JP2529019Y2 - Motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION Field of the Invention The present invention relates to an automatic vehicle having a pair of left and right large main body frames each having a pair of right and left longitudinally extending rearward of the vehicle body connected to a head pipe with an engine mounted between front and rear wheels. The present invention relates to a motorcycle, and more particularly to an arrangement relationship of an air cleaner in the motorcycle.

Problems to be solved by the conventional technology and the invention In a motorcycle equipped with an engine between the front and rear wheels,
It is common to place the air cleaner behind the engine, below the seats, or above the engine, but it is difficult to place the air cleaner in such a narrow space, and the air inlet of the air cleaner blows the hot air discharged from the engine. If it is located at a position where it is easy to inhale air, the charging efficiency of the engine is reduced. Further, when the intake port of the air cleaner is at a low position, mud, dust and the like jumped up by wheels easily enter the air cleaner, and the filter element is contaminated at an early stage.

The present invention was created under such circumstances,
In a motorcycle having an engine mounted between front and rear wheels and having a pair of left and right main body frames extending to the rear of the vehicle body connected to a head pipe, an air cleaner and an intake port are arranged at a position as high as possible and forward of the vehicle body. In addition to avoiding the effect of heat released from the engine on the intake air, the filter elements are not contaminated by mud, dust, etc., jumped up by the wheels, the dead space between the left and right main body frames is effectively used, and the head pipe is It is another object of the present invention to improve the strength and rigidity of the vehicle body by maintaining the weight of the vehicle body by integrating the left and right main body frames and the air cleaner case.

Means for Solving the Problems This object is achieved by arranging an air cleaner between the left and right main body frames near the head pipe, and arranging a lower peripheral edge of the fuel tank on the upper surface of the left and right main frames via a sealing material. The air cleaner is contacted to cover the air cleaner from above, and the leading edge of the lower protruding portion of the surface component of the air cleaner is brought into contact with the vehicle body frame via a sealing material, so that the bottom wall of the fuel tank and the air cleaner are separated. A closed space is defined by the surface component members and the left and right main body frames, and the intake opening of the air cleaner is opened in the closed space, and the influence of heat released from the engine passes through the left and right main frames. By opening a ventilation opening for introducing outside air that is not affected by the air into the closed space,
The air cleaner is located in the space between the right main body frames.
A case is positioned, and an upper wall, a peripheral wall, and a bottom wall of the air cleaner case are integrally connected to the head pipe and the side walls of the left and right main body frames. The air cleaner case is constituted by the side wall of the air cleaner case, the upper wall, the peripheral wall, and the bottom wall of the air cleaner case, and the intake port of the air cleaner is formed on the side wall of the main body frame which also serves as the side wall of the air cleaner case. .

Embodiment An embodiment of the present invention shown in FIGS. 1 to 5 will be described below.

FIG. 1 shows a motorcycle 1 as a schematic side view of a main part, in which an engine E is mounted between front and rear wheels FW and RW (in the figure, R indicates a radiator).

The body frame of the motorcycle 1 is a light alloy cast product, and includes a head pipe 2, a pair of left and right main body frames 3 connected to the head pipe 2 and extending rearward of the vehicle body, and left and right main body frames 3. A pair of left and right engine support pipes 12 extending in a downward direction of the vehicle body are formed as main members. The structure consisting of the head pipe 2, the main body frame 3, and the engine support pipe 12 is formed by projecting the left and right split halves as an integral casting on a vehicle center plane (vertical plane) including the center axis of the head pipe 2. It is assembled by welding together. When distinguishing between the left and right half halves, L and R are appended to the reference numerals, respectively, and are represented as 3L and 3R.

The main body frame 3 is a rectangular tubular body having a large vertical width,
The upper wall 4, the wide outer wall 5, the similarly wide inner wall 7 and the lower wall 9 are formed as peripheral walls, and the inside thereof is partitioned into a plurality of chambers by partition walls 11 located at a plurality of positions in the length direction. .
The inner walls 7L, 7R of the main body frames 3L, 3R are welded close to each other while smoothly curving from the rear side of the vehicle body toward the front side, and are positioned at the curved parts to form one of the lower walls 9L, 9R. The portion extends in the form of a shelf toward the rear of the vehicle body to form flanges 10L and 10R, and the flanges 10L and 10R are also butt-welded to each other. Further, at a position close to the head pipe 2, the outer wall 5L, the inner wall 7L, the outer wall 5R, and the inner wall 7R are respectively provided with a vent 6L, a vent 8L, and a vent 6L.
R, vent 8R is formed, vent 6L and vent 8L, vent 6R
The air cleaner 13 disposed in the center space of the vehicle body sandwiched between the main body frames 3L and 3R can be seen from the outside through the two openings on the left and right sides, respectively.

The air cleaner 13 is disposed near the head pipe 2 and in a substantially horizontal posture, and the front half thereof has left and right main body frames 3.
It is located between L and 3R. Air cleaner 13 case 14
Is provided with a flange 18A extending forward or to both left and right sides of the vehicle body on the outer periphery of the front half thereof, and a hanging wall 18B vertically provided on the bottom wall 15 over a predetermined range in the vehicle width direction, and a sealing formed of an elastomer. The lower edge of the hanging wall 18B to which the material 19B is attached is in contact with the upper surface of the flange 10 (the flange of the main body frame 3), and the leading edge of the flange 18A to which the sealing material 19A is attached is
The lower surface of the air cleaner 13 is in contact with the curved inner side walls 7L and 7R below the air cleaners L and 8R.
It is composed of a case 14 and a cover 20. The fuel tank 30 is placed on the main body frames 3L and 3R so as to cover the air cleaner 13 from above, and is fixed to the body frame at points A and B before and after. The point B is the main body frame 3
It is on a horizontal frame that connects a pair of left and right seat support frames 3A connected to.

An elastomeric sealing material 33 is attached to the lower peripheral edge 32 of the fuel tank 30, and the sealing material 33 is in contact with the upper walls 4L, 4R of the main body frames 3L, 3R. Thus, the flange 18A and the hanging wall 18B of the air cleaner case 14 are
And the lower peripheral edge 32 of the fuel tank 30 is
In the structure in contact with the upper walls 4L and 4R of the 3L and 3R, the bottom wall 31 of the fuel tank 30, the main body frame 3, the air cleaner case 14
A closed space D defined by the bottom wall 15, the flange 18A, and the hanging wall 18B (not a closed space, but the rear side of the vehicle body is open, and the air vents 6, 8 are also open). 13 will be located.

Here, the detailed structure of the air cleaner 13 will be described.
The air cleaner 13 includes an air cleaner case 14, a cover 20 covering the air cleaner case 14 from above, an intake cylinder 23 integrally attached to the cover 20, a lower cover 34 covering the air cleaner case 14 from below, an air cleaner case 14, An element 26 sandwiched between the covers 20 and a wire mesh frame trap 25 fixed to the air cleaner case 14 are configured as main members. An opening 16 is formed in the bottom wall 15 of the air cleaner case 14 and a hanging wall 18 extends in the vehicle width direction.
B is provided vertically, and a flange 18A extending in the lateral direction is protrudingly provided on a peripheral wall 17 connected to the bottom wall 15. Lower cover 34 that covers opening 16
Uses the communicating pipe CT extending from the carburetor C as the air cleaner 13
To be introduced into the clean room. The element 26 sandwiched between the air cleaner case 14 and the cover 20
Consists of a base frame 27 and a filter paper 29, and rubber strips 28, 2
8 is attached to prevent contaminated air from directly passing between the element 26 and the base frame 27.

The peripheral wall 17, the cover 20, and the intake cylinder 23 of the air cleaner case 14 have no angular portions, the air cleaner 13 has a generally turtle-shaped shell as a whole, and the intake cylinder 23 attached to the cover 20 has a front end of the air cleaner 13. The intake port 24 is located on the front side of the vehicle body with respect to the ventilation port 8 of the main vehicle body frame 3.

This embodiment is configured as described above. During traveling of the vehicle, the traveling wind F enters the closed space D through the vents 6 and 8 of the main body frame 3 and the surrounding wall 17 of the air cleaner case 14
Or, after hitting the peripheral wall 21 of the cover 20, it is sucked into the intake cylinder 23 from the intake port 24. On the other hand, the hot air G of the engine E discharged from the radiator R located below the head pipe 2 flows to the rear side of the vehicle body while rising, but the air cleaner 13 is located between the left and right main body frames 3L, 3R. Sealing material 1
The hot air G enters the closed space D due to the contact relationship between the hanging wall 18B with the attached 9B and the flange 10 and the contact relationship between the flange 18A with the sealing material 19A and the inner walls 7L and 7R. Is shut off.

 The features of this embodiment are as follows.

The main body frame 3 is formed as a rectangular tube having a large vertical width, and the contact relationship of the flange 18A with the wide inner walls 7L and 7R, the contact relationship of the hanging wall 18B with the flange 10, and the air cleaner 13 from above. The intake port 24 of the air cleaner 13 is located in a closed space D defined by the covering fuel tank 30 mounted on the main body frame 3, and the engine E body and the radiator are located in the closed space D. Hot air G emitted from R hardly enters, and the traveling wind F
Only enters, so that the charging efficiency of the engine E is improved.

The air intake port 24 of the air cleaner 13 is located closer to the head pipe 2 than the ventilation ports 6 and 8 of the main body frame 3, and their positions are shifted, so that the traveling wind entering the closed space D through the ventilation ports 6 and 8. F first collides with the peripheral wall 17 of the air cleaner case 14 or the peripheral wall 21 of the cover 20, and the traveling wind F whirls and reaches the intake port 24. Therefore, a relatively large foreign matter does not enter the air cleaner 13 and the element 26
Burden is reduced.

The traveling wind F that has entered the closed space D through the vents 6 and 8 of the main body frame 3 flows as a vortex to the intake port 24 side, but the air cleaner 13 has a shape having no angular portion as a whole. , Wind noise is less likely to occur.

Since the air cleaner 13 is arranged near the frontmost portion of the vehicle body and at the same height level as the head pipe 2, and the air inlet 24 of the air cleaner 13 is arranged in the closed space D, the influence of mud, muddy water, etc., jumped up by wheels. Does not reach the air cleaner 13.

In the above embodiment, as shown in FIG.
5, when the tubular body 35 is fitted over the ventilation holes 6, 8 of the inner wall 7, it is possible to prevent the generation of resonance noise when traveling wind passes through the ventilation holes 6, 8, and to prevent the main body frame 3 Mud, water, etc., can be prevented from entering the hollow portion of the housing.

A flange 18 attached to the bottom wall 15 of the air cleaner case 14 is also provided.
A, the hanging wall 18B is integrated, and as shown in FIG. 7, the flange 18C is brought into contact with the flange 10 of the main body frame 3, and the other part of the flange 18C is brought into contact with the inner side walls 7L, 7R as in the previous embodiment. You may make contact.

 8 and 9 show a modification.

In this example, cross pipes 7D matching the ventilation holes 6C, 8C formed in the outer walls of the left and right main body frames 3C connect the inner walls of the left and right main body frames 3C. The traveling wind enters the cross pipe 7D through the vents 6C, 8C, and blows out from the vent 7d formed on the front side of the cross pipe.

A front portion of a flange 18A extending from the air cleaner case 14D is formed in a bent shape, and is in contact with the flange 10D of the vehicle body frame. The flange 18A has a vent 18a formed at a position corresponding to the vent 7d, and a pair of hanging walls 18b, 1
8c, the surface component of the air cleaner is composed of an air cleaner case 14D and a cover 20D.

7E is a heat shield made of resin, which is supported by a cross pipe 7D and left and right engine support pipes 12C, and is heated by a radiator and an engine together with a rubber heat shield 7F attached to the lower surface of the heat shield 7E. Is prevented from reaching the vent 18a of the collar 18A.

According to such a configuration, during traveling of the vehicle, the traveling wind from the front of the vehicle body, which is not affected by the hot air, enters the cross pipe 7D through the ventilation ports 6C and 8C of the main body frame 3C, and the ventilation port of the cross pipe 7D The running wind gushes from 7d is the ventilation port 1 of Tsuba 18A
The air enters the closed space D through 8a and is sucked into the air cleaner 13C.

The hanging walls 18b and 18c hung on the lower surface of the flange 18A function to prevent raindrops, mud, and the like flying from the front of the vehicle body from reaching the vent 18a of the flange 18A.

A pair of ridges 4c protrude from the upper surface of the main body frame 3C, and a sealing material 33C attached to a lower peripheral edge 32 of the fuel tank 30 is provided.
The position of the fuel tank 30 is prevented from being shifted by the engagement relationship with the fuel tank 30.

Next, another embodiment shown in FIGS. 10 and 11 will be described.

The motorcycle 36 has a water-cooled engine E mounted between front and rear wheels FW and RW. The body frame of the motorcycle 36 is
A head pipe 37, a pair of left and right main body frames 38 connected to the head pipe 37 and extending rearward of the vehicle body, and a pair of right and left engine support pipes 45 connected to the main body frame 38 and extended downwardly of the vehicle body as main members. These members (head pipe 37, main body frame 38, engine support pipe 45) are integrally cast products made of a light alloy, and the air cleaner case 46 positioned between the main body frame 38 also includes these members. And are formed integrally. Air cleaner case 46
Is located immediately after the head pipe 37, is composed of a peripheral wall 47, an upper wall 48, and a bottom wall 50, and a part of the main body frame 38 also serves as a case wall. An opening 49 for removing sand after casting is formed in the upper wall 48 of the air cleaner case 46, and an opening / closing lid is attached to the opening 49, and is used for attaching and detaching the element 53. The bottom wall 50 has an opening 51 (used for sand removal) into which a communication pipe CT for communicating and connecting the clean room of the air cleaner and the carburetor C is inserted, and a drain outlet 52.

The main body frame 38 is a rectangular pipe having a large vertical width,
An upper wall 39, an outer wall 40, and a similarly wide inner wall 42 and a lower wall 44.The outer wall 40 has a vent 41, and the inner wall 42 has a vent 43 facing the inner chamber of the air cleaner case 46. Is formed. The vents 41 and 43 may be formed at the same position as shown in the figure. However, if the vents 41 and 43 are formed at different positions, the traveling wind entering the main body frame 38 through the vent 41 hits the inner wall 42 and the inertia There is an advantage that a part of dust and the like is removed from the air flow by the collision.

A fuel tank 54 is disposed behind the air cleaner case 46 between the left and right main body frames 38, and an upper body cover 56 that covers the air cleaner case 46 and the fuel tank 54 from above is provided on the left and right sides. Of the main body frame 38 of FIG.

According to the configuration of this embodiment, there is an advantage that the front end portion (the portion connected to the head pipe 37) of the main body frame 38, which requires high strength and rigidity, is reinforced and stiffened by the air cleaner case 46.

In addition, in the structure in which the air cleaner is disposed in the same portion by using the space sandwiched between the left and right main body frames 38 having a large vertical width, not only can the dead space be effectively utilized, Since the position is close to the front end of the vehicle body and close to the highest position of the vehicle body, muddy soil, muddy water, etc., jumped up by wheels during traveling of the vehicle, jump into the ventilation holes 41, 43 of the main vehicle body frame 38, which is an intake port of the air cleaner. The load on the element 53 is reduced with little occurrence. In addition, vent 4
Positions 1 and 43 are positions that are hardly affected by the hot air emitted from the radiator R, and can improve the supply and charging efficiency of the engine E.

Effects of the Invention As is clear from the above description, the following effects can be obtained according to the present invention.

According to the configuration described in claim (1), by disposing the air cleaner in the space immediately after the head pipe sandwiched between the left and right main body frames, not only can the space be effectively used. However, since the position of the air vent communicating with the intake chamber and opening is near the front end of the vehicle body and also near the highest position of the vehicle, muddy soil, muddy water, etc. jumped up by wheels during traveling of the vehicle hardly jumps into the air vent,
Further, large-sized particles and the like do not reach the position of the air cleaner element, and the burden on the element is reduced. Further, the air cleaner projecting above the main body frame is covered with the fuel tank, so that the appearance is good.

Further, an air cleaner is arranged between the left and right main body frames near the head pipe, and the lower edge of the fuel tank is brought into contact with the upper surfaces of the left and right main frames via a sealing material so as to bring the air cleaner from above. Covering and making the leading edge of the lower protruding portion of the surface component of the air cleaner abut against the body frame via a sealing material, so that the fuel tank bottom wall, the surface component of the air cleaner, and the left and right main body frames A closed space is defined by the above and an air inlet of the air cleaner is opened in the closed space, and a ventilation hole which penetrates the left and right main frames and introduces outside air which is not affected by engine heat release is provided. By opening it into the closed space, the rising hot air released from the engine is blocked by the bottom wall of the air cleaner, making it difficult to enter the closed space. Since it is possible to enter only a low temperature of the outside air than the engine hot air through the left and vent extending through the main frame of the right, thereby improving the charge air charging efficiency of the engine.

According to the configuration described in claim (2), in addition to the functions and effects of the configuration described in claim (1), the left,
Since the inner wall of the right main body frame is smoothly curved and connected, it is easy to perform butt sealing with the air cleaner case, and because the outer peripheral surface and top surface of the air cleaner are formed as curved surfaces. The traveling wind that has entered the closed space smoothly flows along the surface of the air cleaner, and the generation of wind noise can be prevented.

In the configuration described in claim (3), the dead space is effectively used by disposing an air cleaner in the dead space immediately after the head pipe sandwiched between the left and right main body frames having a large vertical width. Not only that, the position of the air cleaner vent formed in the main body frame close to the head pipe is close to the front end of the body and close to the top of the body, so muddy mud, muddy water, etc. Hardly jumps into the ventilation hole, the load on the element is reduced, and in addition, the hot air discharged from the engine is blocked by the air cleaner case and is prevented from entering through the ventilation hole. Only the outside air having a relatively low temperature is sucked into the engine from the vent through the air cleaner, so that the efficiency of charging and charging the engine is improved. Jin output and the engine efficiency can be maintained at a high level.

The upper wall of the air cleaner case is located in the space between the left and right main body frames immediately after the head pipe and on the side walls of the head pipe and the left and right main body frames.
The peripheral wall and the bottom wall are integrally connected, and the head pipe and the side walls of the left and right main body frames are connected to the air cleaner /
The upper, peripheral and bottom walls of the case make up the air cleaner case, without increasing the weight of the vehicle.
In particular, the front end of the main body frame, which requires high strength and rigidity, can be sufficiently reinforced and stiffened. In addition, due to the integrated structure of the body frame and the air cleaner case,
Since the number of parts can be reduced and the number of steps for attaching the air cleaner case to the vehicle body can be reduced, productivity can be improved and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a main part of a motorcycle according to an embodiment of the present invention, FIG. 2 is an enlarged vertical sectional side view of the main part, and FIG. 3 is a main part corresponding to the line III-III in FIG. Part plan view, FIG. 4,
FIG. 5 is a plan view of an air cleaner element and an air cleaner case mounted on the motorcycle, respectively.
FIG. 7 is a diagram showing a modified example, FIG. 8 is a diagram showing a modified example, FIG. 9 is a sectional view of a main part of the IX-IX line, and FIG. 10 is a diagram showing a motorcycle according to another embodiment. FIG. 11 is a schematic cross-sectional view of a main part of the XI-XI line. DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 2 ... Head pipe, 3 ... Main body frame, 4 ... Upper wall, 5 ... Outer wall, 6 ... Vent, 7 ... Inner wall,
8 ... vent, 9 ... lower wall, 10 ... flange, 11 ... partition wall, 12 ... engine support pipe, 13 ... air cleaner, 14 ... air cleaner case, 15 ... bottom wall, 16 ... opening, 17 ... peripheral wall, 18A ...
Flange, 18B: Hanging wall, 19: Sealing material, 20: Cover, 21: Peripheral wall, 22: Top wall, 23: Suction cylinder, 24: Suction port, 25: Frame trap, 26: Element, 27: Base frame, 28 … Rubber strip, 29
... filter paper, 30 ... fuel tank, 31 ... bottom wall, 32 ... lower edge periphery,
33 ... sealing material, 34 ... lower cover, 35 ... cylinder, 36 ... motorcycle, 37 ... head pipe, 38 ... main body frame, 39 ... upper wall, 40 ... outer wall, 41 ... vent, 42 ... inner wall , 43 ... vent, 44 ... bottom wall, 45 ... engine support pipe, 46 ... air cleaner case, 47 ... peripheral wall, 48 ... top wall, 49 ... opening, 50 ... bottom wall, 51 ... opening, 52 ... drain opening , 53… Element, 54
... fuel tank, 56 ... upper body cover, FW ... front wheel, RW ... rear wheel, E ... engine, R ... radiator.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-89226 (JP, A) JP-A-60-85026 (JP, A) JP-A-63-61692 (JP, A) 42489 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A motorcycle having an engine mounted between front and rear wheels and having a pair of left and right main body frames extending to the rear of the vehicle body connected to a head pipe and extending between the left and right main body frames near the head pipe. An air cleaner is disposed on the upper surface of the left and right main frames via a sealing material so as to cover the air cleaner from above, and a lower protruding portion of a surface component of the air cleaner is provided. The leading edge is brought into contact with the vehicle body frame via a sealing material, so that a closed space is defined by the bottom wall of the fuel tank, the surface component members of the air cleaner, and the left and right main vehicle body frames. In addition, an air inlet for the air cleaner is opened at the same time, and a vent for penetrating the left and right main frames and introducing outside air unaffected by the heat released from the engine is provided in the closed space. A motorcycle characterized by being opened. 2. The main body frame is a rectangular tubular body, and the inner walls of the left and right main body frames are smoothly curved and continuous, and the outer peripheral surface of the air cleaner is formed corresponding to the curved surface. The motorcycle according to claim 1, wherein the motorcycle is curved and an upper surface of the air cleaner is formed as a curved surface. 3. A motorcycle having an engine mounted between front and rear wheels and having a pair of left and right main body frames extending to the rear of the vehicle body connected to a head pipe, the left and right main body frames immediately after the head pipe. The upper, peripheral, and bottom walls of the air cleaner case are integrally connected to the head pipe and the side walls of the left and right main body frames. An air cleaner case is constituted by the pipe, the side walls of the left and right main body frames, the upper wall, the peripheral wall and the bottom wall of the air cleaner case, and the air cleaner is taken into the side wall of the main body frame which also serves as the side wall of the air cleaner case. A motorcycle having a mouth formed.