Downhole drill head

A down-the-hole drilling and machine head technology, which is applied to drilling equipment, earthwork drilling, and driving devices for drilling in boreholes, etc., can solve the problems of damaged reducer gears, large bearing swings, and large gaps between bearings, etc., to achieve Guarantee the effect of working stability, good stability, and convenient installation and disassembly

Inactive Publication Date: 2009-09-30
迟利民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this structure is: when the nut is not adjusted properly or the nut is worn after a period of use, there will be a problem of excessive clearance between the bearings, resulting in excessive swing of the bearing, which will damage the gear of the reducer

Method used

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  • Downhole drill head

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0020] Such as figure 1 As shown, the down-the-hole drilling head of this example includes a speed reducer and a drill rod holder for installing a down-the-hole drill rod. Wherein the power input end of the reducer is connected to the motor.

[0021] It also includes a sleeve 10 whose rear end is fixedly connected to the reducer through a connection plate 17 , and the connection plate 17 is located at the rear end of the sleeve 10 .

[0022] The transmission shaft 11 is installed in the sleeve 10 through a bearing and a sealing ring. The rear end of the transmission shaft 11 is provided with a connection hole 15 for installing the output shaft of the reducer. The connection hole 15 is a spline hole, which matches with the spline provided on the output shaft of the reducer. The front end of the drive shaft 11 is provided with a flange 8, and the...

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Abstract

The invention relates to a downhole drill head comprising a speed reducer, a drill rod seat used for installing a drill rod of a downhole drill, a sleeve barrel (10) and a transmission shaft (11), wherein the rear end of the sleeve barrel (10) is fixedly connected to the speed reducer, and the transmission shaft (11) is installed in the sleeve barrel (10) by a bearing and a sealing ring; a connecting hole (15) used for installing an output shaft of the speed reducer is disposed at the rear end of the transmission shaft (11), and the front end is provided with a flange (8) which can be connected with the drill rod seat; a hollow aeration passage (12) is arranged on the transmission shaft (11), the front end of the aeration passage (12) is opened, and the rear end is closed; and the middle parts of the sleeve barrel (10) and the transmission shaft (11) are respectively provided with an air hole communicated with the aeration passage (12). The transmission shaft of the downhole drill head and the output shaft of the speed reducer adopt the spilt structure, thereby preventing the original structure from impacting and damaging internal gear wheels of the speed reducer.

Description

(1) Technical field [0001] The invention relates to a down-the-hole drill head, in particular a down-the-hole drilling power transmission mechanism with an air transmission mechanism, the power input end of which is used to connect a reducer, and the power output end is used to connect a down-the-hole drill rod . (two), background technology [0002] The existing down-the-hole drilling head adopts the output shaft of the speed reducer to directly connect the drill rod seat to drive the drill rod to work, that is, the transmission shaft of the machine head and the output shaft of the speed reducer adopt the same shaft. The transmission shaft is installed on the speed reducer base through a slanted column bearing or a straight column bearing, and the gap between the bearings is adjusted through a nut to control the axial and radial movement gaps of the transmission shaft. The main disadvantage of this structure is: when the nut is not adjusted properly or when the nut wears a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/16
Inventor 迟利民迟振亭姜颖
Owner 迟利民
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