JP2539465Y2 - Shell type bearing - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shell-type bearing in which an elastic member externally fitted to an outer ring buffers vibration against an external support.

[0002]

2. Description of the Related Art For example, when a high-speed rotating shaft accommodated in a pipe case is supported like a mower, as shown in FIGS. 5 and 6, an outer ring 3 of a shell-shaped bearing 2 supporting a rotating shaft 1 is provided. An annular elastic member 4 made of rubber is externally fitted and fixed by baking. The elastic member 4 is press-fitted into a pipe case to elastically support the rotating shaft 1, and the rotation of the rotating shaft 1 The vibration is absorbed and buffered by the elastic member 4 so as not to be transmitted to the pipe case.

[0003]

The structure for attaching the elastic member 4 to the conventional shell-type bearing 2 is based on the outer ring 3.
Of the outer ring 3 and the elastic member 4 is not provided with a detent function in the circumferential direction.
When used under the condition of high-speed rotation of 000 to 8000 rpm, there is a problem that a creep phenomenon occurs between the outer ring 3 and the elastic member 4.

Accordingly, the present invention provides a shell-type bearing in which a function of preventing rotation in the circumferential direction is added to a fixed portion between an outer ring and an elastic member, and a creep phenomenon does not occur even when used in a high-speed rotation portion. It is an issue.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a shell-type bearing in which an annular elastic member is externally fitted and fixed to the outer periphery of an outer ring. This adopts a configuration in which a flat portion is provided at a position where the outer fitting is performed.

[0006]

The flat portion is provided on the outer peripheral surface of the outer ring, so that the outer ring and the elastic member fitted and fixed to the outer periphery of the outer ring are prevented from rotating in the circumferential direction by the flat portion. Generation can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the shell-type bearing 11 is
A large number of needle rollers 13 incorporated in the outer race 12 are held at regular intervals by a retainer 14, and an annular elastic member 15 made of rubber or the like is externally fitted and fixed to the outside of the outer race 12. ing.

The shell-type bearing 11 is assembled into a pipe case serving as an outer support in a state in which the elastic member 15 is compressed, and a rotatable shaft 16 located in the pipe case is supported by a group of needle rollers 13. I do.

As shown in FIGS. 3 and 4, flat portions 17, 17 are provided on the outer peripheral surface of the outer ring 12 on both sides of the axis, and are fitted to the outside of the outer ring 12 and fixed by printing. The inner periphery of the elastic member 15 has flat portions 17, 1 as shown in FIG.
The shape conforms to 7.

In the illustrated case, the flat portions 17, 17 are provided over the entire length of the outer race 12 in the axial direction.
Further, the number of flat portions 17, 17 is not limited to the two illustrated portions, but can be set arbitrarily at one or more locations.

The shell-type bearing of the present invention has the above-described structure, and is assembled in a state where the elastic member 15 is compressed in the pipe case, and the rotating shaft 16 is rotatably supported by the group of needle rollers 13 to rotate. The vibration caused by the high speed rotation of the shaft 16 is applied to the elastic member 1.
Absorb and buffer at 5 to prevent transmission to the pipe case.

Flat portions 17, 17 are provided on the outer peripheral surface of the outer ring 12 in the shell-shaped bearing 11, and the elastic member 1
5 is adapted to the flat portions 17 and 17, this portion serves as a detent portion in the circumferential direction of the outer ring 12 and the elastic member 15. Even when the rotating shaft 16 rotates at a high speed, the outer ring 12 and It is possible to reliably prevent a creep phenomenon from occurring between the elastic members 15.

The shell type bearing 11 can be used not only for supporting a rotating shaft in a mowing machine but also as a vibration absorbing bearing for a steering unit or the like.

[0015]

As described above, according to the present invention, since the flat portion is provided on the outer peripheral surface of the outer ring of the shell-type bearing, the outer ring and the elastic member fitted and fixed to the outside thereof are non-rotatable in the circumferential direction. Of the creep between the elastic member and the elastic member can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a shell type bearing according to the present invention.

FIG. 2 is a longitudinal sectional view of the above.

FIG. 3 is a perspective view of an outer ring.

FIG. 4 is a longitudinal side view of the outer race.

FIG. 5 is a longitudinal sectional front view showing a conventional shell-type bearing.

FIG. 6 is a longitudinal sectional side view of the above.

[Explanation of symbols]

 11 shell type bearing 12 outer ring 15 elastic member 17 flat part

Claims (1)

(57) [Scope of request for utility model registration] 1. A shell-type bearing in which an annular elastic member is externally fitted and fixed to the outer periphery of an outer ring, wherein a flat portion is provided at least at a position on the outer peripheral surface of the outer ring where the elastic member is externally fitted and fixed. bearing.