Auxiliary device of friction clutch

An auxiliary device of a friction clutch is characterized in that a working cylinder is in a disc shape, an input shaft is fixedly connected with the cylinder, an output shaft is installed in a through hole of a shell through a bearing, magnetorheological fluid is arranged in a cavity of the cylinder, the viscosity coefficient of magnetorheological fluid is influenced by the magnitude of current of a coil, and therefore the magnitude of loads loaded on a driven disc of the clutch is influenced, and the aim of making connection of the clutch smoother is achieved. A magnet exciting coil is fixed to an outer magnetic core which surrounds the outer side of the cylinder, and therefore the magnetic field distribution can be improved, and the auxiliary device works more stably; if the magnet exciting coil is damaged, the magnet exciting coil can be easily replaced, and therefore use performance of the auxiliary device is improved. Due to the fact that the controllability of magnetorheological fluid is high, the auxiliary device rapidly responds to the clutch. After the friction clutch is fully connected, a slide block overcomes the tensile force of a reset spring and is inserted into a machined groove in the cylinder, the output shaft is in rigid connection with the cylinder, the electromagnetic coil can be powered off at the moment, the rigid connection of a transmission system is kept, the auxiliary device does not need to be powered for a long time through the electromagnetic coil, and the high transmission efficiency and high stability of the transmission system are ensured.