JP3187040B2 - Scooter type vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a scooter type vehicle in which a storage box is installed in a rear body below a seat and a unit swing type engine is arranged below the storage box.

[0002]

[Prior art]

The layout of the rear body on which the seat is mounted is set to a relatively large volume and has a storage box inside, and the unit swing type engine is arranged under it, so that it is laid on the step part in front of the seat, which is a characteristic of scooter type vehicles is there.

FIG. 4 shows a conventional typical scooter type motorcycle.

A front wheel a steered by a steering wheel c and a rear wheel b driven by an engine d are disposed in front and rear, and a steering wheel c and a seat e
And the step board f is laid, the sheet e is placed on the rear body h also serving as the storage box g, and the unit swing type engine d is placed under the rear body h.
Is arranged.

[0005] In the unit swing type engine, a crankcase j is connected to the rear of a cylinder i inclined forward substantially horizontally, and a swing case k is connected to the rear from one side of the crankcase j. A rear wheel b located immediately behind the case j is pivotally supported, a front lower support arm 1 is pivotally supported on a frame n by a pivot m so as to be vertically swingable, and a rear upper part is supported by a rear cushion unit o. Then, it is buffered and suspended.

[0006] The exhaust pipe p is led downward from the cylinder i, and is connected to a muffler q extending rearward and upward around the opposite side of the swing case k. The intake pipe r is introduced into an upper front part of the crankcase j. The carburetor s connected to the intake pipe r is located above and behind the crankcase j, and the air cleaner t is further connected to the rear.

In such a unit swing type engine, the stroke amount of the rear cushion unit o is determined by the position and 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, in the case of parts located farther from the pivot m, in this case, the swing stroke amount at the time of buffering, such as the muffler q and the air cleaner case t, becomes larger, and the stroke amount depends on the relative position to the bottom of the storage box g. It was not an exaggeration to say.

For this reason, the stroke amount of the rear cushion unit o is increased with an emphasis on riding comfort, the seat height is improved by lowering the seat height, or the shape of the bottom surface of the storage box g is improved to reduce the capacity. There are restrictions on the desire to increase the size, and in many cases, not all of them can satisfy individual requirements.

[0009]

[Problems to be solved by the invention]

The present invention has been made in view of the above circumstances,
The purpose of this invention is to provide a scooter-type vehicle that arranges the upper part of a unit swing type engine, rationalizes the positional relationship with the bottom of the storage box, and helps to improve the stroke amount, seat height, and storage box capacity of the rear cushion unit. And

[0010]

[Means for Solving the Problems]

In order to solve the above-mentioned problem, the scooter type vehicle according to the present invention, as described in claim 1, has a step portion formed by deeply indenting between the handle and the seat, and is housed in the rear body below the seat. A box is installed, and a unit swing type engine is mounted below the rear body. The unit swing type engine is provided with a crankcase having a cylinder that tilts forward substantially horizontally, and a rearward portion connected to the crankcase and extending rearward, A swing case integrally supporting the rear wheel, and an intake system component such as an intake passage, a carburetor, and an air cleaner provided above the crankcase and below the storage box. The unit swing type engine is buffered and suspended so that it can swing up and down around a pivot shaft provided in the crankcase. In the scooter type vehicle, (A) the storage box is configured so that a full face helmet can be stored in an upright state, and a box bottom front portion is located above a cylinder front and a box bottom rear portion is above a front portion of an air cleaner case. (B) an exhaust passage derived from the unit swing type engine extends to a side opposite to the vehicle width direction of the swing case,
The muffler is connected to a muffler disposed toward the rear upper side on the side of the rear wheel, and the top of the muffler is higher than the top of the air cleaner, and is located on the vehicle rear side from the top of the rear wheel, ( C) The air cleaner case is formed in a long shape that is long in the vehicle front-rear direction and is disposed on the side of the rear wheel, while the carburetor is disposed in front of the rear wheel and inward of the air cleaner case in the vehicle width direction, and (D) The side profile of the upper part of the unit swing type engine is located on the front side of the unit swing type engine when viewed from the side of the vehicle. The air cleaner casing is located below a common tangential line that is in contact with the top profile of the blower fan casing and the top profile of the muffler. (E) when the unit swing type engine makes the maximum swing stroke upward, a common tangential line is formed near the bottom surface of the storage box and substantially parallel to the bottom surface; The unit swing type engine is configured such that only the top of the carburetor partially projects upward from the common tangential line when viewed from the side of the vehicle.

[0011]

[Action]

In the scooter type vehicle according to the present invention, the side profile of the upper surface of the unit swing type engine has a simplified positional relationship with the storage box, and the trajectory and range of the swing around the pivot are also simplified. Therefore, it is easy to increase the stroke amount of the reaction unit, which helps to improve the ride comfort.

[0012] In this connection, the seat height can be reduced and the footwear can be improved, and the degree of freedom in the shape of the bottom surface of the storage box can be increased, so that the capacity can be easily expanded. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a scooter type vehicle according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a right side view showing an embodiment of a scooter type vehicle according to the present invention, FIG. 2 is a plan view of the scooter type vehicle, and FIG. 3 is a left side view of the scooter type vehicle.

The front wheel 1 steered by the steering wheel 3 and the rear wheel 2 driven by the unit swing type engine 4 are supported. The gap between the steering wheel 3 and the seat 5 is lowered and a step portion 6 is laid. Therefore, the rear body 7 on which the seat 5 is mounted is set to a relatively large volume, and the unit swing type engine 4 integrated with the rear wheel 2 is disposed below the rear body 7.

In the rear body 7, a storage box 8 is installed at a front part, and a fuel tank 9 and an oil tank 10 are arranged at a rear part. The storage box 8 has a volume that allows the full face helmet 11 to be stored in the upright state shown in FIG.

In the unit swing type engine 4, a crankcase 13 is connected to the rear of a cylinder 12 that leans forward substantially horizontally,
Swing case back from one side of the crankcase 13
The rear wheel 2 is pivotally mounted at the rear of the rear wheel 2 at a position immediately behind the crankcase 13. Crankcase 13
A support arm 15 is provided at a lower front portion of the support arm 15.
Is pivotally supported on a frame 17 by a pivot 16 so as to be able to swing up and down, and a rear upper portion is supported by a reaction unit 18 to be buffer-suspended.

An exhaust passage 19 extends from the lower surface of the cylinder 12 of the unit swing type engine 4, and is disposed on the side of the rear wheel 2 opposite the swing case 14 across the rear wheel 2 and extends rearward and upward. Connected to.

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 part of the crankcase 13 through an intake passage 21, and further connected to an air cleaner 23 behind the carburetor 22. . The intake passage 21, the carburetor 22, and the air cleaner 23 constitute the intake system components of the unit swing type engine 4, and as shown in FIG.
As shown in FIG. 2, they are sequentially arranged from the center in the vehicle width direction to the outside in the vehicle width direction. In the carburetor 22, a throttle lever box 28 surrounding the throttle lever is located on a side surface, from which a throttle cable is led forward.

In addition, an ignition ignition coil 24 is mounted on a front portion of one side of the crankcase 13. The ignition ignition coil 24 is provided on the other side of the blower fan casing 26 provided on the other side of the crankcase 13. An oil pump 25 for lubricating various parts of the engine is arranged at the front upper portion of the crankcase 13 adjacent to the front of the introduction portion of the intake passage 21.

Further, this engine is of a forced air-cooled type, and the surface of the cylinder 12 is covered with a cowling for guiding air.
A casing 26 of a blower fan, which is pivotally supported at the end of the crankshaft, is attached to the crankcase 13 opposite to 14.

Accordingly, as shown in FIG. 2, the fan casing 26 and the muffler 20 are arranged in substantially the same row on one side of the vehicle body, and
An air cleaner 23 is disposed above the exhaust passage 20 and the exhaust passage 19. The cleaner case 23a of the air cleaner 23 is also disposed at substantially the same position as these, and the rear end of the intake passage 21 is bent to the side and connected to the air cleaner case 23a. As shown in FIGS. 1 and 2, the air cleaner case 23 a is formed in a long shape that is long in the vehicle front-rear direction, and is disposed on the side of the rear wheel 2. An air cleaner case in front of the rear wheel 2
The carburetor 22 is arranged on the inner side in the vehicle width direction than 23a.

In this embodiment, as shown in FIG. 1, the frontmost top of the unit swing type engine 4 is a fan casing.
The top of 26 forms a side profile L1 of the fan casing 26 and a side profile L2 of the upper edge of the muffler 20.
In a substantially triangular space (shown by hatching in FIG. 3) below a common tangential line L3 that contacts the top of the fan casing 26 and the muffler 20, the side profiles of the carburetor 22 and the air cleaner case 23a are substantially The shape and size of the air cleaner 23 with the carburetor 22 are set so as to fit.

As shown in FIG. 1, a common tangential line L 3 that contacts the front-side top-side profile of the unit swing type engine 4 and the top-side profile of the muffler 20.
Oil pump 25, ignition coil 24 for ignition,
The air blower casing 26 and the air cleaner case 23a of the air cleaner 23 are arranged so as not to protrude toward the storage box 8 side. The carburetor 22 is set such that the top is located substantially on the common tangential line L3. In particular,
As shown in FIG. 1, the carburetor 22 is arranged such that only the top part is slightly protruded from the common tangential line L3 to the storage box 8 side.

Thus, when the unit swing type engine 4 swings up and down around the pivot 16, the side profile of the engine upper surface portion swings together with the common tangential line L 3, and the unit swing type engine 4 moves When swinging upward, the common tangential line L3 approaches the flat bottom surface 8a of the storage box 8 and becomes almost parallel to the bottom surface 8a, so that the blower fan casing 26, the oil pump 2
5. The carburetor 22 and the air cleaner 23 are moved closer to the bottom surface 8a of the storage box 8. At this time, the unit swing type engine 4 starts the carburetor from the common tangential line L3.
Since only the top of the carburetor 22 projects slightly toward the storage box 8, the swing amount of the unit swing type engine 4 can be easily managed by one location management using only the top of the carburetor 22 as a management point. Therefore, the positional relationship between the upper part of the unit swing type engine 4 and the bottom surface 8a of the storage box 8 and the swing trajectory are simplified, and in the case of the maximum swing stroke, the state of the line 13 indicated by the dotted line is obtained.

As a result, the stroke amount of the rear cushion unit is increased, the riding comfort is improved, the seat height is reduced, the footwear is improved, and the capacity is expanded by setting the shape of the bottom surface of the storage box without restriction. Is made possible without difficulty.

The pivot serving as the swing center of the unit swing type engine 4 may be one that is set above the front of the crankcase 13 (16a in FIG. 3).

In this scooter type vehicle, an intake passage 21 which is an intake system component of the unit swing type engine 4, a carburetor
Since the air cleaner 22 and the air cleaner 23 are arranged above the crankcase 13 and the swing case 14 and sequentially arranged from the center in the vehicle width direction to the outside in the vehicle width direction, the crankcase
By effectively utilizing the upper surfaces of the swing case 13 and the swing case 14 in a plane, components to be attached to the unit swing type engine 4 can be efficiently arranged. In the unit swing type engine 4, the air-fuel mixture from the carburetor is supplied from the upper part of the crankcase 13 in the vehicle width direction to eliminate the deviation of the air-fuel mixture in the vehicle width direction. It is guided left and right equally to stabilize combustion and improve output.

[0028]

【The invention's effect】

In the scooter type vehicle according to the present invention, the intake passage, the carburetor, and the long air cleaner, which are intake system components, can be efficiently arranged in a plane on the upper part of the unit swing type engine, and the mixture from the carburetor is centered in the vehicle width direction. The mixture is supplied into the crankcase from the side, and the mixture is guided uniformly in the left and right directions in the cylinder without any bias in the vehicle width direction, thereby stabilizing the combustion and improving the engine output.

Further, in the scooter type vehicle according to the present invention, a common tangential line contacting the side profile of the top of the blower fan casing located on the front side of the unit swing type engine and the side profile of the top of the muffler. Since the air cleaner case is located below the line, the side profile of the upper surface of the unit swing type engine is simplified, the positional relationship with the storage box can be simplified, and the degree of freedom of the bottom shape of the storage box is large. As a result, the bottom of the storage box can be brought closer to the unit swing type engine, and the storage box can be enlarged and its capacity increased accordingly, while the seat height of the seat can be reduced and footwear can be improved. As a result, steering stability can be improved.

Further, since it is not necessary to arrange a carburetor in front of the cylinder of the unit swing type engine, the front portion of the unit swing type engine can be compactly and compactly reduced, while the storage box is in a state where the full face helmet is in an upright state. Since it has a space that can be stored in the box, a sufficient area for the bottom of the box can be taken, so that various articles other than the helmet can be efficiently and stably stored, and the storage box can be formed into a versatile storage box.

Further, in the unit swing type engine, when the maximum swing stroke is made upward, the common tangential line is formed near the bottom surface of the storage box and substantially parallel to the bottom surface, and only the top of the carburetor is formed. Since it is configured to partially protrude above the common tangential line and an upright engine is not used as the unit swing engine, the vertical width of the entire unit swing engine can be reduced. Therefore, the interference between the unit swing type engine and the storage box can be reliably prevented by only one location management in which the top of the carburetor does not interfere with the bottom surface of the storage box. Since it is only necessary to consider the interference between the top of the carburetor and the bottom of the storage box, while improving the workability of attaching and detaching the unit swing type engine, the positional relationship between the side profile of the upper surface of the engine and the storage box is simplified, The trajectory and range of swing around the pivot are also simplified. Therefore, it is easy to increase the stroke amount of the rear cushion unit, and the riding comfort can be improved and improved.

[Brief description of the drawings]

FIG. 1 is a right 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 left side view of the motorcycle of FIG. 1;

FIG. 4 is a right side view of a conventional scooter type motorcycle.

[Explanation of symbols]

 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 18 …… Rear cushion unit 19 …… Exhaust passage 20 …… Muffler 23 …… Air cleaner 23a …… Air cleaner case 26 …… Blower fan casing

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-92791 (JP, A) JP-A-1-282084 (JP, A) JP-A-2-95994 (JP, A) JP-A-1- 148678 (JP, A) JP-A-4-55182 (JP, A) JP-A-4-55183 (JP, A) JP-A-4-59493 (JP, A) JP-A-4-59494 (JP, A) Japanese Utility Model Application Hei 2-87956 (JP, U) Japanese Utility Model Application Hei 2-75291 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62J 39/00 G B62J 9/00 G

Claims (1)

(57) [Claims] 1. A step portion in which a gap between a steering wheel and a seat is deepened to form a step portion, a storage box is installed in a rear body below a seat, and a unit swing type engine is mounted below the rear body. Is a crankcase with a cylinder that leans forward substantially horizontally, and is connected to this crankcase and extends rearward,
A swing case integrally supporting a rear wheel at a rear portion, and an intake passage provided above the crankcase and below the storage box, and intake system components such as a carburetor and an air cleaner are unitized and configured. The unit swing type engine is a scooter type vehicle suspended and suspended so as to be able to swing up and down around a pivot shaft provided in a crankcase. (A) The storage box is configured so that a full face helmet can be stored in an upright state. The front of the bottom of the box is located above the front of the cylinder, while the rear of the bottom of the box is located above the front of the air cleaner case. (B) The exhaust passage derived from the unit swing type engine is the vehicle width of the swing case. Extend in the opposite direction,
The muffler is connected to a muffler disposed toward the rear upper side on the side of the rear wheel, and the top of the muffler is higher than the top of the air cleaner, and is located on the vehicle rear side from the top of the rear wheel, ( C) The air cleaner case is formed in a long shape that is long in the front-rear direction of the vehicle and is disposed on the side of the rear wheel, while the carburetor is disposed in front of the rear wheel and inward of the air cleaner case in the vehicle width direction. (D) The side profile of the upper part of the unit swing type engine is located on the front side of the unit swing type engine when viewed from the side of the vehicle. The air cleaner casing is located below a common tangential line that is in contact with the top profile of the blower fan casing and the top profile of the muffler. (E) when the unit swing type engine makes the maximum swing stroke upward, a common tangential line is formed near the bottom surface of the storage box and substantially parallel to the bottom surface; A scooter-type vehicle, wherein the unit swing type engine is configured such that only the top of the carburetor partially protrudes upward from the common tangential line in a side view of the vehicle.