Honda Giken Kogyo Kabushiki Kaisha

Tsuneo Kajikawa

Yuichiro Tsuruta

Akio Handa

Michio Nakamura

Tsutomu Takeuchi

Kosuke Asao

Yoshiaki Hamada

Shokichi Arai

Shinji Matsubayashi

Masahiro Kawamata

Ikuo Ariga

Toshihiko Okunosono

Masao Shinada

A body frame structure for a four-wheeled buggy which is constructed by separately preparing the front sub-assembly and the rear sub-assembly and fastening the rear sub-assembly to the front sub-assembly. The front sub-assembly is composed of a pair of sub-assembly parts each of which is formed as an approximate loop shape including a main frame, a front down frame, a lower frame, and a center frame. Rear ends of the main frames are welded to upper ends of the center frames via a cross pipe. Brackets are provided on upper portions of the center frames in such a manner as to extend upwardly therefrom. Upper fastening portions provided at front ends of seat rails constituting part of the rear sub-assembly are fastened to mounting holes formed in the brackets. Stays are provided on lower portions of the center frames, and lower fastening portions provided at front ends of right and left back stays are fastened to the stays. With this configuration, since the stays and the brackets are provided on the same members, that is, the center frames, even if the front sub-assembly is previously constructed by welding, it is possible to prevent deviation in dimensional accuracy of portions of the front sub-assembly to which the rear sub-assembly is to be fastened.

Method of forming a body frame structure for a four-wheeled buggy

Body frame structure for four-wheeled buggy

A crank shaft of a power unit is disposed in the longitudinal direction of a vehicular body. Accessories provided at either end portion of the crank shaft are covered with a front cover and rear covers which are removable from a casing. Front and rear drive shafts are disposed to be lower than the axial line of the crank shaft. A fan unit and an air cleaner are disposed to be higher than the axial line, so that front and rear operating spaces for inserting an impact wrench are formed in front of and in back of the front cover and the rear covers. The maintenance is performed through the operational spaces.

Structure and method for easy access to and maintenance of accessories

A saddle-riding type vehicle including a simple, lightweight and high rigidity frame structure. The frame structure includes bending upward center pipes 22, which are joined to lower pipes 21 extending backward from the lower portions of a pair of right and left front pipes 20, respectively; connecting the front pipes 20 to the center portions of the center pipes 22 with straight main pipes, respectively; putting front side pipes 25 between the front pipes 20 and the lower pipes 21 for constituting the three-sides of triangles together with the front pipes 20 and the lower pipes 21, respectively; extending seat rail pipes 26 backward from the center portions of the main pipes 24 by way of cross pipes 23 put between the upper portions of the center pipes 22, respectively; and laying reinforcing pipes 27 put between the front side pipes 25 and the main pipes 24 on the same straight lines as those of the seat rail pipes, respectively. A coupling between the exhaust pipe and the muffler is located behind the rear fenders. An air cleaner is positioned beneath the seat and a recessed portion behind the fuel tank receives the suction duct. The fuel tank or other vessel includes hooks on each side with elastic bands extending to right and left frame members supporting the vessel.

Saddle-riding type vehicle

A motorcycle covered by a cowl includes a power unit comprising an engine and a power transmission device enclosed by a cover within which an engine fan induces cooling air into heat transfer relation with said engine. A muffler device enclosed by the cowl has an air guide cover within which cooling air inducted into the power unit cover is passed thereinto in order to cool the muffler. According to an aspect of the invention the vehicle body frame has a hollow main frame operative to induce a flow of cooling air and for discharging it into cooling relation with the power transmission device.

Muffler device for motorcycle

Key operating means and locking means are separately provided. The key operating means is provided on the upper portion of a steering shaft, while the locking means is mounted on the lower portion of the steering shaft. Both means are connected to each other by way of a control wire. A cylinder of the key operating means is rotated by a key to engage or disengage a locking pin of the locking means with or out of an engaging member formed on a body frame, whereby locking or releasing is achieved.

Handle locking mechanism for vehicles

A vehicle frame construction in a buggy with a riding saddle, includes a main frame extending longitudinally along a central axis of the buggy, the main frame having front and rear ends, and a pair of down tubes disposed one on each side of the main frame and having one ends fixed to sides of the front end of the main frame and opposite ends fixed to sides of the rear end of the main frame. Each of the down tubes is composed of a downwardly directed portion extending downwardly from the front end of the main frame and in a forward direction of the buggy, a horizontal portion extending substantially horizontally from the downwardly directed portion in a rearward direction of the buggy, and an upwardly directed portion extending substantially vertically upwardly from the horizontal portion to the rear end of the main frame. Each of the down tubes includes a curved portion between the downwardly directed portion and the horizontal portion, the downwardly directed portion and the horizontal portion having axes extending at an acute angle with respect to each other. A reinforcement pipe is detachably coupled between the downwardly directed portion and the horizontal portion of each of the down tubes.

Vehicle frame construction for buggies with riding saddles

A front wheel suspension for a motor tricycle comprising a frame having a head pipe, a pair of front forks steerably supported on the head pipe, and a pair of bottom cases slidably fitted on lower portions of the front forks to support a front wheel. Within a closed space formed within the front forks and the bottom cases are arranged a damper to connect the forks and cases and a coil spring for biasing the forks and cases in extended direction to the damper and the coil spring thereby being protected from obstacles and considerably improving the riding comfort.

Growing community of inventors

Saitama, Japan

Tsuneo Kajikawa