A threaded type of pull-out locking torque test tool
By designing a test fixture for the locking torque of threaded tapped pins, the problem of clamping difficulties in the locking performance test of threaded tapped pins was solved by utilizing a shrinkage gap and an anti-rotation structure, thus achieving uniform clamping and reliable test data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU MEITE AVIATION MFG CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-06-19
AI Technical Summary
In the aviation and aerospace fields, the locking performance test of threaded pins is difficult to effectively clamp, which makes the locking torque test difficult.
A threaded pin locking torque test fixture was designed, including a first washer, a second washer, and a clamp. By setting a contraction joint and an anti-rotation structure, the clamp ensures that the clamp evenly clamps the pin body, and the limiting ring prevents rotation, thus achieving effective installation and testing.
This method enables reliable installation and uniform clamping of threaded tapping pins, ensuring the authenticity and reliability of test data, avoiding local deformation of the pin body, and guaranteeing the accuracy of test results.
Smart Images
Figure CN224382687U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of nail-pulling torque testing equipment, and in particular relates to a threaded nail-pulling torque testing fixture. Background Technology
[0002] Threaded pull studs are widely used in the aviation and aerospace fields, and locking performance is an important indicator of threaded pull stud performance. When conducting locking torque tests on threaded pull studs, it is necessary to clamp the core rod and the stud body separately. However, due to product structure limitations, it is not possible to effectively clamp the stud body, making the locking torque test difficult. Therefore, a locking torque test fixture for threaded pull studs was designed. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a threaded pin locking torque test fixture that can effectively clamp the threaded pin during the locking torque test.
[0004] This utility model is achieved through the following technical solution: a threaded pin locking torque testing fixture, comprising:
[0005] A first gasket, wherein the first gasket is provided with a first mounting hole that is adapted to the product under test;
[0006] The second gasket has a second mounting hole that is compatible with the product under test.
[0007] A jacket, wherein the jacket is provided with a third mounting hole adapted to the product under test, and the jacket is provided with a plurality of shrinkage slits, the plurality of shrinkage slits being evenly distributed around the axis of the third mounting hole;
[0008] The jacket is located between the first gasket and the second gasket, and the first mounting hole, the second mounting hole and the third mounting hole are coaxial.
[0009] Furthermore, the first gasket, the second gasket, and the jacket are all annular structures, and the outer diameter of the jacket is larger than the outer diameter of the first gasket and the second gasket.
[0010] Furthermore, the torque testing fixture also includes a limiting ring, the central hole of which is a stepped hole, and multiple first anti-rotation structures are provided on the inner wall of the large hole section of the stepped hole. The diameter of the large hole section of the stepped hole is equal to the outer diameter of the jacket.
[0011] The first gasket, the second gasket, and the jacket are located in the large hole section of the stepped hole, and the outer surfaces of the first gasket, the second gasket, and the jacket are provided with a second anti-rotation structure corresponding to the first anti-rotation structure.
[0012] Furthermore, the first gasket is placed on the platform surface of the stepped hole, the sleeve is placed on the side of the first gasket away from the platform surface, and the second gasket is placed on the side of the sleeve away from the first gasket.
[0013] Furthermore, the outer wall of the limiting ring is provided with a clamping part.
[0014] Furthermore, the clamping part includes two planar structures located on the outer sidewall of the limiting ring and parallel to each other.
[0015] Furthermore, both the first anti-rotation structure and the second anti-rotation structure are planar structures.
[0016] Furthermore, the plurality of shrinkage joints includes a first shrinkage joint and a second shrinkage joint; the first shrinkage joint is a gap that penetrates the jacket along the axial direction of the third mounting hole and communicates with the outer side wall of the jacket, and the second shrinkage joint is a gap that penetrates the jacket along the axial direction of the third mounting hole and communicates with the third mounting hole.
[0017] Furthermore, the first and second shrinkage seams are distributed alternately.
[0018] Compared with the prior art, this utility model has the following advantages and beneficial effects: This utility model provides a threaded pin locking torque test fixture, and the installation of the product under test in the locking torque test fixture is consistent with the actual installation in use; during the test, the clamping force of the torque testing machine is evenly applied to the pin body rod through the clamp, avoiding local deformation of the pin body. This locking torque test fixture can ensure that the test data is true and reliable. Attached Figure Description
[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:
[0020] Figure 1 A schematic diagram of a threaded taper;
[0021] Figure 2 A cross-sectional schematic diagram of a threaded pull pin;
[0022] Figure 3 This is a schematic diagram of a locking torque testing fixture in this utility model;
[0023] Figure 4 This is a schematic diagram of the first gasket in this utility model;
[0024] Figure 5 This is a schematic diagram of one type of second gasket in this utility model;
[0025] Figure 6 This is a schematic diagram of one type of jacket in this utility model;
[0026] Figure 7 This is a schematic diagram of the threaded tapping pins being assembled on the testing device in this utility model;
[0027] Figure 8 This is a cross-sectional schematic diagram of the threaded tapping pins assembled on the test device in this utility model;
[0028] Figure 9 This is a schematic diagram of a limiting ring in this utility model;
[0029] Figure 10 This is another schematic diagram of the locking torque testing fixture in this utility model;
[0030] Figure 11 This is another cross-sectional schematic diagram of the locking torque testing fixture in this utility model;
[0031] Figure 12 This is another schematic diagram of the threaded tapping pins assembled on the test device in this utility model;
[0032] Figure 13 This is another cross-sectional schematic diagram of the threaded tapping pins assembled on the test device in this utility model;
[0033] In the figure, 11—core rod, 12—nail body, 13—nail sleeve, 14—ring, 15—drive nut, 21—first washer, 211—first mounting hole, 212—second anti-rotation structure, 22—second washer, 221—second mounting hole, 23—clamp, 231—third mounting hole, 232—shrinkage joint, 31—limiting ring, 311—first anti-rotation structure, 312—platform surface, 313—clamping part. Detailed Implementation
[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0035] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0036] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] like Figures 1 to 13 As shown, this utility model discloses a threaded pin locking torque testing fixture.
[0039] like Figure 1 and Figure 2 As shown, the threaded pull pin includes a core rod 11, a pin body 12, a pin sleeve 13, a ring 14, and a drive nut 15. The ring 14 is disposed inside the pin sleeve 13, and the pin sleeve 13 is mounted on the pin body 12. One end of the core rod 11 passes through the pin sleeve 13 and extends into the pin body 12. The core rod 11 is threadedly connected to the pin body 12.
[0040] like Figure 3 As shown, a threaded pin locking torque test fixture includes a first washer 21, a second washer 22, and a sleeve 23.
[0041] like Figure 4 As shown, the first gasket 21 has a first mounting hole 211 that is adapted to the product under test (such as a threaded tap); Figure 5 As shown, the second gasket 22 is provided with a second mounting hole 221 that is adapted to the product under test; as Figure 6 As shown, the jacket 23 is provided with a third mounting hole 231 that is adapted to the product under test.
[0042] The first mounting hole 211, the second mounting hole 221 and the third mounting hole 231 are coaxial, thus forming the mounting holes of the product under test.
[0043] For example, if the product under test is a threaded tap, then the first mounting hole 211, the second mounting hole 221 and the third mounting hole 231 are all adapted to the tap body 12 of the threaded tap, and the first mounting hole 211, the second mounting hole 221 and the third mounting hole 231 are coaxial to form the mounting hole of the threaded tap.
[0044] The sleeve 23 is located between the first gasket 21 and the second gasket 22. The sleeve 23 is provided with a plurality of contraction slots 232, which are evenly distributed around the axis of the third mounting hole 231.
[0045] like Figure 7 and Figure 8 As shown, in use, the threaded pull pin is installed into the mounting hole of the locking torque test fixture. One end of the torque tester clamps the sleeve 23, and after the sleeve 23 retracts, it clamps the nail body 12 of the threaded pull pin. The other end of the torque tester clamps the head of the core rod 11, and the locking torque test can be performed on the product under test.
[0046] The process of installing the threaded pull pin into the locking torque test fixture is as follows: Install the threaded pull pin into the mounting hole of the locking torque test fixture, use the appropriate installation tool to fix the drive nut 15, and at the same time rotate the core rod 11. Under the action of the thread, the threaded pull pin reaches... Figure 1 and Figure 2 When the core rod 11 breaks along the broken neck groove as shown, the installation is complete (the drive nut 15 and the excess core rod 11 after the breakage are discarded).
[0047] In this embodiment, by setting the first gasket 21 and the second gasket 22, the shrinkage gap of the jacket 23 can be prevented from affecting the installation of the tested product.
[0048] In some embodiments of this example, the first gasket 21, the second gasket 22, and the clamp 23 are all annular structures. The outer diameter of the clamp 23 is larger than the outer diameter of the first gasket 21 and the second gasket 22, which facilitates applying clamping force to the clamp 23 individually during testing. In these embodiments, while ensuring the effectiveness of the second anti-rotation structure 212 of the first gasket 21 and the second gasket 22, the outer diameter of the first gasket 21 and the second gasket 22 is slightly smaller than the outer diameter of the clamp 23.
[0049] The central axis of the first gasket 21 coincides with the axis of the first mounting hole 211, the central axis of the second gasket 22 coincides with the axis of the second mounting hole 221, and the central axis of the sleeve 23 coincides with the axis of the third mounting hole 231.
[0050] In some implementations of this embodiment, such as Figure 9As shown, the torque testing fixture also includes a limiting ring 31. The central hole of the limiting ring 31 is a stepped hole. Multiple first anti-rotation structures 311 are provided on the inner wall of the large hole section of the stepped hole. The diameter of the large hole section of the stepped hole is equal to the outer diameter of the jacket 23.
[0051] like Figure 10 and Figure 11 As shown, the first gasket 21, the second gasket 22 and the sleeve 23 are located in the large hole section of the stepped hole, and the outer side walls of the first gasket 21, the second gasket 22 and the sleeve 23 are all provided with a second anti-rotation structure 212 corresponding to the first anti-rotation structure 311.
[0052] In these embodiments, the central hole of the limiting ring 31 is a stepped hole. Specifically, the central hole of the limiting ring 31 includes a large hole section and a small hole section. The diameter of the large hole section is larger than the diameter of the small hole section, and the large hole section communicates with the small hole section. The first gasket 21, the second gasket 22, and the sleeve 23 are all located in the large hole section of the limiting ring 31. The outer diameters of the first gasket 21, the second gasket 22, and the sleeve 23 are larger than the diameter of the small hole section. The outer diameters of the first gasket 21 and the second gasket 22 are smaller than the diameter of the large hole section, and the outer diameter of the sleeve 23 is equal to the diameter of the large hole section. However, the outer diameter of the sleeve 23 can be slightly smaller than the diameter of the large hole section to facilitate inserting or removing the sleeve 23 from the large hole section of the limiting ring 31.
[0053] In these embodiments, a plurality of first anti-rotation structures 311 are provided on the inner wall of the large hole section of the stepped hole, and a second anti-rotation structure 212 is provided on the outer wall of the first gasket 21, the second gasket 22 and the sleeve 23. The second anti-rotation structure 212 corresponds to the first anti-rotation structure 311. Through the cooperation of the first anti-rotation structure 311 and the second anti-rotation structure 212, the first gasket 21, the second gasket 22 and the sleeve 23 can be effectively prevented from rotating with the threaded pin during the process of installing the threaded pin into the locking torque test fixture, thus ensuring the installation quality.
[0054] like Figure 12 and Figure 13 As shown, in use, the first gasket 21, the sleeve 23, and the second gasket 22 are sequentially installed into the limiting ring 31. Then, the threaded pin is installed into the mounting hole of the locking torque test fixture. The limiting ring 31 is then removed. One end of the torque tester is used to clamp the sleeve 23, causing the sleeve 23 to retract and clamp the pin body 12 of the threaded pin. The other end of the torque tester clamps the head of the core rod 11, and the locking torque test can be performed on the product under test.
[0055] In some embodiments of this example, the first gasket 21 is placed on the platform surface 312 of the stepped hole, the sleeve 23 is placed on the side of the first gasket 21 away from the platform surface 312, and the second gasket 22 is placed on the side of the sleeve 23 away from the first gasket 21.
[0056] In some embodiments of this example, the outer wall of the limiting ring 31 is provided with a clamping part 313, which facilitates the installation of the test fixture for fixing the locking torque when installing the product under test.
[0057] In some embodiments of this example, the clamping part 313 includes two planar structures located on the outer side wall of the limiting ring 31 and parallel to each other, that is, the outer side wall of the limiting ring 31 is provided with two parallel planar structures.
[0058] In some embodiments of this example, both the first anti-rotation structure 311 and the second anti-rotation structure 212 are planar structures.
[0059] For example, the inner wall of the large hole section of the limiting ring 31 is provided with a planar structure, which is the first anti-rotation structure 311; the outer walls of the first gasket 21, the second gasket 22 and the jacket 23 are all provided with a planar structure, which is the second anti-rotation structure 212.
[0060] For example, the inner wall of the large hole section of the limiting ring 31 is provided with three planar structures, which are evenly distributed around the axis of the large hole section; the outer wall of the first gasket 21 is provided with three planar structures, which are evenly distributed around the axis of the first mounting hole 211; the outer wall of the second gasket 22 is provided with three planar structures, which are evenly distributed around the axis of the second mounting hole 221; and the outer wall of the jacket 23 is provided with three planar structures, which are evenly distributed around the axis of the third mounting hole.
[0061] In some embodiments of this example, the plurality of shrinkage joints 232 include a first shrinkage joint and a second shrinkage joint. The first shrinkage joint is a gap that passes through the sleeve 23 along the axial direction of the third mounting hole 231 and communicates with the outer side wall of the sleeve 23. The second shrinkage joint is a gap that passes through the sleeve 23 along the axial direction of the third mounting hole 231 and communicates with the third mounting hole 231.
[0062] In some embodiments of this example, the first shrinkage joint and the second shrinkage joint are distributed in an alternating manner, that is, the shrinkage joints 232 adjacent to each first shrinkage joint on both sides are second shrinkage joints, and the shrinkage joints 232 adjacent to each second shrinkage joint on both sides are first shrinkage joints.
[0063] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A threaded type puller locking torque test tooling, characterized by, include: A first gasket, wherein the first gasket is provided with a first mounting hole that is adapted to the product under test; The second gasket has a second mounting hole that is compatible with the product under test. A jacket, wherein the jacket is provided with a third mounting hole adapted to the product under test, and the jacket is provided with a plurality of shrinkage slits, the plurality of shrinkage slits being evenly distributed around the axis of the third mounting hole; The jacket is located between the first gasket and the second gasket, and the first mounting hole, the second mounting hole and the third mounting hole are coaxial.
2. The threaded pin locking torque test tool of claim 1, wherein, The first gasket, the second gasket, and the jacket are all annular structures, and the outer diameter of the jacket is larger than the outer diameter of the first gasket and the second gasket.
3. The threaded pin locking torque test tool of claim 2, wherein, The torque testing fixture also includes a limiting ring, the central hole of which is a stepped hole, and multiple first anti-rotation structures are provided on the inner wall of the large hole section of the stepped hole. The diameter of the large hole section of the stepped hole is equal to the outer diameter of the jacket. The first gasket, the second gasket, and the jacket are located in the large hole section of the stepped hole, and the outer surfaces of the first gasket, the second gasket, and the jacket are provided with a second anti-rotation structure corresponding to the first anti-rotation structure.
4. The threaded pin locking torque testing fixture according to claim 3, characterized in that, The first gasket is placed on the platform surface of the stepped hole, the sleeve is placed on the side of the first gasket away from the platform surface, and the second gasket is placed on the side of the sleeve away from the first gasket.
5. The threaded pin locking torque testing fixture according to claim 3, characterized in that, The outer wall of the limiting ring is provided with a clamping part.
6. The threaded pin locking torque testing fixture according to claim 5, characterized in that, The clamping part includes two planar structures located on the outer sidewall of the limiting ring and parallel to each other.
7. The threaded pin locking torque testing fixture according to claim 3, characterized in that, Both the first anti-rotation structure and the second anti-rotation structure are planar structures.
8. The threaded pin locking torque testing fixture according to claim 1, characterized in that, The plurality of shrinkage joints includes a first shrinkage joint and a second shrinkage joint; the first shrinkage joint is a gap that penetrates the jacket along the axial direction of the third mounting hole and communicates with the outer wall of the jacket, and the second shrinkage joint is a gap that penetrates the jacket along the axial direction of the third mounting hole and communicates with the third mounting hole.
9. A threaded pin locking torque testing fixture according to claim 8, characterized in that, The first and second shrinkage joints are intersected.