JP2000053055A - Motorcycle - Google Patents

Abstract

(57) [Summary] [Problem] It is possible to secure an arrangement space for an air cleaner, facilitate maintenance, and improve purification efficiency without local contamination. A head pipe rotatably supports a steering shaft, a main frame extending diagonally downward and rearward from the head pipe, and a main frame connected to a rear side of the main frame and extending diagonally upward and rearward. Seat rail 6,
In a motorcycle 1 having a back stay 7 extending obliquely upward and backward from below and behind the main frame 4 and supporting the seat rail 6 from below, a space formed by the main frame 4, the seat rail 6 and the back stay 7 To
An air cleaner 23 for taking air into the engine 20 is arranged. The air cleaner 23 is divided into right and left split cases 24 and 25.
A plate-like element 26 is sandwiched between the mating surfaces, and the plate-like element 26 is disposed with its upper part inclined outwardly of the vehicle body, and a right-side chamber 27 and a left-side chamber 28 are defined by the plate-like element 26. An intake port 30 for sucking air is provided in an upper part of the chamber 27, and air is supplied to a front part of the left chamber 28 in the engine 2.
A discharge port 31 for discharging to 0 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a motorcycle provided with an air cleaner.

[0002]

2. Description of the Related Art Conventional motorcycles include, for example, a head pipe for rotatably supporting a steering shaft, a main frame extending diagonally downward and rearward from the head pipe, and a diagonally upper part connected to the rear side of the main frame. Some have a seat rail extending rearward, and a back stay extending diagonally upward and rearward from behind and below the main frame to support the seat rail from below.

[0003]

Such a motorcycle is provided with an air cleaner. However, since the air cleaner requires a relatively large volume, it is difficult to secure an arrangement space, and the frequency of maintenance is high. Is bad. Further, an element for purifying air is arranged inside the air cleaner, and it is desired that this element has no local contamination, secures a ventilation area, and increases the efficiency of air purification.

The present invention has been made in view of the above circumstances, and provides a motorcycle capable of securing a space for arranging an air cleaner, easily performing maintenance, and improving purification efficiency without local contamination. It is intended to be.

[0005]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

According to the first aspect of the present invention, there is provided a head pipe rotatably supporting a steering shaft, a main frame extending obliquely downward and rearward from the head pipe, and an obliquely upper rear connected to the rear side of the main frame. And a backstay extending obliquely upward and rearward from below and behind the main frame and supporting the seatrail from below. The motorcycle is formed by the main frame, the seat rail and the backstay. An air cleaner that draws air into the engine is placed in the space where the plate element is sandwiched between the mating surfaces of the split case, and the plate element is arranged with its upper part inclined outward to the vehicle body. A right chamber and a left chamber are defined by the plate-like element, and air is sucked into the upper part of the right chamber. The provided, motorcycle, characterized in that the air to the front of the left chamber provided with a discharge port for discharging the engine. ].

According to the first aspect of the present invention, the air cleaner for taking in the engine is disposed by utilizing the space formed by the pair of left and right main frames, the seat rails, and the back stays, so that a relatively large volume is provided. It is easy to secure a space for arranging the air cleaner having the above. In addition, the space formed by the pair of left and right main frames, the seat rails and the back stays is a split case in which the side of the vehicle body is opened and the air cleaner is divided into right and left.
Maintenance can be easily performed by removing one of the split cases.

In the air cleaner, a plate-like element is attached to a mating surface of a split case which is divided into right and left parts. The attachment of the plate-like element does not limit the ventilation area of the element. It is arranged so as to be inclined in the direction, and the ventilation area of the element can be secured with a simple structure, and the efficiency of air purification can be increased. In addition, air is drawn into the narrow upper part of the right chamber of the air cleaner, flows into the left chamber through the plate element while flowing downward, so that the air flows evenly through the plate element. Local contamination of the element 26 is prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A motorcycle according to an embodiment of the present invention will be described below in detail with reference to the accompanying drawings. 1 is a side view of the motorcycle, FIG. 2 is a front view of the motorcycle, FIG.
4 is a plan view of the center of the motorcycle, FIG. 5 is a plan view of the center of the motorcycle, FIG. 6 is a diagram showing an assembled state of the front side of the body cover, and FIG. FIG. 8 is a left side view of a center portion of the motorcycle with a body cover removed, FIG. 9 is a right side view of a center portion of the motorcycle with a body cover removed, and FIG. FIG. 11 is a side view of a cover covering the lower part of the seat, FIG. 12 is a plan view of the cover covering the lower part of the seat, FIG. 13 is a cross-sectional view taken along line XIII-XIII of FIG. 1, and FIG. 1 is a cross-sectional view taken along the line XIV-XIV, FIG. 15 is a cross-sectional view taken along the line XV-XV in FIG. 1, FIG. 16 is a cross-sectional view taken along the line XVI-XVI in FIG. FIG. 18 is a left side view in which a part of the air cleaner is cut away,
FIG. 19 is a right side view in which a part of the air cleaner is omitted, and FIG.
0 is a rear view of the suction portion of the air cleaner.

The motorcycle 1 of this embodiment has a head pipe 3 for rotatably supporting a steering shaft 2, a pair of left and right main frames 4 extending obliquely downward and rearward from the head pipe 3, and a pair of left and right main frames. A rear arm bracket 5 connected to the rear end of the main frame 4, a pair of left and right seat rails 6 connected to the rear side of the pair of left and right main frames 4 and extending obliquely upward and rearward, and a pair of right and left connected to the rear arm bracket 5 And a backstay 7 for supporting the seat rail 6. A two-seater seat 80 is arranged above the pair of left and right seat rails 6.

A foot space 300 is formed between the head pipe 3 and the seat 80, and a portion from the periphery of the head pipe 3 to the lower part of the seat 80 is covered by a plurality of divided body covers 90.

The steering shaft 2 has a handle 8 at its upper end.
And a front fork 9 is fixed to the lower end, and a front wheel 10 is rotatably supported by the front fork 9. The front fork 9 has a front fender 11
Is fixed, and the front fender 11 turns right and left together with the front fork 9. The front fork 9 is provided with a front wheel disc brake caliper 12 for braking a brake disc 13 that rotates integrally with the front wheel 10.

The upper portion of the steering shaft 2 and the periphery of the handle 8 are covered with a handle cover 14 except for the grip portion of the handle 8. The handle cover 14 is integrally provided with a headlight 15 and meters 16 and the like. A guide 200 is provided at the lower part of the handle 8 in two vertical stages, and harnesses such as a brake hose, a headlight 15 and meters 16 and wires 201 are all passed through the guide 200 in the vertical direction. ing. Wires 20
1 is kept orderly, the appearance is improved, and the workability during maintenance is improved. The guide 200 has an upper stage located in the handle cover 14 and a lower stage located in the vehicle body cover 90.
01 is prevented from contacting the vehicle body cover 90 and the handle cover 14.

As shown in FIG. 7, the left and right main frames 4 have front portions 4a which are bent inward and are connected to the head pipe 3 when viewed from a plane, an intermediate portion 4b is substantially parallel, and a rear portion is provided. 4c is bent outward and connected to the rear arm bracket 5, the middle portion 4b is narrower, and the rear side portion 4c is wider than the middle portion 4b. The front side 6a of the pair of left and right seat rails 6 is connected to the rear side 4c of the pair of left and right main frames 4, the central portion 6b of the seat rail 6 is narrow, and the rear side 6c is bent outward to be wide. Is formed. The middle portions 4b of the pair of left and right main frames 4 are connected by a cross member 100, and the upper portions of the left and right rear arm brackets 5 are connected by a cross member 101.

As described above, when the pair of left and right main frames 4 are viewed from a plane, the middle part 4b is narrower, the rear part 4c is wider than the middle part 4b, and the vehicle width ahead of the seat 80 is narrower. The foot does not get caught when getting on and off, so that getting on and off is improved.

A bracket 102 is fixed to the main frame 4, and a bracket 103 is fixed to the cross member 101. In the engine 20 having the cylinder 20a inclined forward, the front upper portion of the crankcase is attached to the bracket 102, and the rear upper portion 2 of the engine 20 is mounted.
0b is mounted on the bracket 103, and the rear lower part 20c is mounted on the lower part of the rear arm bracket 5. An engine 20 having a forwardly inclined cylinder 20a is supported on a widened portion of the pair of left and right main frames 4, and the cylinder 20a is arranged below and close to the intermediate portion 4b.

The engine 20 is a two-stroke engine. A carburetor 21 is connected to a lower rear portion of the cylinder 20a. An air cleaner 23 is connected to the carburetor 21 via an intake duct 22. The air cleaner 23 is
As shown in FIG. 4, they are arranged in a space formed by a pair of left and right main frames 4, a seat rail 6 and a back stay 7.

As described above, the engine 20 is supported at a portion where the width of the pair of left and right main frames 4 is widened, and the forwardly inclined cylinder 20a is arranged close to the lower portion of the intermediate portion 4b, whereby a part of the engine 20 is provided. In other words, the carburetor 21 can be mounted by being positioned between the pair of left and right main frames 4 so that the vehicle height can be reduced. In addition, when the engine 20 is maintained, parts such as the carburetor 21 located in the wide portion are lifted upward. It can be detached from, and the maintainability is improved.

In the body cover 90 divided into a plurality,
The cover 90a that covers the lower part of the seat 80 is located under the front of the seat 80.
A pair of left and right main frames
Up to the side of the system 4. Cover the lower part of the seat
The bar 90a has an intermediate portion between the pair of left and right main frames 4.
An opening 91 is formed at the side of the vehicle that covers the lower side of 4b.
Have been. The cover 9 that covers the lower part of the seat in this way
0a is an opening at the side of the vehicle that covers below the intermediate portion 4b.
Since the part 91 is formed, as shown in FIG.
90 and cylinder 20 of engine 20 Use vacant space with a
And an air passage 92 is formed and opened toward the front of the vehicle.
Enters from the front of the body cover 90 and cools the engine 20
Traveling wind flows through the air passage 92 and is discharged from the opening 91.
It is possible to improve the cooling performance of the engine 20 efficiently.
it can.

As shown in FIGS. 17 to 20, in the air cleaner 23, the mating surfaces 24a and 25a of the split cases 24 and 25 are formed with irregularities, and the irregularities sandwich the periphery of the plate-like element 26. Screw 2
9 attached. The plate-like element 26 has a plate-like shape extending in the vehicle front-rear direction and the up-down direction, and is disposed with its upper part inclined toward the outside of the vehicle body.
6, the right room 27 and the left room 28 are defined, and the right room 2
7 is provided at the upper part of the left chamber 2 with the suction port 30 for sucking air.
A discharge port 31 for discharging air is provided at the front of the nozzle 8. The suction port 30 is formed in a suction duct 32 connected to a suction portion 25 b formed to extend rearward above the right chamber 27. In the suction duct 32, a suction port 30 is formed to open upward, and at a position where the suction port 30 is formed, a suction port 33 is formed to open downward and water or the like enters through the suction port 30. In some cases, the air cleaner 23 does not fall downward from the suction port 33 and enter the inside of the air cleaner 23. That is, the suction port 33 also functions as a drain port.

As shown in FIGS. 17 and 18, the intake duct 22 has a connecting portion 22a inserted into the front portion of the left chamber 28, and a mounting ring 35 is engaged with the connecting portion 22a. Tighten and fix with screws 36.

As described above, the pair of left and right main frames 4,
An air cleaner 2 that draws air into the engine 20 using a space formed by the seat rail 6 and the back stay 7
3 is arranged, and it is easy to secure a space for disposing the air cleaner 23 having a relatively large volume. The space defined by the pair of left and right main frames 4, the seat rails 6, and the back stays 7 is opened on the vehicle body side, and the air cleaner 23 is divided into left and right split cases 2.
The maintenance cases can be easily performed by removing the split case 25.

In the air cleaner 23, the plate-like element 26 is sandwiched between the mating surfaces 24a and 25a of the split cases 24 and 25, so that the ventilation area of the plate-like element 26 is maximized. Further, the plate-like element 26 is disposed with the upper part inclined toward the outside of the vehicle body. With a simple structure, a large ventilation area of the element can be ensured to increase the efficiency of air purification, and to improve maintenance. Frequency can be reduced.

The air is sucked into the narrow upper portion of the right side chamber 27 of the air cleaner 23, and flows into the left side chamber 28 through the plate-like element 26 while flowing downward, so that the air flow is evenly distributed to the plate-like element 26. Therefore, local contamination of the plate-like element 26 is prevented.

The left and right rear arm brackets 5 include
As shown in FIGS. 8 to 10, a pivot shaft 40 is provided, and the front end 41a1 of the rear arm 41 is rotatably supported by the pivot shaft 40 as a fulcrum. Rear arm 4
An axle 42 extends over rear ends 41a2 of the left and right arms 41b and 41c, and a hub 44 of a rear wheel 43 is rotatably supported on the axle 42. A rear cushion 45 is provided between the rear arm 41 and the seat rail 6, and the rear arm 41 swings up and down around the pivot shaft 40.

A sprocket 46 is provided on one of the hubs 44 of the rear wheel 43, and a chain 49 extends between the sprocket 46 and a sprocket 48 provided on an output shaft 47 of the engine 20. . The rear fender 50 located above the rear wheel 43 is attached so as to move integrally with the rear arm 41. That is, a mounting portion 50 a extending downward is formed on the right side of the rear fender 50, and the mounting portion 50 a is applied to the upper surface of the right arm portion 41 b, and is fastened and fixed with the bolt 51. On the left side of the rear fender 50, as shown in FIG.
b and the co-fastening portion 50c.

An engaging portion 52a of the chain cover 52 that covers the chain 49 is engaged with the engaging portion 50b, and the mounting portion 52b of the chain cover 52 is applied to the joint fastening portion 50c and fixed to the left arm portion 41c. Are fixed together by bolts 54 to the stay 53. The rear portion of the chain cover 52 is fastened and fixed to a stay 55 fixed to the left arm portion 41c by a bolt 56. The left front portion of the rear fender 50 is fastened and fixed to the stay 57 of the left arm portion 41c with a bolt 58, and the front side portion of the chain cover 52 is also fastened and fixed to the stay 57 with a bolt 59.

A brake disc 60 is provided on the other side of the hub 44 of the rear wheel 43 and rotates integrally with the front wheel 43. A bracket 61 supported by an axle 42 is fastened and fixed to the right arm portion 41b by a bolt 62. This bracket 61 has a rear disc brake caliper 63
Is attached, and the brake disc 60 is braked.

The rear disc brake caliper 63 is
It is connected to a master cylinder 65 via a brake hose 64. The master cylinder 65 is fixed by bolts 67 to a bracket 66 fixed to the rear arm bracket 5. The brake hose 64 is attached to the bracket 6
1, holding members 69 and 70 fastened together with the mounting portion 50 a of the rear fender 50, and a holding member 72 fixed to the reinforcing plate 71 of the rear arm 41. The master cylinder 65 can be operated by a brake pedal 73.

A support shaft 74 is fixed to the brake pedal 73, and the support shaft 74 is rotatably supported by the right rear arm bracket 5. The brake pedal 73 is swingable with a support shaft 74 as a fulcrum, and is supported by the rear arm bracket 5 directly and with a simple structure.

A return spring 75 is provided between the brake pedal 73 and the rear arm bracket 5 on the right side, and the brake pedal 73 is operated against the return spring 75 to push the push rod 76 of the master cylinder 65. A hydraulic pressure is generated and the brake hose 64
Through to the rear disc brake caliper 63,
The rear wheel disc brake caliper 63 operates to brake the brake disc 60.

Below the pair of right and left rear arm brackets 5, a bracket 77 and a bracket 500 are provided, and the bracket 77 is provided with a main stand 78a. Further, a side stand 78b is provided on the support portion 79 provided on the bracket 500. The bracket 500 includes a foot step 81.
Is provided.

A fuel tank 82 is disposed between the pair of left and right seat rails 6. The flange portion 82a formed around the fuel tank 82 has its front side fastened and fixed to the bracket 83 of the seat rail 6 by bolts 84 and its rear side fastened to the bracket 85 of the seat rail 6 by bolts 86. Fix it. Bottom 82 of fuel tank 82
b is located at a position between the pair of left and right seat rails 6, and the tank capacity is increased accordingly. A control device 87 and a battery 88 are provided in a space in front of the fuel tank 82.
Is arranged.

The seat 80 includes a bottom plate 80a, a cushion member 80b, and a skin 80c. Bottom plate 80
The brackets 9 provided on the pair of left and right seat rails 6 with the front part and the rear part of
9, 400. Further, dampers 93 and 94 are provided on the bottom plate 80a.
3 and 94 are pressed against the upper surface of the fuel tank 82 and the seat 8
0 is supported.

At the center of the fuel tank 82, an injection portion 82
c is provided. The rubber cover 501 covering the upper surface of the fuel tank 82 has ribs 50 surrounding the injection portion 82c.
1a is provided. On the bottom plate 80a of the sheet 80,
The rib 80a1 is provided so as to surround the outer periphery of the rib 501a. As described above, the rib 80a1 and the rib 501a form a labyrinth structure, and even if water enters from below the sheet 80, the rib 80a1 and the rib 501a may be used.
a does not reach the injection portion 82c.

As shown in FIG. 16, the rear portion of the two-seater seat 80 is located between the outer peripheral portion 80a2 of the bottom plate 80a and the central portion 8a.
Oa3 is curved and extends downward to increase the cushion pressure.

A cover 90a that covers the lower part of the seat among the plurality of divided body covers 90 extends integrally from the lower front part of the seat 80 to the front side and covers the side of the main frame 4 as shown in FIGS. As shown in FIG. 12, the lower portion 90a1 of the seat 80 and the
a2 is integrally formed, and even if the foot at the time of getting on and off hits the cover 90a and may be damaged, it can be easily replaced.

A cover for covering the lower part of the sheet 80 is provided.
This is a very simple configuration in which the 90a is integrally extended to the front side, and there is no increase in the number of parts. Further, a cover 90a that covers the lower part of the seat extends integrally from the lower front part of the seat 80 to the front side and covers up to the side surface of the main frame 4,
Since it is divided into left and right, the degree of freedom of design is expanded, and by removing one of the covers 90a, the side of the vehicle body can be largely opened, so that the carburetor and the engine 20 can be serviced at once, thereby improving maintainability.

A cover 90a for covering the lower part of the seat is provided.
Is composed of an unpainted resin, and the other covers, that is, the left and right rear cowls 90b, and the left and right under-covers 90f,
The left and right leg shields 90d and the upper cover 90e are made of a coating resin. By configuring the cover 90a covering the lower part of the seat with non-painted resin in this manner,
Even when the foot when getting on and off may hit and damage the cover 90a, the color of the cover 90a is prevented from changing,
Scratches can also be less noticeable. In addition, the cover 90a that covers the lower part of the sheet, which is not so noticeable, is made of a non-painted resin, and the other cover is made of a painted resin, so that the commerciality is sufficiently maintained.

An opening 9 is formed in the front side surface of the cover 90a.
1 are formed, and the traveling wind for cooling the engine 20 is exhausted from the opening 91, so that the cooling performance of the engine can be efficiently improved.

On the front side of the left and right leg shields 90d,
The front upper end of each of the left and right undercovers 90f is a screw 1.
It is fastened and fixed by 10 and assembled in advance. The left and right undercovers 90f to which the leg shields 90d are sub-assembled are fastened and fixed with screws 120. Further, each undercover 90f is connected to the head pipe 3
Screws 1 on both sides of the connecting stay 121 fixed to
22 are tightened and fixed.

The assembly parts of the left and right leg shields 90d are as follows.
As shown in FIGS. 2 and 6, cover with a decorative cover 130,
The cosmetic cover 130 is fastened and fixed to the under cover 90f at three places by screws 131. The decorative cover 130 has an opening 130a formed therein.
The running wind is taken in from 30a.

[0043]

As described above, according to the first aspect of the present invention, the air cleaner that takes in the engine is disposed by utilizing the space formed by the pair of left and right main frames, the seat rails, and the back stays. It is easy to secure a space for disposing the air cleaner having a relatively large volume. In addition, the space formed by the pair of left and right main frames, seat rails and back stays is open to the side of the vehicle body, and the air cleaner is a split case with left and right splits. Maintenance can be easily performed by removing one split case. Can do it.

Further, in the air cleaner, a plate-like element is attached to the mating surface of the split case of the left and right splits, and the attachment area of the plate-like element does not limit the ventilation area of the element. It is arranged so as to be inclined in the direction, and the ventilation area of the element can be secured with a simple structure, and the efficiency of air purification can be increased. In addition, air is drawn into the narrow upper part of the right chamber of the air cleaner, flows into the left chamber through the plate element while flowing downward, so that the air flows evenly through the plate element. Local contamination of the element 26 is prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle.

FIG. 2 is a front view of the motorcycle.

FIG. 3 is a plan view of the motorcycle.

FIG. 4 is a side view of a central portion of the motorcycle.

FIG. 5 is a plan view of a central portion of the motorcycle.

FIG. 6 is a diagram showing an assembled state of the front side of the vehicle body cover.

FIG. 7 is a plan view of the vehicle body frame.

FIG. 8 is a left side view of a central portion of the motorcycle with a body cover removed.

FIG. 9 is a right side view of a central portion of the motorcycle with a body cover removed.

FIG. 10 is a diagram showing an attached state of a vehicle body frame and a master cylinder.

FIG. 11 is a side view of a cover that covers the lower part of the seat.

FIG. 12 is a plan view of a cover that covers the lower part of the seat.

FIG. 13 is a sectional view taken along the line XIII-XIII in FIG. 1;

FIG. 14 is a sectional view taken along the line XIV-XIV of FIG. 1;

FIG. 15 is a sectional view taken along the line XV-XV in FIG. 1;

FIG. 16 is a sectional view taken along the line XVI-XVI of FIG. 1;

FIG. 17 is a cross-sectional view of an arrangement portion of an air cleaner.

FIG. 18 is a left side view in which a part of the air cleaner is broken.

FIG. 19 is a right side view in which a part of the air cleaner is omitted.

FIG. 20 is a rear view of a suction portion of the air cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Steering shaft 3 Head pipe 4 Main frame 5 Rear arm bracket 6 Seat rail 8 Handle 20 Engine 23 Air cleaner 24, 25 Split case 26 Plate element 27 Right chamber 28 Left chamber 30 Inlet 31 Outlet

Claims (1)

[Claims] 1. A head pipe rotatably supporting a steering shaft, a main frame extending diagonally downward and rearward from the head pipe, a seat rail connected to the rear side of the main frame and extending diagonally upward and rearward, In a motorcycle having a backstay extending obliquely upward and rearward from below and behind the main frame and supporting a seat rail from below, an intake air is supplied to an engine into a space formed by the main frame, the seat rail and the backstay. The air cleaner has a plate-like element sandwiched between the mating surfaces of the split cases, and the plate-like element is arranged with its upper part inclined toward the outside of the vehicle body. A right-side chamber and a left-side chamber are defined, and an intake port for sucking air is provided at an upper portion of the right-side chamber. Motorcycle, characterized in that a discharge port for discharging the air to the engine.