JPH1096438A - Deenergization operation type electromagnetic brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve a problem wherein face oscillation of an armature is increased, a gap with a magnet assembly is unbalanced, and brake release operation is rendered unstable, in a conventional deenergization operation type electromagnetic brake comprising a magnet assembly with a built-in coil; an armature with a built-in radial ring permanent magnet; and a hub on which the armature is axially displaceably mounted. SOLUTION: A hub 10 and a plurality of drive pins 12 are integrally molded through a rubber integrally molded damper 11, and an armature 13 is coupled to a drive pin 12. Further, a difference in stage for a pre-load is formed the drive pin and the end face of the hub, and when the armature is caulked to a drive pin or when the armature is coupled thereto by means of a bolt, a pre-load is exerted on the armature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a non-excited operation type electromagnetic brake.

[0002]

2. Description of the Related Art A conventional non-excitation type electromagnetic brake will be described with reference to FIGS. 4A and 4B show a configuration of a conventional non-excited operation type electromagnetic brake. FIG. 4A is a half sectional side view, FIG. 4B is a left front view of FIG.
FIG. 5 is a diagrammatic side view for explaining a gap imbalance of the electromagnetic brake of FIG. 4. The non-excited operation type electromagnetic brake shown in FIG. 4 includes a magnet assembly 1 having a coil 2 built therein, an armature 4 having a radial ring permanent magnet 5 built therein, and a rubber integrated elastic body 7 comprising the armature 4.
And a hub 3 formed integrally with the hub 3. The rubber-integrated elastic body 7 may be a rubber type or a nylon type. The armature 4 is provided with a magnetoresistive gap 6 made of copper brazing (non-magnetic). The magnet assembly 1 is fixed to a fixed frame 8 with bolts or the like, and the hub 3 is fixed to a rotating shaft 9 such as a motor with a set screw or the like. The magnet assembly 1 and the armature 4 are set with a gap g. Normally (when the coil 2 is not energized), the armature 4 is attracted to the fixed magnet assembly 1 by the magnetic flux of the permanent magnet 5, and the rotating shaft 9 is stopped and held by the braking action. When the brake is released, when a current is applied to the coil 2 via a lead wire, a magnetic flux in the opposite direction to the magnetic flux of the permanent magnet 5 flows, the magnetic flux is offset on the attracting surface, and the repulsive action of the magnetic flux and the axis of the rubber integrated molding The armature 4 is released by the deflection reaction force in the
Rotate with.

[0003]

However, in the case of the non-excited operation type electromagnetic brake shown in FIG. 4, since the rubber-integrated elastic body 7 is not restrained in any of the axial direction, the radial direction, and the torsional direction, the shaft is not supported. Some twisting occurs in the direction of the armature 4 as shown in FIG.
In this case, there is a problem that the deflection of the surface A increases, the gap g becomes unbalanced, and the releasing operation becomes unstable.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a magnet assembly including a coil, an armature including a radial ring permanent magnet, and an axially displaceable armature. In a non-excited operation type electromagnetic brake including a mounted hub, as a first invention, a hub and a plurality of drive pins are integrally formed via a rubber integrally formed damper, and an armature is connected to the drive pin. As a second invention, a hub and a plurality of drive pins are integrally formed via a rubber-integrated damper, and a main body of the drive pin and the hub are formed as a second invention. A preload step is provided between the end face and the preload, and when the armature is caulked to the drive pin, a preload is applied to the armature. As a third invention, a hub and a plurality of drive pins are integrally formed via a rubber-integrated damper, and the drive pin and an end face of the hub are formed as a third invention. It is an object of the present invention to provide a non-excited operation type electromagnetic brake in which a preload step is provided between the armatures and a preload is applied to the armature when the armature is connected to the drive pin by bolts.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a non-excited operation type electromagnetic brake according to the present invention will be described below with reference to FIGS. 1A and 1B show a first embodiment of a non-excited operation type electromagnetic brake according to the first invention, wherein FIG. 1A is a half sectional side view, and FIG. 1B is a left front view of FIG. FIG. 2 shows a second embodiment of a non-excited operation type electromagnetic brake corresponding to the second invention.
(A) is a cross-sectional side view of the outer peripheral half of the hub, and (B) is (A).
FIG. 3 is a cross-sectional side view of an outer peripheral half of a hub in which a drive pin and an armature are joined by caulking, and FIG. 3 is a third view of a non-excited operation type electromagnetic brake according to the third invention.
(A) is a cross-sectional side view of an outer peripheral portion of a hub, and (B) is a cross-sectional side view of an outer peripheral portion of a hub in which a drive pin and an armature of (A) are connected by bolts. In each of the first to third embodiments shown in FIGS. 1 to 3, similarly to the non-excitation operation type electromagnetic brake shown in FIG. 4, a magnet assembly including a coil and a radial ring permanent magnet are provided. This is a non-excited operation type electromagnetic brake including an armature having a built-in magnet and a hub on which the armature is mounted so as to be displaceable in the axial direction.

First Embodiment First, a first embodiment will be described with reference to FIG. The first embodiment corresponds to the first aspect of the invention, in which a hub 10 and a plurality of drive pins 12 are integrally formed via a rubber integrally formed damper 11 and an armature 13 is connected to the drive pin 12. This is a non-excited operation type electromagnetic brake which is adapted to be coupled to a motor. That is, holes are provided in several places of the hub 10 and are coupled to the armature 13 or the integral drive pins 12 are fitted as shown in FIG. 1, and rubber is injected into a gap between the drive pins 12 and the holes of the hub 10. The degree of freedom in the axial direction is restrained by bringing the rear surface of the armature 13 into close contact with the hub 10 so that the armature 1
At the time of release of 3, the deflection of the friction surface of the armature 13 due to the deformation distortion of the rubber integrally molded damper 11 is prevented. FIG. 1 illustrates a first embodiment in which the drive pin 12 is caulked and connected to the armature 13, but the connection may be press-fitting or welding, and is optional. The rubber-integrated damper 11 may be rubber-based or nylon-based.

Second Embodiment Next, a second embodiment will be described with reference to FIG. The second embodiment corresponds to the second aspect of the present invention, in which a hub 20 and a plurality of drive pins 22 are integrally formed via a rubber integrally formed damper 21, and a main body of the drive pin 22 is formed. A step for preloading is provided between the armature 23 and the end face of the hub 20, and when the armature 23 is caulked to the drive pin 22, a non-excited operation type electromagnetic brake adapted to apply a preload to the armature 23 is provided. is there. That is, the drive pin 22 is disposed at the same time on the circumference of the hub 20, and the armature 23 and the drive pin 22 are
Are integrated. The rear of the armature 23 is the hub 20
Is secured to the shaft hole A, the rear surface of the armature 23 is restrained, the runout of the friction surface of the armature 23 can be prevented, and the release operation of the brake is extremely stabilized. The drive pin 22 has a structure that follows the movement of the armature 23 when the brake is actuated and can move freely in the axial direction by utilizing the elastic action of the rubber-integrated damper 21. When the brake is operated, the drive pin 22 receives torque. The rubber-integrated damper 21 may be a rubber-based or nylon-based damper.

Third Embodiment Next, a third embodiment will be described with reference to FIG. The third embodiment corresponds to the third aspect of the present invention, in which a hub 30 and a plurality of drive pins 32 are integrally formed via a rubber integrally formed damper 31, and the drive pin 32 and the hub A step for preloading is provided between the armature 33 and the end face of the drive pin 32, and a bolt 34 is attached to the drive pin 32.
The non-excited operation type electromagnetic brake is configured to apply a preload to the armature 33 when the electromagnetic brake is coupled. The rubber-integrated damper 31 may be made of rubber or nylon. It should be noted that the third embodiment is substantially the same as the second embodiment except that the second embodiment is a caulking connection but a bolt connection.

[0009]

The non-excited operation type electromagnetic brake according to the present invention has the following excellent effects because it is configured as described above. Prevents the armature from oscillating and stabilizes the brake release operation characteristics. A preload is applied to the armature, and even in a ripple power supply specification such as a half-wave or full-wave, there is an effect of suppressing the chatter vibration of the armature, so that the generation of the conventional unpleasant chatter noise is eliminated. The brake release operation voltage range is stabilized.

[Brief description of the drawings]

1A and 1B show a first embodiment of a non-excited operation type electromagnetic brake according to the first invention, wherein FIG. 1A is a half sectional side view, and FIG. 1B is a left front view of FIG. It is.

FIGS. 2A and 2B show a second embodiment of a non-excited operation type electromagnetic brake corresponding to the second invention, wherein FIG. 2A is a cross-sectional side view of an outer peripheral half of a hub, and FIG. FIG. 5 is a cross-sectional side view of an outer peripheral half of a hub in which the drive pin and the armature are joined by caulking.

3A and 3B show a third embodiment of a non-excited operation type electromagnetic brake according to the third invention, wherein FIG. 3A is a cross-sectional side view of an outer peripheral portion of a hub, and FIG. 3B is a drive of FIG. FIG. 4 is a cross-sectional side view of an outer peripheral portion of a hub in which a pin and an armature are joined by bolts.

4A and 4B show a configuration of a conventional non-excitation operation type electromagnetic brake, in which FIG. 4A is a half sectional side view, and FIG. 4B is a left front view of FIG.

FIG. 5 is a diagrammatic side view for explaining a gap imbalance of the electromagnetic brake of FIG. 4;

[Explanation of symbols]

 10: Hub 11: Rubber integrated molding damper 12: Drive pin 13: Armature 20: Hub 21: Rubber integral molding damper 22: Drive pin 23: Armature 30: Hub 31: Rubber integral molding damper 32: Drive pin 33: Armature 34: bolt

Claims (3)

[Claims] A magnet assembly containing a coil;
In a non-excitation type electromagnetic brake including an armature having a built-in radial ring permanent magnet and a hub on which the armature is mounted so as to be displaceable in the axial direction, the hub and a plurality of drive pins are connected via a rubber-integrated damper. A non-excited operation type electromagnetic brake, wherein an armature is integrally formed and an armature is connected to the drive pin. 2. A magnet assembly containing a coil,
In a non-excitation type electromagnetic brake including an armature having a built-in radial ring permanent magnet and a hub on which the armature is mounted so as to be displaceable in the axial direction, the hub and a plurality of drive pins are connected via a rubber-integrated damper. It is formed integrally, and a step for preloading is provided between the main body of the drive pin and the end face of the hub, and when the armature is caulked to the drive pin, a preload is applied to the armature. A non-excited operation type electromagnetic brake. 3. A magnet assembly containing a coil,
In a non-excitation type electromagnetic brake including an armature having a built-in radial ring permanent magnet and a hub on which the armature is mounted so as to be displaceable in the axial direction, the hub and a plurality of drive pins are connected via a rubber-integrated damper. It is formed integrally, and a preload step is provided between the drive pin and the end face of the hub, and when the armature is connected to the drive pin by a bolt, a preload is applied to the armature. Features a non-excited operation type electromagnetic brake.