8.3.1. Features of the device
Shock-absorbers of forward and back suspension brackets
| 1 – the bottom eye;
2 – the case of the valve of compression;
3 – disks of the valve of compression;
4 – a throttle disk of the valve of compression;
5 – a spring of the valve of compression;
6 – a holder of the valve of compression;
7 – a plate of the valve of compression;
8 – a nut of the valve of return;
9 – a spring of the valve of return;
10 – the shock-absorber piston;
11 – a plate of the valve of return;
12 – disks of the valve of return;
13 – a piston ring;
14 – a washer of a nut the return valve;
15 – a throttle disk of the valve of return;
16 – a plate перепускного the valve;
17 – a spring перепускного the valve;
18 – a restrictive plate;
19 – the tank;
20 – a rod;
21 – the cylinder;
|22 – a casing;
23 – the directing plug of a rod;
24 – a sealing ring of the tank;
25 – a holder of an epiploon of a rod;
26 – a rod epiploon;
27 – a lining of a protective ring of a rod;
28 – a protective ring of a rod;
29 – a tank nut;
30 – the top eye of the shock-absorber;
31 – a nut of fastening of the top end of the shock-absorber of a forward suspension bracket;
32 – a spring washer;
33 – a washer of a pillow of fastening of the shock-absorber;
34 – pillows;
35 – распорная the plug;
36 – a casing of the shock-absorber of a forward suspension bracket;
37 – the rod buffer;
38 – резинометаллический the hinge
Shock-absorbers of forward and back suspension brackets differ in the sizes, in the way of fastening of the top part and presence of the buffer of 37 returns at the forward shock-absorber which limits a shock-absorber course at a return course. Besides, the forward shock-absorber has other parametres of performance data.
The back shock-absorber consists of the tank 19 with an eye, the compression valve (poses. 2, 3, 4, 5, 6, 7), the working cylinder 21, a rod 20 with the piston 10 and valves of return and перепускным, and a casing 22 with an eye.
The tank 19 is made of a steel pipe on which bottom end the eye 1 is welded, and in the top part the carving for a nut 29 is cut. The case is inserted Into eye bore 2 valves of compression in gathering with valve disks. It is drawn in to bore by the working cylinder 21. The ring space between the tank and the cylinder is filled by a liquid. In the working cylinder the rod 20 with the piston 10 is located. The piston has the vertical channels located on two circles. Channels on a small circle are closed from below by disks 12 and 15 valves of return, and on большей – from above a plate 16 перепускного the valve.
The compression valve is located in the bottom part of the cylinder. In the case 2 valves are executed a nest to which 7 disks 3 and 4 are drawn in by a spring 5 through a plate. The disk 4 throttle, has cut, through which дросселируется a liquid at small speed of moving of the piston. In the bottom part of the case of the valve it is executed cylindrical проточка and four vertical channels, and in a holder 7 six lateral apertures and one central through which the liquid passes from the tank in the cylinder and back.
From above in the cylinder the directing plug 23 which is condensed in the tank with a ring 24, and a rod exit - an epiploon 26 with a holder 25 is established. All details located in the top part of the cylinder, are drawn in by a nut 29 for which from above is available four apertures for a special key.
In eyes of shock-absorbers запрессованы резинометаллические hinges 38.
Check of shock-absorbers at the stand
The working diagramme of the shock-absorber
For definition of working capacity of the shock-absorber check up on динамометрическом the stand its working diagramme.
| 1 – effort at a return course;
||2 – effort at a compression course
Working diagrammes remove according to the instruction applied on the stand, after performance not less than 5 running cycles, at temperature of a working liquid of the shock-absorber 20+5 ° With, frequency of rotation of a flywheel 1 с-1 (60 mines-1) and length of a course of a rod of 80 mm for the forward shock-absorber and 100 mm – for back.
The diagramme curve should be smooth, and in transition points (from a return course to a compression course) without the sites parallel to a zero line.
Estimation of results under the diagramme. Resistance of a course of return and compression define on the greatest co-ordinates of corresponding diagrammes.
The highest point of a curve of a course of return at scale 47 Н (4,8 кгс) on 1 mm should be from a zero line on distance And, equal: 21-28 mm for forward shock-absorbers, 19–26 mm for back shock-absorbers.
The highest point of a curve of a course of compression at the same scale should be from a zero line on distance In, equal: 3,5-6,5 mm for forward shock-absorbers; 4,5-7,5 mm – for back.
Control values of ordinates on diagrammes of forward and back shock-absorbers are set for cold shock-absorbers at temperature амортизаторной liquids 20±5 ° With.
After check remove the shock-absorber from the stand and, if necessary, touch and replace the damaged details.
Repeat test to make sure of serviceability of the shock-absorber.