EP 0930957 A1 19990728 - ELECTRIC MACHINE TOOL
Title (en)
ELECTRIC MACHINE TOOL
Title (de)
ELEKTROWERKZEUGMASCHINE
Title (fr)
MACHINE-OUTIL ELECTRIQUE
Publication
Application
Priority
- DE 9801247 W 19980506
- DE 19726383 A 19970621
Abstract (en)
[origin: DE19726383A1] The invention relates to an electrical machine tool for rotational and/or percussive tools such as drilling machines or hammer drills, comprising a machine housing (10) with an electrically driven working spindle (11) to drive a tool fitting (12) and a mechanical percussive element (16) which has a beater (18) that is accelerated in its axial direction, directly or indirectly beating the shaft of the tool and a drive unit (20) which causes the beater (18) to accelerate on the basis of a rotational movement. Said drive unit (20) comprises an axially displaceable sensing element synchronously operating with the working spindle (11) in order to achieve higher working spindle (11) speeds without using a countershaft. Said sensing element (21) is guided between two ring-shaped curved paths (22, 23) arranged in a rotationally fixed manner in relation to the working spindle (11) with axial clearance.
IPC 1-7
IPC 8 full level
B23B 45/16 (2006.01); B25D 16/00 (2006.01)
CPC (source: EP US)
B25D 16/00 (2013.01 - EP US); B25D 2211/064 (2013.01 - EP US)
Citation (search report)
See references of WO 9858774A1
Designated contracting state (EPC)
CH DE GB IT LI
DOCDB simple family (publication)
DE 19726383 A1 19981224; BR 9806112 A 19990831; CN 1072549 C 20011010; CN 1229377 A 19990922; DE 59803839 D1 20020523; EP 0930957 A1 19990728; EP 0930957 B1 20020417; JP 2001500070 A 20010109; US 6199640 B1 20010313; WO 9858774 A1 19981230
DOCDB simple family (application)
DE 19726383 A 19970621; BR 9806112 A 19980506; CN 98800811 A 19980506; DE 59803839 T 19980506; DE 9801247 W 19980506; EP 98933451 A 19980506; JP 50352499 A 19980506; US 24259999 A 19990506