Honda Giken Kogyo Kabushiki Kaisha

Atsushi Miyazaki

Takao Nishida

Keita Ito

Hiroshi Sueshige

Kenjiro Hiratsuna

Takashi Ikeda

Atsushi Kojima

Kenji Higashi

Naotoshi Ono

Tetsuya Arai

Kazuyoshi Miyahara

Yasumi Fukuzumi

Hiroo Kanke

Hirohide Shimizu

Yasunori Yamamoto

Tadayuki Yoneyama

Masayuki Yamamoto

Teruhiko Otsuki

Hideyuki Sakamoto

A crankcase is coupled to a lower end face of a cylinder block of an engine and includes first and second case halves coupled to each other in a plane perpendicular to joint surfaces of the cylinder block and the crankcase. A U-shaped seal groove is defined in one of the joint surfaces of the case halves. Enlarged recesses are made at opposite ends of the seal groove. A bar-shaped seal member having enlarged end portions formed at opposite ends thereof is mounted in the groove such that the enlarged end portions are filled in the enlarged recesses. Thus, it is possible to ensure accuracy of the positioning of the bar-shaped seal member without the need for a high level skill; thereby, reliably sealing portions of intersection between the joint surfaces of the cylinder block and the crankcase and the joint surfaces of the case halves of the crankcase.

Seal structure in engine body

A 4-cycle engine includes an oil tank mounted to one side of an engine body, and an oil slinger accommodated in the oil tank and adapted to scatter an oil stored in said oil tank to generate a lubricating oil mist. In the 4-cycle engine, a timing transmitting case is interposed between the engine body and the oil tank, so that heat transmission from the engine body to the oil tank is shielded. Thus, the oil tank can be disposed at a location spaced apart from the engine body without bringing about an increase in size of the engine, thereby suppressing the heat transmission from the engine body to the oil tank to the utmost to prevent overheating of the oil in the oil tank.

4-cycle engine

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 motor-assisted single-wheel cart is provided with a motor for generating an assisting power in response to an operation force when operating an operation handle by a human hand, and a power transmission mechanism for transmitting an output of the motor to an axle. The motor is arranged rearwardly upwardly of the axle so as to be positioned within a space surrounded by an upper horizontal member and a lower member positioned below the upper horizontal member constituting a vehicle body frame constituting the cart as viewing the vehicle body frame from a side surface thereof. The power transmission mechanism has a first speed reduction mechanism arranged near the motor, a second speed reduction mechanism arranged near the wheel and a transmission shaft for connecting them. The transmission shaft is inserted to the first and second speed reduction mechanisms so as to be capable of being drawn out.

Motor-assisted single-wheel cart

A four-wheeled-electromotive cart includes a single motor and a direct axle driving mechanism for driving the axle of left and right front wheels by means of the motor. The single electric motor would cause no rotation speed difference between the left and right front wheels and hence constantly permits a smooth linear movement of the electromotive cart. The direct axle driving mechanism includes a relay shaft connected to the output shaft of the electric motor, a small-diameter bevel gear mounted on a lower end of the relay shaft, and a large-diameter bevel gear engaging with the small-diameter bevel gear. The front-wheel axle is spline-connected to the large-diameter bevel gear so as to be driven by the motor via the direct axle driving mechanism. Thus, the electromotive cart is allowed to smoothly start moving without sudden jolts or shocks caused by start of the motor rotation.

Electromotive cart

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

Growing community of inventors

Wako, Japan

Atsushi Miyazaki