Ball screw device and steering system including ball screw device
US-2018195590-A1 · Jul 12, 2018 · US
Ball screw
US9593752B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9593752-B2 |
| Application number | US-201314761816-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 29, 2013 |
| Priority date | Feb 8, 2013 |
| Publication date | Mar 14, 2017 |
| Grant date | Mar 14, 2017 |
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 ball screw ( 1 ) having a threaded nut ( 3 ) arranged on the threaded shaft ( 2 ) and a ball channel ( 4 ) wound about the longitudinal axis of the threaded shaft ( 2 ), and in which the balls ( 5 ) and at least one helical spring ( 6 ) are received. This helical spring ( 6 ) is supported on a molded part ( 7 ) which is inserted into a recess ( 8 ) of the threaded nut ( 3 ) and closes the recess ( 8 ).
First claim
Opening claim text (preview).
The invention claimed is: 1. A ball screw comprising a threaded nut arranged on a threaded shaft, the threaded shaft including threads that define a ball channel wound about a longitudinal axis of the threaded shaft, balls and at least one helical spring are received in the ball channel, a molded part that supports the helical spring is inserted into a recess of the threaded nut and closes the recess, the molded part is held with a positive fit in the recess by contact with the threads of the threaded shaft, the molded part has a projecting shoulder extending in a circumferential direction with a first surface pointing toward the threaded nut and a second, oppositely arranged surface pointing toward the threaded shaft. 2. The ball screw according to claim 1 , wherein the molded part has a section with an opposite construction with respect to a threaded profile of the threaded shaft. 3. The ball screw according to claim 1 , wherein the projecting shoulder that extends in the circumferential direction has a circular segment shape. 4. The ball screw according to claim 1 , wherein the molded part is an injection molded, die cast, or sintered part. 5. The ball screw according to claim 1 , wherein the molded part is a machined part. 6. The ball screw according to claim 1 , wherein said shoulder engages in a ring gap defined by the threaded nut and the threaded shaft.
Assignees
Inventors
Classifications
Electric or magnetic · CPC title
adapted for drawing members together {, e.g. for disc brakes} · CPC title
- F16H25/2233Primary
with cages or means to hold the balls in position · CPC title
Screw-and-nut · CPC title
Rolling element engaging thread · 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 US9593752B2 cover?
- A ball screw ( 1 ) having a threaded nut ( 3 ) arranged on the threaded shaft ( 2 ) and a ball channel ( 4 ) wound about the longitudinal axis of the threaded shaft ( 2 ), and in which the balls ( 5 ) and at least one helical spring ( 6 ) are received. This helical spring ( 6 ) is supported on a molded part ( 7 ) which is inserted into a recess ( 8 ) of the threaded nut ( 3 ) and closes the rec…
- Who is the assignee on this patent?
- Schaeffler Technologies Ag
- What technology area does this patent fall under?
- Primary CPC classification F16H25/2233. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 14 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).