JP2788471B2 - Undercover device for scooter type vehicle - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an undercover device for a scooter-type vehicle mounted on a lower surface of a footrest.

BACKGROUND OF THE INVENTION Scooter-type vehicles are known which have an engine between a substantially flat footrest and a rear wheel and incline the engine forward. In this case, it is desirable to cover the front of the cylinder with a cover because the engine is exposed to water, mud, dust, and pebbles that are rolled up by the front wheels. Therefore, conventionally, a rear portion of an under cover that covers a lower surface of a footrest is configured to cover the front of a cylinder.

However, the engine requires maintenance such as mounting and dismounting of a spark plug, and when the undercover is provided as described above, there is a problem that a space for maintenance cannot be secured and the maintainability is extremely deteriorated.

(Object of the Invention) The present invention has been made in view of such circumstances,
A scooter that makes it difficult for water, mud, and dust to adhere to pebbles and pebbles to the forward-inclined cylinder, improves the maintainability of the engine such as attaching and detaching spark plugs, and has a simple structure and a small number of parts. It is an object of the present invention to provide an undercover device for a type vehicle.

(Constitution of the Invention) According to the present invention, an object of the present invention is to provide a main tube which extends from a steering axle tube to a rearward diagonally downward and extends below a substantially flat footrest.
An engine having a body frame having a pair of left and right rear tubes fixed to the main tube below the footrest, and having a spark plug at a tip of a cylinder inclined forward substantially horizontally; A power unit, which is integrated with a transmission case that extends rearward from one side of the crankcase and holds a rear wheel at a rear end, and is disposed on the body frame so as to be swingable up and down, is provided with a scooter disposed behind the footrest. An air cleaner that covers one side of the cylinder and the ignition plug, and an air cleaner that covers the rear tube below the footrest from below and extends from a lower surface of the footrest to near a front edge of the air cleaner, and is in front of the cylinder. A resin undercover fixed to the vehicle body frame so as to cover a lower part, and the pair of left and right rear tubes is disposed at a lower front part of the footrest. The power unit is fixed to the main tube, rises obliquely rearward in front of the spark plug from below the rear of the footrest, extends rearward above the engine, and extends the power unit on the upper surface of the crankcase. The rear portion of the under cover is an extended portion in which the left and right side edges rise up to above the rear tube and the ignition plug and the central portion in the vehicle width direction is connected by a resin integral hinge and can be opened and closed downward, This is achieved by an undercover device for a scooter-type vehicle, characterized in that the extended portion can be locked to the rear tube.

(Embodiment) FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is a side view of a main part in which a part of an under cover is sectioned, and FIG. 4 is a plan view of the rear part of the undercover, FIG. 5 is a sectional view taken along line VV, and FIGS. 6 and 7 are lines VI-VI and VI in FIG.
It is an I-VII line end view.

In FIGS. 1 and 2, reference numeral 10 denotes a body frame, which is a main tube 14 extending obliquely downward and rearward from the steering shaft barrel 12, and a pair of left and right rear tubes 16 each having a front end fixed to the main tube 14 (only one is shown). And Rear tube 16
Is almost horizontally rearward after being bent obliquely upward and backward in the middle. Lower part of main tube 14 and rear tube
A horizontal footrest 18 is provided in the vicinity of the connection with the front portion 16. A leg shield 20 that stands upward is formed from the front end of the footrest 18, and the steering barrel 12 is located in the leg shield 20. A front fork 22 is held by the steering shaft barrel 12, and a steering front wheel 24 is held at its lower end. 26 is a steering wheel.

A power unit 30 includes a forced air-cooled two-cycle single-cylinder engine 32, and a transmission case 34 extending rearward from one side of the engine 32, and holding a driving rear wheel 36 at the rear end of the transmission case 34. It is. A V-belt continuously variable transmission is accommodated in the transmission case 34, and the output of the engine 32 is transmitted to the rear wheels 36 via this transmission. In the power unit 30, the upper surface of the crankcase of the engine 32 is supported by the bracket 16a of the rear tube 16 via the link 38 (FIG. 2), while the rear end of the transmission case 34 is elastically supported by the cushion unit 40. Have been. Here the engine 32 cylinder
32a is inclined substantially horizontally forward from the crankcase, and an ignition plug 32b is attached to the front end thereof. An air cleaner 41 is disposed on the left side of the engine 32. Here, the air cleaner 41 extends forward from the cylinder 32a, and covers the left side of the cylinder 32a and the ignition plug 32b. Reference numeral 42 denotes an operation seat, and reference numeral 44 denotes a carrier.

The footrest 18 is located at the rear of the main tube 14 and the rear tube 16
It is formed of a synthetic resin upper cover 50 that covers the front part of the front panel from above. The front part of the upper cover 50 is connected to the lower part of the leg shield 20. The rear portion of the upper cover 50 slightly rises toward the driving seat 42 and continues to the side cover.

The under cover 52 is made of a synthetic resin, and is attached to the vehicle body frame 10 so as to cover a lower surface of the upper cover. The front of the under cover 52 is
Extends above the front wheel 24 along the lower surface of the front wheel 24, and serves as mudguard for the front wheel 24. The rear portion of the under cover 52 is an extended portion 54 extending to a position close to the front edge of the air cleaner 41 and extending rearward so as to cover the front of the power unit 30, that is, the front of the cylinder 32a. As shown in FIGS. 4 and 5, the extension portion 54 can be opened and closed downward by a hinge 56 integrated with resin. That is, the undercover 52 is formed such that the left and right sides thereof are curved so that the left and right sides thereof are smoothly directed upward, and the left and right side edges rise up to above the rear tube 16 and the ignition plug 32b, while the central portion is substantially horizontal. The hinge 56 is formed by forming grooves 56a and 56b in the width direction of the vehicle body in the substantially horizontal portion at the center.

As shown in FIGS. 2 and 4, a tower 58 having a substantially trapezoidal shape in a side view is integrally formed on the inner surface, that is, the upper surface of the extension portion 54, and a projection 60 is integrally formed on the upper surface of the tower 58. A cross member 62 is stretched over the pair of left and right rear tubes 16, and a rubber annular grommet 64 is fitted into a flat plate portion formed substantially near the center of the cross member 62. The protruding portion 60 on the extension portion 54 side can be engaged with and disengaged from the grommet 64. Therefore, when the rotating end of the extending portion 54 is pushed upward, the protrusion 60 is fitted into the grommet 64, and the enlarged-diameter portion at the tip end of the protrusion 60 engages with the grommet 64 to extend the extension portion 54.
Is fixed in this position (ie, the closed position). Also, if the rotating end of the extension portion 54 is pushed down, the protrusion 60 escapes from the grommet 64, and the extension portion 54 can be opened downward.

When the extension portion 54 is opened downward in this manner, the cylinder 32
The right side of a, that is, the side opposite to the air cleaner 41 is largely opened to the right side. For this reason, the spark plug 32b of the engine 32 and the like can be easily attached and detached from the right side of the cylinder 32a by using a tool by utilizing the space between the open space and the pair of left and right rear tubes 16, 16, thereby improving the maintainability of the engine 32. It will be good. When the extension portion 54 is closed, the extension portion 54 covers the front of the engine 32, and the air cleaner 41
Since it covers one side of 2b, especially the spark plug of the engine 32
Water, mud, dust and the like do not adhere to the vicinity of 32b, and pebbles or the like from which the front wheel 24 jumps do not come into contact.

The under cover 52 is provided with a pair of circular windows 66 when viewed from the side. When a vertical wall 68 extending in the front and rear positions inside the window 66 is bolted to a bracket (not shown) on the body frame 10 side. A tool can be inserted through the window 66. Behind this window 66 is a wall in the vehicle width direction
70 is provided to prevent water, mud, etc. entering the under cover 52 from the window 66 from entering the air cleaner 41 (fourth and seventh).
Figure).

FIG. 8 is a sectional view of a main part of another embodiment. In this embodiment, a claw portion 60A is integrally formed on the inner surface (upper surface) of the extension portion 54A of the under cover 52A so as to be capable of engaging and disengaging with a cross member 62A bridged over the rear tube 16. Accordingly, by pushing or pulling down the extending portion 54 up and down while elastically deforming the vicinity of the claw portion 60A, the extending portion 54 can be easily formed.
Can be opened and closed.

(Effect of the Invention) As described above, the present invention integrally forms an extension at the rear portion of the undercover, and the extension has the left and right side edges rising up to above the rear tube and the spark plug, and the rear edge is formed by the cylinder and the ignition plug. It extends to near the front edge of the air cleaner that covers one side of the ignition plug and covers the front of the cylinder that tilts forward almost horizontally, so that water, mud, dust, pebbles, etc. can be prevented from hitting the engine. . Further, since the extension part can be opened and closed downward, by opening the extension part downward, one side of the cylinder, that is, the side opposite to the air cleaner can be greatly opened, while the power unit 30 The upper end of the crankcase is supported by the rear tube 16 and the front end of the rear tube 16 is fixed to the main tube below the front of the footrest 18 so that a space can be formed in front of the cylinder 32a. Maintenance is improved. Furthermore, since the extension portion is integrally formed with the under cover by a hinge integrated with resin and can be locked to the rear tube, an effect that the structure is simple and the number of parts is small is obtained.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is a side view of a main part in which a part of an under cover is cross-sectioned, and FIG. 3 is an enlarged cross-section of a fixing part of an openable and closable extension. FIG. 4 is a plan view of the rear part of the undercover, FIG. 5 is a sectional view taken along line VV, and FIGS. 6 and 7 are lines VI-VI and VII-V in FIG.
FIG. 8 is an end view taken along the line II, and FIG. 8 is a side view of another embodiment. 10 Body frame, 12 Steering barrel, 14 Main tube, 16 Rear tube, 18 Footrest, 30 Power unit, 32 Engine 32a Cylinder, 32b ... Spark plug, 36 ... Rear wheel, 41 ... Air cleaner, 52, 52A ... Under cover, 54, 54A ...

Claims (1)

(57) [Claims] 1. A main tube extending downwardly and obliquely rearward from a steering shaft barrel and extending below a substantially flat footrest, and a pair of left and right rear tubes whose front ends are fixed to the main tube below the footrest. An engine that has a body frame that has a spark plug at the tip of a cylinder that leans forward substantially horizontally forward, and a transmission case that extends rearward from one side of the crankcase of the engine and holds the rear wheel at the rear end are integrated And
In a scooter-type vehicle in which a power unit held to be able to swing up and down on a body frame is disposed behind the footrest, an air cleaner covering one side of the cylinder and a spark plug, and A resin undercover that covers a rear tube from below, extends from a lower surface of the footrest to near a front edge of the air cleaner, and is fixed to the vehicle body frame so as to cover a lower front of the cylinder;
The pair of right and left rear tubes are fixed to the main tube at the lower front part of the footrest, and are raised rearward and obliquely in front of the spark plug from below and below the footrest and extend rearward through the upper part of the engine. The power unit is supported by the rear tube on the upper surface of the crankcase, and the rear portion of the undercover rises up to the left and right side edges above the rear tube and the spark plug, and the central portion in the vehicle width direction is formed of a resin-integrated hinge. An undercover device for a scooter-type vehicle, wherein the extended portion is connected to be openable and closable downward, and the extended portion can be locked to the rear tube.