JPH0576151A - Bearing retainer for motor - Google Patents

Abstract

PURPOSE:To prevent a bearing from creeping and a bearing retainer from coming off. CONSTITUTION:When a protrusion of a bearing retainer 4 is inserted into a hole 5 of a bracket 1 followed by insertion of a bearing 3, the bearing retainer 4 is compressed. Since frictional force is generated between the bearing 3 and the bearing retainer 4, the bearing 3 is prevented from creeping and since the protrusion of the bearing retainer 4 is inserted into the hole 5 of the bracket 1, the bearing retainer 41 is prevented from coming off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing retainer for an electric motor, and more particularly to a bearing retainer suitable for preventing bearing creep and preventing the bearing retainer from coming off.

[0002]

2. Description of the Related Art Conventionally, in order to prevent creep and to prevent the bearing retainer from coming off, the bearing and bracket are mechanically fixed from the outside with a screw or the like, but with this, workability is poor and the bearing is damaged. I was worried that the adhesive would get inside the bearing. As a device related to this type, there is, for example, Japanese Utility Model Publication No. 60-160058.

[0003]

The method of holding the bearing of an electric motor is used by inserting a bearing retainer made of an elastic material into a conventional bracket and then inserting a bearing fitted to a rotary shaft into a bearing groove. However, at this time, the electric motor generally has a play of several mm in the thrust direction, and a preload spring is used to kill this play. If a force in the thrust direction is applied to the rotating shaft in this state, there will be some play, and it will move a few mm. At this time, there was a problem that the bearing retainer, which was in contact with the bearing fitted to the rotary shaft, moved together and came off. The present invention is aimed at improving the reliability of preventing creep of the bearing and preventing the bearing retainer from coming off.

[0004]

[Means for Solving the Problems] As a measure for preventing the bearing retainer of an electric motor from coming off, several holes are provided on the outer periphery of the bracket, and a bearing retainer made of an elastic body is inserted into this hole. The side has a shape that goes in and out of the groove into which the bearing is inserted, and in order to further fix the bearing retainer to the bracket,
The bearing retainer has a U-shape. By inserting the bearing fitted to the rotating shaft in this state, frictional force is generated between the bearing and the bearing retainer to prevent creep, and the bearing retainer protrusion is inserted into the bracket hole, so the bearing retainer is retained. Prevention of omission is also achieved.

[0005]

In the bearing structure of the electric motor, several holes are provided on the outer circumference of the bearing portion of the bracket, and the bearing retainer is made of an elastic body. It has a U shape. At this time, the protrusion of the bearing retainer is inserted into the hole of the bracket, and the bearing retainer has a U-shape, so that the bracket is caught and it is difficult to remove. Further, since the bearing side of the bearing retainer comes into contact with the bearing, it is located inside the groove of the bearing portion of the bracket. When the bearing fitted to the rotary shaft is inserted in this state, the bearing side of the bearing retainer is compressed. In this case, even if the bearing moves in the thrust direction, the bearing retainer does not come off, and since the bearing and the bearing retainer are compressed, there is no problem in preventing creep.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a partial sectional view of a bearing structure according to the present invention. Several holes 5 are provided on the outer circumference of the bearing portion of the bracket 1, and the projections 7 of the bearing retainer (1) 4 are inserted into the holes 5 to insert the bearing 3. FIG. 2 is a partial sectional view of the bracket 1. Several holes 5 are provided on the outer periphery of the bearing portion of the bracket 1. Figure 3
Is a bearing retainer (1) 4 according to the present invention. The shape is a U-shape for fixing to the bracket 1 and the projection 7 that enters the hole 5 of the bracket 1. FIG. 4 is a partial sectional view when the bearing retainer (1) 4 is inserted into the hole 5 of the bracket 1. The protrusion 7 of the bearing retainer (1) 4 is inserted into the hole 5 in the bracket 1 and further fixed to the bracket 1, the bearing retainer (1) 4 has a U-shape. I'm stuck in. Generally, an electric motor has a play of several mm in the thrust direction, and a preload spring is used to eliminate the play. However, if a force is applied from the outside in the thrust direction, the preload spring holds the bearing 3 in motion. At this time, the bracket 1 (4) that prevents the creep of the bearing 3 (1) 4 from moving does not move.
Bearings (1) 4 in holes 5 provided on the outer circumference of the bearing part of
Insert the protrusion 7 of. Since the bearing retainer (1) 4 is made of an elastic body, there is no problem in inserting the protrusion 7 of the bearing retainer (1) 4 into the hole of the bracket 1. Bearing support (1)
When the bearing 3 is inserted with the protrusion 7 of No. 4 inserted, the bearing side of the bearing retainer (1) 4 is compressed and a frictional force is generated between the bearing retainer (1) 4 and the bearing 3 to prevent creep. Further, as described above, even if the rotary shaft 2 moves in the thrust direction, the protrusion 7 of the bearing retainer (1) 4 is inserted into the bracket,
It will not come off and will prevent coming off. FIG. 5 is a partial sectional view of a conventional bearing structure. Good for preventing creep, but when the rotating shaft 2 moves in the thrust direction, the bearing retainer (2)
6 moves and is removed. According to the present invention, both creep prevention and slip-out prevention are effective.

[0007]

According to the present invention, if several holes are provided in the outer periphery of the bearing portion of the bracket and the protrusions of the bearing retainer are inserted, the creep can be prevented and the pull-out can be prevented. Therefore, workability is improved and product reliability is increased.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a bearing structure according to the present invention.

FIG. 2 is a partial sectional view of a bracket according to the present invention.

FIG. 3 is a front view and a side view of a bearing retainer according to the present invention.

FIG. 4 is a cross-sectional view in which a bracket and a bearing retainer according to the present invention are inserted.

FIG. 5 is a partial sectional view of a conventional bearing structure.

[Explanation of symbols]

1 ... Bracket, 2 ... Rotating shaft, 3 ... Bearing, 4 ... Bearing retainer (1), 5 ... Hole, 6 ... Bearing retainer (2), 7 ... Protrusion.

Claims (1)

[Claims] 1. In an electric motor in which a groove into which a rotating shaft is fitted is provided on the bottom surface of a bracket and a bearing is pressed by a separate part to prevent creep, the creep of the bearing is prevented and the retainer of the bearing is prevented from coming off. For this reason, several holes are provided on the outer circumference of the bracket bearing, and a bearing retainer made of an elastic body is inserted into the hole.The bearing retainer made of an elastic body then protrudes slightly inside the outer periphery of the bracket bearing. The bearing of an electric motor is characterized by being