JPH0471972A - Scooter type motorcycle - Google Patents

Abstract

PURPOSE:To increase degree of freedom of the bottom of a receiving box in front of a pivot and enlarge the volume by arranging a carburetor of which a throttle cable is introduced from the side in front of a specified pivot, and arranging the upper end so as to be nearly same height as the axis of the pivot. CONSTITUTION:It is supported with a front wheel 1 steered with a handle 3 and a rear wheel 2 driven with a unit swing type engine 4, and curvedly lowered between the handle 3 and a seat 5 to lay a step board 6. In this case, in a carburetor 22, a throttle lever is positioned on the side and covered with a throttle lever box 25, and a throttle cable 26 is introduced to the front. Further, the carburetor 22 is arranged in front of a pivot 16, and oscillated upward following to oscillation of a cushion unit 18. When the carburetor 22 is oscillated on such uppermost position, the fitting position is set so as to be nearly same height as the axis of the pivot 16 at the upper end 22a.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention relates to a scooter-type two-wheeled motor vehicle that is equipped with a storage box under the seat and a unit swing type engine arranged 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 feature of a scooter type two-wheeled motor vehicle, and an example of a conventional scooter type two-wheeled motor vehicle is shown in FIGS. 4 and 5.

A front wheel a steered by a handle C and a rear wheel driven by an engine d are arranged in the front and rear, and a step board f is laid in a low indentation between the handle C and the seat e. sheet e
is placed on the rear body h which also serves as a storage box g,
A unit swing type engine d is arranged under the rear body h.

In a unit swing type engine, a crankcase j is connected to the rear of a cylinder i 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 pivoted, and a support arm l extending from the rear upper part of the crankcase j is swingably pivoted to the frame by a pivot m, and the rear part of the swing case is supported by a rear cushion. It is supported by unit 0 and is buffer suspended.

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 front upper part of the crankcase j from the front side, and the carburetor S and the air cleaner case t are located on the side of the cylinder i.

In such a unit swing type engine, due to the position and clearance relationship between the upper line and the storage box g,
The stroke amount of rear cushion unit 0 was determined. Similarly, this positional relationship determines the seat height and the shape of the bottom surface of the storage box g.

In particular, since the carburetor S is located in front of the pivot m,
When cushion unit 0 is extended, it will swing upward, and if the vehicle is stood on main stand U, the rear wheels will lift up and cushion unit 0 will be fully extended, swinging to the highest position. do.

Therefore, in this state, in order to avoid interference with the storage box g, the front part of the bottom curves upward, resulting in a problem in that the capacity is reduced. Another problem is that the throttle cable V for controlling the throttle valve is bent at an acute angle near the bottom of the storage box g, making operation difficult.

(Problems to be Solved by the Invention) This invention was made in view of the above circumstances, and the unit swing type engine support pivot is located at the rear upper part of the crankcase, and the carburetor is located in front of the pivot. To provide a scooter type two-wheeled motor vehicle with increased capacity by reducing restrictions on a storage box in front of a pivot.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the scooter type two-wheeled motor vehicle of the present invention has a deep indentation between the handlebar and the seat to form a step board section, and a step board section in the rear body below the seat. A storage box is installed under the rear body, and the unit swing type is made up of a cylinder part that leans forward almost horizontally, and a swing case that extends rearward from the crankcase and integrally supports the rear wheel at the rear. In a scooter-type motorcycle in which the engine is swingably supported by a pivot at the rear and upper part of the crankcase and is cushioned and suspended by a rear cushion unit that engages with the rear part of the swing case, the throttle cable is led out from the side. the carburetor is located forward of the pivot, and
By using the main stand, when the rear cushion unit is fully extended and swings upward, the main stand is installed so that its upper end is approximately at the same height as the pivot axis.

(Function) With this structure, there is a margin between the bottom of the storage box in front of the pivot and the carburetor, and the bottom of the storage box in this area can be formed sufficiently low, increasing the capacity.

Additionally, in connection with this, the seat height can be lowered to improve footing.

(Example) The following describes an example of the present invention with reference to the drawings. 1st
The figure is a right side view, and FIG. 2 is a plan 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 board 6 is laid 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 is set to have a relatively large volume, and the unit swing type engine 4, which is 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.

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 upper end of the support arm 15 extending from the rear upper part of the crankcase 13 is connected to the frame 17 by a pivot 16.
The rear part of the swing case 14 is supported by a rear cushion unit 18, so that the unit swing type engine 4 is buffer-suspended.

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 connected to 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 extends diagonally rearward from the carburetor 22 disposed on the side of the cylinder 12 and extends through the crankcase 1.
It is introduced in the upper front part of 3. The carburetor 22 also has an air cleaner case 23 arranged on the side of the cylinder 12.
is connected.

As shown in FIG. 3, this carburetor 22 has a throttle lever 24 located on the side, a throttle lever box 25 covered by it, and a throttle cable 26 led out from there to the front, and is generally short. It is formed.

Since the carburetor 22 is located in front of the pivot 16, when the vehicle body is stood up on the main stand 27, the rear wheel 2 lifts up, the cushion unit 18 is fully extended, and as it swings, it swings upward. . The mounting position of the carburetor 22 is set so that when the carburetor 22 swings to the uppermost position in this manner, the upper end 22a is approximately at the same height as the axis of the pivot 16.

In this way, the bottom surface 8a of the storage box 8 facing the carburetor 22 can be set low without being restricted by the carburetor 22, and furthermore, the entire bottom surface 8a in front of the pivot 16 can be set horizontally or in a shape inclined forward and downward, and the helmet 11 It is possible to easily secure sufficient capacity to store the .

In addition, in conjunction with this, the height of the seat 5 can be set lower, and the rider's footing can be improved.

Although one embodiment shows an example in which the present invention is applied to a scooter-type two-wheeled motor vehicle, the present invention can also be applied to a scooter-type vehicle such as a scooter-type three-wheeled motor vehicle.

〔Effect of the invention〕

As described above, the scooter type two-wheeled motor vehicle according to the present invention includes a unit swing type engine that is swingably supported by a pivot located above the rear of the crankcase, and a carburetor with a throttle cable led out from the side. It is located forward of the above pivot, and is installed so that when the rear cushion unit is fully extended and swings upward by using the main stand, its upper end is approximately at the same height as the pivot axis. , the degree of freedom of the bottom surface of the storage box in front of the pivot is increased, and the capacity of the storage box can be expanded without difficulty.

[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 present invention, Fig. 2 is a plan view of the two-wheeled motor vehicle shown in Fig. 1, and Fig. 3 is a carburetor shown in Fig. 1. An enlarged side view of
Figure 4 is a right side view of a conventional scooter-type two-wheeled motor vehicle;
The figure is also a plan view. 1...Front wheel, 2...Rear wheel, 4-way unit swing type engine, 5...Seat, 7...Rear body, 8...
...Storage box, 8a...Bottom, 11...Helmet, 12...Cylinder, 13...Crank case, 14...Swing case, 16...Pivot, 1
8... Rear cushion unit, 21... Intake passage, 22... Carb 5, letter, 23... Air cleaner case, 24... Throttle lever, 25... Throttle go-Bo Sox, 26 ... Throttle cable, 27... Main stand.

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 unit swing type engine is formed into a unit by a swing case with a rear wheel integrally supported at the rear, and is pivotably supported by a pivot at the upper rear of the crankcase, and a rear wheel that engages with the rear of the swing case. In a scooter-type two-wheeled motor vehicle that is buffer-suspended by a cushion unit, the carburetor with the throttle cable led out from the side is placed forward of the pivot, and the rear cushion unit is fully extended and moved upward by using the main stand. A scooter-type two-wheeled motor vehicle characterized by being installed so that its upper end is approximately at the same height as a pivot axis when it swings.