Bearing sealing device
US-2017284471-A1 · Oct 5, 2017 · US
Rotary seal
US2020003260A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020003260-A1 |
| Application number | US-201916449369-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 22, 2019 |
| Priority date | Jun 29, 2018 |
| Publication date | Jan 2, 2020 |
| Grant date | — |
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- Title
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- Abstract
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- Assignees and inventors
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- Key dates
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A radial gap between an outer circumferential surface of an encoder member joined to an outward flange portion of a slinger and an inner circumferential surface of a seal body includes a first gap portion and a second gap portion closer to an inward flange portion of a core metal than the first gap portion is. The outer circumferential surface that defines the first gap portion is a cylindrical outer circumferential surface, and the radial gap in the first gap portion is substantially constant in an axial direction. The outer circumferential surface that defines the second gap portion is a conical outer circumferential surface reduced in diameter as approaching the inward flange portion of the core metal in the axial direction, and the radial gap in the second gap portion is gradually increased as approaching the inward flange portion of the core metal in the axial direction.
First claim
Opening claim text (preview).
What is claimed is: 1 . A rotary seal comprising: a slinger attached to an inner diameter-side member; a core metal attached to an outer diameter-side member; and a seal body including a seal member joined to the core metal, wherein the slinger includes a slinger-cylindrical portion fitted to an outside of the inner diameter-side member and an outward flange portion extending radially outward from an end of the slinger-cylindrical portion in a direction parallel to an axial direction along a rotary shaft of the inner diameter-side member, the core metal includes a core-metal cylindrical portion fitted to an inside of the outer diameter-side member and an inward flange portion extending radially inward from an end of the core-metal cylindrical portion in a direction parallel to the axial direction, the seal member includes an axial lip brought into sliding contact with the outward flange portion of the slinger, a radial gap between an inner circumferential surface of the seal body and an outer circumferential surface of a joined member joined to the outward flange portion of the slinger includes a first gap portion and a second gap portion closer to the inward flange portion of the core metal than the first gap portion is, the outer circumferential surface that defines the first gap portion is a cylindrical or substantially cylindrical outer circumferential surface, the radial gap in the first gap portion is substantially constant in a direction parallel to the axial direction, the outer circumferential surface that defines the second gap portion is a conical or substantially conical outer circumferential surface, which is reduced in diameter as approaching the inward flange portion of the core metal in a direction parallel to the axial direction, and the radial gap in the second gap portion is gradually increased as approaching the inward flange portion of the core metal in a direction parallel to the axial direction. 2 . The rotary seal according to claim 1 , wherein the joined member includes an encoder member, a synthetic resin member, or a synthetic rubber member. 3 . A rotary seal comprising: a slinger attached to an inner diameter-side member; a core metal attached to an outer diameter-side member; and a seal body including a seal member joined to the core metal, wherein the slinger includes a slinger-cylindrical portion fitted to an outside of the inner diameter-side member and an outward flange portion extending radially outward from an end of the slinger-cylindrical portion in a direction parallel to an axial direction along a rotary shaft of the inner diameter-side member, the core metal includes a core-metal cylindrical portion fitted to an inside of the outer diameter-side member and an inward flange portion extending radially inward from an end of the core-metal cylindrical portion in a direction parallel to the axial direction, the seal member includes an axial lip brought into sliding contact with the outward flange portion of the slinger, a radial gap between the inner circumferential surface of the seal body and an outer circumferential surface of a bent portion formed by bending the outward flange portion of the slinger includes a first gap portion and a second gap portion closer to the inward flange portion of the core metal than the first gap portion is, the outer circumferential surface that defines the first gap portion is a cylindrical or substantially cylindrical outer circumferential surface, the radial gap in the first gap portion is substantially constant in a direction parallel to the axial direction, the outer circumferential surface that defines the second gap portion is a conical or substantially conical outer circumferential surface, which is reduced in diameter as approaching the inward flange portion of the core metal in a direction parallel to the axial direction, and the radial gap in the second gap portion is gradually increased as approaching the inward flange portion of the core metal in a direction parallel to the axial direction.
Assignees
Inventors
Classifications
Wheel hubs or castors · CPC title
with rigid casings or supports · CPC title
with sealing lips · CPC title
having two or more lips · CPC title
mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2020003260A1 cover?
- A radial gap between an outer circumferential surface of an encoder member joined to an outward flange portion of a slinger and an inner circumferential surface of a seal body includes a first gap portion and a second gap portion closer to an inward flange portion of a core metal than the first gap portion is. The outer circumferential surface that defines the first gap portion is a cylindrical…
- Who is the assignee on this patent?
- Nakanishi Metal Works Co
- What technology area does this patent fall under?
- Primary CPC classification F16C33/7823. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jan 02 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).