JP2017114293A - Operating fluid reservoir - Google Patents

Operating fluid reservoir Download PDF

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Publication number
JP2017114293A
JP2017114293A JP2015251782A JP2015251782A JP2017114293A JP 2017114293 A JP2017114293 A JP 2017114293A JP 2015251782 A JP2015251782 A JP 2015251782A JP 2015251782 A JP2015251782 A JP 2015251782A JP 2017114293 A JP2017114293 A JP 2017114293A
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Prior art keywords
opening
protrusion
seal
main body
cap
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利博 中野
Toshihiro Nakano
利博 中野
淳 松島
Atsushi Matsushima
淳 松島
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Advics Co Ltd
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Advics Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an operating fluid reservoir which can reduce effect of dimensional deviation of a member without degrading assemblability of a reservoir with a simple structure.SOLUTION: An operating fluid reservoir includes: a tank main body 3; a cap main body 2; a seal support part 11 which is arranged on an inner side of the cap main body 2 and has a seal groove 10 in which an annular seal member 9 is pressed; and the seal member 9 which has a base part 9a pressed in the seal groove 10, a first projection part 9b abutting on an inner circumference surface of an opening part 4, and a second projection part 9c pressed by the opening part 4 between an end surface of the opening part 4 and the seal groove 10. When the cap main body 2 is locked on a flange part 5, an outer side end part in a diameter direction of an abutment part of the seal groove 10 and the base part 9a or the second projection part 9c is positioned on an axial center side of the tank main body 3 than an inner side end part in the diameter direction of the abutment part of the opening part 4 and the second projection part 9c.SELECTED DRAWING: Figure 1

Description

本発明は、車両用の作動液リザーバに関する。   The present invention relates to a hydraulic fluid reservoir for a vehicle.

この種の作動液リザーバは、例えば、下記特許文献1に記載されている。   This type of hydraulic fluid reservoir is described, for example, in Patent Document 1 below.

実登2525729号Noto 2525729

従来のこの種の作動液リザーバでは、特許文献1に開示されているように、キャップがリザーバ本体のフランジ部に係止されることにより装着されると、弾性部材であるパッキンがキャップ装着部の上端とシールキャップの外周との間に狭圧される。これにより、リザーバ本体1の内部は邪魔板の外周の隙間、2個のエアー孔、下部中空室、仕切板に形成した1個のエアー孔、上部中空室、キャップボディの頂壁とシールキャップの環状突起の隙間、およびキャップボディの側壁の内周に形成した切欠きにより構成されるブリーザ通路を介してのみ大気に連通し、作動液の油面の変動による内圧の変化を補償することができる。   In the conventional hydraulic fluid reservoir of this type, as disclosed in Patent Document 1, when the cap is mounted by being locked to the flange portion of the reservoir body, the packing that is an elastic member is attached to the cap mounting portion. Narrow pressure is applied between the upper end and the outer periphery of the seal cap. As a result, the inside of the reservoir body 1 has a gap on the outer periphery of the baffle plate, two air holes, a lower hollow chamber, a single air hole formed in the partition plate, an upper hollow chamber, the top wall of the cap body, and the seal cap. It can communicate with the atmosphere only through the gap between the annular protrusions and the breather passage formed by the notch formed in the inner periphery of the side wall of the cap body, and can compensate for changes in internal pressure due to fluctuations in the oil level of the hydraulic fluid .

しかしながら、特許文献1に記載の作動液リザーバでは、パッキンがキャップ装着部の上端とシールキャップの外周との間に狭圧された態様において、パッキンとキャップ装着部との当接部とパッキンとパッキン支持部との当接部が同一軸線上に位置している。   However, in the hydraulic fluid reservoir described in Patent Document 1, in a mode in which the packing is narrowly pressed between the upper end of the cap mounting portion and the outer periphery of the seal cap, the contact portion between the packing and the cap mounting portion, the packing, and the packing The contact part with the support part is located on the same axis.

このため、例えば、キャップボディの円形の頂部、パッキン支持部およびキャップ装着部の軸方向の寸法バラつきがパッキンの軸方向厚みより大きい場合、パッキンが変形可能な空間がないため各部材の寸法バラつきを緩和できず、キャップをリザーバ本体に装着することが困難となり、リザーバの組み付け性を低下させる虞がある。また、キャップをリザーバ本体に装着する際の押圧力によって部材を破損させる虞があり、これらの点において改良の余地がある。   For this reason, for example, when the axial dimension variation of the circular top of the cap body, the packing support part, and the cap mounting part is larger than the axial thickness of the packing, there is no space in which the packing can be deformed, so the dimension variation of each member It cannot be relieved, and it becomes difficult to attach the cap to the reservoir body, and there is a possibility that the assembling property of the reservoir is lowered. Further, there is a possibility that the member may be damaged by the pressing force when the cap is attached to the reservoir body, and there is room for improvement in these respects.

本発明は上記点に鑑みて、簡易な構成にてリザーバの組み付け性を低下させることなく、
部材の寸法バラつきの影響を低減することができる作動液リザーバを提供することを目的とする。
In view of the above points, the present invention has a simple configuration without reducing the assembly of the reservoir,
It is an object of the present invention to provide a hydraulic fluid reservoir capable of reducing the influence of dimensional variation of members.

上記目的を達成するために、請求項1に係る発明は、作動液を貯蔵する中空部を有し、当該中空部に作動液を注液するための開口部を有するタンク本体と、天蓋部と当該天蓋部の外周端から垂下する腕部からなり、前記開口部に装着され当該開口部を覆うキャップ本体と、キャップ本体の内側に配設され、開口部の内周面に当接し液密的に封止する環状のシール部材が圧入されるシール溝を有するシール支持部材と、シール部材は、シール溝に圧入される基部と、開口部の内周面に当接する第1突部と、開口部に押圧される第2突部とを有し、キャップ本体がフランジ部に係止された態様において、シール溝と基部または第2突部との当接部の径方向外側端部が、開口部と第2突部との当接部の径方向内側端部よりもタンク本体の軸心側に位置することを特徴とする。   In order to achieve the above object, the invention according to claim 1 includes a tank body having a hollow portion for storing the working fluid, an opening for pouring the working fluid into the hollow portion, a canopy portion, A cap body that is attached to the opening and covers the opening, and is arranged on the inner side of the cap body and is in contact with the inner peripheral surface of the opening and is liquid-tight. A seal support member having a seal groove into which an annular seal member to be sealed is inserted, a base portion press-fitted into the seal groove, a first protrusion abutting against an inner peripheral surface of the opening, and an opening In the aspect in which the cap body is locked to the flange portion, the radially outer end portion of the contact portion between the seal groove and the base portion or the second protrusion portion is opened. Is positioned closer to the axial center side of the tank body than the radially inner end of the abutting portion between the first and second protrusions Characterized in that it.

請求項1に係る発明によれば、キャップ本体がタンク本体に装着された態様において、シール溝と基部または第2突部との当接部および開口部と第2突部との当接部が同一軸線上に位置することを避けることができ、シール溝と第2突部との間に当該第2突部が屈曲可能な隙間を形成することができる。これにより、例えば、タンク本体の開口部やシール支持部材の軸方向の寸法バラつきがシール部材の第2突部の変形可能量よりも多い場合においても、シール部材の変形を許容する空間を有しているため各部材の寸法バラつきを緩和できる。これにより簡易な構成にてリザーバの組み付け性を低下させることなく、部材の寸法バラつきの影響を低減することができる。   According to the first aspect of the present invention, in the aspect in which the cap body is mounted on the tank body, the contact portion between the seal groove and the base portion or the second protrusion and the contact portion between the opening portion and the second protrusion are Positioning on the same axis can be avoided, and a gap in which the second protrusion can be bent can be formed between the seal groove and the second protrusion. As a result, for example, even when the dimension variation in the axial direction of the opening of the tank body or the seal support member is larger than the deformable amount of the second protrusion of the seal member, there is a space that allows deformation of the seal member. Therefore, the dimensional variation of each member can be reduced. Thereby, the influence of the dimensional variation of a member can be reduced, without reducing the assembly | attachment property of a reservoir by simple structure.

請求項2に係る発明は、第2突部は、シール部材の円周上の少なくとも一部に形成されていることを特徴とする。   The invention according to claim 2 is characterized in that the second protrusion is formed on at least a part of the circumference of the seal member.

請求項2に係る発明によれば、第2突部が屈曲する箇所を任意に設定できるため、キャップ本体をタンク本体に装着する際の節度感を調整することができる。さらに、例えば、第2突部がシール部材の全周に形成されている場合に比べて、シール部材に使用する部材量を少なくすることができる。これにより、シール部材のコストを低減できる。   According to the invention which concerns on Claim 2, since the location where the 2nd protrusion part bends can be set arbitrarily, the moderation feeling at the time of attaching a cap main body to a tank main body can be adjusted. Furthermore, for example, compared with the case where the 2nd protrusion is formed in the perimeter of a sealing member, the amount of members used for a sealing member can be decreased. Thereby, the cost of a sealing member can be reduced.

本発明の実施形態の作動液リザーバを示す図である。It is a figure which shows the hydraulic fluid reservoir of embodiment of this invention. 本発明の実施形態のキャップ本体を示す図である。It is a figure which shows the cap main body of embodiment of this invention.

以下、本発明の実施形態により具体的に説明するが、本発明はその趣旨を超えない限り、以下の実施形態によって限定されるものではない。   Hereinafter, the present invention will be described in detail by way of embodiments, but the present invention is not limited by the following embodiments unless it exceeds the gist of the present invention.

図1および図2を参照して、本発明の一実施形態である作動液リザーバについて以下に詳述する。   With reference to FIG. 1 and FIG. 2, the hydraulic fluid reservoir which is one Embodiment of this invention is explained in full detail below.

図1に示す作動液リザーバ1は、キャップ本体2がタンク本体3に組み付けられている態様における断面図を示し、図2はキャップ本体2のみの断面図を示す。   The hydraulic fluid reservoir 1 shown in FIG. 1 shows a cross-sectional view in a mode in which a cap main body 2 is assembled to a tank main body 3, and FIG.

図1に示すように、本実施形態の作動液リザーバ1は、作動液を貯蔵する中空部(図示省略)を有し、作動液を貯蔵するための開口部4が形成されたタンク本体3と、このタンク本体3の開口部4の端部に径方向外側に延びるフランジ部5に係止されることにより、タンク本体3に装着されるキャップ本体2からなる。   As shown in FIG. 1, the hydraulic fluid reservoir 1 of the present embodiment has a hollow portion (not shown) for storing hydraulic fluid, and a tank body 3 having an opening 4 for storing hydraulic fluid. The cap body 2 is attached to the tank body 3 by being engaged with the flange portion 5 extending radially outward at the end of the opening 4 of the tank body 3.

キャップ本体2は天蓋部7と腕部18とが連接されることによりなり、この腕部18の内周側面には、タンク本体3に向けて傾斜するテーパ面が形成されている。また、天蓋部7から所定の位置において、キャップ本体2の軸心の向けて延びるとともに後述するシール支持部材11の係合端部16が係止される係合部17が形成されている。このシール支持部材11の係合端部がキャップ本体2の係合部に係合することにより、シール支持部材11がキャップ本体2から脱落することを防止できる。   The cap body 2 is formed by connecting the canopy portion 7 and the arm portion 18, and a tapered surface inclined toward the tank body 3 is formed on the inner peripheral side surface of the arm portion 18. An engagement portion 17 is formed at a predetermined position from the canopy portion 7 and extends toward the axis of the cap body 2 and engages with an engagement end portion 16 of a seal support member 11 described later. Since the engagement end portion of the seal support member 11 is engaged with the engagement portion of the cap body 2, the seal support member 11 can be prevented from dropping from the cap body 2.

さらに、キャップ本体2の内側には、タンク本体3の開口部4の内周面に当接し液密的に封止するシール部材9が圧入される断面コの字状のシール溝10が形成されているシール支持部材11が配設されている。また、キャップ本体2の天蓋部7からリブ6bが延びている。このリブ6bの内側にシール支持部材11の連接部15を介して環状のリブ6aが形成されている。また、リブ6bの外側の位置にシール支持部材11から伸びるリブ6c,6dが形成されている。さらに、シール支持部材11のリブ6dの外側には、係合部17に係合する係合端部16が天蓋部7に沿って延びている。また、各リブ6a,6b,6c,6dには周方向の所定位置に空気連通路としてスリット8および連通路13b,13c,13e,13dが形成されている。   Furthermore, a U-shaped sealing groove 10 is formed inside the cap body 2 and into which a sealing member 9 that is in contact with the inner peripheral surface of the opening 4 of the tank body 3 and seals liquid-tightly is press-fitted. A seal support member 11 is disposed. A rib 6 b extends from the canopy portion 7 of the cap body 2. An annular rib 6a is formed inside the rib 6b via a connecting portion 15 of the seal support member 11. In addition, ribs 6c and 6d extending from the seal support member 11 are formed at positions outside the rib 6b. Further, an engagement end 16 that engages with the engagement portion 17 extends along the canopy portion 7 outside the rib 6 d of the seal support member 11. Each rib 6a, 6b, 6c, 6d is formed with a slit 8 and communication passages 13b, 13c, 13e, 13d as air communication passages at predetermined positions in the circumferential direction.

シール部材9は弾性部材からなり、基部9aから径方向外側に延びるとともに、タンク本体3の開口部4の内周面に当接することにより液密的にシールする第1突部9bおよび開口部4の天蓋部7側の端部に押圧されることにより天蓋部7側に向けて屈曲する第2突部9cを有する。   The seal member 9 is made of an elastic member, extends radially outward from the base portion 9a, and seals the first protrusion 9b and the opening 4 in a liquid-tight manner by contacting the inner peripheral surface of the opening 4 of the tank body 3. It has the 2nd protrusion part 9c bent toward the canopy part 7 side by being pressed by the edge part of the canopy part 7 side.

シール支持部材11の下端部には、タンク本体3の開口部4の内側に配設され、開口部4の内周面付近まで延びている天蓋部形状の跳ね返し板12が連設されている。   At the lower end portion of the seal support member 11, a bounce plate 12 having a canopy shape that is disposed inside the opening 4 of the tank body 3 and extends to the vicinity of the inner peripheral surface of the opening 4 is continuously provided.

さらに、シール支持部材11には、タンク本体3の内部と外部とを連通する連通孔13a,13b,13c,13e,13dが形成されている。タンク本体3内部はこれらの連通孔13a,13b,13c,13e,13dを介して大気と連通可能となっている。   Furthermore, communication holes 13a, 13b, 13c, 13e, and 13d are formed in the seal support member 11 to communicate the inside and the outside of the tank body 3. The inside of the tank body 3 can communicate with the atmosphere through these communication holes 13a, 13b, 13c, 13e, and 13d.

上記の構成により、例えば、タンク本体3に貯蔵されている作動液が車両の振動によりキャップ本体2側に跳ねた場合、跳ね返し板12によって作動液がキャップ本体2の内側に侵入することを低減できる。また、作動液がキャップ本体2の内側に入った場合には、作動液がキャップ本体2およびシール支持部材11のリブ6a,6b,6c,6dによって連通孔13b,13cから作動液リザーバ1の外側に漏れ出すことを低減できる。   With the above configuration, for example, when the hydraulic fluid stored in the tank main body 3 jumps to the cap main body 2 side due to the vibration of the vehicle, the splashing plate 12 can reduce the intrusion of the hydraulic fluid into the cap main body 2. . Further, when the hydraulic fluid enters the inside of the cap body 2, the hydraulic fluid is outside the hydraulic fluid reservoir 1 from the communication holes 13 b and 13 c through the cap body 2 and the ribs 6 a, 6 b, 6 c, and 6 d of the seal support member 11. Leakage can be reduced.

なお、図2に示すように、キャップ本体2がタンク本体3に組み付けられていない態様においては、シール部材9の第2突部9cは、シール部材9の軸線に対して略垂直方向に向けて延びるように形成されている。   As shown in FIG. 2, in a mode in which the cap main body 2 is not assembled to the tank main body 3, the second protrusion 9 c of the seal member 9 is directed substantially perpendicular to the axis of the seal member 9. It is formed to extend.

また、シール溝10の天蓋部側の上面には、開口部4の軸心に向けて傾斜するテーパ面14aが形成されている。このテーパ面14aを形成することによって、シール溝10の天蓋部7側の上面と基部9aとの当接部の径方向外側端部が、開口部4の天蓋部7側端面と第2突部9cとの当接部の径方向内側端部より、所定の長さAだけタンク本体3の軸心側に位置するようにしている。   In addition, a tapered surface 14 a that is inclined toward the axis of the opening 4 is formed on the top surface of the seal groove 10 on the canopy side. By forming the tapered surface 14a, the radially outer end of the contact portion between the top surface of the seal groove 10 on the canopy 7 side and the base portion 9a is the end surface of the opening 4 on the canopy 7 side and the second protrusion. A predetermined length A is positioned on the axial center side of the tank body 3 from the radially inner end of the contact portion with 9c.

上記した構成からなる作動液リザーバ1は、キャップ本体2がタンク本体3に装着された態様において、シール溝10と基部9aまたは第2突部9cとの当接部および開口部4と第2突部9cとの当接部が同一軸線上に位置することを避けることができ、シール溝10と第2突部9cとの間に当該第2突部9cが屈曲可能な隙間を形成することができる。   The hydraulic fluid reservoir 1 having the above-described configuration has the contact portion between the seal groove 10 and the base portion 9a or the second protrusion portion 9c and the opening portion 4 and the second protrusion portion in the aspect in which the cap body 2 is mounted on the tank body 3. The contact portion with the portion 9c can be prevented from being located on the same axis, and a gap in which the second protrusion 9c can be bent is formed between the seal groove 10 and the second protrusion 9c. it can.

これにより、例えば、タンク本体2の開口部4やシール支持部材11の軸方向の寸法バラつきがシール部材9の第2突部9cの変形可能量よりも多い場合においても、シール部材9の変形を許容する空間を有しているため各部材の寸法バラつきを緩和できる。これにより。簡易な構成にてリザーバの組み付け性を低下させることなく、部材の寸法バラつきの影響を低減することができる。   Thereby, for example, even when the axial dimensional variation of the opening 4 of the tank body 2 and the seal support member 11 is larger than the deformable amount of the second protrusion 9c of the seal member 9, the seal member 9 is deformed. Since it has the space to allow, the dimensional variation of each member can be eased. By this. The influence of the dimensional variation of the members can be reduced without reducing the assembling property of the reservoir with a simple configuration.

なお、第2突部9cは、シール部材9の少なくとも一部に形成されていてもよい。これにより、第2突部9cがシール部材9の円周上の全周に形成されている場合に比べて、第2突部9cが屈曲する箇所を任意に設定できるため、キャップ本体2をタンク本体3に装着する際の節度感を調整することができる。さらに、例えば、第2突部9cがシール部材9の全周に形成されている場合に比べて、シール部材9に使用する部材量を少なくすることができる。これにより、シール部材9のコストを低減できる。   The second protrusion 9c may be formed on at least a part of the seal member 9. Thereby, compared with the case where the 2nd protrusion part 9c is formed in the perimeter of the circumference of the sealing member 9, since the location where the 2nd protrusion part 9c bends can be set arbitrarily, the cap main body 2 is made into a tank. It is possible to adjust a feeling of moderation when the main body 3 is attached. Furthermore, for example, compared with the case where the 2nd protrusion 9c is formed in the perimeter of the sealing member 9, the amount of members used for the sealing member 9 can be decreased. Thereby, the cost of the sealing member 9 can be reduced.

また、本実施形態では、シール溝10の天蓋部7側の上面と基部9aとの当接部の径方向外側端部が、開口部4の天蓋部7側端面と第2突部9cとの当接部の径方向内側端部より、所定の長さAだけタンク本体3の軸心側に位置するようにしたが、シール溝10の天蓋部7側の上面と第2突部9cとの当接部の径方向外側端部が、開口部4の天蓋部7側端面と第2突部9cとの当接部の径方向内側端部より、所定の長さAだけタンク本体3の軸心側に位置するようにしてもよい。   In the present embodiment, the radially outer end of the contact portion between the top surface of the seal groove 10 on the canopy 7 side and the base 9a is the end surface of the opening 4 on the canopy 7 side and the second protrusion 9c. A predetermined length A is positioned on the axial center side of the tank body 3 from the radially inner end of the contact portion, but the top surface of the seal groove 10 on the canopy 7 side and the second protrusion 9c. The axially outer end of the abutting portion has a predetermined length A from the radially inner end of the abutting portion between the end surface of the opening 4 on the canopy 7 side and the second protrusion 9c. It may be located on the mind side.

また、図1および図2に示すように、連接部15に開口部4の軸心に向けて傾斜するテーパ面14bを形成してもよい。これにより、例えば、作動液がキャップ本体2の内側に入ってきた場合、テーパ面14bのより好適にタンク本体3側に作動液を排出することができる。   Further, as shown in FIGS. 1 and 2, a tapered surface 14 b that is inclined toward the axis of the opening 4 may be formed in the connecting portion 15. Thereby, for example, when the hydraulic fluid enters the inside of the cap body 2, the hydraulic fluid can be discharged to the tank body 3 side more suitably on the tapered surface 14b.

また、図1および図2に示すように、天蓋部7上面におけるリブ6bとリブ6cとの間にキャップ本体2の径方向外側に向けて傾斜するテーパ面14cを形成してもよい。これにより、例えば、作動液がキャップ本体2の内側に入った状態でキャップ本体2をタンク本体3から取り外し、キャップ本体2の内側を上側にした場合、テーパ面14cにより、作動液をキャップ本体2の中心側に集めることができる。これにより、キャップ本体2をタンク本体3組み付けた際に、好適にタンク本体3側に作動液を排出することができる。   Further, as shown in FIGS. 1 and 2, a tapered surface 14 c that is inclined toward the radially outer side of the cap body 2 may be formed between the rib 6 b and the rib 6 c on the top surface of the canopy portion 7. Thereby, for example, when the cap main body 2 is removed from the tank main body 3 in a state where the hydraulic fluid enters the inside of the cap main body 2 and the inner side of the cap main body 2 is set to the upper side, the hydraulic fluid is removed from the cap main body 2 by the tapered surface 14c. Can be collected on the center side of. Thereby, when the cap main body 2 is assembled | attached to the tank main body 3, a hydraulic fluid can be suitably discharged | emitted to the tank main body 3 side.

以上、本発明の実施形態が例示されたが、上記実施形態はあくまで一例であって、発明の範囲を限定することは意図していない。上記実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、組み合わせ、変更を行うことができる。   As mentioned above, although embodiment of this invention was illustrated, the said embodiment is an example to the last, Comprising: It is not intending limiting the range of invention. The above embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention.

1:作動液リザーバ、2:キャップ本体、3:タンク本体、4:開口部、5:フランジ部、6a6b,6c,6d,:リブ、7:天蓋部、8:スリット、9:シール部材、9a:基部、9b:第1突部、9c:第2突部、10:シール溝、11:シール支持部材、12:跳ね返し板、13a,13b,13c, 13d, 13e:連通孔、14a,14b,14c:テーパ面、15:連接部、16:係合端部、17:係合部、18:腕部
1: hydraulic fluid reservoir, 2: cap body, 3: tank body, 4: opening, 5: flange, 6a6b, 6c, 6d ,: rib, 7: canopy, 8: slit, 9: seal member, 9a : Base, 9b: first protrusion, 9c: second protrusion, 10: seal groove, 11: seal support member, 12: bounce plate, 13a, 13b, 13c, 13d, 13e: communication hole, 14a, 14b, 14c: taper surface, 15: connecting portion, 16: engagement end portion, 17: engagement portion, 18: arm portion

Claims (2)

作動液を貯蔵する中空部および当該中空部に前記作動液を注液するための開口部を有するタンク本体と、
天蓋部と当該天蓋部の外周端から垂下する腕部からなり、前記開口部に装着され当該開口部を覆うキャップ本体と、
前記キャップ本体の内側に配設され、前記開口部の内周面に当接し液密的に封止する環状のシール部材が圧入されるシール溝を有するシール支持部材と、
前記シール部材は、前記シール溝に圧入される基部と、前記開口部の内周面に当接する第1突部と、前記開口部の端面に押圧される第2突部とを有し、
前記キャップ本体が前記フランジ部に係止された態様において、前記シール溝と前記基部または前記第2突部との当接部の径方向外側端部が、前記開口部と前記第2突部との当接部の径方向内側端部よりも前記タンク本体の軸心側に位置することを特徴とする作動液リザーバ。
A tank body having a hollow portion for storing the working fluid and an opening for pouring the working fluid into the hollow portion;
A cap body comprising a canopy portion and an arm portion hanging from the outer peripheral end of the canopy portion, and is attached to the opening portion and covers the opening portion;
A seal support member that is disposed inside the cap body and has a seal groove into which an annular seal member that comes into contact with the inner peripheral surface of the opening and seals in a liquid-tight manner is press-fitted;
The seal member includes a base that is press-fitted into the seal groove, a first protrusion that contacts the inner peripheral surface of the opening, and a second protrusion that is pressed against an end surface of the opening.
In an aspect in which the cap main body is locked to the flange portion, a radially outer end portion of a contact portion between the seal groove and the base portion or the second protrusion portion is the opening portion and the second protrusion portion. The hydraulic fluid reservoir is located closer to the axial center side of the tank body than the radially inner end of the contact portion.
前記第2突部は、前記シール部材の円周上の少なくとも一部に形成されていることを特徴とする請求項1に記載の作動液リザーバ。
The hydraulic fluid reservoir according to claim 1, wherein the second protrusion is formed on at least a part of a circumference of the seal member.
JP2015251782A 2015-12-24 2015-12-24 Operating fluid reservoir Pending JP2017114293A (en)

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