Planetary gear unit
US-2017227093-A1 · Aug 10, 2017 · US
Torsional vibration damper
US10323715B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10323715-B2 |
| Application number | US-201715484723-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 11, 2017 |
| Priority date | Apr 13, 2016 |
| Publication date | Jun 18, 2019 |
| Grant date | Jun 18, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
A torsional vibration damper in which noise and vibrations in a planetary gear unit are suppressed is provided. In a planetary gear unit, as an inertial element is oscillated to establish an inertial torque by a relative rotation between a sun gear and a ring gear. Pinion gears are interposed between the sun gear and the ring gear at predetermined intervals, and gear dimensions of one of the pinion gears and gear dimensions of another one of the pinion gears are different from each other.
First claim
Opening claim text (preview).
What is claimed is: 1. A torsional vibration damper, comprising: a planetary gear unit including three rotary elements of a ring gear, a sun gear, and a carrier; and a plurality of pinion gears interposed between the ring gear and the sun gear while being supported by the carrier in a rotatable manner and being arranged in a circumferential direction of the sun gear or the ring gear, wherein one of the rotary elements serves as an input element, another one of the rotary elements serves as an output element, and still another one of the rotary elements serves as an inertial element that is oscillated to establish an inertial torque by a relative rotation between the input element and the output element within a predetermined range, the pinion gears mesh the sun gear and the ring gear at predetermined intervals, gear dimensions of one of the pinion gears and gear dimensions of another one of the pinion gears are different from each other, modules of the sun gear and the ring gear within an oscillation range of said one of the pinion gears are identical to that of said one of the pinion gears, and modules of the sun gear and the ring gear within an oscillation range of said another one of the pinion gears are identical to that of said another one of the pinion gears. 2. The torsional vibration damper as claimed in claim 1 , wherein the gear dimensions include the module, backlash and number of teeth. 3. The torsional vibration damper as claimed in claim 1 , wherein the ring gear, the sun gear and the pinion gears individually include a helical gear, and wherein the pinion gears are disposed on a predetermined circle around a rotational center axis of the sun gear at predetermined intervals. 4. The torsional vibration damper as claimed in claim 2 , wherein the ring gear, the sun gear and the pinion gears individually include a helical gear, and wherein the pinion gears are disposed on a predetermined circle around a rotational center axis of the sun gear at predetermined intervals.
Assignees
Inventors
Classifications
- F16F15/1478Primary
with a planetary gear system · CPC title
Arrangements for adjusting or for taking-up backlash · CPC title
Wound springs {(F16F15/1333, F16F15/1337, F16F15/137 take precedence)} · CPC title
- F16F15/1206Primary
with a planetary gear system · CPC title
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- What does patent US10323715B2 cover?
- A torsional vibration damper in which noise and vibrations in a planetary gear unit are suppressed is provided. In a planetary gear unit, as an inertial element is oscillated to establish an inertial torque by a relative rotation between a sun gear and a ring gear. Pinion gears are interposed between the sun gear and the ring gear at predetermined intervals, and gear dimensions of one of the pi…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16F15/1478. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 18 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).