JP2020029940A - Seal mechanism for hydraulically fitted hub - Google Patents

Seal mechanism for hydraulically fitted hub Download PDF

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JP2020029940A
JP2020029940A JP2018157312A JP2018157312A JP2020029940A JP 2020029940 A JP2020029940 A JP 2020029940A JP 2018157312 A JP2018157312 A JP 2018157312A JP 2018157312 A JP2018157312 A JP 2018157312A JP 2020029940 A JP2020029940 A JP 2020029940A
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hub
convex portion
mounting member
seal mechanism
peripheral surface
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JP7010790B2 (en
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広行 橋本
Hiroyuki Hashimoto
広行 橋本
古川　泰成
Yasunari Furukawa
泰成 古川
雄一郎 徳永
Yuichiro Tokunaga
雄一郎 徳永
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Eagle Industry Co Ltd
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Eagle Industry Co Ltd
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Abstract

To provide a seal mechanism for a hydraulically fitted hub, capable of suppressing the leakage of pressure oil supplied between a mounting member and the hub from an axial end of each component.SOLUTION: The seal mechanism for suppressing the leakage of pressure oil supplied between a mounting member 51 and a hub 11 hydraulically fitted to the outer periphery side of the mounting member 51 includes an annular protruded part 17 provided on the inner periphery side of a recessed part 16 by providing the annular recessed part 16 in an end face 15 of the hub 11. The protruded part 17 has, at least part of an inner peripheral face, a tapered portion 18 gradually reduced in inner diameter toward a protruded part front end 17a. The hub 11 is used as a diaphragm coupling hub to be connected to a center tube via a diaphragm.SELECTED DRAWING: Figure 2

Description

本発明は、装着部材と前記装着部材の外周側に油圧嵌めするハブとの間に供給する圧油の漏洩を抑制する油圧嵌め用ハブのシール機構に関する。   The present invention relates to a sealing mechanism for a hydraulic fitting hub that suppresses leakage of pressure oil supplied between a mounting member and a hub that is hydraulically fitted to an outer peripheral side of the mounting member.

従来から例えば図６に示すダイアフラムカップリング１が知られており、このダイアフラムカップリング１は、ハブ１１からダイアフラム３１を介してセンターチューブ４１に連なる、或いは反対にセンターチューブ４１からダイアフラム３１を介してハブ１１に連なる回転トルク伝達経路を備えている。   Conventionally, for example, a diaphragm coupling 1 shown in FIG. 6 is known, and this diaphragm coupling 1 is connected to a center tube 41 from a hub 11 via a diaphragm 31, or conversely, from a center tube 41 via a diaphragm 31. A rotation torque transmission path connected to the hub 11 is provided.

ハブ１１は、円筒状を呈するハブ本体１２を備え、このハブ本体１２の軸方向一方の端部にダイアフラム３１を保持するためのフランジ部１３が一体に設けられている。   The hub 11 includes a hub body 12 having a cylindrical shape, and a flange portion 13 for holding the diaphragm 31 is integrally provided at one axial end of the hub body 12.

また、ハブ１１は、その内周側に挿入する出力軸または入力軸等の装着部材５１に連結される。   Further, the hub 11 is connected to a mounting member 51 such as an output shaft or an input shaft inserted on the inner peripheral side.

装着部材５１とハブ１１との連結は、いわゆる油圧嵌めにより行われる。   The connection between the mounting member 51 and the hub 11 is performed by so-called hydraulic fitting.

すなわち油圧嵌めは、装着部材５１とハブ１１とを油圧を利用して嵌合するもので、装着部材５１とハブ１１とを嵌合するとき、またはハブ１１から装着部材５１を引き抜くときに、装着部材５１とハブ１１との嵌合面に圧油を供給してハブ１１を拡径させることにより、嵌合および引き抜きを可能としている。   That is, the hydraulic fitting is a method in which the mounting member 51 and the hub 11 are fitted using hydraulic pressure. When the mounting member 51 is fitted to the hub 11 or when the mounting member 51 is pulled out from the hub 11, the mounting is performed. By supplying pressure oil to a fitting surface between the member 51 and the hub 11 to expand the diameter of the hub 11, fitting and pulling out are possible.

このため、装着部材５１の外周面にテーパー面５４が設けられるとともに対応してハブ１１の内周面にテーパー面１４が設けられている。また装着部材５１の内部に圧油の供給路５５が設けられ、供給路５５は装着部材５１の外周面に開口している。したがって供給路５５から装着部材５１とハブ１１との嵌合面に圧油を供給すると（矢印Ａ）、ハブ１１が油圧で拡径するので、装着部材５１とハブ１１とを嵌合することが可能とされ、またハブ１１から装着部材５１を引き抜くことが可能とされる。   For this reason, the tapered surface 54 is provided on the outer peripheral surface of the mounting member 51 and the tapered surface 14 is provided on the inner peripheral surface of the hub 11 correspondingly. A supply path 55 for the pressure oil is provided inside the mounting member 51, and the supply path 55 is open to the outer peripheral surface of the mounting member 51. Therefore, when pressure oil is supplied from the supply path 55 to the fitting surface between the mounting member 51 and the hub 11 (arrow A), the diameter of the hub 11 is increased by hydraulic pressure, so that the mounting member 51 and the hub 11 can be fitted. The mounting member 51 can be pulled out from the hub 11.

特開２０１０−１８５５２５公報JP 2010-185525 A

しかしながら上記油圧嵌め構造によると、装着部材５１とハブ１１との間に供給する圧油が両部品１１，５１間の軸方向端部から漏洩することがあり（矢印Ｂ）、圧油が多量に漏洩すると、ハブ１１の拡径量が不足して油圧嵌めが円滑に行われなかったり、或いは漏洩した圧油がダイアフラム３１等の周辺部品を汚損したりすることが懸念される。   However, according to the above-mentioned hydraulic fitting structure, the pressure oil supplied between the mounting member 51 and the hub 11 may leak from the axial end between the two components 11 and 51 (arrow B), and a large amount of the pressure oil is generated. If there is a leak, there is a concern that the diameter of the hub 11 is insufficient and the hydraulic fitting is not performed smoothly or the leaked pressure oil contaminates peripheral parts such as the diaphragm 31.

本発明は以上の点に鑑みて、装着部材とハブとの間に供給する圧油が両部品間の軸方向端部から漏洩するのを抑制することができる油圧嵌め用ハブのシール機構を提供することを課題とする。   In view of the above, the present invention provides a seal mechanism for a hydraulic fitting hub that can suppress leakage of pressurized oil supplied between a mounting member and a hub from an axial end portion between both parts. The task is to

上記課題を解決するため、本発明の油圧嵌め用ハブのシール機構は、装着部材と前記装着部材の外周側に油圧嵌めするハブとの間に供給する圧油の漏洩を抑制するシール機構であって、前記ハブの端面に環状の凹部を設けることにより前記凹部の内周側に設けられた環状の凸部を備え、前記凸部は、その内周面の少なくとも一部に、凸部先端へ向けて内径寸法が徐々に縮小する向きのテーパー部を備えることを特徴とする。   In order to solve the above problems, a seal mechanism for a hydraulic fitting hub according to the present invention is a seal mechanism that suppresses leakage of pressure oil supplied between a mounting member and a hub that is hydraulically fitted to an outer peripheral side of the mounting member. An annular convex portion provided on the inner peripheral side of the concave portion by providing an annular concave portion on the end surface of the hub, and the convex portion is provided on at least a part of the inner peripheral surface thereof at a tip of the convex portion. It is characterized by having a tapered portion in which the inner diameter dimension gradually decreases toward it.

また、実施の態様として、上記記載のシール機構において、前記凸部は、その内周面の全長に亙って前記テーパー部を備えることを特徴とする。   Further, as an embodiment, in the above-described sealing mechanism, the convex portion is provided with the tapered portion over the entire length of an inner peripheral surface thereof.

また、実施の態様として、上記記載のシール機構において、前記凸部は、その軸方向中間位置に折り曲げ部を備え、前記凸部の根元部から前記折り曲げ部へかけて前記テーパー部が設けられ、前記折り曲げ部から凸部先端へかけて内径寸法が徐々に拡大する向きの先端テーパー部が設けられていることを特徴とする。   Further, as an embodiment, in the seal mechanism described above, the convex portion includes a bent portion at an axially intermediate position thereof, and the tapered portion is provided from a root portion of the convex portion to the bent portion, It is characterized in that a tip tapered portion is provided in a direction in which the inner diameter dimension gradually increases from the bent portion to the tip of the convex portion.

また、実施の態様として、上記記載のシール機構において、前記ハブは、ダイアフラムを介してセンターチューブに連結されるダイアフラムカップリング用ハブとして用いられることを特徴とする。   Further, as an embodiment, in the above-described sealing mechanism, the hub is used as a diaphragm coupling hub connected to a center tube via a diaphragm.

本発明では、ハブの端面に環状の凹部が設けられることにより凹部の内周側に環状の凸部が設けられ、凸部の内周面に凸部先端へ向けて内径寸法が徐々に縮小する向きのテーパー部が設けられているため、このテーパー部を堰状シールとして圧油をシールすることが可能とされる。したがって圧油が多量に漏洩するのを抑制することができ、これによりハブの拡径量が不足して油圧嵌めが円滑に行われなかったり、或いは漏洩した圧油がダイアフラム等の周辺部品を汚損したりするのを抑制することができる。   In the present invention, the annular concave portion is provided on the end face of the hub, so that the annular convex portion is provided on the inner peripheral side of the concave portion, and the inner diameter dimension gradually decreases on the inner peripheral surface of the convex portion toward the tip of the convex portion. Since the tapered portion in the direction is provided, it is possible to seal the pressure oil using the tapered portion as a weir-like seal. Therefore, it is possible to prevent a large amount of pressure oil from leaking, whereby the amount of expansion of the hub is insufficient and the hydraulic fitting is not smoothly performed, or the leaked pressure oil contaminates peripheral parts such as the diaphragm. Can be suppressed.

実施の形態に係るシール機構を備える油圧嵌め用ハブの断面図Sectional view of a hydraulic fitting hub provided with a seal mechanism according to an embodiment. 同ハブの要部拡大断面図であって図１におけるＣ部拡大図FIG. 2 is an enlarged sectional view of a main part of the same hub, and is an enlarged view of a portion C in FIG. 1. 他の実施の形態に係るシール機構を備える油圧嵌め用ハブの要部断面図Sectional view of a relevant part of a hydraulic fitting hub including a sealing mechanism according to another embodiment. 他の実施の形態に係るシール機構を備える油圧嵌め用ハブの要部断面図Sectional view of a relevant part of a hydraulic fitting hub including a sealing mechanism according to another embodiment. 他の実施の形態に係るシール機構を備える油圧嵌め用ハブの要部断面図Sectional view of a relevant part of a hydraulic fitting hub including a sealing mechanism according to another embodiment. 従来例に係る油圧嵌め用ハブを備えるダイアフラムカップリングの断面図Sectional view of a diaphragm coupling having a hydraulic fitting hub according to a conventional example 比較例に係るシール機構を備える油圧嵌め用ハブの要部断面図Sectional view of main part of hydraulic fitting hub provided with seal mechanism according to comparative example 同ハブの要部拡大断面図であって図７におけるＤ部拡大図FIG. 8 is an enlarged sectional view of a main part of the hub, and is an enlarged view of a D part in FIG. 7.

図１に示すように、ハブ１１は、円筒状を呈するハブ本体１２を備え、このハブ本体１２の軸方向一方（図では左方）の端部にフランジ部１３が一体に設けられている。ハブ１１は例えば、ダイアフラム３１（図６）を介してセンターチューブ４１（図６）に連結されるダイアフラムカップリング用のハブとして用いられる。   As shown in FIG. 1, the hub 11 includes a hub body 12 having a cylindrical shape, and a flange portion 13 is integrally provided at one axial end (left side in the figure) of the hub body 12. The hub 11 is used, for example, as a diaphragm coupling hub connected to a center tube 41 (FIG. 6) via a diaphragm 31 (FIG. 6).

ハブ１１は、その内周側に挿入する出力軸または入力軸等の装着部材５１に連結される。ハブ１１および装着部材５１は何れも金属製の部品である。   The hub 11 is connected to a mounting member 51 such as an output shaft or an input shaft inserted on the inner peripheral side. Both the hub 11 and the mounting member 51 are metal parts.

装着部材５１とハブ１１との連結は、油圧嵌めにより行われる。   The connection between the mounting member 51 and the hub 11 is performed by hydraulic fitting.

油圧嵌めは、装着部材５１とハブ１１とを油圧を利用して嵌合するものであって、すなわち装着部材５１とハブ１１とを嵌合するとき、またはハブ１１から装着部材５１を引き抜くときに、装着部材５１とハブ１１との嵌合面に圧油を供給してハブ１１を拡径させることにより、嵌合および引き抜きを可能としている。   The hydraulic fitting is to fit the mounting member 51 and the hub 11 using hydraulic pressure, that is, when fitting the mounting member 51 to the hub 11 or when pulling out the mounting member 51 from the hub 11. By supplying pressure oil to the fitting surface between the mounting member 51 and the hub 11 to expand the diameter of the hub 11, fitting and pulling out are possible.

このため、装着部材５１の外周面に、軸方向一方（フランジ側）から軸方向他方（図では右方、反フランジ側））へかけて外径寸法が徐々に拡大する向きのテーパー面５４が設けられるとともに、対応してハブ１１の内周面に、軸方向一方から軸方向他方へかけて内径寸法が徐々に拡大する向きのテーパー面１４が設けられている。また装着部材５１の内部に圧油の供給路５５が設けられ、供給路５５は装着部材５１の外周面に開口している。したがって供給路５５から装着部材５１とハブ１１との嵌合面に圧油が供給されると（矢印Ａ）、このときハブ１１が油圧で拡径するので、装着部材５１とハブ１１とを嵌合することが可能とされ、またハブ１１から装着部材５１を引き抜くことが可能とされる。装着部材５１はその外周面にテーパー面５４が設けられているので、テーパー軸と称されることがある。   For this reason, on the outer peripheral surface of the mounting member 51, a tapered surface 54 whose outer diameter dimension gradually increases from one axial side (flange side) to the other axial side (right side in the figure, opposite flange side) is provided. In addition, a tapered surface 14 is provided on the inner peripheral surface of the hub 11 so that the inner diameter gradually increases from one axial direction to the other axial direction. A supply path 55 for the pressure oil is provided inside the mounting member 51, and the supply path 55 is open to the outer peripheral surface of the mounting member 51. Therefore, when pressure oil is supplied from the supply path 55 to the fitting surface between the mounting member 51 and the hub 11 (arrow A), the diameter of the hub 11 is increased by hydraulic pressure at this time, so that the mounting member 51 and the hub 11 are fitted. The mounting member 51 can be pulled out from the hub 11. Since the mounting member 51 is provided with a tapered surface 54 on its outer peripheral surface, it may be referred to as a tapered shaft.

上記構成の油圧嵌め構造では、装着部材５１とハブ１１との間に供給する圧油が両部品１１，５１の軸方向一方の端部から漏洩することがあり、圧油が多量に漏洩して油圧が低下すると、ハブ１１の拡径量が不足して油圧嵌めが円滑に行われなかったり、或いは漏洩した圧油がダイアフラム３１等の周辺部品を汚損したりすることが懸念される。そこで当該実施の形態では、以下のような圧油に対するシール機構が設けられている。   In the hydraulic fitting structure having the above configuration, the pressure oil supplied between the mounting member 51 and the hub 11 may leak from one end in the axial direction of the two components 11, 51, and a large amount of the pressure oil leaks. When the hydraulic pressure is reduced, there is a concern that the diameter of the hub 11 is insufficient and the hydraulic fitting is not performed smoothly or the leaked pressure oil contaminates peripheral parts such as the diaphragm 31. Therefore, in this embodiment, a sealing mechanism for pressure oil as described below is provided.

すなわち図２に拡大して示すように、ハブ１１の軸方向一方の端面１５に環状の凹部１６が設けられ、これによりこの凹部１６の内周側に環状の凸部１７が設けられている。凸部１７はその径方向幅よりも軸方向長さのほうが大きく形成されている。   That is, as shown in an enlarged manner in FIG. 2, an annular concave portion 16 is provided on one end surface 15 of the hub 11 in the axial direction, and an annular convex portion 17 is provided on the inner peripheral side of the concave portion 16. The convex portion 17 is formed to have a greater axial length than its radial width.

凸部１７はその内周面に、凸部先端１７ａへ向けて内径寸法が徐々に縮小する向きのテーパー部１８が設けられるとともに、その外周面にも同じ方向に傾斜するテーパー部１９が設けられており、これにより凸部１７はその全体がリップ状とされ、凸部先端１７ａが装着部材５１の外周面に接触することにより圧油に対してシール作用を発揮する堰状シールないしリップ状シールとして作動することが可能とされている。   The convex portion 17 is provided on its inner peripheral surface with a taper portion 18 whose inner diameter dimension gradually decreases toward the convex portion tip 17a, and on the outer peripheral surface thereof, a taper portion 19 inclined in the same direction is provided. As a result, the convex portion 17 has a lip shape as a whole, and a weir-shaped seal or a lip-shaped seal that exerts a sealing action against pressure oil when the convex portion tip 17a contacts the outer peripheral surface of the mounting member 51. It is possible to operate as.

凸部１７は、図７および図８の比較例に示すように、ハブ１１の軸方向一方の端面１５に切削加工を施して凹部１６を形成することにより凹部１６と同時に形成されるが、このようにハブ１１の軸方向一方の端面１５に切削加工を施すだけでは、凸部１７の内周面がハブ１１の内周面（テーパー面１４）の延長線上であってハブ１１の内周面に対し角度を持たないため、凸部１７は堰状シールないしリップ状シールとして装着部材５１の外周面に接触することができない。そこで、切削加工に加えて、凸部１７を径方向内方へ向けて斜めに押圧加工ないし絞り加工することにより凸部１７を塑性変形させ、これにより凸部１７をリップ状とし、凸部１７が堰状シールないしリップ状シールとして装着部材５１の外周面に接触するようにする。   As shown in the comparative example of FIGS. 7 and 8, the convex portion 17 is formed simultaneously with the concave portion 16 by forming a concave portion 16 by performing a cutting process on one axial end surface 15 of the hub 11. By simply cutting the one end surface 15 in the axial direction of the hub 11 as described above, the inner peripheral surface of the convex portion 17 is an extension of the inner peripheral surface (tapered surface 14) of the hub 11 and the inner peripheral surface of the hub 11 Since the projection 17 does not have an angle with respect to the outer peripheral surface of the mounting member 51, the projection 17 cannot be used as a weir-shaped seal or a lip-shaped seal. Therefore, in addition to the cutting process, the convex portion 17 is plastically deformed by obliquely pressing or drawing the radially inwardly of the convex portion 17, thereby forming the convex portion 17 into a lip shape. Contact the outer peripheral surface of the mounting member 51 as a weir-shaped seal or a lip-shaped seal.

尚、上記したようにハブ１１の内周面にはテーパー面１４が設けられているので、凸部１７の内周面に設けるテーパー部１８はその傾斜角度θ１をハブ１１の内周面に設けるテーパー面１４の傾斜角度θ２より大きく形成し（θ１＞θ２）、これにより凸部１７が堰状シールないしリップ状シールとして装着部材５１の外周面に接触するようにする。 Since the tapered surface 14 is provided on the inner peripheral surface of the hub 11 as described above, the taper portion 18 provided on the inner peripheral surface of the convex portion 17 has its inclination angle θ 1 set to the inner peripheral surface of the hub 11. The inclination angle θ 2 of the provided tapered surface 14 is formed to be larger than the inclination angle θ 2 (θ 1 > θ 2 ), so that the convex portion 17 comes into contact with the outer peripheral surface of the mounting member 51 as a weir-like seal or lip-like seal.

上記構成のシール機構によれば、ハブ１１の軸方向一方の端面１５に環状の凹部１６が設けられることによりこの凹部１６の内周側に環状の凸部１７が設けられ、凸部１７の内周面に凸部先端１７ａへ向けて内径寸法が徐々に縮小する向きのテーパー部１８が設けられているため、この凸部１７が圧油に対する堰状シールないしリップ状シールとして作動し、圧油をシールすることが可能とされる。したがって圧油が多量に漏洩するのを抑制することができ、これによりハブ１１の拡径量が不足して油圧嵌めが円滑に行われなかったり、或いは漏洩した圧油がダイアフラム３１等の周辺部品を汚損したりするのを抑制することができる。   According to the sealing mechanism having the above-described configuration, the annular concave portion 16 is provided on one end surface 15 of the hub 11 in the axial direction, so that the annular convex portion 17 is provided on the inner peripheral side of the concave portion 16. Since the tapered portion 18 is provided on the peripheral surface so that the inner diameter gradually decreases toward the tip 17a of the convex portion, the convex portion 17 operates as a weir-shaped seal or a lip-shaped seal against pressure oil, Can be sealed. Therefore, it is possible to suppress a large amount of pressure oil from leaking, whereby the amount of expansion of the hub 11 is insufficient, so that the hydraulic fitting is not smoothly performed, or the leaked pressure oil is reduced to peripheral parts such as the diaphragm 31. Can be suppressed.

また、圧油をシールするには装着部材５１とハブ１１との間にＯリング等のシール専用部品を介装することが考えられるが、この場合には、シール専用部品の組み付けに手間がかかったり、シール専用部品が油と接触することにより早期に劣化したりする不都合が生じることがある。これに対し上記構成のシール機構によればシール専用部品を用いることなくシール作用を発揮するため、上記不都合が生じるのを未然に防止することができる。   In order to seal the pressure oil, it is conceivable to interpose a sealing-only part such as an O-ring between the mounting member 51 and the hub 11, but in this case, assembling of the sealing-only part takes time. In some cases, the seal-dedicated parts may be deteriorated early due to contact with oil. On the other hand, according to the sealing mechanism having the above-described structure, the sealing function is exerted without using a sealing-dedicated component, so that the inconvenience can be prevented from occurring.

本発明において、凸部１７の断面形状は、凸部１７の内周面の少なくとも一部に凸部先端１７ａへ向けて内径寸法が徐々に縮小する向きのテーパー部１８を備えるものであれば、とくに限定されない。   In the present invention, if the cross-sectional shape of the convex portion 17 is such that at least a part of the inner peripheral surface of the convex portion 17 is provided with a tapered portion 18 whose inner diameter dimension gradually decreases toward the convex portion tip 17a, It is not particularly limited.

すなわち上記図２の例では、凸部１７の内周面の全長に亙ってテーパー部１８が設けられているが、凸部１７の内周面の一部のみにテーパー部１８が設けられていても良い。   That is, in the example of FIG. 2 described above, the tapered portion 18 is provided over the entire length of the inner peripheral surface of the convex portion 17, but the tapered portion 18 is provided only on a part of the inner peripheral surface of the convex portion 17. May be.

図３ではその一例として、凸部１７の軸方向中間位置に折り曲がった形状の折り曲げ部１７ｂが設けられ、凸部１７の根元部１７ｃから折り曲げ部１７ｂへかけての内周面にテーパー部１８が設けられ、折り曲げ部１７ｂから凸部先端１７ａへかけての内周面に内径寸法が徐々に拡大する向きの先端テーパー部（逆テーパー部）２０が設けられた形状とされている。   In FIG. 3, as an example, a bent portion 17 b having a bent shape is provided at an intermediate position in the axial direction of the convex portion 17, and a tapered portion 18 is formed on the inner peripheral surface from the base portion 17 c to the bent portion 17 b of the convex portion 17. The inner peripheral surface from the bent portion 17b to the protruding portion tip 17a is provided with a tip tapered portion (reverse tapered portion) 20 whose inner diameter dimension gradually increases.

また、上記実施の形態では、ハブ１１の軸方向一方の端部に凸部１７によるシール機構が設けられているが、ハブ１１の軸方向他方の端部に凸部によるシール機構を設けるようにしても良い。   Further, in the above-described embodiment, the seal mechanism by the convex portion 17 is provided at one end in the axial direction of the hub 11, but the seal mechanism by the convex portion is provided at the other end in the axial direction of the hub 11. May be.

図４ではその一例として、ハブ１１の軸方向他方の端面２１に環状の凹部２２が設けられ、これによりこの凹部２２の内周側に環状の凸部２３が設けられている。凸部２３はその内周面に、凸部先端２３ａへ向けて内径寸法が徐々に縮小する向きのテーパー部２４が設けられるとともに、その外周面にも同じ方向に傾斜するテーパー部２５が設けられており、これにより凸部２３はその全体がリップ状とされ、凸部先端２３ａが装着部材５１の外周面に接触することにより圧油に対してシール作用を発揮する堰状シールないしリップ状シールとして作動することが可能とされている。   In FIG. 4, as one example, an annular concave portion 22 is provided on the other end surface 21 in the axial direction of the hub 11, whereby an annular convex portion 23 is provided on the inner peripheral side of the concave portion 22. The convex portion 23 is provided on its inner peripheral surface with a tapered portion 24 in which the inner diameter dimension gradually decreases toward the convex portion tip 23a, and on the outer peripheral surface thereof, a tapered portion 25 inclined in the same direction is provided. As a result, the convex portion 23 has a lip shape as a whole, and a weir-shaped seal or a lip-shaped seal that exerts a sealing action against pressure oil when the convex portion tip 23a contacts the outer peripheral surface of the mounting member 51. It is possible to operate as.

尚、この場合、図５に示すように、凸部２３の外周面は、軸方向にストレートな円筒面２６として形成されても良い。   In this case, as shown in FIG. 5, the outer peripheral surface of the projection 23 may be formed as a cylindrical surface 26 that is straight in the axial direction.

更にまた、上記のように塑性変形される凸部１７，２３は、装着部材５１の外周面に接触することなく、装着部材５１の外周面との間に微小な径方向間隙を形成する非接触式のシールを形成するものとしても良い。また、凸部先端２３ａが係合可能な環状の溝や段差部、端面部などを装着部材５１の外周面に設けることも考えられる。   Furthermore, the convex portions 17 and 23 that are plastically deformed as described above do not come into contact with the outer peripheral surface of the mounting member 51, but form a small radial gap with the outer peripheral surface of the mounting member 51. A seal of a type may be formed. It is also conceivable to provide an annular groove, a stepped portion, an end surface, or the like, with which the protrusion tip 23a can be engaged on the outer peripheral surface of the mounting member 51.

１ ダイアフラムカップリング
１１ ハブ
１２ ハブ本体
１３ フランジ部
１４，５４ テーパー面
１５，２１ 端面
１６，２２ 凹部
１７，２３ 凸部
１７ａ 凸部先端
１７ｂ 折り曲げ部
１７ｃ 凸部根元部
１８，１９，２４，２５ テーパー部
２６ 円筒面
２０ 先端テーパー部
３１ ダイアフラム
４１ センターチューブ
５１ 装着部材
５５ 圧油供給路 DESCRIPTION OF SYMBOLS 1 Diaphragm coupling 11 Hub 12 Hub main body 13 Flange part 14, 54 Tapered surface 15, 21 End surface 16, 22 Concave part 17, 23 Convex part 17a Convex tip 17b Bend part 17c Convex base part 18, 19, 24, 25 Taper Part 26 Cylindrical surface 20 Tip taper part 31 Diaphragm 41 Center tube 51 Mounting member 55 Pressure oil supply path

Claims (4)

装着部材と前記装着部材の外周側に油圧嵌めするハブとの間に供給する圧油の漏洩を抑制するシール機構であって、
前記ハブの端面に環状の凹部を設けることにより前記凹部の内周側に設けられた環状の凸部を備え、
前記凸部は、その内周面の少なくとも一部に、凸部先端へ向けて内径寸法が徐々に縮小する向きのテーパー部を備えることを特徴とする油圧嵌め用ハブのシール機構。 A seal mechanism that suppresses leakage of pressurized oil supplied between a mounting member and a hub that is hydraulically fitted to an outer peripheral side of the mounting member,
An annular convex portion provided on the inner peripheral side of the concave portion by providing an annular concave portion on the end surface of the hub,
A seal mechanism for a hydraulic fitting hub, characterized in that the convex portion has a tapered portion on at least a part of an inner peripheral surface thereof, the inner diameter of the convex portion gradually decreasing toward the distal end of the convex portion. 請求項１記載のシール機構において、
前記凸部は、その内周面の全長に亙って前記テーパー部を備えることを特徴とする油圧嵌め用ハブのシール機構。 The seal mechanism according to claim 1,
The sealing mechanism for a hydraulic fitting hub, wherein the convex portion includes the tapered portion over the entire length of an inner peripheral surface thereof. 請求項１記載のシール機構において、
前記凸部は、その軸方向中間位置に折り曲げ部を備え、
前記凸部の根元部から前記折り曲げ部へかけて前記テーパー部が設けられ、
前記折り曲げ部から凸部先端へかけて内径寸法が徐々に拡大する向きの先端テーパー部が設けられていることを特徴とする油圧嵌め用ハブのシール機構。 The seal mechanism according to claim 1,
The protrusion has a bent portion at an intermediate position in the axial direction,
The tapered portion is provided from a root portion of the convex portion to the bent portion,
A sealing mechanism for a hydraulic fitting hub, wherein a tip taper portion is provided in a direction in which an inner diameter dimension gradually increases from the bent portion to the tip of the convex portion. 請求項１乃至３の何れかに記載のシール機構において、
前記ハブは、ダイアフラムを介してセンターチューブに連結されるダイアフラムカップリング用ハブとして用いられることを特徴とする油圧嵌め用ハブのシール機構。 The seal mechanism according to any one of claims 1 to 3,
A seal mechanism for a hydraulic fitting hub, wherein the hub is used as a diaphragm coupling hub connected to a center tube via a diaphragm.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114458697A (en) * 2022-02-16 2022-05-10 九江市畅球传动机械有限公司 Novel hydraulic expansion sleeve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6327723U (en) * 1986-08-08 1988-02-23
WO2011101937A1 (en) * 2010-02-18 2011-08-25 三菱重工業株式会社 Taper coupling structure and rotating machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6327723U (en) * 1986-08-08 1988-02-23
WO2011101937A1 (en) * 2010-02-18 2011-08-25 三菱重工業株式会社 Taper coupling structure and rotating machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114458697A (en) * 2022-02-16 2022-05-10 九江市畅球传动机械有限公司 Novel hydraulic expansion sleeve

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