Power tool having hammer mechanism

A power tool, comprising:

• a final output shaft configured to be rotatable around a driving axis defining a front-rear direction of the power tool, the final output shaft including a cylinder and a tool holder that is configured to removably hold a tool accessory so that the tool accessory is linearly movable along the driving axis and is rotatable by the final output shaft;
• a motor having a motor shaft extending in parallel to the final output shaft and having a driving gear;
• a first intermediate shaft extending in parallel to the final output shaft and having a first driven gear directly meshing with the driving gear;
• a second intermediate shaft extending in parallel to the first intermediate shaft and having a second driven gear directly meshing with the driving gear;
• a motion-converting mechanism configured to convert rotation of the first intermediate shaft into linear reciprocating motion that linearly reciprocally drives the tool accessory along the driving axis;
• a rotation-transmitting mechanism configured to transmit rotation of the second intermediate shaft to the final output shaft and rotationally drive the tool accessory around the driving axis;
• and
• a first clutch mechanism operably coupled between the first intermediate shaft and the final output shaft, the first clutch mechanism having a first transmitting member configured to selectively enable and disable hammering of the tool accessory;
• wherein:
• the motion-converting mechanism includes:
• a piston that is operably connected to the motor shaft and is configured to be reciprocally slidable within and relative to the cylinder along the driving axis,
• a rotary body disposed around the first intermediate shaft and operably coupled to the first clutch mechanism, and
• an oscillating member disposed around the rotary body and operably coupled to the piston, the oscillating member being configured to oscillate in parallel to the driving axis and thereby generate reciprocating linear motion of the piston in response to rotation of the rotary body;
• the rotation-transmitting mechanism includes:
• a third gear operably coupled to the second intermediate shaft, and
• a fourth gear operably coupled to the cylinder and meshing with the third gear;
• the second intermediate shaft is configured to rotate the cylinder via the third gear and the fourth gear to transmit power that rotationally drives the final output shaft and the tool accessory;
• the first transmitting member of the first clutch mechanism is engaged with a spline part of the first intermediate shaft frontward of the rotary body such that the first transmitting member is movable in the front-rear direction relative to the first intermediate shaft;
• and
• a plane (i) orthogonally intersects the first intermediate shaft, (ii) contains a forwardmost edge of the spline part in the front-rear direction and (iii) intersects the third gear on the second intermediate shaft.

A power tool, comprising:

• a final output shaft configured to removably hold a tool accessory and to be rotatable around a driving axis;
• a motor having a motor shaft extending in parallel to the final output shaft;
• a first intermediate shaft extending in parallel to the final output shaft and configured to be rotated around a first axis in response to rotation of the motor shaft;
• a first driving mechanism configured to convert rotation of the first intermediate shaft into linear reciprocating motion to hammer the tool accessory along the driving axis;
• an intervening member disposed coaxially around the first intermediate shaft, the intervening member being selectively rotatable relative to the first intermediate shaft around the first axis to selectively transmit the rotation of the first intermediate shaft to the first driving mechanism, the intervening member also being immovable relative to the first intermediate shaft along the first axis;
• a second intermediate shaft extending in parallel to the first intermediate shaft and in parallel to the final output shaft, the second intermediate shaft being configured to be rotated around a second axis in response to rotation of the motor shaft;
• a second driving mechanism configured to transmit rotation of the second intermediate shaft to the final output shaft to rotationally drive the tool accessory around the driving axis;
• a driving gear attached to the motor shaft;
• a first driven gear attached to the first intermediate shaft and directly meshing with the driving gear;
• and
• a second driven gear attached to the second intermediate shaft and directly meshing with the driving gear;
• wherein:
• the first intermediate shaft is configured for solely transmitting power for hammering the tool accessory and not for rotationally driving the tool accessory,
• the second intermediate shaft is configured for solely transmitting power for rotationally driving the tool accessory and not for hammering the tool accessory, and
• in a plane orthogonal to the driving axis, an obtuse angle is formed between a first line segment connecting a rotation axis of the motor shaft and the first axis of the first intermediate shaft and a second line segment connecting the rotation axis of the motor shaft and the second axis of the second intermediate shaft.