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Ball screw

一种滚珠螺杆、滚珠的技术，应用在传动装置零件、皮带/链条/齿轮、机械设备等方向，能够解决润滑剂供应装置不能实现预期动作用等问题

Inactive Publication Date: 2008-03-26
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] An embodiment of the present invention will be described below with reference to the accompanying drawings. 2 is a view showing a positional relationship between an applicator of a lubricant supply mechanism and an oil 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 31 .

[0...

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PUM

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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] FIG. 1 is a view showing the structure of a ball screw of the aforementioned type. Fig. 1a is an exploded perspective view showing the overall structure of the ball screw. Figure 1b is a front view of the structure of a wiper ring. Fig. 1c is a detail view of part A in Fig. 1b. 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 passage. The b...

Claims

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Application Information

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