EP 1677950 A1 20060712 - PERCUSSION DEVICE FOR A HAND MACHINE TOOL
Title (en)
PERCUSSION DEVICE FOR A HAND MACHINE TOOL
Title (de)
SCHLAGWERK FÜR EINE HANDWERKZEUGMASCHINE
Title (fr)
OUTIL DE PERCUSSION POUR UNE MACHINE-OUTIL A MAIN
Publication
Application
Priority
- DE 2004001957 W 20040903
- DE 10348397 A 20031017
Abstract (en)
[origin: WO2005044521A1] The invention relates to a percussion device for a hand machine tool, in particular, a hammer drill, a paving breaker or an impact driller, comprising a drive piston (11), arranged for axial displacement in a guide tube, driven by motor in a reciprocating back and forth axial motion, by means of a gear (17) and a striker, acting on a tool, housed such as to be displaced axially in the guide tube and defining a compression chamber with an enclosed air cushion, along with the drive piston (11). According to the invention, a free configuration of the time course for the reciprocating motion of the drive piston (11), for the purposes of optimisation, for example, reduction of the peak pressure in the compression chamber, may be achieved, whereby the gear (17) comprises two engaging non-circular gearwheels (18, 19), the rotation axes (20, 21) of which are arranged at a fixed separation (a) from each other. The one driving non-circular gearwheel (18) is driven by motor and a connecting rod (23), connected to the drive piston (11), is connected, eccentrically to the rotation axis (21) of the non-circular gearwheel (19) as driven by the non-circular gearwheel (18).
IPC 1-7
IPC 8 full level
B25D 11/10 (2006.01); B25D 11/12 (2006.01)
CPC (source: EP US)
B25D 11/10 (2013.01 - EP US); B25D 11/125 (2013.01 - EP US)
Citation (search report)
See references of WO 2005044521A1
Designated contracting state (EPC)
DE ES IT
DOCDB simple family (publication)
DE 10348397 A1 20050519; CN 1867429 A 20061122; DE 502004003181 D1 20070419; EP 1677950 A1 20060712; EP 1677950 B1 20070307; ES 2281819 T3 20071001; US 2006260830 A1 20061123; WO 2005044521 A1 20050519
DOCDB simple family (application)
DE 10348397 A 20031017; CN 200480030186 A 20040903; DE 2004001957 W 20040903; DE 502004003181 T 20040903; EP 04762744 A 20040903; ES 04762744 T 20040903; US 54798304 A 20040903