Direct motion guide device and assembly method thereof

A technology of guiding devices and guide rails, which is applied in the direction of linear motion bearings, shafts, bearings, bearings, etc., which can solve the problems of rolling motion damage of rolling elements and reduced sliding performance of sliding elements, and achieve low cost and improved sealing.

Active Publication Date: 2022-05-10
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, in the linear guide device, if foreign matter such as dust enters the rolling path of the rolling element from the gap between the side surface of the guide rail and the inner surface of the sliding body, the rolling motion of the rolling element will be damaged, and the sliding performance of the sliding body will be greatly reduced. The main reason for the decrease

Method used

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  • Direct motion guide device and assembly method thereof
  • Direct motion guide device and assembly method thereof
  • Direct motion guide device and assembly method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0140] Such as figure 1 As shown, the linear guide device of the first embodiment includes a guide rail 1 extending in the axial direction and a slider 2 assembled so as to straddle the guide rail 1 and be relatively movable in the axial direction of the guide rail 1 .

[0141] On the left and right side surfaces 1 a , 1 a of the guide rail 1 , two upper and lower guide rail side track surfaces 10 are formed along the axial direction of the guide rail 1 .

[0142] Such as figure 1 and figure 2 As shown, the slider 2 includes a slider main body 2A and slider end surface members detachably attached to both ends in the axial direction. Examples of the slider end surface member include the end cover 2B, the lubricating unit 21, the side seal 7, the mounting plate 19, and the like. As other sliding body end surface members, various dustproof members and the like can be mentioned.

[0143] The slider main body 2A has an upper portion 5 along the upper surface 1b of the guide ...

no. 2 approach

[0198] Next, refer to Figure 15 as well as Figure 16The lower seal 330 according to the second embodiment will be described. In the above-mentioned embodiment, the sealing cover 32 is formed by stamping a sheet metal, but the sealing cover 332 of the present embodiment is as Figure 15 As shown, it is formed by resin injection molding.

[0199] In addition, in this seal cover 332 , the fitting protrusion 32 d does not have a space SP for receiving the head of the screw 33 , and the head of the screw 33 protrudes downward from the bottom wall 32 a of the seal cover 32 . In this case, the opening 32e formed in the fitting convex portion 32d is constituted by a through hole having the same inner diameter in the thickness direction of the lower seal 330, and the outer peripheral surface of the fitting convex portion 32d has a tapered shape as in the first embodiment.

[0200] Such as Figure 16 As shown, a tapered fitting hole 31c is formed in the sealing member 331 in accor...

no. 3 approach

[0203] Next, refer to Figure 17 (a) and Figure 17 (b) describes the lower seal 430 according to the third embodiment. Such as Figure 17 As shown in (a), the sealing cap 432 of the present embodiment has the side wall portion 32 b and the end wall portion 32 c removed from the sealing cap 32 of the first embodiment. Thereby, the manufacturing cost of the sealing cover 432 can be suppressed. The sealing member 31 is the same as in the above-mentioned embodiment.

[0204] In this embodiment, when the seal member 31 is assembled to the seal cover 432, the inside tapered surface 31d contacts the outside tapered surface 32f, and the fitting hole 31c and the fitting convex portion 32d are fitted and positioned relative to each other.

[0205] Other structures and functions are the same as those of the above-mentioned first embodiment.

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Abstract

The sliding body (2) of the linear motion guide device has: a sliding body main body (2A); a sliding body end face part, which is installed at the moving direction end of the sliding body main body (2A); and a lower seal (30), which closes the guide rail (1) and the gap between the sliding body (2). The lower seal (30) has a seal member (31) having a main lip (31g) in contact with the guide rail (1). The sealing member (31) has a body side lip (31e) protruding toward the lower surface (6c) of the slider body (2A) and extending along the moving direction of the slider (2). The main body side lip (31e) is in contact with both the lower surface (6c) of the slider main body (2A) and the lower surface of the slider end face member. Thereby, high dustproofness and waterproofness can be maintained between the lower surface of the slider main body and the slider end surface member, and the lower seal.

Description

technical field [0001] The present invention relates to a linear motion guide device and an assembly method thereof, in particular to a linear motion guide device used in machine tools, automobile manufacturing equipment, conveying devices and the like and an assembly method thereof. Background technique [0002] Conventionally, a linear motion guide device used in a machine tool etc. generally includes: a guide rail having a rail-side track surface on the left and right side surfaces; a side track surface; and a plurality of rolling elements, which can roll in a linear rolling element rolling path formed between the two track surfaces of the guide rail and the sliding body. Furthermore, the rolling elements roll in the rolling element rolling path, so that the sliding elements relatively move in the axial direction with respect to the guide rail. The rolling elements rolling in the rolling element rolling path are turned back to their original positions through the rolling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C29/06F16C33/76
CPCF16C29/06F16C33/76F16C29/0666F16C29/0673F16C29/088F16C29/086
Inventor 中川匠徐伟森山瞬工藤铁也松本淳五十岚丰中野健太和田厚
Owner NSK LTD
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