JPH09322475A - Motor with brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor whose wire connection part can be arranged at the position to be small-sized even a motor whose the connection part of a lead wire lead out of an electromagnetic brake device and electric wiring drawn into a motor case is housed. SOLUTION: A motor 1 is composed of a motor case 80 which consists of a core holder 204, a 1st frame 60 and a 2nd frame 70, a rotor 10, a stator 20 and an electromagnetic brake device 30 which brakes the rotor 10. A recess 704a is formed in the inner wall surface of the 2nd frame 70 which touches the electromagnetic brake device 30 and the connection part 504 of the lead wire of the electromagnetic brake device 30 and an electric wiring 501 for the electromagnetic brake device 30 is housed in the recess 704a (space 35).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor with a brake in which an electromagnetic brake device for braking a rotor is built in a motor case. More specifically, the present invention relates to a wiring arrangement structure for an electromagnetic brake device in a motor case.

[0002]

2. Description of the Related Art Among various motors, as shown in FIG. 4, a motor with a brake, in which an electromagnetic brake device for braking a rotor is built in a motor case, is provided in a motor case 80 along its axial direction. In many cases, the stator 20 and the electromagnetic brake device 30 that brakes the rotor 10 are arranged. In the motor 2 as described above, the rotating shaft 101 of the rotor 10 is rotatably supported by the first frame 60 and the second frame 70 forming the both end surfaces of the motor case 80, and the rotating shaft 101 rotates integrally with the rotating shaft 101. The electromagnetic brake device 30 brakes the rotor 10 by sandwiching the rotating disk 303 between the plate 304 and the movable plate 302. A wiring hole 705 is formed in the motor case 80, and an electric wiring 502 for feeding power to the stator 20 and an electric wiring 501 to the electromagnetic brake device 30 are drawn from this hole. Here, since the connecting portion 504 between the lead wire 305 drawn from the electromagnetic brake device 30 and the electric wire 501 drawn into the motor case 80 is subjected to an insulation treatment such as covering with an insulating tube, Since it is relatively large, a gap B having a predetermined size is secured between the stator 20 and the electromagnetic brake device 30, and the wire connection portion 504 is arranged there.

[0003]

However, in the conventional structure in which the connecting portion 504 between the lead wire 305 of the electromagnetic brake device 30 and the electric wiring 501 is arranged between the stator 20 and the electromagnetic brake device 30. , Connection part 50
It is necessary to protect the insulating tube and the like covering 4 from the heat generated by the stator 20. For this reason, it is necessary to secure a wide gap B for arranging the connection portion 504.
There is a problem that the motor cannot be downsized. Also,
The movable plate 302 of the electromagnetic brake device 30 is connected to the lead wire 305.
There is also a problem in that a wide gap B must be secured from the viewpoint of drawing the lead wire 305 largely so as not to touch, and the motor cannot be downsized.

Therefore, an object of the present invention is to solve such a problem, and the connecting portion between the lead wire from the electromagnetic brake device and the electric wiring drawn into the motor case is housed in the motor case. It is an object of the present invention to provide a motor with a brake in which a wire connection portion can be arranged at a position where the size of the motor can be reduced even if the motor is of the type described above.

[0005]

In order to solve the above problems, according to the present invention, a stator and an electromagnetic brake device for braking a rotor are arranged in a motor case along an axial direction thereof. In a motor with a brake in which a connecting portion between a lead wire from a device and an electric wire drawn into the motor case is housed in the motor case, the connecting portion is opposite to the stator with respect to the electromagnetic brake device. It is characterized in that it is housed in a space formed between the electromagnetic brake device and the end surface portion of the motor case on the side.

In the present invention, since the connecting portion between the lead wire from the electromagnetic brake device and the electric wiring drawn into the motor case is arranged on the side opposite to the stator, the insulating tube covered with this connecting portion is , Does not receive heat from the stator. For this reason, a narrow space is sufficient for arranging the connection portion. In the electromagnetic brake device, the movable plate is
Normally, it is located near the stator.Therefore, if the connection between the lead wire from the electromagnetic brake device and the electrical wiring drawn into the motor case is placed on the opposite side of the stator, the lead wire will Since the movable plate of the brake device is not touched, a narrow space is sufficient for arranging the connection part even from this point. Therefore, even a motor of the type in which the connecting portion between the lead wire from the electromagnetic brake device and the electric wiring drawn into the motor case is housed in the motor case can be downsized.

In the present invention, it is preferable that a recess is formed in an end surface portion of the motor case located on the electromagnetic brake device side, and the recess forms a space for accommodating the connection portion. According to this structure, even if there is no gap between the electromagnetic brake device and the end surface portion of the motor case, the connection portion can be housed in the recess (space) formed in the end surface portion, so that the brake motor can be miniaturized most. .

[0008]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a view showing a motor with a brake of the present invention, and FIG. 2 is a perspective view in which a part of an electromagnetic brake device is shown in section.

(Overall Structure of Motor) As shown in FIG.
The motor 1 with a brake of this example includes a motor case 80 that is an exterior of the motor, a rotor 10, and a rotor 10 that generates a magnetic field.
It is generally composed of a stator 20 that applies a driving force to the rotor, and an electromagnetic brake device 30 that brakes the rotor 10.

The motor case 80 has a cylindrical core holder 204 which is open at both ends, and a first core screw which is fixed to the core holder 204 by a screw 703 so as to close both ends.
Frame 60 and second frame 70. First frame 60 and second frame 7
Reference numeral 0 is made of aluminum die cast or the like, and rotary bearings 401 and 402 are fitted in the center thereof. An encoder case 90 is fixed to the motor case 80 so as to cover the second frame 70. In the encoder case 90, a magnetic type having a magnetic drum in which magnetic signals are magnetized and recorded in the circumferential direction, and a magnetic sensor arranged to face the circumferential surface of the magnetic drum with a predetermined gap therebetween. An encoder (not shown) is provided.

The rotor 10 includes rotary bearings 401, 40 held by the first frame 60 and the second frame 70.
The rotary shaft 101 is supported by the rotary shaft 101 and the rotor magnet 102 is provided on the outer circumference of the rotary shaft 101. The output shaft side 101a of the rotary shaft 101 passes through the rotary bearing 401 and projects from the first frame 60. Further, the base end side 101b of the rotary shaft 101 protrudes from the second frame 70 into the encoder case 90 through the rotary bearing 402, and the magnetic drum of the magnetic encoder is fixed to the base end 101b. It will be.

The stator 20 comprises a stator core 201 fixed to the inner peripheral surface of a core holder 204, and a stator core 2
It is composed of a winding 202 wound around 01. One end of the stator 20 is fitted in a recess formed in the inner wall surface of the first frame 60, and the other end of the printed circuit board 2 is connected to the end of the winding 202 by wiring.
03 is attached.

(Structure of Electromagnetic Brake Device) In the brake-equipped motor 1 of the present embodiment, inside the motor case 80,
In a state where the stator 20 and the electromagnetic brake device 30 are arranged along the axial direction, the electromagnetic brake device 30 has a substantially donut shape having a hole through which the rotary shaft 101 is inserted, as shown in FIG. . Electromagnetic brake device 30
Is a yoke 3 having a hole formed in the end surface on the stator 20 side.
01, and a spring 306 is mounted in the hole. The coil 309 is provided at a position adjacent to the spring 306.
Is built-in. A plate 304 is fixed to the yoke 301 by screws 307, and a movable plate 302 is arranged between the plate 304 and the yoke 301. The movable plate 302 is urged toward the plate 304 by the spring 306. A disk 303 connected to the rotary shaft 101 of the rotor 10 via a hub 310 is arranged between the movable plate 302 and the plate 304. Therefore, since the movable plate 302 is attracted to the yoke 301 when a current is flowing through the coil 309, the disk 303 can rotate together with the rotating shaft 101 between the movable plate 302 and the plate 304, but When power supply is stopped, the movable plate 302 is biased by the spring 306, and the disk 302 is sandwiched between the movable plate 302 and the plate 304. In this way, the electromagnetic brake device 30 is installed in the rotor 1
Braking to zero is possible. As shown in FIG. 1, the yoke 301 has a fixing hole 301a penetrating therethrough, and is fixed to the second frame 70 of the motor case 80 by stopping the screw 311 from the fixing hole 301a.

(Wiring Structure) In the brake-equipped motor 1 constructed as described above, the electric wiring 50 for supplying power to the stator 20 and supplying power to the electromagnetic brake device 30.
2, 501 are routed as follows.

First, the electric wiring 502 to the stator 20 and the electric wiring 501 to the electromagnetic brake device 30 together with the frame ground wire 503 serve as the cable 50 by the clamp 701 to the motor case 80 (second frame 7).
It is fixed to the outer peripheral surface of 0). The clamp 701 has an opening 701a formed on the end surface and an opening 701b formed on the bottom surface, and is fixed such that the bottom surface is in contact with the outer peripheral surface of the second frame 70. At this time, the inner peripheral surface of the opening 701a formed on the end surface presses the cable 50 against the outer peripheral surface of the second frame 70, whereby the cable 50 is fixed. The cable 50 is a clamp 701.
Through the opening 701a formed on the end face of the clamp 7
Inside 01, an electric wire 502 to the stator 20, an electric wire 501 to the electromagnetic brake device 30, and a frame ground wire 503 are divided. Of these, the tip of the frame ground wire 503 is the second inside the clamp 701.
Is fastened to a screw 702 attached to the outer peripheral surface of the frame 70.

Next, in the outer peripheral surface of the second frame 70, a wiring hole 705 is formed in a portion where the clamp 701 is located.
Are formed. That is, the opening 701b formed on the bottom surface of the clamp 701 and the wiring hole 705 are continuous. The electric wires 502 and 501 separated from the cable 50 inside the clamp 701 pass through the wiring hole 705 and are drawn into the inside of the motor case 80.

The tip of the electric wiring 502 to the stator 20 is soldered to the printed circuit board 203 attached to the stator 20 inside the motor. Printed circuit board 203
Has a wiring pattern in which the ends of the windings 202 are connected by wiring. The electric wiring connecting portion of this wiring pattern is provided on the outer peripheral side of the printed board 203. Therefore, the electric wiring 502 is routed from the wiring hole 705 along the inner peripheral surface of the second frame 70 without slack.

Electric wiring 501 to the electromagnetic brake device 30
Is connected to a lead wire 305 drawn from a coil 309 of the electromagnetic brake device 30 inside the motor. The connection parts 504 are connected to each other with crimp terminals or solder, and then covered with an insulating tube.
Therefore, the connection portion 504 is relatively large. Moreover, when the connection portion 504 is arranged near the stator 20, the heat received from the stator 20 impairs the insulating property. Further, regarding the connection portion 504, it is necessary to take care so that the lead wire 305 does not come into contact with the movable plate 302 of the electromagnetic brake device 30. Therefore, in the present invention, the connection portion 504 is connected to the electromagnetic brake device 30 in the stator 2
Electromagnetic brake device 30 and motor case 80 on the side opposite to 0
It is housed in the space 35 formed between the end face of the.
In the present invention, a recess 704a formed in the inner end surface of the second frame 70 is used as such a space 35.

The structure of the second frame 70 will be described in detail with reference to FIG.

FIG. 3A is a front view of the second frame 70 as seen from the inside, and FIG. 3B is an X-O-Y view of FIG. 3A.
It is a sectional view of the 2nd frame in a -Y'-Z line.

As shown in FIG. 3, the second frame 70
The end surface portion 70e and the body portion 70f axially extending from the outer periphery of the end surface portion 70e are integrally configured. End face part 7
0e is a through hole 40 for holding the rotary bearing 402 in the center.
2a. The inner wall surface of the end face portion 70e has a through hole 40
A circular rib 70d is formed along the inner peripheral edge of 2a. Further, three ribs 70a, 70b, 70c are radially formed from the rib 70d toward the inner peripheral surface of the body portion 70f at equal angular intervals. Therefore, three recesses 704a, 704b, 704c divided by the ribs 70a, 70b, 70c are formed on the inner wall surface of the end surface portion 70e. The radial ribs 70a, 70b, 70c have
Screw hole 311a for fixing the electromagnetic brake device 30
Are formed. Here, the aforementioned wiring hole 705 is formed in the body portion 70f, and a groove 704d is formed from this wiring hole 705 toward the concave portion 704a. Therefore, when the electromagnetic brake device 30 is fixed to the inside of the second frame 70 by using the screw hole 311a, the recesses 704a, 704b, 704c are covered with the electromagnetic brake device 30. However, the wiring hole 705 and the recess 704a are still connected by the groove 704d. That is, the recess 704a becomes a bag-shaped space, and in the present invention, this space is used as the space 35 for housing the connecting portion 504 between the lead wire 305 of the electromagnetic brake device 30 and the electric wiring 501. According to this structure, the wire connection portion 504 is pushed in from the slight opening (groove 704d) of the recess 704a, and therefore the wire connection portion 504 does not come out of the space 35 by the vibration of the motor. Further, since the wire connection portion 504 is arranged on the side opposite to the stator 20, there is no fear that the insulation of the wire connection portion 504 will be destroyed by the heat generation of the stator 20. Further, since the wire connection portion 504 is on the opposite side of the movable plate 302 of the electromagnetic brake device 30 and is in a state where it cannot be pulled out from the space 35, the electric wiring 501 and the lead wire 305 are movable plates 302.
There is no fear of being caught in. Further, the gap between the stator 20 and the electromagnetic brake device 30 can be narrowed, and the brake motor can be downsized.

Here, the electromagnetic braking device 30 connects the encoder 1 (not shown) of the rotary shaft 101 to the base end portion 1.
The example in which the rotary shaft 10 is arranged on the 01b side has been described.
Even when the electromagnetic brake device 30 is disposed on the output shaft 101a side of the first connection shaft 1, the connection portion 504 is connected to the electromagnetic brake device 3
It is arranged on the opposite side of the stator 20 with respect to 0. In this case, a recess is formed on the inner wall surface of the first frame 60,
It is preferable to arrange the wire connection portion 504 using this recess.

[0024]

As described above, in the brake motor of the present invention, the connecting portion between the electric wiring to the electromagnetic brake device and the lead wire from the electromagnetic brake device is provided on the opposite side of the stator from the electromagnetic brake device. It is characterized by being placed in. Therefore, the insulating tube or the like of the wire connection portion is not damaged by the heat of the stator, and the lead wire or the like does not touch the movable plate of the electromagnetic brake device. Therefore, the space for arranging the connection portion can be narrowed, and the motor can be downsized.

[Brief description of drawings]

FIG. 1 is a diagram showing a motor with a brake according to the present invention.

FIG. 2 is a perspective view in which a part of the electromagnetic brake device is shown in section.

3A is a front view of the second frame as viewed from the inside, and FIG. 3B is a cross-sectional view of the second frame taken along line X-O-Y-Y'-Z of FIG.

FIG. 4 is a diagram showing a conventional motor with a brake.

[Explanation of symbols]

 1 Motor with Brake 10 Rotor 20 Stator 201 Stator Core 202 Winding 203 Printed Circuit Board 30 Electromagnetic Brake Device 35 Space 305 Lead Wires from Electromagnetic Brake Device 401, 402 Rotation Bearings 50 Cable 501 Electric Wiring for Stator 502 Electromagnetic Brake Device Electric wiring for supplying power to 503 Frame ground line 60 First frame 70 Second frame 701 Clamps 704a, 704b, 704c Recess 704d Groove 705 Wiring hole 80 Motor case

Claims (2)

[Claims] 1. A stator and an electromagnetic brake device for braking a rotor are arranged in a motor case along an axial direction thereof, and a lead wire from the electromagnetic brake device and an electric wire drawn into the motor case. In a motor with a brake having a wire connection portion housed in the motor case, the wire connection portion is provided between the electromagnetic brake device and an end surface portion of the motor case on a side opposite to the stator with respect to the electromagnetic brake device. A motor with a brake, which is housed in a space formed in. 2. The recess according to claim 1, wherein a recess is formed on an end surface of the motor case located on the electromagnetic brake device side.
A motor with a brake, wherein a space for accommodating the wire connection portion is formed by the recess.