US 12,005,558 B2
Rock drilling arrangement and machine
Antti Koskimaki, Tampere (FI); Mikko Hamalainen, Tampere (FI); and Matti Viinikka, Tampere (FI)
Assigned to Sandvik Mining and Construction Oy, Tampere (FI)
Appl. No. 17/436,732
Filed by SANDVIK MINING AND CONSTRUCTION OY, Tampere (FI)
PCT Filed Mar. 16, 2020, PCT No. PCT/EP2020/057161
§ 371(c)(1), (2) Date Sep. 7, 2021,
PCT Pub. No. WO2020/183031, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 19162773 (EP), filed on Mar. 14, 2019.
Prior Publication US 2022/0176535 A1, Jun. 9, 2022
Int. Cl. B25D 17/28 (2006.01); B25D 9/14 (2006.01); E21B 4/14 (2006.01)
CPC B25D 17/28 (2013.01) [B25D 9/145 (2013.01); E21B 4/14 (2013.01); B25D 2250/051 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rock drilling arrangement comprising:
an impact device including a frame, a plurality of pressure chambers in the frame, and a piston arranged in the impact device;
a rear mounting arrangement arranged for attaching the impact device to a carriage, the rear mounting arrangement having a front side and a back side and including two fastening lugs having a through hole as a mounting hole and arranged perpendicular in relation to an axial direction of the piston;
a front mounting arrangement arranged for attaching the impact device to a machine component;
at least one fore pressure accumulator arranged on the front side of the rear mounting arrangement in the axial direction of the piston; and
at least one rear pressure accumulator arranged on back side of the rear mounting arrangement, the at least one fore pressure accumulator and the at least one rear pressure accumulator being connected to one of the plurality of pressure chambers and arranged to absorb pressure fluctuations in the plurality of pressure chambers.