Hammer tool
AssigneeMakita Corporation
InventorYonosuke Aoki
Life of this patent
Estimating the term…
Abstract
A hammer tool for hammering on a workpiece by a tool bit moving at least linearly in a longitudinal direction of the tool bit, configured so that a hammering element moves toward the tool bit to hits the tool bit by way of air pressure fluctuation in an air chamber when a driving element is moved from a first position to a second position. In addition, the stroke center position of the reciprocating movement of the driving element moved between the first position and the second position is configured to be changeable.
Claims21
An hammer tool which at least linearly drives a tool bit at least linearly in a longitudinal direction of the tool bit and performs a hammering operation on a workpiece, comprising:
- a main body,
- a cylinder which is arranged in the main body and extended in the longitudinal direction of the tool bit,
- a hammering element which drives linearly in the longitudinal direction of the tool bit in the cylinder and hits the tool bit,
- a driving element which is slidably arranged in the cylinder and is configured to moves the hammering element, and
- a driving apparatus which drives the driving element,
- wherein the driving element is arranged inside the cylinder such that it reciprocally moves between a first position which is remote from the tool bit and a second position which is close to the tool bit,
- when the driving element is moved from the first position to the second position, the driving element moves the hammering element toward the tool bit and the hammering element hits the tool bit, and
- a stroke center position of a reciprocating movement of the driving element which is reciprocally moved between the first position and the second position is configured to be changeable.
An hammer tool in which a tool bit drives at least linearly in a longitudinal direction of the tool bit and performs a hammering operation on a workpiece, comprising:
- a main body,
- a cylinder which is arranged inside the main body,
- a hammering element which is slidably arranged within the cylinder,
- a driving element which is slid inside the cylinder and drives the hammering element,
- a connection rod which is connected to the driving element,
- a crank mechanism which is connected to the connection rod and drives a piston as the driving element,
- wherein while the driving element is moved from a bottom dead center which is the most remote from the tool bit to a top dead center which is the closest to the tool bit, a straight line passing a connecting part of the connection rod and the driving element and a connecting part of the connection rod and the crank mechanism is arranged to be parallel to the cylinder.
Dependencies are inferred from the claim text.