Compact type easily-maintained tooth holder

Abstract

The invention relates to a compact type easily-maintained tooth holder. The compact type easily-maintained tooth holder comprises a tooth holder body and a tooth sleeve. The tooth sleeve is arranged in a main hole of the tooth holder body in a tight fit manner, the wall thickness of the tooth sleeve ranges from 3 to 5 mm, the hardness of the tooth sleeve is 58 to 62 HRC, an O ring mounting grooveis formed in the outer wall of the tooth sleeve, an O ring is arranged in the L ring mounting groove, an oil hole is formed in the tooth holder base, an opening in the inner end of the oil hole communicates with the main hole, and is located in the inner side of the O ring, an outer end opening of the oil hole is formed in the outer surface of the tooth holder body, a segment of thread hole is formed in an opening in the outer end of the oil hole, and under the use state, blockage is achieved through a screw plug. The tooth holder is small in size, and convenient to maintain, can be used for athin-coal-layer small roller, and capable of improving the reliability and adaptation of the roller.

Description

technical field [0001] The invention relates to a pick tooth seat used on a coal shearer drum, and belongs to the technical field of coal mining equipment. Background technique [0002] The gear seat is an important part of the shearer drum, which is welded on the drum body, and the cutter is installed to realize the coal cutting of the drum. For a long time, in order to ensure the strength and reliability of the tooth seat, the body of the tooth seat is too large, and at the same time, a tooth sleeve is installed to protect the tooth seat body, which limits the performance of the drum, especially for small drums with thin coal seams, the size of the tooth seat is too large, It cannot be used on small-diameter drums. Therefore, only a small series of tooth holders and small picks can be selected, which reduces the cutting performance. At the same time, the height of the drum blades is limited, and the coal loading performance of the drum is reduced. In addition, the gear se...

AI Technical Summary

Problems solved by technology

For a long time, in order to ensure the strength and reliability of the tooth seat, the body of the tooth seat is too large, and at the same time, a tooth sleeve is installed to protect the tooth seat body, which limits the performance of the drum, especially for small drums with thin coal seams, the size of the tooth seat is too large, It cannot be used on small-diameter drums. Therefore, only a small series of tooth holders and small picks can be selected, which reduces the cutting performance, and at the same time limits the height of the drum blades, reducing the coal loading performance of the drum.

In addition, the gear seat with the gear sleeve installed is more prone to the phenomenon of the gear sleeve falling off during the high-speed rotation of the drum. The replacement of the gear sleeve requires special calipers, which is more troublesome.

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