1. Types of Steering gear mechanism
Kutumov Evgeny

2. Steering system gear mechanisms
There are two types of steering gear mechanism: 
Fifth wheel steering system
Side pivot steering system

3. Fifth wheel steering system
Is is single pivot steering in which the front axle along with the wheels,moves to right or left.

4. Side pivot steering mechanism
Side pivot is further divided into two:
Davis Steering Gear
Ackerman Steering Gear
The main difference between the two steering gear mechanisms is that the Davis steering has sliding pairs , whereas the Ackermann steering has only turning pairs

5. Davis Steering Gear:
The Davis Steering gear as sliding pair , it has more friction than the turning pair , there fore the Davis Steering Gear wear out earlier and become inaccurate after certain time

6. Ackermann Steering Gear
Ackermann Steering Gear has only turning pair