What is worm and sector steering gear?
Worm and Sector Steering Operation: When you turn the steering wheel, the steering shaft turns the worm gear. The sector gear rotates around its axis as its teeth move along the worm gear and moves the P itman arm. In worm and sector design, the bearings support the worm at both ends.
Which vehicles use worm and nut type steering?
Recirculating ball, also known as recirculating ball and nut or worm and sector, is a steering mechanism commonly found in older automobiles, off-road vehicles, and some trucks.
What is a worm style steering box?
The worm and sector steering box was one of the first steering box designs. It comprises a steering wheel shaft with a “worm” screw on the end, and a section gear that is moved up and down as the steering wheel turns.
What is worm and worm gear?
Worms and worm gears are gear sets that offer high gear reduction and torque multiplication with a small footprint. A worm drive is a cylindrical gear with a shallow spiral thread that engages the worm gear in a non-intersecting, perpendicular axes configuration.
What is a sector gear?
A Sector gear is a gear that has teeth cut along a section of its circumference only. The remaining portion of the gear is smooth without any teeth (Fig. 1.14). This arrangement may save space, material, and manufacturing costs. Sector gears are used in applications when less than 360° of rotation is required.
What is the worm and wheel used in?
Automotive Steering Systems. In an automotive steering system, the worm gear connects to the steering wheel through the steering column. The turning of the steering wheel depends on the precise angle of the gear ratio of the worm gear system.
What is a worm and wheel?
A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm wheel (which is similar in appearance to a spur gear). The two elements are also called the worm screw and worm gear.
How many types of steering are there?
There are two types of steerings depending upon the leverage provided between the road wheel and the steering wheel and also the number of shocks and vibrations transmitted from the road wheels to the steering wheels, namely, Reversible steering. Irreversible steering.
Where is worm and wheel used?
One of the steering systems of a car has a worm screw as its basic component. In these systems, the worm screw constantly engages with a spur gear. The screw connects to the steering wheel through a “steering column”, and the wheel does so to the steering arm.
Where are worm and worm wheels used?
Worm drives are used as the tuning mechanism for many musical instruments, including guitars, double basses, mandolins, bouzoukis, and many banjos (although most high-end banjos use planetary gears or friction pegs). A worm drive tuning device is called a machine head.
What is a steering sector shaft?
The sector shaft is a critical component of an automotive power assisted recirculating ball steering gear and one that is vulnerable to fracture due to loads transmitted through the steering linkage under certain conditions.
What is function of worm and worm wheel?
In order to transmit motion and power at various speeds and speed ratios, worms and worm gears work in sets, rotating on shafts at right angles to one another. The worm usually drives the worm gear. In worms and worm gear sets, both the worm and worm gear are of the same hand.
When should I use worm gear?
The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as speed reducers in low- to medium-speed applications.
What is worm and sector steering?
Manufacturers employed worm and sector steering on earlier generation cars. This mechanism transmits the motion from the steering gear tube to the Pitman arm. It was deri ved from the earliest design of the steering gear – the worm and wheel. This steering gear consists of case-hardened steel worm and sector; both supported by bearings.
How does a worm gear work on a steering wheel?
Turning the steering wheel left or right turns the steering shaft to which a worm gear is attached within the gear box. The steering worm gear moves the sector gear, and this motion is transmitted to the pitman arm which moves fore and aft.
What is a sector gear on a steering wheel?
In this type of steering mechanism, the steering shaft has a worm gear attached to it at its end. It meshes directly with a sector gear. It is called ‘sector’ gear because it’s only a section of the full gear. When you turn the steering wheel, the steering shaft turns the worm gear.
What is worm and ball bearing nut steering gear?
In the worm and ball bearing nut steering gear, a ball nut is mounted on the worm of the steering shaft. The worm and the nut have mating spiral grooves in which steel balls circulate to provide a frictionless drive between the worm and nut. Two sets of balls are used, with each set operating independently of others.