JPH0459493A - Motor scooter type vehicle - Google Patents

Abstract

PURPOSE:To enhance the operating easiness in mounting and removal of an engine by arranging the upper part of the profile of a carburettor so as not to protrude up a reference line, increasing the stroke of a rear cushion unit, sinking the seat level, and enlarging the capacity of an accommodation box. CONSTITUTION:The straight line as common tangential to the profile of the ignition coil 24 upper part and the profile of the air cleaner 23 oversurface is assumed as a reference line X-X, and a carburettor 22 is installed so that the top of the profile of the carburettor 22 upper part is located identical or below this reference line X-X. With this carburettor 22, a throttle lever is situated on the side face, and a throttle lever box 28 is mounted, and from its front face a throttle cable is led out ahead, wherein no projection should exist on the oversurface. A float chamber 27 intrudes in a recess between a crank case 13 and rear wheel 2 so as to acomplish a less tall structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) 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 under 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. 7 shows a scooter type two-wheeled motor vehicle.

The front wheel a, which is steered by the handle C, and the rear wheel, which is driven by the engine d, are arranged in the front and rear. It is placed on a rear body h that also serves as a box g, and a unit swing type engine d is arranged below the rear body h.

In a unit swing type engine, a crankcase j is connected to the rear of a cylinder 1 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 immediately behind is pivotally supported, and the front lower support arm l is pivotally supported by a pivot m to the frame n so as to be able to swing vertically, and is also supported by the rear upper cushion unit 0. Buffer suspended.

Further, the exhaust pipe p is guided downward from the cylinder i, and the intake pipe q is introduced into the front upper part of the crankcase j. A carburetor r connected to an intake pipe q is located at the upper rear of a crankcase j, and an air cleaner S is further connected to the rear thereof.

In such a unit swing type engine, the position and clearance relationship between the upper part of the engine, that is, the cylinder i, the carburetor r1, the oil pump, the ignition coil, etc. arranged at the front upper part of the crankcase, and the storage box g,
Furthermore, if a fuel tank or oil tank is placed behind the storage box, the stroke amount of reaction unit 0 is determined by the positional relationship between these tanks, the air cleaner, and the rear wheels. Similarly, this positional relationship determines the seat height and the shape of the bottom of the storage box.

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 made, and in many cases it was not possible to satisfy not only all of them, but also the demands of other parties.

In addition, the cylinder i, carburetor r, air cleaner S, ignition coil, oil pump, and the casing of the cooling fan in the case of a forced air-cooled engine have uneven shapes due to their functions, so the above restrictions apply. At the same time, there was a lot of interference when attaching and detaching the unit swing type engine to the vehicle body, which was the main reason why the workability of attaching and detaching could not be improved.

(Problems to be Solved by the Invention) This invention addresses the above-mentioned circumstances by organizing the upper part of the unit swing type engine, rationalizing the positional relationship with the bottom of the storage box, and improving the stroke amount of the reaction unit and the seat. The present invention aims to provide a scooter type vehicle which is useful for improving storage box capacity and improves the workability of attaching and detaching a unit swing type engine.

[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 rear body 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 unit swing type engine, which is made into a unit by an F-cleaner placed behind it, is damped and suspended by a pivot so that it can swing up and down, the side surface of the upper surface of the ignition coil is placed at the front upper part of the crankcase. A common tangential straight line that touches the profile and the side profile of the top surface of the air cleaner is used as a reference line,
The configuration is such that the upper part of the side profile of the carburetor does not protrude above this reference line.

Further, in the second invention, the space between the handle and the seat is deeply indented to form a step board part, a storage box is installed in the rear body below the seat, and a cylinder part tilted forward almost horizontally is installed under the rear body. , a unit swing type consisting of 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 the engine is shock-suspended so as to be able to swing up and down using a pivot, a common tangential straight line that touches the side profile of the upper surface of the ignition coil located at the front upper part of the crankcase and the side profile of the upper part of the rear wheel. is a reference line, and the configuration is such that the upper portions of the side profiles of the carburetor and air cleaner do not protrude above this reference line.

(Function) With this structure, both the first invention and the second invention,
Even if the side profile of the top of the unit swing type engine has irregularities in various places, the top does not protrude beyond the reference line, simplifying the positional relationship with the storage box and allowing the swing trajectory around the pivot. , the range is also simplified. Therefore, it is easy to increase the stroke amount of the reaction unit, which helps improve riding comfort.In conjunction with this, the seat height can be lowered to improve footing, and the storage box The degree of freedom in the shape of the bottom surface is expanded, making it possible to easily expand the capacity.

In addition, the presence of a reference line makes it easier to avoid interference with the vehicle body and improves the workability of attaching and detaching the unit swing type engine.

(Example) DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings showing embodiments of the present invention will be explained below.

First, in the first invention, FIG. 1 is a right side view, FIG. 2 is a plan view, and FIG. 3 is a left side view of a scooter type two-wheeled motor vehicle according to an embodiment thereof.

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. The rear body 7 on which the vehicle 5 is mounted is set to have a relatively large volume, and the unit swing type engine 4 integrated with the rear wheel 2 is disposed 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.

In the unit swing type engine 4, a crankcase 13 is connected to the rear of a cylinder 12 that tilts forward almost horizontally, and a swing case 14 is connected to the rear from one side of the crankcase 13. 1
The rear wheel 2, which is located immediately behind the wheel 3, is also pivoted. and,
The lower front support arm 15 is pivotally supported by a frame 17 via a pivot 16 so as to be able to swing vertically, and the upper rear part is supported by a reaction unit 18 for buffer suspension.

The exhaust passage 19 is led out from the lower surface of the cylinder 12 and continues to a muffler 20 arranged on the side of the rear wheel 2 on the opposite side of the swing case 14. 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, and is further introduced into the front upper part of the crankcase 13.
An air cleaner 23 is connected to the rear of the air cleaner 23 .

In addition, an ignition coil 24 for ignition is attached to the front part of one side of the crankcase 13, and as shown in FIG. A pump 25 is arranged. Furthermore, 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 on one side of the crankcase 13 is attached a casing 26 of a blower fan that is pivotally supported at the end of the crankshaft. There is.

Due to the nature of the parts, the tops of the irregularities drawn in the side profile of the upper surface of the unit swing type engine 4 configured in this manner are not only for parts that do not have a degree of freedom, such as the cylinder 12 and fan casing 26, but also for the carburetor 22 and air cleaner. 23. Ignition coil 24. They are broadly classified into those with a relatively high degree of freedom, such as the oil pump 25.

Then, a common tangential straight line touching the side profile of the upper part of the ignition coil 24 and the side profile of the upper surface of the air cleaner 23 is assumed to be a reference line XX, and the upper end of the side profile of the upper part of the carburetor 22 The carburetor 22 is installed so as to be located at or below the reference line XX.

That is, as shown in FIG. 4, in the carburetor 22, the throttle lever 29 is located on the side surface, the throttle lever box 28 is attached, the throttle cable 30 is guided forward from the front surface of the carburetor 22, and a protrusion is provided on the top surface. Or something that doesn't exist or is used. The float chamber 27 is set low so as to enter the recess between the crankcase 13 and the rear wheel 2.

In this way, when the unit swing type engine 4 buffers around the pivot 16, the side profile of its upper surface swings along the reference line X-X, and the storage box 8
The positional relationship between the bottom surface 8a, the fuel tank 9° and the oil tank 10, and the swing locus are simplified, and in the case of the maximum swing stroke, the shape is as shown in xl-Xl.

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 any restrictions, increasing capacity. , becomes possible without difficulty.

Next, FIG. 6 is a side view of a scooter type two-wheeled motor vehicle showing an embodiment of the second invention.

A side profile of the upper part of the ignition coil 24,
A common tangential straight line touching two points on the side profile of the upper part of the rear wheel 2 is assumed as a reference line Y-Y, and the upper ends of the side profile of the upper part of the carburetor 22 and the air cleaner 23 coincide with this reference line Y-Y. carburetor 22 and air cleaner 23 so that they are located at or below
or will be installed.

When the unit swing type engine 4 buffers around the pivot 16, the side profile of its upper surface swings along with the reference line Y-Y, and the bottom surface 8a of the storage box 8 and the fuel tank 9. The positional relationship with the oil tank 10 and the swing locus are simplified, and in the case of the maximum swing stroke, Y
, -Y.

This increases the stroke amount of the reaction unit, improves ride comfort, lowers the seat height and improves footing, and also allows the bottom shape of the storage box to be set without restrictions, increasing capacity. This becomes possible without any difficulty.

In addition, since there is no protrusion beyond the reference line XX in the first invention and the reference line Y-Y in the second invention, interference with the vehicle body can be easily avoided, and the unit swing type engine can be mounted and removed from the vehicle body. Work efficiency is greatly improved.

Furthermore, the pivot may be set above the front of the crankcase 13 (for example, as shown in FIG. 3, 16a), and the same applies to natural air-cooled and water-cooled engines as well as forced air-cooled engines.

〔Effect of the invention〕

As mentioned above, the scooter type vehicle according to the present invention has the first
In the invention, a common tangential straight line that touches the side profile of the upper surface of the ignition coil disposed at the front upper part of the crankcase and the side profile of the upper surface of the air cleaner is taken as a reference line, and the upper side profile of the carburetor is aligned with this reference line. In the second invention, the coil is set so as not to protrude further upward, and in the second invention, it is set so as to be in contact with the side profile of the upper surface of the ignition coil disposed at the front upper part of the crankcase and the side profile of the upper part of the rear wheel, and so as not to protrude. Therefore, the stroke amount of the reaction unit can be easily increased, the seat height can be lowered, and the storage box capacity can be expanded, and the workability of attaching and detaching the unit swing type engine can be improved.

[Brief explanation of the drawing]

Fig. 1 is a right side view of a scooter type two-wheeled motor vehicle showing an embodiment of the first invention, Fig. 2 is a plan view of the two-wheeled motor vehicle shown in Fig. 1, and Fig. 3 is a right side view of the two-wheeled motor vehicle shown in Fig. 1. 4 is an enlarged side view of the carburetor, FIG. 5 is an enlarged plan view of the oil pump, and FIG. 6 is a right side view of a scooter type two-wheeled motor vehicle showing an embodiment of the second invention. , FIG. 7 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... Pivot, 18... Reaction uni storage box, 11... Helmet,
12...Cylinder, 13...Crankcase, 14
...Swing case, 16...Pivot, 18...
・Reaction unit, 21...Intake passage, 22
...Carburetor, 23...Air cleaner, 24...
・Ignition coil, 25...Oil pump, 2
6...Blower fan casing.

Claims (1)

[Claims] 1. The space between the handle and the seat is deeply curved to form a step board, a storage box is installed in the rear body below the seat, and under the rear body there is a cylinder part tilted forward almost horizontally. , a unit swing type consisting of 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 the engine is shock-suspended so as to be able to swing up and down by a pivot, a common tangential straight line that touches the side profile of the top surface of the ignition coil located at the front upper part of the crankcase and the side profile of the top surface of the air cleaner. As a reference line,
A scooter type vehicle characterized in that the upper part of the side profile of the carburetor is set so as not to protrude above the reference line. 2. The space between the handle and the seat is deeply indented 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 that is tilted forward almost horizontally, and a cylinder part that extends backward from the crankcase. The unit swing type engine consists of a swing case that 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 that is swingably suspended, the reference line is a common tangential straight line that touches the side profile of the upper surface of the ignition coil located at the front upper part of the crankcase and the side profile of the upper part of the rear wheel. The upper side profile of the carburetor and air cleaner
A scooter-type vehicle characterized by being set so as not to protrude above this reference line.