JPS6335853B2 - - Google Patents

Abstract

PURPOSE:To obtain stabilized braking force in such a way that a thrust plate is inserted between a brake disc and a coil spring so that rotary force may not act directly to a coil spring during braking action, while pushers are provided on the thrust plate and a stand, in a structure applicable to receive the coil spring. CONSTITUTION:A thrust plate 11 connected to a movable piece 9 is installed between a brake disc 14 and a coil spring 12, pushers 15, 16 are formed on the thrust plate 11 and a stand 7, and a coil spring 12 is guided and supported by the pushing part. Thus, when power supply is switched on, the movable piece 9 is pulled, and shifted while the spring 12 is compressed by the thrust plate 11, and thrust to the disc 14 is released resulting in rotation of a motor 1. And, when the power supply is interrupted those motions reverse to the aforementioned, are generated due to the thrust of the spring 12, resulting in a braking action.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electromagnetic brake.

[Conventional technology]

As a conventional electromagnetic brake, the Utility Model 53-289
As shown in the publication, a brake wheel is fitted onto a rotating shaft so that it can move in the axial direction and rotate with the rotating shaft, a brake disc is slidably arranged on the side of the brake wheel, and an electromagnet is fixed. It is known to have a pressing plate that is pressed and attracted by a coil spring and an electromagnet that is almost completely housed in an iron core, and that comes into contact with a brake disc.

[Problem that the invention seeks to solve]

Such conventional electromagnetic brakes have a problem in that the coil spring is almost completely housed within the fixed iron core, so that the expansion and contraction operations of the coil spring are easily hindered. Further, sufficient consideration was not given to making each part thinner, lighter, smaller, and easier to assemble, maintain, and inspect.

[Means for solving problems]

The present invention has been made to solve such problems, and the rotor 3 of the motor 1 has a rotating shaft 17.
A brake wheel 13 is fitted so as to be movable in the axial direction and rotatable together with the rotary shaft 17, and a brake disc 14 is slidably arranged on the side surface of the brake wheel 13, and is pressed and pressed by the coil spring 12 and the electromagnet 6. In an electromagnetic brake in which a pressure plate 11 to be attracted is brought into contact with the brake disc 14, a stand 7 is attached to the end bracket 2 side of the motor 1, and a hole 8 and a circular extruded portion around the hole 8 are attached to the stand 7. 15, the electromagnet 6 is arranged on the opposite side of the brake disc of the stand 7, the press plate 11 is arranged on the side of the brake disc of the stand 7, and the electromagnet 6
A movable piece 9 is connected to the press plate 11 via the hole 8, and the outer diameter of the movable piece 9 is set larger than the diameter of the hole 8, and a conical extrusion part that largely protrudes into the press plate 11. 16 is formed concentrically with the circular extrusion part 15, and the stand 7 and the pressing plate 11
The coil spring 12 is interposed between the coil spring 12, one end of the coil spring 12 is located inside the circular extrusion part 15, the other end is located on the outer periphery of the conical extrusion part 16, and the coil spring 12 is located at the center of the brake disc 14. The electromagnetic brake is characterized in that a protrusion 21 is formed in the conical extrusion part 16, and the protrusion 21 is inserted into and abuts on the conical extrusion part 16.

[Effect]

According to this electromagnetic brake, a circular extruded portion 15 is formed on the stand 7, a conical extruded portion 16 is formed on the press plate 11 concentrically with the circular extruded portion 15,
A coil spring 12 is installed between the stand 7 and the pressing plate 11.
Since one end of this coil spring 12 is located within the circular extrusion part 15 and the other end is located on the outer periphery of the conical extrusion part 16, even if the coil spring 12 tries to shift during operation, the coil spring 12 will not move. Displacement is regulated by the circular extrusion part 15 and the conical extrusion part 16 without interfering with the expansion and contraction movement of the circular extrusion part 15, and the stand 7 and the pressing plate 11 are
The rigidity can be improved by the conical extrusion portion 16 and the thickness can be reduced.

Further, a conical extrusion portion 16 is formed on the pressing plate 11, and the other end of the coil spring 12 is formed in the conical extrusion portion 16.
A protrusion 21 is formed at the center of the brake disk 14, and this protrusion 21 is inserted into the conical extrusion 16 and abuts against the coil spring 1.
Brake disc 1 while ensuring sufficient length of 2
The tip of the rotating shaft 17 of the rotor 3 can be projected into the recess formed by the central protrusion 21 of the rotor 3, and the electromagnetic brake can be made smaller.

Furthermore, a hole 8 is formed in the stand 7, and the stand 7
An electromagnet 6 is arranged on the opposite side of the brake disc, and a pressing plate 1 is arranged on the brake disc 7 side of the stand 7.
1, the movable piece 9 of the electromagnet 6 is connected to the press plate 11 through the hole 8, and the outer diameter of the movable piece 9 is set to the hole 8.
the diameter of the stand 7 and the press plate 1.
Since the coil spring 12 is interposed between the stand 7 and the end bracket 2, the coil spring 12 presses the pressing plate 11 and the movable piece 9 comes into contact with the stand 7, and these parts are made into units. This facilitates assembly, maintenance and inspection.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3. An end bracket 2 is fitted into an opening at one end of the motor 1. A bearing 4 is attached to the end bracket 2, and a rotating shaft 17 of the rotor 3 is rotatably supported by the bearing 4. Several protrusions 5 are integrally provided on the side of the end bracket 2 opposite to the motor. One side of the L-shaped stand 7 is removably attached to this projection 5 with a bolt 19. This stand 7
A square hole 8 is formed in the center of one side, and a circular extruded portion 15 is formed around the square hole 8. Also, stand 7
An electromagnet 6 is attached to the side opposite to the brake disc. The tip of the movable piece 9 of the electromagnet 6 is inserted into the rectangular hole 8, and its outer diameter is larger than the diameter of the rectangular hole 8, so that it can move in the vertical direction from one side of the stand 7. The central protrusion 20 of the pressing plate 11 is attached to the tip of the movable piece 9 protruding from the square hole 8.
Connected via 0. The pressing plate 11 has a conical extruded portion 16 that protrudes largely from its peripheral edge and is formed concentrically with the circular extruded portion 15 . A coil spring 1 is installed between one end of the stand 7 and the pressing plate 11.
2 is interposed. With this, the pressing plate 11
spring force acts in a direction away from one side of the stand 7, and when the press plate 11 is free, the root of the movable piece 9 comes into contact with the edge of the square hole 8, supporting the press plate 11 and the coil spring 12. . The coil spring 12 is
One end is located within the circular extruded portion 15 of the stand 17, and the other end is located on the outer periphery of the conical extruded portion 16 of the press plate 11.

A spline 18 is formed at the tip of the rotating shaft 17 of the rotor 3 . A brake wheel 13 is fitted onto this spline 18. The brake wheel 13 is movable in the axial direction, and
Rotates with 7. The tip of the rotating shaft 17 projects outward from the brake wheel 13. One side of the brake wheel 13 is slidable on the end bracket 2. A brake disk 14 is slidably arranged on the other end surface of the brake wheel 13. A protrusion 21 is formed in the center of the brake disk 14. The tip of the rotating shaft 17 is located within the recess formed by the protrusion 21 . This protrusion 21 is located within the conical extrusion portion 16 of the press plate 11 and is in contact with the press plate 11. A notch is formed in the peripheral edge of the brake disc 14, and the projection 5 of the end bracket 2 is fitted into the notch.

When the power is turned on, a current flows through the motor 1 and the electromagnet 6, and the movable piece 9 is pulled, and the press plate 11 connected thereto is pulled toward the stand while compressing the coil spring 12. The pressing force of the pressing plate 11 on the brake disc 14 is released. As a result, the braking of the brake wheel 13 held between the brake disc 14 and the end coil 2 is released, and the rotor 3 of the motor 1 rotates. Next, when the power is cut off, the attractive force of the movable piece 9 is released, and the pressing force of the coil spring 12 causes the pressing plate 11 to press the brake disc 14 and brake the brake wheel 13, and the motor 1 is stopped.

According to this electromagnetic brake, a circular extruded portion 15 is formed on the stand 7, a conical extruded portion 16 is formed on the press plate 11 concentrically with the circular extruded portion 15,
A coil spring 12 is installed between the stand 7 and the pressing plate 11.
Since one end of this coil spring 12 is located within the circular extrusion part 15 and the other end is located on the outer periphery of the conical extrusion part 16, even if the coil spring 12 tries to shift during operation, the coil spring 12 will not move. Displacement is regulated by the circular extrusion part 15 and the conical extrusion part 16 without hindering the expansion and contraction movement of the stand 7 and the press plate 11, and the rigidity of the stand 7 and the pressing plate 11 is improved by the circular extrusion part 15 and the conical extrusion part 16. This makes it possible to achieve thinner walls and lighter weight.

Further, a conical extruded portion 16 that protrudes greatly is formed on the pressing plate 11, the other end of the coil spring 12 is positioned on the outer periphery of the conical extruded portion 16, and a protrusion 21 is formed in the center of the brake disc 14. Since the protrusion 21 is inserted into the conical pushing part 16 and comes into contact with it, the rotor is inserted into the recess formed by the central protrusion 21 of the brake disc 14 while ensuring a sufficient length of the coil spring 12. The tip of the rotating shaft 17 of No. 3 can be made to protrude, and the electromagnetic brake can be made smaller.

Furthermore, a hole 8 is formed in the stand 7, an electromagnet 6 is arranged on the side of the stand 7 opposite to the brake disc, and a pressing plate 1 is arranged on the side of the stand 7 opposite to the brake disc.
1, the movable piece 9 of the electromagnet 6 is connected to the press plate 11 through the hole 8, the outer diameter of the movable piece 9 is set larger than the diameter of the hole, and the stand 7 and the press plate 11 are connected.
Since the coil spring 12 is interposed between the stand 7 and the end bracket 2, the coil spring 12 presses the pressing plate 11 and the movable piece 9 comes into contact with the stand 7, and these Parts are made into units. This facilitates assembly, maintenance and inspection.

〔Effect of the invention〕

According to the present invention, the displacement of the coil spring 12 can be regulated without inhibiting the expansion and contraction movement of the coil spring 12, and the stand and the press plate can be made thin and lightweight, and are small and easy to assemble and maintain. can provide electromagnetic brakes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a direct-acting electromagnetic brake of the present invention, and FIGS. 2 and 3 are a partially assembled side view and a front view of the same electromagnetic brake. 1...Motor, 2...End bracket, 3
...Rotor, 6...Bearing, 7...Stand, 8...
...hole, 9...movable piece, 11...pressing plate, 12...
Coil spring, 13... Brake wheel, 14...
... Brake disk, 15 ... Circular extrusion part, 16
...Conical extrusion part, 17... Rotating shaft.

Claims (1)

[Claims] 1 The brake wheel 13 is movable in the axial direction on the rotating shaft 17 of the rotor 3 of the motor 1, and the rotating shaft 17
A brake disc 14 is slidably disposed on the side surface of the brake wheel 13, and a pressing plate 11 that is pressed and attracted by a coil spring 12 and an electromagnet 6 is brought into contact with the brake disc 14. In this electromagnetic brake, a stand 7 is provided on the end bracket 2 side of the motor 1.
Attach the hole 8 to this stand 7 and this hole 8.
, the electromagnet 6 is arranged on the side of the stand 7 opposite to the brake disc, the pressing plate 11 is arranged on the side of the stand 7 opposite to the brake disc, and the movable piece 9 of the electromagnet 6 is connected to the pressing plate 11 via the hole 8,
The outer diameter of the movable piece 9 is set larger than the diameter of the hole 8, and a conical extrusion part 16 that largely protrudes from the press plate 11 is formed concentrically with the circular extrusion part 15, and the stand 7 and the press The coil spring 12 is interposed between the coil spring 1 and the plate 11.
2 is located in the circular extrusion part 15 and the other end is located on the outer periphery of the conical extrusion part 16.
1, and this protrusion 21 is inserted into and abutted in the conical extrusion 16.