JP2016056936A - Rolling bearing guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing guide device capable of lubricating a rolling body for a long term, and reducing labor of maintenance.SOLUTION: A rolling bearing guide device includes: a lubricant storage part 28 storing lubricant; a guide material 14 arranged between a slider body 8 and an end cap 9b, constituting parts of direction change paths 15a-15d, and guiding lubricant from the lubricant storage part 28 to the direction change paths by a capillary phenomenon; and an oil supply material held by the guide material 14, impregnating lubricant guided by the guide material 14, and contacting with a rolling body 16 passing the direction change paths 15a-15d and supplying the lubricant to the rolling body 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rolling bearing guide device that includes guide rails, sliders, and rolling elements, and is used in various robots, transfer devices, semiconductor manufacturing devices, and the like.

  Conventionally, as a rolling bearing guide device, a linear motion guide device having a linearly extending guide rail and a curved motion guide device having a curved guide rail are known.

  The linear motion guide device includes, for example, a linear guide rail and a slider straddling the guide rail so as to be relatively movable in the longitudinal direction of the guide rail. The slider includes a slider body and a slider sliding End caps are provided at both ends, which are sometimes forward or backward, and a large number of rolling elements roll on a rolling path between the guide rail and the slider body while circulating through a circulating path formed in the slider. This realizes a smooth relative movement between the guide rail and the slider. Since the linear motion guide device can be mounted in any direction, in this application, as shown in FIG. 1, the extending direction of the guide rail 2 is perpendicular to the X axis direction and the X axis direction. A direction parallel to the surface of the guide rail 2 in contact with the part is defined as a Y-axis direction, and a direction perpendicular to both the X-axis direction and the Y-axis direction is defined as a Z-axis direction.

  The curved motion guide device includes a curved guide rail such as a ring, a slider configured to be slidable on the curved guide rail, and a rolling element.

  In such a rolling bearing guide device, the return guide constituting the inner peripheral surface of the slider body side of the direction changing path that changes the direction in which the rolling element moves before and after the slider penetrates from the slider body side to the direction changing path side. There is a type in which a through hole is provided, and a lubricant is supplied from a lubricant supply path provided on the slider main body side of the return guide into the direction change path through the through hole (for example, Patent Document 1).

  In addition, there is a type in which a member having an oil supply groove is provided on the slider body side of the end cap, and a lubricant is supplied into the direction change path through the oil supply groove (for example, Patent Document 2).

JP 2008-291938 A JP 2010-185582 A

  However, in the inventions described in Patent Document 1 and Patent Document 2, since the oil passage is opened in the direction change path, a large amount of lubricant is supplied to the direction change path immediately after the lubricant is injected from the outside, and flows out. Therefore, it is difficult to lubricate the rolling elements for a long time.

  In view of such a problem, an object of the present invention is to provide a rolling bearing guide device that makes it possible to lubricate a rolling element over a long period of time and reduce maintenance work.

In order to solve the above problems, in the present invention,
A guide rail,
A slider body that slides on the guide rail;
A rolling element that rolls between the slider body and the guide rail as the slider body slides;
In a rolling bearing guide device having an end cap that is attached to an end face of the slider main body that is forward or backward during the sliding and that constitutes a direction changing path that changes a moving direction of the rolling element,
A lubricant reservoir for storing the lubricant;
A guide material that is disposed between the slider body and the end cap and constitutes a part of the direction change path, and guides the lubricant from the lubricant reservoir to the direction change path by capillary action;
An oil supply material that is held by the guide material, impregnated with the lubricant guided by the guide material, and in contact with the rolling element that passes through the direction change path, and supplies the lubricant to the rolling element. A rolling bearing guide device is provided.

  Preferably, the apparatus further includes a second guide material that guides the lubricant stored in the lubricant storage portion to the guide material by capillary action.

  Preferably, the lubricant reservoir is configured by a lubricant container provided adjacent to the end cap.

  Preferably, the lubricant storage portion is constituted by a recess formed in the end cap.

  Preferably, the lubricant reservoir is configured by a hole formed in the slider body.

  Preferably, the guide member is disposed on both sides of the guide rail, constitutes a part of the direction turning path, and a pair of leg portions that hold the fueling material, and the pair of leg portions are integrated with each other. It consists of a formed body.

  Preferably, the guide member includes a pair of legs that are disposed on both sides of the guide rail, constitute a part of the direction change path, and hold the oil supply material.

  According to the present invention, it is possible to provide a rolling bearing guide device that makes it possible to lubricate rolling elements over a long period of time and reduce maintenance work.

It is a perspective view which shows the rolling bearing guide apparatus which concerns on 1st Embodiment. It is a figure which shows the end cap of the rolling bearing guide apparatus which concerns on 1st Embodiment, a guide material, a lubricant container, and a side seal. (A) shows the surface on the slider body side, and (b) shows an AA cross section in (a). It is a figure which shows the end cap of the rolling bearing guide apparatus which concerns on 1st Embodiment. (A) shows the surface on the slider body side, (b) shows the BB cross section in (a), and (c) shows the surface opposite to the slider body. It is a figure which shows the induction | guidance | derivation material of the rolling bearing guide apparatus which concerns on 1st Embodiment. (A) shows a surface on the end cap side, (b) shows a side surface, (c) shows a lower surface, and (d) shows an enlarged CC cross section in (a). It is a figure which shows the lubricant container of the rolling bearing guide apparatus which concerns on 1st Embodiment. (A) shows the side seal side surface, and (b) shows the oil-containing material accommodated in the lubricant container. It is a figure which shows the end cap and induction | guidance | derivation material of the rolling bearing guide apparatus which concern on 2nd Embodiment. (A) shows the surface on the slider body side, (b) shows the DD cross section in (a), (c) shows the end cap side surface of the induction material, and (d) shows (c). The inside expanded EE cross section is shown. It is a figure which shows the slider main body, end cap, and induction | guidance | derivation material of the rolling bearing guide apparatus which concern on 3rd Embodiment. (A) shows the surface of the slider main body to which the end cap is attached, and (b) shows the FF cross section in (a).

(First embodiment)
A rolling bearing guide device 1 according to a first embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a rolling bearing guide device 1 according to the first embodiment.

  As shown in FIG. 1, the rolling bearing guide device 1 includes a long and narrow rectangular guide rail 2 and a slider 3 straddling the guide rail 2 so as to be relatively movable in the longitudinal direction of the guide rail 2. ing.

  The guide rail 2 is made of metal, and a plurality of bolt holes 4 penetrating in the Z-axis direction are formed. The length of the guide rail 2 can be appropriately adjusted according to the application. The guide rail 2 is formed with corner rolling grooves 5a, 5b and side rolling grooves 6a, 6b having a substantially arc-shaped cross section extending in the X-axis direction. Escape grooves are formed at the bottoms of the side rolling grooves 6a and 6b. The guide rail 2 can be fixed to a mounting portion (not shown) such as a machine table by a bolt 7 passing through the bolt hole 4.

  The slider 3 is attached to the slider main body 8 via the metal slider main body 8, end caps 9a and 9b attached to the front and rear of the slider main body 8 in the sliding direction, and the end caps 9a and 9b. And side seals 11a and 11b attached to the slider body 8 via the end caps 9a and 9b and the lubricant containers 10a and 10b. The lubricant stored in the lubricant containers 10a and 10b includes lubricating oil and grease. Examples of the lubricating oil include mineral oil, mixed oil of synthetic oil and synthetic hydrocarbon oil, mixed oil of mineral oil and synthetic hydrocarbon oil, and synthetic hydrocarbon oil. Examples of the grease include lithium, diurea, and urea compounds.

  The side seals 11 a and 11 b are made of an elastic body and have a lip portion that is in sliding contact with the guide rail 2, and prevent foreign matter from entering between the slider 3 and the guide rail 2.

  In the rolling bearing guide device 1, a plurality of rolling elements 16, which will be described later, housed in the slider 3 are formed by the rolling groove formed in the guide rail 2 and the rolling groove formed in the slider body 8 so as to face the rolling groove. The slider 3 is configured to be linearly movable by rolling in the formed rolling path. When the rolling element 16 rolling on the rolling path approaches the end of the slider 3, the rolling element 16 is scooped up by the ends of direction changing paths 15a to 15d described later formed by the end caps 9a and 9b. The traveling direction is changed by 180 ° by 15d, passes through a return path formed in the slider body 8, and moves to the opposite end caps 9a, 9b. The rolling elements 16 that have reached the opposite end caps 9a and 9b are again changed in the direction of travel by 180 ° by the direction change paths 15a to 15d and returned to the rolling paths. Thus, the rolling bearing guide device 1 is configured such that the rolling elements 16 circulate infinitely.

  FIG. 2 is a view showing the end cap 9b, the guide member 14, the lubricant container 10b, and the side seal 11b of the rolling bearing guide device 1 according to the first embodiment. (A) shows the surface on the slider body 8 side, and (b) shows an AA cross section in (a). Since the end cap 9a side has the same configuration as the end cap 9b side described below, description thereof is omitted.

  As shown in FIG. 2A, the end cap 9b includes a barrel portion 12 formed in a substantially rectangular column shape that is long in the Y-axis direction, and one side in the Z-axis direction from both ends of the barrel portion 12 (see FIG. It consists of leg portions 13a and 13b projecting downward to a). An induction material 14 made of a porous sintered alloy is fitted on the slider body 8 side of the end cap 9b. The guide member 14 has a configuration in which the body portion 22 and the leg portions 23a and 23b are integrally formed. In addition, as a material of the induction | guidance | derivation material 14, a porous polymer material (plastic, elastomer, rubber | gum) can also be used. The guide member 14 guides the lubricant of approximately the same amount as the lubricant applied to the rolling element 16 to the contact portion with the rolling element 16. In addition, the trunk | drum 22 and the leg parts 23a and 23b of the induction | guidance | derivation material 14 may be shape | molded as a different body, and you may arrange | position and contact.

  Direction change paths 15a and 15b are formed at the boundary portion between the body portion 12 and the leg portion 13a of the end cap 9b and at the boundary portion between the body portion 12 and the leg portion 13b, respectively. Moreover, direction change paths 15c and 15d are formed at the tip side portions of the leg portions 13a and 13b, respectively. The direction change paths 15a to 15d are formed in a groove shape on the end cap 9b constituting the outer surface (mainly the surface on the side seal 11b side) and the inner surface (mainly the surface on the slider body 8 side). It is comprised from the leg parts 23a and 23b of the induction | guidance | derivation material 14 which comprises.

  The direction change paths 15a to 15d are formed to be curved in an arc shape and move the rolling element 16 that rolls between the slider body 8 and the corner rolling grooves 5a and 5b and the side rolling grooves 6a and 6b. The direction is changed by 180 degrees, and the rolling element 16 is circulated together with a circulation path (not shown) formed in the slider body 8. 2A shows a state in which the rolling elements 16 are accommodated in the direction change paths 15a and 15c, but the rolling elements 16 are similarly accommodated in the direction change paths 15b and 15d.

  The end cap 9b, the lubricant container 10b, and the side seal 11b are fixed to the slider body 8 with screws between the direction change path 15a and the direction change path 15c and between the direction change path 15b and the direction change path 15d, respectively. Through-hole portions 17a and 17b are formed. Each of the through-hole portions 17a and 17b forms a hole penetrating in the X-axis direction and protrudes in a cylindrical shape toward the slider main body 8 side. These cylindrical portions are fitted with an enlarged diameter hole portion (not shown) formed in an opening portion of a screw hole formed in the slider body 8, so that the end cap 9 b when the end cap 9 b is attached to the slider body 8. To facilitate positioning.

  As shown in FIG. 2B, a lubricant container 10b for storing a lubricant is disposed on the opposite side of the slider body 8 with the end cap 9b interposed therebetween. A side seal 11b is disposed on the opposite side of the end cap 9b with the lubricant container 10b interposed therebetween.

  The lubricant container 10b contains an oil-containing material 32, and the oil-containing material 32 is impregnated with a lubricant. A columnar guide material 37 that connects the oil-containing material 32 and the guide material 14 is fitted into the end cap 9b and the lubricant container 10b. The induction material 37 is made of a porous sintered alloy and is disposed in contact with the oil-containing material 32. Thereby, the lubricant impregnated in the oil-containing material 32 is supplied to the trunk portion 22 of the induction material 14 via the induction material 37 by capillary action. It is desirable that the sintered alloy of the induction material 37 has a lower density than the sintered alloy of the induction material 14. Thereby, it is possible to prevent the guide material 14 from excessively supplying the lubricant to the rolling elements while the guide material 37 smoothly guides the lubricant to the guide material 14.

  The lubricant supplied to the guide member 14 is guided from the trunk portion 22 to the leg portions 23a and 23b by capillary action, and is transferred from oil supply materials 42a to 42b (see FIG. 4) described later held on the leg portions 23a and 23b. It is applied to the moving body 16. By utilizing the capillary phenomenon, the lubricant can be supplied to the rolling element 16 regardless of the orientation of the rolling bearing guide device 1. Further, when the capillary phenomenon is not used, the lubricant in the lubricant containers 10a and 10b and the end caps 9a and 9b is temporarily biased to one side by the movement of the slider 3, and the end caps from the lubricant containers 10a and 10b. Although there is a possibility that the lubricant does not easily flow to 9a and 9b, this can be prevented by utilizing the capillary phenomenon. When it is necessary to replenish the lubricant stored in the lubricant container 10b, the side seal 11b can be removed and replenished, or replaced with another lubricant container 10b filled with the lubricant. it can.

  FIG. 3 is a view showing the end cap 9b of the rolling bearing guide device 1 according to the first embodiment. (A) shows the surface on the slider body 8 side, (b) shows the BB cross section in (a), and (c) shows the surface opposite to the slider body 8.

  In the center of the body portion 12 of the end cap 9b, a guide material insertion hole 20 that penetrates in the X-axis direction and accommodates the guide material 37 is formed.

  Further, on both the left and right sides of the guide material insertion hole 20, body screw holes 21 a and 21 b that penetrate in the X-axis direction for screwing the end cap 9 b, the lubricant container 10 b, and the side seal 11 b to the slider body 8 are provided. Is formed.

  In order to receive the induction material 14, an induction material accommodation portion 18 that is recessed according to the shape of the induction material 14 is formed on the surface of the body 12 and the legs 13 a and 13 b of the end cap 9 b on the slider body 8 side. ing.

  In the guide material accommodating portion 18, concave portions 19 a to 19 d into which the below-described convex portions 24 a to 24 d (see FIG. 4) formed on the guide material 14 are formed.

  FIG. 4 is a diagram illustrating the guide member 14 of the rolling bearing guide device 1 according to the first embodiment. (A) shows the surface by the side of the end cap 9b, (b) shows a side surface, (c) shows a lower surface, (d) has shown the expanded CC cross section in (a).

  As described above, the guide member 14 is formed of the trunk portion 22 and the leg portions 23a and 23b. The body portion 22 is formed in a rectangular plate shape, and body portion screw holes 25a and 25b penetrating in the X-axis direction are formed in the vicinity of both end portions. As can be seen from FIG. 2C, the leg portions 23a and 23b have a semi-cylindrical shape obtained by dividing the cylinder in half along the center line, and are formed so that the curved surface faces the end cap 9b side. ing. The leg portions 23a and 23b serve as return guides for changing the direction of the rolling elements.

  In the vicinity of both ends of the end cap 9b side surface of the body portion 22 of the guide member 14, convex portions 24a and 24b protruding in a columnar shape are formed. Further, convex portions 24c and 24d projecting in a columnar shape are formed at substantially the center of the end cap 9b side surface of the leg portions 23a and 23b of the guide member 14, respectively. The convex portions 24a to 24d are fitted into the concave portions 19a to 19d formed in the guide material accommodating portion 18 of the end cap 9b, respectively. Thereby, positioning of the induction | guidance | derivation material 14 becomes easy.

  A pair of oil supply material accommodation recesses 41a to 41d are provided on both sides of the protrusions 24c and 24d on the surface of the leg portions 23a and 23b of the guide member 14 on the end cap 9b side. The oil supply material accommodation recesses 41a to 41d are formed along the longitudinal direction of the leg portions 23a and 23b, and accommodate the oil supply materials 42a to 42d, respectively. Felt can be used as the material of the oil fillers 42a to 42d. Examples of the felt include wool, aramid fiber, glass fiber, cellulose fiber, nylon fiber, polyester fiber, polyether fiber, polyolefin fiber, and rayon fiber. It is preferable to set the felt porosity low so as to suppress the amount of lubricant released. Examples of polyolefin fibers include polyethylene fibers and polypropylene fibers. The oil fillers 42a to 42d are fixed to the recesses 41a to 41d by interference fitting. That is, in the state before the oil supply materials 42a to 42d are accommodated in the recesses 41a to 41d, the dimension in the Y-axis direction is set slightly larger than the interval in the Y-axis direction on the inner side surfaces of the recesses 41a to 41d.

  FIG. 5 is a diagram illustrating the lubricant container 10b of the rolling bearing guide device 1 according to the first embodiment. (A) shows the surface by the side seal 11b side, (b) has shown the oil-containing material 32 accommodated in the lubricant container 10b.

  The lubricant container 10b includes a body portion 26 extending in the Y-axis direction, and leg portions 27a and 27b protruding from both ends of the body portion 26 in one direction in the Z-axis direction. The lubricant container 10b has a box shape opened to the side seal 11b side, and an accommodating portion 28 for the oil-containing material 32 is formed on the side seal 11b side.

  Leg portions 27a and 27b of the lubricant container 10b are respectively formed with leg cylindrical portions 29a and 29b formed in a substantially cylindrical shape. The leg cylindrical portions 29a and 29b are for fixing the end cap 9b, the lubricant container 10b, and the side seal 11b to the slider body 8 through screws.

  An induction material insertion hole 31 through which the above-described induction material 37 passes is formed near the center of the body portion 26 of the lubricant container 10b. Also, body screw holes 30a and 30b penetrating in the X-axis direction are formed on the left and right sides of the guide material insertion hole 31 of the body portion 26 of the lubricant container 10b.

  As shown in FIG. 5B, the oil-impregnated material 32 has a trunk portion 33 and legs 34a and 34b so as to be accommodated in the accommodating portion 28 formed in the lubricant container 10b. Further, the leg portions 34a and 34b are provided with escape portions 35a and 35b at positions corresponding to the leg cylindrical portions 29a and 29b in order to avoid interference with the leg cylindrical portions 29a and 29b of the lubricant container 10b. Yes. Felt can be used for the oil-impregnated material 32 similarly to the oil supply materials 42a to 42b. Felts include wool, aramid fiber, glass fiber, cellulose fiber, nylon fiber, polyester fiber, polyether fiber, polyolefin fiber, rayon fiber, etc., and the porosity is set high to increase the retention of lubricant. ing. Examples of polyolefin fibers include polyethylene fibers and polypropylene fibers.

  In order to lubricate the rolling element 16 over a long period of time, the induction material 14 and the oil fillers 42a to 42d are damaged early due to repetitive stress generated when the rolling element 16 passes through the inducer 14 and the oil fillers 42a to 42d. Therefore, it is necessary to prevent the lubricant from being supplied to the rolling elements 16. Therefore, the guide material 14 and the oil supply materials 42a to 42d are preferably formed from polyethylene fibers.

  When the rolling element 16 moves from the rolling path to the direction changing paths 15a to 15d, or when the rolling element 16 moves from the return path to the direction changing paths 15a to 15d, the rolling element 16 may collide with the guide member 14. There is. Further, when the rolling element 16 passes through the oil fillers 42a to 42d, the surfaces of the oil fillers 42a to 42d may be worn. Therefore, a combination using polyethylene having impact resistance as the guide material 14 and polypropylene having abrasion resistance as the oil supply materials 42a to 42d is preferable. In addition, in order to stably supply the lubricant to the rolling elements 16, it is preferable that the fitting between the oil supply materials 42a to 42d and the guide material 14 is stable. Therefore, the induction | guidance | derivation material 14 and the oil supply materials 42a-42d may be a combination of polyethylenes having excellent dimensional stability.

  The body portion 33 of the oil-impregnated material 32 has a guide material insertion hole 38 for inserting the guide material 37 in a portion corresponding to the guide material insertion hole 31 formed in the lubricant container 10b. In addition, the body portion 33 of the oil-impregnated material 32 is formed with body portion screw holes 36 a and 36 b for allowing screws to pass through on both the left and right sides of the guide material insertion hole 38.

  According to the first embodiment configured as described above, the lubricant is smoothly guided from the lubricant containers 10a and 10b to the oil fillers 42a to 42d, and an appropriate amount of lubricant is transferred from the oil fillers 42a to 42d. It is supplied to the moving body 16. Further, since a relatively large amount of lubricant can be stored by the lubricant containers 10a and 10b, the linear motion guide device 1 can maintain a good lubrication state without replenishing the lubricant over a long period of time.

  Further, by arranging the oil fillers 42a to 42d in contact with the rolling elements 16 inside the direction change paths 15a and 15b, the rolling elements 16 are not subjected to the centrifugal force of the rolling elements 16 when the rolling elements 16 move at a high speed. Wear and breakage due to contact with can be suppressed.

(Second Embodiment)
A rolling bearing guide apparatus according to a second embodiment will be described with reference to FIG. The rolling bearing guide device according to the second embodiment is different from the first embodiment in that it does not have a lubricant container and the configuration of the guide material, and the other configurations are the same as those in the first embodiment. Omitted, the guide member and the means for supplying the lubricant to the guide member will be described.

  FIG. 6 is a view showing the end cap 209b and the guide members 223a and 223b of the rolling bearing guide device according to the second embodiment. (A) shows the surface on the slider body side, (b) shows the DD cross section in (a), (c) shows the surface on the end cap 209b side of the induction members 223a and 223b, (d) Shows an enlarged EE cross section in (c).

  In the second embodiment, the end cap 209b has the same shape as the end cap 9b according to the first embodiment, but the guide members 223a and 223b are the leg portions 23a of the guide member 14 according to the first embodiment. , 23b, and has only a portion corresponding to the body portion 22.

  As described above, since the rolling guide bearing device according to the second embodiment does not have a lubricant container, the lubricant is supplied to the induction members 223a and 223b as follows. That is, the lubricant is injected from the grease nipple 260 that is screwed into the female screw formed in the lubricant supply hole 220. A lubricant reservoir 218 is formed on the surface of the end cap 209b on the slider body side, and the injected lubricant is stored in the lubricant reservoir 218. Since the upper portions of the guide materials 223a and 223b are exposed in the lubricant reservoir 218, the stored lubricant is supplied from the upper portions of the guide materials 223a and 223b to the entire guide materials 223a and 223b. The lubricant reservoir 218 may be filled with an oil-containing material that is separate from the induction material. In that case, it is preferable that the oil-containing material has a lower density than the induction materials 223a and 223b. This is because the oil-containing material can be impregnated with a large amount of lubricant.

  As shown in FIG. 6 (c), on the end cap 209b side surface of the guide materials 223a and 223b, a pair of oil supply material accommodation recesses 241a on both the upper and lower sides sandwiching the projections 224c and 224d (224d is not shown). To 241d (241b and 241c are not shown). The oil supply material accommodation recesses 241a to 241d are formed along the longitudinal direction of the guide materials 223a and 223b, and each accommodates the oil supply materials 242a to 242d. As a material of the oil fillers 242a to 242d, felt can be used as in the first embodiment. Examples of the felt include wool, aramid fiber, glass fiber, cellulose fiber, nylon fiber, polyester fiber, polyether fiber, polyolefin fiber, and rayon fiber. It is preferable to set the porosity of the felt low to suppress the amount of lubricant released. Examples of polyolefin fibers include polyethylene fibers and polypropylene fibers.

  In order to lubricate the rolling elements 216 over a long period of time, the induction members 223a, 223b and the oil fillers 242a to 242d are caused by repeated stress generated when the rolling element 216 passes through the induction members 223a, 223b and the oil fillers 242a to 242d. Must be prevented from being damaged at an early stage, and the lubricant cannot be supplied to the rolling elements 216. Therefore, it is preferable to use polyethylene fibers for the guide materials 223a and 223b and the oil supply materials 242a to 242d.

  When the rolling element 216 moves from the rolling path to the direction changing paths 215a to 215d, or when the rolling element 216 moves from the return path to the direction changing paths 215a to 215d, the rolling element 216 collides with the guide materials 223a and 223b. There is a risk. Further, when the rolling elements 216 pass through the oil fillers 242a to 242d, the surfaces of the oil fillers 242a to 242b may be worn. Therefore, a combination using polyethylene having impact resistance as the guide materials 223a and 223b and polypropylene having wear resistance as the oil supply materials 242a to 242d is preferable. Further, in order to stably supply the lubricant to the rolling elements 216, it is preferable that the fitting between the oil supply materials 242a to 242d and the guide materials 223a and 223b is stable. Therefore, the guide materials 223a and 223b and the oil supply materials 242a to 242d may be a combination of polyethylenes having excellent dimensional stability.

  As can be seen from the EE cross section shown in FIG. 6D, the guide members 223a and 223b have a substantially trapezoidal cut surface perpendicular to the longitudinal direction, and the corner portions 240a on the side in contact with the rolling elements 216, 240b is rounded. The guide members 223a and 223b serve as return guides. In the case of a semi-cylindrical shape like the leg portions 23a and 23b of the induction member 14 according to the first embodiment, the contact between the rolling element and the induction material becomes point contact, and the amount of lubricant supplied to the rolling element is reduced. Can be reduced. On the other hand, when the shape is similar to that of the guide members 223a and 223b according to the second embodiment, the rolling element 216 rolls on the trapezoidal upper surface, and the distance between the rolling element and the guide member increases. The amount of lubricant supplied can be increased, and the effect of discharging foreign matter from the rolling path can also be obtained.

  According to the second embodiment, since an appropriate amount of lubricant can be supplied to the rolling elements while storing the lubricant, a good lubrication state can be maintained without replenishing the lubricant over a long period of time. it can. In the second embodiment, although the amount of lubricant that can be stored is smaller than that in the first embodiment, the absence of the lubricant container makes the number of parts smaller than that in the first embodiment, saves assembly work, and the slider. It is also possible to reduce the dimension in the moving direction.

(Third embodiment)
A rolling bearing guide apparatus according to a third embodiment will be described with reference to FIG. The rolling bearing guide device according to the third embodiment is different from the first embodiment in that a portion for storing the lubricant in the slider body is used instead of the lubricant container, and other configurations are the same as those in the first embodiment. Therefore, the description which overlaps is abbreviate | omitted and it demonstrates centering on the structure which stores a lubricant | lubricant in a slider main body instead of a lubricant container.

  FIG. 7 is a view showing the slider main body 308, the end cap 309a, and the guide member 314 of the rolling bearing guide device according to the third embodiment. (A) has shown the surface to which the end cap 309a is attached among the slider main bodies 308. FIG. (B) has shown the FF cross section in (a).

  The slider body 308 includes a body portion 350 formed in a plate shape extending in the X-axis direction and the Y-axis direction, and one end in the Z-axis direction over the entire length in the X-axis direction from both end portions extending in the X-axis direction of the body portion 350. It is comprised from the leg parts 351a and 351b which protruded.

  In the legs 351a and 351b, circulation paths 352a to 352d penetrating in the X-axis direction are formed to circulate the rolling elements. Between the circulation paths 352a and 352c and between the circulation paths 352b and 352d, screws for fixing the end cap 309a and the side seal 311a to the slider main body 308 are screwed together. Screw holes 357a and 357b are formed. In addition, rolling grooves 353a to 353d that extend in the X-axis direction and roll the rolling elements between the leg rails 351a and 351b and the guide rail 2 are formed on the surfaces where the leg portions 351a and 351b face each other.

  The body 350 of the slider main body 308 is formed with body screw holes 354a and 354b in which female screws are formed to screw the screws that fix the end cap 309a and the side seal 311a to the slider main body 308. Yes.

  Further, the body portion 350 is provided with a lubricant storage hole 355 that extends in the X-axis direction from the center of the end surface on the end cap 309a side of the body portion 350 and constitutes a lubricant storage portion. The lubricant storage hole 355 is filled with an oil-containing material 356.

  As shown in FIG. 7B, the oil-impregnated material 356 is in contact with the guide material 314, the lubricant impregnated in the oil-containing material 356 is supplied to the guide material 314, and the guide material 314 changes the direction of the lubricant. A lubricant is applied to the rolling elements that guide to the road and pass through the direction change path.

  According to the third embodiment, since an appropriate amount of lubricant can be supplied to the rolling elements while storing the lubricant, a good lubricating state can be maintained without replenishing the lubricant over a long period of time. it can. In the third embodiment, the amount of lubricant that can be stored is smaller than that in the first embodiment, but since there is no lubricant container, the number of parts is smaller than that in the first embodiment, the assembly work is saved, and the slider is omitted. It is also possible to reduce the dimension in the moving direction.

  As mentioned above, although specific embodiment was shown in order to demonstrate this invention, this invention is not limited to this, A various change and improvement can be added.

  For example, as for the cross-sectional shape of the portion of the guide material that contacts the rolling element, the cross-sectional shape of the leg portions 23a and 23b of the guide material 14 according to the first embodiment is adopted as the guide material 223a and 223b according to the second embodiment. Alternatively, on the contrary, the cross-sectional shape of the guide members 223a and 223b according to the second embodiment may be employed for the leg portions 23a and 23b of the guide member 14 according to the first embodiment.

  The lubricant container according to the first embodiment does not necessarily have to be provided on both the front and rear sides of the slider, and may be provided on only one of them, or may be arranged at a place other than the front and rear of the slider. Further, the lubricant container and the lubricant storage hole 355 according to the third embodiment may be used in combination.

  The lubricant reservoir holes according to the third embodiment may be arranged one by one corresponding to each of the induction materials arranged before and after the slider, but any one may be arranged, and in the X-axis direction The lubricant may be supplied to both of the guide members that are penetrated and arranged before and after the slider. The lubricant reservoir 218 of the linear motion guide device according to the second embodiment can be combined with the linear motion guide device according to the third embodiment.

  The lubricant supply mechanism of the present application is not limited to the case where two rows of rolling grooves are provided on both sides of the guide rail as in the above embodiment, but one having one row on each side and three or more rows on each side. Even can be applied.

  The shape of the guide material is not limited to that of the above embodiment, and any shape can be adopted as long as it is exposed in the direction change path and the lubricant is applied without inhibiting the rolling of the rolling elements. be able to.

  As described above, according to the present invention, it is possible to provide a rolling bearing guide device that makes it possible to lubricate rolling elements over a long period of time and reduce labor for maintenance.

DESCRIPTION OF SYMBOLS 1 Rolling bearing guide apparatus 2 Guide rail 3 Slider 4 Bolt hole 5a, 5b Corner part rolling groove 6a, 6b Side part rolling groove 7 Bolt 8,308 Slider main body 9a, 9b, 209b, 309a End cap 10a, 10b Lubricant Containers 11a, 11b, 311a Side seals 12, 312 Trunk portions 13a, 13b, 313a Leg portions 14, 314 Guiding materials 15a-15d, 215a-215d Direction change paths 16, 216 Rolling elements 17a, 17b, 217a, 217b Through-hole portions 18 Guide material accommodating portions 19a to 19d Recess 20 Guide material insertion holes 21a and 21b Body screw holes 22 Body portions 23a and 23b Leg portions 24a to 24d Projection portions 25a and 25b Body screw holes 26 Body portions 27a and 27b Legs Portion 28 accommodating portion 29a, 29b leg cylindrical portion 30a, 30b trunk screw hole 31 guide material insertion hole 32 Oil material 33 Body portions 34a, 34b Leg portions 35a, 35b Escape portions 36a, 36b Body screw holes 37 Guide material 38 Guide material insertion holes 41a-41d, 241a-241d Oil supply material receiving recesses 42a-42d, 242a-242d Oil supply material 220 Lubricant supply holes 223a, 223b Inductive members 240a, 240b Corner portions 350 Body portions 351a, 351b Leg portions 352a-352d Circulation paths 353a-353d Rolling grooves 354a, 354b Body screw holes 355 Lubricant storage holes 356 Oil-containing material 357a , 357b Leg screw hole

Claims (7)

A guide rail,
A slider body that slides on the guide rail;
A rolling element that rolls between the slider body and the guide rail as the slider body slides;
In a rolling bearing guide device having an end cap that is attached to an end face of the slider main body that is forward or backward during the sliding and that constitutes a direction changing path that changes a moving direction of the rolling element,
A lubricant reservoir for storing the lubricant;
A guide material that is disposed between the slider body and the end cap and constitutes a part of the direction change path, and guides the lubricant from the lubricant reservoir to the direction change path by capillary action;
An oil supply material that is held by the guide material, impregnated with the lubricant guided by the guide material, and in contact with the rolling element that passes through the direction change path, and supplies the lubricant to the rolling element. A rolling bearing guide device characterized by the above.   The rolling bearing guide device according to claim 1, further comprising a second guide member that guides the lubricant stored in the lubricant storage unit to the guide member by capillary action.   The rolling bearing guide device according to claim 1, wherein the lubricant reservoir is configured by a lubricant container provided adjacent to the end cap.   The rolling bearing guide device according to claim 1, wherein the lubricant reservoir is configured by a recess formed in the end cap.   The rolling bearing guide device according to claim 1, wherein the lubricant reservoir is configured by a hole formed in the slider body.   The guide member is disposed on both sides of the guide rail, constitutes a part of the direction changing path, and a pair of leg portions for holding the fuel supply material, and a body portion formed integrally with the pair of leg portions. The rolling bearing guide device according to claim 1, comprising:   The said guide material is arrange | positioned at the both sides of the said guide rail, comprises a part of said direction change path, and consists of a pair of leg part which hold | maintains the said oil supply material. The rolling bearing guide device according to one item.

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