JPH0357586Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a front body structure of a scooter type motorcycle, and particularly relates to a scooter type motorcycle ( This article relates to the ventilation structure of the cover material in vehicles (including motor tricycles).

[Prior art and problems to be solved] In scooter-type motorcycles, the engine is located under the seat in the rear body, and the front part of the body is covered with a cover member, so it is difficult to use a forced air-cooled engine. Although it is common, water-cooled engines have recently been adopted as scooter-type motorcycles have become more powerful. The scooter-type motorcycles described in JP-A-58-149873 and JP-A-59-48279 are examples equipped with a water-cooled engine, and are formed by a cover member (leg shield) at the front of the vehicle body. A radiator is housed inside the drawing room. That is, the cover member is formed of a front cover located in front of the head pipe and a rear cover standing up from the footrest and located behind the head pipe. is installed.

Conventionally proposed scooter-type motorcycles have a structure in which an opening (air intake) for supplying running air to the radiator is provided in the front cover, and hot air after heat exchange is discharged toward the bottom of the footrest. The reason for this is that the exhaust port with a switching valve installed at the bottom of the rear cover opens the cold air and directs the hot air to the passengers' feet, but the air flow in the passenger compartment is not horizontal. Since the air changes its direction significantly downward and moves against the natural convection phenomenon (heated air originally flows upward), it has the disadvantage that smooth ventilation is not always achieved.

Furthermore, the vehicle described in JP-A No. 56-17770 is not a scooter-type motorcycle, but a regular saddle-type motorcycle, and therefore the feet of the driver riding this motorcycle are affected by the radiator. The driver comes in contact with the heated air that comes out of the air outlet, and the hot air heats the feet, which causes the driver to feel extremely uncomfortable, especially in the summer.

[Means and effects for solving the problem]

The present invention relates to an improvement of a scooter-type motorcycle that overcomes these difficulties.
A rear cover whose left and right widths are approximately equal to that of the footrest; and a front surface which abuts along the left and right and side pieces of the rear cover, and whose center portion in the left and right width direction bulges forward to cover the head pipe. In a scooter-type motorcycle equipped with a front cover member consisting of a cover, the rear cover is formed with a storage recess whose center portion in the left and right width direction is recessed forward, and the storage recess and the storage recess are sealed so as to be openable and closable. An opening/closing lid constitutes a storage section, and an air intake port for the radiator located in the bulge of the front cover and located in front of the head pipe is formed in the front cover, and an air intake port is formed in the front cover and extends toward the outside of the footrest. It is characterized in that exhaust ports for discharging hot air from the radiator are formed on both left and right outer sides of the storage recess and in front of the opening/closing lid.

The front ventilation structure of the scooter-type motorcycle of the present invention includes a front cover whose center portion in the left and right width direction bulges forward to cover the head pipe, and a storage recess formed by the center portion in the left and right width direction recessed forward. A radiator is disposed in a compartment defined by a rear cover having a Since it is formed at a location located on both the left and right outer sides of the storage compartment recess and in front of the opening/closing lid, the traveling wind that enters the compartment from the air intake port passes through the radiator section and exchanges heat, The air gradually spreads from side to side without abruptly changing direction, and is discharged into the atmosphere from the air outlet without hitting the driver, thereby avoiding driver discomfort, especially the feeling of heat in the summer, and allowing comfortable driving. can.

Furthermore, in the present invention, the air that enters through the air intake into the compartment defined by the front cover and the rear cover is heated and rises as a result of heat exchange with the radiator, and this heat Since the air is smoothly discharged outside the compartment from the exhaust port without going against the convection, the ventilation inside the compartment is good, heat radiation from the radiator is promoted, the thermal stability of the engine is maintained, and its displacement is increased. , high output becomes possible.

Furthermore, in the present invention, within the compartment defined by the front cover and the rear cover, the space on the side of the storage recess of the rear cover can be effectively used as a wind guide, and the space on the left and right sides of the rear cover Since the central part in the width direction can be effectively used as a storage space, it is possible to simultaneously increase the cooling performance of the radiator and improve the ability to store items without increasing the size of the front part of the vehicle body.

〔Example〕

Hereinafter, an embodiment of the present invention illustrated in FIGS. 1 to 8 will be described.

FIG. 1 shows a scooter-type motorcycle (hereinafter simply referred to as a motorcycle) 10 as a left side elevational view of the vehicle body, in which a water-cooled engine 12 is located at the rear of the vehicle body and is covered with a rear cover 16. The rear wheel RW is attached to the output shaft of a unit swing type power unit that integrates the engine and power transmission device. The low-floor footrest located between the front wheel FW and the rear wheel RW has a raised central portion 20 in the left and right width direction, and the left and right sides of the central portion 20 are formed as footrest surfaces 22.

In addition, a front cover member 2 disposed at the front of the vehicle body
4 is a front wheel connected to the front end of the footrest plate 18;
A rear cover 26 that stands up behind the FW and head pipe 14, an upper front cover 36 whose central portions in the left and right width directions bulge forward and are located in front of the head pipe 14, and a lower end of the upper front cover 36. , a lower front cover 40 connected to the left and right sides of the rear cover 26 and the front end of the footrest 18;
(See Figures 1 to 4).

Each of the covers 26, 36, 40 is fixed to the vehicle body frame including the head pipe 14, and the rear cover 26 and the upper front cover 36, which have approximately the same left and right width as the footrest 18, are located on the left and right sides thereof. 5, 6, and 7.However,
Figures 5 and 6 are - in Figure 1, respectively.
7 is an enlarged view of the main part of FIG. 6). And each cover 26, 36, 40
work together to form a compartment 42, within which a radiator 46 is housed. The radiator 46 is supported by the head pipe 14 via a stay 48. Further, an air intake port (louver) 38 for guiding the running wind to the radiator 46 is provided in the bulge of the upper front cover 36, and at the height level of the radiator 46, the left side of the rear cover 26,
There is an exhaust port 2 on the right side for discharging hot air in the compartment 42.
8 is formed, and a louver 30 for guiding the exhaust air to the outside of the footrest plate 18 is attached to the upper front cover 36 together with the rear cover 26 with screws 44 at the position of the exhaust port 28. (See Figures 5 and 8. However, Figure 8 is -
(It is a line cross-sectional view).

Further, a storage recess that is recessed forward is formed in the center portion of the rear cover 26 in the left-right width direction, and the opening/closing lid 32 and the storage recess of the rear cover 26 define a storage portion 34 .

According to this configuration, the running wind A enters the compartment 42 from the air intake port 38 and flows into the radiator 46.
The air passes between the heat dissipation fins, spreads gently to both sides without heading downward, passes through the air outlet 28, and is emitted outward from the footrest plate 18 by the action of the deflection plate 31 of the louver 30. In this way, the air flow within the compartment 42 does not go against the upward movement of the hot air, but instead changes direction gently and spreads to the left and right, so the air resistance within the compartment 42 is small.
Ventilation is extremely good. Therefore, heat dissipation from the radiator 46 is promoted, and it is possible to cope with larger engine displacement and higher output.

In addition, since the hot air discharged from the air outlet 28 flows outward from the footrest plate 18, it does not cause discomfort to the occupants even in the summer, and comfortable driving is always guaranteed.

In addition, while the engine is running and the vehicle is stopped, hot air generated from the back of the radiator 46 that is tilted forward becomes an upward flow, reaches the upper part of the compartment 42, passes through the exhaust port 28 and the louver 30, and flows upward. released to the outside. Along with this, the air intake port 38
Outside air is introduced into the compartment 42 through the radiator 46 and other gaps, and the heat from the radiator 46 is effectively radiated. Of course, if a forced cooling fan 50 is disposed between the radiator 46 and the head pipe 14 as shown by the two-dot chain line in FIGS. 1, 5, and 6,
Furthermore, heat dissipation is promoted.

[Brief explanation of drawings]

Fig. 1 is a left side elevational view of a scooter-type motorcycle adopting a front ventilation structure according to an embodiment of the present invention, and Figs. 2, 3, and 4 are a plan view and a front view of the vehicle body, respectively. Part front view, rear view of vehicle body, 5th
Figure 6 is the - line in Figure 1, respectively.
- Line sectional view, Figure 7 is an enlarged view of the main part of Figure 6,
FIG. 8 is a sectional view taken along the - line in FIG. 1. 10... Scooter type motorcycle, 12... Engine, 14... Head pipe, 16... Rear cover, 18... Foot rest plate, 20... Center part, 22
...Footrest surface, 24...Front cover member, 26...
... Rear cover, 28 ... Exhaust port, 30 ... Louver, 32 ... Opening/closing lid, 34 ... Storage compartment, 36 ...
...Upper front cover, 38...Air intake port, 40...
... lower front cover, 42 ... drawing chamber, 44 ... screw, 46 ... radiator, 48 ... stay.

Claims (1)

[Scope of Claim for Utility Model Registration] A rear cover that stands upright from the front end of a low-floor footrest located between the front and rear wheels and has approximately the same left and right width as the footrest; A scooter-type motorcycle comprising a front cover member that abuts along the left and right sides of the rear cover and bulges forward in the center portion in the left and right width direction to cover the head pipe; A storage recess is formed in the rear cover, and the storage recess is recessed forward in the center in the left and right width direction. An air intake port for the radiator located in front of the head pipe is formed in the front cover, and an air exhaust port for discharging hot air from the radiator toward the outside of the footrest is provided on both left and right outside of the storage recess. 1. A front ventilation structure for a scooter type motorcycle, characterized in that the structure is formed at a position forward of the opening/closing lid.