Ring electromagnetic brake with adjustable torque and air gap

Abstract

The invention discloses a ring-type electromagnetic brake with adjustable torque and air gap, comprising a circular brake housing, a coil winding, an arc-shaped brake block mounting plate, a brake block and an adjusting screw, a plurality of coil windings They are respectively installed on the annular wall of the brake housing, a plurality of adjusting screws are respectively installed in the corresponding screw holes of the housing, and a plurality of brake pad mounting plates are arranged in the central through hole of the brake housing. Passing through multiple mounting holes on the brake pad mounting plate, all or part of the brake pads are permanent magnets, the big end of the brake pads is S pole or N pole, and each brake pad mounting plate is fixed with the corresponding adjustment screw connect. The invention changes the radial moving direction of the brake block by changing the current direction of multiple coil windings, no longer depends on the spring, the braking and releasing process are very fast and reliable, and the torque and air gap can be adjusted, which satisfies the electromagnetic brake requirements. Higher requirements for applications in automation equipment such as motors and robots.

Description

technical field [0001] The invention relates to an electromagnetic brake, in particular to a ring 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, and put forward higher requirements for brakes as one of the core components, requiring high adjustable degrees of freedom in performance and structure, as well as high MTBF (mean time to failure) requirements. In addition, with the popularity and updating of robots (industrial and collaborative robots), new structural requirements have been introduced for motor reducers and brakes, requiring the brakes to provide a larger space for the shaft to pass through; a larger shaft means the robot's cables etc. can pass through the in...

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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