High-centering precision clamp connecting device for mechanical testing machine

Abstract

The invention discloses a high-centering precision clamp connecting device for a mechanical testing machine. The high-centering precision clamp connecting device for the mechanical testing machine comprises a clamping part, a fixing part and a connecting part, wherein a positioning convex conical surface is arranged on the end surface of one end, connected with the connecting part, of the clampingpart; a positive-tooth external thread is close to the positioning convex conical surface, and is used for connecting and locking the connecting part in a matching manner; a positioning concave conical surface is arranged on the end surface of the other end, connected with the fixing part, of the connecting part; a reverse-tooth external thread is close to the positioning concave conical surface,and is used for connecting and locking the connecting part in a matching manner; the connecting part is a connecting thread sleeve with a positive-tooth external thread and a reverse-tooth external thread at the two ends respectively. The high-centering precision clamp connecting device for the mechanical testing machine is compact in structure, light, convenient, low in production cost and easyto operate; meanwhile, extremely high centering precision of a clamp and a pull rod of the testing machine can be guaranteed during an experiment, and connection is steady; compared with the conventional flange plant connection, the connection way adopted by the invention can have the advantage that the axial position of the clamp is continuously adjustable.

Description

technical field [0001] The invention relates to a high-centering-precision fixture coupling device for a mechanical testing machine, which belongs to the field of material testing equipment, but is not limited thereto. The invention also covers occasions where high-centering precision connections between parts are required in other industries. Background technique [0002] The types of fixtures for testing machines can be divided into: universal fixtures; special fixtures; adjustable fixtures; combined fixtures. The fixtures play an important role in fixing the samples of different shapes on the high-frequency fatigue testing machine. A testing machine is usually equipped with several sets of fixtures of different specifications. [0003] However, for the connection between the fixture and the testing machine, the common nut tensioning structure has poor centering performance, the axial force is large, and the sample bears an extra bending moment due to eccentricity; althoug...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the technology of the present invention is to overcome the problem that the threaded connection of the traditional fatigue fixture has poor alignment and seriously affects the test results. Installed into the fixture, the circumferential direction of the fixture cannot be adjusted, which may cause additional torsion to the sample

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