Adaptive Power Display
US-2017274487-A1 · Sep 28, 2017 · US
Adaptive transmission mechanism
US9889548B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9889548-B2 |
| Application number | US-201515123926-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 6, 2015 |
| Priority date | Mar 7, 2014 |
| Publication date | Feb 13, 2018 |
| Grant date | Feb 13, 2018 |
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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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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A method to control a power tool includes the following steps: ascertaining a first rotational speed of the transmission in a first gear; ascertaining a first rotational speed of the motor when the transmission has been put into a first gear; ascertaining the selection of a first gear on the basis of the ratio of the rotational speed of the transmission and the rotational speed of the motor on the basis of a look-up table; selecting the no-load state; ascertaining the selected no-load state on the basis of the ratio of the rotational speed of the transmission and the rotational speed of the motor on the basis of a look-up table; adapting the rotational speed of the motor to a second gear on the basis of a ratio of the rotational speed of the transmission and the rotational speed of the motor on the basis of a look-up table; and selecting a second gear.
First claim
Opening claim text (preview).
What is claimed is: 1. A method to control a power tool including a motor as a drive for the power tool; a controller; a transmission having at least a first gear, a second gear and a no-load state; a tool; a first sensor to detect a rotational speed of at least one component of the transmission; and a second sensor to detect a motor rotational speed of the motor, the method comprising the following steps: ascertaining a first rotational speed of the at least one component of the transmission when the transmission has been put into the first gear; ascertaining a first rotational speed of the motor when the transmission has been put into the first gear, ascertaining a selection of the first gear on the basis of a first prescribed ratio of the first rotational speed of the at least one component of the transmission and of the first rotational speed of the motor on the basis of a look-up table; selecting the no-load state of the transmission; ascertaining the selected no-load state on the basis of a second prescribed ratio of a second rotational speed of the at least one component of the transmission and of a second rotational speed of the motor on the basis of the look-up table; adapting the motor rotational speed of the motor to a second gear on the basis of a third prescribed ratio of a third rotational speed of the at least one component of the transmission and of a third rotational speed of the motor on the basis of the look-up table; and selecting a second gear. 2. The method as recited in claim 1 wherein the rotational speed of the motor is adapted by increasing the motor rotational speed of the motor. 3. The method as recited in claim 1 wherein the rotational speed of the motor is adapted by decreasing the motor rotational speed of the motor. 4. A power tool performing the method as recited in claim 1 comprising: the motor as the drive for the power tool; the controller; the transmission having at least the first gear and the second gear; the tool; the first sensor to detect the rotational speed of the at least one component of the transmission; and the second sensor to detect the motor rotational speed of the motor. 5. A method to control a core drill including a motor as a drive for the core drill; a controller; a transmission having at least a first gear, a second gear and a no-load state; a core bit; a first sensor to detect a rotational speed of at least one component of the transmission; and a second sensor to detect a motor rotational speed of the motor, the method comprising the following steps: ascertaining a first rotational speed of the at least one component of the transmission when the transmission has been put into the first gear; ascertaining a first rotational speed of the motor when the transmission has been put into the first gear, ascertaining a selection of the first gear on the basis of a first prescribed ratio of the first rotational speed of the at least one component of the transmission and of the first rotational speed of the motor on the basis of a look-up table; selecting the no-load state of the transmission; ascertaining the selected no-load state on the basis of a second prescribed ratio of a second rotational speed of the at least one component of the transmission and of a second rotational speed of the motor on the basis of the look-up table; adapting the motor rotational speed of the motor to a second gear on the basis of a third prescribed ratio of a third rotational speed of the at least one component of the transmission and of a third rotational speed of the motor on the basis of the look-up table; and selecting a second gear. 6. A core drill performing the method as recited in claim 5 comprising: the motor as the drive for the core drill; the controller; the transmission having at least the first gear and the second gear; the core bit; the first sensor to detect the rotational speed of the at least one component of the transmission; and the second sensor to detect the motor rotational speed of the motor.
Assignees
Inventors
Classifications
Compensation of lag during constant speed movement · CPC title
Measurement of rotational speed · CPC title
characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) · CPC title
Use of electronics · CPC title
to control Tool rotation · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9889548B2 cover?
- A method to control a power tool includes the following steps: ascertaining a first rotational speed of the transmission in a first gear; ascertaining a first rotational speed of the motor when the transmission has been put into a first gear; ascertaining the selection of a first gear on the basis of the ratio of the rotational speed of the transmission and the rotational speed of the motor on …
- Who is the assignee on this patent?
- Hilti Ag
- What technology area does this patent fall under?
- Primary CPC classification B25F5/001. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 13 2018 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).