It is actually a pretty simple mechanism.
Rack and pinion gear diagram.
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The rack and pinion is a very important part that controls how your steering wheel works and how your tires turn.
Helical gearing gives smoother and quieter operation for the driver.
The rack carries the full load of the actuator directly and so the driving pinion is usually small so that the gear ratio reduces the torque required.
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Both the pinion and the rack teeth are helical gears.
This pinion runs in mesh with a rack that is connected to the steering tie rods.
Generally gear rack and pinion are collectively called rack and pinion.
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The pinion gear is attached to the steering shaft.
A rack and pinion gearset is enclosed in a metal tube with each end of the rack protruding from the tube.
This force thus torque may still be substantial and so it is common.
A rod called a tie rod connects to each end of the rack.
A gear rack has straight teeth cut into one surface of a square or round section of rod and operates with a pinion which is a small cylindrical gear meshing with the gear rack.
Gear racks are utilized to convert rotating movement into linear motion.
The rack and pinion steering box has a pinion connected to the steering column.