Gearless tractor with cantilever support

Abstract

The invention discloses a gearless tractor with a cantilever support. The gearless tractor with the cantilever support comprises a rotating shaft, a support bearing, a support shaft sleeve, cantilever support plates, a traction wheel, a stator casing, a stator core with a winding, a rotor support, a permanent magnet, a front end cover and a rear end cover. The cantilever support plates are arranged on two sides of the traction wheel. The support shaft sleeve is connected to the front ends of the cantilever support plates. The traction wheel is mounted on the rotating shaft. The rotating shaft is connected with the front end cover through the support bearing. The gearless tractor with the cantilever support has the advantages that by the structure of the cantilever support, load of the rotating shaft and the bearing on the traction wheel is greatly reduced, material cost of the rotating shaft and the bearing is lowered, service lives of the rotating shaft and the bearing are prolonged, the cantilever support plates can be processed after being connected with the front end cover, positional accuracy of the support bearing is guaranteed, and mounting is facilitated.

Description

Technical field [0001] The present invention involves the field of electric motor technology, and specially involves a gear -free traction machine supported by a cantilever with a cantilever. Background technique [0002] With the rapid development of my country's economy and the continuous advancement of urbanization, it has driven the development of the construction industry. The demand for elevators will be increased, and at the same time, a large number of public infrastructure construction, energy conservation transformation and replacement and exports will promote the output of elevators in my country.In 2004, elevator sales reached 110,000 units, accounting for about one -third of the world's elevator sales. In recent years, the Chinese elevator market has grown at a rate of nearly 30 % per year.The standards should be increased by 800 to 1 million elevators. [0003] At present, there are two main structures for high -speed large -load elevators. There are two main struct...

AI Technical Summary

Problems solved by technology

[0003] At present, the gearless traction machine used for high-speed and heavy-duty elevators has two main machine structures. One is the cantilever structure of the traction wheel, that is, the traction sheave is placed at the shaft extension of the traction machine, which makes the traction machine The rotating shaft and bearings at the shaft extension bear a very large load. The design of the rotating shaft and the selection of bearings need special consideration, which increases the material cost of the motor body and greatly affects the life of the traction machine; the other is It is supported on both sides of the traction sheave, so that the force on the shaft and bearing at the traction sheave is greatly reduced, but the two support parts need to be processed separately. By designing the support base as the installation reference, the processing accuracy requirements for the two support parts Higher, which brings a certain difficulty to the assembly of the whole machine

In the existing technology, the patent number: CN201020001990.8, the name is "a traction machine with support", and the traction wheel and the motor body are placed between the two supports at the same time, so that the span of the two bearings is increased. , in order to ensure the reliable operation of the traction machine, there is a high requirement for the stiffness of the shaft, and the structure is complex, which indirectly increases the manufacturing cost of the traction machine

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