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An Eccentric Hob Translating Cutter for Rectangular Cutting Section of Hard Rock

A technology of rectangular cutting and eccentric rolling, which is applied in mining equipment, earthwork drilling, tunneling, etc.

Active Publication Date: 2017-10-10
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes an eccentric hob translational cutter head for a rectangular cutting section of hard rock, which solves the problem of the application of the eccentric multi-axis hob cutter head in the hard rock formation in the prior art

Method used

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  • An Eccentric Hob Translating Cutter for Rectangular Cutting Section of Hard Rock
  • An Eccentric Hob Translating Cutter for Rectangular Cutting Section of Hard Rock
  • An Eccentric Hob Translating Cutter for Rectangular Cutting Section of Hard Rock

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Embodiment 1

[0023] Such as Figure 1~3 As shown, the present invention provides a kind of eccentric hob translational cutterhead for hard rock rectangular cutting section, including cutterhead body 2, cutter, drive system, cutterhead body 2 is driven by drive system, and described cutterhead body 2 is a spoke-type rectangular cutter body; the tool includes a positive hob 4, wherein the positive hob 4 is installed on the positive hob tool seat 3, and the positive hob tool seat 3 and the rotary shaft 7 of the tool seat are fastened and connected as a whole by bolts , the tool seat rotating shaft 7 is connected to the cutter head body 2 through a bearing, and the center of the positive hob tool seat 3 is eccentric with the center of the tool seat rotating shaft 7.

[0024] The positive hob holder 3 is equipped with scrapers 5 at both ends of the tool rolling direction; side hobs 1 are distributed around the cutter head body 2, and the side hobs 1 extend obliquely outward at an angle of 45° t...

Embodiment 2

[0032] Such as Figure 4 , 5 As shown, it is the application of the new cutter head on the rectangular jacking pipe. Four sets of the new cutter head are arranged at the upper left, lower left, upper right, and lower right positions of the front end of the shield body, and the maximum offset distance of the offset mechanism is used as the cutter head. Disc spacing, while ensuring that the four groups of cutter heads are in the same vertical plane. Each group of new cutterheads is driven by four sets of eccentric drive shafts, and the new cutterheads work under the push of the main jack cylinder to realize the excavation of hard rock tunnels with special-shaped cross-sections.

[0033] Other structures are with embodiment 1.

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Abstract

The invention provides an eccentric hob horizontal-moving cutterhead used for a hard rock rectangular cutting section. The application of an eccentric multi-shaft hob cutterhead in the prior art to hard rock stratums is achieved. The eccentric hob horizontal-moving cutterhead comprises a cutterhead body, hobs and a driving system. The cutterhead body is driven by the driving system and is a spoke type rectangular cutterhead body; the hobs comprise positive hobs which are mounted on positive hob holders, and the positive hob holders are connected with hob holder rotating shafts into a whole in a fastened mode through bolts; and the hob holder rotating shafts are connected to the cutterhead body through bearings, and the center of each hob holder and the center of the corresponding hob holder rotating shaft are eccentric. The eccentric hob horizontal-moving cutterhead is driven by multiple eccentric driving shafts to make horizontal-connecting-rod movement, and thus the abrasion loss of the hobs is not affected by mounting positions; the positive hobs are eccentrically arranged and have the characteristics that the hobs can horizontally move along with the cutterhead and automatically rotate, and the problem that excavation dead zones exist when hobs and other crushing type tools are used for excavation in an eccentric multi-shaft movement mode is solved; and the cutterhead can conduct excavation in a multi-cutterhead combined mode, and can adapt to special-shaped excavated faces with different sizes.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction machinery, and in particular relates to an eccentric hob translational cutter head for a rectangular cutting section of hard rock. Background technique [0002] In recent years, the degree of mechanization in the field of tunnel excavation has been rapidly increasing from the viewpoint of safety, energy saving, and improvement of the working environment. In the construction of mountains and subway tunnels, the application of hard rock roadheaders has attracted attention from the consideration of safety, necessity of rapid construction and economical efficiency. Although the construction performance of hard rock roadheaders is mainly concentrated in the field of water diversion tunnels, and most of them are circular cutterhead shields, but in the excavation of roads, railway tunnels, municipal and subway tunnels, hard rock roadheaders are also in great demand. With the gradual expansio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 范磊王小涛薛广记董艳萍龚廷民蒋鹏鹏刘娇刘晓宇
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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