JPH02121469U - - Google Patents
Info
- Publication number
- JPH02121469U JPH02121469U JP3155789U JP3155789U JPH02121469U JP H02121469 U JPH02121469 U JP H02121469U JP 3155789 U JP3155789 U JP 3155789U JP 3155789 U JP3155789 U JP 3155789U JP H02121469 U JPH02121469 U JP H02121469U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- hole
- valve
- stem
- hydraulic pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 1
Landscapes
- Transmission Of Braking Force In Braking Systems (AREA)
Description
第１図は本考案の一実施例を示す自動二輪車の
リアブレーキ用液圧マスタシリンダの断面正面図
、第２図は他の実施例を示す要部断面図である。
１……液圧マスタシリンダ、２……シリンダボ
デイ、２ａ……アウトレツトポート、２ｃ……連
通孔、３……シリンダ孔、３ａ……大径孔、４…
…プツシユロツド、５……ピストン、６……液圧
室、９……ストツプリング、１１……リターンス
プリング、１２……バルブステム、１３……ステ
ム孔、１４……リリーフポート、１５……液通孔
、１６……バルブ、１７……バルブスプリング、
１９……ナツト部材、１９ｃ……底壁、２０……
ロツクナツト、Ｓ……リリーフポート１４とバル
ブ１６との間に設定される無効ストローク。
FIG. 1 is a sectional front view of a hydraulic master cylinder for a rear brake of a motorcycle showing one embodiment of the present invention, and FIG. 2 is a sectional view of essential parts showing another embodiment. DESCRIPTION OF SYMBOLS 1...Hydraulic pressure master cylinder, 2...Cylinder body, 2a...Outlet port, 2c...Communication hole, 3...Cylinder hole, 3a...Large diameter hole, 4...
... Push rod, 5 ... Piston, 6 ... Hydraulic pressure chamber, 9 ... Stop ring, 11 ... Return spring, 12 ... Valve stem, 13 ... Stem hole, 14 ... Relief port, 15 ... Liquid passage hole , 16... Valve, 17... Valve spring,
19... Nut member, 19c... Bottom wall, 20...
Lock nut, S... Invalid stroke set between relief port 14 and valve 16.
Claims (1)
、シリンダ孔の底部とピストンとの間に画成され
る液圧室に、ピストンをシリンダ孔の開口側へ付
勢するリターンスプリングを縮設し、シリンダ孔
の底壁に、液圧室とブレーキ等の液圧作動装置と
を連通するアウトレツドポートを形成すると共に
、シリンダ孔の周壁にリザーバと連通する連通孔
を形成し、ピストンの前進時に、該ピストンの中
心軸上に設けたバルブにて、前記リザーバと液圧
作動装置との連通を遮断して、液圧室に圧液を発
生させるセンタバルブ型車両用液圧マスタシリン
ダにおいて、前記ピストンにステム孔を後端側に
開口して設け、該ピストンの先端に、ステム孔と
前記液圧室とを連通するリリーフポートを、また
ピストンの周壁に、ステム孔と前記連通孔とを連
通する液通孔をそれぞれ形成し、先端に前記リリ
ーフポートを閉塞するバルブを装着したバルブス
テムを前記ステム孔に内挿すると共に、ピストン
の後退限でバルブステムをピストンの後端側へ弾
発して、リリーフポートからバルブを離間させる
バルブスプリングを、ステム孔の底部とバルブス
テムとの間に介装し、ピストンから突出するバル
ブステムの後端を、プツシユロツド等の操作部材
に当接せしめ、且つ前記シリンダ孔の開口側と操
作部材との間に、操作部材の後退限を調整可能に
規制するストツパ手段を設けたことを特徴とする
センタバルブ型車両用液圧マスタシリンダ。 A piston for generating hydraulic pressure is inserted into the cylinder hole, and a return spring that biases the piston toward the opening side of the cylinder hole is compressed in the hydraulic pressure chamber defined between the bottom of the cylinder hole and the piston. , an outlet port is formed on the bottom wall of the cylinder hole to communicate the hydraulic pressure chamber with a hydraulic pressure operating device such as a brake, and a communication hole is formed on the peripheral wall of the cylinder hole to communicate with the reservoir, so that when the piston moves forward, , a center valve type vehicle hydraulic master cylinder in which a valve provided on the central axis of the piston cuts off communication between the reservoir and the hydraulic actuator to generate pressure fluid in the hydraulic chamber; The piston is provided with a stem hole opening toward the rear end side, a relief port is provided at the tip of the piston to communicate the stem hole and the hydraulic pressure chamber, and a relief port is provided in the peripheral wall of the piston to communicate the stem hole and the communication hole. A valve stem having a valve for closing the relief port at its tip is inserted into the stem hole, and the valve stem is rebound toward the rear end of the piston at the retraction limit of the piston. A valve spring that separates the valve from the relief port is interposed between the bottom of the stem hole and the valve stem, and the rear end of the valve stem protruding from the piston is brought into contact with an operating member such as a push rod; A center valve type hydraulic master cylinder for a vehicle, characterized in that a stopper means is provided between the opening side of the cylinder hole and the operating member to adjustably restrict the retraction limit of the operating member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3155789U JPH0541095Y2 (en) | 1989-03-20 | 1989-03-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3155789U JPH0541095Y2 (en) | 1989-03-20 | 1989-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02121469U true JPH02121469U (en) | 1990-10-02 |
| JPH0541095Y2 JPH0541095Y2 (en) | 1993-10-18 |
Family
ID=31257493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3155789U Expired - Lifetime JPH0541095Y2 (en) | 1989-03-20 | 1989-03-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0541095Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008273420A (en) * | 2007-05-01 | 2008-11-13 | Nissin Kogyo Co Ltd | Center valve type hydraulic master cylinder |
-
1989
- 1989-03-20 JP JP3155789U patent/JPH0541095Y2/ja not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008273420A (en) * | 2007-05-01 | 2008-11-13 | Nissin Kogyo Co Ltd | Center valve type hydraulic master cylinder |
| JP4690359B2 (en) * | 2007-05-01 | 2011-06-01 | 日信工業株式会社 | Center valve type hydraulic master cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0541095Y2 (en) | 1993-10-18 |