A small planetary roller screw pair accuracy and efficiency detection device

Abstract

The invention relates to a precision and efficiency detection device for a small planetary roller screw pair. The precision and efficiency detection device comprises a servo motor, a torque sensor, arotary encoder, a linear guide rail displacement sensor, an elastic clamping sleeve and a replacement rod. The rear end bevel of the elastic clamping sleeve makes contact with the bevel of a mountingshaft, and a clamping sleeve nut is rotated to enable the elastic clamping sleeve to elastically deform to clamp and fix lead screws; the linear guide rail displacement sensor provides guidance for the nut and also accurately measures axial displacement of the nut; in the testing process, a conical pin is utilized to fixedly connect a nut connecting rod with a mounting adapter, during dismounting,the conical pin is pulled out, and thus mounting and dismounting of the lead screw pair are convenient; a system torque error test under the same load condition is conducted through the equivalent replacement rod for error compensation; and a through groove is milled in the middle of a bottom plate, and a standard is provided for mounting of all components. The problem of the system torque errorin the testing process is solved, a solution is put forward for clamping of the small planetary roller screw pair, and the precision and efficiency of the lead screw pair can be accurately detected.

Description

technical field [0001] The invention relates to a performance detection device for a planetary roller screw pair, in particular to a precision and efficiency detection device for a small planetary roller screw pair, and belongs to the technical field of precision detection of mechanical equipment. Background technique [0002] The planetary roller screw pair is a high-precision mechanical transmission mechanism that converts the input rotational torque of the system into a linear thrust. Its basic principle is similar to that of a ball screw. Compared with the multi-point contact of the ball screw, the force of the planetary roller screw is line contact. The increase of the contact surface will greatly improve the bearing capacity and rigidity of the planetary roller screw. And the planetary roller screw has the advantages of high speed, long life and high motion precision. These characteristics of the planetary roller screw mechanism make it an ideal choice for application...

AI Technical Summary

Problems solved by technology

Domestic research and development of precision and efficiency testing devices for small planetary roller screw pairs is not very complete. Some of them are manually tested, and the readings themselves will produce deviations. The solution to the clamping problem of the screw pair is given. The invention patent CN105890895A discloses "a comprehensive performance test bench for planetary roller screw pairs". The test bench uses a motor-driven screw for rotation testing and a hydraulic system for loading. However, the compensation of the system error is not considered. When the torque is driven by a small torque, the measurement of the torque will produce a large error

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