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1. (WO2018104075) TORQUE IMPULSE WRENCH

Pub. No.:    WO/2018/104075    International Application No.:    PCT/EP2017/080335
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Sat Nov 25 00:59:59 CET 2017
IPC: B25B 21/02
Applicants: ATLAS COPCO INDUSTRIAL TECHNIQUE AB
Inventors: MALINOWSKI, Wojtek
SJÖBLOM, Torbjörn Rafael
Title: TORQUE IMPULSE WRENCH
Abstract:
An impulse wrench comprises a housing (10), an electric motor (16) with a rotor (21), a hydraulic pulse unit (18) with an inertia drive member (26) and an output shaft (27), and a coupling (28) rigidly connecting the motor rotor (21) to the inertia drive member (26) to form an integrated rotating structure, wherein the coupling (28) comprises a male coupling portion (32) on the inertia drive member (26) and a female coupling portion (24) on the motor rotor (21). The male coupling portion (32) is arranged to be received in said female coupling portion (24) to form the coupling (28) and has an external threaded section (25a) for cooperation with an internal threaded section (25b) on the female coupling portion (24). The male coupling portion (32) and the female coupling portion (24) have mating conical surfaces (36, 37) to be axially clamping together by the threaded sections (25a, 25b) on the male and female coupling portions (32, 24) to stabilize and lock the coupling (28).