| 主权项 |
1. A reciprocating power tool comprising:
a reciprocating cutting mechanism including a pair of blades with interleaving blade teeth, the reciprocating cutting mechanism arranged to be driven by a motor via a driving assembly, wherein the driving assembly includes a resilient arrangement arranged to be charged when the cutting mechanism is driven by the motor and, whereupon the drive from the motor is terminated, the resilient arrangement is arranged to reverse the cutting mechanism from a direction of the drive from the motor; wherein the resilient arrangement includes a torsion spring arranged to be charged by friction between the torsion spring and the driving assembly when the cutting mechanism is driven by the motor and discharged when the drive from the motor is terminated to reverse the cutting mechanism; and wherein the driving assembly further comprises:
a gear member with a first through-hole and a recess, the recess defining a first part of a chamber with an upper inner wall for contacting at least part of the torsion spring;a cover member with a second through-hole and a protruding rib, the protruding rib defining a recess that forms a second part of the chamber with a lower inner wall for contacting a remaining part of the torsion spring;two eccentric cams each having an opening and are each connected with one of the blades; andan output shaft arranged to connect and extend through the first through-hole of the gear member, the torsion spring, the second through-hole of the cover member, and the openings of the eccentric cams for transmitting rotations between components of the driving assembly. |
