JPH0353986Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a so-called scooter-type motorcycle in which the front part of the seat is low and wide and hollowed out to provide a floor.

BACKGROUND ART Conventionally, in such a scooter type motorcycle, a front cover surrounds a head pipe constituting a body frame to provide a leg shield function. In addition, some high-output sports vehicles are equipped with water-cooled engines, and in such vehicles, the radiator is housed within the front cover, creating an excellent layout in terms of weight balance between the front and rear of the vehicle. There is. In the scooter type motorcycle described in Japanese Patent Application Laid-Open No. 58-128924, the radiator is
In order to avoid the radiator from interfering with the front forks during steering operations, it is installed along and close to the head pipe, and as a result, the radiator is installed at a high position. Furthermore, Japanese Patent Application Laid-Open No. 54-51144 discloses a motorcycle in which a radiator is installed at the front end of a meter support stay whose base is fixed to a head pipe. It is located high, and is essentially the same as the scooter type motorcycle described in the above publication.

Problems to be Solved However, the radiator is a heavy object, and if it is placed as low as possible in the vehicle body, the center of gravity of the vehicle will be lowered, making it easier to move the vehicle around.

Therefore, the main object of the present invention is to lower the center of gravity of the vehicle by arranging the radiator as low as possible in the scooter-type motorcycle as described above.

Means and Effects for Solving the Problems Therefore, in the present invention, in a scooter-type motorcycle in which a front wheel is mounted on a head pipe via a front fork, and a radiator is mounted on the front part of the head pipe, the front wheel is mounted on a head pipe. The stay is extended to a position below the lower end of the head pipe in front of the front fork, and the radiator is mounted on the front part of the stay, so that the radiator is disposed at a position substantially directly above the front wheel. .

According to the present invention, the radiator is disposed almost directly above the front wheel as described above, that is, near a position close to the circumferential surface of the front wheel on a vertical line passing through the center of the front wheel. The installation position of the radiator has been lowered, improving the running and maneuverability of the vehicle. Also, this radiator is located outside the range where the Freud fork turns during steering operations, so it does not interfere with the front fork during steering operations. . Moreover, since the radiator is disposed protrudingly at the frontmost part of the vehicle body, when the vehicle is running, wind from the front can smoothly flow into the radiator without being obstructed by other objects, providing a good cooling effect.

Embodiments The present invention will be described below with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a side view showing an embodiment of the scooter type motorcycle of the present invention, and FIGS. 2 and 3 are a front view and a plan view thereof, respectively. Further, FIG. 4 shows the body frame structure of this scooter type motorcycle.

As shown in these drawings, especially FIG. 4, the body frame of this scooter type motorcycle includes a head pipe 1, the front end of which is integrally fixed to the head pipe 1 by welding or the like, and a body frame that extends downward from the head pipe 1 and extends downward from the head pipe 1. Main pipe 2 extending rearward,
The front lower end of the main pipe 2 is integrally fixed to the rear end of the main pipe 2 through a gusset by welding or the like, and includes a center pipe 3 extending upward from the main pipe 2 and extending upwardly to the rear. A front wheel 5 is rotatably supported at the lower end of the front fork 4.
is rotatably supported. A steering handle 7 is integrally attached to the upper end of a steering stem 6, which is the pivot axis of the front fork 4.

Further, a bottom plate 8 is integrally fixed to the front lower end of the center pipe 3 so as to face rearward, and the front part of the swing type power unit 9 is pivotably supported on the bottom plate 8 so as to be able to swing up and down. The rear part is pivotally supported at the upper rear part of the center pipe 3 via a shock absorber 10. This power unit 9 includes an engine 11 and a transmission case 12.
The rear wheel 13, which is pivotally supported at the rear of the transmission case 12, is connected to the engine 1.
It is designed to be rotationally driven by the power of 1.

The main body portion of the vehicle body constructed as described above is covered with various covers and has an appearance as shown in FIGS. 1 to 3. These covers can be roughly divided into a front cover 14 and a floor cover 15.
and a body cover 16, and a seat 17 is installed on the body cover 16.

The front cover 14 is provided so as to surround the head pipe 1 and the front downward portion of the main pipe 2 at the front of the vehicle body. , 2, and an upper cover 20 that covers the upper sides of both covers 18, 19.

The floor cover 15 is provided at a portion where the main pipe 2 extends horizontally from below to the rear, covering the main pipe 2 from above. It forms the floor on which it is placed. The body cover 16 is
A sheet 17 covers the center pipe 3 from above and is installed in the upper opening.

The present invention relates to a scooter type motorcycle equipped with a water-cooled engine.
1 is a water-cooled engine and is equipped with a radiator 21. The radiator 21 is shown in FIGS. 4 and 5.
As shown in the figure, it is housed in the front cover 18 of the front cover 14 facing forward, and is fixed to a stay 22 that is fixed to the head pipe 1 and extends forward from the pipe 1. FIG. 5 shows the engine cooling water circulation system. The cooling water is circulated by the water pump 23 in the pipe line 24 as shown by the arrow, cools the engine 11, and exchanges heat with the air in the radiator 21. engine 1
Release heat from 1. 25 is air bypass, 2
6 is a reserve tank. Reserve tank 26
is stored in a storage box 27 provided longitudinally in the center of the vehicle body width direction on the floor cover 15.

As can be clearly seen from FIG. 4, the stay 22 extends obliquely downward and forward from the head pipe 1 to a position in front of the front fork 4 and below the lower end of the head pipe 1. is fixed, so the radiator 21 is provided almost directly above the front wheel 5. That is, the radiator 21 occupies a position lower than the head pipe 1 in the vertical direction, and is located at a position substantially the same as the axle position of the front wheel 5 in the longitudinal direction and sufficiently spaced forward from the front fork 4. Therefore, the radiator 21 is installed at a low location, which lowers the center of gravity of the vehicle, improving the running performance and maneuverability of the vehicle, and the radiator 21 is located outside the range in which the front fork 4 turns during steering operation. Therefore, there is no interference with the front fork when steering. Furthermore, since the radiator 21 is arranged protrudingly at the frontmost part of the vehicle body, when the vehicle is running, wind from the front flows smoothly into the radiator 21 without being disturbed by other objects, providing a good cooling effect. .

FIG. 6 shows an exploded view of each cover constituting the front cover 14. As shown in FIG. The front cover 18 of the front cover 14 is composed of an upper portion 18 ₁ projecting forward like an eave, and left and right lower portions 18 ₂ extending downward from both side surfaces of the upper portion 18 ₁ at the rear thereof. The lower portion ₁₈₂ extends downward along both sides of the main pipe 2, and cooperates with the rear cover 19 to form a leg shield that shields the driver's feet from wind from the front. There is.

The upper part 18 ₁ has an upper surface, a lower surface and both side surfaces respectively as an upper plate 18 ₁₁ , a lower plate ₁₂ and a side plate 18 _{13 .}
The front, rear, and upper rear portions are open. In the space surrounded by the upper plate 18 ₁₁ , lower plate 18 ₁₂ and both side plates 18 ₁₃ , the radiator 21 supported on the head pipe 1 by the stay 22 is housed, as described above. As shown in FIG. 4, the radiator 21 projects forward from the head pipe 1 by means of a stay 22, and is disposed facing the open front surface of the upper portion ₁₈₁ of the front cover. A radiator grill 28 is provided. The radiator 21 and the radiator grille 28 are arranged at the center of the width of the vehicle body, and headlights 29, 29 are arranged on the left and right sides of the radiator grille 28, respectively.

In conventional scooter-type motorcycles, the headlight is placed on the center line of the vehicle body width, so when a radiator is provided as in this example, the headlamp must be placed above the radiator. However, it was unavoidable that the center of gravity of the vehicle would become higher.
In this embodiment, as described above, by arranging the headlights 29 on both the left and right sides of the radiator grille 28, it is possible to lower the center of gravity of the vehicle body while maintaining a good left and right weight balance. Driving and handling become easier. As shown in FIG. 6, the headlights 29 are attached to openings on both sides of the radiator grille 28, and the headlights 29 and the radiator grille 28 are assembled together and then attached to the front cover 18. In this way, ease of assembly is excellent, and gaps between the grille 28, the front cover 18, and the headlights 29 can be easily managed.

FIG. 7 shows another embodiment of the structure for attaching the headlight 29 to the front cover 18. 33 is a stay provided on the lower edge of the upper plate 18 ₁₁ , and a spring 35 is interposed between the stay 33 and a pair of mounting pieces 34 provided on the left and right sides of the upper part of the headlight 29. The upper part of the headlight 29 is supported by the bolt 36, and the headlight 2
One tapping screw 37 at the bottom center of 9
It is attached to the lower plate 18 ₁₂ of the front cover 18 by means of. Therefore, the light distribution of the headlight 29 can be adjusted vertically and horizontally by adjusting the two bolts 36.

Further, in this embodiment, as described above, the upper portion 18 ₁ of the front cover 18 of the front cover 14 protrudes forward like a canopy, and the radiator grill 28 is provided at the center of the front surface. The running wind is effectively guided to the radiator 21,
The heat radiation efficiency of the radiator 21 is improved. Further, at the rear of the side plate 18 ₁₃ of the upper portion 18 ₁ , there is a radiator 21 led from the radiator grill 28.
An outlet 30 for the cooling air that has passed through is provided, and is covered with a side cover 31 having an outlet that directs the cooling air diagonally backward. In this way, the cooling air discharged from the exhaust port 30 flows smoothly rearward along the side of the vehicle body, so it does not disturb the air flow around the vehicle body, and therefore does not affect the ride comfort of the driver. neither giveth nor stir up the dust of the earth;

A radiator head 32 is attached to the upper plate ₁₈₁₁ of the front cover 18 at a portion located above the radiator 21 with tightening screws, and by removing this radiator head 32, maintenance and inspection of the radiator 21 can be carried out. It is now possible to do this easily.

The rear open surface of the front cover 18 is covered by the rear cover 19, and a top cover 20 is provided above the rear cover 19 and over the above-mentioned open portion at the rear of the upper surface of the front cover 18. As described above, the front cover 18, the rear cover 19, and the top cover 20 constitute the front cover 14 that surrounds the head pipe 1. An inner tray 38 is provided across the head pipe 1 between the front cover 18 and the rear cover 19, and is used to store various items.
Note that the top cover 20 extends to the vicinity of the steering handle 7 and has a windscreen function. Further, a heater duct is provided at the upper part of the rear cover 19, so that warm air that has passed through the radiator can flow to the driver's feet as needed.

Effects of the Invention As described above, in the scooter type motorcycle of the present invention, the stay extends from the head pipe to a position below the lower end of the head pipe in front of the front fork, and the radiator is attached to the front part of the stay. As a result, the radiator is located almost directly above the front wheel, so the heavy radiator can be placed low on the vehicle body without interfering with the front forks, lowering the center of gravity of the vehicle and improving the vehicle's center of gravity. It is possible to improve running performance, maneuverability, etc. In addition, the wind from the vehicle is effectively guided to the radiator, improving the heat dissipation efficiency of the radiator.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention;
Figure 3 is a front view of the same, Figure 3 is a plan view of the same, Figure 4 is a side view showing the body frame structure, Figure 5 is a diagram showing the engine cooling water circulation system, Figure 6 is an exploded perspective view of the front cover. , FIG. 7 is a sectional view showing the mounting structure of the headlamp. 1... Head pipe, 4... Front fork, 5... Front wheel, 14... Front cover, 21... Radiator, 22... Stay,
28...Radiator grill, 29...Headlight.

Claims (1)

[Scope of utility model registration request] In a scooter type motorcycle in which a front wheel is mounted on a head pipe via a front fork, and a radiator is mounted on the front part of the head pipe, a stay is attached from the head pipe to the head pipe in front of the front fork at a position below the lower end. A scooter-type motorcycle, characterized in that the radiator is disposed almost directly above the front wheel by extending the radiator to the front part of the stay.