JP2001180557A - Scooter type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scooter type vehicle capable of introducing clean air into a V belt chamber in a transmission case. SOLUTION: A shaft 5 is disposed below an engine 8. On the other hand, an intake port 25 for outside air to cool a V belt type continuously variable transmission is provided on the bent part 14a of a body cover 14, and the intake port 25 for the outside air is connected to an inlet 13 for the outside air by a bent and retractable connection pipe 33. The connection pipe 33 is disposed above the shaft 5, below an article storing part 24 and at a height where it overlaps with the engine 8 when viewing from the side of a vehicle.

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.

The present invention has been made in consideration 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.

It is another object of the present invention to provide a scooter type vehicle which makes effective use of space.

[0012]

According to a first aspect of the present invention, there is provided a scooter-type vehicle, comprising: an engine; A power unit integrally provided with a conductive case holding a rear wheel at an end is swingably mounted on a pivot shaft provided at a lower center portion of a body frame formed of a down tube and a rear frame, and a rear unit is provided. While supporting elastically via the suspension,
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 for introducing outside air into the V-belt chamber at the front side of the transmission case. The V-belt type continuously variable transmission is configured so as to cool the V-belt type continuously variable transmission. On the other hand, an article storage portion is provided below the operation seat, the entire vehicle body is covered with the vehicle body cover, and the vehicle body cover in front of the operation seat is attached to the vehicle body cover. In a scooter type vehicle in which a curved portion is formed by curving downward from an operation seat, the pivot shaft is arranged below the engine, and the intake port of outside air for cooling the V-belt type continuously variable transmission is connected to the vehicle body. The connecting portion is provided on the curved portion of the cover, and the outside air intake port and the outside air introducing port are connected to each other by a bending / contractible connecting pipe, and this connecting pipe is provided above the pivot shaft and the article. In paid portion downward, furthermore, in which is disposed at a height that overlaps with the engine in a side view of the vehicle.

In order to solve the above-mentioned problem, the outside air intake port is provided in the vehicle body cover above a joint between a down tube of the vehicle body frame and a rear frame. Things.

[0014]

According to the present invention having the above structure, a power unit integrally including an engine and a transmission case extending rearward from one side of the engine and holding a rear wheel at a rear end thereof is provided. Swing freely on a pivot shaft installed in the lower center of the body frame composed of a tube and a rear frame, and elastically support it via a rear suspension, and a V-belt chamber formed in the conductive case. A V-belt continuously variable transmission for transmitting the driving force of the engine to the rear wheel, and an outside air inlet for introducing outside air into the V-belt chamber is formed at a front side of the transmission case; The vehicle is provided with an article storage section below the driving seat, the entire vehicle body is covered with a vehicle body cover, and the vehicle body cover in front of the driving seat is provided. In the scooter type vehicle to form a curved portion by curving toward from the driver's seat downward,
While placing the pivot shaft below the engine,
An intake port for outside air for cooling the V-belt type continuously variable transmission is provided in the curved portion of the vehicle body cover, and the outside air intake port and the outside air introduction port are connected by a connection pipe that can be bent and expanded and contracted. Since the pipe is disposed above the pivot shaft and below the article storage portion, and furthermore, at a height overlapping with the engine in a side view of the vehicle, clean outside air can be introduced into the V-belt chamber in the conduction case. The space around the engine can be used effectively.

Further, since the outside air intake port is provided in the body cover above the joint between the down tube of the body frame and the rear frame, clean outside air can be more efficiently introduced into the V-belt chamber in the conduction case. become.

[0016]

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 having a down tube 3, a front end fixed to the down tube 3, and a pair of right and left sides 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. The power unit 7 integrally or integrally includes an engine 8 and a transmission case 9 extending rearward from one side of the engine 8. Further, the pivot shaft 5 is disposed below the engine 8 as clearly shown in FIG.

At the rear end of the transmission case 9, a rear wheel 10 as 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 formed integrally with the left and right sides 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. further,
The vehicle body cover 14 in front of the driving seat 23 is bent downward from the driving seat 23 to form a curved portion 14a.

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, as shown in FIG.
Of the down tube 3 of the body frame 2
An outside air intake port 25 is formed above a joint between the rear frame 4 and the rear frame 4 (see FIG. 1), that is, at a lower portion of the maintenance lid 17 and near a boundary portion with the extension portion 18. This outside air intake port 25 is formed in a concave shape as shown in FIG.
The 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.
Then, the bottom portion 25b of the right outside air intake port in FIG. 4 of the rib 26 is closed as shown in FIG. 6C.

An intake chamber 27 is mounted on the back side of the outside air intake port 25 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.

Rib 2 formed on the back of 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.

As shown clearly in FIG. 1, the connection pipe 33 is provided in a space above the pivot shaft 5 and below the article storage section 24 at a height overlapping the engine 8 in a side view of the vehicle. The discharge chamber in the intake chamber 27 and the V-belt chamber 12 in the conduction case 9 communicate with each other. 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 this embodiment will be described.

In the present invention, the outside air intake port 25 is connected to the curved portion 14a of the vehicle body cover 14 above the joint between the down tube 3 and the rear frame 4 of the vehicle body frame 2, that is, at the lower portion of the maintenance lid 17, Formed near the boundary with the V-belt chamber 12, there is no need to dispose an air cleaner for cooling air, and the number of parts and weight can be reduced. And so on, and the outside air can be efficiently introduced by the traveling wind pressure.

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 pivot shaft 5 is disposed below the engine 8, and a connecting pipe 33 for communicating the outside air discharge chamber 27 b in the intake chamber 27 with the V-belt chamber 12 in the transmission case 9 is connected to the pivot shaft 5. The space around the engine 8 is provided in a space above and below the article storage unit 24 at a height overlapping with the engine 8 in a side view of the vehicle, and furthermore, formed in a bellows shape with a material that can be bent and stretched, such as rubber. Can be effectively used, and it is not necessary to remove the connection pipe 33 when the maintenance lid 17 is removed, so that the maintainability of the engine 8 can be improved. In addition, as described above, the power unit 7 swings up and down, and the relative position between the outside air inlet 13 of the conduction case 9 and the outside air outlet 32 of the intake chamber 27 constantly changes. , Fluctuations in the relative position are absorbed.

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, a connecting pipe is connected to an air cleaner for engine intake, and clean outside air is introduced into the air cleaner. You may.

[0039]

As described above, according to the scooter type vehicle of the present invention, the engine and the transmission case extending rearward from one side of the engine and holding the rear wheel at the rear end are integrally formed. A power unit configured to swing freely on a pivot shaft erected at a lower center of a body frame including a down tube and a rear frame and elastically supported via a rear suspension, and the conductive case is provided. 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 therein, and an outside air inlet for introducing outside air into the V-belt chamber is formed on the front side of the transmission case. While the V-belt type continuously variable transmission is configured to be cooled, an article storage portion is provided below the operation seat, and the entire vehicle body is covered with a vehicle body cover. In a scooter type vehicle in which a vehicle body cover in front of the transfer seat is bent downward from the operation seat to form a curved portion, the pivot shaft is disposed below the engine, and the V-belt type continuously variable transmission is cooled. The outside air intake port to be provided is provided in the curved portion of the vehicle body cover, and the outside air intake port and the outside air introduction port are connected by a bendable and expandable connection pipe, and the connection pipe is provided above the pivot shaft and the article. Under the storage section, furthermore, since it was arranged at a height that overlaps with the engine in a side view of the vehicle,
The clean outside air can be introduced into the V-belt chamber in the conduction case, and the space around the engine can be used effectively.

Further, since the outside air intake port is provided in the body cover above the joint between the down tube of the body frame and the rear frame, clean outside air can be efficiently introduced into the V-belt chamber in the conduction case. become.

[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 the line DD in FIG.

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Scooter type vehicle 2 Body frame 3 Down tube 4 Rear frame 5 Pivot shaft 7 Power unit 8 Engine 9 Conduction case 11 Rear suspension 12 V-belt room 13 Outside air inlet of conduction case 14 Body cover 14a Curved portion 15 Rear leg shield (body cover) 16) Opening of the rear leg shield 17 Maintenance lid 18 Extension of the maintenance lid 24 Article storage part 25 Outside air intake port 26 Rib on the back of the outside air intake port (means for blocking foreign matter in the outside air) 27 Intake chamber 30 Rib in the intake chamber (Means for blocking foreign matter in the outside air) 31 Foreign matter blocking plate (Means for blocking foreign matter in the outside air) 33 Connecting pipe

Claims (2)

[Claims] 1. A power unit integrally comprising an engine and a transmission case extending rearward from one side of the engine and holding a rear wheel at a rear end thereof, comprising a down tube and a rear frame. Swingably mounted on a pivot shaft provided at the lower center of the body frame, and elastically supported via a rear suspension,
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 for introducing outside air into the V-belt chamber at the front side of the transmission case. The V-belt type continuously variable transmission is configured so as to cool the V-belt type continuously variable transmission. On the other hand, an article storage portion is provided below the operation seat, the entire vehicle body is covered with the vehicle body cover, and the vehicle body cover in front of the operation seat is attached to the vehicle body cover. In a scooter type vehicle in which a curved portion is formed by curving downward from an operation seat, the pivot shaft is arranged below the engine, and the intake port of outside air for cooling the V-belt type continuously variable transmission is connected to the vehicle body. The connecting portion is provided on the curved portion of the cover, and the outside air intake port and the outside air introducing port are connected to each other by a bending / contractible connecting pipe, and this connecting pipe is provided above the pivot shaft and the article. In paid portion downward, further scooter type vehicle, characterized in that disposed at a height that overlaps with the engine in a side view of the vehicle. 2. The scooter-type vehicle according to claim 1, wherein the outside air intake port is provided in the vehicle body cover above a joint between a down tube of the vehicle body frame and a rear frame.