JPH0478679A - Scooter type vehicle - Google Patents

Abstract

PURPOSE:To improve the stroke quantity of a reaction unit, the height of a seat and the volume of a storage box by arranging a part above a unit swing type engine so as to rationalize the position relation to the bottom face of storage box. CONSTITUTION:In a scooter type motorcycle, the surface of the cylinder 12 of a forcedly air-cooled engine 4 is covered with an air-guide cowling and the casing 26 of a fan rotatably supported on the end of a crankshaft is fitted to cover a crankcase 13 on the opposite side of a swing case. In this case, the fan casing 26 and a muffler 20 are disposed approximately in the same line on one side of a body. The shape and size of an air cleaner case 23 is then set in such a way that the image plane profile of the air cleaner case 23 can be accommodated within an approximately triangular space (indicated by hatching) enclosed by a line L1 described by the rear upper part side face profile of the fan casing 26, a line L2 described by the upper edge image plane profile of the muffler 20, and a common contact line L3 in contact with the respective apex parts of the lines L1, L2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a scooter type vehicle in which a storage box is installed under the seat and a unit swing type engine is placed below the storage box.

(Prior technology) - In order to install a step board section in front of the seat, the rear body on which the seat rests is set to have a relatively large volume and has a storage box inside, and a unit swing type engine is placed below it. This is a characteristic of scooter-type vehicles.

FIG. 4 shows a typical conventional scooter-type two-wheeled motor vehicle.

A front wheel a, which is steered by a handle C, and a rear wheel, which is driven by an engine d, are arranged in the front and rear. is placed on a rear body h which also serves as a storage hook g, and a unit swing type engine d is placed under the rear body h.

In a unit swing type engine, a crankcase J is connected to the rear of a cylinder l that tilts forward almost horizontally, and a swing case K is connected to the rear from one side of the crankcase j. The rear wheel located directly behind is supported by a shaft, and is also supported by a support arm l or pivot m at the lower front to be able to swing up and down on the frame n, and the upper rear is supported by a reaction unit 0. and buffer suspension.

In addition, the exhaust pipe p is guided downward from the cylinder i, and the muffler q turns to the opposite side of the swing case and extends rearward and upward.
connected to. The intake pipe r is introduced into the upper front part of the crankcase j. A carburetor S connected to an intake pipe r is located at the upper rear of a crankcase j, and an air cleaner t is further connected to the rear thereof.

In such a unit swing type engine, due to the position and gap relationship between the upper line and the storage box g,
Reaction Uni 1. The stroke amount for 0 was determined. Similarly, this positional relationship determined the seat height and the shape of the bottom of the storage hook. Particularly, parts located far from the pivot m, in this case the muffler q and the air cleaner case t, have a large swing stroke when damping, and the stroke amount is affected by the relative position of these parts with respect to the bottom of the storage box g. It is no exaggeration to say that it was.

For this reason, it is possible to increase the capacity by increasing the stroke amount of the reaction unit 0 with emphasis on ride comfort, by lowering the seat height to improve footing, and by improving the shape of the bottom of the storage box g. There were constraints on the demands of the government, and in many cases it was not possible to satisfy not only all of them, but also the demands of other parties.

(Invention or problem to be solved) This invention was made in consideration of the above circumstances, and it organizes the upper part of the unit swing type engine, rationalizes the positional relationship with the bottom of the storage box, and improves the rear The purpose of the present invention is to provide a scooter type vehicle that is useful for improving the stroke amount of a cushion unit, seat height, and storage box capacity.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the scooter type vehicle of the present invention has a step board section with a deep indentation between the handle and the seat, and a storage box in the seat below the seat. Under the rear body, there is a cylinder part that tilts forward almost horizontally, a swing case that extends rearward from the crankcase and integrally supports the rear wheel at the rear, and a carburetor that is placed above the rear of the crankcase. Furthermore, in a scooter-type vehicle in which a forced air-cooled unit swing type engine is unitized by an air cleaner etc. placed behind it and is buffer-suspended by a pivot so that it can swing up and down, the rear upper surface of the forced air cooling fan casing and This is located within a nearly triangular space surrounded by a V-shaped line drawn by each side profile of the muffler upper surface that is arranged rearward and upward, and a common tangential line connecting the tops of both lines. This configuration includes an air cleaner case having a side profile that fits within a triangle.

(Function) With this configuration, the side profile of the upper surface of the unit swing type engine has a simplified positional relationship with the storage box, and the locus and range of swinging around the pivot are also simplified. Therefore, it becomes easy to increase the stroke amount of the reaction unit, which helps improve riding comfort.

In addition, in connection with this, the seat height can be lowered to improve the footing, and the degree of freedom in the shape of the bottom surface of the storage box is increased, making it possible to easily expand the capacity.

(Example) The following describes an example of the present invention with reference to the drawings. 1st
The figure is a right side view, FIG. 2 is a plan view, and FIG. 3 is a left side view.

It is supported by a front wheel 1 that is steered by a handlebar 3 and a rear wheel 2 that is driven by a unit swing type engine 4, and a step boat 6 is placed in a low indentation between the handlebar 3 and the seat 5, so that the seat 5 The rear body 7 on which the vehicle is mounted has a relatively large volume, and the unit swing type engine 4, which is integrated with the rear wheel 2, is placed below it.

Inside the rear body 7, a storage box 8 is installed at the front, and a fuel tank 9 and an oil tank 10 are placed at the rear. The storage box 8 has a volume that can accommodate a full-face helmet 11.

The unit swing type engine 4 has a crankcase 13 connected to the rear of a cylinder 12 that tilts forward almost horizontally.
A swing case 14 is connected to the rear from one side of the crank case 13, and the crank case 13 is attached to the rear of the swing case 14.
A rear wheel 2 located immediately behind the is pivotally supported. The lower front support arm 15 is connected to the frame 1 by the pivot 16.
7 so as to be able to swing vertically, and the rear upper part is supported by a reaction tension unit 18 for buffer suspension.

The exhaust passage 19 is led out from the lower surface of the cylinder 12, passes through the opposite side of the swing case 14, and is continuous with a muffler 20 that is arranged on the side of the rear wheel 2 and extends rearward and upward. On the other hand, the intake passage 21 is introduced into the front upper part of the crankcase 13 from the carburetor 22 located at the rear upper part of the crankcase 13.
3 are connected. The carburetor 22 is located on the side of the throttle lever box 28 containing the throttle cable, from which the throttle cable is guided forward.

In addition, an ignition coil 24 for ignition is attached to the front part of one side of the crankcase 13, and an oil pump 25 for lubricating various parts of the engine is arranged adjacent to the front of the introduction part of the intake passage 21 in the upper front part. Ru.

Further, this engine is of a forced air cooling type, and the surface of the cylinder 12 is covered with a cowling for guiding air, and a casing 26 of a blower fan supported pivotally at the end of the crankshaft is mounted on the crankcase 13 on the opposite side of the swing case 14. It is covered.

Therefore, the fan casing 26 and the muffler 20
As shown in the figure, they are arranged approximately in the same row on one side of the vehicle body.

The air cleaner case 23 is also placed in substantially the same position as these, and the rear end of the intake passage 21 is curved sideways and connected to the air cleaner case 23.

The line L1 is defined by the side profile of the rear upper part of the fan casing 26, the line L2 is defined by the side profile of the upper edge of the muffler 20, and the line L3 is a common tangential line that touches the top of each of them. The shape and size of the air cleaner case 23 are set so that the side profile of the air cleaner case 23 fits within a rectangular space (shown by hatching in FIG. 3).

In this way, when the unit swing type engine 4 buffers around the pivot 16, the side profile of its upper surface swings along with the line L3, and the positional relationship with the bottom surface 8a of the storage box 8 and the swing trajectory are simplified. In the case of the maximum swing stroke, the state is shown by a dotted line 13.

This increases the stroke amount of the reaction unit to improve riding comfort, lowers the seat height to improve footing, and allows the bottom shape of the storage box to be set without restrictions to increase capacity. , becomes possible without difficulty.

The pivot, which is the center of swing of the unit swing type engine 4, is located at the upper front of the crankcase 13 (
16a) in FIG. 3 may also be used.

〔Effect of the invention〕

As described above, in the scooter type vehicle according to the present invention, the space between the handlebar and the seat is deeply indented to form a step board, a storage box is installed in the rear body below the seat, and the storage box is installed under the rear body in an almost horizontal direction. Unitized with an inclined cylinder part, a swing case that extends rearward from the crankcase and integrally supports the rear wheel at the rear, a carburetor placed above the rear of the crankcase, and an air cleaner placed behind it. In a scooter-type vehicle in which a forced-air-cooled unit swing-type engine is shock-suspended by a pivot so that it can swing up and down, the upper rear surface of the forced air cooling fan casing and the upper surface of the muffler that is arranged rearward and upward. In an almost triangular space surrounded by a V-shaped line defined by each side profile and a common tangential line connecting the tops of both sides, there is an air cleaner case having a side profile that fits within this triangle. This arrangement has the effect of easily increasing the stroke amount of the reaction unit, lowering the seat height, and expanding the storage box capacity.

FIG. 4 is a right side view of a conventional scooter type two-wheeled motor vehicle.

1...Front wheel, 2...Rear wheel, 4...Unit swing type engine, 5...Seat, 7...Rear body,
8...Storage box, 11...Helmet, 12.
...Cylinder, 13...Crankcase, 14...
Swing case, 16.16a...pivot, ]8.
...Reaction unit, 19...Exhaust passage, 2
0...Muffler, 23...Air cleaner case, 26
...Blower fan casing.

Roganto agent Hisashi Nami Tano

[Brief explanation of the drawing]

Claims (1)

[Claims] The space between the steering wheel and the seat is deeply curved to form a step board, and a storage box is installed in the rear body below the seat.Underneath the rear body, there is a cylinder part tilted forward almost horizontally, and a cylinder part extending rearward from the crankcase. The forced air-cooled unit swing type engine is made up of a swing case with the rear wheel integrally supported at the rear, a carburetor placed above the rear of the crankcase, and an air cleaner placed behind it. In a scooter type vehicle that is buffer-suspended so as to be able to swing up and down, a V-shaped line defined by the respective side profiles of a rear upper surface part of a blower fan casing for forced air cooling and a muffler upper surface part that is arranged rearward and upwardly inclined; Approximately 3 points surrounded by a common tangential line connecting the tops of both
A scooter-type vehicle characterized in that an air cleaner case having a side profile that fits within a triangle is disposed within a square space.