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Rock drill

A technology of rock drilling bits and drilling bits, which is applied in the direction of drill bits, drill pipes, drill pipes, etc., can solve the problems of complex process, rotation-driven key wear, etc., and achieve the reduction of circumferential wear, suppression of torsional bending strength, and improvement of use The effect of longevity

Inactive Publication Date: 2007-05-02
HILTI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of inner groove on the drill bit is complicated to manufacture
In addition, during the limited axial movement allowed by the drilling head, severe friction occurs along the rotary key, which wears the rotary key

Method used

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Embodiment Construction

[0026] According to FIG. 1 together with FIG. 2, the drill bit 1 subjected to rotational and impact loads has a drill rod 2 with an insertion end 3 and a drilling head with a hard material tool tip 4 capable of limited axial movement with a length x of 5 mm. 5. The drill rod 2 and the pot-shaped drilling head 5 are connected to each other in a rotationally interlocking manner with a limited axial movement and by means of a locking device 7 via a connection device with a drive-side connection part 6a and an output-side connection part 6b. . On the end of the drill rod 2 that transmits the shock pulses to the bottom of the drill head 5, there are four radially protruding swivel keys 8 that engage the four edges of the swivel face of the pot-shaped drill head 5. Rotating drive grooves 9 distributed in pairs along the diameter of the tool axis A, these grooves end in the direction of the tool tip 4 at a distance d in front of the tank bottom of the drilling head 5, which correspo...

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PUM

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Abstract

The invention relates to a rock drilling bit with a drill rod (2) at least partially subjected to rotational and impact loads and a drill head (5) equipped with hard material, said drill rod and drill head being connected by a connecting device (6a, 6b) are rotationally form-fittingly engaged with limited axial movement of the drill head relative to the drill rod, and said drill rod and drill head are detachably connected by a locking device (7) interconnected, wherein at one end of the drill rod (2) there is provided at least one radially protruding rotary drive key (8), which engages at least one along the tool on the rotary drive surface of the pot-shaped drilling head (5). The axis (A) extends inside the slot (9) driven by the rotation.

Description

technical field [0001] The invention relates to an at least partially rotary and percussion-driven drill bit for mining rock or rock-like material, in particular for the field of mine engineering. Background technique [0002] This type of drill bit has an at least partly hollow drill rod with a shower channel, a drive end, an insertion end and an output end connection for being inserted into the tool holder of the driven drill, and a connection device with A drilling head, which is non-rotatably connected to the drill rod and detachable by means of a locking device, has a flush hole and a cutting edge made of hard material. [0003] According to US 6021855, in order to improve mining efficiency in a rock drilling bit, a detachably connected blade with a shower hole and made of hard material and an elongated anti-vibration guide body and is arranged on it The drilling head of the rotating driving member can be connected with the drill pipe for limited axial movement. Accor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/62E21B10/36B23B51/00B23B51/06B28D1/14E21B10/38E21B17/04E21B17/046
CPCB23B2251/02B23B2226/75E21B17/046B25D2217/0061E21B10/38B23B51/00
Inventor 沃纳·克莱纳汉斯-沃纳·邦格斯-安布罗休斯乌杜·豪普特曼马丁·里希特
Owner HILTI AG
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