Test equipment and test method for retaining ring shear strength

Abstract

The invention provides test equipment for the compressive strength of check rings. The test equipment comprises a pressure plate, a top cover and a base, wherein a first clamping piece is mounted at the center on the upper surface of the pressure plate, and the lower surface of the pressure plate is a semicircular plane; the top cover is provided with a disc-shaped pressing part and a threaded rod arranged at the center of the pressing part; the base is provided with an upper cylinder and a lower cylinder which are coaxial; the radius of the top surface of the upper cylinder is smaller than that of the lower cylinder; a threaded hole is formed in the center on the top surface of the upper cylinder, and a second clamping piece is mounted at the center on the lower surface of the lower cylinder; the threaded rod of the top cover is in threaded connection with the threaded hole of the base, and the radius of the pressing part is equal to that of the top surface of the upper cylinder. The invention further provides a test method for the compressive strength of the check rings adopting the test equipment. The test equipment and the test method enable a conventional tension tester to measure the compressive strength of the check rings.

Description

technical field [0001] The invention relates to the field of strength detection of retaining rings, in particular to tooling and a test method for the shear strength test of retaining rings. Background technique [0002] Such as figure 1 As shown, the retaining ring 3 in the gearbox is responsible for the separation and positioning of the first driven gear 1 and the second driven gear 2 in different gears, so the retaining ring 3 bears the higher pressure of the first driven gear 1 in the working state. The axial force and the relatively high friction load between the retaining ring 3 and the gear during the rotation of the two gears. Such as figure 2 As shown, the alternating axial force f on the retaining ring 3 will cause plastic deformation or even fracture of the retaining ring 3, thus causing the retaining ring to fail. [0003] When the retaining ring 3 fails in the transmission test, it is an urgent problem to find out the cause from the performance of the retain...

AI Technical Summary

Problems solved by technology

General tensile testing machines, whether hydraulically driven or motor-driven, rely on the clamps on the force-applying parts of the tensile testing machine to clamp the parts to be tested, and then apply force for testing. If the fixture clamps the retaining ring 3, then as image 3 As shown, it is appropriate to measure the tensile strength of the retaining ring 3 under the radial force F, but the shear strength cannot be measured because the pressure cannot be applied to the end face 31 of the retaining ring 3

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