Fiber reinforced resin screw
US-10533596-B2 · Jan 14, 2020 · US
Composite ball screw
US11041552B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11041552-B2 |
| Application number | US-201816034437-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 13, 2018 |
| Priority date | Jul 14, 2017 |
| Publication date | Jun 22, 2021 |
| Grant date | Jun 22, 2021 |
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- Title
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- Abstract
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- Assignees and inventors
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- Key dates
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- First independent claim
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Abstract
Official abstract text for this publication.
A threaded shaft for a ball screw comprising: a shaft of fibre-reinforced polymer material; and a helical ridge formed on an outer surface of said shaft, said helical ridge being formed from a fibre-reinforced polymer material comprising a plurality of helical fibres wound around the shaft in the same sense and grouped together to form the ridge. The helical ridge formed from grouped helical fibres all wound with the same sense provides excellent axial load carrying capability as the fibres run continuously from end to end of the shaft and can thus transmit load from end to end. This adds much greater strength than a shaft formed from plastics only. The load carrying capability of the fibre wound helical ridge can indeed approach that of existing metal threads while still being much lighter in weight.
First claim
Opening claim text (preview).
The invention claimed is: 1. A threaded shaft for a ball screw comprising: a shaft of fibre-reinforced polymer material; a helical ridge formed on an outer surface of said shaft, said helical ridge being formed from a fibre-reinforced polymer material comprising a plurality of helical fibres wound around the shaft in the same rotational sense and grouped together to form the ridge; and an outer layer of fibre reinforced polymer material formed over the shaft and the helical ridge wherein the outer layer provides a full coverage over the helical ridge. 2. A threaded shaft as claimed in claim 1 , wherein the helical fibres run parallel to one another around the shaft. 3. A threaded shaft as claimed in claim 1 , wherein the helical fibres are glass fibres or carbon fibres. 4. A threaded shaft as claimed in claim 1 , wherein the outer layer of fibre reinforced polymer has been shaped and/or smoothed by a material removal process. 5. A threaded shaft as claimed in claim 1 , further comprising a top coat of hard material, wherein the hard material has a hardness greater than 60 Rockwell C. 6. A threaded shaft as claimed in claim 1 , wherein a helical groove is formed interwound with the helical ridge. 7. A threaded shaft as claimed in claim 6 , wherein the helical groove is shaped so as to receive ball bearings. 8. A threaded shaft as claimed in claim 1 , wherein the helical ridge has a flat radially outer surface. 9. A threaded shaft as claimed in claim 1 , comprising two or more helical ridges running parallel to each other and interwound with each other.
Assignees
Inventors
Classifications
- F16H25/2204Primary
with balls · CPC title
- B29D1/005Primary
fibre reinforced · CPC title
having corrugations · CPC title
by winding impregnated fibres · CPC title
Shafts · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11041552B2 cover?
- A threaded shaft for a ball screw comprising: a shaft of fibre-reinforced polymer material; and a helical ridge formed on an outer surface of said shaft, said helical ridge being formed from a fibre-reinforced polymer material comprising a plurality of helical fibres wound around the shaft in the same sense and grouped together to form the ridge. The helical ridge formed from grouped helical fi…
- Who is the assignee on this patent?
- Crompton Technology Group Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H25/2204. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 22 2021 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).