Automobile rear trailing arm bushing press-fitting device

Abstract

The utility model discloses an automobile rear trailing arm lining press-fitting device which is characterized by comprising a press-fitting mechanism and a supporting and positioning mechanism. The press-fitting mechanism comprises a lining press-fitting upper connecting plate and a lining pressing head. The supporting and positioning mechanism comprises a bottom plate, and a rear trailing arm welding assembly positioning unit, a trailing arm press fitting supporting pin and a trailing arm assembly limiting pin are arranged on the bottom plate. The rear trailing arm welding assembly positioning unit comprises a longitudinal bushing press-fitting positioning seat, a trailing arm bushing press-fitting positioning disc is arranged on the longitudinal bushing press-fitting positioning seat, a trailing arm bushing press-fitting floating centering sleeve is movably arranged in the longitudinal bushing press-fitting positioning seat, and a guide spring is arranged below the trailing arm bushing press-fitting floating centering sleeve. And a longitudinal arm bushing press-fitting positioning pin is arranged above the longitudinal arm bushing press-fitting floating centering sleeve. The bushing press fitting device is reasonable in structural design, small in occupied area and high in universality, bushing press fitting can be completed by means of an existing common press machine, and the bushing press fitting device can quickly adapt to product design structure change.

Description

Technical Field

[0001] This utility model relates to a pressing device for a rear longitudinal control arm bushing of an automobile, belonging to the field of automobile parts processing and manufacturing technology. Background Technology

[0002] The rear trailing arm is a crucial component of the suspension system. Its main functions include: connecting the wheels to the vehicle body, supporting the wheels and transmitting their forces; maintaining the correct wheel position to ensure driving stability and prevent excessive wheel misalignment; bearing vertical, longitudinal, and lateral forces from the wheels and transmitting them to the vehicle body; and working in conjunction with shock absorbers, springs, and other components to reduce road impacts and improve comfort. Automotive bushings, with their excellent vibration isolation, good elasticity, and damping characteristics, are indispensable components in automobiles and are commonly used in automotive suspension mechanisms. A well-designed structure of automotive bushings can ensure good handling stability and ride comfort for the entire vehicle. During vehicle operation, the rear trailing arm bushings are capable of withstanding tension, compression, torsion, and yaw.

[0003] After the vehicle design is completed, multiple rounds of assembly and testing verification are required. This involves multiple rounds of verification of the performance parameters of components such as the chassis and engine. For newly designed and developed vehicle models, customers will require chassis suppliers to provide multiple rounds of sample parts for trial assembly. Due to the uncertainty of the verification results, it is necessary to modify the structural design of the rear trailing arm or bushing as needed based on customer verification. In mass production, rubber bushing press-fitting is mostly completed using specialized press-fitting equipment, which is highly efficient and has good dimensional consistency, but it has a long cycle, requires significant investment, and is highly specialized, making it unsuitable for changes to the product structure. If specialized press-fitting equipment is designed and developed during the testing phase, it may face modification or even scrapping if the design is modified during customer verification, which is risky, costly, and the timeline may not meet the OEM's sample submission requirements. Utility Model Content

[0004] The purpose of this invention is to provide an automotive trailing arm bushing press-fitting device to solve the problems of high upfront costs, strong specialization making it unable to adapt to product design changes, and long sample delivery cycles associated with existing press-fitting machines. Its structure is rationally designed, the device occupies a small area, and is highly versatile, utilizing existing ordinary presses to complete bushing press-fitting. This shortens the processing and manufacturing cycle of the bushing press-fitting device while ensuring product quality. It can quickly adapt to changes in product design structure, meet sample delivery cycles, and one set of equipment is compatible with the press-fitting of left and right rear trailing arm bushings, saving manufacturing costs and improving product competitiveness in the market.

[0005] The technical solution adopted by this utility model is: a pressing device for rear trailing arm bushing of automobile chassis, characterized in that: it includes a pressing mechanism and a support and positioning mechanism;

[0006] The pressing mechanism includes a bushing pressing upper connecting plate and a bushing pressing head, which are slidably fitted together and fixed by bolts;

[0007] The support and positioning mechanism includes a base plate, on which a rear trailing arm welding assembly positioning unit, a trailing arm press-fit support pin, and a trailing arm assembly limit pin are provided.

[0008] The rear trailing arm welding assembly positioning unit includes a longitudinal bushing press-fit positioning seat, a trailing arm bushing press-fit positioning plate is provided on the longitudinal bushing press-fit positioning seat, a trailing arm bushing press-fit floating centering sleeve is movably arranged inside the longitudinal bushing press-fit positioning seat, a guide spring is provided below the trailing arm bushing press-fit floating centering sleeve, and a trailing arm bushing press-fit positioning pin is provided above the trailing arm bushing press-fit floating centering sleeve.

[0009] Furthermore, it also includes a longitudinal arm bushing press-fit anti-misalignment block, which is fixed to the base plate by bolts and has a planar limiting fit with the longitudinal bushing press-fit positioning seat.

[0010] Furthermore: the trailing arm press-fit support pin and the trailing arm assembly limit pin are set on the base plate by threaded connection; a polyurethane pad is provided on the trailing arm assembly limit pin.

[0011] The beneficial effects of this utility model are as follows: The bushing pressing mechanism of this utility model consists of an upper connecting plate and an upper pressing head. The upper connecting plate is bolted to the press, and the upper pressing head is screwed into the middle of the upper connecting plate. The rear trailing arm positioning mechanism is an integral structure, enabling the pressing of both left and right rear trailing arm assemblies. Its structural design is reasonable, the device occupies a small area, and it is highly versatile. Bushing pressing can be completed using existing ordinary presses. It shortens the processing and manufacturing cycle of the bushing pressing device while ensuring product quality. It can quickly adapt to changes in product design structure, meet sample delivery cycles, and one set of equipment is compatible with pressing both left and right front lower control arm bushings, saving manufacturing costs and improving the product's competitiveness in the market. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 is a schematic diagram of the working state of this utility model;

[0014] Figure 2 is a schematic diagram of the overall structure of this utility model;

[0015] Figure 3 is a schematic diagram of the rear longitudinal arm support unit structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the rear longitudinal arm press-fit base plate structure of this utility model.

[0017] The numbers in the diagram are explained as follows: 1. Rear longitudinal arm welding assembly; 2. Rear longitudinal arm bushing assembly; 3. Bushing pressing device; 4. Rear longitudinal bushing pressing upper connecting plate; 5. Rear longitudinal arm bushing press head; 6. Rear arm welding assembly positioning unit; 7. Base plate; 8. Rear longitudinal arm pressing support pin; 9. Rear longitudinal arm pressing limit pin; 10. Polyurethane pad; 11. Rear longitudinal arm bushing pressing positioning pin; 12. Rear longitudinal arm bushing pressing floating centering sleeve; 13. Longitudinal arm bushing pressing positioning plate; 14. Rear longitudinal arm bushing pressing positioning seat; 15. Guide spring; 16. Flat key; 17. Rear longitudinal arm bushing pressing anti-misalignment block. Detailed Implementation

[0018] according to Figures 1-4 The specific structure of this utility model will be described in detail.

[0019] A pressing device for rear trailing arm bushings of an automobile chassis includes a pressing mechanism 3 and a support and positioning mechanism;

[0020] The pressing mechanism 3 includes a bushing pressing upper connecting plate 4 and a bushing pressing head 5, which are slidably fitted together and fixed by bolts;

[0021] The support and positioning mechanism includes a base plate 7, on which a rear longitudinal arm welding assembly positioning unit 6, a longitudinal arm press-fit support pin 8, and a longitudinal arm assembly limit pin 9 are provided.

[0022] The rear trailing arm welding assembly positioning unit 6 includes a longitudinal bushing press-fit positioning seat 14, on which a trailing arm bushing press-fit positioning plate 13 is provided. A trailing arm bushing press-fit floating centering sleeve 12 is movably arranged inside the longitudinal bushing press-fit positioning seat 14. A guide spring 15 is provided below the trailing arm bushing press-fit floating centering sleeve 12, and a trailing arm bushing press-fit positioning pin 11 is provided above the trailing arm bushing press-fit floating centering sleeve 12.

[0023] Preferably, it also includes a longitudinal arm bushing press-fit anti-misalignment block 17, which is fixed to the base plate 7 by bolts and has a planar limiting fit with the longitudinal bushing press-fit positioning seat 14.

[0024] Preferably, the trailing arm press-fit support pin 8 and the trailing arm assembly limit pin 9 are set on the base plate 7 by threaded connection; a polyurethane pad 10 is provided on the trailing arm assembly limit pin 9.

[0025] Preferably, the upper connecting plate is fixed to the press by bolts, and the bushing press head is slidably connected to the middle position of the upper connecting plate and locked and positioned by the fastening bolts on the side; the bushing pressing mechanism can adjust the relative position of the upper connecting plate and the press by the bolts on the upper connecting plate, thereby adjusting the position of the upper press head to ensure that it is coaxial with the bushing.

[0026] Preferably, two sets of support pins and positioning pins are symmetrically arranged on the base plate, corresponding to the left and right parts of the rear trailing arm assembly, respectively. The rear trailing arm press-fit support pins and rear trailing arm press-fit limit pins are installed on the base plate, cooperating with the upper surface of the positioning sleeve to fix and support the rear trailing arm. Among them, the rear trailing arm press-fit support pins and rear trailing arm press-fit limit pins are installed on the base plate with an interference fit.

[0027] The following examples further illustrate this solution.

[0028] A rear trailing arm bushing pressing device for an automobile chassis includes a press, a pressing mechanism, and a base plate. The pressing mechanism includes a bushing pressing upper connecting plate 4 and a bushing pressing head 5. The upper connecting plate and the pressing head are in a sliding fit with a stop and are connected by a bolt. The upper connecting plate 10 is connected to the upper end of the press by bolts.

[0029] The base plate 7 includes a rear trailing arm welding assembly positioning unit 6, a trailing arm press-fit support pin 8, a trailing arm assembly limit pin 9, and a trailing arm bushing press-fit anti-misalignment block 17.

[0030] The longitudinal arm welding assembly positioning unit includes a longitudinal arm bushing positioning pin 11, a longitudinal arm bushing press-fit floating positioning sleeve 12, a longitudinal arm bushing press-fit positioning plate 13, a longitudinal arm bushing press-fit positioning seat 14, a guide spring 15, and a flat key 16.

[0031] The rear longitudinal arm press-fit support pin 8 is threadedly connected to the base plate 7 to support the rear longitudinal arm; the rear longitudinal arm press-fit limiting pin 9 is threadedly connected to the base plate 7 and mates with the process hole on the rear longitudinal arm for limiting position; the longitudinal arm bushing press-fit positioning seat 14 is fixedly connected to the base plate 7 with four bolts for supporting and limiting the rear longitudinal arm; the polyurethane pad 10 is interference-fitted onto the limiting pin 9 to protect the workpiece and prevent wear; the guide spring 16 is placed below the longitudinal arm bushing press-fit floating centering sleeve 12, with the lower end of the spring 16 mates with the positioning seat and the upper end set inside the longitudinal arm bushing press-fit floating centering sleeve 12, providing a buffering effect during press-fitting; The longitudinal arm bushing press-fit floating centering sleeve 12 and the longitudinal arm bushing press-fit positioning seat 14 are in sliding fit; the flat key 16 and the longitudinal bushing press-fit positioning seat 14 are bolted together to guide the longitudinal arm bushing press-fit floating centering sleeve 12; the longitudinal arm bushing press-fit floating centering sleeve 12 has a keyway, and during the press-fitting process, the press-fit floating centering sleeve slides along the flat key; the longitudinal arm bushing press-fit positioning pin 11 and the longitudinal arm bushing press-fit floating centering sleeve 12 are fixed on the floating centering sleeve 12 with an interference fit to position the bushing; the longitudinal arm bushing press-fit positioning plate 13 and the longitudinal arm bushing press-fit positioning seat 14 are bolted together and have a limiting fit with the longitudinal arm bushing press-fit floating centering sleeve 12 to prevent it from falling off. The longitudinal arm bushing press-fit anti-misalignment block 17 is installed on the plane side of the longitudinal arm bushing press-fit positioning seat 14, contacts and limits the fit, and is bolted to the base plate 7. Its function is to determine the direction of the longitudinal arm bushing support seat and ensure the longitudinal arm bushing angle.

[0032] The specific operation process of this utility model is as follows:

[0033] Install the rear trailing arm bushing pressing mechanism and the support positioning mechanism on the hydraulic head and base of the press, respectively. Place the trailing arm welding assembly 1 and the rear trailing arm bushing assembly 2 into the press, respectively. Adjust and tighten the bushing pressing mechanism according to the bushing position. Adjust and tighten the rear trailing arm positioning mechanism according to the rear trailing arm position. Place the rear trailing arm body into the positioning seat, and place the bushing into the bushing floating centering sleeve. Align the bushing positioning pin. Press the press start button with both hands to move the bushing pressing mechanism down and press the rear trailing arm bushing into the rear trailing arm welding assembly. Press the press reset button to reset the bushing pressing mechanism. Remove the rear trailing arm assembly for dimensional inspection. Adjust the height of the pressing limit post according to the inspection results to ensure the bushing pressing depth. Replace the rear trailing arm welding assembly and bushing, and repeat the above steps to press the bushing. After the left part of the rear trailing arm assembly is pressed, place the right part of the rear trailing arm assembly into the rear trailing arm positioning mechanism. Repeat the above process to complete the pressing of the right part of the lower swing arm assembly.

Claims

1. A pressing device for automotive rear trailing arm bushings, characterized in that: The device comprises a pressing mechanism (3) and a supporting and positioning mechanism; The pressing mechanism (3) comprises a bushing pressing upper connecting plate (4) and a bushing pressing head (5), which are in sliding fit and fixed by bolts; The supporting and positioning mechanism comprises a bottom plate (7), on which a rear trailing arm welding assembly positioning unit (6), a trailing arm pressing supporting pin (8) and a trailing arm assembly limiting pin (9) are arranged; The rear trailing arm welding assembly positioning unit (6) comprises a longitudinal bushing pressing positioning seat (14), on which a trailing arm bushing pressing positioning disc (13) is arranged, and in the longitudinal bushing pressing positioning seat (14), a trailing arm bushing pressing floating centering sleeve (12) is movably arranged, below the trailing arm bushing pressing floating centering sleeve (12), a guide spring (15) is arranged, and above the trailing arm bushing pressing floating centering sleeve (12), a trailing arm bushing pressing positioning pin (11) is arranged.

2. The automobile trailing arm bushing press-fitting device according to claim 1, characterized in that: The device further comprises a trailing arm bushing pressing mistake-proofing block (17), which is fixed on the bottom plate (7) by bolts and is in plane limiting fit with the longitudinal bushing pressing positioning seat (14).

3. The automobile trailing arm bushing press-fitting device according to claim 1, characterized in that: The trailing arm pressing supporting pin (8) and the trailing arm assembly limiting pin (9) are arranged on the bottom plate (7) in threaded fit, and on the trailing arm assembly limiting pin (9), a polyurethane pad (10) is arranged.

Images