| 摘要 |
In a plunger master brake cylinder ( 1 ), the closed end ( 5 ) of the main bore ( 3 ) is manufactured in one piece with the housing ( 2 ). The pistons ( 6,7 ) are inserted from the open end ( 4 ) of the main bore ( 3 ). In order to prevent the pistons ( 6,7 ) from slipping out of the main bore ( 3 ) prior to assembly in the vehicle, a retaining pin 23 is provided, which has a length greater than the diameter of the pistons ( 6,7 ) and than the diameter of the open end ( 4 ) of the main bore ( 3 ). The pin 23 extends through radial holes ( 20 ) in the spring retainer ( 13 ) of the compression spring 12 coupled to the outer piston ( 7 ). The pin is inserted through a small radial opening 26 in the housing 2 and is limited in its outward movement by a step ( 25 ) in the main bore ( 3 ).
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