JP2604361Y2 - Brushless DC motor encoder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless DC motor encoder. New improvement for fixing to

[0002]

2. Description of the Related Art Conventionally, a brushless DC motor encoder of this type which has been used is generally mounted on a device only through a mounting screw hole formed in a front lid on the motor side.

[0003]

[Problems to be Solved by the Invention] Conventional Brushless DC
Since the motor encoder is configured as described above, there are the following problems. That is, since the structure for mounting the motor encoder is of a cantilever type, the structure to be mounted has poor stability when the structure to be mounted is rotated or the like, and a means for winding and fixing a band around the outer periphery of the motor is also used. It was not suitable for mounting in a narrow space.

The present invention has been made to solve the above-mentioned problems, and in particular, a motor encoder is provided through a mounting screw hole formed in a front cover of a motor and a constricted portion formed in a rear cover. An object of the present invention is to provide a brushless DC motor encoder that is securely fixed to another device.

[0005]

SUMMARY OF THE INVENTION A brushless DC motor encoder according to the present invention includes a front lid and a rear lid provided on a casing and each having a bearing, a mounting screw hole provided on the front lid, and a rotation provided on each of the bearings. Freely provided, a rotor having a rotating shaft, a constricted portion provided on a small diameter portion of the rear lid and having a smaller diameter than the outer diameter of the casing, an optical element provided on the rear lid, An extension shaft portion of the rotating shaft that penetrates the opening of the rear cover, a rotation code plate provided on the extension shaft portion, and an encoder cover body provided on the rear cover and provided to cover the rotation code plate And on the back lid
The connection board provided and the flags connected to the connection board are provided.
And a connection cable .

[0006]

[0007]

In the brushless DC motor encoder according to the present invention, the motor encoder is securely fixed because it is mounted on another device by using the mounting screw holes provided in the front lid and the constriction provided in the rear lid.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the C motor encoder will be described in detail. In FIG. 1, a motor denoted by reference numeral 1 is a brushless DC motor, and an encoder 2 is connected to the motor 1 via a coupling screw 3.

As shown in FIG. 4, the motor 1 includes a cylindrical casing 4, a front lid 5 and a rear lid 6 fixed to both ends of the casing 4, and a casing 4 formed on the rear lid 6. A constricted portion 6A having a diameter smaller than the outer diameter of the bearings, bearings 7 and 8 provided on the lids 5 and 6, a rotating shaft 10 rotatably provided on the bearings 7 and 8, and having a rotor 9; An extended shaft portion 10 a formed on the rotating shaft 10 and penetrating the opening 6 a of the rear cover 6, and a stator 11 provided in the casing 4 and corresponding to the rotor 9 are provided.

The encoder 2 includes an optical element 12 such as a light emitting and receiving device provided on the rear lid 6 and a rotary code plate 13 provided on the extension shaft 10a and formed of a slit or a pattern.
An encoder cover 14 provided on the rear cover 6 for covering the rotary code plate 13, a connection board 15 provided on the rear code 6, and a flat cable 16 connected to the connection board 15. It is configured.

The above-mentioned optical element 12 is provided with the rotation code plate 1.
If it is a reflection type, it will be a light emitting and receiving body, and if it is a transmission type, it will be a light emitting or light receiving body.

Next, an actual mounting method will be described. First, another device (not shown) is inserted into the mounting screw hole 5A of the good lid 5.
Are fixed via screws, and the mounting pieces 20 and 21 having a pair of semicircular concave portions 20a and 21a are brought into contact with the outer periphery of the constricted portion 6A. The encoder 2 is firmly fixed by sandwiching the portion 6A. Therefore, the mounting screw hole 5A of the front lid 5 described above.
By using the constricted portion 6A, the entire motor encoder can be held from both ends. Stable mounting on other devices can be achieved.

[0013]

Effects of the Invention The brushless DC motor encoder according to the present invention has the above-described structure, and therefore can provide the following effects. That is, since the motor encoder is mounted on another device or the like via the mounting screw hole formed on the front lid of the motor and the constricted portion formed on the rear lid, the mounting of the motor encoder itself is stabilized and the mounting structure of the device is formed. The reliability can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a brushless DC motor encoder according to the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a sectional view of FIG.

FIG. 5 is a configuration diagram showing a mounting structure.

[Explanation of symbols]

 Reference Signs List 4 Casing 5 Front lid 5A Mounting screw hole 6 Rear lid 6A Constriction 6a Opening 7,8 Bearing 9 Rotor 10 Rotating shaft 10a Extended shaft 12 Optical element 13 Code plate 14 Encoder cover 15 Connection board 16 Flat cable

Claims (1)

(57) [Scope of request for utility model registration] A bearing (7, 8) provided on a casing (4).
A front lid (5) and a rear lid (6) having a mounting screw hole (5A) provided in the front lid (5); and a rotatable shaft provided on each of the bearings (7, 8). A rotor having (10), the rear lid (6)
A constricted portion (6A) having a smaller diameter than the outer diameter of the casing (4), an optical element (12) provided on the rear lid (6), and an opening of the rear lid (6). (6a) penetrating the extension shaft part (10a) of the rotating shaft (10), the rotation sign plate (13) provided on the extension shaft part (10a), the rear lid (6) provided on the rear lid (6) An encoder cover body (14) provided to cover the rotation code plate (13), and a connection board (15) provided on the rear lid (6).
And a flat cable (1) connected to the connection board (15).
6) A brushless DC motor encoder characterized by comprising: