JPH0665622U - Cross roller bearing - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cross roller bearing that has a long life by reducing the effect of the split surface formed on the outer ring at a low cost. The above-described effect is obtained by forming a concave portion 11 intersecting the dividing surface 1c and filling the filling member 12 in the concave portion 11 or by inclining the dividing surface 1c to make the contact with the roller 3 a point contact.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross roller bearing, and more particularly to a cross roller bearing in which an outer ring is formed with one dividing surface in a direction crossing its V-shaped groove.

[0002]

[Prior art]

8 to 11 show an example of this type of cross roller bearing. In addition,
The cross roller bearing is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-292919.

As shown in the drawing, the cross roller bearing has an outer ring 1 and an inner ring 2 each formed in an annular shape. A V-shaped groove 1a opening inward is formed on the inner peripheral surface of the outer ring 1 along the circumferential direction, and a V-shaped groove 2a opening outward is formed on the outer peripheral surface of the inner ring 2. It is formed along the circumferential direction. The outer ring 1 and the inner ring 2 are assembled by interposing a plurality of rollers 3 between the V-shaped grooves 1a, 2a.

Each roller 3 is composed of a cylindrical roller or a spherical roller, and as is clear from FIG. 10, they are arranged alternately so that the rotation axes of adjacent rollers intersect with each other. Further, as shown in the figure, a separator 4 is interposed between each roller 3.

As shown in FIGS. 8 and 11, the outer ring 1 is formed with one dividing surface 1b in a direction crossing the V-shaped groove 1a. This dividing surface 1b is for expanding the outer ring 1 at this portion as shown by the arrow F in FIG. 11 and for inserting the roller 3 and the separator 4 into the gap formed between the outer ring 1 and the inner ring 2. It is a thing.

As described above, since the outer ring 1 is divided into one portion in the direction crossing the V-shaped groove 1a, the V-shaped groove 1a of the outer ring 1 can be processed with high accuracy, and therefore It is said that the relative rotational movement of the inner and outer wheels performed via the rollers 3 is performed smoothly and with high accuracy. The divided surface 1b is formed by fracture, and therefore, when the cross roller bearing is incorporated in the turning part of a machine, the divided surfaces 1b are completely aligned with each other and the roundness is ensured. It is supposed to be done. The outer ring 1 having such a structure is called a one-piece outer ring.

[0007]

[Problems to be solved by the device]

 However, in the cross roller bearing having such a structure, if a minute gap is formed between the divided surfaces 1b, if the load is large and the rotation speed is high, or if the gap is used for a long period of time, this gap will be generated by the roller 3. It has the drawbacks of accelerating the wear of the machine and hindering the smooth rotation state to some extent.

In order to solve this problem, various connecting means for connecting the parts divided by the dividing surface 1b have been proposed in order to make the above gap as small as possible. However, the structure of these coupling means is relatively complicated, which is not always preferable when the manufacturing cost of the bearing is to be reduced.

Therefore, the present invention has been made in view of the above-mentioned drawbacks of the prior art, and provides a cross roller bear ring that achieves a long life by inexpensively reducing the influence of the dividing surface formed on the outer ring. The purpose is to

[0010]

[Means for Solving the Problems]

 According to the present invention, an outer ring having a V-shaped groove, which opens inwardly on the inner peripheral surface, is formed along the circumferential direction, and a dividing surface is formed at one location in a direction crossing the V-shaped groove. , An inner ring formed with V-shaped grooves that open outward on the outer peripheral surface along the circumferential direction, and a plurality of V-shaped grooves are formed so that the rotation axes of adjacent ones intersect with each other. In a cross roller bearing assembled by interposing rollers, parts divided by the dividing surface are connected by a filling member at one position of the width of the dividing surface. Further, the present invention provides an outer ring in which a V-shaped groove that opens inwardly is formed on the inner peripheral surface along the circumferential direction, and a dividing surface that crosses the V-shaped groove is provided at one location. And an inner ring formed with a V-shaped groove that opens outward on the outer peripheral surface along the circumferential direction, so that the rotation axes of the adjacent ones intersect between the V-shaped grooves. In a cross roller bearing formed by interposing a plurality of rollers, the divided surfaces are formed so as to intersect each other at a predetermined angle with respect to a direction orthogonal to the V-shaped groove.

[0011]

【Example】

 Next, embodiments of the present invention will be described with reference to the accompanying drawings. The cross roller bearing according to the present invention has the same structure as that of the conventional cross roller bearing shown in FIGS. 8 to 11, except for the part described below. Only will be described. Further, in the following description, the same reference numerals are used for the same components as those of the conventional cross roller bearing.

1 to 5 show a cross roller bearing as a first embodiment of the present invention.

In each drawing, a dividing surface 1 c provided at one location on the outer ring 1 forms a plurality of substantially V-shaped notches 1 d on one side surface and an inner peripheral surface of the outer ring 1, and these notches 1 d It is formed by applying a concentrated load to the part and is orthogonal to the V-shaped groove 1a of the outer ring 1.

The following structure is provided so that the parts divided by the dividing surface 1c are firmly bonded to each other and no gap is generated between the dividing surfaces 1c.

As shown in FIGS. 1, 2 and 5, the outer peripheral surface of the outer ring 1 has a concave portion that extends so as to intersect the dividing surface 1c at one location of the width of the dividing surface 1c. 11 is formed, and the filling member 12 is filled in the recess 11. The filling member 12 is made of synthetic resin or the like as a material thereof, and is made by heating and melting it into the concave portion 11 and then cooling and solidifying. The surface of the filling member 12 is set to be flush with the outer peripheral surface of the outer ring 1 or less.

As is apparent from FIG. 2, the concave portion 11 intersects with the sentence dividing surface 1c at a substantially central portion thereof, and the width B of the intersecting portion or a portion in the vicinity thereof is larger than that of other portions. Then, it is formed to be narrow. With such a configuration, the divided surfaces 1c are firmly joined to each other and are not separated from each other unless the filled filling member 12 is broken.

Note that, as shown in FIG. 2, in the present embodiment, the shape of the concave portion 11 is such that two circles having the same diameter intersect with each other on the dividing surface 1c, but the shape is not limited to this. Of course, various other shapes may be adopted.

As described above, since the coupling means is constituted simply by only the filling member 12, the cost is relatively low.

The material of the filling member 12 is not limited to the synthetic resin as described above, but a steel plate or the like is used to form the filling member 12 into a shape that can be closely fitted into the recessed portion 11, and is fixed by means such as brazing. You may. However, compared to the configuration in which the synthetic resin is simply injected as described above, it takes some time.

6 and 7 show the essential parts of a cross roller bearing as a second embodiment of the present invention.

As shown in the figure, in the cross roller bearing, the dividing surface 1c of the outer ring 1 is formed so as to intersect the V-shaped groove 1a of the outer ring 1 at an angle of θ with respect to a direction XX orthogonal to the V-shaped groove 1a. Has been formed. It is desirable that the angle θ be in the range of about 10 to 20 ^° , and for example, about 15 ^° is preferable.

In such a configuration, when the roller 3 rolls along the V-shaped groove 1a, the roller 3 forms a point with respect to an extremely minute gap generated between the divided surfaces 1b. The contact surface rolls as it makes contact, and the effect of the split surface is reduced compared to the situation where the roller rolls in line contact with the gap as in the conventional cross roller bearing.

[0023]

[Effect of device]

 As described above, according to the present invention, there is an effect that the influence of the dividing surface formed on the outer ring can be reduced at a very low cost and a long service life can be achieved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a cross roller bearing as a first embodiment of the present invention.

FIG. 2 is a diagram showing a part of an arrow AA in FIG.

FIG. 3 is a diagram showing a part of a line CC in FIG.

FIG. 4 is a diagram showing a part of a line D-D in FIG.

5 is a diagram showing a part of a line EE in FIG. 2; .

FIG. 6 is a view showing a state in which a part of an outer ring included in a cross roller bearing as a second embodiment of the present invention is viewed from the outer peripheral side.

FIG. 7 is a diagram showing a state in which a part of an outer ring included in a cross roller bearing as a second embodiment of the present invention is viewed from the inner peripheral side.

FIG. 8 is a front view of a conventional cross roller bearing.

9 is a vertical cross-sectional view of the cross roller bearing shown in FIG.

10 is a perspective view of a roller and a separator included in the cross roller bearing shown in FIGS. 8 and 9. FIG.

FIG. 11 is a perspective view of an outer ring included in the cross roller bearing shown in FIGS. 8 and 9.

[Explanation of symbols]

 1 (divided into one place) Outer ring 1a, 2a V-shaped groove 1c Dividing surface 2 Inner ring 3 Roller 11 Recess 12 Filling member

Claims (4)

[Scope of utility model registration request] 1. An outer ring, wherein a V-shaped groove that opens inwardly is formed on the inner peripheral surface along the circumferential direction, and a dividing surface that crosses the V-shaped groove is provided at one location. , An inner ring formed with V-shaped grooves that open outward on the outer peripheral surface along the circumferential direction, and a plurality of adjacent V-shaped grooves so that the rotation axes of adjacent ones intersect with each other. A cross roller bearing assembled by interposing rollers, wherein the parts divided by the dividing surface are joined by a filling member at one position of the width of the dividing surface. bearing. 2. A concave portion for filling the filling member is formed on an outer peripheral surface of the outer ring, and the concave portion intersects with the dividing surface at a substantially central portion thereof, and the intersecting portion or a portion in the vicinity thereof is different. The cross roller bearing according to claim 1, wherein the cross roller bearing is formed to have a width narrower than that of the portion. 3. The cross roller bearing according to claim 1, wherein the filling member is made of synthetic resin. 4. An outer ring having a V-shaped groove, which opens inwardly on the inner peripheral surface, is formed along the circumferential direction, and has one dividing surface in a direction crossing the V-shaped groove. , An inner ring formed with V-shaped grooves that open outward on the outer peripheral surface along the circumferential direction, and a plurality of adjacent V-shaped grooves so that the rotation axes of adjacent ones intersect with each other. A cross roller bearing assembled by interposing rollers, wherein the split surface is
A cross roller bearing, wherein the cross roller bearing is formed so as to intersect with a direction orthogonal to the V-shaped groove at a predetermined angle.