US 11,833,653 B2
Power tool having hammer mechanism
Yoshitaka Machida, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Feb. 9, 2022, as Appl. No. 17/668,059.
Claims priority of application No. 2021-025937 (JP), filed on Feb. 22, 2021.
Prior Publication US 2022/0266435 A1, Aug. 25, 2022
Int. Cl. B25D 17/04 (2006.01); B25D 16/00 (2006.01)
CPC B25D 17/043 (2013.01) [B25D 16/00 (2013.01); B25D 2250/121 (2013.01); B25D 2250/371 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A power tool having a hammer mechanism configured to linearly drive a tool accessory along a driving axis defining a front-rear direction, the power tool comprising:
a tool body extending along the driving axis;
a motor housed in the tool body and including a motor shaft, the motor shaft being rotatable around an axis parallel to the driving axis;
a handle (i) connected to the tool body to be pivotable relative to the tool body and to be movable in at least the front-rear direction relative to the tool body and (ii) including a cover part and a grip part, the cover part having a cylindrical shape at least in part and covering a portion of the tool body, the grip part extending in a cantilever manner from the cover part in a direction intersecting the driving axis;
at least one biasing member (i) between the tool body and the handle and (ii) configured to bias the tool body and the handle away from each other in the front-rear direction; and
at least one guide part, the at least one guide part includes (i) at least one front guide part and (ii) at least one rear guide part that is closer to the grip part than the at least one front guide part in the front-rear direction;
each of the at least one guide part including (i) a first portion of the tool body covered by the cover part, (ii) a second portion of the cover part of the handle and connected to the first portion to be movable in at least the front-rear direction relative to the first portion, (iii) an elastic member that elastically connects the first portion and the second portion, and (iv) a holder configured to hold the elastic member, wherein:
a first one of the first and second portions of each of the at least one guide part is a recess or a through hole that extends in the front-rear direction;
a second one of the first and second portions is a protrusion that protrudes into and is slidable within the recess or the through hole; and
an elastic deformation property of the elastic member of the at least one front guide part is different from elastic deformation property of the elastic member of the at least one rear guide part.