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Automatic pre-tightening device for ball screws

A ball screw, automatic technology, used in transmissions, belts/chains/gears, mechanical equipment, etc., can solve problems such as loss of preload adjustment accuracy, large friction resistance, and clearance.

Inactive Publication Date: 2015-11-25
GUANGDONG POLYTECHNIC NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the improvement of dynamic performance, transmission accuracy, transmission power and transmission speed, the accuracy of preload adjustment is lost quickly in this preload mode; gaps appear after bearing heavy loads; excessive preload leads to excessive frictional resistance , transmission efficiency reduction and other issues

Method used

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  • Automatic pre-tightening device for ball screws
  • Automatic pre-tightening device for ball screws
  • Automatic pre-tightening device for ball screws

Examples

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Embodiment Construction

[0015] This implementation example is a specific structure of an automatic pretensioning device for a ball screw, and illustrates the composition and working principle of the device of the present invention through an example. An automatic pre-tightening device for a ball screw consists of a ball screw 1, a backlash-removing ball nut 2, a lock nut 3, a torque applying nut 4, an energy storage spring 5, a left spring pile 6, a pre-tightening nut 7, and an end bearing 8 , Outer sleeve 9, flat key 10, drive ball nut 11, ball 12, right spring pile 13 forms. The anti-backlash ball nut 2 set on the outside of the ball screw 1 is adjacent to the transmission ball nut 11 and installed inside the outer sleeve 9. The outer diameter of the anti-backlash ball nut 2 is provided with a fine thread, which is installed sequentially on the fine thread End face bearing 8, preload nut 7, energy storage spring 5, torque applying nut 4, lock nut 3. The pre-tightening torque is applied to the ener...

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Abstract

The invention provides an automatic pre-tightening device for ball screws. The automatic pre-tightening device is composed of a ball screw, a clearance-eliminating ball nut, a lock nut, a torque applying nut, an energy storage spring, a left spring pile, a right spring pile, a pre-tightening nut, an end bearing, an outer sleeve, a flat key, a transmission ball nut and a ball, wherein the clearance-eliminating ball nut and the transmission ball nut sleeving the ball screw are closely mounted in the outer sleeve; and the end bearing, the pre-tightening nut, the energy storage spring, the torque applying nut and the lock nut are mounted on a fine pitch thread arranged on the outer surface of the clearance-eliminating ball nut. The torque applying nut applies pre-tightening torque to the energy storage spring, the energy storage spring stores energy and transfers the pre-tightening torque to the pre-tightening nut, and the pre-tightening nut applies axial thrust to the outer sleeve through the end bearing under the torque action of the energy storage spring. When a ball screw assembly gets clearance, the transmission ball nut generates relative axial displacement relatively to the clearance-eliminating ball nut, and the transmission clearance between the transmission ball nut and the ball screw is eliminated.

Description

technical field [0001] Ball screw is an important precision mechanical transmission device that converts rotation into linear motion, and is widely used in various mechatronic systems. In order to eliminate the transmission gap, the ball screw is equipped with a preload or gap elimination device. The invention relates to an automatic pretensioning device for a ball screw. Background technique [0002] The backlash elimination devices of the ball screw actually used at present all use the position change of the double nut relative to the lead screw to preload or eliminate the backlash. However, since a fixed preload nut is used, preload adjustment can only be performed before use. Rely on the wear resistance of the material of the lead screw nut to maintain this preload and clearance. However, with the improvement of dynamic performance, transmission accuracy, transmission power and transmission speed, the accuracy of preload adjustment is lost quickly in this preload mode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
CPCF16H25/22F16H25/2204F16H25/2209
Inventor 屈圭严薇
Owner GUANGDONG POLYTECHNIC NORMAL UNIV
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