| 摘要 |
PURPOSE:To prevent an engaging part from getting its permanent set as well as to secure the expected actuation, by installing a deforming part, which is elastically deformed at a time when such working force as being larger than energizing force of a valve spring works, in an actuating member of an atmospheric pressure type servo unit. CONSTITUTION:An input shaft 18 goes forward by operation of a pedal whereby a valve gear B is selected to a differential pressure generating position. A movable body 10 goes forward by means of differential pressure against a return spring 32, while an output shaft 15 receives moving force of the movable body 10 via a rubber disc 16 and an auxiliary member 81 and also receives input of the input shaft 18 via the rubber disc 16 and a plunger 17, making a piston of a master cylinder go forward and generating its pressure, and when the input of the shaft 18 and reaction force from the rubber disc 16 to the plunger 17 are balanced, the valve gear B comes to the differential pressure generatin position so that generated pressure in the master cylinder becomes constant. Owing to the rubber disc 16 of an actuating member 70, a problem of actuating play in a servo unit 1 itself is thus solvable. |
