JPS5937862A - Mounting method for pulley of small-sized motor - Google Patents

Abstract

PURPOSE:To enhance the dimensional accuracy of a small-sized motor by lifting a motor to the prescribed position by an elevationally movable table, fixing the motor, then chucking the rotational shaft of the motor, and press-fitting a pulley from above the rotational shaft, thereby preventing the bearings, mounting plate for the bearings from damaging. CONSTITUTION:A pulley P is associated at the end of a rotational shaft S of a motor M, and set on a motor lifting block 18. Then, the block 18 is raised, and the case 22 of the motor M is contacted with a stopper 21. Subsequently, the shaft S is chucked by a motor rotational shaft chuck unit 23, a punch 14 is lifted by a press-fitting cylinder 12, and the pulley P is pressed by the punch 14. When the punch 14 is contacted with the punch stopper 24 of the stopper 21, the press-fitting is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for mounting a small motor for use in tape recorders and the like.

Generally, to attach a pulley to the rotating shaft of a small motor with an electronic government, as shown in Fig. 1, the motor (M) is set at a predetermined position on the table 00 of a hand press machine, and the pulley (P) is set to the motor rotation nl[S]. ) and then pull the lever (3υ in the direction of arrow CD) to attach the ship punch (3
2) descends and starts press-fitting, and the stopper (33)
34), the press-fit was photonized.

By the way, in the conventional method, the rotation axis (
If a load is applied to the bearing 05) of S), the bearing (35) may be damaged.Due to the deflection of the scale or the bearing plate (36), the dimension (A) between the motor body and the top of the pulley may be damaged. However, it has the disadvantage that it is difficult to reduce the distance (B) between the motor body and the lower end of the freewheel to less than 1 mm. Ta.

In view of the above-mentioned points, the present invention provides a motor bearing (35) and bearing scattering plate (06) which are press-fitted without applying any load, and which have good dimensional accuracy.

An embodiment of the present invention will be described below with reference to the drawings.

Figure 3 shows a motor pulley mounting jig used in the pickup method of the present invention, which is mounted on a base (1) and a post (2).
, (3) are press-fitted with screws, and these two hosts (
A slide plate (4) is set that slides up and down using 2) and (3) as guides. This slide board (4
) and boss) (2) and (3) are guided by two linear motion bearings (5) and (6). Also, host (2).

The cylinder mounting plate (7) is attached to the upper end of (3) with a washer (
8).

(9) and screws (10) and (II),
Attach the press-fit cylinder (1) to the center of the cylinder mounting plate (7).
2) is fixed and its cylinder rod end is jointed (
13) is connected to the system slide plate (4). An entry/exit punch (14) having a stopper is attached to the central lower surface of the slide plate (4). Note that air is connected to the press-fitting cylinder (12) so that the cylinder is initially drawn into the upper part. The above constitutes the press-fitting mechanism section.

Next, to explain the mechanism of the motor push-up, the base (1)
A cylinder α7) is screwed on the same axis as the press-fitting cylinder (12) and the press-fitting punch (14), and this cylinder is attached to the table in the initial state. Air is connected so that the motor push-up block is in the lowered state. The push-up cylinder (17) has an overstroke absorbing spring (19) at the end of the cylinder, and the motor push-up block (18) is an extra edition. This push up is caused by the flock (18) being forced into the guide hole of the base (1) and sliding up and down. The height of the spacer block C?0) is slightly higher than the height of the motor case (22), and the stopper block is installed parallel to the base (1) and the height of the motor (to)). The chuck part (23) and punch stopper part 04) of the rotating shaft (S) are hardened to 5K81)4RC58°. On the slide side, a cylinder mounting plate (25) is screwed perpendicularly to the base (1), and parallel to this is a shaft chuck cylinder (c26).

This cylinder (26) is in the initial state and is on the retraction side.
The air is connected so that Further, at the tip of this cylinder (26), a shaft checker (27) is attached on the same plane as the stopper (stopper) and on the rotation axis.

Next, the reprint method will be explained with reference to FIGS. 3 and 4. First, attach a wheelie (P) to the tip of the rotating shaft (S) of the motor (M).
, and set the motor pusher on the block (18). Next, move the push-up cylinder rod (17) with the arrow (
4) direction to absorb the maeber stroke.
While compressing the motor (19), the motor lifts up the flock (18) and the motor case (22) is pushed up.
- Push up until it hits (21). Next, the shaft chuck cylinder (26) is actuated to move the iron in the direction of arrow (B). Therefore Rondo or Shaft Chutka C27
) and chuck the rotating shaft (S) of the motor CM) with the motor rotating shaft chuck part (3) of the stopper (21). Next, the press-fitting cylinder (12) is indicated by the arrow (C1
It operates in the force direction and the force is applied to the join l () slide plate (4)
The punch (14) is pressed through the button, and the punch (14) presses the button IJ-(P). The punch (14) completes press-fitting by hitting the stopper (2 punch horns < 14). After the press-fitting is completed, remove the press-fitting cylinder (02), the punch (14) returns to its initial state, and then release the shaft chuck cylinder (26) to release the chuck on the rotating shaft (S1) of the motor (2). Then, the motor push-up cylinder (17) is released, and the motor power drops down to complete the entire process.

As shown above, the present invention involves pushing the motor up and fixing it in a predetermined position using a vertically movable foo-foil, then chucking the rotary shaft of the oil recorder, and then inserting the pulley from above the tp + rotary shaft. Since it was press-fitted, the 4111 receiver is used as before.
There are effects such as being able to provide a bearing with a long life and good dimensional accuracy without damaging the bearing plate.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional hand press used for H-type insertion, Figure 2 is a cross-sectional side view of a general short-temperature cover motor, and Figures 3 and 4 are examples of the present invention. , 3rd
The figure shows the part u'l+ of the Hooley press-in jig before the Hooley reprint.
Side 101 and Figure 4 are partial sections 1t1 showing the middle of the operation.
This is a + side view. CM)...Motor (S)...Rotating shaft (P)...Pulley

Claims (1)

[Claims] In the method of attaching a pulley to the rotating shaft of a motor that supports the rotating shaft, the motor is pushed up and fixed in a predetermined position using a table that can move vertically, and then the rotating shaft of the motor is chucked, and then A method for attaching a pulley to a small motor, which is characterized by press-fitting the pulley above the rotating shaft.