Clamp for assisting torsion machine in testing torsion

Abstract

The utility model relates to the technical field of torsion test fixtures, and particularly discloses a fixture for assisting a torsion machine to test torsion, comprising a cylindrical mandrel and a bolt, the mandrel is internally and coaxially provided with a square hole for accommodating a to-be-tested part, the mandrel is provided with a threaded hole along the radial direction to be communicated with the square hole, and the bolt is arranged in the threaded hole. Threaded holes are formed in the mandrel, bolts are arranged in the threaded holes to clamp a part to be tested, the four threaded holes are evenly distributed in the side, close to the end face of the mandrel, of the mandrel, the part is clamped through the bolts in the four directions, clamping stability is guaranteed, knob parts are arranged on the outer sides of the bolts, the diameter of the knob parts is larger than that of the bolts, the bolts can be screwed down manually conveniently, operation is more convenient, and work efficiency is improved. Through the auxiliary clamp, a conventional torsion machine can also perform torsion test on small parts, special test equipment is not needed, and the production cost is effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of torque testing fixture technology, specifically a fixture for assisting a torque tester in testing torque. Background Technology

[0002] Existing conventional torque testers use a three-jaw chuck to clamp both ends of a part, and rotate the chuck to test the torque of the part. However, existing three-jaw chucks cannot directly clamp small parts with a diameter less than 5mm, preventing conventional torque testers from directly testing the torque of small parts. For example, consider a small shaft-like part... Figure 1 As shown, the outer diameter of the large end of the part is greater than 5mm, and the outer diameter of the small end of the part is 5mm with flat surfaces on both sides of the outer circle. When performing torque testing on it, the three-jaw chuck of a conventional torque tester cannot clamp the small end of the part tightly, resulting in the inability to perform the test normally. If a special testing device is specially equipped, it will inevitably increase the production cost, and the practicality of the special device is not high. Therefore, it is necessary to design a fixture to assist the torque tester in clamping small parts, so that the conventional torque tester can perform torque testing on small parts with a diameter of less than 5mm. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention provides a fixture to assist torque testing machines in testing torque, thus solving the problem that the three-jaw chuck of existing torque machines cannot clamp small parts.

[0004] To solve the above problems, the technical solution adopted by this utility model is: a fixture for testing torque using an auxiliary torque tester, comprising a mandrel and a bolt. The mandrel is a cylinder, and a square hole is coaxially provided inside the mandrel for accommodating the part to be tested. A threaded hole is provided on the mandrel along the radial direction, communicating with the square hole. A bolt is provided inside the threaded hole to clamp the part to be tested.

[0005] Furthermore, the threaded holes are four evenly distributed on one side of the mandrel near the end face of the mandrel.

[0006] Furthermore, the side length of the square hole is 6mm.

[0007] Furthermore, the bolt has a knob on its outer side, and the diameter of the knob is larger than the diameter of the bolt.

[0008] Furthermore, the square hole extends through the mandrel.

[0009] Furthermore, the outer diameter of the mandrel is 12mm.

[0010] The beneficial effects of this solution are as follows: Compared with the existing technology, this new solution clamps the small parts to be tested by setting square holes and bolts in the mandrel, and then clamps the mandrel with a three-jaw chuck of a conventional torque machine. With the help of auxiliary fixtures, the conventional torque machine can also perform torque testing on small parts without the need for special testing equipment, thus effectively controlling production costs. Attached Figure Description

[0011] Figure 1 Schematic diagram of a small shaft-type part;

[0012] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the clamping of the part to be tested;

[0014] In the diagram: 1-mandrel, 2-bolt, 3-part to be tested, 4-three-jaw chuck, 11-square hole, 21-knob, 31-plane. Detailed Implementation

[0015] 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.

[0016] Implementation, for example, attached Figure 2 The image shows a fixture for testing torque using an auxiliary torque tester, comprising a mandrel 1 and bolts 2. The mandrel 1 is cylindrical, with a square hole 11 coaxially arranged inside for accommodating a part 3 to be tested. A threaded hole is radially arranged on the mandrel 1, communicating with the square hole 11. Bolts 2 are installed within the threaded holes to clamp the part 3. The threaded holes are four in number, evenly distributed on one side of the mandrel 1 near its end face. The four bolts 2 clamp the part, ensuring stable clamping. A knob 21 is provided on the outer side of each bolt 2, with a diameter larger than that of the bolt 2, facilitating manual tightening and making operation more convenient. The square hole 11 has a side length of 6mm, allowing the part 3 to pass freely through it. The square hole 11 extends through the mandrel 1, allowing longer parts to pass through and be clamped, improving the fixture's versatility. The outer diameter of the mandrel 1 is 12mm, resulting in a threaded hole length of 5mm. This compact structure ensures stable bolt installation and guarantees effective clamping.

[0017] The specific implementation process is as follows:

[0018] like Figure 3As shown, when using the fixture, first use the three-jaw chuck 4 of a conventional torque wrench to clamp the side of the mandrel 1 without bolts 2. Insert the end of the part to be tested 3 with an outer diameter of 5mm into the square hole of the mandrel 1, so that the plane 31 on the outer circle of the part to be tested 3 is located at bolt 2. The large end of the part to be tested 3 is clamped by the other three-jaw chuck 4 of the torque wrench. At this time, the part to be tested 3 is coaxial with the mandrel 1. Tighten two of the bolts 2 to clamp the planes 31 close to both sides of the small end of the part to be tested 3. Tighten the other two bolts 2 to press against the outer circle of the small end of the part to be tested 3 to prevent the part from shaking. At this time, both ends of the part to be tested 3 are clamped, and the torque test can be performed on it. This auxiliary fixture allows the three-jaw chuck 4 of a conventional torque wrench to clamp small parts with a diameter of less than 5mm, thereby performing torque tests, and effectively reducing production costs.

[0019] If the diameters of both ends of the test part are equal and less than or equal to 5mm, the clamps of this utility model are set on the three-jaw chucks on both sides of the torque machine. First, clamp one end of the part, and use a dial indicator to calibrate the roundness so that the other end of the part is coaxial with the mandrel 1. Tighten the bolt 2 to clamp it.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A fixture for assisting a torque tester in testing torque, characterized in that: It includes a mandrel and a bolt. The mandrel is cylindrical and has a square hole coaxially arranged inside for accommodating the part to be tested. The mandrel has a threaded hole along the radial direction that communicates with the square hole. The bolt is arranged inside the threaded hole to clamp the part to be tested.

2. The fixture for testing torque using an auxiliary torque tester according to claim 1, characterized in that: The threaded holes are four evenly distributed on one side of the mandrel near the end face of the mandrel.

3. The fixture for testing torque using an auxiliary torque tester according to claim 1, characterized in that: The square hole has a side length of 6mm.

4. The fixture for testing torque using an auxiliary torque tester according to claim 1, characterized in that: The bolt has a knob on its outer side, and the diameter of the knob is larger than the diameter of the bolt.

5. The fixture for testing torque using an auxiliary torque tester according to claim 1, characterized in that: The square hole penetrates the mandrel.

6. The fixture for testing torque using an auxiliary torque tester according to claim 1, characterized in that: The outer diameter of the mandrel is 12mm.

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