JPS63190532A - Brake motor with pulse encoder - Google Patents

Abstract

PURPOSE:To miniaturize an encoder chamber and make it easy to inspect a braking part by forming said encoder chamber fitted with photoelectric devices and a rotating disc provided with a suitable number of small holes for passing light through its outer peripheral part between the outside face of a bearing bracket and the mounting fixed plate of a disc brake. CONSTITUTION:An encoder chamber 7 is formed between the outside face of a bearing bracket 2 of a motor body 1 and the mounting fixed plate 4 of a disc type electromagnetic brake gear 3. Then, a disc 5 is fastened into the encoder chamber of a motor rotating shaft 8 passing through said parts and the outer peripheral part of said disc is provided with a suitable number of small holes 5a. On the outside face of said bracket 2, three photoelectric devices 6 engaging with the outer peripheral part of the disc 5 for passing light through the small holes 5a are fitted in A, B phases having a circumferential phase difference and in Z phase oscillating 1 pulse by 1 rotation of the disc 5, and a pulse signal is generated according to the number of revolutions of the rotating shaft 8. Thus, it is made easy to inspect a braking part and the encoder chamber 7 is miniaturized by arrangement of said encoder chamber 7 between the motor body 1 and the brake gear 3.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a brake motor with a pulse encoder in which the encoder part is formed compactly and the brake part can be easily inspected. .

[Conventional technology]

In a brake motor equipped with a pulse encoder that detects the amount of rotation of the rotating shaft, a commercially available rotary pulse encoder is generally connected to the tip of the motor rotating shaft that passes through the brake part via a coupling or the like. was.

[Problem that the invention seeks to solve].

This structure not only increases the total length of the motor in the axial direction, but also requires a lot of trouble in the inspection work, as it is necessary to remove the pulse encoder each time the brake section is inspected.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a brake motor with a pulse encoder that has a compact encoder section and allows easy inspection of the brake section.

[Means for solving problems]

In order to achieve the above-mentioned object, this invention provides a motor main body 1.
A small hole 5 is formed between the outer surface of the bearing bracket 2 and the fixing plate 4 to allow light to pass through in the axial direction.
A completely closed encoder chamber 7 is formed, which is equipped with a co-rotating disk 5 provided with an appropriate number of holes 5a and a photoelectric element 6 that transmits light through the small hole 5a.

[Effect]

The amount of rotation of the motor rotation shaft 8 can be detected as the number of pulses by passing the light from the photoelectric element 6 intermittently through the small hole 5a of the rotating disk 5. By using the photoelectric element 6, the encoder chamber 7 can be detected. It can be formed compactly and the total axial length of the motor can be shortened. Furthermore, since the encoder chamber 7 is disposed between the motor body 1 and the brake device 8, the brake section can be inspected easily without removing the encoder section.

〔Example〕

FIG. 1 shows an embodiment of the invention.

This figure shows an external fan-shaped motor, and a fully enclosed encoder chamber 7 is formed between the outer surface of the bearing bracket 2 of the motor body 1 and a fixed plate 4 for mounting the disc-shaped electromagnetic brake device 3. An outer fan 9 is fixed to the tip of a motor rotating shaft 8 that passes through the motor. An outer fan cover 10 that surrounds this outer fan 9
is attached to the outer periphery of the bracket 2. A disk 5 is fixed to the position in the encoder chamber during the rotation 411t18, and an appropriate number of small holes 5a are provided on the outer periphery of the disk 5 to allow light to pass through in the axial direction, as shown in FIG. ing. The small hole 5a can also be a radial slit formed by cutting out the outer circumference of the disk 5. .

As shown in an enlarged view in FIG. 3, on the outer surface of the bracket 2, a charging element 6 that engages with the outer periphery of the disk 5 and transmits light into the small hole 5a is electrically positioned at 90 degrees in the circumferential direction. A with phase difference
Eight 2-phase elements are installed, each of which emits one pulse when the disk 5 rotates once. When the disk 5 rotates, the photoelectric element 6 intermittently passes light through the small hole 5a, thereby controlling the rotation of the rotating shaft 8. It is designed to generate a Tahalus signal depending on the amount.

The photoelectric element 6 makes the en:I-da chamber 7 a completely closed structure.
This is to prevent dust, etc. from entering the area from the outside.

If the brake device 3 is used for a long period of time, the brake lining 11
is worn out, so the clearance g between the fixed core 12 and the movable core 13
However, according to the embodiment described above, the encoder chamber 7 is disposed between the motor body 1 and the brake device 3, so inspection of the brake section and clearance g can be carried out without removing the encoder section. Adjustment work etc. can be easily performed.

Furthermore, the use of the photoelectric element 6 allows the encoder chamber 7 to be formed compactly, thereby reducing the total length of the motor in the axial direction.

〔Effect of the invention〕

According to this invention, in the brake motor with a pulse encoder, the mounting of the disk brake device and the outer surface of the bearing bracket of the motor body is performed using a rotating disk having an appropriate number of small holes for passing light on the outer periphery between the fixed plate and the outer surface of the bearing bracket of the motor body. Since the encoder chamber is formed with a photoelectric element that allows light to pass through the small hole, the encoder chamber can be formed compactly, the overall length of the motor can be shortened, and the brake section can be inspected easily. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of the present invention, FIG. 2 is a side view of the encoder section of FIG. 1, and FIG. 8 is an enlarged longitudinal sectional view of the photoelectric element section of FIG. 1. 1...Motor body, 2...Bracket, 3...Brake device, 4...Fixing plate for installation, 5...Disc plate, 5
a... Small hole, 6... Photoelectric element, 7... Encoder chamber, 8... Rotating shaft. 7.94□31! -t LIJ '05 ("2 what,
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Claims (1)

[Claims] 1) In a brake motor with a pulse encoder in which a disk brake device is provided outside a bearing bracket of the motor body, a fully enclosed encoder chamber is formed by the bracket and a mounting fixing plate of the brake device, and the encoder chamber is penetrated through these. A disk is fixed to a position in the encoder chamber of the motor rotation shaft, and an appropriate number of small holes are provided on the outer circumference of this disk through which light can pass in the axial direction, and the holes are engaged with the outer circumference of this disk. A brake motor with a pulse encoder, characterized in that a photoelectric element that transmits light is attached to a bracket.