Double Worm Differential

The double worm differential is a newly invented product in China in 2014. It is characterized by two intermeshing worms installed in the rotor obliquely, and the two worm shaft ends are respectively connected with the output shafts on both sides. The joints are connected, the ring gear is installed on the rotor, the whole is fixed to the housing by the bearing, the power source is input by the ring gear, and the output shafts on both sides output power.

The two worms use a small lead angle. The size of the lead angle determines the degree of self-locking. In the worm and turbine transmission, the worm is active, the turbine is driven, and the two worms are engaged, which is equivalent to each other's turbines. , When the lead angle is small to a certain extent, the two worms will be interlocked, and they can only be rotated when torque is applied on both sides at the same time, so this is the reason for self-locking without affecting differential driving.

If it is used in the center differential, the pitch circle diameter of the two worms can be adjusted, so that the front and rear output torques can be different, just like the Torsen differential.

The advantages are small size, simple processing, low cost, and a full-time four-wheel drive solution.