End cap, and linear guide device including the end cap

Patent metadata

Field	Value
Publication number	US-9528553-B2
Application number	US-201314423855-A
Country	US
Kind code	B2
Filing date	Aug 26, 2013
Priority date	Aug 27, 2012
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

An oil passage obstruction wall member (W) is configured to obstruct an oil passage having plural pathways configured to communicate plural oil supply openings ( 6 ) at plural locations on an outer circumference of an end cap ( 1 ) included in a linear guide device arranged such that a bottom face of a guide rail is arranged on a face slanted at an angle ranging from 0 degrees to 180 degrees with respect to a plane face, with a direction change passage ( 4 ) configured to communicate a rolling element rolling passage formed between the guide rail and the slider body with a rolling element return passage included in the slider body. The oil passage obstruction wall member (W) is selectively opened depending on the angle of the face on which the bottom face of the guide rail is arranged to selectively communicate the direction change passage ( 4 ) and the oil supply openings ( 6 ).

First claim

The invention claimed is:

1. An end cap included in a linear guide device and attached on an end face in a moving direction of a slider body that straddles a guide rail of the linear guide device, the end cap comprising:
a trunk portion; and
a pair of sleeve portions arranged on both sides of the trunk portion in a width direction of the guide rail and coupled by the trunk portion, each of the pair of sleeve portions comprising:
a direction change passage formation depression portion provided on a face facing the slider body and configured to form a direction change passage that communicates a rolling element rolling passage formed between the guide rail and the slider body with a rolling element return passage included in the slider body;
a plurality of oil supply openings at a plurality of locations on an outer periphery of the end cap;
an oil passage comprising a plurality of pathways configured to communicate the plurality of oil supply openings with the direction change passage formation depression portion; and
an oil passage obstruction wall member integrally formed with the end cap and configured to obstruct each of the plurality of pathways of the oil passage,

wherein the direction change passage formation depression portion is configured to be selectively communicated with the plurality of oil supply openings, by opening the oil passage obstruction wall member configured to obstruct each of the plurality of pathways of the oil passage depending on an angle of a face on which a bottom face of the guide rail is arranged, when the angle ranges from 0 degrees to 180 degrees.

2. The end cap according to claim 1 ,
wherein the direction change passage formation depression portion is one of a pair of direction change passage formation portions comprising a left side direction change passage formation depression portion and a right side direction change passage formation depression portion respectively formed at the pair of sleeve portions,
wherein when the bottom face of the guide rail is arranged on the face that is plane, a pathway of the plurality of oil pathways of the oil passage is configured to communicate one of the plurality of oil supply openings located on an upper side in a vertical direction of the end cap with the left side direction change passage formation depression portion and the right side direction change passage formation depression portion, and
wherein when viewed from the moving direction of the slider body, the pathway is configured to originate from the one of the plurality of oil supply openings located on the upper side in the vertical direction, to branch at a part between the left side direction change passage formation depression portion and the right side direction change passage formation depression portion, and to reach the left side direction change passage formation depression portion and the right side direction change passage formation depression portion.

3. The end cap according to claim 1 ,
wherein the direction change passage formation depression portion is one of a pair of direction change passage portions comprising a left side direction change passage formation depression portion and a right side direction change passage formation depression portion respectively formed at the pair of sleeve portions,
wherein when the bottom face of the guide rail is arranged on the face having the angle of 90 degrees, a pathway of the plurality of oil pathways of the oil passage is configured to communicate one of the plurality of oil supply openings located on an upper side in a vertical direction of the end cap with the left side direction change passage formation depression portion and the right side direction change passage formation depression portion, and
wherein when viewed from the moving direction of the slider body, the pathway is configured to originate from the one of the plurality of oil supply openings located on the upper side in the vertical direction, to branch at a part in either one of the left side direction change passage formation depression portion or the right side direction change passage formation depression portion, which is closer to the one of the plurality of oil supply openings located on the upper side in the vertical direction, and to reach the left side direction change passage formation depression portion and the right side direction change passage formation depression portion.

4. The end cap according to claim 1 ,
wherein the direction change passage formation depression portion is one of a pair of direction change passage formation portions comprising a left side direction change passage formation depression portion and a right side direction change passage formation depression portion respectively formed at the pair of sleeve portions,
wherein when the bottom face of the guide rail is arranged on the face that is slanted, a pathway of the plurality of oil pathways of the oil passage is configured to communicate one of the plurality of oil supply openings located on an upper side in a vertical direction of the end cap with the left side direction change passage formation depression portion and the right side direction change passage formation depression portion, and
wherein when viewed from the moving direction of the slider body, the pathway is configured to originate from the one of the plurality of oil supply openings located on the upper side in the vertical direction, to extend in the vertical direction along the face that is slanted, to branch at a part in either one of the left side direction change passage formation depression portion or the right side direction change passage formation depression portion, which is closer to the one of the plurality of oil supply openings located on the upper side in the vertical direction, and to reach the left side direction change passage formation depression portion and the right side direction change passage formation depression portion.

5. The end cap according to claim 1 ,
wherein the oil passage comprises:
an upper oil passage formation portion and a lower oil passage formation portion respectively obstructed by the oil passage obstruction wall member;
a central oil passage formation portion configured to communicate the upper oil passage formation portion with the lower oil passage formation portion at a partway; and
a lubricant introduction passage configured to communicate the lower oil passage formation portion with the direction change passage formation depression portion,

wherein the direction change passage is one of a pair of direction change passages and the direction change passage formation depression portion is one of a pair of direction change passage formation portions, and the lubricant introduction passage comprises:
a return guide side oil passage arranged on a return guide configured to form each of the pair of direction change passages together with each of the pair of direction change passage formation depression portions; and
a lubricant supply opening arranged in the return guide side oil passage,

wherein the lower oil passage formation portion is provided closer to the guide rail than to the upper oil passage formation portion, and
wherein when the end cap is jointed with the end face in the moving direction of the slider body, at least one of the upper oil passage formation portion or the lower oil passage formation portion is configured to be selectively communicated with one of the plurality of oil supply openings, by selectively opening the oil passage obstruction wall member configured to obstruct the each of the plurality of pathways of the oil passage.

6. The end cap according to claim 5 , wherein the lubricant supply opening is arranged at a center part of the pair of direction change passage formation depression portions, in a par

Assignees

• Nsk Ltd

Inventors

• Nishiyama Kazuhito
• Nakagawa Takumi

Classifications

• F16C33/723

  Shaft end sealing means, e.g. cup-shaped caps or covers · CPC title

• F16C29/04

  Ball or roller bearings · CPC title

• F16C33/6659 Primary

  Details of supply of the liquid to the bearing, e.g. passages or nozzles · CPC title

• F16C33/6681

  Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements · CPC title

• F16C29/0635

  whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end · CPC title