JPH1182505A - Direct acting guide bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a direct acting guide bearing device which sticks to rolling grooves for a rolling body of a guide rail and is capable of supplying lubricant enough to maintain the rolling motion of the rolling body. SOLUTION: This direct acting guide bearing device is provided with rolling grooves 13a and 13b for a rolling body and a slider 12 which is equipped with a rolling body circuit including a rolling body return passage and is fitted in a guide rail 11 extending in the axial direction. Multiple rolling bodies are loaded on the rolling body circuit to move the slider 12 relatively along the guide rail 11, and a lubricant including member 21 consisting of rubber or synthetic resin including lubricant is placed between the edge of the slider 12 and a plate member at the end of the slider 12 and a part of the lubricant including member 21 is attached keeping in contact with the guide rail 11. In this case, slits 28a and 28c are made at least in either of a region facing to a surface with rolling grooves 13a and 13b for the rolling body on the guide rail of the lubricant including member 21 or a region facing to an upper surface on the guide rail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear guide bearing device used as a linear guide in machine tools, industrial machines and the like.

[0002]

2. Description of the Related Art A linear guide used in a machine tool, an industrial machine, or the like is composed of a guide rail extending in the axial direction and a slider movably fitted to the guide rail. A rolling element rolling groove is provided on the outer surface of the guide rail, and a load rolling element rolling groove facing the rolling element rolling groove of the guide rail is provided on the slider. Further, at both ends of the load rolling element rolling groove, rolling element circulation paths including rolling element return paths connected through curved paths are provided. A large number of rolling elements for relatively moving the slider along the guide rails are loaded in the rolling element circulation path.

A linear guide bearing device as a linear guide of this kind is disclosed in Japanese Patent Application Laid-Open No. 9-5363 filed by the present applicant.
No. 7 (hereinafter referred to as a conventional example).
This conventional example is such that in a linear motion guide bearing device, a lubricant can be stably supplied to a rolling element for a long period of time, and the rolling element maintains a smooth rolling motion. Are configured as shown in FIG. 12 and FIG.

[0004] In FIG. 12, rolling element rolling grooves 2 a and 2 b are provided on the outer surface of the guide rail 1, and a load rolling element rolling element opposed to the rolling element rolling grooves 2 a and 2 b of the guide rail 1 is provided on the slider 3. A groove (not shown) is provided. End caps 4 are provided at both ends of the slider 3, and a reinforcing plate 5, a lubricant-containing member 6
Further, the side seal 7 as a plate-like member is fixed in an overlapping state.

[0005] The lubricant-containing member 6 sandwiched between the side seal 7 and the reinforcing plate 5 is formed in a substantially U-shape corresponding to the outer shape of the end cap 4, and the inner surface of the U-shape is formed. The guide rail 1 has a flat shape, not a tapered shape, and has a shape capable of slidingly contacting the upper surface 1a of the guide rail 1 and the outer surface 1b including the rolling element rolling grooves 2a and 2b according to the cross-sectional shape of the guide rail 1. I have.

Accordingly, when the lubricant containing member 6 moves along the guide rail 1 integrally with the slider 3, the lubricant gradually seeping out from the lubricant containing member 6 with time is surely supplied to the guide rail 1, The lubricant supplied to the guide rail 1 is applied to the surface of the guide rail 1 and the rolling element rolling grooves 2a,
It is supplied to rolling elements via 2b.

Further, as shown in FIG. 13, through holes 8a, 8b formed in both sleeves 6a, 6b of the lubricant containing member 6.
Ring-shaped members 9a and 9b are fitted into each of b. Also, a ring-shaped member 9c is fitted into a through hole 8c formed in the connecting portion 6c of the lubricant containing member 6.

[0008]

However, the linear motion guide bearing device disclosed in Japanese Patent Application Laid-Open No. 9-53637 is disclosed in FIG.
As shown in FIG. 3, the width of the U-shaped concave portion of the lubricant-containing member 6 is reduced by the ring-shaped member 9c fitted into the through-hole 8c formed in the connecting portion 6c of the lubricant-containing member 6, and pressed against the guide rail 1. However, if the shape accuracy of the lubricant containing member 6 is poor, there is a problem that the lubricant containing member 6 does not come into contact with the rolling portion of the rolling element, so that sufficient lubrication cannot be performed.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to closely contact a rolling element rolling groove of a guide rail even if there is some error in the shape accuracy of a lubricant-containing member. Another object of the present invention is to provide a linear motion guide bearing device capable of supplying a lubricant sufficient for the rolling element to maintain rolling motion.

[0010]

In order to achieve the above object, according to the present invention, a slider is loosely fitted to an axially extending guide rail having a rolling element rolling groove on an outer surface thereof.
The slider includes a load rolling element rolling groove opposed to the rolling element rolling groove of the guide rail, and a rolling element return path connected to both ends of the load rolling element rolling groove via curved paths. A plurality of rolling elements for relatively moving the slider along the guide rails are mounted on the rolling element circulation path, and a lubricant is provided between the end face of the slider and the plate member at the end of the slider. In a linear motion guide bearing device in which a lubricant-containing member made of rubber or synthetic resin is sandwiched, and at least a part of the lubricant-containing member is mounted in contact with the guide rail, A slit is provided in at least one of a portion of the guide rail facing the surface having the rolling element rolling groove and a portion facing the upper surface of the guide rail.

According to the above configuration, the slit facilitates the elastic deformation of the lubricant-containing member. When the lubricant-containing member is mounted on the end of the slider, the lubricant-containing member deforms according to the shape of the guide rail. And adhere.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment, FIG. 1 is an exploded perspective view of a linear motion guide bearing device, and FIG. 2 is a front view of a lubricant containing member straddling a guide rail. As shown in FIG. 1, the rolling element rolling grooves 13a, 1
A guide rail 11 having an extension 3b and extending in the axial direction is provided, and a slider 12 that is assembled across the guide rail 11 is provided.

More specifically, both side surfaces 11 of the guide rail 11
b, two rolling element rolling grooves 13 having a substantially semicircular cross section
a, 13b are formed. Rolling element rolling groove 13a, 1
In the groove bottom of 3b, an escape groove 1 of a cage for preventing the rolling element from falling off when the slider 12 is not assembled to the guide rail 11 is provided.
3c is formed.

On the other hand, the slider 12 is
a and end caps 12b attached to both ends thereof
The slider body 12a has load rolling element rolling grooves (not shown) facing the rolling element rolling grooves 13a and 13b of the guide rail 11 on the inner side surfaces of both sleeves 14,
It has a rolling element return path that penetrates the thick portion of the sleeve in the axial direction. On the other hand, the end cap 12b has a curved path (not shown) that connects the rolling element rolling groove of the slider body 12a and a rolling element return path parallel to the rolling element rolling groove. The rolling element circulation circuit is formed by the path and the curved paths at both ends. A number of rolling elements made of, for example, steel balls are loaded in the rolling element circulation circuit. In the drawing, reference numeral 17 denotes a mounting hole for a grease nipple.

The end cap 12b is an injection-molded product made of a synthetic resin material and has a substantially U-shaped cross section. And
On each outer surface side of the end cap 12b, a reinforcing plate 20, a lubricant containing member 21, and a side seal 22 as a plate member are fixed in a superposed state from a side near the end cap 12b. Have been.

Of these, the reinforcing plate 20 is a substantially U-shaped steel plate adapted to the outer shape of the end cap 12b.
The two sleeves 20a and 20b are formed with through holes 18a and 18b for penetrating mounting screws, and the connecting part 20c connecting the two sleeves 20a and 20b is provided with a through hole 18c for grease nipple. Is formed. The reinforcing plate 20 is not in contact with the guide rail 11.

The side seal 22 is made of a substantially U-shaped steel plate conforming to the outer shape of the end cap 12b, and nitrile rubber or grease having a shape similar to the steel plate and integrally formed on the outer surface thereof. And polyurethane rubber contained. The lip portion 23 of the side seal 22 that comes into contact with the guide rail 11 has an inner surface that matches the cross-sectional shape of the guide rail 11 so that the gap between the slider 12 and the guide rail 11 can be sealed. 11 can be slid on the upper surface 11a and the outer surface 11b, more specifically, the rolling element rolling grooves 13a, 13
It is formed in a shape that can be slidably contacted also with b and the escape groove 13c. In addition, both sleeve portions 22a, 22 of this side seal 22
b, through holes 19a and 19b for penetrating the mounting screw are formed, and a connecting portion 22c for connecting the two sleeve portions 22a and 22b is formed with a through hole 19 for the grease nipple.
c is formed.

The lubricant-containing member 21 sandwiched between the side seal 22 and the reinforcing plate 20 is made of a lubricant-containing rubber or a synthetic resin, and is made of a rubber-containing lubricant. In the case of 21, for example,
Polyurethane rubber cured in a state containing grease can be used. Polyurethane rubber is a compound formed by a reaction between polyisocyanate and an active hydrogen compound. As polyisocyanate, tolylene diisocyanate, hexamethylene diisocyanate and the like can be used.

Examples of the active hydrogen compound include hydrocarbons such as polybutadiene, polyethers such as polyoxypropylene, long-chain active hydrogen compounds such as castor oil, polyester, and polycarbonate; water, polyhydroxy compounds such as ethylene glycol; amino alcohols; Short chain active hydrogen compounds such as compounds can be used. As grease, ordinary grease such as mineral oil lithium soap grease can be used.

Next, when the lubricant is contained in the synthetic resin to produce the lubricant containing member 21, the lubricant containing member 2
1 is polyethylene, polypropylene, polybutylene,
Synthetic resins selected from the group of polyolefin-based resins having basically the same chemical structure such as polymethylpentene, paraffin-based hydrocarbon oils such as poly-α-olefin oil, naphthenic hydrocarbon oils, mineral oils as lubricants, A material prepared by injection molding a raw material prepared by mixing any one of ether oils such as dialkyldiphenyl ether oil and ester oils such as phthalic acid ester alone or in the form of a mixed oil can be used. May be added with various additives such as an antioxidant, a rust inhibitor, an antiwear agent, a defoaming agent, and an extreme pressure agent in advance.

The composition ratio of the lubricant-containing member 21 is 20 to 80% by weight of the polyolefin resin and 80 to 20% by weight of the lubricant based on the total weight. When the content of the polyolefin resin is less than 20% by weight, a certain level of hardness and strength cannot be obtained. When the polyolefin resin exceeds 80% by weight (that is, when the amount of the lubricant is less than 20% by weight), the supply of the lubricant decreases, and the effect of reducing the wear of the lip portion of the sealing device decreases.

The groups of the synthetic resins have the same basic structure but different average molecular weights, and are 1 × 10 ^{3 to} 5 × 10 ^6.
Range. Among them, average molecular weight 1 × 10
One having a relatively low molecular weight of ³ to 1 × 10 ⁶ and 1 × 1
0 ⁶ a to 5 × 10 ⁶ as those of ultra-high molecular weight, using a mixture according to either alone or in need. In order to improve the mechanical strength of the lubricant-containing member 21 of the present invention, the following thermoplastic resin and thermosetting resin may be added to the above-mentioned polyolefin-based resin.

As the thermoplastic resin, various resins such as polyamide, polycarbonate, polybutylene terephthalate, polyphenylene sulfide, polyether sulfone, polyether ether ketone, polyamide imide, polystyrene and ABS resin can be used. Thermosetting resins include unsaturated polyester resins, urea resins, melamine resins, phenolic resins, polyimide resins,
Each resin such as an epoxy resin can be used.

These resins may be used alone or as a mixture. Further, in order to disperse the polyolefin resin and the other resin in a more uniform state, a suitable compatibilizer may be added as necessary. Further, a filler may be added to improve the mechanical strength.
For example, calcium carbonate, magnesium carbonate, inorganic whiskers such as potassium titanate whiskers and aluminum borate whiskers, or glass fiber or asbestos,
Inorganic fibers such as metal fibers and those obtained by braiding them into a cloth shape, and in the case of organic compounds, carbon black, graphite powder, carbon fibers, aramid fibers, polyester fibers, and the like may be added.

Further, in order to prevent deterioration of the polyolefin resin due to heat, N, N'-diphenyl-P-phenylenediamine, 2,2'-methylenebis (4-ethyl-6-t-butylphenol) and the like are used. Antioxidants, and for the purpose of preventing deterioration by light, 2-hydroxy-4-
n-octoxybenzophenone, 2- (2'-hydroxy-3'-tert-butyl-5'-methyl-phenyl)-
An ultraviolet absorber such as 5-chlorobenzotriazole may be added.

The addition amount of all of the above additives (other than polyrefine + oil) is preferably 20% by weight or less of the total amount of the forming raw material in order to maintain the lubricant supply capacity. .

The lubricant-containing member 21 is formed in a substantially U-shape corresponding to the outer shape of the end cap 12b, and the inner surface of the U-shape is not tapered but flat. Similarly to the inner surface of the lip portion 23 of the side seal 22, the upper surface 11a of the guide rail 11 and the rolling element rolling grooves 13a,
The outer surface 11b including the outer surface 3b is slidable.

The two sleeves 21 of the lubricant containing member 21
a, 21b also have through holes 24a, 24 for mounting screw penetration.
b are formed, and both sleeve portions 21a, 21b
Is formed in the connecting portion 21c for connecting the grease nipple, and the through hole 24c is open to the upper surface side of the connecting portion 21c.

As shown in FIG. 2, the lubricant-containing member 2
The first recess is formed to have such a size that its inner surface is in sliding contact with the upper surface 11a of the guide rail 11 and the outer surface 11b including the rolling element rolling grooves 13a and 13b, and the rolling element of the guide rail 11 on the inner surface of the recess is provided. Protrusions 21f, 21g, 21d, and 21e are formed in portions facing the rolling grooves 13a, 13b so as to slide on the inner surfaces of the grooves 13a, 13b.

The two sleeves 21 of the lubricant containing member 21
The ring-shaped members 25a, 25b are fitted into the through holes 24a, 24b formed in the a, 21b, respectively. These ring-shaped members 25a, 25b
It is a short cylindrical member whose outer diameter is
The dimensions are such that they can be easily fitted into the a and 24b. The ring-shaped member 26 is also fitted into a through hole 24c formed in the connecting portion 21c of the lubricant containing member 21. The ring-shaped member 26 is also a short cylindrical member. However, the outer diameter of the ring-shaped member 26 is larger than the inner diameter of the through hole 24c. In other words, by fitting the ring-shaped member 26 into the through hole 24c, the through hole 24c can be expanded.

Further, the lengths of the ring members 25a, 25b and 26 are slightly (for example, about 0.2 mm) longer than the thickness of the lubricant containing member 21. That is,
The ring-shaped members 25a, 25b and 26 are inserted through the through holes 24a to
24c, the ring-shaped members 25a, 25b
, 26 project from the front surface or the back surface of the lubricant containing member 21.

The reinforcing plate 20, the lubricant containing member 21 and the side seal 22 are connected to the end cap 12b.
Screw 2 that passes through the through hole and is screwed to the main body 12a
7a, 27b are through holes 19a, 1
9b, through the ring-shaped members 25a, 25b inside the through-holes 24a, 24b of the lubricant-containing member 21 and the through-holes 18a, 18b of the reinforcing plate 20, are fixed to the main body 12a integrally with the end cap 12b. It has become.

Further, the concave portions of the lubricant containing member 21 are opposed to the rolling element rolling grooves 13a, 13b of the guide rail 11, and are formed with convex portions 21f, 21d so as to be in sliding contact with the inner surfaces of these grooves 13a, 13b. And between the convex portions 21g and 21e, slits 28a and 28b are provided extending from the inner surface of the concave portion to the vicinity of the through holes 24a and 24b, and these slits 28a and 28b are formed in the thickness direction of the lubricant containing member 21. Penetrates.

Further, slits 28c and 28d having substantially the same length as the slits 28a and 28b are provided at portions facing both side edges of the upper surface 11a of the guide rail 11, and these slits 28c and 28d Through in the thickness direction.

Therefore, the lubricant containing member 21 is easily elastically deformed in the direction of arrow A in FIG. 2 by the slits 28a to 28d, and the rolling element rolling grooves 13a, 13
b of the lubricant-containing member 21 corresponding to b.
And the protrusions 21d to 21g of the lubricant-containing member 21 can be brought into close contact with the rolling element rolling grooves 13a and 13b.

That is, when the lubricant-containing member 21 is formed,
Even if there is some error in the shape accuracy, the rolling element is formed in a structure capable of supplying a lubricant sufficient to keep the rolling motion in close contact with the rolling element rolling grooves 13a and 13b of the guide rail 11.

The lubricant-containing member 21 is connected to the reinforcing plate 20.
In addition, since it is a member interposed between the side seals 22, it is easy to have a size that can contain a sufficient amount of lubricant to maintain the rolling of the rolling element for a long period of time. In addition, since the lubricant-containing member 21 is not fixed to another member such as a steel plate, the cost of parts of the lubricant-containing member 21 which is a consumable product can be reduced, and the labor for disposing the lubricant-containing member 21 is also simple. There is an advantage that is.

Then, the lubricant-containing member 21 is connected to the reinforcing plate 2.
0 and the side seal 22, the portion of the side seal 22 that comes into contact with the guide rail 11, that is, the lip portion 23, does not easily roll up even when the slider 12 reciprocates. Leakage of the grease inside the outside is also reduced. Further, the lubricant that has oozed out of the lubricant containing member 21 is applied to the side seal 2.
2 is also supplied to the lip portion 23 which comes into contact with the guide rail 11 of the second, so that it also helps to reduce the abrasion of the lip portion 23. In particular, the lip portion 23 is made of polyurethane rubber which is cured in a state containing grease. In the case of molding, the lubricant is supplied from itself, and the wear of the lip portion 23 can be further reduced. Then, since the wear of the lip portion 23 is minimized, the sealing performance of the lip portion 23 is maintained for a long time, foreign matter is prevented from entering the main body 12a side, and the life of the linear motion guide bearing device itself is prolonged. There is an advantage that it can be achieved.

In the structure of this embodiment, since the lubricant for the rolling elements is constantly supplied from the lubricant-containing member 21, the grease nipple mounting hole may be closed with a blind plug. If necessary, the opening may be opened at an appropriate time to supply lubricant such as grease into the slider.

Next, the operation of the present embodiment will be described. When the slider 12 moves on the guide rail 11 fixed to the machine base, the rolling elements in the slider 12 become rolling element rolling paths 13a,
13b, the roller 12 moves at a lower speed than the slider 12 in the moving direction of the slider 12 while moving in the direction of movement of the slider 12, makes a U-turn on the curved path on one end side, and moves while rolling in the reverse direction on the rolling element return path, and the other end side. Circulates back to the rolling element rolling path by making a reverse U-turn on the curved path.

When the linear motion guide bearing device is driven in this manner, the lubricant-containing member 21 also moves while being in contact with the guide rail 11, and the influence of frictional heat during the movement is added. The agent gradually exudes over time,
The exuded lubricant flows through the rolling element rolling grooves 13a, especially through the rolling element rolling grooves 13a, 13b of the guide rail 11.
a and 13b are automatically supplied to the rolling elements rolling inside.
Due to this self-lubricating property, stable and smooth operation is performed for a long time. Therefore, good operation can be continued for a long time at a low torque without supplying lubricant to the slider 12 from the outside.

The shape of the inner surface of the concave portion of the lubricant containing member 21 is matched with the cross sectional shape of the guide rail 11 as described above.
And the lubricant-containing member 21 itself self-shrinks as the lubricant seeps out of the lubricant-containing member 21, so that the lubricant-containing member 21 By guide rail 1
Also, an effect of always being in close contact with the surface to be sealed and performing a sealing function and a lubricating function can be obtained.

In the case of this embodiment, the lubricant containing member 21
Since the side seal 22 is used as the plate-shaped member on the outer side of the above, the sealing performance is further improved. In particular, in the present embodiment, since the upper surface side of the through hole 24c formed in the connecting portion 21c of the lubricant containing member 21 is notched and opened,
Since the sleeve portions 21a and 21b can be easily spread right and left, the lubricant-containing member 21 is moved to the guide rail 11
It can also be easily mounted on a bridge.

Since the ring-shaped member 26 having an outer diameter larger than the inner diameter is fitted into the through hole 24c as an urging means, the lubricant-containing member 21 is moved to the guide rail 1
1, the ring-shaped member 26 is
c is spread left and right, so that the sleeves 21a and 21
An urging force is generated that presses b against the guide rail 11. For this reason, even if there is a slight manufacturing error in the dimensions of the lubricant-containing member 21, or even if the lubricant-containing member 21 is slightly worn,
The lubricant-containing member 21 can be more reliably always brought into close contact with the surface to be sealed of the guide rail 11. In this case, in the structure in which the upper surface side of the through-hole 24c is cut open, the force of the ring-shaped member 26 to expand is converted into an urging force for pressing the sleeves 21a and 21b against the guide rail 11. It is very advantageous for the operation.

Further, the length of the ring-shaped members 25a, 25b and 26 is made larger than the thickness of the lubricant-containing member 21, and the ends of the ring-shaped members 25a, 25b and 26 are formed on the surface of the lubricant-containing member 21 or Since the mounting means of the lubricant-containing member 21 is configured to protrude from the back surface, the lubricant-containing member 21 is sandwiched between the reinforcing plate 20 and the side seal 22, but is located between them. Friction is small. For this reason, since the deformation of the lubricant containing member 21 in the direction perpendicular to the axial direction of the guide rail 11 due to the self-shrinkage or the urging force described above is performed smoothly, the lubricant containing member 21 is always surely attached to the guide rail 11. Can be in close contact.

Further, the lubricant-containing member 21 is opposed to the rolling element rolling grooves 13a, 13b.
b between the projections 21g and 21e that are in sliding contact with the inner surface of b.
Since the slits 28b and 28a are provided between the guide rails 11 and 21d, and the slits 28c and 28d are provided at portions opposing both side edges of the upper surface 11a of the guide rail 11, the guide rail 11 is easily elastically deformed. Of the lubricant containing member 21 corresponding to the rolling element rolling grooves 13a and 13b
1d to 21g of position shift is absorbed, and the rolling element rolling groove 13
The protrusions 21d to 21g of the lubricant-containing member 21 are provided on a and 13b.
Can be brought into close contact with each other.

That is, as shown in FIG. 3, when the width in the left-right direction of the protrusions 21d to 21g of the lubricant-containing member 21 opposed thereto is smaller than the width in the left-right direction of the rolling element rolling grooves 13a, 13b. The slits 28c and 28d on the upper portion of the lubricant containing member 21 are elastically deformed in the direction of spreading in the direction of arrow B and coincide with the width of the rolling element rolling grooves 13a and 13b of the guide rail 11.

Further, as shown in FIG.
When the vertical pitch of the protrusions 21d to 21g of the lubricant-containing member 21 opposed thereto is smaller than the vertical pitch of 3a, 13b, the lower slits 28a, 28b of the lubricant-containing member 21 move in the direction of arrow C. And the pitch of the rolling element rolling grooves 13a and 13b of the guide rail 11 coincides with the pitch.

Further, as shown in FIG.
When the vertical pitch of the convex portions 21d to 21g of the lubricant-containing member 21 opposed thereto is larger than the vertical pitch of 3a, 13b, the lower slits 28a, 28b of the lubricant-containing member 21 are in the direction of arrow D. And the pitch of the rolling element rolling grooves 13a and 13b of the guide rail 11 coincides with the pitch.

In the first embodiment, the rolling element rolling grooves 13a and 13b are opposed to each other.
The slits 28b and 28a are provided between the projections 21g and 21e and the projections 21f and 21d which are in sliding contact with the inner surfaces of the guide rails 11a and 13b. Was established,
The present invention is not limited to the above-described embodiment, and the same operation and effect can be obtained even if the configuration is as shown in FIGS.

FIG. 6 shows a second embodiment.
The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Rolling member rolling groove 13 of lubricant containing member 21
slits 28b, 28 between the projections 21g and 21e and the projections 21f and 21d that are in sliding contact with the inner surfaces of the projections 21a and 13b.
a, and slits 28e and 28f are provided in parallel with the slits 28a and 28b above the protrusions 21f and 21g, and the slits 28c and 28d are eliminated.

FIG. 7 shows a third embodiment, in which the same components as those in the first embodiment are assigned the same reference numerals and explanations thereof are omitted. Rolling member rolling grooves 13a, 13b of lubricant containing member 21
Between the projections 21g and 21e slidingly contacting the inner surface of the projection and the projection 2
Slits 28b and 28a are provided between 1f and 21d, and the slits 28b are formed above the projections 21f and 21g.
The slits 28e and 28f are provided in parallel with the holes a and 28b, and the slits 28c and 28d are further provided.

FIG. 8 shows a fourth embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. Rolling member rolling grooves 13a, 13b of lubricant containing member 21
Between the projections 21g and 21e slidingly contacting the inner surface of the projection and the projection 2
Slits 28b and 28a are provided between 1f and 21d, and slits 28c and 28d are
1 is provided obliquely toward the upper corner portion.

FIG. 9 shows a fifth embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The rolling element rolling groove 13a of the guide rail 11 is approximately 1 /
It is formed into a four-arc shape, and slits 28a, 28c and 28b, 28d are provided with the approximately quarter-arc convex portions 21f, 21g slidingly in contact with the inner surface of the rolling element rolling groove 13a, and the slits 28c, 28d are made of lubricant. It is provided obliquely toward the upper corner portion of the containing member 21. Further, the through holes 24a and 24b of the lubricant containing member 21 are formed by cutouts that open sideways.

FIG. 10 shows a sixth embodiment, in which the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. One rolling element rolling groove 13 is provided on both sides of the guide rail 11.
a and the connecting portion 21 of the lubricant containing member 21
c, two slits 28a and 28b are provided above the protrusions 21f and 21g of the lubricant-containing member 21 which is in sliding contact with the rolling element rolling groove 13a. Is provided with one slit 28c.

FIG. 11 shows a seventh embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. One rolling element rolling groove 13 is provided on both sides of the guide rail 11.
a and the connecting portion 21 of the lubricant containing member 21
c, two slits 28a and 28b are provided obliquely above the protrusions 21f and 21g of the lubricant-containing member 21 which is in sliding contact with the rolling element rolling groove 13a. The slit 28c of 21c is eliminated. The position, direction and number of the slits provided in the lubricant-containing member of the present invention are not limited to the above embodiments, and the design can be changed as appropriate.

[0057]

As described above, according to the present invention, at least one of the portion of the guide rail of the lubricant-containing member facing the surface having the rolling element rolling groove and the portion facing the upper surface of the guide rail is provided. The provision of the slit facilitates the elastic deformation of the lubricant-containing member, and makes close contact with the rolling element rolling groove of the guide rail even if there is some error in the shape accuracy of the lubricant-containing member. Therefore, there is an effect that a sufficient amount of lubricant can be supplied to the rolling element to maintain the rolling motion, and a range in which a shape accuracy error during molding of the lubricant-containing member can be tolerated is increased.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a linear motion guide bearing device according to a first embodiment of the present invention.

FIG. 2 shows the same embodiment, and is a front view of a lubricant containing member straddling a guide rail.

FIG. 3 is an operation explanatory view of the embodiment.

FIG. 4 is an operation explanatory view of the embodiment.

FIG. 5 is an operation explanatory view of the embodiment.

FIG. 6 shows the second embodiment of the present invention and is a front view of a lubricant containing member straddling a guide rail.

FIG. 7 shows a third embodiment of the present invention, and is a front view of a lubricant containing member straddling a guide rail.

FIG. 8 shows the fourth embodiment of the present invention, and is a front view of a lubricant-containing member in a state of straddling a guide rail.

FIG. 9 shows a fifth embodiment of the present invention, and is a front view of a lubricant containing member straddling a guide rail.

FIG. 10 shows a sixth embodiment of the present invention, and is a front view of a lubricant-containing member straddling a guide rail.

FIG. 11 shows the seventh embodiment of the present invention, and is a front view of a lubricant containing member straddling a guide rail.

FIG. 12 is a perspective view of a conventional linear guide bearing device.

FIG. 13 is a front view of the lubricant-containing member in a state of straddling the conventional guide rail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Guide rail 12 ... Slider 13a, 13b ... Rolling element rolling groove 20 ... Reinforcement plate 21 ... Lubricant containing member 22 ... Side seal 28a-28f ... Slit

Claims (1)

[Claims] A slider is loosely fitted on an axially extending guide rail having a rolling element rolling groove on an outer surface, wherein the slider is opposed to a rolling element rolling groove of the guide rail. A rolling element circulating path comprising a rolling element return path connected to both ends of the load rolling element rolling groove via a curved path, and moving the slider relatively along the guide rail in the rolling element circulating path. A plurality of rolling elements to be loaded, a lubricant-containing member made of rubber or synthetic resin containing a lubricant is sandwiched between an end surface of the slider and a plate-shaped member at an end of the slider, and the lubricant-containing member A linear guide bearing device mounted with at least a portion thereof in contact with the guide rail, wherein a portion of the lubricant-containing member opposing a surface of the guide rail having a rolling element rolling groove and an upper surface of the guide rail To Linear guide bearing apparatus characterized in that a slit on at least one of sites.