Chapter 5 Steering System Section 2 Wheeled Vehicle's Steering System Figure 5-5 Deflecting wheels steering mechanism 1.Knuckle arm 2.Tie rod 3.Drag link 4.Front axle 5.Longitudinal tie 6.Pitman arm 7.Steering gear 8.Steering wheel 械电子工程学度 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 5 Steering System Figure 5-5 Deflecting wheels steering mechanism 1. Knuckle arm 2. Tie rod 3. Drag link 4. Front axle 5. Longitudinal tie 6. Pitman arm 7. Steering gear 8. Steering wheel Section 2 Wheeled Vehicle’s Steering System
Chapter 5 Steering System Section 2 Wheeled Vehicle's Steering System 2.Steering control mechanism and steering gear 2.1 Steering Control Mechanism Steering wheels and joysticks are two forms of steering control mechanism.The angular travel of the steering wheels in idle phase called free travel. 2.2 Steering Gear The functions of steering gear are as follows:changing the rotation of the steering wheel to the swing of the pitman arm,changing the direction of the force and boosting it,and deflecting steering wheels through the drive mechanism.The basic requirements of wheeled vehicles to the steering gear are: 机被与电子工程学原 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 5 Steering System 2. Steering control mechanism and steering gear 2.1 Steering Control Mechanism Steering wheels and joysticks are two forms of steering control mechanism. The angular travel of the steering wheels in idle phase called free travel. 2.2 Steering Gear The functions of steering gear are as follows: changing the rotation of the steering wheel to the swing of the pitman arm, changing the direction of the force and boosting it, and deflecting steering wheels through the drive mechanism. The basic requirements of wheeled vehicles to the steering gear are: Section 2 Wheeled Vehicle’s Steering System
Chapter 5 Steering System Section 2 Wheeled Vehicle's Steering System (1)Transmission ratio should be large in order to saving labour when steering; (2)Transmission efficiency should be high; (3)transmission reversibility is appropriate,so that the ground conditions can be properly feedback to the steering wheel,and then the driver can obtain the "Road Sense"; (4)Steering gear clearance is adjustable in order to control the free travel of the steering wheel within the limit,which will maintain the control sensitive. 机械电子工程学 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 5 Steering System (1) Transmission ratio should be large in order to saving labour when steering; (2) Transmission efficiency should be high; (3) transmission reversibility is appropriate , so that the ground conditions can be properly feedback to the steering wheel, and then the driver can obtain the "Road Sense"; (4) Steering gear clearance is adjustable in order to control the free travel of the steering wheel within the limit, which will maintain the control sensitive. Section 2 Wheeled Vehicle’s Steering System
Chapter 5 Steering System Section 2 Wheeled Vehicle's Steering System 2.2.1 Cam and roller steering gear Features:Large transmission ratio,easy to operation,high transmission efficiency,Partially reversible. Figure 5-6 Cam and roller steering gear 1.Lower cover 2.Housing 3.Hourglass worm 4.Bevel bearing 5.Steering shaft 6. Roller shaft 7.Roller pin 8.Three teeth roller 9.Adjuster shim 10.U-shape washer 11. Nut 12.Copper sheathing 13.Rocker arm 14.Rocker arm shaft 机械持电子工程积 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 5 Steering System 2.2.1 Cam and roller steering gear Features: Large transmission ratio, easy to operation, high transmission efficiency, Partially reversible. Figure 5-6 Cam and roller steering gear 1. Lower cover 2. Housing 3. Hourglass worm 4. Bevel bearing 5. Steering shaft 6. Roller shaft 7. Roller pin 8. Three teeth roller 9. Adjuster shim 10. U-shape washer 11. Nut 12. Copper sheathing 13. Rocker arm 14. Rocker arm shaft Section 2 Wheeled Vehicle’s Steering System