Main drive outer sealing device capable of being rapidly and integrally disassembled and assembled

The utility model discloses a main drive external sealing device capable of being assembled and disassembled quickly and integrally, which comprises a main support and a sealing disc, a pulling and ejecting mechanism capable of driving the sealing disc to move is arranged on the main support, a locking and clamping mechanism capable of fixing the sealing disc is arranged on the main support, and the pulling and ejecting mechanism comprises an auxiliary support. The auxiliary support is vertically installed in the main support in a sliding mode, and a first micro spring is fixedly installed between the auxiliary support and the main support. The two inner sliding rods move to assist the two side sliding plates in approaching, when the auxiliary support bears external pressure, the two pressing plates are driven to continue to move downwards, the ends of the two pressing plates move downwards into the inserting grooves, the pressing plates continue to move downwards to compress and deform the second miniature s