COUPLING DEVICE AND PARKING STRUCTURE FOR DUAL POWER SOURCE DRIVING SPEED REDUCER

A differential lock and a parking structure for a dual power source driven reducer is disclosed. The structure comprises a first shaft (6), a second shaft (7), a differential lock mechanism and a parking mechanism. The first shaft (6) and the second shaft (7) are directly or indirectly connected with two power sources respectively, and the differential lock mechanism and the parking mechanism are disposed at ends of the first shaft (6) and the second shaft (7). The differential lock mechanism comprises a movable fluted disc assembly (3), a fixed fluted disc assembly (4) and a fixed armature assembly (8). The parking mechanism comprises a parking gear integrated with a fixed fluted disc (41), a pawl assembly (1) and a parking cam assembly (2). The parking cam assembly (2) drives the pawl assembly (1) to switch between a parking-in position and a parking-out position. The structure locks the relative rotation between the two power sources through the differential lock mechanism, couples the power of the two power sources, realizes the power transmission according to demand, improves the maximum torque of the single output, and thus improves the ability of the vehicle to get unstuck when it is stuck in a swamp, mud pit, etc.