JP2533584Y2 - Power unit swing type vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power unit swing type vehicle in which a power unit including an engine is swingably supported by a vehicle body,
Especially for the improvement of the arrangement of the air intake for the supply air to the engine, so-called step-through type motorcycles called scooters, family bikes, soft bikes, etc., tricycles called sleta, and other power unit swing type vehicles it can.

[Conventional technology]

In this type of conventional vehicle, an air cleaner that supplies combustion air to an engine is attached to a unit case of a power unit, and an air inlet of the air cleaner is an open end of a duct protruding from the air cleaner. . The open end of this duct is opened directly in the rear body cover, and its position is relatively close to the ground and the engine in view of the connection with other parts. An example of such a configuration is disclosed in Japanese Utility Model Laid-Open No. 58-104352.

[Problems to be solved by the invention]

For this reason, in the conventional air cleaner, the air intake is provided at a position where it is easy to suck dust such as dust and rainwater from the wheels.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air cleaner for a power unit oscillating vehicle that can reduce the amount of dust and the like and that can suck in air having a temperature equal to the outside air temperature.

[Means for solving the problem]

The present invention has a step floor below a seat front portion of a vehicle body and swingably supports a power unit including an engine below the seat rear portion of the vehicle body, and directly below the seat front end lower surface on the front side of the power unit. A power unit oscillating type vehicle having a body center cover covering from the vehicle to the step floor, wherein a luggage box is arranged behind the body center cover, and an air intake for engine intake is arranged below the seat. And an air intake duct communicating with the air intake is formed between the luggage box and the body center cover, and extends downward along the inner surface of the body center cover from the air intake. Connect the lower end of the duct to the air cleaner on the intake side of the engine. A power unit swing type vehicle, characterized in that coupled to an intake pipe extending.

In the present invention, an air chamber may be provided between the intake duct and the intake pipe.

[Action]

In the present invention, the air taken into the engine is taken in from the air intake provided on the upper part of the body center cover, and the intake duct, the intake pipe, and
It enters the engine via an air cleaner or the like.

Here, since air is taken in from the upper part of the body center cover directly below the seat, the air taken into the engine has little sand dust and the like rolled up by wheels, etc., and is not heated by the engine. Can be supplied with clean and low-temperature air.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 4 show an embodiment in which the present invention is applied to a step-through type motorcycle. In FIG. 1 showing the overall configuration, a vehicle body 10 includes a frame 11, a front fork 13 is rotatably attached to a head pipe 12 provided at a front portion of the frame 11, and the front fork 13 A front wheel 16 is mounted via a front shock 14 and a pivot arm 15. Also,
The rear part of the frame 11 is a bifurcated rear pipe 17, which is connected and reinforced by cross members 18A, 18B, and 18C at three points, a front part, a center part, and a rear part.

At the front of the vehicle body 10, a leg shield 23 including a front cover 21 and an inner box 22 is attached to the frame 11, and the inner box
One end of a step floor 24, which is a step portion, is connected to the lower part of the body 22, and a body center cover 25 is erected on the other end of the floor 24. The rear pipe 17 at the rear of the frame 11 has a body center cover A luggage box 26 is supported behind 25. The support of the luggage box 26 to the frame 11 is
26A recess formed longitudinally over both lower surfaces of 26
(See FIG. 2) and the rear pipe 17 is fitted
A pair of ribs 26B protruding from the rear of the luggage box 26
The cross member 18C at the rear end of the rear pipe 17 is brought into contact with the lower surface of the rear pipe 17. A rear fender 27 is formed integrally with the rib 26B, a battery case 28 is formed on the rear fender 27, and a relatively lightweight member such as a battery 29 and an oil tank 30 is formed on the rear fender 27. Supported. By supporting a lightweight member with the rear fender 27 in this manner, the rear pipe 17 has a rearwardly projecting portion shortened, and thus is reduced in weight.

A seat 31 is disposed above the luggage box 26, and the seat 31 is supported by the luggage box 26 via a hinge 32 at its front end so as to be openable and closable. The body center cover 25 described above extends to just below the lower surface of the front end of the seat 31. Helmet 33 in the luggage box 26
In addition, accessories are designed to enter. A rear body cover 35 is provided around the luggage box 26.

A leg storage space 38 is formed by a space surrounded by the leg shield 23, the step floor 24, and the body center cover 25.

At a position below the luggage box 26, the power unit 40 is connected to the frame via the support shaft 71 of the link mechanism 70.
The power unit 40 is swingably supported by the lower part of the body 11, whereby the power unit 40 is swingable by the vehicle body 10. The power unit 40 includes an engine 41, a unit case 42 containing a power transmission mechanism (not shown), a rear wheel 43 rotatably supported by the unit case 42, and an exhaust pipe 44
An exhaust muffler 45 connected to the unit case 42 via the rear wheel 43 with the rear wheel 43 interposed therebetween is provided.
A rear cushion 46 is provided between the rear cushion 46 and the 18C.

At the rear of the unit case 42 of the power unit 40, an air cleaner 50 is supported via a bracket 51. As shown in FIG. 3, the air cleaner 50 includes an air cleaner element 52 made of sponge, filter paper, and the like. One side and the downstream side of the element 52 are connected via a connecting pipe 54 having a carburetor 53 in the middle. Connected to the engine 41. On the other hand, element 52
One end of an intake pipe 55 is connected to the other side and the upstream side, and a corrugated pipe-shaped flexible portion 56 is provided near the other end of the intake pipe 55 and near a position above the link mechanism 70. Are integrally formed. Furthermore, the intake pipe
An air intake portion 55A, which is the other end portion of 55, is fixed to a side surface of an air chamber 57 formed using a part of the lower surface of the luggage box 26 below the luggage box 26, and is opened in the chamber 57. ing. A connection portion 58A at one end of a connection duct 58 formed of a flexible member such as rubber is fitted into a square hole 57A formed on the front surface of the chamber 57,
The other end opening of the connection duct 58 is connected to an intake duct 59 (see FIG. 4) surrounded by a pair of ribs 25A and 26C formed on the inner surface of the body center cover 25 and the outer surface of the front portion of the luggage box 26, respectively. ). The intake duct 59 extends upward from a portion connected to the connection duct 58 and communicates with an air intake 59A provided at an upper portion of the body center cover 25. The air intake 59A is a sheet
31 is opened directly below the lower surface of the front end. Thus, air is taken into the air cleaner 50 from the air inlet 59A of the intake duct 59 through the inside of the duct 59, and further passes through the connecting duct 58 and the air chamber 57. The intake duct 59, the connection duct 58, the air chamber 57, and the intake pipe 55 form an intake path to the air cleaner 50.

In FIG. 1, a fuel tank 61 is provided below the step floor 24 and supported by the frame 11, and a stand 64 is provided on the frame 11 near the fuel tank 61 via a stand stay 65. It is supported rotatably.

 Next, the operation of the present embodiment will be described.

The supply of necessary air for starting the engine 41 is performed through an air cleaner 50. The intake of the air into the air cleaner 50 is performed by a body center cover behind a leg storage space 38 unique to a step-through type vehicle. Done from the top of 25. That is, the air intake formed between the upper part of the body center cover 25 and the lower part of the front part of the seat 31
Air is introduced from 59A into the intake duct 59 as shown by an arrow, and this air is introduced into the air cleaner 50 upstream of the air cleaner element 52 via the connecting duct 58 and the intake pipe 55.

On the other hand, as the vehicle travels, the power unit 40 swings around the support shaft 71 of the link mechanism 70 as the swing center, and the air cleaner 50 also swings with the swing, but the intake pipe 55 connected to the air cleaner 50 Since the flexible portion 56 is partially provided, the flexible portion 56 bends to cope with the swing of the air cleaner 50. At this time, since the flexible member 56 is disposed near the support shaft 71 of the link mechanism 70, the flexible member 56 has a small amount of bending, and the pipe length of the intake pipe 55 hardly changes.

According to the present embodiment as described above, the intake of air to the engine 41 of the power unit 40 swingable to the vehicle body 10 is performed by the air intake 59A of the intake duct 59 below the seat 31 and above the body center cover 25. The engine supply air can be sucked from the leg storage space 38, which is partitioned by the leg shield 23, the step floor 24, and the like, and into which dust and the like accompanying traveling can enter very little, so that dust and the like can be sucked. Is extremely low, and
There is no influence of heat radiation of the engine 41. In addition, air intake 59A
Is provided near the lower surface of the sheet 31, so that rainwater does not enter. Further, since the intake duct 59 is formed by the pair of ribs 25A and 26C provided integrally with the body center cover 25 and the luggage box 26, the structure can be made simple and inexpensive.

Further, since the flexible portion 56 provided near the support shaft 71 of the power unit 40 responds to the swing of the air cleaner 50 that swings with the power unit 40, the length of the intake pipe due to the swing of the power unit 40 is reduced. Changes are minimal and have little effect on engine performance.

Furthermore, since the flexible portion 56 of the intake pipe 55 is arranged near the upper part of the link mechanism 70, it is possible to prevent the hopping stone or the projecting portion of the road surface or the like accompanying the traveling of the vehicle from hitting the intake pipe 55 with the link mechanism 70. it can.

In FIG. 1, the running wind flows from between the stand stays 65 to the upper part of the engine 41 as indicated by an arrow S,
The engine 41 can be cooled effectively.

Further, an air chamber 57 is provided downstream of the intake duct 59, and the intake duct 59 and the intake pipe 55 are connected via the air chamber 57, so that the flow resistance of the intake path from the air intake 59A to the air cleaner 50 is reduced. Therefore, the intake air amount can be increased.

Moreover, since the air chamber 57 is provided in the dead space below the luggage box 26, the dead space can be effectively used.

Note that the present invention is not limited to the configuration of the above-described embodiment, and modifications within a range that can achieve the object of the present invention are included in the present invention. For example, the target vehicle is not limited to a two-wheeled vehicle, but can be applied to a three-wheeled vehicle having two rear wheels and other vehicles. In short, any type of vehicle having a power unit that can swing with respect to the vehicle body may be used. In the present invention, the flexible portion of the intake pipe 55
56 is not limited to a part of the pipe 55 and may be all, but if it is all, the intake pipe 55 accompanying the swing of the power unit 40
The configuration of the above embodiment is more advantageous since the deflection of the air intake pipe may extend over its entire length and may cause a change in the intake pipe length.

[Effect of the invention]

According to the present invention, dust and rainwater in the air supplied to the engine of the power unit, water from the road surface, and the like can be extremely reduced, and the temperature can be made equal to the outside air temperature.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention.
The figure is a longitudinal sectional side view partially showing the entire configuration, with the second part omitted.
The figure is an exploded perspective view of the main part, and FIGS. 3 and 4 are enlarged sectional views taken along lines III-III and IV-IV in FIG. 1, respectively. 10 ... body, 25 ... body center cover, 26 ... luggage box, 31 ... seat, 38 ... leg storage space, 40
…… Power unit, 50 …… Air cleaner, 55 …… Intake pipe, 56 …… Flexible part, 57 …… Air chamber, 59 ……
Intake duct, 59A …… Air intake.

Claims (2)

(57) [Scope of request for utility model registration] 1. A vehicle having a step floor below a front portion of a seat of a vehicle body and swingably supporting a power unit including an engine below the rear portion of the seat of the vehicle body, and a lower surface of the seat front end on the front side of the power unit. In a power unit swing type vehicle in which a portion from immediately below to the step floor is covered with a body center cover, a luggage box is arranged behind the body center cover, and an air intake for engine intake is arranged below the seat. An air intake duct provided at an upper portion of the cover and communicating with the air intake is formed between the luggage box and the body center cover, and extends downward along the inner surface of the body center cover from the air intake. Connect the lower end of the intake duct to the intake-side air cleaner of the engine. A power unit swing type vehicle characterized by being connected to an intake pipe extending to 2. In the first claim of the utility model registration claim,
A power unit swing type vehicle, wherein an air chamber is provided between the intake duct and the intake pipe.