Driving and rake lifting device of center driving thickener

Abstract

The invention discloses a driving and rake lifting device of a thickener. The driving and rake lifting device is characterized in that a rake lifting device and a driving device are two mutually independent devices, wherein when mud needs to be scraped, only a motor needs to be started; when a rake needs to be lifted up or fall down, only a cylinder needs to be internally filled with hydraulic oil; the two operations do not interfere with each other; and the mud can also be scraped simultaneously when the rake is lifted steadily. The rake lifting device is lifted up or falls down by virtue of a hydraulic system. A driving shaft of the driving device is supported by rolling bearings; one end, along the axis, of the driving shaft is provided with a thrust bearing; the driving shaft is connected with a motor direct-connection type speed reducer at the upper part of the driving shaft through a coupler, and therefore a traditional worm gear speed reducer is omitted, not only is the structure simplified, but also the driving efficiency is enhanced.

Description

technical field [0001] The invention relates to a transmission and rake lifting device of a concentrator, which has the advantages of simple structure, convenient maintenance and high transmission efficiency. Background technique [0002] The existing transmission rake lifting device drives the transmission shaft to rotate after being decelerated by a motor, a gear, and a worm gear reducer to scrape mud. A lifting screw, a reduction motor, and a bevel gear device are installed on the upper part of the drive shaft, wherein a nut is installed in the inner hole of the bevel gear, and the thread of the nut matches the thread of the lifting screw. Since the nut is fixed and cannot be moved, it can only Rotate, but the lifting screw is provided with a stop pin and cannot rotate, so when the nut rotates, the lifting screw will be driven to move up and down, thereby driving the drive shaft to move up and down. [0003] Because the prior art adopts the worm gear reducer, the structu...

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Problems solved by technology

[0003]Because the existing technology adopts worm gear reducer, the structure is relatively complicated, the processing is difficult, the external size is large, and the efficiency of ordinary worm gear transmission is only 0.5~ 0.8

[0004]In addition, because the lifting rake device is realized by lifting the drive shaft in the prior art, a very long guide key is processed on the drive shaft, which acts as a To guide and lift, and transmit torque at the same time, therefore, the requirements for assembly and processing are very high

Moreover, the concentrator also requires the drive shaft to rotate and scrape mud during the process of lowering the rake. At this time, the guide key will be squeezed with the keyway of the worm wheel, and the resistance when putting the rake increases, which will easily roughen the keyway.

Moreover, the transmission shaft is supported by a long sliding bearing, which has a large resistance.

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