Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Hideshi Sasaki

Hiroaki Uchitani

Makoto Warashina

Koji Kasai

Kenjiro Hiratsuna

Keiji Iino

Susumu Okubo

Morihiro Saito

A cutting blade replacement jig for replacing a cutting blade of a utility unit, the cutting blade being attached to a peripheral edge part of a disk by a first fastening member and a second fastening member fastened to the first fastening member, the first fastening member passing through a disk through hole formed in the peripheral edge part and a cutting blade through hole formed in the cutting blade. The cutting blade replacement jig includes: a fastening member holder configured to hold the second fastening member; and a cutting blade holder configured to hold the cutting blade on the second fasting member held in the fastening member holder in a state where a center line of the cutting blade through hole and a center line of the second fasting member are aligned.

Cutting blade replacement jig and method

In a utility vehicle, equipped with a lawnmower work unit having a circular single blade disk rotatable around a rotating shaft connected to an output shaft of a work motor (prime mover) mounted on a chassis, and multiple (three) blades attached to a circumference of the blade disk at equally spaced apart positions, a single second disk is fixed to a middle of the surface of the blade disk of the lawnmower work unit at fixing positions that are spaced apart from each other.

Utility vehicle with noise inhibition

A blade disk in a lawn mower is rotatable about a rotation shaft extending in an up-down direction. A blade protection section for protecting a cutter blade mounted on the blade disk is provided integrally on the blade disk, and the cutter blade has a distal end portion located beneath the blade protection section.

Lawn mower

A lawn mower includes: a blade disk rotatable about a rotation shaft extending in an up-down direction; and a plurality of cutter blades mounted on the blade disk. The blade disk includes a plurality of blade mounting sections having corresponding ones of the cutter blades mounted thereon, and a circumferential high-rigidity section for increasing rigidity of the blade disk between the blade mounting sections. The blade mounting sections are located on, and spaced from each other along, an imaginary reference circle concentric with a rotation center of the blade disk, and the circumferential high-rigidity section is located in such a manner as to interconnect the plurality of blade mounting sections along the reference circle, the circumferential high-rigidity section being formed in a generally concave-convex configuration by being depressed and protruded in a facewise direction of the blade disk.

A hedge trimmer is provided which performs a trimming operation on a hedge. The hedge trimmer includes a machine body, a handle rotatably attached to the machine body, a throttle lever provided in the handle, a locking mechanism for preventing the handle from rotating relative to the machine body, and an unlocking member for unlocking the locking mechanism from the machine body. The unlocking of the locking mechanism from the machine body is effected by a slide movement of the unlocking member towards a rear part of the handle. When unlocking the locking mechanism from the machine body, the unlocking member surrounds the throttle lever so that the throttle lever can be inoperable with the result that the throttle lever is prevented from being erroneously operated during the rotational operation of the handle.

Power working machine

A bush cutter has a driving bevel gear housed in a first box constituting a part of a gearbox, and a driven bevel gear housed in a second box and engaging the driving bevel gear. The driving bevel gear is rotatably retained in a first bearing. The first bearing is screw-fitted into the first box movably in an axially longitudinal direction of the driving bevel gear. Rotation of the first bearing causes the driving bevel gear to move in the axially longitudinal direction to finely adjust the engagement of the driving bevel gear with the driven bevel gear.

Bush cutter

A power working machine has a machine body, a drive source mounted on the machine body for driving a work implement connected to the machine body, and an operating handle mounted on the machine body for undergoing rotation relative to the machine body. A throttle lever is mounted on the operating handle for undergoing pivotal movement to adjust an output of the drive source. A lock mechanism is mounted on the operating handle for locking the operating handle at a preselected rotational angular position relative to the machine body. A lock cancellation lever is mounted on the operating handle for unlocking the lock mechanism to thereby permit rotational movement of the operating handle relative to the machine body. A stopper section is mounted on the operating handle for permitting operation of the lock mechanism while preventing pivotal movement of the throttle lever and for preventing operation of the lock mechanism while permitting pivotal movement of the throttle lever.

A bush cutting machine with a tubular operating pole connected to an outlet of an exhaust muffler and doubling as an exhaust passage is provided. Exhaust gases discharged from an engine flow from the exhaust muffler through the operating pole and are then discharged into the air. The substantial capacity of the exhaust muffler is increased by the operating pole, and the exhaust noise of the engine is reduced.

Bush cutting machine

A vegetation cutting machine has a tubular operation rod, a motor mounted to an end of the operation rod, a drive shaft extending through the operation rod and driven by the motor, a cutting tool provided at a distal end of the operation rod to undergo rotation with the drive shaft, a handle mounted on the operation rod, and a pair of handgrips provided on distal ends of the handle. Each of a pair of fastener members traverses the handle and a respective one of the handgrips for fixedly mounting the respective handgrip to the handle at a point located substantially at a center of gravity of a sum of a mass of the respective handgrip and a mass of a portion of the handle extending between the fixing point and a respective one of the distal ends of the handle, such that the fastener members of the respective handgrips are located at positions of the handle at which vibrations transmitted to the handle from the motor through the operation rod are minimized.

A power working machine has a machine body, trimming blades attached to the machine body and drivable by a drive source, an operating handle rotatably mounted on the machine body, a throttle lever disposed on the operating handle, and a throttle lock lever disposed on the operating handle for disabling pivotal movement of the throttle lever. The operating handle has a lock mechanism for locking the operating handle at a rotational position relative to the machine body, and an operation lever for unlocking the lock mechanism to thereby permit rotational movement of the operating handle and, simultaneously with the unlocking of the lock mechanism, for placing the throttle lock lever in a locking position to disable pivotal movement of the throttle lever. The throttle lock lever has a lock portion for permitting pivotal movement of the throttle lever while simultaneously locking the operation lever of the operating handle.

A portable working machine has a motive power source for producing a rotational motion, a cutting blade mounted to undergo linear reciprocating motion, and a reduction mechanism for reducing a speed of the rotational motion produced by the motive power source. A motion conversion mechanism converts the rotational motion reduced in speed by the reduction mechanism into a linear reciprocating motion of the cutting blade. A case accommodates therein the reduction mechanism and the motion conversion mechanism and has a lower surface. A cover member covers the lower surface of the case. The cover member has a first part connected to the lower surface of the case and a second part contiguous to the first part and extending to underlie a part of the lower surface of the case located below the reduction mechanism with a space defined between the part of the lower surface of the case and the second part of the cover member. An impact-absorbing member is disposed in the space between the part of the lower surface of the case and the second part of the cover member.

Portable working machine

A drive shaft extends into a tubular member for use in a portable working machine. The drive shaft is mounted relative to the tubular member so as to undergo rotation relative to the tubular member. The drive shaft has a longitudinal axis and resin bushes integrally mounted on the drive shaft for rotation therewith at positions along the longitudinal axis corresponding to vibration nodes of the drive shaft. Each of the resin bushes has an outer peripheral surface disposed in slidable contact with an inner peripheral surface of the tubular member.

Drive shaft for use in portable working machine

A bush cutting machine including a prime mover, a cutter and a handle fixed to an operation rod. The handle has left and right end portions carrying grips. Each grip is mounted at a center of gravity of a sum of a mass of a handle portion between a fixed point and a distal end of the handle and a mass of the grip.

A plant cutter apparatus has a tubular handling rod having a first end portion and a second end portion. A drive shaft extends through the handling rod and is mounted for undergoing rotation. A drive source unit is mounted on the first end portion of the handling rod for rotationally driving the drive shaft. A cutter blade is connected to the drive shaft for rotation therewith. A clutch case has a first mounting portion connected to the first end portion of the handling rod, a flexible coupling portion extending from the first mounting portion toward the drive source unit, and a second mounting portion extending from the flexible coupling portion and connected to drive source unit. The second mounting portion has an axial fitting hole for receiving the first end portion of the handling rod so that the first end portion of the handling rod is axially slid able therein. The first mounting portion, the flexible coupling portion and the second mounting portion of the clutch case extend sequentially along an axis of the drive shaft when viewed in a direction from the cutting blade toward the drive source unit.

Plant cutter apparatus

A plant cutter apparatus has a one-piece handling rod having an outer pipe portion, an inner pipe portion disposed concentrically within the outer pipe portion, and first, second and third radial stay portions extending between and interconnecting the outer pipe portion and the inner pipe portion. The first, second and third radial stay portions are arranged at non-equal angular intervals such that an angle &thgr;1 formed between the first and second stay portions, an angle &thgr;2 formed between the second and third stay portions, and an angle &thgr;3 formed between the third and first stay portions differ from each other. A drive shaft extends through the inner pipe portion and is rotatably supported within the inner pipe portion via a bushing disposed between the drive shaft and the inner pipe portion. A drive source unit is mounted at one end of the handling rod for rotating the drive shaft. A cutter blade is mounted at another end of the handling rod and is connected to the drive shaft for rotation therewith.

Growing community of inventors

Wako, Japan

Hideshi Sasaki