Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double nut precision ball screw pair

A ball screw pair and ball screw technology are applied in metal processing mechanical parts, metal processing, metal processing equipment and other directions, which can solve the problems of unsuitable nut rotation driving screw working mode, and achieve reliable axial preload, Axial rigidity and high reliability, the effect of high axial rigidity

Pending Publication Date: 2017-12-22
YUHUAN CNC MACHINE TOOL
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this anti-backlash method is not suitable for the precise and reliable working method of nut rotation driving screw feed from the structural form

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double nut precision ball screw pair
  • Double nut precision ball screw pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] See figure 1 , the double-nut precision ball screw pair provided by the present invention includes a ball nut and a ball screw 1 that is driven by the ball nut and can only be fed axially. The ball screw 1 is in the cylindrical hole of the above sliding bearing 2 and Axial feed motion is performed on the common reference axis A formed by the cylindrical hole of the lower sliding bearing 8, the upper and lower sliding bearings 2, 8 are fixedly connected with the box body 9, and there are two gaps between the upper sliding bearing 2 and the ball screw 1. A symmetrical flat key (not shown in the figure) to prevent the ball screw 1 from rotating relative to the sliding bearings 2 and 8 when it moves up and down; the ball nut is composed of a main ball nut 4 and an auxiliary ball nut 6, and the ball nut The diameter of the ball 10 in the ball is slightly smaller than the diameter of the ball nut and the upper raceway of the ball screw 1. There is a certain gap between the ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a double nut precision ball screw pair. The double nut precision ball screw pair comprises ball nuts and a ball screw which is supported through upper and lower supporting components, is driven through rotation of the ball nut and can only do axial feeding; the ball nuts are composed of the main ball nut and the auxiliary ball nut which are relatively limited in the circumferential direction and can relatively move in the axial direction, the ball diameter of the ball nuts is slightly smaller than the diameter of rollaway nests on the ball nuts and the ball screw, and the lower supporting component is sleeved with an anti-backlash nut capable of doing spiral rotation relative to the lower supporting component so as to be in axial contact with the auxiliary ball nut; and the main ball nut and the anti-backlash nut are driven by the driving device to rotate. By means of the double nut precision ball screw pair, high-precision and high-rigidness axial movement of the ball screws along the main design standard shaft of a machine tool can be guaranteed.

Description

technical field [0001] The invention belongs to a screw pair, in particular to a double-nut precision ball screw pair. Background technique [0002] The working mode of the ball screw pair is that the nut rotates to drive the screw to move axially (the screw does not rotate). Large diameter ball screws (see figure 1 ), the outer diameter of the screw rod is ≥Ф120mm, and it is generally a hollow structure, which contains a set of independent rotating spindle mechanism (not shown in the figure). Due to the large diameter of the screw rod, the outer cylindrical surface of the screw rod itself is a sliding guide rail, so the precision of the axial feed motion of the cylindrical surface of the screw rod is very high. The axial cutting force F of the screw rod fluctuates greatly with the wear of the tool (grinding tool), the change of the feed rate of the tool and the workpiece, and the change of the area of ​​the cutting area. Under this working condition, in order to ensure t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23Q5/40B23Q5/56
CPCB23Q5/40B23Q5/56
Inventor 许亮彭关清张少军
Owner YUHUAN CNC MACHINE TOOL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com