Ring type electromagnetic brake capable of achieving adjustment of torque and air gap

Abstract

The invention discloses a ring type electromagnetic brake capable of achieving adjustment of torque and an air gap. The ring type electromagnetic brake comprises an annular brake shell, coil windings, arc brake block mounting plates, brake blocks and adjusting screws. The multiple coil windings are mounted on the annular wall of the brake shell, the multiple adjusting screws are mounted in corresponding shell screw holes, the multiple brake block mounting plates are arranged in central through holes of the brake shell, the multiple brake blocks penetrate through mounting through holes in the brake block mounting plates respectively, all or parts of the brake blocks are permanent magnets, the large ends of the brake blocks are S poles or N poles, and each brake block mounting plate is fixedly connected with the corresponding adjusting screw. According to the ring type electromagnetic brake, the radial moving direction of the brake blocks is changed by changing the current direction of the multiple coil windings, the electromagnetic brake does not depend on a spring any more, the braking and releasing processes are very rapid and reliable, the torque and the air gap can be adjusted, and the high requirement for application of the electromagnetic brake in automatic equipment such as a motor and a robot is met.

Description

technical field [0001] The invention relates to an electromagnetic brake, in particular to a ring type electromagnetic brake with adjustable torque and air gap. Background technique [0002] With the continuous advancement of intelligent manufacturing, the demand for automation equipment such as motors and robots in various industries is increasing. Motors, robots and automation equipment have the characteristics of flexible production and high stability, which put forward higher requirements for brakes as one of the core components, requiring high adjustable degrees of freedom in performance and structure, and high MTBF (mean time to failure) requirements. In addition, with the popularization and updating of robots (industrial and collaborative robots), new structural requirements have been introduced for motor reducers and brakes, which require the brakes to provide a larger space for the shaft to pass through; a larger shaft means that the cables of the robot It can pas...

AI Technical Summary

Problems solved by technology

[0007] 1. Many parts, complex structure and inconvenient installation

There are many main parts, at least 7 kinds, the structure is relatively complicated, the processing technology is also relatively complicated, and the installation is time-consuming and laborious.

[0008] 2. Spring failure and long brake response time

Springs (helical springs or wave springs) are repeatedly deformed at high temperatures for a long time, and problems of elastic force attenuation and structural fatigue fractures will occur, which will cause the positive pressure to decrease or even lose, which will eventually cause the torque of the entire brake to change with time. Decrease with the increase of use time, and even fail, resulting in non-braking phenomenon

The stress release of the spring requires a certain response time, which is much longer than the response time of the electromagnetic force, so the braking response time of the brake will be longer, which is not conducive to rapid braking

[0009] 3. The air gap cannot be adjusted, and the braking effect gradually deteriorates

The distance between the armature and other supporting parts is fixed during production and cannot be adjusted, that is, the air gap cannot be adjusted, resulting in a fixed braking force, and as the spring elasticity weakens, its braking force will only become worse and worse, reducing the brake effect

[0010] 4. The number and torque of coil windings cannot be adjusted

The armature and its supporting parts that realize the braking and releasing functions are all integral parts. If the diameter is too large, the elastic demand and electromagnetic force demand of the spring will be significantly increased. Braking requirements for diameter shafts

[0012] 6. Permanent magnets are prone to failure

The permanent magnet has a large volume, and it is difficult to dissipate heat. It is easy to fail due to demagnetization in the high temperature environment generated by the coil winding for a long time.

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