Cutting arm of development machine and development machine

Abstract

The invention provides a cutting arm of a development machine and the development machine. The cutting arm of the development machine comprises a cutting head, a cutting main shaft, an outer cylinder, a suspended arm cylinder and a bearing set, wherein a bearing is fixedly arranged on the suspended arm cylinder, the outer cylinder is connected with the suspended arm cylinder through the bearing, and a bending moment generated during cutting can be directly transmitted to the suspended arm cylinder through the outer cylinder and the bearing; and the cutting head is fixedly connected to the front end of the outer cylinder and is connected with the cutting main shaft through key connection, and thus torsion transmission can be realized. The cutting arm provided by the invention can be used for removing an acting force of the bending moment to the cutting main shaft, and thus the safety of the cutting main shaft can be increased; and simultaneously, relative rotating positions of the outer cylinder and the suspended arm cylinder are far away from the cutting head, and thus the service life for rotary sealing can be effectively prolonged.

Description

technical field [0001] The invention relates to the field of coal mining machinery, in particular to a roadheader cutting arm and a roadheader with the cutting arm. Background technique [0002] In the cutting arm of the current roadheader, the bending moment received by the main shaft is transmitted to the cantilever barrel through the bearing, and the cutting main shaft not only bears the torque during cutting work, but also bears the bending moment during lateral cutting, thus reducing the Cutting spindle safety. In addition, the relative rotation joint between the cutting head shaft and the cantilever barrel is generally inside the cutting head. When the cutting head is working, the cutting head will extend into the coal and rock for cutting, so that the coal, rock, etc. The powder is easily squeezed into the gap between the cutting head shaft and the cantilever barrel, causing seal failure, damaging the bearing, and reducing the service life of the cutting arm. Conte...

AI Technical Summary

Problems solved by technology

[0002] In the cutting arm of the current roadheader, the bending moment received by the main shaft is transmitted to the cantilever barrel through the bearing, and the cutting main shaft not only bears the torque during cutting work, but also bears the bending moment during lateral cutting, thus reducing the Cutting Spindle Safety

In addition, the relative rotation joint between the cutting head shaft and the cantilever barrel is generally inside the cutting head. When the cutting head is working, the cutting head will extend into the coal and rock for cutting, so that the coal, rock, etc. The powder is easily squeezed into the gap between the cutting head shaft and the cantilever barrel, causing seal failure, damaging the bearing, and reducing the service life of the cutting arm

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