JP2015110972A - Roller bearing guiding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller bearing guiding device which securely supplies lubricant to a rolling element by the contact of a lubrication member with the rolling element, and prevents damage of the lubrication member contacting with the rolling element.SOLUTION: A roller bearing guiding device includes a guide rail (2), a slider (3) sliding on the guide rail (2), a plurality of rolling elements (35) rolling between the guide rail (2) and the slider (3) and circulating in the slider (3), and a rotation body (25a) provided in the slider (3) and supplying lubricant to the rolling element (35) by contacting with the rolling element (35).

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 slide. End caps are provided at both ends, sometimes leading or trailing, and a plurality 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 attached in any direction, in the present application, as shown in FIG. 1, the extending direction of the guide rail 2 of the linear motion guide device 1 is set to the X axis direction and the X axis direction. The direction parallel to the surface of the guide rail 2 in contact with the mounted portion is the Y-axis direction, and the direction perpendicular to both the X-axis direction and the Y-axis direction is the Z-axis direction.

  The curved motion guide device has the same configuration as the linear motion guide device described above, but the guide rail has a curved shape such as a ring shape, and the slider slides in a curved manner.

  In such a rolling bearing guide device, by providing a lubricating member with a lubricated surface exposed in the direction change path of the end cap, the rolling element that contacts the rolling element passing through the direction change path is surely supplied with the lubricant. Some of them are supplied (for example, Patent Document 1 and Patent Document 2).

JP 2009-63059 A JP 2009-68611 A

  However, in any invention according to any of the patent documents, there is a problem in durability such that the lubricating member that contacts the rolling element is deformed or lost due to the contact of the rolling element.

  In view of such a problem, the present invention provides a rolling bearing guide device that prevents damage to a lubricating member in contact with the rolling element while the lubricant is in contact with the rolling element and reliably supplies the lubricant to the rolling element. The purpose is to provide.

In order to solve the above problems, in the present invention,
A guide rail,
A slider that slides on the guide rail;
A plurality of rolling elements that roll between the guide rail and the slider and circulate in the slider;
There is provided a rolling bearing guide device comprising: a rotating body provided on the slider and supplying a lubricant to the rolling element while rotating by contact with the rolling element.

Preferably, the slider has a direction changing path for changing a moving direction of the rolling element,
A part of the rotating body is exposed in the direction change path.

  In addition, preferably, it further includes an impregnation member provided on the slider and impregnated with the lubricant, and a part of the rotating body is in contact with the impregnation member. Alternatively, it has a lubricant supply means for supplying a lubricant to the rotating body.

  Preferably, the slider further includes a cover that covers the impregnation member.

  Preferably, the rotating body is made of a porous molded body.

  Preferably, the rotating body is supported by the slider so as to be rotatable and has a columnar rotation shaft serving as a rotation center, and the rotation shaft and the center line in common, and is integrally formed around the rotation shaft, It consists of an annular part in contact with the impregnation member and the rolling element.

Preferably, the rotating body is supported by the slider so as to be rotatable and has a columnar rotation shaft serving as a rotation center, and the rotation shaft and the center line in common, and is integrally formed around the rotation shaft, Consisting of an annular part in contact with the impregnating member and the rolling element,
The rotating shaft is rotatably supported by the cover,
The annular portion is in contact with the impregnating member and the rolling element.

  ADVANTAGE OF THE INVENTION According to this invention, the rolling bearing guide apparatus which prevents damage to the lubricating member which contacts a rolling element can be provided, supplying a lubricant to a rolling element reliably because a lubricating member contacts a rolling element.

It is a perspective view which shows the rolling bearing guide apparatus which concerns on embodiment of this application. It is a figure which shows the end cap of the rolling bearing guide apparatus which concerns on embodiment of this application. (A) shows the side surface of the end cap, (b) shows the surface of the end cap on the slider body side, and (c) shows the surface of the end cap on the side opposite to the slider body side. It is a figure which shows the lubricating member of the rolling bearing guide apparatus which concerns on embodiment of this application. (A) shows the side surface of the lubricating member, (b) shows the surface of the lubricating member on the slider body side, and (c) shows the surface of the lubricating member on the side opposite to the slider body. It is a side view which shows the assembly method of the side seal of the rolling bearing guide apparatus which concerns on embodiment of this application, a lubricating member, an end cap, and a slider main body. It is an enlarged view which shows the rotary body periphery seen from the slider main body side of the rolling bearing guide apparatus which concerns on embodiment of this application. It is AA sectional drawing shown to FIG. 2, 3, 5 of the rolling bearing guide apparatus which concerns on embodiment of this application. (A) shows the assembled state, and (b) shows the state before assembly. It is a figure which shows the rotary body which concerns on the modification of the rolling bearing guide apparatus which concerns on embodiment of this application. (A) shows the rotating body according to the first modification, (b) shows the rotating body according to the second modification, and (c) shows the rotating body according to the third modification.

  A rolling bearing guide device 1 according to an embodiment of the present application will be described with reference to FIGS. 1 to 6. FIG. 1 is a perspective view showing a rolling bearing guide device 1 according to a first embodiment of the present application.

  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 at equal intervals in the X-axis direction. 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 and 5b and side rolling grooves 6a and 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 an arbitrary attached portion (not shown) by a bolt 7 that passes through the bolt hole 4.

  The slider 3 includes a 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 a lubricant container 10a attached to the slider main body 8 via the end caps 9a and 9b. 10b, and side seals 11a and 11b attached to the slider body 8 via end caps 9a and 9b and lubricant containers 10a and 10b.

  Each of the side seals 11 a and 11 b is formed of an elastic body and has a lip portion that is in sliding contact with the guide rail 2, and prevents foreign matter from entering between the slider 3 and the guide rail 2. Through holes 12a and 12b (12b not shown) are formed in the side seals 11a and 11b, and the user can inject the lubricant into the lubricant containers 10a and 10b through the through holes 12a and 12b.

  FIG. 2 is a view showing the end cap 9a of the rolling bearing guide device 1 according to the embodiment of the present application. (A) shows the side surface of the end cap 9a, (b) shows the surface of the end cap on the slider body 8 side, and (c) shows the surface of the end cap on the side opposite to the slider body 8 side. Although description of the end cap 9b is omitted, the end cap 9b has the same configuration as the end cap 9a.

  The end cap 9a is disposed between the body part 13 extending in the Y-axis direction, the leg parts 14a and 14b extending from both ends of the body part 13 toward the guide rail 2 in the Z-axis direction, and the end cap 9a and the slider body 8. Return guide 33 (see FIG. 6). Direction change paths 15a and 15c for changing the advancing direction of the rolling element 35 (see FIG. 6) are formed in the slider body 8 side portion at the boundary between the body portion 13 and the leg portions 14a and 14b. Similarly, direction change paths 15b and 15d for changing the traveling direction of the rolling element 35 are formed at the tip of the leg portions 14a and 14b and on the slider main body 8 side.

  The direction change paths 15a to 15d are curved in an arc shape so that the rolling elements 35 rolling in the X-axis direction can change the traveling direction by 180 degrees. Each of the direction change paths 15a to 15d has a substantially circular cross section cut perpendicularly to the traveling direction of the rolling elements 35 rolling inside thereof. The return guide 33 is common to the direction change paths 15a and 15b and common to the direction change paths 15c and 15d, and constitutes the inner peripheral surface of the direction change paths 15a to 15d on the slider body 8 side. (See FIG. 6). The inner peripheral surface of the direction change paths 15a to 15d opposite to the slider body 8 is formed in a groove shape in the body 13 and the legs 14a and 14b, and the direction change paths 15a to 15a in FIG. 15d shows a portion formed in the groove shape.

  End cap fixing holes 16a and 16b penetrating in the X-axis direction are formed in the body portion 13 of the end cap 9a in order to fix the end cap 9a to the slider body 8 with screws.

  Side seal fixing hole forming members 17a and 17b penetrating in the X-axis direction are formed on the leg portions 14a and 14b of the end cap 9a in order to fix the side seal 11a to the slider body 8 with screws. The side seal fixing hole forming members 17a and 17b protrude in a cylindrical shape toward the slider body 8, and are configured to be fitted with holes formed in the slider body 8 at predetermined positions. The positioning of the end cap 9a is facilitated.

  Openings 18a, 18b, 18c, and 18d are formed on the side surfaces of the direction change paths 15a to 15d opposite to the slider body 8.

  FIG. 3 is a diagram illustrating the lubricating member 10a of the rolling bearing guide device 1 according to the embodiment of the present application. (A) shows the side surface of the lubricating member 10a, (b) shows the surface of the lubricating member 10a on the slider main body 8 side, and (c) shows the surface of the lubricating member 10a on the opposite side to the slider main body 8. .

  The lubricating member 10a includes a body portion 19 extending in the Y-axis direction and leg portions 20a and 20b extending from both ends of the body portion 19 toward the guide rail 2 in the Z-axis direction. The lubricant 10a is composed of an impregnated member 21 made of a porous molded body, and its surface is covered with an oil resistant lubricant container 22 except for the surface opposite to the slider body 8. . The impregnated member 21 is impregnated with a lubricant. As the porous molded body, a porous polymer material such as elastomer, rubber or plastic is used.

  A lubricant supply hole 23 penetrating in the X-axis direction is formed near the center of the body portion 19 of the lubricating member 10a.

  Side seal through holes 24a and 24b penetrating in the X-axis direction are formed in the leg portions 20a and 20b of the lubricating member 10a, respectively. The side seal through-holes 24a and 24b are integrally formed with the lubricant container 22 and protrude in a cylindrical shape from the portion constituting the surface of the lubricant container 22 on the slider body 8 side toward the side opposite to the slider body 8. It is formed as a part.

  Rotating bodies 25a, 25b, 25c, and 25d are attached to positions on the slider body 8 side of the lubricant container 22 at positions corresponding to the openings 18a to 18d formed in the end cap 9a.

  FIG. 4 is a side view showing a method of assembling the side seal 11a, the lubricating member 10a, the end cap 9a, and the slider body 8 of the rolling bearing guide device 1 according to the embodiment of the present application. Hereinafter, although the assembling method on the side seal 11a side will be described, the same process can be performed when the side seal 11b side is assembled.

  In the assembly, first, the end cap 9a is disposed at a predetermined position of the slider main body 8, and the screw 26 for fixing the end cap is screwed into a screw hole (not shown) formed in the slider main body 8. The end cap 9a is fixed to. The vicinity of the opening end of the screw hole formed in the slider body 8 is expanded in diameter so that side seal fixing hole forming members 17a and 17b protruding in a cylindrical shape are fitted. Therefore, the end cap 9a can be easily positioned.

  Next, the lubricating member 10a and the side seal 11a are arranged so as to overlap the end cap 9a, and the side seal fixing screw 27 is screwed into a screw hole formed in the slider body 8, thereby lubricating the side seal 11a and the side seal 11a. The member 10a is fixed to the slider body 8 through the end cap 9a. The surface on the side seal 11a side of the lubricating member 10a is not covered with the lubricant container 22 as described above, but is covered with the side seal 11a.

  FIG. 5 is an enlarged view showing the periphery of the rotating body 25a as seen from the slider body 8 side of the rolling bearing guide device 1 according to the embodiment of the present application. Hereinafter, the rotating body 25a will be described, but the rotating bodies 25b, 25c, and 25d have the same configuration as the rotating body 25a.

  As shown in FIG. 5, the rotating body 25 a includes a columnar rotating shaft 28, and an annular portion 29 formed around the rotating shaft 28 with the rotating shaft 28 having a common center line. The rotating shaft 28 and the annular portion 29 are integrally formed of a porous molded body. As the porous molded body, a porous polymer material such as elastomer, rubber or plastic is used.

  The annular portion 29 of the rotating body 25a is fitted into a through groove 30 formed in a portion of the lubricant container 22 that covers the surface of the lubricant member 10a on the slider body 8 side so as to face the opening 18a in a rectangular shape. It is. The rotating shaft 28 of the rotating body 25a is fitted in a bottomed groove 31 extending from the longitudinal center of the through groove 30 to both sides in the short direction so as to be rotatable without a gap. By setting it as a groove | channel with a bottom, it can receive the impact by a contact with the rolling element 35. FIG. The rotary shaft 28 and the bottomed groove 31 may be an interference fit.

  FIG. 6 is a cross-sectional view of the rotary body 25a of the rolling bearing guide device 1 according to the embodiment of the present application, taken along line AA shown in FIGS. In the figure, the rotating body 25a is a plane. (A) shows the state which combined the end cap 9a and the lubricating member 10a, (b) shows the state before combining the end cap 9a and the lubricating member 10a.

  As shown in FIG. 6A, the rotating body 25a protrudes on both sides of the lubricant container 22, contacts one side of the impregnation member 21 of the lubricating member 10a, and changes direction from the opening 18a on the other side. It is slightly exposed into the path 15a. Thereby, the rotating body 25a rotates by contacting the rolling element 35 passing through the direction changing path 15a while receiving the supply of the lubricant from the impregnating member 21, and applies the lubricant to the rolling element 35. As a result, the portion that supplies the lubricant by touching the rolling element 35 reduces the impact received from the rolling element 35, and the portion that supplies the lubricant is damaged by not concentrating the position where the impact is received at one point. Can be prevented. Further, since the rotating bodies 25a to 25d are formed independently from other members, they can be easily replaced even if they are damaged. Furthermore, since the lubricant is directly supplied to the rolling elements 35, an appropriate amount of lubricant can be reliably supplied without loss, the lubricant can be supplied over a long period of time, and the frequency of lubricant supply can be kept low.

  As shown in FIG. 6B, the rotating body 25a is formed separately from the lubricant container 22, but is attached to the lubricant container 22 before the end cap 9a and the lubricating member 10a are combined. Thereby, the rotating body 25a can be easily attached, and positioning of the lubricating member 10a is also facilitated. A concave portion 32 for accommodating the rotating body 25a is formed in the portion of the impregnating agent 21 corresponding to the rotating body 25a.

  FIG. 7 is a diagram illustrating a rotating body according to a modification of the rolling bearing guide device 1 according to the embodiment of the present application. (A) shows the rotator 125 according to the first modification, (b) shows the rotator 225 according to the second modification, and (c) shows the rotator 325 according to the third modification. The first to third modifications are different from the above-described embodiment in the configuration of the rotating body.

  In the rotating body 125 according to the first modification shown in FIG. 7A, among the members formed by the rotating shaft 128 and the annular portion 129, as in the rotating bodies 25a to 25d according to the above-described embodiment, A felt 134 is wound around the surface of the ring portion 129. Thereby, the frequency of replacement of the rotating body 125 due to wear can be reduced. As the felt 134, wool fabrics such as wool, aramid fiber, glass fiber, cellulose fiber, nylon fiber, polyester fiber, polyether fiber, polyolefin fiber, rayon fiber and the like can be used.

  The rotating body 225 according to the third modified example shown in FIG. 7B has a rotating shaft 228 similar to the rotating bodies 25a to 25d according to the above-described embodiment, but the annular portion 29 is a spherical portion 229. It is different in point. Thereby, the contact area of a rolling element and the spherical part 229 can be made small, the supply amount of a lubricant can be reduced, and the supply frequency of a lubricant can be lowered. Note that the felt 134 according to the first modification may be wound around the spherical portion 229 of the rotating body 225 according to the second modification.

  The rotating body 325 according to the second modified example shown in FIG. 7C includes the rotating shaft 328 and the annular portion 329 as in the rotating bodies 25a to 25d according to the above-described embodiment. The difference is that the outer peripheral surface of the ring portion 329 is constricted in accordance with the curvature of the rolling element. Thereby, the contact area of a rolling element and the annular ring part 329 can be enlarged, and the application quantity of a lubricant can be increased. Note that the felt 134 according to the first modification may be wound around the annular portion 329 of the rotating body 325 according to the third modification.

  When the rotating body according to the first to third modifications is used, particularly when the rotating body according to the second modification is used, the rotating body formed in the lubricant container is matched to the shape of the rotating body. The shape and size of the opening portion of the direction change path formed in the mounting portion or the end cap are changed.

  As described above, specific embodiments have been described for the purpose of describing the present invention. However, the present invention is not limited thereto, and various modifications and improvements can be made.

  For example, the rotating body is not limited to the above-described one, and any rotating means that receives the supply of the lubricant while applying the lubricant to the rolling element by rotating when the rotating body comes into contact with the rolling element may be used. In addition, it is not necessary to use one type of rotating body in one rolling bearing guide device, and it is possible to use a plurality of types of rotating bodies, and it is not necessary to provide rotating bodies on all direction change paths. It can also be used with the supply means.

  In addition, the basic configuration of the rolling bearing guide device is not limited to that shown in the present application. For example, a rolling bearing guide device in which one row of rolling elements is arranged on both sides, or a rolling element in which three rows of rolling elements are arranged on both sides. It can also be used for bearing guide devices.

  As described above, according to the present invention, the rolling bearing guide device prevents damage to the portion of the lubricating member that comes into contact with the rolling element while reliably supplying the lubricant to the rolling element when the lubricating member comes into contact with the rolling element. Can be provided.

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 Slider main body 9a, 9b End cap 10a, 10b Lubrication member 11a, 11b Side seal 12a 12b Through-hole 13 Body 14a, 14b Leg 15a, 15b, 15c, 15d Direction changing path 16a, 16b End cap fixing hole 17a, 17b Side seal fixing hole forming member 18a, 18b, 18c, 18d Opening 19 Body portion 20a, 20b Leg portion 21 Impregnation member 22 Lubricant container 23 Lubricant supply hole 24a, 24b Through hole portions 25a, 25b, 25c, 25d, 125, 225, 325 for side seal Rotating body 26 End cap fixing screw 27 Side seal fixing screws 28, 128, 228, 328 Rotating shafts 29, 12 9, 329 Annular part 229 Spherical part 30 Through groove 31 Bottomed groove 32 Recess 33 Return guide 35 Rolling element 134 Felt

Claims (7)

A guide rail,
A slider that slides on the guide rail;
A plurality of rolling elements that roll between the guide rail and the slider and circulate in the slider;
A rolling bearing guide device comprising: a rotating body provided on the slider and supplying a lubricant to the rolling element while rotating by contact with the rolling element. The slider has a direction changing path for changing the moving direction of the rolling element,
The rolling bearing guide device according to claim 1, wherein a part of the rotating body is exposed in the direction change path. And an impregnation member provided on the slider and impregnated with the lubricant,
The rolling bearing guide device according to claim 1, wherein a part of the rotating body is in contact with the impregnation member.   The rolling bearing guide device according to claim 3, wherein the slider further includes a cover that covers the impregnation member.   The rolling bearing guide device according to claim 1, wherein the rotating body is made of a porous molded body.   The rotating body is rotatably supported by the slider and has a columnar rotation shaft serving as a rotation center, and the rotation shaft and the center line are shared, and are integrally formed around the rotation shaft. The rolling bearing guide device according to any one of claims 1 to 5, wherein the rolling bearing guide device includes an annular portion that is in contact with the rolling element. The rotating body is rotatably supported by the slider and has a columnar rotation shaft serving as a rotation center, and the rotation shaft and the center line are shared, and are integrally formed around the rotation shaft. Consisting of an annular part in contact with the rolling element,
The rotating shaft is rotatably supported by the cover,
The rolling bearing guide device according to claim 4, wherein the annular portion is in contact with the impregnation member and the rolling element.

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