one embodiment, the rear axle 30 includes a first connecting section 32, the first connecting section 32 is provided with a first groove 321 which is recessed away from the first driving half shaft 22, and the first leaf spring 61 is fixedly connected to the first connecting section 32 and is located in the first groove 321, so that the first leaf spring 61 and the first driving half shaft 22 have the movable space. In this way, the above movable space can be achieved without deliberately raising the position of the first driving half shaft 22, and the structure is simple and easy to manufacture.

[0042] In such Figure 3In the illustrated embodiment, the rear axle 30 further includes a rear axle body 33 connected to the first connecting section 32. The first connecting section 32 is in a U-shaped structure, and the two ends of the first connecting section 32 are respectively connected to the brake member of the first wheel assembly 41 and the rear axle body 33. The first connecting section 32 in a U-shaped structure can easily form the above-mentioned first groove 321, so that the first leaf spring 61 is disposed in the first groove 321, thereby being arranged below the first drive axle shaft 22.

[0043] In one embodiment, the first connecting section 32 is formed separately from the rear axle body 33, and the first connecting section 32 is fixedly connected to the rear axle body 33 and the first wheel assembly 41. The first connecting section 32 and the rear axle body 33 are formed separately to simplify the overall structure of the rear axle 30 and facilitate the production of the rear axle 30.

[0044] In one embodiment, the buffer position 31 is provided in the first connecting section 32. Thus, the first connecting section 32 is integrated with the first groove 321 and the buffer position 31, which can reasonably utilize the structure of the first connecting section 32, improve the integration degree of the first connecting section 32, and simplify the structure of the rear axle body 33.

[0045] In some embodiments, the rear axle 30 further includes a second connecting section 34, which is fixedly connected to the rear axle body 33 and the brake member of the second wheel assembly 42. The structure of the second connecting section 34 may be the same as that of the first connecting section 32. Two buffer positions 31 may be provided, one is provided on the first connecting section 32, and the other is provided on the second connecting section 34. The rear suspension structure further includes a second leaf spring 62, which is provided in a second groove 341 in the second connecting section 34. The second drive half shaft 23 and the second leaf spring 62 also have the above-mentioned movable space. The specific structure and connection relationship of the second connecting section 34 may refer to the specific structure and connection relationship of the first connecting section 32, and will not be described in detail in this embodiment.

[0046] In one embodiment, the rear suspension structure further includes a first shock absorber 71 and a second shock absorber 72, and the first shock absorber 71 and the second shock absorber 72 are arranged on the side of the rear axle 30 away from the driving member 21 to avoid interference with the driving member 21. For example, if the driving member 21 is arranged in front of the rear axle 30, the first shock absorber 71 and the second shock absorber 72 are arranged behind the rear axle 30. Alternatively, if the driving member 21 is arranged behind the rear axle 30, the first shock absorber 71 and the second shock absorber 72 are arranged in front of the rear axle 30.

[0047] Furthermore, a first shock absorber mounting portion is provided on the side of the first connecting section 32 facing away from the driving assembly 20, and the first shock absorber 71 is installed on the first shock absorber mounting portion. A second shock absorber mounting portion is also provided on the side of the second connecting section 34 facing away from the driving assembly 20, and the second shock absorber 72 can be fixedly connected to the second shock absorber mounting portion.

[0048] An embodiment of the present application also provides a vehicle, the vehicle comprising the rear suspension structure described in any of the above embodiments.

[0049] In one embodiment, the vehicle further comprises a suspension and a frame, and the drive member 21 is fixed to the frame via the suspension. In this way, the drive assembly 20 will not be regarded as the unsprung mass of the entire vehicle, thereby improving the comfort of the vehicle when driving on a pothole bottom.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A rear suspension structure, applied to a vehicle, the vehicle comprising a first wheel side assembly and a second wheel side assembly arranged opposite to each other, characterized in that: include: A drive assembly, used to connect the first wheel edge assembly and the second wheel edge assembly; wherein, along the central axis of the first wheel edge assembly and the second wheel edge assembly, the drive assembly is configured to be arranged away from the central axis, and the drive assembly forms an avoidance space at the central axis; The rear axle is fixedly connected between the first wheel side assembly and the second wheel side assembly. The rear axle is provided with a buffer position for matching with a buffer block. The buffer position is arranged in the avoidance space. The height of the buffer position is lower than the height of the driving assembly.

2. The rear suspension structure according to claim 1, characterized in that: The driving assembly includes a driving member, a first driving half shaft and a second driving half shaft. The driving member is arranged to deviate from the central axis and is located on one side of the rear axle. The two ends of the first driving half shaft are respectively connected to the first wheel side assembly and the driving member, and the two ends of the second driving half shaft are respectively connected to the second wheel side assembly and the driving member. The driving member, the first driving half shaft and the second driving half shaft form the avoidance space at the central axis.

3. The rear suspension structure according to claim 2, characterized in that: The rear suspension structure also includes a first fixed ball cage and a second fixed ball cage, the first driving half shaft is connected to the first wheel assembly through the first fixed ball cage, and is connected to the driving member through the second fixed ball cage.

4. The rear suspension structure according to claim 3, characterized in that: The first driving half shaft includes a first outer shaft and a first inner shaft, and a part of the structure of the first inner shaft is slidably arranged in the first outer shaft, and one of the first outer shaft and the first inner shaft is connected to the first fixed ball cage, and the other is connected to the second fixed ball cage.

5. The rear suspension structure according to claim 2, characterized in that: The rear suspension structure also includes a first leaf spring, which is fixedly connected to one end of the rear axle close to the first wheel assembly. The first leaf spring is located below the first drive half shaft and has a movable space between the first leaf spring and the first drive half shaft.

6. The rear suspension structure according to claim 5, characterized in that: The rear axle includes a first connecting section, the first connecting section is provided with a first groove which is recessed away from the first driving half shaft, the first leaf spring is fixedly connected to the first connecting section and is located in the first groove, so that the first leaf spring and the first driving half shaft have the movable space.

7. The rear suspension structure according to claim 6, characterized in that: The rear axle further comprises a rear axle body, wherein the rear axle body and the first connecting section are formed separately, and the first connecting section is fixedly connected to the rear axle body and the first wheel side assembly.

8. The rear suspension structure according to claim 6, characterized in that: The rear axle also includes a rear axle body, the first connecting section fixedly connects the rear axle body and the first wheel side assembly, and the buffer position is arranged at the first connecting section.

9. The rear suspension structure according to claim 6, characterized in that: The first connecting section is further provided with a first shock absorber mounting portion on a side facing away from the driving assembly, and the rear suspension structure further includes a first shock absorber, which is mounted on the first shock absorber mounting portion.

10. A vehicle, characterized in that: It comprises the rear suspension structure, suspension and frame as described in any one of claims 1 to 9, and the drive assembly is installed on the frame through the suspension.

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