JP2015165160A - Linear motion guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear motion guide device that hardly causes damage such as wear of rolling elements and raceway surfaces.SOLUTION: A linear motion guide device comprises: lubricating members 20 including a lubricant; first lubricant supply parts 21 that supply the lubricant of the lubricating members 20 to outer surfaces including rolling element raceway grooves 10 of a guide rail 1; and second lubricant supply parts 22 that supply the lubricant of the lubricating members 20 to rolling elements 3 in turnaround passages 15.

Description

  The present invention relates to a linear motion guide device.

Examples of conventional linear motion guide devices include the following. A slider having a substantially U-shaped cross-section is assembled on a guide rail having a substantially rectangular cross-section extending in a straight line so as to be movable in the longitudinal direction of the guide rail. A raceway surface extending in the longitudinal direction is formed on the outer surface of the guide rail.
The slider is composed of a slider body and end caps that are detachably attached to both ends of the slider body (both ends in the direction of movement of the slider). A raceway surface facing the raceway surface is formed.

A rolling path of the rolling element is formed between the track surface of the guide rail and the track surface of the slider, and the rolling path extends in the longitudinal direction. A plurality of rolling elements (for example, balls and rollers) are slidably loaded in the rolling path, and the slider is guided by the guide rail through the rolling of the rolling elements in the rolling path. It moves in the longitudinal direction.
Further, the slider includes a return passage made of a straight hole penetrating in the longitudinal direction in parallel with the rolling passage inside the slider body. On the other hand, a direction changing path that curves in a half donut shape is formed on the back surface of the end cap (the contact surface with the slider body). When this end cap is attached to the slider body, the rolling passage and the return passage are communicated with each other by the direction changing passage. These return passages and the direction change paths at both ends constitute a rolling element conveyance path for sending the rolling elements from the end point of the rolling passage to the starting point, and the rolling passage and the rolling element conveyance path constitute a substantially annular circulation path. Is done.

  When the slider assembled to the guide rail moves in the longitudinal direction along the guide rail, the rolling elements loaded in the rolling passage are moved in the rolling passage with respect to the guide rail. Move in the same direction. And when a rolling element reaches the end point of a rolling passage, it will be scooped up from a rolling passage and will be sent to a direction change path. The rolling element that has entered the direction change path makes a U-turn and is introduced into the return path, and reaches the opposite direction change path through the return path. Here, the U-turn is made again to return to the starting point of the rolling passage, and such circulation in the circulation path is repeated infinitely.

In such a linear motion guide device, a lubricant such as lubricating oil and grease is supplied to the rolling elements and the raceway surface in order to suppress the occurrence of damage such as wear on the rolling elements and the raceway surface. Various techniques for supplying the lubricant to the rolling elements and the raceway surface are known. However, Patent Document 1 discloses a technique for installing an oil supply member for supplying a lubricant to the raceway surface of the guide rail on the end face of the slider. ing.
The oil supply member is in contact with the raceway surface of the guide rail, and when the slider travels, the lubricant of the oil supply member is applied to the raceway surface of the guide rail. Therefore, it is possible to maintain a stable lubricating state over a long period of time. Further, wear of sealing devices such as side seals and under seals that are attached to the slider and are in sliding contact with the outer surface of the guide rail is also suppressed.

  Patent Document 2 discloses a technique in which an oil supply member that supplies a lubricant to rolling elements in a direction change path is installed on an end cap. The oil supply member is installed so as to come into contact with the rolling elements in the direction change path, and when the rolling element moves in the direction change path as the slider travels, the lubricant of the oil supply member is applied to the rolling elements. It has become. Therefore, it is possible to maintain a stable lubricating state over a long period of time.

  Furthermore, Patent Document 3 discloses a technique in which an oil supply member that supplies a lubricant to rolling elements in a return passage is installed in a slider body. The oil supply member is a tubular member made of an oil-containing material such as an oil-containing resin. The oil supply member is installed in the through hole of the slider body, and the hollow interior of the oil supply member serves as a return passage. Then, when the rolling element moves in the return passage as the slider travels, the lubricant of the oil supply member is applied to the rolling element. Therefore, it is possible to maintain a stable lubricating state over a long period of time.

JP-A-9-111551 JP 2007-100951 A1 JP 2001-82469 A

However, since the techniques disclosed in Patent Documents 1 to 3 are configured to supply the lubricant only to one of the rolling elements and the raceway surface, the supply of the lubricant to the lubricated portion of the linear motion guide device is insufficient. For example, in applications that require high durability, there is a risk that damage such as wear may easily occur on the rolling elements or the raceway surface.
Accordingly, 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 in which damage such as wear does not easily occur on the rolling elements and the raceway surface.

  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, a lubricating member having a lubricant and a lubricant of the lubricating member are guided to the guide A first lubricant supply unit that supplies rails and a second lubricant supply unit that supplies the lubricant of the lubricant member to the rolling elements are provided.

In this linear motion guide device, the lubricating member having the lubricant supplied by the first lubricant supply unit and the lubricating member having the lubricant supplied by the second lubricant supply unit are the same lubricating member. There may be.
Alternatively, the first lubricant member having the lubricant supplied by the first lubricant supply unit and the lubricant member provided separately from the first lubricant member and having the lubricant supplied by the second lubricant supply unit And a second lubricating member. In this case, the lubricant included in the first lubricant member and the lubricant included in the second lubricant member may be different types of lubricants.

  According to the present invention, damage such as wear hardly occurs on the rolling elements and the raceway surface.

It is a perspective view which shows the structure of the linear guide apparatus which concerns on 1st embodiment of this invention. It is the front view which looked at the linear motion guide apparatus of FIG. 1 from the longitudinal direction of the guide rail (however, the end cap is omitted and illustrated). It is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus of FIG. 1 with the horizontal surface in alignment with the longitudinal direction of a guide rail. It is a figure which shows the modification of 1st embodiment, and is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus in the horizontal surface along the longitudinal direction of a guide rail. It is a figure which shows another modification of 1st embodiment, and is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus in the horizontal surface along the longitudinal direction of a guide rail. It is a figure which shows the structure of the linear motion guide apparatus which concerns on 2nd embodiment of this invention, and is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus by the horizontal surface along the longitudinal direction of a guide rail. It is a figure which shows the modification of 2nd embodiment, and is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus in the horizontal surface in alignment with the longitudinal direction of a guide rail. It is a figure which shows the structure of the linear motion guide apparatus which concerns on 3rd embodiment of this invention, and is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus in the horizontal surface along the longitudinal direction of a guide rail. It is a figure which shows the modification of 3rd embodiment, and is the principal part expanded sectional view which cut | disconnected the linear motion guide apparatus in the horizontal surface along the longitudinal direction of a guide rail.

  An embodiment of a linear motion guide device according to the present invention will be described in detail with reference to the drawings. 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.

[First embodiment]
A slider 2 having a substantially U-shaped cross section is assembled on a guide rail 1 having a substantially rectangular cross section extending in a straight line so as to be movable in the longitudinal direction of the guide rail 1. On the ridge where the left and right side surfaces 1a and 1a in the width direction of the guide rail 1 intersect with the upper surface 1b, rolling element raceway grooves 10 and 10 each having a substantially circular arc-shaped concave groove extending in the longitudinal direction. (Corresponding to the raceway surface, which is a constituent requirement of the present invention).

  Further, rolling body raceway grooves 10 and 10 each formed of a concave groove having a substantially semicircular cross section extending in the longitudinal direction are formed at substantially the center in the vertical direction of both the left and right side surfaces 1a and 1a in the width direction of the guide rail 1. Then, a part of the cage 4 is accommodated in the groove bottom portion of the rolling element raceway grooves 10 and 10 formed at substantially the center in the vertical direction of the lateral left and right side surfaces 1 a and 1 a of the guide rail 1. A cage groove 10a (wire groove) for guiding the cage 4 during movement is formed along the longitudinal direction across both ends of the slider 2 movement region (for example, between both longitudinal ends of the guide rail 1). The cross-sectional shape of the cage groove 10a is, for example, a substantially rectangular shape.

  The slider 2 includes a plate-like body 7 facing the upper surface 1b of the guide rail 1, and two legs 6 and 6 extending downward from the left and right sides of the body 7 and facing 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. The slider 2 is movably attached to the guide rail 1 such 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). Furthermore, lubricating members 20 and 20 having a lubricant are attached to both ends of the slider 2 (the outer end surfaces in the moving direction of the end caps 2B). The lubricating member 20 will be described in detail later.

  Furthermore, the outer end surfaces of the lubricating members 20 and 20 in the moving direction 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 the opening of the gap between the guide rail 1 and the slider 2 is described above. Side seals 5 and 5 are attached to seal the portion facing the end surface in the moving direction. The lower portion of the slider 2 is on the lower surface side of the slider 2 in the opening of the gap between the guide rail 1 and the slider 2. Under seals 8 and 8 are attached to seal the facing parts. The side seals 5 and 5 and the under seals 8 and 8 prevent foreign matter from entering the gap from the outside and leakage of the lubricant from the gap to the outside.

  Further, the corners of the inner side surfaces of the left and right leg portions 6 and 6 of the slider body 2A and the substantially central portion in the vertical direction are substantially semicircular in cross section facing the rolling element raceway grooves 10, 10, 10, and 10 of the guide rail 1. The rolling element raceway grooves 11, 11, 11, 11 (corresponding to the raceway surface, which is a constituent element of the present invention) are formed. Then, between the rolling element raceway grooves 10, 10, 10, 10 of the guide rail 1 and the rolling element raceway grooves 11, 11, 11, 11 of the slider 2, the rolling passages 13, 13, 13, 13 are respectively formed, and these rolling passages 13, 13, 13, 13 extend in the longitudinal direction.

  A plurality of rolling elements 3 (for example, balls made of steel or ceramic) are loaded in the rolling passages 13 while being held by the cage 4 so as to be able to roll. The slider 2 is guided by the guide rail 1 through the rolling of the moving body 3 and moves in the longitudinal direction. The cage 4 is formed of, for example, a wire, and holds the rolling element 3 in order to prevent the rolling element 3 from falling off the slider 2 before being assembled to the guide rail 1.

  In addition, the kind of rolling element 3 is not limited to a ball | bowl, A roller may be sufficient. Further, the number of rolling element raceway grooves 10 and 11 included in the guide rail 1 and the slider 2 is not limited to two rows on one side, and may be one row on one side or three or more rows, for example. Furthermore, the cross-sectional shape of the rolling element raceway grooves 10 and 11 may be an arc shape formed of a single arc as described above, but is substantially V-shaped (Gothic arc shape groove formed by combining two arcs having different centers of curvature. )

Furthermore, the slider 2 has a 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 with the rolling passages 13, 13, 13, and 13. Return passages 14, 14, 14, and 14 each having a circular straight hole are provided.
On the other hand, the end cap 2B is made of, for example, a molded product of a resin material and has a substantially U-shaped cross section. Further, on both the left and right sides of the back surface of the end cap 2B (the contact surface with the slider main body 2A), direction change paths 15 having a circular cross-section and curved in a semi-doughnut shape are formed in two upper and lower stages. 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 passage 15.

The return passage 14 and the direction change paths 15 and 15 at both ends constitute a rolling member conveyance path 16 that sends the rolling element 3 from the end point of the rolling passage 13 to the starting point (the rolling element conveyance path 16 is connected to the rolling passage 13 and The rolling passage 13 and the rolling element conveyance path 16 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 rolling element 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 rolling element 3 reaches the end point of the rolling passage 13, the rolling body 3 is scooped up from the rolling passage 13 and sent to the direction changing path 15. The rolling element 3 that has entered the direction change path 15 makes a U-turn and is introduced into the return path 14, and reaches the opposite direction change path 15 through the return path 14. Here, the U-turn is made again to return to the starting point of the rolling passage 13, and such circulation in the circulation path is repeated infinitely.

  Here, the lubricating member 20 will be described in detail. Lubricating members 20 and 20 attached to both ends of the slider 2 have a lubricant such as lubricating oil and grease. Examples of the lubricating member 20 include molded bodies formed of oil-containing materials such as oil-containing resins and oil-containing rubbers. Specifically, a molded body obtained by molding a mixture of a lubricant and a resin or rubber, or a resin or rubber molded body impregnated with a lubricant can be used. The type of resin is not particularly limited, and examples thereof include polyurethane, polyethylene, and polypropylene.

Another example of the lubricating member 20 is a porous member made of a porous material impregnated with a lubricant. Examples of the porous body include a porous body made of polyolefin and a fiber entangled body. The type of polyolefin is not particularly limited, and examples thereof include polyethylene and polypropylene. The type of fiber entangled body is not particularly limited, and examples thereof include wool felt, polyester fiber entangled body, polyamide fiber entangled body, acrylic fiber entangled body, and the like.
Although the kind of lubricant which the lubricating member 20 has is not specifically limited, general lubricating oils, such as mineral oil and synthetic oil, and general lubricating grease can be used.

  The lubricating member 20 may be attached to both ends of the slider 2 as it is, or may be housed in a case 30 formed of a material such as resin or metal and attached to both ends of the slider 2. The lubricating member 20 may be a case in which a lubricant is accommodated in a case made of a material such as resin or metal. In the present embodiment, the lubricating member 20 is a molded body formed of an oil-containing material, and is accommodated in the case 30 and attached to both ends of the slider 2.

  The lubricating member 20 has a substantially U-shaped cross-section similar to the end cap 2B, and a first lubricant that supplies the lubricant of the lubricating member 20 to the outer surface of the guide rail 1 is provided on the inner surface thereof. The supply portion 21 is formed so as to protrude inward from the lubricating member 20 over the entire inner surface of the lubricating member 20. The first lubricant supply unit 21 is integrated with the lubricating member 20 and protrudes from the opening formed in the case 30 to the outside of the case 30. Since the protruding tip of the first lubricant supply portion 21 has a shape corresponding to the outer surface shape of the guide rail 1, it is formed on the outer surface (the upper surface 1b and the side surfaces 1a, 1a) including the rolling element raceway grooves 10 of the guide rail 1. In contact.

  When the slider 2 travels, the lubricant of the lubricant member 20 oozes out from the protruding tip of the first lubricant supply part 21 and is supplied to the outer surface (upper surface 1b and side surfaces 1a, 1a) of the guide rail 1 that is in contact. (Coating). The lubricant supplied to the rolling element raceway grooves 10 of the guide rail 1 is used for lubrication between the rolling element 3 and the rolling element raceway grooves 10 and 11, and damage (for example, the rolling element 3 and the rolling element raceway grooves 10 and 11). (Wear) is suppressed.

  Since the first lubricant supply part 21 is in contact with almost the entire surface of the outer surface (the upper surface 1b and the side surfaces 1a and 1a) of the guide rail 1 except for the cage groove 10a, Lubricant is supplied. Therefore, the lubricant supplied to the outer surface of the guide rail 1 other than the rolling element raceway grooves 10 is used for lubrication of the lip portions of the side seal 5 and the under seal 8 and the outer surface of the guide rail 1 in sliding contact with them. The wear of the lip portion of the side seal 5 and the under seal 8 is suppressed. Therefore, the linear motion guide device of this embodiment is excellent in dust resistance. Although the first lubricant supply part 21 may be formed so that the protruding tip of the first lubricant supply part 21 also contacts the inner surface of the cage groove 10a, the shape of the first lubricant supply part 21 is Since it becomes complicated, it is preferable to avoid contact.

  Further, on the surface of the lubricating member 20 facing the end cap 2 </ b> B, a second lubricant supply unit 22 that supplies the lubricant of the lubricating member 20 to the rolling elements 3 in the direction change path 15 is provided from the lubricating member 20. It is formed so as to protrude toward the end cap 2B. The second lubricant supply unit 22 is integrated with the lubricant member 20 and protrudes from the opening formed in the case 30 to the outside of the case 30. Further, the end cap 2B is formed with a hole penetrating the surface facing the lubricating member 20 (the outer end surface in the moving direction) and the inner surface of the direction changing path 15, and the second lubricant supply unit 22 It is arranged in the hole.

  The protruding tip of the second lubricant supply part 22 extends to the opening of the hole on the direction changing path 15 side, and slightly protrudes into the direction changing path 15 from the opening. Since the protruding tip of the second lubricant supply part 22 protruding into the direction change path 15 contacts the rolling element 3 that rolls within the direction change path 15, the lubricant of the lubricating member 20 becomes the second lubricant supply part. It oozes out from the protruding tip of 22 and is supplied (applied) to the rolling element 3 in contact therewith. The lubricant supplied to the rolling element 3 is used for lubrication between the rolling element 3 and the rolling element raceway grooves 10 and 11, and suppresses damage (for example, wear) of the rolling element 3 and the rolling element raceway grooves 10 and 11.

  The protruding tip of the second lubricant supply part 22 protrudes into the direction change path 15, and the amount of protrusion (the length from the opening of the hole on the direction change path 15 side to the protruding tip of the second lubricant supply part 22). Is preferably 0.02 mm to 0.5 mm. If it is less than 0.02 mm, the protruding tip of the second lubricant supply unit 22 becomes difficult to contact the rolling element 3, and if it exceeds 0.5 mm, it may interfere with the rolling element 3 and inhibit rolling. is there.

  As described above, the first lubricant supply unit 21 and the second lubricant supply unit 22 are formed in one lubricant member 20, and the lubricant is transferred from the one lubricant member 20 to both the rolling element 3 and the rolling element raceway groove 10. To be supplied. Therefore, compared to the case where the lubricant is supplied to only one of the rolling element 3 and the rolling element raceway groove 10, the amount of lubricant supplied to the lubricated portion of the linear guide device is sufficient. Even in applications that require durability, the rolling element 3 and the rolling element raceway grooves 10 and 11 are unlikely to be damaged such as wear.

Further, since the lubricant is supplied to the outer surface (the upper surface 1b and the side surfaces 1a and 1a) of the guide rail 1, wear of the lip portions of the side seal 5 and the under seal 8 that are in sliding contact with the outer surface of the guide rail 1 is suppressed.
Further, when the linear motion guide device is used in an environment where the guide rail 1 is in contact with a large amount of foreign matter (for example, coolant, cutting waste, dust), the lubricant on the outer surface of the guide rail 1 may be removed by the foreign matter. Although the function as the lubricant is reduced, in the linear motion guide device of the present embodiment, the lubricant is directly and continuously supplied from the first lubricant supply unit 21 to the outer surface of the guide rail 1, The lubrication state between the lip portions of the side seal 5 and the under seal 8 and the outer surface of the guide rail 1 is always maintained well. Therefore, the lip portions of the side seal 5 and the under seal 8 are not easily worn.

  Further, the linear motion guide device is used in an environment where the guide rail 1 is in contact with a large amount of foreign matter, and the lubricant supplied from the first lubricant supply section 21 to the rolling element raceway groove 10 of the guide rail 1 is removed. Even if the function as a lubricant is reduced, the lubricant is directly and continuously supplied from the second lubricant supply unit 22 to the rolling element 3 in the linear motion guide device of the present embodiment. The rolling element 3, the rolling element raceway grooves 10 and 11, and the lubrication state are always kept good. Therefore, wear of the rolling element 3 and the rolling element raceway grooves 10 and 11 hardly occurs.

  The first embodiment shows an example of the present invention, and the present invention is not limited to the first embodiment. For example, in the first embodiment, the protruding tip of the second lubricant supply part 22 protrudes into the direction change path 15, but as shown in the modification of FIG. 4, the protruding of the second lubricant supply part 22. The tip does not protrude into the direction change path 15 and may be disposed in the direction change path 15 (that is, there is a gap near the opening of the hole on the direction change path 15 side).

  The lubricant that has oozed out from the protruding tip of the second lubricant supply part 22 flows into the direction change path 15 from the gap and is supplied to the rolling elements 3 in the direction change path 15. The lubricant supplied to the rolling element 3 is used for lubrication between the rolling element 3 and the rolling element raceway grooves 10 and 11, and suppresses damage (for example, wear) of the rolling element 3 and the rolling element raceway grooves 10 and 11. Compared with the example of FIG. 3, the protruding tip of the second lubricant supply unit 22 does not come into contact with the rolling element 3, so the protruding tip of the second lubricant supply unit 22 is not worn, and the lubricant is not applied for a long time. Supply can be made.

  The distance from the projecting tip of the second lubricant supply unit 22 to the opening of the hole on the direction changing path 15 side is preferably 0.1 mm or more and 0.5 mm or less. If it is less than 0.1 mm, the second lubricant supply part 22 and the rolling element 3 may come into contact with each other. If it exceeds 0.5 mm, the direction of the hole is changed from the protruding tip of the second lubricant supply part 22. Since the distance to the opening on the side of the path 15 is long, there is a possibility that the lubricant does not reach the direction change path 15 sufficiently.

  In the first embodiment, the first lubricant supply unit 21 and the second lubricant supply unit 22 are integrated with the lubricant member 20, but either one or both of them are separate from the lubricant member 20. It is good also as a member. FIG. 5 shows a modification in which the second lubricant supply unit 22 is a separate member from the lubricant member 20. The lubrication member 20 and the second lubricant supply unit 22 which are separate members are both simple-shaped members and can be assembled to produce a linear motion guide device. Easy.

  Furthermore, if it is the structure of FIG. 5, it is possible to comprise the lubricating member 20 and the 2nd lubricant supply part 22 with a different material. For example, if the lubricating member 20 is made of a material having a high ability to hold a lubricant, and the second lubricant supply unit 22 is made of a material having a high wear resistance but not a high ability to hold a lubricant, a large amount It is possible to supply the lubricant stably over a long period of time while holding the lubricant.

[Second Embodiment]
The linear motion guide device according to the second embodiment of the present invention will be described in detail with reference to FIG. However, since the structure and effect of the linear guide apparatus of 2nd embodiment are substantially the same as 1st embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.
In the first embodiment, a first lubricant supply unit 21 and a second lubricant supply unit 22 are formed in one lubricant member 20, and the lubricant is transferred from one lubricant member 20 to the rolling element 3 and the rolling element track. The lubricant is supplied to both of the grooves 10 (that is, the lubricant having the lubricant supplied by the first lubricant supply unit 21 and the lubricant having the lubricant supplied by the second lubricant supply unit 22). The lubricant member having the lubricant supplied by the first lubricant supply unit 21 and the lubricant member having the lubricant supplied by the second lubricant supply unit 22 are the same lubricant member). Alternatively, a separate member may be used.

  That is, as shown in FIG. 6, a second lubricating member 20B having a lubricant is attached to the outer end surface of the end cap 2B of the slider 2 in the moving direction, and a second lubricating member 20B is attached to the outer end surface of the second lubricating member 20B in the moving direction. A first lubricating member 20A that is separate from the two lubricating members 20B and has a lubricant is attached, and side seals 5 and 5 are attached to the outer end surfaces in the moving direction of the first lubricating member 20A.

  The first lubricant member 20A is formed with a first lubricant supply portion 21 that supplies the lubricant of the first lubricant member 20A to the outer surface (the upper surface 1b and the side surfaces 1a, 1a) including the rolling element raceway grooves 10 of the guide rail 1. (The second lubricant supply part 22 is not formed), and the second lubrication member 20B is supplied with the lubricant of the second lubricant member 20B to the rolling elements 3 in the direction change path 15. An agent supply unit 22 is formed (the first lubricant supply unit 21 is not formed). About the structure of the 1st lubricant supply part 21 and the 2nd lubricant supply part 22, and the supply form of a lubricant, since it is the same as that of 1st embodiment, description is abbreviate | omitted.

  With such a configuration, it is possible to have a larger amount of lubricant compared to the first embodiment including one lubricating member 20, and therefore it is possible to supply the lubricant stably over a long period of time. In addition, since the lubricant included in the first lubricant member 20A and the lubricant included in the second lubricant member 20B can be different types of lubricants, different types of lubricants can be used depending on the differences in the parts to be lubricated. Therefore, the life of the linear motion guide device can be further extended.

For example, the lubricant included in the first lubricant member 20A can be a lubricant having a high rust prevention effect. If it does so, even if the foreign material containing water | moisture contents, such as a coolant, contacts the guide rail 1, the guide rail 1 can be made hard to rust and a linear motion guide apparatus can be extended in life.
The lubricant included in the second lubricating member 20B can be a high-viscosity lubricating oil (for example, a lubricating oil having a kinematic viscosity grade of about ISO VG 100 to 1000) or grease. If it does so, since the adhesiveness to the rolling element 3 of a lubricant increases, the rolling element 3 can fully be lubricated over a longer period of time.

  The second embodiment shows an example of the present invention, and the present invention is not limited to the second embodiment. For example, in the second embodiment, the number of the first lubricating member 20A and the second lubricating member 20B attached to one end of the slider 2 is one, but the first lubricating member 20A and the second lubricating member 20B are the same. One or both of the lubricating members 20B may be plural. FIG. 7 shows a modification in which two first lubricating members 20A and one second lubricating member 20B are arranged. With such a configuration, since a large amount of lubricant can be supplied to the outer surface of the guide rail 1, damage to the rolling element 3 and the rolling element raceway grooves 10, 11 can be further suppressed, Wear of the lip portions of the side seal 5 and the under seal 8 can be further suppressed.

[Third embodiment]
The linear guide apparatus according to the third embodiment of the present invention will be described in detail with reference to FIG. However, since the structure and effect of the linear guide apparatus of 3rd embodiment are substantially the same as 2nd embodiment, only a different part is demonstrated and description of the same part is abbreviate | omitted.
In the second embodiment, the second lubricating member 20 </ b> B is mounted on the outer end surface in the moving direction of the end cap 2 </ b> B of the slider 2, but may be disposed in the return passage 14. That is, as shown in FIG. 8, a first lubricating member 20A is attached to the outer end surface of the end cap 2B of the slider 2 in the moving direction, and a side seal is further attached to the outer end surface of the first lubricating member 20A in the moving direction. 5 and 5 are installed.

  A through-hole through which the second lubricating member 20B formed in a tubular shape penetrates the upper and lower thick portions of the left and right leg portions 6 and 6 of the slider body 2A in the longitudinal direction in parallel with the rolling passage 13 It is inserted in. The hollow interior of the tubular second lubrication member 20B constitutes the return passage 14, and the inner surface of the tubular second lubrication member 20B constitutes the second lubricant supply part 22 for supplying the rolling element 3 with a lubricant. .

With such a configuration, compared to the linear motion guide device of the second embodiment, since there are fewer parts to be attached to both ends of the slider 2 (both ends in the movement direction), the overall length of the slider 2 can be shortened. it can.
The third embodiment shows an example of the present invention, and the present invention is not limited to the third embodiment. For example, in the third embodiment, the first lubricating member 20 </ b> A attached to the outer end surface in the moving direction of the end cap 2 </ b> B of the slider 2 includes only the first lubricant supply part 21 and is only on the outer surface of the guide rail 1. Although a lubricant is supplied, the first lubricant supply unit 21 and the second lubricant supply unit 22 may be provided to supply the lubricant to the outer surface of the guide rail 1 and the rolling elements 3 in the direction change path 15. Good (see FIG. 9).

  That is, even if a lubricating member having the same configuration as the lubricating member 20 (see FIGS. 3 to 5) included in the linear motion table device of the first embodiment is mounted on the outer end surface in the moving direction of the end cap 2 </ b> B of the slider 2. Good. With such a configuration, the amount of lubricant supplied to the rolling element 3 can be increased as compared with the configuration of FIG. 8, and the rolling element 3 can be more sufficiently lubricated.

1 Guide rail 2 Slider 2A Slider body 2B End cap
3 Rolling element 5 Side seal 10 Rolling element raceway groove (Raceway surface)
11 Rolling element raceway (Raceway surface)
DESCRIPTION OF SYMBOLS 13 Rolling path 14 Return path 20 Lubrication member 20A 1st lubrication member 20B 2nd lubrication member 21 1st lubricant supply part 22 2nd lubricant supply part

Claims (4)

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,
A lubricating member having a lubricant, a first lubricant supplying unit that supplies the lubricant of the lubricating member to the guide rail, a second lubricant supplying unit that supplies the lubricant of the lubricating member to the rolling elements, A linear motion guide device comprising:   2. The direct lubrication member according to claim 1, wherein the lubricating member having the lubricant supplied by the first lubricant supply unit and the lubricating member having the lubricant supplied by the second lubricant supply unit are the same lubricating member. Motion guide device.   A first lubricating member having a lubricant supplied by the first lubricant supply unit; and a second lubricating member separately from the first lubricating member and having a lubricant supplied by the second lubricant supplying unit. The linear motion guide device according to claim 1, further comprising a lubricating member.   The linear motion guide device according to claim 3, wherein the lubricant included in the first lubricant member and the lubricant included in the second lubricant member are different types of lubricants.

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