摘要:
According to one embodiment, a throttle adjustment device, for a brush cutter in which an engine is mounted at one end of a handle pipe (1) and in which a throttle adjustment wire (4, 4-2) extends from a throttle of the engine, include: a throttle lever (7) having an operation portion (7-1) to be operated by the user; a sub lever (8) having a holding portion (8-1) to be connected with an extending end of the throttle adjustment wire (4, 4-2); a case (3) to be fixed to the handle pipe (1), the throttle lever (7) and the sub lever (8) being rotatably mounted in the case (3); and a connecting member (10) configured to bring the throttle lever (7) and the sub lever (8) into: an interlocked state where the throttle is adjustable in accordance with an operation amount of the throttle lever (7); or an un-interlocked state where the throttle is not adjustable regardless of the operation amount of the throttle lever (7).
摘要:
A lever device in which a band (12) disposed on one side of an operation handle shaft (1) and a mount stay (4) disposed on the other side of the handle shaft for supporting an operation lever (3) are clamped and fixed with each other through clamp bolts (16), and in which a drum (11c) of an operation mechanism for controlling wire (11) is mounted on a lower portion of the operation lever. In the lever device, a concave portion (17) is formed in an inner surface of either one of the band and stay contacting with a surface of the handle shaft, and a turn-stop member (18, 18A, 18B) having a protruding portion (19) capable of biting into the surface of the handle shaft is fitted in the concave portion whereby an operation lever turn-stop mechanism is constituted so that the operation lever can be effectively prevented from turning even if the stay is not so strongly tightened, and a lock lever (10) for holding the operation lever in an upward turned state is mounted on the operation lever so as to be operated up/down turnably around the drum, a front portion (10b) of the lock lever is urged to turn upward by means of a spring (27) so that the front portion of the lock lever engages with an engagement portion (23) formed in the stay when the operation lever is turned upward, and a finger placing portion (25) is formed at a rear portion of the lock lever so that the finger placing portion projects toward a side of the handle shaft when the lock lever engages with the engagement portion and so that the front portion of the lock lever is disengaged from the engagement portion of the stay when the finger placing portion is pressed against the spring force so that the lock lever is turned downward whereby an operation lever unlock mechanism is constituted so that the operation lock can be unlocked rapidly in case of emergency or the like.
摘要:
According to one embodiment, a throttle adjustment device, for a brush cutter in which an engine is mounted at one end of a handle pipe (1) and in which a throttle adjustment wire (4, 4-2) extends from a throttle of the engine, include: a throttle lever (7) having an operation portion (7-1) to be operated by the user; a sub lever (8) having a holding portion (8-1) to be connected with an extending end of the throttle adjustment wire (4, 4-2); a case (3) to be fixed to the handle pipe (1), the throttle lever (7) and the sub lever (8) being rotatably mounted in the case (3); and a connecting member (10) configured to bring the throttle lever (7) and the sub lever (8) into: an interlocked state where the throttle is adjustable in accordance with an operation amount of the throttle lever (7); or an un-interlocked state where the throttle is not adjustable regardless of the operation amount of the throttle lever (7).
摘要:
A lever device in which a support member (2) is fixed on a handle (1) and an operation lever (4) is rotatably supported on the support member, the lever device comprising an operation lever supporting mechanism and an operation lever locking mechanism. In the operation lever supporting mechanism, a U-shaped shaft bearing groove (11) is integrally formed in the support member so as to constitute a shaft bearing portion between the support member and an outer surface of the handle and a rotary shaft portion (13) is integrally formed on the operation lever (4) so as to act as a center of rotation of the operation lever, the rotary shaft portion being received in the shaft bearing groove so that the operation lever is rotatably supported between the shaft bearing groove and the outer surface of the handle. In the operation lever locking mechanism, common receptacles (15, 21) are formed commonly in the operation lever (4) and a stopper lever (9, 9A) supported on the operation lever so as to receive therein a drum (3c) formed at one end of a control wire (3) so that the stopper lever is supported on the operation lever so as to be rotatable around the drum, whereby the operation lever (4) is locked in a pulled state through the engagement of the stopper lever (9, 9A) with an engagement portion (10) of the support member when the operation lever (4) is pulled. By this configuration, simplification in construction and reduction in cost can be achieved.