Driving device

Patent metadata

Field	Value
Publication number	US-9731408-B2
Application number	US-201113158799-A
Country	US
Kind code	B2
Filing date	Jun 13, 2011
Priority date	Jun 15, 2010
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

According to one aspect of the application, a device for driving a fastening element into a substrate has an energy-transfer element for transferring energy to the fastening element. The energy-transfer element can move preferably between a starting position and a setting position, wherein the energy-transfer element is located, before a driving-in procedure, in the starting position and, after the driving-in procedure, in the setting position.
According to another aspect of the application, the device comprises a mechanical-energy storage device for storing mechanical energy. The energy-transfer element is then suitable preferably for transferring energy from the mechanical-energy storage device to the fastening element.

First claim

The invention claimed is:

1. A method for driving a fastening element into a substrate, comprising placing the fastening element in contact with a device comprising a mechanical-energy storage device for storing mechanical energy; an energy-transfer element that can move between a starting position and a setting position for transferring energy from the mechanical-energy storage device to the fastening element; an energy-transfer mechanism for transferring energy from an energy source to the mechanical-energy storage device, wherein the energy-transfer mechanism comprises a motor operable in a tensioning direction against a load torque that is exerted by the mechanical-energy storage device on the motor and operable essentially load-free in a restoring direction opposite the tensioning direction; and, a motor control mechanism comprising power electronics for controlling the motor, wherein the motor control mechanism can regulate the current intensity received by the motor to a specified desired current intensity, for rotation of the motor in the tensioning direction, and, can regulate the rotational speed of the motor to a specified desired rotational speed, for rotation of the motor in the restoring direction; and,
operating the device, wherein the energy-transfer element moves between a starting position and a setting position and transfers energy from the mechanical-energy storage device to the fastening element, driving the fastening element into the substrate.

2. The method according to claim 1 , wherein the energy source comprises an electrical-energy storage device.

3. The method according to claim 1 , comprising determining a desired current intensity according to specified criteria before operating the motor in the tensioning direction.

4. The method according to claim 3 , wherein the specified criteria is selected from the group consisting of a charge state and a temperature of the electrical-energy storage device.

5. The method according to claim 3 , wherein the specified criteria is selected from the group consisting of an operating period and an age of the device.

6. The method according to claim 1 , wherein the motor is an electrically commutated motor.

7. The method according to claim 1 , wherein the motor is a brush-less direct-current motor.

8. The method according to claim 1 , comprising lowering the rotational speed of the motor while energy is stored in the mechanical-energy storage device.

9. A device for driving a fastening element into a substrate, comprising a mechanical-energy storage device for storing mechanical energy; an energy-transfer element that can move between a starting position and a setting position for transferring energy from the mechanical-energy storage device to the fastening element; an energy-transfer mechanism for transferring energy from an energy source to the mechanical-energy storage device, wherein the energy-transfer mechanism comprises a motor operable in a tensioning direction against a load torque that is exerted by the mechanical-energy storage device on the motor and operable essentially load-free in a restoring direction opposite the tensioning direction; and, a motor control mechanism comprising power electronics for controlling the motor, wherein the motor control mechanism regulates the current intensity received by the motor to a specified desired current intensity for rotation of the motor in the tensioning direction, and, regulates the rotational speed of the motor to a specified desired rotational speed for rotation of the motor in the restoring direction.

10. The device according to claim 9 , further comprising the energy source.

11. The device according to claim 10 , wherein the energy source is formed by an electrical-energy storage device.

12. The device according to claim 11 , wherein the motor control mechanism is suitable for determining the specified desired current intensity according to specified criteria.

13. The device according to claim 11 , wherein the motor is an electrically commutated motor or a brush-less direct-current motor.

14. The device according to claim 10 , wherein the motor control mechanism is suitable for determining the specified desired current intensity according to specified criteria.

15. The device according to claim 14 , wherein the specified criteria is selected from the group consisting of an operating period and an age of the device.

16. The device according to claim 10 , wherein the motor is an electrically commutated motor or a brush-less direct-current motor.

17. The device according to claim 9 , wherein the motor control mechanism is suitable for determining the specified desired current intensity according to specified criteria.

18. The device according to claim 17 , wherein the specified criteria is selected from the group consisting of a charge state and a temperature of the electrical-energy storage device.

19. The device according to claim 17 , wherein the specified criteria is selected from the group consisting of an operating period and an age of the device.

20. The device according to claim 9 , wherein the motor is an electrically commutated motor or a brush-less direct-current motor.

Assignees

• Groer Stefan
• Beck Wolfgang
• Bertsch Klaus
• Hilti Ag

Inventors

• Groer Stefan
• Beck Wolfgang
• Bertsch Klaus

Classifications

• B25C1/06 Primary

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• B25C1/003

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• B25C1/008

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• Y10T29/49833

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