JPH03118866U - - Google Patents
Info
- Publication number
- JPH03118866U JPH03118866U JP2664990U JP2664990U JPH03118866U JP H03118866 U JPH03118866 U JP H03118866U JP 2664990 U JP2664990 U JP 2664990U JP 2664990 U JP2664990 U JP 2664990U JP H03118866 U JPH03118866 U JP H03118866U
- Authority
- JP
- Japan
- Prior art keywords
- stepped
- hole
- cylinder body
- small diameter
- rear end
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Transmission Of Braking Force In Braking Systems (AREA)
Description
第１図は本考案に従つたマスタシリンダの一実
施例を示す断面図、第２図は本考案の変形例を示
す一部断面図である。
１０……マスタシリンダ、１１……シリンダボ
デイ、１１ａ……段付内孔、１１ｂ……小径孔、
１１ｃ……大径孔、１１ｄ……段部、１２……プ
ライマリピストン、１２ａ……大径部、１２ｂ…
…小径部、１６……プライマリカツプ、１７……
カツプシール、１９……ガイド部材、１９ａ……
フランジ部、１９ｂ……外筒部、２０……環状溝
、２１……Ｏリング、Ｒ１……プライマリ補給室
、Ｒ２……プライマリ圧力室。
FIG. 1 is a cross-sectional view showing an embodiment of a master cylinder according to the present invention, and FIG. 2 is a partial cross-sectional view showing a modification of the present invention. 10...Master cylinder, 11...Cylinder body, 11a...Stepped inner hole, 11b...Small diameter hole,
11c...Large diameter hole, 11d...Step part, 12...Primary piston, 12a...Large diameter part, 12b...
...Small diameter section, 16...Primary cup, 17...
Cup seal, 19... Guide member, 19a...
Flange portion, 19b... Outer cylinder portion, 20... Annular groove, 21... O ring, R1... Primary supply chamber, R2... Primary pressure chamber.
Claims (1)
ンダボデイと、前記段付内孔の小径孔に液密的に
軸方向に摺動可能に嵌挿される大径部と前記大径
孔を貫通して前記段付内孔外に延在する小径部と
を有したピストンと、該ピストンの小径部と前記
大径孔との間に配設されその外周リツプ部にて前
記大径孔に液密的に当接し且つその内周リツプ部
にて前記小径部に液密的に摺接する環状のカツプ
シールとを備え、前記ピストンの大径部の一側に
液圧管路に常時連通する圧力室が、前記ピストン
の大径部の他側と前記カツプシールとの間にリザ
ーバに補給孔を介して常時連通する補給室が夫々
形成されてなるマスタシリンダにおいて、前記ピ
ストンの小径部を軸方向に摺動自在に支承する内
孔を有するフランジ部と、前記シリンダボデイの
後端開口の外周に螺合もしくは圧入嵌合される外
筒部とを有したガイド部材を設け、該ガイド部材
のフランジ部にて前記シリンダボデイの開口端面
に当接させると共に前記カツプシールの背面を係
止させたことを特徴とするマスタシリンダ。 (2) 前記シリンダボデイの後端開口の外周に後
端側が小径の段付部を設け、該段付部の小径部に
前記ガイド部材の外筒部を螺合もしくは圧入嵌合
させると共に、前記段付部の段部と前記外筒部と
の間に形成される環状溝にシール部材を嵌着した
ことを特徴とする請求項(1)に記載のマスタシリ
ンダ。[Claims for Utility Model Registration] (1) A cylinder body having a stepped inner hole with a large diameter on the rear end opening side, and a cylinder body that is slidably inserted in the small diameter hole of the stepped inner hole in a fluid-tight manner in the axial direction. a piston having a large diameter portion extending through the large diameter hole and a small diameter portion extending outside the stepped inner hole; an annular cup seal that liquid-tightly contacts the large-diameter hole at an outer circumferential lip portion and slides liquid-tightly against the small-diameter portion at an inner circumferential lip portion; In a master cylinder, a pressure chamber is formed in constant communication with a hydraulic pressure pipe, and a replenishment chamber is formed in constant communication with a reservoir through a replenishment hole between the other side of the large diameter portion of the piston and the cup seal, A guide member having a flange portion having an inner hole that slidably supports the small diameter portion of the piston in the axial direction, and an outer cylindrical portion that is screwed or press-fitted to the outer periphery of the rear end opening of the cylinder body. A master cylinder comprising: a flange portion of the guide member that abuts the opening end surface of the cylinder body and locks the back surface of the cup seal. (2) A stepped portion having a small diameter on the rear end side is provided on the outer periphery of the rear end opening of the cylinder body, and the outer cylindrical portion of the guide member is screwed or press-fitted into the small diameter portion of the stepped portion; 2. The master cylinder according to claim 1, wherein a sealing member is fitted into an annular groove formed between the stepped portion of the stepped portion and the outer cylinder portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2664990U JPH03118866U (en) | 1990-03-15 | 1990-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2664990U JPH03118866U (en) | 1990-03-15 | 1990-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03118866U true JPH03118866U (en) | 1991-12-09 |
Family
ID=31529532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2664990U Pending JPH03118866U (en) | 1990-03-15 | 1990-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03118866U (en) |
-
1990
- 1990-03-15 JP JP2664990U patent/JPH03118866U/ja active Pending
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