JP5050886B2 - Electric motor with built-in electromagnetic brake and assembly method thereof - Google Patents

Description

  The present invention relates to an electric motor with a built-in electromagnetic brake in which a power connector for supplying power is connected to a brake lead wire.

  Conventionally, electric motors for industrial use have been provided with waterproof measures using power connectors for power supply represented by cannon plugs. The power connector is connected to the lead wire of the electromagnetic brake by soldering, and the power connector is connected to the motor. Screws are attached to the main body.

  And in order to eliminate the slack of the lead wire while improving the connection work between the lead wire and each terminal of the power connector, a passage leading to the outside for the lead wire is provided inside the bracket forming the outer shell of the motor, and the lead wire of the electromagnetic brake is connected. What has been passed has been proposed (see, for example, Patent Document 1).

On the other hand, in order to improve the connection work between the lead wire and each terminal of the cannon plug while eliminating the slack of the lead wire, insert a spacer between the cannon plug and the mouth of the bracket and divide this spacer to connect the lead wire. There has been proposed one in which a spacer can be attached after connection (see, for example, Patent Document 2).
JP 2000-245099 A Japanese Utility Model Publication No. 60-119867

  The problem to be solved is to achieve both prevention of sag of the lead wire and securing of waterproof performance when the power connector is screwed to the side of the motor after connecting the power connector and the brake lead wire.

  As in the invention disclosed in Patent Document 1, in order to provide a passage that leads to the outside of the bracket and to facilitate the soldering operation through the brake lead wire in the passage, it is necessary to provide an extra lead wire from the outlet of the passage. Yes, when the power connector is fixed after soldering, the brake lead wire sags inside the passage and comes into contact. For this reason, if it is attached to a device to which vibration is frequently applied, there is a possibility that the brake lead wire is rubbed and insulation failure occurs.

  On the other hand, as in the invention disclosed in Patent Document 2, in order to improve the solder connection work of the power connector, when a spacer is inserted between the cannon plug and the hole of the bracket and the spacer is divided, screw fixing is performed. Since the pressure does not act on the dividing surface of the spacer, it cannot be used for waterproof applications.

  For this reason, in order to ensure waterproofness in the conventional split structure, it is necessary to apply liquid silicon or the like to the split surface, and the silicon that protrudes from the split surface must be wiped off. Waterproof performance was not perfect due to variations in conditions.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an electromagnetic brake built-in electric motor that ensures reliability and waterproof performance in a lead-out portion while ensuring connection workability between a power connector and a lead-out wire. .

  In order to solve the above-mentioned conventional problems, an electric motor with a built-in electromagnetic brake according to claim 1 houses an electromagnetic brake for braking a rotating shaft of the electric motor, a power connector connected to a brake lead wire of the electromagnetic brake, and the electromagnetic brake. And a bracket provided with a lead-through hole that houses the terminal portion of the power connector from the outer wall side, the electromagnetic brake and the power connector are each screwed to the bracket, and the brake lead-out line passes through the lead-out of the bracket. It is shifted from the hole in the rotation direction, and there is no slack.

  In addition, the electromagnetic brake built-in motor according to claim 2 is provided with a groove for accommodating a brake lead wire on the inner peripheral surface of the bracket or the outer peripheral surface of the electromagnetic brake.

  In the electromagnetic brake built-in electric motor according to claim 3, a plate-shaped packing is interposed between the power connector and the bracket.

  Further, in the method for assembling the electric motor with built-in electromagnetic brake according to claim 4, the brake lead wire is pulled out from the lead through hole portion of the bracket, the step 1 for housing the electromagnetic brake in the bracket, and the brake lead wire drawn out from the lead through hole portion. Pass the wire through the center hole of the plate-shaped packing and connect the power connector to the terminal of the power connector and the electromagnetic brake housed in the bracket in the rotational direction to eliminate the slack of the brake lead wire, Step 3 is provided for fixing the screw to the outer wall and fixing the electromagnetic brake to the bottom surface of the bracket.

  According to the electric motor with a built-in electromagnetic brake according to claim 1, since the brake lead wire is fixed in a state shifted from the lead through hole portion of the bracket in the rotation direction, connection workability such as soldering of the power connector and the brake lead wire is performed. An electric motor with a built-in electromagnetic brake that does not sag the brake lead wire while securing the above can be obtained.

  Further, according to the electric motor of the second aspect, it is possible to prevent the brake lead wire from rubbing.

  Moreover, according to the electric motor of Claim 3, waterproof performance is securable with plate-shaped packing.

  According to the assembling method of the present invention, the connecting operation such as soldering of the power connector and the brake lead wire is facilitated, and the electric motor with a built-in electromagnetic brake with high waterproof performance and prevention of slack of the lead wire is provided. Is obtained.

Pull out the brake lead wire from the lead through hole of the bracket, and store the electromagnetic brake in the bracket. Step 1 Connect the brake lead wire drawn from the lead through hole to the terminal of the power connector through the center hole of the plate packing. Step 2 and step 3 in which the electromagnetic brake housed in the bracket is shifted in the rotational direction and the slack of the brake lead wire is removed, and the power connector is screwed to the outer wall of the bracket and the electromagnetic brake is screwed to the bottom surface of the bracket. Is an assembling method. Hereinafter, embodiments will be described.
(Embodiment 1)
The feature of the present invention lies in the procedure for incorporating the electromagnetic brake into the bracket, and after the brake lead wire drawn out from the lead hole of the bracket and the power connector are soldered and connected, the electromagnetic brake is shifted and fixed in the rotational direction. is there. In order to facilitate the connection work, the length of the brake lead wire is made longer than usual.

  1 and 2 are a plan view of a main part and a half sectional view of the main part in the first embodiment. In FIGS. 1 and 2, 1 is an electromagnetic brake, 2 is a brake lead wire, 3 is a bracket that supports the rotating shaft of the motor, 4 is a lead-through hole of the bracket 3, and 5 is provided on the inner peripheral surface of the bracket 3. A groove, 6 is a power connector, 7 is a plate-shaped packing, 8 is a bolt for fixing an electromagnetic brake, and 9 is a screw for fixing the power connector.

  The electromagnetic brake 1 that brakes the rotating shaft of the electric motor is supplied with electric power from the power connector 6 connected to the brake lead wire 2, energizes the brake coil, and moves the friction plate in the axial direction together with the excited yoke. There are two types of electromagnetic brakes that ensure the brake function in an excited state or a non-excited state.

  A brake lead wire 2 is drawn out on the wall surface of the bracket 3, a lead through hole portion 4 for receiving the terminal portion of the power connector 6 from the outside is provided, and a groove 5 for receiving the brake lead wire 2 is provided on the inner peripheral surface. A hole through which the bolt 9 passes is provided at a predetermined position, and the electromagnetic brake 1 is fixed to the bottom surface of the bracket 3 with the bolt 9.

  The power connector 6 is a cannon plug provided with four mounting holes (not shown) in a square flange portion 6a. The power connector 6 includes a cylindrical portion 6c incorporating a terminal 6b and a rectangular flange portion 6a. Connect the brake lead wire 2 to the solder. A tapped hole is provided on the outer wall surface of the lead-out through-hole portion 4 in accordance with the position of the mounting hole, and the power connector 6 and the packing 7 are fixed with screws 9.

  The packing 7 has a thin plate-like rubber excellent in weather resistance and chemical resistance, and a circular hole through which the cylindrical portion 6c of the power connector 6 passes in the center and round holes at the same pitch as the mounting holes of the power connector 6 at the four corners. And can be obtained by pressing.

  The electromagnetic brake 1 is disposed on the stator side of the bracket 3. After the brake lead wire 2 is pulled out from the lead through hole 4 and connected to the power connector 6, the electromagnetic brake 1 housed in the bracket 3 is rotated from the lead through hole 4 in the direction in which the groove 5 is provided, and the slack is obtained. Fix to the bracket 3 in the absence of The electromagnetic brake 1 is fixed with a bolt 8 penetrating the bracket 3 from the side opposite to the stator. The power connector 6 is fixed to the outer wall of the bracket 3 with screws 9.

  Here, the assembly method will be described. First, in step 1, the brake lead wire 2 of the electromagnetic brake 1 is pulled out from the lead through hole portion 4 of the bracket 3, and the electromagnetic brake 1 is stored in the bracket 3.

  In step 2, the brake lead wire 2 drawn out from the lead-out through-hole portion 4 is connected to a predetermined terminal of the power connector 6 by soldering in a state where the round hole of the packing 7 is passed. In order to facilitate the soldering operation in step 2, the length of the brake lead wire 2 is set to be about 20 mm longer than usual so that the brake lead wire 2 can be pinched with a finger while being fully pulled out from the lead through hole portion 4.

  In step 3, the electromagnetic brake 1 housed in the bracket 3 is rotated in the direction of the groove 5 so that the brake lead wire 2 is not slack, and the power connector 6 is attached to the outer wall of the bracket 3 together with the packing 7 with screws 9. The electromagnetic brake 1 is fixed to the bottom surface of the bracket 3 with bolts 8.

  Thereby, the brake lead wire 2 set longer than usual can be stored in the groove 5 provided on the inner peripheral surface of the bracket 3. Therefore, the groove 5 is provided on the inner peripheral surface of the bracket 3. The position where the groove 5 is provided is from the lead-out through-hole portion 4 and is provided in a range in which the dimension set longer than usual can be absorbed.

  By step 1-3, the slackness of the brake lead wire 2 can be eliminated, and the brake lead wire 2 and the bracket 3 can be prevented from being rubbed.

  The connector is not limited to a cannon plug, and can be implemented with a waterproof power connector (for example, JN1, JN2 series of Japan Aviation Electronics Co., Ltd.) having the same configuration. Further, the packing may be changed from a plate-shaped packing to an O-ring. In this case, a ring groove is provided in the outer wall of the lead-through hole of the bracket 3, and the O-ring is provided between the flange 1 a of the power connector 1 and the outer wall of the bracket 3. And the O-ring is brought into close contact by the tightening force of the screw to ensure a waterproof function.

Moreover, the connection method of the terminal of a power connector and a brake lead wire is not limited to soldering, but a terminal is provided at the tip of the brake lead wire, and the connection work by inserting a terminal can be similarly performed.
(Embodiment 2)
In the first embodiment, the groove for accommodating the lead wire of the brake is provided on the inner periphery of the bracket, but in the second embodiment, a notch is provided on the outer periphery of the electromagnetic brake.

  As shown in FIG. 3, the notch part 10 is provided in the outer periphery of an electromagnetic brake. This notch 10 is used as a substitute for the groove provided on the inner periphery of the bracket of the first embodiment. Thereby, like the first embodiment, it is possible to prevent the brake lead wire from rubbing.

  The electric motor of the present invention is most suitable for preventing line rubbing of a brake having a lead wire, and at the same time, can secure a waterproof function, and can improve the connection workability of the lead wire.

The top view of the principal part in Embodiment 1 of this invention The half sectional view of the important section in Embodiment 1 of the present invention The top view of the principal part in Embodiment 2 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic brake 2 Brake lead wire 3 Bracket 4 Lead through-hole part 5 Groove 6 Power connector 6a Collar part 6b Terminal 6c Cylindrical part 7 Packing 8 Bolt (for brake fixation)
9 Screws (for fixing connectors)

Claims (4)

An electromagnetic brake that brakes the rotating shaft of the electric motor;
A power connector connected to a brake lead wire of the electromagnetic brake;
The electromagnetic brake is accommodated, and a bracket provided with a lead-through hole that accommodates the terminal portion of the power connector from the outer wall side,
The electromagnetic brake built-in electric motor according to claim 1, wherein the electromagnetic brake and the power connector are each screwed to a bracket, and the brake lead wire is shifted in the rotational direction from the lead through hole portion of the bracket so that there is no slack.   The electric motor with a built-in electromagnetic brake according to claim 1, wherein a groove for accommodating a brake lead wire is provided on an inner peripheral surface of the bracket or an outer peripheral surface of the electromagnetic brake.   The electric motor with a built-in electromagnetic brake according to claim 1 or 2, wherein a plate-like packing is interposed between the power connector and the bracket. Step 1 of drawing out the brake lead wire from the lead through hole of the bracket and storing the electromagnetic brake in the bracket;
Step 2 of connecting the brake lead wire pulled out from the lead-through hole portion through the center hole of the plate-like packing and the terminal of the power connector;
The electromagnetic brake equipped with step 3 to fix the power connector to the outer wall of the bracket and the electromagnetic brake to the bottom of the bracket with the electromagnetic brake housed in the bracket shifted in the rotational direction and the slack of the brake lead wire removed How to assemble built-in motor.

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