Steering
1 - lateral thrust; 2 - bipod; 3 - medium thrust; 4 - pendulum lever; 5 - adjusting clutch; 6 - lower ball joint of the front suspension; 7 - right rotary fist; 8 - upper ball joint of the front suspension; 9 – the right lever of a rotary fist; 10 - pendulum arm bracket; 11 – right side member of the body; 12 - plug of the oil-filling hole; 13 – crankcase of the steering gear; 14 - steering shaft; 15 – a facing casing of a shaft of a steering; 16 - steering wheel; 17 – a pipe of the top support of a shaft of a steering; 18 – an arm of a shaft of a steering; 19 – left side member of the body; 20 – coupling collars of the adjusting clutch; 21 - left rotary fist
The steering consists of a steering mechanism and a steering gear.
The steering mechanism includes a worm gear located in the crankcase (see fig. Steering) 13, steering wheel 16, steering wheel shaft 14 and fastening details.
The steering wheel is plastic, reinforced with a steel frame. A sound signal switch is installed on the wheel, the contact part of which is closed with a plastic cover. The steering wheel hub has a hole with a double cavity, and the shaft 14 has a double slot, due to which the steering wheel is attached to the shaft with a nut in only one position.
The steering shaft with its tip is connected to the worm shaft with the help of splines and a coupling bolt. The upper part of the shaft rests on a plastic sleeve mounted on the pipe 17 of the upper support. This pipe is inserted into the bracket 18 and fixed in it with a clamp, which is tightened with a bolt. A switch for direction indicators and headlights is attached to the flange of the pipe of the upper shaft support.
The crankcase of the steering mechanism is attached to the left side member 19 of the body from the inside of the engine compartment with three bolts. Adjusting washers are installed between the crankcase and the spar, which, during assembly, achieve alignment of the worm shaft and the steering shaft.
In crankcase 7 (see fig. Section of the crankcase of the steering mechanism) a worm 6 is located, which is engaged with a double-ridged roller 14 of the bipod shaft 13. The gear ratio of the worm pair is 16.4. The worm rotates in the upper 16 and lower 17 bearings, the balls of which are located on the treadmills of the ends of the worm. The axial clearance in the worm bearings is regulated by the selection of gaskets 18 between the crankcase and the cover 19. The bipod shaft rotates in two bushings 12 pressed into the steering gear housing. At the upper end of the shaft, roller 14 rotates on a needle bearing, and a bipod 8 is put on the lower end of the shaft, which has conical splines, and a bipod 8 is put on and fastened with a nut 9. Two double cavities are made in the spline hole of the bipod, and two double protrusions are made on the shaft. Therefore, the bipod can be mounted on the shaft in only one position.
The engagement of the roller with the worm is adjusted by screw 2. The axial clearance between the screw head and the shaft groove is eliminated by selecting adjusting plates 1.
TAD-17 oil is poured into the crankcase of the steering gear at the level of the filler hole, closed with plug 4.
The steering gear includes three rods - middle 3 (see fig. Steering) and two extreme 1, as well as a bipod 2, a pendulum lever 4 with a bracket 10 on the side member 11 and swivel levers 9 of the knuckles 7 and 21. The middle rod is one-piece, has ball joints at the ends for connection with the pendulum lever and the steering arm. Each side rod consists of two threaded ends connected to each other by an adjusting clutch 5. The clutches are fixed on the rods with the help of clamps 20. The rotation of the clutch 5 changes the length of the side rod when adjusting the toe of the front wheels. The ends of the extreme rods with the help of hinges are attached to the levers 9 of the steering knuckles, to the pendulum lever 4 and to the steering arm 2.
The ball joint of the rods consists of a steel pin 1 (see fig. Cross section of the ball joint), the spherical head of which is covered by a conical split plastic insert 4, which is pressed by the spring 5 to the body 3, due to which an interference is created in the connection of the pin with the insert and the thrust tip.
During assembly, the ball joints are filled with SRB-4 grease and sealed on one side with a plug 6 rolled in the rod end, and on the other side with a protective cap 2.
Bracket 10 (see fig. Steering) the pendulum lever is attached with two bolts to the right side member of the body opposite the steering gear housing. In bracket 2 (see fig. Cross section of pendulum arm bracket) two plastic bushings 8 are installed, in which the axis 9 rotates. During assembly, Litol-24 grease is placed in the bracket. The end seal of the bushings is provided by seals 7 and washers 6 and 10.