A swing arm bushing rubber and frame pull-off test tool

Abstract

The present invention relates to the field of automobile parts test fixtures, and specifically to a swing arm bushing rubber and frame pull-off test fixture, comprising a tensile testing machine, a bushing inner positioning seat, a bushing outer positioning seat and a pull rod, wherein the tensile testing machine is provided with a lower clamping mechanism for fixing the bushing outer positioning seat and an upper clamping mechanism for fixing the pull rod, the outer frame is fixed in the bushing outer positioning seat, the pull rod is connected with the inner frame, and the pull rod is driven to separate the inner frame from the outer frame by moving the upper clamping mechanism upward. In the present invention, since the separation process is realized in the bushing outer positioning seat, the bushing pop-out problem will not occur.

Description

Technical Field

[0001] The invention relates to the field of automobile parts experimental tooling, and in particular to a swing arm bushing rubber and frame pull-off test tooling. Background Art

[0002] The automobile swing arm bushing is one of the main components of the automobile chassis, and the manufacturing quality of the swing arm bushing directly affects the overall quality of the automobile. For example, bushing debonding will affect the user's comfort, abnormal noise, and even safety performance. Generally, there are two bushings in the front swing arm of an automobile, namely the front bushing and the rear bushing. Usually, the rear bushing is an inner and outer steel frame structure, and the inner and outer frame connection of bushing B is a bushing assembly formed after rubber vulcanization. Because the inner and outer frame connection of the bushing relies on rubber connection, the rubber adhesion rate of the rubber and the metal surface of the frame must meet the requirements of the drawing to ensure driving safety and service life. For example, a certain OEM requires that the rubber adhesion rate area of ​​the swing arm bushing rubber and the metal frame is ≥80%. In order to verify whether the bushing rubber adhesion rate is qualified, the bushing must be tested for rubber adhesion rate.

[0003] At present, most domestic bushing manufacturers use simple tooling for testing. Figure 1 As shown: It is composed of a support seat C and a pull rod A. The support seat fixes the outer frame, and the pressure rod connects the inner frame. The inner and outer frames are separated by pressing the pressure rod downward. Although this method has a simple structure, the bushing is easily ejected due to uneven force during the bushing pressing process. First, it affects safety; second, the test process is unstable; third, the test results are unreliable. Fourth, the tester's skills are relatively high. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a swing arm bushing rubber and frame pull-off test tool, which has.

[0005] The objective of the present invention is accomplished through the following technical solutions: This swing arm bushing rubber and skeleton pull-off test tool comprises a tensile testing machine, a bushing inner positioning seat, a bushing outer positioning seat and a pull rod, the tensile testing machine is provided with a lower clamping mechanism for fixing the bushing outer positioning seat and an upper clamping mechanism for fixing the pull rod, the outer skeleton is fixed in the bushing outer positioning seat, the pull rod is connected with the inner skeleton, and the pull rod is driven upward by the upper clamping mechanism to separate the inner skeleton from the outer skeleton; a replaceable bushing inner positioning seat is provided in the bushing outer positioning seat, and the bushing inner positioning seat is provided with different specifications, and the test can be switched according to bushings of different specifications.

[0006] Furthermore, an observation hole is provided on the outer positioning seat of the bushing for observing the degumming process at a close distance, and the safety performance is high.

[0007] Furthermore, the outer locating seat of the bushing is cylindrical, and the inner diameter of its lower part is smaller than that of the upper part. A step surface is formed inside the outer locating seat of the bushing. The outer diameter of the inner locating seat of the bushing matches the inner diameter of the lower part. A locking screw is provided on the outside of the outer locating seat of the bushing to tighten the inner locating seat of the bushing to prevent it from falling off from the bottom after installation. The inner locating seat of the bushing and the step surface form a limiting fit to prevent the inner locating seat of the bushing from being pulled out from the top by the pull rod.

[0008] Furthermore, the inner positioning seat of the bushing is cylindrical, and the inner diameter of the lower part is smaller than the inner diameter of the upper part. A second step surface is formed inside the inner positioning seat of the bushing, and the outer frame and the second step surface form a limiting fit, which serves to prevent the outer frame from being pulled out from above by the pull rod.

[0009] Furthermore, a rod head is provided at the bottom of the pull rod, and the pull rod penetrates into the inner frame from bottom to top, and the rod head serves as a force point of the inner frame.

[0010] Furthermore, a T-shaped connecting block is provided at the bottom of the outer positioning seat of the bushing, and a T-shaped slot matching the T-shaped connecting block is provided at the bottom of the outer positioning seat of the bushing, so that a quick connection with the lower clamping mechanism is achieved through the T-shaped connecting block.

[0011] Furthermore, outer tooth surfaces are provided on the outer surfaces of the upper end of the pull rod and the lower end of the T-shaped connecting block.

[0012] The beneficial effects of the present invention are:

[0013] 1. Provide a pull-off tool for the adhesion rate test of the swing arm bushing rubber with relatively high safety performance, stable process and good result reliability;

[0014] 2. By replacing the positioning seat inside the bushing, bushing switching tests of various specifications can be realized;

[0015] 3. The degumming process can be observed at close range, with high safety performance;

[0016] 4. The bushing switching speed is fast, which improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the prior art test tooling;

[0018] Figure 2 It is a schematic diagram of the structure of the present invention;

[0019] Figure 3 It is a schematic cross-sectional view of the tooling structure of the present invention;

[0020] Figure 4 It is a three-dimensional schematic diagram of the tooling structure of the present invention;

[0021] Explanation of the accompanying drawings: tensile testing machine 1, lower clamping mechanism 1-1, upper clamping mechanism 1-2, bushing outer positioning seat 2, observation hole 2-1, step surface one 2-2, set screw 2-3, pull rod 3, rod head 3-1, outer skeleton 4, inner skeleton 5, bushing inner positioning seat 6, step surface two 6-1, T-shaped connecting block 7, pull rod A, bushing B, support seat C. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings:

[0023] Example: Figure 2-Figure 4 As shown, the swing arm bushing rubber and skeleton pull-off test tool mainly includes a tensile tester 1, a bushing outer positioning seat 2 and a pull rod 3. The tensile tester 1 is provided with a lower clamping mechanism 1-1 for fixing the bushing outer positioning seat 2 and an upper clamping mechanism 1-2 for fixing the pull rod 3. The outer skeleton 4 is fixed in the bushing outer positioning seat 2, and the pull rod 3 is connected with the inner skeleton 5. The pull rod 3 is driven to separate the inner skeleton 5 from the outer skeleton 4 by moving the upper clamping mechanism 1-2 upward. The separation process is realized in the bushing outer positioning seat 2, so there will be no problem of bushing popping out.

[0024] An observation hole 2-1 is provided on the outer positioning seat 2 of the bushing for observing the degumming process at a close distance, with high safety performance.

[0025] A replaceable inner bushing locating seat 6 is provided inside the bushing outer locating seat 2. The inner bushing locating seat 6 is provided with different specifications, and can be switched according to bushings of different specifications. The outer bushing locating seat 2 is cylindrical, and the inner diameter of the lower half is smaller than the inner diameter of the upper half. A step surface 2-2 is formed inside the outer bushing locating seat 2. The outer diameter of the inner bushing locating seat 6 matches the inner diameter of the lower half. A set screw 2-3 is provided outside the outer bushing locating seat 2 to tighten the inner bushing locating seat 6 to prevent it from falling off from the bottom after installation. The inner bushing locating seat 6 and the step surface 2-2 form a limit fit to prevent the inner bushing locating seat 6 from being pulled out from the top by the pull rod 3.

[0026] The inner positioning seat 6 of the bushing is cylindrical, and the inner diameter of the lower part is smaller than that of the upper part. A step surface 6-1 is formed inside the inner positioning seat 6 of the bushing. The outer frame 4 and the step surface 6-1 constitute a limiting fit, which prevents the outer frame 4 from being pulled out from above by the pull rod 3.

[0027] A rod head 3 - 1 is provided at the bottom of the pull rod 3 , and the pull rod 3 penetrates into the inner frame 5 from bottom to top, and the rod head 3 - 1 serves as a force point of the inner frame 5 .

[0028] A T-shaped connecting block 7 is provided at the bottom of the bushing outer positioning seat 2. A T-shaped slot matching the T-shaped connecting block 7 is provided at the bottom of the bushing outer positioning seat 2. The T-shaped connecting block 7 is used to achieve quick connection with the lower clamping mechanism 1-1.

[0029] The upper end of the pull rod 3 and the outer surface of the lower end of the T-shaped connecting block 7 are provided with external toothed surfaces to cooperate with the clamping, so as to make the clamping more stable.

[0030] Working process of the present invention:

[0031] 1. The inner locating seat 6 of the bushing is connected to the bushing, and the inner locating seat 6 of the bushing penetrates into the inner cavity of the outer locating seat 2 of the bushing;

[0032] 2. The end surface of the inner locating seat 6 of the bushing should be in contact with the inner cavity of the outer locating seat 2 of the bushing. Screw the set screws 2-3 into the threaded holes of the outer locating seat 2 of the bushing and tighten the two set screws 2-3 to completely fix the inner locating seat 6 of the bushing on the outer locating seat 2 of the bushing.

[0033] 3. Insert the pull rod 3 into the inner frame 5 of the bushing, and then connect the T-shaped connecting block 7 to the outer positioning seat 2 of the bushing;

[0034] 4. After the assembly is completed, the bushing to be tested has been assembled with the tooling;

[0035] 5. Connect the pull rod 3 to the upper clamping mechanism 1-2 of the tensile testing machine 1, and clamp the pull rod 3;

[0036] 6. Connect the T-type connection with the lower clamping mechanism 1-1 of the tensile testing machine 1, and clamp the T-type connection block 7. After the above operations are completed, the tooling and the tensile machine equipment have been fully connected, and the pull-off test step is ready to start;

[0037] 7. Start the equipment button of the tensile testing machine 1, and the upper clamping mechanism 1-2 and the lower clamping mechanism 1-1 of the tensile testing machine 1 move in the opposite direction of the guide column, and the test starts;

[0038] 8. The upper clamping mechanism 1-2 moves upward and starts stretching. When the equipment is being stretched, the working condition of the bushing stretching can be checked through the observation hole 2-1 of the bushing outer positioning seat 2 to check whether the stretching process is normal. When the inner frame 5 and the outer frame 4 of the bushing are completely pulled apart, there will be a certain impact at the moment, and the bushing outer positioning seat 2 can start the safety protection function;

[0039] 9. After the test is completed, the inner and outer frames 4 of the bushing can be taken out, and the test is completed;

[0040] 10. The next step is to confirm and analyze the debonding rate of the bushing.

[0041] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the protection scope of the claims attached to the present invention.

Claims

1. A swing arm bushing rubber and frame pull-off test tool, comprising a tensile testing machine (1), characterized in that: It mainly comprises a bushing outer positioning seat (2), a bushing inner positioning seat (6) and a pull rod (3). The tensile testing machine (1) is provided with a lower clamping mechanism (1-1) for fixing the bushing outer positioning seat (2) and an upper clamping mechanism (1-2) for fixing the pull rod (3). The outer frame (4) is fixed in the bushing outer positioning seat (2). The pull rod (3) is connected with the inner frame (5). The pull rod (3) is driven upward by the upper clamping mechanism (1-2) to separate the inner frame (5) from the outer frame (4). A replaceable bushing inner positioning seat (6) is provided in the bushing outer positioning seat (2). The bushing is fixed in the bushing inner positioning seat (6). The bushing inner positioning seat (6) is provided with different specifications, and the test can be switched according to bushings of different specifications.

2. The swing arm bushing rubber and frame pull-off test tool according to claim 1, characterized in that: An observation hole (2-1) is provided on the bushing outer positioning seat (2).

3. The swing arm bushing rubber and frame pull-off test tool according to claim 1, characterized in that: The outer locating seat (2) of the bushing is cylindrical, and the inner diameter of the lower part is smaller than that of the upper part. A step surface (2-2) is formed inside the outer locating seat (2). The outer diameter of the inner locating seat (6) of the bushing matches the inner diameter of the lower part. A set screw (2-3) is provided outside the outer locating seat (2) of the bushing to tighten and fix the inner locating seat (6). The inner locating seat (6) of the bushing and the step surface (2-2) form a limiting fit to prevent the inner locating seat (6) of the bushing from being pulled out from above by the pull rod (3).

4. The swing arm bushing rubber and frame pull-off test tool according to claim 1, characterized in that: The bushing inner positioning seat (6) is cylindrical, and the inner diameter of the lower part is smaller than the inner diameter of the upper part. A second step surface (6-1) is formed inside the bushing inner positioning seat (6). The outer frame (4) and the second step surface (6-1) form a limiting fit to prevent the outer frame (4) from being pulled out from above by the pull rod (3).

5. The swing arm bushing rubber and frame pull-off test tool according to claim 1, characterized in that: A rod head (3-1) is provided at the bottom of the pull rod (3), and the pull rod (3) penetrates the inner frame (5) from bottom to top, and the rod head (3-1) serves as a force bearing point of the inner frame (5).

6. The swing arm bushing rubber and frame pull-off test tool according to claim 1, characterized in that: A T-shaped connection block (7) is provided at the bottom of the bushing outer positioning seat (2), and a T-shaped groove matching the T-shaped connection block (7) is provided at the bottom of the bushing outer positioning seat (2), so that a quick connection with the lower clamping mechanism (1-1) is achieved through the T-shaped connection block (7).

7. The swing arm bushing rubber and frame pull-off test tool according to claim 6, characterized in that: External tooth surfaces are provided on the outer surfaces of the upper end of the pull rod (3) and the lower end of the T-shaped connecting block (7) for cooperating with the upper and lower clamping mechanisms (1-2, 1-1).

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