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Rolling screw device

A technology of scrolling helix and helix, which is applied in the field of scrolling helical devices, and can solve the problems of persistent decline of scrolling helical devices, etc.

Inactive Publication Date: 2006-02-15
NSK LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consequently, damage such as cracks in the tongues of the end deflectors can occur prematurely, sometimes reducing the durability of the rolling screw

Method used

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  • Rolling screw device
  • Rolling screw device
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Experimental program
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Embodiment Construction

[0026] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0027] Figure 1 to Figure 3 is a view showing an embodiment of the present invention. Such as figure 1 As shown, the rolling screw device according to this embodiment includes a screw shaft 11, a cylindrical nut 12 that relatively moves in the axial direction of the screw shaft 11, and balls 13 as a plurality of rolling elements assembled in the nut 12. .

[0028] The screw shaft 11 has a transverse plane perpendicular to the axial direction, which plane is formed in a circular shape, and a spiral inner rolling element raceway groove 14 is formed on the outer circumferential surface of the screw shaft 11, and extends from a section of the screw shaft 11 to another side.

[0029] The nut 12 has an inner peripheral surface opposite to the outer peripheral surface of the screw shaft 11 on which a helical outer rolling element raceway groove 15 is form...

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PUM

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Abstract

A rolling screw device capable of suppressing the rather early occurrence of damage such as cracking on the tongue of an end deflector, wherein the tip part (20a) of the tongue (20) hit by a ball (13) as a rolling element is chamfered in arc shape to increase the contact area of the tip part (20a) of the tongue (20) with the ball (13).

Description

technical field [0001] The present invention relates to a rolling screw device, such as a ball screw or a roller screw used in a machine tool feed device, as a mechanical component that converts a rotary motion such as a motor into a linear motion, and in particular to a rolling screw of the internal circulation type Spiral device. Background technique [0002] A rolling screw device used in a feeding device such as a machine tool, comprising: a screw shaft having a helical inner rolling element raceway groove on its outer peripheral surface; Helical outer rolling element raceway groove opposite to the rolling element raceway groove, in which a plurality of rolling elements assembled in the nut are moved through the rolling element rolling channel when either the screw shaft or the nut rotates around the axis of rotation For rolling movement, the channel is formed between the inner rolling element raceway groove and the outer rolling element raceway groove, and at the same ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
CPCF16H25/2219Y10T74/19772
Inventor 水口淳二矢部孝之
Owner NSK LTD