公开(公告)号：US4766963A

公开(公告)日：1988-08-30

申请号：US39801

申请日：1987-04-15

Applicant: Carl S. M. Hartwig ,  Karl G. B. Ragnmark

Inventor： Carl S. M. Hartwig ,  Karl G. B. Ragnmark

IPC: B25D11/12 ,  B23B45/16 ,  B25D11/00 ,  B25D16/00 ,  E21B1/38 ,  B23B45/02

CPC classification number: B25D11/00 ,  E21C3/04

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 the two pistons. The drive shaft for the hammer mechanism (14) is also the rotor shaft of the electromotor (17) so 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 of and surround the corresponding parts (21, 22) of the electromotor stator (19) thus enabling the rotor also to be a flywheel and a fanwheel.

Abstract translation: 一种具有转子式电机（17）和布置在机壳（13）中的锤机构14的手持式电动锤式工具。 锤击机构（14）包括具有偏心曲柄销（35）的驱动轴（24），用于连接到可在气缸（42）中往复运动的驱动活塞（40）上的活塞杆（43），用于驱动锤式活塞 （41）经由两个活塞之间的气垫（44）朝着工作工具（16）移动。 锤子机构（14）的驱动轴也是电动机（17）的转子轴，从而锤子机构和电动机以相同的速度驱动。 转子（18）的电磁活动部分（23,49）位于电动机定子（19）的相应部分（21,22）的外面并且围绕电动机定子（19）的相应部分（21,22），从而使得转子也可以是飞轮和风轮。