JP2501575Y2 - V type linear roller guide bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has two rows of endlessly circulating rollers.
The present invention relates to a V-shaped linear roller guide bearing mounted on a reciprocating movement guide surface in a large machining center, a lathe, an electric discharge machine or the like.

[Conventional technology]

A conventional linear roller guide bearing of this type is disclosed in, for example, JP-A-62-63214 (see FIG. 9). This linear roller guide bearing 1 has guide blocks 2 and 3 having a track-shaped planar shape projecting from the center of each of the inner inclined surfaces 1a and 1a of a long block body having a substantially square cross section, and one side surface of the guide projection bank 2 and 3a. Bearing surface 6 in which the rolling surface 4 for rolling and other side surfaces are rolling surfaces 5 for unloaded rollers, and the bearing body 6 circulates along the rolling surface 4 for loaded rollers and the rolling surface 5 for unloaded rollers. Roller holding that faces the cylindrical roller 7 in parallel with the inner inclined surface 1a of the bearing body 6 and holds the end surface of the cylindrical roller 7 with a slight gap in the gap while guiding the cylindrical roller 7 in a circularly movable manner. And machine 8. A mounting screw hole 9 is provided in a diagonal direction in the main body 6 from a ridge portion where the outer inclined surfaces 1c and 1d intersect each other.

The linear roller guide bearing 1 is used by being interposed between a track base 11 extending in the axial direction and a movable table 12 which is a long block body having a substantially U-shaped cross section and arranged so as to straddle the track base 11. To be The trackway 11 has a rolling surface 13 for load rollers, which is a vertically inclined surface at the tip of the left and right jetty that protrudes in the horizontal direction.
On the other hand, the movable table 12 has an axial V-shaped groove 14 on the inner side surfaces of both sleeve portions and a bolt insertion hole 15 penetrating from the depth of the V-shaped groove 14 to the outer side surface of the sleeve portion. There is. The outer inclined surfaces 1c and 1d of the linear roller guide bearing 1 are fitted into the respective V-shaped grooves 14 of the movable table 12, and the bolts 16 inserted into the bolt insertion holes 125 are screwed into the mounting screw holes 9. The linear roller guide bearing 1 is attached to the movable table 12. Load roller B1
Is in contact with each rolling surface 13 for the load rollers of the track base 11 and rolls as the movable table 12 moves.

[Problems to be solved by the invention]

In the conventional linear roller guide bearing 1, the cylindrical roller 7 is rotatably held by the roller retainer 8 attached to the bearing body 6 with a small gap between the end faces thereof. When the roller guide bearing 1 is removed from the way 11, the load roller B1 may fall off the linear roller guide bearing 1.

Therefore, in order to prevent the rollers from falling off and to facilitate the assembly of the linear roller guide bearing 1, an inside of the bearing body 6 is provided with a mounting body for preventing falling that extends in the axial direction and has a substantially U-shaped cross section. It has been proposed to mount and hold the inner circumference of the load roller B1 in a rollable manner.

However, since the attachment preventing body is a long body having a substantially U-shaped cross section, it is troublesome to manufacture and the die cost is expensive.
In addition, there is a problem that the rolling of the load roller B1 is likely to be hindered due to manufacturing errors and mounting errors.

Further, in the conventional linear roller guide bearing 1, the screw holes 9 for the mounting bolts are formed on the outer inclined surfaces 1c, 1d of the bearing body 6.
Since they are provided in the diagonal direction in the main body from the ridges intersecting with each other, there is a problem that drilling work and tapping work of the bolt screw holes 9 are extremely difficult to perform. In addition, since the bolts 16 are attached from only one direction, there is a problem that if the attachment angle does not match even a little, backlash easily occurs.

The present invention has been made to solve such conventional problems, and an object thereof is to make a roller holder that is simple and inexpensive to manufacture, and that does not hinder rolling of a load roller. It is an object of the present invention to provide a linear roller guide bearing which is provided with the above-mentioned, which is extremely easy to drill a hole for a mounting bolt, and which can be firmly mounted without rattling.

[Means for solving problems]

In order to achieve the above object, the present invention has a V-shaped cross section and is formed to be long in the axial direction.
A pair of roller passages and a partition wall are formed by notching the outer ridge portion and the inner ridge portion in a stepwise manner at both ends of the character shape that extend in the axial direction, and the rollers inside and outside the partition wall are formed. A bearing main body in which one of the passages serves as a load roller passage; an end cap fixed to both ends of the bearing main body in the axial direction and provided with curved passages that communicate the pair of roller passages; A large number of cylindrical rollers which are rotatably inserted into an elliptical infinite circulation path consisting of curved paths and whose ridges have inclined surfaces, and cylinders which cover the outer end surface of the cylindrical rollers and at least are inside the partition wall. A first roller retainer fixed to at least an outer surface of a partition wall of the bearing main body, the first roller retainer having a drop-preventing protruding edge portion adjacent to one inclined surface of the roller on a side edge extending in the axial direction; Close the bearing body A second roller retainer which is fixed to a plane formed between the roller passages and has an axially long rectangular cross section whose side edge extending in the axial direction is close to the other inclined surface of the inner cylindrical roller. The bearing main body has a plurality of bolt insertion holes that extend from the outer surface of the partition wall formed between the roller passages to the outer surface on the opposite side, and are alternately arranged along the axial direction in a direction intersecting with each other. And at least one of the outer surface of the bearing body facing the outer surface of the partition wall and the outer surface of the partition wall overhangs to the outside of the first roller retainer at an intersecting angle, and the load side The mounting surface corresponding to the inner roller passage or the outer roller passage is formed.

[Action]

The ridge portion of the cylindrical roller rolling in the roller passage of the bearing main body is an inclined surface, and one of the inclined surfaces is restricted by the fall-off preventing projected edge portion of the first roller retainer, and the other inclined surface is Since it is regulated by the side edge of the second roller holder, the cylindrical roller can be completely prevented from falling off.

The second roller retainer is not a complicated shape as in the past, but a plate-shaped member having a simple rectangular cross section, so that the second roller retainer is easy to manufacture and inexpensive, and the manufacturing error and the mounting error can be easily adjusted, so that the cylindrical shape Does not hinder the rolling of the rollers.

Since the insertion hole of the mounting bolt is made to penetrate from the outer surface of the partition wall extending in the axial direction of the V-shaped bearing main body to the outer surface on the opposite side in a direction intersecting with each other, drilling work for the bolt is extremely easy. . Further, since the bearing main body is bolted to the mounting surfaces having an intersecting angle from two directions, respectively, the linear roller guide bearing device can be firmly mounted at a predetermined position without rattling.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention.

The bearing body 21 of the linear roller guide bearing 20 of this embodiment is
The cross section has an orthogonal V shape and is formed long in the axial direction. Both sides 21a, 21b extending in the axial direction at both ends of the orthogonal V-shape
In both cases, the outer ridge portion and the inner ridge portion are notched in a stepwise manner at right angles to form a partition wall 22 that is long in the axial direction and a pair of roller passages 23a and 23b that are parallel to both sides sandwiching the partition wall 22. Each is formed. Wall surface 2 inside the partition wall 22 (roller passage 23a side)
Reference numeral 2a denotes a loaded roller rolling surface, and wall surface 22b outside the partition wall 22 (roller passage 23b side) is an unloaded roller rolling surface.

The bearing body 21 has a plurality of (three in the figure) bolt insertion holes 25 penetrating from the outer side surface 21a of one partition wall 22 to the outer side surface 24 on the opposite side, and faces the outer side surface 21b of the other partition wall 22. (Two in the figure) bolt insertion holes that penetrate the outer surface 26 on the side
And 27 are arranged alternately along the axial direction in directions orthogonal to each other, and are provided with counterbores 28 at both ends.

End caps 30 having a transverse V-shaped cross section are joined to both ends of the bearing body 21 in the axial direction. The joint end surface of the end cap 30 is provided with a curved path 31 that connects the pair of roller passages 23a and 23b of the bearing body 21 to each other, and the roller passages 23a and 23b and the curved portions 31 at both ends have an elliptical endless circulation path. C is formed. Reference numeral 32 is a semi-cylindrical return guide that forms the inner wall surface of the curved portion 31, and the end cap 30
It is attached to the end face of. A large number of cylindrical rollers 33 are rotatably inserted in the infinite circulation path C.
Each of the cylindrical rollers 33 has an outer inclined surface 33a and an inner inclined surface 33b formed by chamfering its ridge.

The bearing body 21 in which the cylindrical roller 33 is inserted has a plate-shaped first roller formed in an L-shaped cross section from the outer surface 21a (21b) of the partition wall 22 to the outer surface 26 (24) on the opposite side. Cage 35
Are fixed with machine screws 36. This first roller holder 35
Covers the outer end surface of the cylindrical roller 33 in the endless circulation path C so as to be rollable with a very small gap, and also to similarly roll the cylindrical surface of the unloaded roller B2 in the outer roller passage 23b. It is large enough to cover everything. Then, on the inner side edge extending in the axial direction of the roller holder 35,
Outer inclined surface 33a of the load roller B1 in the roller passage 23a
It has a fall-off preventing projection edge portion 37 formed in accordance with the above.

Further, between the roller passages 23a adjacent to the partition wall 22 of the V-shaped bearing main body 21, there is formed a small width plane 38 extending in the axial direction, and there is a second plate-shaped member having a rectangular cross section elongated in the axial direction.
The roller holder 40 is fixed by machine screws 41. The second roller holder 40 has side edges 40a extending in the axial direction thereof.
Is inside the roller passage 23a, the inclined surface 3 inside the load roller B1
It is formed close to 3b. That is, the bearing body 21
In the present embodiment in which is a rectangular V-shape, the outer inclined surface 33a of the roller has an inclination angle of 45 degrees, and correspondingly, both side edges 40a extending in the axial direction of the second roller holder 40 are formed. It is a vertical surface.

The outer surfaces 21a and 21b of the partition wall 22 of the bearing body 21 and the outer surfaces 24 and 26 facing the outer surfaces 21a and 21b are both the first cage 3
5 overhangs to form mounting surfaces that are fixed to the movable table at crossing angles.

 Next, the operation will be described.

The load roller B1 is regulated by locking the outer inclined surface 33a of the load roller B1 with the drop-out preventing projection 37 of the first roller holder 35, and the inner inclined surface 33b of the load roller B1 with the side surface 40a of the second roller holder 40. It will be stopped and regulated, so it will not drop out.

The unloaded roller B2 is surrounded by the L-shaped first roller holder 35 and does not fall off.

The first roller retainer 35 is a simple L-shaped plate, and the second roller retainer 40 is a simpler plate-shaped member having a rectangular cross section, so that it can be easily and inexpensively manufactured. Also, since the shape is simple, even if there is a manufacturing error or mounting error, it can be easily adjusted by simply shifting the position.
Rolling is not hindered.

Straight roller guide bearing 20 mounting bolt insertion holes 26, 27
Are orthogonal to the outer side surfaces 21a, 21b extending in the axial direction of the bearing body 21 and penetrate the outer side surfaces 24, 26 on the opposite side, respectively, so that the drilling work is extremely easy.

When the linear roller guide bearing 20 is mounted on the machine table 46 as shown in FIG. 5, for example, the bolt insertion hole 2
Since bolts are inserted into 5,27 and bolted in two directions with the outer surfaces 24,26 having an intersecting angle as mounting surfaces, the mounting can be performed firmly without backlash.

Machine table 46 with the above linear roller guide bearing 20 attached
Is placed on the machine bed 45, and the load is received by the load roller B1. When the machine table 46 is driven, the load roller B1 rolls on the rolling surface formed by the inverted V-shaped slope 48 provided on the machine bed 45. Cylindrical roller as machine table 46 moves
The roller train 33 is circularly moved in the infinite circulation path C, and the machine table 46 is smoothly moved.

 A second embodiment is shown in FIGS. 3 and 4.

In this embodiment, the load roller B1 of the cylindrical roller 3 is arranged outside the bearing body 21. Load roller B1
In order to expose the cylindrical surface of the first roller holder 35A to the outside, the first roller retainer 35A is not L-shaped, but a flat plate-like shape.
Has 37B. The fall-off preventing protrusion 37A on the inner side edge is an inclined surface 33a on the outer side of the unloaded roller B2 in the roller passage 23a.
On the other hand, the drop-out preventing projection 37B on the outer side edge corresponds to the outer inclined surface 33a of the load roller B1 in the roller passage 23b. In addition, 50 is an inclined surface inside the load roller B1.
The bearing main body 2 is provided with an inclined surface 51 corresponding to 33b for preventing falling.
The third roller holder is a long plate-shaped roller holder attached to each of the outer surface 24 and the outer surface 26 of 1.

Other configurations and operational effects are similar to those of the first embodiment.

5 to 8 show a linear roller guide bearing of the present invention.
20 shows 20 different modes of use.

5 and 6 show a linear roller guide bearing 20 of the type shown in the first embodiment in which the load roller B1 is arranged inside the bearing body 21.
The linear roller guide bearing 20 and the well-known flat type linear roller guide bearing 47 having a rectangular outer shape are attached to the mechanical table 46 which is linearly moved by being guided by the mechanical bed 45.

Since one V-shaped linear roller guide bearing 20 can receive loads in two directions, it can be used for two flat type linear roller guide bearings 47, and the number of linear roller guide bearings used is reduced, resulting in cost reduction. Moreover, the same function can be obtained in a small space.

7 and 8 show a linear roller guide bearing 20 of the type shown in the second embodiment in which the load roller B1 is arranged outside the bearing body 21.
Is used. In this embodiment, the outer surface of the bearing body 21
The case where 21a and 21b are used as mounting surfaces is shown.

In each of the above-described embodiments, the case where the outer surface 24 and the outer surface 26 of the bearing main body 21 are orthogonal V-shaped with the intersecting angle of 90 degrees is described, but the present invention is not limited to this, for example, 45 degrees or 120. It may be V-shaped such as degrees.

[Effect of device]

As described above, according to the present invention, the shape of the roller cage is a plate-shaped member having a simple shape, and the linear roller guide bearings are mounted on the mounting surfaces having the intersecting angles of the bearing bodies respectively. The bolts inserted from the direction are tightened.

Therefore, it is easy and inexpensive to manufacture, and it is equipped with a roller retainer that does not hinder the rolling of the load roller, and it is extremely easy to drill holes for the bolts that mount the bearing body, and it can be firmly mounted without backlash. There is an effect that a simple linear roller guide bearing can be provided.

[Brief description of drawings]

1 is a side view of the first embodiment of the present invention with a part cut away, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a part of the second embodiment cut out. The side view of Fig. 4 is IV-I in Fig. 3.
5 is a schematic view showing a mode of use of the present invention, and FIG. 9 is a sectional view in which a conventional V type linear roller guide bearing is attached to a machine table. 20 is a linear roller guide bearing, 21 is a bearing main body, 21a and 21b are outer surfaces of partition walls, 22 is a partition wall, 23a and 23b are roller passages, 24,
26 is an outer surface, 25 and 27 are bolt insertion holes, 30 is an end cap, 31 is a curved path, 33 is a cylindrical roller, 33a and 33b are inclined surfaces, 3
5, 35A is a first roller holder, 37, 37A, 37B are fall-off preventing projections, 38 is a flat surface, and 40 is a second roller holder.

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of rollers which are formed in a V-shaped cross section to be long in the axial direction, and at both ends of the V-shape which extend in the axial direction, have outer and inner ridges cut out in steps. A bearing body in which a passage and a partition wall are respectively formed, and one of the roller passages inside and outside the partition wall is a load roller passage; and a bearing main body fixed to both ends in the axial direction of the bearing body. An end cap having a curved path that connects the pair of roller passages, and a large number of cylinders that are rotatably inserted into an elliptical endless circulation path that is formed by the roller passage and the curved path and that has an inclined surface at a ridge. A roller, and at least a partition of the bearing main body, which has an axially extending side edge that covers the outer end surface of the cylindrical roller and is close to at least one inclined surface of the cylindrical roller inside the partition wall. Fixed to the outside of the wall And a cylindrical roller having an axially long rectangular cross section fixed to a plane formed between the adjacent roller passages of the V-shaped bearing body and extending in the axial direction. A second roller retainer close to the other inclined surface of the bearing body, the bearing body penetrating from the outer surface of the partition wall formed between the roller passages to the outer surface on the opposite side and intersecting each other. At least one of the outer surface of the bearing main body and the outer surface of the partition wall, which have a plurality of bolt insertion holes arranged alternately along the axial direction in the direction of A V-shaped linear roller guide bearing, wherein the V-shaped linear roller guide bearing extends outward from the first roller retainer at a crossing angle and has mounting surfaces corresponding to the inner roller passage and the outer roller passage, respectively, which are the load side.