Hammer drill

Abstract

An intermediate shaft 3 operatively coupled to a motor and a tool holding sleeve 11 for holding a tip end tool 22 are disposed in a housing 1 in parallel with each other. A motion converting member 5 for converting rotary motion to reciprocating motion thereby to operate the tip end tool 22 to hammer is rotatably provided on the intermediate shaft 3 . A first clutch 6 is provided between the intermediate shaft 3 and the motion converting member 5 . A clutch sleeve 25 which is coupled to the intermediate shaft 3 by way of a rotation transmitting member, and a second clutch 27 which rotates integrally with the tool holding sleeve 11 and can move in a longitudinal direction of the tool holding sleeve are arranged on an outer periphery of the tool holding sleeve 11 . The second clutch 27 is provided so as to be engaged with and disengaged from the clutch sleeve 25.

1 . A hammer drill comprising:
 an intermediate shaft coupled to a motor;   a tool holding sleeve arranged in parallel with the intermediate shaft and configured to hold a tip end tool;   a motion converting member provided on the intermediate shaft so as to rotate and configured to convert a rotary motion to a reciprocating motion;   a first clutch provided between the intermediate shaft and the motion converting member;   a clutch sleeve disposed on an outer periphery of the tool holding sleeve and coupled to the intermediate shaft by way of a rotation transmitting member; and   a second clutch disposed on the outer periphery of the tool holding sleeve so as to rotate integrally with the tool holding sleeve and so as to move in a longitudinal direction of the tool holding sleeve and configured to be engaged with and disengaged from the clutch sleeve.   
   
   
       2 . The hammer drill according to  claim 1 , wherein the motion converting member converts the rotary motion of the intermediate shaft to the reciprocating motion to operate the tip end tool to hammer. 
   
   
       3 . The hammer drill according to  claim 1 , further comprising:
 a lock member capable of being engaged with the second clutch which has been disengaged from the clutch sleeve,   wherein the lock member is urged in a direction so as to be engaged with the second clutch.   
   
   
       4 . The hammer drill according to  claim 1 , wherein a gear is formed at a front end of the intermediate shaft,
 the rotation transmitting member is always meshed with the gear at the front end of the intermediate shaft, and   the rotation transmitting member is provided on an outer periphery of the clutch sleeve so as to rotate, and urged in a direction so as to be meshed with the clutch sleeve.