Swing arm structure, suspension system and vehicle

Abstract

The utility model discloses a swing arm structure, a suspension system and a vehicle, and belongs to the technical field of vehicles. The swing arm structure comprises a power assembly, a first movable part and a second movable part. The power assembly is provided with a first limiting part. The first movable part is in coupling connection with the power assembly and is provided with a second limiting part, and the second limiting part is matched with the first limiting part so as to limit displacement of the first movable part along the first axis relative to the power assembly; one end of the second movable part is connected to the first movable part; one end of the second movable part is connected to the first movable part, and under the condition that the output end of the power assembly drives the first movable part to rotate around the first axis, the second movable part moves along the first axis relative to the first movable part. The use reliability of the swing arm structure is ensured while the length of the first axis of the swing arm structure is adjustable, so that a hardware basis is provided for a vehicle to adjust the length of the swing arm structure according to variable road conditions and different vehicle load conditions, and the stability and comfort of vehicle driving are improved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular relates to a swing arm structure, a suspension system and a vehicle. Background Art

[0002] In modern automotive design, the swing arm, as a key component of the suspension system, has a crucial impact on the vehicle's handling stability and driving performance. However, current swing arms have limitations in providing stable handling performance, especially under variable road conditions and vehicle load conditions, which affects vehicle driving stability. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a swing arm structure, a suspension system, and a vehicle, which achieve adjustable length of the swing arm structure along a first axis while ensuring the reliability of the swing arm structure. This provides a hardware foundation for adjusting the length of the swing arm structure according to varying road conditions and vehicle load conditions, thereby improving vehicle driving stability and comfort.

[0004] In a first aspect, the present application provides a swing arm structure, which is applied to a suspension system. The swing arm structure includes:

[0005] A power assembly, wherein a fixed end of the power assembly is used to connect to the subframe of the suspension system, and the power assembly has a first limiting portion;

[0006] a first movable member coupled to the power assembly, and having a second limiting portion, the second limiting portion cooperating with the first limiting portion to limit the displacement of the first movable member relative to the power assembly along the first axis;

[0007] A second movable member, one end of the second movable member is connected to the first movable member, and the other end is used to connect to the steering knuckle of the suspension system. When the output end of the power component drives the first movable member to rotate around the first axis, the second movable member moves along the first axis relative to the first movable member.

[0008] According to the swing arm structure of the present application, the first movable member rotates about the first axis via the power assembly, thereby driving the second movable member to move relative to the first movable member along the first axis. This allows the swing arm structure to dynamically adjust the length of the entire swing arm structure along the first axis based on driving conditions and road conditions, thereby optimizing the vehicle's handling stability. Simultaneously, the first and second limiting portions limit the displacement of the first movable member relative to the power assembly along the first axis, ensuring that the movement of the first movable member is within a safe and effective range, thereby reducing damage to the power assembly structure caused by excessive displacement due to excessive compression or tension, as well as the possibility of separation between the first movable member and the power assembly.

[0009] According to one embodiment of the present application, a limiting boss is formed on the inner side wall of the shell of the power assembly along the circumferential direction, and the limiting boss is arranged near the end of the shell away from the sub-frame. The limiting boss is sleeved on the outside of the first movable part and cooperates with the second limiting part, and the first limiting part includes the limiting boss.

[0010] According to one embodiment of the present application, the first movable member includes:

[0011] The first section is located in the housing and is transmission-connected to the output end of the power assembly;

[0012] a second section, movably connected to the second movable member;

[0013] The third section is arranged between the first section and the second section, and the outer diameter of the third section is smaller than the outer diameter of the first section and the outer diameter of the second section respectively. The limiting boss is sleeved outside the third section, and the second limiting portion includes two end surfaces of the first section and the second section that are close to each other.

[0014] According to one embodiment of the present application, the first movable member includes:

[0015] The first section is located in the housing and is transmission-connected to the output end of the power assembly;

[0016] The second section is provided at an end of the first section away from the power assembly, the outer diameter of the first section is larger than the outer diameter of the second section, and the limiting boss is sleeved outside the second section and is suitable for abutting and cooperating with the first section;

[0017] The limiting ring is sleeved outside the second section and is suitable for abutting and cooperating with the limiting boss. The second limiting portion includes two end surfaces of the first section and the limiting ring that are close to each other.

[0018] According to one embodiment of the present application, a limiting groove is formed on the outer side wall of the second section along the circumferential direction, and the limiting groove and the end of the second section close to the first section are spaced apart, and the limiting ring is partially arranged in the limiting groove and is suitable for abutting and cooperating with the limiting boss.

[0019] According to one embodiment of the present application, the power assembly includes:

[0020] case;

[0021] a rotary driving member disposed in the housing, wherein an output end of the rotary driving member is transmission-connected to the first movable member;

[0022] A limiting member is provided between the housing and the fixed end of the rotary driving member, and is used to limit the relative movement between the housing and the fixed end of the rotary driving member.

[0023] According to one embodiment of the present application, it further includes:

[0024] The protective cover is movably sleeved outside the second movable member and is connected to an end of the first movable member away from the power assembly.

[0025] According to one embodiment of the present application, the cross-sectional area of ​​the protective cover along the first axis and close to the power assembly is monotonically non-decreasing; and / or

[0026] The first movable member is provided with an internal thread, the second movable member is partially located in the first movable member and is provided with an external thread matching the internal thread, and the inner diameter of the protective cover is smaller than the outer diameter of the external thread.

[0027] In a second aspect, the present application provides a suspension system, comprising:

[0028] subframe;

[0029] Steering knuckle;

[0030] and at least one swing arm structure as described above, wherein the swing arm structure is connected to the subframe and the steering knuckle respectively.

[0031] The suspension system of the present application improves the adaptability and flexibility to changing road conditions and different vehicle load conditions, and improves the stability and comfort of vehicle driving.

[0032] In a third aspect, the present application provides a vehicle comprising the suspension system as described above.

[0033] The suspension system of the present application improves the adaptability and flexibility to changing road conditions and different vehicle load conditions, and improves the stability and comfort of vehicle driving.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 This is one of the structural schematic diagrams of the first swing arm structure provided in the embodiment of the present application;

[0037] Figure 2This is the second structural diagram of the first swing arm structure provided in the embodiment of the present application;

[0038] Figure 3 This is the third structural diagram of the first swing arm structure provided in the embodiment of the present application;

[0039] Figure 4 This is the fourth structural diagram of the first swing arm structure provided in the embodiment of the present application;

[0040] Figure 5 This is one of the structural diagrams of the second swing arm structure provided in the embodiment of the present application;

[0041] Figure 6 This is the second structural diagram of the second swing arm structure provided in the embodiment of the present application;

[0042] Figure 7 It is a structural diagram of the suspension system provided in an embodiment of the present application.

[0043] Reference numerals:

[0044] 10. Swing arm structure; 20. Subframe;

[0045] 100. Power assembly; 110. Housing; 111. Limiting boss;

[0046] 120, rotary drive member; 121, housing; 1211, mounting hole; 122, output shaft;

[0047] 130, limiter;

[0048] 200, first movable member;

[0049] 210, first section; 220, second section; 221, connecting hole; 230, third section; 240, limiting ring;

[0050] 300, second movable member; 301, external thread;

[0051] 400, protective cover;

[0052] 500, bushing; 600, ball head. DETAILED DESCRIPTION

[0053] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0054] Reference below Figure 1-Figure 7The swing arm structure 10 provided in an embodiment of the present application is described. The swing arm structure 10 is applied to a suspension system. The swing arm structure 10 includes a power assembly 100 , a first movable member 200 , and a second movable member 300 .

[0055] The fixed end of the power assembly 100 is used to connect to the subframe 20 of the suspension system to provide the power required by the entire swing arm structure 10. The power assembly 100 also has a first stop. For example, the power assembly 100 is connected to the subframe 20 via a bushing 500 to adapt to the dynamic changes of the vehicle during driving.

[0056] The first movable member 200 is coupled to the power assembly 100 and has a second limiting portion that cooperates with the first limiting portion to limit the displacement of the first movable member 200 relative to the power assembly 100 along the first axis. One end of the second movable member 300 is connected to the first movable member 200, and the other end is used to connect to the steering knuckle of the suspension system. When the output end of the power assembly 100 drives the first movable member 200 to rotate about the first axis, the second movable member 300 moves relative to the first movable member 200 along the first axis. Exemplarily, the second movable member 300 is connected to the steering knuckle via one of the bushing 500 and the ball head 600.

[0057] It will be appreciated that the first movable member 200 rotates about the first axis via the power assembly 100, thereby driving the second movable member 300 to move relative to the first movable member 200 along the first axis. This, in turn, enables the swing arm structure 10 to dynamically adjust the length of the entire swing arm structure 10 along the first axis according to driving conditions and road conditions, thereby optimizing the vehicle's handling stability. Simultaneously, the first and second limiters limit the displacement of the first movable member 200 relative to the power assembly 100 along the first axis, ensuring that the movement of the first movable member 200 is within a safe and effective range. This reduces the possibility of damage to the power assembly 100 structure caused by excessive displacement due to excessive compression or tension, as well as the possibility of separation between the first movable member 200 and the power assembly 100.

[0058] According to the swing arm structure 10 provided in the embodiment of the present application, the length of the swing arm structure 10 on the first axis is adjustable while ensuring the reliability of the use of the swing arm structure 10, thereby providing a hardware foundation for the vehicle to adjust the length of the swing arm structure 10 according to changing road conditions and different vehicle load conditions, thereby improving the stability and comfort of vehicle driving.

[0059] In some embodiments, as Figures 1 to 6As shown, the power assembly 100 includes a housing 110, a rotary drive member 120, and a stopper 130. The rotary drive member 120 is disposed within the housing 110, and an output shaft 122 of the rotary drive member 120 is in driving connection with the first movable member 200. The stopper 130 is disposed between the housing 110 and the fixed end of the rotary drive member 120 to limit relative movement between the housing 110 and the fixed end of the rotary drive member 120. The rotary drive member 120 includes, but is not limited to, a drive motor.

[0060] It should be noted that the connection between the output shaft 122 of the drive motor and the first movable member 200 is the output end of the power assembly 100, and the housing 121 of the drive motor is the fixed end of the power assembly 100. The connection between the housing 121 and the housing 110 includes, but is not limited to, threaded connection, snap connection, or plug-in connection.

[0061] It will be appreciated that the housing 110 forms a receiving cavity with two open ends along the first axis. The rotary drive member 120 and the first movable member 200 are partially disposed within the receiving cavity to withstand the mechanical stress generated during vehicle operation and reduce the impact of the environment on the rotary drive member 120 and the first movable member 200, thereby maximizing the service life of the swing arm structure 10. Furthermore, the use of the stop member 130 reduces the possibility of the housing 121 rotating about the first axis or moving along the first axis relative to the housing 110, thereby helping to reduce the additional friction, wear, and energy loss caused by unnecessary movement of the housing 121, thereby improving the stability and reliability of the power assembly 100.

[0062] In addition, the rotating drive member 120 utilizes the output shaft 122 to convert the input power into the rotational motion of the first movable member 200, and at the same time utilizes the matching first limit portion and second limit portion to constrain the movement range of the first movable member 200 relative to the shell 110 along the first axis, so that the output shaft 122 only needs to output torque as much as possible, reducing the possibility of the output shaft 122 being subjected to tension or pressure due to the change in the length of the swing arm structure 10, helping to protect the output shaft 122, improve the reliability and service life of the power component 100, and reduce the risk of failure of the swing arm structure 10 due to mechanical failure.

[0063] In some embodiments, a lubricant is provided between the inner wall of the housing 110 and the outer wall of the casing 121 to reduce direct contact between the housing 110 and the casing 121, thereby reducing friction and abnormal noise. The material of the lubricant includes, but is not limited to, rubber.

[0064] In some embodiments, as Figures 1 to 4As shown, the limiting member 130 includes a locking pin. A positioning through-hole is defined in the housing 110, the axis of which is perpendicular to the first axis. A mounting hole 1211 is defined in the casing 121. One end of the locking pin passes through the positioning through-hole and engages with the mounting hole 1211, thereby limiting the casing 121 in both the circumferential and axial directions. It should be noted that the shape and size of the positioning through-hole and the mounting hole 1211 can be designed according to actual needs and are not specifically limited in this embodiment.

[0065] In some embodiments, the locking pin is stepped; and / or

[0066] The locking pin and the mounting hole 1211 are screwed together to enhance the stability and limiting ability of the locking pin, thereby improving the connection strength and stability between the housing 110 and the casing 121 .

[0067] In some embodiments, the limiting member 130 further includes a step disposed in the housing 110 , which abuts against the outer wall of the casing 121 to limit the casing 121 along the first axis, thereby helping to achieve precise positioning and extend the service life of the power assembly 100 .

[0068] In some embodiments, as Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the output shaft 122 has an external hexagonal shape, while the end of the first movable member 200 distal from the steering knuckle has an internal hexagonal shape. The output shaft 122 is inserted into the internal hexagonal end of the first movable member 200. This means that the internal and external hexagonal plug-in connection between the rotary drive member 120 and the first movable member 200 facilitates assembly and disassembly while providing a good mechanical connection, ensuring stable and reliable power transmission. Furthermore, the combination of the internal and external hexagonal design provides excellent self-locking properties, reducing the risk of loosening under vibration or impact loads. Of course, in other embodiments, the output shaft 122 may also have a polygonal shape, such as a square or octagonal shape, and this embodiment does not impose any specific limitations on this.

[0069] In other embodiments, the output shaft 122 and the first movable member 200 may also be connected via gear meshing, which helps to evenly distribute the load and reduce local stress concentration, thereby improving the strength and durability of the connection between the rotary drive member 120 and the first movable member 200.

[0070] In some embodiments, as Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the first movable member 200 is provided with an internal thread, and the second movable member 300 is partially located inside the first movable member 200 and is provided with an external thread 301 that matches the internal thread. The second movable member 300 includes but is not limited to a worm.

[0071] It is understood that the first movable member 200 is provided with a connecting hole 221 extending along the first axis, and the inner edge of the connecting hole 221 is provided with an internal thread. The second movable member 300 is partially located within the first movable member 200, and the outer wall portion of the second movable member 300 near the power assembly 100 is provided with an external thread 301 that cooperates with the internal thread. The first movable member 200 rotates about the first axis, and the cooperation between the external thread 301 and the internal thread drives the second movable member 300 to reciprocate along the first axis, thereby changing the length of the second movable member 300 extending into the first movable member 200. This achieves the conversion from rotational motion to linear motion within a relatively small space, not only precisely controlling the length of the second movable member 300 extending into and out of the first movable member 200, but also improving transmission efficiency.

[0072] In some embodiments, as Figures 1 to 6 As shown, the swing arm structure 10 further includes a protective cover 400, which is movably mounted outside the second movable member 300 and connected to the end of the first movable member 200 away from the power assembly 100. The protective cover 400 may be made of, but is not limited to, metal or plastic. The connection between the protective cover 400 and the first movable member 200 may include, but is not limited to, threaded connection, snap-fit ​​connection, or plug-in connection.

[0073] It can be understood that by moving the protective cover 400 so as to be mounted outside the second movable part 300 and connected to the first movable part 200, not only the possibility of the second movable part 300 being separated from the first movable part 200 can be reduced, but also the sealing and protection functions can be played, thereby reducing the possibility of external pollutants (such as mud, water or dust) adhering to the first movable part 200 and entering the second movable part 300.

[0074] In some embodiments, as Figures 1 to 6 As shown, the cross-sectional area of ​​the protective cover 400 along the first axis and close to the power assembly 100 is monotonically decreasing.

[0075] It can be understood that the protective cover 400 is cone-shaped with both ends open, and the large diameter end of the protective cover 400 is sleeved on the end of the first movable part 200, which helps to reduce air resistance and noise, avoid the possibility of pollutants entering the first movable part 200 from the connection between the protective cover 400 and the first movable part 200, and extend the service life of the swing arm structure 10.

[0076] In some embodiments, as Figures 1 to 6 As shown, the inner diameter of the protective cover 400 is smaller than the outer diameter of the external thread 301, so that the portion of the second movable part 300 provided with the external thread 301 is always located inside the first movable part 200, ensuring that the second movable part 300 moves relative to the protective cover 400 along the first axis while avoiding the possibility that the end of the second movable part 300 away from the steering knuckle passes through the protective cover 400 and detaches from the first movable part 200.

[0077] In some embodiments, as Figure 2 and Figure 5 As shown, a limiting boss 111 is formed on the inner side wall of the shell 110 of the power assembly 100 along the circumferential direction. The limiting boss 111 is arranged near the end of the shell 110 away from the sub-frame 20. The limiting boss 111 is sleeved on the outside of the first movable part 200 and cooperates with the second limiting portion. The first limiting portion includes the limiting boss 111.

[0078] It is understood that the limiting boss 111 is disposed on the inner sidewall of the housing 110, and one end of the first movable member 200 extends into the housing 110 so that the limiting boss 111 can be sleeved outside the first movable member 200 and cooperate with the second limiting portion, thereby ensuring that the first movable member 200 rotates only about the first rotation axis relative to the housing 110 as much as possible. At the same time, because the limiting boss 111 is disposed circumferentially along the inner sidewall of the housing 110, that is, the limiting boss 111 is annular, it provides all-round restriction on the first movable member 200, ensuring uniform force and reducing stress concentration.

[0079] In some embodiments, as Figure 2 and Figure 5 As shown, the limiting boss 111 is located at the end of the shell 110 away from the sub-frame 20, that is, the outer end surface of the limiting boss 111 and the corresponding end surface of the shell 110 are spliced ​​together to form a continuous plane, which helps to provide stable support and limiting effects on the first movable part 200, reduce gaps and unevenness, and thus improve the stability and reliability of the overall structure.

[0080] The following describes in detail how the second limiting portion and the limiting boss 111 are coordinated with each other in accordance with an embodiment of the present application from two different perspectives.

[0081] 1. As Figures 1 to 4 As shown, the first movable part 200 includes a first section 210, a second section 220 and a third section 230. The first section 210 is located in the shell 110 and is transmission-connected to the output end of the power component 100; the second section 220 is movably connected to the second movable part 300; the third section 230 is arranged between the first section 210 and the second section 220, and the outer diameter of the third section 230 is smaller than the outer diameter of the first section 210 and the outer diameter of the second section 220, respectively. The limiting boss 111 is sleeved on the outside of the third section 230, and the second limiting portion includes two end surfaces of the first section 210 and the second section 220 that are close to each other.

[0082] It should be noted that the connection hole 221 is provided in the second section 220 , which reduces the possibility of stress concentration in the first section 210 and the third section 230 and reduces the risk of fatigue fracture.

[0083] It can be understood that along the first axis, the first section 210, the third section 230 and the second section 220 are connected in sequence. Since the outer diameter of the third section 230 is smaller than the outer diameter of the first section 210 and the outer diameter of the second section 220, respectively, the limiting boss 111 is arranged outside the third section 230, and the two end faces of the first section 210 and the second section 220 that are close to each other can respectively abut against the two end faces of the limiting boss 111, that is, the displacement range of the first movable part 200 relative to the shell 110 is limited by the length difference between the third section 230 and the limiting boss 111 along the first axis.

[0084] It should be noted that if Figure 3 and Figure 4 As shown, the limiting boss 111 includes two half bosses, and the shell 110 includes two half shells, and both half shells form half bosses, that is, the rotating drive member 120 and the first movable member 200 connected together are first installed on one of the half shells, and the outer wall portion of the third section 230 is abutted against the inner wall of the half boss of the half shell, and then the other half shell is spliced ​​on the half shell, and the two half bosses are aligned to form a complete limiting boss 111, and the two half shells are connected by welding or other connection methods, thereby realizing the assembly of the swing arm structure 10 while ensuring the stability and strength of the swing arm structure 10 under high load conditions.

[0085] In some embodiments, as Figure 2 and Figure 3 As shown, the outer diameter of the first section 210 is smaller than the outer diameter of the second section 220, and the outer diameter of the second section 220 is equal to the outer diameter of the shell 110, so that the outer wall of the shell 110 and the outer wall of the second section 220 can form a continuous and smooth outer surface, which helps to enhance the stability of the entire swing arm structure 10, ensure accurate alignment during assembly, and reduce assembly errors.

[0086] 2. If Figure 5 and Figure 6 As shown, the first movable part 200 includes a first section 210, a second section 220 and a limiting ring 240. The first section 210 is located in the shell 110 and is transmission-connected to the output end of the power assembly 100; the second section 220 is arranged at the end of the first section 210 away from the power assembly 100, the outer diameter of the first section 210 is larger than the outer diameter of the second section 220, the limiting boss 111 is sleeved outside the second section 220 and is suitable for abutting and cooperating with the first section 210; the limiting ring 240 is sleeved outside the second section 220 and is suitable for abutting and cooperating with the limiting boss 111, and the second limiting portion includes two end surfaces of the first section 210 and the limiting ring 240 that are close to each other.

[0087] It should be noted that the connection hole 221 is provided in the second section 220 to reduce the possibility of stress concentration in the first section 210 and reduce the risk of fatigue fracture.

[0088] It can be understood that the first section 210 and the second section 220 are connected in sequence, and the limiting ring 240 is sleeved on the second section 220 and spaced apart from the end of the second section 220. Since the outer diameter of the first section 210 is larger than the outer diameter of the second section 220, the limiting boss 111 is sleeved outside the second section 220, and the end face of the first section 210 close to the second section 220 and the end face of the limiting ring 240 close to the first section 210 can respectively abut against the two end faces of the limiting boss 111, that is, the displacement range of the first movable part 200 relative to the shell 110 is limited by the difference between the distance between the first section 210 and the limiting ring 240 along the first axis and the length of the limiting boss 111.

[0089] It should be noted that if Figure 5 and Figure 6 As shown, since the first section 210 is located inside the shell 110 and the outer diameter of the first section 210 is larger than the outer diameter of the second section 220, the first movable part 200 is first extended into the shell 110 from the end of the shell 110 away from the limiting boss 111, and the second section 220 is extended out of the shell 110 until the inner side wall of the limiting boss 111 and the outer side wall of the second section 220 abut, and the end face of the first section 210 close to the second section 220 along the first axis direction abuts against the inner end face of the limiting boss 111, and then the limiting ring 240 is sleeved on the outside of the second section 220 located outside the shell 110 and abuts against the outer end face of the limiting boss 111, thereby realizing the disassembly and assembly of the swing arm structure 10 for easy maintenance.

[0090] In some embodiments, as Figure 5 As shown, a limiting groove is provided along the circumferential direction of the outer wall of the second section 220, and the limiting groove is spaced apart from the end of the second section 220 near the first section 210. The limiting ring 240 is partially disposed within the limiting groove and is adapted to abut and cooperate with the limiting boss 111. It should be noted that the thickness and size of the limiting groove can be adaptively designed based on the limiting ring 240, and this embodiment does not impose specific limitations on this.

[0091] It can be understood that a part of the limiting ring 240 is stuck in the limiting groove, and the other part extends outside the limiting groove, that is, the inner wall of the limiting groove can abut against the outer wall of the limiting ring 240, so that the limiting ring 240 can be precisely positioned on the second section 220, and at the same time, the limiting ring 240 can abut against the limiting boss 111, thereby achieving a limiting effect along the first axis between the first movable part 200 and the shell 110.

[0092] In some embodiments, a lubricating element is also provided between the inner wall of the housing 110 and the outer wall of the first movable member 200 to reduce direct contact between the housing 110 and the first movable member 200, thereby reducing friction and abnormal noise. The material of the lubricating element includes, but is not limited to, rubber.

[0093] In some embodiments, a lubricating element is also provided between the limiting ring 240 and the limiting groove to reduce direct contact between the limiting ring 240 and the limiting groove, thereby reducing friction and abnormal noise. The material of the lubricating element includes but is not limited to rubber.

[0094] In some embodiments, as Figures 1 to 6 As shown, the swing arm structure 10 further includes two bushings 500 . Bushings 500 are provided at the ends of the second movable member 300 and the housing 110, which are spaced apart from each other. These bushings 500 are connected to the steering knuckle and the subframe 20, respectively, to reduce wear and vibration between the components. Bushings 500 include, but are not limited to, hydraulic bushings 500 or rubber bushings 500 .

[0095] For example, when the toe control rod in the suspension system adopts the swing arm structure 10 of the present application, since its main function is to adjust and control the toe angle of the wheel, the steering knuckle and the subframe 20 can be connected respectively through two bushings 500.

[0096] In other embodiments, Figure 1 As shown, the swing arm structure 10 also includes a bushing 500 and a ball head 600. The bushing 500 is provided at the end of the housing 110 away from the second movable part 300, and the ball head 600 is provided at the end of the second movable part 300 away from the housing 110, which are used to reduce wear and vibration between components and provide a certain degree of freedom to adapt to the movement of the vehicle.

[0097] For example, when the upper control arm and the lower control arm in the suspension system adopt the swing arm structure 10 of the present application, since their main function is to support the wheels and transmit force, one side is connected to the subframe 20 through the bushing 500, and the other side is connected to the steering knuckle through the ball head 600. While ensuring accurate wheel positioning, it can also adapt to changes in the road surface and provide good driving smoothness.

[0098] An embodiment of the present application also provides a suspension system.

[0099] like Figure 7 As shown, the suspension system includes a subframe 20 , a steering knuckle and the aforementioned swing arm structure 10 .

[0100] It should be noted that the suspension system refers to the general term for all force-transmitting connection devices between the vehicle frame and the axle or wheel. Its function is to transmit the force and torque acting between the wheel and the frame, and to cushion the impact force transmitted to the frame or body by uneven road surface, and attenuate the vibration caused thereby, so as to ensure smooth driving of the car.

[0101] In this embodiment, the suspension system is a five-link suspension system, that is, it has a toe control rod, two upper control arms and two lower control arms, and at least one of the toe control rod, the upper control arms and the lower control arms adopts the above-mentioned swing arm structure 10.

[0102] The suspension system provided according to the embodiment of the present application improves the adaptability and flexibility to changing road conditions and different vehicle load conditions, and improves the stability and comfort of vehicle driving.

[0103] An embodiment of the present application further provides a vehicle comprising the above-mentioned suspension system.

[0104] The vehicle provided according to the embodiment of the present application has improved adaptability and flexibility to changing road conditions and different vehicle load conditions, and improved vehicle driving stability and comfort.

[0105] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0106] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0107] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0108] In the description of this application, “plurality” means two or more.

[0109] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0110] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0111] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0112] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A swing arm structure, applied to a suspension system, characterized in that: include: A power assembly, wherein a fixed end of the power assembly is used to connect to the subframe of the suspension system, and the power assembly has a first limiting portion; a first movable member coupled to the power assembly, and having a second limiting portion, the second limiting portion cooperating with the first limiting portion to limit the displacement of the first movable member relative to the power assembly along the first axis; A second movable member, one end of the second movable member is connected to the first movable member, and the other end is used to connect to the steering knuckle of the suspension system. When the output end of the power component drives the first movable member to rotate around the first axis, the second movable member moves along the first axis relative to the first movable member.

2. The swing arm structure according to claim 1, characterized in that: A limiting boss is formed on the inner side wall of the shell of the power assembly along the circumferential direction. The limiting boss is arranged near the end of the shell away from the sub-frame. The limiting boss is sleeved outside the first movable part and cooperates with the second limiting part. The first limiting part includes the limiting boss.

3. The swing arm structure according to claim 2, characterized in that: The first movable member comprises: The first section is located in the housing and is transmission-connected to the output end of the power assembly; a second section, movably connected to the second movable member; The third section is arranged between the first section and the second section, and the outer diameter of the third section is smaller than the outer diameter of the first section and the outer diameter of the second section respectively. The limiting boss is sleeved outside the third section, and the second limiting portion includes two end surfaces of the first section and the second section that are close to each other.

4. The swing arm structure according to claim 2, characterized in that: The first movable member comprises: The first section is located in the housing and is transmission-connected to the output end of the power assembly; The second section is provided at an end of the first section away from the power assembly, the outer diameter of the first section is larger than the outer diameter of the second section, and the limiting boss is sleeved outside the second section and is suitable for abutting and cooperating with the first section; The limiting ring is sleeved outside the second section and is suitable for abutting and cooperating with the limiting boss. The second limiting portion includes two end surfaces of the first section and the limiting ring that are close to each other.

5. The swing arm structure according to claim 4, characterized in that: A limiting groove is formed on the outer side wall of the second section along the circumferential direction, and the limiting groove is spaced apart from the end of the second section close to the first section. The limiting ring is partially arranged in the limiting groove and is suitable for abutting and cooperating with the limiting boss.

6. The swing arm structure according to any one of claims 1 to 5, characterized in that: The power assembly includes: case; a rotary driving member disposed in the housing, wherein an output end of the rotary driving member is transmission-connected to the first movable member; A limiting member is provided between the housing and the fixed end of the rotary driving member, and is used to limit the relative movement between the housing and the fixed end of the rotary driving member.

7. The swing arm structure according to any one of claims 1 to 5, characterized in that: Also includes: The protective cover is movably sleeved outside the second movable member and is connected to an end of the first movable member away from the power assembly.

8. The swing arm structure according to claim 7, characterized in that: The cross-sectional area of ​​the protective cover along the first axis and close to the power assembly is monotonically non-decreasing; and / or The first movable member is provided with an internal thread, the second movable member is partially located in the first movable member and is provided with an external thread matching the internal thread, and the inner diameter of the protective cover is smaller than the outer diameter of the external thread.

9. A suspension system, characterized in that: include: subframe; Steering knuckle; and at least one swing arm structure according to any one of claims 1 to 8, wherein the swing arm structure is connected to the subframe and the steering knuckle respectively.

10. A vehicle, characterized in that: Comprising the suspension system of claim 9.

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