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Ball screw

A technology of ball screw and ball, which is applied in the direction of transmission parts, belts/chains/gears, mechanical equipment, etc., and can solve the problem that the lubricant supply device cannot achieve the expected action.

Inactive Publication Date: 2005-10-05
THK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the lubricant returns to the ball rolling groove 11a, the lubricant supply device cannot perform the intended action.

Method used

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  • Ball screw
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Experimental program
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Effect test

Embodiment Construction

[0027] An embodiment of the present invention will be described below with reference to the accompanying drawings. figure 2 is a view showing the positional relationship between the applicator of the lubricant supply mechanism and the wiper lip in the ball screw according to the present invention. As shown in the figure, the lubricant supply mechanism 30 includes a plate-like applicator 31 having a tongue (to be described later) disposed so as to slide in contact with a ball rolling groove 11a provided on the outer periphery of the screw shaft 11 . The applicator 31 is positioned almost parallel to the axial direction of the screw shaft 11 . An oil scraper lip 32 is disposed close to the applicator 31, and forms a predetermined gap between the oil scraper lip 32 and the applicator 31 in a direction opposite to the rotation direction (indicated by arrow C) of the screw shaft 11. . The wiper lip 32 is arranged at a predetermined leading angle θ with respect to the applicator ...

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Abstract

A ball screw having a lubricant oil feeder constructed so as not to allow the lubricating oil in a ball rolling groove to leak outside. A ball screw having a lubricating oil feeding mechanism installed at the shaft end of a nut, and a seal disposed outside the same, wherein the lubricating oil feeding mechanism has an applicator (31) with its front end held in slide contact with the ball rolling groove (11a), it being arranged that the lubricating oil is fed to the ball rolling groove (11a) through the applicator (31), and an oil lip (32) with its front end held in slide contact with the surface of the ball rolling groove (11a) is installed in the vicinity of the applicator (31) with a predetermined spacing (D) defined between the oil lip and the applicator (31).

Description

technical field [0001] The invention relates to a ball screw with a screw shaft and a nut element, wherein seals are provided at both axial ends of the nut element. Background technique [0002] figure 1 is a view showing the structure of one of the aforementioned types of ball screws. figure 1 a is an exploded perspective view showing the overall structure of the ball screw. figure 1 b is a front view of the structure of the wiper ring. figure 1 c is figure 1 Detail of part A in b. The ball screw 10 has a screw shaft 11 having a helical ball rolling groove 11 on its outer peripheral surface along which balls (rolling elements) roll. A nut element 12 is relatively movably mounted on the screw shaft 11 . The inner peripheral surface of the nut member 12 has a ball circulation passage (not shown) including a ball rolling groove (not shown) facing the ball rolling groove 11a. A plurality of balls (rolling elements) 13 are arranged and accommodated in the ball circulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22F16H25/24
CPCF16H25/2204F16H25/2418F16H57/0497Y10T74/18576Y10T74/18568
Inventor 道冈英一八代大辅芳野雅彦
Owner THK CO LTD