Working machine

摘要

A chainsaw as a working machine, which switches among stop, drive, and choke operations of an internal combustion engine, includes an operation lever that is turnable, a turning member turnably combined with the operation lever, and a torsion coil spring holding abutting of the operation lever and the turning member. The turning member is coupled to a choke operating member via a choke rod and is regulated in turning from drive position to stop position. When the operation lever is turned from drive position to choke position, the turning member also turns to move the choke rod, by which the choke operating member closes the choke valve. Meanwhile, the operation lever is turned from drive position to stop position, against the turning force of the torsion coil spring.

主权项

1. A working machine having an internal combustion engine provided as a power source and performing switching among stop, drive, and choke operations of the internal combustion engine, the working machine comprising:
an operation lever turnable to a stop position in which the internal combustion engine is stopped, a drive position in which the internal combustion engine is made to be operational, and a choke position in which the choke operation is performed; a turning member turnably combined with the operation lever; a coupling biasing member that couples the operation lever to the turning member and imparts relative turning forces to both of the operation lever and the turning member; and a choke rod with one end coupled to a choke operating member that operates a choke valve and the other end coupled to the turning member, wherein the operation lever and the turning member are held in a state of abutting each other due to the turning forces imparted by the coupling biasing member, and the turning member is regulated in turning in a direction from the drive position to the stop position, wherein when the operation lever is turned from the drive position to the choke position, the turning member turns along with the operation lever to move the choke rod, and the movement of the choke rod causes the choke operating member to close the choke valve, whereas when the operation lever is turned from the drive position to the stop position, the operation lever moves against the turning force imparted by the coupling biasing member without turning the turning member.