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Ball screw device

A technology of screw devices and balls, which is applied in the direction of transmission devices, belts/chains/gears, mechanical equipment, etc., can solve problems such as easy to generate noise and vibration, improve productivity, increase load capacity, improve operability and durability Effect

Inactive Publication Date: 2008-01-09
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the ball screw device in which the ball return passage is formed through the circulation pipe, when the ball is pulled from the load rotation path to the return passage, since the ball collides with the tenon portion formed at the end of the circulation pipe, there is a tendency to generate noise and problems like vibration

Method used

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Embodiment Construction

[0033] Next, embodiments of the present invention will be described with reference to the drawings.

[0034] First, the configuration of the embodiment of the present invention will be described with reference to FIG. 1 . In addition, the same reference numerals will be assigned to the same structures as those in FIG. 3 and FIG. 4 for description.

[0035] The ball screw device according to this embodiment includes: a screw having a helical screw-side ball rotation groove on the outer peripheral surface; a nut having a nut-side ball rotation groove opposing the screw-side ball rotation groove on the inner peripheral surface; and Multiple balls are rotatably packed in the load rotation path formed between two ball rotation grooves.

[0036] The nut is the same as the existing ball screw device shown in Figure 4, with an end deflector that causes the balls moving in the load rotation path to cock from one end to the tangential direction of the screw, and makes the cocking The ...

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PUM

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Abstract

A ball screw device enabling an increase in operability and productivity. The ball screw device (1) comprises a screw shaft (4) having a spiral screw shaft side ball rolling groove on its outer peripheral surface, nuts (2) having nut side ball rolling grooves facing the screw shaft side ball rolling groove on their inner peripheral surfaces, and a large number of balls rollingly loaded into a load rolling passage formed between both ball rolling grooves. Each of the nuts (2) comprises an end deflector picking up, from one end part, the balls moving in the load rolling passage in the tangential direction of the screw shaft and returning the balls picked up from the other end part into the load rolling passage. The two nuts (2a) and (2b) are connected to each other along the axial direction of the screw shaft (4) in the state of their both opposed end faces in contact with each other.

Description

technical field [0001] The present invention relates to a ball screw device used for various feeding devices, especially a ball screw device for machine tools and the like requiring a high load capacity. Background technique [0002] In the ball screw device used in existing machine tools, since the balls that move while rotating in the load rotation path are endlessly circulated, the ball return path is formed through the circulation pipe, and the ball composed of the load rotation path and the return path There are many occasions for infinite loop paths. However, in the ball screw device in which the ball return passage is formed through the circulation pipe, when the ball is pulled from the load rotation path to the return passage, since the ball collides with the tenon portion formed at the end of the circulation pipe, there is a tendency to generate noise and issues like vibration. [0003] As a ball screw device that solves this problem, for example, it is described ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22F16H25/24
CPCF16H25/2219F16H25/2204Y10T74/19772
Inventor 水口淳二
Owner NSK LTD