JP2007232048A - Roller guide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller guide in which supply of a lubricating agent to a raceway is performed stably, which is suitable even in the case of mounting a plurality of sliders on one guide rail. <P>SOLUTION: Spherical surface rollers 3 are attached to four locations of a slider body 21 with roller shafts 4. A lubricating unit 5 is disposed between spherical surface rollers 3 opposed in the linear motion direction of the slider body 21. The lubricating unit 5 comprises a unit body 51, a lubricating component 52 composed of a lubricating agent-containing resin, a holder 53 of the lubricating component 52, and a coil spring 54. A tip end portion 52a of the lubricating component 52 has a perpendicular cross section in the linear motion direction that is a semicircle, the same as the cross section of the spherical surface rollers 3. The lubricating component 52 is pressed against the raceway 11 of the guide rail 1 by the coil spring 54. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes a slider, a guide rail, and a roller, the rotation axis of the roller is fixed to the slider, the track of the roller is formed in the guide rail, and one of the guide rail and the slider is relative to the other by the rotation of the roller. It relates to a roller guide that moves in a straight line (linear motion).

This type of roller guide is used in equipment that requires precise guidance and positioning, and an example thereof is described in Patent Document 1 below. In the roller guide described in this document, a cylindrical roller (follower) is used.
Further, a general linear guide has been proposed that includes a lubricant supply member in order to maintain a smooth linear motion for a long period of time (see Patent Documents 2 and 3, etc.).

  In Patent Document 2, a lubricant plate having a lubricant-containing member is provided at an end portion of the slider in the axial direction (linear motion direction) as a lubricant supply member that supplies a lubricant in sliding contact with a rolling surface of a guide rail of a linear guide. Provided. The lubricant-containing member of the lubrication plate is obtained by impregnating a porous plate material with lubricating oil, and is detachably attached to the axial end surface of the end cap of the slider. This lubricating plate needs to be removed and replaced when the impregnated lubricant is exhausted, or the lubricant-containing member needs to be replenished.

Patent Document 3 discloses a portion corresponding to a leg portion and a horizontal portion of a slider in order to supply the lubricant to the rolling surface of the guide rail continuously for a longer period of time than the method of Patent Document 2. A case in which a housing chamber for containing a lubricant is formed is disposed outside the lubricating plate, and the lubricant-containing member of the lubricating plate is brought into contact with the lubricant in the housing chamber. Are listed.
JP 2003-172350 A Japanese Patent Laid-Open No. 10-205534 JP 2000-145769 A

However, in a roller guide that requires high rigidity, a plurality of sliders are mounted on one guide rail. When a cylindrical roller is used as a roller for this slider, it is complicated to adjust the height between the plurality of sliders. Adjustment work is required.
In addition, in order to maintain a smooth linear motion of the roller guide for a long period of time, if a method of providing a lubricating plate having a lubricant-containing member at the end of the slider in the linear motion direction is adopted, the linear motion direction of the slider is equivalent to the amount of the lubrication plate. Longer dimensions. This shortens the stroke of the slider. Further, when this method is adopted, when a plurality of sliders are mounted on one guide rail, the stroke of each slider needs to be adjusted, and the degree of freedom in design is reduced.

  An object of the present invention is to provide a slider, a guide rail, and a roller, a rotation shaft of the roller is fixed to the slider, a track of the roller is formed on the guide rail, and one of the guide rail and the slider is opposed to the other by the rotation of the roller. It is an object of the present invention to provide a relatively linearly moving roller guide that is stably supplied with a lubricant to a track and that is suitable for mounting a plurality of sliders on one guide rail.

  In order to solve the above-described problems, the present invention includes a slider, a guide rail, and a roller, the rotation shaft of the roller is fixed to the slider, a track of the roller is formed on the guide rail, and the guide rail and the slider are rotated by the rotation of the roller. In the roller guide in which one of the rollers moves linearly relative to the other, the roller is a spherical roller (a roller having a spherical portion in contact with the track), and is paired on both sides of the guide rail and is a slider. A lubricating part made of a resin containing a lubricant is attached between spherical rollers arranged at both ends in the linear motion direction of the slider and opposed to each other in the linear motion direction of the slider so as to come into contact with the track of the guide rail. Providing a featured roller guide.

Since this roller guide uses a spherical roller, when a plurality of sliders are mounted on one guide rail, adjustment work for adjusting the height between the plurality of sliders becomes unnecessary.
In addition, the lubrication parts made of resin containing lubricant are mounted between the spherical rollers facing each other in the linear motion direction of the slider so as to contact the track of the guide rail. The dimensions do not change.

  The lubrication component has a cross section perpendicular to the linear motion direction of the track side portion formed in the same manner as the cross section of the spherical roller, and the lubrication component is attached in a state of being biased toward the track by a spring. It is preferable that As a result, the frictional resistance against the track of the lubrication part can be reduced, and the lubricant comes out of the lubricant-containing resin, so that even when the lubrication part becomes small, it comes into contact with the track of the guide rail by biasing by a spring. State is maintained.

  According to the roller guide of the present invention, the lubricant is stably supplied to the track, which is also suitable when a plurality of sliders are mounted on one guide rail.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a plan view of a roller guide according to this embodiment, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, and FIG. FIG. 5 shows a cross section perpendicular to the linear motion direction of the roller guide and corresponding to the BB cross section of FIG. FIG. 4 corresponds to the CC cross section of FIG.

The roller guide includes a guide rail 1, a slider 2, and a spherical roller 3. The guide rail 1 is formed with a track 11 of the spherical roller 3 and a groove 12 disposed behind the track 11. The groove 12 is formed for the purpose of clearance when the track 11 is ground.
The slider 2 includes a slider body 21, an end cap 22, and a side seal 23. Spherical rollers 3 are attached by roller shafts 4 at four locations on the slider body 21. Two pairs of four spherical rollers 3 are paired so as to be in contact with the track 11 from both sides of the guide rail 1, and a pair is arranged at both ends of the slider body 21 in the linear motion direction.

The lubrication unit 5 is disposed between the spherical rollers 3 that face each other in the linear motion direction of the slider body 21.
The lubrication unit 5 includes a unit main body 51, a lubrication component 52 made of a lubricant-containing resin, a holder 53 for the lubrication component 52, and a coil spring 54. The unit main body 51 includes a space 51a in which the holder 53 holding the lubricating component 52 is disposed, a through hole 51b through which the shaft portion of the screw 6 is passed, a countersink portion 51c that houses the head of the screw 6, and a coil spring 54. A recessed portion 51d to be disposed is formed.

The lubrication component 52 has a cross section perpendicular to the linear movement direction of the distal end portion 52a in the same semicircular shape as that of the spherical roller 3, and a base end portion 52b is held by a U-shaped holder 53. Yes. A coil spring 54 is disposed between the concave portion 51 d of the unit main body 51 and the holder 53 in such a direction as to press the lubricating component 52 against the track 11 of the guide rail 1.
The slider main body 21 is also formed with a female screw 21a for screwing a male screw of the screw 6 and a female screw 21b for attaching the slider 2 to a member to be attached.

According to the roller guide of this embodiment, since the spherical roller 3 is used, when the plurality of sliders 2 are mounted on one guide rail 1, a plurality of sliders are used, as in the case of using a cylindrical roller. Adjustment work for adjusting the height between the two is unnecessary.
In addition, since the lubrication component 52 is attached so as to contact the track 11 of the guide rail 1 between the spherical rollers 3 arranged opposite to each other along the linear movement direction of the slider 2, the lubrication component 52 is attached to the slider 2. The linear direction dimension does not change. Further, since the tip 52a of the lubricating component 52 is formed in the same cross section as the spherical roller 3, the frictional resistance of the lubricating component 52 with respect to the track 11 can be reduced.

  In addition, since the lubrication component 52 made of the lubricant-containing resin is attached in a state of being biased toward the track 11 by the coil spring 54, the lubricant comes out from the lubricant-containing resin. Even when becomes smaller, the state of being in contact with the track 11 of the guide rail 1 by the biasing force of the coil spring 54 is maintained. Further, since the lubrication component 52 and the coil spring 54 are unitized and can be easily attached to and detached from the slider body 21 by attaching / detaching the bolt 6, the lubrication component 52 can be easily replaced.

In addition, as shown in FIG. 6, the slider 2 of this embodiment may be used in combination with a normal linear guide slider 20 by mounting a plurality of sliders 2 and 20 on one guide rail 1. Good.
In a general linear guide, one of the guide rail and the slider moves linearly relative to the other due to rolling of the steel ball, so that a collision sound between the steel balls is generated. Then, since there is no collision between such steel balls, the operation sound is quiet.

  In a general roller guide using a cylindrical roller, the roller is in line contact with the track of the guide rail. However, in the roller guide of the present invention using a spherical roller, a maximum of 8 points (2 per roller). Point contact at point). Therefore, even when pre-loading is applied using an oversized roller for high accuracy, the friction can be reduced and the dynamic frictional force can be reduced, so that the movement can be made smooth.

It is a top view which shows the roller guide corresponded to embodiment of this invention. It is a side view which shows the roller guide corresponded to embodiment of this invention. It is a front view which shows the roller guide corresponded to embodiment of this invention. It is AA sectional drawing of FIG. It is a cross section perpendicular | vertical to the linear motion direction of the roller guide corresponded to embodiment of this invention, Comprising: It is a figure corresponding to the BB cross section of FIG. It is a top view which shows the example which used the slider of embodiment of this invention in combination with the slider for normal linear guides.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide rail 11 Track 12 Groove 2 Slider 21 Slider main body 21a Female screw 21b Female screw 22 End cap 23 Side seal 3 Spherical roller 4 Roller shaft 5 Lubrication unit 51 Main body 51a Space in which the holder is disposed 51b Through hole 51c Countersink part 51d Recessed part 52 Lubrication Component 52a Tip portion of lubrication component 52b Base end portion of lubrication component 53 Holder 54 Coil spring 6 Screw

Claims (2)

A slider, a guide rail, and a roller are provided. The rotation axis of the roller is fixed to the slider, and a track of the roller is formed on the guide rail. One of the guide rail and the slider moves linearly relative to the other by the rotation of the roller. In the roller guide,
The rollers are spherical rollers, arranged in pairs on both sides of the guide rail, and arranged in pairs on both ends in the linear motion direction of the slider,
A roller guide characterized in that a lubrication component made of a lubricant-containing resin is attached between spherical rollers arranged to face each other in the linear motion direction of the slider so as to come into contact with the track of the guide rail. The lubricating component is formed such that a cross section perpendicular to the linear motion direction of the track side portion is the same as the cross section of the spherical roller,
The roller guide according to claim 1, wherein the lubricating component is attached in a state of being biased toward the track by a spring.

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