JPH09303392A - Linear movement guide bearing device with lubricating agent supplying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically supply the lubricating oil to a slide guide surface of a guide shaft for a long time by forming a lubricating oil supplying member of the rubber or the synthetic resin, which includes the lubricating agent, and assembling this lubricating oil sppplying member in an oil supplying passage inside of a device. SOLUTION: When a linear guide device is driven, the lubricating oil, which is gradually seeped out from a lubricating oil supplying member 23 with a lapse of time by room temperature or a temperature rise due to the heat generation at the time of traveling of a slider 2, arrives a lubricating oil passage 17 of a return guide through an oil supplying passage, and flowed out into a curved passage 19 through an oil supply hole 14A of a return guide, and automatically supplied to a rolling body B rolling for pass through. Furthermore, the lubricating oil is flowed to a load rolling body rolling passage 5 and a rolling body rolling groove of a guide rail through the rolling body B, which rolls for circulation. At this stage, since the lubricating agent supplying member 23 is pushed by an elastic member 24, the supplying member 23 is gradually contracted so as to smoothly and continuously seep out the lubricating agent.

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 large number of rolling elements in a linear motion rolling guide bearing device, a rolling groove in which the rolling elements roll, or a sliding linear motion guide bearing device. Relates to a linear guide bearing device with a lubricant supply device capable of automatically supplying a lubricant to a sliding guide surface of a guide shaft for a long period of time.

[0002]

2. Description of the Related Art Conventionally, linear motion guide bearing devices generally used include a rolling motion guide bearing device and a sliding motion guide bearing device. The former is, for example, a linear guide device as shown in FIGS. This one is provided with a guide rail 1 as a guide shaft that has a rolling element rolling groove 3 on the outer surface and extends in the axial direction, and a slider 2 as a guided member that is assembled across the guide rail 1. It has been known. The slider 2 is composed of a slider body 2A and end caps 2B attached to both ends thereof, and the slider body 2A is provided on the inner side surface of both sleeve portions 4 so as to oppose the rolling element rolling groove 3 of the guide rail 1. The moving groove 5 is formed and a rolling element return path that axially penetrates through the thick wall portion of the sleeve portion is provided. On the other hand, the end cap 2B has a curved path that connects the rolling element rolling groove of the slider body 2A with the rolling element return path parallel to the rolling groove. A rolling element circulation path is formed. A large number of steel balls B, which are rolling elements, are loaded in the rolling element circulation path and in the load rolling element rolling groove 5.

[0003] The slider 2 assembled on the guide rail 1
The rolling elements B move smoothly along the guide rail 1 through the rolling of the rolling elements B in the rolling grooves 3 and 5 of the rolling elements facing each other, and during the movement, the rolling elements B move infinitely in the rolling element circulation path in the slider. Circulate. The slider 2 is provided with side seals 6 at both ends and under seals 7 on the lower surface to prevent dust.

Regarding the lubrication of such a conventional linear guide device, a grease nipple 9 or an oil supply pipe is usually attached to an oil supply joint 8 formed on the end cap 2B of the slider 2 (or the side surface of the slider body 2A). The rolling elements are lubricated by supplying grease or lubricating oil to the rolling element circulation circuit by using an external device such as a grease gun or an oil supply pump as needed.

[0005]

However, the lubrication system which directly uses the lubricating oil or grease as described above has various problems as follows.

Particularly when the linear guide bearing device is used in a high temperature environment, the lubricants filled in the device flow and flow out to the outside, so that the lubricant is consumed quickly and replenished in a short period of time. Must be repeated.

In addition, when used in an environment with a lot of foreign matter,
For example, in wood dust or powder-like foreign matter, the filled lubricant may absorb oil from the foreign matter, which may lead to poor lubrication.

Further, the location of use of the linear guide bearing device is often inside the mechanical device where it is difficult to replenish the lubricant from the outside. It is easy to forget to replenish grease regularly. In the case of oil, an oil supply pump and piping are required, resulting in high cost, and it is difficult to collect used oil.

Therefore, the present invention has been made by paying attention to such a conventional unsolved problem, and instead of supplying the lubricant from the outside of the linear guide bearing device, a rubber containing the lubricant or By forming a lubricant supply member with a synthetic resin material and incorporating this into the oil supply passage inside the device constituent members, the rolling elements and rolling element rolling grooves inside the device, or the guide shaft of the slide linear guide bearing device It is an object of the present invention to provide a long-acting linear guide bearing device with a lubricant supply device that can automatically and stably supply a lubricant to a sliding guide surface for a long period of time.

[0010]

According to a first aspect of the present invention which achieves the above object, a guided member is assembled to a guide shaft which has a rolling element rolling groove on its outer surface and extends in the axial direction. , The guided member includes therein a load rolling element rolling groove facing the rolling element rolling groove and a rolling element circulation path communicating with the load rolling element rolling groove, and the load rolling element rolling groove In a linear guide bearing device in which a large number of rolling elements are rotatably loaded in a rolling element circulation path, a guided member is provided with an oil supply hole communicating with the rolling element circulation path and / or the load rolling element rolling groove. And a lubricant supply member made of a rubber containing a lubricant or a synthetic resin is inserted into the oil supply hole.

According to a second aspect of the present invention, in a linear guide bearing device in which a guided member is assembled to a guide shaft that has a sliding guide surface on the outer surface and extends in the axial direction, the guided member is It is characterized in that it has an oil supply hole communicating with the slide guide surface, and a lubricant supply member made of a rubber containing a lubricant or a synthetic resin is inserted into the oil supply hole.

Here, the lubricant supply member in the linear motion guide bearing device with the lubricant supply device according to claim 1 or 2 may be elastically pressed by an elastic member.

The invention according to claim 1 of the present invention is characterized in that a lubricant supply member made of a rubber containing a lubricant or a synthetic resin is inserted in an oil supply hole provided in a guided member of a rolling linear guide bearing device, The contained lubricant gradually exudes over time, flows from the oil supply hole to the rolling element circulation path and / or the loaded rolling element rolling groove, and is evenly supplied to the surface of the rolling element. Therefore, without supplying grease or lubricating oil from the outside,
Stable lubrication is performed over a long period of time.

According to a second aspect of the present invention, a lubricant supply member made of a rubber containing a lubricant or a synthetic resin is inserted into an oil supply hole provided in a guided member of a sliding linear motion guide bearing device. The lubricant contained in advance is gradually exuded over time and is evenly supplied from the oil supply hole to the sliding guide surface of the guide shaft and the sliding surface of the guided member facing it. Therefore, stable lubrication can be performed for a long period of time without supplying grease or lubricating oil from the outside even in a bad environment of high temperature.

According to the third aspect of the present invention, the lubricant supply member inserted into the oil supply hole of the rolling linear motion guide bearing device or the sliding linear motion guide bearing device is elastically pressed by the elastic member. Therefore, the lubricant supply member is pressed against the elastic member and the lubricant contained therein is more abundantly supplied. Further, most of the contained lubricant can be squeezed from the lubricant supply member and supplied without wasting.

The lubricant-containing rubber or synthetic resin member of the present invention will be described in detail below. The lubricant-containing rubber or synthetic resin member of the present invention is a rubber or synthetic resin selected from the group of polyolefin-based rubbers or synthetic resins having basically the same chemical structure such as polyethylene, polypropylene, polybutylene, and polymethylpentene. As a lubricant, paraffin hydrocarbon oil such as poly α-olefin oil, naphthene hydrocarbon oil, mineral oil, ether oil such as dialkyldiphenyl ether oil, ester oil such as phthalate ester, trimellitate ester, etc. After mixing and heating and melting any of them, it is poured into a predetermined mold and cooled and solidified while pressurizing and molded, and an antioxidant, a rust inhibitor, an antiwear agent, a defoaming agent, an extreme pressure agent are prepared in advance. It is also possible to add various additives such as

The composition ratio of the lubricant-containing rubber or synthetic resin member is 20 to 90% by weight of the polyolefin rubber or synthetic resin and 80 to 10% by weight of the lubricant based on the total weight. When the content of the polyolefin rubber or the synthetic resin is less than 20% by weight, the hardness and strength required for the seal cannot be obtained. Further, when the content of the polyolefin rubber or the synthetic resin exceeds 90% by weight (when the amount of the lubricant is less than 10% by weight), the supply of the lubricant is reduced and the lubrication failure of the linear guide device itself occurs.

The above-mentioned groups of rubbers or synthetic resins have the same basic structure but different average molecular weights, and are 1 × 10 ³ to.
The range is 5 × 10 ⁶ . Among them, a relatively low molecular weight compound having an average molecular weight of 1 × 10 ³ to 1 × 10 ⁶ and an ultrahigh molecular weight compound having an average molecular weight of 1 × 10 ^{6 to} 5 × 10 ⁶ are mixed alone or as needed. To use.

In order to improve the mechanical strength of the lubricant-containing rubber or synthetic resin member of the present invention, the following thermoplastic resin and thermosetting resin are added to the above-mentioned polyolefin rubber or synthetic resin. It may be one.

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

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-based rubber or synthetic resin and the other resin in a more uniform state, a suitable compatibilizer may be added as necessary.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. In addition, the same or corresponding portions are denoted by the same reference numerals, and duplicate description is omitted.

First, as an embodiment of the linear motion guide bearing device of the present invention, the overall structure of a linear guide device which is a rolling linear motion guide bearing device will be described. In FIGS. 1 and 2, a slider 2 having a substantially U-shaped cross section as a guided member is mounted on a rectangular guide rail 1 as a guide shaft so as to be relatively movable in the axial direction. End caps 2B are detachably fixed to both ends of the main body 2A of the slider 2 in the axial direction. In the case of this embodiment, two rolling element rolling grooves 3 each having an axially concave groove having a substantially semicircular cross section are formed on both side surfaces 1b of the guide rail 1.

On the other hand, a load rolling element rolling groove 5 having a substantially semicircular cross section is formed on the inner surface of both sleeve portions 4 of the main body 2A of the slider 2 so as to face the rolling element rolling groove 3 of the guide rail 1. Has been done. Reference numeral 10 is a screw hole into which a screw for mounting the end cap 2B is screwed.

Further, rolling element return paths 11 consisting of through-holes having a circular cross section in the axial direction parallel to the load rolling element rolling groove 5 are formed in the upper and lower two stages in the thick portion of the sleeve portion 4 of the slider body 2A. ing.

The end cap 2B is an injection-molded product made of a synthetic resin material and is formed into a substantially U-shaped cross section. And
The junction surface of the slider main body 2A in the (back side) 2B _b, Fig 3
As shown in FIG. 2, semi-circular recesses 12 are formed in upper and lower stages on both sleeves, and a semi-cylindrical recess groove 13 is provided across the center of each semi-circular recess 12. . A semi-cylindrical return guide 14 shown in FIGS. 4 and 5 is fitted in the semi-cylindrical groove 13. On the outer diameter surface of the return guide 14, at a position corresponding to the semicircular recess 12,
The groove 15 having an arcuate cross-section that serves as a guide surface for the rolling element B is formed in two upper and lower stages. A concave portion on the inner diameter side of the return guide 14 is a lubricant passage 17, and a through hole extending from the lubricant passage 17 to the concave groove 15 on the outer diameter side is formed as an oil supply hole 14A.

The return guide 14 of this embodiment is an injection-molded article of synthetic resin material. By incorporating such a return guide 14 in the semi-circular recess 12 on the back surface of the end cap, a semi-doughnut-shaped curved path 19 having a circular cross section is formed in upper and lower two steps on the back surface 2B _b of the end cap 2B. The end cap 2B is attached to the slider body 2A, and the load rolling element rolling groove 5 and the rolling element return path 11 of the slider body 2A are made to communicate with each other in the upper and lower stages by the curved path 19 as shown in FIG.

The rolling element return path 11 and the curved paths 19, 19 at both ends thereof form a rolling element circulation path, and a large number of rolling elements B can freely roll in the path and in the loaded rolling element rolling groove 5. Has been inserted into.

Next, the oil supply structure of the above linear guide device will be described. The oil supply structure of this embodiment uses the existing oil supply path of the end cap 2B as it is. Here will be described the details of the oil supply path of the end cap 2B, a surface 2B _a of the end cap 2B, the center of the connecting portion connecting the left and right sleeves, oil supply hole 21 for grease or oil supply is provided with the back surface It penetrates to 2B _b .
A female screw 8 as an oil supply joint is formed on the inlet side of the oil supply hole 21, and conventionally, a grease nipple or an oil supply pipe joint is screwed and attached to this. On the back surface 2B _b of the end cap 2B is provided with the oil supply hole 21, the oil supply passage 22 for communicating the groove 13 of semi-cylindrical for return guide mounting formed on both sleeves are formed. Then, the oil supply passage 22 is pulled out from the lubricant passage 17 on the inner diameter side of the return guide 14 assembled in the semi-cylindrical concave groove 13 to the concave groove 15 on the outer diameter side via the oil supply hole 14A, and is formed on both left and right sleeves. The upper and lower curved paths 19 communicate with each other (see FIGS. 3 and 5).

In this embodiment, as shown in FIGS. 1 and 7, a cylindrical lubricant-containing rubber is introduced from the surface 2B _a side into the oil supply hole 21 formed of a through hole provided in the slider body 2A. Alternatively, a lubricant supply member 23 made of synthetic resin and an elastic member 24 such as a coil spring that presses the lubricant supply member 23 are inserted, and a set screw 25 is screwed and fixed to the female screw 8.

The composition of the lubricant supply member 23 is, for example, paraffinic mineral oil (FBKRO100 manufactured by Nippon Oil Co., Ltd.).
75 wt%, low molecular weight polyethylene (Mitsubishi Yuka Co., Ltd. P
Z50U) is set to 16 wt%, and ultra-high molecular weight polyethylene (Miperon XM220, Mitsui Petrochemical Co., Ltd.) is set to 9 wt%.

Next, the operation of the first embodiment will be described. When the slider 2 moves on the guide rail 1 fixed to the machine base, the rolling element B moves in the moving direction of the slider 2 at a slower speed than the slider 2 while rolling in the load rolling element rolling path 5, and the one end side Make a U-turn on the curved path 19 of the rolling element return path 1
1 is repeated while rolling in the opposite direction, and makes a reverse U-turn in the curved path 19 on the other end side to return to the inside of the load rolling element rolling path 5 to repeat the circulation.

When the linear guide device is driven in this way, the lubricant that gradually exudes over time from the lubricant supply member 23 due to the temperature rise due to the heat generated when the slider 2 travels at room temperature passes through the oil supply passage 22. Return guide 1
4 to the lubricant passage 17, flows from there through the oil supply hole 14A of the return guide into the curved passage 19, and is automatically supplied to the rolling element B passing therethrough while rolling. Furthermore, the lubricant is spread over the rolling element rolling path 5 of the load rolling element 5 and the rolling element rolling groove 3 of the guide rail via the rolling element B which moves circularly.
In the present embodiment, since the lubricant supply member 23 is pressed by the elastic member 24, the lubricant easily exudes. Although the lubricant supply member 23 gradually contracts as the lubricant is gradually released from the lubricant supply member 23, the elastic member 24 is elastically pressed so that the lubricant can be exuded more smoothly and continuously.

Therefore, even if the lubricant is not supplied to the slider 2 from the outside, the operation of the linear guide device which is stable with a low torque and can be continued for a long time.
According to the present embodiment, even when the linear guide device is used in a high temperature environment, the lubricant contained in the lubricant supply member 23 does not flow and flow out to the outside early. , There is no need to repeat the supply in a short period of time.
Further, even in the case of use in an environment with a lot of foreign matter, the lubricant contained in the lubricant supply member 23 is not absorbed by the foreign matter, so that there is no possibility of causing lubrication failure. Further, since it is not necessary to replenish the lubricant from the outside of the linear guide device for a long time, the lubrication is easy even when the linear guide device is installed inside the mechanical device. Further, unlike the conventional case, an oil supply pump and piping are not required, and the cost is low.

Next, FIG. 8 shows a second embodiment of the present invention. In the second embodiment, the slider body 2A
The end face of the end cap 2B is provided with a lubricant supply member accommodation hole 26 corresponding to the oil supply hole 21 and having the same diameter as the oil supply hole 21 and a predetermined depth and serving as an oil supply hole. The difference from the first embodiment is that a lubricant supply member 23 that is longer than the embodiment is used. Thereby, there is an advantage that the lubricant can be continuously supplied to the rolling element B, the rolling element rolling groove 3 and the load rolling element rolling path 5 of the linear guide device for a longer time. Other functions and effects are similar to those of the first embodiment.

Next, a third embodiment of the present invention is shown in FIG. In the third embodiment, the lubricant supply member storage hole 26 in the second embodiment has a longer length (depth) and a larger inner diameter. The lubricant supply member 23B having a larger length and diameter size is inserted into the lubricant supply member storage hole 26, and is covered with the spacer 28. Then, after assembling the end cap 2B,
Insert the elastic member 24 and the set screw 25 into the oil supply hole 21,
Similarly to the above, the lubricant supply member 23 is pressed and fixed via the spacer 28.

As the size of the lubricant supply member 23 is increased, the amount of the contained lubricant is increased, and the lubricant is applied to the rolling element B, the rolling element rolling groove 3 and the load rolling element rolling path of the linear guide device for a long time. 5 can be continuously supplied. Other functions and effects are similar to those of the first embodiment.

Next, FIG. 10 shows a fourth embodiment of the present invention. In the fourth embodiment, the lubricant supply member accommodating hole 26 in the second embodiment is further extended and penetrated to the opposite end side of the slider body 2A, and the lubrication has a length extending to almost the entire length of the through hole. After inserting the agent supply member 23, the elastic member 24 and the set screw 25 are respectively inserted and fixed in the oil supply holes 21 of the end caps 2B assembled to both ends of the slider body 2A. Spacer 28 if necessary
To use.

Since the amount of the lubricant contained in the lubricant supply member 23 is larger, automatic lubrication for a longer time becomes possible. Other functions and effects are similar to those of the first embodiment. Next, a fifth embodiment of the present invention is shown in FIGS.

The fifth embodiment is a slider body 2A.
This embodiment differs from the above-described embodiments in that the lubricant supply device of the present invention is attached to the side surface of the above. That is, the slider body 2A
The oil supply joint 8A and the oil supply hole 21A are provided on one side surface of the slider body 2 and the oil supply hole 21A is extended to form the slider body 2
A lubricant supply member storage hole 26 reaching the central portion of A is formed. Further, an oil supply passage 29 that intersects with the lubricant supply member storage hole 26 and penetrates the central portion of the slider body 2A in the axial direction is formed coaxially with the oil supply hole 21 provided in the end cap 2B. Then, the lubricant supply member 23 is inserted into the lubricant supply member storage hole 26, and is fixed by the elastic member 24 and the set screw 25A. The oil supply holes 21 of the end caps 2B attached to both ends of the slider body 2A are covered with setscrews 25 screwed onto the female screw 8. The lubricant that has exuded from the lubricant supply member storage hole 26 passes through the oil supply passage 29 in the axial direction of the slider body 2A as shown by the arrow Y, and then the oil supply passage 22 of the end cap 2B.
After that, it flows through the same route as in the case of each of the above-described embodiments and reaches the rolling element B, the load rolling element rolling path 5, and the rolling element rolling groove 3 of the guide rail.

In the case of this embodiment, the lubricant supply member 2
There is an advantage that the end cap 2B does not have to be removed when the 3 is put into and taken out from the lubricant supply member storage hole 26, and the detaching work can be easily performed. Other functions and effects are similar to those of the first embodiment.

Next, a sixth embodiment of the present invention is shown in FIGS. The sixth embodiment is the same as the fifth embodiment.
In the same manner as in the above embodiment, the lubricant supply device of the present invention is attached to the side surface of the slider body 2A, but a lubricant supply member 23 having a larger length and diameter is attached to increase the amount of lubricant retained. ing. That is, the oil supply hole 21A on the side surface of the slider body 2A is penetrated to the side surface on the opposite side, and the lubricant supply member storage hole 26 having a larger diameter is coaxially provided from the side surface on the opposite side. The lubricant supply member 23 has a large diameter and long length in the lubricant supply member storage hole 26.
Is inserted, and the cover is fixed with a set screw 30. On the other hand, the elastic member 24 is inserted into the oil supply hole 21A, and then the oil supply joint 8A is inserted.
The set screw 25A is screwed onto the female screw of the lubricant supply member 2
Repress 3 as appropriate. The flow of the lubricant in this case is the same as in the case of the fifth embodiment. Lubricant supply member 23
Can be easily taken out by removing the set screw 30.

Furthermore, a seventh embodiment of the present invention is shown in FIGS. In the seventh embodiment, the lubricant supply device of the present invention is applied to a ball spline device which is one of rolling linear motion guide devices, not a linear guide device.

That is, the ball spline shaft 32 as a guide shaft has a linear ball spline groove 34 extending in the axial direction on the outer peripheral surface thereof. A ball spline nut 36 as a guided member is fitted to the ball spline shaft 32 via a large number of balls B. The ball spline nut 36 has a ball spline groove 35 corresponding to the ball spline groove 34 linearly extending along the ball spline shaft 32 on the inner peripheral surface thereof, and the ball spline groove 35 of the nut.
A large number of balls B are rotatably interposed between the ball spline shaft 32 and the ball spline groove 34 of the ball spline shaft 32. Although not shown, the ball spline nut 36 is formed with a circulation path for these balls, and the ball B moves in the ball spline groove 35 together with the relative linear movement of the ball spline shaft 32 and the ball spline nut 36. It has a structure in which it rolls and moves linearly, reaches the end of the nut, enters the return passage in the nut, makes a U-turn, returns to its original position, and repeats circulation.

An oil supply passage 41 extending from the upper surface of the housing 38 of the ball spline device constructed as described above to the outer peripheral groove 40 provided at the opposing portion of the ball spline nut 36.
(The opening on the upper surface side is closed with a plug 42), and the side surface of the housing 38 has an opening.
A lubricant supply member accommodating hole 26 intersecting with No. 1 is provided.
In addition, the oil supply passage 41 is provided in the outer peripheral groove 40 with the nut 3
An oil supply hole 41A communicating with the inner peripheral side of 6 is formed at three locations.

The lubricant supply member 23 is inserted into the lubricant supply member storage hole 26, then the elastic member 24 is mounted, and the set screw 25 is screwed into the female screw 8 at the entrance to mount the lubricant supply device. To be The lubricant that exudes from the lubricant supply member 23 flows down the oil supply passage 41, and the oil supply hole 41
Lubrication is carried out from A to the inner peripheral side of the nut 36 and reaches the rolling element B, the ball spline groove 34, and the like. Also in this case, in order to increase the lubricant supply amount by increasing the lubricant supply member 23, the diameter of the lubricant supply member storage hole 26 can be enlarged or the housing 38 can be penetrated.

The rolling linear guide bearing device to which the present invention can be applied is not limited to the type of the embodiment. For example, in the linear guide device, the load rolling element rolling groove may have a groove other than two grooves on one side. May be a ball instead of a ball.

Subsequently, an eighth embodiment of the present invention is shown in FIGS. In the eighth embodiment, the lubricant supply device of the present invention is applied to a sliding linear motion guide device instead of a rolling linear motion guide bearing.

That is, the slide guide shaft 50 has a slide guide surface 51 on the upper surface and guide slopes 52 on both side surfaces. On the slide guide shaft 50, a guided member 53 having a substantially U-shaped cross section is laid across the slide guide shaft 50 so as to be relatively slidable in the axial direction.
An axially long oil supply hole 54 is provided at the center of the guided member 53 in the width direction. An oil supply passage 55 that communicates with the slide guide surface 51 on the upper surface of the slide guide shaft 50 is branched and formed in the oil supply hole 54. The oil supply hole 54
A cylindrical lubricant supply member 23 made of rubber or synthetic resin containing a lubricant and an elastic member 24 such as a coil spring that presses the cylindrical lubricant supply member 23 are inserted into the female screw 8, and the set screw 25 is screwed into the female screw 8 to be fixed. ing.

Lubricant Y exuding from the lubricant supply member 23
Lubricates down the oil supply passage 55 and reaches the sliding guide surface 51 on the upper surface of the sliding guide shaft 50 for lubrication. Also in this case, in order to increase the lubricant supply amount by increasing the lubricant supply member 23, it is possible to increase the diameter or length of the oil supply hole 54 that accommodates the lubricant supply member 23. . Also,
The direction of the oil supply hole 54 is not limited to the axial direction, and may be provided, for example, in the direction orthogonal to the axis.

[0052]

As described above, according to the first aspect of the present invention.
According to the invention described above, the guided member that is linearly moved by being guided by the guide shaft is provided with an oil supply hole communicating with the internal rolling element circulation path and / or the load rolling element rolling groove, and the oil containing hole contains a lubricant. Since it is a linear guide bearing with a lubricant supply device that inserts a lubricant supply member made of rubber or synthetic resin, the lubricant gradually exudes over time from the lubricant supply member and is automatically supplied to the rolling element surface. By the rolling of the rolling element, the load is evenly supplied to the rolling path of the rolling element, and as a result, stable self-lubrication is performed for a long period of time.

More specifically, even if the lubricant is not supplied to the guided member from the outside, the smooth and stable operation with low torque can be continued for a long time, and the linear guide bearing device can be used in a high temperature environment. In such a case, the lubricant contained in the lubricant supply member does not flow and flow out to the outside in an early stage, so it is not necessary to repeat the replenishment in a short period of time, and in an environment with many foreign substances. Even when used inside, the lubricant contained in the lubricant supply member will not be sucked up by foreign matter, so there is no risk of poor lubrication, and the linear guide bearing device Lubrication from the outside is unnecessary, so lubrication is easy even when a linear motion guide bearing device is installed inside the mechanical device.In addition, unlike the conventional case, an oil supply pump or piping is not required, and low lubrication is required. Is the cost , Various effects can be obtained.

According to the invention of claim 2 of the present invention,
The present invention is applied to a slide linear motion guide bearing in which a guided member is assembled to a guide shaft extending in the axial direction having a sliding guide surface on the outer surface, and an oil supply hole communicating with the sliding guide surface is provided in the guided member. Since a linear guide bearing with a lubricant supply device is provided in which a lubricant supply member made of rubber containing lubricant or synthetic resin is inserted into the oil supply hole, the same self-lubricating function as in the case of the above-mentioned claim 1 can be obtained. can get.

According to the invention of claim 3 of the present invention,
Since the lubricant supply member in the above claims 1 and 2 is elastically pressed by the elastic member, the lubricant contained in the lubricant supply member is more abundantly supplied.
The effect is that most of the content can be used without waste.

[Brief description of drawings]

FIG. 1 is a front view of a linear guide device that is a linear guide bearing device of the present invention.

FIG. 2 is an exploded perspective view of a slider which is a guided member of the linear guide device of FIG.

FIG. 3 is a perspective view of a rear surface side of an end cap of the linear guide device of FIG.

FIG. 4 is a front view of a return guide of the linear guide device of FIG.

5 is a perspective view of the back surface side of the end cap of the linear guide device of FIG. 1. FIG.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.

FIG. 7 is a cross-sectional view of essential parts of an embodiment of a lubricant supply device of the present invention.

FIG. 8 is a cross-sectional view of essential parts of another embodiment of the lubricant supply device of the present invention.

FIG. 9 is a cross-sectional view of essential parts of another embodiment of the lubricant supply device of the present invention.

FIG. 10 is a cross-sectional view of essential parts of another embodiment of the lubricant supply device of the present invention.

FIG. 11 is a perspective view illustrating a mounting mode of another embodiment of the lubricant supply device of the present invention.

12 is a cross-sectional view of the main part of FIG.

FIG. 13 is a perspective view illustrating a mounting manner of still another embodiment of the lubricant supply device according to the present invention.

14 is a cross-sectional view of the main parts of FIG.

FIG. 15 is a schematic plan view of a ball spline device that is a linear guide bearing device of the present invention.

16 is a cross-sectional view of the main parts of FIG.

FIG. 17 is a perspective view of an embodiment example in which the lubricant supply device of the present invention is applied to a sliding linear motion guide bearing device.

18 is a front view of the sliding linear guide bearing device of FIG.

FIG. 19 is a side view showing a part of the sliding linear motion guide bearing device of FIG. 17 in a cutaway manner.

FIG. 20 is a perspective view of a linear guide device that is a conventional linear guide bearing device.

21 is a rear perspective view of the slider shown in FIG. 20. FIG.

[Explanation of symbols]

 1 Guide shaft 2 Guided member 3 Rolling element rolling groove 5 Load rolling element rolling groove 11 Rolling element circulation path (rolling element return path) 19 Rolling element circulation path (curved path) 21 Oil supply hole 23 Lubricant supply member 24 Elastic Member 26 Lubrication hole (lubricant supply member storage hole) B Rolling element 50 Guide shaft (slip guide shaft) 51 Sliding guide surface 53 Guided member 54 Oil supply hole (lubricant supply member storage hole)

Claims (3)

[Claims] 1. A guided member is assembled to a guide shaft that has a rolling element rolling groove on an outer surface and extends in an axial direction, and the guided member has a load rolling element facing the rolling element rolling groove therein. A linear motion guide provided with a rolling groove and a rolling element circulation path communicating with the load rolling element rolling groove, and a large number of rolling elements being rotatably loaded in the load rolling element rolling groove and the rolling element circulation path. In the bearing device, the guided member is provided with an oil supply hole communicating with the rolling element circulation path and / or the load rolling element rolling groove, and a lubricant supply made of a rubber containing a lubricant or a synthetic resin is provided in the oil supply hole. A linear motion guide bearing device with a lubricant supply device, wherein a member is inserted. 2. A linear guide bearing device in which a guided member is attached to a guide shaft extending in the axial direction and having a sliding guide surface on the outer surface, and the guided member has an oil supply hole communicating with the sliding guide surface. A linear guide bearing device with a lubricant supply device, characterized in that a lubricant supply member made of a rubber or a synthetic resin containing a lubricant is inserted into the oil supply hole. 3. The lubricant supply member is elastically pressed by an elastic member.
A linear guide bearing device with a lubricant supply device as described above.