Drive device, image forming apparatus, and grease composition
AssigneesRicoh Company, Ltd., Dow Corning Toray Co., Ltd.
InventorsToshiyuki Kabata, Kumiko Seo, Masahiro Ishida, Naoki Matsuda, Teruyoshi Tanaka
Life of this patent
Estimating the term…
Abstract
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.
Claims10
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.
Dependencies are inferred from the claim text.