Knife-edge universal joints for deadweight small force standard devices

Abstract

The invention discloses a knife edge universal joint used for a dead load type micro-force value standard device. The knife edge universal joint comprises a cross head, a first knife edge, a second knife edge, a universal joint base and a universal joint pull head; a first through groove is formed in the upper portion of the cross head, a second through groove is formed in the lower portion of the cross head, the first knife edge is arranged in the first through groove, the two ends of the first knife edge stretch out of the first through groove, the second knife edge is arranged in the second through groove, the two ends of the second knife edge stretch out of the second through groove, the universal joint base is connected with the two ends of the first knife edge, and is used for fixing the knife edge universal joint to the dead load type micro-force value standard device, the universal joint base can swing with the first knife edge as the axis, the universal joint pull head is connected with the two ends of the second knife edge, and the universal joint pull head can swing with the second knife edge as the axis. Meanwhile, in the swing process, knife edge liner contact is achieved, the friction force is small, and the knife edge universal joint is small in friction force, high in accuracy, small in space position and suitable for being used for the dead load type micro-force value standard device

Description

technical field [0001] The invention relates to the field of force value measurement, in particular to a knife-edge universal joint used for a deadweight micro force value standard device. Background technique [0002] The universal joint is an important part of the force standard machine. When measuring the force value of the tensile force sensor, it can ensure that the force axis of the sensor is consistent with the gravity axis. The traditional force standard machine universal joint generally uses joint bearings as the support source, which has a complex structure, takes up a lot of space, and has high friction. In order to adapt to the requirement of small force value reproduction and reduce the uncertainty of tensile force measurement, it is necessary to improve the structure of the universal joint and improve its coaxial adjustment effect. [0003] Therefore, it is necessary to develop a knife-edge universal joint with small frictional force, high accuracy, and small ...

AI Technical Summary

Problems solved by technology

The traditional force standard machine universal joint generally uses joint bearings as the support source, which has a complex structure, takes up a lot of space, and has high friction

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