Rear suspension structure and vehicle

Abstract

The utility model belongs to the technical field of vehicle chassis, and discloses a rear suspension structure and a vehicle, the rear suspension structure comprises a rocker arm, a rubber bushing and a spring shock absorber, the rocker arm is divided into a head end close to a vehicle head and a tail end far away from the vehicle head, the rocker arm is arranged on a vehicle frame along the length direction of the vehicle frame, and the rubber bushing is used for rotatably connecting the head end of the rocker arm with the vehicle frame. An assembling part is arranged in the middle area of the rocker arm and used for installing the hub assembly, the spring shock absorber is arranged at the tail end of the rocker arm and comprises a spring piece and a shock absorption piece, the shock absorption piece is sleeved with the spring piece, a bent part is arranged on the frame and provided with a folded edge opposite to the tail end, and the spring shock absorber is connected with the tail end of the rocker arm and the folded edge. The rear suspension structure is reasonable and simple in design, the deformation degree of the spring piece is large, the spring piece does not occupy the space of a frame, a cargo carrying piece can be simply assembled with the frame, the size of the cargo carrying piece is not affected, and the cargo carrying space of a vehicle is guaranteed.

Description

Technical Field

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

[0002] The rear suspension, also known as the rear suspension frame of an automobile, is the general term for all force transmission devices between the frame and the wheels. It can buffer the impact force transmitted from the uneven road surface to the frame or the body, reduce the vibration of the frame or the body caused by different road surfaces, so as to ensure that the vehicle can drive smoothly. That is, by installing a rear suspension on the vehicle, the stability, comfort and safety of the vehicle can be improved.

[0003] The rear suspension includes a spring member, a shock absorber member and a force transmission device. The spring member and the shock absorber member mainly ensure the buffering effect of the vehicle when passing through a bumpy section. To ensure the stability of the vehicle structure, the movement between the wheel and the frame is relatively small. In the existing rear suspension, the spring member is installed on the frame and located on one side of the wheel. Therefore, when the vehicle bumps, the deformation degree of the spring member is relatively small, resulting in difficulty in calculating the elastic stiffness of the existing spring member and difficulty in designing the spring member and the shock absorber member. At the same time, the spring member is installed on the frame, which will occupy the space of the frame, making it inconvenient to install the cargo-carrying member on the frame, and even affecting the volume of the cargo-carrying member and the cargo space of the vehicle.

[0004] Therefore, there is an urgent need for a rear suspension structure and a vehicle to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rear suspension structure and a vehicle, which can solve the problems that the deformation degree of the existing spring member is small, the elastic stiffness is difficult to calculate, and it is difficult to design the spring member and the shock absorber member; at the same time, the spring member is installed on the frame, occupying the space of the frame, making it inconvenient to install the cargo-carrying member on the frame, affecting the volume of the cargo-carrying member, and even affecting the cargo space of the vehicle.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A rear suspension structure is assembled on the frame of a vehicle. The rear suspension structure includes two transmission components, and the two transmission components are arranged on both sides of the frame in the width direction. The transmission component includes:

[0008] A rocker arm and a rubber bushing. The rocker arm is divided into a head end close to the vehicle head and a tail end far from the vehicle head. The rocker arm is placed on the frame along the length direction of the frame. The rubber bushing is used to rotatably connect the head end and the frame. An assembly part is provided in the middle area of the rocker arm, and the assembly part is used to install a hub assembly;

[0009] The spring shock absorber includes a spring member and a shock-absorbing member. The spring member sleeves the shock-absorbing member. A bending portion is provided on the vehicle frame. The bending portion has a hem edge opposite to the tail end. The shock-absorbing member is connected to the tail end and the hem edge.

[0010] As a preferred technical solution of the rear suspension structure, the rear suspension structure further includes a tie rod. The vehicle frame has a cross beam. The tie rod is connected and provided between the assembly portion and the cross beam.

[0011] As a preferred technical solution of the rear suspension structure, a connecting member is fixedly provided on the cross beam. A protruding column is provided on the connecting member. An installation groove is provided on the assembly portion. One end of the tie rod is rotatably connected to the protruding column, and the other end is rotatably placed in the installation groove through a pin shaft.

[0012] As a preferred technical solution of the rear suspension structure, the rocker arm includes a first connecting section, a second connecting section and a third connecting section which are welded to each other. The first connecting section is connected to the vehicle frame through the rubber bushing. The assembly portion is arranged on the second connecting section. The spring shock absorber is connected to the third connecting section.

[0013] As a preferred technical solution of the rear suspension structure, the third connecting section includes a stepped portion. The stepped portion includes a stepped surface which is lower than the vehicle frame. The spring shock absorber is connected to the stepped surface.

[0014] As a preferred technical solution of the rear suspension structure, the spring member is a coil spring or an air spring.

[0015] As a preferred technical solution of the rear suspension structure, the rear suspension structure further includes a connecting cross bar. The connecting cross bar connects the two ends of the vehicle frame in the width direction and extends out of the vehicle frame. The rocker arm is rotatably connected to the end of the connecting cross bar through the rubber bushing.

[0016] As a preferred technical solution of the rear suspension structure, the rocker arm is of a hollow structure.

[0017] A vehicle includes the rear suspension structure described in any one of the above. The vehicle further includes a vehicle head, a vehicle frame, a wheel hub assembly and a tire. The vehicle frame is connected to the vehicle head. The rear suspension structure is arranged on the vehicle frame. The wheel hub assembly is connected to the assembly portion of the rocker arm. The tire is connected to the wheel hub assembly.

[0018] As a preferred technical solution of the vehicle, the wheel hub assembly includes a steering knuckle and a wheel hub. The steering knuckle is connected to the assembly portion. The wheel hub is connected to the steering knuckle.

[0019] Compared with the prior art, the technical advantages of the rear suspension structure provided by the present utility model are:

[0020] 1: For the rear suspension structure provided by the present utility model, by rotatably connecting the head end of the rocker arm to the vehicle frame, assembling the wheel hub assembly at the assembly part in the middle area of the rocker arm, the wheel hub assembly supports the rocker arm, and the connection point between the rocker arm and the wheel hub assembly is the fulcrum of the rocker arm, enabling the rocker arm to form a lever structure. The spring damper is arranged at the tail end of the rocker arm, and the wheel hub assembly and the spring damper are arranged at intervals along the length direction of the vehicle frame. When the vehicle passes through a bumpy road section and the wheels and the vehicle frame shake, the movement amount of the spring damper is greater than the movement amount between the wheels and the vehicle frame, increasing the deformation degree of the spring member, making it easier to calculate the elastic stiffness of the spring member, and facilitating the design of the spring member and the damper member.

[0021] 2: Assembling the wheel hub assembly and the spring damper at the middle area and the tail end of the rocker arm respectively, avoiding the installation of the spring damper on the vehicle frame, thereby avoiding the spring damper occupying the space of the vehicle frame, reducing the installation difficulty of the vehicle frame and the cargo-carrying member. The cargo-carrying member does not need to adjust its own structure due to the spring damper, and the volume of the cargo-carrying member is not affected, ensuring the cargo space of the vehicle.

[0022] Compared with the prior art, the technical advantages of the vehicle provided by the present utility model are as follows:

[0023] For the vehicle provided by the present utility model, the rear suspension structure is simple, the design difficulty of the spring member in the rear suspension structure is low, the layout of the rear suspension structure is reasonable, avoiding the spring member occupying the space of the vehicle frame, and the volume of the cargo-carrying member of the vehicle is not affected by the spring member, ensuring the cargo space of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the assembly schematic diagram of the rear suspension structure provided by the present utility model and the vehicle frame;

[0025] Figure 2 is the assembly schematic diagram of the rear suspension structure, the vehicle frame and the wheels provided by the present utility model;

[0026] Figure 3 is the exploded schematic diagram of the wheel hub assembly provided by the present utility model.

[0027] In the figure:

[0028] 100, vehicle frame; 101, bending part; 1011, hem; 102, cross beam; 103, connecting piece; 1031, protruding column; 200, wheel hub assembly; 201, steering knuckle; 202, wheel hub; 300, tire;

[0029] 1, rocker arm; 11, first connecting section; 12, second connecting section; 121, assembly part; 1211, installation groove; 13, third connecting section; 131, step surface; 2, rubber bushing; 3, spring damper; 31, spring member; 32, damper member; 4, tie rod; 5, connecting cross bar. Detailed implementation manners

[0030] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0031] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact of the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0034] Embodiment 1

[0035] As Figure 1 and Figure 2As shown in the figure, this embodiment provides a rear suspension structure. The rear suspension structure is assembled on the vehicle frame 100 of a vehicle. The rear suspension structure includes two transmission components. The two transmission components are arranged on both sides of the frame 100 in the width direction. The transmission component includes a rocker arm 1, a rubber bushing 2, and a spring damper 3. The rocker arm 1 is divided into a front end close to the vehicle head and a rear end far from the vehicle head. The rocker arm 1 is placed on the frame 100 along the length direction of the frame 100. The rubber bushing 2 is used to rotatably connect the front end of the rocker arm 1 and the frame 100. The middle area of the rocker arm 1 has an assembly part 121, and the assembly part 121 is used to install the hub assembly 200. After the hub assembly 200 and the tire 300 are assembled, a wheel is formed. The spring damper 3 is arranged at the rear end of the rocker arm 1. The spring damper 3 includes a spring member 31 and a damper member 32. The spring member 31 is sleeved on the damper member 32. A bent part 101 is provided on the frame 100, and a hem 1011 opposite to the rear end is provided on the bent part 101. The spring damper 3 connects the rear end of the rocker arm 1 and the hem 1011 to realize the buffering effect on the vibration of the frame 100 when the frame 100 vibrates, so that the vehicle can also drive relatively smoothly when passing through bumpy roads.

[0036] For the rear suspension structure provided in this embodiment, by rotatably connecting the front end of the rocker arm 1 and the frame 100, and assembling the hub assembly 200 in the assembly part 121 in the middle area of the rocker arm 1, the hub assembly 200 supports the rocker arm 1. The connection point between the rocker arm 1 and the hub assembly 200 is the fulcrum of the rocker arm 1, so that the rocker arm 1 forms a lever structure. The spring damper 3 is arranged at the rear end of the rocker arm 1. The hub assembly 200 and the spring damper 3 are arranged at intervals along the length direction of the frame 100. When the vehicle passes through a bumpy road and the wheel and the frame 100 shake, the movement amount of the spring damper 3 is greater than the movement amount between the wheel and the frame 100, which increases the deformation degree of the spring member 31, makes it easier to calculate the elastic stiffness of the spring member 31, and makes the design of the spring member 31 and the damper member 32 easier; by assembling the hub assembly 200 and the spring damper 3 in the middle area and the rear end of the rocker arm 1 respectively, it is avoided to install the spring damper 3 on the frame 100, thereby avoiding the spring damper 3 occupying the space of the frame 100, reducing the installation difficulty of the frame 100 and the cargo-carrying member. The cargo-carrying member does not need to adjust its own structure due to the spring damper 3, and the volume of the cargo-carrying member is not affected, ensuring the cargo space of the vehicle.

[0037] In this embodiment, the rear suspension further includes a tie rod 4. The vehicle frame 100 has a cross beam 102, and the tie rod 4 is connected and arranged between the assembly part 121 and the cross beam 102. The arrangement of the tie rod 4 forms a connection between the middle area of the rocker arm 1 and the vehicle frame 100. When the vehicle passes through a bumpy road section or turns, the tie rod 4 makes the connection between the rocker arm 1 and the vehicle frame 100 more stable, keeps the rocker arm 1 and the vehicle frame 100 always in a parallel state, avoids the left - right swing of the rocker arm 1 relative to the vehicle frame 100 when the vehicle sways or turns, and reduces the risk of rollover when the vehicle passes through a bumpy road section or turns. Exemplarily, a connecting piece 103 is fixedly arranged on the cross beam 102, a protruding column 1031 is arranged on the connecting piece 103, an installation groove 1211 is arranged on the assembly part 121. One end of the tie rod 4 is rotatably connected to the protruding column 1031, and the other end is rotatably arranged in the installation groove 1211 through a pin shaft. When the vehicle passes through a bumpy road section, the vehicle frame 100 and the rocker arm 1 will generate relative rotation. While ensuring the parallelism between the rocker arm 1 and the vehicle frame 100, the tie rod 4 will not affect the rotation of the rocker arm 1 and the vehicle frame 100. Specifically, a first assembly hole and a second assembly hole are arranged on the tie rod 4. The first assembly hole is correspondingly assembled with the protruding column 1031. The second assembly hole on the tie rod 4 is placed in the installation groove 1211. Positioning holes are arranged on both side walls of the installation groove 1211. The pin shaft passes through the positioning holes and the installation holes to rotatably arrange the tie rod 4 in the installation groove 1211. Preferably, bearings are arranged in both the first assembly hole and the second assembly hole to further improve the smoothness of the rotation of the tie rod 4. In this embodiment, two tie rods 4 are arranged, and the two tie rods 4 are correspondingly connected to the two rocker arms 1 arranged on the vehicle frame 100.

[0038] Preferably, the rocker arm 1 includes a first connecting section 11, a second connecting section 12 and a third connecting section 13 which are welded to each other. The first connecting section 11 connects the rubber bushing 2 with the vehicle frame 100. The assembly part 121 is arranged on the second connecting section 12. The spring damper 3 is connected to the third connecting section 13. Since the head end, the middle area and the tail end of the rocker arm 1 are respectively connected to the vehicle frame 100, the wheel hub assembly 200 and the spring damper 3, the structure of the rocker arm 1 is relatively complex. If the rocker arm 1 is designed as an integral structure, a problem in one of the processing steps of the rocker arm 1 will lead to the scrapping of the entire rocker arm 1. By designing the rocker arm 1 as a split structure, the head end, the middle area and the tail end of the rocker arm 1 are processed separately. Even if there is a problem in the processing of a certain component, it will not lead to the scrapping of the entire rocker arm 1, which can not only reduce the waste of materials, but also simplify the processing of the rocker arm 1.

[0039] In this embodiment, the third connecting section 13 includes a stepped portion, and the stepped portion includes a stepped surface 131, where the stepped surface 131 is lower than the vehicle frame 100, and the spring shock absorber 3 is connected to the stepped surface 131. Compared with the prior art where the spring shock absorber 3 is directly installed on the vehicle frame 100, the distance between the top of the spring shock absorber 3 and the vehicle frame 100 is shortened. Since the spring shock absorber 3 is used to support the body weight of the vehicle, the center of gravity of the vehicle is thus lowered, improving the handling stability of the vehicle during driving and reducing the risk of rollover when the vehicle passes through bumpy roads or turns, thereby enhancing the driving safety of the driver.

[0040] In this embodiment, the spring member 31 can be a coil spring or an air spring. The spring member 31 absorbs the vertical force of the downward pressure of the vehicle body during the sinking of the vehicle body to achieve the effect of buffering impacts. The air spring realizes its elastic function by filling compressed gas in a sealed container and utilizing the compressible characteristics of the gas. Vehicles using a rear suspension structure with air springs have high overall comfort. The overall manufacturing cost of air springs is relatively high compared to coil springs. Therefore, no specific restrictions are made on the selection of the spring member 31 here. Regarding the coil spring in this embodiment, reference can be made to the prior art and no further elaboration will be given here.

[0041] In this embodiment, a connecting crossbar 5 is further provided on the vehicle frame 100. The connecting crossbar 5 connects the two ends of the vehicle frame 100 in the width direction, and the two ends of the connecting crossbar 5 extend out of the vehicle frame 100. The rocker arm 1 is rotatably connected to the end of the connecting crossbar 5 through a rubber bushing 2. The setting of the connecting crossbar 5 can reinforce the vehicle frame 100 and improve the structural stability of the vehicle frame 100. During actual assembly, it is necessary to first sleeved the rocker arm 1 with the rubber bushing 2, and then sleeve the rubber bushing 2 with the end of the connecting crossbar 5 to achieve the rotational connection between the rocker arm 1 and the connecting crossbar 5. Of course, a protruding portion can also be provided on the side of the vehicle frame 100, and the rubber bushing 2 is connected to the protruding portion, which can also enable the rocker arm 1 and the vehicle frame 100 to be rotatably connected through the rubber bushing 2.

[0042] Preferably, the rocker arm 1 is of a hollow structure, so that the overall rear suspension structure can be made lighter, further reducing the overall weight of the vehicle.

[0043] Embodiment Two

[0044] This embodiment provides a vehicle, including the rear suspension structure in Embodiment One. The vehicle further includes a vehicle head, a vehicle frame 100, a wheel hub assembly 200, and a tire 300. The vehicle frame 100 is connected to the vehicle head, the rear suspension structure is arranged on the vehicle frame 100, the wheel hub assembly 200 is connected to the assembly portion 121 of the rocker arm 1, and the tire 300 is connected to the wheel hub assembly 200.

[0045] The vehicle provided by this embodiment has a simple rear suspension structure. Moreover, in the rear suspension structure, the design difficulty of the spring member 31 is low, the layout of the rear suspension structure is reasonable, the space of the frame 100 is not occupied by the spring member 31, the volume of the cargo-carrying member of the vehicle is not affected by the spring member 31, and the cargo-carrying space of the vehicle is guaranteed.

[0046] In this embodiment, as Figure 2 and Figure 3 shown, the hub assembly 200 includes a knuckle 201 and a hub 202. The knuckle 201 is connected to the assembly part 121, and the hub 202 is connected to the knuckle 201. The structure of the assembly part 121 is adaptively designed according to the structure of the hub 202. The assembly part 121 has a central groove and a plurality of fixing grooves surrounding the outer periphery of the central groove. A part of the hub 202 is placed in the central groove. A plurality of lugs are provided on the hub 202, and a positioning hole is provided on each lug. The positioning holes are correspondingly arranged with the fixing grooves. After the bolt fastener passes through the positioning hole, it is locked in the fixing groove to install the knuckle 201 on the assembly part 121. Regarding the specific structures and assembly methods of the knuckle 201 and the hub 202, reference can be made to the prior art specifically, and no more details will be described here.

[0047] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A rear suspension structure, assembled on a vehicle frame (100), characterized in that The rear suspension structure includes two transmission components, and the two transmission components are arranged on both sides of the vehicle frame (100) in the width direction. The transmission component includes: A rocker arm (1) and a rubber bushing (2). The rocker arm (1) is divided into a head end close to the vehicle head and a tail end far from the vehicle head. The rocker arm (1) is placed on the vehicle frame (100) along the length direction of the vehicle frame (100). The rubber bushing (2) is used to rotatably connect the head end and the vehicle frame (100). An assembly portion (121) is provided in the middle area of the rocker arm (1), and the assembly portion (121) is used to mount a wheel hub assembly (200). A spring shock absorber (3), including a spring member (31) and a shock absorber member (32). The spring member (31) sleeved on the shock absorber member (32). A bent portion (101) is provided on the vehicle frame (100), and the bent portion (101) has a flange (1011) opposite to the tail end. The shock absorber member (32) is connected to the tail end and the flange (1011).

2. The rear suspension structure according to claim 1, characterized in that, The rear suspension structure further includes a tie rod (4). The vehicle frame (100) has a cross beam (102), and the tie rod (4) is connected between the assembly portion (121) and the cross beam (102).

3. The rear suspension structure according to claim 2, characterized in that, A connecting member (103) is fixedly provided on the cross beam (102), and a protruding column (1031) is provided on the connecting member (103). An installation groove (1211) is provided on the assembly portion (121). One end of the tie rod (4) is rotatably connected to the protruding column (1031), and the other end is rotatably placed in the installation groove (1211) through a pin shaft.

4. The rear suspension structure according to claim 1, characterized in that, The rocker arm (1) includes a first connection section (11), a second connection section (12) and a third connection section (13) which are welded to each other. The first connection section (11) is connected to the vehicle frame (100) through the rubber bushing (2). The assembly portion (121) is arranged on the second connection section (12), and the spring shock absorber (3) is connected to the third connection section (13).

5. The rear suspension structure according to claim 4, characterized in that, The third connection section (13) includes a step portion, and the step portion includes a step surface (131). The step surface (131) is lower than the vehicle frame (100), and the spring shock absorber (3) is connected to the step surface (131).

6. The rear suspension structure according to any one of claims 1-5, characterized in that, The spring member (31) is a coil spring or an air spring.

7. The rear suspension structure according to any one of claims 1-5, characterized in that, The rear suspension structure further includes a connecting cross bar (5). The connecting cross bar (5) connects both ends of the vehicle frame (100) in the width direction and extends out of the vehicle frame (100). The rocker arm (1) is rotatably connected to the end of the connecting cross bar (5) through the rubber bushing (2).

8. The rear suspension structure according to any one of claims 1-5, characterized in that, The rocker arm (1) is of a hollow structure.

9. A vehicle, characterized in that, Including the rear suspension structure according to any one of claims 1-8, the vehicle further includes a vehicle head, a vehicle frame (100), a wheel hub assembly (200) and a tire (300). The vehicle frame (100) is connected to the vehicle head, the rear suspension structure is disposed on the vehicle frame (100), the wheel hub assembly (200) is connected to the assembly portion (121) of the rocker arm (1), and the tire (300) is connected to the wheel hub assembly (200).

10. The vehicle according to claim 9, characterized in that The wheel hub assembly (200) includes a knuckle (201) and a wheel hub (202). The knuckle (201) is connected to the assembly portion (121), and the wheel hub (202) is connected to the knuckle (201).

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