JPH08232948A - Shell type roller bearing - Google Patents

Abstract

PURPOSE: To reduce the cost, and to efficiently assemble by providing the fixing function to a roller bearing to be fitted to an eccentric shaft or the like of a motor to drive a hydraulic pressure generating unit to dispense with a conventional stop ring necessary to prevent the movement in the thrust direction. CONSTITUTION: In a roller bearing where a roller 12 is interposed between an inner ring shell 10 and an outer ring shell 11, the inner end of the inner ring shell 10 is outwardly bent to form an inner end flange 14, and the outer end of the outer ring shell 11 is inwardly bent to form an outer end flange 16. A bent edge 18 obtained by inwardly bending the inner end of the outer ring shell 11 is engaged with the inner end flange 14 of the inner ring shell 10, the outer end of the inner ring shell 10 is outwardly projected from the outer end flange 16 of the outer ring shell 11, and the outer end face of the inner ring shell 10 is pressed to be press-fitted to an eccentric shaft 22 of a motor to drive the hydraulic unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shell type roller bearing and a hydraulic unit driving motor using the same.

[0002]

2. Description of the Related Art As shown in FIG. 2, a hydraulic motor for driving a hydraulic pressure generating unit in an automobile brake device is provided with an eccentric shaft 3 at one end of a main shaft 2 of a motor body 1 and a roller inserted in the eccentric shaft 3. An inner retaining ring 5 and an outer retaining ring 6 are press-fitted into both ends of the bearing 4, and the retaining rings 5 and 6 prevent the roller bearing 4 from moving in the thrust direction.

Reference numeral 7 in the drawing denotes a plunger of a hydraulic pressure generating unit.

[0004]

According to the conventional structure as described above, the inner ring retaining ring 5 is press-fitted, the roller bearing 4 is attached, and the outer ring retaining ring 6 is press-fitted. There are many processes and work efficiency is poor. Further, since the constituent members are three members, there is a disadvantage that the cost increases and the space factor increases.

Therefore, the present invention provides a shell type roller bearing which is an improvement of the above roller bearing and can be mounted without using a snap ring, and an oil pressure generating unit drive motor using this bearing. With the goal.

[0006]

A shell type roller bearing for achieving the above object is a shell type roller bearing in which rollers are interposed between an inner ring shell and an outer ring shell, and the inner end of the inner ring shell is directed outward. To form an inner end flange, bend the outer end of the outer ring shell inward to form an outer end flange, and bend the inner end of the outer ring shell inward to form a bent edge. The outer ring of the inner ring shell is superposed on the outer side of the inner ring flange of the inner ring shell, and the outer end of the inner ring shell is projected more outward than the outer ring flange of the outer ring shell.

In order to achieve the above object, a hydraulic pressure generating unit drive motor has an eccentric shaft provided at one end of a main shaft, and an inner ring shell of the shell type roller bearing whose inner end flange faces the motor body side. It is configured by press fitting.

[0008]

When the above-mentioned shell type roller bearing is press-fitted into the eccentric shaft of the hydraulic unit drive motor, a tool is pressed against the outer end of the inner ring shell projecting outward from the outer end flange of the outer ring shell. The inner ring shell that receives the force is of a non-separable type because the inner end flange engages with the bent edge of the outer ring shell, and therefore the force input is also applied to the outer ring shell, and the inner and outer ring shells and the intervening between them. The rolled rollers move as a unit and are pressed into the eccentric shaft.

[0009]

1 (a) and 1 (b), the shell type roller bearing of the embodiment is used for a hydraulic pressure generating unit drive motor of the embodiment.

The shell type roller bearing comprises an inner ring shell 10, an outer ring shell 11 and rollers 12 interposed therebetween. Although the rollers 12 are shown as full-roller type in the illustrated case, they may be of a type in which they are held at regular intervals by a cage.

The inner ring shell 10 is formed by press-forming an inner end flange 14 on the inner end of a cylindrical body 13, and the rollers 12 are guided by the inner end flange 14 to guide the outer surface of the cylindrical body 13. Roll over.

The outer ring shell 11 is formed by forming an inwardly facing outer end flange 16 on the outer end of a cylindrical body 15 by pressing, and the rollers 12 are guided by the outer end flange 16 so as to be on the inner diameter surface of the cylindrical body 15. To roll.

The inner end of the outer ring shell 11 is bent inward, and the bent edge 18 is formed on the inner end flange 1 of the inner ring shell 10.
The inner and outer ring shells 10 and 11 are joined to each other in a non-separated state by caulking on the outside of 4.

In the state of being coupled in the non-separated state as described above, the outer end of the cylindrical body 13 of the inner ring shell 10 is shown in FIG.
As shown in (b), the outer end flange 16 of the outer ring shell 11
It is formed so as to project outward by a smaller distance α.

The shell type roller bearing described above is used in the motor body 2
It is press-fitted into an eccentric shaft 22 provided at one end of a main shaft 21 of 0. That is, in the roller bearing, the inner end flange 14 of the inner ring shell 10 is directed toward the main shaft 21 side, and the inner ring shell 10 is press-fitted into the eccentric shaft 22. At the time of press-fitting, a tool is pressed against the outer end surface of the inner ring shell 10 and pushed in (see arrow a).

As described above, the outer end surface of the inner ring shell 10 is
Since it projects from the outer end flange 16 of the outer ring shell 11 by a minute distance α, the tool does not hit the outer ring shell 11 and only the inner ring shell 10 is pushed. Since the inner ring flange 10 of the inner ring shell 10 is engaged and coupled to the inside of the bent edge 18 of the outer ring shell 11, the inner ring shell 10 and the outer ring shell 11 and the rollers 12 interposed therebetween are integrally formed. It moves and is press-fitted. Therefore, the eccentric shaft 22 is fixed to the eccentric shaft 22 without using the retaining rings 5, 6 (see FIG. 2) as in the related art.

The plunger 23 of the hydraulic pressure generating unit is brought into contact with the outer diameter surface of the outer ring shell 11 as shown by the chain line in FIG. When the motor is driven, the eccentric shaft 22 rotates eccentrically together with the roller bearing, so that the plunger 23 moves up and down to generate hydraulic pressure.

Since the plunger 23 comes into contact with the outer diameter surface of the outer ring shell 11 as described above, it is desirable to make the plate thickness thicker than that of the inner ring shell 10 to enhance the strength.

[0019]

As described above, the shell type roller bearing of the present invention and the hydraulic pressure generating unit drive motor using the same are
Since the roller bearing can be independently fixed to the shaft without using a pair of retaining rings that have been conventionally used, the number of constituent members can be reduced and the cost can be reduced. Can be miniaturized.

Further, since the outer end of the inner ring shell projects outward from the outer end flange of the outer ring shell, only the inner ring shell can be pressed without touching the outer ring.

Further, since the inner end flange of the inner ring shell is joined in a non-separated state by the bent edge of the outer ring shell,
The assembly can be completed in one step of simply pressing the outer end of the inner ring shell and press-fitting it.

[Brief description of drawings]

FIG. 1A is a sectional view of an embodiment. FIG. 1B is a partially enlarged sectional view of the same.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 10 Inner Ring Shell 11 Outer Ring Shell 12 Roller 13 Cylindrical Body 14 Inner End Flange 15 Cylindrical Body 16 Outer End Flange 18 Bending Edge 20 Motor Body 21 Spindle 22 Eccentric Shaft 23 Plunger

Claims (2)

[Claims] 1. A shell type roller bearing having rollers interposed between an inner ring shell and an outer ring shell, wherein an inner end of the inner ring shell is bent outward to form an inner end flange, and
The outer end of the outer ring shell is bent inward to form an outer end flange, and the bent edge provided by bending the inner end of the outer ring shell inward is overlapped on the outer side of the inner end flange of the inner ring shell, A shell-type roller bearing, wherein the outer end of the inner ring shell is projected outward from the outer ring flange of the outer ring shell. 2. A hydraulic unit drive motor having an eccentric shaft provided at one end of a main shaft, wherein the eccentric shaft has an inner ring shell of the shell roller bearing according to claim 1, and an inner end flange of the inner ring shell facing the main shaft side. A hydraulic generation unit drive motor characterized by being press-fitted.