Uniaxial structure of coal cutter cutting part

Abstract

The invention brings forward a uniaxial structure of a coal cutter cutting part. An internal spline of a gear shaft (4) is connected with an explosion-preventing motor. The gear shaft (4) drives a driving mechanism through an outer gear and is supported in a cutting part housing (7) through a first bearing (3) and a second bearing (5). An outer ring of a bearing (3) on a coal wall is installed on an inner hole of an end cover (2) which is fixed on a housing (7) through a bolt (11) and a gasket (10). A bearing (5) on an operation side is fixed on the housing (7). The outside of the housing (7) is provided with an oil seal (6) which can be detached from two sides. The oil seal (6) is fixed on the housing (7) through a baffle ring (8). An inner hole on the coal wall of the gear shaft (4) is provided with a sealing plug (1) having an O-shaped sealing ring (9). The uniaxial structure of the coal cutter cutting part has following beneficial effects: detachment, maintenance and repair can be conveniently carried out to the greatest extent; intensity of labor is reduced; maintenance and repair time can be saved; and working efficiency of a working face of the overall coal cutter can be improved.

Description

technical field [0001] The invention relates to a shaft of a cutting part of a coal mining machine. Background technique [0002] In the current mainstream electric traction shearer, the structural design of the first shaft of the cutting section is very important. The first shaft of the cutting section has the highest speed among the entire transmission parts, and is the driving point of the entire transmission part, and can only be inspected and repaired from the coal wall side. operate. The first shaft of the cutting part of the coal mining machine is similar in structure, but in many designs, the gear shaft (4) with the inner ring of the second bearing (5) cannot be pulled out from the side of the coal wall; the rotational speed of the first shaft of the cutting part is generally 1480r / min or so, so the oil seal (6) is a vulnerable part that needs to be replaced frequently. In the design of one axis of part of the cutting part, the oil seal (6) cannot be drawn out from ...

AI Technical Summary

Problems solved by technology

The first shaft of the cutting part of the coal mining machine is similar in structure, but in many designs, the gear shaft (4) with the inner ring of the second bearing (5) cannot be pulled out from the side of the coal wall; the rotational speed of the first shaft of the cutting part is generally 1480r / min or so, so the oil seal (6) is a vulnerable part that needs to be replaced frequently. In the design of one axis of part of the cutting part, the oil seal (6) cannot be drawn out from the coal wall side; the oil seal (6) can be pulled out from the operation side (ie The motor side) needs to be disassembled when pulling out the cutting motor. Disassembling the cutting motor is a helpless choice that wastes manpower and material resources when the underground space is extremely limited.

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