EP 3753676 A1 20201223 - HANDHELD POWER TOOL
Title (en)
HANDHELD POWER TOOL
Title (de)
HANDWERKZEUGMASCHINE
Title (fr)
OUTIL ÉLECTRIQUE PORTATIF
Publication
Application
Priority
- CN 201810151572 A 20180214
- CN 201810151559 A 20180214
- CN 2019075127 W 20190214
Abstract (en)
The present invention relates to a hammer striking mechanism and a handheld power tool including the hammer striking mechanism. The hammer striking mechanism includes a hammer and a guide member that are relatively rotatable and an energy storage mechanism abutting the hammer. One of the hammer and the guide member is provided with a curve guide, and the other of the hammer and the guide member is correspondingly provided with an conversion member. The curve guide includes a plurality of slope ascending portions and descending portions corresponding to the slope ascending portions. When the conversion member moves past the slope ascending portion, the conversion member drives the hammer to overcome an applied force of the energy storage mechanism to move in a first direction. When the conversion member moves past the descending portion, the energy storage mechanism drives the hammer to move to produce a striking in a second direction opposite to the first direction. The relative rotational speed of the rotation of the hammer relative to the guide member is 1000 revolutions per minute to 2500 revolutions per minute, and a ratio of the striking frequency of the hammer to the relative rotational speed is 2 times per revolution to 4 times per revolution.
IPC 8 full level
B25B 21/00 (2006.01)
CPC (source: CN EP)
B25B 21/023 (2013.01 - EP); B25D 11/104 (2013.01 - EP); B25D 16/00 (2013.01 - EP); B25F 3/00 (2013.01 - CN EP); B25F 5/00 (2013.01 - CN); B25F 5/001 (2013.01 - CN EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3753676 A1 20201223; EP 3753676 A4 20211103; CN 110153965 A 20190823; CN 209774563 U 20191213; WO 2019158114 A1 20190822
DOCDB simple family (application)
EP 19754854 A 20190214; CN 2019075127 W 20190214; CN 201910123005 A 20190214; CN 201920198757 U 20190214