JP2005207512A - Reinforcing ring for oil seal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing ring 2 for an oil seal capable of preventing two reinforcing rings from sticking to each other at the time of adhering process and increasing the strength of the rings 2 in plane form. <P>SOLUTION: The reinforcing ring 2 for the oil seal formed in plane shape from a metal plate comprises a projection 5 provided on the plane part in such an arrangement as facing one side in the axial direction, and an overhang 7 provided at the peripheral edge of the reinforcing ring 2 in such an arrangement as facing the other side in the axial direction oppositely to the projection 5, wherein the the projection 5 is directed to one side in the axial direction while the overhang 7 in cylindrical shape is directed to the other side in the axial direction being provided at one of the outside edge part 6a and the inside edge part 6b of the reinforcing ring 2, and the other circumferential edge is furnished with an overhang 8 in a slope shape directed alike to the other side in the axial direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、密封装置の一種であるオイルシールの一構成要素をなすオイルシール用補強環に関するものである。   The present invention relates to an oil seal reinforcing ring that constitutes one component of an oil seal that is a kind of a sealing device.

従来から、図３（Ａ）に示すように、金属板によって平面状に形成された補強環２にゴム状弾性材製のシール部３を加硫接着してなるオイルシール１が知られており、平面状の補強環２には、その強度を増大させるために、その平面部４に突起部５が設けられるとともにその周縁部６に張り出し部７が設けられている（特許文献１参照）。   Conventionally, as shown in FIG. 3 (A), an oil seal 1 is known in which a rubber-like elastic seal portion 3 is vulcanized and bonded to a reinforcing ring 2 formed in a planar shape by a metal plate. In order to increase the strength of the planar reinforcing ring 2, a projection 5 is provided on the plane 4 and an overhang 7 is provided on the peripheral edge 6 (see Patent Document 1).

しかしながら、この従来技術によると、図示したように補強環２の平面部４に設けられた突起部５と、周縁部６に設けられた張り出し部７とが共に同じ軸方向一方（図上左方）へ向けて設けられているために、以下のような不都合がある。   However, according to this prior art, as shown in the drawing, the protrusion 5 provided on the flat surface portion 4 of the reinforcing ring 2 and the overhanging portion 7 provided on the peripheral edge 6 are both in the same axial direction (left side in the figure). ), There are the following inconveniences.

すなわち、上記オイルシール１の製造時、補強環２にシール部３を加硫接着するに際しては、補強環２に接着剤を塗布する工程が実施され、この工程は、多数の補強環２を纏めて接着剤槽に浸漬することにより行なわれる。したがってこのとき、図３（Ｂ）に示すように２枚の補強環２，２がたまたま平面部４，４同士を密着させるようにして背中合わせで重ね合わされると、この状態のまま補強環２，２同士が粘着してしまい、粘着してしまうといちいち手作業で粘着状態を解消しなければならないことから、その後の工程を円滑に行なうことができなくなる。   That is, at the time of manufacturing the oil seal 1, when the seal portion 3 is vulcanized and bonded to the reinforcing ring 2, a step of applying an adhesive to the reinforcing ring 2 is performed. Then, it is performed by immersing in an adhesive tank. Therefore, at this time, as shown in FIG. 3 (B), when the two reinforcing rings 2, 2 happen to be overlapped back to back so that the flat portions 4, 4 are in close contact with each other, the reinforcing rings 2, 2 remain in this state. Since the two stick to each other and stick to each other, the sticking state must be canceled manually, so that subsequent steps cannot be performed smoothly.

実開昭６３−８４２１号公報Japanese Utility Model Publication No. 63-8421

本発明は以上の点に鑑みて、接着処理時に補強環同士が粘着するのを有効に防止することができ、しかも平面状の補強環の強度を増大させることもできるオイルシール用補強環を提供することを目的とする。   In view of the above, the present invention provides an oil seal reinforcing ring that can effectively prevent the reinforcing rings from sticking to each other during the bonding process and can also increase the strength of the planar reinforcing ring. The purpose is to do.

上記目的を達成するため、本発明の請求項１による補強環は、金属板によって平面状に形成されたオイルシール用補強環において、当該補強環の平面部に軸方向一方へ向けて突起部を設け、当該補強環の周縁部に軸方向他方へ向けて張り出し部を設けたことを特徴するものである。   In order to achieve the above object, a reinforcing ring according to a first aspect of the present invention is an oil seal reinforcing ring formed in a planar shape by a metal plate, and a protrusion is provided on the flat portion of the reinforcing ring toward one axial direction. And a protruding portion is provided on the peripheral edge of the reinforcing ring toward the other side in the axial direction.

また、本発明の請求項２による補強環は、金属板によって平面状に形成されたオイルシール用補強環において、当該補強環の平面部に軸方向一方へ向けて突起部を設け、当該補強環の外周縁部および内周縁部のうち一方の周縁部に軸方向他方へ向けて筒状の張り出し部を設け、他方の周縁部に同じく軸方向他方へ向けて傾斜面状の張り出し部を設けたことを特徴するものである。   The reinforcing ring according to claim 2 of the present invention is a reinforcing ring for oil seal formed in a planar shape by a metal plate, and a protruding portion is provided on the flat portion of the reinforcing ring toward the one side in the axial direction. A cylindrical projecting portion is provided on one of the outer peripheral edge portion and the inner peripheral edge portion toward the other in the axial direction, and an inclined surface-like projecting portion is provided on the other peripheral edge portion in the same direction in the other axial direction. It is characterized by that.

また、本発明の請求項３による補強環は、上記した請求項２のオイルシール用補強環において、傾斜面状の張り出し部は、筒状の張り出し部よりも軸方向幅が小さく形成されていることを特徴とするものである。   The reinforcing ring according to claim 3 of the present invention is the oil seal reinforcing ring according to claim 2 described above, wherein the inclined surface-shaped protruding portion is formed to have a smaller axial width than the cylindrical protruding portion. It is characterized by this.

上記構成を備えた本発明の請求項１または２による補強環のように、補強環の平面部に軸方向一方へ向けて突起部を設けるとともに補強環の周縁部に軸方向他方へ向けて張り出し部を設けると、２枚の補強環が重ね合わされたときにこの２枚の補強環は、突起部同士、張り出し部同士、または一方の張り出し部と他方の平面部とを接触させるようにして重ね合わされことになり、従来のように平面部同士を密着させるようにして重ね合わされるのが防止される。   As in the reinforcing ring according to claim 1 or 2 of the present invention having the above-described configuration, a protrusion is provided on the flat portion of the reinforcing ring toward one side in the axial direction, and the peripheral portion of the reinforcing ring extends toward the other side in the axial direction. When the two reinforcing rings are overlapped, the two reinforcing rings are overlapped so that the protruding portions, the protruding portions, or one protruding portion and the other flat portion are brought into contact with each other. As a result, it is possible to prevent the planar portions from being overlapped with each other as in the conventional case.

また併せて、上記構成を備えた本発明の請求項２による補強環のように、補強環の外周縁部および内周縁部のうち一方の周縁部に軸方向他方へ向けて筒状の張り出し部を設けるとともに他方の周縁部に同じく軸方向他方へ向けて傾斜面状の張り出し部を設けると、当該補強環はその外周縁部から内周縁部まで遍く立体化されることになり、よって当該補強環の強度が外周縁部から内周縁部まで遍く増大される。尚、この構成において、一方の張り出し部の形状を筒状とするとともに他方の張り出し部の形状を傾斜面状としたのは、一方の筒状の張り出し部をもって当該補強環ないしオイルシールをハウジング等に取り付けるとともに、他方の傾斜面状の張り出し部をもって当該補強環に加硫接着されるゴム状弾性材製のシール部（特にシールリップ）をバックアップするためである。実施の形態としては、補強環の外周縁部に筒状の張り出し部を設けるとともに内周縁部に傾斜面状の張り出し部を設ける場合と、反対に補強環の外周縁部に傾斜面状の張り出し部を設けるとともに内周縁部に筒状の張り出し部を設ける場合とがある。   In addition, like the reinforcing ring according to claim 2 of the present invention having the above-described configuration, a cylindrical projecting portion toward the other in the axial direction on one peripheral edge of the outer peripheral edge and the inner peripheral edge of the reinforcing ring. And the other peripheral edge portion is provided with an inclined surface-like overhanging portion toward the other in the axial direction, the reinforcing ring is uniformly three-dimensionalized from the outer peripheral edge portion to the inner peripheral edge portion. The strength of the ring is increased uniformly from the outer periphery to the inner periphery. In this configuration, the shape of one of the overhanging portions is cylindrical and the shape of the other overhanging portion is an inclined surface. This is for backing up a seal portion (particularly, a seal lip) made of a rubber-like elastic material that is vulcanized and bonded to the reinforcing ring with the other inclined surface-like overhang portion. As an embodiment, a cylindrical overhang is provided on the outer peripheral edge of the reinforcing ring and an inclined surface overhang is provided on the inner peripheral edge. On the contrary, an inclined surface overhang is formed on the outer peripheral edge of the reinforcing ring. In some cases, a cylindrical projecting portion is provided on the inner peripheral edge portion.

更にまた、これに加えて上記構成を備えた本発明の請求項３による補強環のように、傾斜面状の張り出し部の軸方向幅を筒状の張り出し部の軸方向幅よりも小さく形成すると、２枚の補強環が双方の筒状の突起部同士を接触させるようにして重ね合わされたときに、双方の傾斜面状の突起部同士の間にクリアランスが形成される。したがって、このように２枚の補強環の間にクリアランスが形成されることにより、２枚の補強環がいわゆる真空吸着するのが防止される。   Furthermore, in addition to this, as in the reinforcing ring according to claim 3 of the present invention having the above-described configuration, the axial width of the inclined surface-like overhanging portion is made smaller than the axial width of the tubular overhanging portion. When the two reinforcing rings are overlapped so that both cylindrical projections are brought into contact with each other, a clearance is formed between the two inclined projections. Therefore, the clearance is formed between the two reinforcing rings in this way, so that the two reinforcing rings are prevented from so-called vacuum adsorption.

本発明は、以下の効果を奏する。   The present invention has the following effects.

すなわち、本発明の請求項１または２による補強環においては、補強環の平面部に軸方向一方へ向けて突起部を設けるとともに補強環の周縁部に軸方向他方へ向けて張り出し部を設けるようにしたために、２枚の補強環が重ね合わされたときにこの２枚の補強環は、突起部同士、張り出し部同士、または一方の張り出し部と他方の平面部とを接触させるようにして重ね合わされ、従来のように平面部同士を密着させることがない。したがって、平面部同士が密着して粘着してしまうのを有効に防止することができ、しかも突起部および張り出し部を有することによって平面状の補強環の強度を増大させることができる。   That is, in the reinforcing ring according to claim 1 or 2 of the present invention, the projection is provided on the flat portion of the reinforcing ring toward one side in the axial direction, and the protruding portion is provided on the peripheral portion of the reinforcing ring toward the other side in the axial direction. Therefore, when the two reinforcing rings are overlapped, the two reinforcing rings are overlapped so that the protruding portions, the protruding portions, or one protruding portion and the other flat portion are brought into contact with each other. The flat portions are not brought into close contact with each other as in the prior art. Therefore, it is possible to effectively prevent the flat portions from sticking to each other and sticking together, and the strength of the flat reinforcing ring can be increased by having the protrusions and the protruding portions.

また併せて、本発明の請求項２による補強環においては、補強環の外周縁部および内周縁部のうち一方の周縁部に軸方向他方へ向けて筒状の張り出し部を設けるとともに他方の周縁部に同じく軸方向他方へ向けて傾斜面状の張り出し部を設けるようにしたために、補強環はその外周縁部から内周縁部まで遍く立体化される。したがって、補強環の強度を外周縁部から内周縁部まで遍く増大させることができる。   In addition, in the reinforcing ring according to claim 2 of the present invention, a cylindrical projecting portion is provided on one of the outer peripheral edge and inner peripheral edge of the reinforcing ring toward the other in the axial direction, and the other peripheral edge. Since the inclined surface-like projecting portion is provided in the same direction toward the other side in the axial direction, the reinforcing ring is uniformly three-dimensionalized from the outer peripheral edge to the inner peripheral edge. Therefore, the strength of the reinforcing ring can be increased uniformly from the outer peripheral edge to the inner peripheral edge.

更にまた、これに加えて本発明の請求項３による補強環においては、傾斜面状の張り出し部の軸方向幅を筒状の張り出し部の軸方向幅よりも小さく形成するようにしたために、２枚の補強環が双方の筒状の突起部同士を接触させるようにして重ね合わされると、双方の傾斜面状の突起部同士の間にはクリアランスが形成される。したがって、２枚の補強環がいわゆる真空吸着により粘着してしまうのを有効に防止することができる。   Furthermore, in addition to this, in the reinforcing ring according to claim 3 of the present invention, since the axial width of the inclined projecting portion is formed smaller than the axial width of the cylindrical projecting portion, 2 When the reinforcing rings of the sheets are overlapped with each other so that both cylindrical projections are brought into contact with each other, a clearance is formed between the two inclined projections. Therefore, it is possible to effectively prevent the two reinforcing rings from sticking due to so-called vacuum adsorption.

つぎに本発明の実施例を図面にしたがって説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

図１（Ａ）は、本発明の実施例に係るオイルシール用補強環２の半裁正面図を示しており、そのＡ−Ａ線断面図が同図（Ｂ）に示されている。   FIG. 1 (A) shows a half-cut front view of an oil seal reinforcing ring 2 according to an embodiment of the present invention, and a cross-sectional view taken along line A-A is shown in FIG. 1 (B).

当該実施例に係る補強環２は、フラットベアリングシール等として用いられるオイルシールにその一構成要素として用いられるものであって、以下のように構成されている。   The reinforcing ring 2 according to this embodiment is used as one component of an oil seal used as a flat bearing seal or the like, and is configured as follows.

すなわち、当該補強環２は、金属板によって平面状に形成され、その表面にゴム状弾性材製のシール部（図示せず）を加硫接着するものであって、その強度を増大させるために、その平面部４に軸方向一方（図１（Ｂ）において左方）へ向けて突起部５が設けられており、その外周縁部６ａに軸方向他方（図１（Ｂ）において右方）へ向けて筒状の張り出し部７が設けられており、更にその内周縁部６ｂに同じく軸方向他方へ向けて傾斜面状の張り出し部８が設けられている。補強環２の板厚は、０．１〜１ｍｍ程度が一般的であり、突起部５および張り出し部７，８は何れもプレス加工などによって形成されている。   That is, the reinforcing ring 2 is formed by a metal plate in a planar shape, and a rubber-like elastic seal part (not shown) is vulcanized and bonded to the surface of the reinforcing ring 2 in order to increase its strength. The flat portion 4 is provided with a protruding portion 5 toward one side in the axial direction (leftward in FIG. 1B), and the other axial direction on the outer peripheral edge portion 6a (rightward in FIG. 1B). A tubular projecting portion 7 is provided toward the end, and an inclined surface-shaped projecting portion 8 is provided on the inner peripheral edge 6b in the same manner toward the other in the axial direction. The plate thickness of the reinforcing ring 2 is generally about 0.1 to 1 mm, and both the protruding portion 5 and the overhang portions 7 and 8 are formed by pressing or the like.

上記突起部５は、環状に形成されており、その頂部には平坦面部９が形成されている。また、突起部５は上記したようにプレス加工により形成されるので、突起部５の断面形状は山なり状に盛り上がっており、突起部５の裏面側には対応して凹部１０が形成されている。突起部５の高さ寸法ｈは、０．２ｍｍ〜板厚５０％程度が好適である。   The protrusion 5 is formed in an annular shape, and a flat surface portion 9 is formed on the top. Further, since the protrusion 5 is formed by pressing as described above, the cross-sectional shape of the protrusion 5 is raised in a mountain shape, and a corresponding recess 10 is formed on the back side of the protrusion 5. Yes. The height h of the protrusion 5 is preferably about 0.2 mm to about 50% of the plate thickness.

上記筒状の張り出し部７は、補強環２の外周縁部６ａから軸方向他方へ向けて円筒状に形成されており、上記傾斜面状の張り出し部８は、補強環２の内周縁部６ｂから斜め内径方向へ向けて環状のテーパー面状に形成されている。また、この傾斜面状の張り出し部８の軸方向幅ｗ_１は、筒状の張り出し部７の軸方向幅ｗ_２よりも小さく形成されている（ｗ_１＜ｗ_２）。 The tubular projecting portion 7 is formed in a cylindrical shape from the outer peripheral edge 6 a of the reinforcing ring 2 toward the other axial direction, and the inclined projecting portion 8 is the inner peripheral edge 6 b of the reinforcing ring 2. Is formed in the shape of an annular tapered surface toward the oblique inner diameter direction. Further, the axial width w ₁ of the inclined projecting portion 8 is formed to be smaller than the axial width w ₂ of the tubular projecting portion 7 (w ₁ <w ₂ ).

上記構成の補強環２においては、その平面部４に軸方向一方へ向けて突起部５が設けられるとともに外周縁部６ａに軸方向他方へ向けて筒状の張り出し部７が設けられているために、接着処理時に２枚の補強環２，２が重ね合わされると、この２枚の補強環２，２は、突起部５，５同士、張り出し７，７部同士、または一方の張り出し部７と他方の平面部４とが接触するように重ね合わされ、従来のように平面部４，４同士が密着することがない。したがって、平面部４，４同士が密着して補強環２，２同士が粘着してしまうのを防止することができる。   In the reinforcing ring 2 having the above-described configuration, the flat portion 4 is provided with the protruding portion 5 toward the one axial direction, and the outer peripheral edge portion 6a is provided with the tubular projecting portion 7 toward the other axial direction. In addition, when the two reinforcing rings 2 and 2 are overlapped at the time of the bonding process, the two reinforcing rings 2 and 2 are connected to the protruding portions 5 and 5, the protruding portions 7 and 7, or one of the protruding portions 7. And the other flat portion 4 are brought into contact with each other, and the flat portions 4 and 4 are not in close contact with each other as in the prior art. Therefore, it can prevent that the plane parts 4 and 4 contact | adhere and the reinforcement rings 2 and 2 adhere.

また、傾斜面状の張り出し部８の軸方向幅ｗ_１が筒状の張り出し部７の軸方向幅ｗ_２よりも小さく形成されているために、２枚の補強環２，２が双方の筒状の突起部７，７同士を接触させるようにして重ね合わされると、双方の傾斜面状の突起部８，８同士の間にはクリアランス（図示せず）が形成される。したがって補強環２，２同士がいわゆる真空吸着により粘着してしまうのを防止することができる。 Further, since the axial width w _{1 of} the inclined projecting portion 8 is formed to be smaller than the axial width w ₂ of the tubular projecting portion 7, the two reinforcing rings 2 and 2 are formed on both cylinders. When the projections 7 and 7 are overlapped so as to be in contact with each other, a clearance (not shown) is formed between the projections 8 and 8 having both inclined surfaces. Therefore, it is possible to prevent the reinforcing rings 2 and 2 from sticking to each other by so-called vacuum adsorption.

また、上記構成の補強環２においては併せて、補強環２の外周縁部６ａに筒状の張り出し部７が設けられるとともに内周縁部６ｂに傾斜面状の張り出し部８が設けられ、その間には突起部５も設けられているために、補強環２は外周縁部６ａから内周縁部６ｂまで遍く立体化されている。したがって、補強環２の強度を外周縁部６ａから内周縁部６ｂまで遍く増大させることができる。   In addition, in the reinforcing ring 2 having the above-described configuration, a cylindrical projecting portion 7 is provided on the outer peripheral edge portion 6a of the reinforcing ring 2 and an inclined surface-like projecting portion 8 is provided on the inner peripheral edge portion 6b. Since the protrusion 5 is also provided, the reinforcing ring 2 is uniformly three-dimensionalized from the outer peripheral edge 6a to the inner peripheral edge 6b. Therefore, the strength of the reinforcing ring 2 can be increased uniformly from the outer peripheral edge 6a to the inner peripheral edge 6b.

したがって以上のことから、所期の目的どおり、接着処理時に補強環２，２同士が粘着するのを有効に防止することができ、しかも平面状の補強環２の強度を増大させることができるオイルシール用補強環２を提供することができる。   Therefore, as described above, the oil that can effectively prevent the reinforcing rings 2 and 2 from sticking to each other during the bonding process and can increase the strength of the planar reinforcing ring 2 as intended. The reinforcing ring 2 for sealing can be provided.

尚、上記実施例に係る補強環２は、本発明の技術的範疇においてその形状や構造等を種々変更することが可能である。例えば、突起部５は、上記実施例では全周に亙って環状に形成されているが、図２に示すように、複数の突起部５を円周上に並べて設けても良い。図では、突起部５が８箇所等配状に設けられている。   In addition, the shape, structure, etc. of the reinforcing ring 2 according to the above embodiment can be variously changed within the technical scope of the present invention. For example, although the protrusion 5 is formed in an annular shape over the entire circumference in the above embodiment, a plurality of protrusions 5 may be arranged on the circumference as shown in FIG. In the figure, the protrusions 5 are provided in a uniform manner at eight places.

（Ａ）は本発明の実施例に係る補強環の半裁正面図、（Ｂ）は同図（Ａ）におけるＡ−Ａ線断面図であって同補強環の断面図(A) is a half cut front view of a reinforcing ring according to an embodiment of the present invention, (B) is a cross-sectional view taken along line AA in FIG. （Ａ）は本発明の他の実施例に係る補強環の半裁正面図、（Ｂ）は同図（Ａ）におけるＢ−Ｂ線断面図であって同補強環の断面図(A) is a half-cut front view of a reinforcing ring according to another embodiment of the present invention, (B) is a cross-sectional view taken along line BB in FIG. （Ａ）は従来例に係る補強環を備えたオイルシールの断面図、（Ｂ）は２枚の補強環が粘着した状態を示す断面図(A) is sectional drawing of the oil seal provided with the reinforcement ring which concerns on a prior art example, (B) is sectional drawing which shows the state which two reinforcement rings adhered

符号の説明Explanation of symbols

１ オイルシール
２ 補強環
３ シール部
４ 平面部
５ 突起部
６ 周縁部
６ａ 外周縁部
６ｂ 内周縁部
７ 筒状の張り出し部
８ 傾斜面状の張り出し部
９ 平坦面部
１０ 凹部 DESCRIPTION OF SYMBOLS 1 Oil seal 2 Reinforcement ring 3 Seal part 4 Plane part 5 Projection part 6 Peripheral part 6a Outer peripheral part 6b Inner peripheral part 7 Cylindrical projecting part 8 Sloped projecting part 9 Flat surface part 10 Concave part

Claims (3)

金属板によって平面状に形成されたオイルシール用補強環（２）において、
当該補強環（２）の平面部に軸方向一方へ向けて突起部（５）を設け、当該補強環（２）の周縁部に軸方向他方へ向けて張り出し部（７）を設けたことを特徴するオイルシール用補強環。 In the reinforcing ring for oil seal (2) formed flat by a metal plate,
Protruding part (5) is provided on the flat part of the reinforcing ring (2) toward one side in the axial direction, and the projecting part (7) is provided on the peripheral part of the reinforcing ring (2) toward the other side in the axial direction. The characteristic oil seal reinforcement ring. 金属板によって平面状に形成されたオイルシール用補強環（２）において、
当該補強環（２）の平面部（４）に軸方向一方へ向けて突起部（５）を設け、当該補強環（２）の外周縁部（６ａ）および内周縁部（６ｂ）のうち一方の周縁部に軸方向他方へ向けて筒状の張り出し部（７）を設け、他方の周縁部に同じく軸方向他方へ向けて傾斜面状の張り出し部（８）を設けたことを特徴するオイルシール用補強環。 In the reinforcing ring for oil seal (2) formed flat by a metal plate,
A projection (5) is provided on the flat surface (4) of the reinforcing ring (2) in one axial direction, and one of the outer peripheral edge (6a) and the inner peripheral edge (6b) of the reinforcing ring (2). An oil is characterized in that a cylindrical projecting portion (7) is provided on the other peripheral portion in the axial direction and an inclined projecting portion (8) is provided on the other peripheral portion in the same axial direction. Reinforcing ring for seal. 請求項２のオイルシール用補強環において、
傾斜面状の張り出し部（８）は、筒状の張り出し部（７）よりも軸方向幅が小さく形成されていることを特徴とするオイルシール用補強環。 The reinforcing ring for oil seal according to claim 2,
The inclined ring-shaped overhanging portion (8) has an axial width smaller than that of the tubular overhanging portion (7).

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