Suspension system and chassis

Abstract

The invention relates to the technical field of vehicle suspensions, in particular to a suspension system and a chassis. The suspension system comprises an upper swing arm, a shock absorber, a shaft joint, a sliding part and a sliding guide part, the shaft joint is suitable for being installed on a wheel, the outer side of the upper swing arm is rotationally connected with the shaft joint, and the inner side of the upper swing arm is suitable for being rotationally connected to a vehicle body or a vehicle frame; the sliding guide part is suitable for being installed on a vehicle body or a vehicle frame and extends in the left-right direction of the vehicle, the outer end of the shock absorber is rotationally connected with the upper swing arm, the inner end of the shock absorber is rotationally connected with the sliding part, the sliding part is in sliding connection with the sliding guide part, and the sliding part can reciprocate between a first position and a second position; the second position is located on the inner side of the first position. When the suspension system is unfolded to work, the lever ratio of the shock absorber can be guaranteed, enough damping force is provided for the suspension, and space is saved when the suspension system is folded and stored.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle suspension, and in particular relates to a suspension system and a chassis. Background Art

[0002] The shock absorber is an important component in the suspension system. The layout of the shock absorber in the suspension system has an important impact on the efficiency of the shock absorber and the design of the shock absorber itself. For all-terrain vehicles that require wheels with folding and storage functions, the layout of the shock absorber in the suspension system is quite difficult.

[0003] In the prior art, in order not to occupy the space in the middle of the frame, the all-terrain suspension with a folding and storage function has a limited angle for arranging the shock absorber, and a relatively small lever, resulting in too small a damping force provided by the shock absorber. Summary of the invention The technical problem to be solved by the present invention is: to provide a suspension system and a chassis in view of the problem that the lever of the existing suspension is relatively small, resulting in too small damping force provided by the shock absorber.

[0004] To solve the above technical problems, on the one hand, an embodiment of the present invention provides a suspension system, including an upper swing arm, a shock absorber, a shaft joint, a sliding member and a sliding guide member, wherein the shaft joint is suitable for being installed on a wheel, the outer side of the upper swing arm is rotatably connected to the shaft joint, and the inner side of the upper swing arm is suitable for being rotatably connected to a vehicle body or a frame; the sliding guide member is suitable for being installed on a vehicle body or a frame and extending along the left and right directions of the vehicle, the outer end of the shock absorber is rotatably connected to the upper swing arm, the inner end of the shock absorber is rotatably connected to the sliding member, the sliding member is slidably connected to the sliding guide member, and the sliding member can reciprocate between a first position and a second position; wherein the second position is located on the inner side of the first position.

[0005] Optionally, the suspension system further comprises a lower swing arm, the upper swing arm is located above the lower swing arm, the outer side of the lower swing arm is rotatably connected to the axle joint, and the inner side of the lower swing arm is suitable for being rotatably connected to the vehicle body or frame.

[0006] Optionally, the outer side and inner side of the upper swing arm rotate around the first axis and the second axis respectively, the outer side and inner side of the lower swing arm rotate around the third axis and the fourth axis respectively, the outer end of the shock absorber rotates around the fifth axis, and the inner end of the shock absorber rotates around the sixth axis, and the first axis, the second axis, the third axis, the fourth axis, the fifth axis and the sixth axis all extend along the front and rear direction of the vehicle.

[0007] Optionally, the suspension system also includes a torsion bar spring, both ends of which are suitable for installation on the vehicle body or frame, the torsion bar spring extends along the front and rear directions of the vehicle, the inner side of the upper swing arm is connected to the torsion bar spring, and the upper swing arm can drive the torsion bar spring to twist when it rotates.

[0008] Optionally, the torsion bar spring has a first end and a second end opposite to each other in the front-rear direction of the vehicle, and the first end and the second end are rotatably connected to the vehicle body or the frame; It also includes a first locking device, which can lock the second end in the first position so that the second end can be temporarily fixed to the vehicle body or frame; in the second position, the first locking device can release the lock on the second end so that the second end can rotate relative to the vehicle body or frame.

[0009] Optionally, the upper swing arm includes a first arm and a second arm, the outer end of the first arm intersects with the outer end of the second arm, the first arm and the second arm gradually move away from the outside to the inside, the inner end of the first arm is fixedly connected to the first end of the torsion bar spring, and the inner end of the second arm is rotatably connected to the second end of the torsion bar spring.

[0010] Optionally, a shock absorber upper point mounting bracket is provided on the top side of the upper swing arm, and the outer end of the shock absorber is rotatably connected to the shock absorber upper point mounting bracket, the outer end of the shock absorber is higher than the inner end of the shock absorber, and a sleeve is provided on the inner side of the shock absorber upper point mounting bracket, the sleeve is hollowly mounted on the middle outer periphery of the torsion bar spring, and the sleeve is located below the outer end of the shock absorber.

[0011] Optionally, the suspension system further comprises a second locking device for locking the sliding member on the sliding guide component; when the second locking device is released from locking the sliding member, the sliding member can slide between the first position and the second position along the left-right direction of the vehicle.

[0012] Optionally, the sliding guide component is a slide rail, and the slide rail extends along the left-right direction of the vehicle.

[0013] According to the suspension system provided by the embodiment of the present invention, when the vehicle needs to travel, the outer side of the upper swing arm is rotatably connected to the inner side of the shaft joint, so that the wheel is connected to the body or frame, the outer end of the shock absorber is rotatably connected to the upper swing arm, and the inner end slides in the sliding guide component and moves to the first position, so that the suspension system is converted from the storage state to the deployment state. At the same time, the inner end of the shock absorber is rotatably connected to the sliding member, and the setting of the sliding member and the sliding guide component being slidably connected optimizes the lever ratio of the shock absorber, increases the damping force that can be provided when the suspension is working, thereby improving the damping efficiency, and the effective damping force helps to absorb the bumps and impacts of the road surface and improve the ride comfort. When the vehicle needs to be folded and stored, the bottom of the shock absorber moves from the first position to the second position, and the suspension system is converted from the deployment state to the storage state, reducing the space occupied by the suspension system, reducing the length of the shock absorber compressed when folded and stored, and correspondingly reducing the total length of the shock absorber, reducing the weight of the shock absorber, and facilitating the folding and storage of the vehicle. That is, the suspension of the present application can be folded and stored to save space, and at the same time, the lever ratio of the shock absorber can be ensured when it is unfolded and working, thereby providing sufficient damping force for the suspension.

[0014] On the other hand, an embodiment of the present invention provides a chassis, comprising two of the above-mentioned suspension systems; One of the suspension systems is arranged on the left side of the vehicle body, and the other suspension system is arranged on the right side of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a suspension system provided by an embodiment of the present invention in an unfolded state; Figure 2 It is a schematic structural diagram of a suspension system in a stowed state provided by an embodiment of the present invention.

[0016] The reference numerals in the specification are as follows: 1. Upper swing arm; 2. Shock absorber; 3. Axle joint; 4. Sliding guide component; 5. Lower swing arm; 6. Torsion bar spring; 7. Shock absorber upper point mounting bracket; 8. Sliding part; 9. Wheel; 10. Frame; 41. First guide rail; 42. Second guide rail; 71. Sleeve. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a suspension system, including an upper swing arm 1, a shock absorber 2, a shaft joint 3, a sliding member 8 and a sliding guide component 4, wherein the shaft joint 3 is suitable for being installed on a wheel 9, the outer side of the upper swing arm 1 is rotatably connected to the shaft joint 3, and the inner side of the upper swing arm 1 is suitable for being rotatably connected to a vehicle body or a frame 10; the sliding guide component 4 is suitable for being installed on a vehicle body or a frame 10 and extending along the left-right direction of the vehicle, the outer end of the shock absorber 2 is rotatably connected to the upper swing arm 1, the inner end of the shock absorber 2 is rotatably connected to the sliding member 8, the sliding member 8 is slidably connected to the sliding guide component 4, and the sliding member 8 can reciprocate between a first position and a second position; wherein the second position is located inside the first position. In this embodiment, when the bottom of the shock absorber 2 is located at the first position, the suspension system is deployed, and when the bottom of the shock absorber 2 is located at the second position, the suspension system is retracted. The upper swing arm 1 is connected to the frame 10, the vehicle body or the axle joint 3 through a bushing or a ball pin, and the shock absorber 2 is connected to the upper swing arm 1 through a bolt, so that the suspension system realizes the basic functions of bearing, guiding and buffering, and adds a folding and storage function. Through the arrangement of the sliding member 8 and the sliding guide component 4, the top of the shock absorber 2 is rotatably mounted on the upper swing arm 1 and the bottom of the shock absorber 2 is slidably connected to the sliding guide component 4, the lever ratio of the shock absorber 2 in the suspension deployment state (the stroke of the shock absorber 2 divided by the wheel center stroke) is guaranteed to the greatest extent, and the shock absorber 2 can provide sufficient damping force. The addition of the sliding guide component 4 minimizes the length required to compress the shock absorber 2 in the suspension storage state, and reduces the total length and weight of the shock absorber 2. It can be used for all-terrain vehicles that have high weight requirements and need to be folded and stored. Among them, the shock absorber 2 can be a hydraulic shock absorber 2 or a pneumatic shock absorber 2, and the suspension of this embodiment can be applied to all-terrain vehicles. In one embodiment, the sliding guide component 4 is disposed on the vehicle frame 10 , the vehicle frame 10 includes a mounting point of a swing arm, and the upper swing arm 1 is rotatably connected to the mounting point of the swing arm of the vehicle frame 10 .

[0019] In one embodiment, the suspension system further includes a lower swing arm 5, the upper swing arm 1 is located above the lower swing arm 5, the outer side of the lower swing arm 5 is rotatably connected to the shaft joint 3, and the inner side of the lower swing arm 5 is suitable for being rotatably connected to the vehicle body or the frame 10. In this embodiment, the upper swing arm 1 and the lower swing arm 5 are connected to the swing arm mounting point on the frame 10 and the swing arm mounting point on the shaft joint 3 by bolts, and the lower swing arm 5 can rotate in the same direction as the upper swing arm 1.

[0020] In one embodiment, the outer side and inner side of the upper swing arm 1 rotate around the first axis and the second axis respectively, the outer side and inner side of the lower swing arm 5 rotate around the third axis and the fourth axis respectively, the outer end of the shock absorber 2 rotates around the fifth axis, and the inner end of the shock absorber 2 rotates around the sixth axis. The first axis, the second axis, the third axis, the fourth axis, the fifth axis and the sixth axis all extend along the front-rear direction of the vehicle. In this embodiment, the outer side of the upper swing arm 1 is rotatably connected to the shaft joint 3 by bolts, the first axis refers to the axis of the bolts, and other rotational connection relationships are similar. The parallel arrangement of each axis facilitates the storage and deployment of the suspension system.

[0021] In one embodiment, the suspension system further includes a torsion bar spring 6, both ends of which are suitable for being mounted on the vehicle body or frame 10, the torsion bar spring 6 extending in the front-rear direction of the vehicle, the inner side of the upper swing arm 1 is connected to the torsion bar spring 6, and the upper swing arm 1 can drive the torsion bar spring 6 to twist when it rotates. The torsion bar spring 6 can provide stable suspension stiffness, help absorb bumps and vibrations on the road, and provide a smoother ride experience. The design of the torsion bar spring 6 can adapt to different vehicle loads and usage conditions, and provide stable suspension performance.

[0022] In one embodiment, the torsion bar spring 6 has a first end and a second end opposite to each other in the front-rear direction of the vehicle, and the first end and the second end are rotatably connected to the vehicle body or frame 10; The first locking device is also included. In the first position, the first locking device can lock the second end so that the second end can be temporarily fixed to the vehicle body or frame 10; in the second position, the first locking device can release the lock on the second end so that the second end can rotate relative to the vehicle body or frame 10. In this embodiment, the first end of the torsion bar spring 6 can be the front end or the rear end. When the inner end of the shock absorber 2 is in the first position, the suspension system is in the unfolded state. Under the locking of the first locking device, the first end of the torsion bar spring 6 rotates relative to the vehicle body or frame 10, and the second end of the torsion bar spring 6 is fixed relative to the vehicle body or frame 10, so that the torsion bar spring 6 can be twisted, which helps to absorb the bumps and vibrations of the road and provide a smoother riding experience. When the inner end of the shock absorber 2 is in the second position, the suspension system is in the folded state, and the first locking device releases the lock on the second end of the torsion bar spring 6, so that the torsion bar spring 6 does not undergo torsional deformation when folded, which helps to fold the suspension system. The first locking device may include a positioning pin, and mounting holes are respectively provided on the second end of the torsion bar spring 6 and the frame 10 or the vehicle body. When the inner end of the shock absorber 2 is located at the first position, the suspension system is deployed, and the positioning pin is installed in the mounting hole on the second end of the torsion spring and the mounting hole on the frame 10 or the vehicle body, thereby completing the fixing of the second end of the torsion spring and the frame 10 or the vehicle body. When the inner end of the shock absorber 2 moves from the first position to the second position, the suspension system is stored, and the positioning pin is pulled out from the mounting hole on the second end of the torsion spring and the mounting hole on the frame 10 or the vehicle body, thereby facilitating the storage of the suspension system. In other embodiments, the frame 10 or the vehicle body is provided with a first support and a second support, the first end of the torsion bar spring 6 is rotatably connected to the first support, and the second end of the torsion bar spring 6 is rotatably connected to the second support, and the second end of the torsion bar spring 6 can be temporarily fixed in the second support by the first locking device.

[0023] In one embodiment, the upper swing arm 1 includes a first arm and a second arm, the outer end of the first arm intersects with the outer end of the second arm, the first arm and the second arm gradually move away from the outside to the inside, the inner end of the first arm is fixedly connected to the first end of the torsion bar spring 6, and the inner end of the second arm is rotatably connected to the second end of the torsion bar spring 6. In this embodiment, the upper swing arm 1 and the lower swing arm 5 are both traditional A-type swing arms, including ball bearings connected to the vehicle body and the shaft joint 3, the shaft joint 3 includes a wheel 9 bearing, a steering joint connected to the upper swing arm 1 and the lower swing arm 5, and steering can be achieved by adding a motor to the steering joint or adding a steering machine and a steering tie rod installed on the vehicle body.

[0024] In one embodiment, a shock absorber upper point mounting bracket 7 is provided on the top side of the upper swing arm 1, and the outer end of the shock absorber 2 is rotatably connected to the shock absorber upper point mounting bracket 7, the outer end of the shock absorber 2 is higher than the inner end of the shock absorber 2, and a sleeve 71 is provided on the inner side of the shock absorber upper point mounting bracket 7, and the sleeve 71 is loosely sleeved on the middle outer periphery of the torsion bar spring 6, and the sleeve 71 is located below the outer end of the shock absorber 2. In this embodiment, the design that the outer end of the shock absorber 2 is higher than the inner end helps to optimize the geometric structure of the suspension, thereby improving the handling and stability of the vehicle. The design of the shock absorber upper point mounting bracket 7 and the sleeve 71 enables the shock absorber 2 to quickly respond to the up and down movement of the wheel 9, providing a better suspension response. The sleeve 71 is loosely sleeved on the middle outer periphery of the torsion bar spring 6, which reduces the interference between the torsion bar spring 6 and other suspension components, and improves the reliability of the suspension system.

[0025] In one embodiment, the suspension system further includes a second locking device for locking the sliding member 8 on the sliding guide component 4; when the second locking device is released from locking the sliding member 8, the sliding member 8 can slide between the first position and the second position along the left-right direction of the vehicle. In this embodiment, the shock absorber 2 is connected to the sliding member 8 through a bushing or a ball pin, and the second locking device includes a positioning pin. The sliding member 8 and the sliding guide component 4 are correspondingly provided with mounting holes. When the sliding member 8 slides to the desired position, the positioning pin is fixed in the mounting holes on the sliding member 8 and the sliding guide component 4 to fix the sliding member 8 and the sliding guide component 4.

[0026] In one embodiment, the sliding guide component 4 is a slide rail, which extends in the left-right direction of the vehicle. In this embodiment, the slide rail provides a precise guide path to ensure that the movement of the suspension assembly in the left-right direction is accurate and controllable. The slide rail enables the suspension assembly to respond quickly during the vehicle's driving, thereby improving the vehicle's handling and ride comfort.

[0027] In one embodiment, the slide rail includes a first guide rail 41 and a second guide rail 42, the first guide rail 41 and the second guide rail 42 are arranged in parallel and spaced apart along the front-rear direction of the vehicle, a slide groove is formed between the first guide rail 41 and the second guide rail 42, and the slide member 8 is slidably connected in the slide groove. The first guide rail 41 and the second guide rail 42 are arranged in parallel and spaced apart to provide precise guidance for the suspension assembly, ensuring the accuracy and stability of the suspension movement. The slide member 8 slides in the slide groove, which can reduce friction and wear and extend the service life of the suspension system.

[0028] In one embodiment, the sliding guide component 4 is a sliding groove provided on the vehicle body or the frame 10, the sliding groove extends in the left-right direction of the vehicle, and the sliding member 8 is slidably provided in the sliding groove. In this embodiment, the sliding groove can be directly formed on the vehicle body or the frame 10, which reduces the interference between the suspension components and improves the reliability of the suspension system.

[0029] According to the suspension system provided by the embodiment of the present invention, when the vehicle needs to travel, the outer side of the upper swing arm 1 is rotatably connected to the inner side of the shaft joint 3, so that the wheel 9 is connected to the vehicle body or frame 10, the outer end of the shock absorber 2 is rotatably connected to the upper swing arm 1, and the inner end slides in the sliding guide component 4 and moves to the first position, so that the suspension system is converted from the storage state to the deployment state. At the same time, the inner end of the shock absorber 2 is rotatably connected to the sliding member 8, and the sliding member 8 is slidably connected to the sliding guide component 4, which optimizes the lever ratio of the shock absorber 2, increases the damping force that can be provided when the suspension is working, thereby improving the damping efficiency, and the effective damping force helps to absorb the bumps and impacts of the road, and improves the ride comfort. When the vehicle needs to be folded and stored, the bottom of the shock absorber 2 moves from the first position to the second position, and the suspension system is converted from the deployment state to the storage state, reducing the space occupied by the suspension system, reducing the length of the shock absorber 2 compressed when folded and stored, and correspondingly reducing the total length of the shock absorber 2, reducing the weight of the shock absorber 2, and facilitating the folding and storage of the vehicle. That is, the suspension of the present application can be folded and stored to save space, and at the same time, the lever ratio of the shock absorber 2 can be ensured when it is unfolded and working, so as to provide sufficient damping force for the suspension.

[0030] In addition, an embodiment of the present invention provides a chassis, comprising two suspension systems of the above embodiments; One of the suspension systems is arranged on the left side of the vehicle body, and the other suspension system is arranged on the right side of the vehicle body.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A suspension system, characterized in that: It includes an upper swing arm, a shock absorber, a shaft joint, a sliding member and a sliding guide member, the shaft joint is suitable for being installed on a wheel, the outer side of the upper swing arm is rotatably connected to the shaft joint, and the inner side of the upper swing arm is suitable for being rotatably connected to a vehicle body or a frame; the sliding guide member is suitable for being installed on a vehicle body or a frame and extending along the left and right directions of the vehicle, the outer end of the shock absorber is rotatably connected to the upper swing arm, the inner end of the shock absorber is rotatably connected to the sliding member, the sliding member is slidably connected to the sliding guide member, and the sliding member can reciprocate between a first position and a second position; wherein, the second position is located on the inner side of the first position.

2. The suspension system according to claim 1, characterized in that: The suspension system also includes a lower swing arm, the upper swing arm is located above the lower swing arm, the outer side of the lower swing arm is rotatably connected to the shaft joint, and the inner side of the lower swing arm is suitable for being rotatably connected to the vehicle body or frame.

3. The suspension system according to claim 2, characterized in that: The outer side and inner side of the upper swing arm rotate around the first axis and the second axis respectively, the outer side and inner side of the lower swing arm rotate around the third axis and the fourth axis respectively, the outer end of the shock absorber rotates around the fifth axis, and the inner end of the shock absorber rotates around the sixth axis, and the first axis, the second axis, the third axis, the fourth axis, the fifth axis and the sixth axis all extend along the front and rear direction of the vehicle.

4. The suspension system according to claim 1, characterized in that: The suspension system also includes a torsion bar spring, both ends of which are suitable for installation on the vehicle body or frame. The torsion bar spring extends along the front and rear directions of the vehicle. The inner side of the upper swing arm is connected to the torsion bar spring. When the upper swing arm rotates, it can drive the torsion bar spring to twist.

5. The suspension system according to claim 4, characterized in that: The torsion bar spring has a first end and a second end opposite to each other in the front-rear direction of the vehicle, and the first end and the second end are rotatably connected to the vehicle body or the frame; It also includes a first locking device, which can lock the second end in the first position so that the second end can be temporarily fixed to the vehicle body or frame; in the second position, the first locking device can release the lock on the second end so that the second end can rotate relative to the vehicle body or frame.

6. The suspension system according to claim 5, characterized in that: The upper swing arm includes a first arm and a second arm, the outer end of the first arm intersects with the outer end of the second arm, the first arm and the second arm gradually move away from the outside to the inside, the inner end of the first arm is fixedly connected to the first end of the torsion bar spring, and the inner end of the second arm is rotatably connected to the second end of the torsion bar spring.

7. The suspension system according to claim 1, characterized in that: A shock absorber upper point mounting bracket is provided on the top side of the upper swing arm, the outer end of the shock absorber is rotatably connected to the shock absorber upper point mounting bracket, the outer end of the shock absorber is higher than the inner end of the shock absorber, a sleeve is provided on the inner side of the shock absorber upper point mounting bracket, the sleeve is hollowly sleeved on the middle outer periphery of the torsion bar spring, and the sleeve is located below the outer end of the shock absorber.

8. The suspension system according to claim 1, characterized in that: It also includes a second locking device for locking the sliding member on the sliding guide component; when the second locking device is released from locking the sliding member, the sliding member can slide between the first position and the second position along the left-right direction of the vehicle.

9. The suspension system according to claim 1, characterized in that: The sliding guide component is a slide rail, and the slide rail extends along the left-right direction of the vehicle.

10. A chassis, characterized in that: A suspension system comprising two of claims 1 to 9; One of the suspension systems is arranged on the left side of the vehicle body, and the other suspension system is arranged on the right side of the vehicle body.

Images