JP2005172027A - Linear guide bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear guide bearing device having improved operability by simplifying the work of fitting a first return guide to a second return guide for more efficient assembling work and consequently for lower manufacturing cost and a less number of steps in a roller raceway groove in a direction changing path. <P>SOLUTION: An end cap 50 to be fixed to the end face of a slider body 2A has an end cap body 50a, the first return guide 60 fitted into the end cap body 50a at the side facing the end face of the slider body 2A in the axial direction, and the second return guide 70 fitted into the first return guide 60 in the axial direction. The first return guide 60 and the second return guide 70 are arranged approximately perpendicular to each other into an approximately rectangular shape with the roller raceway groove 6a on a short side in view from the axial direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a linear motion guide bearing device used in an industrial machine field such as a machine tool or an injection molding machine.

As a conventional linear guide bearing device of this type, for example, the one shown in FIG. 29 is known. This linear motion guide bearing device includes a guide rail 1 extending in the axial direction and a slider 2 straddling the guide rail 1 so as to be relatively movable in the axial direction.
On both side surfaces of the guide rail 1 in the width direction, rolling element rolling grooves 3 extending in the axial direction are formed in two rows on the upper and lower sides, for a total of four rows. On the inner surface of the portion 4, rolling element rolling grooves 5 that face the rolling element rolling grooves 3 are formed in two rows on one side, a total of four rows.

A large number of cylindrical rollers 6 as rolling elements are movably loaded between the rolling grooves 3 and 5 of the rolling elements, and the slider 2 pivots on the guide rail 1 through the rolling of these cylindrical rollers 6. Relative movement along the direction is possible.
Along with this movement, the cylindrical roller 6 interposed between the guide rail 1 and the slider 2 rolls and moves to the end of the slider 2 in the axial direction, but the slider 2 continues to move in the axial direction. Needs to circulate these cylindrical rollers 6 indefinitely.

  For this reason, holes 7 penetrating in the axial direction in both sleeve portions 4 of the slider body 2A are formed in two places on the upper and lower sides, for a total of four places, and the inside of the holes 7 is a passage (rolling element passage) 8a of the cylindrical roller 6. A pair of end caps 9 as rolling element circulation parts are fixed to both ends of the slider body 2A in the axial direction via screws or the like, and both the rolling elements are attached to the end cap 9. An infinite circulation track of the cylindrical roller 6 is formed by forming a direction changing path 10 (see FIG. 30) curved in an arc shape that communicates between the rolling grooves 3 and 5 and the rolling element passage 8a.

As shown in FIG. 30, the end cap 9 includes an end cap body 9a, and a first return guide 30 and a second return guide that are fitted in the axial direction on the side of the end cap 9 facing the end surface of the slider body 2A. 40.
Both the first return guide 30 and the second return guide 40 are plate-like members having substantially the same outer shape, and unevenness for forming the direction change path 10 on parallel joint surfaces and outer surfaces facing each other. A plurality of holes are provided. The joint surfaces of the first return guide 30 and the second return guide 40 are concavo-convexly fitted so that the outer shapes substantially coincide, and in this state, the first return guide 30 side is axially connected to the end cap body 9a. (See, for example, Patent Document 1).

In this example, the first return guide 30, the second return guide 40, and the end cap body 9a communicate the upper rolling element passage 8a with the lower rolling element rolling grooves 3 and 5. The direction change path 10 which forms the change path 10, and connects between the lower rolling element passage 8a and the upper rolling element rolling grooves 3 and 5 by the first return guide 30 and the second return guide 40. Is forming.
By the way, since many cylindrical rollers 6 that circulate infinitely rotate in the same direction around the roller axis, when the cylindrical rollers 6 that are adjacent to each other come into contact with each other, the roller speed directions of the contact portions are opposite to each other, The force generated thereby prevents the cylindrical roller 6 from rolling smoothly.

In addition, the use of the cylindrical roller 6 as the rolling element increases the rigidity and load capacity as compared with the case of using a ball, but on the other hand, the cylindrical roller 6 during running causes a so-called skew, resulting in improved operability. It becomes a factor to worsen.
Under such circumstances, conventionally, by interposing the separator 20 between the cylindrical rollers 6 adjacent to each other, direct contact between the cylindrical rollers is prevented and the skew is suppressed. In addition to smooth running, the noise during running is reduced.

  As shown in FIGS. 31 to 33, the separator 20 is disposed so as to sandwich the separator main body 21 interposed between the cylindrical rollers 6 adjacent to each other, and both end surfaces in the axial direction of the cylindrical rollers 6. The main body 21 and the arm part 22 provided integrally are provided, and the concave curved surface 21a according to the outer peripheral shape of this cylindrical roller 6 is formed in the part facing the outer peripheral surface of the cylindrical roller 6 of the separator main body 21. Yes. In FIG. 29, reference numeral 23 denotes a separator guide member disposed between the outer side surface of the guide rail 1 and the inner side surface of the slider 2.

When the cylindrical roller 6 circulates between the rolling element rolling grooves 3 and 5, the direction changing path 10 and the rolling element passage 8a, the arm portion 22 of the separator 20 is connected to the separator guide member 23 and the rolling element. It is guided along the circulation direction of the cylindrical roller 6 by guide grooves 24 provided in the passage 8a and the direction changing path 10, respectively.
JP 2002-54633 A

  However, in the above-described conventional linear motion guide bearing device, the first return guide 30 and the second return guide 40 are both plate-like members having complicated outer shapes and substantially the same shape, and facing each other in parallel joints. Since a plurality of irregularities and holes for forming the direction change path 10 are provided on the surface and the outer surface, the shape is complicated and high molding accuracy is required, as well as the first return guide 30 and the second Since the operation of fitting the concave and convex portions so that the outer shapes substantially coincide with each other on the return guide 40 is troublesome, the efficiency of the assembly work is poor and the manufacturing cost is high.

Further, since the end cap main body 9a, the first return guide 30 and the second return guide 40 have a structure which is divided substantially parallel to each other, a divided surface which crosses the roller raceway groove of the direction change path 10 in the roller axial direction. (2 locations on the dividing surface between the first return guide 30 and the second return guide 40, 1 location on the dividing surface between the first return guide 30 and the end cap body 9a, a total of 3 locations) As a result, the number of steps at the joining portion of the split surfaces increases, and the guide accuracy of the cylindrical roller 6 deteriorates, which may adversely affect the operability.
The present invention has been made in order to eliminate such inconveniences. The fitting work between the first return guide and the second return guide is simplified to improve the efficiency of the assembling work, and the manufacturing cost is low. An object of the present invention is to provide a linear motion guide bearing device that can improve the operability by reducing the number of steps of the roller raceway grooves on the direction change path.

In order to achieve the above object, the invention according to claim 1 is directed to a guide rail having rolling element rolling grooves extending in the axial direction on both sides, and a rolling element rolling member facing the rolling element rolling grooves of the guide rail. A slider having a moving groove and straddling the guide rail so as to be relatively movable along the axial direction through rolling of a large number of rollers as rolling elements inserted between the rolling grooves of both the rolling elements. And
The slider has a slider body having a rolling element passage penetrating in the axial direction, and a curved direction changing path that communicates between the rolling element rolling grooves and the rolling element passage. A pair of end caps fixed to both end faces of the direction,
In the linear guide bearing device in which the rolling element rolling grooves are arranged in a total of four rows in two rows on one side and a total of four rolling element passages in two on the one side.
The end cap is fitted into the end cap body, a first return guide fitted in the axial direction on the side of the end cap body facing the end surface of the slider body, and fitted in the first return guide in the axial direction. A second return guide,
The first return guide and the second return guide are arranged in a substantially rectangular shape in which a raceway groove of the roller is provided on the short side when viewed from the axial direction, and are arranged substantially orthogonal to each other. A direction changing path for communicating between the upper rolling element passage and the lower rolling element rolling grooves by the guide and the end cap body, and the lower rolling element path and the upper rolling element rolling. One of the direction change paths communicating with the grooves is formed, and the other direction change path is formed by the second return guide, the end cap body, and the first return guide. It is characterized by doing.

According to a second aspect of the present invention, in the first aspect, the first return guide is provided with a roller raceway groove on the inner peripheral side of the direction change path formed by the first return guide and the end cap body. A roller raceway groove on the outer periphery side of the direction changing path is provided in the end cap body,
A roller raceway groove on the inner peripheral side of the direction change path formed by the second return guide, the end cap body and the first return guide is provided in the second return guide, and the direction change path A roller raceway groove on the outer peripheral side is provided in the end cap body and the first return guide.

The invention according to claim 3 is the separator body according to claim 1 or 2, wherein the separator body is disposed so as to face at least one end face in the axial direction of the separator body interposed between the rollers adjacent to each other. And a separator having an arm portion provided integrally with
A guide groove for guiding the arm portion of the separator along the circulation direction of the roller when the roller circulates between the rolling element rolling grooves, the direction changing path and the rolling element passage; The end cap body, the first return guide, and the second return guide are provided with support walls that form a part of the guide groove.

According to a fourth aspect of the present invention, in the third aspect, the inner peripheral support wall of the guide groove provided in the direction change path formed by the first return guide and the end cap main body is provided on the first return guide. Provided on the return guide, and provided with an outer peripheral support wall of the guide groove on the end cap body,
An inner peripheral support wall of the guide groove provided in the direction change path formed by the second return guide, the end cap body and the first return guide is provided in the second return guide, An outer peripheral support wall of a guide groove is provided in the end cap body and the first return guide.

According to a fifth aspect of the present invention, in the fourth aspect, the bottom surface of the guide groove provided in the direction changing path formed by the first return guide and the end cap body is provided on the end cap body side. ,
A split surface between the first return guide and the end cap body is formed by extending a roller axial direction surface of the inner circumferential roller raceway groove on the first return guide side or a guide groove on the first return guide side. The inner peripheral support wall surface of the roller is an extension surface in the roller axial direction.

According to a sixth aspect of the present invention, in the fourth aspect, the bottom surface of the guide groove provided in the direction changing path formed by the first return guide and the end cap body is formed on the first return guide side. Provided in
A dividing surface between the first return guide and the end cap body is defined by a roller axially extending surface of the roller raceway groove on the outer peripheral side on the end cap body side or an outer peripheral support wall surface of the guide groove on the end cap body side. It is characterized by having a roller axially extending surface.

According to a seventh aspect of the present invention, in the fifth or sixth aspect, the split surface of the end cap body and the first return guide is a positioning surface and / or locking of the first return guide with respect to the end cap body. It is characterized by having a surface.
The invention according to claim 8 is provided in the direction change path formed by the second return guide, the end cap body, and the first return guide according to any one of claims 3 to 7. The bottom surface of the guide groove is provided on the end cap body side and the first return guide side,
A split surface between the second return guide and the first return guide is defined by a roller axial extension surface of the inner circumferential roller raceway groove on the second return guide side or the second return guide side. A roller axially extending surface of an inner peripheral supporting wall surface of the guide groove is characterized in that

The invention according to claim 9 is provided in the direction change path formed by the second return guide, the end cap body, and the first return guide according to any one of claims 3 to 7. The bottom surface of the guide groove is provided on the second return guide side,
A split surface between the second return guide and the first return guide is defined as a roller axial extension surface of the roller raceway groove on the outer peripheral side of the first return guide or the guide groove of the first return guide. The outer circumferential support wall surface of the roller is an axially extended surface.
The invention according to claim 10 is the invention according to claim 8 or 9, wherein the split surface of the second return guide and the first return guide is divided into a positioning surface of the second return guide with respect to the first return guide, and It is characterized by having a locking surface.

  According to the present invention, the first return guide and the second return guide are arranged substantially orthogonal to each other in a substantially rectangular shape in which the raceway groove of the roller is provided on the short side when viewed from the axial direction of the slider body. Therefore, the shape of the first return guide and the second return guide can be simplified to avoid the requirement for high molding accuracy, and the axial direction of the first return guide and the second return guide can be avoided. This makes it possible to easily perform the fitting operation, thereby making it possible to improve the efficiency of the assembling operation and hence to reduce the manufacturing cost.

In addition, a roller raceway groove on the inner periphery side of the direction change path formed by the first return guide and the end cap body is provided in the first return guide, and a roller raceway groove on the outer periphery side of the direction change path is provided. A roller raceway groove on the inner peripheral side of the direction change path formed by the second return guide, the end cap body, and the first return guide is provided in the second return guide, By providing a roller raceway groove on the outer peripheral side of the conversion path in the end cap main body and the first return guide, the outer peripheral side of the direction change path formed by the second return guide, the end cap main body and the first return guide. Since the roller raceway groove can be formed with only two split surfaces that cross in the roller axial direction, the number of steps at the junction of the split surfaces is lower than in the conventional case. It decreased Te, as a result, it is possible to improve the operability by improving guidance accuracy of the roller.
Further, when a separator is interposed between the rollers adjacent to each other, the guide groove for guiding the arm portion of the separator in the direction of circulation in the direction change path is also joined to the divided surface as in the case of the roller raceway groove. Since the number of steps at the portion can be reduced, the guide accuracy of the arm portion of the separator can be improved and the operability can be improved.

Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram for explaining a main part of a linear guide bearing device which is an example of an embodiment of the present invention, FIG. 2 is an explanatory diagram of an internal structure viewed from the direction of arrow A in FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is a cross-sectional view taken along line BB in FIG. 3, and FIG. 6 is a first return guide. FIG. 7 is a right side view of FIG. 6, FIG. 8 is a cross-sectional view taken along line AA of FIG. 6, and FIG. 9 is a second return guide. FIG. 10 is a right side view of FIG. 9, FIG. 11 is a bottom view of FIG. 9, FIG. 12 is an end cap body, and a first return guide. And FIG. 13 is a cross-sectional view showing the internal structure seen from the direction of arrow A in FIG. 12, and FIG. 14 is a cross-sectional view showing the fitting structure of the second return guide. FIG. 15 shows a state before the first return guide and the second return guide are fitted together, FIG. 15 shows a state where the first return guide and the second return guide are fitted, and FIG. 15 is a view seen from the direction of arrow A, FIG. 17 is a view showing a state in which the first return guide is fitted to the end cap body in a state where the second return guide is fitted to the first return guide, and FIG. FIG. 19 to FIG. 28 are sectional views for explaining the division position of the first return guide and the second return guide and the division position of the first return guide and the end cap body. FIGS. It is sectional drawing which shows the modification of the fitting structure of this return guide and a 2nd return guide.

In this embodiment, the same basic structure as that of the conventional linear motion guide bearing device already described with reference to FIG. 29 is taken as an example, and overlapping portions are denoted by the same reference numerals in the respective drawings. Is omitted.
As shown in FIGS. 1 and 2, a linear guide bearing device that is an example of an embodiment of the present invention includes an end cap 50 fixed to an end surface of a slider body 2 </ b> A, an end cap body 50 a, and the end cap. A first return guide 60 fitted in the axial direction on the side of the main body 50a facing the end surface of the slider main body 2A, and a second return guide 70 fitted in the first return guide 60 in the axial direction are provided. The first return guide 60 and the second return guide 70 have a substantially rectangular shape in which the inner circumferential side raceway groove 6a of the cylindrical roller 6 is provided on the short side when viewed from the axial direction, and are substantially orthogonal to each other. Has been placed.

  In this embodiment, the first return guide 60 and the end cap body 50a provide a direction change path 10a that communicates between the upper rolling element passage 8a and the lower rolling element rolling grooves 3 and 5. The direction change path 10b formed and communicated between the lower rolling element passage 8a and the upper rolling element rolling grooves 3 and 5 by the second return guide 70, the first return guide 60 and the end cap body 50a. Is forming.

As shown in FIGS. 6 to 8, the first return guide 60 has a substantially U shape, and its both ends in the circumferential direction are opposed to each other in the longitudinal direction when viewed from the axial direction of the slider body 2 </ b> A. An inner peripheral roller raceway groove 6a of the direction change path 10a is formed along the outer peripheral surface of the letter shape, and an outer peripheral side roller raceway groove 6b (see FIG. 8) of the direction change path 10b is formed at the bottom on the inner peripheral surface side. A part thereof is formed so as to be substantially orthogonal to the inner circumferential side roller raceway groove 6a.
And the bottom part of the outer peripheral surface side of the 1st return guide 60 is fitted by the fitting recessed part 51 formed in the end cap main body 50a in the axial direction.

As shown in FIGS. 3 to 5, the fitting recess 51 is recessed in a substantially U shape on the surface facing the end surface side of the slider body 2 </ b> A of the end cap body 50 a corresponding to the shape of the first return guide 60. The outer peripheral side roller raceway groove 6b of the direction changing path 10a is formed along the U-shaped bottom surface of the fitting recess 51.
By the outer peripheral side roller raceway groove 6b of the fitting recess 51 and the inner peripheral side roller raceway groove 6a of the first return guide 60, between the upper rolling element passage 8a and the lower rolling element rolling grooves 3 and 5, respectively. The direction change path 10a which connects is formed.

Further, a U-shaped recess 52 shallower than the fitting recess 51 is formed in the end cap body 50a so as to be substantially orthogonal to the fitting recess 51, and the direction changing path 10b is formed at the bottom of the U-shaped recess 52. The outer peripheral roller raceway groove 6b of the first return guide 60 is flush with the outer peripheral side roller raceway groove 6b of the direction change path 10b partially formed at the bottom of the inner peripheral surface side of the first return guide 60 described above. Is formed.
As shown in FIGS. 9 to 10, the second return guide 70 has a substantially arc shape in which the axial dimension of the slider main body 2A is shorter than that of the first return guide 60, and both ends in the circumferential direction of the slider main body 2A. The inner circumferential roller raceway grooves 6a of the direction change path 10b are formed along the arc-shaped outer circumferential surface so as to face each other in the longitudinal direction when viewed from the axial direction.

  Then, the bottom of the second return guide 70 on the outer peripheral surface side is in the axial direction so that the longitudinal direction is substantially perpendicular to the longitudinal direction of the first return guide 60 and the longitudinal direction thereof is on the inner peripheral side of the first return guide 60. In this fitted state, the outer peripheral side roller raceway groove 6a formed on the inner circumference side roller raceway groove 6a on the outer circumference side of the second return guide 70 and the bottom of the U-shaped recess 52 of the end cap body 50a. 6b and an outer peripheral roller raceway groove 6b partially formed on the inner peripheral surface side bottom of the first return guide 60, the lower rolling element passage 8a and the upper rolling element rolling grooves 3, 5 The direction change path 10b that communicates with each other is formed so as to cross the direction change path 10a.

Here, in this embodiment, it is partially formed on the outer peripheral side roller raceway groove 6b formed on the bottom of the U-shaped recess 52 of the end cap body 50a and on the inner peripheral surface side of the first return guide 60. Two split surfaces 55 that cross the outer roller raceway groove 6b in the roller axial direction are formed at the connecting portion with the outer roller raceway groove 6b.
The end cap main body 50a, the first return guide 60, and the second return guide 70 are fitted with the first return guide 60, the second return guide 70, and the like, as shown in FIGS. After fitting, the first return guide 60 may be fitted into the fitting recess 51 of the end cap body 50a, or the first return guide 60 may be fitted into the fitting recess 51 of the end cap body 50a. After that, the second return guide 70 may be fitted to the first return guide 60.

Next, the guide groove 24 of the arm part 22 of the separator 20 provided in the direction change paths 10a and 10b will be described.
On the both sides in the roller axial direction of the inner peripheral roller raceway groove 6a provided on the outer peripheral side of the first return guide 60, the inner peripheral support wall 24a of the guide groove 24 provided in the direction change path 10a is the first return guide. 60 is formed along the U-shaped outer peripheral surface of the outer peripheral side roller raceway groove 6b provided on the inner peripheral bottom portion of the first return guide 60, and is provided in the direction change path 10b on both sides in the roller axial direction. An outer peripheral support wall 24b of the guide groove 24 is formed, and guide grooves 24 provided in the direction change path 10b are provided on both sides in the roller axial direction of the inner peripheral roller raceway groove 6a provided on the outer peripheral side of the second return guide 70. The inner peripheral support wall 24 a is formed along the arc-shaped outer peripheral surface of the second return guide 70.

  In addition, on the both sides in the roller axial direction of the outer peripheral roller raceway groove 6b provided in the fitting recess 51 of the end cap body 50a, the outer peripheral support walls 24b of the guide grooves 24 provided in the direction changing path 10a are provided on the fitting recess 51. On the both sides in the roller axial direction of the outer peripheral roller raceway groove 6b formed along the U shape and provided in the U-shaped recess 52 of the end cap body 50a, the outer peripheral support wall of the guide groove 24 provided in the direction change path 10b. 24 b is formed so as to be flush with the outer peripheral support wall 24 b provided at the inner peripheral bottom of the first return guide 60. Accordingly, the guide groove 24 also has a connection portion between the outer peripheral support wall 24b provided in the U-shaped recess 52 of the end cap body 50a and the outer peripheral support wall 24b provided on the inner peripheral bottom of the first return guide 60. , Two split surfaces 55 are formed.

  In this embodiment, as shown in FIG. 12, the bottom surface 24c of the guide groove 24 provided in the direction changing path 10a is provided in the end cap body 50a, and the first return guide 60, the end cap body 50a, 12 is defined as a roller axial direction extending surface 80 (see FIG. 18) of the inner circumferential roller raceway groove 6a of the first return guide 60, and the vertical direction of the first return guide 60 of FIG. 12 with respect to the end cap body 50a. The positioning surface and the locking surface of the inner peripheral side roller raceway groove 6a are the roller axial direction extension surfaces 80, and the left and right positioning surfaces and the locking surface of the first return guide 60 in FIG. The side surface 81 of the return guide 60 (see FIG. 18) or the outer surface 82 of the inner peripheral support wall 24a of the guide groove 24 formed along the U-shaped outer peripheral surface of the first return guide 60 (see FIG. It is a 18 reference).

  Further, as shown in FIG. 13, the bottom surface 24c of the guide groove 24 provided in the direction changing path 10b is provided in the bottom portion on the inner peripheral side of the first return guide 60 and the U-shaped recess 52 of the end cap body 50a, and the first The dividing surface of the second return guide 70 and the first return guide 60 is a roller axial direction extending surface 80 (see FIG. 18) of the inner peripheral side roller raceway groove 6a of the second return guide 70, and A vertical positioning surface and a locking surface of the return guide 70 of the second return guide 70 with respect to the first return guide 60 serve as a roller axial direction extension surface 80 of the inner peripheral side roller raceway groove 6a, and the second return guide of FIG. The guide groove 2 formed along the side surface 81 (see FIG. 18) of the second return guide 70 or the arcuate outer peripheral surface of the second return guide 70 with the positioning surface and the locking surface in the left-right direction of 70. Have an outer surface 82 of the inner peripheral support wall 24a (see FIG. 18) of the.

  As is apparent from the above description, in this embodiment, the first return guide 60 fitted in the fitting recess 51 of the end cap body 50a in the axial direction and the first return guide 60 in the axial direction. Since the second return guide 70 fitted to each other has a substantially rectangular shape in which the roller raceway groove 6a is provided on the short side when viewed in the axial direction of the slider body 2A, The shape of the first return guide 60 and the second return guide 70 is simplified to avoid the need for high molding accuracy, and the first return guide 60 and the second return guide 70 are fitted in the axial direction. Thus, the assembly work can be made more efficient, and the manufacturing cost can be reduced.

Further, two split surfaces 55 are formed in the roller raceway groove 6b on the outer peripheral side of the direction changing path 10b formed by the second return guide 70, the end cap body 50a, and the first return guide 60. Therefore, the number of steps at the joint portion of the dividing surface 55 is reduced as compared with the conventional one. As a result, the roller guiding accuracy is improved and the operability can be improved.
Further, with respect to the guide groove 24 that guides the arm portion 22 of the separator 20 in the circulation direction by the direction change path 10b, the number of steps at the joining portion of the dividing surface 55 can be reduced as in the case of the roller raceway groove 6b. Therefore, the guide accuracy of the arm portion 22 of the separator 20 can be improved, and the operability can be improved.
The linear guide bearing device of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.

  For example, in the above-described embodiment, the direction change path 10a that communicates between the upper rolling element passage 8a and the lower rolling element rolling grooves 3 and 5 by the first return guide 60 and the end cap body 50a. The direction change path 10b formed and communicated between the lower rolling element passage 8a and the upper rolling element rolling grooves 3 and 5 by the second return guide 70, the first return guide 60 and the end cap body 50a. However, instead of this, the lower rolling element passage 8a and the upper rolling element rolling grooves 3 and 5 are separated by the first return guide 60 and the end cap body 50a. Direction change path 10b is formed, and the upper rolling element passage 8a and the lower rolling element rolling grooves 3, 5 are formed by the second return guide 70, the first return guide 60 and the end cap body 50a. Preparative may be formed to the direction changing passage 10a communicating.

In the above embodiment, the case where all the inner peripheral roller raceway grooves 6a that form the direction change path 10a are provided on the outer peripheral side of the first return guide 60 is taken as an example. For example, as shown in FIG. 19, a part of the inner peripheral roller raceway groove 6 a that forms the direction change path 10 a may be provided in the second return guide 70.
Hereinafter, modified examples of the fitting structure of the end cap body 50a, the first return guide, and the second return guide will be described with reference to FIGS.

  FIG. 20 shows a modification of the fitting structure between the end cap body 50a and the first return guide 60. In this example, the bottom surface 24c of the guide groove 24 provided in the direction change path 10a is used as the end cap body. 50a, and a split surface between the first return guide 60 and the end cap body 50a is provided on the first return guide 60 in the roller axial direction extending surface 83 of the inner peripheral support wall 24a of the guide groove 24 (FIG. 18). 20), the vertical positioning surface and the locking surface of the first return guide 60 in FIG. 20 with respect to the end cap body 50a are used as the roller axial direction extension surface 83 of the inner peripheral support wall 24a, and in FIG. A lateral positioning surface and a locking surface of one return guide 60 are used as a side surface 81 (see FIG. 18) of the first return guide 60.

  FIG. 21 shows a modified example of the fitting structure of the first return guide 60 and the second return guide 70. In this example, the bottom surface 24c of the guide groove 24 provided in the direction changing path 10b is shown in FIG. The first return guide 60 is provided at the bottom on the inner peripheral side and the U-shaped recess 52 of the end cap body 50 a, and the second return guide 70 and the first return guide 60 are divided by the second return guide 70. A roller axially extending surface 83 (see FIG. 18) of the inner peripheral support wall 24a of the guide groove 24 provided in the upper and lower positioning surfaces and the engagement with respect to the first return guide 60 of the second return guide 70 of FIG. The stop surface is a roller axial direction extension surface 83 of the inner peripheral support wall 24a, and the lateral positioning surface and the locking surface of the second return guide 70 in FIG. 21 are the side surfaces of the second return guide 70. Is set to 1 (see FIG. 18). FIG. 22 is an example in which a part of the inner peripheral side roller raceway groove 6a that forms the direction change path 10a is provided in the second return guide 70.

  FIG. 23 shows a modification of the fitting structure between the end cap body 50a and the first return guide 60. In this example, the bottom surface 24c of the guide groove 24 provided in the direction changing path 10a is formed on the first bottom guide 24c. In addition to being provided in the return guide 60, a roller axial direction extension surface 84 of the outer peripheral support wall 24b of the guide groove 24 provided with a split surface between the first return guide 60 and the end cap body 50a in the fitting recess 51 of the end cap body 50a. (See FIG. 18), and the positioning surface and the engaging surface in the vertical direction with respect to the end cap body 50a of the first return guide 60 of FIG. 23 are the roller axial direction extending surfaces 84 of the outer peripheral support wall 24b of the guide groove 24. In addition, the lateral positioning surface and the locking surface of the first return guide 60 in FIG. 23 are used as the side surface 81 of the first return guide 60 (see FIG. 18).

  FIG. 24 shows a modified example of the fitting structure of the first return guide 60 and the second return guide 70. In this example, the bottom surface 24c of the guide groove 24 provided in the direction changing path 10b is shown in FIG. 2 is provided on the return guide 70, and a split surface between the second return guide 70 and the first return guide 60 is provided on the first return guide 60. 84 (see FIG. 18), and the vertical positioning surface and the locking surface of the second return guide 70 of FIG. 24 with respect to the first return guide 60 are used as the roller axial direction extension surface 84 of the outer peripheral support wall 24b. The lateral positioning surface and the locking surface of the second return guide 70 in FIG. 24 are the side surfaces 81 (see FIG. 18) of the second return guide 70. FIG. 25 is an example in which a part of the inner peripheral side roller raceway groove 6 a that forms the direction change path 10 a is provided in the second return guide 70.

  FIG. 26 shows a modification of the fitting structure between the end cap body 50a and the first return guide 60. In this example, the bottom surface 24c of the guide groove 24 provided in the direction changing path 10a is formed on the first bottom guide 24c. In addition to being provided in the return guide 60, a roller axial direction extension surface 85 (see FIG. 5) of the outer peripheral side roller raceway groove 6b in which a split surface between the first return guide 60 and the end cap body 50a is provided in the fitting recess 51 of the end cap body 50a. 18), the vertical positioning surface and the locking surface of the first return guide 60 of FIG. 26 with respect to the end cap body 50a are the roller axial direction extension surfaces 85 of the outer peripheral roller raceway grooves 6b, and FIG. The lateral positioning surface and the locking surface of the first return guide 60 are used as the side surface 81 (see FIG. 18) of the first return guide 60 or the end cap body 50. Outer surface 85 of the outer peripheral support wall 24b of the guide groove 24 provided in the fitting recess 51 is set to (see FIG. 18).

  FIG. 27 shows a modified example of the fitting structure of the first return guide 60 and the second return guide 70. In this example, the bottom surface 24c of the guide groove 24 provided in the direction change path 10b is shown in FIG. 2 is provided in the second return guide 70, and a split surface between the second return guide 70 and the first return guide 60 is provided as a roller axial direction extension surface 85 of the outer peripheral roller raceway groove 6b of the first return guide 60 (FIG. 18). 27), the vertical positioning surface and the locking surface of the second return guide 70 of FIG. 27 with respect to the first return guide 60 are used as the roller axial direction extension surface 85 of the outer peripheral roller raceway groove 6b. The guide groove formed in the side surface 81 (see FIG. 18) of the second return guide 70 or the first return guide 60 is used as a positioning surface and a locking surface in the left-right direction of the second return guide 70. Have an outer surface 86 (see FIG. 18) of the fourth outer circumferential support wall 24b. FIG. 28 is an example in which a part of the inner peripheral side roller raceway groove 6a that forms the direction changing path 10a is provided in the second return guide 70.

It is explanatory drawing for demonstrating the principal part of the linear guide bearing apparatus which is an example of embodiment of this invention. It is explanatory drawing of the internal structure seen from the arrow A direction of FIG. It is a figure which shows the surface which faces the end surface side of the slider main body of an end cap main body. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is the BB sectional view taken on the line of FIG. It is the figure which looked at the 1st return guide in the axial direction (fitting direction) from the end face side of the slider body. FIG. 7 is a right side view of FIG. 6. It is the sectional view on the AA line of FIG. It is the figure which looked at the 2nd return guide from the end surface side of the slider main body to the axial direction (fitting direction). FIG. 10 is a right side view of FIG. 9. FIG. 10 is a bottom view of FIG. 9. It is sectional drawing which shows the fitting structure of an end cap main body, a 1st return guide, and a 2nd return guide. It is sectional drawing which shows the internal structure seen from the arrow A direction of FIG. It is a figure which shows the state before the fitting of a 1st return guide and a 2nd return guide. It is a figure which shows the state by which the 1st return guide and the 2nd return guide were fitted. It is the figure seen from the arrow A direction of FIG. It is a figure which shows the state which fitted the 1st return guide to the end cap main body in the state which fitted the 2nd return guide to the 1st return guide. It is sectional drawing for demonstrating the division | segmentation position of a 1st return guide and a 2nd return guide, and the division | segmentation position of a 1st return guide and an end cap main body. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is sectional drawing which shows the modification of the fitting structure of an end cap main body and a 1st return guide. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is sectional drawing which shows the modification of the fitting structure of an end cap main body and a 1st return guide. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is sectional drawing which shows the modification of the fitting structure of an end cap main body and a 1st return guide. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is sectional drawing which shows the modification of the fitting structure of a 1st return guide and a 2nd return guide. It is the figure which fractured | ruptured a part which shows an example of the conventional linear guide bearing apparatus. It is a disassembled perspective view for demonstrating the structure of the conventional end cap. It is the figure seen from the circulation direction of a separator. It is the figure seen from the arrow A direction of FIG. It is the figure seen from the arrow B direction of FIG.

Explanation of symbols

1 Guide rail 2 Slider 2A Slider body 3 Rolling element rolling groove (guide rail side)
5 Rolling element rolling groove (slider side)
6 Cylindrical roller 6a Inner circumference roller raceway groove 6b Outer circumference side roller raceway groove 8a Rolling element passages 10a, 10b Direction change path 20 Separator 21 Separator body 22 Arm portion 24 Guide groove 24a Guide groove inner circumference support wall 24b Guide groove outer circumference Support wall 24c Guide groove bottom surface 50 End cap 50a End cap main body 60 First return guide 70 Second return guide 80 Roller axial extension surface 83 of the inner circumferential roller raceway groove Roller shaft of the inner circumferential support wall surface of the guide groove Direction extension surface 84 Roller axis direction extension surface 85 of the outer peripheral support wall surface of the guide groove Roller axis direction extension surface of the outer side roller raceway groove

Claims (10)

A guide rail having axially extending rolling element rolling grooves on both sides, and a rolling element rolling groove facing the rolling element rolling groove of the guide rail, and between the rolling element rolling grooves. A slider straddling the guide rail so as to be relatively movable along the axial direction through rolling of a large number of rollers as inserted rolling elements,
The slider has a slider body having a rolling element passage penetrating in the axial direction, and a curved direction changing path that communicates between the rolling element rolling grooves and the rolling element passage. A pair of end caps fixed to both end faces of the direction,
In the linear guide bearing device in which the rolling element rolling grooves are arranged in a total of four rows in two rows on one side and a total of four rolling element passages in two on the one side.
The end cap includes an end cap body, a first return guide fitted in the axial direction on the side of the end cap body facing the end face of the slider body, and a second return guide fitted in the first return guide in the axial direction. With a return guide,
The first return guide and the second return guide are arranged in a substantially rectangular shape in which a raceway groove of the roller is provided on the short side when viewed from the axial direction, and are arranged substantially orthogonal to each other. A direction changing path for communicating between the upper rolling element passage and the lower rolling element rolling grooves by the guide and the end cap body, and the lower rolling element path and the upper rolling element rolling. One of the direction change paths communicating with the grooves is formed, and the other direction change path is formed by the second return guide, the end cap body, and the first return guide. A linear motion guide bearing device comprising: A roller raceway groove on the inner peripheral side of the direction changing path formed by the first return guide and the end cap body is provided in the first return guide, and a roller raceway groove on the outer peripheral side of the direction change path. Is provided on the end cap body,
A roller raceway groove on the inner peripheral side of the direction change path formed by the second return guide, the end cap body and the first return guide is provided in the second return guide, and the direction change path The linear guide bearing device according to claim 1, wherein a roller raceway groove on an outer peripheral side is provided in the end cap body and the first return guide. A separator body interposed between the rollers adjacent to each other, and a separator having an arm portion disposed so as to face at least one end face in the axial direction of the rollers and provided integrally with the separator body,
A guide groove for guiding the arm portion of the separator along the circulation direction of the roller when the roller circulates between the rolling element rolling grooves, the direction changing path and the rolling element passage; The linear guide bearing device according to claim 1, wherein a support wall that forms a part of the guide groove is provided in an end cap body, the first return guide, and the second return guide. . An inner peripheral support wall of the guide groove provided in the direction change path formed by the first return guide and the end cap body is provided in the first return guide, and an outer peripheral support wall of the guide groove. Is provided on the end cap body,
An inner peripheral support wall of the guide groove provided in the direction change path formed by the second return guide, the end cap body and the first return guide is provided in the second return guide, 4. The linear guide bearing device according to claim 3, wherein an outer peripheral support wall of a guide groove is provided in the end cap body and the first return guide. A bottom surface of the guide groove provided in the direction change path formed by the first return guide and the end cap body is provided on the end cap body side;
A split surface between the first return guide and the end cap body is formed by extending a roller axial direction surface of the inner circumferential roller raceway groove on the first return guide side or a guide groove on the first return guide side. The linear motion guide bearing device according to claim 4, wherein the inner peripheral support wall surface is a roller axially extending surface. A bottom surface of the guide groove provided in the direction change path formed by the first return guide and the end cap body is provided on the first return guide side;
A dividing surface between the first return guide and the end cap body is defined by a roller axially extending surface of the roller raceway groove on the outer peripheral side on the end cap body side or an outer peripheral support wall surface of the guide groove on the end cap body side. The linear motion guide bearing device according to claim 4, wherein the roller axial extension surface is provided.   The division surface of the end cap body and the first return guide is a positioning surface and / or a locking surface of the first return guide with respect to the end cap body. Linear motion guide bearing device. The bottom surface of the guide groove provided in the direction change path formed by the second return guide, the end cap body, and the first return guide is formed on the end cap body side and the first return guide side. Provided,
A split surface between the second return guide and the first return guide is defined by a roller axial extension surface of the inner circumferential roller raceway groove on the second return guide side or the second return guide side. The linear motion guide bearing device according to any one of claims 3 to 7, wherein the guide groove is an extension surface in the roller axial direction of an inner peripheral support wall surface of the guide groove. A bottom surface of the guide groove provided in the direction change path formed by the second return guide, the end cap body and the first return guide is provided on the second return guide side;
A split surface between the second return guide and the first return guide is defined as a roller axial extension surface of the roller raceway groove on the outer peripheral side of the first return guide or the guide groove of the first return guide. The linear guide bearing device according to any one of claims 3 to 7, characterized in that the outer peripheral support wall surface is a roller axial direction extending surface.   9. The dividing surface of the second return guide and the first return guide is a positioning surface and / or a locking surface of the second return guide with respect to the first return guide. Or the linear guide bearing apparatus described in 9.

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