Power tool
AssigneeMakita Corporation
InventorTakafumi Kotsuji
Life of this patent
Estimating the term…
Abstract
A power tool includes a spindle, holding members each having a claw, a biasing member, and a locking member. The holding members are movable between a first position, in which the holding members fixedly hold a tool accessory against a tool mounting part of the spindle with the claws pressed against the tool accessory owing to a biasing force of the biasing member, and a second position, in which the holding members do not impede or block attachment or detachment of the tool accessory. The locking member is configured to move between a locking position, in which the locking member abut on the claws of the holding members to hold the holding members in the second position, and an unlocking position, in which the locking member does not impede or block the holding members from moving from the second position to the first position.
Claims20
A power tool configured to perform a processing operation on a workpiece by driving a tool accessory in an oscillating manner, the power tool comprising:
- a spindle configured to be driven about a driving axis with a pivotal oscillating motion within a specified angle range, the driving axis defining an up-down direction of the power tool, and a tool mounting part to which the tool accessory is removably attachable being defined at a lower end portion of the spindle;
- a plurality of holding members each having a claw, the holding members being movable relative to each other between a first position in which the claws of the holding members are located farther apart from each other and a second position in which the claws of the holding members are located closer to each other than in the first position;
- a biasing member generating a biasing force imparted to the holding members to urge the holding members toward the first position;
- and
- a locking member configured to move between a locking position and an unlocking position,
- wherein:
- when the holding members are in the first position, the holding members fixedly hold the tool accessory against the tool mounting part with the claws pressed against the tool accessory owing to the biasing force of the biasing member,
- when the holding members are in the second position, the holding members do not impede or block attachment of the tool accessory on the tool mounting part or detachment of the tool accessory from the tool mounting part,
- when the locking member is in the locking position, the locking member abuts on the claws of the holding members to hold the holding members in the second position, and
- when the locking member is in the unlocking position, the locking member does not impede or block the holding members from moving from the second position to the first position.
A power tool comprising:
- a spindle configured to be driven about a driving axis with a pivotal oscillating motion within a specified angle range, the driving axis defining an up-down direction of the power tool,
- a tool mounting part defined at a lower end portion of the spindle in the up-down direction and configured to contact a tool accessory;
- a plurality of tool accessory holders partially disposed within the spindle, each of the tool accessary holders having a tool accessory clamping surface that is movable between a first position and a second position;
- a biasing member that generates a biasing force imparted to the tool accessory holders to urge the tool accessory clamping surfaces toward the first position;
- and
- a sleeve disposed coaxially with the spindle;
- wherein:
- the tool accessory clamping surfaces are spaced farther apart from each other in the first position than in the second position,
- in the first position, the tool accessory clamping surfaces are configured to press and hold the tool accessory against the tool mounting part utilizing the biasing force of the biasing member,
- in the second position, the tool accessory holders do not impede or block the tool accessory from being attached to or detached from the tool mounting part,
- the sleeve and the tool accessory holders are movable relative to each other between a blocking position and a non-blocking position,
- in the blocking position, the sleeve impedes or blocks the tool accessory clamping surfaces from moving from the second position to the first position,
- in the non-blocking position, the sleeve does not impede or block the tool accessory clamping surfaces from moving to the first position, and
- the sleeve is configured to move in the up-down direction relative to the spindle between the blocking position and the non-blocking position while the sleeve and the tool accessory holders move relative to each other.
Dependencies are inferred from the claim text.