The rack and pinion is known for its long stroke. As long as the rack can be made long enough, the rack and pinion drive system has almost no limit on the stroke length. Instead, the stroke length is limited by its supporting structure. By using racks instead of belts, elasticity is eliminated and rigidity is increased. The article will briefly introduce the related knowledge of rack and pinion steering gear.
The commonly used steering system is a rack and pinion, and most 80% of commercial vehicles use this type. This is the simplest one, with fewer parts and easy to design. The rack and pinion is a linear actuator consisting of a pair of gears that convert rotary motion into linear motion.
A rack and pinion steering gear refers to a circular gear called a "pinion" that meshes with teeth on a linear "pinion" rod called a "rack"; the rotational movement applied to the pinion makes the rack relative to the pinion Move, so as to convert the rotary motion of the pinion into linear motion.
The rack and pinion steering system consists of a pinion (circular gear) and a rack (linear gear). The rack and pinion steering system works by converting rotary motion into linear motion. Most cars, small trucks, and SUVs are equipped with rack-and-pinion steering systems instead of the recirculating ball steering systems found in large trucks, large SUVs, and other heavy vehicles.
In this type of steering gearbox, the pinion gear is installed at the end of the steering shaft. The pinion gear meshes with the rack, and both ends of the rack are provided with ball joints to allow the wheels to rise and fall. The rotational movement of the steering wheel is transmitted to the pinion gear. The circular motion of the pinion is transformed into a linear rack motion, which is further transmitted to the tie rod and the short shaft through the ball joint.
Although the rack and pinion system may seem complicated, it is just a gear connected to the rack. The rod is connected to a set of tie rods. The generated rack is used to design the rack profile of generating tools (such as hobs or gear shapers) to indicate the details and dimensions of the teeth. Simple linear actuators usually consist of some combination of rack and pinion. The shaft rotation of the pinion is driven manually or by a motor to produce linear motion.
Rack and pinion steering uses a gear set to convert the circular motion of the steering wheel into the linear motion required to turn the wheels. It also provides gear reduction, so turning the wheels is easier. The working principle of the rack and pinion steering gear is to enclose the rack and pinion group in a metal tube, and each end of the rack extends from the tube and is connected to a shaft. The transmission is connected to the steering shaft, so when the steering wheel is turned, the gears will rotate, thereby moving the frame. The axial rods at both ends of the rack are connected to the end of the tie rod, and the end of the tie rod is connected to the main shaft.
A smaller pinion gear will provide lighter steering, but you need to turn the steering wheel several times to get from locked to locked. A larger pinion gear means fewer turns of the steering column, but heavier steering.
The working principle of rack and pinion steering is to use a gear system to convert the circular motion of the steering wheel into the linear motion required to turn the wheels. The metal tube houses the gear set. There are openings at each end of the tube so that the rack can be connected to the axial rod. The pinion gear is connected to the steering shaft, so when the steering wheel turns, the gear rotates and moves the rack. The axial rod is connected to the end of the tie rod, and the end of the tie rod is connected to the main shaft.
