Hand-held hammer tool

Details Hand-held hammer tool Hand-held hammer tool

B - Operations, Transporting

23

B

77/17

B23B 45/00 (2006.01) B25D 11/00 (2006.01) E21B 1/38 (2006.01)

Patent

CA 1202203

Abstract: A hand-held electrically powered hammer tool with a rotor-type electromotor (17) and a hammer mechanism (14) arranged in a machine housing (13). The hammer mechanism (14) includes a drive shaft (24) with an excentric crank pin (35) thereon for a piston rod (43) connected to a drive piston (40) reciprocably movable in a cylinder (42) for driving a hammer piston (41) towards a working tool (16) via an air cushion (44) between said pistons. The drive shaft for the hammer mechanism (14) is also the rotor shaft of the electromotor (17) which means that the hammer mechanism and the motor are driven by the same speed. The electromagnetically active parts (23,49) of the rotor (18) are located outside surrounding the corresponding parts (21, 22) of the electromotor stator (19) thus enabling the rotor also to be a flywheel and a fanwheel.

437178

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