Power tool having a hammer mechanism
A power tool includes a motor, a hammer mechanism, a housing, and a handle. The motor has a motor shaft that rotates around a motor axis. The hammer mechanism includes a cylinder and a hammer element 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 an air chamber. The housing has a front end part including a front end surface to which a tool accessory is mounted, and a rear end part including a rear surface on the opposite side to the front end surface The handle is configured to be held by a user. The motor axis and the hammer axis are parallel to each other. The rear end of the handle is arranged on the rear end part.
1 . 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 converts rotary motion of the motor shaft to linear motion of the hammer element along a hammer axis by utilizing action of an air spring of the air chamber;
a housing that (i) has a front-end part including a front-end surface and to which a tool accessory is mounted, and a rear-end part including a rear surface on the opposite side to the front-end surface, and (ii) houses the motor and the hammer mechanism; and
a handle that is configured to be held by a user,
wherein:
the motor axis and the hammer axis are parallel to each other,
a rearmost part of the handle is arranged on the rear-end part of the housing, and
the rearmost part of the handle is formed continuously to the rear surface of the housing.
2 . The power tool as defined in claim 1 , wherein the rear-end part of the housing includes a motor housing that houses the motor.
3 . The power tool as defined in claim 1 , further comprising
a battery mounting part configured such that a battery for supplying power to the motor is removably attached thereto,
wherein:
the hammer axis passes through the battery mounting part.
4 . The power tool as defined in claim 1 , wherein the hammer axis passes through the motor.
5 . The power tool as defined in claim 1 , wherein:
the hammer mechanism includes a motion converting part that converts rotary motion of the motor shaft into linear motion of the hammer element, and
the handle is connected to a side surface of the housing, and arranged on the opposite side to the motion converting part across the hammer axis.
6 . The power tool as defined in claim 5 , further comprising:
a battery mounting part that is provided on the rear-end part of the housing and configured such that a battery for supplying power to the motor is removably attachable thereto,
wherein:
an attaching/detaching direction of the battery to/from the battery mounting part crosses the hammer axis and passes through the handle.
7 . The power tool as defined in claim 1 , wherein at least a part of the handle overlaps at least a part of the hammer mechanism, when the power tool is viewed from above in a direction orthogonal to the motor axis and passing through the handle and the hammer mechanism.
8 . The power tool as defined in claim 1 , wherein the handle includes (i) a rear connection part that connects the rearmost part of the handle to the rear-end part of the housing, (ii) a front connection part that connects a front end of the handle to a side surface of the housing, and (iii) a grip part that connects the rear connection part and the front connection part.
9 . The power tool as defined in claim 8 , wherein the grip part is inclined relative to the hammer axis from the rear-end part toward the front-end surface in a direction away from the hammer axis.
10 . The power tool as defined in claim 8 , wherein the length of the grip part along the hammer axis is a half or more of the length of the housing between the front-end surface and the rear surface.
11 . The power tool as defined in claim 1 , wherein:
the handle includes a connection part that connects the rearmost part of the handle to the rear-end part of the housing, and a grip part that extends from the connection part in an extending direction crossing the hammer axis,
the extending direction has a first direction component in a direction orthogonal to the hammer axis and a second direction component in a direction along the hammer axis, and
the first direction component is greater than the second direction component.
12 . The power tool as defined in claim 11 , wherein:
a front end of the handle is spaced apart from the housing, and
the grip part has a protruding part protruding from the grip part in a protruding direction crossing the extending direction.
13 . The power tool as defined in claim 11 , wherein an angle between the extending direction and the hammer axis is 45 degrees or more and less than 90 degrees.
14 . The power tool as defined in claim 11 , further comprising:
an antislip part on a side surface of the housing, wherein
the antislip part is protruding outward from the side surface.
15 . The power tool as defined in claim 14 , wherein the antislip part is arranged in the front-end part of the housing.
16 . The power tool as defined in claim 1 , further comprising a light emitting part that is configured to emit light toward a working area.
17 . The power tool as defined in claim 1 , wherein the rearmost part of the handle is on a same plane as the rear surface of the housing.
18 . The power tool as defined in claim 1 , wherein a top point of the handle is positioned forward of a frontmost part of a rear connection part that connects the rearmost part of the handle to the rear-end part of the housing.
19 . 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 converts rotary motion of the motor shaft to linear motion of the hammer element along a hammer axis by utilizing action of an air spring of the air chamber;
a housing that (i) has a front-end part including a front-end surface and to which a tool accessory is mounted, and a rear-end part including a rear surface on the opposite side to the front-end surface, and (ii) houses the motor and the hammer mechanism; and
a handle that is configured to be held by a user,
wherein:
the motor axis and the hammer axis are parallel to each other,
a rearmost part of the handle is arranged on the rear-end part of the housing, and
the rearmost part of the handle is connected to at least part of a battery mounting part that is provided on the rear-end part of the housing and configured such that a battery for supplying power to the motor is removably attachable thereto.
20 . The power tool as defined in claim 19 , wherein an outer periphery of a motor housing that houses the motor functions as the handle.