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US 8,985,236 B2Granted
Handheld power tool
AssigneeHilti Aktiengesellschaft
InventorsMichael Wierer, Adrian Scherrer, Fabian Martin, Josef Althaus
Life of this patent
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Abstract
A handheld power tool is disclosed. The handheld power tool has a drive oscillating along a working axis and a vibration damper. The vibration damper has a mass element suspended in a spring mechanism. The spring mechanism acts with a first spring stiffness and acts with a second spring stiffness. The first spring stiffness is different from the second spring stiffness.
Claims20
A handheld power tool, comprising:
- a drive, wherein the drive is oscillatable along a working axis of the handheld power tool;
- and
- a vibration damper, wherein the vibration damper includes:
- a housing;
- a spring mechanism;
- and
- a mass element suspended in the spring mechanism;
- wherein the spring mechanism and the suspended mass element are mounted in the housing;
- wherein the spring mechanism is actable with a first spring stiffness on the mass element in response to a deflection of the mass element out of a basic position and in a first direction parallel to the working axis;
- wherein the spring mechanism is actable with a second spring stiffness on the mass element in response to a deflection out of the basic position and in a second direction, wherein the second direction is opposite from the first direction;
- wherein the first spring stiffness is different from the second spring stiffness;
- and wherein the spring mechanism and the suspended mass element is coordinated with a natural frequency which is greater by less than 10% to a rate of repetition of a striking mechanism of the handheld power tool.
9 more elements
A handheld power tool, comprising:
- a drive, wherein the drive is oscillatable along a working axis of the handheld power tool;
- and
- a vibration damper, wherein the vibration damper includes:
- a housing;
- a spring mechanism with a first spring element and a second spring element;
- and
- a mass element disposed between the first spring element and the second spring element;
- wherein the spring mechanism and the mass element are mounted in the housing;
- wherein the first spring element has a first spring stiffness and the second spring element has a second spring stiffness and wherein the first spring stiffness is different from the second spring stiffness;
- and wherein the spring mechanism and the mass element is coordinated with a natural frequency which is greater by less than 10% to a rate of repetition of a striking mechanism of the handheld power tool.
7 more elements
Dependencies are inferred from the claim text.