Lifting trolley

Abstract

The invention relates to a hoisting trolley. The hoisting trolley comprises a hoisting mechanism, a traveling mechanism and a machine frame used for mounting the hoisting mechanism and the traveling mechanism, wherein the hoisting mechanism comprises a reel and a reel driving device; the traveling mechanism comprises traveling wheels and a traveling driving device; the reel is rotationally connected with the machine frame; the reel driving device drives the reel to rotate by using a built-in multi-disc brake permanent magnet motor as a prime motor; a driving output gear of the reel driving device is meshed with an inner gear ring of the reel; a multi-disc brake device is arranged in the rear part of a rotor of the built-in multi-disc brake permanent magnet motor; during non-energization, a brake elastic device pushes a brake disc assembly to form braking; after energization, the braking force exerted on the brake disc assembly by the brake elastic device is removed by a switching-off power device. The hoisting trolley is light in weight, small in size, wide in speed regulating range, convenient to operate and control, safe and reliable, and the manufacturing cost and the operation cost can be obviously reduced.

Description

technical field [0001] The invention relates to a lifting trolley suitable for bridge cranes and other equipment. Background technique [0002] The lifting trolley is usually composed of a frame, a lifting mechanism and a walking mechanism installed on the frame. The main function of the lifting mechanism is to wind or release the wire rope through the reel, and place the object connected to the end of the wire rope at a certain height. , the driving device of the reel usually uses an AC asynchronous motor as the prime mover, and is connected with the reel drive through a corresponding reduction device, so as to convert the high speed of the AC asynchronous motor into the low speed required for the work of the reel, and the traveling mechanism includes A number of road wheels installed on the front and rear end beams of the frame respectively to support and drive the lifting trolley to move horizontally. The road wheels usually include driving wheels and driven wheels, where...

AI Technical Summary

Problems solved by technology

Since the reel is driven by an AC asynchronous motor, a very high gear ratio is required, so the reel drive mechanism in the prior art is equipped with a huge reducer, and usually requires a separate configuration of supporting devices such as brakes, so the lifting trolley is very large. , very heavy, not only the lifting trolley itself requires more manufacturing materials, higher manufacturing costs, larger site space, greater power consumption and higher maintenance costs, but also needs to increase the cost of related supporting devices load-bearing capacity, resulting in a larger overall crane size and higher cost

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