JPH05185976A - Scooter type vehicle - Google Patents

Abstract

PURPOSE:To improve cooling characteristic of a radiator, and to achieve comfortable driving in the summer time by providing the radiator on a leg shield, by providing exhaust ports opening backward, on both right and left sides of a foot rest, and by providing a cool air passage communicated from the lower part in the leg shield to the exhaust port, for guiding the cool air passes the radiator. CONSTITUTION:A pair of right and left exhaust ports 54, 54 directed backward are opened on right and left sides of upper and lower covers 57, 58, or right and left sides of a foot rest A. A radiator 60 is fixed to a frame 10 so that it is situated in front of a steering shaft cylinder 12 on the lower part in a leg shield 48. An air intake port 62 is formed in front of the radiator 60 on the leg shield 48, while an electric motor fan 63 is mounted on the rear surface of the radiator 60. The hot air that passes the radiator 60 goes from within a duct 64 to the inside of the foot rest A through a cool air passage B reaching a space surrounded by a foot rest frame 16 and the upper and lower covers 57, 58. Most part of the hot air is discharged from the exhaust port 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-wheeled or three-wheeled scooter type vehicle having a footrest provided below a steering handlebar and a driver's seat so that a driver can sit with both feet aligned.

[0002]

2. Description of the Related Art There is a scooter type vehicle in which a footrest is provided below a steering handlebar and a driving seat, and a unit swing type power unit is arranged below the driving seat.

In this type of vehicle, there is a footrest in front of the engine, and normally the power unit and the rear wheels are covered with a rear fender, so that the engine is not easily hit by the running wind. Therefore, it is considered that the engine is liquid-cooled and the radiator is housed in the leg shield (for example, JP-A-58-12894).

[0004]

[Problems of the prior art] In this prior art, an air intake for taking in traveling air is opened on the front surface of the leg shield, and an exhaust port for exhausting traveling air after passing through the radiator is provided on the rear surface of the leg shield. Was provided.

However, since the legs of the driver are positioned close to each other behind the leg shield, there is a problem that the exhaust from the exhaust port is not smoothly performed and the cooling performance of the radiator is deteriorated. In addition, the cooling air heated by passing through the radiator is discharged from the exhaust port toward the driver's feet and body, which causes a problem that driving in summer becomes uncomfortable.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is possible to improve the cooling performance of a radiator by smoothing the flow of cooling air passing through the radiator housed in the leg shield. An object of the present invention is to provide a scooter type vehicle which can make the running of the vehicle comfortable in the summer by preventing the cooling air heated by the vehicle from hitting the body of the driver.

[0007]

According to the present invention, the object is to provide a footrest located between a steering handlebar held by a steering shaft tube and a driver's seat, a liquid-cooled engine and a rear wheel. In a scooter type vehicle including a unit swing type power unit capable of swinging up and down and a leg shield standing up from the front portion of the footrest so as to wrap around the steering shaft cylinder, an engine cooling housed in the leg shield Radiator, an air inlet for guiding cooling air from the front surface of the leg shield to the radiator, an exhaust port provided on the left and right side surfaces of the footrest and directed rearward, and from a lower portion inside the leg shield. It is achieved by a scooter type vehicle characterized by comprising a cooling air passage communicating with the exhaust port and passing cooling air passing through the radiator to the exhaust port.

[0008]

Since the traveling wind always flows rearward on the side surface of the footrest, a negative pressure is always applied to the exhaust port which opens rearward on this side surface. Since the rear surface of the radiator communicates with the exhaust port through the cooling air passage, the radiator cooling air is smoothly discharged to the outside due to the negative pressure of the exhaust port.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a side view with a partial cross section, and FIGS.
-III-VI-VI line sectional view, FIG. 7 is a front view of the frame,
FIG. 8 is a perspective view of the duct, and FIG. 9 is a plan view showing the flow of traveling wind. Is.

In these figures, reference numeral 10 is a frame,
Steering shaft cylinder 12, descending pipe 14 having a square cross section extending obliquely downward and rearward from steering shaft cylinder 12, footrest frame 16 extending rearward from this descender pipe 14, and footrest frame 1
6 has a pair of left and right back stays 18 extending obliquely upward from the rear end of the back end 6. The footrest frame 16 is formed by stacking the upper plate 16a and the lower plate 16b in the middle, and the central portion of the upper plate 16a is raised in the front-rear direction to form a tunnel 20 therein. The front part of the lower plate 16b is a downcomer pipe 1.
4, a front opening 22 is formed so as to stand obliquely along the lower surface of the No. 4 and the front surface 22 is directed forward. The rear opening 24 of the tunnel 20 is directed toward the engine 26a described later.

Reference numeral 26 is a power unit. The power unit 26 includes a liquid-cooled engine 26a and the engine 26.
It has a transmission case 27 extending rearward from a and a rear wheel 28 attached to the rear portion of the transmission case 27. The power unit 26 is swingably held by a shaft 30 to form a known unit swing type rear wheel suspension device. 32 is a cushion unit.

A steering shaft 34 is rotatably supported by the steering shaft cylinder 12, and a steering handlebar 36 is attached to the upper end of the shaft 34. A windshield 38 is fixed to the handlebar 36, and a headlight, a speedometer, etc. are accommodated in the windshield 38. The fork bracket 4 is attached to the lower end of the steering shaft 34.
A pair of left and right forks 42 (42a, 42b)
Is installed. The fork 42 is of a known telescopic oleo type and has a coil spring and a damper inside. A front wheel 44 is attached to the lower end of the fork 42. Reference numeral 46 is a front fender attached to the fork 42 so as to move up and down together with the front wheel 44.

Reference numeral 48 is a leg shield that is formed so as to rise from the front of the footrest frame 16 and wrap around the steering shaft tube 12 from the front and rear, and comprises a front plate 48a and a rear plate 48b. Reference numeral 50 denotes a second front fender, which is attached to the frame 10 so as to be positioned above the front fender 46 with an appropriate interval. An air intake 52 located behind the front wheel 44 is formed in the lower portion of the fender 50.

The air intake 52 is slightly larger than the front opening 22 of the tunnel 20. Further, the front fender 46 is integrally formed with a deflector 56 which is directed toward the lower edge of the air intake 52 and the front opening 22 and extends in a tongue shape.

Reference numerals 57 and 58 are an upper cover and a lower cover for covering the footrest frame 16 from above and below.
The footrest A is formed by the footrests 7, 58 and the footrest frame 16. The left and right side surfaces of the footrest A, that is, the upper and lower covers 5
A pair of left and right exhaust ports 54, 54 are formed on the left and right side surfaces of 7, 58 so as to be directed rearward.

Reference numeral 60 denotes a radiator, which is a leg shield 4
It is fixed to the frame 10 via a bracket (not shown) so as to be positioned in the lower part of the steering shaft cylinder 8 in front of the steering shaft cylinder 12. An air intake 62 is formed in the leg shield 48 in front of the radiator 60. An electric fan 63 is attached to the rear surface of the radiator 60.

64 is a frame 10 at the rear of the radiator 60.
The duct 64 is mounted so as to straddle the lower part and the front part is formed in a substantially box-like shape with the lower part and the front part opened. As a result, the front opening of the duct 64 surrounds the fan 63 and faces the rear surface of the radiator 60.

The lower opening of the duct 64 is closed by the second fender 50 about two-thirds in front of it, and then about one-third of it is extended in the left-right direction of the footrest frame 16 so that the upper plate 16a extends. Open upward (Figs. 2 and 3). The rear lower portion of the duct 64 communicates with the space 84 formed between the footrest frame 16 and the upper and lower covers 57, 58 from the outer side of the upper plate 16a.

As a result, a cooling air passage B communicating with the space 84 between the footrest frame 16 and the upper and lower covers 57, 58 is formed from within the duct 64. Top / bottom cover 5
Exhaust ports 54, 5 directed rearward on the left and right side surfaces of 7, 58.
Since 4 is open, part of the cooling air that has passed through the radiator 60 is exhausted from the exhaust ports 54, 54.

The footrest frame 16 and the upper and lower covers 57,
The space 84 between the space and the space 58 is the rear opening 2 of the tunnel 20.
4 is opened rearward so as to surround the left and right sides and the lower side of 4. Therefore, the rest of the cooling air that has passed through the radiator 60 passes through this space 84 and is discharged below the power unit 26.

The leg shield 4 above the duct 64
The inside 8 is a storage space 66. This storage space 6
A dish plate 68 for accommodating small items such as rain gear and tools, a reservoir tank for accommodating a cooling liquid, a battery, a relay, and switches are accommodated in the interior 6.

In FIG. 2, 70 is a driving seat, 72 is a rear fender that covers the power unit 26 and the rear wheels 28, 74 is an air purifying box disposed on the right side of the rear wheels 28 in the fender 72, and 76 is a vaporizer. Reference numeral 78 denotes an exhaust silencer disposed below the air cleaning box 74 on the right side of the rear wheel 28.

Next, the operation of this embodiment will be described. During traveling, the traveling wind is guided and flows to the lower surface of the front fender 50 in FIG. 2, and the deflector 56 of the front fender 46 guides this wind to the air intake port 52. Upper / lower cover 5 from the air intake 52
Most of the running wind that entered between 7 and 58 is tunnel 2
0 through the front opening 22 into tunnel 20
It flows through the rear fender 72 while passing through the rear opening 24 and hitting the engine 26a.

A part of the wind is discharged from the exhaust port 80 (FIGS. 1 and 2) provided on the rear side surface of the rear fender while cooling the inside of the rear fender 72. The remaining part of the wind passes laterally and below the engine 26a and is discharged from the lower part of the rear fender 72 while cooling the exhaust pipe. Front wheel 4
The dust and muddy water raised by the 4
Since it is repelled by the lower surface of the, it hardly enters the air intake 52.

The coolant for the engine 26a is supplied by the coolant pump 8
2 (FIG. 9) to the radiator 60. Radiator 6
0 is an air intake 6 provided in front of the leg shield 48.
The traveling wind that enters from 2 and the wind that is sent by the fan 63 hit and are cooled.

The warm air that has passed through the radiator 60 is duct 6
Footrest frame 16 and upper / lower covers 57, 58 from inside 4
It is guided into the footrest A through a cooling air passage B reaching a space 84 (see FIGS. 3, 4, and 5) surrounded by and. Most of this warm air is exhausted from the exhaust port 54, and the rest is exhausted from below the engine 26a. In particular, since a negative pressure is generated in the vicinity of the exhaust port 54 by the traveling wind passing therethrough, the warm air is efficiently exhausted.

Further, since the air intake 52 located in front of the front opening 22 of the tunnel 20 is slightly larger than the front opening 22, the traveling wind that has entered between the upper and lower covers 57 and 58 from the air intake 52 is the front opening. Not only does it enter the tunnel 20 from 22 but a part of it is the space 8 between the upper and lower covers 57, 58.
4 and hits the engine 26a and the exhaust pipe.

In this embodiment, part of the frame 10 is the footrest frame 16, and the space 84 between the footrest frame 16 and the upper and lower covers 57, 58 is part of the cooling air passage B. The air passage is to be understood as meaning an air passage formed in a portion where a driver puts his foot. Further, in this embodiment, the footrest frame 16 is attached to the upper / lower plate 1
Although 6a and 16b are superposed in the middle,
It may be formed of a single pipe.

In the present embodiment, the engine 26a is arranged substantially horizontally and oriented forward so as to approach the rear opening 24 of the tunnel 20. Therefore, the traveling wind passing through the tunnel 20 and the space 84 satisfactorily hits the cylinder head of the engine 26a, the exhaust pipe, and the like, and the engine cooling property is further improved. When the engine is arranged upright, it is preferable to install baffle plates at appropriate positions or to raise the position of the rear opening 24 so that the traveling wind exiting the tunnel 20 flows in the direction of the cylinder head.

Further, a cooling liquid pipe for connecting the engine 26a to the radiator 60 is provided in the tunnel 20 and the upper and lower covers 5.
If it is provided between 7 and 58, this pipe can be cooled by running wind, which is convenient.

[0031]

As described above, according to the present invention, the air intake (62) is provided in front of the radiator (60) housed in the leg shield (48), while the cooling air passing through the radiator (60) is The air is discharged from the lower part of the leg shield (48) through the cooling air passage (B) communicating with the exhaust port (54) which is open to the left and right side surfaces of the footrest (A). Since negative pressure is generated at the exhaust port during traveling, the cooling air passing through the radiator is smoothly discharged to the outside through the exhaust port, and the cooling performance of the radiator is improved. In addition, the cooling air that has passed through the radiator and has warmed up does not hit the driver's feet or body, which makes driving particularly comfortable in summer.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV in FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a front view of the frame.

FIG. 8 is a perspective view of the duct.

FIG. 9 is a diagram showing the flow of traveling wind.

[Explanation of symbols]

 26 Power Unit 26a Engine 28 Rear Wheel 44 Front Wheel 48 Leg Shield 54 Exhaust Port 62 Air Intake 70 Operating Seat A Footrest B Cooling Air Passage

Claims (1)

[Claims] 1. A unit swing type, which has a footrest placed below a steering handlebar held by a steering shaft cylinder and a driver's seat, and has a liquid-cooled engine and can swing up and down together with rear wheels. In a scooter type vehicle comprising a power unit of, and a leg shield standing up from the front part of the footrest so as to wrap around the steering shaft tube, a radiator for engine cooling housed in the leg shield, and the leg shield An air intake port that guides cooling air to the radiator from the front surface, an exhaust port that is provided on the left and right side surfaces of the footrest and that is directed rearward, and an opening that communicates with the exhaust port from the lower part of the leg shield to connect the radiator. A scooter type vehicle comprising: a cooling air passage for guiding the passing cooling air to the exhaust port.