JP2008138840A - Slider for linear guide device - Google Patents

Abstract

When a linear guide device is used with a slider body portion facing upward and both leg portions facing downward, the difference in the amount of oil supply in the upper and lower direction change paths of each leg portion is reduced.
An oil passage hole is formed at the axial center of a return guide. In the return guide groove 22b between the upper and lower concave portions 22a of the end cap 22, the connection groove 5 for connecting the upper and lower concave portions 22a is formed. The lubricant that has entered the oil passage 45 formed by the main body 21 and the concave surface of the return guide 4 enters the connection groove 5 through the oil passage hole 41, and the upper and lower direction change paths (recesses 22 a and the return guide) from the connection groove 5. 4), a space formed by the four convex surfaces 4a.
[Selection] Figure 4

Description

  The present invention relates to a slider of a linear guide device.

A conventional example of a linear guide device will be described with reference to FIGS.
FIG. 14 is a front view showing the linear guide device with the right half of the end cap removed. FIG. 15 is a plan view of the linear guide device partially shown in cross section so that the inside of the circulation path can be seen. FIG. 16 is a perspective view showing an end cap and a return guide.
As shown in these drawings, the linear guide device includes a guide rail 1, a slider (also referred to as “bearing”) 2, and a plurality of balls (rolling elements) 3.

  Two rolling grooves 11 extending in parallel with the longitudinal direction are formed on each side surface of the guide rail 1. The slider 2 includes leg portions 2A disposed on both sides in the width direction of the guide rail 1, and a body portion 2B that couples both leg portions 2A. The body portion 2B is disposed on one end side (in this drawing, on the upper surface side of the guide rail 1) in the thickness direction of the guide rail 1 (direction perpendicular to both the length direction and the width direction). Then, both inner side surfaces of the slider 2 are disposed opposite to both side surfaces of the guide rail 1.

The slider 2 is divided into a main body 21 and an end cap 22 in the linear motion direction, and the end caps 22 are disposed at both ends of the slider main body 21 in the linear motion direction. On both inner side surfaces of the slider body 21, rolling grooves 21 a that face the rolling grooves 11 of the guide rail 1 are formed. These rolling grooves 11 and 21a form the rolling passage 12 of the ball 3.
Further, two linear return passages 21b are formed outside the respective rolling grooves 21a of the slider main body 21 with an interval in the vertical direction. A female screw 21c for attaching the end cap 22 is formed between the two return passages 21b. A female screw 21d for attaching the end cap 22 is also formed on both sides of the position where the grease nipple N or the oil supply piping joint is attached to the body 2B of the slider body 21.

As shown in FIG. 16, the end cap 22 includes a pair of leg portions 22 </ b> A that form the linear motion direction end portions of the leg portions 2 </ b> A of the slider 2 and a trunk portion that forms the linear motion direction end portions of the body portion 2 </ b> B of the slider 2. 22B.
On the surface of each leg 22A on the slider main body 21 side, two semicircular arc-shaped concave portions 22a and a groove (return guide groove) 22b for attaching the return guide 40 are formed. Each leg portion 22A is provided with a through hole 22c at a position corresponding to the female screw 21c of the slider body 21, and the two concave portions 22a are arranged above and below the through hole 22c.

  The return guide 40 is formed in a semi-cylindrical shape, and the arcuate convex surface 4 a is fitted into the return guide groove 22 b of the end cap 22. Thereby, the direction change path 24 is formed by the concave portion 22a of the end cap 22 and the arcuate convex surface 4a of the return guide 40. The return guide 40 is provided with two oil passage holes 41 corresponding to the upper and lower recesses 22a.

At the center in the width direction of the body portion 22B of one end cap 22, a hole (oil supply port) 22d for attaching a grease nipple N or a joint for oil supply piping is formed. Further, through holes 22e are provided on both sides of the oil filler opening 22d and at positions corresponding to the female screw 21d of the slider body 21.
An oil supply groove 22 f for introducing a lubricant into the direction change path 24 is further formed on the surface of the end cap 22 on the slider body 21 side. The oil supply groove 22f is formed to extend from the oil supply port 22d to the left and right (outside in the width direction), pass through its periphery along the through hole 22e, and then bend at a right angle to reach the recess 22a.

  Therefore, after the return guide 40 is fitted into the return guide groove 22b, the end cap 22 is attached to the slider body 21, whereby an oil passage 45 (see FIG. 15) is formed between the slider body 21 and the return guide 40. Is done. As a result, the lubricant supplied from the grease nipple N or the joint for oil supply piping enters the oil passage 45 through the oil supply groove 22f, and is then introduced into the direction change passage 24 from the oil passage hole 41. Thus, the ball 3 is lubricated.

In addition, the rolling passage 12 and the return passage 21b are communicated with each other through the direction change path 24, and a circulation path 25 that circulates the ball 3 infinitely through each of these paths is configured. Then, as the ball 3 circulates through each circulation path 25, the slider 2 slides along the guide rail 1.
When such a linear guide device is used with the slider body 22B facing upward (or lower) and both legs 22A facing downward (or upper), the amount of lubricant supplied is More on the upper turning path than on the lower turning path.

  On the other hand, as shown in FIG. 17, the position of the oil passage hole 41 is arranged below the center of the recess 22a of the end cap 22 in the upper direction change path, and the end cap in the lower direction change path. It arrange | positions rather than the center of 22 recessed part 22a. However, even if it does in this way, the effect which makes small the difference in the amount of oil supply in an up-and-down direction change way is inadequate.

In addition, as a patent application related to the slider characterized by the return guide, the purpose is to easily attach the return guide to the end cap and prevent the lubricant from leaking (see Patent Document 1 below), There is a thing characterized by making it a long hole or a long groove when it is made of metal (see Patent Document 2 below), but the purpose is to reduce the difference in the amount of oil supply in the upper and lower direction change paths of each leg. I have not found any of these items at this time.
No. 07-029297 No. 2539401 Publication

  The present invention changes the vertical direction of each leg when using the linear guide device with the slider body facing upward (or lower) and both legs facing downward (or upper). It is an object to reduce the difference in the amount of oil supply on the road.

  In order to solve the above problems, the present invention provides a slider that constitutes a linear guide device together with a guide rail and a rolling element, the main body having a rolling surface of the rolling element and a return passage of the rolling element, and a linear motion of the main body An end cap disposed at both ends of the direction, a convex surface that is disposed between the main body and each leg portion of the end cap and forms a direction change path of the rolling element, a concave surface that forms an oil path between the main body, and And a return guide having an oil passage hole penetrating the convex surface and the concave surface, and the end cap is a concave portion constituting a direction change path of the rolling element provided at a plurality of positions on each leg portion on the surface of the main body side. And an oil supply groove for supplying a lubricant to an oil passage formed by the return guide and the main body, and an oil supply port for introducing the lubricant into the oil supply groove. The return guide has the oil passage hole. Each of the end caps Is formed at a position between the two recesses adjacent to each other, and a connection groove connecting the oil passage hole and the two recesses adjacent to each leg is formed on the convex surface of the return guide or the main body side of the end cap. Provided is a slider of a linear guide device characterized by being formed on a surface.

According to this slider (first slider), the lubricant introduced from the oil supply port of the end cap enters the oil passage formed by the main body and the concave surface of the return guide through the oil supply groove, and then returns. The guide groove enters the connection groove, and then enters the corresponding adjacent turning path from the connection groove.
Therefore, when the linear guide device is used with the body portion of the slider facing upward (or the lower side) and the both leg portions facing the lower side (or the upper side), The difference in the amount of oil can be reduced.

  The present invention is also a slider that constitutes a linear guide device together with a guide rail and a rolling element, and is disposed at a main body having a rolling surface of the rolling element and a return passage of the rolling element, and at both ends in the linear motion direction of the main body. A convex surface that is disposed between the end cap, the main body, and each leg portion of the end cap to form a direction change path of the rolling element, a concave surface that forms an oil path with the main body, and the convex surface and the concave surface are penetrated A return guide having an oil passage hole, and an end cap provided in a plurality of locations at each leg on the surface of the main body, and a recess that forms a direction change path of the rolling element, and the return guide It has an oil supply groove for supplying a lubricant to an oil passage formed with the main body, and has an oil supply port for introducing the lubricant into the oil supply groove, and the return guide has the oil passage hole, the use state of the end cap At the top A connecting groove that is formed at one place arranged in the concave portion and connects the oil passage hole and all the concave portions of each leg portion is formed on the convex surface of the return guide or the main body side surface of the end cap. A slider for a linear guide device is provided.

According to this slider, the lubricant introduced from the oil supply port of the end cap enters the oil passage formed by the main body and the concave surface of the return guide through the oil supply groove, and then from the oil supply hole of the return guide. It enters the uppermost direction change path with the connection groove, and goes to all direction change paths from the connection groove by the action of gravity. Therefore, when the linear guide device is used with the body portion of the slider facing upward (or the lower side) and the both leg portions facing the lower side (or the upper side), The difference in the amount of oil can be reduced.
In addition, when the lubricant used is a lubricant that is easily affected by gravity, this slider can reduce the difference in the amount of oil supplied in the upper and lower direction change paths of each leg than the first slider. Is expensive.

  According to the slider of the present invention, when the linear guide device is used with the body of the slider facing upward (or the lower side) and both legs facing the lower side (or the upper side), The difference in the amount of oil supply in the upper and lower direction change paths can be reduced.

  Hereinafter, embodiments of the present invention will be described. In addition, since the basic structure of the linear guide apparatus shown by this embodiment is the same as FIGS. 14-16, the same part attaches | subjects the same code | symbol and abbreviate | omits description.

[First Embodiment]
The first embodiment will be described with reference to FIGS.
FIG. 1 is a front view (surface on the slider main body side) showing an end cap used in this embodiment. FIG. 2 is a view showing a return guide used in this embodiment, FIG. 2 (a) is a plan view, and FIG. 2 (b) is a view with the convex side facing forward. 3 is a view showing a state where the return guide of FIG. 2 is attached to the end cap of FIG. 4 is a cross-sectional view taken along line AA in FIG.

In the return guide 4 of this embodiment, an oil passage hole 41 is formed at the axial center of the semi-cylindrical body, and a positioning projection 42 is formed at a position aligned with the oil passage hole 41 on the outer peripheral surface.
In the end cap 22 of this embodiment, a connecting groove 5 for connecting the upper and lower concave portions 22a is formed in a return guide groove 22b between upper and lower concave portions (two concave portions adjacent to each leg portion 22A) 22a. . A positioning recess 6 for fitting the positioning projection 42 of the return guide 4 is formed outside the return guide groove 22b.

According to the slider of this embodiment, the lubricant introduced from the oil supply port 22d of the end cap 22 is formed by the slider main body 21 and the concave surface of the return guide 4 through the oil supply groove 22f as shown in FIG. And then enters the connecting groove 5 from the oil passage hole 41 of the return guide 4, and then forms an upper and lower direction changing path (the recessed portion 22 a and the convex surface 4 a of the return guide 4 from the connecting groove 5. Space 24).
Therefore, when the linear guide device is used with the slider body 2B facing upward (or lower) and both legs 2A facing downward (or upper), the vertical direction of each leg 2A is used. A difference in the amount of oil supply in the conversion path 24 can be reduced.

[Second Embodiment]
A second embodiment will be described with reference to FIGS.
FIG. 5 is a front view (surface on the slider main body side) showing the end cap used in this embodiment. 6A and 6B are views showing a return guide used in this embodiment, in which FIG. 6A is a plan view, FIG. 6B is a view with the convex side facing forward, and FIG. 6C is FIG. It is BB sectional drawing of b). 7 is a view showing a state where the return guide of FIG. 6 is attached to the end cap of FIG. FIG. 8 is a cross-sectional view taken along the line AA of FIG.

In the return guide 4 of this embodiment, an oil passage hole 41 is formed at the axial center of the semi-cylindrical body, and a positioning projection 42 is formed at a position aligned with the oil passage hole 41 on the outer peripheral surface. Further, a concave portion 43 extending in a predetermined range in the axial direction with the oil passage hole 41 as the center is formed on the convex surface 4 a of the return guide 4. As shown in FIG. 8, the formation range of the recess 43 is set so as to overlap a part of the upper and lower recesses 22 a when attached to the end cap 22. That is, the recess 43 corresponds to a connection groove that connects the oil passage hole 41 and the upper and lower recesses (two recesses adjacent to each leg 22A) 22a.
In the end cap 22 of this embodiment, a positioning recess 6 for fitting the positioning projection 42 of the return guide 4 is formed outside the return guide groove 22b between the upper and lower recesses 22a.

According to the slider of this embodiment, the lubricant introduced from the oil supply port 22d of the end cap 22 is formed by the slider main body 21 and the concave surface of the return guide 4 through the oil supply groove 22f as shown in FIG. And then enters the connection groove 43 from the oil passage hole 41 of the return guide 4, and then forms an upper and lower direction change path (the concave portion 22 a and the convex surface 4 a of the return guide 4 from the connection groove 43. Space 24).
Therefore, when the linear guide device is used with the slider body 2B facing upward (or lower) and both legs 2A facing downward (or upper), the vertical direction of each leg 2A is used. A difference in the amount of oil supply in the conversion path 24 can be reduced.

[Third Embodiment]
A third embodiment will be described with reference to FIGS. 1 and 9 to 11.
FIG. 9 is a view showing a return guide used in this embodiment, and is a view with the convex surface side facing forward. In this embodiment, the end cap of FIG. 1 used in the first embodiment is used. 10 is a view showing a state where the return guide of FIG. 9 is attached to the end cap of FIG. 11 is a cross-sectional view taken along line AA in FIG.

  In the return guides 4A and 4B of this embodiment, an oil passage hole 41 is formed at one axial end of the semi-cylindrical body, and a positioning projection 42 is formed at the axial center of the outer peripheral surface. The difference between the return guides 4 </ b> A and 4 </ b> B is the positional relationship between the positioning protrusion 42 and the oil passage hole 41. When the oil passage hole 41 is on the upper side with the convex side facing forward, the positioning projection 42 is on the right side in the return guide 4A and on the left side in the return guide 4B.

The return guides 4A and 4B are attached to the leg portions 22A of the end cap 22 of FIG. 1, and the return guides 4A and 4B pass through the center of the recess 22a on the upper side of the end cap 22 as shown in FIG. The hole 41 is disposed.
According to the slider of this embodiment, the lubricant introduced from the oil supply port 22d of the end cap 22 passes through the oil supply groove 22f, and the concave surfaces of the slider main body 21 and the return guide 4A (4B) as shown in FIG. And enters an oil passage 45 formed by Next, the upper recess 22a and the connection groove 5 of the end cap 22 are entered from the oil passage hole 41 of the return guide 4A (4B), and after entering the lower recess 22a after dropping through the connection groove 5.

  Therefore, when the linear guide device is used with the slider body 2B facing upward and the legs 2A facing downward, the difference in the amount of oil supply in the upper and lower direction change paths 24 of each leg 2A is calculated. Can be small. Further, the slider of this embodiment has a vertical direction change path for each leg portion, compared to the sliders of the first and second embodiments described above, when the lubricant to be used is a lubricant that is easily affected by gravity. The effect of reducing the difference in the amount of oil supply is high.

[Fourth Embodiment]
The fourth embodiment will be described with reference to FIGS. 1, 9, 12, and 13.
When the linear guide device is used with the slider body 2B facing downward and the legs 2A facing upward, as shown in FIG. 12, the return guides 4A and 4B of FIG. It attaches to the end cap 22 of FIG. 1 so that the oil passage hole 41 may be arrange | positioned in the center of the recessed part 22a. 13 is a cross-sectional view taken along the line AA in FIG.

  According to the slider of this embodiment, the lubricant introduced from the oil supply port 22d of the end cap 22 passes through the oil supply groove 22f, and as shown in FIG. 13, the slider body 21 and the concave surface of the return guide 4A (4B). And enters an oil passage 45 formed by Next, the oil passage 45 is raised, enters the upper recess 22a and the connection groove 5 from the oil passage hole 41 of the return guide 4A (4B), falls through the connection groove 5, and then the lower recess. Enter 22a.

  Therefore, when the linear guide device is used with the slider body 2B on the lower side and both legs 2A on the upper side, the difference in the amount of oil supply in the upper and lower direction change paths 24 of each leg 2A is calculated. Can be small. Further, the slider of this embodiment has a vertical direction change path for each leg portion, compared to the sliders of the first and second embodiments described above, when the lubricant to be used is a lubricant that is easily affected by gravity. The effect of reducing the difference in the amount of oil supply is high.

In the third and fourth embodiments, the return guides 4A and 4B in which the connection groove is not formed on the convex surface 4b and the end cap of FIG. 1 in which the connection groove 5 is formed are combined, but the connection groove is formed on the convex surface. 5 may be combined with the end guide of FIG. 5 in which no connection groove is formed. You may combine the return guide in which the connection groove was formed in the convex surface, and the end cap of FIG. 1 in which the connection groove 5 was formed.
Further, the end cap of FIG. 1 and the return guide of FIG. 6 may be combined.

It is a figure which shows the end cap used in 1st, 3rd, 4th embodiment of the slider of this invention, Comprising: It is a figure which shows the slider main body side. It is a figure which shows the return guide used in 1st Embodiment of the slider of this invention, Comprising: (a) is a top view, (b) is the figure which made the convex surface side this side. It is a figure which shows the state which attached the return guide of FIG. 2 to the end cap of FIG. It is AA sectional drawing of FIG. It is a figure which shows the end cap used by 2nd Embodiment of the slider of this invention, Comprising: It is a figure which shows the slider main body side. It is a figure which shows the return guide used in 2nd Embodiment of the slider of this invention, Comprising: (a) is a top view, (b) is the figure which made the convex surface side this side, (c) is B- of (b). It is B sectional drawing. It is a figure which shows the state which attached the return guide of FIG. 6 to the end cap of FIG. It is AA sectional drawing of FIG. It is a figure which shows the return guide used in 3rd and 4th Embodiment, Comprising: It is the figure which made the convex surface side near this. It is a figure which shows 3rd Embodiment of the slider of this invention, Comprising: It is a figure which shows the state which attached the return guide of FIG. 9 to the end cap of FIG. It is AA sectional drawing of FIG. It is a figure which shows 4th Embodiment of the slider of this invention, Comprising: It is a figure which shows the case where a linear guide apparatus is arrange | positioned and used with the trunk | drum of a slider facing down and both legs facing up. It is AA sectional drawing of FIG. It is a front view which shows the prior art example of a linear guide apparatus in the state which removed the right half of the end cap. It is the top view which showed the linear guide apparatus of FIG. 14 partially with the cross section so that the inside of a circulation path could be understood. It is a perspective view which shows the conventional end cap and return guide. An example in which the position of the oil passage hole of the return guide is arranged below the center of the concave portion of the end cap in the upper direction change path, and is arranged above the center of the concave portion of the end cap in the lower direction change path. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide rail 11 Rolling groove 12 Rolling path 2 Slider 2A Slider leg 2B Slider body 21 Slider main body 21a Rolling groove 21b Return path 21c Female thread 21d Female thread 22 End cap 22A End cap leg 22B End cap Body 22a Recessed portion constituting direction change path 22b Return guide groove 22c Through hole 22d Oil supply port 22e Through hole 22f Oil supply groove 24 Direction change path 25 Circulation path 3 Ball (rolling element)
4 Return Guide 4A Return Guide 4B Return Guide 40 Return Guide 4a Convex Surface Constructing a Directional Change Path 41 Oil Passing Hole 42 Positioning Projection 43 Concave (Connection Groove)
45 Oil path composed of return guide and main body 5 Connection groove 6 Recess for positioning N Grease nipple

Claims (2)

A slider that constitutes a linear guide device together with a guide rail and rolling elements,
A main body having a rolling surface of the rolling element and a return passage of the rolling element;
End caps placed at both ends of the body in the linear motion direction;
A convex surface that is arranged between the main body and each leg portion of the end cap and forms a direction change path of the rolling element, a concave surface that forms an oil path between the main body and an oil passage hole that penetrates the convex surface and the concave surface A return guide having,
The end cap supplies the lubricant to the oil passage formed by the return guide and the main body on the main body side surface, which is provided in a plurality of positions at each leg portion and which forms the direction change path of the rolling element. It has an oil supply groove and an oil supply port for introducing a lubricant into the oil supply groove,
The return guide is formed at a position where the oil passage hole is between the two concave portions adjacent to each other at each leg portion of the end cap,
A slider for a linear guide device, characterized in that a connecting groove that connects the oil passage hole and the two adjacent concave portions of each leg portion is formed on the convex surface of the return guide or on the main body side surface of the end cap. . A slider that constitutes a linear guide device together with a guide rail and rolling elements,
A main body having a rolling surface of the rolling element and a return passage of the rolling element;
End caps placed at both ends of the body in the linear motion direction;
A convex surface that is arranged between the main body and each leg portion of the end cap and forms a direction change path of the rolling element, a concave surface that forms an oil path between the main body and an oil passage hole that penetrates the convex surface and the concave surface A return guide having,
The end cap supplies the lubricant to the oil passage formed by the return guide and the main body on the main body side surface, which is provided in a plurality of positions at each leg portion and which forms the direction change path of the rolling element. It has an oil supply groove and an oil supply port for introducing a lubricant into the oil supply groove,
The return guide is formed at one place where the oil passage hole is disposed in the concave portion which is the uppermost in the use state of the end cap,
A slider for a linear guide device, characterized in that a connection groove for connecting the oil passage hole and all the concave portions of each leg portion is formed on the convex surface of the return guide or the main body side surface of the end cap.

Images