Honda Giken Kogyo Kabushiki Kaisha

Honda Kogyo Kabushiki Kaisha

Atsushi Kojima

Kenjiro Hiratsuna

Takao Kobayashi

Takashi Ikeda

Akito Kono

Kenji Higashi

Tomomi Nakaya

Atsushi Miyazaki

Takanori Suzuki

Makoto Warashina

Gunji Saito

Kazuo Saruhashi

Masato Ara

A bush cutting machine including has an operation rod, a cutter blade mounted to the front end of the operation rod for undergoing rotation, and a prime mover mounted to the rear end of the operation rod for rotationally driving the cutter blade. A throttle lever is pivotally mounted with respect to the operation rod for controlling an opening degree of a throttle valve of the prime mover to adjust a rotational speed of the cutter blade. A brake unit stops rotation of the cutter blade. A link mechanism is disposed in close proximity to the prime mover and is actuated by operation of the throttle lever to adjust the degree of opening of the throttle valve of the prime mover and to release the brake unit from a braking condition.

Bush cutting machine

A bush cutting machine has a relay member mounted to undergo movement by actuation of a throttle lever to adjust the opening degree of a throttle valve and to release a brake unit from a braking condition. A first wire has first and second ends each connected to a respective one of the throttle lever and a first portion of the relay member so that pivotal movement of the throttle lever pulls the second end of the first wire in a pulling direction from a standby condition to an operative condition. A first end of each of second and third wires is connected to a respective one of the throttle valve and the brake unit.

An operational lever for a bush cutter includes a handle housed in a handle case, a throttle lever pivotally mounted to the handle, and a lock lever pivotally mounted to the handle. The operational lever further includes a torsional coil spring which exerts a resilient force on the lock lever. The lock lever is pivoted from an initial position to a pivoted position by an operator's palm. The throttle lever is then pivoted to a half-pivoted position by operator's fingers. When the palm is moved a small distance away from the handle case with the throttle lever held in the half-pivoted position, the lock lever is pivoted back towards the initial position by a resilient force of the spring. This causes a curved surface of a side protrusion portion of the lock lever to engage or abut on a side of a protrusion portion of the throttle lever. This arrangement is advantageous in that even when the operator takes her or his fingers off the throttle lever, the throttle lever is locked by a friction force produced between the curved surface and the side.

Operational lever for bush cutter

A bush cutting machine including an automatic braking mechanism having a brake drum formed integrally with a clutch case which houses a centrifugal clutch. When the number of rotations of a clutch drum decreases, at least two braking members press against the brake drum, whereby the clutch drum stops rotating, and a cutting blade also stops rotating automatically.

An operation-control lever unit for regulating engine power of an engine-powered working machine to control operation of a working tool includes a throttle-lever holding mechanism operative in response to pivotal movement of a lock lever in a locking direction to frictionally hold the throttle lever at a desired position. The throttle-lever holding mechanism includes a stationary cam formed integrally with the head portion of the operator's control handle for the machine, a movable cam on the lock lever and cooperating with the stationary cam to displace the lock lever along a support shaft in a direction away from the stationary cam, and a resilient member disposed behind the movable cam and resiliently urging the movable cam toward the stationary cam.

Operation-control lever unit for engine-powered working machine

An operation control lever unit for regulating power of an engine of an engine-powered working machine has a handle case attached to a support rod connected at one end to the engine and at the other end to a working tool, a throttle lever pivotally mounted to the handle case for controlling a throttle mechanism to regulate the engine speed, and a brake release lever pivotally mounted to the handle case in diametrically opposite relation to the throttle lever for releasing a brake mechanism associated with the engine. This arrangement enables the operator to manipulate the throttle lever using at least one finger excluding the thumb of its one hand and to depress the brake release lever with a palm of the same hand while maintaining a grip on the handle case.

Operation control lever unit for engine-powered working machine

A knapsack type working machine has a first frame and a second frame. A prime mover for driving a working instrument is carried on the first frame. The second frame has a back pad and shoulder straps. The first frame and the second frame are separable from each other. The first frame has a locking engagement member. The second frame engages with the locking engagement member and has a pivotal locking member urged by a spring in a direction of engagement with the locking engagement member. By releasing the locking engagement member from engagement with the pivotal locking member, the first frame is separated from the second frame.

Knapsack type working machine

A bush cutting machine comprises a clutch case attached to a front part of an engine, an operation rod extending forwardly from the clutch case and having a brake lever, a cutting blade provided at a distal end of the operation rod, and a transmission shaft passing through the operation rod for transmitting drive power to the cutting blade. A brake drum is housed in the clutch case for braking the rotation of the cutting blade. A brake arm is swingably attached to a front wall of the clutch case closely to the brake drum. The brake arm carries at one end thereof a brake shoe for press contacting an outer peripheral surface of the brake drum. A brake wire is mounted between the brake lever and brake arm. The brake wire is disposed to extend along either external surface of the operation rod.

Hand-held, engine-powered bush cutting machine

An operation lever unit includes an operation handle attached to an operating rod of an engine-powered portable working machine. The operation handle is equipped with a throttle lever for regulating the power of an engine, a lock lever for holding the throttle lever in a desired position, and a secondary throttle adjustment lever for achieving a fine adjustment of the position of the throttle lever. To hold the throttle lever in the desired position, the throttle lever is forced against a portion of the operation handle by the action of a thrust cam mechanism disposed between the throttle lever and the lock lever. For achieving the fine adjustment of the throttle lever position, the secondary throttle adjustment lever is forced by a thumb of the operator to forcibly turn the throttle lever against a frictional force acting between the throttle lever and the handle portion.

Operation lever unit for engine-powered working machine

A riding type mower includes steered front wheels and driven rear wheels arranged in the front and rear parts of a vehicle body, respectively, a mowing cutter mechanism disposed under the vehicle body, a driver's seat disposed on the vehicle body, and an engine for driving the rear wheel and the mowing cutter mechanism. The driver's seat is disposed substantially at the longitudinally central part of the vehicle body, the engine is disposed below the driver seat, a fuel supply system of the engine is disposed at one side of the engine, and an exhaust system of the engine is disposed at the other side of the engine. Power of the engine is transmitted through a pulley belt to an input shaft of a transmission gearing for the rear wheels, with the transmission gearing being disposed behind a rear axle, and concurrently from the input shaft through another pulley belt to the cutter mechanism which is level-adjustably disposed substantially in the longitudinal central part of the vehicle body. The cutter mechanism housing has a maximum transverse width of dimension less than the distance within the respective transversely outside faces of the rear wheels. The cutter housing is disposed substantially in the longitudinally central part of the vehicle body, while the engine is disposed within a contour of the cutter housing as viewed from above.

Growing community of inventors

Wako, Japan

Atsushi Kojima