CN101235774B - Air filter cleaner structure for two-wheel motor vehicle - Google Patents

Abstract

The present invention provides an air cleaner structure for a two-wheeled motor vehicle, which can improve the workability of cleaning the sub-combustion chamber, etc., improve the assembly of the air cleaner, and further increase the degree of freedom in design. In the present invention, the air filter housing (81) has a docking structure for docking the air filter cover (84) on the housing main body (82), and the butt joint surface between the housing main body and the air filter cover (81A) Orthogonal direction is flat, connecting the connecting pipe (48) connected to the engine side to the housing body so that it points to the plane (81B) passing through the butt surface, which will be used to form the secondary combustion chamber (106) The separator (101) is detachably mounted on the housing main body so that it covers the connection pipe connection part (105) and is opposite to the end part (48b) of the connection pipe, and the air filter element (103) is cylindrical , detachably fitted in the component connection hole (101b) provided on the separator (101).

Description

Air filter structure for two-wheeled motor vehicle

technical field

The present invention relates to an improvement in the structure of an air filter for a two-wheeled motor vehicle.

Background technique

As a conventional air cleaner structure for motorcycles, a structure in which a sub-combustion chamber is provided in an air cleaner case is known (for example, refer to Patent Document 1).

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2001-90623.

FIG. 3 , FIG. 4 , and FIG. 6 of Patent Document 1 will be described below.

The air cleaner housing 42 is divided into an element front chamber 44 as a polluted side and an element rear chamber 45 as a clean side by a filter element 43, and a part of the space on the clean side is separated by a partition wall 46 to form a secondary combustion chamber 48, The blow-by gas hose 34 for reducing the blow-by gas from the crankcase of the engine is connected to the sub-combustion chamber 48, and the sub-combustion chamber 48 serves as an oil trap and a resonator for reducing intake noise.

The auxiliary combustion chamber 48 is provided with a combustion chamber cover 64, which is fixed by screws 65, 65 so that the auxiliary combustion chamber 48 can be opened and closed. However, the blocked opening is arranged on the flat auxiliary combustion chamber by the combustion chamber cover 64. Therefore, for example, when cleaning the inside of the sub-combustion chamber 48, it may be difficult for hands to enter the inside and it may be difficult to perform work.

In addition, in the air cleaner device 25 of a motorcycle, like other parts, in order to improve the assemblability of the assembly line, it is desirable to assemble several parts in the air cleaner case 42 in advance. To increase the degree of freedom in design, it is expected that the capacity of the secondary combustion chamber 48 and the technical parameters of the filter element 43 that may affect engine performance or intake sound can be easily changed.

Contents of the invention

An object of the present invention is to improve the workability of cleaning the sub-combustion chamber, etc., to improve the assemblability of the air cleaner, and to further increase the degree of freedom in design.

According to the air cleaner structure of the two-wheeled motor vehicle of the first aspect of the present invention, the inside of the air cleaner housing is divided into a polluted side and a clean side by the air cleaner element, and a secondary combustion chamber is formed on the clean side, and the secondary combustion chamber passes through The blow-by hose communicates with the crankcase of the engine, and it is characterized in that the air filter housing has a docking structure that connects the air filter cover to the housing main body, and the butt joint between the housing main body and the air filter cover The direction perpendicular to the surface is flat, and the connecting pipe connecting the engine side is connected to the main body of the casing so that it points to the plane passing through the mating surface, and the separator for forming the secondary combustion chamber is detachably mounted on the casing. On the main body, so that it covers the connecting part where the connecting pipe is connected to the main body of the housing and is opposite to the end of the connecting pipe. The air filter element is cylindrical and can be detachably fitted into the in the hole.

As an effect, since the separator is attached to the housing main body of the flat air cleaner housing, a flat auxiliary combustion chamber can be formed in a direction perpendicular to the mating surface.

When the air cleaner cover is removed from the air cleaner case, the air cleaner element is removed from the separator, and the separator is further removed from the case main body, the inner wall of the flat sub-combustion chamber is largely opened.

In addition, the separator and the air cleaner element detachably fitted into the hole of the separator may constitute an assembly.

In addition, by changing the shape of the separator, the diameter of the hole, etc., the volume of the secondary combustion chamber or the technical parameters of the air filter can be changed.

In the air cleaner structure of a motorcycle according to the second aspect of the present invention, on the side of the rear wheels, the air cleaner is arranged to be elongated in the front and rear direction of the vehicle body so as to straddle the rear shock absorber unit for the rear wheels, and the housing The mating surface between the body main body and the air cleaner cover extends in the front-rear direction of the vehicle body, the connecting pipe is connected to the housing main body from the center side of the vehicle body width on the front side of the rear damper unit, and the separator is arranged on the entire front side of the rear damper unit superior.

As a function, the butt surface of the housing main body and the air cleaner cover is directed to the front and rear direction of the vehicle body, and the air filter does not protrude in the width of the vehicle body. The capacity of the device becomes larger.

In addition, by arranging the separator on the entire front side of the rear shock absorber unit, the area of the separator can be increased, and when the separator is removed, the sub-combustion chamber is largely opened.

According to a third aspect of the present invention, the air cleaner structure for a motorcycle is characterized in that the separator is formed to surround a connecting pipe connecting portion connecting the casing main body.

As a function, the concave and convex dead space surrounding the connecting portion of the connecting pipe inside the casing main body can be effectively utilized as a sub-combustion chamber.

A fourth aspect of the present invention is an air cleaner structure for a two-wheeled vehicle, wherein the separator is connected to the housing main body by screws, and the screws are arranged so as to be aligned with the air cleaner when viewed from the axial direction of the air cleaner element. The position where elements do not overlap.

As a function, the air cleaner element does not overlap the screw when viewed in the axial direction of the air cleaner element, and therefore, the air cleaner element does not protrude in the vehicle body width direction.

A fifth aspect of the present invention is an air cleaner structure for a motorcycle, wherein an L-shaped discharge pipe composed of a vertical portion extending up and down and a horizontal portion extending horizontally is connected to the sub-combustion chamber, and is provided in the horizontal portion. There is an engaging portion that is engaged and held on the case main body.

As a function, force may be applied to the discharge pipe during maintenance or when the vehicle body vibrates. However, by engaging and holding the engaging part provided on the discharge pipe with the casing body, there is no need to worry about it even if force acts on the discharge pipe. Excessive vibration.

A sixth aspect of the present invention is an air cleaner structure for a motorcycle, wherein the engaging portion is a connecting portion connecting an upstream portion and a downstream portion of the discharge pipe.

As an effect, since the discharge pipe is divided into an upstream portion and a downstream portion, each component becomes shorter. In addition, different materials can be selected for the upstream part and the downstream part.

In the first aspect of the present invention, since the air cleaner housing has a docking structure for docking the air cleaner cover on the housing main body, and the direction perpendicular to the docking surface of the housing main body and the air cleaner cover is Flat, connect the connecting pipe connected to the engine side to the main body of the housing so that it points to the plane passing through the butt surface, and the separator for forming the secondary combustion chamber is detachably installed on the main body of the housing so that It covers the connecting part where the connecting pipe is connected to the main body of the housing and is opposite to the end of the connecting pipe. The combustion chamber is also flat in the direction perpendicular to the mating surface, as long as the air filter cover is removed from the housing body, the air filter element is removed from the separator, and the separator is removed from the housing body, the secondary combustion The inner wall of the chamber is largely opened, so hands can easily enter the entire sub-combustion chamber during cleaning, improving workability.

In addition, as long as the separator and the air cleaner element are assembled, by making the separator and the air cleaner element a small assembly in advance, it is possible to reduce assembly man-hours on the assembly line and improve productivity. Therefore, the cost of the air cleaner can be reduced.

In addition, for example, by expanding the shape of the separator relative to the flat plate, or forming a sunken shape, the capacity of the secondary combustion chamber can be changed, and the capacity of the clean side that affects the engine performance and drivability of the vehicle can be changed, or the intake sound can be affected. In addition, by changing only the separator, the technical parameters of the air filter element can be changed, increasing the degree of freedom in the design of the air filter.

In the second aspect of the present invention, since the air cleaner is arranged elongately in the front-rear direction of the vehicle body so as to straddle the rear shock unit for the rear wheel on the side of the rear wheel, the housing main body and the air cleaner The mating surface of the cover extends in the front-rear direction of the vehicle body, and the connecting pipe is connected to the housing main body from the center side of the vehicle width on the front side of the rear damper unit. The separator is arranged on the entire front side of the rear damper unit, so that air The extension of the filter in the width direction of the vehicle body can increase the capacity of the air filter at the same time, and since the area of the separator can be increased, when the separator is removed, the auxiliary combustion chamber is opened to a large extent. The degree of freedom of the shape of the sub-combustion chamber can be further increased in addition to further improving workability such as cleaning of the sub-combustion chamber.

In the third aspect of the present invention, the separator is formed to surround the connecting pipe connecting portion of the connecting case main body, therefore, the capacity of the sub-combustion chamber is further increased by utilizing the dead space of the connecting pipe connecting portion, thereby suppressing Upsizing of air cleaners.

In the fourth aspect of the present invention, since the separator is connected to the housing main body by screws, and the screws are arranged at positions where they do not overlap with the air cleaner element when viewed in the axial direction of the air cleaner element, therefore, by using the screws, Since the air cleaner element does not protrude in the width direction of the vehicle body, the vehicle body can be downsized and the vehicle width can be reduced.

In the fifth aspect of the present invention, the L-shaped discharge pipe composed of a vertically extending vertical portion and a horizontally extending horizontal portion is connected to the sub-combustion chamber, and the horizontal portion is provided with an engaging portion that is engaged and held by the casing body. Therefore, even if a force acts on the discharge pipe during maintenance or when the vehicle body vibrates, vibration of the discharge pipe can be suppressed by the engaging portion.

In the sixth aspect of the present invention, since the engaging portion is the connecting portion connecting the upstream portion and the downstream portion of the discharge pipe, the discharge pipe can be divided into the upstream portion and the downstream portion, and the parts can be shortened one by one. Easy storage or transportation.

In addition, the upstream part can be made of resin molding, and the downstream part can be made of rubber tubes, etc., increasing the freedom of material selection.

In addition, even if a force acts on the discharge pipe during maintenance or when the vehicle body vibrates, excessive deformation of the upstream portion can be restricted by the engagement portion.

Description of drawings

Fig. 1 is the side view of the two-wheel motor vehicle adopting the air filter structure of the present invention;

Fig. 2 is a side view of the air filter of the present invention;

Fig. 3 is a sectional view of the air filter of the present invention;

4 (a) to (c) are explanatory views of the discharge piping and the piping support portion of the present invention;

Fig. 5 (a)～(d) is the explanatory drawing that shows the connecting pipe of the present invention;

Fig. 6 is a first action diagram showing the action of the air cleaner of the present invention;

Fig. 7 is a second action diagram showing the action of the air cleaner of the present invention;

Fig. 8 is a perspective view showing the body cover of the motorcycle of the present invention;

Fig. 9 is a perspective view showing the main part of the back of the body cover of the motorcycle of the present invention.

Explanation of reference signs:

10: Two-wheeled motor vehicles

24: Rear shock unit

38: Engine

38a: Crankcase

48: connecting pipe

51C: Clean side

51D: Contaminated side

81: Air filter housing

81A: Mating face

81B: plane

82: Housing body

84: Air cleaner cover

86: Discharge pipe (piping for discharge)

86a: Horizontal Section

87: Upstream part (L-shaped pipe)

87a: Vertical section

88: Fastening part (connecting pipe)

91: downstream part (discharge hose)

101: Separator

101b: hole (element connection hole)

103: Air cleaner element

104: screw

105: connecting pipe connection part

106: auxiliary combustion chamber

107: blow-by hose

Detailed ways

Preferred embodiments for carrying out the present invention will be described based on the drawings. In addition, the attached drawing is a figure seen from a sign point.

1 is a side view of a two-wheeled motor vehicle adopting the air cleaner structure of the present invention. The two-wheeled motor vehicle 10 is a small motorcycle vehicle with the following structure. 12, the operating handle 16 is installed on the steering shaft 14 provided on the front fork 13, the front wheel 17 is installed on the lower end of the front fork 13, and the power unit 22 is supported on the frame 11 through the connecting rod 21 to swing up and down freely. In the middle part of the main frame 18 , the rear wheel 23 is mounted on the rear end of the power unit 22 , and the rear shock absorber unit 24 is installed across the rear end of the power unit 22 and the rear part of the main frame 18 .

The body frame 11 is composed of a front pipe 12, a lower frame 26 extending downward from the front pipe 12, a main body extending from the lower part of the lower frame 26 to the left and right rears, and extending rear obliquely upwards at the rear, and the left and right rear ends are connected to each other. Frame 18 constitutes. In addition, 27 is a lower frame which supports the main frame 28. As shown in FIG.

The front portion of the main frame 18 supports a pedal 31 via a supporting member (not shown), and a pivot 34 of a brake pedal 33 for braking the rear wheel 23 is provided between the main frame 18 and the pedal 31 . Use the brake device 32 to act. In addition, 35 is a brake cable that connects the brake pedal 33 and the brake device 32 for the rear wheel, and 36 is a state in which the brake pedal 33 is depressed or released to maintain or release the braking state of the rear wheel 23. The brake locking and unlocking mechanism of the "parking brake", 36a is the operation part that the brake locking and unlocking mechanism 36 has, and 36b is the brake locking and unlocking cable that connects the operation part 36a and the rear wheel brake device 32.

The power unit 22 is composed of an engine 38 constituting its front portion and a continuously variable transmission 39 integrally provided behind the engine 38 . In addition, 38a is the crankcase of the engine 38.

The intake device 41 is composed of an intake pipe 46 connected to the upper portion of the cylinder head 44 of the engine 38, a throttle body 47 connected to the intake pipe 46, and an air cleaner 51 connected to the throttle body 47 via the connection pipe 48. The filter 51 is mounted on the rear upper portion of the power unit 22 .

The exhaust device 42 is composed of an exhaust pipe 54 connected to the bottom of the cylinder head 44, and a muffler 55 connected to the rear end of the exhaust pipe 54. A secondary air supply device 57 is connected to the muffler 55, and the secondary air supply device 57 will Air is supplied to the exhaust gas in the muffler 55 to combust the unburned gas.

61 in the figure is a handle cover, 62 is a front cover, 63 is a license plate, 64 is a leg protection cover, 66 is a front and rear double seat, 67 is a body cover, 68 is an opening formed on the body cover 67, and 71 is a Tail light, 72 is rear fender.

Fig. 2 is a side view showing the air cleaner of the present invention (the arrow FRONT in the figure represents the front of the vehicle, the same below), the air cleaner 51 has an air cleaner housing 81, and the air cleaner housing 81 is composed of A housing main body 82 (not shown) disposed on the side of the rear wheel 23 (see FIG. 1 ) and an air cleaner cover 84 attached to the outer side of the vehicle body of the housing main body 82 with a plurality of screws 83 are configured.

The case main body 82 is integrally formed with a discharge pipe 82c protruding downward to discharge oil in a sub-combustion chamber provided in the air cleaner case 81 to the outside, and a discharge pipe 86 is connected to the discharge pipe 82c. In addition, 82a, 82b are attachment parts for attaching the air cleaner 51 to the power unit 22 (refer FIG. 1), and the casing main body 82 is integrally formed.

The discharge piping 86 is composed of an L-shaped pipe 87 connected to the discharge pipe 82c, which is L-shaped when viewed from the side, a connecting pipe 88 connected to the end of the L-shaped pipe 87, and a discharge hose connected to the connecting pipe 88. 91. The discharge cap 92 that closes the front end of the discharge hose 91 is constituted, the connecting pipe 88 is engaged with the pipe support portion 82A formed at the lower part of the casing main body 82, the discharge pipe 82c, the L-shaped pipe 87, the connecting pipe 88, the discharge pipe 82c, the L-shaped pipe 87, the discharge The connection parts of the hose 91 and the discharge cap 92 are fixedly attached by a hose clamp 93 .

The upper part of the air cleaner cover 84 is equipped with a rubber intake duct 96 for introducing outside air into the air cleaner housing 81, and the intake duct 96 is connected by a duct fitted with the air cleaner cover 84. part 96a, an outer duct 96c extending from the duct connection part 96a on the vehicle front side and having an air intake port 96b in the vehicle front, extending from the duct connection part 96a obliquely downward to the rear of the vehicle in the air cleaner case 81, and An inner duct 96e having an exhaust port 96d is formed.

3 is a sectional view (partial plan view) of the air cleaner of the present invention. The air cleaner 51 is supported by the air cleaner housing 81, the separator 101 installed in the inside of the housing main body 82, and the end. The separator 101 is formed of an air cleaner element 103 whose other end is attached to the housing main body 82 with screws 102 .

The interior of the air cleaner housing 81 is divided into the upstream side of the air flow of the air cleaner element 103, that is, from the intake duct 96 (refer to FIG. The downstream side of the air flow of the filter element 103 , that is, from the air filter element 103 to the clean side 51C of the connecting pipe 48 .

The casing main body 82 has an annular groove 82B integrally on the peripheral edge, and the air cleaner cover 84 has an annular convex portion 84A integrally on the peripheral edge. The casing main body 82 and the air filter cover 84 are butted to form an annular groove. 82B is a butt joint structure fitted with the ring-shaped convex portion 84A. Reference numeral 81A is a mating surface between the case main body 82 and the air cleaner cover 84 and extends in the vehicle front-rear direction.

The separator 101 is a flat plate-shaped member disposed near the connection pipe connection hole 82d, which is a hole opened for connecting the connection pipe 48 to the case main body 82, and a fitting groove is formed on the peripheral edge thereof. 101 a , the fitting groove 101 a is fitted into the annular protrusion 82 e formed on the casing main body 82 , and is mounted on the casing main body 82 by a plurality of screws 104 . In addition, 48 a is an annular groove formed in the connection pipe 48 , and is fitted in the connection pipe connection hole 82 d of the case main body 82 .

The above-mentioned connection pipe connection hole 82 d and the annular groove 48 a constitute a part of the connection pipe connection portion 105 , and the separator 101 is arranged facing the connection pipe connection portion 105 . In addition, the separator 101 is disposed opposite to the end portion 48b of the connection pipe 48 .

The flat space surrounded by the above-mentioned separator 101 and the casing main body 82 is a sub-combustion chamber 106 . The sub-combustion chamber 106 is a space connected to the blow-by hose 107 in the crankcase 38a (see FIG. 1 ) of the engine 38 (see FIG. 1 ) through the connection port 82g formed in the casing main body 82, and has a The blow-by gas introduced into the secondary combustion chamber 106 through the blow-by gas hose 107 in the 38 is an oil retaining groove for separating liquid oil, or a resonator function part for reducing intake noise.

The separator 101 is provided with an element connection hole 101b for connecting the air cleaner element 103, and a rubber seal member 111 is inserted into the element connection hole 101b, and the inner peripheral surface 111a of the seal member 111 is detachably attached. The small-diameter portion 103a of the air cleaner element 103 is fitted.

The air cleaner element 103 is a member with frames 114 and 115 provided at both ends of a filter 113 with an outer diameter of substantially oblong shape, and a small-diameter portion 103a is formed on the frame 114, and a bracket 116 is mounted on the frame 115 to hold The bracket 116 is attached to the boss portion 82 j integrally formed with the case main body 82 by the screw 102 . In addition, 118 is a nut member for tightening the screw 102, which is formed with an internal thread and embedded in the boss portion 82j.

4( a ) to ( c ) are explanatory views of the discharge piping and the piping support portion of the present invention.

(a) is a cross-sectional view showing the pipe 86 for disassembly and discharge. The L-shaped pipe 87 is a rubber member integrally formed with a vertical portion 87a extending vertically and a horizontal portion 87b extending horizontally from the lower end of the vertical portion 87a.

The connection pipe 88 has a base 88a, a small-diameter pipe 88b and a large-diameter pipe 88c extending from the base 88a to both sides, and a flange 88e formed at the end of a head 88d provided on the base 88a.

The discharge hose 91 is made of rubber, and the discharge cap 92 is a cock portion 92a inserted into the end of the discharge hose 91, and a large diameter portion 92b having a larger diameter than the cock portion 92a is formed at the end of the cock portion 92a. constitute.

The above-mentioned horizontal portion 87 b , the connection pipe 88 , and the discharge hose 91 constitute members of the horizontal portion 86 a of the discharge piping 86 .

The end of the vertical portion 87a of the L-shaped pipe 87 is connected to the discharge pipe 82c of the casing body 82, the small diameter portion 88b of the connection pipe 88 is inserted into the end of the horizontal portion 87b of the discharge pipe 82c, and one end of the discharge hose 91 is inserted into the connection pipe. The large-diameter part 88c of 88 is inserted into the cock part 92a of the discharge cap 92 at the other end part of the discharge hose 91 to close it.

The oil accumulated in the discharge piping 86 is discharged by removing the discharge cap 92 .

(b) is a cross-sectional view of the pipe support portion 82A of the case main body 82 that engages and holds the connecting pipe 88 (see (a)), and is a cross-sectional view taken along line 4-4 in FIG. 2 .

The pipe support portion 82A is a portion protruding horizontally inward of the vehicle body, and has a dividing groove 82m and protrusions 82r and 82s protruding downward.

(c) is a plan view of 82 A of pipe support parts, and 82 A of pipe support parts have 82 n of enlarged diameter parts in 82 m of division grooves.

5( a ) to ( d ) are explanatory views showing the connecting pipe of the present invention.

(a) is a side view of the connecting pipe 88, and the connecting pipe 88 has a pair of planar parts 88g and 88h (reference numeral 88g showing only one side) formed on the head part 88d with respect to the inside and outside direction of the figure, and a planar part 88g provided on one side. The vertically long protruding portion 88j protruding from the lower side and protruding on the front side.

(b) is a plan view of the connection pipe 88, and the flat parts 88g and 88h are formed parallel to the extending direction of the small diameter part 88b and the large diameter part 88c, and the protruding part 88j is formed perpendicular to the flat parts 88g and 88h.

In (c), in order to engage and hold the connection pipe 88 on the case main body 82, the large-diameter portion 88c of the connection pipe 88 is directed toward the division groove 82m of the pipe support portion 82A, and the head portion 88d is inserted into the division groove 82m as shown by the arrow. Inside the tank 82m. At this time, since the distance between the planar portions 88g and 88h is smaller than the width of the dividing groove 82m, the head portion 88d can be smoothly inserted into the dividing groove 82m.

For example, even if the small-diameter portion 88b faces the division groove 82m and the head portion 88d is inserted into the division groove 82m, since the protruding portion 88j of the connecting pipe 88 abuts against the protrusion 82r for preventing misassembly provided on the pipe support portion 82A, it cannot inserted to prevent misassembly.

In (d), as shown by the arrow, the connection pipe 88 which inserted the head part 88d into the dividing groove 82m is rotated 90 degrees counterclockwise. As a result, the planar portions 88g and 88h are at positions rotated by 90 degrees with respect to the dividing groove 82m, so that the head portion 88d cannot be detached from the diameter-enlarged portion 82n.

The protrusion 82s acts as a stopper when the connecting pipe 88 is rotated by 90 degrees or more.

Next, the operation of the air cleaner 51 as described above will be described.

FIG. 6 is a first action diagram showing the function of the air cleaner of the present invention, showing that the air cleaner cover 84 (see FIG. 2 ) is removed from the air cleaner case 81 (see FIG. 2 ), and then A state where the air cleaner element 103 (see FIG. 3 ) is removed from the separator 101 .

A separator 101 is attached to a front portion of the housing main body 82 by a plurality of screws 104 .

In this way, since the separator 101 is attached to substantially the entire front portion of the casing main body 82, the area of the separator 101 can be increased, and the volume of the sub-combustion chamber 106 (see FIG. 3 ) can be further increased.

FIG. 7 is a second operation diagram showing the operation of the air cleaner of the present invention, and shows a state in which the separator 101 (see FIG. 6 ) is removed from the housing body relative to the state in FIG. 6 . In addition, a plurality of 82p are screw holes opened in the case main body 82 for tightening the screws 104 (see FIG. 6 ).

Thus, by detaching the separator 101 from the casing main body 82, the inner wall 106a of the sub-combustion chamber 106 is largely opened, for example, the cleaning operation in the sub-combustion chamber 106 can be easily performed, and workability can be improved.

Fig. 8 is a perspective view showing the body cover of the two-wheeled motor vehicle of the present invention, showing that a triangular concave portion 67a is formed on the front portion of the body cover 67, and a rear wall 67b of the concave portion 67a is formed along one side of the triangle with an upper end than a lower end. An elongated opening 67A inclined at the front of the vehicle.

The opening 67A is formed in the center portion of the body cover 67 above the rear end 31 a of the pedal 31 . In addition, 31b is a foot rest part where the occupant seated in the rear part of the front and rear double seat 66 (refer FIG. 1) puts the foot, and 121 is the pedal bottom cover which covers the bottom of the pedal 31. As shown in FIG.

9 is a perspective view showing the main part of the back of the body cover of the two-wheeled motor vehicle of the present invention. The cover member 123 is mounted on the back of the body cover 31 to cover the lower half of the opening 67A, so that one end covers the lower part of the cover member 123. On the back side of the lower end of the body cover 67, a channel member 124 having a J-shaped cross section is attached.

The cover member 123 is formed with an inward protruding wall 123 a protruding inward of the vehicle body.

For example, when rainwater flows into the body cover 67 through the opening 67A, the rainwater is received by the inner groove of the groove member 124 and discharged from between the groove member 124 and the inner protrusion 123a of the cover member 123 as indicated by the arrow. In addition, 123b, 123b are attachment parts formed in the cover member 123 for attachment to the vehicle body cover 67. As shown in FIG.

As shown in FIG. 3 above, in the air cleaner structure of the motorcycle 10 (refer to FIG. 1 ) of the first aspect of the present invention, the inside of the air cleaner housing 81 is divided into the polluted side 51D by the air cleaner element 103. and the clean side 51C, the secondary combustion chamber 106 is formed on the clean side 51C, and the secondary combustion chamber 106 communicates with the engine 38 (refer to FIG. The filter housing 81 has a docking structure for docking the air cleaner cover 84 on the housing main body 82, and is flat in a direction perpendicular to the butt joint surface 81A of the housing main body 82 and the air cleaner cover 84. The connecting pipe 48 connected to the side of the engine 38 is connected to the case main body 82 so that it is directed to the plane 81B passing through the mating surface 81A, and the separator 101 for forming the sub-combustion chamber 106 is detachably attached to the case main body 82. so that it covers the connecting portion (connecting pipe connecting portion 105) of the connecting pipe 48 to the housing main body 82 and is opposite to the end 48b of the connecting pipe 48, the air cleaner element 103 is cylindrical and detachable. It fits in the hole provided in the separator 101, that is, the element connection hole 101b.

Thus, the sub-combustion chamber 106 is also flat in the direction perpendicular to the mating surface 81A, as long as the air cleaner cover 84 is removed from the casing main body 82, the air cleaner element 103 is removed from the separator 101, and then When the separator 101 is removed from the housing main body 82, the inner wall 106a of the sub-combustion chamber 106 is largely opened. Therefore, hands can easily enter the entire sub-combustion chamber 106 during cleaning, thereby improving workability. 

In addition, as long as the separator 101 and the air cleaner element 103 are assembled, by making the separator 101 and the air cleaner element 103 a small assembly in advance, it is possible to reduce assembly man-hours on the assembly line and improve productivity. . Therefore, the cost of the air cleaner 51 can be reduced.

In addition, for example, by expanding the shape of the separator 101 relative to the flat plate, or forming a sunken shape, the capacity of the secondary combustion chamber 106 can be changed, and the capacity of the clean side that affects the engine performance and drivability of the vehicle can be changed, or the capacity of the further combustion chamber can be affected. In addition, by changing only the separator 101, the technical parameters of the air cleaner element 103 can be changed, and the design freedom of the air cleaner 51 can be increased.

In the second aspect of the present invention, on the side of the rear wheels 23 (refer to FIG. 1 ), the air cleaner 51 is arranged in an elongated manner in the front-rear direction of the vehicle body so as to straddle the rear shock absorber unit 24 for the rear wheels, and the housing main body 82 and the butt surface 81A of the air cleaner cover 84 extend in the front-rear direction of the vehicle body, the connecting pipe 48 is connected to the housing main body 82 from the center side of the vehicle body width on the front side of the rear shock absorber unit 24, and the separator 101 is disposed on the rear shock absorber unit 24. The front side of the unit 24 as a whole.

Thus, since the air cleaner 51 is arranged in an elongated shape in the front-rear direction of the vehicle body so as to straddle the rear shock absorber unit 24 for the rear wheel on the side of the rear wheel 23, the housing main body 82 and the air cleaner cover 84 The butt joint surface 81A of the body extends in the front-rear direction of the vehicle body, the connecting pipe 48 is connected to the housing main body 82 from the center side of the vehicle body width on the front side of the rear damper unit 24, and the separator 101 is disposed on the entire front side of the rear damper unit 24, Therefore, the protrusion of the air cleaner 51 in the vehicle body width direction can be suppressed, and the capacity of the air cleaner 51 can be increased at the same time, and since the area of the separator 101 can be increased, it is possible to remove the separator 101 when the separator 101 is removed. At this time, the inside of the sub-combustion chamber 106 is largely opened, and the degree of freedom in the shape of the sub-combustion chamber 106 can be further increased on the basis of further improving the workability such as cleaning of the sub-combustion chamber 106 .

According to the third aspect of the present invention, the separator 101 is formed by surrounding the connection pipe connection portion 105 of the connection case main body 82 .

As a result, the capacity of the sub-combustion chamber 106 is further increased by utilizing the dead space of the connecting pipe connection portion 105 , thereby suppressing an increase in the size of the air cleaner 51 .

In the fourth aspect of the present invention, since the separator 101 is connected to the housing main body 82 by a plurality of screws 104, the screws 104 are arranged at positions not overlapping the air cleaner element 103 when viewed from the axial direction of the air cleaner element 103. .

As a result, the air cleaner element 103 does not protrude in the width direction of the vehicle body due to the screws 104, so that the vehicle body can be downsized and the vehicle width can be reduced.

According to the fifth aspect of the present invention, an L-shaped discharge pipe 86 as a discharge pipe composed of a vertical portion 87a extending up and down and a horizontal portion 86a extending horizontally is connected to the sub-combustion chamber 106, and the horizontal portion 86a is provided with an engaging and holding valve. A connecting pipe 88 as an engaging portion of the case main body 82 .

Accordingly, even if a force acts on the discharge pipe 86 during maintenance or when the vehicle body vibrates, the connection pipe 88 can suppress the vibration of the discharge pipe 86 .

In the sixth aspect of the present invention, as shown in FIG. 2 and FIG. 4( a ), the engaging portion is a connection portion that connects the L-shaped pipe 87 as the upstream portion of the discharge piping 86 and the discharge hose 91 as the downstream portion. The connecting pipe 88.

Thereby, the discharge piping 86 can be divided into the L-shaped pipe 87 and the discharge hose 91, and each part can be shortened, and storage or transportation in a factory becomes easy.

In addition, in the present embodiment, the connection pipe 88 as the connection part is a member separately from the L-shaped pipe 87 as the upstream part and the discharge hose 91 as the downstream part, but it is not limited thereto. The word pipe 87 and the discharge hose 91 are integrally set.

The air filter structure of the present invention is suitable for two-wheeled motor vehicles.

Claims (6)

1. An air filter structure for a two-wheeled motor vehicle, the air filter housing is divided into a polluted side and a clean side by an air filter element, and a secondary combustion chamber is formed on the clean side, and the secondary combustion chamber passes through The air hose communicates with the engine crankcase, and is characterized in that, The air cleaner housing has a docking structure for docking the air cleaner cover on the housing main body, and is flat in a direction perpendicular to the docking surface of the housing main body and the air cleaner cover, connecting the connecting pipe to the engine side to the housing body so as to point to a plane passing through the abutment face, The separator for forming the secondary combustion chamber is detachably mounted on the casing main body so that it covers the connecting portion where the connecting pipe is connected to the casing main body and is opposite to the end portion of the connecting pipe, The air filter element is cylindrical and can be detachably fitted into the hole provided on the separator; The power unit is composed of an engine constituting its front part and a continuously variable transmission integrally arranged at the rear of the engine, and a rear wheel is installed at the rear end of the power unit; The air intake device is composed of an intake pipe connected to the upper part of the cylinder head of the engine, a throttle body connected to the intake pipe, and an air filter connected to the throttle body via the connecting pipe, On the side of the rear wheels, the air cleaner is arranged in a long shape in the front-rear direction of the vehicle body so as to straddle the rear shock absorber unit for the rear wheels, The connection pipe is connected to the housing main body from the vehicle body width central side on the front side of the rear shock absorber unit, The butt surface of the housing main body and the air filter cover extends in the front and rear direction of the vehicle body; The blow-by hose connected to the crankcase of the engine is connected to the auxiliary combustion chamber through a connection port formed on the casing body, and the connection port is arranged in front of the connection part between the casing body and the connecting pipe square position. 2. The air cleaner structure for a two-wheeled motor vehicle according to claim 1, wherein: The separator is disposed on the entire front side of the rear shock absorber unit. 3 . The air cleaner structure for a motorcycle according to claim 1 , wherein the separator is formed to surround a connecting pipe connecting portion connected to the casing main body. 4 . 4. The air filter structure for a two-wheeled motor vehicle according to claim 1, wherein the separator is connected to the housing main body by screws, and the screws are arranged on the side from the air filter element. A position that does not overlap the air cleaner element when viewed axially. 5. The air cleaner structure for a motorcycle according to claim 1, wherein an L-shaped discharge pipe composed of a vertical portion extending up and down and a horizontal portion extending horizontally is connected to the secondary combustion chamber, An engaging portion that is engaged and held by the housing body is provided on the horizontal portion. 6 . The air cleaner structure for a motorcycle according to claim 5 , wherein the engaging portion is a connecting portion connecting an upstream portion and a downstream portion of the discharge pipe.

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