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1. (WO2018084784) A DUST REMOVAL ARRANGEMENT FOR AN ENGINE-DRIVEN TOOL

Pub. No.:    WO/2018/084784    International Application No.:    PCT/SE2017/051075
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Thu Nov 02 00:59:59 CET 2017
IPC: B23D 59/00
B23D 47/00
B23Q 11/02
B28D 1/04
B28D 7/02
Applicants: HUSQVARNA AB
Inventors: KARLSSON, Fredrik
Title: A DUST REMOVAL ARRANGEMENT FOR AN ENGINE-DRIVEN TOOL
Abstract:
The present disclosure relates to engine-driven tool(1) comprising a rotatable work tool (2) and an engine (4) for propelling a first driving pulley (28) via a clutch wheel (30) comprised in a power transferring unit (27) and having an outer edge. The first driving pulley (28) and the clutch wheel (30) are arranged to rotate around a common driving axis (38). The power transferring unit (27) comprises an endless drive belt (9) that is arranged propel the rotatable work tool(2) when the first driving pulley (28) is propelled. A fan arrangement (13) is arranged to convey air from a dust channel (11) formed between a shielding cover (8) and the rotatable work tool (2), and comprises a fan turbine (26) that is connected to a fan pulley (29)connected to the drive belt (9) is arranged to propel the fan pulley (29). A first overlap line (50) extends along the outer edge (52) of the clutch wheel (30), perpendicular to the extension of the common driving axis (38), the first overlap line (50) further extending via the fan turbine (26).