JP2545061Y2 - Resin piston for master cylinder - Google Patents
Resin piston for master cylinderInfo
- Publication number
- JP2545061Y2 JP2545061Y2 JP1990110244U JP11024490U JP2545061Y2 JP 2545061 Y2 JP2545061 Y2 JP 2545061Y2 JP 1990110244 U JP1990110244 U JP 1990110244U JP 11024490 U JP11024490 U JP 11024490U JP 2545061 Y2 JP2545061 Y2 JP 2545061Y2
- Authority
- JP
- Japan
- Prior art keywords
- flange portion
- piston
- master cylinder
- sealing member
- flange
- 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.)
- Expired - Fee Related
Links
Landscapes
- Transmission Of Braking Force In Braking Systems (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は車両等のクラッチ装置で使用されるマスタシ
リンダの２分割一体型の合成樹脂製ピストンに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a two-part integral type synthetic resin piston of a master cylinder used in a clutch device of a vehicle or the like.
〔従来の技術〕 この種のピストンとしては、従来、実開昭63-180459
号公報に記載されたものがある。[Prior art] Conventionally, this type of piston has been
Is described in Japanese Patent Application Publication No.
この公報の第５図に示すピストンは別体として形成し
た第１部材と第２部材とを同軸に結合し、第１部材に形
成した前部のフランジ部（摺動部）から突出する部分に
密封部材を嵌着し、この第１部材の後端に形成したフラ
ンジ部（摺動部）と第２部材の後端に形成したフランジ
部分との間に密封部材を嵌着している。In the piston shown in FIG. 5 of this publication, a first member and a second member formed separately are coaxially connected to each other, and the piston protrudes from a front flange portion (sliding portion) formed on the first member. A sealing member is fitted, and the sealing member is fitted between a flange portion (sliding portion) formed at a rear end of the first member and a flange portion formed at a rear end of the second member.
このように、ピストンを２分割とすることにより、各
フランジ部の外周に、ピストンを樹脂成型する際のバリ
が発生しないようにしている。すなわち、前方側の部材
の前後のフランジ部および密封部材装着部は、軸方向に
分割される金型により成型され、その間の部分は径方向
に分割される金型により成型される。また、後方側の部
材は、全体を軸方向に分割される金型により成型され
る。したがって、ピストンのシリンダ孔に対する摺動部
である各フランジ部および密封部材装着部には、金型の
接合面によるバリが発生せず、ピストンの摺動特性およ
び密封部材の密封性を低下させることがないようにして
いる。As described above, by dividing the piston into two parts, burrs when the piston is molded with resin are prevented from being generated on the outer periphery of each flange portion. That is, the front and rear flange portions and the sealing member mounting portion of the member on the front side are molded by a mold divided in the axial direction, and a portion therebetween is molded by a mold divided in the radial direction. The member on the rear side is molded by a mold that is entirely divided in the axial direction. Therefore, burrs due to the joining surface of the mold do not occur in each flange portion and the sealing member mounting portion which are sliding portions with respect to the cylinder hole of the piston, and the sliding characteristics of the piston and the sealing performance of the sealing member are reduced. There is no.
このような分割型のピストンでは第１部材と第２部材
の両部材を別々に形成して結合するため、上記公報第１
図に示す構造では、結合ずれが生じる恐れがあり、結合
ずれが生じたピストンをマスタシリンダのシリンダ本体
に挿入すると、摺動特性が低下する。In such a split-type piston, both the first member and the second member are separately formed and connected.
In the structure shown in the figure, there is a possibility that the displacement may occur, and when the piston in which the displacement has occurred is inserted into the cylinder body of the master cylinder, the sliding characteristics deteriorate.
これを防止するためには、上記公報第５図のようにフ
ランジ部の数を増やせばよいが、１つの部材に前後２つ
のフランジ部を設けて後部のフランジ部と第２部材の後
端フランジ部分との空間に密封部材を嵌着するようにす
ると、エヤー抜きを行なっても、上記空間に空気が残留
し、マスタシリンダの所望の作動特性が得られなくな
る。In order to prevent this, the number of flanges may be increased as shown in FIG. 5 of the above-mentioned publication. However, one member is provided with two front and rear flanges, and a rear flange and a rear end flange of the second member are provided. If the sealing member is fitted in the space with the portion, even if air is removed, air remains in the space, and the desired operating characteristics of the master cylinder cannot be obtained.
エア抜きを行う際のこのような問題を解決するため
に、前方側の部材の後端に形成したフランジ部に前後を
連通する通路を形成することが考えられるが、この通路
を孔として形成した場合には、次のような問題がある。In order to solve such a problem at the time of bleeding air, it is conceivable to form a passage communicating front and rear with a flange formed at the rear end of the front member, but this passage is formed as a hole. In such a case, there are the following problems.
すなわち、後方側の部材の樹脂成型時、この孔を形成
するために金型内で孔が位置する箇所にピンを設け、金
型内に樹脂を充填する。このとき、ピンが設けられてい
ると、樹脂の流れに乱流が生じ、フランジ部の摺動部表
面にムラが発生し、フランジ部の摺動特性を低下させ
る。特に、ガラス繊維等の強化繊維を含んだ樹脂の場
合、強化繊維が均質に充填されない。さらに、ピンを設
けることにより、樹脂充填後の冷却の際に、ピンの周囲
の冷却速度が速くなり、ヒケを生じ、フランジ部の所望
の形状を得られず、摺動特性の低下の原因となる。That is, at the time of resin molding of the rear member, a pin is provided at a position where the hole is located in the mold to form the hole, and the resin is filled in the mold. At this time, if the pins are provided, a turbulent flow occurs in the flow of the resin, and unevenness occurs on the surface of the sliding portion of the flange portion, thereby deteriorating the sliding characteristics of the flange portion. In particular, in the case of a resin containing reinforcing fibers such as glass fibers, the reinforcing fibers are not uniformly filled. Furthermore, by providing the pins, during cooling after filling the resin, the cooling rate around the pins increases, causing sink marks, failing to obtain a desired shape of the flange portion, and causing a decrease in sliding characteristics. Become.
本考案は、上記問題を解決するためになされたもので
あって、１つの部材に前後２つのフランジ部を設ける
が、フランジ部の摺動特性を低下させることなく、エア
抜き後の空気の残留の恐れが無いマスタシリンダ用樹脂
ピストンを提供することを目的とする。The present invention has been made in order to solve the above-mentioned problem. In this case, two flange portions are provided on one member before and after the air is removed without reducing the sliding characteristics of the flange portions. It is an object of the present invention to provide a resin piston for a master cylinder which is free from fear of occurrence.
本考案は、上記目的を達成するためになされたもの
で、２部材のうち、前方側の部材に、後方側密封部材に
接近して第３のフランジ部を形成するとともに、この第
３のフランジ部の外周に前後を連通する通路を溝として
形成したものである。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. Among the two members, a third flange portion is formed on a front member close to a rear sealing member, and a third flange portion is formed. A passage is formed as a groove on the outer periphery of the portion to communicate the front and rear.
本考案では、この第３のフランジ部の外周に前後を連
通する通路を溝として形成したので、ピストンを樹脂成
型する際に、通路を形成するためのピンを用いる必要が
ないため、樹脂の乱流やヒケを発生することがないの
で、第３のフランジ部の摺動特性を低下させず、良好な
摺動特性を得ることができる。さらに、この溝を介して
第３のフランジ部と後方密封部材との間にできる空間が
マスタシリンダの圧力室もしくは液補給室に連通するの
で、上記空間に空気が残留する恐れはない。In the present invention, since a passage communicating front and rear with the outer periphery of the third flange portion is formed as a groove, it is not necessary to use a pin for forming the passage when molding the piston with a resin. Since no flow or sink occurs, good sliding characteristics can be obtained without reducing the sliding characteristics of the third flange portion. Further, since a space formed between the third flange portion and the rear sealing member through this groove communicates with the pressure chamber or the liquid supply chamber of the master cylinder, there is no possibility that air will remain in the space.
以下、本考案の１実施例を図面を参照して説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
なお、図１は、本考案の実施例を示す縦断面図であっ
て、同図中のシリンダ孔２に区画された圧力室７側（図
中左側）を前方とし、シリンダ孔２の開口側（図中右
側）を後方として説明する。FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, in which the pressure chamber 7 side (left side in the figure) defined by the cylinder hole 2 in FIG. (The right side in the figure) will be described as backward.
第１図において、10は第１部材であって、後端に後方
のフランジ部11を有し、先端側には先端面から突出する
嵌合突部12が形成され、この嵌合突部12端面から部材後
端に向かう孔13が設けられている。第１部材10の後端面
には図示しないロッドの先端が係合するロッド係合部14
が形成されている。20は第２部材であって、前方のフラ
ンジ部21と第３のフランジ部22とを有し、前方のフラン
ジ部21から第３のフランジ部22の近傍までの部分は、第
３図に示す如き断面十字形の軸体23をなし、部材後端に
は端面に開口する段付き凹部24が形成され、部材先端は
前方のフランジ部21から突出する段付き突出部25となっ
ている。第３のフランジ部22の外周面には、第２図に示
す如く、周方向所定間隔を隔てて軸方向の通路（溝）26
が形成されており、この第３のフランジ部22の端面の相
隣り合う通路26間の円弧方向中央部分からは軸方向後方
へ突出する短い突起27が突出している。30はばね受けと
なる第３部材であって、後端部31が若干大径である短筒
状をなし、後端部31外周から後方に向かって伸びる環状
部32を有している。第３部材30の上記若干大径部分の外
周には戻しばねの一端を受ける複数の突起33が形成され
ている。In FIG. 1, reference numeral 10 denotes a first member, which has a rear flange portion 11 at a rear end, and a fitting protrusion 12 projecting from a front end surface formed at a front end side. A hole 13 is provided from the end face toward the rear end of the member. A rod engaging portion 14 with which the tip of a rod (not shown) engages with the rear end surface of the first member 10.
Are formed. Reference numeral 20 denotes a second member having a front flange portion 21 and a third flange portion 22, and a portion from the front flange portion 21 to the vicinity of the third flange portion 22 is shown in FIG. A shaft 23 having a cross-shaped cross section as described above is formed, and a stepped concave portion 24 is formed at the rear end of the member, and is open at the end face. As shown in FIG. 2, an axial passage (groove) 26 is provided on the outer peripheral surface of the third flange portion 22 at a predetermined circumferential interval.
A short protrusion 27 protruding rearward in the axial direction protrudes from a central portion in the arc direction between adjacent passages 26 on the end face of the third flange portion 22. Reference numeral 30 denotes a third member serving as a spring receiver. The rear end 31 has a short cylindrical shape having a slightly larger diameter, and has an annular portion 32 extending rearward from the outer periphery of the rear end 31. A plurality of projections 33 for receiving one end of the return spring are formed on the outer periphery of the slightly larger diameter portion of the third member 30.
第１部材10と第２部材20とは、その嵌合突部12を第２
部材20の段付き凹部24に嵌入して当接し合う段部を互い
に越音波溶融着などの溶着手段により結合され、その後
密封部材41を嵌着される。なお、段部に隣接した空所ｂ
により溶融した樹脂が凹部24より流出しないようにして
ある。第２部材20の第３のフランジ部22は第１部材10の
後方のフランジ部11との間に密封部材41のための溝状空
間Ａを区画し、この結合状態で、突起27が密封部材41の
内周リップの外側を外周リップに向かって伸び外周リッ
プの前方側への変形量を規制している。第３部材30は、
第２部材20の突出部25の大径部25Aに密封部材42を嵌着
したのち、突出部25の小径部25Bに嵌合される。この嵌
合状態で、第３部材30は第２部材20との間に密封部材42
用の溝状空間Ｂを区画し、環状部32が密封部材42の内周
リップと外周リップとの間に向かって伸びている。The first member 10 and the second member 20 are connected to each other by the
The steps that fit into and abut the stepped recess 24 of the member 20 are joined to each other by welding means such as ultrasonic wave welding, and then the sealing member 41 is fitted. The empty space b adjacent to the step
Thus, the molten resin is prevented from flowing out of the concave portion 24. The third flange portion 22 of the second member 20 defines a groove-shaped space A for the sealing member 41 between the third flange portion 11 and the rear flange portion 11 of the first member 10, and in this connection state, the projection 27 is provided with the sealing member. The outer side of the inner lip 41 extends toward the outer lip to regulate the amount of deformation of the outer lip toward the front. The third member 30 is
After the sealing member 42 is fitted to the large diameter portion 25A of the protruding portion 25 of the second member 20, it is fitted to the small diameter portion 25B of the protruding portion 25. In this fitted state, the third member 30 and the second member 20 have a sealing member 42 therebetween.
The annular portion 32 extends between the inner peripheral lip and the outer peripheral lip of the sealing member 42.
なお、符号１で示す鎖線部分はマスタシリンダのシリ
ンダ本体を示し、ａは成形時のゲート部を示している。In addition, the chain line part shown by the code | symbol 1 shows the cylinder main body of a master cylinder, and a shows the gate part at the time of shaping | molding.
本実施例のピストンはシリンダ本体１のシリンダ孔２
内周との間に、液補給路３を通して図示しない作動液リ
ザーバに通じる液補給室４を区画し、シリンダ本体１の
底との間に、吐出口５が開口し、ゆるめ孔６を通して図
示しない作動液リザーバに通じる圧力室７を区画する。The piston of this embodiment is a cylinder bore 2 of a cylinder body 1.
A liquid replenishing chamber 4 communicating with a working fluid reservoir (not shown) through a liquid replenishing passage 3 is defined between the inner periphery and a fluid supply chamber 4. A pressure chamber 7 communicating with the hydraulic fluid reservoir is defined.
本実施例のピストンは、第１部材10と第２部材20を溶
着により結合して構成されるが、第２部材20が、その前
後部に前方のフランジ部21、第３のフランジ部22を有し
ているので、シリンダ孔２内を安定して良好に摺動す
る。そして第２部材20の第３のフランジ部22の外周面に
周方向所定間隔を隔てて軸方向に伸びる通路（溝）26を
設けてあるので、前記した空気抜き時、第３のフランジ
部22の後方の空間Ａ内の空気は、この通路26を通って液
補給室４へ容易に排気され、空気の残留は防がれる。The piston according to the present embodiment is configured by joining the first member 10 and the second member 20 by welding. The second member 20 includes a front flange portion 21 and a third flange portion 22 at the front and rear portions thereof. As a result, it slides in the cylinder hole 2 stably and satisfactorily. A passage (groove) 26 extending in the axial direction at a predetermined circumferential interval is provided on the outer peripheral surface of the third flange portion 22 of the second member 20. The air in the rear space A is easily exhausted to the liquid supply chamber 4 through the passage 26, and the air is prevented from remaining.
また、この通路26を第３のフランジ部22の外周面に軸
方向に伸びる溝として形成したので、通路を形成したの
で、通路を形成するためのピンを用いる必要がないた
め、樹脂成型時に樹脂の乱流やヒケを発生することがな
いので、第３のフランジ部22の摺動特性を低下させるこ
とがない。In addition, since the passage 26 is formed as a groove extending in the axial direction on the outer peripheral surface of the third flange portion 22, the passage is formed. Therefore, it is not necessary to use a pin for forming the passage. As a result, no turbulence or sink marks are generated, so that the sliding characteristics of the third flange portion 22 are not reduced.
本考案は以上説明した通り、１つの部材の前後部にそ
れぞれフランジ部を設けてあるので、良好なピストン摺
動特性を得ることができ、前方側の部材の後方に設けら
れてその端面が後方側密封部材に対向するフランジ部
に、前後を連絡する通路を設けたので、前後にフランジ
部を有する分割一体形のピストンではあるが、マスタシ
リンダの空気抜き時に、上記後方側密封部材が収納され
る空間に空気が残留するのを防止することができる。As described above, according to the present invention, a flange portion is provided on each of the front and rear portions of one member, so that good piston sliding characteristics can be obtained. Since the front and rear passages are provided in the flange portion facing the side sealing member, it is a split integral type piston having the front and rear flange portions, but the above-mentioned rear side sealing member is housed when air is released from the master cylinder. It is possible to prevent air from remaining in the space.
さらに、通路を溝として形成することにより、ピスト
ンの樹脂成型時に、通路を形成するピンを用いないの
で、樹脂に乱流やヒケが発生することがなく、良好な摺
動特性を得ることができる。Furthermore, since the passage is formed as a groove, a pin forming the passage is not used at the time of resin molding of the piston, so that turbulence and sink are not generated in the resin, and good sliding characteristics can be obtained. .
第１図は本考案の実施例を示す縦断面図、第２図は上記
実施例のＡ−Ａ断面図、第３図は上記実施例のＢ−Ｂ断
面図である。 10……第１部材、20……第２部材、21……前方のフラン
ジ部、11……後方のフランジ部、22……第３のフランジ
部、26……通路、41、42……密封部材。FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is an AA sectional view of the above embodiment, and FIG. 3 is a BB sectional view of the above embodiment. 10 first member, 20 second member, 21 front flange portion, 11 rear flange portion, 22 third flange portion, 26 passage, 41, 42 sealing. Element.
Claims (1)
と、このフランジ部の前方側に各々装着される密封部材
とを備え、後方側の密封部材よりも前方側を分割部とし
て２分された２部材を互いに結合して構成されるマスタ
シリンダ用樹脂ピストンにおいて、２部材のうち前方側
の部材に、後方側密封部材に接近して第３のフランジ部
を形成するとともに、この第３のフランジ部の外周に前
後を連通する通路を溝として形成したマスタシリンダ用
樹脂ピストン。A sealing member attached to a front portion of the flange portion; a front portion of the sealing member is divided into two parts; In the master cylinder resin piston formed by connecting the two members to each other, a third flange portion is formed on the front member of the two members close to the rear sealing member, and the third flange portion is formed. A resin piston for a master cylinder in which a passage communicating with the front and rear of the flange is formed as a groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990110244U JP2545061Y2 (en) | 1990-10-23 | 1990-10-23 | Resin piston for master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990110244U JP2545061Y2 (en) | 1990-10-23 | 1990-10-23 | Resin piston for master cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0469270U JPH0469270U (en) | 1992-06-18 |
| JP2545061Y2 true JP2545061Y2 (en) | 1997-08-25 |
Family
ID=31857552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990110244U Expired - Fee Related JP2545061Y2 (en) | 1990-10-23 | 1990-10-23 | Resin piston for master cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545061Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202061B (en) * | 2014-06-20 | 2019-11-01 | 舍弗勒技术股份两合公司 | Clutch slave cylinder, clutch release system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0224689U (en) * | 1988-08-01 | 1990-02-19 |
-
1990
- 1990-10-23 JP JP1990110244U patent/JP2545061Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0469270U (en) | 1992-06-18 |
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Free format text: JAPANESE INTERMEDIATE CODE: R350 |
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