JP3062297U - Excitation actuated electromagnetic brake structure and assembly method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To restrict the rotation of a shaft of a motor or the like by energizing when the motor or the like is stopped, and to release the constraint of the shaft of the motor or the like by shutting off the power supply when the motor or the like rotates. The present invention provides an excitation-type electromagnetic brake for performing rotation control and positioning of a shaft such as the above. A rotor, comprising an electromagnetic coil and a yoke, fixed to a machine frame of a motor, a rotor hub fixed to a shaft of the motor, and a shaft of the motor with respect to the rotor hub. And a rotor 7 composed of an armature 6 disposed adjacent to the stator 3 and fitted to the rotor hub 4 movably in the axial direction of the shaft 11 of the motor 8. The stator 3 and the rotor 7 are assembled by inserting or fitting them into the housing 13, and the mounting claws 17 provided on the housing 13 and the shaft fixing portions 4 b provided on the rotor hub 4 do not use the screw 18 to the motor 8. It can be attached to a vehicle.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The idea is to supply power to the electromagnetic coil when the motor and the like are stopped, thereby restricting the rotation of the shaft of the motor and the like, and cut off the power to the electromagnetic coil when the motor and the like rotate. The present invention relates to an excitation-actuated electromagnetic brake that performs rotation control and positioning of a shaft of a motor or the like by releasing the restraint of the shaft such as.

[0002]

[Prior art]

 Conventionally, an excitation-actuated electromagnetic brake used in a motor or the like is configured to brake the shaft of the motor or the like by energizing the electromagnetic coil at the same time as or immediately after the supply of power to the motor or the like is shut off. The shaft of the motor etc. is held until the energization of the coil is cut off, and the constraint on the shaft of the motor etc. is released by shutting off the energization of the electromagnetic coil immediately before or simultaneously with the supply of power to the motor etc. Was configured to do so.

FIG. 2 shows an example of a conventional excitation type electromagnetic brake. The excitation-actuated electromagnetic brake shown in FIG. 2 includes a yoke 2, a stator 3 composed of an electromagnetic coil 1 built in the yoke 2, a rotor hub 4, and an axial movement of a shaft 11 such as a motor 8 with respect to the rotor hub 4. It consisted of two parts of a rotor 7 consisting of an armature 6 freely fixed via a spring 5.

In the rotor 7 of FIG. 2, the rotor hub 4 and the spring 5 and the spring 5 and the armature 6 are attached by screws 18 or rivets.

When the excitation-type electromagnetic brake shown in FIG. 2 is attached to the motor 8 or the like, first, the stator 3 is fixed to a machine frame 9 of the motor 8 or the like with screws 18, and then the shaft 3 of the motor 8 or the like is fixed to the shaft 11. The rotor hub 4 is inserted into the rotor 7 and the rotor hub 4 is fixed to the shaft 11 of the motor 8 or the like with a set screw 20 or the like so as to provide a predetermined gap between the end face of the stator 3 and the armature 6 of the rotor 7.

[0006]

[Problems to be solved by the invention]

 In the above-described conventional excitation-type electromagnetic brake, since screws and the like are used for assembling the rotor, the number of parts is increased and the assembling takes a lot of time, resulting in an increase in cost.

Further, since it is necessary to provide an air gap in the yoke or the armature in order to shorten the operation time, the unit cost of the parts becomes extremely high, and the cost is increased.

[0008] Furthermore, since it is supplied separately to the two parts of the stator and the rotor when it is mounted on a motor or the like, the management becomes complicated and the cost is increased.

[0009] Because screws are used when attaching the stator to a machine frame such as a motor, the number of parts is increased, and it takes much time to attach the stator, resulting in an increase in cost.

[0010] Since screws are used when the rotor is attached to a shaft of a motor or the like, the number of parts is increased, and it takes much time to attach the rotor, resulting in an increase in cost.

The present invention solves the above-mentioned problems of the conventional technology, and provides an excitation-actuated electromagnetic brake that can be assembled and mounted at low cost by reducing the number of parts while reducing the unit cost. The purpose is to:

[0012]

[Means for Solving the Problems]

 To achieve the above object, as shown in FIG. 1, a stator 3 comprising an electromagnetic coil 1 and a yoke 2 and fixed to a machine frame 9 such as a motor 8 is provided and fixed to a shaft 11 such as a motor 8. The rotor hub 4 is fixed to the rotor hub 4 with respect to the rotation direction of the shaft 11 such as the motor 8 and is freely fitted in the rotor hub 4 in the axial direction of the shaft 11 such as the motor 8. A rotor 7 composed of the arranged armature 6 is provided. The stator 3 and the rotor 7 are assembled into the housing 13 by inserting them into the housing 13 or fitted and fixed to the fixing claws 16. The motor 8 is fixed by the mounting claws 17 provided on the housing 13 and the shaft fixing portions 4 b provided on the rotor hub 4. Attach without using screws 18 or the like. The present invention is an electromagnetically actuated electromagnetic brake configured as described above.

[0013]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the excitation type electromagnetic brake of the present invention. A pair of yokes 2 made of a soft magnetic material such as iron, a cylindrical portion 2b for inserting the electromagnetic coil 1, a magnetic pole portion 2a for absorbing the armature 6, and a fixing groove 1 corresponding to the fixing claw 16 of the housing 13. 9 is provided.

The diameter of the through hole provided at the center of the cylindrically wound electromagnetic coil 1 is formed slightly larger than the cylindrical portion 2 b of the yoke 2, and the width of the electromagnetic coil 1 is equal to the diameter of the cylindrical portion 2 b. It is about 0.1 mm wider than twice the length.

The direction of the magnetic pole portions 2 a of the pair of yokes 2 is aligned, and the cylindrical portion 2 b of the yoke 2 is inserted into the through-hole provided in the electromagnetic coil 1 to be inserted into the stator 3.

The outer shape of the rotor hub 4 made of a thermoplastic resin or the like is formed in a polygonal shape such as a quadrangle, and a thin plate-shaped spring 5 and a projecting armature stopper 4a are provided in a part thereof.

The distance between the free end of the spring 5 provided on the rotor hub 4 and the armature stop 4 a is slightly smaller than the thickness of the armature 6.

A shaft mounting hole 4c having a shape such as a D-shape is provided on the end surface of the rotor hub 4 opposite to the side on which the spring 5 is formed, and a projection is formed on a circumferential portion inside the shaft mounting hole 4c. A shaft fixing portion 4b is formed.

The armature 6 made of a soft magnetic material such as iron has a disk shape, is similar to the outer shape of the rotor hub 4 at the center, is slightly larger than the outer shape of the rotor hub 4, and is slightly smaller than the armature stopper 4a of the rotor hub 4. A through hole is provided.

The armature 6 is pushed from the armature stopper 4 a side of the rotor hub 4 while elastically deforming the armature stopper 4 a, so that the rotor 7 is fitted between the armature stopper 4 a of the rotor hub 4 and the spring 5.

The housing 13 made of a thermoplastic resin or the like has a cylindrical shape and an inner diameter larger than that of the armature 6, and has a bottom 14 at one end. At the center of the bottom portion 14, a through hole larger than the diameter of the shaft 11 of the motor 8 or the like to be mounted is provided.

A fixing claw 16 for fixing the stator 3 is provided on the cylindrical portion 15 of the housing 13, and a mounting claw 17 for fixing the housing 13 to the machine frame 9 such as the motor 8 is provided on the bottom portion 14.

The present invention is configured as described above, and when assembling the same, the rotor 7 is connected to the cylindrical portion of the housing 13 such that the shaft mounting hole 4 c of the rotor hub 4 and the bottom portion 14 of the housing 13 face each other. 15, the stator 3 is inserted from the magnetic pole portion 2 a into the housing 13, and is fixed to the housing 13 by fixing claws 16 of the housing 13.

When mounting the assembled excitation type electromagnetic brake on the machine frame 9 such as the motor 8, first, the shaft 11 of the motor 8 or the like, which is similar to the shaft mounting hole 4 c of the rotor hub 4 and is slightly smaller, is formed. And the direction of the shaft mounting hole 4c of the rotor hub 4 is aligned, and the shaft 11 of the motor 8 or the like is inserted into the shaft mounting hole 4c of the rotor hub 4.

Next, the positions of the mounting grooves 10 provided in the machine frame 9 such as the motor 8 and the mounting claws 17 of the housing 13 are aligned, and the housing 13 is pressed in the direction of the machine frame 9 such as the motor 8 so that the rotor hub 4 While the shaft fixing portion 4b is elastically deformed, the shaft fixing portion 4b moves to and fits into the rotor hub fixing groove 12 provided on the shaft 11 of the motor 8 or the like, and the rotor hub 4 is fixed to the shaft 11 of the motor 8 or the like. Further, the mounting claw 17 of the housing 13 is moved to the mounting groove 10 of the machine frame 9 such as the motor 8 while being elastically deformed and fitted, so that the excitation operation type electromagnetic brake can be mounted on the motor 8 or the like. Complete.

[0026]

[Effect of the invention]

 By using the present invention, since screws and rivets are not used for assembling the rotor, the number of parts can be reduced, assembly can be performed in a short time, and an electromagnetically actuated electromagnetic brake can be assembled at lower cost. .

In addition, since it is not necessary to provide an air gap provided in the yoke or the armature in order to shorten the operation time in the related art, the unit cost of parts can be reduced.

Further, since the stator and the rotor can be supplied integrally without being separated at the time of attachment to a motor or the like, complicated management is not required and cost can be reduced.

Conventionally, the screws used when mounting the stator to the machine frame of a motor or the like become unnecessary, so that the number of parts can be reduced, and the mounting can be performed in a shorter time, so that the cost is reduced. Can be reduced.

Since no screws are used when the rotor is mounted on the shaft of the motor or the like, the number of parts can be reduced, and the mounting can be performed in a short time, so that the mounting cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an example of a conventional excitation operation type electromagnetic brake.

[Description of Signs] 1 Electromagnetic coil 2 Yoke 2a Magnetic pole 2b Column 3 Stator 4 Rotor hub 4a Armature stop 4b Shaft fixing part 4c Shaft mounting hole 5 Spring 6 Armature 7 Rotor 8 Motor 9 Machine frame 10 Mounting groove 11 Shaft 12 Rotor hub fixing Groove 13 Housing 14 Bottom part 15 Cylindrical part 16 Fixing claw 17 Mounting claw 18 Screw 19 Fixing groove 20 Set screw

Claims (1)

[Utility model registration claims] 1. A stator 3 comprising an electromagnetic coil 1 and a yoke 2 and fixed to a machine frame 9 such as a motor 8;
The armature is fixed to the rotor hub 4 fixed to the shaft 11 in the rotation direction of the shaft 11, and is fitted to the rotor hub 4 so as to be movable in the axial direction of the shaft 11, and is disposed adjacent to the stator 3. Armature 6 against the elastic force of the spring 5 when the electromagnetic coil 1 is energized.
Is attracted to the yoke 2 to generate a frictional force between the armature 6 and the yoke 2 to brake and hold the shaft 11 such as the motor 8 via the rotor hub 4. When the armature 6 separates from the yoke 2 by the resilience of the above, the frictional force disappears, and the housing 13 for accommodating or fixing the respective members is provided in the excitation type electromagnetic brake that releases the shaft 11 of the motor 8 or the like. The assembly is performed by inserting the above members into the housing 13 or fitting and fixing the members with the fixing claws 16, and the mounting is performed on the motor 8 and the like by the mounting claws 17 provided on the housing 13 and the shaft fixing portions 4 b provided on the rotor hub 4. An excitation type electromagnetic brake characterized in that it is possible.