JP2004052978A - Linear guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear guide device capable of maintaining excellent performance for a long period by simplifying an assembling work, shortening assembling time and preventing positional deviation of a roller. <P>SOLUTION: Positioning shoulder parts 17 are provided on both side parts of a slider 11 to position a roller unit 33 at a prescribed position for a roller orbit surface 12a of a guide rail 12 by being engaged to a part of a roller shaft 13a. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a linear guide device used as guide means for a movable body that operates in a linear direction, for example, in a semiconductor-related device or an optical fiber manufacturing device, and in particular, a linear guide device having roller track surfaces on both side surfaces of a guide rail. Regarding improvement.
[0002]
[Prior art]
Conventionally, this type of linear guide device includes a slider and a guide rail for guiding the slider, and a plurality of rollers are mounted on the slider via respective roller support shafts. These rollers are for movably supporting the slider with respect to the guide rail. When the slider relatively moves in the longitudinal direction of the guide rail, the slider rolls on roller raceway surfaces formed on both side surfaces of the guide rail. It has become.
[0003]
In such a linear guide device, a method of using an eccentric bolt or an eccentric shaft for fine adjustment of the gap or preload amount between the outer peripheral surface of the roller and the roller raceway surface, that is, the position of the roller in the direction of contact or separation with the roller raceway surface. Are disclosed in Japanese Patent Application Laid-Open No. 2-113114 and Japanese Utility Model Application Laid-Open No. 63-152919.
[0004]
[Problems to be solved by the invention]
However, in the linear guide device disclosed in Japanese Patent Application Laid-Open No. 2-113114 or Japanese Utility Model Application Laid-Open No. 63-152919, the contact position of the roller with respect to the roller track surface is adjusted using an eccentric bolt or an eccentric shaft. Therefore, when the number of rollers to be installed is increased to increase the load capacity of the linear guide device, it takes time to adjust the contact position of the roller, and as a result, the linear guide device can be easily and quickly reduced. Was difficult to assemble.
[0005]
In the linear guide device disclosed in the above publication, the roller support shaft is rotated with respect to the slider to adjust the contact position of the roller, so that the roller support shaft has a clearance fit with the slider. For this reason, even when the contact position is adjusted to the optimum contact position during the assembling, the contact position may be shifted during use, and as a result, the running accuracy of the slider and the rigidity may be reduced.
[0006]
Therefore, an object of the present invention is to solve the above-mentioned problems, to simplify the assembling work, to shorten the assembling time, and to prevent the roller from being displaced, thereby maintaining good performance for a long period of time. It is intended to provide a linear guide device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a guide rail having roller track surfaces on both side surfaces, and a slider having a plurality of roller units arranged on both sides of the guide rail. In a linear guide device composed of a cylindrical roller body that comes into contact with a roller track surface and a roller shaft that rotatably supports the roller body, a part of the roller shaft is engaged with both sides of the slider. And a positioning shoulder for positioning a contact position of the roller main body with respect to the roller raceway surface.
[0008]
According to such a configuration, the dimensional management of each part is performed, and a configuration is made such that a predetermined gap is formed, thereby making it possible to omit the adjustment work at the time of assembling, simplifying the assembling work of the linear guide device and assembling. Time can be reduced.
In this case, a part of the roller shaft that engages with the positioning shoulder can be a spacer or a step portion of the roller shaft, as in the second and third aspects of the invention. Further, a roller unit having a configuration in which the roller main body is supported on the roller shaft via the rolling element and the inner ring can be used. Further, a roller unit in which the inner race is integrally formed as a part of the roller shaft can be used. Further, by adopting a configuration in which the positioning shoulder and the roller mounting seat surface formed on the slider are simultaneously processed, the processing time is shortened and the processing is performed with high precision. be able to. Further, by adopting a configuration in which the positioning shoulder engages with the spacer or the step on the opposite side of the roller raceway surface as in the inventions of claims 7 and 8, the displacement of the roller is prevented, and the long-term operation is achieved. And good performance can be maintained over a long period of time.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 are views showing a first embodiment of the present invention. FIG. 1 is a cross-sectional view of a linear guide device according to the first embodiment of the present invention, and FIG. 2 is a linear guide according to the first embodiment. FIG. 3 is a side view of the apparatus, and FIG. 3 is a sectional view taken along the line III-III in FIG. As shown in these figures, a linear guide device 10 according to a first embodiment of the present invention includes a guide rail 12 having roller track surfaces 12a, 12a on both side surfaces, and sleeve portions 11a on both sides of the guide rail 12. , 11a, and roller mounting seat surfaces 11b, 11b are formed on the inner surface of the sleeve of the slider 11. The roller mounting seat surface 11b is formed on the inner surface of the sleeve portion 11a so as to intersect the roller raceway surface 12a of the guide rail 12 at a substantially right angle, and a plurality of roller units 13 are provided on each roller mounting seat surface 11b. It is mounted by a roller mounting nut 19.
[0010]
As shown in FIG. 4, the roller unit 13 has a roller shaft 13a, and a cylindrical roller body 13d supported by the roller shaft 13a via an inner ring 13b and a plurality of rolling elements 13c. When the roller 11 moves relatively in the longitudinal direction of the guide rail 12, the roller body 13d rolls on the roller track surface 12a of the guide rail 12. The roller unit 13 has a cylindrical spacer 13e for fixing the inner race 13b to the end of the roller shaft 13a. On both sides of the slider 11, the roller unit 13 is engaged with the spacer 13e to guide the roller unit 13 to the guide rail. A positioning shoulder 17 (see FIGS. 1 and 3) for positioning the roller at a predetermined position with respect to the roller raceway surface 12a is provided. The positioning shoulder 17 is formed by processing the roller mounting seat surface 11b of the slider 11 at the same time, and is engaged with the spacer 13e on the opposite side of the roller raceway surface 12a.
[0011]
FIG. 5 is a diagram for explaining a method of assembling the linear guide device 10. When assembling the linear guide device 10 as described above, first, between the opposite side surfaces of the roller unit 13, that is, the roller track surface 12a Several kinds of dimensions C1 (or C2) between the and the positioning shoulder 17 are arranged at a certain dimension interval. At this time, the measurement side (surface) of the roller outer ring (roller main body 13d) is pressed in the direction of the central axis, and the dimensions are taken in a state where the gap is eliminated. The dimension is adjusted by manufacturing the outer diameter of the roller body 13d at the interval. A predetermined dimension A is determined between the dimension A between the positioning shoulders 17 used for mounting the two diagonally located roller units 13 and the dimension B between the roller raceway surfaces 12a, 12a on which the roller unit 13 rolls. Since the dimensions C1 and C2 (where C1 = C2) of the roller unit 13 necessary for setting the gap are derived, a predetermined gap can be set by combining rollers of the dimensions.
[0012]
Next, a method for measuring the dimensions A and B will be described with reference to FIG. As shown in the figure, the dimension A is measured using the parallel pins 23 and 23 having the diameter D1. Then, the dimension A is geometrically obtained by the following equation.
A = D1 + (A1 + D1) × sin45 ° − (A2 + A3)
Here, as shown in FIG. 7, the dimensions A2 and A3 are determined by simultaneously grinding the roller mounting seat surface 11b and the positioning shoulder 17 of the slider 11 with the grinding machine 24, as shown in FIG. , Stable dimensions can be obtained. Also, as shown in FIG. 8, the dimension B1 can be geometrically obtained by measuring the dimension B1 using the parallel pins 24, 24 having a diameter D2, as shown in FIG.
[0013]
B = (B1−D2) × sin45 ° −D2
As shown in FIG. 7, the processing of the slider 11 is a simple tool path only for reciprocating in the direction perpendicular to the paper surface except for the cutting, so that the processing error can be reduced. For this reason, the parallelism between the shoulders is high, and if the dimensions of the roller to be used in the first row are determined, the same gap is set by using the same size in the second and subsequent rows, thereby improving the load capacity. Even if the number of roller units 13 to be mounted is increased in order to make the adjustment, the adjustment time does not increase at an accelerating time, such as when determining the contact position of the roller by adjustment.
[0014]
As described above, the positioning shoulders 17 that engage with the spacers 13e of the roller unit 13 and position the roller unit 13 at a predetermined position with respect to the roller raceway surface 12a of the guide rail 12 are provided on both sides of the slider 11. The roller unit 13 is positioned at a predetermined position with respect to the roller raceway surface 11a. Therefore, the dimensional control of each part is performed, and the adjustment work at the time of assembling can be omitted by configuring the parts with a combination of dimensions so as to form a predetermined gap, thereby simplifying the assembling work of the linear guide device and shortening the assembling time. Can be achieved. In processing a slider, the same dimensions can be obtained by arranging and processing a plurality of sliders. If the dimensions of one roller are determined, the other dimensions are determined, which is more effective in mass production.
[0015]
9 to 12 are views showing a second embodiment of the present invention, and FIG. 9 is a partial cross-sectional front view of a linear guide device according to a second embodiment of the present invention. As shown in the figure, a linear guide device 30 according to a second embodiment of the present invention includes a guide rail 32 and a slider 31 relatively moving in the longitudinal direction of the guide rail 32. Roller mounting seat surfaces 31b, 31b are formed on both sides of the lower surface. These roller mounting seat surfaces 31b are formed on the lower surface of the slider 12 so as to intersect the roller track surface 32a of the guide rail 32 at substantially right angles. A plurality of roller units 33 are mounted on each roller mounting seat surface 31b. It is attached by a nut 34.
[0016]
The roller unit 33 has a roller shaft 33a, and a cylindrical roller body 33d supported by the roller shaft 33a via an inner ring 33b and a plurality of rolling elements 33c. The roller body 33d rolls on the roller raceway surface 32a of the guide rail 32 when the relative movement is made.
The roller shaft 33a of each roller unit 33 has a step 33e, and the roller unit 33 is positioned at a predetermined position with respect to the roller track surface 32a on both sides of the slider 11 by engaging with the step 33e. A positioning shoulder 37 is provided. The positioning shoulder portion 37 is formed by processing the roller mounting seat surface 31b of the slider 31 at the same time, and is engaged with the step portion 33e on the side opposite to the roller raceway surface 32a. In this embodiment, the roller track surface 32a of the guide rail 32 is formed by fitting a guide rod 36 having a circular cross section into a track groove 35 formed on both side surfaces of the guide rail 32 in this embodiment.
[0017]
FIGS. 10 to 12 are views for explaining a method of assembling the linear guide device 30. As in the first embodiment, the dimension E between the positioning shoulders 37 provided on the slider 31 and Based on the dimension F between the guide rods 36, 36 attached to both side surfaces of the guide rail 32 (see FIG. 11), the roller unit 33 is selected so as to have a predetermined gap and assembled to the slider 31. In this case, the gap is made a slight minus gap (−2 to −20 μm) in order to eliminate backlash, and a preload is applied.
[0018]
As shown in FIG. 12, the dimension of the roller unit 33 is controlled by measuring the dimension G using a pin 38 having the same diameter as the guide rod 36 of the guide rail 32, and subtracting the diameter of the guide rod 36 from the numerical value. Do.
As described above, when the positioning shoulders 37 for engaging the step 33e of the roller unit 33 and positioning the roller unit 33 at a predetermined position with respect to the roller raceway surface 32a are provided on both sides of the slider 31, the first As in the embodiment, the assembling work of the linear guide device can be simplified and the assembling time can be shortened.
[0019]
Note that the present invention is not limited to the above embodiment. For example, in the first embodiment described above, the roller shaft 13a of the roller unit 13 and the spacer 13e have a separate structure. However, as shown in FIG. 13, the roller shaft 13a of the roller unit 13 and the spacer 13e are integrally formed. It may be.
[0020]
【The invention's effect】
As described above, according to the present invention, the dimensional control of the components is performed, and the components having the dimensions such that a predetermined gap is formed are combined, so that the gap does not need to be adjusted at the time of assembly. The assembly work can be simplified and the assembly time can be shortened. Further, since the displacement of the rollers is prevented, it is possible to provide a linear guide device capable of maintaining good performance for a long period of time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a linear guide device according to a first embodiment of the present invention.
FIG. 2 is a side view of the linear guide device shown in FIG.
FIG. 3 is a sectional view taken along the line III-III in FIG. 2;
FIG. 4 is a cross-sectional view illustrating a configuration of the roller unit of FIG.
FIG. 5 is a view for explaining a method of assembling the linear guide device shown in FIG. 1;
6 is a diagram showing a method for measuring a dimension A of FIG.
FIG. 7 is a view showing a method of processing the slider shown in FIG. 5;
FIG. 8 is a diagram illustrating a method for measuring a dimension B in FIG. 5;
FIG. 9 is a partially sectional front view of a linear guide device according to a second embodiment of the present invention.
FIG. 10 is a front view of the slider shown in FIG. 9;
FIG. 11 is a front view of the guide rail shown in FIG. 9;
FIG. 12 is a diagram illustrating a configuration of a roller unit in FIG. 9;
FIG. 13 is a view showing a modified example of the roller unit.
[Explanation of symbols]
11, 31 Slider 11a, 31a Sleeve 11b, 31b Roller mounting seat surface 12, 32 Guide rail 12a, 32a Roller track surface 13, 33 Roller unit 13a, 33a Roller shaft 13b, 33b Inner ring 13c, 33c Rolling element 13d, 33d Roller Body 13e Spacer 33e Step 14, 34 Roller mounting nut 17, 37 Positioning shoulder 24 Grinding machine 36 Guide rod

Claims (8)

A guide rail having a roller track surface on both side surfaces, and a cylindrical roller body comprising a slider having a plurality of roller units disposed on both sides of the guide rail, and contacting the roller unit with the roller track surface; In a linear guide device comprising a roller shaft rotatably supporting the roller body,
A linear guide device, wherein positioning sliders are provided on both side portions of the slider to engage with a part of the roller shaft to determine a contact position of the roller body with respect to the roller track surface. The linear guide device according to claim 1, wherein a part of the roller shaft is a spacer. The linear guide device according to claim 1, wherein a part of the roller shaft is a step portion of the roller shaft. The linear guide device according to any one of claims 1 to 3, wherein the roller body is supported by the roller shaft via a rolling element and an inner ring. The linear guide device according to claim 4, wherein the inner ring is formed integrally as a part of the roller shaft. 6. The linear guide device according to claim 1, wherein the positioning shoulder is processed at the same time as a roller mounting seat surface formed on the slider. The linear guide device according to claim 2, wherein the positioning shoulder engages with the spacer on a side opposite to the roller raceway surface. 4. The linear guide device according to claim 3, wherein the positioning shoulder engages with the step on the opposite side of the roller raceway surface.

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