JP3395946B2 - Scooter type vehicle equipped with air cleaner device and unit swing type power unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scooter type vehicle equipped with an air cleaner device and a unit swing type power unit.

[0002]

2. Description of the Related Art As an air cleaner device, for example, Japanese Utility Model Publication No. 6-14057 "Air Cleaner Device" is known. The above technique prevents relatively large dust contained in the intake air from adhering to the air filter element in the cleaner chamber. As shown in FIG. 1 of the publication, the air cleaner body 1 and the air cleaner body 1 are prevented.
A first suction chamber 2, a second suction chamber 3, and a cleaner chamber 4, which are formed by partitioning
Communication duct 1 communicating from the first suction chamber 2 to the second suction chamber 3
0, and the element 15 provided between the second suction chamber 3 and the cleaner chamber 4.

[0003]

In the above technique, the first suction chamber 2, the second suction chamber 3 and the cleaner chamber 4 are arranged in this order in the air cleaner body 1, and the first suction chamber 2 and the second suction port are arranged. Since the communication duct 10 is provided between the communication duct 1 and
There is an inconvenience that the length of 0 cannot be sufficiently secured and it is difficult to reduce intake noise. Further, since this air cleaner device has a relatively large height, it is disadvantageous that, for example, when it is mounted on the upper part of the power unit, the vertical stroke of the power unit cannot be sufficiently obtained.

Therefore, an object of the present invention is to make it possible to secure the entire length of the communication pipe provided between the two air expansion chambers and the outside air suction pipe for guiding outside air to the expansion chamber without increasing the size of the air cleaner case. To provide an air cleaner device that can easily reduce intake noise and secure the area of the element to obtain the required cleaning performance. When installed on the upper part of the power unit, the vertical stroke of the power unit is sufficient. Another object of the present invention is to provide a scooter type vehicle equipped with a unit swing type power unit that can be secured.

[0005]

In order to achieve the above object, the first aspect of the present invention is to arrange the communication pipe and the outside air suction pipe substantially parallel to the element, and to penetrate the outside air suction pipe through the second chamber. It was arranged in the form of. The area of the element and the total length of the communication pipe and the outside air suction pipe can be secured without increasing the size of the air cleaner case, and the cleaning performance can be improved and the intake noise can be reduced.

In the second aspect, the first partition wall is integrally formed with the communication pipe. The number of parts can be reduced and the assemblability can be improved.

According to the third aspect, the air cleaner device is arranged above the power unit, and the element is arranged in the longitudinal direction of the vehicle body, whereby the cleaner case is made sufficiently long.
The vertical stroke of the power unit can be sufficiently secured, the element area can be increased, and the cleaning ability can be enhanced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is a side view of a scooter type vehicle according to the present invention. A scooter type vehicle 1 (hereinafter referred to as "scooter 1") is a cradle type vehicle body frame 2 which is a vehicle body.
A front fork 4 attached to the head pipe 3 of the body frame 2, a front wheel 5 and a front fender 6 attached to the front fork 4, a handle 7 connected to the front fork 4, and each pipe of the body frame 2. The fuel tank 8, the reserve tank 9 for the radiator and the radiator 10 arranged in the enclosed cradle space, the power unit 12 arranged at the rear of the cradle space and provided with the water cooling engine 11 at the front portion, and the front portion of the power unit 12 are arranged. A link mechanism 13 for attaching to the body frame 2, a rear cushion 14 for suspending the rear end of the power unit 12 on the body frame 2,
The power unit 12 includes a rear wheel 15 attached to a rear portion thereof, a seat 16 arranged on an upper rear portion of the vehicle body frame 2, and a body cover 17 covering the vehicle body frame 2.

The body cover 17 includes a front cover 21 that covers the front portion of the head pipe 3 and the upper portion of the front wheel 5, and an inner cover 22 that covers the rear portion of the front cover 21.
The left and right step floors 23 (only the front side is shown in this figure. The same applies to the following) as low-floor footrests on which the driver's feet are placed, and left and right floor skirts extended downward from the outer edges of these step floors 23. 24, an under cover 25 that covers between the lower edges of the floor skirts 24, a center cover 26 that extends rearward from the inner cover 22 and covers the longitudinal center of the vehicle body frame 2, and the center cover 2
6, side covers 27 extending rearward from 6 to cover both rear side surfaces of the body frame 2, left and right lower side covers 28 extending downward from outer edges of the side covers 27, and rear side covers 28 of the vehicle body frame 2 behind the lower side covers 28. The rear center cover 29 covers a lower rear end and a rear upper cover 30 covers an upper rear end of the vehicle body frame 2 above the rear center cover 29.

The handle 7 includes a handle cover 33 which covers the handle 7 and a handle 7 above the front cover 21.
A transparent wind screen 34 fixed to the above, and a screen garnish 35 as a cover member provided on the lower front portion of the wind screen 34. The inner cover 22 is provided with leg shields 22a on both sides for covering the front of the driver's legs. Since the rear cushion 14 is arranged almost vertically to the ground, the space in front of the rear cushion 14 becomes large, and in this space,
By disposing the large-sized air cleaner 46, the cleaning ability of the air cleaner 46 can be enhanced and the intake noise can be reduced. In the figure, 41 is a headlamp, 42 is a turn signal,
43 is a refueling lid, 44 is a spark plug inspection lid,
Reference numeral 45 is a main stand, 46 is an air cleaner that is an air cleaner device, 47 is a rear grip, 48 is a tail lamp, and 49 is a rear fender.

FIG. 2 is a side view of the air cleaner according to the present invention. The air cleaner 46 includes an air cleaner case main body 51 and an air cleaner case 53 composed of a cover 52 covering the side surface of the air cleaner case main body 51, and an air cleaner case main body 51. An intake pipe 54 leading to a carburetor not shown, and a tube 55 with a plug for collecting the oil component of the blow-by introduced into the air cleaner case 53
And a drain pipe 56 for discharging dust and water in the air cleaner case 53 to the outside. 57,5
8, 59 are mounting portions for mounting to the body frame,
B1 ... (... indicates a plurality of pieces; the same applies hereinafter) are screws for attaching the cover 52 to the air cleaner case main body 51.

The air cleaner case 53 has a suction portion 61a for introducing outside air into the outer wall of the air cleaner case 53.
Is provided with an outside air suction pipe 61 provided inside the air cleaner case 53, and a communication pipe 62 disposed below the outside air suction pipe 61.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2. The air cleaner case 53 has a first expansion chamber 63 for taking in the outside air from the outside air suction pipe 61 and expanding the same, and the first expansion chamber 63.
The second expansion chamber 64 that takes in the air of the second expansion chamber 64 through the communication pipe 62 and expands it again, and the cleaner chamber 66 that takes in the air of the second expansion chamber 64 through the flat air cleaner element 65. In addition, 51a is a clean air discharge port.

The outside air suction pipe 61 is composed of a U-shaped suction portion 61a in plan view and a straight pipe portion 61b. The suction portion 61a has a suction port 61c facing rearward, and the suction portion 61a is covered with a cover 5.
It is fitted with 2. First and second expansion chambers 63, 64
The space is partitioned by a partition wall 67, which is a first partition formed integrally with the communication pipe 62. The partition wall 67 fixes the straight pipe portion 61b of the outside air suction pipe 61. The air cleaner element 65 includes a base portion 65a that is a second partition wall for attaching to the air cleaner case body 51, and a filter portion 65b that traps dust.

As described above, the communication pipe 62 and the outside air suction pipe 61 are arranged substantially parallel to the air cleaner element 65, and the outside air suction pipe 61 is arranged so as to pass through the second expansion chamber 64. The area of the air cleaner element 65 and the total length of the communication pipe 62 and the outside air suction pipe 61 can be ensured without increasing the size of 53, and the cleaning performance can be improved and the intake noise can be reduced. Further, since the suction port 61c is arranged inside the lower side cover 28, it is possible to prevent the influence of traveling wind and the intrusion of dust and the like into the suction port 61c.

FIG. 4 is a perspective view of a communication pipe and a partition wall according to the present invention. The partition wall 67 is provided with a protrusion 67b at an intermediate portion of a side 67a, and the communication pipe 62 penetrates below the protrusion 67b. As described above, the fitting hole 67c for fitting the outside air suction pipe 61 (see FIG. 3) is formed above the communication pipe 62. 67d is a protrusion 67
The vertical groove 67d is a vertical groove formed on the side 67a on the b side.
The upright portion 52 formed on the inner surface of the cover 52 (see FIG. 3)
a (see FIG. 3) is fitted. 67e and 67e are protrusions 67
It is a protrusion formed on the side 67f facing the side 67a on the b side, and is a portion that abuts on the base portion 65a of the air cleaner element 65 as shown in FIG.

In FIG. 4, the communication pipe 62 has a fixing portion 62b for fixing the communication pipe 62 to the cover 52 (see FIG. 3) at the lower rear end, and a fixing hole 62c formed in the fixing portion 62b. Cylindrical portion 52b protruding from the inner surface of the cover 52
(See FIG. 3). The outside air suction pipe 62 and the partition wall 6
A communication pipe member 68, which is an integrally molded body, is configured with 7.

If this communicating pipe member 68 is made of a flexible material such as rubber or soft resin, it is suitable for assembly and vibration isolation. By integrally molding the partition wall 67 and the communication pipe 62 in this manner, the number of parts can be reduced and the assembling property can be improved.

FIG. 5 is a side view showing a state in which the cover of the air cleaner according to the present invention is removed. The filter portion 65b of the air cleaner element 65 has a second expansion chamber 64 (see FIG. 3).
(See FIG. 3) and the cleaner chamber 66 (see FIG. 3).
By increasing the size so as to occupy most of the partition wall, the cleaning ability for catching dust can be enhanced.

Base portion 65a of the air cleaner element 65
Are mounting holes 65d, 65d, 65 provided in the edge portion 65c.
e, 65e and a mounting hole 65f mounted on the rear portion.
The mounting holes 65d, 65d, and 65f are for tightening together when the cover 52 (see FIG. 3) is attached to the air cleaner case main body 51 with the screw B1 (see FIG. 1), and the mounting holes 65e and 65e are the air cleaner case. It is for fixing the air cleaner element 65 directly to the main body 51 with a screw (not shown).

Here, 65 g is the partition wall 67 shown in FIG.
The projections 67e, 67e of the first and second expansion chambers 63,
Flat part for sealing between 64 (see FIG. 3), 51b
Is a mounting hole for directly mounting the cover 52 to the air cleaner case body 51 with the screw B1 (see FIG. 2).

FIG. 6 is a vertical cross-sectional view of an outside air suction pipe and a communication pipe of the air cleaner according to the present invention.
From the outside of the air cleaner 46 through the inside of the second expansion chamber 64,
It is a pipe reaching the first expansion chamber 63, and the first expansion chamber 63 communicates with the outside through the outside air suction pipe 61. The communication pipe 62 is
The pipe extends from the first expansion chamber 63 to the second expansion chamber 64.

FIG. 7 is an assembly procedure diagram (first half) of the air cleaner case according to the present invention, which will be described in order. First, the straight pipe portion 61b of the outside air suction pipe 61 is fitted to the fitting portion 61 with the partition wall 67.
d is formed, the fitting hole 67c of the partition wall 67 integrated with the communication pipe 62 is fitted into the fitting portion 61d, and the partition wall 67 and the communication pipe 62 are attached to the outside air suction pipe 61. Next, the outside air suction pipe 6 is inserted into the fitting hole 52c formed on the side surface of the cover 52.
1 through the suction portion 61a, and the suction portion 61a through the fitting hole 52c.
The fitting portion 61e formed in the above is fitted and the assembly of the outside air suction pipe 61, the partition wall 67 and the communication pipe 62 is attached to the cover 52.

FIG. 8 is an assembly procedure diagram (second half) of the air cleaner case according to the present invention, which will be described in order. First, the outer peripheral groove 51 formed on the periphery of the air cleaner case main body 51.
An outer peripheral projection 65h formed at the periphery of the air cleaner element 65 is inserted into a, and screws are inserted through the mounting holes 65e and 65e (see FIG. 5) to fix the air cleaner element 65 to the air cleaner case body 51.

Next, the outer peripheral groove 5 formed on the peripheral edge of the air cleaner case main body 51 and on the peripheral edge of the cover 52 assembled in FIG.
2d is fitted, and the cover 52 is attached to the air cleaner case body 51 with screws B1 ... (See FIG. 1). This completes the assembly of the air cleaner 46.

The operation of the air cleaner 46 described above will be described below. FIG. 9 is a cross-sectional view for explaining the air flow of the air cleaner according to the present invention, in which (a) is a plane cross-section (FIG.
And (b) show a vertical section (similar to FIG. 6). The description will be made in the order of the numbers attached to the arrows indicating the flow of air in the drawing. In (a), the air enters the outside air intake pipe 61 through the intake port 61c, and travels backward through the outside air intake pipe 61,
From the rear part of the outside air suction pipe 61 to the inside of the first expansion chamber 63.

In (b), the air is the first expansion chamber 6
3 enters the communication pipe 62 and flows from the communication pipe 62 to the second expansion chamber 64. In (a), when the air in the second expansion chamber 64 passes through the filter portion 65b, dust is removed and the air is cleaned and reaches the cleaner chamber 66.
4 and is sent into the engine through a carburetor (not shown).

As shown in FIG. 1, the air cleaner 46
Is disposed above the power unit 12, and the air cleaner element 65 (see FIG. 3) is disposed in the longitudinal direction (front-back direction) of the vehicle body frame 2 to sufficiently lengthen the air cleaner case 53 (see FIG. 3). A sufficient up and down stroke of 12 can be secured, the area of the air cleaner element 65 can be increased, and the cleaning performance can be improved. Further, as shown in FIG. 3, the suction portion 61 of the outside air suction pipe 61 is
By making a a U-shaped, the outside air intake pipe 61 can be lengthened, and intake noise can be easily reduced.

Although the outside air suction pipe 61 is provided above the communication pipe 62 in the embodiment of the present invention, the outside air suction pipe 61 may be provided above the communication pipe 62. If you do this,
The relatively heavy dust, rainwater, and the like introduced from the outside air suction pipe 61 fall to the bottom of the first expansion chamber 63, and the outside air suction pipe 61
It is possible to make it difficult to enter the communication pipe 62 above.

[0030]

The present invention has the following effects due to the above configuration. In the air cleaner device according to claim 1, the communication pipe and the outside air suction pipe are arranged substantially parallel to the element, and the outside air suction pipe is arranged so as to penetrate the second chamber.
It is possible to secure the area of the element and the total length of the communication pipe and the outside air suction pipe without increasing the size of the air cleaner case.
It is possible to improve the cleaning ability and reduce intake noise.

In the air cleaner device of the second aspect, since the first partition wall is integrally formed with the communication pipe, the number of parts can be reduced and the assembling property can be improved.

In the scooter type vehicle equipped with the unit swing type power unit of claim 3, since the air cleaner device is arranged above the power unit and the element is arranged in the longitudinal direction of the vehicle body, the cleaner case is made sufficiently long. It is possible to secure a sufficient up and down stroke and to increase the element area, thereby enhancing the cleaning ability.

[Brief description of drawings]

FIG. 1 is a side view of a scooter type vehicle according to the present invention.

FIG. 2 is a side view of the air cleaner according to the present invention.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a perspective view of a communication pipe and a partition wall according to the present invention.

FIG. 5 is a side view showing a state in which a cover of the air cleaner according to the present invention is removed.

FIG. 6 is a vertical cross-sectional view of an outside air suction pipe and a communication pipe of an air cleaner according to the present invention.

FIG. 7 is an assembly procedure diagram of the air cleaner case according to the present invention (first half)

FIG. 8 is an assembly procedure diagram of the air cleaner case according to the present invention (second half)

FIG. 9 is a cross-sectional view illustrating an air flow of an air cleaner according to the present invention.

[Explanation of symbols]

1 ... scooter type vehicle, 2 ... vehicle body (body frame), 12
... power unit, 46 ... air cleaner device (air cleaner), 53 ... cleaner case (air cleaner case), 61 ... outside air suction pipe, 62 ... communication pipe, 63 ... first chamber (first expansion chamber), 64 ... second chamber (first chamber) 2 expansion chambers), 65 ...
Element (air cleaner element), 66 ... Third chamber (cleaner chamber), 67 ... First partition wall (partition wall).

Front Page Continuation (72) Inventor Tomohiko Akashi 1-4-1 Chuo, Wako-shi, Saitama, Honda R & D Co., Ltd. (56) Reference JP-A-7-71333 (JP, A) JP-A-61-106969 (JP, A) JP 62-178767 (JP, A) JP 7-324656 (JP, A) Actually open 4-71394 (JP, U) Actually open 61-126073 (JP, U) (JP 58) Fields investigated (Int.Cl. ⁷ , DB name) F02M 35/14-35/16 B62M 7/02

Claims (3)

(57) [Claims] 1. A first chamber for taking in and expanding the outside air through a sufficiently long outside air suction pipe, and a second chamber for taking in the air in the first chamber through a communication pipe provided in the first partition wall and expanding it again.
An air cleaner device comprising a chamber, a third chamber for taking in air in the second chamber via a flat plate-shaped element attached to a second partition, and a clean air discharge port opened in the third chamber, wherein the communication pipe is provided. An air cleaner device characterized in that the outside air suction pipe is arranged substantially parallel to the element, and the outside air suction pipe is arranged so as to penetrate the second chamber. 2. The air cleaner device according to claim 1, wherein the first partition wall is integrally formed with the communication pipe. 3. A unit swing characterized in that the air cleaner device according to claim 1 or 2 is arranged above a power unit and the element is arranged in the longitudinal direction of the vehicle body to make the cleaner case sufficiently long. Scooter type vehicle equipped with power unit.