Patent ID: 9623587
Date: 2017-04-18
CPC Classifications: B23D,B28D,F16D

Claim:
1. A wall saw comprising: a carriage to be mounted to a guide rail so as to be moveable along the guide rail; a saw arm pivotally mounted to the carriage; a rotatable spindle configured for connection to a saw blade, the spindle being rotatably mounted to the saw arm; an electric drive motor, which is mounted to the carriage and which is provided with a stator, a rotor and an output shaft; and a transmission mechanism for transmitting torque from the output shaft of the drive motor to the spindle, the spindle being rotatable under the effect of the drive motor via the output shaft and the transmission mechanism, wherein the rotor of the drive motor comprises a rotor hub which is operatively connected to the output shaft of the drive motor through a safety clutch so as to allow torque to be transmitted from the rotor hub to the output shaft via the safety clutch, the safety clutch being configured to allow mutual rotation between the rotor hub and the output shaft when the torque reaches a given threshold value; and wherein the safety clutch is accommodated in a space inside the rotor hub.