JPS6171285A - Motorcycle with side wheel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a two-wheeled vehicle with side wheels that is particularly suitable for driving on rough terrain.

(Prior art) As vehicles for traveling on rough terrain, there have conventionally been three-wheeled vehicles with one front wheel and two rear wheels (Japanese Patent Publication No. 49-16581), and four-wheeled vehicles with two front wheels and two rear wheels (Japanese Patent Publication No. 58/1983). -13657
No. 6) etc. have been proposed.

By the way, although three-wheeled vehicles have a simpler structure than four-wheeled vehicles, they have poorer running stability and are more likely to overturn, especially when making sharp turns.

Furthermore, while four-wheeled vehicles have excellent running stability, they have a complex structure, such as requiring braking devices on all four wheels for balance reasons.

(Problems to be Solved by the Invention) This invention was made in view of the above-mentioned points, and since it uses a conventional general two-wheeled vehicle, the structure is extremely simple, and it has excellent running stability, and it is similar to the conventional three-wheeled vehicle. Alternatively, the present invention aims to provide a two-wheeled vehicle with side wheels that provides a handling feeling not found in four-wheeled vehicles.

(Means to Solve the Problem) The gist of the present invention is that a pair of swing arms are normally attached to both sides of the lower part of the vehicle body between the front and rear wheels of an off-road two-wheeled vehicle and extend left and right to rotate in the vertical direction. In addition to freely supporting the arm, the arm is held substantially horizontally via a suspension spring member, and a wheel is rotatably attached to the end of each arm to form a four-wheeled vehicle.

Furthermore, the pivot arm of the swing arm relative to the vehicle body is arranged so as to be slightly inclined to one side with respect to the horizontal line, and the wheels on both sides tilt the vehicle body in a specific direction when turning, thereby steering the vehicle. .

(Function) When driving on rough terrain, the front and rear wheels of a two-wheeled vehicle, as well as the wheels protruding laterally from both sides of the vehicle body, move up and down in response to uneven road surfaces, causing the vehicle body to shift as the driver's weight shifts. After allowing sufficient left and right tilting, the wheels on both sides reliably prevent the vehicle from rolling over, thereby improving running stability.

In addition, by arranging the base end shaft branch line of the swing arm that supports the wheels on both sides to be slightly inclined to one side with respect to the horizontal line, the left and right wheels automatically move in the turning direction of the vehicle body as the swing arm moves up and down. Change direction and make the vehicle turn smoothly.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 is a left side view of the embodiment, FIG. 2 is a view taken along the line nn in FIG. 1, and FIG.
The figure is a schematic plan view.

In these figures, 1 is an off-road type two-wheel vehicle with low-pressure balloon tires mounted on the front and rear wheels 3.4, and a pair of approximately Y-shaped swing arms 5 are bifurcated on both sides of the lower part of the vehicle body 2 in front of the rear wheels 4. The ends are respectively supported by support shafts 6 so as to be rotatable up and down. Reference numeral 7 denotes a spring suspension member for holding the swing arm 5 substantially horizontally, which includes a bracket 8 fixed near the tip of the swing arm 5 and a vehicle body 2 above the support shaft 6.
It is interposed between brackets 9 fixed to. A wheel 10 is rotatably disposed at the tip of the swing arm 5 and is equipped with a balloon tire. 11 is the fender of the wheel 10
It is.

Also, 12 is the engine, 13 is the fuel tank, 14 is the seat, 15 is the handle, 16 is the left and right footrest, 17
18 indicates a brake pedal, and 18 indicates a gear change pedal.

Next, FIGS. 5 and 6 show another embodiment, in which the base end shaft branch line PL of each of the swing arms 5 is tilted slightly forward (α) with respect to the horizontal line H with respect to the vehicle body 2. The swing arm 5 is pivotally supported by a support shaft 6 at a slight angle forward.

Therefore, the wheels 10 on both sides change direction in the opposite direction to the direction in which the vehicle body 2 is tilted due to the shift of the driver's weight (FIG. 7 shows a state in which the vehicle body 2 is turning to the left, but the vehicle body 2 is rotated as shown in FIG. 8). ), the side wheels 10 are tilted to the right in the turning direction (
β, β′).

In the case of the above-mentioned embodiment, since the wheels 10 on both sides are not configured with such a steering mechanism, when turning, the balloon tires of the inner side wheels 10 are thick (concave, thereby enabling smooth turns). In addition, in the case of the second embodiment, the reason why the swing arm 5 is pivotally supported with respect to the vehicle body 2 with a slight inclination forward is because an experienced driver normally does not know the turning direction when turning. is based on tilting your weight in the opposite direction to perform a turning operation.Therefore, when a typical driver performs a turning operation by leaning their weight in the direction of the turn, each swing arm must be aligned with respect to the horizontal line. The proximal shaft branch line of No. 5 is arranged so as to be slightly inclined backward.

(Effects) As explained above, according to the two-wheeled vehicle with side wheels of the present invention, a two-wheeled vehicle is basically used, and a pair of swing arms are extended to the left and right on both sides of the lower part of the vehicle body, so that the two-wheeled vehicle has side wheels. The structure is simple because it is rotatably supported, the arm is held substantially horizontally via a suspension spring member, and wheels are rotatably attached to each arm end to form a four-wheeled vehicle. Moreover, it has excellent running stability, is extremely effective as a vehicle for traveling on rough terrain, and offers a unique handling feeling not found in conventional three-wheeled or four-wheeled vehicles.

Furthermore, if the pivot line of the swing arm is arranged so as to be slightly inclined to one side with respect to the horizontal line, simply tilting the vehicle body in a specific direction when turning will cause both wheels to face the turning direction and be steered. Even without installing tires, the effect is smoother turning.

[Brief explanation of the drawing]

FIG. 1 is a left side view showing an embodiment of the present invention, FIG. 2 is a view taken along line nn in FIG. 1, and FIG. 3 is a view taken from III-II in FIG.
I-line arrow view, FIG. 4 is a schematic plan view of the same, FIG. 5 is a left side view of the side wheel shaft support showing another embodiment, and FIG. 6 is the VT of FIG. 5.
-Vl line arrow view, Figure 7 is the same schematic plan view, Figure 8 is the 7th
It is a view taken along the line ■-■ in the figure. 1...Two-wheeled vehicle, 2...Vehicle body, 3...Front wheel, 4
... Rear wheel, 5... Swing arm, 6... Support shaft,
7... Hane: U frame member, 10... Side transport. Figure 5 Atsushi 7IFI Figure 6

Claims (2)

[Claims] (1) On both sides of the lower part of the vehicle body between the front and rear wheels of a two-wheeled vehicle, a pair of swing arms are extended left and right and pivoted so as to be rotatable in the vertical direction, and the arms are held approximately horizontally via a suspension spring member. , a two-wheeled vehicle with side wheels, characterized in that a wheel is rotatably attached to the end of each arm. (2) The two-wheeled vehicle with side wheels according to claim 1, wherein the swing arm is arranged so that the axis branch line relative to the vehicle body is slightly inclined to one side with respect to the horizontal line.