Steering Racks

Motorcycle Steering & Transmission System

Steering racks

Rack-and-pinion steering  is quickly becoming the most common type of steering on cars, small trucks and SUVs. It is actually a pretty simple mechanism. A rack-and-pinion gearset is enclosed in a metal tube, with each end of the rack protruding from the tube. A rod, called a tie rod , connects to each end of the rack.

The pinion gear is attached to the steering shaft . When you turn the steering wheel, the gear spins, moving the rack. The tie rod at each end of the rack connects to the steering arm  on the  spindle.

The rack-and-pinion gear set does two   things:

  • It converts the rotational motion of the steering wheel into the linear motion needed to turn the wheels.
  • It provides a gear reduction, making it easier to turn the wheels.

On most cars, it takes three to four complete revolutions of the steering wheel to make the wheels turn from lock to lock (from far left to far right).

The    steering ratio    is the ratio of how far you turn the steering wheel to how far the wheels turn. For instance, if one complete revolution (360 degrees) of the steering wheel results in the wheels of the car turning 20 degrees, then the steering ratio is 360 divided by 20, or 18: 1. A higher ratio means that you have to turn the steering wheel more to get the wheels to turn a given distance. However, less effort is required because of the higher  gear ratio .

Generally, lighter, sportier cars have lower steering ratios than larger cars and trucks. The lower ratio gives the steering a quicker response-you don't have to turn the steering wheel as much to get the wheels to turn a given distance- which is a desirable trait in sports cars. These smaller cars are light enough that even with the lower ratio, the effort required to turn the steering wheel is not excessive.

Some cars have  variable-ratio steering  , which uses a rack-and-pinion gear set that has a different tooth pitch (number of teeth per inch) in the center than it has on the outside. This makes the car respond quickly when starting a turn (the rack is near the center), and also reduces effort near the wheel's turning limits.

Power Rack-and-pinion

When the rack-and-pinion is in a power-steering system, the rack has a slightly different design.





Motorcycle Steering and Transmission System
Motorcycle Steering and Transmission System

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Contact Information

CONTACT US

Ningbo Jinyao Machinery Company. LTD

Contact Person: Alex Micheal

Phone:+86-1586-7464794

Fax:+86-0574-8614-5126

Address: no.226 Tianshan Road Beilun District ,Ningbo,Zhejiang

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