JP2005104313A - Side cover structure for motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side cover having a fine appearance and excellent in the commercial value, capable of effectively preventing the heat of an engine from being conducted to the legs of a rider when he makes knee grip running and allowing the cover as a whole to give an integrated sense. <P>SOLUTION: The side cover C installed under the seat of the motorcycle is composed of a cover body Cm covering the side of the body space right under the seat and a thinning extension part Ca extending in consolidation from the forefront of the cover body part Cm in such a way as thinning toward a head pipe H and covering the side of the body space right under a fuel tank T, and the upper side part of the engine E is covered with the extension part Ca. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is mounted on a motorcycle, particularly a motorcycle with the engine exposed to the outside, a fuel tank above the engine, and a seat behind the fuel tank. The present invention relates to a side cover structure in a motorcycle in which a side cover that covers the side of the vehicle body space directly below the seat is disposed on the side.

In general, motorcycles with most of the engine exposed to the outside are smaller in size and have better heat dissipation of the engine than full cowls, that is, motorcycles where most of the engine is covered with a cowl. Even in the former type of motorcycle, it is known that on-board parts such as an air cleaner and a rear cushion, which are disposed below the seat, are covered with the side cover, and the rear of the engine It is also known that a fuel supply device such as a carburetor disposed below the fuel tank is covered with a front cover member formed separately from the side cover (see, for example, Patent Document 1 below).
Japanese Patent No. 3367855

  However, in the above conventional structure, the side cover that covers the air cleaner and the like below the seat and the front cover member that covers the carburetor and the like below the fuel tank are separate and independent parts, which increases the number of parts and increases the cost. In addition, there was no sense of unity between the side cover and the front cover member in terms of appearance, and there was a problem in the design process. Further, in the above conventional structure, the side of the upper part of the engine is not covered by the front cover member, and is in a bare state, so that when the motorcycle operator performs knee grip traveling to close the left and right knees, May be transmitted to your feet.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a side cover structure for a motorcycle that can solve the above-described problems of the conventional structure with a simple structure.

  In order to achieve the above object, the invention of claim 1 is mounted on a vehicle body with the engine exposed to the outside, and a fuel tank is disposed above the engine and a seat is disposed behind the fuel tank. In a motorcycle in which a side cover is provided below the seat, the side cover covers the side of the vehicle body space directly below the seat, and the head pipe side from the front end of the cover main body. And a taper extension that covers the side of the vehicle body space directly below the fuel tank, and that covers the upper side of the engine.

  According to a second aspect of the present invention, in addition to the feature of the first aspect of the invention, the tapered extension portion of the side cover has a substantially straight line at the bottom edge of the extension portion when viewed from the side of the vehicle. It is formed so as to be oriented.

  According to a third aspect of the present invention, in addition to the features of the first or second aspect of the present invention, a fuel supply device is provided below the fuel tank and disposed near the upper portion of the engine to supply fuel to the engine. The taper extension of the side cover extends to the front side of the fuel supply device so as to cover the side of the fuel supply device.

  According to a fourth aspect of the invention, in addition to the features of the first to third aspects of the invention, an operation capable of opening and closing a fuel cock interposed in a fuel supply pipe communicating between the fuel tank and the fuel supply device. The lever is arranged to face a through hole formed in the side cover.

  According to a fifth aspect of the present invention, in addition to the features of any of the first to fourth aspects, the side of the air cleaner and the rear cushion respectively disposed below the seat is provided by the cover body portion of the side cover. It is characterized by covering.

  As described above, according to the invention of each claim, the side cover integrally extends in a tapered manner toward the head pipe side from the front end of the cover main body portion covering the side of the vehicle body space directly under the seat and the front end of the cover main body portion. And a tapered extension that covers the side of the vehicle body space directly under the fuel tank, and the tapered extension covers the upper side of the engine. It is possible to effectively prevent the heat from the engine from being transmitted to the feet when gripping. In addition, the side cover itself can be made as a single part by extending the tapered extension part integrally with the cover body of the side cover, so the cost can be reduced by reducing the number of parts and the entire cover. As a result, it is possible to obtain a side cover having a sense of unity, a good appearance appearance and excellent merchantability.

  In particular, according to the invention of claim 2, the tapered extension portion of the side cover is formed so that the lower edge of the extension portion extends substantially linearly and faces the head pipe in a side view of the vehicle. A rigid appearance can be obtained as if the cover is a main frame, particularly a twin tube frame, and the appearance is further improved.

  In particular, according to the invention of claim 3, the tapered extension part of the side cover can cover the upper part of the engine as well as the side of the fuel supply device arranged close to the upper part of the engine. A dedicated cover member that covers the fuel supply device is not required.

  In particular, according to the invention of claim 4, since the operation lever for opening and closing the fuel cock is arranged facing the through hole formed in the side cover, the tapered extension portion of the side cover extends to the head pipe side long. Even if the fuel cock is extended, the fuel cock can be opened and closed through the operation lever without any trouble, and the pipe and fuel cock around the operation lever can be covered with the side cover.

  In particular, according to the invention of claim 5, since the sides of the air cleaner and the rear cushion respectively disposed below the seat are covered by the cover body portion of the side cover, the air cleaner which is the original cover object of the side cover. Etc. can be covered nicely.

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  1 to 4 show an embodiment of the present invention. FIG. 1 is an overall side view of a motorcycle, and FIG. 2 is an enlarged side view of a main part of the motorcycle (FIG. 1). 3 is an enlarged perspective view of the left and right side covers, FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 2, and FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG.

  First, in FIG. 1, an engine E and its intake / exhaust system, a fuel tank T, a fuel supply system for guiding fuel from the tank T to the engine side, and the like are mounted on a body frame F of a motorcycle. A front wheel Wf is supported at the front end of the vehicle body frame F via a front fork 1 having a steering handle 2 at the top, and a swing arm SA supporting a rear wheel Wr is supported at a substantially lower center of the frame F. Are pivotally connected so as to be vertically swingable, and a rear cushion R is interposed between the swing arm SA and the vehicle body frame F. The driving force of the engine E is transmitted to the rear wheel Wr via the chain transmission mechanism 10.

  The vehicle body frame F includes a head pipe H that supports the front fork 1 so as to be steerable, a down tube DT that extends downward from the head pipe H and passes through the front side of the engine E, and is slightly rearwardly lowered from the head pipe H. A main frame MF that extends rearward and extends downward through the upper and rear sides of the engine E, and a seat tube ST that has a front end integrally coupled to an intermediate portion of the main frame MF and a rear end that extends rearward. The back tube BT is integrally connected between the intermediate portion of the seat tube ST and the rear portion of the main frame MF. An engine E is coupled and supported between a rear portion of the main frame MF and a lower portion of the down tube DT, and a tandem seat S is supported on the seat tube ST.

  A bottom portion of the fuel tank T disposed so as to straddle the main frame MF is supported on the upper portion of the main frame MF. Further, the upper end of the rear cushion R is pivotally connected to the seat tube ST and the air cleaner A is integrally supported. The rear cushion R and the air cleaner A are disposed below the front portion of the seat S.

  A step holder 3 is integrally coupled to an appropriate position of the vehicle body frame F (lower part of the main frame MF in the illustrated example), and a footrest step 4 for a rear seat occupant is attached to the front portion of the step holder 3. Further, a muffler support bracket 3a that supports an exhaust muffler M, which will be described later, is integrally formed. A lower cover 5 that covers the side of the vehicle body space immediately after the engine E is detachably attached to the lower outer surface of the main frame MF. The lower cover 5 is adjacent to the lower end of the side cover C, which will be described later, and covers the lower part of the main frame MF, the front end part of the back tube BT, and the base part of the step holder 3 in a style.

  The engine E includes a cylinder block CB in which the cylinder head CH is coupled to the upper part, and a crankcase CR integrally connected to the lower part of the cylinder block CB, and most of the engine is exposed to the outside. It is mounted on the body frame F. The crankcase CR also serves as a transmission case, and integrally includes a rear overhang portion CRa that projects rearward from the cylinder block CB. The crankcase CR houses a crankshaft and a speed change mechanism (none of which is shown) linked to the crankshaft, and an output shaft of the speed change mechanism is linked to the chain transmission mechanism 10.

  An exhaust pipe EX extends forward from the front surface of the cylinder head CH. The exhaust pipe EX gently reverses rearward near the down tube DT and extends rearward under the engine E, and an exhaust muffler M inclined slightly rearward is connected to the rear end portion thereof.

  An intake pipe IP communicating with the intake port of the head is connected to the rear surface of the cylinder head CH. An air cleaner A is connected to the upstream end of the intake pipe IP, and an engine E is connected to an intermediate portion thereof. A carburetor 6 is provided as a fuel supply device for supplying fuel. The intake pipe IP and the carburetor 6 are both disposed immediately below the fuel tank T, and the fuel reservoir of the carburetor 6 and the fuel tank T are connected by a fuel supply pipe L. A fuel cock V is interposed in the middle of the fuel supply pipe L, and an operation lever 7 for opening and closing the cock is connected to the cock V.

  A pair of left and right side covers C are disposed below the front part of the seat S, and a rear cowl 9 integrally coupled to the rear fender 8 is disposed below the rear part.

  Next, a specific configuration of the side cover C will be described with reference to FIGS. Each side cover C includes a cover main body Cm that covers the side of the vehicle body space directly below the seat S, and extends in a tapered manner from the front end of the cover main body Cm toward the head pipe H. It is comprised with the taper extension part Ca which covers the vehicle body space side right under T.

  The tapered extension portion Ca is formed such that the lower edge Cad of the extension portion Ca extends substantially linearly and faces the head pipe H (that is, tilts upward), while the extension thereof Ca is seen in a side view of the vehicle. The upper edge Cau of the part Ca extends substantially horizontally with the middle part slightly curved up and down so as to substantially follow the front lower edge of the seat S and the lower edge of the fuel tank T. Then, the lower edge Cad front end and the upper edge Cau front end of the taper extension portion Ca are connected so as to form an edge between the head pipe H and the front end side of the taper extension portion Ca is located in front of the fuel tank T. Gives an appearance impression that sinks into the subordinates and extends straight to the head pipe H side, so that the side cover C has a strong and rigid appearance as if it is a main frame, especially a twin tube frame. As a result, the appearance is improved and the merchantability is improved. This effect becomes remarkable when the side cover C is coated with a metallic material.

  The side cover C is detachably fixed and supported at appropriate positions of the vehicle body frame F and the fuel tank T. For example, in the illustrated example, the rear and lower mounting pieces Cmr and Cmd are integrally protruded from the rear end and the lower end of the cover main body Cm, and the rear and lower mounting pieces Cmr and Cmd are connected to the back tube. Polymerized on flat support portions BTr and BTd provided integrally with the BT and coupled with bolts 15. In addition, a plurality of support protrusions Cas arranged at intervals in the front-rear direction are integrally formed on the back surface of the tapered extension portion Ca, and these support protrusions Cas have a U-shaped cross section, and are mounting holes formed in the tip wall thereof. 12, the base 11b of the elastic locking claw 11 is fitted. These elastic locking claws 11 are integrally formed with an elastic claw portion 11a at the tip thereof, and this elastic claw portion 11a is integrally protruded from the bottom of the fuel tank T with a space in the front, rear, left and right directions. The support arm Ta is pushed into the through hole 13 and is elastically locked.

  Thus, the cover main body Cm of the side cover C covers the sides of the air cleaner A and the rear cushion R, which are respectively disposed below the seat S, over a wide range, while the tapered extension of the cover C is provided. Ca extends longer to the front side than the intake pipe IP, the carburetor 6 and the upper part of the engine E (that is, the top of the second half side of the cylinder head CH), and covers the upper part of the engine E, the carburetor 6 and the like.

  Further, the taper extension portion Ca is formed with an elongated first through hole 21 at a rear portion thereof, and a second portion having a substantially circular shape facing the operation lever 7 for opening and closing the fuel cock V at the front portion thereof. Through-holes 22 are formed. The first through hole 21 is a ventilation hole for facilitating the release of heat trapped in the inner space of the side cover C, and is formed in either the left or right side cover C. 22 is formed only on the side cover C on the side where the operation lever 7 is provided (right side in the illustrated example). Further, a shallow recess 23 that surrounds the first through hole 21 and extends rearward is formed on the outer surface of the side cover C across the tapered extension portion Ca and the cover main body portion Cm. In addition to improving the appearance, the effect of sucking heat inside the cover by the traveling wind passing through the cover surface is enhanced.

  Next, the operation of the embodiment will be described. In the operating state of the engine E, a large amount of heat is dissipated from the outer surface. However, in this embodiment, the front cowl is not provided and most of the engine E is exposed to the outside. Good properties. Therefore, if there is no side cover C (especially a tapered extension portion Ca) to be described later, heat from the engine is easily transmitted to the feet when the operator performs knee grip traveling that closes the left and right knees.

  However, the side cover C of the present embodiment integrally extends in a tapered manner toward the head pipe H side from the front end of the cover main body Cm and the cover main body Cm covering the side of the vehicle body space directly below the seat S. Since the tapered extension portion Ca covers the side of the vehicle body space directly below the fuel tank T and at least a part of the upper side of the engine E is covered by the tapered extension portion Ca, the heat shielding effect by the cover extension portion Ca. Thus, heat from the engine E can be effectively prevented from being transmitted to the foot during knee grip traveling. In addition, since the tapered extension portion Ca is integrally extended to the cover main body portion Cm of the side cover C, the side cover C itself can be made as a single component, so that the cost can be reduced by reducing the number of components. In addition, the side cover C has a sense of unity as a whole and has a good appearance and excellent merchantability.

  Further, the taper extension Ca of the side cover C covers not only the upper part of the engine E (the top part of the cylinder head CH) but also the side of the carburetor 6 and the intake pipe IP disposed close to the upper part of the engine. The dedicated cover member that covers the vaporizer 6 and the like is not necessary. In addition, since the operation lever 7 for opening and closing the fuel cock V is disposed facing the through hole 22 formed in the side cover C (tapered extension portion Ca), the taper extension portion Ca is directed to the head pipe H side. Even if the fuel cock V is extended for a long time, the fuel cock V can be opened and closed through the operating lever 7 without any trouble, and the piping around the operating lever 7 and the fuel cock V can be covered with the tapered extension portion Ca. it can.

  As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.

  For example, in the above embodiment, the fuel supply device applied to the engine E provided with the carburetor 6 is shown. However, in the present invention, the fuel supply device may be applied to an engine provided with a fuel injection device, In this case, the throttle body of the fuel injection device is disposed at the position of the carburetor 6 of the above embodiment, and the fuel injection nozzle of the fuel injection device is attached to the cylinder head.

  In the above embodiment, the lower cover 5 is disposed adjacent to the lower side of the side cover C. However, in the present invention, the lower cover 5 can be omitted, or the lower cover 5 is formed integrally with the side cover. May be.

Overall side view of a motorcycle according to an embodiment of the present invention. Main part enlarged side view of a motorcycle (enlarged view of the part indicated by arrow 2 in FIG. 1) Single perspective view of left and right side covers 4-4 enlarged sectional view of FIG. FIG. 5 is an enlarged sectional view taken along line 5-5. 6-6 enlarged sectional view of FIG.

Explanation of symbols

A ... Air cleaner C ... Side cover Ca ... Tapered extension Cad ... Lower edge Cm ... Cover body E ... Engine F ... Body frame (vehicle body)
H: Head pipe L ... Fuel supply pipe R ... Rear cushion S ... Seat T ... Fuel tank V ... Fuel cock 6 ... Vaporizer (fuel supply device)
7 ... Operating lever 22 ... through hole

Claims (5)

The engine (E) is mounted on the vehicle body (F) in a state exposed to the outside, a fuel tank (T) is disposed above the engine (E), and a seat (S) is disposed behind the fuel tank (T). In a motorcycle in which a side cover (C) is disposed below the seat (S),
The side cover (C) is integrally formed with a cover main body (Cm) that covers the side of the vehicle body space directly below the seat (S), and a taper from the front end of the cover main body (Cm) toward the head pipe (H). And a taper extension (Ca) covering the side of the vehicle body space directly below the fuel tank (T), and the taper extension (Ca) covers the upper side of the engine (E). A characteristic side cover structure for a motorcycle.   The tapered extension part (Ca) of the side cover (C) is formed so that the lower edge (Cad) of the extension part (Ca) extends substantially linearly and faces the head pipe (H) in a side view of the vehicle. The side cover structure in a motorcycle according to claim 1, wherein the side cover structure is provided.   Below the fuel tank (T), there is disposed a fuel supply device (6) that is disposed close to the upper portion of the engine (E) and supplies fuel to the engine (E), and this fuel supply device (6) side. The taper extension (Ca) of the side cover (C) extends to the front side of the fuel supply device (6) so as to cover the side. Side cover structure for motorcycles.   An operation lever (7) capable of opening and closing a fuel cock (V) interposed in a fuel supply pipe (L) communicating between the fuel tank (T) and the fuel supply device (6) is formed on the side cover (C). The side cover structure for a motorcycle according to any one of claims 1 to 3, wherein the side cover structure is disposed so as to face the through hole (22). The cover body (Cm) of the side cover (C) covers the sides of the air cleaner (A) and the rear cushion (R) respectively disposed below the seat (S). The side cover structure in the motorcycle according to any one of claims 1 to 4.

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