JP4786466B2 - Air cleaner structure - Google Patents

Description

  The present invention relates to an air cleaner structure for a vehicle such as a motorcycle.

Conventionally, in the above air cleaner structure, in order to ensure the air cleaner capacity, an air intake space is formed between the left and right frame members and the outside thereof with respect to a vehicle body frame in which a pair of left and right frame members are extended rearward from the head pipe. (For example, refer to Patent Document 1). The intake spaces are formed by separate case bodies, and the case bodies are connected via a joint tube or the like that passes through the space of the frame member.
JP 2003-335281 A

However, in the above-described conventional configuration, a part for connecting the case bodies is required, which may increase the number of parts of the entire air cleaner device. In addition, since the intake passage is formed in a relatively narrow space between the constituent members of the frame member, the intake passage may be throttled to affect the engine output performance.
The present invention has been made in view of the above circumstances, and provides an air cleaner structure capable of suppressing an increase in the number of parts and suppressing an influence on engine output performance while securing an air cleaner capacity.

As means for solving the above problems, the invention according to claim 1, in an air cleaner structure a pair of right and left frame members (10) to the vehicle body frame (6) which extend rearwardly from the head pipe (7), the right and left frame members ( 10) a frame inner case body (27a ) that forms a frame inner intake space (28a ) between them, and a frame outer case body that forms a frame outer intake space (28b) outside at least one of the left and right frame members (10). (27b) , the case bodies (27a, 27b) are formed integrally with each other across the frame member (10), and the frame outer case body (27b) can be divided into left and right sides. The inner case body (147a) and the outer case body (147b) are formed from the inner case body (147a) and the outer case. Between (147b), the air cleaner element (149) is characterized in that it is clamped.

In an air cleaner structure for a vehicle body frame (6) in which a pair of left and right frame members (10) are extended rearward from the head pipe (7), the air intake inside the frame is provided between the left and right frame members (10). A frame inner case body (27a) that forms a space (28a), and a frame outer case body (27b) that forms a frame outer intake space (28b) outside at least one of the left and right frame members (10). The case bodies (27a, 27b) are formed integrally with each other across the frame member (10), and the frame outer case body (27b) is formed of the left and right frame members (6) of the vehicle body frame (6). 10) is disposed outside the widened portion (6a) extending rearward and to the left and right of the vehicle body, and the frame outer case body (27 ), Characterized in that the substantially cylindrical air cleaner element (49) is housed within.

According to the present invention , the intake spaces are provided between the pair of left and right frame members and the outside thereof to secure the air cleaner capacity, and the intake spaces are formed between the left and right frame members and the outside thereof, respectively. By forming the case bodies integrally with each other, the number of parts of the entire air cleaner device can be suppressed.

According to the present invention , it is not necessary to form the intake passage in a relatively narrow space between the structural members of the frame member, the intake passage is prevented from being throttled to suppress the pressure loss of the intake passage, and the intake passage Engine output can be improved by increasing the degree of freedom in layout.

According to the present invention , even if the outside of the expanded portion in the vehicle body frame becomes a dead space, the dead space can be effectively used as an arrangement space for the air cleaner element.

According to the present invention , the attachment / detachment work of the air cleaner element can be performed from the outside of the vehicle body, and the maintainability can be improved.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the directions such as front, rear, left and right in the following description are the same as those in the vehicle unless otherwise specified. In the figure, the arrow FR indicates the front of the vehicle, the arrow LH indicates the left side of the vehicle, and the arrow UP indicates the upper side of the vehicle.

  As shown in FIGS. 1 and 2, a front wheel 2 of a motorcycle (saddle-ride type vehicle) 1 is pivotally supported at lower ends of a pair of left and right front forks 3. The upper part of each front fork 3 is pivotally supported by the head pipe 7 at the front end of the vehicle body frame 6 via the steering stem 4 so as to be steerable. A steering wheel 5 for steering the front wheels is attached to the upper part of the steering stem 4 via a handle bar 5a. From the upper part of the head pipe 7, a pair of left and right main tubes 8 extend obliquely downward and rearward. From the vicinity of the lower portion of the head pipe 7, a pair of left and right down tubes 9 extend obliquely downward and rearward with a steeper slope than the main tube 8.

  A laterally asymmetric pivot plate 11 is provided at the front and rear intermediate portion of the vehicle body frame 6. The left pivot plate 11 is long in the vertical direction, and its upper portion is bent obliquely upward and forward and is connected to the rear end portion of the left main tube 8. On the other hand, the right pivot plate 11 is short in the vertical direction, and an upper portion thereof is connected to a rear end portion of the right main tube 8 extending toward the right pivot plate 11. Further, the rear end portion of the left and right down tubes 9 is connected to the lower portion of the left and right pivot plates 11. Thus, a double cradle type main frame portion 12 is configured. The body frame 6 of the motorcycle 1 is mainly composed of the main frame portion 12 and the seat frame portion 13 extending rearward from the rear portion of the main frame portion 12.

  The pivot plate 11 pivotally supports the front end of the swing arm 15 so as to be swingable. The swing arm 15 extends rearward from one arm 16 offset from the front end portion (base end portion) to the left side of the vehicle body, and is a piece that pivotally supports the rear wheel 17 at the rear end portion (tip end portion) of the arm 16. It is assumed to be a portable type. The arm 16 is hollow, and a drive shaft (not shown) is inserted into the arm 16. The rear end portion of the arm 16 is a final gear case 18, and the drive shaft and the rear wheel 17 are linked through a bevel gear in the final gear case 18. A rear cushion unit 19 is disposed between the front-rear intermediate portion of the arm 16 and the cushion support portion 11a on the left pivot plate 11.

  An engine 21 having a crankshaft parallel to the vehicle width direction (vehicle body left-right direction) is mounted inside the main frame portion 12. The engine 21 is a narrow-angle V-type two-cylinder engine in which a forward tilt cylinder 23 and a rearward tilt cylinder 24 are erected on a crankcase 22. A transmission case 25 is connected to the rear part of the crankcase 22, and the drive shaft and the engine 21 are connected via a bevel gear at an output part on the left side of the transmission case 25. Thereby, power transmission between the engine 21 and the rear wheel 17 is enabled via the drive shaft.

  A throttle body 26 corresponding to each cylinder 23, 24 is disposed between the banks of both cylinders 23, 24. The downstream side of each throttle body 26 is connected to the intake port at the rear part of the forward tilt cylinder head 23 a or the front part of the rear tilt cylinder head 24 a, and the upstream side of each throttle body 26 is located above the forward tilt cylinder 23. Connected to the air cleaner case 27.

  Exhaust pipes 29 are led out from the exhaust ports at the front part of the forward tilt cylinder head 23a and the rear part of the rearward tilt cylinder head 24a, respectively. Each exhaust pipe 29 is routed to the right side of the engine 21, gathers together, extends rearward, and is connected to a silencer 29a on the right side of the rear part of the vehicle body. The silencer 29a extends substantially along the front-rear direction, and is provided so as to substantially overlap the swing arm 15 in a side view of the vehicle body.

  The seat frame portion 13 mainly includes left and right upper seat rails 31 extending rearward from the upper rear portion of the main frame portion 12 and left and right lower seat rails 32 extending obliquely upward and rearward from the lower rear portion of the main frame portion 12. The rear end portions of the seat rails 31 and 32 are joined together at the rear end portion of the vehicle body. The longitudinal intermediate portions of the seat rails 31 and 32 are coupled via a rear gusset pipe 33 extending over them.

  A front seat 34 for the driver and a rear seat 35 for the rear passenger are respectively supported on the front and rear portions of the seat frame portion 13. The seating position of the front seat 34 is set to be relatively low, and a backrest 34a is disposed at a step portion of the front seat 34 with respect to the rear seat 35. Both sides of the front end portion of the front seat 34 extend forward along the upper edge of the main tube 8. On both sides of the front part of the vehicle body, a driver's step board 36 is provided so as to cross the crankcase 22 and the down tube 9 in a side view of the vehicle body.

  The fuel tank of the motorcycle 1 is divided into an upper fuel tank 37a located in front of the front seat 34 and a lower fuel tank 37b located in a position biased to the lower side and to the right of the front seat 34. The upper fuel tank 37a is disposed between the knees of the driver seated on the front seat 34, and the lower fuel tank 37b is disposed between the front portion of the upper seat rail 31 and the front portion of the lower seat rail 32. . In the figure, reference numeral 38 denotes a radiator that extends between the front edges of the left and right down tubes 9, and reference numeral 39 denotes a retractable side stand that supports the vehicle body in a state tilted to the left.

  A vehicle body cover mainly including resin parts is attached to the vehicle body of the motorcycle 1. The vehicle body cover includes a front cowl 41 that covers a range extending from the front of the head pipe 7 to both sides, a tank cover 42 that is connected to the rear of the front cowl 41 and covers the air cleaner case 27 and the upper fuel tank 37a, and both lower sides of the front cowl 41. A front side cover 43 that extends downward from above and covers the down tube 9 and the radiator 38, an under cover 44 that covers the lower part of the engine 21, the exhaust pipe 29, the silencer 29a, and the like, and a rear side cover 45 that covers both sides of the rear part of the vehicle body. Become main.

  Referring also to FIG. 3, a pair of left and right gusset pipes 14 that are substantially horizontal are provided between the lower portion of the head pipe 7 and the middle portion of the left and right main tubes 8. From the front part of the left and right gusset pipe 14 (near the lower part of the head pipe 7), the left and right down tubes 9 extend obliquely downward and rearward. In addition, a pair of left and right gusset plates 14a are provided on both the left and right sides behind the head pipe 7 at portions surrounded by the front portion of the main tube 8, the head pipe 7 and the front portion of the gusset pipe 14, respectively. It is done.

  A pair of left and right support pipes 14 b are provided between the middle part of the gusset pipe 14 and the front part of the down tube 9 on both the left and right sides behind the head pipe 7. Hereinafter, the front part of the left and right main tubes 8, the front part of the left and right down tubes 9, the left and right gusset pipes 14, the left and right gusset plates 14a, and the left and right support pipes 14b may be referred to as a pair of left and right frame members 10. Reference numeral 14 c in the figure denotes a gusset straddling the front part of the left and right down tubes 9, the front part of the gusset pipe 14, and the lower part of the head pipe 7.

  Referring also to FIG. 4, the front portions of the left and right frame members 10 extend from the head pipe 7 so as to be inclined rearward and outward in the vehicle width direction when the vehicle body is viewed from above. Hereinafter, the part constituted by the front part of the left and right frame member 10 is referred to as an expanded part 6 a of the vehicle body frame 6. 4 and 5 indicate the left and right center of the vehicle body.

  As shown in FIGS. 3 and 4, the air cleaner case 27 includes a frame inner case body 27 a located between the front portions of the left and right frame members 10 (inside the expanded portion 6 a) and a front portion of the left frame member 10 in a top view of the vehicle body. It has a frame outer case body 27b located on the outer side in the vehicle width direction (outside of the expanded portion 6a). The frame inner case body 27a is located above each throttle body 26 and connected thereto. From the left side of the frame inner case body 27a, the frame outer case body 27b extends in a gently curved manner to the left front side. A utility box 42a capable of storing articles and the like is provided in the tank cover 42 above the frame inner case body 27a. In addition, the code | symbol 42b in FIG. 3 shows the lid which opens and closes the upper opening of the utility box 42a.

  A frame inner intake space 28a is formed in the frame inner case body 27a, and a frame outer intake space 28b is formed in the frame outer case body 27b. The case bodies 27a and 27b are formed integrally with each other to form a single air cleaner case 27, and the intake spaces 28a and 28b are communicated with each other to form an integrated intake space 28. The air cleaner case 27 and the intake space 28 extend between the front portions of the left and right frame members 10 and the left outer side thereof, and are provided offset to the left side of the vehicle body as a whole.

  The air cleaner case 27 is divided into upper and lower case bodies 47a and 47b with a substantially horizontal (in detail, slightly inclined downwardly) dividing plane S as a boundary. The upper case body 47a is relatively shallow in the vertical direction, and is located above the main tube 8 in a side view. The upper case body 47a is detachably attached to the upper opening of the lower case body 47b with a plurality of screws or the like. The lower case body 47b is fixed to the vehicle body frame 6 by fixing means such as bolts.

  A lower wall portion of the frame outer case body 27b of the air cleaner case 27 is inclined downward and rearward so as to be substantially parallel to the main tube 8 in a side view of the vehicle body, and is positioned below the main tube 8. From the lower wall portion of the frame outer case body 27b, an intake duct 48 that bends forward extends below the lower wall portion 27b, and the front end opening of the intake duct 48 opens toward the front of the vehicle in the left side portion of the vehicle body cover. Form. In addition, the code | symbol 41a in the figure shows the blowing duct which guide | induces the air in the front cowl 41 outside.

  Referring also to FIG. 5, for example, a cylindrical air cleaner element 49 is accommodated in the frame outer case body 27 b of the air cleaner case 27. The air cleaner element 49 is disposed so that its axis is substantially orthogonal to the lower wall portion of the frame outer case body 27 b and substantially coaxial with the base end portion of the intake duct 48. The air cleaner element 49 filters the intake air from the intake duct 48 and introduces it into the intake space 28. A pair of funnels 51 connected to the throttle bodies 26 protrude into the frame inner case body 27 a, and the filtered intake air is supplied to the throttle bodies 26 through the funnels 51.

  The right end portion of the air cleaner case 27 (the right end portion of the frame inner case body 27a) projects so as to overlap the right frame member 10 (the right main tube 8) when viewed from above, and is positioned above the upper portion. On the other hand, the left side portion (frame outer case body 27b) of the air cleaner extends to the left side (the left and right outer sides of the vehicle body) after straddling the front upper portion of the left frame member 10 (left main tube 8). Note that the lower wall portion (the bottom wall portion of the lower case body 47b) of the base end portion of the frame outer case body 27b (the boundary portion between the case bodies 27a and 27b) avoids the left main tube 8 positioned below the lower wall portion. It is formed in a tunnel shape that protrudes upward as much as possible.

  The left and right outer sides of the expanded portion 6a of the vehicle body frame 6 are covered with a front cowl 41 (vehicle body cover) with a sufficient gap. A frame outer case body 27b and an air cleaner element 49 inside thereof are disposed in the left side portion of the front cowl 41 and on the left outer side of the expanding portion 6a (the left outer side of the front portion of the left frame member 10). On the other hand, an ABS (anti-lock brake system) module 53 in the brake device of the motorcycle 1 is disposed in the right side portion of the front cowl 41 and on the right outside of the expanding portion 6a (the right outside of the front portion of the right frame member 10). Is done. An intake air temperature sensor 54 for detecting the intake air temperature in the air cleaner case 27 is disposed in the left side portion of the front cowl 41 and at the rear of the frame outer case body 27b and the upper case body 47a (see FIG. 3). ).

  As described above, the air cleaner structure in the above embodiment is for the vehicle body frame 6 in which the pair of left and right frame members 10 extend rearward from the head pipe 7, and the frame inner intake space 28 a is interposed between the left and right frame members 10. A frame inner case body 27a and a frame outer case body 27b forming a frame outer intake space 28b outside at least one of the left and right frame members 10, and the case bodies 27a and 27b are integrated with each other. Is formed.

  According to this configuration, the intake spaces 28a and 28b are provided between the pair of left and right frame members 10 and the outside thereof to secure the air cleaner capacity, and the intake air is provided between the left and right frame members 10 and the outside thereof. By forming the case bodies 27a and 27b forming the spaces 28a and 28b integrally with each other, the number of parts of the entire air cleaner device can be suppressed.

  Further, in the air cleaner structure, the case bodies 27a and 27b are integrally formed across the upper portion of the frame member 10 so that an intake passage is formed in a relatively narrow space between the constituent members of the frame member 10. It is not necessary to form the intake passage, and it is possible to prevent the intake passage from being throttled to suppress the pressure loss of the intake air, and to increase the layout freedom of the intake passage to improve the engine output.

  Furthermore, in the air cleaner structure, the frame outer case body 27b is disposed outside the widened portion 6a of the vehicle body frame 6 that extends the left and right frame members 10 rearward and to the left and right outer sides of the vehicle body. By accommodating the substantially cylindrical air cleaner element 49 in 27b, even if the outside of the expanded portion 6a in the vehicle body frame 6 becomes a dead space, the dead space can be effectively used as an arrangement space for the air cleaner element 49. .

Next, a second embodiment of the present invention will be described with reference to FIGS.
The air cleaner structure in this embodiment is different from that of the first embodiment in that it has an air cleaner case 127 that is divided into left and right rather than up and down, and an air cleaner element 149 is sandwiched between the left and right case bodies. The same reference numerals are given to the same parts as those in the first embodiment, and the description thereof is omitted.

The frame outer case body 27b of the air cleaner case 127 includes a right case body 147a located on the left and right inner side (right side) of the vehicle body and a 147b located on the left and right outer side (left side) of the vehicle body, with a dividing plane S ′ substantially orthogonal to the left and right direction as a boundary. Divided into two parts. The left case body 147b is detachably attached to the left (outside) opening of the right case body 147a with a plurality of screws or the like. The right case body 147a is provided integrally with the frame inner case body 27a.
A plate-like air cleaner element 149 that is substantially orthogonal to the left-right direction (that is, substantially parallel to the dividing plane S ′) is accommodated in the frame outer case body 27b. The air cleaner element 149 is located between the left and right case bodies 147a and 147b and is sandwiched between them.
From the front wall portion of the left case body 147b, an intake duct 148 that is bent downward in front extends, and intake air that has entered the intake space 28 from the intake port 148a at the tip of the intake duct 148 is filtered by the air cleaner element 149. And supplied to each throttle body 26.

  As described above, in the air cleaner structure in the second embodiment, the frame outer case body 27b is formed from the left and right case bodies 147a and 147b that can be divided into right and left, and the air cleaner is interposed between the left and right case bodies 147a and 147b. By sandwiching the element 149, the air cleaner element 149 can be attached and detached from the outside of the vehicle body, and the maintainability can be improved.

The present invention is not limited to the above-described embodiment. For example, the frame body case body may be provided on the right outer side of the widened portion of the body frame, or the outer side of the frame may be disposed on the left and right outer sides of the widened portion. It is good also as a structure which has a case body.
The configuration in the above embodiment is an example of the present invention, and various modifications can be made without departing from the gist of the present invention, such as being applicable to a three-wheel or four-wheel vehicle or a scooter type vehicle. Not too long.

1 is a left side view of a motorcycle according to an embodiment of the present invention. Fig. 3 is a right side view of the motorcycle. Fig. 3 is a left side view showing main parts in a front part of a vehicle body of the motorcycle. FIG. 4 is a top view of FIG. 3. It is the top view which removed the upper case body of the air cleaner case in FIG. It is a left view equivalent to FIG. 3 in 2nd Example of this invention. FIG. 5 is a top view corresponding to FIG. 4 in the second embodiment.

Explanation of symbols

1 Motorcycle (saddle-ride type vehicle)
6 Body frame 6a Expanding portion 7 Head pipe 10 Frame member 27a Frame inner case body 27b Frame outer case body 28a Frame inner intake space 28b Frame outer intake space 49, 149 Air cleaner element 147a Right case body (inner case body)
147b Left case body (outer case body)

Claims (2)

In an air cleaner structure for a vehicle body frame (6) in which a pair of left and right frame members (10) are extended rearward from the head pipe (7) ,
Forming a frame inner case and (27a), the left and right frame members (10) of at least one of the outside frame outside air intake space (28b) forming a frame inner intake space (28a) between the right and left frame members (10) A frame outer case body (27b)
The case bodies (27a, 27b) are formed integrally with each other across the frame member (10) ,
The frame outer case body (27b) is formed of an inner case body (147a) and an outer case body (147b) that can be divided into right and left, and between the inner case body (147a) and the outer case body (147b). And an air cleaner element (149) . In an air cleaner structure for a vehicle body frame (6) in which a pair of left and right frame members (10) are extended rearward from the head pipe (7),
A frame inner case body (27a) that forms a frame inner intake space (28a) between the left and right frame members (10), and a frame outer intake space (28b) outside at least one of the left and right frame members (10). A frame outer case body (27b)
The case bodies (27a, 27b) are formed integrally with each other across the frame member (10),
The frame outer case body (27b) is disposed outside the widened portion (6a) of the vehicle body frame (6) extending from the left and right frame members (10) to the rear and the vehicle body left and right sides. (27b) A substantially cylindrical air cleaner element (49) is accommodated in the air cleaner structure.

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