An all-terrain vehicle and a transmission mechanism thereof are provided. The transmission mechanism includes an independent suspension axle, and the axle includes a left half-axle and a right half-axle. A mechanical locking spiral differential device is further provided at a joint of the left half-axle and the right half-axle, which makes the left half-axle and the right half-axle to be in a differential state when the vehicle runs normally, and to be in a differential locked state automatically when the vehicle slips on one side. The differential device allows the wheels to perform unequal distance running by pure rolling as much as possible and prevent the vehicle from side tipping and side slipping and tire scuffing, and also allows the torque on one side to be transferred to the torque on another side to enable the all-terrain vehicle to get rid of a stuck condition.

A electric locker differential assembly includes a first and second side gear. A pinion gear set is disposed between the first side gear and the second side gears. An engagement shaft includes flyweights disposed on the engagement shaft which are moveable between retracted and extended positions to lock and unlock the differential assembly. A lockout shaft includes a pawl disposed thereon. An electrical adjustment mechanism includes an actuator operably connected with an adjustment nut or rod. An electrical adjustment biasing spring includes a first leg retained by the adjustment nut and a second leg connected with the pawl wherein movement of the adjustment nut by the actuator varies a biasing force applied to the pawl.

A electric locker differential assembly includes a first and second side gear. A pinion gear set is disposed between the first side gear and the second side gears. An engagement shaft includes flyweights disposed on the engagement shaft which are moveable between retracted and extended positions to lock and unlock the differential assembly. A lockout shaft includes a pawl disposed thereon. An electrical adjustment mechanism includes an actuator operably connected with an adjustment nut or rod. An electrical adjustment biasing spring includes a first leg retained by the adjustment nut and a second leg connected with the pawl wherein movement of the adjustment nut by the actuator varies a biasing force applied to the pawl.

A differential including a case (5), a side gear (100,200), a first lock plate (1000) having a first side and a toothed side, and a second lock plate (2000) having a first side facing the case and a toothed second side facing the toothed side of the first lock plate (1000). The differential further includes a cam plate (300) between the side gear (100,200) and the first lock plate (1000) and a clutch pack (40) between the cam plate (300) and the first lock plate (1000). The cam plate (300) includes a splined neck (330) extending towards the first lock plate (1000), and the clutch pack (40) includes at least one active clutch disc (20) internally splined to the splined neck (330).

A differential comprises a case and a side gear. The differential further comprises a lockout mechanism having a first lock plate comprising a first side and a toothed side; a second lock plate comprising a first side facing the case and a toothed second side facing the toothed side of the first lock plate; a cam plate axially between the side gear and the first lock plate; and a clutch pack axially between the cam plate and the first lock plate. The differential further comprises an engagement mechanism configured to actuate the cam plate to rotate.

A differential for a vehicle. The differential includes a cage, which is rotatable about a first axis of rotation and has a drive interface, a first driven gear, mounted in the cage to be rotatable about the first axis of rotation, a second driven gear, mounted in the cage to be rotatable about the first axis of rotation, a compensating gear, which is mounted in the cage about a second axis of rotation extending perpendicularly to the first axis of rotation and meshes with the first and the second driven gear, a flywheel mass, coupled to the cage and locked against rotation with respect to the first axis of rotation and displaceable in a radial direction perpendicularly to the first axis of rotation, and a clutch, which, as a result of an outward movement of the flywheel mass in the radial direction, is movable into a locking state.

A differential for a vehicle. The differential includes a cage, which is rotatable about a first axis of rotation and has a drive interface, a first driven gear, mounted in the cage to be rotatable about the first axis of rotation, a second driven gear, mounted in the cage to be rotatable about the first axis of rotation, a compensating gear, which is mounted in the cage about a second axis of rotation extending perpendicularly to the first axis of rotation and meshes with the first and the second driven gear, a flywheel mass, coupled to the cage and locked against rotation with respect to the first axis of rotation and displaceable in a radial direction perpendicularly to the first axis of rotation, and a clutch, which, as a result of an outward movement of the flywheel mass in the radial direction, is movable into a locking state.