Gearbox and driving device thereof
US-2023184019-A1 · Jun 15, 2023 · US
Planetary gear reduction mechanism
US2025035192A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025035192-A1 |
| Application number | US-202418605860-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 15, 2024 |
| Priority date | Jul 24, 2023 |
| Publication date | Jan 30, 2025 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A fifth ball bearing that rotatably supports a rotating shaft is provided on one side of a pinion gear in an axial direction of the rotating shaft. A sixth ball bearing that rotatably supports the rotating shaft is provided on the other side of the pinion gear in the axial direction of the rotating shaft. A carrier is provided with a bearing fixing portion that supports the fifth ball bearing immovably in the axial direction of the rotating shaft, and a bearing guide portion that supports the sixth ball bearing movably in the axial direction of the rotating shaft. The fifth and sixth ball bearings are provided so as not to be close to each other in the axial direction of the rotating shaft, and a female screw portion has a rattling adjustment member that presses the sixth ball bearing toward the side where the fifth ball bearing is provided.
First claim
Opening claim text (preview).
1 . A planetary gear reduction mechanism, comprising: a sun gear provided on a rotating shaft; an internal gear arranged on a radially outer side of the sun gear; a planetary gear arranged between the sun gear and the internal gear; a planetary carrier rotatably supporting the planetary gear; a first bearing provided on one side of the sun gear in an axial direction of the rotating shaft and rotatably supporting the rotating shaft; a second bearing provided on the other side of the sun gear in the axial direction of the rotating shaft and rotatably supporting the rotating shaft; a first bearing support portion provided on the planetary carrier and supporting the first bearing immovably in the axial direction of the rotating shaft; a second bearing support portion provided on the planetary carrier and supporting the second bearing movably in the axial direction of the rotating shaft; and a pressing member disposed in the second bearing support portion and configured to press the second bearing toward a side where the first bearing is provided; wherein the first bearing and the second bearing are provided so as not to be close to each other in the axial direction of the rotating shaft. 2 . The planetary gear reduction mechanism according to claim 1 , wherein the first bearing comprises a first inner ring and a first outer ring, the first inner ring is fixed to the rotating shaft, and the first outer ring is supported by the first bearing support portion. 3 . The planetary gear reduction mechanism according to claim 1 , wherein the second bearing comprises a second inner ring and a second outer ring, one axial side of the second inner ring is supported by a stepped portion provided on the rotating shaft, and the other axial side of the second outer ring is supported by the pressing member. 4 . The planetary gear reduction mechanism according to claim 1 , wherein the pressing member is screwed to the second bearing support portion. 5 . The planetary gear reduction mechanism according to claim 1 , wherein both axial sides of the planetary gear are respectively supported by ball bearings. 6 . The planetary gear reduction mechanism according to claim 1 , wherein the sun gear comprises only one tooth spirally connected in the axial direction of the rotating shaft.
Assignees
Inventors
Classifications
of gearings with members having orbital motion · CPC title
characterised by means for reducing vibration or noise · CPC title
Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly · CPC title
- F16H57/021Primary
Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title
- F16H57/02Primary
Gearboxes; Mounting gearing therein · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2025035192A1 cover?
- A fifth ball bearing that rotatably supports a rotating shaft is provided on one side of a pinion gear in an axial direction of the rotating shaft. A sixth ball bearing that rotatably supports the rotating shaft is provided on the other side of the pinion gear in the axial direction of the rotating shaft. A carrier is provided with a bearing fixing portion that supports the fifth ball bearing i…
- Who is the assignee on this patent?
- Mitsuba Corp
- What technology area does this patent fall under?
- Primary CPC classification F16H57/021. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jan 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).