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Damping device for percussion device, percussion device, rock drilling machine and method of damping in a rock drilling machine

The technology of a buffer device and an impact device is applied to drilling equipment and methods, driving devices for combined rotary drilling, earthwork drilling and production, etc., to achieve the effect of energy saving

Active Publication Date: 2015-07-01
EPIROC ROCK DRILLS AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The damping chamber in which the damping piston is arranged is connected to the accumulator and previously known representative dampers of this type are used as hydraulic springs, wherein there is practically no worthwhile provision for achieving a real damping of the reflections emanating from drilling. The reception or consumption of energy and thus produce undesired oscillating system

Method used

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  • Damping device for percussion device, percussion device, rock drilling machine and method of damping in a rock drilling machine
  • Damping device for percussion device, percussion device, rock drilling machine and method of damping in a rock drilling machine
  • Damping device for percussion device, percussion device, rock drilling machine and method of damping in a rock drilling machine

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Embodiment Construction

[0036] figure 1 and figure 2 A rock drilling machine 1 according to the invention is shown in perspective view and axial section, respectively, where 2 designates the housing of the rock drilling machine and 3 designates a shank adapter for connection to a drill steel to form a drill string.

[0037] Typically, the rock drill 1 is provided with a percussion piston 4 for intermittent beating action on the shank adapter 3 . Also applied against the shank adapter 3 is a drill sleeve 5 which is pressed in the striking direction in a manner known per se with the aid of a damping piston 8 . The purpose of the buffer is, for example, to receive and dampen reflected shock waves which occur during drilling. Due to the impact of the percussion piston, in certain operating situations, shock wave reflections tending to drive the shank adapter in a direction opposite to the direction of impact R, via the drill bushing Transfer to buffer piston.

[0038] Apart from the damping device, ...

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Abstract

Damping device for a percussion device of a rock drilling machine (1) having a striking direction (R), including a damping piston (8) for action in an axial direction against a tool to be driven by the percussion device, wherein the damping piston (8) exhibits a piston portion (6), which is received in a damping chamber (7) whereto is connected a damping flow circuit including a supply conduit (14), and wherein an outlet conduit (15) is connected to the damping chamber. A damping flow regulator (10) being controllable in respect of damping flow in the damping flow circuit is arranged in said supply conduit (14), and a control means (11) is arranged to emit control signals to the damping flow regulator (10) for regulating said damping flow. The invention also concerns a percussion device, a rock drilling machine and a method.

Description

technical field [0001] The invention relates to a damping device for a percussion device of a rock drilling machine, comprising a damping piston received in a damping chamber, to which a damping flow circuit comprising a supply duct is connected, and wherein the outlet duct is also connected to The buffer room. The invention also relates to a buffering method, a percussion device and a rock drilling machine. Background technique [0002] The purpose of damping devices for percussion devices of rock drilling machines is essentially to protect the rock drilling machine and the drill steel from harmful reflected shock waves which occur during drilling. The cushioning device is also intended to provide enhanced performance for transmitting the feed force of the drill steel to the rock by ensuring rock contact during drilling. [0003] A damping device for percussion machines is previously known from US 4,993,504, comprising a first chamber connected to a reservoir and a second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D17/24E21B1/26E21B19/08
CPCB25D17/245B25D2209/005B25D9/20E21B6/04B25D2250/195B25D9/12B25D9/10B25D17/24E21B1/26E21B19/08
Inventor 乔纳斯·亨利松埃里克·阿尔登本特·法尔克乔纳斯·辛纳斯塔德
Owner EPIROC ROCK DRILLS AB
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