Closed-loop control method based on testing machine for accurately controlling looseness of bolt transverse load
US-2020018673-A1 · Jan 16, 2020 · US
Motor device
US10700573B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10700573-B2 |
| Application number | US-201816115700-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 29, 2018 |
| Priority date | Oct 20, 2017 |
| Publication date | Jun 30, 2020 |
| Grant date | Jun 30, 2020 |
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- Title
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Abstract
Official abstract text for this publication.
A motor device includes: a motor which includes a fixing portion for fixing to a fixing surface with a bolt; a looseness detection sensor which is provided in the fixing portion so as to be adjacent to at least one of the bolts; and a control unit which detects the occurrence of looseness of at least one of the bolts based on a signal output from the looseness detection sensor, and the looseness detection sensor may be formed with any one of a microswitch, a pressure sensor, a vibration sensor and a strain gauge.
First claim
Opening claim text (preview).
What is claimed is: 1. A motor device comprising: a motor which includes a fixing portion for fixing to a fixing surface with a bolt; a looseness detection sensor which is provided in the fixing portion so as to be adjacent to at least one of the bolts, the looseness detection sensor indirectly detecting looseness of the bolt; and a control unit which determines occurrence of looseness of at least one of the bolts based on a signal output from the looseness detection sensor, wherein the looseness detection sensor is formed with a pressure sensor, the pressure sensor being sandwiched between the fixing portion and the fixing surface, and wherein the control unit detects decrease in pressure between the fixing portion and the fixing surface due to decrease in an axial force of the bolt, based on an output value from the pressure sensor. 2. A motor device comprising: a motor which includes a fixing portion for fixing to a fixing surface with a bolt; a looseness detection sensor which is provided in the fixing portion so as to be adjacent to at least one of the bolts, the looseness detection sensor indirectly detecting looseness of the bolt; and a control unit which determines occurrence of looseness of at least one of the bolts based on a signal output from the looseness detection sensor, wherein the looseness detection sensor is formed with a strain gauge, the strain gauge being attached to the fixing portion, and wherein the control unit detects reduction in strain of the fixing portion due to decrease in an axial force of the bolt, based on an output value from the strain gauge.
Assignees
Inventors
Classifications
- H02K11/20Primary
for measuring, monitoring, testing, protecting or switching (rectifiers H02K11/04; power electronics H02K11/33) · CPC title
Casings; Enclosures; Supports · CPC title
- H02K5/24Primary
specially adapted for suppression or reduction of noise or vibrations · CPC title
for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed · CPC title
using elastic means (single elements or their attachment F16F1/00 - F16F13/00); {(F16F15/023, F16F15/03 take precedence)} · CPC title
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- What does patent US10700573B2 cover?
- A motor device includes: a motor which includes a fixing portion for fixing to a fixing surface with a bolt; a looseness detection sensor which is provided in the fixing portion so as to be adjacent to at least one of the bolts; and a control unit which detects the occurrence of looseness of at least one of the bolts based on a signal output from the looseness detection sensor, and the loosenes…
- Who is the assignee on this patent?
- Fanuc Corp
- What technology area does this patent fall under?
- Primary CPC classification H02K11/20. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 30 2020 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).