Driving device
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.
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.