Patent ID: 6479783
Filing Date: 2002-11-12
Classification: B23K,H02K

Abstract:
An electric motor device for powering a spot welding clamp having articulated arms which have welding electrodes, said electric motor comprising a casing, a rotor coupled to a rotating shaft which has two ends and is connected to said clamp, in order to control the welding electrodes carried by said articulated arms, to open the welding electrodes, to close the welding electrodes and to clamp the welding electrodes onto a part by a converting system extending through the motor, this system converting the rotating motion of said shaft into translating motion of a mechanism operating the clamp, said electric motor being linked to a slaving device coupled to the rotor of the motor, wherein the slaving device is arranged at one of said ends of the motor shaft and the shaft is fitted with a gear wheel which can be operated from the outside, for rotating it manually through at least one circular opening of the casing, this opening being offset with respect to the motor shaft, wherein the gear wheel can be rotated by a key, said key having a set of teeth which can engage with said gear wheel.