Linear transmission device
US-10767741-B1 · Sep 8, 2020 · US
Screw device
US11525498B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11525498-B2 |
| Application number | US-201917258232-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 19, 2019 |
| Priority date | Jul 10, 2018 |
| Publication date | Dec 13, 2022 |
| Grant date | Dec 13, 2022 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A screw device is provided which can detect damage to a groove of a screw shaft, the damage being hidden by a nut, with a high probability. At least two circulation components are mounted on a nut in such a manner as to form at least two circulation circuits that circulate rolling elements. The nut is provided with a sensor that detects a displacement of a groove of a screw shaft between the adjacent circulation circuits.
First claim
Opening claim text (preview).
The invention claimed is: 1. A screw device comprising: a screw shaft including a groove; a nut including a groove facing the groove of the screw shaft; at least two circulation components mounted on the nut in such a manner as to form at least two circulation circuits; a plurality of rolling elements housed in the at least two circulation circuits; and a sensor provided to the nut, the sensor being configured to detect a displacement of the groove of the screw shaft between the adjacent circulation circuits, wherein the sensor is sandwiched between a first holder and a second holder, the first holder being mounted on an inner surface of the nut and having a body portion that enters the groove of the nut, and the second holder being mounted on the inner surface of the nut and having a body portion that enters the groove of the shaft. 2. The screw device according to claim 1 , wherein the sensor is placed between the adjacent circulation circuits of the nut. 3. The screw device according to claim 2 , wherein the sensor is an eddy current displacement sensor. 4. The screw device according to claim 1 , wherein the sensor is an eddy current displacement sensor. 5. A screw device comprising: a screw shaft including a groove; a nut including a groove facing the groove of the screw shaft; at least two circulation components mounted on the nut in such a manner as to form at least two circulation circuits; a plurality of rolling elements housed in the at least two circulation circuits; and a sensor provided to the nut, the sensor being configured to detect a displacement of the groove of the screw shaft between the adjacent circulation circuits, wherein the sensor is sandwiched between a first holder and a second holder, the first holder being mounted on an inner surface of the nut and having an extension portion that is in direct contact with a top of a ridge of the nut, and the second holder being mounted on the inner surface of the nut and having an extension portion that is in direct contact with a top of the ridge of the nut. 6. The screw device according to claim 5 , wherein the sensor is placed between the adjacent circulation circuits of the nut. 7. The screw device according to claim 6 , wherein the sensor is an eddy current displacement sensor. 8. The screw device according to claim 5 , wherein the sensor is an eddy current displacement sensor.
Assignees
Inventors
Classifications
- F16H25/2015Primary
Means specially adapted for stopping actuators in the end position; Position sensing means · CPC title
Screw mechanisms (with automatic reversal F16H25/12) · CPC title
- F16H25/2214Primary
with elements for guiding the circulating balls · CPC title
Measuring on screw threads · CPC title
of gearings · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11525498B2 cover?
- A screw device is provided which can detect damage to a groove of a screw shaft, the damage being hidden by a nut, with a high probability. At least two circulation components are mounted on a nut in such a manner as to form at least two circulation circuits that circulate rolling elements. The nut is provided with a sensor that detects a displacement of a groove of a screw shaft between the ad…
- Who is the assignee on this patent?
- Thk Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H25/2015. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 13 2022 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).