JP2016172532A - Air-intake structure of saddle riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-intake structure of a saddle riding type vehicle, which is hard to be limited in layout of an air-intake device, assuring an arrangement space of the air-intake device and a length of an air-intake passage, with improvement in appearance being possible.SOLUTION: There are provided a main frame 22 which extends backward from a head tube 21 downwardly, an engine in which a cylinder part 36 being arranged below the main frame 22 is inclined frontward, and an air-intake device 33 connected to a cylinder head 52 provided at the cylinder part 36. The air-intake device 33 is provided with an air cleaner 48. The main frame 22 consists of a front part 22a provided just behind the head tube 21, and a pair of left and right rear parts 22b branching respectively from the front part 22a to the left and right. In the front part 22a, an air cleaner case 34 is formed which constitutes the air cleaner 48 just behind the head tube 21. The rear parts 22b branch from the rear part of the front part 22a respectively to the left and right, to cover a side surface of the air-intake device 33.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an intake structure for a saddle-ride type vehicle in which a part of a frame forms an air cleaner case.

  Conventionally, a layout in which a body frame constitutes an air cleaner case is known (see, for example, Patent Document 1).

Japanese Patent No. 4773783

In Patent Document 1, when an air cleaner case is configured with a vehicle body frame, the intake device is placed in a narrow space between the engine and the vehicle body frame, so the layout of the intake device is greatly restricted, and the length of the intake passage is secured. There was a problem that was difficult to do. Further, since the intake device is visually recognized below the vehicle body frame, there is a problem in terms of appearance in a vehicle in which the vehicle body side is not covered with the vehicle body cover.
SUMMARY OF THE INVENTION An object of the present invention is to provide an intake structure for a saddle-ride type vehicle that is not easily restricted by the layout of the intake device, ensures the arrangement space of the intake device and the length of the intake passage, and can improve the appearance. .

In order to solve the above-described problems, in the present invention, a frame (22) extending rearward and downward from the head pipe (21) and a cylinder portion (36) disposed below the frame (22) are in a forward inclined posture. The engine (31) and a suction device (33) connected to a cylinder head (52) provided in the cylinder portion (36), and the intake device (33) includes an air cleaner (48). In the vehicle intake structure, the frame (22) includes a front part (22a) provided immediately after the head pipe (21), and a rear part (22b) branched from the front part (22a) to the left and right. The front portion (22a) is formed with an air cleaner case (34) constituting the air cleaner (48) immediately after the head pipe (21). The rear portion (22b) is characterized by covering a side surface of the front portion and the intake system is branched respectively from the rear to the left and right (22a) (33).
According to this configuration, even if the intake passage of the intake device is extended upward from the cylinder head, it does not interfere with the rear portion of the frame, and the intake device is disposed while securing the space for the intake device and the length of the intake passage. The layout can be made compact. In addition, since the intake device is hardly visible from the side, the appearance can be improved.

The said structure WHEREIN: You may make it the air cleaner element (68) accommodated in the said air cleaner case (34) arrange | position along the lower surface of the said front part (22a).
In the above configuration, an element holder (66) for holding the air cleaner element (68) is disposed at a lower end portion of the front portion (22a), and the element holder (66) is arranged in the air cleaner case (34). An intake duct (66a) for introducing air into the inside may be formed integrally.
Moreover, in the said structure, you may make the width | variety of the vehicle width direction of the lower part of the said frame (22) narrow from the said front part (22a) to the said head pipe (21).

In the above configuration, the intake device (33) on the upstream side of the cylinder head (52) may entirely overlap the frame (22) in a side view.
Further, in the above configuration, the intake passage (75) from the connection portion of the intake device (33) with the cylinder head (52) to the air cleaner case (34) is obliquely rearward and upward from the cylinder head (52). You may make it extend in the front diagonally upward after extending.
Further, in the above configuration, the intake device (33) includes a connecting tube (58) extending from the throttle body (57) through the rear wall (22j) of the front portion (22a) and into the air cleaner case (34). You may make it provide.

  The frame of the present invention is composed of a front part provided immediately after the head pipe and a rear part branching left and right from the front part, and the front part is formed with an air cleaner case constituting an air cleaner immediately after the head pipe. The rear part branches right and left from the rear part of the front part and covers the side surface of the intake device, so that even if the intake passage of the intake device extends upward from the cylinder head, it does not interfere with the rear part of the frame, The layout of the intake device can be made compact while securing the arrangement space of the intake device and the length of the intake passage. In addition, since the intake device is hardly visible from the side, the appearance can be improved.

Further, since the air cleaner element housed in the air cleaner case is disposed along the lower surface of the front portion, it is possible to secure a space for arranging the intake device in the front portion, and to easily secure the intake passage. it can. Further, the volume in the air cleaner case can be secured.
In addition, an element holder for holding the air cleaner element is disposed at the lower end of the front portion, and the element holder is integrally formed with an intake duct for introducing air into the air cleaner case, so the intake duct is integrated with the element holder. By providing in, the number of parts can be reduced and cost can be suppressed.

In addition, since the width in the vehicle width direction at the lower part of the frame is narrowed from the front part to the head pipe, a large space is secured around the intake duct inlet of the element holder arranged at the lower part of the frame to reduce the intake air amount of the intake duct. Can be secured.
In addition, since the intake device upstream of the cylinder head entirely overlaps the frame when viewed from the side, the intake device is less likely to be visually recognized from the outside, and appearance can be improved.

Further, since the intake passage extending from the connecting portion with the cylinder head in the intake device to the air cleaner case extends obliquely upward and rearward from the cylinder head, the intake passage extends obliquely upward and forward, so that the length of the intake passage can be easily secured. .
Further, since the intake device includes a connecting tube that extends from the throttle body through the rear wall of the front portion and extends into the air cleaner case, the intake passage can be lengthened while reducing the exposed portion of the connecting tube.

It is a perspective view which shows the principal part of a vehicle provided with the air cleaner structure which concerns on this invention. It is a perspective view which shows the intake device and main frame which were connected to the cylinder part. It is a right view which shows a vehicle body frame and a cylinder part. It is a rear view which shows the intake device and vehicle body frame which were connected to the Linda head. It is a front view which shows an air cleaner and its periphery. FIG. 6A is a cross-sectional view of the air cleaner, FIG. 6A is a cross-sectional view taken along the line VIA-VIA of FIG. 3, and FIG. 6B is a cross-sectional view taken along the line VIB-VIB of FIG. It is a side view which shows a main frame, an intake device, and its periphery. It is a disassembled perspective view of an air cleaner. It is an exploded view of the air cleaner seen from the side. It is a perspective view which shows the case part of a main frame. It is a front view which shows the opening part of a case part, and its periphery, FIG. 11 (A) is a front view which shows the state which assembled | attached the element holder to the step part around the opening part, FIG.11 (B) is an opening part. It is a front view which shows the state which open | released.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description, descriptions of directions such as front and rear, right and left and up and down are the same as directions with respect to the vehicle body unless otherwise specified. Further, in each figure, the symbol FR indicates the front of the vehicle body, the symbol UP indicates the upper side of the vehicle body, and the symbol LH indicates the left side of the vehicle body.
FIG. 1 is a perspective view showing a main part of a vehicle 10 having an intake structure according to the present invention.
The vehicle 10 includes a body frame 11 serving as a skeleton, a front wheel supported by the body frame 11 via a front fork 12, a rear wheel supported by a lower part of the body frame 11 via a swing arm, A two-wheel saddle-ride type vehicle including a seat supported on an upper portion.
The vehicle body frame 11 includes a head pipe 21 that constitutes a front end portion, a main frame 22 that extends obliquely downward and rearward from the head pipe 21, and a pair of left and right seat rails 25 that are connected to the upper rear portion of the main frame 22 and extend obliquely upward and backward. , 25.

The head pipe 21 supports the front fork 12 so as to be steerable. The main frame 22 supports the engine 31 at a lower portion thereof, and a cavity provided at a front portion forms a part of an air cleaner case 34 provided in an intake device 33 of the engine 31. The seat rail 25 supports the seat. Further, a swing arm is swingably supported by a pivot shaft provided at a rear end portion of the main frame 22, and a rear wheel is supported by a rear end portion of the swing arm via an axle.
The front fork 12 includes a steering stem 26 rotatably supported by the head pipe 21, a bridge member 27 attached to the lower portion of the steering stem 26, and a pair of left and right fork tubes supported at both ends of the bridge member 27. It consists of. Front wheels are supported on the lower ends of the left and right fork tubes via axles.
The engine 31 includes a crankcase 35 and a cylinder portion 36 that extends substantially forward from the front portion of the crankcase 35, and an intake device 33 is connected to the upper portion of the cylinder portion 36.

FIG. 2 is a perspective view showing the intake device 33 and the main frame 22 connected to the cylinder portion 36.
The main frame 22 includes a front portion 22a partly formed in a box shape, and a pair of left and right plate-like rear portions 22b and 22b that integrally extend rearward and downward from the left and right of the rear end portion of the front portion 22a. .
The front end portion of the front portion 22 a is fastened to the head pipe 21 with bolts 43 and nuts 44. The rear portions 22b and 22b are spaced apart from each other on the left and right, and a space 47 in which the intake device 33 is disposed is formed between the left and right rear portions 22b and 22b.
The intake device 33 is connected to the upper part of the cylinder part 36 of the engine 31 and extends upward between the left and right rear parts 22b, 22b, and is connected to the rear wall 22j of the front part 22a.
The rear end portion of the rear portion 22b is formed with a fastening portion for fastening the center frame, specifically, a plurality of bolt insertion holes 22y for inserting fastening bolts.

FIG. 3 is a right side view showing the vehicle body frame 11 and the cylinder portion 36.
A pair of left and right plate-like upper stays 41 and a pair of left and right lower stays 42 are attached to the upper rear portion and the lower rear portion of the head pipe 21, and bolts 43 and nuts 44 are respectively attached to the left and right upper stays 41 and the left and right lower stays 42. The front end of the main frame 22 is detachably connected.
The front portion 22a of the main frame 22 includes a front connection portion 22d connected to the head pipe 21 and a box-shaped case portion 22e formed integrally with the rear portion of the front connection portion 22d.

The front connecting portion 22d is composed of a plate-like portion 22f made of a plate narrow in the vehicle width direction and a pair of left and right integrally formed so as to protrude from the upper end portion of the plate-like portion 22f to both sides in the vehicle width direction. The front end portion of the plate-like portion 22f is connected to the head pipe 21.
The case portion 22e includes a front wall 22h, a rear wall 22j (see FIG. 2), a left wall 22k (see FIG. 1), a right wall 22m, and an upper wall 22n, and an opening that opens downward is covered with a case cover 46. Thus, the air cleaner case 34 of the air cleaner 48 is formed. That is, the air cleaner case 34 includes a case portion 22 e and a case cover 46.
Each of the left and right rear portions 22b has a side opening 22p formed on the side surface, and the throttle body 57 constituting the intake device 33 can be maintained through the side opening 22p.
The cylinder portion 36 of the engine 31 (see FIG. 10) has a cylinder axis 36a that is largely inclined forward, that is, is disposed substantially horizontally, and includes a cylinder block 51, a cylinder head 52, and a head cover 53.

The cylinder block 51 is formed with a cylinder hole, and a piston is movably inserted into the cylinder hole. The axis of the cylinder hole is the cylinder axis 36a. The cylinder head 52 is attached to the front end portion of the cylinder block 51, and the intake device 33 is connected to the upper portion of the cylinder head 52. The head cover 53 closes an opening provided at the front end of the cylinder head 52. In the side view, the entire intake device 33 is not visually recognized except that a part thereof is visually recognized from the side opening 22p. Therefore, in a vehicle in which the side of the vehicle body is not covered with the vehicle body cover, the appearance can be improved.
A tubular air intake duct 66a that introduces air into the air cleaner 48 is disposed in a space 81 that can be formed on the side of the front connecting portion 22d of the main frame 22 so as to extend obliquely upward and rearward from the case cover 46 side.

FIG. 4 is a rear view showing the intake device 33 and the vehicle body frame 11 connected to the cylinder head 52.
The left and right rear portions 22b, 22b of the main frame 22 are formed so as to be bound to the inner side in the vehicle width direction with respect to the front portion 22a. Accordingly, it is easy to arrange the driver's legs seated on the seat, and the front portion 22a disposed in front of the rear portions 22b and 22b can be widely formed without being affected by the driver's legs. The capacity of the air cleaner case 34 can be increased.
A cable groove 22r through which the throttle cable 64 is passed is formed on the upper surface 22q of the front portion 22a of the main frame 22 near the right edge. Thereby, the throttle cable 64 can be positioned. Further, the number of members for positioning and supporting the throttle cable 64 can be reduced.

The intake device 33 is connected to an intake pipe 56 connected to an upper portion of the cylinder head 52, a throttle body 57 connected to the upper end portion of the intake pipe 56, and an upper end portion of the throttle body 57 via a connecting tube 58. An air cleaner 48. The intake device 33 is covered with rear portions 22b and 22b of the main frame 22 from both sides. Reference numeral 70 denotes a frame center line 70 extending vertically through the center of the main frame 22 in the vehicle width direction.
A throttle cable 64 is connected to the right side surface of the throttle body 57.
The connecting tube 58 is connected to the rear wall 22j offset to the right side with respect to a frame center line 70 extending vertically through the center of the main frame 22 in the vehicle width direction.

FIG. 5 is a front view showing the air cleaner 48 and its surroundings.
The air cleaner 48 includes a case portion 22e provided on the main frame 22, a case cover 46 that closes the opening of the case portion 22e, and an element holder 66 that is sandwiched and held between the case portion 22e and the case cover 46. . The element holder 66 is a component that holds an air cleaner element (not shown) in cooperation with the case cover 46, and extends upward and obliquely rearward from the case cover 46 side, and outside air enters the air cleaner 48 from an opening provided at the upper end. A pair of left and right intake ducts 66a, 66a are provided.
The case portion 22e and the case cover 46 constitute an air cleaner case 34.

Side wall lower portions 23a, 23a that are lower portions of the left wall 22k (see FIG. 4) and the right wall 22m (see FIG. 4) of the case portion 22e protrude outward in the vehicle width direction from the case cover 46. Further, a lower inner surface 23e composed of inner surfaces 23c, 23c of the left and right side wall lower portions 23a, 23a and an inner surface 23d of the rear wall lower portion 23b, which is a lower portion of the rear wall 22j (see FIG. 4) of the case portion 22e, Is formed so as to surround.
The left and right intake ducts 66a, 66a are disposed on both sides of the head pipe 21 in a front view.

FIG. 6 is a cross-sectional view of the air cleaner 48. 6A is a cross-sectional view taken along line VIA-VIA in FIG. 3, and FIG. 6B is a cross-sectional view taken along line VIB-VIB in FIG.
As shown in FIG. 6A, a cavity 22z is formed inside the case portion 22e of the main frame 22, and a step portion 22t is formed on the inner surface of the cavity 22z. An opening 22s of a cavity 22z is provided inside the step 22t, and the peripheral edge 66b of the element holder 66 is applied to the step 22t.
The peripheral edge 66 b is pressed and fixed to the peripheral wall 46 a of the case cover 46. In addition, an annular wall portion 66c that is integrally formed so as to protrude vertically inside the peripheral edge portion 66b of the element holder 66 and an annular wall portion that is integrally formed inside the peripheral wall portion 46a of the case cover 46 are formed. An air cleaner element 68 (specifically, a side protrusion 68c) is sandwiched and held between the inner protrusion wall 46b.
The case cover 46 is fastened to the case portion 22e of the main frame 22 by a fastening member (not shown).
The air cleaner element 68 divides the space in the air cleaner case 34 into a dirty side 71 on the case cover 46 side and a clean side 72 on the case portion 22e side.

As shown in FIG. 6B, the front connection portion 22d of the main frame 22 includes a plate-like portion 22f that extends vertically, and left and right flange portions 22g that extend integrally from the upper end of the plate-like portion 22f outward in the vehicle width direction. , 22g. In the figure, W1 is the width (thickness) of the plate-like portion 22f in the vehicle width direction, and W2 is the width of the left and right flange portions 22g, 22g in the vehicle width direction.
As described above, by extending the flange portions 22g, 22g from the plate-like portion 22f at a substantially right angle, the strength and rigidity can be increased, and on the other hand, the weight can be reduced.
The element holder 66 includes a flat base plate 66d and intake ducts 66a and 66a provided in the vicinity of both edges in the vehicle width direction of the base plate 66d.
The upper opening 66e provided at the upper end portion of the intake duct 66a is opened near the ends of the left and right flanges 22g, 22g of the main frame 22, and the lower opening 66f provided at the lower end portion of the intake duct 66a is the base plate. An opening is formed in the dirty side 71 between 66 d and the case cover 46.

FIG. 7 is a side view showing the main frame 22 and the intake device 33 and their surroundings.
The intake device 33 includes a fuel injection valve 74 attached to the intake pipe 56. The fuel injection valve 74 injects fuel into the combustion chamber surrounded by the cylinder hole in the cylinder block 51, the piston in the cylinder hole, and the cylinder head 52 through the intake pipe 56 and the intake port formed in the cylinder head 52. .
An intake passage 75 extends from the intake pipe 56 to the connecting tube 58 in the intake device 33.
The intake passage 75 is curved obliquely upward and rearward from the cylinder head 52 side in the intake pipe 56, extends obliquely upward and rearward from the intake pipe 56 side in the throttle body 57, and is connected to the throttle body 57 side in the connecting tube 58. After being extended obliquely upward and rearward from the upper side, the curved portion extends upward and obliquely forward and further curved in the air cleaner case 34 and extends downward and obliquely forward.

The throttle body 57 includes a throttle valve (not shown) that opens and closes an intake passage 75 penetrating the inside, a throttle shaft 76 that supports the throttle valve, and a throttle pulley 77 that is attached to an end of the throttle shaft 76. A throttle cable 64 is wound around the throttle pulley 77. The throttle cable 64 includes outer cables 86 and 86 whose ends are supported by a cable support member 85 fixed to the rear portion 22 b of the main frame 22, and an inner wire 87 that is movably inserted into the outer cables 86 and 86. It consists of.
An inner wire 87 is wound around the throttle pulley 77. A throttle grip is provided at the end of the bar handle supported on the upper end of the front fork 12 (see FIG. 1), and both ends of the inner wire 87 are fixed to the throttle grip. Accordingly, by rotating the throttle grip, one end of the inner wire 87 is pulled, and the throttle pulley 77 rotates. As a result, the throttle valve is opened and closed via the throttle shaft 76.

As described above, the intake passage 75 is secured longer than in the prior art. This is because a part of the intake device 33 can be disposed between the left and right rear portions 22 b of the main frame 22. In addition, since the intake passage 75 is bent between the left and right rear portions 22b, the intake passage 75 can be formed longer. The connecting tube 58 includes a straight portion 58a that is long in the front-rear direction and bent portions 58b and 58c that are bent substantially at right angles from both ends of the straight portion 58a. By extending the straight portion 58a through the rear wall 22j of the case portion 22e of the main frame 22 and extending from the rear wall 22j to the vicinity of the front end in the case portion 22e, the straight portion 58a can be lengthened. 75 can be lengthened.
Even if the intake passage 75 is lengthened, the entire intake device 33 is covered with the rear portion 22b from the side, so that the appearance can be improved.

FIG. 8 is an exploded perspective view of the air cleaner 48. FIG. 9 is an exploded view of the air cleaner 48 as viewed from the side, and shows a cross section of the main frame 22 cut in the front-rear direction.
As shown in FIGS. 8 and 9, the element holder 66 is a frame-shaped member, and an annular wall 66c is provided around the opening 66g of the base plate 66d.
The air cleaner element 68 includes a rectangular frame portion 68a and a filter 68b made of filter paper provided inside the frame portion 68a. The frame portion 68a is formed with an annular side protruding portion 68c protruding sideways.
The case cover 46 includes a box-shaped tray portion 46c, a peripheral wall portion 46a that forms the periphery of the tray portion 46c, and an inward protruding wall 46b (see FIG. 6A) formed inside the peripheral wall portion 46a. Prepare.

In the air cleaner element 68, the side protrusion 68c is held between the annular wall 66c of the element holder 66 and the inward protrusion wall 46b of the case cover 46 (see also FIG. 6A).
The front wall 22h of the case portion 22e of the main frame 22 includes a left inclined wall 22u and a right inclined wall 22v extending obliquely outward and rearward from the rear end of the plate-like portion 22f of the front connection portion 22d.
The left and right spaces 81 surrounded by the front wall 22h of the case portion 22e, the plate-like portion 22f of the front connection portion 22d, and the left and right flange portions 22g are suction spaces for sucking outside air from the intake duct 66a. A sufficiently large space 81 is secured.

As shown in FIG. 9, the lower surface 46e of the case cover 46 has a flat surface 46f substantially parallel to the end surface 46d of the peripheral wall portion 46a, and is inclined upward from the front edge of the flat surface 46f to the flat surface 46f. 46g of inclined surfaces formed in this way. Thus, by providing the inclined surface 46g on the front side of the lower surface 46e of the case cover 46, the traveling air can be directed to the cylinder portion 36, and the cylinder portion 36 can be further cooled.
As for the connecting tube 58, the upper end part of the linear part 58a located in the case part 22e adjoins or contact | abuts to the inner surface 22w of the upper wall 22n of the case part 22e. Thereby, the vibration of the connecting tube 58 can be suppressed.

  Further, the connecting tube 58 has a length L1 from the fitting portion 58d to the front end portion in the air cleaner case 34 and a length L2 from the fitting portion 58d to the rear end portion on the throttle body 57 side is substantially equal. In this manner, the length L1 from the fitting portion 58d to the front end portion in the air cleaner case 34 is substantially equal to the length L2 from the fitting portion 58d to the rear end portion on the throttle body 57 side, so that the connecting tube In addition to shortening the length of 58 exposed to the outside, it is possible to ensure a long intake passage 75 (see FIG. 7). Here, the lengths L1 and L2 are the lengths along the step portion 22t of the case portion 22e, and are lengths based on the center of the fitting portion 58d in the direction along the step portion 22t.

FIG. 10 is a perspective view showing the case portion 22 e of the main frame 22.
A step 22t surrounding the opening 22s of the case 22e is formed in a substantially pentagonal shape, and the element holder 66 (see FIG. 8) is applied to the step 22t via a seal member.
The lower inner surface 23e of the case portion 22e is composed of three inner surfaces 23c, 23c, and 23d arranged in a U-shape. The inner surface as described above is not provided on the front wall 22h side, and the front wall 22h The lower end is a step 22t.
On the upper wall 22n of the case portion 22e, ribs 22x projecting downward from the inner surface 22w are formed to increase strength and rigidity.
The connecting tube 58 of the intake device 33 is formed with a fitting portion 58d that fits in a through hole formed in the rear wall 22j of the case portion 22e at an intermediate portion of the straight portion 58a.
By providing the fitting portion 58d, the connecting tube 58 and the through hole of the rear wall 22j and the periphery of the through hole can be firmly fitted, and rattling of the connecting tube 58 can be eliminated.

FIG. 11 is a front view showing the opening 22s of the case 22e and the periphery thereof. FIG. 11A is a front view showing a state in which the element holder 66 is assembled to the step 22t around the opening 22s, and FIG. 11B is a front view showing a state in which the opening 22s is opened. .
As shown in FIG. 11A, in the element holder 66, a rectangular opening 66g is opened in a substantially rectangular base plate 66d, and intake ducts 66a and 66a are provided in the vicinity of the corner on the front side of the base plate 66d. The intake ducts 66a and 66a are arranged so as to sandwich the plate-like portion 22f on the left and right.
The intake duct 66a is a pipe having an oval cross section with a long axis extending in the vehicle width direction. Thereby, the passage cross-sectional area is expanded in the vehicle width direction, and the intake air amount can be increased.
The annular wall portion 66c of the element holder 66 is a portion that protrudes downward from the base plate 66d and holds the air cleaner element 68 (see FIG. 8).

As shown in FIG. 11B, in the front view, the step portion 22t of the case portion 22e is formed so as to rise forward, so that the entire portion is formed so as to be visible. Thereby, for example, the attachment of the connecting tube 58 to the case portion 22e and the attachment / detachment of the element holder 66, the air cleaner element 68, and the case cover 46 to the opening 22s of the cavity 22z can be easily performed from the front of the vehicle. Therefore, assembly property and maintenance property can be improved.
Further, since the front wall 22h of the case portion 22e, specifically, the left inclined wall 22u and the right inclined wall 22v are inclined obliquely rearward when viewed from the side in the vehicle width direction, the running resistance can be reduced.

  As shown in FIGS. 1, 3, 5, and 7, the main frame 22 as a frame extending rearward and downward from the head pipe 21 and the cylinder portion 36 disposed below the main frame 22 are inclined forward. In the intake structure of the vehicle 10 as a saddle-ride type vehicle that includes an engine 31 that is in a posture and an intake device 33 that is connected to a cylinder head 52 provided in the cylinder portion 36, and that includes an air cleaner 48 in the intake device 33. The frame 22 includes a front part 22a provided immediately after the head pipe 21 and a pair of left and right rear parts 22b branched from the front part 22a to the left and right. The front part 22a is provided with an air cleaner immediately after the head pipe 21. 48 is formed, and the rear part 22b is a rear part of the front part 22a. On the left and right branch to cover the side surfaces of the intake device 33.

According to this configuration, even if the intake passage 75 of the intake device 33 extends upward from the cylinder head 52, it does not interfere with the rear portion 22 b of the main frame 22, and the arrangement space of the intake device 33 and the length of the intake passage 75 are not affected. As a result, the layout of the intake device 33 can be made compact. In addition, since the intake device 33 is hardly visible from the side, the appearance can be improved.
If the length of the intake passage 75 can be secured, it is possible to improve the volumetric efficiency of the air sucked into the engine using the intake inertia effect, and the engine performance can be improved.
Further, since the air cleaner case 34 is formed by the front portion 22a, it is difficult to be influenced by the driver's legs, and the capacity of the air cleaner case 34 can be increased.

7, 8, and 9, since the air cleaner element 68 accommodated in the air cleaner case 34 is disposed along the lower surface of the front portion 22a, the intake device 33, Specifically, a space for disposing the connecting tube 58 can be secured, and the intake passage 75 can be easily secured. Further, the volume in the air cleaner case 34 can be secured.
An element holder 66 that holds an air cleaner element 68 is disposed at the lower end of the front portion 22a, and the element holder 66 is integrally formed with an intake duct 66a that introduces air into the air cleaner case 34. By providing the intake duct 66a integrally with the holder 66, the number of parts can be reduced and the cost can be reduced.

Further, as shown in FIGS. 6B and 8, since the width in the vehicle width direction of the lower part of the main frame 22 is narrowed from the front part 22 a to the head pipe 21, it is arranged at the lower part of the main frame 22. It is possible to secure a large space 81, which is a space around the inlet of the intake duct 66a of the element holder 66, and to secure the intake amount of the intake duct 66a.
Further, as shown in FIGS. 3 and 7, since the intake device 33 upstream of the cylinder head 52 is entirely overlapped with the main frame 22 in a side view, the intake device 33 becomes difficult to be visually recognized from the outside, and the appearance is improved. Can be improved. In addition, the intake device 33 can be protected from the side by the rear portion 22 b of the main frame 22.

In addition, since the intake passage 75 extending from the connection portion of the intake device 33 to the air cleaner case 34 to the air cleaner case 34 extends rearward and obliquely upward from the cylinder head 52, the intake passage 75 extends obliquely forward and upward. The length of the passage 75 can be easily secured.
Further, as shown in FIG. 9, the intake device 33 includes a connecting tube 58 that extends from the throttle body 57 through the rear wall 22j of the front portion 22a and extends into the air cleaner case 34. Therefore, the intake device 33 is connected to the outside of the connecting tube 58. The intake passage 75 (see FIG. 7) can be lengthened while reducing the exposed portion.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
For example, in the above embodiment, as shown in FIG. 2, the front end of the main frame 22 is fastened to the head pipe 21 with a bolt 43 and a nut 44, but the present invention is not limited thereto, and the head pipe 21 and the main frame 22 are welded. It may be joined with.
The present invention is not limited to the case where the present invention is applied to the two-wheeled vehicle 10 but can be applied to a saddle-ride type vehicle including other than two-wheeled vehicles.

10 Vehicle (saddle-ride type vehicle)
21 Head pipe 22 Main frame (frame)
22a Front part 22b Rear part 31 Engine 33 Intake device 34 Air cleaner case (case)
36 Cylinder part 48 Air cleaner 52 Cylinder head 57 Throttle body 61 ECU
66 Element holder 66a Intake duct 68 Air cleaner element 75 Intake passage

Claims (7)

A frame (22) extending rearward and downward from the head pipe (21), an engine (31) in which a cylinder portion (36) disposed below the frame (22) is in a forward inclined posture, and the cylinder portion (36 An intake device (33) connected to a cylinder head (52) provided on the intake device (33), and an air cleaner (48) in the intake device (33).
The frame (22) includes a front part (22a) provided immediately after the head pipe (21) and a rear part (22b) branched from the front part (22a) to the left and right.
The front part (22a) is formed with an air cleaner case (34) constituting the air cleaner (48) immediately after the head pipe (21), and the rear part (22b) is a rear part of the front part (22a). An intake structure for a saddle-ride type vehicle, which branches right and left from the side to cover the side surface of the intake device (33).   The air cleaner element (68) accommodated in the air cleaner case (34) is disposed along the lower surface of the front portion (22a), and the intake structure of the saddle-ride type vehicle according to claim 1, .   An element holder (66) for holding the air cleaner element (68) is disposed at the lower end of the front portion (22a), and the element holder (66) introduces air into the air cleaner case (34). The intake structure for a saddle-ride type vehicle according to claim 2, wherein the intake duct (66a) is integrally formed.   The bag according to any one of claims 1 to 3, wherein a width in a vehicle width direction of a lower portion of the frame (22) is narrowed from the front portion (22a) to the head pipe (21). Air intake structure for riding type vehicles.   The saddle riding according to any one of claims 1 to 4, wherein the intake device (33) upstream of the cylinder head (52) overlaps the frame (22) in a side view. Type vehicle intake structure.   An intake passage (75) extending from the connecting portion of the intake device (33) to the cylinder head (52) to the air cleaner case (34) extends obliquely upward and rearward from the cylinder head (52). The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 5, wherein   The intake device (33) includes a connecting tube (58) extending from the throttle body (57) through the rear wall (22j) of the front portion (22a) into the air cleaner case (34). The intake structure for a saddle-ride type vehicle according to any one of claims 1 to 6.

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