Automobile rear lower swing arm bushing press-fitting device

Abstract

The utility model provides an automobile rear lower swing arm lining press fitting device which is characterized by comprising an upper connecting plate and a bottom plate which are matched with a press machine hydraulic head and a press machine base respectively, and a swing arm positioning mechanism and a swing arm angle limiting mechanism are arranged on the bottom plate. A pressure head matched with the bushing is arranged below the upper connecting plate; and the lower surface of the upper connecting plate is matched with a press-fitting limiting column arranged on the bottom plate. The bushing press-fitting device is reasonable in structural design, small in occupied area and high in universality, and bushing press-fitting can be completed by means of an existing common press. The processing and manufacturing period of the bushing press-fitting device is shortened, meanwhile, the product quality is guaranteed, the device can quickly adapt to product design structure changes, the sample piece delivery period is met, one set of device is compatible with press-fitting of left and right front lower swing arm bushings, the manufacturing cost is saved, and the competitiveness of products in the market is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts processing and manufacturing, and specifically relates to a press-fitting device for a bushing of a rear lower swing arm of an automobile. Background Art

[0002] The lower arm is commonly known as the lower suspension. Its main function is to support the vehicle body, shock absorber and buffer the vibration during driving. The shock absorber can play a good auxiliary role in the lower suspension; the lower arm of the car is the guide and support of the suspension. Its deformation affects the wheel positioning and reduces the driving stability. The automobile bushing has good vibration isolation, good elasticity and attenuation characteristics, and has become an indispensable and important component in the car. It is usually used in the automobile suspension mechanism. Reasonable design of the structural characteristics of the automobile bushing can ensure that the whole vehicle has good operating stability and smoothness. The bushing of the lower arm of the car is required to be able to withstand tension, pressure, torsion and deflection during the driving process of the vehicle.

[0003] After the design is completed, the vehicle manufacturer needs to carry out multiple rounds of assembly and test verification. For the verification of the performance parameters of components such as chassis and engine, the customers of newly designed and developed models will require chassis suppliers to provide samples for trial assembly in multiple rounds. Due to the uncertainty of the verification results, it is necessary to follow the customer's verification to modify the structural design of the rear lower arm or bushing. At present, most of the rubber bushing press-fitting in mass production is completed by special press-fitting equipment, which is efficient and has good dimensional consistency, but has a long cycle and relatively large investment. It is highly specialized, but not suitable for changes in product structure. If special press-fitting equipment is designed and developed during the test stage, it may face modification or even scrapping if the design is modified during customer verification. The risk is relatively high, the investment cost is high, and the cycle cannot meet the requirements for sample submission of the OEM. Utility Model Content

[0004] The utility model aims to provide a press-fit device for a rear lower swing arm bushing of an automobile to solve the problems in the prior art.

[0005] The utility model is realized through the following technical scheme: a press-fitting device for the bushing of the rear lower swing arm of an automobile, characterized in that: it includes an upper connecting plate and a bottom plate which respectively cooperate with the hydraulic head of a press and the base of a press, a swing arm positioning mechanism and a swing arm angle limiting mechanism are arranged on the bottom plate; a pressing head which cooperates with the bushing is arranged below the upper connecting plate; and the lower surface of the upper connecting plate cooperates with a press-fitting limiting column arranged on the bottom plate.

[0006] Further: the swing arm positioning mechanism includes a swing arm positioning seat, a bushing support seat slidingly matched with the swing arm positioning seat, and a bushing guide column and a bushing anti-rotation pin are arranged on the bushing support seat; a guide spring is arranged between the bushing support seat and the positioning seat.

[0007] Furthermore: it also includes a bushing guide seat limit pin; the lower end of the bushing guide seat limit pin is interference fit with the base plate, and the main body is matched with the guide hole or guide groove on the bushing support seat.

[0008] Further: the swing arm angle limiting mechanism includes a swing arm limiting pin, and the swing arm limiting pin is fixed to the base plate through a support arm.

[0009] Furthermore: the bushing guide column and the bushing anti-rotation pin are respectively interference fit with the bushing support seat.

[0010] Furthermore: the upper connecting plate and the bottom plate are connected to the press machine through bolts respectively, and the upper connecting plate and the bottom plate are respectively provided with transverse opening grooves and longitudinal opening grooves matching with the bolts.

[0011] The beneficial effects of the structure of the utility model are as follows: since the utility model adopts a bushing press mechanism composed of an upper connecting plate and an upper pressure head, the upper connecting plate is provided with 4 groups of open grooves for connecting the hydraulic head of the press (not shown in the standard press drawing), the upper pressure head is screwed in the middle position of the upper connecting plate, the rear lower swing arm positioning mechanism is an integral structure, which can realize the left and right parts of the rear lower swing arm assembly, the rear lower swing arm angle limiting mechanism is fixed to the bottom plate by connecting bolts, and the outer side of the connecting seat is screwed with an adjustment pin mounting seat for installing the adjustment pin. Its structural design is reasonable, the device occupies a small area, and has strong versatility. The bushing press can be completed by borrowing an existing ordinary press. The processing and manufacturing cycle of the bushing press device is shortened while ensuring product quality, and it can quickly adapt to changes in product design structure and meet the sample delivery cycle. Due to the symmetry of the left and right front lower swing arms, a set of this device is compatible with the press-fitting of the left and right front lower swing arm bushings, saving manufacturing costs and improving the competitiveness of the product in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 is a schematic diagram of the utility model in use;

[0014] FIG2 is a schematic diagram of the coordination structure of the lower swing arm and the bushing;

[0015] Figure 3 is a schematic diagram of the overall structure of the utility model;

[0016] FIG4 is a schematic diagram of the structure of the swing arm press-fitting mechanism;

[0017] FIG5 is a schematic diagram of the structure of the swing arm positioning mechanism;

[0018] Figure 6 It is a structural diagram of the swing arm limiting mechanism.

[0019] Explanation of the serial numbers in the figure: 1 rear lower swing arm welding assembly, 2 swing arm bushing assembly, 5 press-fit limit column, 6 swing arm positioning mechanism, 7 bottom plate, 8 swing arm angle limit mechanism, 9 upper connecting plate, 10 pressure head, 11 bushing guide column, 12 bushing anti-rotation pin, 13 bushing support seat, 14 swing arm positioning seat, 15 bushing guide seat limit pin, 16 guide spring, 17 swing arm limit pin, 18 swing arm support arm. DETAILED DESCRIPTION

[0020] according to Figures 1 to 6 The specific structure of the utility model is described in detail. A vehicle rear lower swing arm bushing press-fit device is used to press-fit the swing arm bushing assembly 2 (referred to as bushing) into the rear lower swing arm welding assembly 1 (referred to as swing arm), which includes an upper connecting plate 9 matched with the hydraulic head of the press and a bottom plate 7 matched with the base of the press, and a swing arm positioning mechanism 6 and a swing arm angle limiting mechanism 8 are arranged on the bottom plate 7; the swing arm positioning mechanism 6 matches with the swing arm bushing mounting hole, and the swing arm angle limiting mechanism 8 matches with the swing arm process hole. A pressing head 10 matched with the bushing is fixedly installed below the upper connecting plate 9 by bolts; the lower surface of the upper connecting plate 9 matches with the top limit of the press-fitting limit column 5 arranged on the bottom plate 7.

[0021] Preferably: the swing arm positioning mechanism 6 includes a swing arm positioning seat 14, a bushing support seat 13 slidingly matched with the swing arm positioning seat 14, a bushing guide column 11 and a bushing anti-rotation pin 12 are provided on the bushing support seat 13, the bushing guide column 11 and the bushing center hole are matched, and the bushing anti-rotation pin 12 is matched with the bushing side hole; a guide spring 16 is provided between the bushing support seat 13 and the swing arm positioning seat 14, the lower part of the guide spring 16 is matched with the bottom plate, and the upper part is matched with the bushing support seat 13, and specifically can be fixed on the side wall or top partition of the bushing support seat 13.

[0022] Preferably, the bushing guide seat limit pin 15 is also included; the lower end of the bushing guide seat limit pin 15 is interference fit with the bottom plate 7, and the main body is matched with the guide hole or guide groove on the bushing support seat 13. Further, the bushing guide seat limit pin 15 is matched with the bushing support seat 13 and the swing arm positioning seat 14 at the same time, and the bushing guide seat limit pin 15 is equivalent to a guide key structure, which plays a role in guiding and preventing rotation.

[0023] Preferably, the swing arm angle limiting mechanism 8 includes a swing arm limiting pin 17 , and the swing arm limiting pin 17 is fixed on the base plate 7 through a swing arm supporting arm 18 .

[0024] Preferably, the bushing guide column 11 and the bushing anti-rotation pin 12 are respectively interference fit with the bushing support seat 13 .

[0025] Preferably, the upper connecting plate 9 and the bottom plate 7 are connected to the press machine by bolts, and a transverse opening groove and a longitudinal opening groove matching with the bolts are respectively provided on the upper connecting plate 9 and the bottom plate 7. The transverse and longitudinal opening grooves enable the upper connecting plate 9 and the bottom plate 7 to be adjustable in both the X-axis and Y-axis directions, thereby improving the accuracy of the position.

[0026] The present invention is further described below through specific embodiments. Example

[0027] A vehicle rear lower swing arm bushing press-fitting device comprises a bushing press-fitting mechanism, a rear lower swing arm positioning mechanism and a rear lower swing arm angle limiting mechanism, wherein the bushing press-fitting mechanism is composed of an upper connecting plate and an upper pressing head, wherein the upper connecting plate is provided with four groups of opening grooves for connecting a hydraulic head of a press (a standard press, not shown in the figure), wherein the upper pressing head is screwed to the middle position of the upper connecting plate, and the bushing press-fitting mechanism can adjust the position of the upper pressing head through the opening groove on the upper connecting plate to meet the coaxiality with the bushing;

[0028] The rear lower swing arm positioning mechanism can place the left and right parts of the rear lower swing arm assembly, and the upper end is provided with a press-fitting limit column for limiting the stroke of the bushing press-fitting mechanism, and the press-fitting limit column is installed on the bottom plate with an interference fit;

[0029] The lower swing arm angle limiting mechanism is connected to the bottom plate by bolts. The lower swing arm angle limiting mechanism includes a swing arm limiting pin and a swing arm support arm. The swing arm support arm is fixed to the bottom plate by bolts. The swing arm limiting pin 17 is connected to the swing arm support arm 18 by interference fit. The angle requirements of the lower swing arm assembly are met by adjustment, thereby ensuring the press-fit dimensions of the bushing and the lower swing arm.

[0030] The specific operation process of this embodiment is as follows:

[0031] Install the lower swing arm bushing pressing mechanism and the lower swing arm positioning mechanism on the hydraulic head and the press base respectively, put in the rear lower swing arm welding assembly and bushing, adjust the bushing pressing mechanism according to the position of the bushing and tighten it, adjust the rear lower swing arm positioning mechanism according to the position of the rear lower swing arm body and tighten it, put the rear lower swing arm body into the positioning seat, put the bushing into the bushing guide column, align the bushing anti-rotation pin, press the press start button with both hands to move the bushing pressing mechanism downward and press the swing arm bushing into the rear lower swing arm welding assembly until the bushing pressing mechanism contacts the pressing limit column to stop pressing, press the press reset button to reset the bushing pressing mechanism, remove the rear lower swing arm assembly for size inspection, adjust the height of the pressing limit column according to the inspection result to ensure the pressing depth of the bushing, adjust the adjusting pin in the rear lower swing arm angle limit mechanism to meet the bushing angle requirement, put the rear lower swing arm welding assembly and bushing back in, and repeat the above steps to press the bushing. After the left part of the rear lower arm assembly is press-fitted, put the right part of the rear lower arm assembly into the rear lower arm positioning mechanism, and adjust the position of the bushing press-fitting mechanism and tighten it. Repeat the above process to complete the press-fitting of the right part of the rear lower arm assembly.

[0032] The upper connecting plate and the pressure head are connected by three bolts, the pressure head is provided with a contoured hole matched with the bushing, and the upper connecting plate is connected to the upper end of the press by a T-bolt. The bottom plate is provided with a press-fit limit column, a swing arm positioning mechanism, and a swing arm angle limit mechanism by means of interference fit or bolt connection.

[0033] The swing arm positioning seat is fixedly connected to the base plate by bolts; the swing arm bushing support seat is slidably matched with the swing arm positioning seat, and a lip is provided at the bottom of the bushing support seat to prevent it from slipping out. The guide spring is arranged below the swing arm bushing support seat, and plays a buffering role during the press-fitting process; the swing arm guide seat limit pin is fixed to the base plate by interference fit, determines the direction of the swing arm bushing support seat, and ensures the swing arm bushing angle. The bushing guide column and bushing anti-rotation pin are installed on the swing arm bushing support seat by interference fit.

[0034] The swing arm angle limiting mechanism includes a swing arm limiting pin and a swing arm support arm. The swing arm support arm is fixed to the bottom plate by bolt connection, and the support arm adopts a long hole form to facilitate position adjustment. The swing arm limiting pin is fixed to the swing arm support arm by interference fit, and the swing arm angle is adjusted by adjusting the fixed position of the swing arm support arm, thereby controlling the bushing press-fitting angle. This structure solves the press-fitting of the rear lower swing arm and the bushing, greatly saving the development cycle and development cost.

Claims

1. A press-fitting device for a rear lower arm bushing of an automobile, characterized in that: It comprises an upper connecting plate (9) and a bottom plate (7) respectively matched with a hydraulic head of a press machine and a base of the press machine, and a swing arm positioning mechanism (6) and a swing arm angle limiting mechanism (8) are arranged on the bottom plate (7); A pressure head (10) matched with the bushing is arranged below the upper connecting plate (9); and the lower surface of the upper connecting plate (9) matches with a press-fitted limiting column (5) arranged on the bottom plate (7).

2. The press-fitting device for the rear lower arm bushing of an automobile according to claim 1, characterized in that: The swing arm positioning mechanism (6) comprises a swing arm positioning seat (14), a bushing support seat (13) slidingly engaged with the swing arm positioning seat (14), a bushing guide column (11) and a bushing anti-rotation pin (12) being arranged on the bushing support seat (13); and a guide spring (16) being arranged between the bushing support seat (13) and the swing arm positioning seat (14).

3. The press-fitting device for the rear lower arm bushing of an automobile according to claim 2, characterized in that: It also includes a bushing guide seat limit pin (15); the lower end of the bushing guide seat limit pin (15) is interference fit with the bottom plate (7), and the main body is matched with the guide hole or guide groove on the bushing support seat (13).

4. The press-fitting device for the rear lower arm bushing of an automobile according to claim 1, characterized in that: The swing arm angle limiting mechanism (8) comprises a swing arm limiting pin (17), and the swing arm limiting pin (17) is fixed on the bottom plate (7) via a support arm (19).

5. The press-fitting device for the rear lower arm bushing of an automobile according to claim 1, characterized in that: The bushing guide column (11) and the bushing anti-rotation pin (12) are respectively interference-fitted with the bushing support seat (13).

6. The press-fitting device for the rear lower arm bushing of an automobile according to claim 1, characterized in that: The upper connecting plate (9) and the bottom plate (7) are connected to the press machine via bolts respectively, and the upper connecting plate (9) and the bottom plate (7) are respectively provided with a transverse opening groove and a longitudinal opening groove matching with the bolts.

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