JPS63184175U

JPS63184175U -

Info

Publication number: JPS63184175U
Application number: JP7563187U
Authority: JP
Priority date: 1987-05-20
Filing date: 1987-05-20
Publication date: 1988-11-28

Description

[Brief explanation of drawings]

第１図ないし第３図は本考案の一実施例を示し
、第１図はブレーキ制御装置の縦断面図、第２図
は同装置の一部の拡大断面図、第３図はポペツト
バルブが閉じた状態を示す断面図、第４図はバル
ブオペレーテイングロツドのストロークと入力と
の関係を示す図、そして第５図は従来装置の一部
を示す断面図である。１５…ハウジング、１６…ダイヤフラム、１７
…定圧室、１８…変圧室、２７…パワーピストン
、３４…バキユーム通路、３７…バルブオペレー
テイングロツド、４１…バルブプランジヤ、４４
…バルブシート、４５…ポペツトバルブ、４７…
ばね受け部材、５１…第１のばね、５２…第２の
ばね。 1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view of a brake control device, FIG. 2 is an enlarged cross-sectional view of a part of the same device, and FIG. 3 is a closed poppet valve. 4 is a diagram showing the relationship between the stroke of the valve operating rod and the input, and FIG. 5 is a sectional view showing a part of the conventional device. 15...Housing, 16...Diaphragm, 17
... constant pressure chamber, 18 ... variable pressure chamber, 27 ... power piston, 34 ... vacuum passage, 37 ... valve operating rod, 41 ... valve plunger, 44
...Valve seat, 45...Poppet valve, 47...
Spring receiving member, 51...first spring, 52...second spring.

Claims

[Claims for Utility Model Registration] A housing, a diaphragm provided within the housing to partition the interior of the housing into a constant pressure chamber and a variable pressure chamber, and a vacuum passageway attached to the diaphragm and communicating with the constant pressure chamber. a valve operating rod whose base end is connected to the brake pedal side and whose distal end is inserted into the power piston; and a valve that is provided at the distal end of the valve operating rod and reciprocates integrally with the rod. a plunger; and a poppet valve that is movable toward and away from a valve seat provided inside the power piston and that closes the vacuum passage in close contact with the valve seat when the valve plunger is advanced beyond a predetermined stroke. In the brake control device, a first spring is provided in a compressed state between a spring receiving member fixed in the power piston and the valve operating rod, and biases the valve operating rod in a direction to push it back; A brake device comprising: a second spring that is compressed between the spring receiving member and the poppet valve and biases the poppet valve in a direction to bring the poppet valve into close contact with the valve seat.