Mounting arm, suspension system, vehicle chassis and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a mounting arm, a suspension system, a vehicle chassis and a vehicle, the mounting arm comprises an arm main body and a limiting piece connected to the arm main body and used for being connected with an auxiliary frame, the arm main body is of an integrally-formed structure, platform and general production can be achieved easily, and meanwhile the mounting arm is convenient to mount and dismount. The second connecting hole with large stress is formed in the limiting piece, the hardness of the limiting piece is larger than that of the arm body, the stress strength of the mounting arm is improved, and the problem that the mounting arm deforms and even fails can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a mounting arm, a suspension system, a vehicle chassis and a vehicle. Background Art

[0002] The mounting arm is used to mount elastic elements such as air springs of the suspension. The two ends of the mounting arm are respectively connected to the subframe and the steering knuckle. The existing mounting arms are usually made by stamping and welding steel plates. Such mounting arms not only have a large weight, but also require different molds when the vehicle models or hard points are different, and it is impossible to achieve platform-based and universal production. To solve this problem, some manufacturers use the method of extruding aluminum profiles to make the mounting arm. However, this mounting arm is integrally formed entirely by aluminum profiles, has a low load-bearing capacity, is prone to deformation and even failure problems, and it is difficult to meet the user's needs. Content of the Utility Model

[0003] The purpose of the utility model is to provide a mounting arm, a suspension system, a vehicle chassis and a vehicle, aiming to reduce the processing difficulty of the mounting arm while improving the stress intensity of the mounting arm.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] The mounting arm includes:

[0006] An arm main body, the arm main body includes an integrally formed mounting portion, a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are respectively connected to both ends of the mounting portion along a first direction. One side of the mounting portion along a second direction is provided with a mounting structure for mounting an elastic member. The first connecting portion is provided with a first connecting hole for connecting to the steering knuckle; the first direction is perpendicular to the second direction.

[0007] A limiting member, the hardness of the limiting member is greater than that of the arm main body. The limiting member is fixedly connected to the second connecting portion, and the limiting member is provided with a second connecting hole for connecting to the subframe.

[0008] As a preferred technical solution of the above mounting arm, the second connecting hole is a first kidney-shaped hole, and the limiting member is further provided with a limiting structure, and the limiting structure is located on the outer periphery of the first kidney-shaped hole.

[0009] As a preferred technical solution of the above mounting arm, the limiting member is provided on one side of the second connecting portion along a third direction, and the second connecting portion is provided with a second kidney-shaped hole corresponding to the first kidney-shaped hole; the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0010] As a preferred technical solution of the above mounting arm, the limiting structure is a boss, and the boss is arranged on a side of the limiting member along away from the second connecting portion.

[0011] As a preferred technical solution of the above mounting arm, the first connecting portion includes two first connecting lugs, and the two first connecting lugs are arranged at intervals along a third direction; and / or,

[0012] The second connecting portion includes two second connecting lugs, and the two second connecting lugs are arranged at intervals along the third direction;

[0013] The first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0014] As a preferred technical solution of the above mounting arm, the two first connecting lugs are both provided with the first connecting holes; and / or,

[0015] The two second connecting lugs are both provided with the limiting members.

[0016] As a preferred technical solution of the above mounting arm, the mounting portion is provided with a through hole penetrating along the first direction.

[0017] As a preferred technical solution of the above mounting arm, the second connecting portion includes a fixed end and a connecting end, the limiting member is located at the connecting end, the fixed end is connected to the mounting portion, and from the fixed end to the connecting end, the second connecting portion extends obliquely toward the side where the mounting structure is located relative to the mounting portion.

[0018] As a preferred technical solution of the above mounting arm, the limiting member is fixedly connected to the second connecting portion through a connecting structure, the connecting structure includes a first riveting structure and a second riveting structure, the first riveting structure is arranged on the second connecting portion, the second riveting structure is arranged on the limiting member, and the first riveting structure and the second riveting structure are riveted and fixed.

[0019] As a preferred technical solution of the above mounting arm, a first avoiding structure for avoiding the elastic member is provided at the connection between the mounting portion and the first connecting portion; and / or

[0020] A second avoiding structure for avoiding the elastic member is provided at the connection between the mounting portion and the second connecting portion; and / or,

[0021] The mounting portion is provided with a positioning structure for connecting with the positioning portion of the elastic member; and / or,

[0022] The first connecting portion is provided with a first groove, and the first connecting hole is arranged in the first groove; and / or,

[0023] The second connecting portion is provided with a second groove, and the limiting member is arranged in the second groove.

[0024] As a preferred technical solution of the above mounting arm, main body flanges are provided on both sides of the arm main body along the third direction, and the main body flanges and the mounting structure are on the same side of the arm main body along the second direction; or,

[0025] Mounting flanges are provided on both sides of the mounting portion along the third direction, and the mounting flanges and the mounting structure are on the same side of the mounting portion along the second direction;

[0026] The first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0027] To achieve the above object, the present invention also provides a suspension system, including an elastic member and the mounting arm as described in any one of the above, and the elastic member is mounted on the mounting structure.

[0028] To achieve the above object, the present invention also provides a vehicle chassis, including a subframe, a steering knuckle and the suspension system as described above. The steering knuckle is connected to the first connection hole through a first connection component, and the subframe is connected to the second connection hole through a second connection component.

[0029] To achieve the above object, the present invention also provides a vehicle, including the vehicle chassis as described above.

[0030] The present invention has at least the following beneficial effects:

[0031] The mounting arm provided by the present invention includes an arm main body and a limiting member connected thereto for connecting with a subframe. The arm main body is an integrally formed structure, which is beneficial to realize platform-based and generalized production. At the same time, the second connection hole with greater force is arranged on the limiting member, and the hardness of the limiting member is greater than that of the arm main body, improving the force-bearing strength of the mounting arm and avoiding problems such as deformation or even failure of the mounting arm.

[0032] The suspension system provided by the present invention, the vehicle chassis including the suspension system and the vehicle including the vehicle chassis all include a mounting arm. The mounting arm includes an arm main body and a limiting member connected thereto for connecting with a subframe. The arm main body is an integrally formed structure, which is not only beneficial to realize platform-based and generalized production with lower cost, but also improves the force-bearing strength of the mounting arm. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0034] Figure 1 Structural schematic diagram of the mounting arm provided by the embodiment of the present utility model Figure 1 ;

[0035] Figure 2 Structural schematic diagram of the mounting arm provided by the embodiment of the present utility model Figure 2 ;

[0036] Figure 3 Structural schematic diagram of the mounting arm provided by the embodiment of the present utility model Figure 3 ;

[0037] Figure 4 Structural schematic diagram of the arm main body provided by the embodiment of the present utility model;

[0038] Figure 5 Structural schematic diagram of the limiting member provided by the embodiment of the present utility model Figure 1 ;

[0039] Figure 6 Structural schematic diagram of the limiting member provided by the embodiment of the present utility model Figure 2 ;

[0040] Figure 7 Comparison schematic diagram of the long mounting arm and the short mounting arm provided by the embodiment of the present utility model.

[0041] In the figure:

[0042] 10. Long mounting arm; 20. Short mounting arm; 1. Arm main body; 11. Mounting part; 111. Mounting structure; 112. Positioning structure; 12. First connection part; 121. First connection hole; 122. First U-shaped groove; 123. First connection ear; 124. First groove; 125. First chamfer; 13. Second connection part; 131. Fixed end; 132. Connection end; 133. Second waist-shaped hole; 134. Second U-shaped groove; 135. Second connection ear; 136. Second groove; 137. Second chamfer; 14. Connection arc surface; 15. Through hole; 161. First avoidance structure; 162. Second avoidance structure; 17. Main body flanging; 2. Limiting member; 21. Second connection hole; 22. Limiting structure; 23. Third chamfer; 31. First riveting structure; 32. Second riveting structure. Specific embodiments

[0043] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0045] In the description of this embodiment, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] As Figures 1 to 7 shown, the embodiment of the present utility model provides a mounting arm, a suspension system, a vehicle chassis and a vehicle. The suspension system includes an elastic member and a mounting arm, and the elastic member is mounted on the mounting arm. The vehicle includes a vehicle chassis, and the vehicle chassis includes a subframe, a steering knuckle and a suspension system. One end of the mounting arm is connected to the subframe, and the other end is connected to the steering knuckle.

[0047] In the prior art, the mounting arm is usually made of metal steel. Specifically, first, each module of the mounting arm is made by stamping a steel plate, and then the modules are welded and fixed to make the mounting arm. The average weight of this mounting arm is usually above 2.5 kg. Although it can meet the requirements of the vehicle for the stiffness, strength, fatigue and other performance of the mounting arm, the parts occupy a large space and are heavy. Moreover, when the vehicle models or hard points are different, different stamping dies are required, and platform-based and universal production cannot be realized, resulting in high production costs. To solve this problem, some manufacturers use the method of extrusion molding of aluminum profiles to make the mounting arm. However, this mounting arm is integrally formed entirely of aluminum profiles, with low load-bearing capacity, and is prone to deformation or even failure problems, making it difficult to meet user requirements.

[0048] To this end, the mounting arm of this embodiment includes an arm main body 1 and a limiting member 2. The arm main body 1 includes an integrally formed mounting portion 11, a first connecting portion 12, and a second connecting portion 13. The first connecting portion 12 and the second connecting portion 13 are respectively connected to both ends of the mounting portion 11 along the first direction; on one side of the mounting portion 11 along the second direction, there is a mounting structure 111 for mounting an elastic member; the first connecting portion 12 is provided with a first connecting hole 121 for connecting to a steering knuckle, and the steering knuckle is connected to the first connecting hole 121 through a first connecting component; the hardness of the limiting member 2 is greater than that of the arm main body 1, the limiting member 2 is fixedly connected to the second connecting portion 13, the limiting member 2 is provided with a second connecting hole 21 for connecting to a subframe, and the subframe is connected to the second connecting hole 21 through a second connecting component; the first direction is perpendicular to the second direction.

[0049] The arm main body 1 is an integrally formed structure, which is beneficial to realizing platformized and generalized production. At the same time, the second connecting hole 21 with a large force is arranged on the limiting member 2, and the hardness of the limiting member 2 is greater than that of the arm main body 1, which improves the load-bearing capacity of the mounting arm and can avoid problems such as deformation or even failure of the mounting arm.

[0050] Specifically, the first connecting hole 121 is arranged at one end of the first connecting portion 12 away from the mounting portion 11, and the limiting member 2 is located at one end of the second connecting portion 13 away from the mounting portion 11, which is beneficial to avoiding interference between the mounting arm and the subframe and the steering knuckle.

[0051] In some embodiments, as Figure 1 shown, the first connecting component is a pin shaft or a bolt assembly (including a bolt and a nut), the first connecting hole 121 is a round hole, and the pin shaft or the bolt is inserted into the round hole.

[0052] In some embodiments, as Figure 1 shown, the second connecting component is an eccentric bolt assembly (including an eccentric bolt, a gasket, and a nut), the second connecting hole 21 is a first waist-shaped hole, the eccentric bolt is inserted into the first waist-shaped hole, and by adjusting the installation angle of the eccentric bolt, the purpose of adjusting the vehicle's camber angle can be achieved. Further, the limiting member 2 is further provided with a limiting structure 22, and the limiting structure 22 is located on the outer periphery of the first waist-shaped hole. When adjusting the installation angle of the eccentric bolt to adjust the vehicle's camber angle, the limiting structure 22 can play a limiting role on the gasket of the eccentric bolt, thereby restricting the rotation of the eccentric bolt.

[0053] Specifically, there are two limiting structures 22, and the two limiting structures 22 are respectively located on both sides of the first waist-shaped hole along its length direction, and then the gasket of the eccentric bolt is clamped by the two limiting structures 22 to restrict the rotation of the eccentric bolt.

[0054] In some embodiments, as Figure 1As shown, the elastic member is an air spring, and the mounting structure 111 is a mounting hole provided on a surface of one side of the mounting portion 11 along the second direction, so that the mounting shaft of the air spring can be inserted into the mounting hole, thereby limiting the air spring.

[0055] In some other embodiments, the elastic member is a coil spring, and the mounting structure 111 is a mounting groove provided on one side surface of the mounting portion 11 along the second direction, so that one end of the spring can be placed in the mounting groove to limit the spring.

[0056] In some embodiments, Figure 1 and Figure 2 As shown, the arm body 1 is provided with a through hole 15 penetrating along the first direction, which can ensure the rigidity of the arm body 1 while achieving lightweight.

[0057] In some embodiments, the arm body 1 is formed by extrusion of aluminum profiles, which not only facilitates platform and universal production, reduces the difficulty of processing the mounting arm, but also helps to achieve lightweight.

[0058] In some embodiments, the limiter 2 is made of metal steel. Of course, in other embodiments, the limiter 2 can also be made of other metals or alloys in the prior art, as long as the hardness of the limiter 2 is greater than the hardness of the arm body 1, and no limitation is made here.

[0059] In some embodiments, the limiting member 2 is disposed on one side of the second connecting portion 13 along the third direction, and the second connecting portion 13 is provided with a second waist-shaped hole 133 corresponding to the first waist-shaped hole; the first direction, the second direction and the third direction are perpendicular to each other.

[0060] Such an arrangement can improve the supporting effect of the second connecting portion 13 on the limiting member 2, ensure the installation stability of the limiting member 2, and at the same time will not interfere with the second connecting component passing through the first waist-shaped hole.

[0061] Specifically, the first waist-shaped hole is connected to the second waist-shaped hole 133, and the first waist-shaped hole and the second waist-shaped hole 133 are arranged opposite to each other along the third direction.

[0062] In some other embodiments, the limit member 2 is fixed to the end surface of the second connecting portion 13 away from the mounting portion 11. Preferably, the limit member 2 is a block structure, which can increase the contact area between the limit member 2 and the second connecting portion 13 and ensure the installation stability of the limit member 2.

[0063] In some embodiments, Figure 1 and Figure 3As shown, the first connecting portion 12 includes two first connecting ears 123, and the two first connecting ears 123 are arranged at intervals along the third direction, thereby forming a first U-shaped groove 122 between the two first connecting ears 123, and the first U-shaped groove 122 is arranged to penetrate along the second direction.

[0064] The provision of the first U-shaped groove 122 can not only facilitate the assembly of the mounting arm and the steering knuckle, but also avoid interference between the mounting arm and the steering knuckle during movement, and also has a weight-reducing effect, which is conducive to further achieving lightweight.

[0065] In some embodiments, Figure 1 and Figure 3 As shown, the second connecting portion 13 includes two second connecting ears 135, and the two second connecting ears 135 are arranged at intervals along the third direction, thereby forming a second U-shaped groove 134 between the two second connecting ears 135, and the second U-shaped groove 134 is arranged to penetrate along the second direction.

[0066] The provision of the second U-shaped groove 134 can not only facilitate the assembly of the mounting arm and the sub-frame, but also avoid interference between the mounting arm and the sub-frame during movement, and also has the effect of reducing weight, which is conducive to further achieving lightweight.

[0067] It should be noted that, during the processing, the first U-shaped groove 122 and the second U-shaped groove 134 are both formed by cutting edges of a mold.

[0068] In some embodiments, Figure 1 and Figure 2 As shown, the two first connecting ears 123 are each provided with a first connecting hole 121, so that the two ends of the first connecting assembly are respectively connected to the two first connecting holes 121, which is beneficial to improve the force uniformity of the mounting arm, and further improve the movement stability and service life of the mounting arm.

[0069] In some embodiments, Figure 1 and Figure 2 As shown, the two second connecting ears 135 are both provided with a limiter 2, so that the two ends of the second connecting assembly are respectively connected to the second connecting holes 21 of the two limiters 2, which is beneficial to improve the force uniformity of the mounting arm, and further improve the movement stability and service life of the mounting arm.

[0070] Specifically, the two stoppers 2 are respectively arranged on the sides of the two second connecting ears 135 that are away from each other along the third direction, so as to facilitate the assembly of the stoppers 2 on the second connecting portion 13. Further, the first waist-shaped holes of the two stoppers 2 are both arranged through along the third direction, the two second connecting ears 135 are both provided with second waist-shaped holes 133 that are arranged through along the third direction, and the two first waist-shaped holes are respectively arranged opposite to the two second waist-shaped holes 133 along the third direction.

[0071] In some embodiments, such as Figure 1 , Figure 5 and Figure 6 shown, the limiting structure 22 is a boss, and the boss is arranged on the side of the limiting member 2 away from the second connecting portion 13. With such a setting, the structure is simple and easy to process, and it will not interfere with the assembly of the limiting member 2 and the second connecting portion 13.

[0072] In some embodiments, such as Figure 1 and Figure 2 shown, the first connecting portion 12 is provided with a first groove 124, and the first connecting hole 121 is arranged in the first groove 124; the second connecting portion 13 is provided with a second groove 136, and the limiting member 2 is arranged in the second groove 136. With such a setting, the width of the mounting arm along the third direction can be reduced, which is beneficial to avoiding interference between the mounting arm and other structures of the vehicle and is more conducive to the overall vehicle layout.

[0073] In some embodiments, such as Figure 4 and Figure 6 shown, the limiting member 2 is fixedly connected to the second connecting portion 13 through a connecting structure, which can not only realize the assembly of the limiting member 2 made of different materials and the second connecting portion 13, but also has low assembly difficulty and is easy to operate.

[0074] In some embodiments, such as Figure 4 and Figure 6 shown, the connecting structure includes a first riveting structure 31 and a second riveting structure 32. The first riveting structure 31 is arranged on the second connecting portion 13, the second riveting structure 32 is arranged on the limiting member 2, and the first riveting structure 31 and the second riveting structure 32 are riveted and fixed. The limiting member 2 and the second connecting portion 13 are connected by riveting. Compared with the welding connection method, it is not only convenient for the quick assembly of the limiting member 2 and the second connecting portion 13, but also has low technical requirements for operators, which is beneficial to improving the assembly accuracy and reducing the cost.

[0075] In some embodiments, such as Figure 1 shown, the second connecting portion 13 includes a fixed end 131 and a connecting end 132. The limiting member 2 is located at the connecting end 132. The fixed end 131 is connected to the mounting portion 11, and the connecting end 132 extends obliquely along the first direction toward the side where the mounting structure 111 is located. In other words, from the fixed end 131 to the connecting end 132, the second connecting portion 13 extends obliquely toward the side where the mounting structure 111 is located relative to the mounting portion 11. With such a setting, on the one hand, the mounting arm can be adapted to the subframe and the steering knuckle, and on the other hand, it is beneficial to improve the rigidity of the arm body 1.

[0076] Specifically, the surface of the mounting portion 11 where the mounting structure 111 is provided and the surface of the second connecting portion 13 on the same side as the mounting structure 111 along the second direction are smoothly connected through a connecting arc surface 14. On the one hand, it is convenient for bending and forming through a bending die, and on the other hand, it is beneficial to ensure the fatigue performance of the mounting arm.

[0077] In some embodiments, as Figure 4 shown, one end of the first connecting portion 12 facing away from the mounting portion 11 is provided with a first chamfer 125; one end of the second connecting portion 13 facing away from the mounting portion 11 is provided with a second chamfer 137; at least one of the two opposite ends of the limiting member 2 along the length direction of the first waist-shaped hole is provided with a third chamfer 23.

[0078] By providing the first chamfer 125, the second chamfer 137 and the third chamfer 23, it can not only play a role in avoiding interference, so as to avoid interference between the mounting arm and the subframe and the steering knuckle during the movement process, but also has the effect of weight reduction.

[0079] Specifically, there are two first chamfers 125, and the two first chamfers 125 are respectively located on both sides of the first connecting portion 12 along the second direction. In other words, the surfaces on both sides of the first connecting portion 12 along the second direction are respectively connected to the end surface of the first connecting portion 12 facing away from the mounting portion 11 through a first chamfer 125.

[0080] Further, there are two second chamfers 137, and the two second chamfers 137 are respectively located on both sides of the second connecting portion 13 along the second direction. In other words, the surfaces on both sides of the second connecting portion 13 along the second direction are respectively connected to the end surface of the second connecting portion 13 facing away from the mounting portion 11 through the first and second chamfers 137.

[0081] Further, two third chamfers 23 are provided at both ends of the limiting member 2 along the length direction of the first waist-shaped hole. The two third chamfers 23 located at the same end of the limiting member 2 along the length direction of the first waist-shaped hole are respectively located on both sides of the limiting member 2 along the second direction. In other words, the end surfaces at both ends of the limiting member 2 along the length direction of the first waist-shaped hole and the end surfaces at both ends of the limiting member 2 along the width direction of the first waist-shaped hole are respectively connected through a third chamfer 23.

[0082] Exemplarily, the first chamfer 125, the second chamfer 137 and the third chamfer 23 are all rounded corners, and the avoidance effect is better.

[0083] In some embodiments, as Figure 1 and Figure 4 shown, a first avoidance structure 161 for avoiding the elastic member is provided at the connection between the mounting portion 11 and the first connecting portion 12. When the elastic member mounted on the mounting structure 111 moves, it will be deformed or tilted, resulting in an increase in the outer diameter of the elastic member. The provision of the first avoidance structure 161 can prevent the first connecting portion 12 from interfering with the movement of the elastic member.

[0084] In some embodiments, as Figure 1 and Figure 4As shown, at the connection between the installation part 11 and the second connection part 13, there is a second avoidance structure 162 for avoiding the elastic member. When the elastic member installed on the installation structure 111 moves, it will deform or tilt, resulting in an increase in the outer diameter of the elastic member. The setting of the second avoidance structure 162 can prevent the second connection part 13 from interfering with the movement of the elastic member.

[0085] In this embodiment, the quantity and setting positions of the first avoidance structure 161 and the second avoidance structure 162 are not limited, as long as they can prevent the first connection part 12 and the second connection part 13 from interfering with the movement of the elastic member.

[0086] Specifically, both the first avoidance structure 161 and the second avoidance structure 162 are avoidance grooves. The avoidance grooves are on the same side of the arm main body 1 as the installation structure 111, which can not only play the role of avoidance but also have the effect of weight reduction. The shape of the avoidance groove in this embodiment is not limited, as long as it can play the role of avoidance.

[0087] In some embodiments, as Figure 1 and Figure 3 shown, the installation part 11 is provided with a positioning structure 112 for connecting with the positioning part of the elastic member. When installing the elastic member, connecting the positioning part of the elastic member with the positioning structure 112 can ensure the consistency of the installation position of the elastic member and improve the assembly accuracy.

[0088] Exemplarily, the positioning structure 112 is a positioning hole, and the positioning part of the elastic member is a positioning pin.

[0089] In some embodiments, on both sides of the installation part 11 along the third direction, there are installation flanges. The installation flanges are on the same side of the installation part 11 along the second direction as the installation structure 111. On the one hand, the installation flanges can support the elastic member, and on the other hand, the setting of the installation flanges is beneficial to improving the rigidity of the installation part 11.

[0090] In some embodiments, as Figure 1 and Figure 2 shown, on both sides of the first connection part 12 along the third direction, there are first flanges. The first flanges are on the same side of the first connection part 12 along the second direction as the installation structure 111; on both sides of the second connection part 13 along the third direction, there are second flanges. The second flanges are on the same side of the second connection part 13 along the second direction as the installation structure 111; the two ends of the installation flange along the first direction are respectively connected with the first flange and the second flange to form an integral main flange 17. With such a setting, the rigidity of the installation arm can be improved through the main flange 17.

[0091] Specifically, along the third direction, the width of the installation flange is greater than the width of the first flange, and the width of the installation flange is greater than the width of the second flange, thereby improving the supporting effect of the installation flange on the elastic member.

[0092] For the mounting arm of this embodiment, the arm body 1 is integrally formed by aluminum profile extrusion. The limiting member 2 is made of metal steel and fixed to the second connecting portion 13 by riveting. It can not only meet the stiffness, strength and fatigue performance requirements of the whole vehicle, but also achieve lightweight. The weight of the mounting arm of this embodiment is about 1.3 kg, which can reduce the weight by 50% compared with the steel mounting arm.

[0093] As Figure 7 shown, Figure 7 the figure shows the mounting arms of two different vehicle models. As Figure 7 can be seen, the distances between the hard points at both ends of the two mounting arms in the first direction are different, the positions of the mounting structures 111 are different, and the positions of the first connection holes 121 are different. Except for this, the other structures and dimensions of the two mounting arms are the same. For the convenience of description, the mounting arm with a larger distance between the hard points at both ends in the first direction is denoted as the long mounting arm 10, and the mounting arm with a smaller distance between the hard points at both ends in the first direction is denoted as the short mounting arm 20. The long mounting arm 10 and the short mounting arm 20 can be formed by aluminum profile extrusion using the same extrusion die (i.e., the forming die of the long mounting arm 10), and then the second connecting portion 13 is bent using the same bending die. The first connection holes 121 and the mounting structures 111 can be completed by machining, so as to realize the production of the mounting arms of the two vehicle models through the same processing platform or equipment, and achieve platform-based and generalized production.

[0094] It should be noted that the shapes and widths of the first U-shaped grooves 122 of the long mounting arm 10 and the short mounting arm 20 (i.e., the distances between the two first connecting ears 123 in the third direction) are the same and can be cut out by the same model. Further, the shapes and widths of the second U-shaped grooves 134 of the long mounting arm 10 and the short mounting arm 20 (i.e., the distances between the two second connecting ears 135 in the third direction) are the same and can be cut out by the same model, which is beneficial to further realizing platform-based and generalized production.

[0095] In addition, the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Mounting arm, characterized in that, include: An arm body (1), the arm body (1) comprising an integrally formed mounting portion (11), a first connecting portion (12) and a second connecting portion (13), the first connecting portion (12) and the second connecting portion (13) being respectively connected to two ends of the mounting portion (11) along a first direction, a mounting structure (111) for mounting an elastic member is provided on one side of the mounting portion (11) along a second direction, the first connecting portion (12) being provided with a first connecting hole (121) for connecting to a steering knuckle; the first direction is perpendicular to the second direction; A limit member (2), the hardness of the limit member (2) is greater than the hardness of the arm body (1), the limit member (2) is fixedly connected to the second connecting portion (13), and the limit member (2) is provided with a second connecting hole (21) for connecting to the auxiliary frame.

2. The mounting arm according to claim 1, characterized in that, The second connecting hole (21) is a first waist-shaped hole, and the limiting component (2) is further provided with a limiting structure (22), wherein the limiting structure (22) is located on the outer periphery of the first waist-shaped hole.

3. The mounting arm according to claim 2, characterized in that, The limiting member (2) is arranged on one side of the second connecting portion (13) along the third direction, and the second connecting portion (13) is provided with a second waist-shaped hole (133) arranged corresponding to the first waist-shaped hole; the first direction and the second direction are perpendicular to the third direction in pairs.

4. The mounting arm according to claim 2, wherein The limiting structure (22) is a boss, and the boss is arranged on a side of the limiting member (2) that is away from the second connecting portion (13).

5. The mounting arm according to claim 1, characterized in that, The first connecting portion (12) comprises two first connecting ears (123), and the two first connecting ears (123) are arranged at intervals along the third direction; and / or, The second connecting portion (13) comprises two second connecting ears (135), and the two second connecting ears (135) are arranged at intervals along the third direction; The first direction, the second direction and the third direction are perpendicular to each other.

6. The mounting arm according to claim 5, characterized in that, The two first connecting ears (123) are both provided with the first connecting hole (121); and / or, The two second connecting ears (135) are both provided with the limiting member (2).

7. The mounting arm according to any one of claims 1 to 4, characterized in that, The mounting portion (11) is provided with a through hole (15) extending through the first direction.

8. The mounting arm according to any one of claims 1 to 4, characterized in that, The second connecting portion (13) comprises a fixed end (131) and a connecting end (132); the limiting member (2) is located at the connecting end (132); the fixed end (131) is connected to the mounting portion (11); and from the fixed end (131) to the connecting end (132), the second connecting portion (13) extends obliquely relative to the mounting portion (11) toward a side where the mounting structure (111) is located.

9. The mounting arm according to any one of claims 1 to 4, characterized in that, The limiting member (2) is fixedly connected to the second connecting portion (13) via a connecting structure, wherein the connecting structure comprises a first riveted structure (31) and a second riveted structure (32), wherein the first riveted structure (31) is arranged on the second connecting portion (13), and the second riveted structure (32) is arranged on the limiting member (2), and the first riveted structure (31) and the second riveted structure (32) are fixed by riveting.

10. The mounting arm according to any one of claims 1 to 4, characterized in that, A first avoidance structure (161) for avoiding the elastic member is provided at the connection between the mounting portion (11) and the first connection portion (12); and / or A second avoidance structure (162) for avoiding the elastic member is provided at the connection between the mounting portion (11) and the second connection portion (13); and / or, The mounting portion (11) is provided with a positioning structure (112) for connecting with the positioning portion of the elastic member; and / or, The first connection portion (12) is provided with a first groove (124), and the first connection hole (121) is arranged in the first groove (124); and / or, The second connection portion (13) is provided with a second groove (136), and the limiting member (2) is arranged in the second groove (136).

11. The mounting arm according to claim 1, characterized in that, Flanges (17) are provided on both sides of the arm main body (1) along the third direction, and the flanges (17) and the mounting structure (111) are on the same side of the arm main body (1) along the second direction; or, Flanges are provided on both sides of the mounting portion (11) along the third direction, and the flanges and the mounting structure (111) are on the same side of the mounting portion (11) along the second direction; The first direction, the second direction and the third direction are perpendicular to each other in pairs.

12. Suspension system, characterized in that, An elastic member and a mounting arm according to any one of claims 1 to 11, wherein the elastic member is mounted on the mounting structure (111).

13. Vehicle chassis, characterized in that, A subframe, a steering knuckle and a suspension system according to claim 12, wherein the steering knuckle is connected to the first connection hole (121) through a first connection assembly, and the subframe is connected to the second connection hole (21) through a second connection assembly.

14. A vehicle, characterized in that, A vehicle chassis according to claim 13 is included.

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