JPH0953637A - Direct acting guide bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply lubricant to a rotor for a long time. SOLUTION: A reinforcing plate 10, member 11 containing lubricant and side seal 12 are laid one on top of another from the side near the end cap 2B and fixed to the outer side of an end cap 2B. The reinforcing plate 10 is made of a steel plate and has a U-like shape nearly same as the shape of the end cap 2B and has a non-contact relation with a guide rail. The side seal 12 comprises a steel plate of a U-like shape nearly the same as the shape of the end cap 2B and a polyurethane rubber containing grease, which has a shape similar to this steel plate and integrally formed on the outer face of the steel plate, and has a lip section 13 on the internal periphery. The member 11 containing lubricant is formed into a U-like shape nearly the same as the shape of the end cap 2B, and the inner face of the U-like shaped one can be slide on the upper face and outer face of the guide rail to the shape of the cross section of the guide rail in the same as the lip section 13.

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, and more particularly to a linear guide bearing device capable of stably supplying a lubricant to rolling elements over a long period of time.

[0002]

2. Description of the Related Art As conventional techniques of this kind, the one disclosed in Japanese Patent Laid-Open No. 6-346919 (first conventional example) previously proposed by the present applicant, and also previously proposed by the present applicant. There is one disclosed in Japanese Patent Application Laid-Open No. 7-35146 (second conventional example) and the like. That is, in the first conventional example, a seal device having a seal lip portion formed of rubber containing lubricant or synthetic resin between the outer surface of the guide rail and the inner surface of the slider that moves along the guide rail. The seal lip portion comes into contact with the outer surface of the guide rail to seal the opening in the gap between the inner surface of the slider and the outer surface of the guide rail. Since the seal lip of the seal device is made of a lubricant-containing rubber or synthetic resin and the seal lip has self-lubricating property, the lubricant contained in the seal itself gradually stains. It is possible to obtain an effect that the seal lip portion is automatically supplied to the seal friction surface to suppress wear of the seal lip portion.

Further, in the second conventional example, a rubber or synthetic resin layer and a lubricant-containing rubber or synthetic resin layer are at least partially overlapped and integrally joined together, and the two are At least the lubricant-containing rubber or synthetic resin layer of the various types of layers is provided with a seal lip portion that comes into contact with the outer surface of the guide rail and seals the opening in the gap between the inner surface of the slider and the outer surface of the guide rail. There is. Even in the second conventional example, since the seal lip portion has self-lubricating property, the lubricant contained in the seal itself gradually exudes and is automatically supplied to the seal friction surface. Further, it is possible to obtain the effect that the wear of the seal lip portion is suppressed. Moreover, since the above-mentioned structure is formed by stacking layers, there is an advantage that the strength of the seal lip portion can be freely set according to the application etc. by appropriately selecting the stacking number and thickness of each layer.

[0004]

Certainly, in the structure of the first conventional example or the second conventional example, since the seal lip portion has self-lubricating property, as described above, Although the effect of suppressing wear can be obtained, a ball that guides the movement of the slider of a linear motion guide bearing device when durability is particularly required only with a lubricant exuding from a lubricant-containing rubber or synthetic resin. There is an unsolved problem that it is insufficient to maintain even smooth rolling motion of rolling elements such as rollers.

Further, in the lubricant-containing seal devices of the first conventional example and the second conventional example, since the seal lip portion is pressed against the guide rail only by the elastic force of the seal itself, it is sufficient as a seal. Although a sufficient pressing force can be obtained, a sufficient pressing force may not be obtained as a device for supplying a lubricant. The present invention has been made by paying attention to the unsolved problem of the conventional technique, and constantly supplies a lubricant capable of maintaining smooth rolling motion of rolling elements. It is an object of the present invention to provide a linear motion guide bearing device capable of performing the above.

[0006]

To achieve the above object, the invention according to claim 1 is characterized in that a slider is loosely fitted to a guide rail that has a rolling element rolling groove on the outer surface and extends in the axial direction. The slider is a rolling element circulation path including a load rolling element rolling groove facing 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 linear guide bearing device in which a number of rolling elements that relatively move the slider along the guide rail are loaded in the rolling element circulation path, a lubricant-containing member made of rubber or synthetic resin containing a lubricant. Is attached to the end portion of the slider while being sandwiched between the end surface of the slider and the plate-like member and at least part of the lubricant containing member is in contact with the guide rail.

According to a second aspect of the present invention, in the linear guide bearing device according to the first aspect of the present invention, another plate member is provided between the end surface of the slider and the lubricant containing member. I caught it. The invention according to claim 3 is the linear guide bearing device according to claim 1 or 2, wherein the lubricant-containing member is deformed in a direction perpendicular to the axial direction of the guide rail. It was decided to have attachment means that would be possible.

Further, the invention according to claim 4 is the linear guide bearing device according to claim 1 or 2, wherein the lubricant-containing member is substantially U-shaped across the guide rail. At the same time, a biasing means for generating a biasing force for pressing the inner surfaces of the U-shaped sleeve portions of the lubricant containing member against the guide rails is provided. According to a fifth aspect of the invention, in the linear guide bearing device according to the fourth aspect of the invention, the U-shaped concave portion of the lubricant-containing member is in a state where no external force is applied to the lubricant-containing member. The inner bottom surface has an arcuate shape in which the central portion projects more than the sleeve portion side.

According to the first aspect of the invention, the lubricant-containing member is arranged so as to be sandwiched between the slider end surface and the plate member and in contact with the guide rail.
When the slider and the slider move together along the guide rail, the lubricant that gradually exudes over time from the lubricant-containing member is reliably supplied to the guide rail, and the lubricant supplied to the guide rail is It is supplied to the rolling elements through the surface and rolling grooves of the rolling elements.

Further, since the lubricant-containing member itself is sandwiched between the slider end surface and the plate-like member, unlike the case where the seal lip portion contains the lubricant, the rolling element is kept rolling for a long time. It is easy to make a size that allows a sufficient amount of lubricant to be contained therein, and the labor for adhering the lubricant-containing member to a steel plate or the like is unnecessary, so that assembly is easy.

In the invention according to claim 2, since another plate-shaped member is sandwiched between the lubricant-containing member and the slider end surface, the lubricant-containing member is composed of two plate-shaped members. It is attached to the end surface of the slider while being sandwiched. Even with such a structure, the same operation as the invention according to claim 1 can be obtained. In the invention according to claim 3, since the lubricant-containing member is attached so that the deformation in the direction orthogonal to the guide rail is allowed, even if the lubricant-containing member is worn, the lubricant-containing member is attached. It is possible to constantly contact the guide rail.

In the invention according to claim 4, when the lubricant exudes from the lubricant containing member straddling the guide rails, the lubricant containing member itself contracts. As the distance between the sleeves becomes shorter,
Due to the urging force generated by the urging means, the U-shaped sleeve inner side surfaces of the lubricant-containing member (the surfaces facing the side surfaces of the guide rail) are pressed against the guide rail, so that the lubricant-containing member is always attached to the guide rail. Get in touch. Also,
When the urging means generates the urging force, no gap is generated between the guide rail and the lubricant containing member even if the lubricant containing member has some manufacturing error. Therefore, the lubricant that has exuded from the lubricant-containing member can be stably supplied to the guide rail.

In the invention according to claim 5, since the bottom surface of the U-shaped concave portion of the lubricant-containing member has a predetermined arc shape, the lubricant-containing member is urged by the urging force of the urging means.
Even if both sleeves are deformed in the direction in which they are pressed against the guide rail, the arcuate shape is conversely approaching a horizontal state, so that the lubricant-containing member is in stable contact with the guide rail. Hereinafter, the material of the lubricant-containing member of the present invention will be described in detail.

First, in the case of a lubricant-containing member obtained by adding a lubricant to rubber, for example, polyurethane rubber cured in the state of containing grease can be applied. Polyurethane rubber is a compound produced by the reaction of a polyisocyanate and an active hydrogen compound, and as the 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 and polyamino compounds. Short chain active hydrogen compounds such as compounds can be used. As the grease, ordinary grease such as mineral oil lithium soap grease can be used.

Next, when a lubricant is contained in a synthetic resin to form a lubricant-containing member, the lubricant-containing member has basically the same chemical structure such as polyethylene, polypropylene, polybutylene, and polymethylpentene. Synthetic resins selected from the group of polyolefin resins include paraffin hydrocarbon oils such as poly α-olefin oils, naphthene hydrocarbon oils, mineral oils, ether oils such as dialkyldiphenyl ether oils, and phthalate esters as lubricants. A material prepared by injection molding of a raw material prepared by mixing any one of such ester oils or the like in the form of a mixed oil can be applied, and an antioxidant, a rust inhibitor,
It is possible to add various additives such as antiwear agents, antifoam agents and extreme pressure agents.

The composition ratio of the lubricant-containing member is 20 to 80% by weight of polyolefin resin and 80 to 20% by weight of lubricant with respect to the total weight. 20 polyolefin resin
When the content is less than wt%, hardness, strength, etc. above a certain level cannot be obtained. 80% by weight of polyolefin resin
If the amount exceeds the above range (that is, if the amount of the lubricant is less than 20% by weight), the amount of the lubricant supplied decreases, and the effect of reducing the wear of the lip portion of the sealing device decreases.

The groups of the above 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
Those with relatively low molecular weight of ³ to 1 × 10 ⁶ and 1 × 1
An ultrahigh molecular weight compound of 0 ^{6 to} 5 × 10 ⁶ is used alone or as a mixture if necessary. In order to improve the mechanical strength of the lubricant-containing member of the present invention, the following thermoplastic resin and thermosetting resin may be added to the above polyolefin 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. As the thermosetting resin, unsaturated polyester resin, urea resin, melamine resin, phenol resin, polyimide resin,
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 compatibilizing agent may be added if necessary. In addition, a filler may be added to improve mechanical strength.
For example, calcium carbonate, magnesium carbonate, inorganic whiskers such as potassium titanate whiskers and aluminum borate whiskers, or glass fibers and asbestos,
Inorganic fibers such as metal fibers and those obtained by braiding these into a cloth shape, and as an organic compound, carbon black, graphite powder, carbon fibers, aramid fibers, polyester fibers or the like may be added.

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

The addition amount of all of the above additives (other than polyfrefin + oil) is preferably 20% by weight or less of the total amount of the forming raw materials in order to maintain the lubricant supplying ability. .

[0023]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show a first embodiment of the present invention.
It is a figure showing an embodiment. First, the structure will be described. In the linear motion guide bearing device of the present embodiment, as shown in FIG. 1 which is a perspective view thereof, rolling element rolling grooves 3A and 3B are formed on the outer surface.
And a slider 2 that is assembled so as to straddle the guide rail 1.

Specifically, one rolling element rolling groove 3A formed of an axial concave groove having a substantially 1/4 arc shape in cross section is formed at a ridge portion where the upper surface 1a and both side surfaces 1b of the guide rail 1 intersect. At the same time, the other rolling element rolling groove 3B having a substantially semicircular cross section is formed at an intermediate position on both side surfaces 1b of the guide rail. At the groove bottom of the rolling element rolling groove 3B, there is formed an escape groove 3a of the cage for preventing the rolling element from falling off when the slider 2 is not assembled to the guide rail 1.

On the other hand, the slider 2 comprises a slider body 2A and end caps 2B attached to both ends of the slider body 2A. The slider body 2A is formed on the inner surface of both sleeves 4 with rolling element rolling grooves 3A of the guide rail 1. It has a load rolling element rolling groove (not shown) facing 3B, and a rolling element return path that penetrates the thick portion of the sleeve portion in the axial direction. On the other hand, the end cap 2B has a curved path (not shown) that communicates the rolling element rolling groove of the slider body 2A with the rolling element returning path parallel to the rolling groove. A rolling element circulation circuit is formed by the path and the curved paths at both ends. A large number of rolling elements made of, for example, steel balls are loaded in the rolling element circulation circuit. In the figure, 7 is a grease nipple.

The end cap 2B is an injection-molded product made of a synthetic resin material, and has a substantially U-shaped cross section. And
As shown in FIG. 2, which is a perspective view showing the assembled state of the end portion of the slider 2, the reinforcing plate 10 as a plate member is provided on the outer surface side of each of the end caps 2B from the side close to the end caps 2B. The lubricant containing member 11 and the side seal 12 as a plate-like member are fixed in a superposed state.

Of these, the reinforcing plate 10 is a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B,
Through-holes 10a and 10b for penetrating a mounting screw are formed in both sleeve portions 10A and 10B, and a through-hole 10c for a grease nipple is formed in a connecting portion 10C connecting both sleeve portions 10A and 10B. Has been formed. The reinforcing plate 10 is not in contact with the guide rail 1.

The side seal 12 has a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B, and a polyurethane similar in shape to the steel plate and containing an integrally molded grease on the outer surface thereof. Composed of rubber and. The lip portion 13 of the side seal 12 that comes into contact with the guide rail 1 is guided along the cross-sectional shape of the guide rail 1 so that the inner surface thereof can seal the gap between the slider 2 and the guide rail 1. Top 1 of rail 1
a and a shape capable of sliding contact with the outer side surface 1b, more specifically,
The rolling element rolling grooves 3A and 3B and the escape groove 3a are also formed in a shape capable of sliding contact. It should be noted that the sleeve 12A, 12B of the side seal 12 also has a through hole 1 through which a mounting screw penetrates.
2, 12b are formed, and both sleeve portions 12 are formed.
A through hole 12c for a grease nipple is formed in a connecting portion 12C that connects A and 12B.

The lubricant-containing member 11 sandwiched between the side seal 12 and the reinforcing plate 10 is formed in a substantially U shape conforming to the outer shape of the end cap 2B, and the inside of the U shape is formed. Has a flat shape instead of a tapered shape, and like the inner surface of the lip portion 13, the upper surface 1 of the guide rail 1 matches the cross-sectional shape of the guide rail 1.
It has a shape capable of sliding contact with the outer side surface 1b including a and the rolling element rolling grooves 3A and 3B.

Further, as shown in FIG. 3 (a) which is a front view and FIG. 3 (b) which is a side view of the lubricant containing member 11, both sleeve portions 11A and 11B of the lubricant containing member 11 are provided. Also, through holes 11a and 11b for penetrating the mounting screw are formed, and a through hole 11c for a grease nipple is formed in a connecting portion 11C that connects the sleeve portions 11A and 11B. Each of 11a and 11b is open to the outer surface side of the sleeve portions 11A and 11B, and the through hole 11c is open to the upper surface side of the connecting portion 11C.

The inner surface of the recess of the lubricant containing member 11 is the upper surface 1a of the guide rail 1 and the rolling element rolling grooves 3A, 3A.
The groove 3A is formed in such a size as to be in sliding contact with the outer side surface 1b including B, and the groove 3A, 3B is formed in the recess inner surface of the guide rail 1 facing the rolling element rolling grooves 3A and 3B. The convex portion 1 is slidably contacted with the inner surfaces of 3B and 3a.
1f, 11g, 11d and 11e are formed. Further, among the inner surfaces of the concave portion of the lubricant containing member 11, the inner bottom surface 11h that is in sliding contact with the upper surface 1a of the guide rail 1 is attached to the sleeve portions 11A and 11B in a state where no external force is applied to the lubricant containing member 11. It has an arcuate shape with a radius of curvature R so that the central portion side projects downward more than the closer end portion side.

Both sleeve portions 11 of the lubricant containing member 11
Ring-shaped members 15A and 15B are fitted into the through holes 11a and 11b formed in A and 11B, respectively. The ring-shaped members 15A and 15B are
4A that is a front view thereof and FIG. 4 that is a side view thereof.
It is a short cylindrical member as shown in (b), and its outer diameter is such that it can be easily fitted into the through holes 11a and 11b.

Further, the connecting portion 11C of the lubricant containing member 11
The ring-shaped (or solid columnar) member 16 is also fitted into the through hole 11c formed in. The ring-shaped member 16 is also a short cylindrical member as shown in FIG. 5 (a) which is a front view thereof and FIG. 5 (b) which is a side view thereof. However, the outer diameter D _AR of the ring-shaped member 16 is larger than the inner diameter D _A of the through hole 11c. That is, by fitting the ring-shaped member 16 into the through hole 11c, the through hole 11c can be expanded.

Further, the length V of the ring-shaped members 15A, 15B and 16 is larger than the thickness W of the lubricant-containing member 11.
It is slightly longer (for example, about 0.2 mm). That is, the ring-shaped members 15A, 15B and 16 are connected to the through hole 11
When fitted into a to 11c, as shown in FIG. 6, the ends of the ring-shaped members 15A, 15B, and 16 project from the front surface or the back surface of the lubricant-containing member 11.

The reinforcing plate 10, the lubricant-containing member 11 and the side seal 12 have side mounting screws 17A and 17B which are screwed into the main body 2A through the through holes 2a and 2b of the end cap 2B. 12 through holes 12
a, 12b, through holes 11a, 11 of the lubricant containing member 11
By penetrating the ring-shaped members 15A and 15B on the inner side of b and the through holes 10a and 10b of the reinforcing plate 10, the end cap 2B and the end cap 2B are fixed to the main body 2A.

Next, the operation of the present embodiment will be described. That is, when the slider 2 moves on the guide rail 1 fixed to the machine base, the rolling elements in the slider 2 move in the moving direction of the slider 2 at a slower speed than the slider 2 while rolling in the rolling element rolling path. The circulation is repeated by making a U-turn on the curved path on the one end side to move while rolling in the reverse direction on the rolling element return path, and making a reverse U-turn on the curved path on the other end side to return to the rolling element rolling path.

When the linear guide bearing device is driven in this way, the lubricant containing member 11 also moves while contacting the guide rail 1, and the effect of frictional heat at the time of the movement is also added to lubricate the lubricant containing member 11. The agent gradually exudes over time, but the exuded lubricant rolls in the rolling element rolling grooves 3A, 3B of the guide rail 1, particularly through the rolling element rolling grooves 3A, 3B. It is automatically supplied to the rolling elements. Due to this self-lubricating property, stable and smooth operation is performed for a long time. Therefore, in particular, a lubricant is externally added to the slider 2
It is possible to continue a good operation with a low torque for a long time even if it is not supplied to.

Further, since the shape of the inner surface of the recess of the lubricant containing member 11 is matched with the cross sectional shape of the guide rail 1 as described above, as shown in FIG.
Can adhere to the upper surface 1a and the side surface 1b of the guide rail 1, and as the lubricant exudes from the lubricant containing member 11, the lubricant containing member 11 itself contracts. By the contracting force, it is possible to obtain an effect that the sealed surface of the guide rail 1 is always brought into close contact with the sealed surface to fulfill the sealing function and the lubricating function.

In the case of the present embodiment, the lubricant containing member 11
Since the side seal 12 is used as the plate-shaped member on the outer surface of, the sealability is further improved. Particularly, in the present embodiment, since the upper surface side of the through hole 11c formed in the connecting portion 11C of the lubricant containing member 11 is cut out and opened,
As shown in FIG. 8A, since the sleeve portions 11A and 11B can be easily spread to the left and right, the work of attaching the lubricant containing member 11 across the guide rail 1 can be easily performed.

A ring-shaped member 16 having an outer diameter larger than the inner diameter is fitted into the through hole 11c as a biasing means, so that the lubricant-containing member 11 is guided as shown in FIG. 8 (b). When the rail 1 is straddled, the ring-shaped member 16 pushes the through hole 11c to the left and right to generate a biasing force that pushes the sleeve portions 11A and 11B against the guide rail 1. Therefore, even if there is a slight manufacturing error in the dimensions of the lubricant-containing member 11, the lubricant-containing member 1
Even if 1 wears to some extent, the lubricant-containing member 11 can be more surely brought into close contact with the surface to be sealed of the guide rail 1 in a reliable manner. In this case, in the structure in which the upper surface side of the through hole 11c is notched and opened, the force of the ring-shaped member 16 for spreading the sleeve 11A and 11B is converted into the urging force for pressing the sleeve 11A and 11B against the guide rail 1. It is very advantageous for the operation.

Moreover, the length V of the ring-shaped members 15A, 15B and 16 is made larger than the thickness W of the lubricant-containing member 11 so that the end portions of the ring-shaped members 15A, 15B and 16 are made into the lubricant-containing member. Since the mounting means for the lubricant-containing member 11 is configured so as to protrude from the front surface or the back surface of the lubricant 11, the lubricant-containing member 11 is sandwiched between the reinforcing plate 10 and the side seal 12, Friction between and is reduced. Therefore, the lubricant-containing member 11 is smoothly deformed in the direction perpendicular to the axial direction of the guide rail 1 due to the self-shrinkage or the urging force described above. Can be closely attached.

Further, since the inner bottom surface 11h of the concave portion of the lubricant containing member 11 is formed into the arc shape as described above, the sleeve portions 11A and 11B of the lubricant containing member 11 are guided by the guide rail 1 by the above-mentioned self-contraction and biasing force. When deformed in the direction of being pressed against, the inner bottom surface 1h approaches a horizontal state,
The inner bottom surface 1h comes into stable contact with the upper surface 1a of the guide rail 1.

The lubricant-containing member 11 is used as the reinforcing plate 10.
Also, since it is a member that is sandwiched between the side seals 12, it is easy to make the size sufficient to contain a sufficient amount of lubricant for maintaining rolling of the rolling elements for a long period of time. Moreover, since the lubricant-containing member 11 is not structured to be fixed to another member such as a steel plate, it is possible to reduce the cost of parts of the lubricant-containing member 11 that is a consumable item, and the labor for disposing the product is simple. The advantage is that

Then, the lubricant-containing member 11 is attached to the reinforcing plate 1
0 and the side seal 12 are disposed so as to be sandwiched between them, so that the portion of the side seal 12 that comes into contact with the guide rail 1, that is, the lip portion 13 is difficult to roll up even if the slider 2 reciprocates. Leakage of internal grease to the outside is also reduced. Further, the lubricant that has exuded from the lubricant-containing member 11 is also supplied to the lip portion 13 of the side seal 12 that contacts the guide rail 1,
It also serves to reduce the wear of the lip portion 13, and in particular, in the present embodiment, since the lip portion 13 is molded from polyurethane rubber which is hardened in the state of containing grease, the lubricant itself is also formed. It is supplied, and wear of the lip portion 13 can be further reduced. Then, since the wear of the lip portion 13 is minimized, the sealing performance of the lip portion 13 is maintained for a long period of time, foreign matter is prevented from entering the main body 2A side, and the life of the linear motion guide bearing device itself is extended. There is an advantage that it can be achieved.

With the structure of this embodiment, since the lubricant for the rolling elements is constantly supplied from the lubricant containing member 11, the grease nipple mounting hole may be closed with a blind plug. If necessary, a lubricant such as grease may be supplied into the slider by opening it at a proper time. Here, in the present embodiment, the side seal 12 corresponds to a plate-shaped member, the reinforcing plate 10 corresponds to another plate-shaped member, and the ring-shaped member 16 corresponds to a biasing means.

9 and 10 are diagrams showing a second embodiment of the present invention. The same members and portions as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, in the present embodiment, the shape of the lubricant containing member 11 is changed in the linear motion guide bearing device having the same structure as that of the first embodiment.

Specifically, as shown in FIG. 9 which is a front view of the lubricant containing member 11, the sleeve portions 11A and 11B are continuous with the through holes 11a and 11b through which the mounting screws penetrate and the sleeve portion 11A. And the cutouts 20A and 20B are formed so that the outer side surface and the front end side of 11B are opened, and the ring-shaped member 15 fitted into the through holes 11a and 11b.
The inner diameters of A and 15B are made larger than the outer diameters of the threaded portions of the mounting screws 17A and 17B. Other configurations are similar to those of the first embodiment.

With such a structure, a front view of the lubricant containing member 11 straddling the guide rail 1 is shown in FIG.
As shown in, when the mounting screws 17A and 17B are loosened,
Since the ring-shaped members 15A and 15B can move outward,
Only the lubricant containing member 11 can be removed from the linear guide bearing device by pulling it upward. Further, the new lubricant-containing member 11 can also be fitted from above the guide rail 1 without removing the side seal 12 and the like from the main body 2A, and the ring-shaped members 15A and 15B can be pushed inward to penetrate the through holes 11a, The lubricant-containing member 11 can be mounted by tightening the mounting screws 17A and 17B after being positioned inside 11b.

That is, according to the configuration of this embodiment, the lubricant-containing member 11 in which the lubricant has sufficiently exuded can be easily replaced with a new lubricant-containing member 11.
With the cassette method, lubricant can be replenished with a simple labor and without soiling the hands. Other functions and effects are similar to those of the first embodiment.

11 to 17 are views showing a third embodiment of the present invention. The same members and parts as those in each of the above-described embodiments are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in the present embodiment, the structure for generating the urging force for pressing the sleeve portions 11A and 11B of the lubricant containing member 11 against the guide rail 1 is different from that of the first embodiment. is there.

Specifically, FIG. 11 which is a perspective view showing an assembled state of the end portion of the slider 2 and the lubricant containing member 11
12 (a), which is a front view of FIG.
As shown in (b), the through hole 11 of the lubricant containing member 11
While omitting c, a groove 30 continuous in a substantially U-shape is formed on the surface of the lubricant-containing member 11 on the side seal 12 side so as to surround the recess of the lubricant-containing member 11. FIG. 13 is a front view in FIG.
An elastic body 31 as an urging means as shown in (a) and a bottom view (b) is fitted.

The elastic body 31 is an elastically deformable member made of steel, synthetic resin or hard rubber, and is formed in a substantially U-shape in accordance with the shape of the concave groove 30. The U-shaped opening side is narrowed slightly when no external force is applied. Other configurations are the same as those of the first embodiment. However, in the present embodiment, corresponding to the omission of the through hole 11c of the lubricant containing member 11, the through hole 10c of the reinforcing plate 10 and the through hole 12c of the side seal 12 are also omitted, and the grease nipple is installed. Although not provided, each through hole 10c, 11c, 12c is formed as in the first embodiment,
Normally, the grease nipple mounting hole may be closed by a blind plug, and if necessary, the hole may be opened to supply a lubricant such as grease into the slider.

In the case of the structure of this embodiment, the elastic force of the elastic body 31 in the groove 30 causes the elastic force of FIG.
As shown in FIG.
A biasing force that presses 1B against the guide rail 1 is generated, and as shown in FIG. 15, when the lubricant containing member 11 is attached, the sleeve portions 11A and 11B can be spread to the left and right. Therefore, as shown in FIG. 16, the lubricant containing member 11 can be stably brought into close contact with the guide rail 1. In particular, the shape of the elastic body 31 when no load is applied is such that the distance between the tip ends of the elastic body 31 is narrowed. Therefore, even if the lubricant-containing member 11 is worn to some extent, the inner surfaces of the sleeve portions 11A and 11B can be more reliably guided. Can be pressed against. Also,
As shown in FIG. 17, the ring-shaped members 15A and 15B project from the surface of the lubricant-containing member 11 as in the first embodiment, so that the lubricant-containing member 11 can be smoothly deformed. ing.

From the above, even with the configuration of this embodiment, the same operational effect as that of the first embodiment can be obtained. Moreover, the elastic body 31 that generates the urging force is arranged so as to surround the concave portion of the lubricant containing member 11, and the elastic body 3 is provided.
Since the tip portion of No. 1 reaches the vicinity of the tip portions of the sleeve portions 11A and 11B, there is an advantage that the biasing force of the elastic body can be more reliably transmitted to the sleeve portions 11A and 11B.

FIG. 18 is a diagram showing a fourth embodiment of the present invention. FIG. 18 (a) is a front view of the lubricant containing member 11 and FIG. 18 (b) is an A- line of the same. It is an A line sectional view.
That is, the configuration of the fourth embodiment is basically the same as that of the third embodiment, except that the upper surface of the connecting portion 11C of the lubricant containing member 11 is opened upward. The points are formed by forming a substantially rectangular notch 11D.

When such a notch 11D is formed, the rigidity of the connecting portion 11C becomes low, so that the elastic force of the elastic body 31 is effectively converted into a biasing force for pressing the sleeve portions 11A and 11B against the guide rail 1. Therefore, the lubricant containing member 11 can be more surely brought into close contact with the guide rail 1. Other functions and effects are similar to those of the third embodiment.

19 to 22 are views showing a fifth embodiment of the present invention. The same members and parts as those in each of the above-described embodiments are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in the present embodiment, as shown in FIG. 19 (a) which is a front view and FIG. 19 (b) which is a side view of the lubricant-containing member 11, the lubricant-containing member 11 has an outer peripheral surface. Outer surfaces of the sleeve portions 11A and 11B and the connecting portion 11C
A continuous outer peripheral groove 33 is formed on the upper surface of the. It should be noted that at both ends of the outer peripheral groove 33, recesses 33a that enter the inside of the sleeve portions 11A and 11B are formed.

Then, an elastic body 34 as a biasing means as shown in FIG. 20 is fitted in the outer peripheral groove 33. The elastic body 34 has the same size as that of the elastic body 31 described in the third embodiment except that the elastic body 34 has a large size and has a convex portion 34a fitted into the recess 33a at the tip. It has the same configuration. Even with such a configuration, as shown in FIG.
Since the elastic body 34 urges the sleeve portions 11A and 11B toward the guide rail 1, the lubricant-containing member 11 can be stably brought into close contact with the guide rail 1, and as shown in FIG. 21 (b). Since the ring-shaped members 15A and 15B project from the surface of the lubricant containing member 11 as in the first embodiment, the lubricant containing member 11 can be smoothly deformed. Therefore, also in the fifth embodiment, the same operational effect as the third embodiment can be obtained.

With the configuration of this embodiment, as shown in FIG. 22, only the elastic body 34 can be attached or detached without loosening or removing the attaching screws 17A and 17B. For this reason, since the elastic body 34 can be attached after assembling all the parts, when it is not necessary to press the lubricant containing member 11 against the guide rail 1, the elastic body 34 is removed, and when it is necessary to press it. The elastic body 34 can be attached only, or the elastic body 34 can be replaced when the pressing force of the lubricant containing member 11 against the guide rail 1 is desired to be changed.

Therefore, for example, a new lubricant-containing member 1
Immediately after the start of use of 1, the lubricant-containing member 11 hardly wears and can be sufficiently adhered without attaching the elastic body 34, but when the elastic body 34 is attached, stains of the lubricant are not formed. Since there is a possibility that the amount of protrusion is too large, the elastic body 34 is removed. Then, when the wear progresses and the adhesiveness deteriorates, the elastic body 34 is attached so that the elastic body 34 is sufficiently adhered, and in some cases, when the wear further progresses, the elastic body 34 having a stronger elastic force is replaced. For example, it is possible to stabilize the amount of lubricant exuded immediately after the start of use until just before replacement.

Further, in this embodiment, since the recesses 33a are formed at both ends of the outer peripheral groove 33, and the projections 34a which fit into the recesses 33a are formed at the ends of the elastic body 34, the elastic body 34 is formed. Even if it is configured to be fitted from the outside, the elastic body 34 does not easily fall off or shift in the removal direction. FIG. 23 is a view showing the sixth embodiment of the present invention and is a front view of the lubricant containing member 11.

That is, the structure of the sixth embodiment is basically the same as that of the above-mentioned third embodiment, except that the upper surface of the connecting portion 11C of the lubricant containing member 11 has an upper surface. This is a point where a substantially rectangular notch 11D that is open to the outside is formed, which makes it possible to obtain the same effect as that of the fourth embodiment. Other functions and effects are similar to those of the fifth embodiment.

24 to 26 are views showing a seventh embodiment of the present invention. The same members and parts as those in each of the above-described embodiments are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in the present embodiment, as shown in FIG. 24, which is a front view of the lubricant containing member 11, the lubricant containing member 1 is attached to the connecting portion 11C of the lubricant containing member 11.
A straight groove 37 extending in the width direction 1 is formed.
Then, an elastic body 38 as a biasing means as shown in FIG. 25 (a) which is a front view and FIG. 25 (b) which is a bottom view is fitted into the groove 37.

The elastic body 38 is a thin prismatic elastic body made of steel, synthetic resin or hard rubber slightly curved in a V shape, and is a front view of FIG. 26 (a) and a side view of FIG. As shown in (b), the shape is curved in the opposite direction, and the groove 37 is fitted into the groove 37.
Even with such a configuration, the elastic restoring force of the elastic body 38 tends to bend the connecting portion 11C of the lubricant-containing member 11 inward, so that the biasing force that presses the sleeve portions 11A and 11B against the guide rail 1 is applied. Occur. Therefore, the same effect as the first embodiment can be obtained.

27 to 29 are views showing an eighth embodiment of the present invention. The same members and parts as those in each of the above-described embodiments are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in the present embodiment, as shown in FIG. 27, which is a front view of the lubricant-containing member 11, a rectangular through hole 39 that is long in the left-right direction is formed in the connecting portion 11C of the lubricant-containing member 11. are doing. In addition, the lubricant-containing member 1
A notch 11 </ b> E is formed on the upper side of 1 so as to communicate with the through hole 39.

A coil spring 40 as an urging means as shown in FIG. 28 (a) which is a front view and FIG. 28 (b) which is a side view is slightly compressed with its extension / contraction direction oriented in the left / right direction. Fig. 29 (a), which is a front view in the state
And as shown in FIG. 29 (b) which is a partially cutaway side view,
It is accommodated in the through hole 39. Even with such a configuration, the notch 11E reduces the rigidity of the connecting portion 11C in the left-right direction, and the elastic restoring force of the coil spring 40 causes the connecting portion 11C of the lubricant-containing member 11C.
Since C tends to be pushed to the left and right, the sleeve portion 11A,
A biasing force that pushes 11B against the guide rail 1 is generated.
Therefore, the same effect as the first embodiment can be obtained.

FIG. 30 is a diagram showing a ninth embodiment of the present invention. FIG. 30 (a) is a front view and FIG. 30 (b) is a partially cutaway side view. The same members and parts as those in each of the above-described embodiments are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in the present embodiment, the slit 41 that extends vertically in the sleeve portions 11A and 11B of the lubricant-containing member 11 and opens to the tip side of the sleeve portions 11A and 11B.
A and 41B are formed and the slips 41A and 4B are formed.
In the middle of 1B, a rectangular through hole 42A that is long in the left-right direction,
42B is formed, and coil springs 43A and 43B are housed in the through holes 42A and 42B as biasing means in a state in which the direction of expansion and contraction is in the left-right direction and slightly compressed.

Even with such a structure, the slit 41
The rigidity of the connecting portion 11C in the left-right direction is reduced by A and 41B, and the coil springs 43A and 43A
Since the elastic restoring force of B acts as a biasing force for pressing the sleeve portions 11A and 11B against the guide rail 1 as it is, it is possible to obtain the same operational effect as that of the first embodiment. 31 is a diagram showing a tenth embodiment of the present invention.
(A)-(d) is a perspective view which shows the modification of the ring-shaped member 16 fitted in the through-hole 11c of the lubricant containing member 11. The configuration other than the ring-shaped member 16 is the same as that of the first
This is the same as the embodiment.

That is, in the present embodiment, the ring-shaped member 16 as a biasing means formed from a deformable material such as metal or polymer material (plastic, rubber, etc.).
A slit 16a extending in the axial direction is formed on the outer peripheral surface of the. Then, similarly to each of the above-described embodiments, the through hole 11
The inner diameter of c is made slightly smaller than the outer diameter of the ring-shaped member 16, and the through-hole 11c is formed in a state in which the ring-shaped member 16 is reduced in diameter.
However, since the slit 16a is formed, the elastic deformation in the direction in which the diameter of the ring-shaped member 16 expands and contracts can be made larger and smoother. Then, since the action of expanding the through hole 11c can be stably obtained over a long period of time, the sleeve portion 11
The urging force that presses A and 11B against the guide rail 1 is maintained for a long period of time, and it is possible to more reliably obtain the same operational effect as that of the first embodiment.

The expanding action of the ring-shaped member 16 in the state of being fitted in the through hole 11c is determined by the size and number of the slits 16a formed therein, the wall thickness and material of the ring-shaped member 16, etc. Since the urging force for pressing the sleeve portions 11A and 11B against the guide rail 1 and the wear limit amount of the lubricant containing member 11 are determined by the deformation characteristics of the ring-shaped member 16, each of the above factors is related to the size of the linear guide bearing device to be applied. It is necessary to appropriately select depending on the sheath specifications, the rigidity of the lubricant containing member 11, and the like. Therefore, the number of slits 16a and the like are not limited to the examples shown in FIGS. 31 (a) to 31 (d), but are completely arbitrary.

FIG. 32 is a view showing a modified example of the tenth embodiment. Instead of the ring-shaped member 16, a solid columnar member 16A as a biasing means is used as a through hole 11c.
The cylindrical member 1
A slit 16b is formed in 6A so that the diameter can be increased or decreased. Then, even if such a columnar member 16A is used, the same operational effect as when the ring-shaped member 16 as shown in FIG. 31 is used can be obtained. Since the diameter expanding action of the columnar member 16 is determined by the material thereof, the size and the number of the slits 16b, and the like, as in the case of the ring-shaped member 16, each of these factors depends on the linear motion guide to be applied. It is necessary to properly select the bearing device according to the size and specifications of the bearing device, the rigidity of the lubricant containing member 11, and the like. Therefore, the size, number, etc. of the slits 16b are not limited to the examples shown in FIGS. 32 (a) to 32 (c), but are completely arbitrary.

FIG. 33 is a view showing an eleventh embodiment of the present invention and is a front view of the lubricant containing member 11 in a state of straddling the guide rail 1. The same members and parts as those in each of the above-described embodiments are designated by the same reference numerals, and the duplicate description thereof will be omitted. That is, in the present embodiment, the sleeve portions 11A and 11B of the connecting portion 11C of the lubricant containing member 11 are both.
A total of two through holes 11c are formed at the above positions, and the slits 16 shown in the tenth embodiment are formed in each through hole 11c.
The ring-shaped member 16 having a is fitted.

Even if the through hole 11c and the ring-shaped member 16 are provided in a plural number as described above, the connecting portion 11C of the lubricant containing member 11 tends to be curved inward by the expanding force of the ring-shaped member 16. Therefore, a biasing force that presses the sleeve portions 11A and 11B against the guide rail 1 is generated. Therefore, the same effect as the first embodiment can be obtained. It should be noted that three or more through holes 11c may be formed, and instead of the ring-shaped member 16, a cylindrical member 16A as shown in FIG. 32 may be fitted into the plurality of through holes 11c.

In the above embodiment, the lip portion 13
However, since the lubricant is supplied from the lubricant-containing member 11 to the lip portion 13, the lip portion 13 is made of NBR (acrylonitrile butane) containing no lubricant. Gidene rubber). Further, in the configuration of each of the above embodiments,
The reinforcing plate 10 may be omitted, and the lubricant containing member 11 may be disposed by being sandwiched between the end cap 2B and the side seal 12, or the lubricant containing member 11 substantially functions as a sealing device. Instead of the side seal 12, a steel plate similar to the reinforcing plate 10 may be arranged as a reinforcing plate or protector. In some cases, the lubricant-containing member 11
A side seal 12 may be provided between the end cap 2B and the end cap 2B instead of the reinforcing plate 10.

Furthermore, in each of the above embodiments, the length V of the ring-shaped members 15A, 15B, 16 is made larger than the thickness W of the lubricant containing member 11, but the length V is equal to the thickness W. Or it may be slightly smaller. In short, when the lubricant-containing member 11 is fixed by tightening the mounting screws 17A and 17B, the screws 17A and 17B are tightened too much and the lubricant-containing member 11 is moved in a direction perpendicular to the axial direction of the guide rail 1. It suffices that there is a relationship between the length V and the thickness W that does not prevent the deformation of the.

Further, the linear guide bearing device to which the present invention can be applied is not limited to the type of the above-described embodiment, and for example, the load rolling element rolling groove may be other than the one-sided two-way rolling element. The moving body may be, for example, a roller instead of the ball.

[0077]

As described above, according to the first and second aspects of the present invention, the lubricant that exudes gradually from the lubricant-containing member over time is supplied to the rolling elements through the guide rails. Therefore, there is an effect that the smooth rolling of the rolling element can be maintained. In this case, in the case where the side seal is used as the plate-shaped member, wear of the contact surface of the side seal with the guide rail can be reduced by the lubricant from the lubricant-containing member, and the foreign matter can be transferred to the rolling element rolling groove. Can be prevented and the life of the linear guide bearing device can be further extended.

According to the third or fourth aspect of the invention, since the lubricant-containing member can be constantly brought into contact with the guide rail, the lubricant exuding from the lubricant-containing member is
There is an effect that it can be stably supplied to the rolling elements through the guide rails, and smooth rolling of the rolling elements can be more reliably maintained. According to the invention of claim 5, the lubricant-containing member can be stably brought into contact with the guide rail, so that the lubricant can be more stably supplied to the rolling elements via the guide rail. There is.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a mounting state of each member at the end portion of the linear guide bearing device.

FIG. 3 is a diagram showing a configuration of a lubricant-containing member according to the first embodiment.

FIG. 4 is a diagram showing a configuration of a ring-shaped member.

FIG. 5 is a diagram showing a configuration of a ring-shaped member.

FIG. 6 is a side view of the lubricant-containing member with a ring-shaped member attached.

FIG. 7 is a front view of the lubricant containing member in a state of straddling a guide rail.

FIG. 8 is an explanatory diagram of an operation.

FIG. 9 is a front view showing a configuration of a lubricant-containing member according to a second embodiment.

FIG. 10 is an explanatory diagram of an operation of the second embodiment.

FIG. 11 is a perspective view showing an attached state of each member at the end portion of the linear guide bearing device according to the third embodiment.

FIG. 12 is a diagram showing a configuration of a lubricant-containing member according to a third embodiment.

FIG. 13 is a diagram showing a configuration of an elastic body according to a third embodiment.

FIG. 14 is an explanatory diagram of the operation of the third embodiment.

FIG. 15 is an explanatory diagram of an operation of the third embodiment.

FIG. 16 is a front view of a lubricant-containing member in a state of straddling a guide rail according to a third embodiment.

FIG. 17 is a side view of the lubricant containing member with the ring-shaped member according to the third embodiment attached.

FIG. 18 is a diagram showing a configuration of a lubricant containing member according to a fourth embodiment.

FIG. 19 is a diagram showing a structure of a lubricant containing member according to a fifth embodiment.

FIG. 20 is a diagram showing a configuration of an elastic body according to a fifth embodiment.

FIG. 21 is a diagram illustrating an assembled state of the fifth embodiment.

FIG. 22 is a perspective view of a linear guide bearing device according to a fifth embodiment.

FIG. 23 is a front view showing a lubricant containing member according to a sixth embodiment.

FIG. 24 is a diagram showing a structure of a lubricant containing member according to a seventh embodiment.

FIG. 25 is a diagram showing a configuration of an elastic body according to a seventh embodiment.

FIG. 26 is a diagram illustrating an assembled state of the seventh embodiment.

FIG. 27 is a front view showing a lubricant-containing member according to an eighth embodiment.

FIG. 28 is a diagram showing a configuration of an elastic body according to an eighth embodiment.

FIG. 29 is a diagram illustrating an assembled state of the eighth embodiment.

FIG. 30 is a front view showing the configuration of the ninth embodiment.

FIG. 31 is a perspective view showing a tenth embodiment.

FIG. 32 is a perspective view showing a modified example of the tenth embodiment.

FIG. 33 is a front view showing the configuration of the eleventh embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 1a Upper surface 1b Side surface 2 Slider 2A Main body 2B End cap 3A, 3B Rolling element rolling groove 10 Reinforcing plate (plate member) 11 Lubricant containing member 11A, 11B Sleeve portion 11C Connecting portion 11a to 11c Through hole 12 Side Seal (plate-shaped member) 13 Lip portions 15A, 15B Ring-shaped member 16 Ring-shaped member (biasing means) 16A Cylindrical member (biasing means) 17A, 17B Mounting screw 20A, 20B Notch 31, 34, 38 Elastic Body (biasing means) 40, 43A, 43B Coil spring (biasing means)

Claims (5)

[Claims] 1. A slider is loosely fitted to a guide rail that has a rolling element rolling groove on its outer surface and extends in an axial direction, and the slider is a load rolling element rolling groove that opposes the rolling element rolling groove of the guide rail. And a rolling element circulation path composed of rolling element return paths connected to both ends of the load rolling element rolling groove via curved paths,
In a linear guide bearing device in which a large number of rolling elements that relatively move the slider along the guide rail are loaded in the rolling element circulation path, a lubricant-containing member made of rubber or synthetic resin containing a lubricant is used. A linear motion guide bearing device, characterized in that the linear guide bearing device is mounted on the end portion of the slider so as to be sandwiched between the end surface of the slider and a plate-shaped member and at least a part of the lubricant-containing member is in contact with the guide rail. . 2. The linear guide bearing device according to claim 1, wherein another plate-shaped member is sandwiched between the end surface of the slider and the lubricant-containing member. 3. The linear guide bearing device according to claim 1, further comprising mounting means for enabling the lubricant-containing member to be deformed in a direction perpendicular to the axial direction of the guide rail. 4. The lubricant-containing member is formed in a substantially U shape straddling the guide rail, and a biasing force is generated to press the inner surfaces of the U-shaped sleeve portions of the lubricant containing member against the guide rail. The linear guide bearing device according to claim 1 or 2, further comprising means. 5. The U-shaped concave inner bottom surface of the lubricant-containing member in the state where no external force is applied to the lubricant-containing member has an arcuate shape in which the central portion protrudes from the sleeve portion side. Linear motion guide bearing device.