JPH1151047A - Linear guide bearing device - Google Patents

Abstract

(57) [Problem] To provide a linear motion guide bearing device which increases the supply amount of a lubricant and prevents foreign matter from entering. A deformable protrusion 11 in which a lubricant containing member 111, 112 protrudes in a direction in which a guide rail 1 extends.
1 a, 111 b, 112 a, 112 b, the protrusions being brought into contact with the reinforcing member 10, the side seals 12, and the lubricant-containing members, whereby the lubricant seeping out from the surface of the lubricant-containing members is provided. Is formed between these adjacent members so as to allow the lubricant to travel downward, so that the lubricant can be supplied to the rolling element rolling grooves 3B and the like, whereby The lubrication of the moving body can be further improved. In addition, the protrusions 111a, 111b, 112a, and 112b abut on adjacent members, thereby functioning as a seal for preventing foreign substances from entering from outside, thereby preventing wear of the rolling elements.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motion guide bearing device, and more particularly to a linear motion guide bearing device having improved lubricity.

[0002]

2. Description of the Related Art A linear guide bearing device for supporting a linearly moving object with low friction is known. 1 to 8 are views showing a linear guide bearing device according to the prior art. First, the structure will be described. As shown in FIG. 1 which is a perspective view of such a linear motion guide bearing device, the rolling element rolling grooves 3A,
It has a guide rail 1 having 3B and extending in the axial direction, and a slider 2 assembled across the guide rail 1.

Specifically, one of the rolling element rolling grooves 3B formed of axially concave grooves having a substantially quarter-arc cross section is formed at a 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 3A having a substantially semicircular cross section is formed at an intermediate position between both side surfaces 1b of the guide rail. At the bottom of the rolling element rolling groove 3A, an escape groove 3a of a retainer for preventing the rolling element from falling off when the slider 2 is not assembled to the guide rail 1 is formed.

On the other hand, the slider 2 comprises a slider body 2A and end caps 2B attached to both ends thereof. The slider body 2A is provided on the inner side surfaces of both sleeves 4 with rolling element rolling grooves 3A of the guide rail 1. 3B, a rolling element rolling groove (not shown) facing the rolling element and a rolling element return path axially penetrating the thick portion of the sleeve. On the other hand, the end cap 2B has a curved path (not shown) for connecting the rolling element rolling groove of the slider body 2A and a rolling element return path parallel thereto, and the rolling element rolling groove and the rolling element return path are provided. The rolling element circulation path is formed by the path and the curved paths at both ends. A number of rolling elements made of, for example, steel balls are loaded in the rolling element circulation circuit. In the figure, reference numeral 7 denotes grease nipple.

[0005] The end cap 2B is an injection-molded product 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 an assembled state of the end portion of the slider 2, a reinforcing plate 10 as a plate-like member is provided on each outer surface side of both end caps 2 B from the side near the end cap 2 B. The lubricant containing member 11 and the side seal 12 as a side seal member are fixed in an overlapping state.

[0006] Of these, the reinforcing plate 10 is a substantially U-shaped steel plate adapted to the outer shape of the end cap 2B.
The two sleeves 10A and 10B have through holes 10a and 10b for penetrating the mounting screw, and the connecting part 10C connecting the two sleeves 10A and 10B has a through hole 10c for grease nipple. Is formed. The reinforcing plate 10 is not in contact with the guide rail 1.

The side seal 12 is made of a substantially U-shaped steel plate conforming to the outer shape of the end cap 2B, urethane rubber having a shape similar to this steel plate and integrally molded on the outer surface thereof, NBR (NBR). (Acrylonitrile rubber) or grease-containing polyurethane rubber. The inner surface of the lip portion 13 of the side seal 12 which contacts the guide rail 1 is guided according to the sectional shape of the guide rail 1 so that the gap between the slider 2 and the guide rail 1 can be sealed. Upper surface 1a of rail 1
Further, it is formed into a shape that can slide on the outer surface 1b, more specifically, a shape that can slide on the rolling element rolling grooves 3A and 3B and the relief groove 3a. It should be noted that both sleeve portions 12A and 12B of the side seal 12 are also provided with through holes 12 for attaching screws.
a, 12b are formed, and both sleeve portions 12a
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 corresponding to the outer shape of the end cap 2B. The surface of the guide rail 1 has a flat shape, not 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.
a and the outer surface 1b including the rolling element rolling grooves 3A and 3B.

As shown in FIG. 3 (a) which is a front view of the lubricant containing member 11 and FIG. 3 (b) which is a side view thereof, the two 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 the grease nipple is formed in the connecting portion 11C connecting the both 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 has the upper surface 1a of the guide rail 1 and the rolling element rolling grooves 3A, 3A.
B is formed in such a size as to be in sliding contact with the outer surface 1b including the groove B, and a portion of the inner surface of the concave portion facing the rolling element rolling grooves 3A, 3B and the relief groove 3a of the guide rail 1 has respective grooves 3B, 3B, 3A and 3a so as to be in sliding contact with the inner surfaces thereof.
1f, 11g, 11d and 11e are formed. Further, of the inner surfaces of the recesses of the lubricant containing member 11, the inner bottom surface 11 h slidingly contacting the upper surface 1 a of the guide rail 1 is attached to the sleeve portions 11 A and 11 B in a state in which no external force is applied to the lubricant containing member 11. It has an arc shape with a radius of curvature R such that the center side protrudes downward from the near end side.

The two 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. These ring-shaped members 15A, 15B
FIG. 4A which is a front view thereof, and FIG. 4 which 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.

The connecting portion 11C of the lubricant containing member 11
The ring-shaped (or solid cylindrical) member 16 is also fitted into the through hole 11c formed in the above. This ring-shaped member 16 is also a short cylindrical member as shown in FIG. 5A which is a front view thereof, and FIG. 5B 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.

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
When fitted into a to 11c, 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, as shown in FIG.

FIGS. 9 and 10 are views similar to FIG. 6, showing the dimensional relationship with the ring-shaped members 15A, 15B and 16 when two or three lubricant containing members 11 are combined. That is, when the ring-shaped members 15A, 15B and 16 are fitted into the through holes 11a to 11c, FIGS.
As shown in the figure, the ring-shaped members 15A, 15B and 1
The end portion 6 projects from the front surface or the back surface of the stacked lubricant-containing member 11.

The reinforcing plate 10, the lubricant-containing member 11, and the side seal 12 are provided in the through holes 2a, 2a of the end cap 2B.
b, and the mounting screws 17A, 1 which are screwed into the main body 2A
7B are through holes 12a and 12b of the side seal 12, the ring-shaped members 15A and 15B inside the through holes 11a and 11b of the lubricant containing member 11, and the through holes 10a and 15b of the reinforcing plate 10.
By penetrating 10b, it is fixed to the main body 2A integrally with the end cap 2B.

Next, the operation of the linear motion guide bearing device will be described. That is, the slider 2 is moved on the guide rail 1 fixed to the machine base.
When the roller moves, the rolling element in the slider 2 moves at a lower speed than the slider 2 in the moving direction of the slider 2 while rolling in the rolling element rolling path, and makes a U-turn on the curved path on one end side. It moves while rolling in the reverse direction on the moving body return path, and repeats a cycle of making a reverse U-turn on the curved path on the other end side and returning to the inside of the rolling element rolling path.

When the linear guide bearing device is driven in this manner, the lubricant-containing member 11 also moves while being in contact with the guide rail 1, and the influence of frictional heat during the movement is added. The lubricant gradually exudes with time, and 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. Automatically supplied to rolling elements. Due to this self-lubricating property, stable and smooth operation is performed for a long time. Therefore, in particular, lubricant is supplied from outside to the slider 2.
, And good operation can be continued for a long time at a low torque without supplying it to the motor.

Further, since the inner shape of the concave portion 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 seeps out of the lubricant-containing member 11, the lubricant-containing member 11 itself contracts itself. Due to the contraction force, the sealing surface of the guide rail 1 is always in close contact with the surface to be sealed, and the sealing function and the lubricating function are achieved.

Since the side seal 12 is used as the plate-shaped member on the outer surface of the lubricant containing member 11, the sealing performance is further improved. In particular, the connecting portion 11C of the lubricant containing member 11
Since the upper surface side of the through hole 11c formed in the sleeve 11 is cut open, the sleeve portions 11A and 11B can be easily spread right and left as shown in FIG. The work of attaching the containing member 11 across the guide rail 1 can also be easily performed.

Since the ring-shaped member 16 whose outer diameter is larger than the inner diameter is fitted into the through hole 11c as urging means, the lubricant-containing member 11 is guided as shown in FIG. 8 (b). In a state where the rail 1 is straddled, the ring-shaped member 16 pushes the through hole 11c right and left, thereby generating an urging force for pressing the sleeves 11A and 11B against the guide rail 1. For this reason, even if there is a slight manufacturing error in the dimensions of the lubricant containing member 11,
Even if the member 1 is worn to some extent, the lubricant-containing member 11 can be surely brought into close contact with the surface to be sealed of the guide rail 1 more reliably. In this case, in the structure in which the upper surface side of the through hole 11c is cut open, the force of the ring-shaped member 16 to push and spread is converted into an urging force for pressing the sleeve portions 11A and 11B against the guide rail 1. It is very advantageous for the operation.

Further, 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, and the ends of the ring-shaped members 15A, 15B and 16 are made Since the mounting means of the lubricant containing member 11 is configured to protrude from the front surface or the back surface of the lubricant 11, the lubricant containing member 11 is The friction between is reduced. For this reason, the deformation of the lubricant containing member 11 in the direction perpendicular to the axial direction of the guide rail 1 due to the self-shrinkage or the urging force described above is performed smoothly, so that the lubricant containing member 11 is always surely attached to the guide rail 1. Can be in close contact.

Further, since the inner bottom surface 11h of the concave portion of the lubricant containing member 11 is formed in the above-mentioned arc shape, the sleeve portions 11A and 11B of the lubricant containing member 11 are moved by the self-shrinkage and the urging force. When it is deformed in the direction 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 provided on the reinforcing plate 10.
In addition, since it is a member interposed between the side seals 12, it is easy to have a size that can contain a sufficient amount of lubricant to maintain the rolling of the rolling element for a long period of time. In addition, since the lubricant-containing member 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 which is a consumable, and to simplify the installation. There is an advantage that is.

Then, the lubricant-containing member 11 is connected to the reinforcing plate 1.
0 and the side seal 12, the portion of the side seal 12 that comes into contact with the guide rail 1, that is, the lip portion 13 is unlikely to roll up even when the slider 2 reciprocates. Leakage of internal grease to the outside is also reduced. Further, since the lubricant that has oozed out of the lubricant containing member 11 is also supplied to the lip portion 13 that comes into contact with the guide rail 1 of the side seal 12, it also helps to reduce the wear of the lip portion 13, Further, in the case where the lip portion 13 is formed from polyurethane rubber which is cured in a state containing grease, the lubricant is supplied from itself, and the 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 time, foreign matter is prevented from entering the main body 2A side, and the life of the linear motion guide bearing device itself is prolonged. There is an advantage that it can be achieved.

With the structure according to the present technology, 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. May be opened at an appropriate time to supply lubricant such as grease into the slider.

[0026]

However, the linear guide bearing device according to the prior art has the following problems. In a linear motion guide bearing device used for a machine tool or an industrial machine, since a load applied to a rolling element is generally large, it is necessary to supply a large amount of lubricant to lubricate the rolling element.

Here, in order to increase the amount of the lubricant for lubricating the rolling elements and the supply amount of the lubricant per unit time, the thickness of the lubricant containing member 11 or the number of the lubricant containing members must be increased. Can be considered. However, simply increasing the thickness or the like of the lubricant containing member 11 may not be used for lubrication of the rolling elements, that is, the amount of useless lubricant may increase.

More specifically, the lubricant exudes from the outer surface of the lubricant-containing member except at the sliding contact portion with the rolling element rolling groove, but reaches the rolling element rolling groove. Since the lubricant is limited to those that run down the front of the lubricant-containing member located above the rolling element rolling groove, the area of the front does not increase only by increasing the thickness or the number of the lubricant-containing member. The amount of lubricant that runs down the front is unchanged. Rather, a problem arises in that the lubricant that has oozed from the side surface having an increased surface area is dropped unnecessarily without being supplied to the rolling element rolling grooves.

In addition, when the linear guide bearing device is mounted on a machine tool or the like, the guide rail may be located above the lubricant-containing member. In such a case, according to the prior art,
The amount of lubricant that runs down from the surface of the lubricant-containing member and reaches the rolling element rolling groove is extremely limited.

Further, when foreign matter such as dust is allowed to pass between the lubricant-containing member and the guide seal or the reinforcing member, the foreign matter adheres to the rolling element rolling groove, and the wear of the rolling element and the like is caused. Therefore, it is necessary to effectively prevent foreign matter from entering.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a linear guide bearing device which increases the supply amount of a lubricant and prevents foreign substances from entering. Aim.

[0032]

In order to achieve the above-mentioned object, a linear guide bearing device according to the present invention is provided with a slider in which a slider is loosely fitted to an axially extending guide rail having a rolling element rolling groove on an outer surface. A rolling element comprising 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 circulation path is provided, and the rolling element circulation path is loaded with a number of rolling elements for relatively moving the slider along the guide rail, and includes one or more lubricant-containing members made of rubber or resin containing lubricant. In a linear motion guide bearing device disposed adjacent to at least one of a plate member and a side seal member disposed at an end of the slider, at least a portion of the lubricant-containing member contacts the guide rail. Mounted in condition The lubricant-containing member has a deformable protrusion projecting in a direction in which the guide rail extends, and the protrusion includes the plate-shaped member, the side seal member, and another lubricant-containing member. By contacting at least one of the above, between the member with which the protrusion comes into contact and the lubricant-containing member having the protrusion, the lubricant that has permeated from the surface of the lubricant-containing member falls downward. It is characterized in that a gap that allows the vehicle to descend is formed.

[0033]

According to the linear guide bearing device of the present invention, the lubricant-containing member has a deformable protrusion projecting in the direction in which the guide rail extends, and the lubricating member has the plate-like shape. By contacting at least one of the member, the side seal member, and another lubricant-containing member, the lubricant is provided between the member that the protrusion contacts and the lubricant-containing member having the protrusion. Since a gap is formed that allows the lubricant that has oozed from the surface of the containing member to travel down, it is possible to supply the lubricant to the rolling element rolling groove, thereby Lubrication of the rolling elements can be further improved. In addition, when the projection comes into contact with the member, the projection functions as a seal for preventing foreign matter from entering from outside, thereby preventing wear of the rolling elements. The protrusion is deformed when it comes into contact with the member, but the amount of contact is adjusted so that the lubricant-containing member itself hardly deforms.

Further, according to the linear motion guide bearing device of the present invention, on the surface of the lubricant-containing member on which the protrusion is provided, the lubricant that seeps out of the lubricant-containing member is coated with the rolling element rolling element. Since the guide path for guiding the moving groove is further formed, regardless of the mounting posture of the linear motion guide bearing device,
The lubricant that has oozed out of the surface of the lubricant-containing member can be effectively supplied to the rolling element rolling groove, whereby the lubrication of the rolling element can be further improved.

First, in the case of a lubricant-containing member obtained by adding a lubricant to a rubber, for example, a polyurethane rubber cured in a state containing grease can be used. Polyurethane rubber is a compound formed by the reaction between a polyisocyanate and an active hydrogenated product. As the polyisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, or the like can be used.

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

Next, when a lubricant is added to a synthetic resin to produce a lubricant-containing member, the lubricant-containing member has basically the same chemical structure as polyethylene, polypropylene, polybutylene, polymethylpentene and the like. Synthetic resins selected from the group of polyolefin resins, paraffinic hydrocarbon oils such as poly-α-olefin oils, naphthenic hydrocarbon oils, mineral oils, ether oils such as dialkyldiphenyl ether oils, phthalate esters as lubricants A mixture prepared by injection molding a raw material prepared by mixing any one of ester oils or the like alone or in the form of a mixed oil can be applied, and an antioxidant, a rust inhibitor, an antiwear agent is preliminarily included in a lubricant. And various additives such as an antifoaming agent and an extreme pressure agent.

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 resins
When the amount is less than the weight%, hardness and strength not higher than a certain level cannot be obtained. Also, when the polyolefin resin exceeds 80% by weight (that is, when the lubricant is less than 20% by weight)
In this case, the supply of the lubricant is reduced, and the effect of reducing the wear of the lip portion of the sealing device is reduced.

The synthetic resin groups have the same basic structure but different average molecular weights, and range from 1 × 10 ^{3 to} 5 × 10 ⁶ . Among them, the average molecular weight is 1 × 10 ^3-
And a relatively low molecular weight of 1 × 10 ^6, and an average molecular weight 1 × 10 ⁶ ~5 × 10 ⁶ of ultra-high molecular weight, using a mixture according to singly or 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-mentioned polyolefin resin.

As the thermoplastic resin, various resins such as polyamide, polycarbonate, polybutylene terephthalate, polyphenylene sulfide, polyether sulfone, polyester ether ketone, polyamide imide, polystyrene, ABS resin and the like can be used.

On the other hand, as the thermosetting resin, resins such as unsaturated polyester resin, urea resin, melamine resin, phenol resin, polyimide resin and epoxy resin can be used. These resins may be used alone or as a mixture.

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

Further, in order to prevent deterioration of the polyolefin resin due to heat, N, N'-diphenyl-P-phenyldiamine, 2,2'-methylenebis (4-ethyl-
Antioxidants such as 6-t-butylphenol), and 2-hydroxy-4-n-
Octoxybenzophenone, 2- (2'-hydroxy-
An ultraviolet absorber such as 3′-t-butyl-5′-methyl-phenyl) -5-chlorobenzotriazole may be added.

The additive amount of all of the above additives (other than the polyolefin resin and the lubricant) is 20% by weight or less of the total amount of the molding raw material as a whole of the additives, so that the lubricant supply capacity is maintained. Preferred above.

[0045]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 11 is a side view showing the lubricant-containing member used for the linear motion guide bearing device according to the first embodiment, together with a side seal and a reinforcing member. The lubricant-containing member according to the embodiment of the present invention can be applied to the linear guide bearing device according to the prior art shown in FIGS. 1 to 10 as it is. This will be mainly described.

In the first embodiment shown in FIG. 11, two lubricant containing members 111, 1 having the same shape are used.
12 is sandwiched between the side seal 12 and the reinforcing member 10. Each of the lubricant containing members 111 and 112 has a protrusion 111a, 112a having a triangular cross section above the surface 111c, 112c on the reinforcing member 10 side.
Above the second side surfaces 111d and 112d, the protrusion 1
At positions higher than 11a and 112a, there are protrusions 111b and 112b having a triangular cross section. Each projection extends in the width direction, but the ring-shaped member 16 is avoided.

When the lubricant-containing members 111 and 112 are attached to the main body 2A using the attachment screws 17A and 17B (FIG. 2), the lengths of the ring-shaped members 15A and 15B (not shown in FIG. 11) and 16 are changed. As shown in FIG. 11, since the total length of the lubricant-containing members 111 and 112 is longer than the total length, the protrusions of the lubricant-containing members 111 and 112 do not completely collapse when they come into contact with the opposing surfaces. It is maintained in a slightly deformed state.

More specifically, the protruding portion 111a abuts on the inner surface 10a of the reinforcing member, thereby forming a gap A1 between the surface 111c of the lubricant containing member and the inner surface 10a. The protrusions 111b and 112a are provided on the surfaces 112c of the lubricant-containing members 1112 and 111 facing each other.
111d, which abuts on the surface 112d,
A gap A2 is formed between c and the surface 111d. In addition, the protrusion 112b abuts against the inner surface 12a of the side seal, whereby the surface 112d of the lubricant-containing member and the inner surface
A gap A3 is formed between the gap A3 and the gap A3.

Since the gaps A1, A2, A3 are formed as described above, the surface 11 of the lubricant-containing members 111, 112
The lubricant that has permeated from 1c, 111d, 112c, and 112d is transmitted downward along gravity along the surface according to gravity, and reaches the rolling element rolling grooves 3A and 3B (FIG. 1). Can be effectively lubricated.

The projections 111a, 111b, 112
Since a and 112b cover the gaps A1, A2 and A3 over the width direction of the lubricant-containing members 111 and 112, foreign matters fall from above into the gaps and the rolling element rolling grooves 3A, 3B can be prevented from adhering. Such an effect is stronger between the lubricant-containing members 111 and 112 that are double-shielded by the protrusions 111b and 112a.

FIG. 12 is a side view showing a lubricant-containing member used in the linear guide bearing device according to the second embodiment together with a side seal and a reinforcing member. Note that the second embodiment will be described focusing on differences from the first embodiment, and description of common parts will be omitted.

The difference between the second embodiment shown in FIG. 12 and the first embodiment is that the lubricant containing members 211 and 21 are different from the first embodiment.
2 are the shapes of the projections 211a, 211b, 212a, 212b. That is, the projection has a rectangular cross section, and particularly the projections 211b and 212a are in contact with each other, so that the lubricant containing member 211 and the reinforcing plate 1
0 or the gap B2 between the lubricant-containing member 212 and the side seal 12 with respect to the lubricant-containing member 2
The gap B2 between the first and second parts 212 is almost doubled.

In the second embodiment, other configurations and effects are the same as those of the first embodiment, and therefore, description thereof will be omitted.

FIG. 13 is a side view showing a lubricant containing member used for a linear motion guide bearing device according to the third embodiment, together with a side seal and a reinforcing member. Note that the third embodiment will be described focusing on differences from the first embodiment, and description of common parts will be omitted.

The third embodiment shown in FIG. 13 has a projection having the same shape as that of the first embodiment, but the projection is formed only on one side. That is, a gap C1 is formed between the lubricant containing members 311 and 312 by the projection 311a, and a gap C2 is formed between the lubricant containing member 312 and the side seal 12 by the projection 312a. No gap is formed between the agent-containing member 311 and the reinforcing member 10.

Even when only the gaps C1 and C2 are formed as described above, the lubricant that has permeated from the lubricant containing members 311 and 312 is transmitted downward along the surface according to the gravity and falls down. It reaches the rolling grooves 3A and 3B (FIG. 1),
Thereby, the rolling elements (not shown) can be effectively lubricated.

Further, the protrusions 311a and 312a extend over the gap C over the width direction of the lubricant containing members 311 and 312.
Since the upper part of C1 and C2 is shielded, foreign substances can be prevented from falling into the gap from above and adhering to the rolling element rolling grooves 3A and 3B. The protrusions 311a, 312a
Of the lubricant containing member 311 and the reinforcing member 10
Is always pressed against the other party, and there is no gap between the two, so that no foreign matter enters through the gap.

FIG. 14 is a side view showing a lubricant containing member used in a linear motion guide bearing device according to a fourth embodiment together with a side seal and a reinforcing member. The fourth embodiment will be described focusing on the differences from the second embodiment shown in FIG. 12, and the description of the common parts will be omitted.

The fourth embodiment shown in FIG. 14 also has a projection having the same shape as that of the second embodiment, but the projection is formed only on one side. That is, a gap D1 is formed between the lubricant containing members 411 and 412 by the protrusion 411a, and a gap D2 is formed between the lubricant containing member 412 and the side seal 12 by the protrusion 412a. No gap is formed between the agent-containing member 411 and the reinforcing member 10.

Even in the case where only the gaps D1 and D2 are formed, the lubricant seeping out of the lubricant-containing members 411 and 412 is transmitted downward along the surface according to the gravity and falls down. It reaches the rolling grooves 3A and 3B (FIG. 1),
Thereby, the rolling elements (not shown) can be effectively lubricated.

The protrusions 411a and 412a extend over the width D of the lubricant containing members 411 and 412, and
Since the upper part of D1 and D2 is shielded, foreign substances can be prevented from falling into the gap from above and adhering to the rolling element rolling grooves 3A and 3B. The protrusions 411a and 412a
Of the lubricant containing member 411 and the reinforcing member 10
Is always pressed against the other party, and there is no gap between the two, so that no foreign matter enters through the gap.

FIGS. 15 to 18 are side views showing the protrusions of the lubricant-containing member used in the linear guide bearing devices according to the fifth to eighth embodiments. In this embodiment, differences from the above-described embodiment will be mainly described, and description of common parts will be omitted.

In the fifth embodiment shown in FIG. 15, the lubricating members 511 and 512 have semi-circular projections 511b and 512a in contact with each other.

In the sixth embodiment shown in FIG. 16, the lubricant-containing members 611 and 612 are brought into contact with the protrusions 611b and 612a having a triangular cross section by being shifted up and down, as shown in FIG. In the seventh embodiment, in the lubricant-containing members 711 and 712, the tips of the protrusions 711b and 712a having a triangular cross section are brought into contact with each other.

In the eighth embodiment shown in FIG. 18, the lubricant-containing member 811 has a projection 8 having a triangular cross section.
11b, but the lubricant-containing member 812
It has a projection 812a having a groove corresponding to 11b, and the projections are engaged with each other.

In the fifth to eighth embodiments, the other configurations and effects are the same as those of the first embodiment, and the description thereof will be omitted.

FIGS. 19 to 21 are side views showing a lubricant containing member used in the linear motion guide bearing device according to the ninth to eleventh embodiments together with a side seal and a reinforcing member.
The ninth to eleventh embodiments will be described focusing on the differences from the above-described embodiments, and the description of common parts will be omitted.

In the ninth embodiment shown in FIG. 19, the thicker lubricant containing member 911 is
A protrusion 911 a having a semicircular cross section is held between the side seal 12 and the reinforcing member 10.

In the tenth embodiment shown in FIG. 20, a thick lubricant-containing member 1011 has a projection 1011 a having a right-angled isosceles triangular cross section in contact with the side seal 12.

In the eleventh embodiment shown in FIG. 21, the thicker lubricant-containing member 1111 has the projections 1111a and 1111b having a triangular cross section in contact with the side seals 12, so that the foreign substance shielding effect and the like can be obtained. Has been improved.

In the ninth to eleventh embodiments, the other configurations and effects are the same as those of the first embodiment, and therefore, description thereof will be omitted.

FIGS. 22 to 25 are front views showing a lubricant containing member used in the linear motion guide bearing device according to the twelfth to fifteenth embodiments together with a guide rail. The 22nd
In the twenty-fifth to twenty-fifth embodiments, differences from the above-described embodiments will be mainly described, and description of common parts will be omitted.

In the above-described embodiment, the lubricant-containing member has a projection formed only above it. On the other hand, in the twelfth embodiment shown in FIG.
The protrusion 1211a is formed along the outer peripheral edge of the lubricant containing member 1211 (avoiding the through holes 11a, 11b, 11c of the ring-shaped members 15A, 15B, and 16). Both ends of the protrusion 1211a terminate on the outer surface of the guide rail 1.

The projection 1211a contacts a reinforcing member (not shown), a guide seal, or another lubricant-containing member to form a closed space E1.

Since the space E1 is formed as described above, the lubricant that has permeated from the surface of the lubricant containing member 1211 is transmitted downward according to gravity along the surface and descends.
The rolling elements reach the rolling grooves 3A and 3B, whereby the rolling elements (not shown) can be effectively lubricated. The space E1
Is sealed, so there is little risk of lubricant leaking out.

Further, since the space E1 is sealed, it is possible to completely prevent foreign matter from entering from outside. In addition,
The cross-sectional shape of the protrusion 1211a may be any of the shapes described above.

In the thirteenth embodiment shown in FIG. 23, similar to the twelfth embodiment, the lubricant-containing member 13
In addition to the protrusion 1311 a being formed along the outer peripheral edge of the lubrication member 11, from the vicinity of both upper corners of the lubricant-containing member 1311,
A second projection 1311b is formed toward the rolling element rolling groove 3B of the guide rail 1.

In addition to the same operation and effect as the twelfth embodiment, a unique effect of the thirteenth embodiment is that the lubricant that has leaked out from the surface of the lubricant containing member 1311 is used as a guide passage. 2 and moves downward along the second protrusion 1311b, thereby reaching the rolling element rolling groove 3B, whereby the rolling element (not shown) can be more effectively lubricated.

In the fourteenth embodiment shown in FIG. 24, the guide rail 1 is arranged (inverted state) so as to be above the lubricant-containing member 1411, but is similar to the twelfth embodiment. In addition to the protrusions 1411a formed along the outer peripheral edge of the lubricant-containing member 1411, from the vicinity of both upper corners of the lubricant-containing member 1411 toward the rolling element rolling groove 3C of the guide rail 1. , The second protrusion 1411b
Are formed, and a third projection 1411c is formed substantially parallel to the rolling element rolling groove 3B.

The same operation and effect as those of the twelfth embodiment can be obtained. Even if the guide rail 1 is arranged above the lubricant-containing member 1411 (inverted state), the fourteenth embodiment
As an inherent effect of the embodiment, the lubricant-containing member 14
The lubricant that has permeated from the surface of the surface 11 moves downward along the second and third protrusions 1411b and 1411c as guide paths, whereby not only the action of the rolling element rolling groove 3C but also the action of gravity alone is achieved. Rolling element rolling groove 3B with insufficient lubricant
And it is possible to more effectively lubricate rolling elements (not shown). Note that the second protrusion 1411b is
The third protrusion 1411c is longer than the third protrusion 1411c, so that a large amount of lubricant can be collected and supplied to the rolling element rolling groove 3C which receives a larger load, and the rolling element can be lubricated.

In the fifteenth embodiment shown in FIG. 25, the guide rail 1 is arranged so as to be on the side of the lubricant containing member 1511 (in the upright state). Similarly to the above, the protrusion 1511a is formed along the outer peripheral edge of the lubricant containing member 1511, and the upper rolling element rolling groove 3B 'of the guide rail 1 is also provided from near the upper left corner of the lubricant containing member 1511. Toward the second protrusion 15
11b, and a third protrusion 1511c is formed substantially parallel to the lower rolling element rolling groove 3B.

The same operation and effect as those of the twelfth embodiment can be obtained. Even if the guide rail 1 is arranged so as to be on the side of the lubricant containing member 1411 (horizontal state), the fifteenth embodiment can be realized.
As an inherent effect of the embodiment, the lubricant-containing member 15
The lubricant that has permeated from the surface of 11 moves downward along the second and third projections 1511b and 1511c as guide paths, whereby not only the upper rolling element rolling groove 3B 'but also the action of gravity is exerted. It is possible to lubricate the rolling elements (not shown) more effectively by reaching the lower rolling element rolling grooves 3B where the lubricant cannot be reached by itself. The second protrusion 1
511b is longer than the third protrusion 1511c, so that more lubricant can be collected and supplied to the rolling element rolling groove 3B 'which receives a larger load, and overflowing lubricant is adjacent to the rolling element rolling groove 3B'. The rolling elements reach the rolling grooves 3A ', and the rolling elements can be lubricated.

As shown in FIG. 26, the linear guide bearing device is often used by attaching two guide rails 1 as a pair to a machine tool or the like. In that case, the two guide rails 1, 1 are exactly parallel and fixed on the bed B by bolts (not shown). Each of the guide rails 1 may be used with one slider 2 attached or two or more sliders depending on the type of the machine to which the linear motion bearing device is attached.
6 shows a case where two sliders 2, 2 are attached to each guide rail. A table T is bolted to each slider 2.

Here, considering that such a lubricant-containing member is attached to both ends of the slider 2, the stroke of the table T becomes shorter by the thickness of the lubricant-containing member attached to the outside of each slider 2. I will. Therefore, in the embodiment described below, a supply device including a lubricant-containing member is provided in a portion between the sliders 2 (interval L).

FIG. 27 shows a supply device 30 B between the sliders 2.
FIG. 28 is a view similar to FIG. 26, showing a state in which the two sliders 2 are attached to one guide rail 1;
FIG. 29 is a perspective view showing a state in which the supply device 30B with the joining member removed is attached, and FIG. 29 is a perspective view showing the supply device 30B in an exploded state.

The supply device 30B is provided with a number (four in FIGS. 28 and 29) of lubricant-containing members 33A, 33B, 3
3C and 33D are connected to the ring-shaped members 15A and 15B (FIG. 2).
8) and 16 are interposed between the reinforcing members 10 and fastened with the bolts 43, and then covered with the joining members 34.

The joining member 34 is used for attaching the lubricant-containing member to the table T so as to move in conjunction with the slider 2. More specifically, the joining member 34 is a plate member made of steel or synthetic resin, and restrains the lubricant-containing members 33A, 33B, 33C, 33D in the moving direction,
In addition, both side surfaces 34a and 34b are bent so as to have a U-shape for positioning in the direction perpendicular to the movement, and are fixed to the table T with bolts (not shown).

In the operation of the present embodiment, each of the sliders 2
Is moved along with the movement of the table T of the machine base, the rolling elements of the slider 2 move at a lower speed than the slider 2 in the moving direction of the slider 2 while rolling in the rolling element rolling path, and are not shown. The U-turn on the curved path on one end side moves while rolling in the reverse direction on the rolling element return path, and the circulation returning on the curved path on the other end side to return to the rolling element rolling path is repeated.

When the linear guide bearing device is driven in this way, the supply devices 3 mounted on the intermediate guide rails 1 between the two sliders 2 of each guide rail 1 are respectively provided.
OB moves on the guide rail 1 in conjunction with the slider 2. In such a case, the lubricant oozes out from the lubricant-containing members 33A, 33B, 33C, 33D that are in sliding contact with the guide rail 1, and is supplied to the rolling element rolling grooves.

Further, the lubricant containing members 33A, 33B, 3
The configurations of 3C and 33D are the same as those of the above-described embodiment (for example, the embodiment of FIG. 22), and include ring-shaped members 15A and 15D.
Since the configurations of B and 16 are also the same, a predetermined gap can be provided by a projection with respect to an adjacent member (a reinforcing member or another lubricant-containing member) in a state where the lubricant-containing member is attached. Thereby, similarly to the above-described embodiment, it is possible to improve lubricity and prevent intrusion of foreign matter.

In the above-described embodiment, the lubrication-containing member and the reinforcing member, the guide seal or another lubrication-containing member are connected to each other by the protrusions provided on the lubrication-containing member from the viewpoint of ease of manufacture. Although a gap is provided between them, such a gap may be formed by interposing another spacer between them.

[0092]

According to the linear guide bearing device of the present invention, the lubricant-containing member has a deformable projection projecting in the direction in which the guide rail extends, and the projection is formed of a plate-like member. ,
By contacting at least one of a side seal member and another lubricant-containing member, between the member that the protrusion contacts and the lubricant-containing member having the protrusion, the lubricant-containing member Since a gap is formed that allows the lubricant that has oozed from the surface to travel down, it is possible to supply the lubricant to the rolling element rolling groove, thereby enabling the rolling element Lubrication can be further improved. In addition, when the projection comes into contact with the member, the projection functions as a seal for preventing foreign matter from entering from outside, thereby preventing wear of the rolling elements. The protrusion is deformed when it comes into contact with the member, but the amount of contact is adjusted so that the lubricant-containing member itself hardly deforms.

Further, according to the linear motion guide bearing device of the present invention, the lubricant oozing out of the lubricant-containing member is coated on the surface of the lubricant-containing member provided with the protrusions with the rolling element rolling element. Since the guide path for guiding the moving groove is further formed, regardless of the mounting posture of the linear motion guide bearing device,
The lubricant that has oozed out of the surface of the lubricant-containing member can be effectively supplied to the rolling element rolling groove, whereby the lubrication of the rolling element can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional linear guide bearing device.

FIG. 2 is a perspective view showing an attached state of each part of a linear motion guide bearing device according to a conventional technique.

3A and 3B are diagrams showing a configuration of a lubricant-containing member according to a conventional technique, wherein FIG. 3A is a front view and FIG. 3B is a side view.

4A and 4B are diagrams showing a configuration of ring-shaped members 15A and 15B, wherein FIG. 4A is a front view and FIG. 4B is a side view.

FIG. 5 is a diagram showing a configuration of a ring-shaped member 16;
5A is a front view, and FIG. 5B is a side view.

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

FIG. 7 is a front view of a lubricant-containing member according to the prior art, shown straddling a guide rail.

FIG. 8 is a view showing the operation of a lubricant-containing member 11 according to a conventional technique.

FIG. 9 is a view similar to FIG. 6, showing a dimensional relationship with ring-shaped members 15A, 15B and 16 when two lubricant-containing members 11 according to the prior art are combined.

FIG. 10 shows ring-shaped members 15A and 15B when three lubricant-containing members 11 according to the prior art are combined.
FIG. 7 is a view similar to FIG.

FIG. 11 is a side view showing a lubricant-containing member used in the linear motion guide bearing device according to the first embodiment, together with a side seal and a reinforcing member.

FIG. 12 is a side view showing a lubricant containing member used for a linear motion guide bearing device according to a second embodiment, together with a side seal and a reinforcing member.

FIG. 13 is a side view showing a lubricant containing member used for a linear motion guide bearing device according to a third embodiment together with a side seal and a reinforcing member.

FIG. 14 is a side view showing a lubricant containing member used for a linear motion guide bearing device according to a fourth embodiment together with a side seal and a reinforcing member.

FIG. 15 is a side view showing a protrusion of a lubricant-containing member used in a linear motion guide bearing device according to a fifth embodiment.

FIG. 16 is a side view showing a protrusion of a lubricant-containing member used in a linear motion guide bearing device according to a sixth embodiment.

FIG. 17 is a side view showing a protrusion of a lubricant-containing member used in a linear motion guide bearing device according to a seventh embodiment.

FIG. 18 is a side view showing a projection of a lubricant-containing member used in a linear motion guide bearing device according to an eighth embodiment.

FIG. 19 is a side view showing a lubricant-containing member used for a linear motion guide bearing device according to a ninth embodiment together with a side seal and a reinforcing member.

FIG. 20 is a side view showing a lubricant containing member used for a linear motion guide bearing device according to a tenth embodiment together with a side seal and a reinforcing member.

FIG. 21 is a side view showing a lubricant containing member used for a linear motion guide bearing device according to an eleventh embodiment together with a side seal and a reinforcing member.

FIG. 22 is a front view showing a lubricant containing member used in a linear motion guide bearing device according to a twelfth embodiment together with a guide rail.

FIG. 23 is a front view showing a lubricant containing member used for a linear motion guide bearing device according to a thirteenth embodiment together with a guide rail.

FIG. 24 is a front view showing a lubricant containing member used in a linear motion guide bearing device according to a fourteenth embodiment, together with a guide rail.

FIG. 25 is a front view showing a lubricant containing member used in a linear motion guide bearing device according to a fifteenth embodiment together with a guide rail.

FIG. 26 shows a table T on a guide rail via a slider.
It is a perspective view which shows the state which attached.

FIG. 27 is a view similar to FIG. 26, showing a state in which a supply device 30B is mounted between the sliders 2.

28 shows two sliders 2 on one guide rail 1. FIG.
FIG. 13 is a perspective view showing a state in which a supply device 30B from which a joining member has been removed is attached.

FIG. 29 is a perspective view showing the supply device 30B in an exploded state.

[Explanation of symbols]

1 Guide rail 2 Slider 3A, 3B, 3C, 3A ', 3B', 3C 'Rolling element rolling groove 33A, 33B, 33C, 33D, 111, 112, 211, 212, 311, 312, 411, 412, 5
11,512,611,612,711,712, 811,812,911,1011,1111,121
1,1311,141 1,1511 部 材 Lubricated material

Claims (2)

[Claims] A slider is loosely fitted on an axially extending guide rail having a rolling element rolling groove on an outer surface, and the slider is opposed to a rolling element rolling groove of the guide rail. And a rolling element circulation path including a rolling element return path connected to both ends of the load rolling element rolling groove via a curved path,
A number of rolling elements for relatively moving the slider along the guide rails are loaded in the rolling element circulation path, and one or more lubricant-containing members made of rubber or resin containing a lubricant,
A linear guide bearing device disposed adjacent to at least one of a plate member and a side seal member disposed at an end of the slider, wherein at least a portion of the lubricant-containing member is in contact with the guide rail. The lubricant-containing member has a deformable protrusion that protrudes in a direction in which the guide rail extends, and the protrusion includes the plate-shaped member, the side seal member, and another By contacting at least one of the lubricant-containing members, the lubrication seeping out from the surface of the lubricant-containing member is provided between the member in contact with the protrusion and the lubricant-containing member having the protrusion. A linear guide bearing device, wherein a clearance is formed to allow the agent to travel downward. 2. A guide path for guiding the lubricant oozing out of the lubricant-containing member to the rolling element rolling groove is further formed on a surface of the lubricant-containing member on which the protrusion is provided. The linear motion guide bearing device according to claim 1, wherein: