Title:
A rotation unit, a rock-drilling unit, and the rock-drilling method
Document Type and Number:
Japanese Patent JP6017002
Kind Code:
B2
Abstract:
The invention relates to a rotation unit, rock drilling unit and method for rock drilling. The rotation unit (7) comprises a main shaft (17) that is rotated around its longitudinal axis by means of a rotating motor (22). The main shaft comprises a tubular outer shaft (18) and an inner shaft (19) arranged inside the outer shaft. The outer shaft is supported to a body of the rotation unit and is configured to transmit axial forces, whereas the inner shaft is configured to transmit rotation and torque.
Inventors:
Turmeric Jarvi, Tapio
Application Number:
JP2015198230A
Publication Date:
October 26, 2016
Filing Date:
October 06, 2015
Export Citation:
Assignee:
Sandvik Mining and Construction Owai
International Classes:
E21B3/02; E21B7/00
Domestic Patent References:
| JP2014510862A | ||||
| JP41000122B1 | ||||
| JP3029587U |
Foreign References:
| US20140034387 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation