US 12,122,020 B2
Impact tool
Ding Zhao, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Oct. 27, 2022, as Appl. No. 17/975,157.
Claims priority of application No. 2021-202909 (JP), filed on Dec. 14, 2021.
Prior Publication US 2023/0182271 A1, Jun. 15, 2023
Int. Cl. B25B 21/02 (2006.01)
CPC B25B 21/026 (2013.01) 17 Claims
OG exemplary drawing
 
1. An impact tool, comprising:
a motor;
a hammer rotatable by the motor;
an anvil strikable by the hammer in a rotation direction, the anvil being configured to receive a tip tool;
an elastic member having a front end supporting the hammer, the elastic member being extendable and contractable in a front-rear direction to apply an elastic force to the hammer toward the anvil; and
a positioner supporting a rear end of the elastic member, the positioner being configured to change a support position of the positioner supporting the rear end of the elastic member in the front-rear direction, wherein:
the positioner switches the support position between a plurality of positions in the front-rear direction,
the positioner includes a cam member rotatable in response to rotation of the motor and movable in the front-rear direction, and
the rear end of the elastic member is supported by the cam member.