Rope-free hoister with force increasing mechanism brake

Abstract

The invention discloses a rope-free hoister with a force increasing mechanism brake, which comprises steel support beam assemblies, a cage, linear motor driving devices, a positioning and guiding device, a braking device, a safety gear and a bumper. The elongated steel support beam assemblies are arranged on the inner wall of a shaft along a vertical direction. Linear motor stators of the linear motor driving devices are arranged on the front surfaces of steel support beam assemblies. Concave elongated grooves are formed on the two lateral surfaces of each steel support beam assembly. The force increasing caliper brake is braked on the bottom surfaces of the concave elongated grooves. Main positioning and guiding wheels of linear motor guiding and positioning wheel groups are connected in the concave elongated grooves for rolling. The force increasing caliper brake of the rope-free hoister is provided with a force increasing link mechanism, and has a small volume, light weight and high braking capacity. The rope-free hoister with the force increasing mechanism brake has triple protection devices which are the brake for power-off braking, the linear motors for power-off generation braking and the safety gear with an overspeed braking protection function respectively, so the safety and reliability of the hoister are ensured.

Description

technical field [0001] The invention belongs to the field of cordless lifting, and in particular relates to a cordless hoist with a booster mechanism brake. Background technique [0002] Linear motor is a new type of power machinery that does linear motion. It is applied in the field of lifting, which can realize the lifting mode without wire rope and without lifting machine room, forming a so-called cordless hoist, which can greatly increase the conveying capacity and conveying distance of the hoist. . This kind of cordless hoist mainly has two driving structure types: induction linear motor and linear synchronous motor. Among them, the linear synchronous motor has high force index, large working air gap and large thrust, and is recognized as the most suitable driving source for cordless hoists. [0003] Most of the current cordless hoists adopt a drive structure with the same working air gap on both sides and double-sided linear motors arranged face to face. Although it c...

AI Technical Summary

Problems solved by technology

[0003] Most of the current cordless hoists adopt a drive structure with the same working air gap on both sides and double-sided linear motors arranged face to face. Although it can offset most of the normal attraction between each other and reduce the positive pressure of the car's roll, its structure is complex and takes up much space. The space is large; the driving structure of the unilateral planar linear motor is simple, and the applicable occasions are wider, but when the lateral width of the motor is large, the normal force is large, the stress is concentrated, and there are high requirements for support

Since the linear motor cordless hoist has no counterweight and the lifting load is large, the brake drive power is large, the volume is large, and it is difficult to realize, which is the key bottleneck problem that limits the engineering application of the linear motor cordless hoist.

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