Front axles of Kamaz car
The front drive axle of KamAZ-4310 and KamAZ-43105 vehicles, while remaining steerable, at the same time transmits torque to the drive wheels.
Like the rear axles, the front one consists of the main gear, differential and axle shafts with constant velocity joints.
The half shaft of the front drive axle is made as one piece with the fist 12 (Fig. 1.) and is called the internal fist.
The inner fist is connected to the outer fist by a 29 cam-type universal joint of equal angular velocities.
The front drive axle housing is molded in one piece with the left short axle housing. The right casing is pressed into the axle housing.
The ball bearings 11 of the steering knuckle 4 are studded to the flanges of the casings.
The king pin is split and made in the form of two spikes welded to the ball joint. The steering knuckle housing 4 is put on these spikes.
Tapered roller bearings 17 are installed between the stud and the body.
The pins 1 and brake calipers 19 are attached to the bodies of the steering knuckles with pins.
Inside the trunnion, there is an external fist 29, rotating in a bronze bushing.
The wheel is driven from the outer fist 29 through the hub 26 and flange 28.
To lubricate the universal joint, 3 liters of a mixture of gear oil used for the main gears of drive axles and Litol 24 grease (50% each) are placed in the internal cavities of the steering knuckles.
The front axle of cars with a 6X4 wheel arrangement is a beam in which steering knuckles 6 and 21 are installed on 31 pins 10 fixed in it with wedges.
The stamped beam has an I-section, as well as two platforms for attaching springs connecting it to the frame.
The middle part of the beam is curved to allow for a lower engine mounting.
On the knuckle trunnion, with the help of a nut, two lock washers and a lock nut, the wheel hub is fixed, rotating on two tapered roller bearings.
In order to ensure the stabilization of the steered wheels, the axes of the holes for the kingpins are inclined in the transverse plane by 8°, and in the longitudinal plane by 3° back relative to the frame.
The steering knuckles can freely rotate on the pivots thanks to bearings in the form of two bushings 5 pressed into the eyes of the steering knuckles, and a thrust bearing consisting of a support ring 18, a washer 20 and installed between the lower ends of the beam lug and the steering knuckle.
Between the upper ends of the eye of the beam and the fist, washers 15 and 16 are installed, with the help of which the axial clearance in the pivot connection is adjusted.
The holes in the fists after installing the kingpin are closed with covers 3 and 12 with gaskets 4 to protect the bearings from dirt and dust.
The top cover, unlike the bottom one, has a safety valve 11 for the lubricant outlet.
Levers 25 and 28 are fixed in fists with nuts 7 with cotter pins 8.
The levers against turning in the fists are fixed with segment keys 22.
The angles of rotation of the fists are limited by stops 26, which, at maximum rotation, abut against the bosses of the beam.