JP3466043B2 - Air cleaner device for vehicle engine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner device used for a vehicle engine such as a motorcycle.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 8-216958 discloses an air cleaner device which divides the inside of the air cleaner case into two chambers by inserting and mounting a flat air cleaner element into the air cleaner case from above.

This air cleaner element has a cap integrally formed with an intake duct after being inserted from an opening formed in the upper portion of the air cleaner case into an insertion recess previously provided inside the air cleaner case. It is fixed by covering it with and fixing it with screws.

[0004]

In the structure of the conventional example described above, when fixing the air cleaner element,
When replacing the air cleaner element, the cap must be screwed to the air cleaner case.
It is necessary to remove the cap with a tool each time.
Therefore, it is desired to improve the maintainability by making it possible to replace the air cleaner element without using a tool.

[0005]

In order to solve the above problems, an air cleaner device for a vehicle engine according to the present invention comprises:
The air cleaner case is divided into two rooms, a dirty room and a clean room, by a plate-shaped air cleaner element.
In an air cleaner device that connects the clean room to the intake passage of the engine and connects the dirty room to the atmosphere,
The air cleaner case is a lower case with an open top.
And an upper case that covers this opening.
Open the opening for entering and exiting the air cleaner element.
Install this opening on the air cleaner case.
It can be covered with an air cleaner cover
At the boundary between the dirty room and the clean room in the upper and lower cases , the air cleaner element
The air cleaner et a while projecting the periphery of its by rotating the frame shape of the sealing wall continuous to support through a seal having a resilient, to seal the sealing wall
Contact one side of the peripheral edge of the
By engaging with a locking piece provided on the base,
The feature is that the periphery of the cleaner element is sealed and fixed .

At this time, in the peripheral portion of the air cleaner element, an engaging portion for engaging with the locking piece is provided on one side facing the other side, and a fulcrum portion serving as a fulcrum when the air cleaner element is pivotally formed on the other side. You can also do it.

It is also possible to provide an opening in the air cleaner case that allows the air cleaner element to be taken in and out freely, and attach an air cleaner cover that covers the opening to the air cleaner case by engaging means so as to be disengageable.

Further, the engaging means of the air cleaner cover with respect to the air cleaner case may be configured to be disengageable when the upper case and the locking piece are in an incompletely engaged state.

[0009]

By inserting the air cleaner element into the air cleaner case and rotating the air cleaner element , the peripheral portion of the peripheral portion of the air cleaner element is rotated .
Press one side against the seal provided on the seal wall, the other
The locking piece that is previously provided on the upper case can be engaged with the surface .
By this, the air cleaner element can be sealed and fixed to the air cleaner case side, and conversely, the removal can be easily done by releasing the engagement, so that the air cleaner element can be replaced without using a tool and the maintainability is remarkably improved.

Moreover, since the locking piece is provided integrally with the upper case, the number of parts can be reduced, so that the cost can be reduced and the assembling can be facilitated.

At this time, if an engaging portion for engaging with the locking piece is provided on one side of the peripheral portion of the air cleaner element that faces the other side and a fulcrum portion is formed on the other side, the fulcrum portion contacts the air cleaner case. Since the air cleaner element can be brought into contact with each other and can be used as a fulcrum of rotation of the air cleaner element, the engagement operation with the engagement piece when fixing the air cleaner element becomes easy.

Further, when the upper case is provided with an opening for allowing the air cleaner element to be taken in and out, and an air cleaner cover for covering the opening is detachably attached to the upper case by engaging means, only the air cleaner element is provided. In addition, the air cleaner cover can be attached and removed without using any tools, further improving maintenance.

Further, if the engaging means for the upper case of the air cleaner cover is constructed so as to be disengageable when the air cleaner element and the locking piece are in an incompletely engaged state. If the air cleaner element is improperly set, it can be detected immediately when the air cleaner cover is attached, so that the air cleaner element can be set accurately, and the reliability and reliability of the set are improved.

[0014]

1 is a schematic cross-sectional view for explaining replacement of an air cleaner element, FIG. 2 is a side view of main parts of an off-road motorcycle equipped with this air cleaner device, and FIG. 3 is an air cleaner. 4 is a partially cutaway side view of the entire device, FIG. 4 is a plan view thereof, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, and FIG. 6 is a sectional view of a case cover taken along line 6-6 of FIG. 7, FIG. 7 is a side view of the air cleaner element, and FIG. 8 is a view showing the air cleaner element from the direction of the arrow X in FIG. 7.

First, in FIG. 2, the vehicle body frame is provided with a head pipe 1, a main pipe 2, a front down tube 3, a seat rail 4 and a rear stay 6.

The main pipe 2 is a single pipe member extending obliquely downward and rearward from the head pipe 1 along the center of the vehicle body. The main pipe 2 supports the fuel tank T and further lowers the intermediate portion to the latter half portion thereof. The pivot frame portion 5 is bent and extends.

The front down tube 3 is also a pipe member extending downward from the head pipe 1 in a space below the main pipe 2 substantially in parallel with the pivot frame portion 5.

The seat rails 4 are a pair of left and right pipe members for supporting the seat S, and extend rearward slightly upward from the middle portion of the main pipe 2.

The rear stays 6 are a pair of left and right pipe members that extend obliquely upward from an intermediate portion of the pivot frame portion 5 and are joined to the seat rail 4.

This body frame has a diamond frame structure, and includes the lower end portion of the front down tube 3 and each mount portion 7a, 7b in the pivot frame portion 5,
An air-cooled engine 8 is supported by 7c.

The air-cooled engine 8 takes in air from an air cleaner device 10 supported between a seat rail 4 and a rear stay 6 via a carburetor 9 and exhausts it from an exhaust pipe 11, and at the same time a rear wheel via a chain 12. 13 is driven.

The rear wheel 13 is supported by a rear end of a rear arm 14 whose front end is swingably supported by the pivot frame portion 5, and is suspended by a shock absorber 15 on the vehicle body frame.

The head pipe 1 rotatably supports a pair of left and right front forks 16 by a handle 17, and a front wheel 18 is supported at a lower end portion of the front fork 16.

Next, the outline of the air cleaner device will be described with reference to FIG. This air cleaner device includes an air cleaner case 20, an air cleaner cover 22, and an air cleaner element 23.

The air cleaner cover 22 is a suction duct 21.
The air cleaner element 23 has a flat plate shape, and partitions the interior of the air cleaner case 20 into two rooms, a dirty room 24 and a clean room 25, in the front-rear direction.

The air cleaner case 20 is further divided into an upper case 26 and a lower case 27, and both cases have a rib 28 formed on one of the mating edges and a groove 29 formed on the other.
It is welded and integrated in a fitted state.

The dirty room 24 is provided on the rear half side of the air cleaner case 20, and introduces outside air from above the air cleaner device through a cylindrical suction duct 21 extending integrally from the air cleaner cover 22 in the vertical direction, and the air cleaner element 23 is used. Purified clean air is supplied to the carburetor 9 side from the clean room 25 on the first half side.

Dirty room 24 and clean room 25
Seal walls 30 and 31 are integrally formed at the boundary between the inner surface of the upper case 26 and the lower case 27 so as to project inwardly of the air cleaner case, and are continuous in a frame shape as a whole, and the air cleaner element 23 is in contact therewith. A seal 33, which is attached to the surface 32 over the entire circumference, abuts.

A locking piece 35 formed integrally with the upper case 26 is engaged with the opposite surface 34 of the contact surface 32 at the upper part of the air cleaner element 23, and the contact surface 32 side is sealed with the sealing wall 3
It is designed to be fixed while being pressed against the 0 and 31 sides.

In the vicinity of the locking piece 35 of the upper case 26, a duct opening 3 for inserting the suction duct 21 from above is provided.
6 is formed.

A fulcrum portion 37 is formed in a substantially L shape at the lower portion of the air cleaner element 23, and a tip portion 38 of the fulcrum portion is formed into a curved surface, and a bottom portion 27a of the lower case 27 is formed.
Then, it contacts the stepped portion 39 formed at the boundary between the clean room 25 and the dirty room 24.

Next, each part of the air cleaner device will be described in more detail. In FIGS. 3 and 4, reference numeral 40 is a connecting tube that connects the carburetor 9 and the air cleaner element 23, 41 is a volume chamber, and 42 is a breather hose.

Air cleaner cover 22 and upper case 26
As shown in FIG. 3 in which this portion is broken, the locking claw 43 protruding downward to the front part of the air cleaner cover 22 and the locking claw 45 protruding upward from the rear end part of the upper case 26. It is detachably engaged.

That is, the locking claws 43 provided on the left and right of the front portion of the air cleaner cover 22 are engaged with the locking edges 48 (described later) of the upper case 26 surrounding the duct opening 36, and the rear end of the air cleaner cover 22. Locking parts 44 formed on the left and right sides of the part
The engaging claws 45 projecting upward from the right and left of the corresponding rear end portion of the upper case 26 are engaged therewith.

As is apparent from FIG. 5, the duct opening 3
The opening edge portion 46 of the upper case 26 that surrounds 6 forms an annular wall,
The upper end surface thereof is a tapered surface that is inclined toward the central portion of the duct opening 36.

A projecting portion 36a is formed in the duct opening 36 at a substantially central portion on the front side of the opening edge portion 46 (FIG. 4), and the engaging portion 35 is cut out by cutting out the central portion into a substantially U-shape. It is formed with an engaging end portion 47 which is an elastically deformable free end.

The locking piece 35 has a sloped shape that is inclined forward, and the engaging end portion 47 is a free end and projects downward from the locking edge 48. The locking edge 48 is an inner surface of the opening edge portion 46 projecting from the duct opening portion 36 toward the clean room 25.

The central portion of the locking piece 35 projects upward to form a protrusion 49 that comes into contact with the inner surface of the air cleaner cover 22 when the air cleaner cover 22 is attached. The engaging claw 43 is adjusted so as to be engageable with the engaging edge 48 only when engaging with the 23 side.

The seal wall 30 is formed at a position retracted forward from the opening edge portion 46, and surrounds the window hole 50 that connects the clean room 25 and the dirty room 24 together with the seal wall 31 formed at a position corresponding to the seal wall 30. There is.

On the clean room 25 side, the seal wall 30 is integrated with a plurality of ribs 51 projecting toward the inner surface of the upper case 26 and extending in the front-rear direction so as to withstand deformation when the air cleaner element 23 is attached. Reference numeral 52 is a mounting hole for the connecting tube 40.

The air cleaner cover 22 is formed in such a size that it can cover the duct opening 36, and an annular wall 53 that abuts the opening edge 46 is formed on the inner peripheral surface of the air cleaner cover 22 so that the lower end surface serves as the upper end surface of the opening edge 46. It is formed with a reverse taper.

Further, a fitting wall 54 that fits into the duct opening 36 is formed inside the opening edge portion 46, and the fitting wall 54 is reinforced by an integral lattice rib 55.

The locking claw 43 is formed integrally with the right and left parts of the front side portion of the fitting wall 54, and the locking portion 44 is formed with an insertion hole 56 for the locking claw 45.

As shown in FIGS. 7 and 8, the air cleaner element 23 has a substantially rectangular flat plate shape, and the filter 6
It is provided with 0 and a frame member 61 surrounding the periphery.

A flange 62 is integrally formed on the outer peripheral portion of the frame member 61 so as to project outward, and one surface of the flange 62 forms the abutting surface 32, and a seal 33 made of an elastic material such as polyurethane foam is attached thereto. ing.

The other surface of the flange 62 is the opposite surface 34.
And an engaging protrusion 63 protruding rearward at the center of the upper end.
Are integrally formed with a length substantially equal to the length of the locking edge 48.

A pair of fulcrum portions 37 are formed integrally with the flange 62 at an intermediate position at the lower end of the flange 62 so as to obliquely descend toward the rear, and the amount of rearward projection is about the length from the flange 62 to the step 39. It has become.

Next, the operation of this embodiment will be described. Figure 1
When replacing the air cleaner element 23, first, while the air cleaner cover 22 is shifted rearward, the locking claw 45 is deformed to engage the locking portion 44 and the locking portion 34 and the locking edge 48. The engagement is released, and the air cleaner cover 22 is removed from the air cleaner case 20.

When the air cleaner element 23 is disengaged from the engagement projection 63 by subsequently inserting the hand through the duct opening 36 and deforming the engagement end 47 of the locking piece 35 upward, the air cleaner element 23 moves to the fulcrum 37. By turning in the clockwise direction in the figure with the tip portion 38 as a fulcrum, a state of a virtual line is obtained,
It can be removed from the duct opening 36 to the outside.

On the contrary, when mounting the air cleaner element 23, the air cleaner element 20 is tilted from the duct opening 36 into the air cleaner case 20 to be in a state of a virtual line, and the tip 38 of the fulcrum 37 at the lower end is used as the fulcrum. By pushing the part forward, it is rotated counterclockwise in the figure.

As a result, the engagement projection 63 moves between the seal wall 30 and the engagement end 47 while deforming the engagement end 47 of the locking piece 35 upward, and the air cleaner element 2
When 3 is upright as shown by the solid line, the seal 33 becomes the seal wall 3
0 and the seal wall 31 are closely attached.

At the same time, the engaging end 47 is attached to the tip of the engaging protrusion 63.
Contact each other and push the engaging projection 63 forward, so that the seal 33 is pressed against the seal wall 31 and the contact surface 32 to ensure a sufficient sealing property.
Fixed to the side.

After that, the suction duct 21 is put into the duct opening 36 and is engaged with the engaging portion 34 and the engaging claw 45 to attach the air cleaner cover 22 to the air cleaner case 20 to complete the replacement.

In this way, the air cleaner element 23
Since it can be replaced without using a tool, the maintainability is remarkably improved as compared with the conventional screw fastening.

Moreover, since the air cleaner cover 22 and the air cleaner device 10 side can be attached / detached similarly without using a tool, the maintainability is further improved.

In addition, since the abutting end surfaces of the opening edge portion 46 and the annular wall 53 are formed in the inverse taper, the space of the triangular cross section due to the inverse taper is utilized to make the seal member 57 such as an O (O) ring (see FIG. 6) can be provided.

Further, when the air cleaner element 23 is not accurately attached and the engaging protrusion 63 is not located between the seal wall 30 and the engaging end 47, the engaging protrusion 63 causes the engaging end 47 to move. Will be pushed upwards, so the protrusion 4
9 is also pushed up from its original position.

Therefore, even if the air cleaner cover 22 is mounted in this state, the air cleaner cover 2
When the inner surface of 2 abuts on the protrusion 49, the locking portion 34
Also, the engagement with the air cleaner case 20 side by the locking claw 45 becomes impossible.

Therefore, such a defective setting of the air cleaner element 23 can be immediately detected because the air cleaner cover 22 cannot be attached, and the accurate setting can be performed, so that the reliability and the reliability of the setting are improved.

Moreover, since the lower case 27, the upper case 26, and the air cleaner element 23 are structured so that they can be assembled or separated in the same direction, that is, in the vertical direction, they can be molded without using a slide mold. The mold structure becomes simple and the manufacturing cost can be reduced.

Moreover, since the locking piece 35 is provided integrally with the upper case 26, the number of parts can be reduced,
The cost can be reduced and the assembly can be facilitated.

[Brief description of drawings]

FIG. 1 is a schematic sectional view for explaining replacement of an air cleaner element.

[Figure 2] Side view of the main parts of the entire motorcycle equipped with this air cleaner device

FIG. 3 is a side view of the entire air cleaner device with a part thereof cut away.

FIG. 4 is a plan view thereof

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a sectional view of the case cover taken along the line 6-6 of FIG.

FIG. 7 is a side view of the air cleaner element.

FIG. 8 is a view showing the air cleaner element from the direction of the arrow X in FIG.

[Explanation of symbols]

10: Air cleaner device, 20: Air cleaner case,
22: Air cleaner cover, 24: Dirty room, 2
5: clean room, 26: upper case, 27: lower case, 30: seal wall, 31: seal wall, 32: contact surface,
33: seal, 35: locking piece

Claims (3)

(57) [Claims] 1. A dirty room and a clean room provided with a plate-shaped air cleaner element in the air cleaner case.
In the air cleaner device that divides the room into a chamber, connects the clean room to the intake passage of the engine, and connects the dirty room to the atmosphere, the air cleaner case (20) is
Includes case (27) and upper case (26) to cover this opening
Well, the air cleaner element is added to the upper case (26).
An opening (36) for entering and exiting (23) is provided, and this opening
The part (36) is engaged with the air cleaner case by engaging means (43,
44, 45, 48) with an air cleaner cover (2
2), and at the boundary between the dirty room ( 24) and the clean room (25) in the upper case (26) and the lower case (27) , elasticize the peripheral edge (62) of the air cleaner element (23). The seal wall (30) supported via the seal (33) has a continuous frame-like protrusion, and the seal (33) of the seal wall (30) is connected to the air cleaner.
By rotating the na-element, its peripheral edge (62)
Abutting one surface (32) and the other surface (34) of the upper case.
To engage with the locking piece (35) provided on the seat (26)
Seal around the air cleaner element (23)
An air cleaner device for a vehicle engine, characterized in that 2. A peripheral portion (62) of the air cleaner element (23) is provided with an engaging portion for engagement with the locking piece (35) on one side facing the other side, and on the other side at the time of rotation of the air cleaner element. The air cleaner device for a vehicle engine according to claim 1, wherein a fulcrum portion (37) serving as a fulcrum is formed to project. 3. The engagement means (43, 43 ) for the upper case (26) of the air cleaner cover (22) when the air cleaner element (23) and the locking piece (35) are in an incompletely engaged state . 44. The air cleaner device for a vehicle engine according to claim 1 , wherein engagement by means of 44, 45, 48) is disabled.