JPH11351252A - Linear bearing guide structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the sealing function by eliminating dusts, and to maintain the durability to the sliding resistance with the self-lubricity in a guide structure to guide the linear motion of a linear bearing to be used in a part with poor lubricating condition in a machine tool or the like. SOLUTION: A guide 10 to guide the linear motion of a linear bearing 1 to be used in an environmental condition difficult in lubrication is provided with a lip seal 4 joined with at least one of forward and rear surfaces in the direction of motion of the linear bearing 1, a self-lubricating guide body 6 formed of a urethane rubber foam with 30-80% lubricant impregnated therein is joined with an outer face side of the lip seal 4, and the guide body 4 is prevented from running out of the lubricant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear bearing (a bearing which performs a relative linear motion between two orbits in the rolling direction) which is mounted on a moving part of a machine tool or the like where lubrication conditions are difficult. And a guide structure for guiding the

[0002]

2. Description of the Related Art FIG. 2 is a perspective view showing a conventional example of a guide structure for guiding a linear motion of a linear bearing 1. FIG. Guide 2
Are guide bodies 3 each formed in the same gate-shaped shape.
, A lip seal 4 made of rubber material, and a reinforcing plate 5, and the reinforcing plate 5 is provided on the linear bearing 1 side. The guide 2 of such a laminated structure has the guide main body 3 formed of a rubber material or a resin material containing a lubricant in order to use it under environmental conditions where lubrication is difficult.

In the case of the conventional linear bearing guide structure shown in FIG. 2, the guide body 3 removes large dust at the front side of the lip seal 4 during the linear movement of the linear bearing 1 so that the lip seal 4 serves as a protection member. Of the lip portion 4a (see FIG. 3). However, if the self-lubricating property of the guide body 3 is deteriorated over a long period of use, the sliding resistance of the entire guide 2 is increased, and the lip seal 4 is damaged, resulting in a decrease in durability.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sealing function by eliminating dust when guiding the linear movement of a linear bearing used in a moving place with poor lubrication conditions in a machine tool or the like. An object of the present invention is to provide a linear bearing guide structure having lubricity and capable of maintaining durability against sliding resistance.

[0005]

SUMMARY OF THE INVENTION A linear bearing guide structure according to the present invention is a guide structure for guiding the linear motion of a linear bearing used under environmental conditions where lubrication is difficult. Has a lip seal joined to at least one side thereof, and a self-lubricating guide body made of a lubricant oil-containing urethane foam material is joined to the outer surface of the lip seal. As the guide body, a urethane foam rubber material containing a lubricant in an amount of 30 to 80% of the total weight of a lubricant is used.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a linear bearing guide structure according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a linear bearing guide structure according to the present embodiment. The linear bearing 1 shown in the conventional example is mounted at a movement location where lubrication conditions are difficult in a machine tool or the like, and the guide 10 relatively linearly guides the linear movement between the two tracks in the rolling direction of the linear bearing 1.

[0010] The guide 10 has a guide body 6 formed in a portal shape, and is interposed between the guide 10 and the linear bearing 1 as shown in FIG.
Has a lip seal 4a of the same shape as indicated by. The guide body 6 is used in an environment where lubrication is difficult.
It is formed of a foamed urethane rubber material having a self-lubricating property by containing a lubricant in an amount of 30 to 80% of the total weight.

Therefore, although the guide body 6 itself does not have a sealing property, it is possible to eliminate large dust during the linear movement of the linear bearing 1 and protect the lip portion 4a of the lip seal 4 from damage due to dust. it can. In addition, the lubricating property of the guide body 6 suppresses an increase in sliding resistance due to lack of oil, and can maintain the durability of the lip seal 4. Such a lip seal can be provided on at least one side of the front and rear surfaces in the movement direction of the linear bearing.

[0010]

The linear bearing guide structure according to the present invention has the following features.
Suitable for guiding the linear motion of linear bearings used in difficult lubricating environmental conditions, the sliding resistance is increased due to oil shortage by forming the guide body with self-lubricating urethane foam material. By suppressing
The lip seal, which is a sealing member, can be protected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a linear bearing guide structure according to the present invention.

FIG. 2 is a perspective view showing a conventional linear bearing guide structure.

FIG. 3 is a front view showing a lip seal in the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Linear bearing 4 Lip seal 6 Guide body 10 Guide

Claims (2)

[Claims] 1. A guide structure for guiding a linear motion of a linear bearing used in an environmental condition in which lubrication is difficult, comprising a lip seal joined to at least one of front and rear surfaces in a motion direction of the linear bearing. A linear bearing guide structure characterized in that a self-lubricating guide body made of a lubricant oil-containing urethane rubber material is joined to the outer surface side of the lip seal. 2. A lubricant is added to the urethane foam rubber material by 30 to 8 times.
The linear bearing guide structure according to claim 1, wherein the linear bearing guide structure contains oil of 0%.