WO2015098082A1

WO2015098082A1 - Linear motion guide device

Info

Publication number: WO2015098082A1
Application number: PCT/JP2014/006376
Authority: WO
Inventors: 匠中川; 鉄也工藤
Original assignee: 日本精工株式会社
Priority date: 2013-12-26
Filing date: 2014-12-22
Publication date: 2015-07-02
Also published as: JP6222243B2; JPWO2015098082A1; DE212014000235U1

Abstract

Provided is a linear motion guide device which is maintained in a good lubricated condition for a long period of time. A linear motion guide device is provided with lubricating members (30) located between the end caps (2B) of a slider (2) and side seals (5), the lubricating members (30) being in sliding contact with the rolling body raceway surfaces (10) of a guide rail (1) and supplying lubricant to the rolling body raceway surfaces (10). The lubricating members (30) are provided with lubricant supply sections (32) which face the rolling body raceway surfaces (10) and from which the lubricant oozes. The lubricant supply sections (32) are formed in a stepped shape and are each constituted by: an outer end-side portion (32a) which are in contact with a rolling body raceway surface (10); an intermediate portion (32b) which is disposed on the inside of the outer end-side portion (32a) and which faces the rolling body raceway surface (10) at a position located at a distance from the rolling body raceway surface (10); and an inner end-side portion (32c) which is disposed on the inside of the intermediate portion (32b) and which faces the rolling body raceway surface (10) at a position located further from the rolling body raceway surface (10) than the intermediate portion (32b).

Description

Linear motion guide device

The present invention relates to a linear motion guide device.

Some conventional linear motion guide devices include a lubricant that contains a lubricant and supplies the lubricant to the raceway surface of the rolling element. For example, in a linear motion guide device disclosed in Patent Document 1, a lubricating member that gradually supplies a lubricant to a seal portion of a seal device is attached between the seal device and an end portion of a slider. Further, in the linear motion guide device disclosed in Patent Document 2, a lubrication member that supplies a lubricant in sliding contact with the raceway surface of the guide rail is attached to an end portion in the axial direction of the slider.

Japanese Patent No. 4069262 JP 2005-207497 A

However, the lubricating member gradually exudes the lubricant from the contact portion with the raceway surface and supplies it to the raceway surface. However, a large amount of the lubricant exudes in a short time in the initial stage when sufficient lubricant is retained. Therefore, there is a possibility that more lubricant than the amount necessary for lubrication is supplied to the raceway surface. For this reason, there is a possibility that the amount of the lubricant retained will decrease within a short period of time.
Also, when a large amount of lubricant is released and the remaining amount is low, only a small amount of lubricant oozes out, so that less lubricant than the amount required for lubrication is supplied to the raceway surface, which may result in insufficient lubrication. was there. Therefore, there is a problem that it is difficult to maintain a good lubrication state for a long period of time.
Therefore, an object of the present invention is to solve the above-described problems of the prior art and to provide a linear motion guide device capable of maintaining a good lubrication state over a long period of time.

In order to solve the above-described problems, a linear motion guide device according to an aspect of the present invention includes a guide rail, a slider, and a plurality of rolling elements, and the guide rail and the slider are located at positions facing each other. Each of which has a raceway surface that forms a rolling passage of the rolling element, the both raceway surfaces extend in the longitudinal direction of the guide rail, and the rolling element is disposed in the rolling passage, In the linear motion guide device in which the slider is guided by the guide rail and moves in the longitudinal direction through the rolling of the rolling element, the slider is on the end of the moving direction and on the outer surface of the guide rail. A lubrication member is provided that slidably contacts and supplies a lubricant to the outer surface of the guide rail, and the lubrication member includes a lubricant supply section that exudes the lubricant facing the outer surface of the guide rail. The agent supply unit And having a contact portion contacting the outer surface of the inner rail, and a separation portion facing the outer surface of the guide rail away from the outer surface of the guide rail.

In this linear motion guide device, the contact portion may have a parallel surface that is parallel to the outer surface of the guide rail and that contacts the outer surface of the guide rail.
In this linear motion guide device, the separation portion may have at least one plane that is parallel to the outer surface of the guide rail and that forms a step with respect to the contact portion.
Furthermore, in this linear motion guide device, the separation portion may have an inclined surface that is inclined with respect to the outer surface of the guide rail.
Furthermore, in this linear motion guide device, the separation portion may be a recess provided in the contact portion.

The linear motion guide device of the present invention can maintain a good lubrication state for a long period of time.

It is a side view which shows the structure of one Embodiment of the linear guide apparatus which concerns on this invention. It is the front view and sectional drawing which looked at the linear guide apparatus of FIG. 1 from the edge part side of the longitudinal direction of a guide rail. It is the front view which looked at the lubrication member and the lubrication member container from the edge part side of the longitudinal direction of a guide rail. FIG. 4 is a cross-sectional view taken along the line AA of the lubricating member of FIG. It is a conceptual diagram explaining the relationship between the abrasion of a lubricating member, and the amount of exudation of a lubricant. It is a figure which shows the modification of a lubricating member. It is a figure which shows another modification of a lubricating member. It is a figure which shows another modification of a lubricating member.

An embodiment of a linear motion guide device according to the present invention will be described in detail with reference to FIGS. 2 is a view of the linear motion guide device of FIG. 1 as viewed from the end side in the longitudinal direction of the guide rail. The right side portion from the center is a front view, and the left side portion is orthogonal to the longitudinal direction of the guide rail. It is sectional drawing at the time of cut | disconnecting by a plane.
In the drawings referred to in the following description, the same or corresponding parts are denoted by the same reference numerals. Further, in the following description, “cross section” means a cross section when cut along a plane perpendicular to the longitudinal direction of the guide rail unless otherwise specified. Further, in the following description, terms indicating directions such as “up”, “down”, “left”, and “right” mean the respective directions in FIG. 2 for convenience of description unless otherwise specified. It is.

A slider 2 having a substantially U-shaped cross section is assembled on a guide rail 1 having a substantially square cross section extending in a straight line so as to be movable in the longitudinal direction of the guide rail 1.
On the left and

right side surfaces

1a, 1a of the guide rail 1, recesses extending in the longitudinal direction of the guide rail 1 are formed. In these recesses, two upper and lower inclined planes extending in the longitudinal direction are formed so as to be substantially V-shaped, and the four left and right inclined planes are respectively formed on the rolling element raceway surface 10 (the present invention). Corresponding to the raceway surface).
The slider 2 includes a plate-like body portion 7 along the upper surface 1b of the guide rail 1, and two

leg portions

6 and 6 extending downward from the left and right side portions of the body portion 7 along the side surface 1a. Since the angle formed by the body portion 7 and the

leg portions

6 and 6 is substantially a right angle, the cross-sectional shape of the slider 2 is substantially U-shaped along the upper surface 1b and the left and

right side surfaces

1a and 1a of the guide rail 1. . The slider 2 is movably mounted on the guide rail 1 so that the guide rail 1 is sandwiched between the

leg portions

6 and 6.

Such a slider 2 includes a slider body 2A and

end caps

2B and 2B that are detachably attached to both ends of the slider body 2A (both ends in the moving direction of the slider 2). Further,

side seals

5 and 5 having substantially the same cross-sectional shape as the slider 2 are attached to both ends of the slider 2 (outer end surfaces of the end caps 2B in the moving direction). The

side seals

5 and 5 are in sliding contact with the outer surfaces (the upper surface 1b and the

side surfaces

1a and 1a) of the guide rail 1, and face the end side in the moving direction in the gap opening between the guide rail 1 and the slider 2. The parts to be sealed are designed to be sealed.
An under seal (not shown) is attached to the lower portion of the slider 2 to seal the portion facing the lower surface side of the slider 2 in the opening of the gap between the guide rail 1 and the slider 2. The side seals 5 and 5 and the under seals seal the entire opening to prevent foreign matter from entering the gap from the outside and leakage of the lubricant from the gap to the outside. Yes.

Furthermore, convex portions having a substantially triangular cross section extending in the longitudinal direction are formed on the inner side surfaces of the left and

right leg portions

6 and 6 of the slider body 2A so as to protrude toward the guide rail 1. On the convex portions, two upper and lower inclined planes extending in the longitudinal direction are formed so as to be substantially V-shaped, and the total of four left and right inclined planes are the rolling element tracks of the guide rail 1, respectively. The rolling

element raceway surfaces

11, 11, 11, and 11 (corresponding to the raceway surface that is a constituent element of the present invention) facing the

surfaces

10, 10, 10, and 10 are configured. That is, the number of rolling element raceway surfaces 10 of the guide rail 1 and the number of rolling element raceway surfaces 11 of the slider 2 are the same.

And between the rolling

element raceway surface

10, 10, 10, 10 of the guide rail 1 and the rolling

element raceway surface

11, 11, 11, 11 of the slider 2, the rolling passage 13 of the rolling element of a substantially rectangular cross-sectional shape, 13, 13, and 13 are formed, respectively, and these

rolling passages

13, 13, 13, and 13 extend in the longitudinal direction. A plurality of cylindrical rollers 3 that are rolling elements are slidably loaded in the rolling passage 13, and the slider 2 is guided to the guide rail 1 through the rolling of these cylindrical rollers 3, and the above described. It moves in the longitudinal direction.
Furthermore, the slider 2 has a substantially cross-sectional shape penetrating in the longitudinal direction at the upper and lower portions of the thick portions of the left and

right leg portions

6 and 6 of the slider body 2A in parallel to the

rolling passages

13, 13, 13, and 13. Return

passages

14, 14, 14, and 14 each having a rectangular straight hole are provided. For example, if a tubular member 22 having an inner surface with a cross-sectional shape along the shape of the cylindrical roller 3 is inserted into the hole 20 formed in the both leg portions 6 and extending in the longitudinal direction, the inner surface of the tubular member 22 is formed. A return passage 14 is constituted by the straight hole.

On the other hand, the end cap 2B is made of a molded product of a resin material, for example, and has a cross-sectional shape substantially the same as that of the slider body 2A. Further, on both the left and right sides of the back surface of the end cap 2B (the contact surface with the slider body 2A), a half-doughnut-shaped direction change path (not shown) is formed in two upper and lower stages. In addition, the cross-sectional shape of this direction change path is a cross-sectional shape at the time of cut | disconnecting by the plane orthogonal to the continuous direction of a direction change path.
When the end cap 2B is attached to the slider body 2A, the rolling passage 13 and the return passage 14 are communicated with each other by the direction changing path. These return passages 14 and the direction change paths at both ends constitute a rolling element return path for sending the cylindrical roller 3 from the end point of the rolling path 13 to the starting point (the same number of rolling element return paths as the rolling path 13 is provided). ), And the rolling passage 13 and the rolling element return path constitute a substantially circular circulation path. The substantially annular circulation path is formed on both the left and right sides of the guide rail 1.

When the slider 2 assembled to the guide rail 1 moves in the longitudinal direction along the guide rail 1, the cylindrical roller 3 loaded in the rolling passage 13 is guided while rolling in the rolling passage 13. It moves in the same direction as the slider 2 with respect to the rail 1. When the cylindrical roller 3 reaches the end point of the rolling passage 13, it is scooped up from the rolling passage 13 and sent to the direction change path. The cylindrical roller 3 that has entered the direction change path is U-turned and introduced into the return path 14, and reaches the opposite direction change path through the return path 14. The cylindrical roller 3 makes a U-turn again and returns to the starting point of the rolling passage 13 and repeats the circulation in such a circulation path infinitely.

The linear motion guide device includes a lubrication member 30 that is in sliding contact with the rolling element raceway surface 10 of the guide rail 1 and supplies a lubricant to the rolling element raceway surface 10. The lubricating member 30 is disposed at both ends of the slider 2 in the moving direction, for example, between the end cap 2 </ b> B and the side seal 5. The lubricating member 30 may be in sliding contact with only the rolling element raceway surface 10, but may be in sliding contact with the outer surface (side surface 1a or upper surface 1b) of the guide rail 1 other than the rolling element raceway surface 10. . For example, the outer surface of the guide rail 1 including the rolling element raceway surface 10 may be slidably contacted. If the lubricant released from the lubricating member 30 is supplied to the rolling element raceway surface 10, the rolling element raceway surface 10. You may make it slidably contact with the outer surface of the guide rail 1 except for.

The lubricating member 30 is made of, for example, felt containing a lubricant, a resin molded body, and a porous body, and is formed in a shape (substantially U-shaped in cross section) substantially the same as that of the slider 2. And it is attached to the slider 2 in the state accommodated in the lubricating member container 31 comprised with resin, a metal, etc. and formed in the shape (substantially U-shaped cross section) substantially the same as the slider 2. FIG.
On the inner side surface of the lubricating member 30 having a substantially U-shaped cross section, a lubricant supply portion 32 from which the lubricant exudes is formed facing the rolling element raceway surface 10 of the guide rail 1. The discharged lubricant is supplied to the rolling element raceway surface 10 so that the rolling element raceway surface 10 which is a lubricated portion is lubricated. This lubricant is transferred from the rolling element raceway surface 10 to the other lubricated parts such as the rolling element raceway surface 11 and the cylindrical roller 3 as the slider 2 moves, and is used for lubrication.

The type of lubricant is not particularly limited, but general lubricating oil or grease can be used.
The felt material constituting the lubricating member 30 includes, for example, wool, aramid fiber, nylon fiber, glass fiber, cellulose fiber, polyester fiber, polyether fiber, polyolefin fiber (for example, polyethylene fiber, polypropylene fiber), rayon fiber. Can be given.
Furthermore, examples of the resin constituting the resin molded body and the porous body include polyolefin (for example, polyethylene, polypropylene), aramid, nylon, polyester, and polyether.

Next, the lubricant supply unit 32 formed on the inner surface of the lubricating member 30 will be described in detail. The shape of the lubricant supply part 32 facing the rolling element raceway surface 10 is formed in a step shape as shown in FIG. That is, the portion 32 a on the outer end side in the moving direction of the lubricant supply part 32 protrudes most inward toward the guide rail 1 and is in contact with the rolling element raceway surface 10. The contact surface 41 of the outer end side portion 32 a that contacts the rolling element raceway surface 10 is a parallel surface that is parallel to the rolling element raceway surface 10.
An intermediate portion 32b facing the rolling element raceway surface 10 at a position away from the rolling element raceway surface 10 is disposed inside the outer end side portion 32a in the moving direction. The facing surface 42 of the intermediate portion 32 b that faces the rolling element raceway surface 10 is a parallel surface that is parallel to the rolling element raceway surface 10.

Further, an inner end side portion 32c facing the rolling element raceway surface 10 is disposed at a position farther from the rolling element raceway surface 10 than the intermediate portion 32b, inside the intermediate portion 32b in the moving direction. The facing surface 42 of the inner end side portion 32 c that faces the rolling element raceway surface 10 is a parallel surface that is parallel to the rolling element raceway surface 10.
As described above, the lubricant supply section 32 has three

planes

41, 42, and 42 that are parallel to the rolling element raceway surface 10, and is formed in a step shape. The intermediate portion 32b is formed on the outer end side portion 32a. On the other hand, a step is formed, and the inner end side portion 32c forms a step with respect to the intermediate portion 32b.
The outer end side portion 32a that contacts the rolling element raceway surface 10 corresponds to a contact portion that is a constituent element of the present invention, and an intermediate portion 32b that faces the rolling element raceway surface 10 at a position away from the rolling element raceway surface 10 and The inner end side portion 32c corresponds to a separation portion that is a constituent feature of the present invention.

In the present embodiment, the lubricant supply unit 32 has three

planes

41, 42, 42 that are parallel to the rolling element raceway surface 10, and has a shape having two steps. It may have a shape having one or three or more steps and having one or three or more planes.
In the present embodiment, the side surface of the outer end side portion 32a and the plane 42 of the intermediate portion 32b, and the side surface of the intermediate portion 32b and the plane 42 of the inner end side portion 32c intersect at right angles. However, the corner formed by the intersection may be chamfered or rounded (as defined in Japanese Industrial Standard JIS B0701). Thereby, the stress concentration at the corners is alleviated when the lubricant supply part 32 and the rolling element raceway surface 10 of the guide rail 1 are in sliding contact.

In the initial stage of use of the linear motion guide device, the outer end side portion 32a of the lubricant supply section 32 is in contact with the rolling element raceway surface 10, and the intermediate portion 32b and the inner end side portion 32c are not in contact with the rolling element raceway surface 10. In contact. When the slider 2 moves, the outer end side portion 32a of the lubricant supply portion 32 comes into sliding contact with the rolling element raceway surface 10, so that the lubricant oozes out from the outer end side portion 32a of the lubricant supply portion 32 due to capillary action. It is supplied to the moving body track surface 10. The lubricant does not ooze out from the intermediate portion 32b and the inner end portion 32c that are not in contact with the rolling element raceway surface 10.
Since the lubricating member 30 holds a large amount of lubricant in the initial use of the linear motion guide device, the leaching speed per unit area of the lubricant from the lubricating member 30 is large, and an excessive amount of lubricant is caused by the rolling element track. Although it is easy to be supplied to the surface 10, in this embodiment, since the contact area between the lubricating member 30 and the rolling element raceway surface 10 is small, the amount of the lubricant supplied from the lubricant supply unit 32 is controlled and is necessary for lubrication. A sufficient appropriate amount of lubricant is supplied to the rolling element raceway surface 10 (see FIG. 5A).

As the linear motion guide device is used, the outer end portion 32a is worn by sliding contact with the rolling element raceway surface 10. The lubricating member container 31 has elasticity, and pushes the upper part of the lubricating member 30 outward from the central part in the left-right direction, so that the lubricant supply part 32 at the lower part of the lubricating member 30 is moved by the action. It can be pressed against the side surface 1a of the guide rail 1 from both the left and right sides (see arrows in FIG. 3).
Therefore, the outer end side portion 32a of the lubricant supply part 32 is pressed against the rolling element raceway surface 10 even if worn, and thus is further worn as the linear motion guide device is used. Then, as wear of the outer end portion 32a proceeds, the outer end portion 32a and the intermediate portion 32b become flush with each other (see FIG. 5B), and the intermediate portion 32b also contacts (slids) the rolling element raceway surface 10. The lubricant oozes out from the intermediate portion 32b.

Then, since the contact area between the lubricating member 30 and the rolling element raceway surface 10 becomes large, the lubricant easily oozes out from the lubricating member 30, but when the intermediate portion 32 b comes into contact with the rolling element raceway surface 10, the lubricating member Since the amount of lubricant retained by 30 is reduced as compared with the initial use of the linear motion guide device, the leaching rate per unit area of the lubricant from the lubricating member 30 is reduced. Therefore, the increase in the contact area is offset, and the amount of lubricant supplied from the lubricant supply unit 32 does not change greatly, and an appropriate amount of lubricant necessary and sufficient for lubrication is supplied to the rolling element raceway surface 10. The state is maintained (see (b) of FIG. 5).

Further, when the linear motion guide device is used, wear of the outer end side portion 32a and the intermediate portion 32b proceeds by sliding contact with the rolling element raceway surface 10, and the inner end side portion 32c becomes the outer end side portion 32a and the intermediate portion. It becomes the same plane as 32b (see FIG. 5C), and the inner end side portion 32c also comes into contact (sliding contact) with the rolling element raceway surface 10.
Then, since the contact area between the lubricating member 30 and the rolling element raceway surface 10 is further increased, the lubricant is more likely to ooze out from the lubricating member 30, but when the inner end side portion 32c comes into contact with the rolling element raceway surface 10. Since the amount of the lubricant retained by the lubricating member 30 is small, the leaching rate per unit area of the lubricant from the lubricating member 30 is small. Therefore, the increase in the contact area is offset, and the amount of lubricant supplied from the lubricant supply unit 32 does not change greatly, and an appropriate amount of lubricant necessary and sufficient for lubrication is supplied to the rolling element raceway surface 10. The state is maintained (see (c) of FIG. 5).

As described above, the amount of lubricant retained by the lubricant member 30 decreases with the passage of time of use of the linear motion guide device, and the contact area between the lubricant supply portion 32 of the lubricant member 30 and the rolling element raceway surface 10 is reduced. Is increasing. Therefore, the amount of the lubricant supplied from the lubricant supply unit 32 to the rolling element raceway surface 10 is appropriately adjusted and maintained at an appropriate amount necessary and sufficient for lubrication. Further, since excessive lubricant is not released from the lubricating member 30, there is no possibility that the amount of lubricant held in the lubricating member 30 will be exhausted within a short period of time. Therefore, the linear motion guide device of the present embodiment maintains a good lubrication state for a long period of time. Such a linear motion guide device of the present embodiment can be suitably used for, for example, an injection molding machine and a machine tool.

In addition, this embodiment shows an example of this invention and this invention is not limited to this embodiment. For example, in the present embodiment, the lubricant supply part 32 formed in a stepped shape is made of an integral member as shown in FIG. 4, but may be made of a plurality of members. That is, as shown in FIG. 6, the lubricant supply unit 32 may be configured by laminating plate-like members.
Further, the shape of the lubricant supply part 32 may be as shown in FIG. That is, the portion 32 a on the outer end side in the moving direction of the lubricant supply part 32 protrudes most inward toward the guide rail 1 and is in contact with the rolling element raceway surface 10. The contact surface of the outer end side portion 32 a that is in contact with the rolling element raceway surface 10 is a parallel surface that is parallel to the rolling element raceway surface 10.

And the inner end side part 32c which opposes the rolling element track surface 10 in the position away from the rolling element track surface 10 is distribute | arranged inside the said moving direction of the outer end side part 32a. The facing surface of the inner end side portion 32 c that faces the rolling element raceway surface 10 is an inclined surface that is inclined with respect to the rolling element raceway surface 10. The inclined surface is inclined so that a portion adjacent to the outer end side portion 32a is closest to the rolling element raceway surface 10 and is separated from the rolling element raceway surface 10 as the distance from the outer end side portion 32a increases in the moving direction. The inclined surface is not limited to a flat surface but may be a curved surface. Similarly to the case of FIG. 6, the outer end side portion 32a and the inner end side portion 32c may be separate members.
As soon as the outer end side portion 32a wears out due to sliding contact with the rolling element raceway surface 10, the inner end side portion 32c begins to wear away. As the inner end side portion 32c wears out, the lubricating member 30 and the rolling element raceway surface 10 The contact area gradually increases.
In addition, the outer end side portion 32a that contacts the rolling element raceway surface 10 corresponds to a contact portion that is a constituent element of the present invention, and an inner end that faces the rolling element raceway surface 10 at a position away from the rolling element raceway surface 10. The side portion 32c corresponds to a separation portion that is a constituent feature of the present invention.

Furthermore, the shape of the lubricant supply part 32 may be as shown in FIG. That is, the lubricant supply unit 32 includes a parallel surface 44 that is in contact with the rolling element raceway surface 10 and parallel to the rolling element raceway surface 10, and one or more (two in the example of FIG. ) Recesses 32e are formed. The shape of the opening part of the recessed part 32e is not specifically limited, For example, it can be set as a circle, an ellipse, and a polygon (a triangle, a square, etc.). Further, the bottom surface of the recess 32e may be a parallel surface parallel to the rolling element raceway surface 10 as shown in FIG. 8, or may be a concave surface. Furthermore, the shape of the recess 32e may be a columnar shape (for example, a columnar shape or a prismatic shape) as shown in FIG. 8, but may be a cone shape (for example, a conical shape or a pyramid shape), or a hemisphere. It may be a shape.
Further, when the shape of the recess 32e is a columnar shape, the inner surface and the bottom surface of the recess 32e intersect at right angles, and the corner formed by the intersection is a square, but is formed by the intersection. The corners may be chamfered or rounded (specified in Japanese Industrial Standard JIS B0701). Thereby, the stress concentration at the corners is alleviated when the lubricant supply part 32 and the rolling element raceway surface 10 of the guide rail 1 are in sliding contact.

When the linear motion guide device is used, the sliding contact with the rolling element raceway surface 10 causes wear of the portion 32d having the parallel surface 44 in contact with the rolling element raceway surface 10, and the bottom surface of the recess 32e becomes the rolling element raceway surface 10. The portion 32d having the parallel surface 44 that comes into contact with the flat surface is in the same plane, and the bottom surface of the recess 32e is also in contact (sliding contact) with the rolling element track surface 10. Thereby, the contact area of the lubricating member 30 and the rolling element raceway surface 10 becomes large.
The portion 32d having the parallel surface 44 that contacts the rolling element raceway surface 10 corresponds to a contact portion that is a constituent element of the present invention, and faces the rolling element raceway surface 10 at a position away from the rolling element raceway surface 10. The concave portion 32e corresponds to a separation portion that is a constituent feature of the present invention.
The type of roller is not limited to a cylindrical roller, and other types of rollers such as a tapered roller and a needle roller can be used. The rolling elements are not limited to rollers, but may be balls. When the rolling element is a ball, the rolling element raceway surfaces 10 and 11 are not flat surfaces but are groove surfaces having a substantially arc-shaped cross section or a substantially V-shaped cross section, and the rolling passage 13 is substantially circular in cross section.

Further, when the rolling element is a roller, the number of rolling element raceway surfaces 10 and 11 provided in the guide rail 1 and the slider 2 may be plural, not limited to two on one side, but on three sides on one side. Also good. When the rolling element is a ball, the number of rolling element raceway surfaces 10 and 11 provided in the guide rail 1 and the slider 2 may be one (one on one side) or plural (one on two or more).
Furthermore, the present invention is also applied to a linear motion guide device of a type in which a slider having a substantially rectangular cross section is assembled inside a guide rail having a substantially U-shaped cross section extending in the axial direction so as to be movable in the axial direction. Can be applied.

DESCRIPTION OF SYMBOLS 1 Guide rail

1a Side surface

1b Upper surface 2 Slider 3 Cylindrical roller 10 Rolling body raceway surface 11 Rolling body raceway surface 13 Rolling path 30 Lubrication member 32 Lubricant supply part 32a Outer end side part 32b Middle part 32c Inner end side part 32d Rolling element Part having parallel surface in contact with raceway surface 32e Concave portion 44 Parallel surface

Claims

A guide rail, a slider, and a plurality of rolling elements,
The guide rail and the slider each have a raceway surface that forms a rolling passage of the rolling element at a position facing each other,
The both raceway surfaces extend in the longitudinal direction of the guide rail,
The rolling element is disposed in the rolling passage;
In the linear motion guide device in which the slider is guided by the guide rail and moves in the longitudinal direction through the rolling of the rolling element in the rolling path,
The slider includes a lubrication member at an end portion in a moving direction thereof for supplying a lubricant to the outer surface of the guide rail in sliding contact with the outer surface of the guide rail,
The lubrication member includes a lubricant supply portion from which the lubricant exudes facing the outer surface of the guide rail, and the lubricant supply portion includes a contact portion that contacts the outer surface of the guide rail, and the guide rail. A linear guide device comprising: a separation portion facing the outer surface of the guide rail at a position away from the outer surface.
The linear motion guide device according to claim 1, wherein the contact portion has a parallel surface that is parallel to the outer surface of the guide rail and that contacts the outer surface of the guide rail.
The linear motion guide device according to claim 1 or 2, wherein the separating portion has at least one plane that is parallel to the outer surface of the guide rail and that forms a step with respect to the contact portion.
The linear motion guide device according to claim 1 or 2, wherein the separating portion has an inclined surface inclined with respect to an outer surface of the guide rail.
The linear motion guide device according to claim 1, wherein the separation portion is a recess provided in the contact portion.