Liftable rear suspension system of amphibious vehicle

A liftable rear suspension system of an amphibious vehicle, comprising a differential gear (2) and a brake disc (4), the differential gear (2) being installed inside a vehicle body frame (1), and the brake disc (4) being installed on an inner side of a hub of a vehicle wheel (3), wherein a brake (5) is arranged on an outer edge of the brake disc (4), a flange plate (6) is fixed on an inner side of the brake disc (4), a universal joint arm (7) is rotatably installed on a periphery of one end, close to the vehicle body frame (1), of the flange plate (6) through a bearing, the flange plate (6) is connected to an output shaft (8) of the differential gear (2) through a cage universal joint (9), a worm gear (10) is rotatably installed on a periphery of one end, stretching out of the vehicle body frame (1), of the output shaft (8) through a bearing, a pair of bearing seats (12) are installed on the vehicle body frame (1) through an installation rack (11), a worm (13) is rotatably connected between the pair of bearing seats (12), the worm (13) is in meshed connection with the worm gear (10), a motor (14) for driving the worm (13) to rotate is installed outside the bearing seat (12);

• a first double wishbone (15) and a second double wishbone (16) are respectively hinged between the universal joint arm (7) and the worm gear (10), and a shock absorber (17) is hinged between a surface of the first double wishbone (15) and the worm gear (10).