You are here: Home » Service » Service » The Repair Manual of SINOTRUK HOWO HC16 Drive Axle 3

The Repair Manual of SINOTRUK HOWO HC16 Drive Axle 3

Views: 0 Author: Site Editor Publish Time: 2022-02-22 Origin: Site

Inquire

The Repair Manual of SINOTRUK HOWO HC16 Drive Axle 3

新重汽 32

1.1.2．Differential

In the process of automobile driving, there are two states such as rolling and sliding for

relative motion of wheel and road. Between them, the sliding can also be divided into two

kinds such as turn and slip sliding. Provided that the movement speed of wheel center

relating to road in wheel plane is U, the wheel rotation angular velocity is ω, and the pure

wheel rolling radius is rr ; If wrr U = , the movement of wheel to road is pure rolling; if

ω≠0, that is pure sliding turn when U=0; If U≠0, that is pure slip sliding when ω=0.

When an automobile turns in traveling, the curve distances of both inside and outside

wheel centers at the same time are different obviously, that means that the distance of

outside wheel is more than that of inside wheel. If both sides of wheels are fixed on the

same rigid shaft, the angular velocity of both wheels is same. Now, the outside wheel must

slip sliding while rolling, and the inside one must slip turning while rolling. Similarly, when

an automobile is driving straightly at uneven road, the actual curve distances of two side

wheels are different. Even if the road is very straight, the rolling radius of every tire is

different actually because of tire manufacturing size error, different wear degree, different

bearing loads, or different air charging pressures. Therefore, so long as the angular

velocity of every wheel is equal, there must be any wheel sliding on road. Any wheel

sliding on road can not only accelerate tire wear, increase automobile power consumption,

but also lead to the consequences such as deterioration of steering and braking

performance even broken axle.

Therefore, there shall not be any wheel slip as much as possible under normal driving

conditions. To this end, every wheel (especially driven wheel) may be guaranteed with

different angular velocities to rotate in structure.

If any driven gear of final drive may drive both sides of wheels at the same time through

one whole rigid axis, the angular velocity of two wheels can only be equal then. To enable

both sides of wheels rotating with different angular velocities necessarily and ensure

wheels under a pure rolling state, the whole axis driving both sides of wheels must be

disconnected (that shall be half axle). The device that can make both side wheels at the

same axle rotating with different angular velocities is called as differential. The kind of

differential can also be called as inter-wheel differential.

For multi-axis drive automobile, that among every drive axle is connected through a

driving shaft. If any driving wheel of every axle is rotating with same angular velocity, there

will be similar situation as the above wheels without differential. To make every drive axle

having different input angular velocities to eliminate any slip of every axle driving wheel,

there may be set with inter-axle differential among every drive axle.

When there is any larger difference of attached conditions among left/right or front/rear

driving wheel and road, any simple gear differential cannot guarantee that automobile get

enough traction force. Any driving wheel with poor adhesive conditions will slip with high

speed but automobile cannot move forward (see below). Therefore, any automobile with

the above situation shall be equipped with anti-slip differential.

驱动桥结构和原理图片 8

Figure 1-9 Exploded view of Symmetric Bevel Gear Differential

1 – Differential Case (left); 2 – Half Axle Gear Thrust Washer; 3 – Half Axle Gear; 4 – Planet Gear; 5 – Differential Case (right); 6 – Bolt; 7 – Spherical Gasket of Planet Gear; 8 – Planet Gear Shaft (cross shaft)

Symmetric bevel gear differential is used widely in automobile. For its structure, see

Figure 1-9.

Symmetrical inter-bevel gear differential is composed of planetary cone gear, planet gear

shaft (cross shaft), cone half axle gear and differential case. In Figure 1-10, differential

case is composed of Left Case 1 and Right Case 5 fixed with bolts. Driven gear of final

drive shall be fixed at the flange of Left Differential Case 1 with rivets or bolts. In fitting,

four axle journals of cross Planet Gear Shaft 8 are embedded in holes formed by

corresponding groove at two half faces of differential case. The subdivision surface of

differential case will pass through the centerline of every journal in planet gear shaft.

Every journal cover is floated with a Straight Bevel Planet Gear 4. All of them can mesh

with two Straight Bevel Half Axle Gears 3. Any journal of half axle gear will be supported at

corresponding left and right block holes of differential case as well as connected with half

axle through spline. The power may be output to driven wheels from driven gears of final

drive through differential case, cross shaft, planet gear, half axle gear and half axle. When

two side wheels are rotating with same speed, planet gear will rotate around half axle axis,

and this is revolution. If both side wheel resistances are different, planet gear will rotate

around its own axis (this is called as rotation) while having the above revolution movement.

Now, two half axle gears will drive two side wheels to rotate with different speeds.

驱动桥结构和原理图片 9

Figure 1-10 Symmetric Bevel Gear Differential Manufactured in SINOTRUK

1 – Differential Case (left); 2 – Adjustable Gasket; 3 – Half Axle Gear; 4 – Planet Gear; 5 – Differential Case (right); 6 – Bolt;7 – Planet Gear Gasket; 8 – Planet Gear Shaft (cross shaft);9 – Bush; 10 – Bush Retaining Ring

Differential of STR series drive axle manufactured in SINOTRUK is improved basing on

the structure of original STR differential structure, and its structure is same basically as

the above. SINOTRUK increases the cross-shaft diameter to improve its strength as well

as add Bush 9 and Bush Retaining Ring 10 between Planet Gear 4 and Cross Shaft 8 so

as to reduce any friction with cross shaft in planet wheel rotation, improve any lubrication

between them, and improve the life of entire differential assembly.

驱动桥结构和原理图片 10

Figure 1-15 Half Axle of STR Series Drive Axle

1.1.3. Half Axle and Axle Housing

1. Half Axle

For half axle of STR series drive axle, see Figure 1-15. The left diagram shows a half axle

at the side of differential lock. The half axle is a solid one for transferring power between

differential and driven wheel. Its inner end is connected with half axle gear of differential,

and its outer end is connected with wheel reducer. They may transfer engine torque from

engine to differential through drive shaft and final drive and lead to wheel reducer.

2. Axle Housing

The function of drive axle housing is to support and protect final drive, differential and half

axle to make axial relative position of left and right driven wheels being stationary as well

as support frame and every assembly on it together with driven axle. When driving, an

automobile can bear road surface reaction force and torque from wheels and transfer to

frame through suspension. For any housing of STR series drive axle, see Figure 1-16.

配件驱动桥桥壳 2-1

Figure 1-16 Three-Section STR Series Drive Axle Housing

新重汽 36

We are the agency for SINOTRUK wholesale truck series, we can supply HOWO tractor trucks, HOWO dump trucks, trailer truck, truck parts, agricultural machinery, agricultural machinery parts,HOWO concrete mixer trucks, special trucks and so on.we can supply trucks for our clients with good quality and competitive price, because we get directly support from the CNHTC factory.

新重汽 37