Cutting part of stepless speed changing coal cutter based on hydraulic closed transmission system

Abstract

The invention discloses a cutting part (rocker arm) of a stepless speed changing coal cutter based on a hydraulic closed transmission system. The cutting part comprises a cutting part (rocker arm) shell, a rotary drum, an electric machine, a pump and a motor, wherein the electric machine, the pump and the motor are arranged in the cutting part (rocker arm) shell. The cutting part is characterized by also comprising a power transmission mechanism connecting the motor with the rotary drum, and a hydraulic pipeline for connecting the motor with the pump so as to form the hydraulic closed transmission system among the motor, the hydraulic pipeline and the pump, wherein an oil tank is arranged between the motor and the pump, and the hydraulic pipeline is arranged in the oil tank. In the power transmission system of the cutting part, the electric machine is used for driving the pump, the pump is used for driving the motor, and the motor is used for transmitting power to the rotary drum through the power transmission mechanism. A user can adjust the displacement of the pump and the motor manually or automatically to realize stepless adjustment of the rotating speed of the rotary drum according to the condition of a working surface. The cutting part has the beneficial effects that the output speed of the cutting part (rocker arm) of the coal cutter is controlled through volumetric speed adjustment, thereby realizing the stepless change of output rotating speed of the cutting part (rocker arm); and the cutting part is convenient and fast to operate and has strong practicability.

Description

technical field [0001] The invention belongs to the field of coal shearers, and in particular relates to a cutting part (rocker arm) with a novel structure capable of realizing stepless output variable speed. Background technique [0002] At present, the cutting part (rocker arm) of the known shearer is all one speed. Even if two to three speeds are considered in the design, it is necessary to dismantle the cutting part (rocker arm) and replace the transmission when changing the speed. gear to achieve. [0003] Chinese patent CN200520089570.9 discloses a speed change device for the cutting part of the roadheader, which is mainly composed of a cutting head, a transmission housing, and a motor. A No. 1 coupling is fixedly connected to the motor shaft in the reducer housing. Shaft, a No. 1 shaft gear is fixedly installed on the No. 1 shaft; a No. 2 shaft is fixedly connected with a No. 2 coupling, and a No. 2 shaft large gear is fixed on the right side of the No. 2 shaft, and ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a shearer cutting part (rocker arm) with a new principle and structure in order to overcome the shortcomings of the existing cutting part (rocker arm) drum that cannot be continuously variable and cannot be optimized in real time according to working conditions. ), the cutting part (rocker arm) can conveniently realize the stepless speed change of the cutting part (rocker arm) drum through the hydraulic transmission system

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