Working tool

Patent metadata

Field	Value
Publication number	US-11999035-B2
Application number	US-202017783388-A
Country	US
Kind code	B2
Filing date	Dec 9, 2020
Priority date	Dec 20, 2019
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A tool for working a substrate, the tool having a stator and a working piston, which is intended to move relative to the stator along a working axis, also having a drive, which is intended to drive the working piston from a starting position along the working axis to the substrate, the drive comprising a first piston coil arranged on the working piston and a first stator coil arranged on the stator, and the first piston coil being intended to enter the first stator coil during a movement of the working piston relative to the stator along the working axis.

First claim

The invention claimed is:

1. A tool for working a substrate, the tool having a stator and a working piston, which is intended to move relative to the stator along a working axis, also having a drive, which is intended to drive the working piston from a starting position along the working axis to the substrate, the drive comprising a first piston coil arranged on the working piston and a first stator coil arranged on the stator, and the first piston coil being intended to enter the first stator coil during a movement of the working piston relative to the stator along the working axis.

2. The tool as claimed in claim 1 , the first piston coil having a first piston coil axis and the first stator coil having a first stator coil axis, which is oriented parallel to the first piston coil axis.

3. The tool as claimed in claim 2 , with the first piston coil and the first stator coil being able to be supplied with current in the same direction in order to generate magnetic fields in the same direction and to accelerate the first piston coil into the first stator coil.

4. The tool as claimed in claim 3 , the drive having a second piston coil arranged on the working piston, which is arranged offset relative to the first piston coil along the working axis and has a second piston coil axis, which is oriented parallel to the first piston coil axis, the second piston coil and the first stator coil being able to be supplied with current in opposite directions in order to generate opposing magnetic fields and to accelerate the second piston coil out of the first stator coil, while the first piston coil is accelerated into the first stator coil, the first piston coil and the second piston coil being accelerated in the same direction relative to the first stator coil.

5. The tool as claimed in claim 4 , the first piston coil and the second piston coil being electrically connected in series with one another and/or wound in opposite directions relative to one another.

6. The tool as claimed in claim 2 the first piston coil and the first stator coil being able to be supplied with current in opposite directions in order to generate opposing magnetic fields and to accelerate the first piston coil out of the first stator coil.

7. The tool as claimed in claim 6 , the drive having a second stator coil arranged on the stator, which is arranged offset relative to the first stator coil along the working axis and has a second stator coil axis, which is oriented parallel to the first piston coil axis, with the first piston coil and the second stator coil being able to be supplied with current in the same direction in order to generate magnetic fields in the same direction and to accelerate the first piston coil into the second stator coil while the first piston coil is accelerated out of the first stator coil, the first piston coil being accelerated in the same direction relative to the first stator coil and relative to the second stator coil.

8. The tool as claimed in claim 7 , the first stator coil and the second stator coil being electrically connected in series with one another and/or wound in opposite directions relative to one another.

9. The tool as claimed in claim 7 the drive having a second piston coil arranged on the working piston, which is arranged offset relative to the first piston coil along the working axis and has a second piston coil axis, which is oriented parallel to the first piston coil axis, with the second piston coil and the second stator coil being able to be supplied with current in opposite directions in order to generate opposing magnetic fields and to accelerate the second piston coil out of the second stator coil, while the first piston coil is accelerated out of the first stator coil, the first piston coil and the second piston coil being accelerated in the same direction relative to the first stator coil and relative to the second stator coil.

10. The tool as claimed in claim 1 , the first piston coil and the first stator coil being electrically connected in series with one another and/or wound in the same direction or in opposite directions relative to one another.

11. The tool as claimed in claim 1 the first piston coil having a piston coil outer diameter, and the first stator coil having a stator coil inner diameter, which is larger than the piston coil outer diameter.

12. The tool as claimed in claim 1 , the working piston comprising a reluctance element of a soft magnetic material, which is accelerated into the first stator coil by the magnetic field that is generated by the first stator coil.

13. The tool as claimed in claim 12 , the reluctance element projecting transversely to the working axis from the rest of the working piston toward the first stator coil.

14. The tool as claimed in claim 1 , the drive having an electrical capacitor, the first stator coil and/or the first piston coil being electrically connectable to the electrical capacitor in order during rapid discharge of the electrical capacitor to be flowed through by current and to generate the magnetic field.

15. The tool as claimed in claim 1 , having a receptacle which is intended to receive a fastening element, the working piston or the stator being intended to transfer a fastening element received in the receptacle into the substrate along the working axis.

16. The tool of claim 2 , wherein the first stator coil axis coincides with the first piston coil axis.

17. The tool as claimed in claim 3 , the first piston coil and the first stator coil being able to be supplied with current in opposite directions in order to generate opposing magnetic fields and to accelerate the first piston coil out of the first stator coil.

18. The tool as claimed in claim 8 , the drive having a second piston coil arranged on the working piston, which is arranged offset relative to the first piston coil along the working axis and has a second piston coil axis, which is oriented parallel to the first piston coil axis, with the second piston coil and the second stator coil being able to be supplied with current in opposite directions in order to generate opposing magnetic fields and to accelerate the second piston coil out of the second stator coil, while the first piston coil is accelerated out of the first stator coil, the first piston coil and the second piston coil being accelerated in the same direction relative to the first stator coil and relative to the second stator coil.

19. The tool as claimed in claim 2 , the first piston coil and the first stator coil being electrically connected in series with one another and/or wound in the same direction or in opposite directions relative to one another.

20. The tool as claimed in claim 2 , the first piston coil having a piston coil outer diameter, and the first stator coil having a stator coil inner diameter, which is larger than the piston coil outer diameter.

Assignees

• Hilti Ag

Inventors

• Abu Antoun Chafic
• Schmid Florian
• Binder Albert
• Gut Manuel

Classifications

• B25C1/06 Primary

  operated by electric power · CPC title

• H02K33/12

  with armatures moving in alternate directions by alternate energisation of two coil systems · CPC title

• H02P25/06

  Linear motors · CPC title

• H02K33/00

  Motors with reciprocating, oscillating or vibrating magnet, armature or coil system (arrangements for handling mechanical energy structurally associated with motors H02K7/00, e.g. H02K7/06) · CPC title

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title