Describe the working of recirculating ball type steering gear box with sketch.
1 Answer
Answer :
Working of Recirculating ball type steering gear box: It consists of worm at the end of steering rod. A nut is mounted on the worm with two sets of balls in the grooves of the worm, in between the nut and worm. The balls reduce the friction during the movement of nut on the worm. the nut has large number of teeth on the outside, which mesh with the teeth on a worm wheel sector, on which is further mounted the drop arm, which steers the road wheels through the link rod and steering arm. When the steering wheel is turned, the balls in the worm roll in the grooves and cause the nut to travel along the length of the worm. The balls , which are in Two sets are recirculated through the guides as shown in the fig. the movement of the nut causes the wheel sector to turn at an angle and actual the link rod through the drop arm, resulting in the desired steering of the wheels.