Novel pneumatic normally-closed clutch

The utility model belongs to the technical field of transmission equipment, and particularly relates to a novel pneumatic normally-closed clutch which comprises a shell, a transmission mechanism used for transmission, a clutch mechanism used for being connected with the transmission mechanism, a control mechanism used for controlling the clutch mechanism and an oil seal mechanism. The fixing disc is fixedly connected with the connecting disc through bolts, the control mechanism is fixedly connected to the side, close to the fixing disc, of the connecting disc through bolts, the control mechanism is in sliding fit with a transmission shaft of the clutch mechanism, the transmission mechanism comprises an output connecting shaft and an input connecting shaft, and the oil seal mechanism is fixedly connected to the connecting disc through bolts. The clutch mechanism is matched with the control mechanism, so that the power system can be separated from the air winch in time through simple tools such as an inflator a