Automobile swing arm stable in connection

Abstract

The utility model relates to the field of automobile swing arms, in particular to a stably-connected automobile swing arm which comprises a swing arm body, the swing arm body is arranged in an A shape, corresponding lining assemblies are arranged at the two free ends of the swing arm body, a connecting clamp is arranged at the end, away from the lining assemblies, of the swing arm body, and the connecting clamp is fixedly connected with an external part. A first connecting hole is formed in the connecting clamp, a second connecting hole is formed in the end, close to the connecting clamp, of the swing arm body, and a mounting structure used for mounting the connecting clamp is arranged in the second connecting hole. The mounting structure comprises a mounting column, a limiting assembly arranged in the mounting column and used for limiting the connecting clamp, an adjusting assembly connected with the limiting assembly and used for adjusting the limiting assembly, and a connecting assembly used for limiting the mounting column. The mounting column penetrates through the first connecting hole and the second connecting hole and extends to the outside. Compared with the prior art, the mounting structure is arranged to replace chemical bonding, and the technical problem is solved in the aspect of non-pollution and repeatedly detachable rigid connection.

Description

Technical Field

[0001] This utility model relates to the field of automotive swing arms, specifically a stable and secure automotive swing arm. Background Technology

[0002] The control arm is a crucial component connecting the wheels and the vehicle body, typically used in the suspension system. It's a lever-like device responsible for supporting the wheels and enabling their vertical movement during driving. It also transmits wheel motion to the vehicle body, affecting handling and stability. The main functions of the control arm include: supporting the wheels (by connecting the wheels to the steering and suspension systems), mitigating vibrations (during driving, the control arm reduces vibrations caused by uneven road surfaces, bumps, or impacts, improving ride comfort), and maintaining tire contact with the road surface.

[0003] Chinese Patent No. CN222473846U discloses a stable automotive swing arm, including a swing arm. A connecting rod is fixedly connected to the right side of the swing arm, and fixed plates are fixedly connected to the upper and lower ends of the connecting rod. A bolt is threaded to the top of the fixed plate, and a movable plate is rotatably connected to the end of the bolt. Conical heads are fixedly connected to the front and rear sides of the bottom of the movable plate. A limiting mechanism is installed on the left side of the swing arm. The limiting mechanism includes a connecting shaft, which is rotatably connected to the left end of the swing arm. Inclined plates are fixedly connected to the upper and lower ends of the left side of the swing arm, and a spring is fixedly connected to the left side of the inclined plates.

[0004] In this invention, rotating two bolts drives the movable plate to descend. The clamping force exerted by the downward pressure of the movable plate increases the stability of the swing arm when connected to external components, avoiding loosening that can occur when using screws for fixing. However, the existing technology for a securely connected automotive swing arm has the following drawbacks during operation:

[0005] (1) The adhesive of the above-mentioned existing device relies on the passive release of the balloon, which poses a risk of contamination of components and uneven bonding thickness leading to failure;

[0006] (2) Existing technologies reduce the risk of overload damage to components by using spring buffers and stop column limiting mechanisms. However, the existing spring and stop column movement logic conflict, which can easily lead to structural fatigue with long-term use. Utility Model Content

[0007] The present invention aims to provide a stable automotive swing arm, mainly to solve the problem of existing technologies where adhesives rely on passive balloon release, which poses risks of component contamination and uneven bonding thickness leading to failure.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A securely connected automotive control arm includes a control arm body in an A-shape. Each of the two free ends of the control arm body has a corresponding bushing assembly. A connecting clip is located at the end of the control arm body furthest from the bushing assembly. The connecting clip is fixedly connected to an external component. A first connecting hole is provided on the connecting clip. A second connecting hole is provided at the end of the control arm body near the connecting clip. A mounting structure for mounting the connecting clip is provided within the second connecting hole. The mounting structure includes a mounting post, a limiting component disposed within the mounting post for limiting the connecting clip, an adjusting component connected to the limiting component for adjusting the limiting component, and a connecting component for limiting the mounting post. The mounting post passes through the first and second connecting holes and extends to the outside.

[0010] The working principle and beneficial effects of this utility model:

[0011] 1. Working Principle: This automotive swing arm transmits the force between the wheel and the vehicle body through the swing arm body itself, while the bushing assemblies at both ends flexibly absorb road vibrations. During assembly, the connecting clip is pre-clamped into the swing arm body as an external interface. The mounting post passes through the connecting clip and triggers the limit assembly at the hole in the body to automatically lock the edge of the connecting clip. The adjusting assembly provides elastic driving force to ensure that the locking takes effect immediately, and the connecting assembly then applies axial preload to resist vibration and loosening. During disassembly, the push rod is operated to release the lock.

[0012] 2. Beneficial effects:

[0013] (1) The existing technology solves the problem of loose connection of swing arm by setting up a double fixation solution of movable plate pressing cone and adhesive. However, the existing adhesive relies on the passive release of balloon, which poses the risk of contaminating parts and uneven bonding thickness leading to failure. This solution solves the technical problem by setting up an installation structure to replace chemical bonding and achieve a rigid connection that is pollution-free and can be repeatedly disassembled.

[0014] (2) This solution eliminates the dynamic limit mechanism and solves the technical problem by optimizing the rigidity of the A-shaped structure of the swing arm body and the vibration absorption characteristics of the bushing assembly, thereby reducing the generation of abnormal torque from the root.

[0015] Preferably, the limiting component includes several clearance grooves arranged in a circular array. The clearance grooves are located around the periphery of the mounting column. A first sliding groove is provided inside the mounting column, and the clearance grooves are connected to the first sliding groove. Each clearance groove is provided with a limiting block. The limiting block is fixedly connected to the inner wall of the corresponding clearance groove via a rotating shaft. A connecting block is fixedly connected to the inner side of the limiting block. Connecting ears are provided on both sides of the connecting block. The connecting ears are rotatably connected to the corresponding connecting block via a rotating shaft. Several connecting ears are fixedly connected to the same fixing block. The fixing block is located in the first sliding groove and is slidably connected to the inner wall of the first sliding groove. When the mounting column passes through the connecting hole of the connecting clamp and the swing arm body, the circular array of limiting blocks pops outward under the linkage of the internal mechanism. The inclined surface of the inner side of the limiting block fits tightly with the edge of the first connecting hole of the connecting clamp, forming a barbed mechanical lock to prevent the mounting column from falling out in the opposite direction. The sliding of the fixing block in the first sliding groove ensures that all limiting blocks move synchronously, achieving uniform force distribution.

[0016] Preferably, the adjusting assembly includes a guide post located on the side of the fixing block near the connecting ear. The guide post is fixedly connected to the side wall of the fixing block. A compression spring is sleeved around the guide post. One end of the compression spring is fixedly connected to the fixing block, and the other end is fixedly connected to the inner wall of the first slide groove. The first slide groove has a guide hole, and the compression spring is located inside the guide hole. The first connecting hole is slidably connected to the inner wall of the guide hole. After the mounting post is inserted into place, the spring releases its stored elastic potential energy, pushing the fixing block to move towards the connecting clamp, forcing the limiting block to rotate outward around the axis until its inclined surface clamps the connecting clamp. The guide post and the guide hole ensure that the spring accurately extends and retracts along the axis, avoiding jamming caused by skewing and ensuring the reliability of the locking action.

[0017] Preferably, a push rod is fixedly connected to the side of the fixing block away from the compression spring. A second sliding groove is provided on the inner wall of the mounting column. The push rod is located in the second sliding groove, passes through the second sliding groove and extends to the outside. The push rod is slidably connected to the inner wall of the second sliding groove. When disassembly is required, the exposed push rod is pushed to make the fixing block slide into the mounting column against the spring force. The connecting lug and the connecting block simultaneously pull all the limiting blocks inward and disengage from the connecting clamp. At this time, the mounting column can be safely pulled out, while the connecting clamp remains locked on the swing arm body.

[0018] Preferably, the connecting component includes a threaded groove, which is formed on the periphery of the mounting post. An internal threaded ring is threaded onto the threaded groove. The internal threaded ring abuts against and fits tightly against the swing arm body. After the mounting post is inserted and the limiting block is locked, the internal threaded ring is tightened so that its end face presses against the swing arm body. The axial preload generated by the thread eliminates the gap between the mounting post and the hole wall, enhances the overall connection rigidity, and prevents vibration and loosening.

[0019] Preferably, the bushing assembly includes a bushing, which is fixedly connected to the free end of the swing arm body. Fixing plates are provided at both ends of the bushing, and the fixing plates and corresponding bushings are integrally formed. Fixing holes are provided on the fixing plates. The bushing assembly achieves flexible connection and vibration isolation between the swing arm and the vehicle body. The elastic material of the bushing absorbs road impacts. The fixing plates are fixed to the vehicle body mounting points via bolts. The integrally formed structure improves durability, and the fixing holes provide standardized interfaces to ensure assembly consistency.

[0020] Preferably, the end of the limiting block near the connecting clamp is set with an inclined surface. The inclined surface of the limiting block near the connecting clamp is in close contact with and abuts against the connecting clamp. The core function of the inclined surface is to guide the insertion of the mounting post and assist in locking. During the insertion process, the edge of the connecting clamp hole contacts the inclined surface of the limiting block and squeezes it inward, allowing the mounting post to pass smoothly. When the limiting block completely passes through the connecting clamp, the spring pushes the inclined surface to form a self-locking inclined surface with the edge of the connecting clamp hole. The deeper the insertion, the greater the locking force, thus achieving anti-retraction protection. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a car swing arm with a stable connection, which is the subject of this utility model patent.

[0022] Figure 2 This is an exploded view of a securely connected car swing arm according to this utility model patent.

[0023] Figure 3 An exploded view of an installation structure for a securely connected automotive swing arm, which is part of this utility model patent.

[0024] Figure 4 This is a cross-sectional view of a mounting post for a securely connected automotive swing arm, which is part of this utility model patent.

[0025] Figure 5 This is a structural diagram of the fixing block area of ​​a car swing arm that is connected and stabilized according to this utility model patent.

[0026] The reference numerals in the accompanying drawings of the instruction manual include: 1. swing arm body; 2. bushing; 3. fixing plate; 4. connecting clamp; 5. first connecting hole; 6. second connecting hole; 7. mounting post; 8. clearance groove; 9. limiting block; 10. connecting block; 11. connecting ear; 12. fixing block; 13. first slide groove; 14. guide post; 15. compression spring; 16. guide hole; 17. push rod; 18. second slide groove; 19. threaded groove; 20. internal threaded ring; 21. fixing hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1 - Figure 5 As shown, a securely connected automotive control arm includes a control arm body 1, which is A-shaped. Both free ends of the control arm body 1 are provided with corresponding bushing assemblies. A connecting clip 4 is provided at the end of the control arm body 1 furthest from the bushing assembly. The connecting clip 4 is fixedly connected to an external component. A first connecting hole 5 is provided on the connecting clip 4. A second connecting hole 6 is provided at the end of the control arm body 1 closest to the connecting clip 4. A mounting structure for mounting the connecting clip 4 is provided within the second connecting hole 6. The mounting structure includes a mounting post 7, a limiting component disposed within the mounting post 7 for limiting the connecting clip 4, an adjusting component connected to the limiting component for adjusting the limiting component, and a connecting component for limiting the mounting post 7. The mounting post 7 passes through the first connecting hole 5 and the second connecting hole 6 and extends to the outside.

[0029] Specifically, the limiting component includes several clearance grooves 8 arranged in a circular array. The clearance grooves 8 are located on the periphery of the mounting column 7. The mounting column 7 has a first sliding groove 13 inside, and the clearance grooves 8 are connected to the first sliding groove 13. Each clearance groove 8 is provided with a limiting block 9. The limiting block 9 is fixedly connected to the inner wall of the corresponding clearance groove 8 through a rotating shaft. A connecting block 10 is fixedly connected to the inner side of the limiting block 9. Connecting ears 11 are provided on both sides of the connecting block 10. The connecting ears 11 are rotatably connected to the corresponding connecting block 10 through a rotating shaft. Several connecting ears 11 are fixedly connected to the same fixing block 12. The fixing block 12 is located in the first sliding groove 13 and is slidably connected to the inner wall of the first sliding groove 13.

[0030] In this embodiment, the initial state of the limiting block 9 is that it pops outward. When the mounting post 7 is inserted into the first connecting hole 5 of the connecting clamp 4, the wall of the first connecting hole 5 presses against the inclined surface of the limiting block 9, forcing the limiting block 9 to rotate inward around the axis and retract into the relief groove 8. At this time, the fixing block 12 slides along the first sliding groove 13 into the mounting post 7 and compresses the compression spring 15. After the mounting post 7 has completely passed through the connecting clamp 4, the limiting block 9 moves to the outside of the connecting clamp 4, and the compression spring 15 pushes the fixing block 12 to reset. Through the linkage of the connecting ear 11 and the connecting block 10, all the limiting blocks 9 pop outward synchronously, and their inclined surfaces form a mechanical interlock with the outer end face of the connecting clamp 4.

[0031] Specifically, the adjustment assembly includes a guide post 14, which is located on the side of the fixing block 12 near the connecting ear 11. The guide post 14 is fixedly connected to the side wall of the fixing block 12. A compression spring 15 is sleeved on the periphery of the guide post 14. One end of the compression spring 15 is fixedly connected to the fixing block 12, and the other end of the compression spring 15 is fixedly connected to the inner wall of the first slide groove 13. The first slide groove 13 has a guide hole 16, and the compression spring 15 is located in the guide hole 16. The first connecting hole 5 is slidably connected to the inner wall of the guide hole 16.

[0032] In this embodiment, the inner wall of the guide hole 16 is clearance-fitted with the guide post 14 to prevent the spring from deflecting. During assembly, the outer diameter of the mounting post 7 is transition-fitted with the guide hole 16 to ensure precise control of the spring pre-compression during the insertion process.

[0033] Specifically, a push rod 17 is fixedly connected to the side of the fixing block 12 away from the compression spring 15. A second sliding groove 18 is provided on the inner wall of the mounting column 7. The push rod 17 is located in the second sliding groove 18. The push rod 17 passes through the second sliding groove 18 and extends to the outside. The push rod 17 is slidably connected to the inner wall of the second sliding groove 18.

[0034] In this embodiment, during disassembly, the push rod 17 is pressed in the direction of the axis of the mounting column 7, which pushes the fixing block 12 to move against the spring force. The limiting block 9 is pulled into the relief groove 8 through the connecting ear 11. The length of the second slide groove 18 limits the stroke of the push rod 17 to avoid excessive compression and damage to the spring.

[0035] Specifically, the connecting component includes a threaded groove 19, which is formed on the periphery of the mounting post 7. An internal threaded ring 20 is threaded onto the threaded groove 19, and the internal threaded ring 20 abuts against and fits tightly against the swing arm body 1.

[0036] In this embodiment, the internal threaded ring 20 is a flange nut, and the flange surface in contact area with the swing arm body 1 is machined with serrated anti-slip texture. The fine thread of the threaded groove 19 generates axial preload, eliminating the assembly gap between the swing arm body 1 and the mounting column 7.

[0037] Specifically, the bushing assembly includes a bushing 2, which is fixedly connected to the free end of the swing arm body 1. Fixing plates 3 are provided at both ends of the bushing 2. The fixing plates 3 and the corresponding bushing 2 are integrally formed. Fixing holes 21 are provided on the fixing plates 3.

[0038] In this embodiment, the bushing 2 adopts a three-layer composite structure: the outer metal shell is welded to the swing arm body, the middle layer is hydrogenated nitrile rubber, the inner layer is a phosphated steel bushing, the fixing plate 3 has a thickness of ≥3mm, and the fixing hole 21 is a standard flange hole, which is matched with M10 bolts.

[0039] Specifically, the end of the limiting block 9 near the connecting clip 4 is set with an inclined surface, and the inclined surface of the end of the limiting block 9 near the connecting clip 4 is in close contact with and abuts against the connecting clip 4.

[0040] In this embodiment, the inclined surface of the limiting block 9 is designed to be 15°±1° and the surface is nitrided. When the limiting block 9 pops out and locks, the contact area between the inclined surface and the connecting clip 4 is ≥70%, generating a radial component force to enhance the locking reliability.

[0041] As can be seen from the above, the specific embodiments of this utility model are as follows:

[0042] Align the interface end of the connecting clip 4 with the second connecting hole 6 of the swing arm body 1, and press axially until the connecting clip 4 is engaged in the corresponding position. Hold the mounting post 7 and align its tip with the first connecting hole 5 of the connecting clip 4. When the mounting post 7 contacts the connecting clip 4, the inclined surface of the limiting block 9 is squeezed by the edge of the hole. The squeezing force forces the limiting block 9 to rotate axially inward and retract into the relief groove 8. The limiting block 9 pulls the fixing block 12 through the connecting block 10 and the connecting ear 11, causing it to slide along the first sliding groove 13. The fixing block 12 compresses the compression spring 15 on the guide post 14, storing elastic potential energy. When the mounting post 7 completely passes through the connecting clip 4, the limiting block 9 moves to the outside of the connecting clip 4, releases the squeezing, and the compression spring 15 releases energy, pushing the fixing block 12 to slide in the opposite direction. 12. The connecting ear 11 and connecting block 10 push all the limiting blocks 9 outward synchronously. The inclined surface of the limiting block 9 fits wedge-shaped with the outer end face of the connecting clamp 4 to form an anti-disengagement mechanical lock. The internal thread ring 20 is screwed into the thread groove 19 of the exposed end of the mounting post 7 and tightened with a torque wrench. The flange face of the internal thread ring 20 presses against the surface of the swing arm body 1, generating axial preload force, eliminating the fit gap between the mounting post 7 and the second connecting hole 6, and suppressing vibration and loosening. When it is necessary to separate the connection, the exposed end of the push rod 17 is continuously pressed. The push rod 17 pushes the fixing block 12 to compress the spring 15. The fixing block 12 pulls the limiting block 9 inward synchronously through the connecting ear 11 and connecting block 10. After the limiting block 9 is separated from the end face of the connecting clamp 4, the mounting post 7 is directly pulled out, and the mounting post 7 cancels the limitation on the connecting clamp 4.

[0043] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A securely connected automotive control arm, comprising a control arm body (1), characterized in that: The swing arm body (1) is A-shaped. Both free ends of the swing arm body (1) are provided with corresponding bushing assemblies. A connecting clip (4) is provided at the end of the swing arm body (1) away from the bushing assembly. The connecting clip (4) is fixedly connected to an external component. A first connecting hole (5) is provided on the connecting clip (4). A second connecting hole (6) is provided at the end of the swing arm body (1) near the connecting clip (4). An installation structure for installing the connecting clip (4) is provided in the second connecting hole (6). The installation structure includes a mounting post (7), a limiting component for limiting the connecting clip (4) provided in the mounting post (7), an adjusting component connected to the limiting component for adjusting the limiting component, and a connecting component for limiting the mounting post (7). The mounting post (7) passes through the first connecting hole (5) and the second connecting hole (6) and extends to the outside.

2. The automotive control arm with a stable connection according to claim 1, characterized in that: The limiting component includes several clearance grooves (8), which are arranged in a circular array. The clearance grooves (8) are opened on the periphery of the mounting column (7). The mounting column (7) has a first sliding groove (13) inside. The clearance grooves (8) are connected to the first sliding groove (13). Each clearance groove (8) is provided with a limiting block (9). The limiting block (9) is fixedly connected to the inner wall of the corresponding clearance groove (8) through a rotating shaft. A connecting block (10) is fixedly connected to the inner side of the limiting block (9). Connecting ears (11) are provided on both sides of the connecting block (10). The connecting ears (11) are rotatably connected to the corresponding connecting block (10) through a rotating shaft. Several connecting ears (11) are fixedly connected to the same fixing block (12). The fixing block (12) is located in the first sliding groove (13). The fixing block (12) is slidably connected to the inner wall of the first sliding groove (13).

3. A securely connected automotive control arm according to claim 2, characterized in that: The adjustment assembly includes a guide post (14), which is located on the side of the fixing block (12) near the connecting ear (11). The guide post (14) is fixedly connected to the side wall of the fixing block (12). A compression spring (15) is sleeved on the periphery of the guide post (14). One end of the compression spring (15) is fixedly connected to the fixing block (12), and the other end of the compression spring (15) is fixedly connected to the inner wall of the first slide groove (13). The first slide groove (13) has a guide hole (16), and the compression spring (15) is located in the guide hole (16). The first connecting hole (5) is slidably connected to the inner wall of the guide hole (16).

4. A securely connected automotive control arm according to claim 3, characterized in that: A push rod (17) is fixedly connected to the side of the fixed block (12) away from the compression spring (15). A second sliding groove (18) is provided on the inner wall of the mounting column (7). The push rod (17) is located in the second sliding groove (18). The push rod (17) passes through the second sliding groove (18) and extends to the outside. The push rod (17) is slidably connected to the inner wall of the second sliding groove (18).

5. A securely connected automotive control arm according to claim 1, characterized in that: The connecting assembly includes a threaded groove (19) which is formed on the periphery of the mounting post (7). An internal threaded ring (20) is threaded onto the threaded groove (19), and the internal threaded ring (20) abuts against and fits tightly against the swing arm body (1).

6. A securely connected automotive control arm according to claim 1, characterized in that: The bushing assembly includes a bushing (2), which is fixedly connected to the free end of the swing arm body (1). Fixing plates (3) are provided at both ends of the bushing (2). The fixing plates (3) and the corresponding bushing (2) are integrally formed. Fixing holes (21) are provided on the fixing plates (3).

7. A securely connected automotive control arm according to claim 2, characterized in that: The end of the limiting block (9) near the connecting clip (4) is set with an inclined surface, and the inclined surface of the end of the limiting block (9) near the connecting clip (4) is closely attached to and abuts against the connecting clip (4).

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