Clutch device for air conditioner of automobile

The utility model relates to a clutch device for the air conditioner of an automobile, and a coil holder and a driving disc are arranged in the device and a driving pressure disc is arranged on the device which is provided with an internal gear which is engaged with an external gear on one end of a bearing block; the driving pressure disc and the bearing block are combined by a back-action spring, a spring sleeve and an internal hexagon screw bolt, and when the clutch rapidly rotates and the coil holder and the driving disc are electrified to generate magnetic force, the internal gear of the driving pressure disc tightly resists downwards the driving disc along the external gear of the bearing block to drive a compressor to rotate. When the coil holder and the driving disc has no magnetic force, the upward spring back of the back-action spring, the spring sleeve and the internal hexagon screw bolt makes the internal gear of the driving pressure disc upwards resist the bearing block along the external gear of the bearing block, and the clutch above the driving pressure disc can generate run idle.