Percussion device and rock drilling machine

Details Percussion device and rock drilling machine Percussion device and rock drilling machine

E - Fixed Constructions

21

B

E21B 1/38 (2006.01) B25D 17/06 (2006.01) E21B 1/26 (2006.01) E21B 4/14 (2006.01)

Patent

CA 2664659

A percussion device (5) for a rock drilling machine (1) including a percussive piston (6; 15) which is reciprocally movable inside a cylinder and an impact receiving element (7;16) with an impact surface (A;A' ), against which the percussive piston is arranged to perform strikes in an impact direction for transferring of percussive energy through Shockwaves to a percussive tool. The percussion device is distinguished by the impact receiving element (7; 16) including a Shockwave modifying portion (9; 17) which extends in a direction opposite to the impact direction as seen from a plane (P; P') through the impact surface (A; A'). The invention also concerns a rock drilling machine and a rock drilling rig.

Dispositif à percussion (5) pour une machine (1) de forage de roches, ledit dispositif à percussion comportant un piston percutant (6 ; 15) capable d'effectuer un mouvement de va-et-vient à l'intérieur d'un cylindre et un élément récepteur d'impact (7 ; 16) présentant une surface d'impact (A ; A') que le piston percutant vient frapper dans une direction d'impact dans le but de transférer l'énergie percutante à un outil de percussion par l'intermédiaire d'ondes de choc. Le dispositif à percussion est caractérisé en ce que l'élément récepteur d'impact (7 ; 16) comporte une partie (9 ; 17) modifiant les ondes de choc qui s'étend dans une direction opposée à la direction d'impact vue d'un plan (P ; P') traversant la surface d'impact (A ; A'). L'invention concerne également une machine de forage de roches et un équipement de forage de roches.

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