JPH10196477A - Air cleaner of motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a filter stably by constituting a cap by an upper cap member and a lower cap member in an air cleaner of motorcycle in which the cap for taking out the filter is provided on a top face of a cleaner box. SOLUTION: An air cleaner 24 provided in an upper part of an engine of a motorcycle consists mainly of a cleaner box 25. For the cleaner box 25, a cap 26 is detachably provided on a top face 25a thereof, a ventilation cylinder 27 is formed on a bottom face 25b, and a filter 29 is fitted in such a manner that it surrounds the ventilation cylinder 27. The cap 26 consists of an upper cap member 26a and a lower cap member, and the upper cap member 26a is formed along the top face 25a and the lower cap member is formed in such a manner that it covers a top face of the filter 29. When the cap 26 is closed, a pressing flange of the lower cap member comes into contact with the top face of the filter 29 through a cushion member 32, and the filter 29 is fixed in the cleaner box 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner for a motorcycle.

[0002]

2. Description of the Related Art Vehicles such as motorcycles and automobiles are provided with an air cleaner device for purifying the intake air of an engine. FIG. 7 is a longitudinal sectional view showing an example of an air cleaner device used for a motorcycle.

[0003] This air cleaner device 100 is provided with a cylindrical filter inside a cleaner box 101 made of synthetic resin.
102 is installed vertically, and a cap 103 for taking out the filter 102 is attached to the cleaner box 101.
It is provided detachably on the upper surface 101a.

An annular frame portion 103a is formed on the lower surface of the cap 103, and the cap 103 is attached to the cleaner box 101.
When mounted on the filter, the annular frame 103a
The filter 102 is pressed against the inside of the cleaner box 101 by contact with the upper surface 102a of the second.

On the other hand, the cleaner box 101 has
A plurality of inlets 104 and outlets 105 of the same number as the number of cylinders of the engine are provided. The inlets 104 allow fresh air to flow in from the outside, and the outlets 105 are provided with intake devices (carburetor, fuel injection) for each cylinder. Device etc.). The space inside the inlet portion 104 and the space on the inner peripheral side of the filter 102 are dirty side A, and the space on the outer peripheral side of the filter is clean side B.

When the motorcycle is traveling, traveling wind from the front flows into the dirty side A of the cleaner box 101 via an air duct or the like, and this air passes through the filter 102 to remove dust and the like, and then travels to the clean side B. Inflowing and clean air is distributed to the engine cylinder from each outlet 105.

[0007]

However, in order to remove the cylindrical filter 102 from the upper surface 101a of the cleaner box 101 like the air cleaner device 100, the height of the upper surface 101a of the cleaner box 101 must be increased. If the height of the upper surface 102a of the filter 102 is not substantially equal, the length of the annular frame portion 103a of the cap 103 becomes long and rigidity is insufficient, so that the filter 102 cannot be stably pressed, and as a result, traveling vibrations Filter by
There is concern that 102 will be dropped.

For this reason, the upper surface of the cleaner box 101
A method of inclining the filter 101a with respect to the center axis of the filter 102 cannot be adopted, and there are great restrictions on the design of the cleaner box 101. In addition, since the cleaner box 101 is accommodated in a recess formed on the lower surface of the fuel tank, the shape design of the fuel tank may be restricted.

Furthermore, the upper surface 10 of the cleaner box 101
Since the height of 1a cannot be higher than the upper surface 102a of the filter 102, the volume of the cleaner box 101 is limited. For example, when the distance between the outlets 105 opening to the clean side B is short, each outlet
Intake interference may occur between the 105 and the intake efficiency may be degraded.

The present invention has been made to solve such a problem, and even in a configuration in which a cylindrical filter can be taken out from the upper surface of a cleaner box, the filter is stably fixed in the cleaner box. It is another object of the present invention to provide an air cleaner device for a motorcycle, which has a large degree of freedom in the design of the cleaner box and can secure a large volume of the cleaner box.

[0011]

In order to achieve the above object, an air cleaner device for a motorcycle according to the present invention comprises:
As described in claim 1, in a motorcycle air cleaner device, a filter is installed inside the cleaner box, and a cap for taking out the filter is detachably provided on an upper surface of the cleaner box.
The cap is formed by combining an upper cap member formed along the upper surface of the cleaner box and a lower cap member formed to abut on the upper surface of the filter to fix the filter in the cleaner box. Features.

Further, in the air cleaner device for a motorcycle according to the present invention, a gap is provided between the upper cap member and the lower cap member to make the cap a hollow structure, and the hollow portion is provided. Was communicated with the internal space of the cleaner box.

According to the first aspect of the present invention, a lower cap member for pressing the upper surface of the filter against the upper cap member along the upper surface of the cleaner box can be provided at a lower position. Because the relative angle between the upper cap member and the lower cap member can be set freely, for example, the upper surface of the cleaner box is higher than the upper surface of the filter,
Even if the filter is inclined with respect to the upper surface of the filter, the lower cap member can be firmly brought into close contact with the upper surface of the filter independently of that, and the filter can be stably pressed.
In addition, the degree of freedom in designing the cleaner box can be greatly improved.

Further, if the air cleaner device for a motorcycle is constructed as in claim 2, the internal volume of the cleaner box is increased by the hollow portion between the upper cap member and the lower cap member, so that the interference of intake air and the like is reduced. The occurrence of adverse effects can be prevented.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a left side view showing an example of a motorcycle to which the air cleaner device according to the present invention can be applied, and FIG. 2 is a plan view of the motorcycle.
FIG. 3 is an enlarged left side view of the vicinity of the frontal part of the motorcycle.

The motorcycle 1 is of a road sports type in which a front part is covered with a streamlined cowling 2.
An engine 4 is suspended from the front half of the body frame 3. The engine 4 is a two-cylinder engine in which two cylinders 5F and 5R are arranged in a V-shape as viewed from the side as shown in FIG.

A front fork 7 supporting a front wheel 6 is rotatable left and right together with a handlebar 8 and a brake device 9 on a head pipe 3a (see FIG. 3) provided on the front head of the body frame 3. And a pivot shaft erected in the vehicle width direction at the lower center of the body frame 3
A swing arm 13 supporting a rear wheel 12 is rotatably supported up and down on the rear wheel 11, and the power of the engine 4 is transmitted to the rear wheel 12 via a chain 14.

Further, a fuel tank 15 is provided in the upper part of the front half of the vehicle body frame 3, and subsequently, a seat 16 and a pillion seat 17 are provided. Reference numeral 18 denotes an exhaust muffler. Further, the cowling 2 is provided with a transparent window screen 20, a headlamp 21, and the like, and air intakes 22, 22, which open forward, are provided on the left and right of the headlamp 21.

The air cleaner device 24 according to the present invention is provided above the engine 4. The air cleaner device 24 mainly includes a cleaner box 25 made of hard synthetic resin and installed above the engine 4. As shown in FIG. 3, a concave portion 15a which is concaved upward is formed on the lower surface of the fuel tank 15, and the cleaner box 25 is housed in the concave portion 15a.

FIG. 4 is a longitudinal sectional view of the air cleaner device 24. The cleaner box 25 has a structure that can be divided vertically, for example, along a dividing line C, and a cap 26 is detachably provided on an upper surface 25a of the cleaner box 25.

The bottom surface 25b of the cleaner box 25 is formed with a ventilation tube 27 extending vertically so as to penetrate a substantially central portion thereof.
A fitting frame 28 is formed on the upper surface side of the fitting frame 25b.
A cylindrical filter 29 is fitted to the outer periphery of the tube 28 from above.
In other words, the cylindrical filter 29 is provided to stand on the bottom surface 25b of the cleaner box 25. In addition, as shown in FIG. 5, the filter 29 is located almost directly above the crankshaft 31 of the engine 4.

The upper portion of the filter 29 is pressed from above by the cap 26, whereby the filter 29 is fixed in the cleaner box 25. By removing the cap 26, the filter 29 can be taken out of the cleaner box 25, and the filter 29 can be replaced, washed, and the like. In addition,
Top and bottom of filter 29 and bottom 25 of cleaner box 25
Between the b and the cap 26, donut-shaped cushion members 32, 33 are interposed.

The inner peripheral side of the filter 29 is a dirty side A and the outer peripheral side is a clean side B. An inlet 35 is provided on the dirty side A side, and outlets 36F and 36R are provided on the clean side B side.

The inlet portion 35 is formed in the shape of a bottomed cylinder using the same hard synthetic resin as the cleaner box 25, and the filter 29 on the bottom surface 25b of the cleaner box 25 is formed.
Is installed so as to extend downward from the portion where the is installed, that is, the portion of the ventilation tube 27. Connection holes 37, 37 (see FIG. 3) are formed in the lower left and right side surfaces of the inlet portion 35.

The inlet 35 is located between the front and rear cylinders 5F and 5R of the engine 4 because the filter 29 is located right above the crankshaft 31 of the engine 4. The engine 4 is located inside the inlet 35.
A valve device 38 which is operated by the intake negative pressure or the like is provided, so that the passage area of the ventilation tube 27 is always adjusted to an optimum size by the valve device 38.

On the other hand, two outlets 36F and 36R are provided in front of and behind the filter 29 with the filter 29 interposed therebetween. These two outlet portions 36F and 36R are formed in a short cylindrical shape using a material such as rubber which is softer than the cleaner box 25, and the bottom surface 25 of the cleaner box 25 is formed.
B is fitted air-tightly into circular holes 39, 39 formed in b.

The front and rear outlets 36F and 36R are respectively connected to the front and rear cylinders 5 of the engine 4 as shown in FIG.
F, 5R are connected to the intake devices 41F, 41R. Here, a fuel injection type throttle body is used as the intake devices 41F and 41R, but an intake device such as a carburetor may be used.

By the way, as described above, the motorcycle 1
Tubular air ducts 42L, 42R are connected to a pair of left and right air intakes 22, 22 provided in a streamlined cowling 2 covering the frontal part of the vehicle. These air ducts 42
L, 42R extend rearward through the inside of the cowling 2, and the ends of the air ducts 42L, 42R are curved inward, respectively, and are connected to the left and right connection holes 37, 37 of the inlet 35.

As shown in FIG. 3, the front half of the body frame 3 is formed by combining a plurality of pipe members 3b to 3e, and the end portions of the air ducts 42L and 42R are connected to these pipe members 3b to 3e. Between the inlet section
It is connected to 35 connection holes 37,37. Each air duct 42
The chamber 43 provided near the front ends of the air ducts L and 42R collects and removes moisture and the like contained in the air passing through the air ducts 42L and 42R.

FIG. 6 shows the cap of the cleaner box 25.
26 is a longitudinal sectional view of FIG. As shown here, the cap 26 is configured by combining an upper cap member 26a and a lower cap member 26b.

The upper cap member 26a is formed along the upper surface 25a of the cleaner box 25, and a downwardly extending convex portion 45 is formed at the center of the lower surface thereof, for example, in a wall shape, and surrounds the convex portion 45. Thus, the annular wall 46 is formed. For example, an opening 47 is provided on the front surface of the annular wall 46. Note that a plurality of engagement protrusions are provided at the tip of the convex portion 45.
48 are formed. Further, the upper cap member 26
Several reinforcing ribs 49 are formed on the lower surface of a.

On the other hand, the lower cap member 26b is formed so as to cover the upper surface 29a of the filter 29, and the central portion thereof is formed one step higher than the surroundings to form the joining surface 51.
A flange-shaped pressing flange 52 is formed around the joint surface 51, and a fitting frame 53 is formed on the lower surface. A concave portion 54 is formed at the center of the joining surface 51, and a plurality of small holes 55 are formed at the bottom thereof. Further, an annular groove 56 is formed around the joint surface 51.

The convex portion 45 and the annular wall 46 of the upper cap member 26a are fitted into the concave portion 54 and the annular groove 56 of the lower cap member 26b, respectively. Then, the engagement projection at the tip of the projection 45
When the projection 48 is inserted into the small hole 55 in the recess 54 and crushed, the engagement projection 48 is transformed from a rod shape shown by a two-dot chain line to a hemisphere shape shown by a solid line in FIG. And the lower cap member 26b are integrated without being separated.

When the filter 29 is installed in the cleaner box 25 and the cap 26 is closed, the pressing flange 52 of the lower cap member 26b abuts on the upper surface 29a of the filter 29 via the cushion member 32, and the filter 29 is Fixed within 25. At this time, the fitting frame 53 of the lower cap member 26b is tightly fitted into the concave portion 29b formed on the upper surface 29a of the filter 29, and
The upper, lower, front, rear, left and right movements are restricted.

A plurality of fastening pieces 57 are provided on the front and rear edges of the cap 26.
These fastening pieces 57 are fastened to the fastening pedestal 59 of the cleaner box 25 with screws 58 as shown in FIG. 4, and the cap 26 is fixed to the cleaner box 25.

Since a gap is provided between the upper cap member 26a and the lower cap member 26b constituting the cap 26, the cap 26 has a hollow structure, and the hollow portion 26c is formed in the upper cap member 26a.
Communicates with the internal space of the cleaner box 25 via an opening 47 provided in the annular wall 46 of the first embodiment. In this embodiment, the hollow portion 26c communicates with the clean side B.

The air cleaner device 24 is configured as described above. When the motorcycle 1 travels, the traveling wind from the front as shown by arrows in FIG.
Inlet part of cleaner box 25 through L, 42R
Flow into 35. The traveling wind first enters the dirty side A as fresh air, and then enters the clean side B after passing through the filter 29 to remove dust and the like. Then, clean air is distributed to the cylinders 5F, 5R of the engine 4 from the front and rear outlets 36F, 36R.

The air cleaner device constructed as described above
24, the cap 26 has a structure in which an upper cap member 26a and a lower cap member 26b are combined, and the upper cap member 26a is
Since the lower cap member 26b is formed so as to abut the upper surface 29a of the filter 29 and presses the filter 29, the lower cap member 26b is formed along the upper surface 25a of the filter 29. Member 26
b can be provided at a lower position, and the relative angle between the upper cap member 26a and the lower cap member 26b can be freely set.

Therefore, for example, as shown in FIG. 3, the upper surface of the concave portion 15a formed in the fuel tank 15 is inclined, and the upper surface 25a of the cleaner box 25 is The upper surface 25a of the cleaner box 25 is higher than the upper surface 29a of the filter 29,
Irrespective of this configuration, the lower cap member 26b may be inclined relative to the upper surface 29a of the filter 29.
The filter 29 can be stably fixed in the cleaner box 25 by securely adhering to the filter 29a. Moreover, the degree of freedom in designing the cleaner box 25 can be greatly improved.

Further, since the hollow portion 26c provided between the upper cap member 26a and the lower cap member 26b communicates with the clean side B through the opening 47, the volume of the clean side B is increased accordingly. As a result, adverse effects such as the occurrence of intake interference between the front and rear outlets 36F and 36R are less likely to occur. At the same time, the weight of the cap 26 is reduced by the hollow portion 26c.

The basic structure of the air cleaner device according to the present invention is not limited to motorcycles, but can be applied to air cleaner devices for all vehicles driven by engines, ships, etc., and general-purpose engines.

[0042]

As described above, in the motorcycle air cleaner device according to the present invention, the upper cap member formed so that the cap detachably provided on the upper surface of the cleaner box is formed along the upper surface of the cleaner box. And a lower cap member formed so as to abut on the upper surface of the filter to fix the filter in the cleaner box.

According to the present invention, the lower cap member for pressing the upper surface of the filter with respect to the upper cap member along the upper surface of the cleaner box can be provided at a low position, and the relative angle between the upper cap member and the lower cap member can be reduced. Because it can be set freely, in the case of a configuration in which the cylindrical filter can be taken out from the upper surface of the cleaner box, for example, even if the upper surface of the cleaner box is higher than the upper surface of the filter or is inclined with respect to the upper surface of the filter Irrespective of this, the lower cap member can be securely brought into close contact with the upper surface of the filter to stably press the filter, and the degree of freedom in designing the cleaner box can be increased.

Further, in the motorcycle air cleaner device according to the present invention, a gap is provided between the upper cap member and the lower cap member so that the cap has a hollow structure.
Since the hollow portion communicates with the internal space of the cleaner box, the internal volume of the cleaner box can be increased by the amount of the hollow portion, and adverse effects such as air intake interference can be prevented.

[Brief description of the drawings]

FIG. 1 is a left side view showing an example of a motorcycle to which an air cleaner device according to the present invention can be applied.

FIG. 2 is a plan view of the motorcycle.

FIG. 3 is an enlarged left side view of the vicinity of the frontal head of the motorcycle.

FIG. 4 is a longitudinal sectional view of an air cleaner device showing one embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of an air cleaner device, an engine, and a cowling.

FIG. 6 is a longitudinal sectional view of a cap.

FIG. 7 is a longitudinal sectional view of an air cleaner device showing a conventional technique.

[Explanation of symbols]

 1 Motorcycle 24 Air cleaner device 25 Cleaner box 25a Upper surface of cleaner box 26 Cap 26a Upper cap member 26b Lower cap member 26c Hollow part of cap 29 Filter 29a Upper surface of filter A Dirty side B Clean side

Claims (2)

[Claims] 1. A motorcycle air cleaner device in which a filter 29 is provided inside a cleaner box 25, and a cap 26 for taking out the filter 29 is detachably provided on an upper surface 25a of the cleaner box 25. An upper cap member 26a formed along the upper surface 25a of the cleaner box 25, and a lower cap member 26b formed to abut the upper surface 29a of the filter 29 to fix the filter 29 in the cleaner box 25. An air cleaner device 24 for a motorcycle, wherein the air cleaner device 24 is constituted by combining the above. 2. The apparatus according to claim 1, wherein a gap is provided between the upper cap member 26a and the lower cap member 26b so that the cap 26 has a hollow structure, and the hollow portion 26c communicates with the internal space of the cleaner box 25. Motorcycle air cleaner device.