B - Operations – Transporting – 25 – D
Patent
B - Operations, Transporting
25
D
B25D 17/24 (2006.01)
Patent
CA 2076531
The invention relates to an arrangement for the axial bearing in a drilling machine. The drilling machine comprises a frame (6), a percussion device (1) fitted in the frame, and a shank ( 2 ) positioned on an axial extension of the percussion device. The frame (6) further comprises an axial bearing formed by a number of pistons (4a, 4b) to receive axial forces acting on the frame (6) through the shank (2). The length of travel of some pistons (4b) towards the forward portion of the drilling machine is limited so that when they are in their forward position and the shank (2) is supported by the pistons (4a, 4b), the shank (2) is substantially at its optimal percussion point. (Fig. 3)
La foreuse décrite comporte un cadre (6), un dispositif à percussion (1) fixé dans ledit cadre, et une partie de queue (2) située sur le prolongement axial du dispositif de percussion. La cadre (6) comporte un outre un palier axial constitué par une pluralité de pistons (4a, 4b) devant recevoir les forces axiales agissant sur le cadre (6) par l'intermédiaire de la queue (2). La course de certains pistons (4b) vers la partie avant de la foreuse est limitée de sorte que lorsqu'ils se trouvent dans leur position antérieure et que la queue (2) se trouve maintenue par les pistons (4a, 4b), la queue (2) est située sensiblement à son point de percussion optimal.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Tamrock Oy
LandOfFree
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