JPH08127377A - Radiator arranging structure for scooter type vehicle - Google Patents

Abstract

PURPOSE: To positively cool a radiator, arranged in the lower part of a step floor, by running air blown from the forward and further to form a cooling fan so that it can be effectively utilized. CONSTITUTION: A radiator 25 of heat exchanging cooling water of an engine is arranged in the lower part of a step floor 24, to provide an air guide means (duct 39) of placing a ventilating direction A of this radiator 25 in parallel to a longitudinal direction of a scooter type vehicle 1 also to guide to the radiator 25 running air blown from the forward according to running the scooter type vehicle 1. A numeral 40 is a cooling fan.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator arrangement structure for a scooter type vehicle in which a water-cooled engine is mounted and a radiator for heat exchange of cooling water of the engine is provided in a vehicle body.

[0002]

2. Description of the Related Art In the case of a scooter type vehicle, it is difficult to allow the engine to cool naturally due to the fact that the engine is arranged at the rear part of the vehicle body. For this reason, there are many scooter type vehicles in which the engine is water-cooled to improve the cooling efficiency.

When the engine is a water-cooled type, a radiator for exchanging heat of the cooling water needs to be arranged somewhere in the vehicle body, but the inside of the vehicle body of a small scooter type vehicle is very narrow, and the radiator can be arranged. There is almost no space.

Therefore, a scooter type vehicle has been devised in which the radiator is horizontally arranged at the lower part of the step floor provided between the handlebar for steering the front wheels and the seat for seating the passenger's feet ( See Japanese Utility Model Publication No. 62-38471).

[0005]

However, when the radiator is horizontally arranged in the lower part of the step floor as described above, the traveling wind blown from the front with the traveling of the scooter type vehicle is perpendicular to the ventilation direction of the radiator. Therefore, the traveling wind cannot pass through the radiator, and the radiator cannot be cooled efficiently.

Further, even if a cooling fan is provided so that the radiator can be cooled even when the scooter type vehicle is stopped, the air flow generated by the cooling fan is obstructed by the step floor located directly above the radiator. The cooling fan cannot be used effectively.

The present invention has been made in order to solve such a problem, and positively cools a radiator arranged at the lower part of the step floor by traveling wind blown from the front, and further cools a cooling fan. An object of the present invention is to provide a radiator arrangement structure for a scooter type vehicle that can be effectively utilized.

[0008]

In order to achieve the above object, a radiator arrangement structure for a scooter type vehicle according to the present invention is equipped with a water-cooled engine and is provided between a handlebar for steering front wheels and a seat. In a scooter type vehicle equipped with a step floor for stepping on the foot that goes low in the lower part of the vehicle, a radiator for heat exchange of the cooling water of the engine is arranged at the lower part of the step floor, and the ventilation direction of the radiator is The wind guide means is provided so as to be parallel to the front-rear direction of the model vehicle and guide the traveling wind blown from the front to the radiator as the scooter type vehicle travels.

[0009]

As described above, if the ventilation direction of the radiator arranged at the lower part of the step floor is made parallel to the front-back direction of the scooter type vehicle, the traveling wind blown from the front can pass through the radiator and the wind guide Since the traveling wind is positively guided to the radiator by the means, the radiator is efficiently cooled.

Further, when the radiator is provided with a cooling fan, the airflow generated by the cooling fan can pass through the radiator without being obstructed by the step floor and other objects, and the cooling fan can be effectively utilized. .

[0011]

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

FIG. 1 is a left side view of a scooter type vehicle to which the present invention is applied. This scooter type vehicle 1 is provided with a general underbone type vehicle body frame 2, and this vehicle body frame 2 is provided with a head pipe 3 located in the forehead.
The main tube 4 extends downward from the rear side, and a frame body 6 made of steel plate is fixed to the upper portions of the pair of left and right side pipes 5 rising from the rear end of the main tube 4, and the pair of left and right rear pipes 7 is formed from the frame body 6. It has been extended.

A front fork 8 is supported on the head pipe 3 so as to be rotatable left and right. A front wheel 9 is pivotally supported on a lower end portion of the front fork 8, and an upper portion of the front fork 8 for steering front wheels. The handlebar 10 is fixed. On the other hand, a power unit 13 is vertically swingably connected to a pivot shaft 11 provided at the center of the lower portion of the vehicle body frame 2 via a link 12.

The power unit 13 comprises a water-cooled engine 14 and a power transmission device 15 which are integrated with each other. A rear wheel 16 is directly supported by a rear portion of the power unit 13. A shock absorber 17 is connected to the rear portion of the vehicle body frame 2 (frame body 6), and the shock absorber 17 suspends the power unit 13 and the rear wheel 16 from each other. The exhaust muffler 18 extending from the engine 14 extends rearward through the right side of the rear wheel 16.

A seat 21 is provided on the frame body 6 of the vehicle body frame 2 so as to be openable and closable, and an internal space of the frame body 6 serves as an article storage chamber 22 for storing a helmet or the like. By opening it, articles can be taken in and out of the article storage chamber 22.

The body of the scooter type vehicle 1 is entirely covered with a frame cover 23 made of synthetic resin to improve the appearance and protect the internal equipment. A step floor 24 is provided between the handlebar 10 and the seat 21 for stepping down into the lower bay, and the cooling water of the engine 14 is heat-exchanged under the step floor 24. A radiator 25 is arranged.

2 is an enlarged view of the II portion of FIG. 1, FIG. 3 is a plan view taken along the arrow III of FIG. 2, and FIG. 4 is a vertical sectional view taken along the line IV-IV of FIG. The step floor 24 is composed of a floor support frame 26 provided on a horizontal portion of the main tube 4 and a step board 27 placed on the floor support frame 26.

The floor support frame 26 is fixed to the bent portion of the main tube 4 and extends in the vehicle width direction, a pair of left and right rear beams 29 projecting laterally from the side pipe 5, and the front portion. The floor bracket 30 includes a pair of left and right floor brackets 30 that connect the tip portions of the beam 28 and the rear beam 29 to each other.
The step board 27 is fixed on the upper part by bolts or the like.

The radiator 25 has a general flat plate shape and is arranged, for example, on the left side of the main tube 4, so that the ventilation direction A of the radiator 25 is parallel to the front-back direction of the scooter type vehicle 1. The radiator in a side view
25 are upright, and the radiator 25 is provided so as to be parallel to the vehicle width direction in a plan view.

A fixed bracket 32 is fixed to the upper left side of the radiator 25, and a fixed bracket 33 is fixed to the right side of the radiator 25. Both fixing brackets
32 and 33 are fastened with bolts 36 and 37 to a fixed stay 34 fixed to the middle portion of the left floor bracket 30 and a fixed pedestal 35 fixed to the left side portion of the main tube 4, whereby the radiator 25 is fixed to the vehicle body. It is firmly fixed to the frame 2.

As shown in FIG. 4, the radiator 25 is covered by the frame cover 23 from the side and the bottom. Then, as shown in FIG. 2 and FIG.
A duct 39 extending in the front-rear direction is installed in the frame cover 23 that covers 25, the front end of the duct 39 is opened rearward of the front wheel 8 and the rear end of the duct 39 is connected to the radiator 25. It is slightly constricted toward you. The duct 39 serves as an air guide means for guiding the traveling wind blown from the front to the radiator 25 as the scooter type vehicle 1 travels.

Further, an electric cooling fan 40 is provided on the back surface (rear surface) of the radiator 25. The cooling fan 40 is automatically turned on and off in conjunction with the operation of a thermostat (not shown) provided in the radiator 25, and operates only when the water temperature in the radiator 25 exceeds a predetermined temperature. When the cooling fan 40 operates, the air in front of the radiator 25, that is, the air in the duct 39 is sucked in behind the radiator 25, and the radiator 25 is cooled. Therefore, the radiator 25 can be efficiently cooled even when the scooter type vehicle 1 is stopped.

A radiator cap 41 for replenishing cooling water is provided on the upper right side of the radiator 25. The radiator cap 41 is located in a recess 42 formed in the step board 27 as shown in FIG. The upper opening of the recess 42 is closed by the cap 43. On the other hand, since the battery 45 for the vehicle body power supply is arranged on the right side of the main tube 4, the battery box that houses this battery 45
A step board 46 is integrally formed on the right half side of the step board 27, and an upper opening thereof is closed by a cap 47.

In such a radiator arrangement structure, since the ventilation direction A of the radiator 25 is set parallel to the front-back direction of the scooter type vehicle 1, the traveling wind blown from the front when the scooter type vehicle 1 is traveling. Is a radiator
In addition to being able to pass through the radiator 25, the traveling wind is positively guided to the radiator 25 by the duct 39 which is a wind guide means, so that the radiator 25 is efficiently cooled.

Further, since the air flow generated by the cooling fan 40 provided in the radiator 25 can pass through the radiator 25 without being obstructed by the step floor 24 and other objects, the cooling fan 40 can be effectively used. it can.

As described above, since the radiator 25 can be positively cooled by the traveling wind and the cooling effect of the cooling fan 40 can be expected sufficiently, it is possible to greatly contribute to the downsizing of the radiator 25. .

In this embodiment, the radiator 25 is arranged only on the left side under the step floor 24, but the radiators 25 may be arranged on the left and right sides under the step floor 24. Further, the radiator 25 is not limited to the flat plate shape, but may be, for example, a curved shape.

By the way, the ventilation direction A of the radiator 25 is made parallel only to the front-back direction of the scooter type vehicle 1, and
Even if the cooling fan 39 or the cooling fan 40 is omitted, a high cooling effect can be expected.

[0029]

As described above, the radiator arrangement structure of the scooter type vehicle according to the present invention is equipped with a water-cooled engine and is lowered downward between the front wheel steering handle bar and the seat. In a scooter type vehicle equipped with a step floor for stepping on, a radiator for heat exchange of the cooling water of the engine is arranged at the lower part of the step floor, and the ventilation direction of the radiator is set to the front-back direction of the scooter type vehicle. And a wind guide means for guiding the traveling wind blown from the front to the radiator as the scooter type vehicle travels.

With this configuration, the traveling wind blown from the front when the scooter type vehicle is traveling can pass through the radiator, and the traveling wind is actively guided to the radiator, so that the radiator can be efficiently used. Well cooled.

Further, when the radiator is provided with a cooling fan, the airflow generated by the cooling fan can pass through the radiator without being obstructed by the step floor and other objects, and the cooling fan can be effectively utilized. .

[Brief description of drawings]

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

FIG. 2 is an enlarged view of a portion II of FIG. 1, showing an embodiment of the present invention.

FIG. 3 is a plan view taken along the arrow III in FIG.

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

[Explanation of symbols]

 1 Scooter type vehicle 2 Body frame 4 Main tube 9 Front wheel 10 Handlebar 14 Engine 16 Rear wheel 21 Seating seat 24 Step floor 25 Radiator 39 Duct 40 which is a baffle cooling fan

Claims (1)

[Claims] 1. A scooter-type vehicle equipped with a water-cooled engine, comprising a step floor for stepping on a foot that lowers downward between a handlebar for steering front wheels and a seating seat. A radiator that heat-exchanges the cooling water of the engine is placed in the lower part of the, and the ventilation direction of this radiator is parallel to the front-back direction of the scooter type vehicle, and the traveling wind blown from the front as the scooter type vehicle travels. A radiator arrangement structure for a scooter type vehicle, characterized in that an air guide means for guiding the vehicle to the radiator is provided.