JPH0478066U

JPH0478066U -

Info

Publication number: JPH0478066U
Application number: JP12078990U
Authority: JP
Priority date: 1990-11-20
Filing date: 1990-11-20
Publication date: 1992-07-08
Anticipated expiration: 2005-11-20
Also published as: JPH084373Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す、第３図のＡ−
Ａ断面に相当する図、第２図はマスターシリンダ
を組み込んだ油圧ブレーキの回路図、第３図はマ
スターシリンダの正面図、第４図は従来のマスタ
ーシリンダを示す、第３図のＡ−Ａ断面図である
。１……油タンク、２……圧油ポンプ、３……リ
リーフ弁、４……逆止弁、５……アキユムレータ
、６……ブレーキ制御弁、７……マスターシリン
ダ、８……第一の圧油給排口、９……ピストン、
１０……第二の圧油給排口、１１……ホイルシリ
ンダ、１２……リザーバ、１３……ケーシング、
１４……シリンダ、１５……スリーブ、１６……
圧縮ばね、１７……給油孔、１８……制御弁、１
９……鍔部、２０……シール材、２１……弁体、
２２……給油通路、２３……係止部、２４……竪
孔、２５……ストツパ、２６……圧縮ばね、２７
，２８……ストツプリング、２９……蓋体、３０
……圧縮ばね。 Figure 1 shows an embodiment of the present invention;
Figure 2 is a circuit diagram of a hydraulic brake incorporating a master cylinder; Figure 3 is a front view of the master cylinder; Figure 4 shows a conventional master cylinder; FIG. 1... Oil tank, 2... Pressure oil pump, 3... Relief valve, 4... Check valve, 5... Accumulator, 6... Brake control valve, 7... Master cylinder, 8... First Pressure oil supply/discharge port, 9...piston,
10...Second pressure oil supply/discharge port, 11...Foil cylinder, 12...Reservoir, 13...Casing,
14...Cylinder, 15...Sleeve, 16...
Compression spring, 17... Oil supply hole, 18... Control valve, 1
9...Brim part, 20...Sealing material, 21...Valve body,
22... Oil supply passage, 23... Locking portion, 24... Vertical hole, 25... Stopper, 26... Compression spring, 27
, 28...stop spring, 29...lid body, 30
...Compression spring.

Claims

[Scope of utility model registration request]

A cylinder provided vertically within a casing, a piston oil-tightly fitted in the cylinder, a first spring that presses the piston downward, and a lower portion of the piston. , a first pressure oil supply and discharge port for supplying and discharging pressure oil into the cylinder; a second pressure oil supply and discharge port for supplying and discharging pressure oil from the cylinder at the upper part of the piston; An oil supply hole is formed at the top of the cylinder and communicates with the inside of the reservoir provided above the casing. In a hydraulic brake master cylinder consisting of a control valve that opens an oil supply hole, the control valve is
A rod-shaped valve body whose upper end engages with the oil supply hole in a vertically movable manner, and a sealing material is attached to the upper surface of a flange formed on the outer peripheral surface of the intermediate portion; a refueling passageway which opens toward the reservoir and whose other end opens directly above the sealing material; and a refueling passage provided between the upper end portion of the valve body protruding upward from the upper end opening of the refueling hole and the casing. a second spring which is provided at the lower end of the valve element and opens only at the upper end surface of the piston; It consists of a locking part inserted into the inside of the shaft so as to be able to rise and fall freely, and a stopper provided at the opening of the shaft to prevent the locking part from slipping out from inside the shaft, When the piston is completely lowered in the cylinder by the spring, the valve element is pulled up against the elasticity of the second spring due to the engagement between the locking part and the stopper, and the sealing material is pulled up by the second spring. A master cylinder for hydraulic brakes, characterized in that it is configured to be separated from the upper end surface of the cylinder.