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A self-adjusting pretightening force ball screw pair

A ball screw pair, automatic adjustment technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problem that the ball screw pair that can automatically adjust the pretightening force has not been found, so as to achieve a simple structure and ease the impact , the effect of improving the contact stiffness

Active Publication Date: 2016-08-10
江苏启尖丝杠制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have conducted a lot of research on the preload control of the ball screw pair. Through literature search, no automatic adjustment of the preload ball screw pair has been found.

Method used

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  • A self-adjusting pretightening force ball screw pair
  • A self-adjusting pretightening force ball screw pair

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Experimental program
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Embodiment Construction

[0012] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] Such as Figure 1-2 As shown, a ball screw pair for automatically adjusting the pretightening force, the screw pair includes a ball screw 1, a screw nut A2, a screw nut B3, a pressure sensor 4, and a pretightening force adjustment device 5; specifically, Lead screw nut A2 and lead screw nut B3 are respectively installed at both ends of ball screw 1, lead screw nut A2 and lead screw nut B3 can rotate on ball screw 1 through ball transmission and thread fit; said lead screw nut A2, A pressure sensor 4 is installed on the opposite contact surface of the lead screw nut B3, and a pre-tightening force adjustment device 5 is fixed between the two pressure sensors 4; the pressure sensor 4 is a pressure strain gauge, and the pre-tightening force adjustment device 5 is a hollow rubber Air bag; the pre-tightening force adjusting device 5 is close...

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Abstract

The invention discloses a ball screw pair capable of automatically adjusting pretightening force and belongs to the technical field of pretightening force control of ball screw pairs. By the adoption of the structure, the pretightening force can be adjusted according to the types of screws and it is guaranteed that the value of the pretightening force is constant in the operation process of a ball screw. A pretightening force adjusting device is an inflated rubber air bag or a hydraulic oil rubber air bag. The pretightening force adjusting device is simple and compact in structure, high in reliability and high in operability. In addition, the pressure intensity of compressed air or oil pressure can be adjusted to adapt to ball screw pairs of different types and the contact rigidity between the ball screw and a roller path is improved; according to the automatic pretightening force adjusting device (the rubber air bag), impact on the screw by nuts can be relieved when the ball screw pair is suddenly stopped or started, and vibration and abrasion of the ball screw pair are reduced.

Description

technical field [0001] The invention relates to an automatically adjusting pretightening force ball screw pair, which belongs to the technical field of ball screw pair pretightening force control. Background technique [0002] With the development of high-speed and precision CNC machine tools, the performance requirements for ball screw pairs are also getting higher and higher. In order to eliminate the gap existing in the ball screw pair and improve the contact rigidity between the ball and the raceway, a double nut preload structure is usually adopted. Due to the friction between the balls of the ball screw pair and the nut and the screw, the ball screw has different degrees of wear during operation. With the extension of the running time of the ball screw, the gap between the two nuts increases. As the force becomes smaller, adjusting the pretightening force of the ball screw requires stopping the machine to replace the gasket or adjusting the axial rotation angle betwee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/22
CPCF16H25/2209
Inventor 孔德顺王民高相胜胡建忠昝涛李文禹
Owner 江苏启尖丝杠制造有限公司
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