JP3206250B2 - Scooter type vehicle - 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 vehicle,
Particularly, the present invention relates to a scooter type vehicle capable of introducing clean outside air into a V-belt room and improving the maintainability of an engine.

[0002]

2. Description of the Related Art For example, in a swing type power unit employed in a scooter type vehicle, a crankshaft and a driven shaft of an engine are arranged side by side in a V-belt chamber in a transmission case connected to an engine provided in the power unit. Are connected via a V-belt type continuously variable transmission.

However, the above-described V-belt type automatic continuously variable transmission is housed in a hermetically sealed V-belt chamber, and has a heat generating portion such as a drive pulley and a driven pulley and a contact portion between the V-belt. Tends to rise in temperature. In particular, when the conduction case is made compact, the tendency is increased, and the V-belt has a problem that deterioration is accelerated by heat generation.

Accordingly, an air inlet is provided in the conduction case,
There is a type in which outside air is introduced into a V-belt chamber by an intake fan formed integrally with a drive pulley to cool the above-described heat generating portion.

[0005] However, the outside air usually contains dust and moisture, and if this outside air is introduced directly into the V-belt chamber, each device in the V-belt chamber may be damaged. An air cleaner for room cooling air is provided near the conduction case.

Since the engine of a scooter type vehicle is covered with a vehicle body cover, a part of the vehicle body cover in front of the engine is opened for maintenance and inspection of the engine and the like, and the opening is closed. Some have a maintenance lid that can be opened and closed freely.

[0007]

However, if an air cleaner for the cooling air of the V-belt chamber is provided near the conduction case, dust, muddy water, etc., which the rear wheel rolls up while traveling, is sucked into the air cleaner for the cooling air of the V-belt chamber. The dust or muddy water that has clogged the filter or
There is a possibility that the intrusion into the belt chamber may cause damage to each device in the V-belt chamber.

Generally, an air cleaner for intake of the engine is arranged near the conduction case, so that the space around the air cleaner is narrow, and it is difficult to install an air cleaner for cooling air in the V-belt chamber.

Further, the installation of the air cleaner for the cooling air in the V-belt chamber causes an increase in the number of parts and weight, and an increase in cost.

On the other hand, the lower edge of the conventional maintenance / inspection opening is located at a higher position than the engine, and particularly, maintenance / inspection of the lower surface of the engine is not easy.

The present invention has been made in view of the above circumstances, and has as its object to provide a scooter type vehicle capable of introducing clean outside air into a V-belt chamber in a conduction case.

Another object of the present invention is to provide a scooter-type vehicle with improved engine maintainability.

[0013]

According to a first aspect of the present invention, there is provided a scooter type vehicle having an engine disposed substantially horizontally and a side of the engine. A power unit, which is integrally provided with a transmission case extending rearward from the rear end and holding a rear wheel at a rear end thereof, is erected at a lower center portion of a body frame formed of a down tube and a rear frame, Swing freely on a pivot shaft disposed below and elastically support via a rear shock absorber, and transmit the driving force of the engine to the rear wheel to a V-belt chamber formed in the transmission case. A V-belt continuously variable transmission is provided, and an outside air inlet for introducing outside air into the V-belt chamber is formed in front of the conduction case to cool the V-belt continuously variable transmission. On the other hand, an article storage room is provided below the driver's seat, the entire vehicle body is covered with a vehicle body cover, and an opening for maintenance and inspection of the engine and the like is provided at a position in front of the engine on the vehicle body cover. In a scooter-type vehicle provided with a maintenance lid for opening and closing the opening freely, an outside air intake port is formed in a concave shape at a lower portion of the maintenance lid, and an intake chamber is disposed behind the outside air intake port. And a connection pipe formed of a bendable and expandable material to connect the outside air inlet on the front side of the conduction case to the outside, and a means for blocking foreign matter in the outside air is provided between the back surface of the outside air suction port and the suction chamber. Things.

[0014]

According to the present invention having the above-described structure, the engine is provided integrally with a substantially horizontally arranged engine and a transmission case extending rearward from one side of the engine and holding a rear wheel at a rear end thereof. The power unit is installed at the center lower part of the body frame composed of the down tube and the rear frame, swings freely on the pivot shaft arranged below the engine, and elastically supports via the rear shock absorber A V-belt type continuously variable transmission for transmitting the driving force of the engine to the rear wheel is provided in a V-belt chamber formed in the transmission case, and outside air is introduced into the V-belt chamber at a front side of the transmission case. The V-belt type continuously variable transmission is configured to cool the V-belt continuously variable transmission by providing an article storage chamber below an operation seat. It is covered with a cover, maintenance and the engine such as the engine forward position of the vehicle body cover
In a scooter-type vehicle provided with an opening for inspection and a maintenance lid for opening and closing the opening, an outside air intake port is formed in a concave shape at a lower portion of the maintenance lid,
An intake chamber is disposed on the back side of the outside air intake port, and the intake chamber and the outside air introduction port on the front side of the conduction case are connected by a connection pipe formed of a bendable and expandable material. Since a means for blocking foreign matter in the outside air is provided between the back surface and the intake chamber, the clean outside air is supplied to the V inside the conduction case.
In addition to being able to be introduced into the belt chamber, maintenance and inspection of the engine can be performed without removing the connection pipe from the outside air intake port, and the maintainability of the engine is improved.

[0015]

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

FIG. 1 is a left side view showing an example of a scooter type vehicle to which the present invention is applied.

In FIG. 1, the scooter type vehicle 1 has an underbone type vehicle body frame 2. The vehicle body frame 2 has a down tube 3, a front end fixed to the down tube 3, and a pair of right and left extending upward and rearward. And a rear frame 4.

A pivot shaft 5 extending in the vehicle width direction is provided at a lower center portion of the body frame 2, and a power unit 7 is swingably provided on the pivot shaft 5 via a link 6. As clearly shown in FIG. 1, the power unit 7 integrally or integrally includes an engine 8 disposed substantially horizontally and a transmission case 9 extending rearward from one side of the engine 8. The pivot shaft 5 is shown in FIG.
Is clearly shown below the engine 8.

At the rear end of the transmission case 9, a rear wheel 10, which is a driving wheel, is held. The transmission case 9 also serves as a swing arm, and is elastically supported by the rear frame 4 by the rear suspension 11. The inside of the transmission case 9 is a V-belt chamber 12, in which a V-belt type continuously variable transmission (not shown) is arranged. An outside air inlet 13 for introducing outside air into the V-belt chamber 12 is formed in front of the conduction case 9.

Above the vicinity of the joint between the down tube 3 and the rear frame 4, a rear leg shield 15 constituting a part of the vehicle body cover 14 is provided. As shown in FIG.
The rear leg shield 15 is used for maintenance and maintenance of the engine 8 and the like.
An inspection opening 16 is formed, and the opening 16 is closed by a maintenance lid 17 that can be freely opened and closed. Also,
As shown in FIG. 3, the lower end of the maintenance lid 17 extends substantially forward to form an extension 18.
8 constitutes a part of the step floor 19. Further, a floor mat 20 is provided on the step floor 19 of the rear leg shield 15 and on the extension 18 of the maintenance lid 17.

As shown in FIG. 1, an upper frame cover 21 which is a part of the vehicle body cover 14 and is integrally formed on the left and right, for example, is provided around the rear frame 4 so as to surround the upper portion of the rear frame 4. Below the upper frame cover 21, a lower side cover 22 is provided divided into right and left. Also, upper frame cover 2
For example, an operation seat 23 that can be opened and closed in the front
An article storage section 24 capable of storing a helmet or the like is provided immediately below the operation seat 23.

FIG. 4 is a front view of the maintenance lid 17, and FIG. 5 is a sectional view taken along line XX of FIG. FIG. 6A is a sectional view taken along line AA of FIG.
FIG. 6B is a cross-sectional view taken along the line BB of FIG.
FIG. 5C is a sectional view taken along line CC of FIG. 4.

As shown in these figures, an outside air inlet 25 is formed below the maintenance lid 17 and near the boundary with the extension 18. This outside air intake port 25 is shown in FIG.
As shown in (a), it is formed in a concave shape, and its bottom 25a is opened. Further, a rib 26 serving as a means for blocking foreign matter in the outside air is formed on the right back surface of the outside air intake port 25 in FIG. 4, as shown in FIG. 6B. And the rib 26
The bottom portion 25b of the outside air intake port on the right side in FIG.
It is closed as shown in FIG.

On the back side of the outside air intake port 25, an intake chamber 27 is mounted so as to close the outside air intake port 25.

FIG. 7A is a front view of the intake chamber 27, FIG. 7B is a top view of the intake chamber 27, and FIG.
(C) is a left side view of the intake chamber 27. Further, FIG.
7 is a cross-sectional view taken along the line DD in FIG. 7A, and FIG. 9 is a cross-sectional view taken along the line EE in FIG. 8. In both FIGS. 5 shows a state where the air filter is attached to the back side of the outside air intake port 25 of FIG.

As shown in these figures, the edge 28 of the intake chamber 27 is formed in a shape along the rear surface of the maintenance lid 17. A drain hole 29 is provided at the bottom of the intake chamber 27.
Is drilled.

The rib 2 formed on the back surface of the outside air intake port 25
A rib 30 is formed in the intake chamber 27 at a location corresponding to 6 as a means for blocking other foreign matter in the outside air. And
The ribs 26 and 30 are aligned to form the foreign matter blocking plate 31. The foreign matter blocking plate 31 is provided, for example, in the upper half of the intake chamber 27, and the left side of the intake chamber 27 in FIG. 7A is the outside air introduction chamber 27a, and the right side thereof is the outside air discharge chamber 27.
and a communication passage 27 below the foreign matter blocking plate 31.
c is provided. The lower end of the foreign matter blocking plate 31 is disposed below the outside air intake port 25.

An outside air outlet 32 is provided on the back side of the outside air discharge chamber 27b.
Is formed. As shown in FIG. 3, one end of a connection pipe 33 formed in a bellows shape with a material that can be bent and stretched, such as rubber, is connected to the outside air discharge port 32. The other end of the connection pipe 33 is connected to an outside air inlet 13 formed in front of the conduction case 9. The connection pipe 33 connects the discharge chamber in the intake chamber 27 and the V-belt chamber 12 in the conduction case 9 through the space above the pivot shaft 5, as clearly shown in FIG. In addition, you may arrange | position a filter element, such as a sponge, not shown in the outside air discharge port 32. FIG.

As shown in FIG. 7A, a plurality of pin holes 28a are formed in the edge 28 of the intake chamber 27. As shown in FIGS. 4 and 5, a plurality of mounting pins 34 are formed on the rear surface of the maintenance lid 17 at positions corresponding to the pin holes 28 a of the intake chamber edge 28. And FIG.
As shown in (a) and (b), the suction chamber 27 is provided with the maintenance lid 1 by fitting the pin hole 28a into the mounting pin 34 and applying heat to the tip of the mounting pin 34 to melt it.
7 are integrally fixed. In addition, maintenance lid 1
The packing material 35 is provided between the rear surface of the
Is interposed.

Next, the operation of the present embodiment will be described.

In the present invention, since the outside air intake port 25 is formed below the maintenance lid 17 and near the boundary with the extension 18, there is no need to dispose an air cleaner for the cooling air in the V-belt chamber 12. While it is possible to reduce the weight, there is no danger that dust, muddy water, etc., which is wound up by the rotation of the rear wheel 10 during traveling, will be sucked.

Further, since the outside air intake port 25 is formed in a concave shape, clothes and the like of the rider are not caught and the appearance is improved.

Further, by providing a foreign matter blocking plate 31 as a means for blocking foreign matter in the outside air in the intake chamber 27,
As shown by the arrows in FIGS. 8 and 9, dust and moisture in the outside air introduced from the outside air intake port 25 into the outside air introduction chamber 27 a are blocked by the foreign matter blocking plate 31, and only the clean air passes through the communication passage 27 c. The air is guided to the outside air discharge chamber 27b, and from the outside air discharge port 32 to the V-belt chamber 12 in the conduction case 9 through the connection pipe 33. As a result, there is no possibility that each device in the V-belt chamber 12 will be damaged. The foreign matter blocking plate 31
The water that is blocked by the water and accumulated in the intake chamber 27 is discharged from the drain hole 29.

Furthermore, since the lower end of the maintenance lid 17 extends substantially forward to form an extension 18, which forms a part of the step floor 19,
An opening 16 for maintenance and inspection of the engine 8 and the like formed in the rear leg shield 15 is enlarged, so that the maintenance and inspection of the lower surface of the engine 8 which is conventionally difficult to reach is facilitated. Since the floor mat 20 is installed on the step floor 19 of the rear leg shield 15 and on the extension 18 of the maintenance lid 17, the mating surface between the step floor 19 and the extension 18 is hidden, and the appearance is reduced. There is no loss.

The outside air discharge chamber 27b in the intake chamber 27
Since the connecting pipe 33 for communicating between the connecting pipe 33 and the V-belt chamber 12 in the conductive case 9 is formed in a bellows shape with a material that can be bent and stretched, for example, rubber or the like, it is necessary to remove the connecting pipe 33 when the maintenance lid 17 is removed. Therefore, the maintainability of the engine 8 can be improved. Further, as described above, the power unit 7 swings up and down, and the outside air inlet 1 of the conduction case 9 is rotated.
Although the relative position between the outside air outlet 3 and the outside air outlet 32 of the intake chamber 27 constantly fluctuates, the change in the relative position is absorbed because the connecting pipe 33 is freely bendable.

Although the present invention has been described with respect to the case where outside air is introduced into the V-belt chamber to cool the heat generating portion, the connecting pipe is connected to an air cleaner for intake of the engine, and clean outside air is introduced into the air cleaner. You may.

[0037]

As described above, according to the scooter type vehicle according to the present invention, the engine disposed substantially horizontally,
A power unit integrally extending from one side of the engine and extending rearward and holding a rear wheel at the rear end is installed at the lower center of the body frame consisting of a down tube and a rear frame. Swing freely on a pivot axis located below the engine,
A V-belt type continuously variable transmission that resiliently supports via a rear shock absorber and transmits the driving force of the engine to the rear wheels in a V-belt chamber formed in the transmission case; An outside air inlet for introducing outside air into the V-belt chamber is formed at the front side of the V-belt type continuously variable transmission to cool the V-belt type continuously variable transmission. A scooter-type vehicle, which is provided with a cover for maintenance and inspection of the engine and the like at a position in front of the engine on the vehicle body cover and a maintenance lid for opening and closing the opening so as to be able to open and close. An outside air intake port is formed in a concave shape at a lower portion, and an intake chamber is disposed behind the outside air intake port. Means for shutting off foreign matter in the outside air is provided between the back surface of the outside air suction port and the suction chamber while the connection is made by a connection pipe formed of a bendable and stretchable material. In addition to being able to be introduced into the room, maintenance and inspection of the engine can be performed without removing the connecting pipe from the outside air intake port, and the maintainability of the engine is improved.

[Brief description of the drawings]

FIG. 1 is a left side view showing one embodiment of a scooter type vehicle according to the present invention.

FIG. 2 is a diagram showing a mounting structure of a vehicle body cover.

FIG. 3 is a perspective view of a rear leg shield and a maintenance lid.

FIG. 4 is a front view of a maintenance lid.

FIG. 5 is a sectional view taken along line XX of FIG. 4;

6A is a sectional view taken along line AA in FIG. 4, FIG.
4 is a cross-sectional view taken along the line BB of FIG. 4, and FIG. 4C is a cross-sectional view taken along the line CC of FIG.

7A is a front view of the intake chamber, FIG. 7B is a top view of the intake chamber, and FIG. 7C is a left side view of the intake chamber.

FIG. 8 is a sectional view taken along line DD in FIG. 7 (a).

FIG. 9 is a sectional view taken along the line EE in FIG. 8;

FIG. 10 is a diagram showing a method of attaching the intake chamber to the maintenance lid.

[Description of Signs] 1 Scooter type vehicle 2 Body frame 7 Power unit 8 Engine 9 Conductive case 12 V-belt chamber 13 Outside air inlet of conductive case 15 Rear leg shield (body cover) 16 Rear leg shield opening 17 Maintenance lid 18 Maintenance Extension part of lid 25 Outside air intake port 26 Rib on back side of outside air intake port (means for blocking foreign matter in outside air) 27 Intake chamber 30 Rib in intake chamber (means for blocking foreign matter in outside air) 31 Foreign matter blocking plate (in the outside air) 33 Connecting pipe

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 39/00 B62J 23/00 B62M 9/08

Claims (1)

(57) [Claims] A down tube and a power unit integrally comprising an engine disposed substantially horizontally, and a transmission case extending rearward from one side of the engine and holding a rear wheel at a rear end thereof. It is erected at the center lower part of a body frame composed of a rear frame and swingably mounted on a pivot shaft arranged below the engine, and elastically supported via a rear shock absorber. A V-belt type continuously variable transmission for transmitting the driving force of the engine to the rear wheel is provided in the formed V-belt chamber, and an outside air inlet for introducing outside air into the V-belt chamber is formed at the front side of the transmission case. While the V-belt type continuously variable transmission is configured to cool, an article storage room is provided below the operation seat, and the entire vehicle body is covered with a vehicle body cover. In a scooter-type vehicle provided with an opening for maintenance and inspection of the engine and the like at a position in front of the engine of the bar and a maintenance lid for opening and closing the opening, an outside air intake port is formed at a lower portion of the maintenance lid. In addition to disposing an intake chamber behind the outside air intake port, the intake chamber and the outside air introduction port on the front side of the conduction case are connected by a connection pipe formed of a bendable and expandable material. A scooter type vehicle provided with means for blocking foreign matter in the outside air between a back surface of an outside air intake port and the intake chamber.