Integrated force arm structure, dual rear axle suspension system and vehicle thereof

Abstract

The present application relates to a kind of integrated force arm structure, double rear axle suspension system and its vehicle, it includes: first force arm, the first force arm has first body, and from the first body towards one side extends to form two first arms spaced apart, each the first arm is rotatably connected with pin shaft, two the pin shaft on the first arm coaxially arranged and interval distribution;Second force arm, the second force arm has second body, and from the second body towards the side close to the first force arm extends to form two second arms spaced apart, two the second arm is arranged with two the first arm one by one, and each the second arm is rotatably connected to the pin shaft corresponding with the first arm;The first body extends to form first axle connecting arm towards away from the second body direction, the second body extends to form second axle connecting arm towards away from the first body direction.Two force arms integrated connection, simple structure, realize lightweight design.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension, and particularly to an integrated lever arm structure, a dual rear axle suspension system, and a vehicle thereof. Background Technology

[0002] Against the backdrop of energy conservation and environmental protection, lightweight technology for automotive chassis is a development trend in automotive chassis technology. As important components of heavy-duty truck chassis systems, thrust rods and stabilizer bars are naturally designed to be lightweight.

[0003] Currently, the main rear suspension systems of mainstream heavy-duty trucks are air suspension systems and balance suspension systems. Their thrust rods generally adopt a V-shaped thrust rod or an I-shaped straight thrust rod arranged in a V-shape to transmit longitudinal forces such as driving force and braking force, as well as lateral forces, between the chassis and the axle. To improve the vehicle's ability to suppress roll, a stabilizer bar device is required.

[0004] In related technologies, the two arms of the dual rear axle suspension system are each connected to the vehicle frame separately via connecting axle seats. On the one hand, this increases the weight of the vehicle chassis itself, making it impossible to achieve lightweight design. On the other hand, it occupies too much space in the vehicle frame, which restricts the placement of other components. Summary of the Invention

[0005] This invention provides an integrated lever arm structure, a dual rear axle suspension system, and a vehicle thereof, to solve the problem that in related technologies, the two lever arms of a dual rear axle suspension system are connected to the vehicle frame separately through connecting axle seats. On the one hand, this increases the weight of the vehicle chassis itself, making it impossible to achieve lightweight design. On the other hand, it occupies too much space in the vehicle frame, resulting in limited placement of other components.

[0006] Firstly, an integrated lever arm structure is provided, comprising:

[0007] The first lever arm has a first body and extends from the first body toward one side to form two spaced-apart first arms. Each first arm is rotatably connected to a pin, and the pins on the two first arms are coaxially arranged and spaced apart.

[0008] The second lever arm has a second body and extends from the second body toward the side close to the first lever arm to form two spaced-apart second arms. The two second arms correspond one-to-one with the two first arms, and each second arm is rotatably connected to the pin corresponding to the first arm.

[0009] The first body extends away from the second body to form a first axle connecting arm, and the second body extends away from the first body to form a second axle connecting arm.

[0010] In some embodiments, an angle is formed between the two first arms, making the first lever arm V-shaped; an angle is formed between the two second arms, making the second lever arm V-shaped.

[0011] In some embodiments, the number of the first axle connecting arms is two, and the spacing direction of the two first axle connecting arms is consistent with the spacing direction of the two first arms.

[0012] The number of the second axle connecting arms is two, and the spacing direction of the two second axle connecting arms is the same as the spacing direction of the two second arms.

[0013] In some embodiments, both the first lever arm and the second lever arm are arranged in an X-shape.

[0014] In some embodiments, the first arm is fixed with a first rotating sleeve, and the second arm is fixed with a second rotating sleeve;

[0015] The first rotating sleeve is located inside the second rotating sleeve, and the side wall of the second rotating sleeve is provided with a receiving groove, and one end of the first arm is located in the receiving groove;

[0016] The pin coaxially passes through the first rotating sleeve and the second rotating sleeve, and is rotatably connected to the first rotating sleeve and the second rotating sleeve.

[0017] In some embodiments, both ends of the second rotating sleeve are connected to end blocks, and the first rotating sleeve is located between the two end blocks;

[0018] The pin passes coaxially through the first end block, the first rotating sleeve, and the second end block in sequence, and is rotatably connected to the first rotating sleeve and the two end blocks.

[0019] In some embodiments, a limiting opening is provided on at least one end sidewall of the second rotating sleeve;

[0020] A limiting block is fixed to the side wall of the end block, and the limiting block is adapted to the limiting port;

[0021] The end block is positioned within the limiting opening by the limiting block, thereby fixing the end block to one end opening of the second rotating sleeve.

[0022] In some embodiments, the limiting block and the end block are integrally formed.

[0023] Secondly, a dual rear axle suspension system is provided, comprising:

[0024] The first lever arm has a first body and extends from the first body toward one side to form two spaced-apart first arms. Each first arm is rotatably connected to a pin, and the pins on the two first arms are coaxially arranged and spaced apart.

[0025] The second lever arm has a second body and extends from the second body toward the side close to the first lever arm to form two spaced-apart second arms. The two second arms correspond one-to-one with the two first arms, and each second arm is rotatably connected to the pin corresponding to the first arm.

[0026] The first body extends away from the second body to form a first axle connecting arm, and the second body extends away from the first body to form a second axle connecting arm;

[0027] A frame, wherein two axles are fixed on opposite inner sides of the frame, and the two axles are spaced apart along the length of the frame;

[0028] The two pins correspond one-to-one with the opposite sides of the vehicle frame and are fixed to the corresponding side;

[0029] The first axle connecting arm is connected to the first axle, and the second axle connecting arm is connected to the second axle.

[0030] Thirdly, a vehicle is provided that includes the dual rear axle suspension system as described above.

[0031] The beneficial effects of the technical solution provided by this invention include: the assembly of the integrated lever arm structure can be completed by connecting both the first and second arms to the same pin; in subsequent processes, the pin is connected to the frame of the dual rear axle suspension system, and the first and second axle connecting arms are each connected to one axle, thus realizing the installation of the integrated lever arm structure. On the one hand, the integrated lever arm structure achieves integrated connection of two lever arms through a pin, which is simple in structure and realizes lightweight design; on the other hand, the pin occupies little space within the frame, ensuring the arrangement requirements of other components and requiring minimal modification to the frame, thereby improving the versatility of the frame. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a three-dimensional structural diagram of the integrated lever arm structure provided in an embodiment of the present invention;

[0034] Figure 2 A three-dimensional structural diagram of the connection between the first rotating sleeve and the second rotating sleeve provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic cross-sectional view of the connection between the first rotating sleeve and the second rotating sleeve provided in an embodiment of the present invention.

[0036] Figure 4 This is a three-dimensional structural diagram of the second rotating sleeve provided in an embodiment of the present invention;

[0037] Figure 5 A three-dimensional structural diagram of the end block provided in an embodiment of the present invention;

[0038] Figure 6 This is a three-dimensional structural diagram of a dual rear axle suspension system provided in an embodiment of the present invention.

[0039] In the diagram: 1. Pin; 2. First lever arm; 21. First main body; 22. First arm; 23. First axle connecting arm; 24. First rotating sleeve; 3. Second lever arm; 31. Second main body; 32. Second arm; 33. Second axle connecting arm; 34. Second rotating sleeve; 341. Receiving groove; 342. End block; 3421. Limiting block; 343. Limiting port; 4. Frame; 41. Longitudinal beam; 5. Axle. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention provides an integrated lever arm structure, a dual rear axle suspension system, and a vehicle thereof, to solve the problem that in related technologies, the two lever arms of a dual rear axle suspension system are connected to the vehicle frame separately through connecting axle seats. On the one hand, this increases the weight of the vehicle chassis itself, making it impossible to achieve lightweight design. On the other hand, it occupies too much space in the vehicle frame, resulting in limited placement of other components.

[0042] like Figure 1 and Figure 6As shown, this embodiment of the invention provides an integrated lever arm structure, which may include: a first lever arm 2, the first lever arm 2 having a first body 21, and extending from the first body 21 toward one side to form two spaced-apart first arms 22, each first arm 22 being rotatably connected to a pin 1, the pins 1 on the two first arms 22 being coaxially arranged and spaced apart; a second lever arm 3, the second lever arm 3 having a second body 31, and extending from the second body 31 toward one side close to the first lever arm 2 to form two spaced-apart second arms 32, the two second arms 32 being arranged one-to-one with the two first arms 22, and each second arm 32 being rotatably connected to the pin 1 corresponding to the first arm 22; the first body 21 extending toward a direction away from the second body 31 to form a first axle connecting arm 23, and the second body 31 extending toward a direction away from the first body 21 to form a second axle connecting arm 33.

[0043] The first main body 21 has two first arms 22 forked at its right end, which are spaced apart in the vertical direction. The first axle connecting arm 23 extends from the left end of the first main body 21. The second main body 31 has two second arms 32 forked at its left end, which are also spaced apart in the vertical direction. The second axle connecting arm 33 extends from the right end of the second main body 31. The upper first arm 22 and the second arm 32 are rotatably connected to the first pin 1, and the lower first arm 22 and the second arm 32 are rotatably connected to the second pin 1. The first axle connecting arm 23 and the second axle connecting arm 33 can be connected to the axle 5 of the dual rear axle suspension system to complete the installation of the integrated lever arm structure and the dual rear axle suspension system.

[0044] Specifically, the integrated lever arm structure is assembled by connecting both the first arm 22 and the second arm 32 to the same pin 1. In subsequent steps, the pin 1 is connected to the frame 4 of the dual rear axle suspension system, and the first axle connecting arm 23 and the second axle connecting arm 33 are each connected to an axle 5, thus completing the installation of the integrated lever arm structure. On one hand, the integrated lever arm structure achieves the integrated connection of the first arm 2 and the second arm 3 through the pin 1, resulting in a simple structure and lightweight design. On the other hand, the pin 1 occupies a small volume within the frame 4, ensuring the arrangement requirements of other components and minimizing modifications to the frame 4, thereby improving its versatility.

[0045] In some embodiments, an angle is formed between the two first arms 22, so that the first lever arm 2 is arranged in a V shape; an angle is formed between the two second arms 32, so that the second lever arm 3 is arranged in a V shape.

[0046] The first lever arm 2 can be V-shaped, meaning the line connecting the first axle connecting arm 23 at the left end and the two first arms 22 at the right end of the first lever arm 2 forms a V-shape. The first main body 21 supports the main structure of the first lever arm 2. Similarly, the second lever arm 3 can also be V-shaped, meaning the line connecting the second axle connecting arm 33 at the right end and the two second arms 32 at the left end of the second lever arm 3 forms a V-shape. The second main body 31 supports the main structure of the second lever arm 3. By making both the first lever arm 2 and the second lever arm 3 V-shaped, the integrated lever arm structure is simple in structure, reliable in connection, and achieves lightweight design. Furthermore, the V-shaped rod occupies less space within the frame 4, ensuring the arrangement requirements of other components are met, and the pin shaft 1 reduces the impact on the frame 4, thus improving the versatility of the frame 4.

[0047] Of course, in some embodiments, the first lever arm 2 and the second lever arm 3 may also be arranged in a Y shape.

[0048] In some embodiments, such as Figure 1 and Figure 6 As shown, there are two first axle connecting arms 23, and the spacing direction of the two first axle connecting arms 23 is the same as the spacing direction of the two first arms 22; there are two second axle connecting arms 33, and the spacing direction of the two second axle connecting arms 33 is the same as the spacing direction of the two second arms 32.

[0049] Among them, there are two first axle connecting arms 23, and the two first axle connecting arms 23 can be set vertically. There are also two second axle connecting arms 33, and the two second axle connecting arms 33 are also set vertically. This improves the connection strength and reliability between the first lever arm 2 and the first axle 5, as well as the connection strength and reliability between the second lever arm 3 and the second axle 5.

[0050] In some embodiments, such as Figure 1 and Figure 6 As shown, both the first lever arm 2 and the second lever arm 3 are arranged in an X shape.

[0051] The first lever arm 2 and the second lever arm 3 are both arranged in an X-shape. The two connection points between the X-arm and the axle 5 are distributed on both sides of the axle housing, avoiding the maximum outer diameter of the axle housing. This design helps to lower the suspension height and provide better handling. The X-arm structure eliminates the need for an additional stabilizer bar, improving the vehicle's anti-roll performance while reducing overall vehicle weight. Fewer parts are required, simplifying assembly and contributing to weight reduction.

[0052] Of course, in some embodiments, the first lever arm 2 and the second lever arm 3 may also be arranged in an H-shape.

[0053] In some embodiments, such as Figure 2 and Figure 3 As shown, the first arm 22 is fixed with a first rotating sleeve 24, and the second arm 32 is fixed with a second rotating sleeve 34; the first rotating sleeve 24 is located inside the second rotating sleeve 34, and the side wall of the second rotating sleeve 34 is provided with a receiving groove 341, and one end of the first arm 22 is located inside the receiving groove 341; the pin 1 coaxially passes through the first rotating sleeve 24 and the second rotating sleeve 34, and is rotatably connected to the first rotating sleeve 24 and the second rotating sleeve 34.

[0054] The right end of the first arm 22 is fixed with a first rotating sleeve 24, which can be hollowly arranged through the front and back directions. The left end of the second arm 32 is fixed with a second rotating sleeve 34, which can be hollowly arranged through the front and back directions. The side wall of the second rotating sleeve 34 is provided with a receiving groove 341, and the length direction of the receiving groove 341 extends along the circumference of the second rotating sleeve 34. The first rotating sleeve 24 can be located inside the second rotating sleeve 34, and the first arm 22 is located inside the receiving groove 341. Its pin 1 coaxially passes through the first rotating sleeve 24 and the second rotating sleeve 34 and is rotatably connected to the first rotating sleeve 24 and the second rotating sleeve 34. When the first rotating sleeve 24 rotates, the first arm 22 can move along the length direction of the receiving groove 341. Similarly, when the second rotating sleeve 34 rotates, the second rotating sleeve 34 and the pin 1 rotate. With the setting of the receiving groove 341, interference is prevented when the first rotating sleeve 24 and the second rotating sleeve 34 rotate at the same time.

[0055] Of course, in some embodiments, the first rotating sleeve 24 and the second rotating sleeve 34 can be distributed at intervals along the length direction of the pin 1. Specifically, the width between the two first arms 22 is less than the width between the two second arms 32, and the two first arms 22 are located between the two second arms 32; or the width between the two first arms 22 is greater than the width between the two second arms 32, and the two second arms 32 are located between the two first arms 22.

[0056] Alternatively, one of the first arms 22 is located between the two second arms 32 (which is also one of the second arms 32 located between the two first arms 22), so that the four arms between the first arm 2 and the second arm 3 are staggered, which can further improve the load-bearing capacity and suspension performance of the double arms and ensure the superior performance of the dual rear axle suspension system.

[0057] In some embodiments, such as Figure 2 and Figure 3As shown, both ends of the second rotating sleeve 34 are connected to end blocks 342, and the first rotating sleeve 24 is located between the two end blocks 342; the pin 1 passes through the first end block 342, the first rotating sleeve 24 and the second end block 342 in sequence, and is rotatably connected to the first rotating sleeve 24 and the two end blocks 342.

[0058] End blocks 342 can be installed at both the front and rear openings of the second rotating sleeve 34. The second rotating sleeve 34 can be rotatably connected to the pin 1 through the end blocks 342, while also limiting the axial offset of the first rotating sleeve 24 inside, ensuring the normal rotation of the first lever arm 2. Similarly, the first rotating sleeve 24 also restricts the axial movement of the second rotating sleeve 34, thus playing a mutual limiting role.

[0059] In some embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, at least one end sidewall of the second rotating sleeve 34 has a limiting opening 343; the sidewall of the end block 342 is fixed with a limiting block 3421, and the limiting block 3421 is adapted to the limiting opening 343; the end block 342 is limited and fitted within the limiting opening 343 by the limiting block 3421, so that the end block 342 is fixed to one end opening of the second rotating sleeve 34.

[0060] The second rotating sleeve 34 can have a limiting opening 343 on its rear side wall, and the end block 342 can be fixed to the side wall of the limiting opening 343, enabling the quick assembly of the end block 342 and facilitating the installation of the first rotating sleeve 24 inside the second rotating sleeve 34. The end block 342 at the front end of the second rotating sleeve 34 can be integrally formed with the second rotating sleeve 34, or it can adopt a design with a limiting opening 343 at the rear end of the second rotating sleeve 34.

[0061] Of course, in some embodiments, there can be multiple limiting ports 343. Multiple limiting ports 343 can be distributed in a circumferential direction along the rear end sidewall of the second rotating sleeve 34 of the end block 342 to improve the installation stability and reliability of the end block 342.

[0062] In some embodiments, the limiting block 3421 and the end block 342 are integrally formed.

[0063] In some embodiments, such as Figure 1 and Figure 6As shown, embodiments of the present invention can also provide a dual rear axle suspension system, which may include: a first lever arm 2, the first lever arm 2 having a first body 21, and extending from the first body 21 toward one side to form two spaced-apart first arms 22, each first arm 22 being rotatably connected to a pin 1, the pins 1 on the two first arms 22 being coaxially arranged and spaced apart; a second lever arm 3, the second lever arm 3 having a second body 31, and extending from the second body 31 toward the side close to the first lever arm 2 to form two spaced-apart second arms 32, the two second arms 32 being arranged one-to-one with the two first arms 22, and each of the first arms 22 being rotatably connected to a pin 1, the pins 1 on the two first arms 22 being coaxially arranged and spaced apart; and a second lever arm 3, the second lever arm 3 having a second body 31, and extending from the second body 31 toward the side close to the first lever arm 2 to form two spaced-apart second arms 32, the two second arms 32 being arranged one-to-one with the two first arms 22, and each of the first arms 22 being rotatably connected to a pin 1, the pins 1 on the two first arms 22 being coaxially arranged and spaced apart. The two arms 32 are rotatably connected to the pins 1 corresponding to the first arm 22; the first body 21 extends away from the second body 31 to form a first axle connecting arm 23, and the second body 31 extends away from the first body 21 to form a second axle connecting arm 33; the frame 4 has two axles 5 fixed on its relatively inner side, and the two axles 5 are spaced apart along the length of the frame 4; the two pins 1 correspond one-to-one with the relatively two sides of the frame 4 and are fixed to the corresponding side; the first axle connecting arm 23 is connected to the first axle 5, and the second axle connecting arm 33 is connected to the second axle 5.

[0064] Specifically, the frame 4 includes two longitudinal beams 41, which are spaced apart and parallel to each other in the front-rear direction. The length direction of the longitudinal beams 41 is opposite to the length of the vehicle body, and the spacing between the two longitudinal beams 41 is in the width direction of the vehicle body. The first pin 1 can be fixedly connected to the first longitudinal beam 41, and the second pin 1 can be fixed to the second longitudinal beam 41. The first axle connecting arm 23 is connected to the first axle 5, and the second axle connecting arm 33 is connected to the second axle 5, thus completing the installation of the integrated lever arm structure.

[0065] More specifically, the first lever arm 2 and the second lever arm 3 are connected to the axle 5 using double-headed bolts with hexagonal heads, with the middle section being thickened. This ensures the positioning of the axle and facilitates assembly.

[0066] The first main body 21 has two first arms 22 forked at its right end, which are spaced apart in the vertical direction. The first axle connecting arm 23 extends from the left end of the first main body 21. The second main body 31 has two second arms 32 forked at its left end, which are also spaced apart in the vertical direction. The second axle connecting arm 33 extends from the right end of the second main body 31. The upper first arm 22 and the second arm 32 are rotatably connected to the first pin 1, and the lower first arm 22 and the second arm 32 are rotatably connected to the second pin 1. The first axle connecting arm 23 and the second axle connecting arm 33 can be connected to the axle 5 of the dual rear axle suspension system to complete the installation of the integrated lever arm structure and the dual rear axle suspension system.

[0067] Specifically, the integrated lever arm structure is assembled by connecting both the first arm 22 and the second arm 32 to the same pin 1. In subsequent steps, the pin 1 is connected to the frame 4 of the dual rear axle suspension system, and the first axle connecting arm 23 and the second axle connecting arm 33 are each connected to an axle 5, thus completing the installation of the integrated lever arm structure. On one hand, the integrated lever arm structure achieves the integrated connection of the first arm 2 and the second arm 3 through the pin 1, resulting in a simple structure and lightweight design. On the other hand, the pin 1 occupies a small volume within the frame 4, ensuring the arrangement requirements of other components and minimizing modifications to the frame 4, thereby improving its versatility.

[0068] In some embodiments, an angle is formed between the two first arms 22, so that the first lever arm 2 is arranged in a V shape; an angle is formed between the two second arms 32, so that the second lever arm 3 is arranged in a V shape.

[0069] The first lever arm 2 can be V-shaped, meaning the line connecting the first axle connecting arm 23 at the left end and the two first arms 22 at the right end of the first lever arm 2 forms a V-shape. The first main body 21 supports the main structure of the first lever arm 2. Similarly, the second lever arm 3 can also be V-shaped, meaning the line connecting the second axle connecting arm 33 at the right end and the two second arms 32 at the left end of the second lever arm 3 forms a V-shape. The second main body 31 supports the main structure of the second lever arm 3. By making both the first lever arm 2 and the second lever arm 3 V-shaped, the integrated lever arm structure is simple in structure, reliable in connection, and achieves lightweight design. Furthermore, the V-shaped rod occupies less space within the frame 4, ensuring the arrangement requirements of other components are met, and the pin shaft 1 reduces the impact on the frame 4, thus improving the versatility of the frame 4.

[0070] Of course, in some embodiments, the first lever arm 2 and the second lever arm 3 may also be arranged in a Y shape.

[0071] In some embodiments, such as Figure 1 and Figure 6 As shown, there are two first axle connecting arms 23, and the spacing direction of the two first axle connecting arms 23 is the same as the spacing direction of the two first arms 22; there are two second axle connecting arms 33, and the spacing direction of the two second axle connecting arms 33 is the same as the spacing direction of the two second arms 32.

[0072] Among them, there are two first axle connecting arms 23, and the two first axle connecting arms 23 can be set vertically. There are also two second axle connecting arms 33, and the two second axle connecting arms 33 are also set vertically. This improves the connection strength and reliability between the first lever arm 2 and the first axle 5, as well as the connection strength and reliability between the second lever arm 3 and the second axle 5.

[0073] In some embodiments, such as Figure 1 and Figure 6 As shown, both the first lever arm 2 and the second lever arm 3 are arranged in an X shape.

[0074] The first lever arm 2 and the second lever arm 3 are both arranged in an X-shape. The two connection points between the X-arm and the axle 5 are distributed on both sides of the axle housing, avoiding the maximum outer diameter of the axle housing. This design helps to lower the suspension height and provide better handling. The X-arm structure eliminates the need for an additional stabilizer bar, improving the vehicle's anti-roll performance while reducing overall vehicle weight. Fewer parts are required, simplifying assembly and contributing to weight reduction.

[0075] In some embodiments, the present invention may also provide a vehicle including the dual rear axle suspension system as described above.

[0076] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0077] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An integrated lever arm structure, characterized in that, It includes: First lever arm (2), the first lever arm (2) has a first body (21), and extends from the first body (21) toward one side to form two first arms (22) spaced apart, each first arm (22) is rotatably connected with a pin (1), the pins (1) on the two first arms (22) are coaxially arranged and spaced apart; The second lever arm (3) has a second body (31) and extends from the second body (31) toward the side close to the first lever arm (2) to form two spaced second arms (32). The two second arms (32) are arranged in a one-to-one correspondence with the two first arms (22), and each second arm (32) is rotatably connected to the pin (1) corresponding to the first arm (22). The first body (21) extends in a direction away from the second body (31) to form a first axle connecting arm (23), and the second body (31) extends in a direction away from the first body (21) to form a second axle connecting arm (33). The first arm (22) is fixed with a first rotating sleeve (24), and the second arm (32) is fixed with a second rotating sleeve (34). The first rotating sleeve (24) is located inside the second rotating sleeve (34), and the side wall of the second rotating sleeve (34) is provided with a receiving groove (341), and one end of the first arm (22) is located inside the receiving groove (341); The pin (1) coaxially passes through the first rotating sleeve (24) and the second rotating sleeve (34), and is rotatably connected to the first rotating sleeve (24) and the second rotating sleeve (34); The second rotating sleeve (34) has end blocks (342) connected to both ends of its openings, and the first rotating sleeve (24) is located between the two end blocks (342); The pin (1) passes through the first end block (342), the first rotating sleeve (24) and the second end block (342) in sequence, and is rotatably connected to the first rotating sleeve (24) and the two end blocks (342); A limiting opening (343) is provided on at least one end sidewall of the second rotating sleeve (34). A limiting block (3421) is fixed to the side wall of the end block (342), and the limiting block (3421) is adapted to the limiting port (343); The end block (342) is limited and fitted within the limiting port (343) by the limiting block (3421), so that the end block (342) is fixed to one end opening of the second rotating sleeve (34).

2. The integrated lever arm structure as described in claim 1, characterized in that: An angle is formed between the two first arms (22), so that the first lever arm (2) is set in a V shape; an angle is formed between the two second arms (32), so that the second lever arm (3) is set in a V shape.

3. The integrated lever arm structure as described in claim 1, characterized in that: The number of the first axle connecting arms (23) is two, and the spacing direction of the two first axle connecting arms (23) is consistent with the spacing direction of the two first arms (22); The number of the second axle connecting arms (33) is two, and the spacing direction of the two second axle connecting arms (33) is consistent with the spacing direction of the two second arms (32).

4. The integrated lever arm structure as described in claim 3, characterized in that: Both the first lever arm (2) and the second lever arm (3) are arranged in an X shape.

5. The integrated lever arm structure as described in claim 1, characterized in that: The limiting block (3421) and the end block (342) are integrally formed.

6. A dual rear axle suspension system, characterized in that, It includes: First lever arm (2), the first lever arm (2) has a first body (21), and extends from the first body (21) toward one side to form two first arms (22) spaced apart, each first arm (22) is rotatably connected with a pin (1), the pins (1) on the two first arms (22) are coaxially arranged and spaced apart; The second lever arm (3) has a second body (31) and extends from the second body (31) toward the side close to the first lever arm (2) to form two spaced second arms (32). The two second arms (32) are arranged in a one-to-one correspondence with the two first arms (22), and each second arm (32) is rotatably connected to the pin (1) corresponding to the first arm (22). The first body (21) extends in a direction away from the second body (31) to form a first axle connecting arm (23), and the second body (31) extends in a direction away from the first body (21) to form a second axle connecting arm (33). The frame (4) has two axles (5) fixed on its inner side, and the two axles (5) are spaced apart along the length of the frame (4). The two pins (1) correspond one-to-one with the opposite sides of the frame (4) and are fixed to the corresponding side; The first axle connecting arm (23) is connected to the first axle (5), and the second axle connecting arm (33) is connected to the second axle (5); The first arm (22) is fixed with a first rotating sleeve (24), and the second arm (32) is fixed with a second rotating sleeve (34). The first rotating sleeve (24) is located inside the second rotating sleeve (34), and the side wall of the second rotating sleeve (34) is provided with a receiving groove (341), and one end of the first arm (22) is located inside the receiving groove (341); The pin (1) coaxially passes through the first rotating sleeve (24) and the second rotating sleeve (34), and is rotatably connected to the first rotating sleeve (24) and the second rotating sleeve (34); The second rotating sleeve (34) has end blocks (342) connected to both ends of its openings, and the first rotating sleeve (24) is located between the two end blocks (342); The pin (1) passes through the first end block (342), the first rotating sleeve (24) and the second end block (342) in sequence, and is rotatably connected to the first rotating sleeve (24) and the two end blocks (342); A limiting opening (343) is provided on at least one end sidewall of the second rotating sleeve (34). A limiting block (3421) is fixed to the side wall of the end block (342), and the limiting block (3421) is adapted to the limiting port (343); The end block (342) is limited and fitted within the limiting port (343) by the limiting block (3421), so that the end block (342) is fixed to one end opening of the second rotating sleeve (34).

7. A vehicle, characterized in that, It includes the dual rear axle suspension system as described in claim 6.

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