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Sliding bearing raise-boring machine inserted tooth hob capable of being disassembled quickly

A technology for sliding bearings and raise drilling rigs, which is applied to drill bits, earthwork drilling, drilling equipment, etc. It can solve the problems of limited material selection, complicated process operation, and high price, so as to achieve long service life, reduce manufacturing costs, and improve mechanical properties. Effect

Active Publication Date: 2019-01-29
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, in order to meet the dual requirements of the wear resistance and impact resistance of the knife shell, it is necessary to use a single metal wear-resistant material or a bimetal casting material. The single-metal wear-resistant material must take into account the dual requirements of wear resistance and impact resistance. Expensive, with limited material choices; bimetallic casting materials require a bimetallic casting process, which is very complex and costly

Method used

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  • Sliding bearing raise-boring machine inserted tooth hob capable of being disassembled quickly

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Embodiment Construction

[0022] Such as figure 1 The insertable hob for the sliding bearing raise drilling machine shown can be quickly disassembled, including a cutter housing, an assembled cutter shaft and a rock-breaking insert 3; the cutter housing and the assembled cutter shaft are connected through a sliding bearing 4; the The rock-breaking insert 3 is installed on the outer wall of the cutter housing.

[0023] The knife case includes an outer knife case 1, a knife case core 2 and a gland 5 positioned at both ends of the knife case core 2, and the outer knife case 1 and the knife case core 2 are assembled and fixedly connected by a shrink-fit method; the gland 5 It is fixedly connected with the cutter shell core 2 through gland bolts 6 .

[0024] The knife case adopts a split design, and the knife shell core 2 is forged with bearing steel, which has high impact resistance. The knife shell core 2 is chrome-plated at the contact part with the sliding bearing 4 to improve the wear resistance of th...

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Abstract

The invention discloses a sliding bearing raise-boring machine inserted tooth hob capable of being disassembled quickly. The sliding bearing raise-boring machine inserted tooth hob capable of being disassembled quickly comprises a hob shell, a hob shaft and a rock breaking inserted tooth. The hob shell and the hob shaft are connected through a sliding bearing. The rock breaking inserted tooth is installed on the outer side wall of the hob shell. The hob shell is designed in a spilt mode, a hob shell core is forged by bearing steel and has higher impact resistance, and the surface on which thehob shell core is in contact with the sliding bearing can be subjected to chromizing to improve the wear resistance of the surface; an outer hob shell is forged with a single metal wear-resistant material to further improve the mechanical properties of the outer hob shell, and a split structure can make full use of the advantages of the two materials and simplify the bimetal casting process, so that manufacturing cost of the hob shell is reduced. When the rock breaking inserted tooth is worn and needs to be replaced, the outer hob shell and the hob shell core can be quickly disassembled by thesliding bearing and replaced with a new hob outer shell and a new hob shell core, and then the new hob outer shell and the new hob shell core are mounted on the hob shaft through the sliding bearing.

Description

technical field [0001] The invention relates to the technical field of mine exploration. Specifically, it is a quick-detachable insert hob for a sliding bearing raise drilling rig. Background technique [0002] In extremely hard rock conditions, the existing cemented carbide rock-breaking hobs wear fast and have a low service life, and the life is limited to the wear of the rock-breaking inserts. When the rock-breaking inserts reach the end of their service life, all rock-breaking hobs need to be replaced , the cost is extremely high. Simultaneously, the outer wall surface of the cutter casing of the rock-breaking hob in contact with the rock face requires high wear resistance, but the surface of the cutter casing in contact with the sliding bearing should have high impact resistance. In the prior art, in order to meet the dual requirements of the wear resistance and impact resistance of the knife shell, it is necessary to use a single metal wear-resistant material or a bi...

Claims

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Application Information

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IPC IPC(8): E21D9/10E21B10/56E21B10/633
CPCE21B10/56E21B10/633E21D9/1006
Inventor 谭昊谭杰刘志强宁方波宋朝阳张连军
Owner BEIJING CHINA COAL MINE ENG CO LTD
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