JPH07108970A - Scooter type vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a scooter type vehicle capable of introducing clean outside air into a V-belt chamber in a conductive case. [Structure] A swing type power unit 7 equipped with an engine 8 is provided in the lower center of a vehicle body frame 2. The power unit 7 is equipped with a conduction case 9 having a V-belt type automatic continuously variable transmission installed therein, and is located in front of the engine 8. The opening 1 for maintenance and inspection of the engine 8 etc. on the body cover 15
In the scooter type vehicle 1 having 6 and an openable / closable maintenance lid 17 for closing the opening 16, an outside air intake port 25 is formed in a concave shape in the lower portion of the maintenance lid 17, and a rear side of the outside air intake port 25 is formed. While the intake chamber 27 is provided, the intake chamber 27 and the V-belt chamber 12 in the conduction case 9 are connected by a connecting pipe 33.

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,
In particular, the present invention relates to a scooter type vehicle capable of introducing clean outside air into the V-belt chamber and improving the maintainability of the engine.

[0002]

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

However, the above-mentioned 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 contact portion between the drive pulley and the driven pulley and the V-belt, so that the V-belt chamber is inside. Temperature rises easily. In particular, in the case where the conductive case is made compact, the tendency becomes large, and there is a problem that the V belt is deteriorated earlier due to heat generation.

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

However, the outside air usually contains dust and water, and if this outside air is directly introduced into the V-belt chamber, it may damage each device in the V-belt chamber. An air cleaner for room cooling air is provided near the conduction case.

By the way, 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 this engine is opened and the opening is closed for maintenance and inspection of the engine and the like. Some have a maintenance lid that can be opened and closed.

[0007]

However, when the air cleaner for the V-belt chamber cooling air is provided in the vicinity of the conduction case, the dust, muddy water, etc., which the rear wheels wind up while traveling, are sucked into the V-belt chamber cooling air air cleaner. If the filter is clogged or the dust or muddy water that has passed through the filter is V
It may enter the belt chamber and damage each device in the V-belt chamber.

Further, since an air cleaner for intake of the engine is generally arranged near the conductive case, the space around this is narrow, and it is difficult to install the air cleaner for the V-belt chamber cooling air.

Further, the installation of the air cleaner for the V-belt chamber cooling air 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 opening for maintenance / inspection is located higher than the engine, and it has not been particularly easy to perform maintenance / inspection on the lower surface of the engine.

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

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

[0013]

In order to solve the above-mentioned problems, a scooter type vehicle according to the present invention has a swing type power unit having an engine at the lower center of a body frame as described in claim 1. This power unit is equipped with a conductive case that incorporates a V-belt type automatic continuously variable transmission, while an opening for maintenance and inspection of the engine, etc. is provided on the vehicle body cover located in front of the engine, and the opening and closing can be freely opened and closed to close this opening. In a scooter type vehicle having a maintenance lid of, an outside air intake port is formed in a concave shape in the lower portion of the maintenance lid, and an intake chamber is provided on the back side of the outside air intake port. The V-belt chamber is connected by a connecting pipe.

Further, in order to solve the above-mentioned problems, as described in claim 2, a means for blocking foreign matter in the outside air is provided between the rear surface of the outside air intake port and the intake chamber.

Further, in order to solve the above-mentioned problems,
According to a third aspect of the present invention, the connecting pipe is formed of a material that can be curved and stretched.

Further, in order to solve the above-mentioned problems, as described in claim 4, the lower end portion of the maintenance lid is extended substantially forward to form an extension portion, and the extension portion is a step floor. It is a part of.

[0017]

According to the present invention having the above-described structure, a swing type power unit having an engine is provided in the lower center of the vehicle body frame, and the power unit is provided with a conduction case in which a V-belt type automatic continuously variable transmission is installed. In a scooter type vehicle that has an opening for maintenance and inspection of the engine and the like and a maintenance lid that can be opened and closed to close the opening in the body cover located in front of the vehicle, the outside air intake port is concave at the bottom of the maintenance lid. An intake chamber is formed behind the outside air intake port, while the intake chamber and the V-belt chamber inside the conduction case are connected by a connecting pipe, so that clean outside air is introduced into the V-belt chamber inside the conduction case. Can be introduced.

Further, since a means for shutting off foreign matter in the outside air is provided between the rear surface of the outside air intake port and the inside of the intake chamber, it is possible to introduce even cleaner outside air into the V-belt chamber.

Further, since the connecting pipe is formed of a material which can be bent and expanded and contracted, the engine can be maintained and inspected without removing the connecting pipe from the outside air intake port, and the maintainability of the engine is improved.

The lower end of the maintenance lid is extended substantially forward to form an extension, and the extension forms a part of the step floor.
The opening for inspection is widened, which facilitates maintenance and inspection of the engine and improves the maintainability of the engine.

[0021]

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 and a pair of left and right extending forward and rearward with its front end fixed. And a rear frame 4 of.

A pivot shaft 5 extending in the vehicle width direction is provided under the center 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 conductive case 9 extending rearward from one side of the engine 8, and a rear wheel 10 as a drive wheel is held at a rear end of the conductive case 9. It The conductive case 9 also functions as a swing arm, and is elastically supported by the rear frame 4 by the rear suspension 11. Further, a V-belt chamber 12 is provided inside the conduction case 9, and a V-belt type continuously variable transmission (not shown) is arranged therein. An outside air introduction port 13 for introducing outside air into the V-belt chamber 12 is formed on the front side of the conduction case 9.

A rear leg shield 15 which constitutes a part of the vehicle body cover 14 is provided above the vicinity of the joint between the down tube 3 and the rear frame 4. As shown in FIG.
This rear leg shield 15 is equipped with
An opening 16 for inspection is formed, and this opening 16 is closed by a maintenance lid 17 that can be opened and closed. Also,
As shown in FIG. 3, the lower end portion of the maintenance lid 17 is extended substantially forward to form an extension portion 18.
8 constitutes a part of the step floor 19. Further, a 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.

As shown in FIG. 1, an upper frame cover 21 that is a part of the vehicle body cover 14 and is integrally formed on the left and right sides is provided around the rear frame 4 so as to surround the upper portion of the rear frame 4. A lower side cover 22 is provided on the lower portion of the upper frame cover 21 so as to be divided into right and left. Also, the upper frame cover 2
In the upper part of 1, for example, a driving seat 23 that can be opened and closed forwardly
An article storage section 24 capable of storing a helmet or the like is provided immediately below the driving 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. 6A is a sectional view taken along the line AA of FIG.
6B is a sectional view taken along the line BB of FIG. 4, and FIG.
(C) is a sectional view taken along the line CC of FIG. 4.

As shown in these figures, an outside air intake port 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 portion 25a is opened. Further, as shown in FIG. 6B, a rib 26 is formed on the rear surface of the outside air intake port 25 on the right side in FIG. 4 as a means for blocking foreign matter in the outside air. And the rib 26
The outside air intake bottom portion 25b on the right side in FIG.
It is blocked as shown in (c).

An intake chamber 27 is attached to 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. Furthermore, FIG.
7A is a cross-sectional view taken along the line DD of FIG. 7A, and FIG. 9 is a cross-sectional view taken along the line EE of FIG. 8. In both FIG. 8 and FIG. The state attached to the back side of the outside air intake port 25 of is shown.

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

Ribs 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 portion corresponding to 6, which is a means for blocking foreign matter in the outside air. And
The ribs 26 and 30 are aligned with each other 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, the left side of the intake chamber 27 in FIG. 7A is the outside air introduction chamber 27a, and the right side 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 arranged below the outside air intake port 25.

The outside air discharge port 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 connecting pipe 33 formed in a bellows shape made of a material that can be bent and expanded, such as rubber, is connected to the outside air outlet 32. The other end of the connecting pipe 33 is connected to the outside air introduction port 13 formed on the front side of the conduction case 9. The connecting pipe 33 is connected to the intake chamber 2
The discharge chamber in 7 and the V-belt chamber 12 in the conduction case 9 are communicated with each other. A filter element such as a sponge (not shown) may be arranged in the outside air outlet 32.

As shown in FIG. 7A, a plurality of pin holes 28a are formed in the edge portion 28 of the intake chamber 27. In addition, 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 a portion corresponding to the pin hole 28a of the intake chamber edge portion 28. And FIG.
As shown in (a) and (b), in the intake chamber 27, the pin hole 28a is fitted into the mounting pin 34, and heat is applied to the tip of the mounting pin 34 to melt the maintenance lid 1.
It is fixed integrally to 7. Furthermore, maintenance lid 1
7 is a packing material 35 between the back surface and the edge 28 of the intake chamber 27.
Is intervened.

Next, the operation of this embodiment will be described.

In the present invention, since the outside air intake port 25 is formed in the lower portion of the maintenance lid 17 and in the vicinity of the boundary with the extension portion 18, it is not necessary to dispose the V-belt chamber 12 cooling air air cleaner, and the number of parts and While the weight can be reduced, there is also no fear that the dust, muddy water, etc., which will be wound up by the rotation of the rear wheel 10 during traveling will be inhaled.

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

Further, since the foreign matter blocking plate 31 which is means for blocking foreign matter in the outside air is provided in the intake chamber 27,
As shown by the arrows in FIGS. 8 and 9, sand dust and water in the outside air introduced from the outside air intake port 25 into the outside air introduction chamber 27a are blocked by the foreign matter blocking plate 31, and only clean air passes through the communication passage 27c. It is guided to the outside air discharge chamber 27b, and is led from the outside air discharge port 32 to the V-belt chamber 12 in the conduction case 9 through the connecting pipe 33. As a result, there is no possibility of damaging each device in the V-belt chamber 12. 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 portion of the maintenance lid 17 is extended substantially forward to form the extension portion 18, and the extension portion 18 constitutes a part of the step floor 19,
The opening 16 for maintenance and inspection of the engine 8 and the like formed in the rear leg shield 15 becomes large, and maintenance and inspection of the lower surface of the engine 8 which has been difficult to reach in the past becomes easy. Since the floor mat 20 is installed on the step floor 19 part of the rear leg shield 15 and the extension part 18 of the maintenance lid 17, the mating surface between the step floor 19 part and the extension part 18 is hidden and the appearance is improved. There is no loss.

The outside air discharge chamber 27b in the intake chamber 27
Since the connection pipe 33 that connects the V-belt chamber 12 in the conduction case 9 to each other is formed into a bellows shape with a flexible / flexible material such as rubber, it is necessary to remove the connection 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
Although the relative position between the air conditioner 3 and the outside air outlet 32 of the intake chamber 27 constantly fluctuates, the fluctuation of the relative position is absorbed because the connecting pipe 33 is bendable.

In the present invention, the outside air is introduced into the V-belt chamber to cool the heat generating portion, but the connecting pipe is connected to the engine air intake cleaner to introduce clean outside air into the air cleaner. May be.

[0042]

As described above, according to the scooter type vehicle according to the present invention, the swing type power unit equipped with the engine is provided in the lower center of the body frame, and the power unit has the V-belt type automatic continuously variable transmission incorporated therein. In the scooter type vehicle, the vehicle body cover located in front of the engine has an opening for maintenance / inspection of the engine and the like and an openable / closable maintenance lid for closing the opening. An outside air intake port is formed in a concave shape in the lower part, and an intake chamber is provided on the back side of the outside air intake port, while this intake chamber and the V-belt chamber in the conduction case are connected by a connecting pipe, so that the outside air is clean. Can be introduced into the V-belt chamber in the conductive case.

Further, since a means for shutting off foreign matter in the outside air is provided between the rear surface of the outside air intake port and the inside of the intake chamber, it is possible to introduce even cleaner outside air into the V-belt chamber.

Further, since the connecting pipe is formed of a material which can be bent and expanded and contracted, the engine can be maintained and inspected without removing the connecting pipe from the outside air intake port, and the maintainability of the engine is improved.

The lower end of the maintenance lid is extended substantially forward to form an extension, and the extension forms a part of the step floor.
The opening for inspection is widened, which facilitates maintenance and inspection of the engine and improves the maintainability of the engine.

[Brief description of drawings]

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

FIG. 2 is a view 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.

5 is a cross-sectional view taken along line XX of FIG.

6A is a sectional view taken along the line AA of FIG. 4, FIG.
Is a cross-sectional view taken along the line BB of FIG. 4, and (c) is a cross-sectional view taken along the line C-C of FIG. 4.

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 D-D of FIG.

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

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

[Explanation of symbols]

1 scooter type vehicle 2 vehicle body frame 7 power unit 8 engine 9 conduction case 12 V-belt chamber 13 outside air inlet of conduction case 15 rear leg shield (vehicle body cover) 16 rear leg shield opening 17 maintenance lid 18 maintenance lid extension 25 Outside air intake port 26 Ribs on the back side of outside air intake port (means for blocking foreign substances in the outside air) 27 Intake chamber 30 Ribs inside intake chamber (means for blocking foreign substances in the outside air) 31 Foreign substance blocking plate (blocking foreign substances in the outside air) Means) 33 Connection pipe

Claims (4)

[Claims] 1. A swing type power unit equipped with an engine is provided in the lower center of a body frame, and this power unit is equipped with a conduction case having a V-belt type automatic continuously variable transmission installed therein, and a body cover located in front of the engine. In a scooter type vehicle having an opening for maintenance / inspection of an engine and the like and an openable / closable maintenance lid for closing the opening, an outside air intake port is formed in a concave shape at a lower portion of the maintenance lid, and the outside air intake port is formed. The scooter type vehicle is characterized in that an intake chamber is provided on the back side of the vehicle and the intake chamber and the V-belt chamber in the conductive case are connected by a connecting pipe. 2. The scooter type vehicle according to claim 1, wherein means for blocking foreign matter in the outside air is provided between the rear surface of the outside air intake port and the inside of the intake chamber. 3. The scooter type vehicle according to claim 1 or 2, wherein the connecting pipe is formed of a material which can be bent and expanded and contracted. 4. A scooter type vehicle characterized in that a lower end portion of the maintenance lid is extended substantially forward to form an extension portion, and the extension portion constitutes a part of a step floor.