Chapter 4 Running System Section 1 Introduction 1.The Functions of Running System (1)Changing the driving torque on the driving wheel into driving force of automobiles and tractors,and changing the rotating of the driving wheels into automobiles'moving on the ground. (2)Transferring and bearing the reacting force and torque that roads act on the wheels. (3)Easing the impact and vibration caused by uneven road to ensure good riding comfort of automobiles and tractors;besides, working together with steering system to achieve correct control of the driving directions,which ensures the control stability of the automobiles and tractors (4)Bearing all the weight of automobiles and tractors. 机械电子工程学度 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 4 Running System 1. The Functions of Running System (1) Changing the driving torque on the driving wheel into driving force of automobiles and tractors, and changing the rotating of the driving wheels into automobiles’ moving on the ground. (2) Transferring and bearing the reacting force and torque that roads act on the wheels. (3) Easing the impact and vibration caused by uneven road to ensure good riding comfort of automobiles and tractors; besides, working together with steering system to achieve correct control of the driving directions, which ensures the control stability of the automobiles and tractors. (4) Bearing all the weight of automobiles and tractors. Section 1 Introduction
Chapter 4 Running System Section 1 Introduction 2.Traveling Principle ↑，P Ya (b) Figure 4-1 Traveling principle of automobiles and tractors (a)Automobiles (b)Wheeled tractors Ma.Driving torque Pa.Driving force G.Gravity force Pre.Rolling resistance of front wheels PRolling resistance of rare wheels P.Traction resistance Y.Vertical reaction of front wheels Ya.Vertical reaction of rare wheels v.Heading 业机械电子工程学 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 4 Running System 2. Traveling Principle Figure 4-1 Traveling principle of automobiles and tractors (a) Automobiles (b) Wheeled tractors . Driving torque . Driving force G. Gravity force . Rolling resistance of front wheels . Rolling resistance of rare wheels . Traction resistance . Vertical reaction of front wheels . Vertical reaction of rare wheels . Heading Section 1 Introduction
Chapter 4 Running System Section 1 Introduction 3.The Components of Running System 3.1 The Composition of Automobiles'Running Systems Generally,the running system of automobile includes the frame, axles,wheels and suspension. Figure 4-2 The composition of automobiles'running systems 1.Front suspension 2.Frame 3.Rare suspension 4.Drive axle 5.Rare wheels 6.Front wheels 7.Driven axle 机械电子工程学度 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 4 Running System 3. The Components of Running System 3.1 The Composition of Automobiles’ Running Systems Generally, the running system of automobile includes the frame, axles, wheels and suspension. Figure 4-2 The composition of automobiles’ running systems 1. Front suspension 2. Frame 3. Rare suspension 4. Drive axle 5. Rare wheels 6. Front wheels 7. Driven axle Section 1 Introduction
Chapter 4 Running System Section 1 Introduction 3.2 Characteristics and Composition of Tractors'Running Systems Generally,wheeled tractors'running systems are composed by the frame,front axle and wheels Tractors are mainly used in fields,so their running systems have the following characteristics compared to automobiles: (1)Generally using larger diameter balloon tyres,and having raised patterns. (2)Guide wheel is small in diameter,and with one or several ring patterns. 业机械电子工程学聚 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 4 Running System 3.2 Characteristics and Composition of Tractors’ Running Systems Generally, wheeled tractors’ running systems are composed by the frame, front axle and wheels. Tractors are mainly used in fields, so their running systems have the following characteristics compared to automobiles: (1) Generally using larger diameter balloon tyres, and having raised patterns. (2)Guide wheel is small in diameter, and with one or several ring patterns. Section 1 Introduction
Chapter 4 Running System Section 1 Introduction (3)Great ground clearance,and that of some tractors is adjustable.Adjustable wheel base. (4)Generally not installed flexible suspension and shock absorbers on the rear axle;Rear axle and the body are rigid connection,but front axle and the body are hinged connection. (5)Wheels of paddy field tractors with high pattern tyres, inserted paddy wheels,paddy impeller,interval tread shoe,etc.. 机械电子工程学度 Automobile and Tractor Northwest A&F University
Automobile and Tractor Northwest A&F University Chapter 4 Running System (3) Great ground clearance, and that of some tractors is adjustable. Adjustable wheel base. (4) Generally not installed flexible suspension and shock absorbers on the rear axle; Rear axle and the body are rigid connection, but front axle and the body are hinged connection. (5) Wheels of paddy field tractors with high pattern tyres, inserted paddy wheels , paddy impeller, interval tread shoe, etc.. Section 1 Introduction