Driving device

Patent metadata

Field	Value
Publication number	US-9937608-B2
Application number	US-201113158663-A
Country	US
Kind code	B2
Filing date	Jun 13, 2011
Priority date	Jun 15, 2010
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

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 device for driving a fastening element into a substrate, comprising an energy-transfer element that can move along a setting axis between a starting position and a setting position for transferring energy to the fastening element; and a deceleration element for decelerating the energy-transfer element, wherein the deceleration element comprises a stop element with a stop face for the energy-transfer element, and an impact-damping element; wherein the stop element is made from a metal or an alloy, and the impact-damping element is made from an elastomer, the impact-damping element and the stop element each having a mass, wherein the mass of the impact-damping element equals at least 15% of the mass of the stop element.

2. The according to claim 1 , wherein the mass of the impact-damping element equals at least 20% of the mass of the stop element.

3. The device of claim 1 , wherein the mass of the impact-damping element equals at least 8% of the mass of the energy-transfer element.

4. The device according to claim 3 , wherein the mass of the impact-damping element equals at least 10% of the mass of the energy-transfer element.

5. The device according to claim 4 , wherein the mass of the impact-damping element equals at least 12%.

6. The device according to claim 3 , wherein the energy-transfer element can move along a setting axis with a maximum kinetic energy between a starting position and a setting position for transferring energy to the fastening element; and wherein the impact-damping element has a mass, and a ratio of the mass of the impact-damping element to the maximum kinetic energy of the energy-transfer element equals at least 0.05 g/J.

7. The device of claim 1 , wherein the energy-transfer element can move along the setting axis with a maximum kinetic energy between the starting position and the setting position, and a ratio of the mass of the impact-damping element to the maximum kinetic energy of the energy-transfer element equals at least 0.05 g/J.

8. The device according to claim 7 , wherein the ratio of the mass of the impact-damping element to the maximum kinetic energy of the energy-transfer element equals at least 0.10 g/J.

9. The device according to claim 1 , wherein the impact-damping element is connected to the stop element with a material fit.

10. The device according to claim 9 , wherein the impact-damping element is vulcanized onto the stop element.

11. The device according to claim 1 , wherein the elastomer has HNBR, NBR, NR, SBR, IIR, or CR.

12. The device according to claim 1 , wherein the elastomer has a Shore hardness that equals at least 50 Shore A.

13. The device according to claim 1 , wherein the alloy has hardened steel.

14. The device according to claim 1 , wherein the metal has a surface hardness that equals at least 30 HRC.

15. The device according to claim 14 , wherein the alloy has a surface hardness that equals at least 30 HRC.

16. The device according to claim 1 , wherein the stop face comprises a concavo-conical section.

17. The device according to claim 1 , further comprising a mechanical-energy storage device for storing mechanical energy and an energy-transfer mechanism for transferring energy from an energy source to the mechanical-energy storage device and for transporting the energy-transfer element from the setting position into the starting position, wherein the energy-transfer element is provided for transferring energy from the mechanical-energy storage device to the fastening element.

18. The device according to claim 17 , wherein the mechanical-energy storage device is suitable for storing potential energy.

19. The device according to claim 17 , wherein the mechanical-energy storage device has a spring element.

20. The device according to claim 19 , wherein the spring element comprises a coil spring.

Assignees

• Hahn Wolfram
• Schiestl Ulrich
• Hilti Ag

Inventors

• Hahn Wolfram
• Schiestl Ulrich

Classifications

• B25C1/06 Primary

  operated by electric power · CPC title

• B25C1/14

  acting on an intermediate plunger or anvil (pistols for slaughtering or stunning animals A22B3/02) · CPC title

• B25C1/18 Primary

  Details and accessories, e.g. splinter guards, spall minimisers · CPC title

• B25D17/00

  Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00)} · CPC title

• B25C7/00

  Accessories for nailing or stapling tools, e.g. supports (for tools operated by detonation of a cartridge B25C1/18) · CPC title