Permanent magnet powerless magnetic brake

Abstract

The invention discloses a permanent magnet powerless magnetic brake which comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises a coil assembly, an inner yoke, an outer yoke and a permanent magnet, one end of the inner yoke is fixedly connected with one magnetic pole end of the permanent magnet, the other magnetic pole end of the permanent magnet is fixedly connected with one end of the outer yoke, and the coil assembly is arranged in a gap between the inner yoke and the outer yoke; the rotor assembly comprises a flange, a face-shaped spring and an armature, and the flange is connected with the armature through the face-shaped spring; and the other end of the inner yoke and the other end of the outer yoke are in tight surface-to-surface contact with the armature. The permanent magnet powerless magnetic brake provided by the invention has the advantages that the permanent magnet generates magnetic force to absorb the armature, thus realizing braking; and the structure is stable, the service life is long, the processing is simple, and the cost is low.

Description

technical field [0001] The invention relates to a brake, in particular to a permanent magnet electromagnetic brake, which belongs to the production field of electromagnetic brakes. Background technique [0002] Brakes are widely used in fields such as metallurgy, construction, chemical industry, food, machinery, transport ships, and article packaging, as braking devices for related mechanical rotating power equipment (mostly motors). [0003] The existing brakes are mainly structural brakes, which rely on the pressure generated by the deformation of the spring to act on the friction assembly, so that the friction assembly relies on the pressure provided by the spring to convert into friction force, thereby realizing braking. The application of this type of structural brake often has the following performance: (1) Spring: The spring is repeatedly compressed at high temperature for a long time, and it is prone to fatigue fracture, so that it cannot provide positive pressure to...

AI Technical Summary

Problems solved by technology

The application of this type of structural brake often has the following performance: (1) Spring: The spring is repeatedly compressed at high temperature for a long time, and it is prone to fatigue fracture, so that it cannot provide positive pressure to the friction component, which in turn causes the torque value of the product to decline, resulting in Non-braking occurs; (2) Friction component: The friction component is connected by a friction disc and two friction plates through glue bonding, and the friction component will generate a large shear force and a certain amount of heat when braking , these will cause the glue to age, which will cause the friction components to fall off. At the same time, due to the force generated by the spring acting on the armature, the friction disc assembly, which drives the shaft to rotate, is tightly clamped between the armature and the cover plate, and the friction plate will fall off. There will be a large gap between the armature and the cover plate, so that the shaft driven by the friction disc assembly cannot be clamped, resulting in the failure to brake; (3) On the grooved end surface of the grooved disc, it is usually necessary to process a lot of Holes are used to meet the installation requirements of the upper structure brake, which makes the processing cost of parts higher and correspondingly increases the production cost of the entire product

To sum up, the structure of the brake is complicated, the processing technology is cumbersome, the cost is high, and the braking effect is unstable.

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