Patent ID: 9434062
Filing Date: 2016-09-06
CPC Classification: B25D,B25F

Claim Text:
1. A power tool comprising: a motor configured to rotate an output member about a rotation axis and linearly drive a tool in a direction of a longitudinal axis of the tool to perform a hammering operation, the rotation axis extending in the direction of the longitudinal axis of the tool; a first housing to which the tool is attached at a first end of the first housing and which has a first cylindrical portion at a second end, the first cylindrical portion having a longitudinal axis extending in the direction of the rotation axis; a second cylindrical portion covering the first cylindrical portion and a grip portion extending from the second cylindrical portion in a direction crossing the direction of the longitudinal axis of the tool, the second cylindrical portion being movable relative to the first cylindrical portion, the first housing comprising a slide guide that guides the second housing to be slid in contact with the slide guide in the direction of the longitudinal axis of the tool; and a vibration reduction member which is provided between the first cylindrical portion and the second cylindrical portion such that the vibration reduction member reduces the transmission of vibration between the first housing and the second housing via elastic shearing deformation of the vibration reduction member to a greater effect than by axial deformation of the vibration reduction member, wherein a direction of the shearing deformation of the vibration reduction member corresponds to the direction of the rotation axis, and wherein the motor is entirely or partially housed in the first housing wherein a cooling air passage is formed by means of a gap between the first cylindrical portion and the second cylindrical portion, wherein the vibration reduction member is located at the cooling air passage and cooled by an air flowing through the cooling air passage, which flowed by means of a cooling motor fan to cool the motor, wherein the cooling motor fan is housed in the first housing together with the motor, and wherein the second housing has a grip portion held by a user of the power tool, wherein the grip portion extends in a direction crossing a longitudinal direction of the second housing from one end of the second cylindrical portion opposite to the first end where the tool is attached and wherein a distal end of the grip portion is defined as a free end, wherein the cooling motor fan is provided closer to the tool than the motor, wherein the vibration reduction member is provided between the motor and the cooling motor fan.