Torsion test auxiliary tool
By designing an auxiliary fixture for torque testing, the problem that hexagonal wrench torque testers cannot test cylindrical cable fixing heads was solved, enabling torque testing of cylindrical cable fixing heads and improving testing accuracy and applicability.
Patent Information
- Application Number
- CN202422771338.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-13
AI Technical Summary
Existing hex wrench torque testers cannot perform torque tests on cylindrical cable clamps.
Design a torque testing auxiliary fixture, including a left mold and a right mold, with positioning protrusions and torque parts, which can be fastened to the outside of the cable fixing head and the torque can be applied by a hex wrench for testing.
It enables torque testing of cylindrical cable clamps, ensuring testing accuracy and uniform force distribution, and is applicable to cable clamps of different sizes.
Smart Images
Figure CN223485350U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing equipment technology, and more specifically, to a torque testing auxiliary fixture. Background Technology
[0002] Cable torque standards have significant application value in the manufacturing and maintenance of cable connectors. Specifically, on the one hand, cable torque standards ensure the reliability and stability of the cable connection process; on the other hand, during cable operation, cable torque standards can serve as a testing method, using appropriate tools to check the tightness of cable connectors and prevent electrical faults caused by poor electrical contact; furthermore, cable torque standards also ensure the waterproof and dustproof performance of cable connectors, extending the cable's service life and improving the reliability and safety of equipment. Therefore, in the manufacturing and maintenance of cable connectors, torque standards should be strictly adhered to, and corresponding testing and calibration measures should be taken to ensure the normal operation and service life of the cables.
[0003] Currently, hexagonal wrenches adapted to torque testers are commonly used to test cable clamps, which is convenient to operate. However, in order to meet the market's demands for cable clamps in terms of appearance, size, performance, and other aspects, cylindrical cable clamps with grooves on their outer circumference have gradually emerged. Due to the changes in the appearance of cable clamps, existing hexagonal wrench torque testers are unable to perform torque tests on these cable clamps.
[0004] In summary, how to provide an auxiliary fixture that enables a hex wrench torque tester to test cylindrical cable fixing heads is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide an auxiliary fixture for torque testing, which can be used to test the torque of cylindrical cable fixing heads using a hexagonal wrench torque tester.
[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:
[0007] A torque testing auxiliary fixture is used to test a cylindrical cable fixing head. The fixture body includes a left mold and a right mold, both of which have receiving grooves to be snapped onto the outside of the cable fixing head.
[0008] The positioning protrusion is located on the inner wall of the fixture body and is used to be inserted into the groove on the outside of the cable fixing head.
[0009] The fixture body has a torque section on its outer periphery to apply torque to the cable fixing head in conjunction with a hexagonal wrench.
[0010] Preferably, the positioning protrusions are fitted with corresponding grooves of the cable fixing head with a clearance.
[0011] Preferably, when the left mold and the right mold are fastened together, the receiving groove of the left mold and the receiving groove of the right mold together form a cylindrical insertion through hole, so that its bottom end is in clearance fit with the cable fixing head.
[0012] Preferably, the slot of the left mold has a plurality of first insert teeth along its own length direction, and a first insertion groove is provided between adjacent first insert teeth;
[0013] The slot of the right mold has a number of second insert teeth along its own length direction, and there is a second insertion groove between adjacent second insert teeth.
[0014] A plurality of second insert teeth are used to be inserted into the corresponding first insert grooves, and a plurality of first insert teeth are used to be inserted into the corresponding second insert grooves to fasten and form a cylindrical structure.
[0015] Preferably, the first insert tooth at the bottom end of the left mold has a semi-annular structure.
[0016] Preferably, the end faces of the first insert teeth located on both sides of the left mold slot and arranged opposite each other are coplanar, and the bottoms of the first insertion slots located on both sides of the left mold slot and arranged opposite each other are coplanar.
[0017] The end faces of the second insert teeth located on both sides of the right mold slot and arranged opposite each other are coplanar, and the bottoms of the second insertion slots located on both sides of the right mold slot and arranged opposite each other are coplanar.
[0018] Preferably, the two ends of the first insert tooth at the top of the left mold are fixedly connected to the corresponding side of the slot of the left mold;
[0019] And / or, the central angle of the groove segment of the left mold with the first insert tooth is an abscissa or a circumferential angle, the central angle of the groove segment of the left mold with the first insertion groove is an acute angle or a straight angle, the central angle of the groove segment of the right mold with the second insert tooth is a right angle or an obtuse angle, and the central angle of the groove segment of the right mold with the second insertion groove is a right angle or an acute angle.
[0020] Preferably, the fixture body having the torque section is a hexagonal tube.
[0021] Preferably, the edges of the positioning protrusion are chamfered to guide the positioning protrusion of the right mold into the corresponding groove.
[0022] Preferably, the top of the fixture body is provided with a mark, and several of the marks correspond to the positions of the positioning protrusions to indicate the positions of the positioning protrusions.
[0023] The torque testing auxiliary fixture provided by this utility model has a left mold and a right mold divided into two halves in the fixture body, both of which are provided with receiving grooves. The groove wall of the receiving groove has a positioning protrusion extending into the groove so as to be inserted into the groove on the outer periphery of the cable fixing head, thereby transmitting torque to the cable fixing head. The outer periphery of the fixture body has a torque part so as to be able to engage with a hex wrench, so that a hex wrench can be used to apply torque to the cable fixing head through the auxiliary fixture.
[0024] In use, the left and right mold slots are positioned opposite each other and brought close together, so that the positioning protrusion is inserted into the groove on the outer periphery of the cable fixing head until they are snapped together to form a cylindrical structure. The cable fixing head is then fitted into the inner cavity of the auxiliary fixture, and a hex wrench can be engaged on the outside of the fixture. Torque is applied to the cylindrical cable fixing head through the auxiliary fixture for testing. The torque of the cylindrical cable fixing head can be tested using a hex wrench torque tester in related technologies using this auxiliary fixture. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the cable fixing head to be tested;
[0027] Figure 2 This is a schematic diagram of the structure of the left mold in a specific embodiment of this utility model;
[0028] Figure 3 A top view of the left mold of a specific embodiment provided by this utility model;
[0029] Figure 4 This is a schematic diagram of the right mold of a specific embodiment provided by this utility model;
[0030] Figure 5 Top view of the right mold of the specific embodiment provided by this utility model;
[0031] Figure 6 This is an overall schematic diagram of a specific embodiment provided by this utility model.
[0032] Reference numerals:
[0033] 1- Fixture body; 11- Left mold; 111- First insert tooth; 112- First insertion slot; 12- Right mold; 121- Second insert tooth; 122- Second insertion slot; 13- Receiving groove; 2- Positioning protrusion; 3- Torque part; 4- Marking;
[0034] 5-Cable fixing head; 51-Groove. Detailed Implementation
[0035] 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.
[0036] The core of this utility model is to provide an auxiliary fixture for torque testing, which can be used to test the torque of a cylindrical cable fixing head 5 using a hexagonal wrench torque tester.
[0037] Please refer to Figure 1 This utility model provides a torque testing auxiliary fixture for testing cylindrical cable fixing heads 5, including a fixture body 1, a positioning protrusion 2, and a torque part 3. The fixture body 1 includes a left mold 11 and a right mold 12, both having receiving grooves 13 for fastening onto the outside of the cable fixing head 5. The positioning protrusion 2 is located on the inner wall of the fixture body 1, and is used to insert into the groove 51 on the outside of the cable fixing head 5. The torque part 3 is located on the outer periphery of the fixture body 1 to apply torque to the cable fixing head 5 using a hexagonal wrench.
[0038] like Figures 2 to 6 As shown, in the jig body 1, the left mold 11 and the right mold 12, which are divided into two halves, are both provided with receiving grooves 13. The groove wall of the receiving groove 13 has a positioning protrusion 2 extending into the groove, which is inserted into the groove 51 on the outer periphery of the cable fixing head 5, so that torque can be transmitted to the cable fixing head 5. The outer periphery of the jig body 1 has a torque part 3, such as a semi-circular protrusion structure extending around the circumference with a polygonal prism shape on the outer periphery, or a full-ring protrusion structure extending around the circumference with a hexagonal prism shape on the outer periphery, so that a hexagonal wrench can be engaged and used to apply torque to the cable fixing head 5 through the auxiliary jig.
[0039] It should be noted that the type, number, and distribution of the positioning protrusions 2 are not limited, as long as they can be inserted into the groove 51 of the cable fixing head 5. For example, the positioning protrusions 2 can be rectangular protrusions extending circumferentially, and / or, the positioning protrusions 2 can also be triangular protrusions, etc.; only one positioning protrusion 2 can be provided, or two, four, six, or several positioning protrusions 2 can be provided. Preferably, several positioning protrusions 2 are arranged in a ring around the inner circumference of the fixture body 1, and the symmetrical arrangement of several positioning protrusions 2 is beneficial to improving the uniformity of force distribution.
[0040] In use, the slots of the left mold 11 and the right mold 12 are positioned opposite each other and brought close together, so that the positioning protrusion 2 is inserted into the groove 51 on the outer periphery of the cable fixing head 5 until they are snapped together to form a cylindrical structure. The cable fixing head 5 is then fitted into the inner cavity of the auxiliary fixture, and a hex wrench can be attached to the outside of the fixture. Torque is applied to the cylindrical cable fixing head 5 through the auxiliary fixture for testing. The torque of the cylindrical cable fixing head 5 can be tested using a hex wrench torque tester in related technologies using the auxiliary fixture.
[0041] Based on the above embodiment, several positioning protrusions 2 are fitted with corresponding grooves 51 of the cable fixing head 5 with a clearance. This arrangement helps to prevent the auxiliary fixture from deflecting too much relative to the cable fixing head 5 to be tested during the torque test, so as to ensure the accuracy of the torque test.
[0042] Based on the above embodiment, when the left mold 11 and the right mold 12 are fastened together, the receiving groove 13 of the left mold 11 and the receiving groove 13 of the right mold 12 surround each other to form a cylindrical insertion through hole, so that its bottom end is in clearance fit with the cable fixing head 5.
[0043] like Figure 6 As shown, after the left mold 11 and the right mold 12 are fastened together, the inner cavity of the fixture body 1 is a cylindrical insertion through hole for inserting the cylindrical cable fixing head 5. Since the cable fixing head 5 is usually required to have a bottom diameter larger than its top diameter, in this embodiment, through the tolerance design of the insertion through hole, when the auxiliary fixture is sleeved on the outside of the cable fixing head 5, the bottom inner wall of the cable fixing head 5 is in clearance fit with the bottom inner wall of the auxiliary fixture. This setting helps to reduce the manufacturing difficulty of the auxiliary fixture.
[0044] Based on the above embodiment, the slot of the left mold 11 has a plurality of first insert teeth 111 along its own length direction, and a first insertion groove 112 is provided between adjacent first insert teeth 111; the slot of the right mold 12 has a plurality of second insert teeth 121 along its own length direction, and a second insertion groove 122 is provided between adjacent second insert teeth 121; the plurality of second insert teeth 121 are used to be inserted into the corresponding first insertion groove 112, and the plurality of first insert teeth 111 are used to be inserted into the corresponding second insertion groove 122, so as to fasten and form a cylindrical structure.
[0045] like Figure 2 As shown, the left mold 11 has several protruding structures on one side of the slot as first insert teeth 111. The upper and lower surfaces of the first insert teeth 111 are perpendicular to the axial direction of the left mold 11, and a space is reserved between adjacent first insert teeth 111 along the length direction of the left mold 11 as a first insertion groove 112. These grooves are designed to cooperate as follows: Figure 4 As shown, the right mold 12 has several protruding structures on one side of the slot as second insert teeth 121. The upper and lower surfaces of the second insert teeth 121 are perpendicular to the axial direction of the right mold 12, and a space is reserved between adjacent second insert teeth 121 along the length direction of the right mold 12 as a second insertion groove 122. After the left mold 11 and the right mold 12 are fastened together, as shown... Figure 6 As shown, a number of first insert teeth 111 are inserted into corresponding second insert slots 122, and a number of second insert teeth 121 are inserted into corresponding first insert slots 112. This arrangement helps to prevent the left mold 11 and the right mold 12 from separating.
[0046] Based on the above embodiment, the first insert tooth 111 at the bottom of the left mold 11 has a semi-circular structure, such as... Figure 2 and Figure 4 As shown, the first groove segment at the lower end of the left mold 11 and the fourth groove segment at the lower end of the right mold 12 are both semi-circular structures. This allows them to be arranged relative to each other to form a complete ring to cover the outer periphery of the cable fixing head 5, while effectively preventing interference between the left mold 11 and the right mold 12 and the cable fixing head 5 during the fastening process.
[0047] Based on the above embodiment, the end faces of the first insert teeth 111 located on both sides of the slot of the left mold 11 and arranged opposite each other are coplanar, and the bottoms of the first insertion slots 112 located on both sides of the slot of the left mold 11 and arranged opposite each other are coplanar; the end faces of the second insert teeth 121 located on both sides of the slot of the right mold 12 and arranged opposite each other are coplanar, and the bottoms of the second insertion slots 122 located on both sides of the slot of the right mold 12 and arranged opposite each other are coplanar.
[0048] like Figure 2As shown, the left mold 11 has circumferentially extending protrusions on both sides of its slot as first insertion teeth 111. The end faces of the first insertion teeth 111 on both sides of the slot of the left mold 11 are coplanar with the free ends of the protrusions on both sides of the slot of the left mold 11, and the bottoms of the slots on both sides of the slot of the left mold 11 are coplanar with the bottoms of the slots inside the first insertion groove 112. Similarly, the corresponding... Figure 4 As shown, the right mold 12 has circumferentially extending protrusions on both sides of its own slot as second insert teeth 121. The end faces of the free ends of the second insert teeth 121 on both sides of the slot of the right mold 12 are coplanar, and the bottoms of the slots on both sides of the slot of the right mold 12 are coplanar. After the left mold 11 and the right mold 12 are engaged, the end faces of the free ends of several first insert teeth 111 on both sides of the slot of the left mold 11 are attached to the bottom of the corresponding second insert slot 122 in the right mold 12, and the end faces of the free ends of several second insert teeth 121 on both sides of the slot of the right mold 12 are attached to the bottom of the corresponding first insert slot 112 in the right mold 12.
[0049] Preferred, such as Figure 5 As shown, the end faces of the free ends of several second insert teeth 121 located on both sides of the slot of the right mold 12 are all perpendicular to the corresponding radial direction of the right mold 12, and the bottoms of several second insertion slots 122 located on both sides of the slot of the right mold 12 are all perpendicular to the corresponding radial direction of the right mold 12. Correspondingly, the end faces of the free ends of several first insert teeth 111 located on both sides of the slot of the left mold 11 are all perpendicular to the corresponding radial direction of the left mold 11, and the bottoms of several first insertion slots 112 located on both sides of the slot of the left mold 11 are all perpendicular to the corresponding radial direction of the left mold 11. This arrangement is conducive to the left mold 11 and the right mold 12 being properly engaged.
[0050] Based on the above embodiment, the two ends of the first insert tooth 111 at the top of the left mold 11 are fixedly connected to the corresponding side of the slot of the left mold 11, such as... Figure 2 and Figure 6 As shown, the upper end of the left mold 11 is a full-circumference ring structure. In use, the left mold 11 and / or the cable fixing head 5 can be moved from top to bottom to make them fit together. Before the left mold 11 is fitted into place, the lower end of the left mold 11 is pushed away from the cable fixing head 5. After the left mold 11 is fitted into place, the lower end of the left mold 11 is pushed in the opposite direction to move closer to the cable fixing head 5, so that the positioning protrusion 2 on the left mold 11 is inserted into the corresponding groove 51 on the outer periphery of the cable fixing head 5. Then, the right mold 12 is moved from right to left, so that the right mold 12 is close to the left mold 11 and fastened on the left mold 11 to cover the cable fixing joint. The positioning protrusion 2 on the right mold 12 is inserted into the corresponding groove 51 on the outer periphery of the cable fixing head 5. This setting helps to prevent the auxiliary fixture from detaching from the cable fixing head 5.
[0051] Based on the above embodiments, the center angle of the groove segment with the first insert tooth 111 of the left mold 11 is an abscissa or a circumferential angle, the center angle of the groove segment with the first insertion groove 112 of the left mold 11 is an acute angle or a straight angle, the center angle of the groove segment with the second insert tooth 121 of the right mold 12 is a right angle or an obtuse angle, and the center angle of the groove segment with the second insertion groove 122 of the right mold 12 is a right angle or an acute angle.
[0052] like Figure 2 As shown, the center angle of the groove segment of the left mold 11 with the first insert tooth 111 is greater than 180 degrees and less than or equal to 306 degrees, while the center angle of the groove segment of the left mold 11 with the first insertion groove 112 is less than or equal to 180 degrees, and they are matched as follows: Figure 4 As shown, the center angle of the groove segment with the second insert tooth 121 of the right mold 12 is greater than or equal to 90 degrees and less than 180 degrees, and the center angle of the groove segment with the second insertion groove 122 of the right mold 12 is less than or equal to 90 degrees. Preferably, the center angle of the groove segment with the first insert tooth 111 of the left mold 11 decreases one by one along its own length direction, and the center angle of the groove segment with the second insert tooth 121 of the right mold 12 decreases one by one along its own length direction.
[0053] Since the cable fixing head 5 is usually required to have a bottom diameter larger than its top diameter, this setting allows the auxiliary fixture to be snapped in place. When using a hexagonal wrench to engage with the auxiliary fixture, it is beneficial to ensure that both the left mold 11 and the right mold 12 are in contact with the hexagonal wrench during the testing of the cable fixing head 5, thereby improving the uniformity of force distribution.
[0054] Based on the above embodiment, the fixture body 1, which includes the torque section 3, is a hexagonal tube, such as... Figure 6 As shown, the fixture body 1, which removes the positioning protrusion 2, is a hexagonal tube. With this design, the auxiliary fixture has a simple structure and is easy to manufacture.
[0055] Based on the above embodiment, the edges of the positioning protrusion 2 are chamfered to guide the positioning protrusion 2 of the right mold 12 into the corresponding groove 51. This arrangement helps to prevent the positioning protrusion 2 from colliding with the cable fixing head 5 when it is inserted into the groove 51, and can guide the positioning protrusion 2 to be smoothly inserted into the groove 51.
[0056] Based on the above embodiment, the top of the fixture body 1 is provided with a mark 4, and several marks 4 correspond to the positions of the corresponding positioning protrusions 2 to indicate the positions of the positioning protrusions 2.
[0057] like Figure 3 As shown, a mark 4 is provided on the upper end of the fixture body 1. The mark 4 can be a scale line or an arrow, so that the position of each positioning protrusion 2 can be determined by the mark 4, so as to adjust the cable fixing head 5 and / or the auxiliary fixture, so that the positioning protrusion 2 can be accurately inserted into the groove 51 on the periphery of the cable fixing head 5.
[0058] Based on the above embodiments, the left mold 11, the corresponding positioning protrusion 2, and the corresponding torque part 3 are integrated structural components, and the right mold 12, the corresponding positioning protrusion 2, and the corresponding torque part 3 are integrated structural components.
[0059] Based on any of the above embodiments, the outer wall of the fixture body 1 has a second groove 51. Several fixture bodies 1 can be sequentially fitted or separated from the inside to the outside. When in use, fixture bodies 1 with different inner diameters can be selected to test cable fixing heads 5 of different sizes. This arrangement facilitates the storage and arrangement of several fixture bodies 1, and the auxiliary fixture can be applied to cable fixing heads 5 of different sizes.
[0060] It should be noted that the relational terms such as "first" and "second" mentioned above are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities; the terms "upper surface," "lower surface," "top," and "bottom" and the directional terms "upper," "lower," "left," and "right" mentioned above are defined based on the accompanying drawings in the specification.
[0061] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0062] The torque testing auxiliary fixture provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.
Claims
1. A torque testing auxiliary fixture for testing cylindrical cable fixing heads (5), characterized in that, include: The fixture body (1) includes a left mold (11) and a right mold (12), both of which have receiving grooves (13) to be able to be fastened and sleeved on the outside of the cable fixing head (5); The positioning protrusion (2) is located on the inner wall of the fixture body (1). The positioning protrusion (2) is used to be inserted into the groove (51) on the outside of the cable fixing head (5). Torque section (3): The outer periphery of the fixture body (1) has the torque section (3) to apply torque to the cable fixing head (5) in conjunction with a hexagonal wrench.
2. The torque testing auxiliary fixture according to claim 1, characterized in that, The positioning protrusions (2) are fitted with the corresponding grooves (51) of the cable fixing head (5) with clearance.
3. The torque testing auxiliary fixture according to claim 1, characterized in that, When the left mold (11) and the right mold (12) are fastened together, the receiving groove (13) of the left mold (11) and the receiving groove (13) of the right mold (12) surround each other to form a cylindrical insertion through hole, so that its bottom end is in clearance fit with the cable fixing head (5).
4. The torque testing auxiliary fixture according to claim 3, characterized in that, The slot of the left mold (11) has a plurality of first insert teeth (111) along its own length direction, and there is a first insertion groove (112) between adjacent first insert teeth (111). The right mold (12) has a number of second insert teeth (121) along its own length direction, and there is a second insertion groove (122) between adjacent second insert teeth (121). A plurality of second insert teeth (121) are used to be inserted into the corresponding first insert groove (112), and a plurality of first insert teeth (111) are used to be inserted into the corresponding second insert groove (122) to fasten and form a cylindrical structure.
5. The torque testing auxiliary fixture according to claim 4, characterized in that, The first insert tooth (111) at the bottom of the left mold (11) is a semi-ring structure.
6. The torque testing auxiliary fixture according to claim 5, characterized in that, The end faces of the first insert teeth (111) located on both sides of the slot of the left mold (11) and arranged opposite to each other are coplanar, and the bottoms of the first insertion slots (112) located on both sides of the slot of the left mold (11) and arranged opposite to each other are coplanar. The end faces of the second insert teeth (121) located on both sides of the slot of the right mold (12) and arranged opposite to each other are coplanar, and the bottoms of the second insertion slots (122) located on both sides of the slot of the right mold (12) and arranged opposite to each other are coplanar.
7. The torque testing auxiliary fixture according to claim 5, characterized in that, The two ends of the first insert tooth (111) at the top of the left mold (11) are fixedly connected to the corresponding side of the slot of the left mold (11); And / or, the central angle of the groove segment of the left mold (11) having the first insert tooth (111) is an abscissa or a circumferential angle, the central angle of the groove segment of the left mold (11) having the first insertion groove (112) is an acute angle or a straight angle, the central angle of the groove segment of the right mold (12) having the second insert tooth (121) is a right angle or an obtuse angle, and the central angle of the groove segment of the right mold (12) having the second insertion groove (122) is a right angle or an acute angle.
8. The torque testing auxiliary fixture according to any one of claims 1 to 7, characterized in that, The fixture body (1) with the torque part (3) is a hexagonal tube.
9. The torque testing auxiliary fixture according to any one of claims 1 to 7, characterized in that, The positioning protrusion (2) has chamfered edges to guide the positioning protrusion (2) of the right mold (12) to be inserted into the corresponding groove (51).
10. The torque testing auxiliary fixture according to any one of claims 1 to 7, characterized in that, The top of the fixture body (1) is provided with a mark (4), and several of the marks (4) correspond to the positions of the positioning protrusions (2) to indicate the positions of the positioning protrusions (2).