Lower swing arm assembly easy to disassemble and assemble

Abstract

The lower swing arm assembly comprises a lower swing arm body, a lining assembly, a ball pin assembly and a second elastic check ring, a first installation hole and a second installation hole are formed in the lower swing arm body, and a boss and a first clamping groove which are located on the inner walls of the two ends of the first installation hole are formed in the lower swing arm body. The bushing assembly comprises a pin shaft, a rubber body and a first elastic check ring, the rubber body is arranged in the first mounting hole, the rubber body abuts against the boss and the first elastic check ring, the first elastic check ring is clamped and embedded in the first clamping groove, the ball pin assembly is connected with the second mounting hole, a second clamping groove is formed in the end of the ball pin assembly, and the second clamping groove is connected with the second mounting hole. The second elastic check ring is clamped and embedded in the second mounting hole and the second clamping groove; one end, placed in the first mounting hole, of the rubber body abuts against the boss, meanwhile, the first elastic check ring is placed at the other end of the rubber body and pressed downwards, the rubber body is extruded to expand, and mounting is convenient; and the ball pin assembly can be axially limited through the arranged second elastic check ring.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a lower control arm assembly which is easy to disassemble and assemble. Background Art

[0002] The existing suspension system adopts a double-wishbone independent suspension structure. The control arm assembly in the double-wishbone independent suspension structure connects the wheel side reducer and the vehicle body.

[0003] Among them, the control arm is connected to the vehicle body connection end through a rubber bushing structure. The bushing and the control arm are press-fitted with interference, and the installation and disassembly process is extremely difficult.

[0004] Among them, the control arm is connected to the connection end of the wheel side reducer through a ball pin structure. The control arm and the ball pin are connected by threads, and in order to prevent the ball pin from loosening, glue application treatment is required. The above glue application brings inconvenience to the disassembly and assembly process of the ball pin.

[0005] Therefore, the disassembly and assembly of the control arm, the bushing and the ball pin are extremely inconvenient. Summary of the Utility Model

[0006] In view of this, it is necessary to provide a lower control arm assembly which is easy to disassemble and assemble to solve the problem that the disassembly and assembly of the control arm, the bushing and the ball pin in the existing control arm assembly are extremely inconvenient.

[0007] The utility model provides a lower control arm assembly which is easy to disassemble and assemble, including a lower control arm body, a bushing assembly, a ball pin assembly and a second snap ring. The lower control arm body is formed with a first mounting hole and a second mounting hole, and is formed with a boss and a first clamping groove at the inner walls at both ends of the first mounting hole. The bushing assembly includes a pin shaft, a rubber body sleeved outside the pin shaft and a first snap ring. The diameter of the rubber body in the free state is smaller than the aperture of the first mounting hole. The rubber body is placed inside the first mounting hole. The two ends of the rubber body are respectively abutted against the boss and the first snap ring. The first snap ring is clamped in the first clamping groove. The distance between the first clamping groove and the boss is smaller than the sum of the length of the rubber body in the free state and the thickness of the first snap ring. The ball pin assembly is connected to the second mounting hole through a thread surface formed on its outer wall. A second clamping groove is formed at the end of the ball pin assembly. The second snap ring is clamped in the second mounting hole and the second clamping groove to limit the axial position of the ball pin assembly.

[0008] Furthermore, the number of the first mounting holes and the bushing assemblies is two and they are coaxially arranged.

[0009] Further, it further includes fixing retaining rings arranged at both ends of the rubber body, the outer diameters of the two fixing retaining rings gradually expand in opposite directions, the outer diameter of the fixing retaining ring is greater than the inner diameter of the first elastic retaining ring, one of the fixing retaining rings abuts against the boss, and the other fixing retaining ring abuts against the first elastic retaining ring.

[0010] Further, the inner diameter of the boss is smaller than the outer diameter of the rubber body, and the outer diameter of the boss is equal to the aperture of the first mounting hole.

[0011] Further, a tapered surface connected to the wheel side reducer is formed on the outer wall of one end of the ball pin assembly, and the tapered surface gradually expands in the direction close to the lower swing arm body.

[0012] Further, it further includes a cover plate, the cover plate is arranged at one end of the second mounting hole close to the second elastic retaining ring and is detachably connected to the lower swing arm body, and the cover plate abuts against the second elastic retaining ring.

[0013] Further, the cover plate is connected to the fixing hole formed on the lower swing arm body via screws.

[0014] Further, a shock absorber mounting end and a steering limit end are arranged on the lower swing arm body.

[0015] Further, a stabilizer bar hanger connection hole and a surface process hole are formed on the lower swing arm body, and a plug is installed in the surface process hole.

[0016] Further, a plurality of hollow parts are formed on the lower swing arm body.

[0017] Compared with the prior art, when installing the bushing assembly, since the diameter of the rubber body in the free state is smaller than the aperture of the first mounting hole, the rubber body has a clearance fit with the first mounting hole, which is convenient for insertion. One end of the rubber body inserted into the first mounting hole abuts against the boss. At the same time, the first elastic retaining ring is placed at the other end of the rubber body and the first elastic retaining ring is pressed down. Since the distance between the first card slot and the boss is smaller than the sum of the length of the rubber body in the free state and the thickness of the first elastic retaining ring, the rubber body is squeezed and expanded, so as to achieve an interference fit with the second mounting hole. At the same time, the second elastic retaining ring is snapped into the first card slot to realize the axial limit of the rubber body, and the installation is convenient; when installing the ball pin assembly, after the ball pin assembly is threadedly connected to the second mounting hole, the axial limit of the ball pin assembly can be realized through the arranged second elastic retaining ring, without gluing, which is convenient for disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the overall lower swing arm assembly provided by the embodiment of the present utility model that is easy to disassemble and assemble;

[0019] Figure 2 The structural schematic diagram of the lower control arm body in the easily disassembled and assembled lower control arm assembly provided by the embodiment of the present utility model;

[0020] Figure 3 The installation schematic diagram of the bushing assembly in the easily disassembled and assembled lower control arm assembly provided by the embodiment of the present utility model;

[0021] Figure 4 The structural schematic diagram of the ball pin assembly in the easily disassembled and assembled lower control arm assembly provided by the embodiment of the present utility model;

[0022] Figure 5 The installation schematic diagram of the cover plate in the easily disassembled and assembled lower control arm assembly provided by the embodiment of the present utility model. Detailed implementation manners

[0023] Next, the preferred embodiments of the present utility model will be specifically described with reference to the accompanying drawings. The accompanying drawings form a part of this application and are used together with the embodiments of the present utility model to explain the principle of the present utility model, rather than to limit the scope of the present utility model.

[0024] As Figures 1-4 shown, an easily disassembled and assembled lower control arm assembly provided by the present utility model includes a lower control arm body 1, a bushing assembly 2, a ball pin assembly 4, and a second snap ring 5. The lower control arm body 1 is formed with a first mounting hole 11 and a second mounting hole 14, and is formed with a boss and a first card slot at the inner walls at both ends of the first mounting hole 11. The bushing assembly 2 includes a pin shaft 21, a rubber body 22 sleeved outside the pin shaft 21, and a first snap ring 3. The diameter of the rubber body 22 in the free state is smaller than the aperture of the first mounting hole 11. The rubber body 22 is placed inside the first mounting hole 11. Both ends of the rubber body 22 are respectively in contact with the boss and the first snap ring 3. The first snap ring 3 is snap-fitted into the first card slot. The distance between the first card slot and the boss is smaller than the sum of the length of the rubber body 22 in the free state and the thickness of the first snap ring 3. The ball pin assembly 4 is connected to the second mounting hole 14 through a thread surface 41 formed on its outer wall. A second card slot 42 is formed at the end of the ball pin assembly 4. The second snap ring 5 is snap-fitted into the second mounting hole 14 and the second card slot 42 to limit the axial position of the ball pin assembly 4.

[0025] When installing the bushing assembly 2, since the diameter of the rubber body 22 in the free state is smaller than the aperture of the first mounting hole 11, the rubber body 22 is in clearance fit with the first mounting hole 11, facilitating insertion. One end of the rubber body 22 placed in the first mounting hole 11 abuts against the boss. At the same time, the first elastic retaining ring 3 is placed at the other end of the rubber body 22 and the first elastic retaining ring 3 is pressed down. Since the distance between the first card slot and the boss is smaller than the sum of the length of the rubber body 22 in the free state and the thickness of the first elastic retaining ring 3, the rubber body 22 is extruded and expanded, thereby achieving an interference fit with the second mounting hole 14. At the same time, the second elastic retaining ring 5 is snapped into the first card slot to achieve axial limitation of the rubber body 22, and the installation is convenient.

[0026] When installing the ball pin assembly 4, after the ball pin assembly 4 is threadedly connected to the second mounting hole 14, the second elastic retaining ring 5 provided can axially limit the ball pin assembly 4, eliminating the need for gluing and facilitating disassembly and assembly.

[0027] In the lower control arm body 1 of this embodiment, a first mounting hole 11 and a second mounting hole 14 are formed, and bosses and a first card slot located at both ends of the first mounting hole 11 are formed on the inner wall. Among them, the first mounting hole 11 is used to install the bushing assembly 2 connected to the body connection end, and the second mounting hole 14 is used to install the ball pin assembly 4 connected to the wheel side reducer.

[0028] Among them, the number of the first mounting holes 11 and the bushing assemblies 2 is two and they are coaxially arranged.

[0029] The bushing assembly 2 in this embodiment includes a pin shaft 21, a rubber body 22 sleeved outside the pin shaft 21, and a first elastic retaining ring 3. The diameter of the rubber body 22 in the free state is smaller than the aperture of the first mounting hole 11. The rubber body 22 is placed inside the first mounting hole 11. Both ends of the rubber body 22 respectively abut against the boss and the first elastic retaining ring 3. The first elastic retaining ring 3 is snap-fitted into the first card slot, and the distance between the first card slot and the boss is smaller than the sum of the length of the rubber body 22 in the free state and the thickness of the first elastic retaining ring 3.

[0030] To prevent friction from occurring between the edges at both ends of the rubber body and the boss and the first elastic retaining ring 3 respectively, in one embodiment, it further includes fixed retaining rings 23 provided at the edges at both ends of the rubber body. The outer diameters of the two fixed retaining rings 23 gradually expand in opposite directions. The outer diameter of the fixed retaining ring 23 is larger than the inner diameter of the first elastic retaining ring 3. One of the fixed retaining rings 23 abuts against the boss, and the other fixed retaining ring 23 abuts against the first elastic retaining ring 3.

[0031] Wherein, the inner diameter of the boss is smaller than the outer diameter of the rubber body 22, and the outer diameter of the boss is equal to the aperture diameter of the first mounting hole 11.

[0032] In this embodiment, the ball pin assembly 4 cooperates with the second snap ring 5 to achieve the connection with the lower control arm body 1. The ball pin assembly 4 is connected to the second mounting hole 14 via a threaded surface 41 formed on its outer wall. A second card slot 42 is formed at the end of the ball pin assembly 4, and the second snap ring 5 is clamped in the second mounting hole 14 and the second card slot 42 to limit the axial position of the ball pin assembly 4.

[0033] As Figure 4 shown, in one embodiment, a tapered surface 43 for connecting with a wheel side reducer is formed at the outer wall of one end of the ball pin assembly 4, and the tapered surface 43 gradually expands in the direction close to the lower control arm body 1.

[0034] As Figure 5 shown, to limit the movement of the second snap ring 5 relative to the second mounting hole 14 in the axial direction, in one embodiment, a cover plate 6 is further included. The cover plate 6 is arranged at one end of the second mounting hole 14 close to the second snap ring 5 and is detachably connected to the lower control arm body 1. The cover plate 6 abuts against the second snap ring 5. At the same time, the cover plate 6 can also seal the end of the ball pin to prevent sediment from accumulating on the ball pin assembly 4, causing rust on the thread and machined surface.

[0035] In this embodiment, the cover plate 6 is connected to a fixing hole 16 formed on the lower control arm body 1 via a screw 7. Of course, in other preferred embodiments, other connection methods can also be adopted between the cover plate 6 and the lower control arm body 1, such as snap connection, etc., which are not limited herein.

[0036] In one embodiment, a shock absorber mounting end 12 and a steering limit end 15 are arranged on the lower control arm body 1.

[0037] In one embodiment, a stabilizer bar hanger connection hole 13 and a surface process hole 17 are formed on the lower control arm body 1, and a plug 8 is installed in the surface process hole 17. The surface process hole 17 is used to fix the position of the casting core.

[0038] In one embodiment, a plurality of hollowings are formed on the lower control arm body 1. The mass of the swing arm body can be reduced, and the unsprung mass of the whole vehicle can be decreased. Among them, the hollowings on the lower control arm body 1 are regular round holes with consistent sizes, which are convenient for the plugs 8 in cooperation with them to be unified in type and reduce the number of molds. Of course, the hollowings can also adopt shapes such as triangles or rectangles.

[0039] Compared with the prior art: when installing the bushing assembly 2, since the diameter of the rubber body 22 in the free state is smaller than the aperture of the first mounting hole 11, the rubber body 22 is in clearance fit with the first mounting hole 11, which is convenient for insertion. One end of the rubber body 22 placed in the first mounting hole 11 abuts against the boss. At the same time, the first elastic retaining ring 3 is placed at the other end of the rubber body 22 and the first elastic retaining ring 3 is pressed down. Since the distance between the first card slot and the boss is smaller than the sum of the length of the rubber body 22 in the free state and the thickness of the first elastic retaining ring 3, the rubber body 22 is expanded by extrusion, so as to achieve an interference fit with the second mounting hole 14. At the same time, the second elastic retaining ring 5 is snapped into the first card slot to realize the axial limit of the rubber body 22, and the installation is convenient.

[0040] When installing the ball pin assembly 4, after the ball pin assembly 4 is threadedly connected to the second mounting hole 14, the second elastic retaining ring 5 provided can axially limit the ball pin assembly 4, without gluing, which is convenient for disassembly and assembly.

[0041] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A lower arm assembly that is easy to disassemble and assemble, characterized in that: include: A lower swing arm body, which is formed with a first mounting hole and a second mounting hole, and is formed with bosses and a first clamping groove located at inner walls at both ends of the first mounting hole; A bushing assembly, comprising a pin shaft, a rubber body sleeved outside the pin shaft, and a first elastic retaining ring, wherein the diameter of the rubber body in a free state is smaller than the aperture of the first mounting hole, the rubber body is placed in the first mounting hole, the two ends of the rubber body are respectively in contact with the boss and the first elastic retaining ring, the first elastic retaining ring is clamped in the first clamping groove, and the distance between the first clamping groove and the boss is smaller than the sum of the length of the rubber body in a free state and the thickness of the first elastic retaining ring; A ball and pin assembly and a second elastic retaining ring, wherein the ball and pin assembly is connected to the second mounting hole via a threaded surface formed on its outer wall, a second slot is formed at the end of the ball and pin assembly, and the second elastic retaining ring is embedded in the second mounting hole and the second slot to limit the axial position of the ball and pin assembly.

2. The easily disassembled lower arm assembly according to claim 1 is characterized in that: The number of the first mounting holes and the number of the bushing assemblies are both two and they are coaxially arranged.

3. The easily disassembled lower arm assembly according to claim 1 is characterized in that: It also includes fixed retaining rings arranged at the edges of both ends of the rubber body, the outer diameters of the two fixed retaining rings gradually expand in opposite directions, the outer diameters of the fixed retaining rings are larger than the inner diameter of the first elastic retaining ring, one of the fixed retaining rings abuts against the boss, and the other fixed retaining ring abuts against the first elastic retaining ring.

4. The easily disassembled lower arm assembly according to claim 3 is characterized in that: The inner diameter of the boss is smaller than the outer diameter of the rubber body, and the outer diameter of the boss is equal to the hole diameter of the first mounting hole.

5. The easily disassembled lower arm assembly according to claim 1 is characterized in that: A conical surface connected to the wheel-side reducer is formed on the outer wall of one end of the ball and pin assembly, and the conical surface gradually expands in a direction approaching the lower swing arm body.

6. The easily disassembled lower arm assembly according to claim 1, characterized in that: It also includes a cover plate, which is arranged at one end of the second mounting hole close to the second elastic retaining ring and is detachably connected to the lower swing arm body, and the cover plate abuts against the second elastic retaining ring.

7. The easily disassembled lower arm assembly according to claim 6, characterized in that: The cover plate is connected to a fixing hole formed on the lower swing arm body via screws.

8. The easily disassembled lower arm assembly according to claim 1, characterized in that: The lower swing arm body is provided with a shock absorber mounting end and a steering limit end.

9. The easily disassembled lower arm assembly according to claim 1, characterized in that: The lower swing arm body is formed with a stabilizer rod connecting hole and a surface processing hole, and a plug is installed in the surface processing hole.

10. The easily disassembled lower arm assembly according to claim 1, characterized in that: A plurality of hollows are formed on the lower swing arm body.

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