Ball joint device, suspension assembly and vehicle

Abstract

The application relates to the technical field of automobile suspensions, in particular to a ball hinge device, a suspension assembly and a vehicle. The ball hinge device comprises a shell unit, a bushing unit and a ball head unit. The shell unit comprises a shell body, a mounting cavity and a first oil injection hole. The bushing unit comprises a first bushing and a second bushing; the first bushing is installed at the bottom end of the mounting cavity; and the second bushing is installed at the open end of the mounting cavity. The ball head unit comprises a ball head part and a pin shaft part; the pin shaft part is connected to the surface of the ball head; the ball head part is installed in the mounting cavity and abuts against the first bushing; the second bushing abuts against the surface of the ball head part away from the first bushing; the shell body, the first bushing, the second bushing and the ball head part jointly form an annular oil storage cavity, and the first oil injection hole is communicated with the oil storage cavity. The first bushing and the second bushing are both made of metal; and the inner wall of the second bushing abuts against the ball head part through a buffer pad. Thus, the problem that the service life of the ball hinge device is short is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension technology, and more specifically, to a ball joint device, a suspension assembly, and a vehicle. Background Technology

[0002] Ball joints are typically used to connect the control arm and steering knuckle in a vehicle suspension, allowing the steering knuckle to rotate relative to the control arm during vehicle movement and steering. During operation, the ball joint bears impact loads from the wheels, steering loads, and suspension motion loads. The fit and lubrication between the ball head and bushing affect the joint's rotational flexibility, load-bearing capacity, and service life.

[0003] In related technologies, the bushing of a ball joint assembly can be made of injection-molded plastic, and the ball head is held in place by the elastic deformation of the plastic bushing. This type of structure is prone to deformation under heavy loads or long-term use, which affects the stability of the fit between the ball head and the bushing. Simultaneously, the limited storage capacity of lubricating grease inside the assembly and the inconvenience of replenishment can easily lead to insufficient local lubrication and accelerated wear. Therefore, how to improve the convenience of lubricating grease storage and replenishment while ensuring stable support of the ball head, thereby extending the service life of the ball joint assembly, has become a technical problem to be solved. Summary of the Invention

[0004] To address the problem of short service life of ball joint devices, this invention provides a ball joint device, a suspension assembly, and a vehicle.

[0005] Firstly, the ball joint device includes:

[0006] The housing unit includes a housing body, a mounting cavity, and a first oil injection hole; the mounting cavity is disposed within the housing body and has an opening that connects to the external space.

[0007] The bushing unit includes a first bushing and a second bushing; the first bushing is installed at the bottom end of the mounting cavity, and its outer peripheral surface abuts against the inner wall of the mounting cavity; the second bushing is annular, installed at the opening of the mounting cavity, and spaced apart from the first bushing.

[0008] A ball joint unit includes a ball head and a pin portion; the pin portion connects to the surface of the ball head; the ball head is installed in the mounting cavity, the inner wall of the first bushing matches the shape of the ball head, and the surface of the ball head away from the pin portion abuts against the first bushing; the second bushing abuts against the surface of the ball head away from the first bushing; the outer shell, the first bushing, the second bushing, and the ball head together form an annular oil storage cavity, and the first oil injection hole penetrates the outer shell and communicates with the oil storage cavity;

[0009] Both the first bushing and the second bushing are made of metal; the inner wall of the second bushing is provided with a cushioning pad, and the second bushing abuts against the ball head through the cushioning pad.

[0010] Optionally, the inner wall of the first bushing is recessed to form a first oil guide groove; a plurality of the first oil guide grooves are distributed around the central axis of the second bushing; the first oil guide grooves communicate with the oil storage cavity; the width direction of the first oil guide grooves is perpendicular to the central axis of the second bushing.

[0011] Optionally, the bushing unit further includes a retaining sleeve; the retaining sleeve is annular; the retaining sleeve has external threads; the retaining sleeve is connected to the open thread and abuts against the end of the second bushing away from the first bushing.

[0012] Optionally, the bushing unit further includes an elastic pad, which is disposed in the oil reservoir. A plurality of the elastic pads are distributed around the central axis of the second bushing, and the elastic pads respectively abut against the first bushing and the second bushing.

[0013] Optionally, the inner wall of the first bushing is recessed to form a plurality of second oil guide grooves; each second oil guide groove corresponds to one of the elastic pads; the second oil guide grooves are arc-shaped, and their two ends are respectively connected to the oil storage cavities on both sides of the elastic pad.

[0014] Optionally, the second oil guide groove intersects with the first oil guide groove.

[0015] Optionally, the outer peripheral surface of the first bushing includes a first abutting surface, a second abutting surface, and a third abutting surface; the first abutting surface, the second abutting surface, and the third abutting surface are connected in sequence; the first abutting surface is a plane, the second abutting surface is a conical surface, and the third abutting surface is a circular surface;

[0016] The gap between the first abutting surface and the mounting cavity is the first gap; the gap between the second abutting surface and the mounting cavity is the second gap; the gap between the third abutting surface and the mounting cavity is the third gap.

[0017] Before the ball head is assembled to the first bushing, the first gap is larger than the third gap, and the third gap is larger than the second gap;

[0018] After the ball head abuts against the first bushing, it squeezes and deforms the first bushing to eliminate the third gap.

[0019] Optionally, the first gap forms a second oil storage cavity, and the first bushing has an oil passage hole that connects the second oil storage cavity and the internal space of the first bushing.

[0020] In a second aspect, the suspension assembly proposed in this invention includes any of the ball joint devices in the first aspect, and the suspension assembly further includes a control arm, a steering knuckle, a shock absorber, and a coil spring;

[0021] The outer casing is connected to the control arm, and the pin shaft is connected to the steering knuckle, so that the steering knuckle and the control arm are rotatably connected via the ball joint device; the lower end of the shock absorber is connected to the control arm; the helical spring is sleeved on the outer periphery of the shock absorber, and the two ends of the helical spring abut against the vehicle frame and the control arm respectively.

[0022] Thirdly, the vehicle proposed in this invention includes any of the suspension assemblies in the second aspect, and the vehicle also includes a frame, wheels and a steering system;

[0023] The control arm is connected to the vehicle frame via an articulated structure; the upper end of the shock absorber is connected to the vehicle frame.

[0024] The wheel is connected to the steering knuckle; the steering system is connected to the frame and the steering knuckle respectively, and the steering system is used to drive the wheel to rotate around the ball joint to achieve steering.

[0025] To address the problem of short service life of ball joint devices, this invention has the following advantages:

[0026] The outer shell, first bushing, second bushing, and ball head together form an oil reservoir. A first oil injection hole connects to this reservoir, allowing lubricating grease to be stored near the mating area between the ball head and the bushing, and replenished via the first oil injection hole. Thus, when the ball head rotates relative to the bushing, the lubricating grease in the reservoir lubricates the mating parts, reducing wear. The first and second bushings are made of metal, possessing strong load-bearing capacity and good resistance to deformation, which helps maintain stable support for the ball head and extends the service life of the ball joint assembly.

[0027] When the vehicle is in normal operation, the first bushing supports the ball head and bears the corresponding load. Under conditions such as wheel suspension, the second bushing, through a buffer pad, engages with the ball head to support the other side of the ball head. The buffer pad cushions the contact between the second bushing and the ball head and helps reduce the impact of shocks and changes in the fit clearance on the support state of the ball head. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a ball joint device according to one embodiment;

[0029] Figure 2 for Figure 1 A cross-sectional view of the ball joint assembly;

[0030] Figure 3 for Figure 1Schematic diagram of the structure of the outer shell unit and the bushing unit;

[0031] Figure 4 for Figure 3 Cross-sectional view of the outer shell unit and the bushing unit;

[0032] Figure 5 for Figure 3 A schematic diagram of the structure of the first bushing, the second bushing, and the fixed sleeve.

[0033] Reference numerals: 10, outer casing unit; 11, outer casing body; 12, first oil inlet hole; 20, bushing unit; 21, first bushing; 211, first oil guide groove; 212, second oil guide groove; 213, first abutment surface; 214, second abutment surface; 215, third abutment surface; 216, oil passage hole; 217, oil reservoir; 22, second bushing; 23, fixing sleeve; 24, elastic pad; 25, buffer pad; 30, ball head unit; 31, ball head; 32, pin shaft part; 40, first oil reservoir cavity; 50, second oil reservoir cavity. Detailed Implementation

[0034] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0035] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0036] Ball joints are typically used at the connection point between the control arm and steering knuckle of a vehicle suspension. They allow the steering knuckle to rotate relative to the control arm during vehicle movement and steering. During operation, the ball joint bears impact loads transmitted from the wheels, steering loads, and suspension motion loads. The fit and lubrication status between the ball head and the bushing unit directly affect the ball joint's rotational flexibility, load-bearing capacity, and service life. In existing ball joint technologies, the bushing unit uses a plastic injection-molded structure, relying on the elastic deformation of the plastic bushing to hold the ball head. This structure is prone to deformation under heavy loads or prolonged use, leading to decreased stability in the fit between the ball head and the bushing unit. Furthermore, the existing structure has a limited capacity for storing lubricating grease, making grease replenishment inconvenient and prone to localized lubrication deficiencies, further exacerbating wear at the mating points. Therefore, the ball joint cannot simultaneously achieve stable support for the ball head and convenient lubrication storage and replenishment, hindering the improvement of its service life.

[0037] Example 1:

[0038] like Figure 1 and Figure 2 As shown, this embodiment provides a ball joint device, including a housing unit 10, a bushing unit 20, and a ball joint unit 30. The housing unit 10 includes a housing body 11, a mounting cavity disposed within the housing body 11, and a first oil injection hole 12. The mounting cavity has an opening facing the external space. The bushing unit 20 includes a first bushing 21 and a second bushing 22. The first bushing 21 is installed at the bottom end of the mounting cavity, and its outer peripheral surface abuts against the inner wall of the mounting cavity. The second bushing 22 is annular and is installed at the opening of the mounting cavity, and is spaced apart from the first bushing 21.

[0039] The ball head unit 30 includes a ball head 31 and a pin portion 32, with the pin portion 32 connected to the ball head 31. The ball head 31 is installed in the mounting cavity. The inner wall of the first bushing 21 matches the shape of the outer surface of the ball head 31, and the surface of the ball head 31 away from the pin portion 32 abuts against the first bushing 21. The second bushing 22 abuts against the surface of the ball head 31 away from the first bushing 21. The outer shell 11, the first bushing 21, the second bushing 22, and the ball head 31 together form a first oil storage cavity 40. The first oil injection hole 12 penetrates the outer shell 11 and communicates with the first oil storage cavity 40. Both the first bushing 21 and the second bushing 22 are made of metal. The inner wall of the second bushing 22 is provided with a buffer pad 25, and the second bushing 22 abuts against the ball head 31 through the buffer pad 25. The buffer pad 25 has a certain deformation capacity. After the position of the second bushing 22 is locked, the second bushing 22 elastically abuts against the ball head 31. In this way, even if vibration occurs during driving, the effective abutment between the second bushing 22 and the ball head 31 can be ensured, eliminating the gap between the second bushing 22 and the ball head 31, and ensuring the stable fit between the second bushing 22 and the ball head 31.

[0040] During normal vehicle operation, the ball joint 31 engages with the first bushing 21, providing primary support for the ball joint 31. When the vehicle experiences bumps and the wheels become suspended in the air, the second bushing 22 contacts and supports the ball joint 31 via the buffer pad 25. The elastic force of the buffer pad 25 absorbs vibrations, preventing severe localized wear caused by rigid collisions between the second bushing 22 and the ball joint 31. Furthermore, compared to the rigid metal second bushing 22, the buffer pad 25 has less friction with the ball joint 31, thus extending the service life of the bushing unit 20. The first oil reservoir 40 contains lubricating grease, which enters the mating areas between the ball joint 31 and the first bushing 21, and between the ball joint 31 and the second bushing 22, reducing friction between the ball joint 31 and the bushing unit 20. The lubricating grease in the first oil reservoir 40 can be replenished through the first oil filling hole 12, facilitating maintenance of the ball joint assembly. The first bushing 21 and the second bushing 22, made of metal, have strong load-bearing capacity and resistance to deformation. Combined with the continuous supply of lubricating grease, they help reduce wear on mating parts and extend the service life of the ball joint assembly.

[0041] This embodiment achieves three functional zones—rigid top support, oil storage area, and elastic buffer zone—through the sequential arrangement of the first bushing 21, the first oil storage cavity 40, and the second bushing 22. This not only provides a large load-bearing capacity but also effectively eliminates mating gaps and ensures top lubrication.

[0042] In other embodiments, a layer of polytetrafluoroethylene or polyetheretherketone material may be sprayed onto the inner wall of the second bushing to form a cushioning pad 25.

[0043] Furthermore, such as Figures 3 to 5 As shown, the inner wall of the first bushing 21 is recessed to form multiple first oil guide grooves 211, which extend from the port position of the first bushing 21 towards the apex of the arc. The multiple first oil guide grooves 211 are distributed around the central axis of the second bushing 22, and are connected to the first oil reservoir 40. The width direction of the first oil guide grooves 211 is perpendicular to the central axis of the second bushing 22. Through this arrangement, the lubricating grease in the first oil reservoir 40 can be delivered along the first oil guide grooves 211 to multiple mating positions between the ball head 31 and the first bushing 21, thereby achieving more uniform oil supply and reducing localized wear.

[0044] Furthermore, the bushing unit 20 also includes a retaining sleeve 23, which is annular and has external threads. The retaining sleeve 23 is threadedly connected to the open end of the mounting cavity, and abuts against the end of the second bushing 22 away from the first bushing 21. During assembly, the second bushing 22 can be axially positioned by tightening the retaining sleeve 23, thereby reducing the fit clearance between the second bushing 22 and the ball head 31 and facilitating the positioning of the second bushing 22.

[0045] In other embodiments, the clamping force between the ball head 31 and the bushing unit 20 can be steplessly adjusted by tightening the retaining sleeve 23. This allows for control of the initial swing torque and rotational torque of the ball head 31 by adjusting the clamping force between the ball head 31 and the bushing unit 20 for different specifications of the outer shell unit 10 and the ball head unit 30. Furthermore, when the bushing unit 20 wears down, a gap may form between the bushing unit 20 and the ball head 31. This gap can be eliminated by further tightening the retaining sleeve 23, thus enabling maintenance of the ball joint device.

[0046] In other embodiments, after tightening the retaining sleeve 23, the threads of the retaining sleeve 23 and the opening are deformed by hammering, thereby preventing the retaining sleeve 23 from rotating relative to the outer shell during the subsequent driving of the vehicle, ensuring the position of the retaining sleeve 23, and improving the stability of the ball joint device during operation.

[0047] Furthermore, the bushing unit 20 also includes a plurality of elastic pads 24, which are disposed within the first oil reservoir 40 and distributed around the central axis of the second bushing 22; each elastic pad 24 abuts against the first bushing 21 and the second bushing 22 respectively. The elastic pads 24 can provide elastic support and preload to the second bushing 22, and play a buffering role during the engagement of the ball head 31 with the second bushing 22, so as to improve the positional stability of the second bushing 22 and reduce the possibility of loosening.

[0048] Furthermore, the first bushing 21 also has a plurality of second oil guide grooves 212, each second oil guide groove 212 corresponding to an elastic pad 24. The second oil guide grooves 212 are arc-shaped, and their two ends are respectively connected to the first oil storage chambers 40 on both sides of the elastic pad 24. Since the elastic pad 24 forms a partial gap between the first oil storage chambers 40 in the circumferential direction, the second oil guide grooves 212 can connect the oil storage spaces on both sides to maintain the flow of lubricating grease and prevent local grease depletion.

[0049] Furthermore, such as Figure 3 As shown, when the second oil guide groove 212 intersects with the first oil guide groove 211, the two can form a connected oil guide path. Compared with the first oil guide groove 211 and the second oil guide groove 212 being spaced apart, this embodiment can reduce the groove area while ensuring the oil guide function, which is beneficial to maintaining the effective contact area between the first bushing 21 and the ball head 31.

[0050] Furthermore, such as Figure 5 As shown, the outer peripheral surface of the first bushing 21 sequentially includes a first abutting surface 213, a second abutting surface 214, and a third abutting surface 215. The first abutting surface 213 is a plane, the second abutting surface 214 is a conical surface, and the third abutting surface 215 is a circular surface. A first gap is formed between the first abutting surface 213 and the mounting cavity, a second gap is formed between the second abutting surface 214 and the mounting cavity, and a third gap is formed between the third abutting surface 215 and the mounting cavity. Before the ball head 31 is assembled to the first bushing 21, the first gap is larger than the third gap, and the third gap is larger than the second gap. After the ball head 31 abuts against the first bushing 21, it applies a compressive force to the first bushing 21, causing the first bushing 21 to deform accordingly and eliminating the third gap. The tapered second abutment surface 214 helps to improve the positioning accuracy of the first bushing 21 in the mounting cavity, and the cooperation of the first abutment surface 213, the second abutment surface 214 and the third abutment surface 215 helps to improve the tightness of the fit between the first bushing 21 and the outer shell 11.

[0051] Furthermore, such as Figure 4 As shown, the first gap forms a second oil reservoir 50, and an oil passage 216 is provided on the first bushing 21, which connects the second oil reservoir 50 and the internal space of the first bushing 21. The second oil reservoir 50 can increase the capacity of lubricating grease, and the lubricating grease can enter the internal space of the first bushing 21 through the oil passage 216 to further improve the lubrication conditions between the ball head 31 and the first bushing 21.

[0052] In other embodiments, the inner wall of the first bushing 21 is recessed to form a plurality of oil storage pits 217, which can hold lubricating grease and reduce the friction between the ball head 31 and the first bushing 21.

[0053] Example 2:

[0054] This embodiment also provides a suspension assembly, including any of the ball joint devices in Embodiment 1; the suspension assembly further includes a control arm, a steering knuckle, a shock absorber, and a coil spring. The outer housing 11 is connected to the control arm, and the pin portion is connected to the steering knuckle, so that the steering knuckle and control arm are rotatably connected via the ball joint device. The lower end of the shock absorber is connected to the control arm. The coil spring is sleeved on the outer periphery of the shock absorber, and its two ends abut against the vehicle body and the control arm, respectively. Through the ball joint device, the steering knuckle can rotate relative to the control arm to accommodate suspension movement and vehicle steering.

[0055] Example 3:

[0056] This embodiment also provides a vehicle, including any of the suspension assemblies in Embodiment Two; the vehicle also includes a frame, wheels, and a steering system. The control arm is connected to the frame via an articulated structure. The upper end of the shock absorber is connected to the frame. The wheels are connected to the steering knuckles. The steering system is connected to the frame and the steering knuckles respectively, and is used to drive the wheels to rotate around the ball joint device to achieve steering. Because the suspension assembly uses the aforementioned ball joint device, the load-bearing capacity of the metal bushing and the lubricating grease storage and replenishment capacity of the oil reservoir can be utilized to improve the stability and service life of the ball joint device during vehicle use.

[0057] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A ball joint device, characterized in that, The ball joint device includes: The housing unit includes a housing body, a mounting cavity, and a first oil injection hole; the mounting cavity is disposed within the housing body and has an opening that connects to the external space. The bushing unit includes a first bushing and a second bushing; the first bushing is installed at the bottom end of the mounting cavity, and its outer peripheral surface abuts against the inner wall of the mounting cavity; the second bushing is annular, installed at the opening of the mounting cavity, and spaced apart from the first bushing. A ball joint unit includes a ball head and a pin portion; the pin portion connects to the surface of the ball head; the ball head is installed in the mounting cavity, the inner wall of the first bushing matches the shape of the ball head, and the surface of the ball head away from the pin portion abuts against the first bushing; the second bushing abuts against the surface of the ball head away from the first bushing; the outer shell, the first bushing, the second bushing, and the ball head together form an annular oil storage cavity, and the first oil injection hole penetrates the outer shell and communicates with the oil storage cavity; Both the first bushing and the second bushing are made of metal; the inner wall of the second bushing is provided with a cushioning pad, and the second bushing abuts against the ball head through the cushioning pad.

2. The ball joint device according to claim 1, characterized in that, The inner wall of the first bushing is recessed to form a first oil guide groove; a plurality of the first oil guide grooves are distributed around the central axis of the second bushing; the first oil guide grooves are connected to the oil storage cavity; the width direction of the first oil guide grooves is perpendicular to the central axis of the second bushing.

3. The ball joint device according to claim 2, characterized in that, The bushing unit further includes a fixing sleeve; the fixing sleeve is arranged in a ring shape; the fixing sleeve is provided with external threads; the fixing sleeve is connected to the open thread and abuts against the end of the second bushing away from the first bushing.

4. A ball joint device according to claim 3, characterized in that, The bushing unit also includes an elastic pad, which is disposed in the oil storage cavity. A plurality of elastic pads are distributed around the central axis of the second bushing, and the elastic pads respectively abut against the first bushing and the second bushing.

5. A ball joint device according to claim 4, characterized in that, The inner wall of the first bushing is recessed to form a plurality of second oil guide grooves; each second oil guide groove corresponds to one of the elastic pads; the second oil guide grooves are arc-shaped and their two ends are respectively connected to the oil storage cavities on both sides of the elastic pad.

6. A ball joint device according to claim 5, characterized in that, The second oil guide groove intersects with the first oil guide groove.

7. A ball joint device according to claim 1, characterized in that, The outer peripheral surface of the first bushing includes a first abutting surface, a second abutting surface, and a third abutting surface; the first abutting surface, the second abutting surface, and the third abutting surface are connected in sequence; the first abutting surface is a plane, the second abutting surface is a conical surface, and the third abutting surface is a circular surface; The gap between the first abutting surface and the mounting cavity is the first gap; the gap between the second abutting surface and the mounting cavity is the second gap; the gap between the third abutting surface and the mounting cavity is the third gap. Before the ball head is assembled to the first bushing, the first gap is larger than the third gap, and the third gap is larger than the second gap; After the ball head abuts against the first bushing, it squeezes and deforms the first bushing to eliminate the third gap.

8. A ball joint device according to claim 7, characterized in that, The first gap forms a second oil storage cavity, and the first bushing has an oil passage hole that connects the second oil storage cavity and the internal space of the first bushing.

9. A suspension assembly comprising the ball joint device according to any one of claims 1-8, characterized in that, The suspension assembly also includes a control arm, a steering knuckle, a shock absorber, and a coil spring; The outer casing is connected to the control arm, and the pin shaft is connected to the steering knuckle, so that the steering knuckle and the control arm are rotatably connected via the ball joint device; the lower end of the shock absorber is connected to the control arm; the helical spring is sleeved on the outer periphery of the shock absorber, and the two ends of the helical spring abut against the vehicle frame and the control arm respectively.

10. A vehicle comprising the suspension assembly of claim 9, characterized in that, The vehicle also includes a frame, wheels, and a steering system; The control arm is connected to the vehicle frame via a hinge structure; the upper end of the shock absorber is connected to the vehicle frame; the wheel is connected to the steering knuckle; the steering system is connected to the vehicle frame and the steering knuckle respectively, and the steering system is used to drive the wheel to rotate around the ball joint device to achieve steering.

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