JP6839976B2 - Sealing device - Google Patents

Sealing device Download PDF

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JP6839976B2
JP6839976B2 JP2016249095A JP2016249095A JP6839976B2 JP 6839976 B2 JP6839976 B2 JP 6839976B2 JP 2016249095 A JP2016249095 A JP 2016249095A JP 2016249095 A JP2016249095 A JP 2016249095A JP 6839976 B2 JP6839976 B2 JP 6839976B2
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peripheral side
outer peripheral
inner peripheral
sealing member
flange portion
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JP2018105323A (en
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菊地　健一
健一 菊地
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Nok Corp
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Nok Corp
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Description

本発明は、密封装置に係り、さらに詳しくは、農作業機械用等といった耐泥水性・ダスト性が要求される等、厳しい外部環境下で用いられる密封装置に関する。本発明の密封装置は、他にハブベアリング用のオイルシール、デファレンシャルギア用のオイルシールとしても用いられる。 The present invention relates to a sealing device, and more particularly to a sealing device used in a harsh external environment such as for agricultural work machines and the like, which is required to have muddy water resistance and dust resistance. The sealing device of the present invention is also used as an oil seal for hub bearings and an oil seal for differential gears.

従来より、外部から泥水・ダスト等が機外側Ｂから機内側Ａへ侵入することを抑制するために、ハウジング５６０と回転軸５６１との間の環状隙間５６２に、図２に示すような密封装置５１０が装着されている。 Conventionally, in order to prevent muddy water, dust, etc. from entering from the outside B to the inside A of the machine, a sealing device as shown in FIG. 2 is provided in the annular gap 562 between the housing 560 and the rotating shaft 561. 510 is attached.

密封装置５１０は、ハウジング５６０の内周面５６０ａに取り付けられる外周側シール部材５２０と、この外周側シール部材５２０の内周側と摺動自在に接触するとともに、回転軸５６１の外周面５６１ａに取り付けられる内周側シール部材５３０と、外周側シール部材５２０の金属環５２２に嵌合されるとともに、ハウジング５６０側から内径方向に向けて延在する保護部材５４０と、内周側シール部材５３０の内周側に嵌合されるともに、保護部材５４０の他方の面５４３ｂに密接する金属材又は樹脂材のカバー部材５５０とを備えるものである。 The sealing device 510 is slidably contacted with the outer peripheral side sealing member 520 attached to the inner peripheral surface 560a of the housing 560 and the inner peripheral side of the outer peripheral side sealing member 520, and is attached to the outer peripheral surface 561a of the rotating shaft 561. The inner peripheral side sealing member 530 and the inner peripheral side sealing member 520 are fitted with the metal ring 522, and the protective member 540 extending from the housing 560 side toward the inner diameter direction and the inner peripheral side sealing member 530. It is fitted on the peripheral side and includes a cover member 550 made of a metal material or a resin material that is in close contact with the other surface 543b of the protective member 540.

上記構成の密封装置５１０は、カバー部材５５０が保護部材５４０に密接することによって、機外側Ｂから飛来した泥水・ダスト等が外周側シール部材５２０及び内周側シール部材５３０の間に侵入することを抑制し、もって、密封装置５１０の耐久性向上を図っている。 In the sealing device 510 having the above configuration, when the cover member 550 is in close contact with the protective member 540, muddy water, dust, etc. flying from the outside B of the machine enter between the outer peripheral side sealing member 520 and the inner peripheral side sealing member 530. The durability of the sealing device 510 is improved.

また、上記構成の密封装置５１０は、カバー部材５５０がゴム材に対して剛性の高い金属材又は樹脂材からなるとともに、このカバー部材５５０が保護部材５４０と密接することによって、泥水・ダスト等が堆積、固着し、カバー部材５５０が変形することを防止し、もって、安定したシール性の維持を図っている。 Further, in the sealing device 510 having the above configuration, the cover member 550 is made of a metal material or a resin material having high rigidity with respect to the rubber material, and the cover member 550 is in close contact with the protective member 540 to prevent muddy water, dust and the like. It prevents the cover member 550 from being deposited and fixed and deformed, thereby maintaining a stable sealing property.

しかし、上記構成の密封装置５１０は、以下の点について更なる改善の余地がある。 However, the sealing device 510 having the above configuration has room for further improvement in the following points.

この密封装置５１０は、近年、泥水・ダスト等の環境が苛酷となる地域で使用される農作業機械に用いられることがあり、このような過酷な環境で密封装置５１０が使用されると、カバー部材５５０が変形し、この変形したカバー部材５５０と保護部材５４０との隙間から泥水・ダスト等が外周側シール部材５２０及び内周側シール部材５３０の摺動部分に侵入する可能性がある。 In recent years, this sealing device 510 may be used for agricultural work machines used in areas where the environment such as muddy water and dust is harsh, and when the sealing device 510 is used in such a harsh environment, a cover member The 550 is deformed, and muddy water, dust, or the like may enter the sliding portions of the outer peripheral side sealing member 520 and the inner peripheral side sealing member 530 through the gap between the deformed cover member 550 and the protective member 540.

特開２００２−９８２３４号公報JP-A-2002-98234

本発明は、以上のような点に鑑みてなされたものであって、その技術的課題は、耐泥水性・ダスト性をより一層向上させることができる密封装置を提供することにある。 The present invention has been made in view of the above points, and a technical object thereof is to provide a sealing device capable of further improving muddy water resistance and dust resistance.

上述した技術的課題を有効に解決するための手段として、本発明は、相対回転する二部材間の環状隙間を密封する密封装置において、前記密封装置は、前記二部材のうちの一方の部材に取り付けられる外周側シール部材と、他方の部材に取り付けられる内周側シール部材と、前記外周側シール部材と前記内周側シール部材との間に取り付けられる保護部材と、前記内周側シール部材に取り付けられるカバー部材と、を備え、前記保護部材は、前記外周側シール部材と前記内周側シール部材との間に配置される円筒部と、前記内周側シール部材の機外側に配置され前記円筒部における軸方向の機外側の端部から内径方向に延在する外周側フランジ部とを有し、前記カバー部材は、前記外周側フランジ部の機外側に配置されるとともに、前記外周側フランジ部の機外側の端面に接触する内周側フランジ部を有し、前記保護部材は、前記外周側シール部材及び内周側シール部材に対して軸方向変位可能に組み付けられているとともに、弾性部材によって前記外周側フランジ部を前記内周側フランジ部に押し付ける方向に弾性付勢されていることを特徴とする。 As a means for effectively solving the above-mentioned technical problems, the present invention is a sealing device for sealing an annular gap between two relative rotating members, wherein the sealing device is applied to one of the two members. On the outer peripheral side seal member to be attached, the inner peripheral side seal member attached to the other member, the protective member attached between the outer peripheral side seal member and the inner peripheral side seal member, and the inner peripheral side seal member. comprising a cover member attached, wherein the protective member includes a cylindrical portion disposed between the inner peripheral side sealing member and the outer peripheral side sealing member, disposed outboard side of the inner peripheral side sealing member and the and an outer peripheral side flange portion that Mashimasu extending radially inward from the axial direction of the outboard end of the cylindrical portion, wherein the cover member is disposed on the outboard side of the outer peripheral flange portion, the outer peripheral side The flange portion has an inner peripheral side flange portion that contacts the outer end surface of the machine, and the protective member is assembled so as to be axially displaceable with respect to the outer peripheral side sealing member and the inner peripheral side sealing member, and is elastic. The member is elastically urged in a direction in which the outer peripheral side flange portion is pressed against the inner peripheral side flange portion.

また、本発明において好ましくは、前記保護部材は、前記円筒部と前記外周側フランジ部とを一体として有し、前記外周側シール部材には、前記円筒部の外周面に摺動自在に接触する凸状部が形成されてなるものである。
According to another embodiment of the present invention, the protective member, and a said cylindrical portion and the front Kigaishu side flange portion integrally, wherein the outer peripheral side sealing member, slidably contacts the outer peripheral surface of the cylindrical portion A convex portion is formed.

また、本発明において好ましくは、前記弾性部材は、コイルスプリングからなり、前記外周側シール部材には、前記コイルスプリングの一端を保持する凹部が設けられてなるものである。 Further, preferably, in the present invention, the elastic member is made of a coil spring, and the outer peripheral side sealing member is provided with a recess for holding one end of the coil spring.

本発明の密封装置によれば、保護部材における円筒部が弾性付勢によって軸方向変位するため、カバー部材と保護部材との密接状態を維持し、密封装置の耐泥水性・ダスト性をより一層向上させることができる。 According to the sealing device of the present invention, since the cylindrical portion of the protective member is displaced in the axial direction by elastic biasing, the close contact between the cover member and the protective member is maintained, and the mud resistance and dust resistance of the sealing device are further improved. Can be improved.

本発明の実施形態に係る密封装置の断面図である。It is sectional drawing of the sealing apparatus which concerns on embodiment of this invention. 従来技術に係る密封装置の断面図である。It is sectional drawing of the sealing device which concerns on the prior art.

次に、本実施形態に係る密封装置１０について、図面に基づいて詳細に説明する。 Next, the sealing device 10 according to the present embodiment will be described in detail with reference to the drawings.

本実施形態に係る密封装置１０は、図１に示すように、ハウジング６０と回転軸６１との間の環状隙間６２に装着されるものであって、ハウジング６０に取り付けられる外周側シール部材２０と、回転軸６１に取り付けられる内周側シール部材３０と、外周側シール部材２０及び内周側シール部材３０との間に保持される保護部材４０と、内周側シール部材３０に取り付けられるカバー部材５０と、保護部材４０を軸方向の機外側Ｂへ向けて弾性付勢する弾性部材７０とを備える。 As shown in FIG. 1, the sealing device 10 according to the present embodiment is mounted in the annular gap 62 between the housing 60 and the rotating shaft 61, and is attached to the outer peripheral side sealing member 20 attached to the housing 60. , A protective member 40 held between the inner peripheral side sealing member 30 attached to the rotating shaft 61, the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30, and a cover member attached to the inner peripheral side sealing member 30. 50 and an elastic member 70 that elastically biases the protective member 40 toward the outer side B of the machine in the axial direction.

外周側シール部材２０は、断面Ｌ字状をなす金属環２２と、この金属環２２に被着されたゴム状弾性体２１とからなるものであって、ハウジング６０の内周面６０ａに嵌合される筒状部２３と、この筒状部２３の軸方向の機内側Ａの端部から内径方向に向けて延在するシール部２４とを備える。 The outer peripheral side sealing member 20 is composed of a metal ring 22 having an L-shaped cross section and a rubber-like elastic body 21 adhered to the metal ring 22, and is fitted to the inner peripheral surface 60a of the housing 60. A tubular portion 23 to be formed and a seal portion 24 extending from the end portion of the machine inside A in the axial direction of the tubular portion 23 toward the inner diameter direction are provided.

内周側シール部材３０は、断面Ｌ字状をなす金属環３２と、この金属環３２に被着されたゴム状弾性体３１とからなるものであって、回転軸６１の外周面６１ａに嵌合される筒状部３３と、この筒状部３３の軸方向の機外側Ｂの端部から外径方向に向けて延在するシール部３４とを備える。 The inner peripheral side sealing member 30 is composed of a metal ring 32 having an L-shaped cross section and a rubber-like elastic body 31 adhered to the metal ring 32, and is fitted on the outer peripheral surface 61a of the rotating shaft 61. A tubular portion 33 to be combined and a seal portion 34 extending from the end of the machine outer side B in the axial direction of the tubular portion 33 in the outer diameter direction are provided.

保護部材４０は、外周側シール部材２０と内周側シール部材３０との間に軸方向へ変位可能に配置されている。 The protective member 40 is arranged so as to be displaceable in the axial direction between the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30.

カバー部材５０は、軸方向に弾性変形可能な板バネからなるものであって、その先端部５２ａは、軸方向の機内側Ａへ向けて弾性付勢されている。 The cover member 50 is made of a leaf spring that can be elastically deformed in the axial direction, and its tip portion 52a is elastically urged toward the inside A of the machine in the axial direction.

弾性部材７０は、保護部材４０の内面に配置されるものである。 The elastic member 70 is arranged on the inner surface of the protective member 40.

なお、上記外周側シール部材２０及び内周側シール部材３０の間における各空間には、不図示のグリースが充填されている。そして、上記各構成の詳細は、下記の通りである。 The spaces between the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30 are filled with grease (not shown). The details of each of the above configurations are as follows.

（外周側シール部材）
筒状部２３は、その外周面がハウジング６０の内周面６０ａと嵌合することによって、ハウジング６０と筒状部２３との間を密封する。また、筒状部２３には、その内周面２３ａが保護部材４０の外周面４１ａと密接することによって、保護部材４０と、筒状部２３との間を密封する凸状部２５が形成されている。 (Outer circumference side seal member)
The tubular portion 23 seals between the housing 60 and the tubular portion 23 by fitting the outer peripheral surface thereof with the inner peripheral surface 60a of the housing 60. Further, the tubular portion 23 is formed with a convex portion 25 that seals between the protective member 40 and the tubular portion 23 by bringing the inner peripheral surface 23a into close contact with the outer peripheral surface 41a of the protective member 40. ing.

シール部２４は、その内周側端部に形成された機外側シールリップ２４ａ及び機内側シールリップ２４ｂが内周側シール部材３０の筒状部３３の外周面３３ａと摺動自在に接触することによって、外周側シール部材２０と内周側シール部材３０との間を密封している。 In the seal portion 24, the machine outer seal lip 24a and the machine inner seal lip 24b formed on the inner peripheral side end portion slidably come into contact with the outer peripheral surface 33a of the tubular portion 33 of the inner peripheral side seal member 30. Therefore, the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30 are sealed.

また、外周側シール部材２０には、その径方長さの途中から機外側Ｂへ向けて延在することによって、内周側シール部材３０のシール部３４と摺動自在に接触し、外周側シール部材２０及び内周側シール部材３０との間を密封する突起部２６が形成されている。また、突起部２６の外周面には、凹部２６ａが形成され、この凹部２６ａには、弾性部材７０の軸方向の機内側Ａの一端が嵌め込まれるように装着されている。 Further, the outer peripheral side seal member 20 is slidably contacted with the seal portion 34 of the inner peripheral side seal member 30 by extending from the middle of the radial length toward the outer side B of the machine, and is in sliding contact with the outer peripheral side. A protrusion 26 is formed to seal between the seal member 20 and the inner peripheral side seal member 30. Further, a recess 26a is formed on the outer peripheral surface of the protrusion 26, and the recess 26a is fitted so that one end of the machine inside A in the axial direction of the elastic member 70 is fitted.

（内周側シール部材）
筒状部３３は、その内周面が回転軸６１の外周面６１ａと嵌合することによって、回転軸６１と筒状部３３との間を密封する。また、筒状部３３は、その外周面３３ａが外周側シール部材２０における機外側シールリップ２４ａ及び機内側シールリップ２４ｂと摺動自在に接触することによって、外周側シール部材２０と、内周側シール部材３０との間を密封する。 (Inner circumference side seal member)
The inner peripheral surface of the tubular portion 33 fits with the outer peripheral surface 61a of the rotating shaft 61, thereby sealing between the rotating shaft 61 and the tubular portion 33. Further, the tubular portion 33 has the outer peripheral side seal member 20 and the inner peripheral side by slidably contacting the outer peripheral surface 33a with the machine outer seal lip 24a and the machine inner seal lip 24b of the outer peripheral side seal member 20. It seals between the seal member 30 and the seal member 30.

シール部３４は、その外周側端部から内径方向へ向けて縮径するサブリップ３５が形成され、このサブリップ３５の先端部３５ａは、保護部材４０の外周側フランジ部４２の一方の面４３ａと摺動自在に接触している。また、このシール部３４の外周側には、弾性部材７０が配置されている。 The seal portion 34 is formed with a sub-lip 35 whose diameter is reduced from the outer peripheral side end portion toward the inner diameter direction, and the tip portion 35a of the sub-lip 35 slides with one surface 43a of the outer peripheral side flange portion 42 of the protective member 40. They are in free contact. Further, an elastic member 70 is arranged on the outer peripheral side of the seal portion 34.

（保護部材）
円筒部４１は、外周面４１ａが外周側シール部材２０における凸状部２５と密接するとともに、内周側が突起部２６の凹部２６ａに装着された弾性部材７０と当接するものであって、軸方向の機外側Ｂの一端から内径方向に延在する外周側フランジ部４２を有する。 (Protective member)
In the cylindrical portion 41, the outer peripheral surface 41a is in close contact with the convex portion 25 of the outer peripheral side sealing member 20, and the inner peripheral side is in contact with the elastic member 70 mounted on the concave portion 26a of the protrusion 26. It has an outer peripheral side flange portion 42 extending in the inner diameter direction from one end of the outer side B of the machine.

外周側フランジ部４２は、その一方の面４３ａが弾性部材７０によって弾性付勢され、かつ、内周側シール部材３０のシール部３４に形成されたサブリップ３５と摺動自在に接触するとともに、他方の面４３ｂがカバー部材５０における内周側フランジ部５２の先端部５２ａと密接する。 One surface 43a of the outer peripheral side flange portion 42 is elastically urged by the elastic member 70, and the outer peripheral side flange portion 42 is slidably in contact with the sublip 35 formed in the seal portion 34 of the inner peripheral side sealing member 30, and the other. Surface 43b is in close contact with the tip end portion 52a of the inner peripheral side flange portion 52 of the cover member 50.

（カバー部材）
カバー部材５０は、内周側シール部材３０の内周面と嵌合される固定部５１と、固定部５１の軸方向の機外側Ｂの一端から外径方向に向けて折り曲げられる内周側フランジ部５２とを有する。そして、内周側フランジ部５２の外周側の先端部５２ａは、保護部材４０における外周側フランジ部４２に対して所要の弾性復元力をもって接触している。 (Cover member)
The cover member 50 has a fixing portion 51 that is fitted to the inner peripheral surface of the inner peripheral side sealing member 30, and an inner peripheral side flange that is bent from one end of the machine outer side B in the axial direction of the fixing portion 51 toward the outer diameter direction. It has a part 52 and. The outer peripheral side tip portion 52a of the inner peripheral side flange portion 52 is in contact with the outer peripheral side flange portion 42 of the protective member 40 with a required elastic restoring force.

（弾性部材）
弾性部材７０は、円筒部４１の内周側で、かつ、内周側シール部材３０におけるシール部３４の外周側に位置するものであって、軸方向に弾性復元力を発揮するコイルスプリングからなる。そして、この弾性部材７０の一端は、軸方向に圧縮された状態で突起部２６における凹部２６ａに装着されている。 (Elastic member)
The elastic member 70 is located on the inner peripheral side of the cylindrical portion 41 and on the outer peripheral side of the seal portion 34 of the inner peripheral side seal member 30, and is composed of a coil spring that exerts an elastic restoring force in the axial direction. .. Then, one end of the elastic member 70 is attached to the recess 26a in the protrusion 26 in a state of being compressed in the axial direction.

上記構成の密封装置１０は、外周側シール部材２０の内周側に内周側シール部材３０が配置されているとともに、外周側シール部材２０と内周側シール部材３０との間に保護部材４０が配置されている。また、弾性部材７０は、その一端が円筒部４１の内側に位置する突起部２６の凹部２６ａに装着されている。また、弾性部材７０の外周側に位置する保護部材４０の円筒部４１は、外周側シール部材２０の筒状部２３の内周側に形成された凸状部２５によって保持されているとともに、凹部２６ａに装着された弾性部材７０によって保持されている。また、円筒部４１の外周側フランジ部４２は、その一方の面４３ａが弾性部材７０によって弾性付勢され、かつ、内周側シール部材３０のシール部３４に形成されたサブリップ３５と摺動自在に接触するとともに、他方の面４３ｂがカバー部材５０における内周側フランジ部５２の先端部５２ａと密接する。 In the sealing device 10 having the above configuration, the inner peripheral side sealing member 30 is arranged on the inner peripheral side of the outer peripheral side sealing member 20, and the protective member 40 is provided between the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30. Is placed. Further, the elastic member 70 is attached to the recess 26a of the protrusion 26 whose one end is located inside the cylindrical portion 41. Further, the cylindrical portion 41 of the protective member 40 located on the outer peripheral side of the elastic member 70 is held by the convex portion 25 formed on the inner peripheral side of the tubular portion 23 of the outer peripheral side seal member 20, and is also recessed. It is held by an elastic member 70 mounted on 26a. Further, the outer peripheral side flange portion 42 of the cylindrical portion 41 has one surface 43a elastically urged by the elastic member 70 and slidable with the sub lip 35 formed in the seal portion 34 of the inner peripheral side seal member 30. The other surface 43b comes into close contact with the tip end portion 52a of the inner peripheral side flange portion 52 of the cover member 50.

これにより、本実施形態に係る密封装置１０は、外周側シール部材２０、内周側シール部材３０、保護部材４０、及びカバー部材５０が組み合わされた状態とされ、保護部材４０が軸方向変位可能とされている。 As a result, the sealing device 10 according to the present embodiment is in a state in which the outer peripheral side sealing member 20, the inner peripheral side sealing member 30, the protective member 40, and the cover member 50 are combined, and the protective member 40 can be displaced in the axial direction. It is said that.

次に、本実施形態に係る密封装置１０における保護部材４０及びカバー部材５０の作用を説明する。 Next, the actions of the protective member 40 and the cover member 50 in the sealing device 10 according to the present embodiment will be described.

まず、機器等が動作することによって、外周側シール部材２０及びこの外周側シール部材２０に保持された保護部材４０が固定されたまま、内周側シール部材３０とカバー部材５０が回転軸６１とともに回転する。 First, when the equipment or the like operates, the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30 and the cover member 50 are together with the rotating shaft 61 while the outer peripheral side sealing member 20 and the protective member 40 held by the outer peripheral side sealing member 20 are fixed. Rotate.

そして、本実施形態に係る密封装置１０における保護部材４０における外周側フランジ部４２は、内周側フランジ部５２に押し付けられることによって、図１に示すように、外周側フランジ部４２と内周側フランジ部５２とが密接した状態となる。ここで、カバー部材５０における内周側フランジ部５２の弾性復元力が低下することによって、外周側フランジ部４２と内周側フランジ部５２との間に隙間が発生しようとすると、外周側フランジ部が弾性部材７０の弾性復元力によって軸方向に押し付けられる。そして、保護部材４０が内周側フランジ部５２と当接する位置まで軸方向変位することで、外周側フランジ部４２と内周側フランジ部とが再び密接する。 Then, the outer peripheral side flange portion 42 of the protective member 40 in the sealing device 10 according to the present embodiment is pressed against the inner peripheral side flange portion 52, so that the outer peripheral side flange portion 42 and the inner peripheral side flange portion 42 and the inner peripheral side are as shown in FIG. The flange portion 52 is in close contact with the flange portion 52. Here, when the elastic restoring force of the inner peripheral side flange portion 52 in the cover member 50 is reduced and a gap is generated between the outer peripheral side flange portion 42 and the inner peripheral side flange portion 52, the outer peripheral side flange portion Is axially pressed by the elastic restoring force of the elastic member 70. Then, the protective member 40 is displaced in the axial direction to a position where it comes into contact with the inner peripheral side flange portion 52, so that the outer peripheral side flange portion 42 and the inner peripheral side flange portion are brought into close contact with each other again.

以上により、本実施形態に係る密封装置１０によれば、カバー部材５０の弾性復元力が低下しても、保護部材４０における円筒部４１が軸方向に変位することによって、保護部材４０とカバー部材５０との接触状態を維持することができる。したがって、保護部材４０とカバー部材５０との間に隙間が生じることがなくなり、泥水、ダスト等が外周側シール部材２０及び内周側シール部材３０との間に侵入することを防止する。 As described above, according to the sealing device 10 according to the present embodiment, even if the elastic restoring force of the cover member 50 is reduced, the cylindrical portion 41 of the protective member 40 is displaced in the axial direction, so that the protective member 40 and the cover member are displaced. The contact state with 50 can be maintained. Therefore, a gap is not generated between the protective member 40 and the cover member 50, and muddy water, dust, etc. are prevented from entering between the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30.

また、本実施形態に係る密封装置１０によれば、外周側シール部材２０の筒状部２３の内周面２３ａに形成された凸状部２５が保護部材４０における円筒部４１の外周面４１ａと接触することで、外周側シール部材２０の筒状部２３と円筒部４１との間を密封すると同時に、円筒部４１を軸方向変位が可能となるように保持している。 Further, according to the sealing device 10 according to the present embodiment, the convex portion 25 formed on the inner peripheral surface 23a of the tubular portion 23 of the outer peripheral side sealing member 20 is the outer peripheral surface 41a of the cylindrical portion 41 of the protective member 40. By contacting, the cylindrical portion 23 and the cylindrical portion 41 of the outer peripheral side sealing member 20 are sealed, and at the same time, the cylindrical portion 41 is held so that it can be displaced in the axial direction.

また、本実施形態に係る密封装置１０によれば、外周側シール部材２０のシール部２４に形成された突起部２６が内周側シール部材３０のシール部３４と摺動自在に接触することで、外周側シール部材２０と内周側シール部材３０との間を密封すると同時に、突起部２６に形成された凹部２６ａが弾性部材７０を保持している。これにより、弾性部材７０が外周側シール部材２０に対して強固に取り付けられることになる。 Further, according to the sealing device 10 according to the present embodiment, the protrusion 26 formed on the sealing portion 24 of the outer peripheral side sealing member 20 is slidably contacted with the sealing portion 34 of the inner peripheral side sealing member 30. At the same time that the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30 are sealed, the recess 26a formed in the protrusion 26 holds the elastic member 70. As a result, the elastic member 70 is firmly attached to the outer peripheral side seal member 20.

また、本実施形態に係る密封装置１０によれば、内周側シール部材３０のシール部３４に形成されたサブリップ３５が保護部材４０における外周側フランジ部４２と接触することによって、泥水、ダスト等が外周側シール部材２０及び内周側シール部材３０との間に侵入することを防止する。 Further, according to the sealing device 10 according to the present embodiment, the sub-lip 35 formed on the sealing portion 34 of the inner peripheral side sealing member 30 comes into contact with the outer peripheral side flange portion 42 of the protective member 40, so that muddy water, dust, etc. Is prevented from entering between the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30.

また、本実施形態に係る密封装置１０によれば、外周側シール部材２０及び内周側シール部材３０における各空間にグリースが充填されているため、グリースが外部から侵入しようとする泥水に対する撥水効果やダストに対する捕捉性を発揮することで泥水、ダスト等の侵入を防止し、あわせて、保護部材４０における円筒部４１がスムーズに軸方向に変位する潤滑剤としての機能を発揮する。 Further, according to the sealing device 10 according to the present embodiment, since the spaces in the outer peripheral side sealing member 20 and the inner peripheral side sealing member 30 are filled with grease, the grease repels water against muddy water that is about to enter from the outside. By demonstrating the effect and the ability to capture dust, it prevents the intrusion of muddy water, dust, etc., and at the same time, it exerts a function as a lubricant in which the cylindrical portion 41 of the protective member 40 is smoothly displaced in the axial direction.

また、本実施形態に係る密封装置１０におけるサブリップ３５は、保護部材４０が軸方向に変位した際に、これに追従できるよう予めリップ長さに余裕を持たせてもよい。 Further, the sub-lip 35 in the sealing device 10 according to the present embodiment may have a margin in the lip length in advance so that the protective member 40 can follow the displacement in the axial direction.

なお、本発明に係る弾性部材は、金属製のコイルスプリングの他に、らせん状の樹脂であってもよく、筒状のゴムであってもよく、軸方向に保護部材を押圧することができるものであれば、特に限定されない。 In addition to the metal coil spring, the elastic member according to the present invention may be a spiral resin or a tubular rubber, and can press the protective member in the axial direction. If it is a thing, it is not particularly limited.

１０ 密封装置
２０ 外周側シール部材
２１ ゴム状弾性体
２２ 金属環
２３ 筒状部
２３ａ 内周面
２４ シール部
２４ａ 機外側シールリップ
２４ｂ 機内側シールリップ
２５ 凸状部
２６ 突起部
２６ａ 凹部
３０ 内周側シール部材
３１ ゴム状弾性体
３２ 金属環
３３ 筒状部
３３ａ 外周面
３４ シール部
３５ サブリップ
３５ａ 先端部
４０ 保護部材
４１ 円筒部
４１ａ 外周面
４２ 外周側フランジ部
４３ａ 一方の面
４３ｂ 他方の面
５０ カバー部材
５１ 固定部
５２ 内周側フランジ部
５２ａ 先端部
６０ ハウジング
６０ａ 内周面
６１ 回転軸
６１ａ 外周面
６２ 環状隙間
７０ 弾性部材
Ａ 機内側
Ｂ 機外側 10 Sealing device 20 Outer peripheral side sealing member 21 Rubber elastic body 22 Metal ring 23 Cylindrical part 23a Inner peripheral surface 24 Sealing part 24a Machine outer sealing lip 24b Machine inner sealing lip 25 Convex part 26 Protruding part 26a Recessed part 30 Inner peripheral side Seal member 31 Rubber-like elastic body 32 Metal ring 33 Cylindrical portion 33a Outer peripheral surface 34 Seal portion 35 Sublip 35a Tip portion 40 Protective member 41 Cylindrical portion 41a Outer peripheral surface 42 Outer peripheral side flange portion 43a One surface 43b The other surface 50 Cover member 51 Fixed part 52 Inner peripheral side flange part 52a Tip part 60 Housing 60a Inner peripheral surface 61 Rotating shaft 61a Outer peripheral surface 62 Circular gap 70 Elastic member A Machine inside B Machine outside

Claims (3)

相対回転する二部材間の環状隙間を密封する密封装置において、
前記密封装置は、前記二部材のうちの一方の部材に取り付けられる外周側シール部材と、他方の部材に取り付けられる内周側シール部材と、前記外周側シール部材と前記内周側シール部材との間に取り付けられる保護部材と、前記内周側シール部材に取り付けられるカバー部材と、を備え、
前記保護部材は、前記外周側シール部材と前記内周側シール部材との間に配置される円筒部と、前記内周側シール部材の機外側に配置され前記円筒部における軸方向の機外側の端部から内径方向に延在する外周側フランジ部とを有し、
前記カバー部材は、前記外周側フランジ部の機外側に配置されるとともに、前記外周側フランジ部の機外側の端面に接触する内周側フランジ部を有し、
前記保護部材は、前記外周側シール部材及び内周側シール部材に対して軸方向変位可能に組み付けられているとともに、弾性部材によって前記外周側フランジ部を前記内周側フランジ部に押し付ける方向に弾性付勢されていることを特徴とする密封装置。 In a sealing device that seals an annular gap between two relative rotating members
The sealing device includes an outer peripheral side sealing member attached to one of the two members, an inner peripheral side sealing member attached to the other member, the outer peripheral side sealing member, and the inner peripheral side sealing member. A protective member attached between them and a cover member attached to the inner peripheral side seal member are provided.
The protective member has a cylindrical portion arranged between the outer peripheral side sealing member and the inner peripheral side sealing member, and an axial outer side of the cylindrical portion arranged on the outer side of the inner peripheral side sealing member. and an outer peripheral side flange portion that Mashimasu extending radially inwardly from the end portion,
The cover member is arranged on the outer side of the machine on the outer peripheral side flange portion, and has an inner peripheral side flange portion that contacts the end surface of the outer peripheral side flange portion on the outer side of the machine.
The protective member is assembled so as to be axially displaceable with respect to the outer peripheral side sealing member and the inner peripheral side sealing member, and is elastic in a direction in which the outer peripheral side flange portion is pressed against the inner peripheral side flange portion by the elastic member. A sealing device characterized by being urged. 請求項１に記載の密封装置において、
前記保護部材は、前記円筒部と前記外周側フランジ部とを一体として有し、
前記外周側シール部材には、前記円筒部の外周面に摺動自在に接触する凸状部が形成されていることを特徴とする密封装置。 In the sealing device according to claim 1,
The protective member, and a said cylindrical portion and the front Kigaishu side flange portion integrally,
A sealing device characterized in that the outer peripheral side sealing member is formed with a convex portion that slidably contacts the outer peripheral surface of the cylindrical portion. 請求項１又は２に記載の密封装置において、
前記弾性部材は、コイルスプリングからなり、
前記外周側シール部材には、前記コイルスプリングの一端を保持する凹部が設けられていることを特徴とする密封装置。 In the sealing device according to claim 1 or 2.
The elastic member is composed of a coil spring.
A sealing device characterized in that the outer peripheral side sealing member is provided with a recess for holding one end of the coil spring.
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JPS595826Y2 (en) * 1981-10-24 1984-02-22 川崎重工業株式会社 Rotating cylinder sealing device
JPH0614139Y2 (en) * 1988-11-28 1994-04-13 エヌオーケー株式会社 Sealing device
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