Title:
削岩機
Document Type and Number:
Japanese Patent JP2013525651
Kind Code:
A
Abstract:
The present invention relates to a drill comprising a shank adapter (3), a damping piston (5) with a forward end surface (18), a stop end surface (14) for the damping piston (5), a rotation chuck bushing (4) with a forward end surface (16), a stop end surface (17) for the rotation chuck bushing, a impact piston (2) with a brake land (10) with a forward end surface (19), and a brake chamber (8) for braking of the impact speed of the impact piston (2) during idle impacts, which brake chamber (8) has a rear edge (21). According to the invention, the actual idle impact stroke length (L1, L2) of the damping piston is greater than the idle impact braking distance (L3) of the impact piston, where the actual idle impact stroke length (L1, L2) of the damping piston is the shorter of the idle impact stroke length (L1) of the damping piston and the idle impact stroke length (L2) of the rotation chuck bushing.
Inventors:
Johansson, Anders
Application Number:
JP2013509023A
Publication Date:
June 20, 2013
Filing Date:
April 14, 2011
Export Citation:
Assignee:
Atlas Copco Rock Drills Activolag
International Classes:
E21B1/26
Domestic Patent References:
| JP2006512217A | 2006-04-13 | |||
| JP2009521626A | 2009-06-04 | |||
| JPS62259784A | 1987-11-12 | |||
| JP2006512217A | 2006-04-13 | |||
| JP2009521626A | 2009-06-04 | |||
| JPS62259784A | 1987-11-12 |
Attorney, Agent or Firm:
Takao Hamano