The brake air chamber is also called the wheel cylinder, and its function is to convert the pressure of the compressed air into the mechanical force that rotates the brake camshaft to realize the braking action.
The brake air chamber is of the clamp-on-diaphragm type. The size of the front and rear brake chambers is different, but the structure is basically the same, as shown in the figure. It consists of air inlet, cover, diaphragm, support plate, aftertaste spring, housing, push rod, connecting fork, clamp and bolt, etc.
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Item No.
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Stroke(mm)
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R1(mm)
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R2(mm)
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L1
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L2
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L3
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Weight
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Push Rod Thread Length
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|||||||
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LH-BC-116
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64
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116
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93
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123±5
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240±5
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209±4
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4.10
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LH-BC-125
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64
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125
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105
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123±5
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285±5
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255±4
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4.80
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Brake chamber function
When the car brakes, the air enters the brake air chamber from the air inlet, deforms the diaphragm under the action of air pressure, pushes the push rod, and drives the brake adjustment arm, rotates the brake cam, and removes the brake shoe friction plate. Press against the brake drum to brake.
When the car is released from the brake, the compressed air in the brake air chamber is discharged into the atmosphere through the double-chamber brake valve or the quick release valve, and the diaphragm and push rod return to their original state under the action of the return spring.