JP2010270833A - Sealing device - Google Patents

Sealing device Download PDF

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JP2010270833A
JP2010270833A JP2009123348A JP2009123348A JP2010270833A JP 2010270833 A JP2010270833 A JP 2010270833A JP 2009123348 A JP2009123348 A JP 2009123348A JP 2009123348 A JP2009123348 A JP 2009123348A JP 2010270833 A JP2010270833 A JP 2010270833A
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peripheral end
annular member
outer peripheral
annular
seal lip
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JP5346240B2 (en
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Masanori Kameoka
政則 亀岡
Tomohiro Usami
智大 宇佐美
Daisuke Kasai
大輔 笠井
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Koyo Sealing Techno Co Ltd
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Koyo Sealing Techno Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/06—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch
    • F16D25/062—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces
    • F16D25/063—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially
    • F16D25/0635—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs
    • F16D25/0638—Fluid-actuated clutches in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch the clutch having friction surfaces with clutch members exclusively moving axially with flat friction surfaces, e.g. discs with more than two discs, e.g. multiple lamellae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device effectively preventing peeling of inner circumferential-side and outer circumferential-side seal lips with the lapse of time while suppressing the cost of surface treatment. <P>SOLUTION: The sealing device includes a piston seal-side annular member 12 made of aluminum die casting and facing a cancel plate 2, and inner circumferential-side and outer circumferential-side seal lips 15 and 13 adhered respectively to an inner circumferential end portion 14 and an outer circumferential end portion 11 of the piston seal side annular member 12. The inner circumferential end portion 14 and the outer circumferential end portion 11 include annular groove parts 44 and 38. When the seal lips 15 and 13 are cure-adhered to the inner circumferential end portion 14 and the outer circumferential end portion 11, an unvulcanized rubber material is filled in the groove parts 44 and 38 to extend the adhesion areas of both the seal lips 15 and 13 in the depth direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、自動車等の自動変速機（ＡＴ）に用いられ、軸方向に摺動可能なピストンシールを備えた密封装置に関するものである。   The present invention relates to a sealing device that is used in an automatic transmission (AT) of an automobile or the like and includes a piston seal that can slide in the axial direction.

例えば自動車等の自動変速機の動力接続部には、流体圧力によりハウジング内を軸方向へ移動して多板クラッチを押圧する環状のピストンシールと、このピストンシールの軸方向一方側に当該ピストンシールと同軸心状に配置された環状のキャンセルプレートとを備えた密封装置が組み込まれている（例えば、特許文献１参照）。前記ピストンシールは、キャンセルプレートと対向する金属製の環状部材と、この環状部材と前記ハウジングとの間をシールするために前記環状部材の内周端部および外周端部にそれぞれ接着されたシールリップとを有している。   For example, in a power connection part of an automatic transmission such as an automobile, an annular piston seal that moves axially in a housing by fluid pressure to press a multi-plate clutch, and the piston seal on one side of the piston seal in the axial direction And an annular cancel plate arranged coaxially are incorporated (see, for example, Patent Document 1). The piston seal includes a metal annular member facing the cancel plate, and a seal lip bonded to the inner peripheral end and the outer peripheral end of the annular member to seal between the annular member and the housing. And have.

また、前記ピストンシールにアルミダイキャスト製の環状部材を用い、密封装置の大幅な軽量化を図るようにしたものもある（例えば、特許文献２参照）。
なお、特許文献２のものでは、シールリップの接着部分を、ハウジングとの間で形成される圧力室に臨む受圧側面からその内周面および外周面を経て前記受圧側面と反対側を向いた面まで被覆するように皮膜状に形成し、これによって、アルミダイキャスト製の環状部材とシールリップの接着部分との互いの接着面積を拡大して、アルミダイキャスト製の環状部材とゴム素材との間での加硫接着による相性の不適を補うようにしている。 Also, there is a piston seal that uses an annular member made of aluminum die cast so as to greatly reduce the weight of the sealing device (see, for example, Patent Document 2).
Note that in Patent Document 2, the adhesion portion of the seal lip is directed from the pressure receiving side facing the pressure chamber formed between the housing and the opposite side of the pressure receiving side through the inner and outer peripheral surfaces. It is formed in a film shape so as to cover up to this, thereby expanding the mutual bonding area between the aluminum die cast annular member and the adhesive part of the seal lip, and the aluminum die cast annular member and the rubber material It is intended to compensate for incompatibility due to vulcanization adhesion between the two.

特開２００８−４５７１３号公報JP 2008-45713 A 特開２００８−２８１０９０号公報JP 2008-281090 A

前記アルミダイキャスト製の環状部材にシールリップを接着する場合には、環状部材に表面処理（接着材塗装）を施す必要があるが、その表面処理にはばらつきが生じ易い。これは、環状部材の圧力室に臨む受圧側面からその内周面および外周面を経て前記受圧側面と反対側を向いた面まで広範囲に亘って表面処理、つまり接着材を塗らなければならないが、広範囲に亘って接着材を均一に塗るのが難しく、接着材の塗りむら等が生じ易いからである。そのため、表面処理にばらつきがあると、アルミダイキャスト製の環状部材とゴム素材との互いの相性の不適とも相俟って接着力の低下が否めず、たとえシールリップの接着部分の接着面積を環状部材の広範囲に亘って拡大させても経時的に剥がれが生じ易いものとなる。
しかも、前述の如く広範囲に亘って表面処理を行うと、その表面処理にかかる工数、費用が多大なものとなり、表面処理のコストが嵩むことになる。 When the seal lip is bonded to the aluminum die-cast annular member, it is necessary to subject the annular member to surface treatment (adhesive coating), but the surface treatment tends to vary. This is a surface treatment over a wide range from the pressure-receiving side facing the pressure chamber of the annular member to the side facing the pressure-receiving side through its inner and outer peripheral surfaces, that is, an adhesive must be applied, This is because it is difficult to uniformly apply the adhesive over a wide range, and uneven coating of the adhesive tends to occur. For this reason, if there is variation in the surface treatment, the adhesive strength of the annular die member made of aluminum die cast and the rubber material is incompatible with each other. Even if the annular member is enlarged over a wide range, it tends to peel off over time.
In addition, if the surface treatment is performed over a wide range as described above, the man-hour and cost for the surface treatment become great, and the cost of the surface treatment increases.

本発明は、かかる点に鑑みてなされたものであり、アルミダイキャスト製の環状部材の内周端部および外周端部でのシールリップの経時的な剥がれを効果的に防止することができるとともに、表面処理のコストを抑えることができる密封装置を提供することを目的とする。   The present invention has been made in view of this point, and can effectively prevent the seal lip from peeling off over time at the inner peripheral end and the outer peripheral end of the aluminum die-cast annular member. An object of the present invention is to provide a sealing device capable of suppressing the cost of surface treatment.

前記目的を達成するため、本発明では、流体圧力によりハウジング内を軸方向一方側へ移動して多板クラッチを押圧する環状のピストンシールと、このピストンシールの軸線方向一方側に当該ピストンシールと同軸心状に配置された環状のキャンセルプレートとを備えた密封装置であって、前記ピストンシールは、前記キャンセルプレートと対向するアルミダイキャスト製の環状部材と、この環状部材と前記ハウジングとの間をシールするために前環状部材の内周端部および外周端部に接着されたシールリップとを有し、前記環状部材の内周端部および外周端部はそれぞれ環状の溝部を有し、前記環状部材の内周端部および外周端部のシールリップは、当該内周端部および外周端部の溝部の深さ方向にそれぞれ充填される充填片を有することを特徴としている。
前記構成の密封装置では、シールリップを環状部材の内周端部および外周端部に接着する際に、環状部材の内周端部および外周端部の環状の溝部の深さ方向にそれぞれ充填された充填片によって、当該内周端部および外周端部のシールリップの接着面積が深さ方向に拡大される。このため、シールリップが環状部材の内周端部および外周端部といった限定された部位においてのみ接着されていても、当該部位において接着面積を深さ方向に拡大したシールリップの接着力が十分に高められる。これにより、アルミダイキャスト製の環状部材の内周端部および外周端部でのシールリップの経時的な剥がれを効果的に防止することが可能となる。
しかも、表面処理が環状部材の内周端部および外周端部においてのみ行われることになり、環状部材の圧力室に臨む受圧側面からその内周面および外周面を経て前記受圧側面と反対側を向いた面まで広範囲に亘って表面処理を行っていたものに比して、表面処理にかかる工数、費用が削減され、表面処理のコストを抑えることが可能となる。 In order to achieve the above-mentioned object, in the present invention, an annular piston seal that moves in the housing to one side in the axial direction by fluid pressure to press the multi-plate clutch, and the piston seal on one side in the axial direction of the piston seal, A sealing device comprising an annular cancel plate arranged coaxially, wherein the piston seal is an aluminum die-cast annular member facing the cancel plate, and between the annular member and the housing. A seal lip bonded to an inner peripheral end and an outer peripheral end of the front annular member, and each of the inner peripheral end and the outer peripheral end of the annular member has an annular groove, The seal lips at the inner peripheral end and the outer peripheral end of the annular member have filling pieces that are filled in the depth direction of the groove at the inner peripheral end and the outer peripheral end, respectively. It is characterized.
In the sealing device having the above configuration, when the seal lip is bonded to the inner peripheral end and the outer peripheral end of the annular member, the seal lip is filled in the depth direction of the annular groove at the inner peripheral end and the outer peripheral end of the annular member. By the filled pieces, the adhesion area of the seal lips at the inner peripheral end and the outer peripheral end is expanded in the depth direction. For this reason, even if the seal lip is bonded only at a limited portion such as the inner peripheral end and the outer peripheral end of the annular member, the adhesive force of the seal lip with the bonding area expanded in the depth direction at the corresponding portion is sufficient. Enhanced. As a result, it is possible to effectively prevent the seal lip from peeling off with time at the inner peripheral end and the outer peripheral end of the aluminum die-cast annular member.
In addition, the surface treatment is performed only at the inner peripheral end and the outer peripheral end of the annular member, and the opposite side of the pressure receiving side from the pressure receiving side facing the pressure chamber of the annular member through the inner peripheral surface and the outer peripheral surface. Compared to the case where the surface treatment is performed over a wide range up to the facing surface, the man-hour and cost for the surface treatment are reduced, and the cost of the surface treatment can be suppressed.

また、前記環状部材の内周端部および外周端部のシールリップは、未加硫のゴム素材を前記環状部材の内周端部および外周端部にそれぞれ加硫接着することにより、前記充填片を当該内周端部および外周端部のシールリップの構成部分として一体成形したものであることが好ましい。
この場合、未加硫のゴム素材を前記環状部材の内周端部および外周端部にそれぞれ加硫接着した際に充填片が内周端部および外周端部のシールリップの構成部分として一体成形されるので、シールリップに予め一体成形された充填片を環状部材の内周端部および外周端部の溝部に押し込んで充填することにより当該内周端部および外周端部に接着していたものに比して、シールリップを環状部材の内周端部および外周端部に簡単に接着することができる。 Further, the sealing lip of the inner peripheral end and the outer peripheral end of the annular member is obtained by vulcanizing and bonding an unvulcanized rubber material to the inner peripheral end and the outer peripheral end of the annular member, respectively. Is preferably integrally molded as a constituent part of the seal lip of the inner peripheral end and the outer peripheral end.
In this case, when the unvulcanized rubber material is vulcanized and bonded to the inner peripheral end and the outer peripheral end of the annular member, the filling piece is integrally formed as a constituent part of the seal lip at the inner peripheral end and the outer peripheral end. Therefore, the filler piece, which was integrally formed with the seal lip in advance, was pressed into the groove portions of the inner peripheral end portion and the outer peripheral end portion of the annular member to be filled and adhered to the inner peripheral end portion and the outer peripheral end portion. Compared to the above, the seal lip can be easily bonded to the inner peripheral end and the outer peripheral end of the annular member.

また、前記外周端部の溝部は、当該溝部よりもさらに深い複数の凹部を周方向所定間隔おきに有していることが好ましい。
この場合、シールリップを環状部材の外周端部に接着する際に、充填片が外周端部の溝部よりもさらに深い凹部の内部にも充填され、シールリップの接着面積が深さ方向へさらに拡大される。これにより、環状部材の外周端部でのシールリップの接着力が大幅に高められ、外周端部のシールリップの経時的な剥がれをより効果的に防止することが可能となる。
しかも、凹部を溝部の周方向所定間隔おきに有していることにより、環状部材の外周端部での剛性を凹部によって低下させることなく円滑に確保され、環状部材の外周端部での変形等を効果的に防止することが可能となる。 Moreover, it is preferable that the groove part of the said outer peripheral end part has several recessed parts deeper than the said groove part for every circumferential direction predetermined space | interval.
In this case, when the seal lip is bonded to the outer peripheral end portion of the annular member, the filling piece is also filled into the recessed portion deeper than the groove portion of the outer peripheral end portion, and the adhesive area of the seal lip is further expanded in the depth direction. Is done. Thereby, the adhesive force of the seal lip at the outer peripheral end portion of the annular member is greatly increased, and it becomes possible to more effectively prevent the seal lip at the outer peripheral end portion from peeling with time.
In addition, by having the recesses at predetermined intervals in the circumferential direction of the groove, the rigidity at the outer peripheral end of the annular member can be ensured smoothly without being reduced by the recess, and deformation at the outer peripheral end of the annular member, etc. Can be effectively prevented.

また、前記環状部材の外周端部のシールリップは、前記環状部材の外周端部から径方向内方側に亘って接着され、そのシールリップの径方向内方側に対応する前記環状部材の対応部位は環状の溝部を有し、この環状部材の対応部位の溝部および前記外周端部の溝部の深さ方向が、当該各溝部に充填された充填片の先端部同士を互いに向き合わせるように斜め方向向きとなっていることが好ましい。
この場合、シールリップを環状部材の外周端部から径方向内方側に亘って接着する際に、環状部材の対応部位の溝部および外周端部の溝部にそれぞれ充填された充填片は、それぞれの先端部同士を各溝部の底部で互いに向き合わせているために溝部から抜け難くなっている。これにより、外周端部でのシールリップの接着力がより一層高められることになり、外周端部のシールリップの経時的な剥がれをさらに効果的に防止することが可能となる。 Further, the seal lip at the outer peripheral end of the annular member is bonded from the outer peripheral end of the annular member to the radially inner side, and the annular member corresponding to the radially inner side of the seal lip corresponds to the seal lip. The part has an annular groove part, and the depth direction of the groove part of the corresponding part of the annular member and the groove part of the outer peripheral end part is slanted so that the tip parts of the filling pieces filled in the respective groove parts face each other. The direction is preferred.
In this case, when the seal lip is bonded from the outer peripheral end of the annular member to the radially inward side, the filling pieces respectively filled in the groove portion of the corresponding portion of the annular member and the groove portion of the outer peripheral end are respectively Since the front end portions face each other at the bottom of each groove portion, it is difficult to come out from the groove portion. Thereby, the adhesive force of the seal lip at the outer peripheral end portion is further increased, and it becomes possible to more effectively prevent the seal lip at the outer peripheral end portion from peeling with time.

また、前記環状部材の内周端部における溝部の縦壁は、当該縦壁を軸方向に貫通する複数の貫通孔を周方向所定間隔おきに有し、前記環状部材の内周端部のシールリップは、前記充填片を用いて前記溝部の縦壁をその軸方向両側から挟み込むように当該縦壁の軸方向反溝部側に接着される環状鍔部と、前記各貫通孔に充填された状態で前記充填片と前記環状鍔部とを軸方向に一体に繋ぐ充填部とを有することが好ましい。
この場合、環状部材の内周端部における溝部の縦壁を軸方向両側から挟み込んで接着する充填片と環状鍔部とが、環状部材の内周端部の各貫通孔に充填された充填部によって軸方向に一体に繋がっているので、充填片と環状鍔部とが各貫通孔の充填部によって環状部材の内周端部に弾性的に繋がれた状態となり、環状部材の内周端部に対する充填片および環状鍔部の接着力が効果的に向上する。このため、表面処理にばらつきのある環状部材の内周端部にシールリップを接着しても、充填片および環状鍔部の接着力が各貫通孔の充填部によって弾性的にアシストされて十分に高められ、シールリップに経時的に剥がれが生じることがない。 In addition, the vertical wall of the groove portion at the inner peripheral end of the annular member has a plurality of through holes that penetrate the vertical wall in the axial direction at predetermined intervals in the circumferential direction, and seals the inner peripheral end of the annular member. The lip is filled in each through-hole and an annular flange that is bonded to the axially opposite groove side of the vertical wall so as to sandwich the vertical wall of the groove from both sides in the axial direction using the filling piece It is preferable to have a filling part that integrally connects the filling piece and the annular flange part in the axial direction.
In this case, the filling portion in which the filling piece and the annular flange portion sandwiching and bonding the vertical wall of the groove portion at the inner peripheral end portion of the annular member from both sides in the axial direction are filled in the respective through holes in the inner peripheral end portion of the annular member. Since the filling piece and the annular flange portion are elastically connected to the inner peripheral end portion of the annular member by the filling portion of each through hole, the inner peripheral end portion of the annular member The adhesive force of the filling piece and the annular flange with respect to is effectively improved. For this reason, even if the seal lip is bonded to the inner peripheral end of the annular member having a variation in the surface treatment, the adhesive force between the filling piece and the annular flange is elastically assisted by the filling portion of each through-hole. The seal lip does not peel off over time.

また、前記環状部材の内周端部のシールリップは、未加硫のゴム素材を前記環状部材の内周端部に加硫接着することにより、前記充填片と前記環状鍔部と前記充填部とを当該シールリップの構成部分として一体成形したものであることが好ましい。
この場合、充填片および環状鍔部と充填部とがシールリップの構成部分として一体成形されるので、充填片および環状鍔部に対し充填部とが一体成形されずに別途接着材等により接着されて充填片と環状鍔部とを軸方向に一体に繋ぐようにしたものに比して、簡単かつ安価にシールリップを環状部材の内周端部に接着することができる。 Further, the seal lip of the inner peripheral end of the annular member is formed by vulcanizing and bonding an unvulcanized rubber material to the inner peripheral end of the annular member, so that the filling piece, the annular flange, and the filling portion Are preferably integrally formed as a constituent part of the seal lip.
In this case, since the filling piece and the annular flange portion and the filling portion are integrally formed as a component part of the seal lip, the filling portion and the filling portion are not integrally formed with the filling piece and the annular flange portion but are separately bonded by an adhesive or the like. Thus, the seal lip can be bonded to the inner peripheral end of the annular member easily and at a lower cost than that in which the filling piece and the annular flange are integrally connected in the axial direction.

更に、前記キャンセルプレートは、アルミダイキャスト製のプレート側環状部材と、このプレート側環状部材と前記ピストンシールとの間をシールするために前記プレート側環状部材の外周端部に接着されたプレート側シールリップとを有し、前記プレート側環状部材の外周端部は、その外周端部を軸方向に貫通する複数の貫通孔を周方向所定間隔おきに有し、前記プレート側シールリップは、前記プレート側環状部材の外周端部を軸方向両側から挟み込む一対の環状鍔部と、前記各貫通孔に充填された状態で前記両環状鍔部同士を軸方向に一体に繋ぐ充填部とを有することが好ましい。
この場合、プレート側環状部材の外周端部を軸方向両側から挟み込んで接着する一対の環状鍔部同士が、プレート側環状部材の外周端部の各貫通孔に充填された充填部によって軸方向に一体に繋がっているので、両環状鍔部が各貫通孔の充填部によってプレート側環状部材の外周端部に弾性的に繋がれた状態となり、プレート側環状部材の外周端部に対する両環状鍔部の接着力が効果的に向上する。このため、表面処理にばらつきのあるプレート側環状部材の外周端部にプレート側シールリップを接着しても、両環状鍔部の接着力が各貫通孔の充填部によってアシストされて十分に高められ、プレート側シールリップに経時的に剥がれが生じるのを抑制することができる。 Further, the cancel plate includes a plate-side annular member made of aluminum die cast, and a plate side bonded to an outer peripheral end of the plate-side annular member to seal between the plate-side annular member and the piston seal. A seal lip, and the outer peripheral end of the plate-side annular member has a plurality of through-holes penetrating the outer peripheral end in the axial direction at predetermined intervals in the circumferential direction. A pair of annular flanges that sandwich the outer peripheral end of the plate-side annular member from both sides in the axial direction, and a filling part that integrally connects the two annular flanges in the axial direction in a state of being filled in the through holes. Is preferred.
In this case, a pair of annular flanges that sandwich and bond the outer peripheral end of the plate-side annular member from both sides in the axial direction are axially filled by the filling portions filled in the respective through holes in the outer peripheral end of the plate-side annular member. Since they are integrally connected, both annular flanges are elastically connected to the outer peripheral end of the plate-side annular member by the filling portions of the respective through holes, and both annular flanges with respect to the outer peripheral end of the plate-side annular member Effectively improves the adhesive strength. For this reason, even if the plate-side seal lip is bonded to the outer peripheral end of the plate-side annular member having a variation in surface treatment, the adhesive force of both annular flanges is assisted by the filling portion of each through-hole and sufficiently increased. Further, it is possible to suppress the peeling of the plate-side seal lip over time.

また、前記プレート側シールリップは、未加硫のゴム素材を前記プレート側環状部材の外周端部に加硫接着することにより、前記一対の環状鍔部と前記充填部とを当該プレート側シールリップの構成部分として一体成形したものであることが好ましい。
この場合、一対の環状鍔部と充填部とがプレート側シールリップの構成部分として一体成形されるので、一対の環状鍔部に対し充填部が一体成形されずに別途接着材等により接着されて両環状鍔部同士を軸方向に一体に繋ぐようにしたものに比して、簡単かつ安価にプレート側シールリップをプレート側環状部材の外周端部に接着することができる。 The plate-side seal lip is formed by vulcanizing and bonding an unvulcanized rubber material to the outer peripheral end of the plate-side annular member, thereby connecting the pair of annular flanges and the filling portion to the plate-side seal lip. It is preferable that they are integrally molded as the constituent parts.
In this case, since the pair of annular flanges and the filling part are integrally formed as a component part of the plate-side seal lip, the filling part is not integrally formed with the pair of annular flanges but is separately bonded with an adhesive or the like. The plate-side seal lip can be bonded to the outer peripheral end portion of the plate-side annular member easily and at a lower cost than that in which both the annular flanges are integrally connected in the axial direction.

本発明の密封装置によれば、アルミダイキャスト製の環状部材の内周端部および外周端部でのシールリップの接着力を十分に高めて、シールリップの経時的な剥がれを効果的に防止することができるとともに、表面処理のコストを抑えることができる。   According to the sealing device of the present invention, the adhesive strength of the seal lip at the inner peripheral end and the outer peripheral end of the annular member made of aluminum die cast is sufficiently increased, and the seal lip is effectively prevented from peeling off over time. And the cost of the surface treatment can be reduced.

本発明の実施の形態に係る密封装置が自動変速機に組み込まれた状態を示す下半分の断面図である。It is sectional drawing of the lower half which shows the state in which the sealing device which concerns on embodiment of this invention was integrated in the automatic transmission. ピストンシール側環状部材の外周端部付近の断面図である。It is sectional drawing of the outer peripheral edge part vicinity of a piston seal side annular member. ピストンシール側環状部材の内周端部付近の断面図である。It is sectional drawing of the inner peripheral edge part vicinity of a piston seal side annular member. キャンセルプレート側環状部材の外周端部付近の断面図である。It is sectional drawing of the outer peripheral edge part vicinity of a cancellation plate side annular member. 実施の形態の変形例に係るピストンシール側環状部材の外周端部付近の断面図である。It is sectional drawing of the outer peripheral edge part vicinity of the piston seal side annular member which concerns on the modification of embodiment.

以下、本発明の実施の形態を図面に基づいてて説明する。
図１は、本発明の実施の形態に係る密封装置が自動変速機に組み込まれた状態を示している。この密封装置１は、キャンセルプレート２と、このキャンセルプレート２が組み込まれたピストンシール３と、キャンセルプレート２とピストンシール３の間に配置されたスプリング４とを備えている。このうち、キャンセルプレート２とピストンシール３とは同軸心状に配置され、ピストンシール３は、ハウジング５やキャンセルプレート２に対して軸方向に移動可能とされている。ピストンシール３とハウジング５との間は圧力室６となっており、この圧力室６に制御油が供給されて圧力室６の圧力が高められると、図１に二点鎖線で示すように、流体圧によりピストンシール３がスプリング４の付勢力に抗して軸方向一方側（図１では右側）へ移動し、当該ピストンシール３の外周端部により多板クラッチ７を押圧することで動力伝達が行われる。なお、図１中Ｏは、密封装置１の軸芯である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which a sealing device according to an embodiment of the present invention is incorporated in an automatic transmission. The sealing device 1 includes a cancel plate 2, a piston seal 3 in which the cancel plate 2 is incorporated, and a spring 4 disposed between the cancel plate 2 and the piston seal 3. Among these, the cancel plate 2 and the piston seal 3 are arranged coaxially, and the piston seal 3 is movable in the axial direction with respect to the housing 5 and the cancel plate 2. A pressure chamber 6 is provided between the piston seal 3 and the housing 5, and when control oil is supplied to the pressure chamber 6 to increase the pressure in the pressure chamber 6, as shown by a two-dot chain line in FIG. The piston seal 3 moves against one side of the axial direction (right side in FIG. 1) against the urging force of the spring 4 by the fluid pressure, and the multi-plate clutch 7 is pressed by the outer peripheral end of the piston seal 3 to transmit power. Is done. In FIG. 1, O is the axis of the sealing device 1.

ピストンシール３は、キャンセルプレート２と対向するアルミダイキャスト製のピストンシール側環状部材１２（環状部材）と、このピストンシール側環状部材１２とハウジング５との間をシールするためにピストンシール側環状部材１２の外周端部１１および内周端部１４にそれぞれ接着された外周側シールリップ１３および内周側シールリップ１５とを備えている。ハウジング５は密封装置１と対応する部位において軸方向他側（図１では左側）へ突出する突出部１６を有し、ピストンシール側環状部材１２は、前記突出部１６に則して軸方向他側へ突出して断面略Ｕ字状に形成されている。このピストンシール側環状部材１２は、ピストンシール３の内周側つまり突出部１６の外周面に沿って軸方向へ延びる内周側円筒部１７と、ピストンシール３の外周側つまり突出部１６の内周面に沿って軸方向へ延びる外周側円筒部１８と、内周側円筒部１７および外周側円筒部１８の軸方向他側端部同士を半径方向に連結する円環部１９とからなる。また、ピストンシール側環状部材１２の半径方向内側つまり円環部１９の半径方向内側には、スプリング４を受ける断面略Ｌ字状のスプリング受け部材２０が取り付けられている。この場合、ピストンシール側環状部材１２は、鋳造により成形されている。   The piston seal 3 includes a piston seal-side annular member 12 (annular member) made of aluminum die casting facing the cancel plate 2 and a piston seal-side annular member for sealing between the piston seal-side annular member 12 and the housing 5. An outer peripheral side seal lip 13 and an inner peripheral side seal lip 15 respectively bonded to the outer peripheral end portion 11 and the inner peripheral end portion 14 of the member 12 are provided. The housing 5 has a protruding portion 16 that protrudes to the other side in the axial direction (left side in FIG. 1) at a portion corresponding to the sealing device 1, and the piston seal-side annular member 12 follows the protruding portion 16. It protrudes to the side and is formed in a substantially U-shaped cross section. The piston seal-side annular member 12 includes an inner peripheral cylindrical portion 17 that extends in the axial direction along the inner peripheral side of the piston seal 3, that is, the outer peripheral surface of the projecting portion 16, and the inner periphery of the piston seal 3. It comprises an outer peripheral cylindrical portion 18 extending in the axial direction along the peripheral surface, and an annular portion 19 that connects the inner peripheral side cylindrical portion 17 and the other axial end of the outer peripheral side cylindrical portion 18 in the radial direction. A spring receiving member 20 having a substantially L-shaped cross section for receiving the spring 4 is attached to the inside of the piston seal side annular member 12 in the radial direction, that is, the inside of the annular portion 19 in the radial direction. In this case, the piston seal side annular member 12 is formed by casting.

また、図２に示すように、外周側シールリップ１３は、外周側円筒部１８の軸方向他側端部から半径方向外方に突出するリップ本体２１と、このリップ本体２１と一体となった接着部分２２とからなる。この接着部分２２は、ピストンシール側環状部材１２の外周端部１１において表面処理（接着材塗装）が施された表面処理部位に接着される。この表面接着部位とは、ピストンシール側環状部材１２の外周端部１１から径方向内方側に亘る部位、つまり外周側円筒部１８の軸方向略中央部から円環部１９の外周部に亘る部位のことである。そして、外周側シールリップ１３は、ハウジング５の突出部１６の半径方向外側の内周面とピストンシール側環状部材１２の外周端部１１との間をシールしている。   Further, as shown in FIG. 2, the outer peripheral side seal lip 13 is integrated with a lip main body 21 that protrudes radially outward from the other axial end of the outer peripheral cylindrical portion 18 and the lip main body 21. It consists of an adhesive portion 22. This adhesion portion 22 is adhered to a surface treatment site that has been subjected to a surface treatment (adhesive coating) at the outer peripheral end 11 of the piston seal side annular member 12. This surface adhesion site refers to a site extending radially inward from the outer peripheral end 11 of the piston seal side annular member 12, that is, extending from the substantially central portion in the axial direction of the outer cylindrical portion 18 to the outer peripheral portion of the annular portion 19. It is a part. The outer peripheral side seal lip 13 seals between the inner peripheral surface on the radially outer side of the protruding portion 16 of the housing 5 and the outer peripheral end portion 11 of the piston seal side annular member 12.

一方、図３に示すように、内周側シールリップ１５は、内周側円筒部１７の軸方向一側（図１では右側）から半径方向内方に突出するリップ本体２３と、このリップ本体２３と一体となった接着部分２４とからなる。この接着部分２４は、ピストンシール側環状部材１２の内周端部１４において表面処理（接着材塗装）が施された表面処理部位に接着される。この表面処理部位とは、内周側円筒部１７の内周側から円環部１９の端縁（後述する溝部４４の縦壁４６）に亘る部位のことである。そして、内周側シールリップ１５は、ハウジング５の突出部１６の半径方向内側の外周面とピストンシール側環状部材１２の内周端部１４との間をシールしている。   On the other hand, as shown in FIG. 3, the inner peripheral side seal lip 15 includes a lip main body 23 projecting radially inward from one axial direction side (right side in FIG. 1) of the inner peripheral side cylindrical portion 17, and the lip main body. 23 and an adhesive portion 24 integrated with 23. The bonding portion 24 is bonded to a surface treatment site that has been subjected to a surface treatment (adhesive coating) at the inner peripheral end 14 of the piston seal side annular member 12. The surface treatment site is a site extending from the inner circumference side of the inner circumference side cylindrical portion 17 to the edge of the annular portion 19 (a vertical wall 46 of the groove portion 44 described later). The inner peripheral side seal lip 15 seals between the radially outer peripheral surface of the protruding portion 16 of the housing 5 and the inner peripheral end portion 14 of the piston seal side annular member 12.

また、図１に示すように、キャンセルプレート２は、ピストンシール３と対向するアルミダイキャスト製のキャンセルプレート側環状部材２６（プレート側環状部材）と、このキャンセルプレート側環状部材２６とピストンシール３との間をシールするためにキャンセルプレート側環状部材２６の外周端部２７に接着されたキャンセルプレート側シールリップ２８（プレート側シールリップ）とを備えている。このキャンセルプレート側シールリップ２８は、ピストンシール側環状部材１２の外周側円筒部１８と外周端部２７との間をシールしている。また、キャンセルプレート側環状部材２６は、半径方向外側に位置する外周部３０と、その半径方向内側に位置するスプリング受け部３１とを有し、断面略クランク状に形成されている。そして、外周側シールリップ１３、内周側シールリップ１５、およびキャンセルプレート側シールリップ２８は、水素化ニトリルゴム（ＨＮＢＲ）、ニトリルゴム（ＮＢＲ）、アクリルゴム（ＡＣＭ）、フッ素ゴム（ＦＫＭ）等のいずれかのゴム素材から選択されて適用される。この場合、キャンセルプレート側環状部材２６も鋳造により成形されている。   As shown in FIG. 1, the cancel plate 2 includes an aluminum die-cast cancel plate side annular member 26 (plate side annular member) facing the piston seal 3, and the cancel plate side annular member 26 and the piston seal 3. The cancel plate side seal lip 28 (plate side seal lip) bonded to the outer peripheral end 27 of the cancel plate side annular member 26 is provided. The cancel plate side seal lip 28 seals between the outer peripheral side cylindrical portion 18 and the outer peripheral end portion 27 of the piston seal side annular member 12. The cancel plate-side annular member 26 has an outer peripheral portion 30 located on the radially outer side and a spring receiving portion 31 located on the radially inner side, and is formed in a substantially crank shape in cross section. The outer peripheral side seal lip 13, the inner peripheral side seal lip 15, and the cancel plate side seal lip 28 are made of hydrogenated nitrile rubber (HNBR), nitrile rubber (NBR), acrylic rubber (ACM), fluorine rubber (FKM), etc. Any one of the rubber materials is selected and applied. In this case, the cancel plate-side annular member 26 is also formed by casting.

そして、図４に示すように、キャンセルプレート側シールリップ２８は、キャンセルプレート側環状部材２６の外周端部２７から半径方向外方に突出するリップ本体３３と、このリップ本体３３と一体となった接着部分３４とからなる。この接着部分３４は、キャンセルプレート側環状部材２６の外周端部２７において表面処理（接着材塗装）が施された表面処理部位に接着される。この表面処理部位とは、外周端部２７の軸方向両側面のことである。また、スプリング受け部３１の内周端部は、止め輪３７によってハウジング５に保持されている。   As shown in FIG. 4, the cancel plate-side seal lip 28 is integrated with a lip main body 33 that protrudes radially outward from the outer peripheral end 27 of the cancel plate-side annular member 26, and the lip main body 33. It consists of an adhesive part 34. The adhesion portion 34 is adhered to a surface treatment portion that has been subjected to surface treatment (adhesive coating) at the outer peripheral end 27 of the cancel plate-side annular member 26. This surface treatment site refers to both side surfaces in the axial direction of the outer peripheral end portion 27. Further, the inner peripheral end portion of the spring receiving portion 31 is held by the housing 5 by a retaining ring 37.

また、図２に示すように、ピストンシール側環状部材１２の外周端部１１における外周側円筒部１８の軸方向他側には、環状の溝部３８が形成されている。この溝部３８の深さ方向は、軸芯Ｏと直交するように半径方向内方側向きとなっている。また、溝部３８には、その底部の深さをさらに略倍程度深くするとともに軸方向の幅を若干広くする複数の凹部４０が周方向所定間隔おきに凹設されている。そして、外周側シールリップ１３の接着部分２２は、ピストンシール側環状部材１２の外周端部１１の溝部３８および凹部４０の深さ方向に充填される充填片４１を有している。この充填片４１は、図示しない金型を用いて外周側シールリップ１３を外周端部１１に加硫接着する際にリップ本体２１および接着部分２２と共に一体成形される。   As shown in FIG. 2, an annular groove 38 is formed on the other axial side of the outer peripheral cylindrical portion 18 at the outer peripheral end 11 of the piston seal side annular member 12. The depth direction of the groove portion 38 is directed inward in the radial direction so as to be orthogonal to the axis O. In addition, the groove portion 38 is provided with a plurality of concave portions 40 which are deepened by approximately double the depth of the bottom portion and slightly wide in the axial direction at predetermined intervals in the circumferential direction. The adhesive portion 22 of the outer peripheral side seal lip 13 has a filling piece 41 filled in the depth direction of the groove 38 and the concave portion 40 of the outer peripheral end 11 of the piston seal side annular member 12. The filling piece 41 is integrally formed together with the lip main body 21 and the bonding portion 22 when the outer peripheral side seal lip 13 is vulcanized and bonded to the outer peripheral end portion 11 using a mold (not shown).

そして、図３に示すように、ピストンシール側環状部材１２の内周端部１４における内周側円筒部１７の軸方向一側端部には、半径方向内方に突出する凸部４３が一体的に設けられている。この凸部４３の内周面には、径方向外方に凹む環状の溝部４４が形成されている。また、溝部４４の軸方向外側（図３では右側）の縦壁４６には、その縦壁４６を軸方向に貫通する複数の貫通孔５０が周方向所定間隔おきに形成されている。各貫通孔５０は、それぞれ略真円形状に開口しているが、周方向に長い長孔であってもよい。そして、内周側シールリップ１５の接着部分２４は、溝部４４に充填された充填片としての環状凸片４５と、この環状凸片４５を用いて溝部４４の軸方向外側（図３では右側）の縦壁４６を軸方向両側から挟み込むように当該縦壁４６の軸方向外側（軸方向反溝部側）に接着される環状鍔部４７と、縦壁４６の各貫通孔５０に充填された状態で環状凸片４５と環状鍔部４７とを軸方向に一体に繋ぐ充填部５１とを有している。この充填部５１は、図示しない金型を用いて内周側シールリップ１５を内周端部１４に加硫接着する際にリップ本体２３と接着部分２４と環状凸片４５および環状鍔部４７と共に一体成形される。   And as shown in FIG. 3, the convex part 43 which protrudes radially inward is integrated in the axial direction one side edge part of the inner peripheral side cylindrical part 17 in the inner peripheral end part 14 of the piston seal side annular member 12. Provided. An annular groove 44 that is recessed radially outward is formed on the inner peripheral surface of the protrusion 43. Further, a plurality of through holes 50 penetrating the vertical wall 46 in the axial direction are formed at predetermined intervals in the circumferential direction on the vertical wall 46 on the axially outer side (right side in FIG. 3) of the groove portion 44. Each through-hole 50 opens in a substantially perfect circle shape, but may be a long hole that is long in the circumferential direction. And the adhesion part 24 of the inner peripheral side seal lip 15 is the annular convex piece 45 as a filling piece with which the groove part 44 was filled, and the axial direction outer side (right side in FIG. 3) of the groove part 44 using this annular convex piece 45. A state in which the vertical wall 46 is sandwiched from both sides in the axial direction so that the vertical flange 46 is bonded to the outside in the axial direction (on the side opposite to the groove in the axial direction) and the through holes 50 of the vertical wall 46 are filled. And a filling portion 51 that integrally connects the annular convex piece 45 and the annular flange portion 47 in the axial direction. The filling portion 51 is used together with the lip main body 23, the adhesive portion 24, the annular convex piece 45, and the annular flange 47 when the inner peripheral side seal lip 15 is vulcanized and bonded to the inner peripheral end portion 14 using a mold (not shown). It is integrally molded.

更に、図４に示すように、キャンセルプレート側環状部材２６の外周端部２７には、その外周端部２７を軸方向に貫通する複数の貫通孔５２が周方向所定間隔おきに形成されている。各貫通孔５２は、それぞれ略真円形状に開口しているが、周方向に長い長孔であってもよい。また、キャンセルプレート側シールリップ２８の接着部分３４は、多板クラッチ７側（図４では右側）の第１環状鍔部３５とその反対側の第２環状鍔部３６を備え、これら両環状鍔部３５，３６によって断面略コ字状に形成されている。そして、第１および第２環状鍔部３５，３６により、キャンセルプレート側環状部材２６の外周端部２７が軸方向両側から挟み込まれており、キャンセルプレート側シールリップ２８とキャンセルプレート側環状部材２６との接着強度が高められている。また、接着部分３４は、キャンセルプレート側環状部材２６の外周端部２７の各貫通孔５２に充填された状態で両環状鍔部３５，３６同士を軸方向に一体に繋ぐ充填部５３を有している。この充填部５３は、図示しない金型を用いてキャンセルプレート側シールリップ２８をキャンセルプレート側環状部材２６の外周端部２７に加硫接着する際にリップ本体３３と接着部分３４と両環状鍔部３５，３６と共に一体成形される。   Further, as shown in FIG. 4, a plurality of through holes 52 penetrating the outer peripheral end portion 27 in the axial direction are formed in the outer peripheral end portion 27 of the cancel plate side annular member 26 at predetermined intervals in the circumferential direction. . Each through hole 52 is opened in a substantially circular shape, but may be a long hole that is long in the circumferential direction. The adhesive portion 34 of the cancel plate side seal lip 28 includes a first annular flange 35 on the multi-plate clutch 7 side (right side in FIG. 4) and a second annular flange 36 on the opposite side. The sections 35 and 36 are formed in a substantially U-shaped cross section. The outer peripheral end portion 27 of the cancel plate side annular member 26 is sandwiched from both sides in the axial direction by the first and second annular flange portions 35 and 36, and the cancel plate side seal lip 28, the cancel plate side annular member 26, The adhesive strength of is increased. Further, the adhesive portion 34 has a filling portion 53 that integrally connects the two annular flange portions 35 and 36 in the axial direction in a state where each through-hole 52 of the outer peripheral end portion 27 of the cancel plate-side annular member 26 is filled. ing. The filling portion 53 is formed when the cancel plate side seal lip 28 is vulcanized and bonded to the outer peripheral end portion 27 of the cancel plate side annular member 26 using a mold (not shown). 35 and 36 are integrally molded.

前記実施の形態では、外周側シールリップ１３をピストンシール側環状部材１２の外周端部１１に加硫接着する際に未加硫のゴム素材を外周側円筒部１８の溝部３８の内部に充填させた充填片４１によって、外周側シールリップ１３の接着部分２２の接着面を深さ方向に延ばしているので、外周端部１１といった限定された部位においてのみ接着される外周側シールリップ１３の接着面積が深さ方向に拡大される。しかも、溝部３８には、当該溝部３８の底部の深さをさらに深くするとともに軸方向の幅を広くした凹部４０が周方向所定間隔おきに凹設されているので、外周側シールリップ１３の加硫接着時に凹部４０にもゴム素材が十分に充填され、外周側シールリップ１３の接着面積がさらに深さ方向に拡大される上、軸方向にも拡大される。これにより、アルミダイキャスト製のピストンシール側環状部材１２の外周端部１１での外周側シールリップ１３の接着力が大幅に高められ、外周側シールリップ１３の経時的な剥がれを効果的に防止することができる。
しかも、凹部４０が溝部３８の周方向所定間隔おきに設けられることにより、凹部を溝部の周方向全域に亘って連続的に設けた場合に比して、ピストンシール側環状部材１２の外周端部１１での剛性を低下させることなく十分に確保され、ピストンシール側環状部材１２の外周端部１１での変形等を効果的に防止することができる。 In the embodiment, when the outer peripheral side seal lip 13 is vulcanized and bonded to the outer peripheral end portion 11 of the piston seal side annular member 12, the unvulcanized rubber material is filled into the groove portion 38 of the outer peripheral side cylindrical portion 18. Since the bonding surface of the bonding portion 22 of the outer peripheral side seal lip 13 is extended in the depth direction by the filled piece 41, the bonding area of the outer peripheral side seal lip 13 bonded only at a limited portion such as the outer peripheral end portion 11 Is expanded in the depth direction. In addition, the groove 38 is provided with recesses 40 having a deeper bottom in the groove 38 and a wider axial width at predetermined intervals in the circumferential direction. The rubber material is also sufficiently filled in the concave portion 40 at the time of sulfur bonding, and the adhesion area of the outer peripheral side seal lip 13 is further expanded in the depth direction and also in the axial direction. Thereby, the adhesive force of the outer peripheral side seal lip 13 at the outer peripheral end portion 11 of the piston seal side annular member 12 made of aluminum die cast is greatly enhanced, and the outer side seal lip 13 is effectively prevented from peeling off with time. can do.
In addition, since the recesses 40 are provided at predetermined intervals in the circumferential direction of the groove 38, the outer peripheral end portion of the piston seal-side annular member 12 is compared with the case where the recesses are continuously provided across the entire circumferential direction of the groove. 11 is sufficiently ensured without lowering the rigidity at 11, and deformation at the outer peripheral end 11 of the piston seal-side annular member 12 can be effectively prevented.

また、内周側シールリップ１５をピストンシール側環状部材１２の内周端部１４に加硫接着する際に未加硫のゴム素材が内周側円筒部１７の凸部４３の溝部４４に充填されて成形される環状凸片４５とこの環状凸片４５から縦壁４６を跨いでその軸方向外側に回り込むように充填された環状鍔部４７とによって、内周側シールリップ１５の接着部分２４の接着面を深さ方向に延ばしているので、内周端部１４といった限定された部位においてのみ接着される内周側シールリップ１５の接着面積が深さ方向に拡大される。しかも、内周側シールリップ１５を加硫接着する際に溝部４４の縦壁４６を軸方向両側から挟み込む環状凸片４５および環状鍔部４７が、未加硫のゴム素材が縦壁４６の貫通孔５０に充填された充填部５１によってピストンシール側環状部材１２の内周端部１４の縦壁４６に弾性的に繋がれるので、ピストンシール側環状部材１２の内周端部１４に対する環状凸片４５および環状鍔部４７の接着力が効果的に向上する。このため、表面処理にばらつきのあるピストンシール側環状部材１２の内周端部１４に内周側シールリップ１５を加硫接着しても、環状凸片４５および環状鍔部４７の接着力が各貫通孔５０内の充填部５１によって弾性的にアシストされて大幅に高められ、内周側シールリップ１５の経時的な剥がれを効果的に防止することができる。   Further, when the inner peripheral side seal lip 15 is vulcanized and bonded to the inner peripheral end portion 14 of the piston seal side annular member 12, the unvulcanized rubber material is filled in the groove portion 44 of the convex portion 43 of the inner peripheral side cylindrical portion 17. The annular convex piece 45 formed and the annular flange 47 filled so as to extend from the annular convex piece 45 across the vertical wall 46 to the outside in the axial direction thereof, and the adhesive portion 24 of the inner peripheral side seal lip 15. Since the adhesive surface is extended in the depth direction, the bonding area of the inner peripheral side seal lip 15 bonded only at a limited portion such as the inner peripheral end portion 14 is expanded in the depth direction. Moreover, when the inner peripheral side seal lip 15 is vulcanized and bonded, the annular convex piece 45 and the annular flange portion 47 that sandwich the vertical wall 46 of the groove portion 44 from both sides in the axial direction are formed so that the unvulcanized rubber material penetrates the vertical wall 46. Since the filling portion 51 filled in the hole 50 is elastically connected to the vertical wall 46 of the inner peripheral end portion 14 of the piston seal side annular member 12, an annular convex piece with respect to the inner peripheral end portion 14 of the piston seal side annular member 12. 45 and the adhesive force of the annular flange 47 are effectively improved. For this reason, even if the inner peripheral side seal lip 15 is vulcanized and bonded to the inner peripheral end portion 14 of the piston seal side annular member 12 with variations in surface treatment, the adhesive force between the annular convex piece 45 and the annular flange 47 is different. It is elastically assisted by the filling portion 51 in the through-hole 50 and is greatly enhanced, and the internal peripheral side seal lip 15 can be effectively prevented from peeling off over time.

更に、キャンセルプレート側シールリップ２８をキャンセルプレート側環状部材２６の外周端部２７に加硫接着する際に外周端部２７を軸方向両側から挟み込んで当該外周端部２７に加硫接着される一対の環状鍔部３５，３６同士が、外周端部２７の各貫通孔５２に充填された充填部５３によって当該外周端部２７に弾性的に繋がれた状態となり、キャンセルプレート側環状部材２６の外周端部２７に対する両環状鍔部３５，３６の接着力が効果的に向上する。このため、表面処理にばらつきのあるキャンセルプレート側環状部材２６の外周端部２７にキャンセルプレート側シールリップ２８を加硫接着しても、両環状鍔部３５，３６の接着力が各貫通孔５２内の充填部５３によってアシストされて大幅に高められ、キャンセルプレート側シールリップ２８の経時的な剥がれを効果的に防止することができる。   Further, when the cancel plate side seal lip 28 is vulcanized and bonded to the outer peripheral end portion 27 of the cancel plate side annular member 26, the outer peripheral end portion 27 is sandwiched from both sides in the axial direction and vulcanized and bonded to the outer peripheral end portion 27. The ring-shaped flange portions 35 and 36 are elastically connected to the outer peripheral end portion 27 by the filling portions 53 filled in the respective through holes 52 of the outer peripheral end portion 27, and the outer periphery of the cancel plate-side annular member 26. The adhesive force of the two annular flange portions 35 and 36 to the end portion 27 is effectively improved. For this reason, even if the cancel plate side seal lip 28 is vulcanized and bonded to the outer peripheral end portion 27 of the cancel plate side annular member 26 having a variation in surface treatment, the adhesive force of both the annular flange portions 35 and 36 is not reduced. Assisted by the inner filling portion 53, it is significantly increased, and the cancel plate-side seal lip 28 can be effectively prevented from peeling off over time.

しかも、表面処理がピストンシール側環状部材１２の内周端部１４および外周端部１１、並びにキャンセルプレート側環状部材２６の外周端部２７といった限定された接着箇所においてのみ行われることになり、環状部材の圧力室に臨む受圧側面からその内周面および外周面を経て前記受圧側面と反対側を向いた面まで広範囲に亘って表面処理を行っていたものに比して、表面処理にかかる工数、費用が削減され、表面処理のコストを抑えることができる。   In addition, the surface treatment is performed only at limited bonding locations such as the inner peripheral end portion 14 and the outer peripheral end portion 11 of the piston seal side annular member 12 and the outer peripheral end portion 27 of the cancel plate side annular member 26. Compared to the surface treatment over a wide range from the pressure-receiving side facing the pressure chamber of the member to the surface facing the opposite side of the pressure-receiving side through its inner and outer peripheral surfaces, man-hours for surface treatment Costs can be reduced and surface treatment costs can be reduced.

なお、本発明は、前記実施の形態に限定されるものではなく、その他種々の変形例を包含している。例えば、前記実施の形態では、外周側円筒部１８の軸方向他側に、深さ方向が軸芯Ｏと直交するように半径方向内方側向きとなる環状の溝部３８を形成したが、図５に示すように、外周側円筒部１８の軸方向他側端部に設けられた環状の溝部５５の他にピストンシール側環状部材１２の対応部位としての円環部１９の外周部にも環状の溝部５６が設けられ、この各溝部５５，５６にそれぞれ充填された充填片５７の先端部同士を同一軸線上において互いに向き合わせるように深さ方向が斜め方向向きとなっていてもよい。この場合、外周側シールリップ１３の加硫接着時に各溝部５５，５６に充填された充填片５７は、それぞれの先端部を互いに向き合わせているために当該溝部５５，５６から抜け難くなっている。これにより、外周端部１１での外周側シールリップ１３の接着力がより一層高められることになり、外周側シールリップ１３の経時的な剥がれをさらに効果的に防止することができる。なお、本変形例で述べた外周側円筒部１８および円環部１９の双方に設けられる溝部５５，５６は、前記実施の形態で述べた外周側円筒部１８の軸方向他側の溝部３８と併用して設けることも可能である。また、各溝部５５，５６に充填された充填片５７の先端部同士を必ずしも同一軸線上において互いに向き合わせるように各溝部の深さ方向を斜め方向向きにする必要はなく、先端部同士を近づける方向で向き合わせるように各溝部の深さ方向がそれぞれ異なる軸線上において斜め方向向きとなっていてもよい。   In addition, this invention is not limited to the said embodiment, The other various modifications are included. For example, in the above-described embodiment, the annular groove portion 38 is formed on the other side in the axial direction of the outer cylindrical portion 18 so as to face the radially inward side so that the depth direction is perpendicular to the axis O. As shown in FIG. 5, in addition to the annular groove 55 provided at the other axial end of the outer cylindrical portion 18, the annular portion 19 as a corresponding portion of the piston seal-side annular member 12 is also annularly formed. The groove 56 may be provided, and the depth direction may be inclined so that the front ends of the filling pieces 57 filled in the grooves 55 and 56 face each other on the same axis. In this case, the filling pieces 57 filled in the grooves 55 and 56 at the time of vulcanization adhesion of the outer peripheral side seal lip 13 are difficult to come out from the grooves 55 and 56 because the respective tip portions thereof face each other. . Thereby, the adhesive force of the outer peripheral side seal lip 13 at the outer peripheral end portion 11 is further enhanced, and it is possible to more effectively prevent the outer peripheral side seal lip 13 from peeling with time. In addition, the groove parts 55 and 56 provided in both the outer peripheral side cylindrical part 18 and the annular part 19 described in the present modification are the same as the groove part 38 on the other side in the axial direction of the outer peripheral side cylindrical part 18 described in the above embodiment. It can also be provided in combination. Moreover, it is not necessary to make the depth direction of each groove part into the diagonal direction so that the front-end | tip parts of the filling piece 57 with which each groove part 55 and 56 was filled may mutually face on the same axis line, and front-end | tip parts are brought close to each other. The depth direction of each groove portion may be inclined on different axes so as to face each other.

また、前記実施の形態では、ピストンシール側環状部材１２の内周端部１４および外周端部１１、並びにキャンセルプレート側環状部材２６の外周端部２７をそれぞれ個別に臨ませたキャビティ内に未加硫のゴム素材を注入して内周側シールリップ１５、外周側シールリップ１３、およびキャンセルプレート側シールリップ２８をそれぞれ一体成形したが、例えば各シールリップのリップ本体を予め成形しておき、それぞれ対応するリップ本体の基部側（接着部分側）とピストンシール側環状部材の内周端部および外周端部並びにキャンセルプレート側環状部材の外周端部とをキャビティ内に臨ませ、このキャビティ内に未加硫のゴム素材を注入してリップ本体の基部に接着部分が一体成形されるようにしてもよい。また、内周側シールリップのリップ本体と接着部分（環状凸片および環状鍔部並びに充填部）とを予め一体成形しておき、環状凸片および環状鍔部のうちの一方と充填部の軸方向一端とが一体成形されずに別途接着材等により接着されて環状凸片および環状鍔部を軸方向に一体に繋ぐようにしてもよい。また、同様に、キャンセルプレート側シールリップのリップ本体と接着部分（両環状鍔部および充填部）とを予め一体成形しておき、一対の環状鍔部のうちの一方と充填部の軸方向一端とが一体成形されずに別途接着材等により接着されて両環状鍔部同士を軸方向に一体に繋ぐようにしてもよい。   In the above-described embodiment, the inner peripheral end 14 and the outer peripheral end 11 of the piston seal side annular member 12 and the outer peripheral end 27 of the cancel plate side annular member 26 are not added to the cavities individually facing each other. The inner peripheral side seal lip 15, the outer peripheral side seal lip 13, and the cancel plate side seal lip 28 were integrally molded by injecting a sulfur rubber material. For example, the lip body of each seal lip was previously molded, The base side (adhesive part side) of the corresponding lip body, the inner and outer peripheral ends of the piston seal-side annular member, and the outer peripheral end of the cancel plate-side annular member face the cavity. A vulcanized rubber material may be injected so that the adhesive portion is integrally formed with the base of the lip body. In addition, the lip body of the inner peripheral side seal lip and the bonding portion (the annular convex piece, the annular flange portion and the filling portion) are integrally formed in advance, and one of the annular convex piece and the annular flange portion and the shaft of the filling portion are formed. One end in the direction may be bonded separately by an adhesive or the like without being integrally formed, and the annular convex piece and the annular flange may be integrally connected in the axial direction. Similarly, the lip body of the cancel plate side seal lip and the adhesive portion (both annular flange portions and filling portion) are integrally formed in advance, and one of the pair of annular flange portions and one axial end of the filling portion are formed. May be bonded separately by an adhesive or the like without being integrally formed, and the two annular flanges may be integrally connected in the axial direction.

１ 密封装置
２ キャンセルプレート
３ ピストンシール
５ ハウジング
７ 多板クラッチ
１１ ピストンシール側環状部材の外周端部
１２ ピストンシール側環状部材（環状部材）
１３ 外周側シールリップ（シールリップ）
１４ ピストンシール側環状部材の内周端部
１５ 内周側シールリップ（シールリップ）
１８ 外周側円筒部（円筒部）
１９ 円環部（ピストンシール側環状部材の対応部位）
２６ キャンセルプレート側環状部材（プレート側環状部材）
２７ キャンセルプレート側環状部材の外周端部
２８ キャンセルプレート側シールリップ（プレート側シールリップ）
３５ 第１環状鍔部
３６ 第２環状鍔部
３８ 外周端部の溝部
４０ 凹部
４１ 外周側シールリップの充填片
４４ 内周端部の溝部
４５ 環状凸片（内周側シールリップの充填片）
４６ 縦壁
４７ 環状鍔部
５０ 内周端部の貫通孔
５２ 外周端部の貫通孔
５３ キャンセルプレート側シールリップの充填部
５５ 外周端部の溝部
５６ 対応部位の溝部
５７ 外周側シールリップの充填片 DESCRIPTION OF SYMBOLS 1 Sealing device 2 Cancel plate 3 Piston seal 5 Housing 7 Multi-plate clutch 11 Piston seal side annular member outer peripheral end 12 Piston seal side annular member (annular member)
13 Outer peripheral side seal lip (seal lip)
14 Inner peripheral end 15 of piston seal side annular member Inner peripheral side seal lip (seal lip)
18 Outer peripheral side cylindrical part (cylindrical part)
19 Circular part (corresponding part of the piston seal side annular member)
26 Canceling plate side annular member (plate side annular member)
27 Outer peripheral end 28 of cancel plate side annular member Cancel plate side seal lip (plate side seal lip)
35 First annular flange 36 Second annular flange 38 Groove 40 at the outer peripheral end Recess 41 Filling piece 44 on the outer peripheral side seal lip 45 Groove 45 on the inner peripheral end (filling piece on the inner peripheral seal lip)
46 A vertical wall 47 An annular flange 50 A through hole 52 at the inner peripheral end 52 A through hole 53 at the outer peripheral end 53 A filling part 55 of the cancel plate side seal lip 56 A groove part 56 at the outer peripheral end part 57 A groove part 57 at the corresponding part

Claims (8)

流体圧力によりハウジング内を軸方向一方側へ移動して多板クラッチを押圧する環状のピストンシールと、このピストンシールの軸線方向一方側に当該ピストンシールと同軸心状に配置された環状のキャンセルプレートとを備えた密封装置であって、
前記ピストンシールは、前記キャンセルプレートと対向するアルミダイキャスト製の環状部材と、この環状部材と前記ハウジングとの間をシールするために前記環状部材の内周端部および外周端部にそれぞれ接着されたシールリップとを有し、
前記環状部材の内周端部および外周端部はそれぞれ環状の溝部を有し、
前記環状部材の内周端部および外周端部のシールリップは、当該内周端部および外周端部の溝部の深さ方向にそれぞれ充填される充填片を有することを特徴とする密封装置。 An annular piston seal that moves in the housing in one axial direction by fluid pressure and presses the multi-plate clutch, and an annular cancel plate that is arranged coaxially with the piston seal on one axial side of the piston seal A sealing device comprising:
The piston seal is bonded to an annular member made of an aluminum die cast facing the cancel plate, and an inner peripheral end and an outer peripheral end of the annular member to seal between the annular member and the housing. A sealing lip,
The inner peripheral end and the outer peripheral end of the annular member each have an annular groove,
The sealing device according to claim 1, wherein the seal lips of the inner peripheral end portion and the outer peripheral end portion of the annular member have filling pieces respectively filled in the depth direction of the groove portions of the inner peripheral end portion and the outer peripheral end portion. 前記環状部材の内周端部および外周端部のシールリップは、未加硫のゴム素材を前記環状部材の内周端部および外周端部にそれぞれ加硫接着することにより、前記充填片を当該内周端部および外周端部のシールリップの構成部分として一体成形したものである請求項１に記載の密封装置。   The seal lips at the inner peripheral end and the outer peripheral end of the annular member are obtained by vulcanizing and bonding an unvulcanized rubber material to the inner peripheral end and the outer peripheral end of the annular member, respectively. The sealing device according to claim 1, wherein the sealing device is integrally formed as a constituent part of the seal lip of the inner peripheral end and the outer peripheral end. 前記外周端部の溝部は、当該溝部よりもさらに深い複数の凹部を周方向所定間隔おきに有している請求項１または２に記載の密封装置。   The sealing device according to claim 1, wherein the groove portion of the outer peripheral end portion has a plurality of recesses deeper than the groove portion at predetermined intervals in the circumferential direction. 前記環状部材の外周端部のシールリップは、前記環状部材の外周端部から径方向内方側に亘って接着され、そのシールリップの径方向内方側に対応する前記環状部材の対応部位は環状の溝部を有し、
この環状部材の対応部位の溝部および前記外周端部の溝部の深さ方向が、当該各溝部に充填された充填片の先端部同士を互いに向き合わせるように斜め方向向きとなっている請求項１〜３のいずれか１つに記載の密封装置。 The seal lip at the outer peripheral end of the annular member is bonded to the radially inner side from the outer peripheral end of the annular member, and the corresponding part of the annular member corresponding to the radially inner side of the seal lip is Having an annular groove,
The depth direction of the groove portion of the corresponding portion of the annular member and the groove portion of the outer peripheral end portion is inclined in an oblique direction so that the front end portions of the filling pieces filled in the respective groove portions face each other. The sealing device according to any one of? 前記環状部材の内周端部における溝部の縦壁は、当該縦壁を軸方向に貫通する複数の貫通孔を周方向所定間隔おきに有し、
前記環状部材の内周端部のシールリップは、前記充填片を用いて前記溝部の縦壁をその軸方向両側から挟み込むように当該縦壁の軸方向反溝部側に接着される環状鍔部と、前記各貫通孔に充填された状態で前記充填片と前記環状鍔部とを軸方向に一体に繋ぐ充填部とを有する請求項１〜４のいずれか１つに記載の密封装置。 The vertical wall of the groove portion at the inner peripheral end of the annular member has a plurality of through holes penetrating the vertical wall in the axial direction at predetermined intervals in the circumferential direction.
The seal lip at the inner peripheral end of the annular member includes an annular flange that is bonded to the axially opposite groove side of the vertical wall so as to sandwich the vertical wall of the groove from both sides in the axial direction using the filling piece. The sealing device according to any one of claims 1 to 4, further comprising a filling portion that integrally connects the filling piece and the annular flange portion in the axial direction in a state where the through holes are filled. 前記環状部材の内周端部のシールリップは、未加硫のゴム素材を前記環状部材の内周端部に加硫接着することにより、前記充填片と前記環状鍔部と前記充填部とを当該シールリップの構成部分として一体成形したものである請求項５に記載の密封装置。   The seal lip at the inner peripheral end of the annular member is obtained by vulcanizing and bonding an unvulcanized rubber material to the inner peripheral end of the annular member, thereby connecting the filling piece, the annular flange, and the filling portion. The sealing device according to claim 5, wherein the sealing device is integrally formed as a constituent part of the seal lip. 前記キャンセルプレートは、アルミダイキャスト製のプレート側環状部材と、このプレート側環状部材と前記ピストンシールとの間をシールするために前記プレート側環状部材の外周端部に接着されたプレート側シールリップとを有し、
前記プレート側環状部材の外周端部は、その外周端部を軸方向に貫通する複数の貫通孔を周方向所定間隔おきに有し、
前記プレート側シールリップは、前記プレート側環状部材の外周端部を軸方向両側から挟み込む一対の環状鍔部と、前記各貫通孔に充填された状態で前記両環状鍔部同士を軸方向に一体に繋ぐ充填部とを有する請求項１〜６のいずれか１つに記載の密封装置。 The cancel plate includes a plate-side annular member made of aluminum die cast, and a plate-side seal lip bonded to an outer peripheral end of the plate-side annular member to seal between the plate-side annular member and the piston seal. And
The outer peripheral end of the plate-side annular member has a plurality of through holes that penetrate the outer peripheral end in the axial direction at predetermined intervals in the circumferential direction.
The plate-side seal lip has a pair of annular flanges sandwiching the outer peripheral end of the plate-side annular member from both sides in the axial direction, and the two annular flanges are integrated in the axial direction while being filled in the through holes. The sealing device according to any one of claims 1 to 6, further comprising: a filling portion that is connected to the first portion. 前記プレート側シールリップは、未加硫のゴム素材を前記プレート側環状部材の外周端部に加硫接着することにより、前記一対の環状鍔部と前記充填部とを当該プレート側シールリップの構成部分として一体成形したものである請求項７に記載の密封装置。   The plate-side seal lip is configured by vulcanizing and bonding an unvulcanized rubber material to the outer peripheral end portion of the plate-side annular member, so that the pair of annular flange portions and the filling portion are configured as the plate-side seal lip. 8. The sealing device according to claim 7, wherein the sealing device is integrally molded as a part.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103851106A (en) * 2012-12-06 2014-06-11 舍弗勒技术股份两合公司 Carrier element for pressure chamber of friction clutch
DE102013218744A1 (en) * 2013-09-18 2015-03-19 Volkswagen Aktiengesellschaft Coupling arrangement, in particular double clutch for a motor vehicle
JP2015102116A (en) * 2013-11-22 2015-06-04 光洋シーリングテクノ株式会社 Sealing device
KR101785936B1 (en) 2015-11-19 2017-10-18 현대 파워텍 주식회사 Auto transmission
KR101994771B1 (en) * 2019-01-16 2019-07-01 한국에스케이에프씰 주식회사 Manufacturing Method of Piston Seal

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JP2009097551A (en) * 2007-10-15 2009-05-07 Kayaba Ind Co Ltd Seal member

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JPS62181757U (en) * 1986-05-12 1987-11-18
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JP2006322602A (en) * 2005-05-20 2006-11-30 Aisin Aw Co Ltd Support using thrust washer
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JP2009097551A (en) * 2007-10-15 2009-05-07 Kayaba Ind Co Ltd Seal member

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103851106A (en) * 2012-12-06 2014-06-11 舍弗勒技术股份两合公司 Carrier element for pressure chamber of friction clutch
CN103851106B (en) * 2012-12-06 2019-03-22 舍弗勒技术股份两合公司 The load-carrying unit of pressure chamber for friction clutch
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KR101785936B1 (en) 2015-11-19 2017-10-18 현대 파워텍 주식회사 Auto transmission
KR101994771B1 (en) * 2019-01-16 2019-07-01 한국에스케이에프씰 주식회사 Manufacturing Method of Piston Seal

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