JPH048142A - Deenergized electromagnetic brake motor - Google Patents

Abstract

PURPOSE:To improve the effect of reducing the noise at the time of attraction with a brake by means of a simple structure by providing a tubular silencer cover, which surrounds a movable iron core and a rotary disc and ranges to a fixed iron core and a damping plate. CONSTITUTION:A fixed iron core 1 has an electromagnetic coil 2 built-in, and a movable iron core 4 and a rotary disc 6 are pressed against a bracket 7 by the pressure of a plurality of damping springs 3 embedded in the fixed iron core 1. A silencer cover 22 is attached to the fixed iron core 1 and the periphery of the bracket 7 doubling as a damping plate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motor with a non-excited electromagnetic brake that brakes and holds a rotating body.

[Conventional technology]

FIG. 2 is a half-sectional view of a main part of a conventional example, in which a fixed iron core 1 is fixed with a NAND to a plurality of studs 5 attached to a bracket 7 which also serves as a brake plate on the non-driving side of the motor.

A movable iron core 4 that is movable in the axial direction under the guidance of a stud 5 is arranged opposite to this. The fixed iron core 1 has a built-in electromagnetic coil 2. The movable iron core 4 and the rotary disk 6 are pressed against a bracket 7 which also serves as a brake plate on the non-driving side by the pressing force of a plurality of brake springs 3 embedded in the fixed iron core 1. The rotating disk 6 is axially movably fitted into a center hub 8 which is attached to a rotating shaft 9 with a key 10 coupled thereto.

In order to reduce the sound of the suction force generated between the gaps, the entire brake is surrounded by a cast metal cover 12.

[Problem to be solved by the invention]

In order to reduce the sound of the conventional motor when the brake is suctioned, a cast metal cover was used, but this caused problems in terms of working efficiency, cost, and weight. Moreover, in order to avoid the above-mentioned problems, it was necessary to manufacture a special product.

An object of the present invention is to improve the noise reduction effect during brake suction with a simple structure.

[Means to solve the problem]

In order to solve this problem, the non-excited electromagnetic brake motor of the present invention includes a fixed iron core wrapped with an electromagnetic coil, and an axial direction that is attracted to the fixed iron core to release the brake, and is pushed by a brake spring to perform the braking. a movable iron core that is movable, a rotating disk that is positioned between the movable iron core and the brake plate and is braked or released from braking, and a center hub that is movably coupled to the rotating disk in the axial direction. A non-excited electromagnetic brake motor, in which the braking plate is integrally formed with a bracket of a motor, and the center hub is fixed with a key to the rotating shaft of the motor that is supported by a bearing passing through the bracket. A cylindrical sound-absorbing cover is provided that surrounds the movable iron core and the rotating disk and is connected to the fixed iron core and the brake plate.

, Effect] It is possible to reduce the sound generated when the brake is applied by surrounding the entire brake device using a non-magnetic sound-absorbing cover.

〔Example〕

FIG. 1 is a half-sectional view of the main part of the embodiment, in which a fixed iron core 1 is fixed with a NAND to a plurality of stands 5 attached to a bracket 7 which also serves as a brake plate on the non-driving side of the motor.

A movable iron core 4 that is movable in the axial direction under the guidance of a stud 5 is arranged opposite to this. The fixed iron core 1 has a built-in electromagnetic coil 2. The movable core 4 and the rotary disk 6 are pressed against a bracket 7 which also serves as a brake plate on the non-driving side by the pressing force of a plurality of brake springs 3 embedded in the defined core 1. The rotating disk 6 is axially movably fitted into a center hub 8 which is attached to a rotating shaft 9 with a key 10 coupled thereto.

Up to this point, the structure is the same as the conventional example, but the characteristic structure of this example is that the outer periphery of the fixed iron core 1 and the bracket 7, which also serves as a brake plate on the non-driving side, is designed to reduce noise during brake suction. Attach the sound deadening cover 22 to the. The material of the sound deadening cover 22 only needs to be non-magnetic, and for example, synthetic resin, garbage, non-magnetic stainless steel, etc. can be used. Note that it is preferable to provide an inner noise-reducing cap 23 on the inner circumference of the fixed iron core 1.

〔Effect of the invention〕

The non-excited electromagnetic brake motor of the present invention includes a fixed iron core wrapped with a @Ttfi coil, and a movable iron core that is attracted to the defined iron core, releases the brake, and is movable in the axial direction, which is pushed by a brake spring to apply the brake. A non-excited electromagnetic brake is composed of a rotating disk positioned between the movable iron core and the brake plate to be braked or released from the brake, and a center hub coupled to the rotating disk so as to be movable in the axial direction. In a non-excited electromagnetic brake motor in which the braking plate is integrally formed with a bracket of the motor, and the center hub is fixed with a key to the rotating shaft of the motor that passes through the bracket and is supported by a bearing, the movable iron core and the Since a cylindrical sound-muffling cover is provided surrounding the rotating disk and connected to the fixed iron core and the brake plate, the sound is muffled by the sound-muffling cover at a position close to the source of noise during brake suction. The simple structure has the effect of muffling brake noise.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of the main part of the embodiment, and FIG. 2 is a half-sectional view of the main part of the conventional example. l... Fixed iron core, 4... Movable iron core, 6... Rotating disk, 7... Bracket that also serves as a brake plate, 8... Center hub, 12... Casting cover, 22... Sound deadening cover, 23... Sound deadening cap.

Claims (1)

[Scope of Claims] 1) A fixed core wrapped with an electromagnetic coil, a movable core that is attracted to the fixed core to release braking, and is movable in an axial direction that is pushed by a braking spring to apply the brake; A non-excited electromagnetic brake is constituted by a rotating disk positioned between an iron core and a brake plate to be braked or released from braking, and a center hub coupled to the rotating disk so as to be movable in the axial direction, A non-excited electromagnetic brake motor in which a braking plate is integrally formed with a bracket of the motor, and the center hub is fixed with a key to the rotating shaft of the motor that passes through the bracket and is supported by a bearing, wherein the movable iron core and the rotating disk 1. A non-excited electromagnetic brake motor, characterized in that a cylindrical sound deadening cover is provided surrounding the fixed iron core and connecting to the brake plate.