Transmission device for a vehicle axle

A transmission device for a vehicle axle having an axle axis (A), the device comprising:

• a first driving gear (11) intended to be driven by a first drive member (M1),
• a second driving gear (12) intended to be driven by a second drive member (M2),
• a left wheel shaft (31), intended to be coupled to a left axle wheel (W1),
• a right wheel shaft (32), intended to be coupled to a right axle wheel (W2),
• at least two planet gears (21, 22),
• a second left coupling member (51) capable of selectively engaging the left wheel shaft (31) to rotate with the first driving gear (11), directly or via a reducer,
• a second right coupling member (52) capable of selectively engaging the right wheel shaft (32) to rotate with the second driving gear (12), directly or via a reducer, the device being configured so that it comprises:
• a main axle shaft (10), rotatably mounted about the axle axis (A) and interposed between the left and right wheel shafts (31, 32),
• a first left coupling member (41) capable of selectively engaging the left wheel shaft (31) to rotate with the main axle shaft (10), directly or via a reducer,
• a first right coupling member (42) capable of selectively engaging the right wheel shaft (32) to rotate with the main axle shaft (10), directly or via a reducer,
• and wherein the main axle shaft (10) acts as a planet carrier for the at least two planet gears (21, 22), each of the at least two planet gears (21, 22) providing permanent toothed engagement with the first driving gear (11) and the second driving gear (12).