Double-tooth loading test fixture for gear bending fatigue test

Abstract

The utility model relates to the field of gear bending fatigue tests, and discloses a double-tooth loading test fixture for gear bending fatigue tests, which comprises a U-shaped supporting seat, a fixture body is arranged on the upper surface of the U-shaped supporting seat, a fixing component is arranged in the U-shaped supporting seat, a positioning component is arranged in the fixture body, and the positioning component is arranged on the upper surface of the U-shaped supporting seat. The fixing assembly comprises a supporting shaft, the outer wall of the supporting shaft is sleeved with a first gasket, the outer wall of the supporting shaft is sleeved with a gear sample, the outer wall of the supporting shaft is sleeved with a second gasket, the front end of the outer wall of the supporting shaft is provided with a threaded groove, and the outer wall of the threaded groove is in threaded connection with a locking nut. According to the gear sample clamping and positioning device, through cooperation of the fixing assemblies, the gear sample can be supported, longitudinal deviation of the gear sample can be prevented, the gear sample can be clamped and positioned in the front-back direction, deviation of the gear sample can be effectively prevented, and the stability of the gear sample in the testing process is improved.

Description

Technical Field

[0001] This utility model relates to the field of gear bending fatigue testing, and in particular to a test fixture for double-tooth loading in gear bending fatigue testing. Background Technology

[0002] As a key component of mechanical transmission systems, the contact fatigue performance of gears is of great significance to the reliability and stability of the entire system. The bending fatigue performance of gears is a crucial indicator, and it is also an important verification and inspection item during the design and manufacturing process of gears.

[0003] Currently, most gear bending fatigue tests on the market mainly use single-tooth loading, which uses a loading head to apply dynamic pulsating load to the perpendicular line between the tooth surface and the common normal, until the gear fails and breaks.

[0004] Generally speaking, gear fixtures with single-tooth loading are relatively complex, difficult to operate, prone to uneven loading, and cannot repeatedly achieve the same loading point on the same gear.

[0005] To address this issue, a test fixture for dual-tooth loading in gear bending fatigue testing is proposed. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a test fixture for double-tooth loading in gear bending fatigue testing, which aims to improve the problems of existing single-tooth loading gear fixtures being complex, difficult to operate, prone to uneven loading, and unable to accurately repeat loading at the same point.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a test fixture for double-tooth loading in gear bending fatigue testing, comprising a U-shaped support base, a clamping body provided on the upper surface of the U-shaped support base, a fixing component provided inside the U-shaped support base, a positioning component provided inside the clamping body, the fixing component comprising a support shaft, a first gasket sleeved on the outer wall of the support shaft, a gear sample sleeved on the outer wall of the support shaft, a second gasket sleeved on the outer wall of the support shaft, a threaded groove provided at the front end of the outer wall of the support shaft, a locking nut threadedly connected to the outer wall of the threaded groove, and a fixing block threadedly connected to the upper surface of the U-shaped support base by a fixing bolt.

[0008] As a further description of the above technical solution:

[0009] The positioning component includes a pressure block, a transverse adjusting bolt is threaded through and connected to the right surface of the clamping body, a longitudinal adjusting bolt is threaded through and connected to the lower surface of the clamping body, and a placement groove is provided on the inner wall of the clamping body.

[0010] As a further description of the above technical solution:

[0011] The gear sample is located between shim one and shim two, with shim two located in front of shim one.

[0012] As a further description of the above technical solution:

[0013] The support shaft is inserted into the upper surface of the U-shaped support base.

[0014] As a further description of the above technical solution:

[0015] The fixing bolt passes through and is threaded onto the upper surface of the fixing block, and the fixing bolt passes through and is threaded onto the upper surface of the U-shaped support.

[0016] As a further description of the above technical solution:

[0017] The pressure block is inserted into the inner wall of the clamping body, and the gear sample is clamped into the inner wall of the placement groove.

[0018] As a further description of the above technical solution:

[0019] The left end of the lateral adjusting bolt contacts the right surface of the pressure block, and the top end of the longitudinal adjusting bolt contacts the lower surface of the pressure block.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the fixed components can provide support for the gear sample, prevent its longitudinal displacement, and clamp and position the gear sample in the front and back directions, effectively preventing the gear sample from shifting and improving the stability of the gear sample during the test.

[0022] 2. In this utility model, the gear sample can be clamped and positioned in the left and right directions by the cooperation of the positioning components, and both sides of the gear sample can be fixed at the same time to realize the simultaneous loading of both teeth. This can more realistically simulate the actual working state of the gear, thereby more accurately evaluating the bending fatigue performance of the gear.

[0023] 3. In this utility model, the device is easy to install and convenient to debug, which can ensure the operability of the test and improve the success rate of the test. Attached Figure Description

[0024] Figure 1 This is a front view of the three-dimensional structure of the overall device in this utility model;

[0025] Figure 2 This is a schematic cross-sectional view of the three-dimensional structure of the clamping device in this utility model;

[0026] Figure 3This is a three-dimensional structural disassembly diagram of the U-shaped support, gear sample, and fixing assembly in this utility model.

[0027] Legend:

[0028] 1. Clamp body; 11. Pressure block; 12. Lateral adjustment bolt; 13. Longitudinal adjustment bolt; 101. Placement groove; 2. U-shaped support seat; 21. Locking nut; 22. Fixing block; 23. Support shaft; 24. Shim one; 25. Shim two; 26. Fixing bolt; 201. Threaded groove; 3. Gear sample. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 - Figure 2 The present invention provides an embodiment of a test fixture for double-tooth loading in gear bending fatigue testing, comprising a U-shaped support 2, a clamping body 1 on the upper surface of the U-shaped support 2, a fixing component inside the U-shaped support 2, the fixing component being able to clamp and fix the gear sample 3, and a positioning component inside the clamping body 1.

[0031] Reference Figure 1 - Figure 3 The fixing assembly includes a support shaft 23, a first shim 24 sleeved on the outer wall of the support shaft 23, a gear sample 3 sleeved on the outer wall of the support shaft 23, and a second shim 25 sleeved on the outer wall of the support shaft 23. The first shim 24 and the second shim 25 are the same size, and their thicknesses can be adjusted according to the model of the gear sample 3 being processed. A threaded groove 201 is provided at the front end of the outer wall of the support shaft 23. The front surface of the support shaft 23 contacts the rear surface of the U-shaped support seat 2. A locking nut 21 is threadedly connected to the outer wall of the threaded groove 201. The rear surface of the locking nut 21 contacts the front surface of the U-shaped support seat 2. A fixing block 22 is threadedly connected to the upper surface of the U-shaped support seat 2 by a fixing bolt 26. The fixing block 22 can press the support shaft 23 onto the U-shaped support seat 2, ensuring the stability of the support shaft 23.

[0032] Reference Figure 1 - Figure 3The positioning component includes a pressure block 11. A transverse adjusting bolt 12 is threaded through and connected to the right surface of the clamping body 1. When the transverse adjusting bolt 12 is turned, it can squeeze the pressure block 11, causing the pressure block 11 to move laterally. A longitudinal adjusting bolt 13 is threaded through and connected to the lower surface of the clamping body 1. When the longitudinal adjusting bolt 13 is turned, it can squeeze the pressure block 11, causing the pressure block 11 to move longitudinally. A placement groove 101 is provided on the inner wall of the clamping body 1.

[0033] Reference Figure 1 - Figure 3 The gear sample 3 is located between shim 1 24 and shim 25. Shim 1 24 and shim 25 can clamp the gear sample 3, ensuring that the gear sample 3 will not slide back and forth during the test. Shim 25 is located in front of shim 1 24. The support shaft 23 is inserted into the upper surface of the U-shaped support 2. The fixing bolt 26 passes through and is threaded to the upper surface of the fixing block 22. The fixing bolt 26 passes through and is threaded to the upper surface of the U-shaped support 2. The fixing block 22 can be installed on the U-shaped support 2 by fixing bolt 26.

[0034] Reference Figure 1 - Figure 3 The pressure block 11 is inserted into the inner wall of the clamp body 1. Under the squeezing action of the transverse adjusting bolt 12 and the longitudinal adjusting bolt 13, the pressure block 11 can clamp and fix the left and right ends of the gear sample 3 to ensure the stability of the gear sample 3. The gear sample 3 is clamped into the inner wall of the placement groove 101. The left end of the transverse adjusting bolt 12 contacts the right surface of the pressure block 11, and the top end of the longitudinal adjusting bolt 13 contacts the lower surface of the pressure block 11.

[0035] Working principle: When using this device, first select the corresponding shim 24 and shim 25 according to the model of the gear sample 3 to be tested. After selection, first fit the corresponding shim 24 onto the outer wall of the support shaft 23, then fit the gear sample 3 onto the outer wall of the support shaft 23, and finally fit the shim 25 onto the outer wall of the support shaft 23. Then, pinch the shim 24, gear sample 3 and shim 25 and insert them into the U-shaped support seat 2. Then, use the fixing bolt 26 to fix the fixing block 22 onto the U-shaped support seat 2, and turn the locking nut 21 to fix the support shaft 23. At this time, the gear sample 3 cannot move back and forth or longitudinally.

[0036] Then align the teeth on the gear sample 3 with the placement groove 101 and place the clamp body 1 on the gear sample 3.

[0037] During placement, hold the clamp body 1 with your hand and turn the horizontal adjusting bolt 12 and the vertical adjusting bolt 13 to position the pressure block 11. The pressure block 11 will move during positioning and gradually clamp and fix the gear sample 3. When the pressure blocks 11 on both sides firmly clamp the gear sample 3, the clamp body 1, the U-shaped support seat 2, and the gear sample 3 will be connected together. At this time, apply pressure to the clamp body 1 to perform a bending fatigue performance test on the gear sample 3. After the test is completed, turn the horizontal adjusting bolt 12 and the vertical adjusting bolt 13 in the opposite direction, then remove the clamp body 1, and unscrew the locking nut 21 to release the limit on the support shaft 23. Finally, pull out the support shaft 23 to remove the gear sample 3.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test fixture for double-tooth loading in gear bending fatigue testing, comprising a U-shaped support (2), characterized in that: The upper surface of the U-shaped support (2) is provided with a clamping body (1), the interior of the U-shaped support (2) is provided with a fixing component, the interior of the clamping body (1) is provided with a positioning component, the fixing component includes a support shaft (23), a gasket (24) is sleeved on the outer wall of the support shaft (23), a gear sample (3) is sleeved on the outer wall of the support shaft (23), a gasket (25) is sleeved on the outer wall of the support shaft (23), a threaded groove (201) is opened at the front end of the outer wall of the support shaft (23), a locking nut (21) is threaded on the outer wall of the threaded groove (201), and a fixing block (22) is threaded on the upper surface of the U-shaped support (2) by a fixing bolt (26).

2. The test fixture for double-tooth loading in gear bending fatigue testing according to claim 1, characterized in that: The positioning component includes a pressure block (11), a transverse adjusting bolt (12) is threaded through the right surface of the clamping body (1), a longitudinal adjusting bolt (13) is threaded through the lower surface of the clamping body (1), and a placement groove (101) is provided on the inner wall of the clamping body (1).

3. The test fixture for double-tooth loading in gear bending fatigue testing according to claim 1, characterized in that: The gear sample (3) is located between shim one (24) and shim two (25), with shim two (25) located in front of shim one (24).

4. The test fixture for double-tooth loading in gear bending fatigue testing according to claim 1, characterized in that: The support shaft (23) is inserted into the upper surface of the U-shaped support seat (2).

5. A test fixture for double-tooth loading in gear bending fatigue testing according to claim 1, characterized in that: The fixing bolt (26) passes through and is threadedly connected to the upper surface of the fixing block (22), and the fixing bolt (26) passes through and is threadedly connected to the upper surface of the U-shaped support (2).

6. A test fixture for double-tooth loading in gear bending fatigue testing according to claim 2, characterized in that: The pressure block (11) is inserted into the inner wall of the clamping body (1), and the gear sample (3) is snapped into the inner wall of the placement groove (101).

7. A test fixture for double-tooth loading in gear bending fatigue testing according to claim 2, characterized in that: The left end of the lateral adjusting bolt (12) contacts the right surface of the pressure block (11), and the top end of the longitudinal adjusting bolt (13) contacts the lower surface of the pressure block (11).

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