JP2003156040A - Linear motion guide bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably feed the lubricant to a rolling element over a long time. SOLUTION: A reinforced plate 10, a lubricating oil-containing member 11 and a side seal 12 are fixed to an outer surface side of an end cap 2B in an overlapping manner from a side close to the end cap 2B. The reinforced plate 10, the lubricating oil-containing member 11 and the side seal 12 are fixed to a body 2A integrated with the end cap 2B by allowing fitting screws 17A and 17B to be screwed to the body 2A through holes 2a and 2b of the end cap 2B to pass through holes 12a and 12b of the side seal 12, through holes 11a and 11b of the lubricant containing member 11, and through holes 10a and 10b of ring-like members 15A and 15B and the reinforced plate 10 on the inner side. The thickness of the ring-like members 15A and 15B is slightly larger than the lubricant containing member 11.

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 having a plurality of rolling elements for moving the slider relatively along the guide rail in the rolling element circulation path, wherein the guide rail is made of rubber or synthetic resin containing a lubricant. A state in which a substantially U-shaped lubricant-containing member that straddles the above is sandwiched between the end surface of the slider and the plate-shaped member and at least a part of the lubricant-containing member is in contact with the guide rail. When attached with The said at both sleeves of U-shaped lubricant-containing member to form a-out hole or notch for fixing the lubricant-containing member to the slider, the insertion of the ring-shaped member in-out the holes or notches.

The invention according to claim 2 is the invention according to claim 1, wherein the connecting portion that connects the sleeve portions is penetrated through the connecting portion and is opened on the side opposite to the guide rail side. Through holes are formed. The invention according to claim 3 is the invention according to claim 1 or 2, wherein another plate-shaped member is sandwiched between the end surface of the slider and the lubricant-containing member.

According to a fourth aspect of the present invention, in the inventions according to the first to third aspects, the thickness of the ring-shaped member inserted into the holes or notches formed in the sleeve portions is set to the lubricant-containing member. Thicker than. In the present invention, the lubricant-containing member is sandwiched between the slider end surface and the plate-shaped member and arranged in contact with the guide rail, so that the lubricant-containing member moves along the guide rail together with the slider. Then,
The lubricant that gradually exudes over time from the lubricant-containing member is
The lubricant is reliably supplied to the guide rail, and the lubricant supplied to the guide rail is supplied to the rolling elements via the surface of the guide rail and the rolling element rolling grooves.

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 maintained for a long period of 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.

When the lubricant exudes from the lubricant-containing member straddling the guide rail, the lubricant-containing member itself contracts, so that the distance between the U-shaped sleeves of the lubricant-containing member is shortened. Become. Further, in the invention according to claim 2, since the through hole formed in the connecting portion is open to the side opposite to the guide rail side, both sleeve portions are deformed in the direction in which they are reliably pressed against the guide rail. To do.

The lubricant-containing member is fixed to the slider by a screw or the like inserted through a hollow ring-shaped member inserted in the holes or notches in the sleeves. In the invention according to claim 3, since another plate-shaped member is sandwiched between the lubricant-containing member and the slider end surface, the lubricant-containing member is sandwiched between the two plate-shaped members. In this state, it is attached to the slider end surface. Even with such a structure, the same operation as that of the invention according to claims 1 to 3 can be obtained.

In the invention according to claim 4, since the ends of the ring-shaped member inserted into the holes or notches of the sleeves project from the front surface or the back surface of the lubricant-containing member, the lubricant-containing member is included. At least both sleeves of the member are sandwiched between the slider end surface and the plate member, but friction between them is small. For this reason, the above-described operation of contacting both sleeve portions of the lubricant-containing member with the guide rail is smoothly performed, so that the lubricant-containing member can always be reliably brought into contact with the guide rail.

Materials for the lubricant-containing member of the present invention will be described in detail below. That is, as the lubricant-containing member,
For example, a material such as rubber or synthetic resin containing a lubricant can be used. In the case of a lubricant-containing member obtained by adding a lubricant to rubber, for example, polyurethane rubber cured in a grease-containing state can be applied.

Polyurethane rubber is a compound formed by the reaction of 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, polyamino compounds and the like. Short chain active hydrogen 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 produce a lubricant-containing member,
The lubricant-containing member is made of a synthetic resin selected from the group of polyolefin resins having basically the same chemical structure such as polyethylene, polypropylene, polybutylene, and polymethylpentene, and paraffin such as poly-α-olefin oil as a lubricant. Inject a raw material prepared by mixing any one of hydrocarbon oils, naphthenic hydrocarbon oils, mineral oils, ether oils such as dialkyldiphenyl ether oils, ester oils such as phthalates, etc., alone or in the form of a mixed oil. What is formed by molding can be applied, and various additives such as an antioxidant, a rust inhibitor, an antiwear agent, a defoaming agent, and an extreme pressure agent may be added to the lubricant in advance.

The composition ratio of the lubricant-containing member is 20 to 80% by weight of the polyolefin resin and 80 to 20% by weight of the lubricant based on 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 synthetic resins mentioned above 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 supply ability. .

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION 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 which shows the embodiment of. 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 arcuate cross section is formed at the ridge line 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 is composed of a slider body 2A and end caps 2B attached to both ends of the slider body 2A. The slider body 2A has rolling element rolling grooves 3A of the guide rail 1 on the inner side surfaces of the sleeve portions 4, respectively. 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 grease integrally formed 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. The sleeve 12A, 12B of the side seal 12 also has a through hole 12 through which a mounting screw penetrates.
a and 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 the front view of FIG. 3A and the side view of FIG. 3B of the lubricant containing member 11, both sleeve portions 11A and 11B of the lubricant containing member 11 are 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 concave portion 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.

Furthermore, the thickness V of the ring-shaped members 15A, 15B and 16 is smaller than the thickness W of the lubricant containing member 11.
It is slightly thicker (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 are provided with the mounting screws 17A and 17B which penetrate the through holes 2a and 2b of the end cap 2B and are screwed into the main body 2A. 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 this 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 manner, 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. This self-lubricating property enables stable and smooth operation for a long period of 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.

Since the ring-shaped member 16 having an outer diameter larger than the inner diameter is fitted into the through hole 11c, as shown in FIG. 8B, the lubricant-containing member 11 straddles the guide rail 1. In the detached state, the ring-shaped member 16 pushes the through hole 11c to the left and right to expand the sleeve 11A.
A biasing force that presses 11 and 11B against the guide rail 1 is generated. Therefore, even if there is a slight manufacturing error in the dimension of the lubricant-containing member 11 or the lubricant-containing member 11 is slightly worn, the lubricant-containing member 11 can be more reliably applied to the sealed surface of the guide rail 1. It is possible to make a close contact at all times. 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 thickness 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 filled with 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 has 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 self-contraction and the urging force. When it is deformed in the direction of being pressed against, the inner bottom surface 11h approaches a horizontal state, and the inner bottom surface 11h comes into stable contact with the upper surface 1a of the guide rail 1.

Further, the lubricant containing member 11 is 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, and the reinforcing plate 10 corresponds to another plate-shaped member.

9 and 10 are diagrams showing a second embodiment of the present invention. The same members and parts as those in the first embodiment are designated by the same reference numerals, and the duplicate description thereof 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, FIG. 10 is a front view of the lubricant containing member 11 straddling the guide rail 1.
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.

FIG. 11 is a diagram showing a third embodiment of the present invention, and FIGS. 11 (a) to 11 (d) show the lubricant-containing member 11
It is a perspective view which shows the modification of the ring-shaped member 16 fitted in the through-hole 11c. The structure other than the ring-shaped member 16 is the same as that of the first embodiment. That is, in the present embodiment, the slit 1 extending in the axial direction is formed on the outer peripheral surface of the ring-shaped member 16 formed of a deformable material such as metal or polymer material (plastic, rubber, etc.).
6a is formed. Then, similarly to each of the above-described embodiments, the inner diameter of the through hole 11c is made slightly smaller than the outer diameter of the ring-shaped member 16 so that the ring-shaped member 16 can be fitted into the through hole 11c in a reduced diameter state. 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, the action of expanding the through hole 11c can be stably obtained over a long period of time, so that the urging force that presses the sleeve portions 11A and 11B against the guide rail 1 is maintained for a long period of time, and the first embodiment described above is performed. It is possible to more reliably obtain the same effect as the form.

The diameter 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. The deformation characteristics of the ring-shaped member 16 determine 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, so that each of the above factors depends on 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. 11A to 11D, but are completely arbitrary.

FIG. 12 is a view showing a modification of the third embodiment, in which instead of the ring-shaped member 16, a solid cylindrical member 16A is fitted in the through hole 11c. In the columnar member 16A, a slit 16b is formed so that the diameter can be increased or decreased. Then, even if such a cylindrical member 16A is used, the same operation and effect as in the case where the ring-shaped member 16 as shown in FIG. 11 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. 12 (a) to 12 (c), but are completely arbitrary.

FIG. 13 is a view showing a fourth 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, a total of two through holes 11c are formed at positions of the connecting portion 11C of the lubricant containing member 11 from both sleeve portions 11A and 11B.
The ring-shaped member 16 having the slit 16a shown in the third embodiment is fitted in the 1c.

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. Note 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. 12 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 the above-mentioned respective embodiments, the thickness V of the ring-shaped members 15A, 15B, 16 is made larger than the thickness W of the lubricant containing member 11, but the thickness V is equal to the thickness W. Alternatively, it may be slightly smaller, or the thickness V of the ring-shaped members 15A and 15B may be larger than the thickness W of the lubricant-containing member 11. 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 thickness V and the thickness W that does not hinder the deformation.

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

[0057]

As described above, according to the present invention,
The lubricant that exudes gradually from the lubricant-containing member over time,
Since it can be supplied to the rolling elements via the guide rail, there is an effect that the smooth rolling of the rolling elements 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.

Moreover, since the lubricant-containing member can be constantly brought into contact with the guide rail, the lubricant exuding from the lubricant-containing member can be stably supplied to the rolling element through the guide rail. There is an effect that the smooth rolling of the rolling elements can be maintained more reliably.

[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 a third embodiment.

FIG. 12 is a perspective view showing a modified example of the third embodiment.

FIG. 13 is a front view showing the configuration of the fourth embodiment.

[Explanation of symbols]

1 Guide rail 1a upper surface 1b side 2 slider 2A body 2B end cap 3A, 3B Rolling element rolling groove 10 Reinforcement plate (plate member) 11 Lubricant-containing member 11A, 11B Sleeve 11C connection part 11a to 11c through holes 12 Side seal (plate member) 13 Lip 15A, 15B ring-shaped member 16 Ring-shaped member 16A cylindrical member 17A, 17B mounting screw 20A, 20B Notch

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10M 143/02 C10M 143/02 143/04 143/04 143/06 143/06 143/08 143/08 149 / 18 149/18 169/02 169/02 F16C 19/50 F16C 19/50 33/66 33/66 A // C10N 10:02 C10N 10:02 F term (reference) 3J101 AA02 AA44 AA52 AA64 AA71 AA85 BA73 CA14 EA32 EA34 EA35 EA36 EA38 EA39 EA49 EA54 EA63 EA76 FA32 3J104 AA03 AA23 AA36 AA65 AA69 AA74 BA21 BA62 CA14 CA16 CA18 CA23 CA34 CA35 DA05 DA06 4H104 BA07A BB17B BB19B CA02C CA03C CA04C CA05C CE13C DA02A FA01 QA18 QA21 QA22 QA23

Claims (4)

[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 motion guide bearing device in which a number of rolling elements for relatively moving the slider along the guide rail are loaded in the rolling element circulation path, the linear guide bearing device is made of a lubricant-containing rubber or synthetic resin and extends substantially over the guide rail. A U-shaped lubricant-containing member is attached to the end of the slider in a state where the lubricant-containing member is sandwiched between the end surface of the slider and the plate-like member and at least a part of the lubricant-containing member is in contact with the guide rail. A hole or a notch for fixing the lubricant-containing member to the slider is formed in both U-shaped sleeves of the lubricant-containing member, and a ring-shaped member is inserted into the hole or the notch. Characteristic linear motion guide bearing device. 2. The linear guide according to claim 1, wherein a through hole that penetrates the connecting portion and is open to a side opposite to the guide rail is formed in a connecting portion that connects the sleeve portions. Bearing device. 3. 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. 4. The thickness of the ring-shaped member inserted into the holes or notches formed in the sleeves is greater than the thickness of the lubricant-containing member. The linear motion guide bearing device according to any one of 1.