JPH03120265U

JPH03120265U -

Info

Publication number: JPH03120265U
Application number: JP2856990U
Authority: JP
Priority date: 1990-03-21
Filing date: 1990-03-21
Publication date: 1991-12-10

Description

[Brief explanation of drawings]

第１図は本考案に従つた負圧式倍力装置の一実
施例を示す断面図、第２図は第１図におけるキー
部材のＡ−Ａ矢視図、第３図は第１図におけるリ
アクシヨンデイスクの断面図、第４図は第１図に
おけるリング部材の展開図、第５図は第１図にお
けるリング部材の正面図である。１０……負圧式倍力装置、１２……パワーピス
トン、２０……制御弁機構、２１……コントロー
ルバルブ、２２……バルブプランジヤ、２６……
キー部材、２６ａ……二股部、３２……出力ロツ
ド、３２ａ……筒部、３４……大径孔、３５……
リアクシヨンデイスク、３６……小径孔、３７…
…段部、３８……リング部材、３８ａ……突出部
、３９……貫通孔、４０……孔。 FIG. 1 is a cross-sectional view showing an embodiment of the negative pressure booster according to the present invention, FIG. 2 is a view taken along arrow A-A of the key member in FIG. 1, and FIG. 4 is a developed view of the ring member in FIG. 1, and FIG. 5 is a front view of the ring member in FIG. 1. DESCRIPTION OF SYMBOLS 10... Negative pressure booster, 12... Power piston, 20... Control valve mechanism, 21... Control valve, 22... Valve plunger, 26...
Key member, 26a...bifurcated part, 32...output rod, 32a...cylindrical part, 34...large diameter hole, 35...
Reaction disk, 36...Small diameter hole, 37...
...Stepped portion, 38...Ring member, 38a...Protrusion, 39...Through hole, 40...Hole.

Claims

[Claims for Utility Model Registration] (1) A control valve mechanism that is operated by a push rod to control the pressure difference between the front and rear chambers of the power piston is built into the power piston, and the power piston is operated by the pressure difference to control the pressure difference between the front and rear chambers of the power piston. A large diameter hole into which the rear end of the output rod for extracting the forward thrust generated in the piston to the outside is slidably inserted in the axial direction, communicates with the large diameter hole via a stepped portion and is connected to the front end of the push rod. a small diameter hole into which the front end of the valve plunger in the control valve mechanism is fitted so as to be slidable in the axial direction; and a key that engages with the valve plunger to regulate the amount of axial movement of the valve plunger. a radial hole into which the member is inserted;
A rubber compressed by the power piston, the valve plunger, and the output rod during boosting operation is provided between the step between the large diameter hole and the small diameter hole of the power piston and the rear end of the output rod. In a negative pressure booster in which a reaction disk made of a material is disposed, a limb member having a protrusion perpendicular to the contact surface on the outer peripheral edge of the contact surface of the reaction disk with the stepped portion of the power piston is provided. A through hole is provided in the stepped portion of the power piston that axially penetrates the radial hole, a hole is provided in the key member coaxially with the through hole, and the protruding portion of the ring member is provided with a through hole that penetrates the radial hole in the axial direction. A negative pressure booster characterized by comprising a hole and a negative pressure booster inserted into the hole. (2) A cylindrical portion extending rearward is provided at the rear end of the output rod, and the reaction disk is housed in the cylindrical portion, and the cylindrical portion is fitted in an annular shape so as to be slidable in the axial direction. Claim characterized in that a groove is provided on the outer peripheral edge of the stepped portion of the power piston.
The negative pressure booster described in (1).