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9-8-tormoznye-mekhanizmy-zadnikh-koles.html
9.8. Brake mechanisms of back wheelsBrake mechanisms of back wheels
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1 – cap;
2 – clamp;
3 – bolt of fastening of a wheel;
4 – brake drum;
5 – nave;
6 – pin;
7 – brake board;
8 – brake shoe;
9 – clamping spring;
10 – emphasis;
11 – tip of an expansion level
long;
12 – coupling spring (long);
13 – antisplash cover;
14 – cylinder;
15 – piston;
16 – cuff;
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17 – persistent ring;
18 – valve of production of air;
19 – valve cap;
20 – flexible hose;
21 – castle washer;
22 – axis;
23 – adjusting nut;
24 – tip of an expansion level short;
25 – razzhimny lever;
26 – cable tip;
27 – cable spring;
28 – cable;
29 – coupling spring (short);
30 – cutting washer;
And – openings with a carving for drum renting |
Type of brake mechanisms – drum, with one working cylinder and the self-established ("floating") blocks, with the device for automatic maintenance of a constant optimum gap between blocks and a drum (1,4–1,7 mm). Brake drums are cast from aluminum alloy with the pig-iron sleeves which are filled in in them.
Limits of the admissible sizes and iznos in the main interfaces of details of brake mechanisms of back wheels
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Name of details, mm
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Limit of the admissible size, mm (after boring)
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Limit of admissible wear,
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on thickness
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on diameter
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Brake drum
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231.6 (diameter)
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–
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Ovality to 0.2, conicity to 0.1
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Slip frictional blocks of a back wheel
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1.5 (without reaching block metal)
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3
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–
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Piston of the wheel cylinder of a back brake
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21.83 (diameter)
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–
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0,1
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