Clamp device for bending fatigue test of step pin shaft

Abstract

The utility model relates to the technical field of chain assembly detection, in particular to a clamp device for a bending fatigue test of a step pin shaft. According to the technical scheme, the base comprises a base body structure, a first connecting supporting seat is arranged at the position, close to the middle of the length direction, of the upper end of the base body structure, and a second combined supporting frame is arranged at the position, close to the right side, of the base body structure; the second combined supporting frame is inserted from the lower end of the base main body structure and penetrates out of the upper end of the base main body structure, and the first connecting supporting seat and the second combined supporting frame are provided with a to-be-detected step pin shaft main body structure through combined holes. The utility model has the advantages that the main body is stably matched during the test through the limiting sleeve and the compression bolt, and the tail end position is matched with the pressure during the bending fatigue test through the pressure head seat, so that the position stability of the step pin shaft to be detected in the test process is better, and the test detection precision is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of chain component detection, in particular to a step pin bending fatigue test fixture device. Background Art

[0002] The stepped pin is an important component structure in chain products. Its durability during use determines the overall durability and safety of the chain. Existing stepped pin products cannot be directly subjected to bending fatigue tests during the production process. When assembled on the chain, the detection accuracy will also be affected by the influence of other components, and it is also difficult to clamp the chain. The existing fixture is unable to clamp the stepped pin stably and accurately, resulting in the inability to guarantee stability during the detection test. Utility Model Content

[0003] The purpose of the utility model is to provide a step pin bending fatigue test fixture device, which can be directly clamped and matched with the main body of the step pin when in use, and the main body can be stably matched during the test through the limit sleeve and the clamping bolt, and the tail end position is pressurized and matched during the bending fatigue test through the pressure head seat, which can ensure that the position stability of the step pin to be tested during the test is better, the test detection accuracy is higher, and the stability during clamping is better. The overall volume of this device is smaller, and multiple devices can be fixed on the workbench for use when in use, which can effectively improve the efficiency of the test match, and the overall cost of conducting the detection test is lower, and there is no need to use complex components for combination.

[0004] The technical solution of the utility model is as follows:

[0005] A step pin bending fatigue test fixture device is characterized in that: it includes a base main structure, a first connecting support seat is provided at the upper end of the base main structure near the middle position in the length direction, a second combined support frame is provided at the right side of the base main structure, the second combined support frame is inserted from the lower end of the base main structure and passes through the upper end of the base main structure, the first connecting support seat and the second combined support frame are installed with the step pin main structure to be tested through a combination hole, a convenient combined support cover plate is provided at the upper end of the first connecting support seat and the position where the step pin main structure to be tested is matched, the upper end of the second combined support frame is provided with a tightening bolt that cooperates with the step pin main structure to be tested, a safety limit sleeve is sleeved on the outer side of the step pin main structure to be tested, the left side of the safety limit sleeve is affixed to the right end surface of the second combined support frame, the right side of the safety limit sleeve is limited by a limit pin inserted into the step pin main structure to be tested, the left upper end position of the step pin main structure to be tested is pressed and fitted by a pressure head body installed on a pressure head seat, and the pressure head seat is matched with a press.

[0006] Furthermore, the lower end surface of the base main structure and the lower end surface of the second combined support frame are on the same plane.

[0007] Furthermore, the first connecting support seat and the second combined support frame are both connected to the base main structure through bolts.

[0008] Furthermore, the first connecting support seat and the second combined support frame are located in the middle position of the width direction of the base main structure.

[0009] Furthermore, the lower end of the pressure head body and the main structure of the step pin to be detected are matched in a circular arc-shaped matching connection groove.

[0010] Beneficial effects of the utility model:

[0011] The utility model can be directly clamped and matched with the main body of the step pin shaft when in use, and can stably match the main body during the test through the limit sleeve and the clamping bolt, and the tail end position is pressurized and matched during the bending fatigue test through the pressure head seat, which can ensure that the position stability of the step pin shaft to be tested during the test is better, the test detection accuracy is higher, and the stability during clamping is better. The overall volume of this device is smaller, and multiple devices can be fixed on the workbench for use when in use, which can effectively improve the efficiency of the test cooperation, and the overall cost of conducting the detection test is lower, and there is no need to use complex components for combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1This is a front half-section schematic diagram of the present utility model;

[0013] Figure 2 It is a side schematic diagram of the utility model;

[0014] Figure 3 It is a top view schematic diagram of the utility model;

[0015] Figure 4 It is a cross-sectional schematic diagram of the AA position of the present invention;

[0016] Figure 5 It is a cross-sectional schematic diagram of the BB position of the utility model;

[0017] In the figure: 1. Base main structure, 2. First connecting support seat, 3. Second combined support frame, 4. Clamping bolt, 5. Safety limit sleeve, 6. Limiting pin, 7. Pressure head seat, 8. Pressure head body. DETAILED DESCRIPTION

[0018] like Figures 1 to 5A fixture for testing a stepped pin bending fatigue is shown. The fixture comprises a base structure 1. A first connecting support seat 2 is provided at the upper end of the base structure 1, near the middle of its longitudinal direction. A second assembly support frame 3 is provided to the right of the base structure 1. The second assembly support frame 3 is inserted from the lower end of the base structure 1 and extends from the upper end of the base structure 1, capable of retaining the stepped pin body under test. The first connecting support seat 2 and the second assembly support frame 3 are mounted with the stepped pin body under test via assembly holes. A convenient assembly support cover is provided at the upper end of the first connecting support seat 2, where it engages with the stepped pin body under test, making assembly operation more convenient and placement more efficient. A clamping bolt 4 is provided at the upper end of the second assembly support frame 3, which engages with the stepped pin body under test and provides a compression fit, ensuring greater positional stability during testing. A safety stopper 5 is fitted onto the outer side of the stepped pin body under test, providing a positional fit with the right side structure. This ensures greater positional stability during testing. The left side of the safety limit sleeve 5 is fitted with the right end face of the second combined support frame 3, and the right side of the safety limit sleeve 5 is limited by the limit pin 6 inserted into the main structure of the step pin to be tested. The upper left end position of the main structure of the step pin to be tested is pressed and fitted by the pressure head body 8 installed on the pressure head seat 7. The pressure head seat 7 is combined with the press to realize the stress of the mold pin during the test, making the test data more accurate. When in use, it can directly clamp and fit with the main body of the step pin, and the limit sleeve and the clamping bolt are used to ensure the main body is stably fitted during the test, while the tail end is pressed and fitted by the pressure head seat during the bending fatigue test, which can ensure better position stability of the step pin to be tested during the test, higher test accuracy, and better stability during clamping. The overall volume of this device is smaller, and multiple devices can be fixed on a workbench for use, which can effectively improve the efficiency of test fitting, reduce the overall cost of testing, and do not require the use of complex components for combination.

[0019] Preferably, the lower end surface of the base main structure 1 and the lower end surface of the second combined support frame 3 are on the same plane, so that the flatness of the lower end position is better and the matching stability of the installation position is more reliable.

[0020] Preferably, the first connecting support seat 2 and the second combined support frame 3 are connected to the base main structure 1 by bolts, which makes the tightening operation more convenient and the production cost lower. In addition, a positioning installation structure can be provided on the first connecting support seat 2 and the second combined support frame 3 as needed, which can improve the combination accuracy and convenience during installation.

[0021] Preferably, the first connecting support seat 2 and the second combined support frame 3 are located in the middle position in the width direction of the base main structure 1, which has better combined stability when matched, stronger bearing capacity during use, and higher safety during use.

[0022] Preferably, the lower end of the pressure head body 8 and the main structure of the step pin shaft to be tested are matched in an arc-shaped matching connection groove, which has a larger area when matching with the step pin shaft to be tested, better matching stability, and higher matching safety during the test.

[0023] The above is a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements or substitutions without departing from the principles of the present invention, and such improvements or substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A fixture for a step pin bending fatigue test, characterized by: The invention comprises a base main structure (1), wherein a first connecting support seat (2) is provided at the middle position of the upper end of the base main structure (1) near the longitudinal direction, and a second combined support frame (3) is provided at the right side of the base main structure (1), and the second combined support frame (3) is inserted from the lower end of the base main structure (1) and passes through the upper end of the base main structure (1), and the first connecting support seat (2) and the second combined support frame (3) are installed with a step pin shaft main structure to be detected through a combined hole, and a convenient combined support cover plate is provided at the upper end of the first connecting support seat (2) and the position where the step pin shaft main structure to be detected is matched. The upper end of the second combined support frame (3) is provided with a clamping bolt (4) that cooperates with the main structure of the step pin shaft to be detected, and a safety limit sleeve (5) is sleeved on the outer side of the main structure of the step pin shaft to be detected. The left side of the safety limit sleeve (5) is fitted with the right end face of the second combined support frame (3), and the right side of the safety limit sleeve (5) is limited by a limit pin (6) inserted into the main structure of the step pin shaft to be detected. The upper left end position of the main structure of the step pin shaft to be detected is pressed and fitted by a pressure head body (8) installed on a pressure head seat (7), and the pressure head seat (7) is fitted with a press.

2. The step pin bending fatigue test fixture according to claim 1, characterized in that: The lower end surface of the base main structure (1) and the lower end surface of the second combined support frame (3) are on the same plane.

3. The step pin bending fatigue test fixture according to claim 1, characterized in that: The first connecting support seat (2) and the second combined support frame (3) are both connected to the base main structure (1) via bolts.

4. The step pin bending fatigue test fixture according to claim 1, characterized in that: The first connection support seat (2) and the second combined support frame (3) are located at the middle position of the base main structure (1) in the width direction.

5. The step pin bending fatigue test fixture according to claim 1, characterized in that: The lower end of the pressure head body (8) and the main structure of the step pin to be detected are matched at a position forming an arc-shaped matching connection groove.

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