A New or Improved Differential Steering Gear for Motor Vehicles.

摘要

125,794. Blackstone, G. M., Carter, F., Carter, E., and Watts, R. E. May 14, 1918. Compulsory differential driving, and differential braking.-In endless-track and other motorvehicles in which the steering is effected by differential driving, the differential gear is interconnected with irreversible worm.gearing by means of which it is normally locked, the worms being operated by gearing carried on brake drums to effect the steering movement. The planet pinions d of the differential gear are integral with worm-wheels e meshing with worms f on shafts f1 which are fitted with spur-gears g1. The spur-gears g1 mesh with a gear g loosely mounted on an extension of the differential casing c and attached to a brake drum h. The drum h is provided with a bevelgear i meshing with bevel-pinions j carried by the casing c and meshing with a bevel-gear on a second drum h1. On braking one of the drums h, h1, the worms are rotated through the spurgears g, g', thus rotating the planet pinions and driving one side of the divided shaft a faster than the other. In a modification, spur differentialgearing is used, the planet pinions being provided with worm-wheel extensions engaging radial worms which are fitted with bevel-gears engaging bevel-gears on a pair of brake-drums.