Power transmission device for a hybrid vehicle and hybrid system
US-9428179-B2 · Aug 30, 2016 · US
Gear device
US10228045B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10228045-B2 |
| Application number | US-201715710079-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 20, 2017 |
| Priority date | Oct 25, 2016 |
| Publication date | Mar 12, 2019 |
| Grant date | Mar 12, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A gear device includes a first gear, a second gear, and a third gear. The second gear is constituted of first meshing teeth that mesh with teeth in a first row of teeth of the first gear, second meshing teeth that mesh with teeth in a second row of teeth of the first gear, third meshing teeth that mesh with teeth in a third row of teeth of the third gear, and fourth meshing teeth that mesh with teeth in a fourth row of teeth of the third gear. The helix directions of the first meshing teeth and the third meshing teeth are the same direction. The helix directions of the second meshing teeth and the fourth meshing teeth are the same direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A gear device comprising: a first gear; a second gear that meshes with the first gear; and a third gear that meshes with the second gear, wherein: the first gear includes a first row of teeth and a second row of teeth that are aligned along an axial direction of a rotation axis of the second gear and have helix directions of a tooth trace different from each other; the third gear includes a third row of teeth and a fourth row of teeth that are aligned along the axial direction of the rotation axis of the second gear and have helix directions of a tooth trace different from each other; the second gear includes first meshing teeth, second meshing teeth, third meshing teeth, and fourth meshing teeth; the first meshing teeth mesh with teeth in the first row of teeth of the first gear; the second meshing teeth mesh with teeth in the second row of teeth of the first gear; the third meshing teeth are provided in a row of teeth different from a row of teeth of the first meshing teeth; the third meshing teeth mesh with teeth in the third row of teeth of the third gear; the fourth meshing teeth are provided in a row of teeth different from a row of teeth of the second meshing teeth; the fourth meshing teeth mesh with teeth in the fourth row of teeth of the third gear; a helix direction of the first meshing teeth and a helix direction of the third meshing teeth are the same direction; and a helix direction of the second meshing teeth and a helix direction of the fourth meshing teeth are the same direction. 2. The gear device according to claim 1 , wherein: the first meshing teeth and the second meshing teeth are internal teeth; and the third meshing teeth and the fourth meshing teeth are external teeth. 3. The gear device according to claim 1 , wherein: the second gear includes a first divided gear, a second divided gear, and a coupling member that couples the first divided gear and the second divided gear; the first divided gear includes the first meshing teeth and the third meshing teeth; and the second divided gear includes the second meshing teeth and the fourth meshing teeth. 4. The gear device according to claim 1 , wherein a pitch diameter and a base helix angle in the first meshing teeth of the second gear and a pitch diameter and a base helix angle in the third meshing teeth of the second gear satisfy a relationship of a following expression, r 1 /r 2 =sin β g1 /sin β g2 where r 1 is a pitch diameter in the first meshing teeth, r 2 is a pitch diameter in the third meshing teeth, β g1 is a base helix angle in the first meshing teeth, and β g2 is a base helix angle in the third meshing teeth.
Assignees
Inventors
Classifications
- F16H1/28Primary
with gears having orbital motion · CPC title
Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) · CPC title
of gearings with members having orbital motion · CPC title
only adjustable when pulley is stationary · CPC title
the members having helical, herringbone, or like teeth · CPC title
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- What does patent US10228045B2 cover?
- A gear device includes a first gear, a second gear, and a third gear. The second gear is constituted of first meshing teeth that mesh with teeth in a first row of teeth of the first gear, second meshing teeth that mesh with teeth in a second row of teeth of the first gear, third meshing teeth that mesh with teeth in a third row of teeth of the third gear, and fourth meshing teeth that mesh with…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H1/28. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 12 2019 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).