Hammer drill
AssigneeBlack & Decker Inc.
InventorRafael Gottschling
Life of this patent
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Abstract
A hammer drive mechanism for a hammer strike mechanism of a hammer drill is provided including: a drive shaft capable of being rotationally driven by a motor, a rod capable of reciprocatingly driving a piston, and a conversion mechanism that converts the rotary movement of the drive shaft into a reciprocating movement of the rod. The drive shaft comprises a first part connected to the conversion mechanism and a second part capable of being rotationally driven by a motor. The second part connects to the first part via at least one dampener such that rotary movement of the second part is transferred to the first part via the at least one dampener.
Claims20
A hammer drive mechanism for a hammer strike mechanism of a hammer drill comprising:
- a drive shaft rotationally driven by a motor;
- a rod configured to reciprocatingly drive a piston;
- and
- a conversion mechanism configured to convert a rotary movement of the drive shaft into a reciprocating movement of the rod,
- wherein the drive shaft comprises a first part connected to the conversion mechanism and a second part rotationally driven by the motor, the second part connecting to the first part via at least one dampener such that a rotary movement of the second part is transferred to the first part via the at least one dampener.
A hammer drive mechanism for a hammer strike mechanism of a hammer drill comprising:
- a drive shaft rotationally driven by a motor;
- a rod reciprocatingly driving a piston;
- and
- a conversion mechanism arranged to convert the rotary movement of the drive shaft into a reciprocating movement of the rod,
- wherein the conversion mechanism comprises a crank mechanism having a crank pin mounted eccentrically on a first part of the drive shaft, an end of the rod being pivotally attached to the crank pin,
- wherein the rod extends away from the crank pin in a direction that is perpendicular to an axis of rotation of the drive shaft,
- wherein the crank pin comprises a first part mounted eccentrically on the first part of the drive shaft and a second part attaches to the end of the connecting rod, and
- wherein the first and second parts of the crank pin are connected to each other by a dampener.
Dependencies are inferred from the claim text.