Power tool having a hammer mechanism
AssigneeMakita Corporation
InventorsYoshiro Tada, Masanori Furusawa, Kei Watanabe
Life of this patent
Estimating the term…
Abstract
A power tool includes a motor, a hammer mechanism, and a housing. The motor has a motor shaft that rotates around a motor axis. The hammer mechanism includes a cylinder and a hammer element adjacent to an air chamber defined within the cylinder and is configured to convert rotary motion of the motor shaft to linear motion of the hammer element along a prescribed hammer axis by utilizing action of an air spring of the air chamber. The housing houses the motor and the hammer mechanism. The motor axis is arranged to be parallel to the hammer axis and to pass through the inside of the cylinder.
Claims12
A power tool, comprising:
- a motor having a motor shaft that rotates around a motor axis;
- a hammer mechanism that includes a cylinder and a hammer element adjacent to an air chamber defined within the cylinder and is configured to convert rotary motion of the motor shaft to linear motion of the hammer element along a prescribed hammer axis by utilizing action of an air spring of the air chamber;
- a housing that houses the motor and the hammer mechanism,
- wherein the motor axis is parallel to the hammer axis and to pass through an inside of the cylinder;
- and
- a main handle that includes (i) a grip part configured to be held by a user, (ii) a first connection part that connects a first end of the grip part to the housing, and (iii) a second connection part that connects a second end of the grip part to the housing, wherein:
- the hammer axis passes through between the first end and the second end of the grip part when the power tool is viewed in a direction orthogonal to the hammer axis,
- the hammer mechanism further includes (i) a second bevel gear that is engaged with a first bevel gear provided on the motor shaft, and (ii) a crank shaft that rotates together with the second bevel gear, and
- an extending direction of the grip part is (i) parallel to a plane orthogonal to a rotational axis of the second bevel gear and (ii) crosses the hammer axis.
Dependencies are inferred from the claim text.