JP3255165B2 - Scooter type motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scooter type motorcycle in which a storage box is provided below a seat and a unit swing type engine is disposed below the storage box.

[0002]

2. Description of the Related Art A general layout of a conventional scooter-type motorcycle is such that a rear body on which a seat is mounted is set to a relatively large volume in order to lay a step board portion in front of the seat, so that the inside of the seat is located under the seat. A storage box is installed, and a unit swing type engine is placed below it.

FIG. 6 shows an example of a conventional scooter type motorcycle.

In a scooter type motorcycle, a front wheel a steered by a steering wheel c and a rear wheel b driven by an engine d are arranged in front and rear, and a gap between the steering wheel c and the seat e is lowered so that a step board is formed. f, the seat e is placed on a rear body h in which a storage box g is provided, and a unit swing type engine d is arranged below the rear body h. The storage box g has a sufficient volume for storing the full-face helmet i.

In the unit swing type engine d, a crankcase k is connected to the rear of a cylinder j which is inclined substantially horizontally forward, and a swing case 1 is provided to the rear from one side of the crankcase k. Crankcase k
And a front end of a support arm m extending forward and downward of the unit swing type engine d is pivotally supported by a pivot n on a frame o under the vehicle body so as to be vertically swingable. The rear upper part is supported by the rear cushion unit p, and is suspended.

The exhaust pipe q extends downward from the cylinder j, and is connected to a muffler r that extends to the rear and upward around the opposite side of the swing case l. The intake pipe s is introduced into the upper front part of the crankcase k. The carburetor t connected to the intake pipe s is located above and behind the crankcase k, and the air cleaner case u is further connected to the rear.

In such a unit swing type engine, the stroke amount of the rear cushion unit p is determined by the position and the gap relationship between the upper line and the storage box g. Similarly, the seat height and the shape of the bottom surface of the storage box g are determined by this positional relationship.

In particular, since the storage box g is set large so as to be able to store a full-face helmet i, restrictions are also increased, and the stroke amount of the rear cushion unit p is increased in consideration of riding comfort. Further, in many cases, the height of the sheet e cannot be reduced to improve the footing property.

In order to alleviate such a constraint,
In the storage box g shown in the figure, the helmet i is stored with the opening bottom face down, and a recess w that is recessed in the opening is formed on the bottom surface v of the storage box g. When the top of the carburetor t enters the recess w, the stroke of the rear cushion unit p can be increased.

However, even in this case, the carburetor t
When the throttle cable x is pulled out upward, the throttle cable x is pulled out upward and is forcibly bent and turned upside down immediately, so that the operation becomes heavy and the operability is reduced. Not reached.

FIG. 7 shows the carburetor installed on the side.
Throttle lever in the throttle lever box y
With the throttle cable x₁Key to pull
Gabreta t₁Carburetor t₁The height of
Hold down, air cleaner case u ₁Along with the upper edge
Storage boxes with side profiles almost aligned
g₁Bottom v₁To face. This allows a gap between the two
And the buffer stroke can be set large.
You. Helmet i with storage box g with opening bottom down
₁Is stored inside.

[0012], shown in Figure 8, the upper end of the support arm m ₁ extending rearward and upward is pivotally supported swing vertically to the frame o ₁ by a pivot n _1, the bottom surface v ₂ of the storage box g ₂ The amount of displacement of the unit swing type engine d is reduced, and the amount of stroke of the cushion unit p is increased.

[0013] carburetor t _2, the air cleaner u ₂ is arranged the pivot n ₁ on the side of the front of the cylinder j, the operation away from the housing box bottom v ₂ If the unit swing type engine d rises to buffer swings I do. That is, the cushion unit p
There upon the total elongation may be set as the upper end of the carburetor t ₂ is closest to the housing box bottom v _2, increasing the buffering stroke, seat height reductions are easy.

Furthermore, to that shown in Figure 9, which was equipped with a storage box g ₃ for accommodating a helmet i ₁ which was upside down, bottom v ₃ is formed in a curved surface to fit the helmet top surface, As opposed to the curved portion upwardly carburetor t ₃ is arranged, which enables an increase in stroke volume by increasing the gap between them.

The unit swing type engine d is
Pivot n above rank case k ₁By frame o
₁Supported by the carburetor t₃Displacement amount is small,
The minute buffer stroke has been increased. In addition, the cushion
Unit p₁Is in the lower front part of the rear body h in front of the cylinder
And is connected to the support arm m by a link mechanism.
And the frame o₁And cushion unit p₁Dried
The restrictions imposed by negotiations are completely eliminated.

However, in such a conventional helmet storage device, emphasis has been placed on increasing the gap between the unit swing type engine and the storage box.
For the storage box that is determined to be almost constant by the upper and lower width of the helmet, it tends to be cramped structure,
For example, to increase the buffer stroke to improve ride comfort,
There has been a problem that it is difficult to provide a fundamental solution to the demand for lowering the seat height and improving the footing performance.

[0017]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to reduce the vertical width of the storage box and relatively increase the stroke of the rear cushion unit. It is an object of the present invention to provide a scooter-type motorcycle in which a seat height is reduced to improve the leg contact.

[0018]

According to a first aspect of the present invention, there is provided a scooter type motorcycle according to the present invention.
A crankcase connected to the rear of the cylinder, a swing case connected to the crankcase and extending rearward, a rear wheel pivotally supported by the rear of the swing case, and an upper front portion of the rear wheel. A carburetor and an air cleaner case connected to the carburetor are unitized to form a unit swing type engine. The unit swing type engine is pivotally supported by a pivot at a lower part of a rear body having a storage box and a rear cushion unit. In the scooter type motorcycle which is suspended so as to be able to swing up and down, the storage box includes:
In plan view, the front side of the vehicle has a smaller opening width than the rear side of the vehicle, and the box opening dimension in the vehicle front-rear direction is larger than the box depth dimension, and the storage box is located near the center in the vehicle width direction. A convex portion protruding inward is disposed at the bottom of the box, and a throttle lever of the carburetor is disposed substantially below the center of the helmet stored in the storage box and held by the convex portion. The upper part of the unit swing type engine is located near the center in the vehicle width direction and in front of the rear wheel, and the throttle lever is operated from the side by a throttle cable, while the unit swing type engine swings upward around the pivot. When the top of the carburetor approaching the bottom of the storage box is above the throttle cable A.

According to another aspect of the present invention, there is provided a scooter-type motorcycle according to the present invention, which is connected to a substantially horizontally inclined cylinder and a rear portion of the cylinder. A crankcase, a swing case connected to the crankcase and extending rearward, a rear wheel pivotally supported by a rear portion of the swing case, a carburetor disposed in front of an upper portion of the rear wheel, and a carburetor. The connected air cleaner case is unitized to form a unit swing type engine. The above unit swing type engine is pivotally supported by the pivot at the lower part of the rear body equipped with a storage box and can swing up and down by a rear cushion unit. A scooter-type motorcycle with a buffer suspension and a step board on the front side of the rear body In the storage box, the opening width of the front side of the vehicle is narrower than the rear side of the vehicle in a plan view, and the box opening dimension in the vehicle front-rear direction is larger than the box depth dimension. The box has a height at the bottom of the box below the apex of the rear wheel or the air cleaner case and above the step board, and the carburetor is located above the unit swing type engine and near the center in the vehicle width direction, and The throttle cable is pulled out from the side of the carburetor while the throttle lever is located on the side of the carburetor, and the starting point of the throttle cable on the drawing side is located substantially below the center of the storage box in plan view. Position, and the unit swing type engine swings upward around the pivot. Can, in which the top of the carburetor approaching the bottom of the storage box has an upper than the throttle cable.

Further, in order to solve the above-mentioned problems,
In the scooter-type motorcycle according to the present invention, as described in claim 3, the storage box has a substantially horizontal bottom in a side view.

[0021]

With this scooter type motorcycle, the throttle cable provided with the throttle lever on the side of the carburetor is pulled out from the side of the carburetor, the throttle cable position closest to the normal storage box is lowered downward, and the storage box is removed. The box depth of the storage box is made relatively small by making the box depth dimension smaller than the box opening dimension in the vehicle longitudinal direction. As a result, the bottom of the box can be separated from the unit swing type engine by an amount corresponding to the shallower box depth, increasing the buffer stroke of the rear cushion unit to improve ride comfort and lowering the seat height. It is possible to improve footing and steering stability.

In this scooter type motorcycle, attention is paid to the relationship between the throttle lever and the helmet stored in the storage box. A throttle lever is provided on the side of the carburetor, and the throttle cable is connected from the side of the carburetor. On the other hand, the storage box is configured so that the front and back direction of the box is longer than the box depth, ensuring storage with the helmet, ensuring a large cushion stroke of the rear cushion unit, and improving the rider's feet is there.

[0023]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view showing an embodiment of a scooter type motorcycle according to the present invention, and FIG. 2 is a plan view.

The scooter type motorcycle is supported by a front wheel 1 steered by a steering wheel 3 and a rear wheel 2 driven by a unit swing type engine 4, so that the gap between the steering wheel 3 and the seat 5 is lowered and stepped. The board 6 is laid. In the scooter type motorcycle, the rear body 7 on which the seat 5 is mounted is set to a relatively large volume, and the rear wheel 2
And a unit swing type engine 4 integrated with the engine.

In the rear body 7, a storage box 8 is provided at a front portion, and a fuel tank 9 is provided at a rear portion. The storage box 8 has a shape and a volume for storing the full face helmet 10 that is placed horizontally (turned down). Reference numeral 11 denotes a convex portion formed on the bottom surface 8a, which is provided for stably holding the helmet 10.

In the unit swing type engine 4, a crankcase 13 is connected to the rear of a cylinder 12 that tilts substantially horizontally forward, and a swing case 14 is provided from one side of the crankcase 13 to the rear. The rear wheel 2 located immediately behind the crankcase 13 is pivotally supported. A support arm 15 formed at the front lower portion of the swing case 14 is pivotally supported by a frame 17 on a frame 17 so as to be able to swing up and down, and then the upper portion is supported by a rear cushion unit 18 and suspended by a cushion.

As shown in FIG. 1, the unit swing type engine 4 includes a cylinder 12 which is inclined substantially horizontally forward, a crankcase 13 connected to the rear of the cylinder 12,
A carburetor 22 provided in the intake passage 21; an air cleaner case 23 connected to the carburetor 22; a swing case 14 connected to the crankcase 13 and extending rearward; The wheel 2 and the wheel 2 are unitized and integrally formed.

An exhaust pipe 19 constituting an exhaust passage is led out from the lower surface of the cylinder 12, passes through the opposite side of the swing case 14, and continues to a muffler 20 which is disposed on the side of the rear wheel 2 and extends rearward and upward. On the other hand, the intake passage 21 is introduced from a carburetor 22 located above and behind the crankcase 13 to an upper front portion of the crankcase 13, and
An air cleaner case 23 is connected to the rear of the air cleaner case 2.
In the carburetor 22, a throttle lever box 24 surrounding the throttle lever is located on a side surface, and a throttle cable 25 is led forward from the throttle lever box 24. The throttle cable 25 is drawn forward from the side of the carburetor 22.

As shown in FIGS. 2 and 3, the throttle lever accommodated in the throttle lever box 24 provided on the side of the carburetor 22 includes an accommodation box 8 and a helmet accommodated in the box 8 in plan view. 10 is located at approximately the center. As shown in FIG. 3, the storage box 8 has a narrower opening width in plan view on the front side of the vehicle than on the rear side of the vehicle, and the throttle lever box 24 storing the throttle lever is located below the storage box 8. It is arranged.

In addition, an ignition ignition coil 26 is mounted on the front side of one side of the crankcase 13, and an oil pump for lubricating various parts of the engine is provided on the front upper portion adjacent to the front of the introduction portion of the intake passage 21. 27 are arranged.

In this manner, since the storage box 8 is formed so as to store the helmet 10 in a state where the helmet 10 is placed sideways (side down) with the front surface of the helmet facing the front of the vehicle, the bottom surface 8a can be set relatively shallow. . That is, when the vertical width H and the horizontal width W of the full-face helmet 10 are compared, H> W is general, so that the helmet 10 is placed sideways (horizontally) instead of the one stored vertically, so that the dimensional difference of HW is obtained. Only the vertical width of the storage box 8 is reduced, and the box depth can be reduced. The helmet 10 is generally formed such that the left-right width W is smaller than the up-down width H and the front-rear width.

As the storage box bottom surface 8a becomes shallower, the space between the storage box and the unit swing type engine 4 can be made longer, and the cushioning stroke of the cushion unit 18 can be increased to improve the riding comfort.

At the same time, the height of the storage box 8 and the seat 5 can be reduced, and the rider's feet can be improved.

Next, as described above, the shape of the storage box 8 is adapted to store the helmet 10 in the horizontal state, but as shown in FIG. Oval shape, helmet opening bottom surface 10
An arc-shaped gap 28 (hatched portion) is formed between the storage box b and the storage box side surface 8b.

This gap 28 is convenient for inserting a hand and grasping the edge of the opening bottom surface 10b of the helmet 10, and the helmet 10 can be easily taken in and out of the storage box 8. When the helmet 10 is stored with the opening bottom surface 10b of the helmet 10 inclined backward and outward toward the rear, the flat cross-sectional shape of the rear portion of the storage box 8 can be formed symmetrically, and the sealing performance can be easily secured by the seat bottom surface. become.

The helmet 10 is stored in a horizontal position, and the opening bottom surface 10b of the helmet 10, which is in a substantially upright state, is held in a posture inclining outward and rearward, and the storage box rear surface 8c Are formed on a curved surface substantially matching the rear surface 10c of the helmet.

Accordingly, the molding of the storage box 8 is facilitated, and the shape of the sealing member between the storage box 8 and the bottom plate of the sheet 5 serving as a lid is simplified.

Further, as shown in FIGS. 2 and 4, the carburetor 22 and the air cleaner case 23 are offset from each other on the side of the top 10a of the stored helmet 10. The bottom surface of the storage box 8 in this portion is curved upward along the shape of the helmet top 10a as shown in a bottom surface 8a (A) shown in FIG. The space between the air cleaner case 22 and the air cleaner case 23 is increased. 10
(A) is a cross section of the helmet 10 taken along the line AA in FIG.
Is a projection formed on the bottom surface 8a (A) for holding the helmet 10.

Thus, there is more room between the storage box bottom surface 8b and the unit swing type engine 4.
By increasing the cushioning stroke of the cushion unit 18,
Riding comfort can be improved and the storage box 8
Further, the seat 5 can be further lowered, and the rider's feet can be improved.

Further, an oil tank 30 is arranged below the front of the bottom surface 8a of the storage box 8. Since the storage box 8 is shallow, there is a space between the bottom surface 8a and the cylinder 12, and the cylinder 12 is mainly displaced in the front-rear direction by the swing of the unit swing type engine 4. It is possible to install the oil tank 30 without difficulty.

As a result, the installation place of the conventional oil tank, for example, the space in the rear body 7 is expanded, and it can be used for increasing the capacity of the fuel tank 9 and arranging other parts.
Further, the distance from the oil pump 27 is short, and the piping is easy.

FIG. 5 shows another embodiment of the present invention. The helmet 10 is stored in a horizontal position, and the open bottom surface 1 of the helmet 10 in the upright state.
0b is held inclined upward and outward. In the case where the helmet 10 in the horizontal state is stored so that the opening bottom surface of the helmet 10 is inclined upward and outward toward the upper side, the top side is inclined upward, so that the bottom of the storage box 8 is increased accordingly, The distance from the unit swing type engine 4 increases. By arranging the carburetor 22 and the air cleaner case 23 at the increased interval,
The buffer stroke is further increased.

That is, the opening bottom surface 10 of the helmet 10
Due to the inclination of b, the curved surface from the side surface 10d to the top surface 10a of the helmet 10 becomes higher, and the storage box bottom surface 8d corresponding to this curved surface also becomes higher accordingly. The carburetor 22 and the air cleaner 23 are arranged below the bottom surface 8d, so that a larger interval between them is ensured.

In this way, the cushioning stroke of the cushion unit 18 can be further increased, and the riding comfort can be greatly improved. In this connection, the storage box 8 and the seat 5 can be lowered, and the rider's foot Performance and steering stability can be improved.

It should be noted that the swing center of the unit swing type engine is similarly applied to the case where the swing center is set above and behind the crankcase 12.

[0047]

In the scooter type motorcycle according to the present invention, the height dimension of the carburetor is reduced by not taking out the throttle cable from the top of the carburetor in consideration of the relationship between the storage box and the throttle cable. The carburetor can be made small and compact, and the carburetor can be pulled out from the side of the carburetor to improve maintainability of the carburetor. Since the bottom of the box can be formed to be shallow, a large amount of vertical swing of the unit swing type engine can be secured while securing the storage of the storage box. Furthermore, while the carburetor can be arranged close to the storage box side and the carburetor can be arranged at a high position, the storage box can be positioned low even if the carburetor is provided at a high position, and the seat can be stored even if the helmet is stored in the storage box The height of the storage box is improved by lowering the height and the front side of the storage box in the plan view is narrower than the rear side of the vehicle. Can be. In addition, since the storage box has a convex portion at a required position on the bottom of the box, the helmet can be stored and held in the storage box using this convex portion, and the contact area between the helmet and the storage box is reduced and the helmet and the storage Dirt in the box can be reduced.

Also, in this scooter type motorcycle, the height of the carburetor is reduced by not taking out the throttle cable from the top of the carburetor in consideration of the shape of the storage box and the positional relationship between the helmet and the throttle lever. It can be formed compactly, and the throttle cable is not forcibly bent, so operability is good, and the front and rear dimensions of the storage box are larger than the box depth dimension to secure the box capacity, and the swing unit The vertical swing amount of the model engine can be increased to improve ride comfort, and the seat height can be reduced to improve rider footing and improve steering stability. Locate the rear wheel and air cleaner case below the top and above the step board Scan bottom can be placed as low as possible, correspondingly, to the seat height lower can be further improved foot reach of the rider.

Further, by making the bottom of the storage box substantially horizontal, there is no partial displacement of the articles due to the bottom shape of the storage box in the storage box, and the box storage capacity can be ensured. It is easy to store articles evenly in the box.

[Brief description of the drawings]

FIG. 1 is a side view of a scooter type motorcycle showing an embodiment of the present invention.

FIG. 2 is a plan view of the motorcycle of FIG. 1;

FIG. 3 is a plan view showing the relationship between the storage box and the helmet in FIG. 1;

FIG. 4 is a rear view taken along the line AA of FIG. 1;

FIG. 5 shows a scooter type automatic 2 showing another embodiment of the present invention.
Rear view of a wheeled vehicle.

FIG. 6 is a side view of a scooter-type motorcycle provided with a conventional helmet storage device.

FIG. 7 is a side view of a scooter-type motorcycle provided with a conventional helmet storage device.

FIG. 8 is a side view of a scooter-type motorcycle provided with a conventional helmet storage device.

FIG. 9 is a side view of a scooter-type motorcycle provided with a conventional helmet storage device.

[Explanation of symbols]

 Reference Signs List 1 front wheel 2 rear wheel 4 unit swing type engine 5 seat 7 rear body 8 storage box 8a bottom surface 8b side surface 8c rear surface 8d bottom surface 9 fuel tank 10 helmet 10a top surface 10b open bottom surface 10c rear surface 10d side surface 12 cylinder 13 crank case 14 swing case 18 Rear cushion unit 19 Exhaust passage 20 Muffler 22 Carburetor 23 Air cleaner case 28 Gap 30 Oil tank

Claims (3)

(57) [Claims] 1. A cylinder that is tilted substantially horizontally forward, a crankcase connected to a rear portion of the cylinder, a swing case connected to the crankcase and extending rearward, and a swing case that is pivotally supported by a rear portion of the swing case. A unit swing type engine is formed by unitizing a wheel, a carburetor arranged in the upper front of the rear wheel, and an air cleaner case connected to the carburetor, and the unit swing type engine is a rear body having a storage box. In a scooter type motorcycle which is pivotally supported at the lower part of the vehicle and is bufferably suspended by a rear cushion unit so as to be able to swing up and down, the storage box is such that, in plan view, the front side of the vehicle is compared to the rear side of the vehicle. The width of the box opening in the front-rear direction of the vehicle is The storage box has a larger dimension, and furthermore, the storage box is provided with a convex portion protruding inside at the bottom of the box near the center in the vehicle width direction, and the helmet stored in the storage box and held by the convex portion is substantially provided. A throttle lever of the carburetor is disposed below the center, and the carburetor is disposed above the unit swing type engine and near the center in the vehicle width direction and in front of the rear wheel, and the throttle lever is operated from the side by a throttle cable. On the other hand, when the unit swing type engine swings upward around the pivot, the top of the carburetor approaching the bottom of the storage box is located above the throttle cable. 2. A cylinder that is tilted substantially horizontally forward, a crankcase connected to a rear portion of the cylinder, a swing case connected to the crankcase and extending rearward, and a swing case supported by a rear portion of the swing case. A unit swing type engine is formed by unitizing a wheel, a carburetor arranged in the upper front of the rear wheel, and an air cleaner case connected to the carburetor, and the unit swing type engine is a rear body having a storage box. In a scooter-type motorcycle which is pivotally supported by a pivot at a lower portion and is vertically suspended and swingable by a rear cushion unit and provided with a step board on a vehicle front side of the rear body, the storage box includes: When the front side of the vehicle is formed to have a narrower opening width than the rear side of the vehicle in plan view. In addition, the box opening dimension in the vehicle front-rear direction should be larger than the box depth dimension,
The storage box has a height at the bottom of the box below the apex of the rear wheel or the air cleaner case and a height range above the step board, and the carburetor is located above the unit swing type engine and near the center in the vehicle width direction. The throttle cable is pulled out from the side of the carburetor by positioning the throttle lever on the side of the carburetor while being arranged in front of the rear wheel, and the starting point of the drawn-out throttle cable is substantially at the center of the storage box in plan view. A scooter-type motorcycle, wherein the top of the carburetor which approaches the bottom of the storage box is located above the throttle cable when the unit swing type engine swings upward around a pivot. car. 3. The scooter-type motorcycle according to claim 1, wherein the storage box has a substantially horizontal bottom in a side view.