JPS62127511A - Slide rotary bearing - Google Patents

Abstract

PURPOSE:To secure such a bearing that is capable of receiving rectilinear motion and rotational motion, by installing a live ball holding inner cylinder for rectilinear motion, a holding outer cylinder of a relief ball part and a roller member, an inner ring body between both inner and outer cylinders, and an outer ring body on an outer circumference of the outer cylinder, and constituting them with an annular ball row turning up side member. CONSTITUTION:A holding hole 5 for a live ball part 4 of an annular ball row 2 is formed in a holding inner cylinder 3 while a through hole 11 receiving rectilinear motion of a shaft 1 and holding a holding groove 9 of a relief ball part 8 and a roller member 10 is formed in a holding outer cylinder 7. And, an inner ring body 12 is installed between the holding inner cylinder 3 and the holding outer cylinder 7 while an outer ring body 13 is installed on an outer circumference of the holding outer cylinder 7 rotatably. In addition, a U-shaped turnup part 15 of the annular ball row 2 and a positioning pin both are installed in an inner surface of a side member 14. Therefore, the rectilinear motion of the shaft 1 is supportable with the live ball part 4 and the rotational motion is supportable with the roller member 10 through bearings so that the whole structure is miniaturizable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sliding rotary bearing capable of receiving rotational and linear motion.

[Conventional technology]

Conventionally, this type of slide rotary bearing has not been well known, and a composite structure of ball, roller bearings, and slide bearings has been adopted.

[Problem that the invention seeks to solve]

However, due to recent automated design, there is a strong demand for its widespread use, as it is an essential mechanical element for bearings in robot arms, for example.

[Means for solving problems]

The present invention aims to satisfy these demands, and its gist is a bearing capable of receiving rotational motion and linear motion, which guides the linear motion by contacting the outer peripheral surface of a shaft member to be supported. an inner holding cylinder having holding holes for holding the active pole parts of the plurality of annular ball rows; a holding groove for holding the escape ball parts of the annular ball rows; and a sliding holding outer cylinder having through holes for holding the roller members. , an inner ring body rotatably interposed between the holding inner cylinder and the holding outer cylinder, an outer ring body rotatably provided on the outer periphery of the holding outer cylinder, and folding of both ends of the annular ball row. and a side member having a folded groove for holding the part.

[Effect]

The bearing action for linear motion is performed by the annular ball array, and the bearing action for rotational motion is performed by the roller members.

〔Example〕

1 to 4 show preferred embodiments of the present invention;
3 to 3 show the first embodiment, and FIG. 4 shows the second embodiment.

In the first embodiment shown in FIGS. 1 to 3, 1 is a shaft member to be supported, and 2 is a plurality of annular ball rows, in which six sets are used.

3 is a holding inner cylinder, and the holding inner cylinder 3 has an annular ball row 2.
5 or 6 holding holes 5 or 6 are formed to hold the active pole part 4, and the inner opening of the holding hole 5 is smaller than the outer diameter of the pole 6 so that the pole 6 does not come off, and the pole 6 comes into contact with the shaft member 1. This is a possible shape.

7 is a holding outer cylinder, and the holding outer cylinder 7 has an annular ball row 2.
Six holding grooves 9 for holding the relief pole portion 8 and six through holes 11 for holding the roller member IO are formed.

12 is an inner ring body, and the inner ring body 12 is rotatably interposed between the holding inner cylinder 3 and the holding outer cylinder 7.

Reference numeral 13 denotes an outer ring body, which is rotatably provided on the outer periphery of the holding outer cylinder 7.

Reference numeral 14 denotes a pair of side members, and the inner surface of the side member 14 is formed with a U-shaped folding groove I6 for holding the folded portion 15 of the original hole row 2, and the inner surface of the side member 14 has several grooves. The positioning pin 17 is protruded, and the holding inner cylinder 3 and the holding outer cylinder 7 are provided with a positioning hole 18 that fits into the positioning pin 17. By fitting the positioning pin 17 and the positioning hole 18, the holding hole 5, the holding groove 9 and The folding groove 16 is positioned, the holding inner cylinder 3 and the holding outer cylinder 7 are integrated, and a retaining ring 19 is fitted to the inner peripheral surface of the outer ring body 13 to stop both side members 14.

Since this first embodiment has the above-mentioned configuration, for example, when the shaft member l moves linearly, the annular ball row 2 can be rotated and supported by the live ball portion 4, and when the shaft member l moves rotationally, it can be supported by the roller members 10. The inner ring body 12 can be rotated with respect to the holding inner cylinder 3 and the holding outer cylinder 7, so that the inner ring body 12 can be rotated with respect to the holding inner cylinder 3 and the holding outer cylinder 7. Bearing action can be performed smoothly.

The second embodiment shown in FIG. 4 shows a structure in which the roller member 10 is arranged on the same line as the live ball part 4, and the escape ball part 8 is shifted laterally.

In this second embodiment as well, the same effects as in the first embodiment can be obtained, and the radial load applied to the live ball portion 4 is transferred to the roller member 10 in the same line through the inner ring body 12.
It can be received by

Note that similar effects can be obtained when the outer ring body 13 moves linearly and rotationally.

Further, in this embodiment, the positioning pin 17 is used to integrate the holding inner cylinder 3 and the holding outer cylinder 7, but other coupling structures can be applied. 3,
The holding outer cylinder 7 may be integrally formed by plastic molding.

Further, the number of the annular ball rows 2 and the roller members 1o is variably designed depending on the desired load capacity. There are also cases where you can place

〔Effect of the invention〕

As described above, for example, when the shaft member linearly interlocks, the annular ball array can be supported by the active pole part while circulating, and when the material rotates on the shaft, it can be supported by the roller member, so that the shaft member can perform linear and rotational motion. In particular, since the inner ring body is rotatable relative to the holding inner cylinder and the holding outer cylinder, the bearing action by the annular ball array and roller members can be performed in a circular and bone manner.

With the above, the intended purpose can be fully achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of the first embodiment, and FIG. 2 is an exploded perspective view of the first embodiment. 3 is a cross-sectional view thereof, and FIG. 4 is a cross-sectional view of the second embodiment. L... Shaft member, 2... Annular ball 7 (1, 3... Holding inner cylinder, 4... Live ball part, 5... Holding hole, 7... Holding outer cylinder, 8... Relief ball part, 9 ...Retaining groove, lO...Roller member, 11...Through hole, [2...Inner ring body,] 3...Outer ring body, 14...Side member, 15...Folding part, 16...Folding groove. 2/9A Book /75 2

Claims (1)

[Claims] A bearing capable of receiving rotational motion and linear motion,
A holding inner cylinder having a holding hole that holds the active ball portions of a plurality of annular ball rows that contact the outer circumferential surface of the shaft member to be supported and guide the linear motion, and a holder that holds the relief ball portions of the annular ball rows. A holding outer cylinder having a groove and a through hole for holding a roller member, an inner ring body rotatably interposed between the holding inner cylinder and the holding outer cylinder, and a rotatably provided on the outer periphery of the holding outer cylinder. 1. A slide rotary bearing comprising: a circular outer ring body; and a side member having folded grooves for holding folded portions at both ends of the annular ball row.