Lubricant compositions comprising polymeric diphenylamine antioxidants
US-2019127656-A1 · May 2, 2019 · US
Grease-sealed bearing
US12253113B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12253113-B2 |
| Application number | US-202118026573-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 13, 2021 |
| Priority date | Sep 16, 2020 |
| Publication date | Mar 18, 2025 |
| Grant date | Mar 18, 2025 |
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- Title
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Abstract
Official abstract text for this publication.
To provide a grease-sealed bearing that is superior in fretting wear resistance and sealing performance when used under an oscillation condition with acceleration and deceleration such as a condition used in a robot joint. A grease-sealed bearing 1 includes an inner ring 2 and an outer ring 3 that are raceway rings, a plurality of rolling elements 4 interposed between the inner ring 2 and the outer ring 3 , and a grease composition 7 sealed around the rolling elements 4 . The bearing oscillates such that a bearing rotational direction changes while accelerating and decelerating. The grease composition contains a base oil and a thickener. The worked penetration of the grease composition is 310 or more. The thickener is a calcium sulfonate complex soap.
First claim
Opening claim text (preview).
The invention claimed is: 1. A grease-sealed bearing comprising: an inner ring and an outer ring that are raceway rings; a plurality of rolling elements that is interposed between the inner ring and the outer ring; and a grease composition that is sealed around the rolling elements, the bearing being configured to oscillate such that a rotational direction of the bearing changes while accelerating and decelerating, wherein: the grease composition contains a base oil and a thickener, the worked penetration of the grease composition is 310 or more, and the thickener is a calcium sulfonate complex soap. 2. The grease-sealed bearing as defined in claim 1 , wherein the grease-sealed bearing is used under a high load condition in which the maximum contact surface pressure on the raceway ring is 2,000 MPa or more and under a condition less than a critical oscillation angle. 3. The grease-sealed bearing as defined in claim 1 , wherein the worked penetration is in a range of 310-340. 4. The grease-sealed bearing as defined in claim 1 , wherein the base oil is a mineral oil or a synthetic hydrocarbon oil. 5. The grease-sealed bearing as defined in claim 1 , wherein the grease-sealed bearing is configured as an angular contact ball bearing. 6. The grease-sealed bearing as defined in claim 1 , wherein the grease-sealed bearing is configured as a robot joint bearing.
Assignees
Inventors
Classifications
semi-solid; greasy · CPC title
Bearings · CPC title
used as thickening agents · CPC title
used as base material · CPC title
Mixtures of base-materials and thickeners · CPC title
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Frequently asked questions
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- What does patent US12253113B2 cover?
- To provide a grease-sealed bearing that is superior in fretting wear resistance and sealing performance when used under an oscillation condition with acceleration and deceleration such as a condition used in a robot joint. A grease-sealed bearing 1 includes an inner ring 2 and an outer ring 3 that are raceway rings, a plurality of rolling elements 4 interposed between the inner ring 2 …
- Who is the assignee on this patent?
- Ntn Toyo Bearing Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16C33/6633. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 18 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).