| 摘要 |
PURPOSE: A booster device of a brake is provided to move to the advance and the retreat smoothly a piston and a valve flanger. CONSTITUTION: A booster device of a brake comprises: a valve body(6) to move freely in shell; a power piston(11) to equipped on a valve body(6); a constant pressure room(A, C) and transformation room(B, D) to be formed on the front and the rear of a power piston(11); a valve appliance(15) to change a connecting condition of a constant pressure room(A, B) and a transformation room(C, D) and to include a valve flanger(22); a solenoid(16) to drive a valve appliance(15) and to include a piston(56) being able to move. A piston(56) comprises a guide part of tub type(56A) at the front and a guide part of circular type(56B) at the rear, and inserts a guide part of tub type(56A) into a holder(42) and a guide part of circular type(56B) into a york(43) for moving freely. And a valve flanger(22) inserts the front part and the rear part into a housing for moving freely.
|
