Incision speed reducer for development machine of coal mine

Abstract

The invention relates to a cutting speed reducer for a coal mine development machine, comprising a case, an input shaft and a planetary deceleration assembly connected with the input shaft. The cutting speed reducer is characterized in that the case of the cutting speed reducer is a cylinder respectively provided with an input end flange and an output end flange at both ends and a partition board. The invention simplifies the case structure that can be in cast form, thereby improving the integrated intensity of the case, avoiding the problem of weld stress convergence existing in a welded structure, realizing optimum transmission load balancing, improving the transmission efficiency and guaranteeing processing and installation accuracy; therefore, the internal structure of the whole speed reducer is simple, practical and compact. A needle bearing is selected and used on a low speed level planetary wheel, thereby being capable of meeting the requirement for structure configuration and the requirements for work load and service life, being capable of greatly reducing the volume of spare parts inside the speed reducer and the case, and being conducive to the design requirement that the speed reducer must be installed and connected inside the main body. Therefore, the cost of the whole speed reducer is greatly reduced, and the speed reducer is more suitable for matching transmission of low-power development machines.

Description

technical field [0001] The invention relates to a speed reducer, in particular to a cutting speed reducer for a coal mine roadheader. Background technique [0002] Coal mine roadheader is a comprehensive mechanized tunneling equipment used for coal and semi-coal underground roadway cutting, loading and transportation. The working environment is poor; the driving power of the working mechanism is large, the cutting load varies widely, and there are often short-term overloads, impact loads, and large vibrations. To continuously dig coal in the roadway, the entire section must be excavated during operation, and the cutting mechanism is required not only to have a certain torque and speed to cut coal and rock, but also to be able to swing up and down, left and right. The whole equipment is generally composed of cutting mechanism, shipping mechanism, traveling mechanism, hydraulic system, spray system, electrical system, and fuselage. Among them, the cutting mechanism is the ma...

AI Technical Summary

Problems solved by technology

Since the brackets for the propulsion cylinder must be installed on both sides of the reducer box, a welded basket-shaped structure must be adopted. The main section is a rectangular cross-section. structure, the output shaft and the low-speed planetary carrier are integrated and both ends are supported on the bearings, so a bearing support seat must be installed in the box to make the structure more complicated and the processing difficulty increased

The structure of the reducer structure of the cantilever type longitudinal axis cutting mechanism of the coal mine roadheader in the prior art has the following problems: 1. The center of gravity of the cutting mechanism is forward, and under the action of the reaction force generated during the lateral swing cutting, it is easy to cause the roadheader to generate a large Vibration affects the working conditions of parts and even the whole machine, thereby reducing the service life and even causing safety and reliability problems; 2. This kind of complex structure of the welded structure reducer box has many stress concentration points, and it is easy to occur under the action of vibration during work. Fatigue crack defects; 3. The output shaft and the low-speed planetary carrier are integrated and both ends must be supported on the bearings, and the processing of itself and the box is difficult;

Images