JP2018131981A - Air cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner device which can prevent deterioration of intake efficiency when an intake passage is integrated with a cleaner cover.SOLUTION: An air cleaner device includes: a partition wall which is sandwiched between a cleaner case and a cleaner cover 52, defines a clean chamber with the cleaner case, and defines a dirty chamber with the cleaner cover 52; an emission control filter supported by the partition wall and partitioning the clean chamber and the dirty chamber; a first duct formation body which is formed at the partition wall at the dirty chamber side and spreads while curving from an edge of an opening 61 opened on the partition wall to define a first duct wall; and a second duct formation body which is formed at the cleaner cover 52 at the dirty chamber side and is combined with the first duct wall to define a second duct wall forming a curved duct 72 leading to the dirty chamber.SELECTED DRAWING: Figure 5

Description

  The present invention provides a cleaner case, a cleaner cover positioned in front of the cleaner case in the vehicle front-rear direction, and the cleaner case and the cleaner cover. A clean room is defined between the cleaner case and the cleaner cover. The present invention relates to an air cleaner device including a partition wall that divides a dirty chamber in between, and a purification filter that is supported by the partition wall and partitions the clean chamber and the dirty chamber.

  Patent Document 1 discloses an intake device (air cleaner device) for an internal combustion engine. The air intake device includes a partition member that is sandwiched between a main body (cleaner case) and a lid member (cleaner cover), defines a clean chamber with the rear main body, and partitions a dirty chamber with the front lid member. Prepare. The partition member holds a filter element that partitions the clean chamber and the dirty chamber. The partition member is formed with an intake port that opens rearward and is connected to an intake passage in the lid member.

Patent No. 5987425

  In Patent Document 1, an air intake path leading to the dirty chamber is defined in the lid member. The intake passage extends along one imaginary plane including the mating surfaces of the lid member and the partition member. Since the intake port opens in a plane parallel to the imaginary plane, the air drawn linearly in the direction perpendicular to the imaginary plane collides with the inner wall of the lid member and cannot flow smoothly, and the intake efficiency is increased. It will decline.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an air cleaner device capable of avoiding a reduction in intake efficiency when an intake passage is integrated with a cleaner cover.

  According to the first aspect of the present invention, a cleaner case, a cleaner cover positioned in front of the cleaner case in the vehicle front-rear direction, and the cleaner case and the cleaner cover are sandwiched between the cleaner case and the cleaner case. A partition that defines a clean chamber and a clean chamber between the cleaner cover, a purification filter that is supported by the partition and partitions the clean chamber and the dirty chamber, and is formed on the partition on the dirty chamber side. A first duct forming body that is curved and spreads from an edge of the opening formed in the partition wall to partition the first duct wall, and is formed on the cleaner cover on the dirty chamber side, and is formed on the first duct wall. A second duct forming body that defines a second duct wall that is combined to form a curved duct that communicates with the dirty chamber. Air cleaner apparatus to obtain is provided.

  According to the second aspect, in addition to the configuration of the first side surface, the outlet end of the duct is located above the upper end of the purification filter in the dirty chamber.

  According to the third aspect, in addition to the configuration of the first or second side surface, the air cleaner device includes an inlet end that opens in the clean chamber, and extends from the inlet end and curves along the inner wall surface of the clean chamber. A first bending tube that is connected to the first bending tube and extends linearly, and is connected to the connecting tube and is bent along the inner wall surface of the clean chamber, and is pierced in the cleaner case. A connecting tube having a second curved tube having an exit end coupled to the opening to be drooped;

  According to the fourth aspect, in addition to the configuration of the third side surface, the first bending tube and the second bending tube are formed of rubber tubes, and the connection tube is formed of a resin tube connecting the rubber tubes. Composed.

  According to the fifth aspect, in addition to the configuration of the third or fourth side, the inlet end of the connecting tube has an opening facing the purification filter.

  According to the sixth aspect, in addition to the structure of any one of the first to fifth aspects, the air cleaner device is integrally formed with the cleaner case, and is coupled to the opening of the partition wall and goes upward. And a suction duct having an open end away from a virtual plane including the cleaner case and the mating surface of the partition wall.

  According to the first aspect, air flows into the dirty chamber from the opening of the partition wall through the curved duct. Since the duct has a curved shape, the sucked air can be smoothly introduced into the dirty chamber.

  According to the second aspect, the intake air is likely to hit the entire surface of the purification filter that partitions the dirty chamber. Therefore, high purification efficiency is realized.

  According to the third aspect, the connecting tube functions as a discharge path for discharging air from the clean chamber to the outside of the air cleaner device. Since the connecting tube is composed of the first bent tube, the connecting tube, and the second bent tube, the length of the connecting tube can be sufficiently secured in the clean room.

  According to the fourth invention, since the resin tube maintains its shape, the distance between the first bending tube and the second bending tube is reliably maintained. Therefore, a sufficient length can be secured for the connecting tube even in a limited space of the air cleaner device case.

  According to the fifth aspect of the present invention, the inlet of the connecting tube faces the purification filter in the clean room, so that the suction efficiency is increased.

  According to the sixth aspect, the air cleaner device is mounted on a saddle-ride type vehicle and is disposed in front of a down tube extending rearward and downward from the head pipe. The suction duct of the cleaner case can be opened with a substantially vertical surface.

1 is a side view of a motorcycle as a saddle-ride type vehicle according to an embodiment of the present invention. It is an enlarged side view of an air cleaner apparatus. It is an enlarged rear view of the air cleaner device observed from the rear and slightly downward. It is an enlarged plan view of the connecting tube finished in the clean room. It is an enlarged front view of an air cleaner apparatus. It is an expansion perspective view of the partition observed from the dirty room side. It is an expansion perspective view of the cleaner cover observed from the dirty room side.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, front and rear, top and bottom, and left and right refer to directions viewed from the occupant who rides the motorcycle.

  FIG. 1 schematically shows a motorcycle 11 as a saddle-ride type vehicle according to an embodiment of the present invention. The motorcycle 11 includes a body frame 12 and a body cover 13 that at least partially covers the body frame 12. The vehicle body frame 12 includes a head pipe 14, a single down tube (main frame) 15 that extends rearward and downward from the head pipe 14, and a pair of left and right pivot plates 16 that are connected to the rear end of the down tube 15 and extend downward. And a pair of left and right seat rails 17 extending rearward from the rear end of the down tube 15. A front fork 18 is supported on the head pipe 14 so as to be steerable. A front wheel WF is supported on the front fork 18 so as to be rotatable around an axle 19. A steering handle 21 is coupled to the upper end of the front fork 18.

  A swing arm 23 is connected to the pivot plate 16 so as to swing up and down around the pivot 22. The rear wheel WR is supported on the swing arm 23 so as to be rotatable around the axle 24. A rear cushion unit 25 is disposed between the seat rail 17 and the swing arm 23 at a position away from the pivot 22.

  The vehicle body cover 13 includes a front cover 26 that covers the head pipe 14 and the down tube 15, and a body cover 27 that is connected to the rear end of the front cover 26 and covers the pivot plate 16 and the seat rail 17. The front cover 26 is formed with a pair of left and right knee covers 28 that form a ventilation space that opens to the front under the head pipe 14. An occupant seat 29 is attached to the body cover 27 so as to be opened and closed. When the driver straddles the occupant seat 29, the driver's knee is covered with the knee cover 28 from the front. A fuel tank (not shown) covered from above with a passenger seat 29 is accommodated in the body cover 27.

  An internal combustion engine 31 is supported on the body frame 12. An engine main body 32 of the internal combustion engine 31 includes a crankcase 34 that rotatably supports a crankshaft 33 having an axis parallel to the axle 24, and a cylinder block 35 that is coupled to the crankcase 34 and slidably receives a piston. And a cylinder head 36 coupled to the cylinder block 35 to form an intake port and an exhaust port leading to the combustion chamber. The engine body 32 is coupled to the down tube 15 and the pivot plate 16 in a forward inclined posture in which the cylinder axis C is tilted forward at an angle close to 90 degrees around the axis of the crankshaft 33.

  The internal combustion engine 31 includes a transmission (not shown) that is housed in a crankcase 34 and connected to the crankshaft 33. The transmission transmits the rotational power of the crankshaft 33 to the output shaft 37 while changing the gear ratio between the crankshaft 33 and the output shaft 37. The output shaft 37 is connected to the rear wheel WR by a driving force transmission mechanism 38. The driving force transmission mechanism 38 includes a driving sprocket 39 fixed to the protruding end of the output shaft 37, a driven sprocket 41 fixed to the rear wheel WR, and a chain 42 wound around the driving sprocket 39 and the driven sprocket 41. . Thus, the power of the crankshaft 33 is transmitted to the rear wheel WR.

  An exhaust pipe 44 is connected to the cylinder head 36 of the internal combustion engine 31. The upstream end of the exhaust pipe 44 is coupled to the lower wall of the cylinder head 36. The exhaust pipe 44 is connected to the exhaust port. An exhaust muffler (not shown) that extends rearward from the axle 24 is connected to the exhaust pipe 44. The combustion gas in the combustion chamber is exhausted from the exhaust muffler via the exhaust port and the exhaust pipe 44.

  The motorcycle 11 includes an air cleaner device 45 disposed below the head pipe 14 and in front of the down tube 15. The air cleaner device 45 is coupled to the upstream end of the throttle body 46. An intake pipe 47 is coupled to the downstream end of the throttle body 46. The intake pipe 47 is connected to the cylinder head 36 of the internal combustion engine 31. The downstream end of the intake pipe 47 is coupled to the upper side wall of the cylinder head 36. The intake pipe 47 is connected to the intake port. The outside air is purified by the air cleaner device 45 and introduced into the throttle body 46. Fuel is injected into the outside air by the throttle body 46. The air-fuel mixture generated by the throttle body 46 is supplied to the combustion chamber via the intake pipe 47 and the intake port.

  The air cleaner device 45 is sandwiched between the cleaner case 51, the cleaner cover 52 positioned in front of the cleaner case 51 in the vehicle front-rear direction, and the cleaner case 51 and the cleaner cover 52. A partition wall 53 is provided for partitioning the chamber and partitioning the dirty chamber with the cleaner cover 52. The cleaner cover 52 and the partition wall 53 are fastened to the cleaner case 51 by a plurality of screw members 54. A pair of attachment plates 55 are formed at the upper end of the cleaner case 51 and extend in parallel to a virtual plane orthogonal to the axis of the axle 24. The mounting plate 55 is superposed on a bracket fixed to the down tube 15 and coupled to the bracket by a fastener 56. The fastener 56 may be composed of a combination of bolts and nuts, for example.

  As shown in FIG. 2, suction ducts 58 are respectively arranged outside the pair of mounting plates 55 in the vehicle width direction. The suction duct 58 is formed integrally with the cleaner case 51. The suction duct 58 has an open end 58a that moves away from a virtual plane 59 that includes the mating surfaces of the cleaner case 51 and the partition wall 53 as it goes upward. Here, the air cleaner device 45 is fixed to the down tube 15 in a forward inclined mounting posture in which the upper side of the mating surfaces of the cleaner case 51 and the partition wall 53 is inclined forward. Therefore, the open end 58a of the suction duct 58 is partitioned by a vertical plane orthogonal to the ground. The suction duct 58 is connected to an opening serving as a suction port 61 formed in the partition wall 53. The suction port 61 faces the dirty chamber of the cleaner cover 52. Therefore, the air flowing in from the open end 58a of the suction duct 58 is introduced into the dirty chamber through the suction port 61.

  The partition wall 53 supports a purification filter (filter element) 62 that partitions the clean chamber and the dirty chamber. The air in the dirty room is purified by the purification filter 62 and flows into the clean room.

  As shown in FIG. 3, the cleaner case 51 is attached with a connecting tube 63 accommodated in a clean chamber in the cleaner case 51. As shown in FIG. 4, the connecting tube 63 includes an inlet end 64 that opens in the clean chamber, a first curved tube 65 that extends from the inlet end 64 and curves along the inner wall surface of the clean chamber, and a first curved tube. 65, a connecting pipe 66 extending linearly, and an outlet end 67 connected to the connecting pipe 66, curved along the inner wall surface of the clean chamber, and coupled to the opening 51a formed in the cleaner case 51. And a second bending tube 68 having The inlet end 64 of the connecting tube 63 has an opening facing the surface of the purification filter 62. The opening opens in a virtual plane parallel to the surface of the purification filter 62.

  The first curved tube 65 is connected to the linear region 65a linearly extending in parallel to the surface of the purification filter 62, and the upstream end of the linear region 65a, and has an acute angle around the axis of curvature perpendicular to the surface of the purification filter 62. An upstream curved region 65b that is curved and curved at an angle of 90 ° toward the surface of the purification filter 62 at the inlet end 64, and a curvature center that is connected to the downstream end of the linear region 65a and is orthogonal to the surface of the purification filter 62 And a downstream curved region 65c connected to the upstream end of the connecting pipe 66 by bending at an obtuse angle. A 180 ° change in direction along the surface of the purification filter 62 is realized by the acute angle of the upstream curved area 65b and the obtuse angle of the downstream curved area 65c. A tab 69 extending in parallel with the surface of the purification filter 62 is integrally formed in the linear region 65a. The tab 69 is formed with a through hole through which the shaft portion of the screw passes. The tab 69 is fixed to the cleaner case 51 from the clean chamber side with, for example, screws.

  The second curved pipe 68 is connected to the downstream end of the connecting pipe 66, and a first curved region 68 a that is curved at an angle close to 180 ° around the axis of curvature center orthogonal to the surface of the purification filter 62, and the purification filter 62. And a second curved region 68b that curves in the opposite direction to the first curved region 68a and reaches the outlet end 67 around the axis of the center of curvature perpendicular to the surface. The outlet end 67 of the connecting tube 63 is fitted in the opening 51 a of the cleaner case 51 in an airtight manner. The line of the connecting tube 63 extends in parallel to the surface of the purification filter 62 except for the inlet end 64 and the outlet end 67, and rises at an arbitrary angle with respect to the surface of the purification filter 62 at the inlet end 64 and the outlet end 67.

  The first bent tube 65 and the second bent tube 68 are made of rubber tubes, and the connecting tube 66 is made of a resin tube connecting the rubber tubes. The rubber tube has flexibility. The resin tube is molded from a hard resin. The rubber tube is formed with a reinforcing semi-cylindrical body extending in the axial direction of the barycentric line (the line connecting the centroids of each cross section) of the space in the pipe and in the circumferential direction of the pipe.

  As shown in FIG. 5, the cleaner cover 52 includes a box 71 that is closed by a partition wall 53 and partitions a dirty chamber between the cleaner cover 52 and the partition wall 53. The box body 71 is connected to left and right curved connection ducts 72. An inlet end 72 a of the connection duct 72 is coupled to the suction port 61 formed in the partition wall 53. The center of gravity line of the pipe duct space of the connection duct 72 at the inlet end 72 a is orthogonal to the plane including the opening of the suction port 61. The center of gravity line of the pipe duct space of the connection duct 72 at the outlet end 72 b is positioned in parallel to the plane including the opening of the suction port 61. Therefore, between the inlet end 72 a and the outlet end 72 b, the connection duct 72 is curved over 90 ° around the axis of curvature center parallel to the plane including the opening of the suction port 61.

  As shown in FIG. 6, the two first duct formation bodies 74 that diverge from the edge of the suction port 61 bored in the partition wall 53 and divide the first duct wall 73 in the partition wall 53 on the dirty chamber side. Is formed. The first duct wall 73 corresponds to a curved semi-cylindrical pipe inner wall. The two first duct forming bodies 74 are partitioned by a plane 75 fitted to the upper end of the purification filter 62. The plane 75 is positioned parallel to the axis of the suction port 61.

  The first duct forming body 74 rises vertically from the surface of the partition wall 53 at one end of the diameter line 76 of the suction port 61, and continues from the first ridge line 77a and the first ridge line 77a, and the partition wall 53 A second ridgeline 77b extending in parallel with the surface of the suction port 61, a third ridgeline 78a that rises perpendicularly from the surface of the partition wall 53 at the other end of the diameter line 76 of the suction port 61, and draws a quarter circle, and continues from the third ridgeline 78a. And a fourth ridgeline 78b extending in parallel to the surface of the partition wall 53. The 1st ridgeline 77a and the 3rd ridgeline 78a are located in parallel at equal intervals. The 2nd ridgeline 77b and the 4th ridgeline 78b are located in parallel at equal intervals. The first duct wall 73 is disposed so as to be recessed in a semicircular shape between the first ridgeline 77a and the second ridgeline 77b and the third ridgeline 78a and the fourth ridgeline 78b. The first ridge line 77 a and the second ridge line 77 b are connected to the surface of the partition wall 53 by a first curved wall 79 having a bus line that rises perpendicularly from the surface of the partition wall 53. The third ridgeline 78a and the fourth ridgeline 78b and the surface of the partition wall 53 are connected by a second curved wall 81 having a bus line that rises perpendicularly from the surface of the partition wall 53. Here, although the same reference numerals are given to the left and right first duct formation bodies 74, they do not necessarily have to be formed in plane symmetry.

  As shown in FIG. 7, two second duct forming bodies 84 that partition the second duct wall 83 are formed on the cleaner cover 52 on the dirty chamber side. Each of the second duct forming bodies 84 has an edge 85 that overlaps the surface of the partition wall 53 by connecting both ends of the diameter line 76 of the suction port 61 while drawing a semicircle. At one end of the edge 85, a quadrant circular arc is formed that is vertically recessed from the edge 85, and is connected to a first receiving part 86a that receives the first ridge line 77a of the first duct forming body 74, and a first receiving part 86a. A second receiving portion 86b that extends in parallel with the mating surface with the partition wall 53 and receives the second ridgeline 77b of the first duct forming body 74 is continuous. The first receiving portion 86a and the second receiving portion 86b support the first ridgeline 77a and the second ridgeline edge 77b of the first duct forming body 74 received by the first receiving portion 86a and the second receiving portion 86b from the outside 1 A line-shaped convex piece 87 is connected. At the other end of the edge 85, a quadrangular arc that is recessed vertically from the edge 85 is drawn, and is connected to a third receiving part 88a that receives the third ridgeline 78a of the first duct forming body 74, and a third receiving part 88a. The fourth receiving portion 88b that extends in parallel to the mating surface with the partition wall 53 and receives the fourth ridgeline 78b of the first duct forming body 74 continues. The third receiving portion 88a and the fourth receiving portion 88b support the third ridgeline 78a and the fourth ridgeline edge 78b of the first duct forming body 74 received by the third receiving portion 88a and the fourth receiving portion 88b from the outside 1 A line-shaped convex piece 89 is connected.

  The second duct wall 83 corresponds to a semicylindrical tube inner wall that is recessed from the edge 85 and curved. The individual second duct walls 76 are combined with the corresponding first duct walls 73 to form a single connection duct 72 having a curved shape. The downstream ends 84a of the two second duct formation bodies 84 are partitioned by a plane that is flush with the plane 75 described above. Therefore, the outlet end 72b of the connection duct 72 is located above the upper end of the purification filter 62 in the dirty chamber.

  Next, the operation of this embodiment will be described. The housing of the air cleaner device 45 is sandwiched between the cleaner case 51, the cleaner cover 52 positioned in front of the cleaner case 51, and the cleaner case 51 and the cleaner cover 52. And a partition wall 53 that partitions the dirty chamber between the cleaner cover 52 and the cleaner cover 52. The partition wall 53 supports a purification filter 62 that partitions the clean chamber and the dirty chamber. During operation of the internal combustion engine 31, air is sucked from the two suction ducts 58. The sucked air flows from the suction port 61 of the partition wall 53 into the dirty chamber through the connection duct 72. Here, the connection duct 72 is formed in the partition wall 53 on the dirty chamber side, spreads while curving from the edge of the suction port 61, and defines the first duct wall 73, and on the dirty chamber side. A second duct forming body 84 is formed on the cleaner cover 52 and defines a second duct wall 83 that is combined with the first duct wall 73 to form a curved pipe-shaped space that communicates with the dirty chamber. Since the connection duct 72 has a curved shape, the sucked air can be smoothly introduced into the dirty chamber.

  The outlet end 72b of the connection duct 72 is located above the upper end of the purification filter 62 in the dirty chamber. Therefore, the air flowing into the dirty chamber from the outlet end 72 b of the connection duct 72 tends to hit the entire surface of the purification filter 62. High purification efficiency is realized. If the outlet end 62b of the connection duct 72 is positioned below the upper end of the purification filter 62, the intake air does not spread above the outlet end 72b of the connection duct 72, and the entire purification filter 62 is effectively utilized. I can't.

  In this embodiment, the connecting tube 63 is connected to the inlet end 64 that opens in the clean chamber, the first bent tube 65 that extends from the inlet end 64 and curves along the inner wall surface of the clean chamber, and the first bent tube 65. The second curved tube having a connecting pipe 66 that extends linearly, a second curved pipe connected to the connecting pipe 66, curved along the inner wall surface of the clean chamber, and has an outlet end 67 coupled to the opening 51 a of the cleaner case 51. 68. The connecting tube 63 functions as a discharge path for discharging air from the clean chamber to the outside of the air cleaner device 45. Since the connecting tube 63 includes the first bending tube 65, the connecting tube 66, and the second bending tube 68, the length of the connecting tube 63 can be sufficiently secured in the clean room.

  In the connecting tube 63, the first bent tube 65 and the second bent tube 68 are made of rubber tubes, and the connecting tube 66 is made of a resin tube connecting the rubber tubes. Since the resin tube maintains its shape, the distance between the first bending tube 65 and the second bending tube 68 is reliably maintained. Therefore, a sufficient length can be secured for the connecting tube 63 even in a limited space of the air cleaner case 51.

  In the air cleaner device 45, the inlet end 64 of the connecting tube 63 has an opening facing the purification filter 62. Since the inlet of the connecting tube 63 faces the purification filter 62 in the clean room, the suction efficiency is increased.

  The suction duct 58 is formed integrally with the cleaner case 51 and is coupled to the suction port 61 of the partition wall 53, and as it goes upward, the open end 58 moves away from the virtual plane 59 including the mating surfaces of the cleaner case 51 and the partition wall 53. Have The air cleaner device 45 is mounted on the motorcycle 11 and is disposed in front of a down tube 15 extending rearward and downward from the head pipe 14. With this mounting posture, the suction duct 58 of the cleaner case 51 can be opened in a substantially vertical plane.

45 ... Air cleaner device 51 ... Cleaner case 51a ... Opening 52 ... Cleaner cover 53 ... Partition wall 58 ... Suction duct 58a ... Open end 59 ... Virtual plane (including mating surface) 61 ... Opening (suction) Mouth), 62 ... Purification filter, 63 ... Connecting tube, 64 ... Inlet end, 65 ... First bent tube, 66 ... Connecting tube, 67 ... Outlet end, 68 ... Second bent tube, 72 ... Duct (connection duct), 72b ... outlet end, 73 ... first duct wall, 74 ... first duct forming body, 75 ... flat surface, 83 ... second duct wall, 84 ... second duct forming body.

Claims (6)

A cleaner case (51),
A cleaner cover (52) positioned in front of the cleaner case (51) in the longitudinal direction of the vehicle;
It is sandwiched between the cleaner case (51) and the cleaner cover (52), and a clean chamber is defined between the cleaner case (51) and a dirty chamber is defined between the cleaner cover (52). A partition wall (53);
A purification filter (62) supported by the partition wall (53) and partitioning the clean chamber and the dirty chamber;
Forming a first duct that is formed in the partition wall (53) on the dirty chamber side and spreads while curving from the edge of the opening (61) bored in the partition wall (53) to partition the first duct wall (73). Body (74);
A second duct wall (83) that is formed on the cleaner cover (52) on the dirty chamber side and is combined with the first duct wall (73) to form a curved duct (72) that leads to the dirty chamber. An air cleaner device comprising: a second duct forming body (84) that divides the air.   The air cleaner apparatus according to claim 1, wherein an outlet end (72b) of the duct (72) is located above an upper end of the purification filter (62) in the dirty chamber. .   The air cleaner device according to claim 1 or 2, wherein an inlet end (64) that opens in the clean chamber and a first curved tube that extends from the inlet end (64) and curves along the inner wall surface of the clean chamber. (65), a connecting pipe (66) that is connected to the first bending pipe (65) and extends linearly, and is connected to the connecting pipe (66) to bend along the inner wall surface of the clean chamber. An air cleaner device comprising a connecting tube (63) having a second curved tube (68) having an outlet end (67) coupled to an opening (51a) bored in the cleaner case.   4. The air cleaner device according to claim 3, wherein the first bending pipe (65) and the second bending pipe (68) are made of a rubber tube, and the connection pipe (66) connects the rubber tube. An air cleaner device comprising a resin tube.   The air cleaner apparatus according to claim 3 or 4, wherein the inlet end (64) of the connecting tube (63) has an opening facing the purification filter (62).   The air cleaner device according to any one of claims 1 to 5, wherein the air cleaner device is integrally formed with the cleaner case (51), is coupled to the opening (61) of the partition wall (53), and goes upward. Accordingly, the air cleaner apparatus includes an intake duct (58) having an open end (58a) that is away from a virtual plane (59) including a mating surface of the cleaner case (51) and the partition wall (53).

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