Drive device, image forming apparatus, and grease composition
US-2015344809-A1 · Dec 3, 2015 · US
Drive device, image forming apparatus, and grease composition
US9783755B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9783755-B2 |
| Application number | US-201514715784-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 19, 2015 |
| Priority date | May 29, 2014 |
| Publication date | Oct 10, 2017 |
| Grant date | Oct 10, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
A drive device includes a slide bearing; a shaft that passes through the slide bearing; a gear that is fixed to the shaft; and a grease composition that is held in a clearance between the slide bearing and the shaft. At least one of the slide bearing and the shaft is made of a resin. The clearance is in a range of 10 to 110 μm. The grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener. A weight ratio of the hydrocarbon base oil to the lithium soap is in a range of 94.5:5.5 to 96.0:4.0. A consistency of the grease composition is in a range of 360 to 400.
First claim
Opening claim text (preview).
What is claimed is: 1. A drive device comprising: a slide bearing; a shaft that passes through the slide bearing; a gear that is fixed to the shaft; and a grease composition that is held in a clearance between the slide bearing and the shaft, wherein at least one of the slide bearing and the shaft is made of a resin, the clearance is in a range of 10 to 110 μm, the grease composition contains a hydrocarbon base oil and lithium soap serving as a thickener, a weight ratio of the hydrocarbon base oil to the lithium soap is in a range of 94.5:5.5 to 96.0:4.0, and a consistency of the grease composition is in a range of 360 to 400. 2. The drive device according to claim 1 , wherein one of the slide bearing and the shaft is made of a metal or an alloy. 3. The drive device according to claim 2 , wherein the shaft is made of a stainless steel or a free-cutting steel. 4. The drive device according to claim 1 , wherein the slide bearing is made of a polyacetal resin. 5. The drive device according to claim 1 , wherein a kinetic viscosity of the hydrocarbon base oil is equal to or smaller than 20 mm2/s at 40□ C. 6. The drive device according to claim 1 , wherein the grease composition contains olefin resin powder. 7. The drive device according to claim 1 , wherein the grease composition is held on a tooth flank of the gear attached to the shaft and a tooth flank of another gear engaged with the gear attached to the shaft. 8. The drive device according to claim 1 , wherein the grease composition held in the clearance contains a styrene thickener. 9. An image forming apparatus, comprising the drive device according to claim 1 . 10. A grease composition used for the drive device according to claim 1 .
Assignees
Inventors
Classifications
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- What does patent US9783755B2 cover?
- A drive device includes a slide bearing; a shaft that passes through the slide bearing; a gear that is fixed to the shaft; and a grease composition that is held in a clearance between the slide bearing and the shaft. At least one of the slide bearing and the shaft is made of a resin. The clearance is in a range of 10 to 110 μm. The grease composition contains a hydrocarbon base oil and lithium …
- Who is the assignee on this patent?
- Kabata Toshiyuki, Seo Kumiko, Ishida Masahiro, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification C10M117/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 10 2017 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).