JP6897322B2 - Motorcycle air cleaner - Google Patents

Description

The present invention relates to an air cleaner for a motorcycle.

Air cleaners are known that have a single holding piece that hangs from the cover, passes between the filter element and the funnel, and holds the frame of the filter element against the bulkhead of the lower case.

The frame of the filter element is attached to the partition wall of the lower case by screwing a screw body inserted into the hollow portion of the holding piece into the screw hole of the partition wall (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-227996

Conventional air cleaners include struts such as holding pieces that traverse (cross) between the filter element and the funnel, particularly struts with hollow portions through which screws can be inserted. Such struts impede the flow of clean air through the filter element towards the funnel, increasing the intake resistance of the engine and thus impeding the increase in engine output.

Therefore, the present invention provides an air cleaner for a motorcycle that keeps the flow of clean air passing through the filter element toward the funnel smoothly without obstructing it, reduces the intake resistance of the engine, and improves the output of the engine. The purpose is to do.

In order to solve the above problems, the motorcycle air cleaner according to the present invention includes a case body, a lid that closes the case body, a fastening member that fixes the lid body to the case body, the case body, and the case body. a funnel to flow out and a filter dividing the internal space is accommodated in an inner space delimited by the lid to the dirty side and clean side, projects into the interior space, and the air passing through the filter over from the internal space, A convex portion provided on the entire circumference of the edge portion of the case body, a concave portion provided on the entire circumference of the edge portion of the lid body into which the convex portion enters, and a concave portion sandwiched between the convex portion and the concave portion. The filter includes a seal member, the filter includes a filter element that filters the air flowing into the internal space, and a frame that supports the filter element on the case body, and the lid body is the fastening member. It has a tightening seat portion in which a hole for inserting the lid is formed and is recessed inside the lid body, and a pressing portion that protrudes from the tightening seat portion and presses the frame body against the case body. parts are the nearest filter element to the inner wall surface of the case body than the funnel in flow passage of air flowing into the funnel, and are integrated with the seat fastening, said hole and said pressing portion, said in between the convex portion and the concave portion traversing the tightening seat that is adjacent.

According to the present invention, it is possible to keep the flow of clean air passing through the filter element toward the funnel smoothly without obstructing it, reduce the intake resistance of the engine, and improve the output of the engine.

The left side view which shows the motorcycle to which the air cleaner which concerns on embodiment of this invention is applied. The perspective view of the air cleaner of the motorcycle which concerns on embodiment of this invention. FIG. 3 is a perspective view of a motorcycle air cleaner according to an embodiment of the present invention in a state where the lid is opened. The perspective view of the lid body of the air cleaner of the motorcycle which concerns on embodiment of this invention. The vertical sectional view of the air cleaner of the motorcycle which concerns on embodiment of this invention.

Hereinafter, embodiments of the motorcycle air cleaner according to the present invention will be described with reference to FIGS. 1 to 5. In the plurality of drawings, the same or corresponding configurations are designated by the same reference numerals.

FIG. 1 is a left side view showing a motorcycle to which the air cleaner according to the embodiment of the present invention is applied.

The front-rear, up-down, and left-right expressions in the present embodiment are based on the occupant of the motorcycle 1.

As shown in FIG. 1, the motorcycle 1 according to the present embodiment includes a vehicle body frame 2 extending forward and backward, a front wheel 5 arranged in front of the vehicle body frame 2, and a front wheel 5 arranged at the front end portion of the vehicle body frame 2. A steering mechanism 6 that rotatably supports the rear wheels 7, a rear wheel 7 that is arranged behind the vehicle body frame 2, a swing arm 8 that is arranged at the rear of the vehicle body frame 2 and rotatably supports the rear wheels 7, and a vehicle body frame 2. It is equipped with an internal combustion engine 9 (hereinafter, simply referred to as "engine 9") to be mounted.

Further, the motorcycle 1 includes a fuel tank 11 arranged above the front half of the body frame 2 to store fuel supplied to the engine 9, an air cleaner 12 for purifying the air sucked into the engine 9, and a body frame 2. It is provided with a seat 13 that is arranged above the latter half of the vehicle body and seats a passenger, and a vehicle body cover 15 that covers a part of the vehicle body frame 2.

The body frame 2 is a so-called cradle type. The body frame 2 includes a plurality of steel hollow tubes that are integrally combined. That is, the vehicle body frame 2 includes a head pipe 21, a main tube 22, a down tube 23, a pair of left and right seat rails 25, and a pair of left and right seat pillars 26.

The head pipe 21 is arranged in the upper part of the front end of the vehicle body frame 2. The head pipe 21 supports the steering mechanism 6 so as to be steerable in the left-right direction of the vehicle.

The main tube 22 extends obliquely backward and downward from the front end portion connected to the upper rear surface of the head pipe 21, is curved in the middle, and hangs downward.

The down tube 23 extends rearward while inclining further downward than the main tube 22 from the front end portion connected to the lower rear surface of the head pipe 21, and curves in the middle toward the rear.

The pair of left and right seat rails 25 branch from the front end portion connected to the curved portion of the main tube 22, and extend diagonally backward and upward with a gentle inclination.

The pair of left and right seat pillars 26 branch from the front end connected to the lower end of the main tube 22, extend diagonally backward and upward, and join the intermediate portion of the length of the seat rail 25 to join the seat rail 25. Supports.

The steering mechanism 6 has a suspension mechanism (not shown) incorporated therein, and has a pair of left and right front forks 27 that rotatably support the front wheels 5, a front fender 28 that covers above the front wheels 5, and the top of the front forks 27. It includes a handle 29 to be fixed.

The front wheel 5 is sandwiched between the left and right front forks 27 and rotates about an axle erected at the lower ends of the left and right front forks 27.

The swing arm 8 is supported by a pivot shaft (not shown) provided on the vehicle body frame 2 and can swing in the vertical direction. An axle that rotatably supports the rear wheels 7 is provided at the rear end of the swing arm 8. The rear cushion unit 31 is erected between the vehicle body frame 2 and the swing arm 8. The rear cushion unit 31 buffers the force transmitted from the rear wheels 7 to the vehicle body frame 2.

The drive chain 32 transmits the output of the engine 9 to the rear wheels 7 to rotate the rear wheels 7.

The engine 9 is arranged between the main tube 22 and the down tube 23, and is fixed to the main tube 22 and the down tube 23.

An oil cooler 33 for cooling the lubricating oil for lubricating and cooling each part of the engine 9 is provided diagonally forward and upward above the engine 9. The oil cooler 33 is preferably arranged so as to avoid the positions where the front fender 28 and the front wheels 5 face the front so as to be easily exposed to the traveling wind of the motorcycle 1.

The fuel tank 11 is exclusively supported by the main tube 22. The fuel tank 11 swells from immediately after the head pipe 21 to the vicinity of the front end portion of the seat rail 25.

The air cleaner 12 is arranged above the engine 9 and below the main tube 22. The air cleaner 12 is a part of the intake path of the engine 9, and is connected to the intake side of the engine 9 via a throttle body (not shown). The air cleaner 12 filters and cleans the intake air.

The seat 13 is provided behind the fuel tank 11. The seat 13 straddles the left and right seat rails 25 and reaches the rear end portion of the seat rail 25.

The vehicle body cover 15 includes a front cover 35 made of synthetic resin, a pair of left and right side covers 36, and a rear cover 37, respectively.

The front cover 35 is provided in front of the head pipe 21. The front cover 35 is fixed to the steering mechanism 6.

The side cover 36 is connected to the lower rear portion of the fuel tank 11, extends in an inverted triangle over the main tube 22, the seat rail 25, and the seat pillar 26, and sandwiches them from the left and right.

The rear cover 37 is connected to the lower ends of the left and right side surfaces of the latter half of the seat 13 and extends rearward, and extends to the rear of the seat 13 to join.

FIG. 2 is a perspective view of an air cleaner for a motorcycle according to an embodiment of the present invention.

FIG. 3 is a perspective view of a motorcycle air cleaner according to an embodiment of the present invention in a state where the lid is opened.

FIG. 4 is a perspective view of a lid of an air cleaner for a motorcycle according to an embodiment of the present invention.

FIG. 5 is a vertical sectional view of an air cleaner for a motorcycle according to an embodiment of the present invention.

As shown in FIGS. 2 to 5, the air cleaner 12 of the motorcycle 1 according to the present embodiment is fastened to fix the case body 41, the lid body 42 that closes the case body 41, and the lid body 42 to the case body 41. A member 43 and a filter 48 housed in an internal space 45 separated by a case body 41 and a lid 42 and dividing the internal space 45 into a dirty side 46 and a clean side 47 are provided. The air cleaner 12 can take out the filter 48 from the case main body 41 and replace it by removing the lid body 42 from the case main body 41.

Further, the air cleaner 12 includes a funnel 49 arranged on the downstream side of the filter 48, that is, on the clean side 47.

A combination of the case body 41 and the lid 42 is called a cleaner box 51. The cleaner box 51 is a substantially rectangular parallelepiped box body. The cleaner box 51 is long in the front-rear direction while being mounted on the motorcycle 1. The joint surface 51a between the case body 41 and the lid 42 is closer to the bottom surface in the height direction of the cleaner box 51.

The case body 41 includes an inlet 52 that guides air to the internal space 45, and an outlet 53 that allows air to flow out of the internal space 45. The entrance 52 is provided in the central portion of the front surface of the case body 41. The outlet 53 is bored in the bottom wall of the latter half of the case body 41. One outlet 53 is provided for each cylinder (not shown) of the engine 9. That is, the number of outlets 53 is the same as the number of cylinders of the engine 9.

A seat 55 that supports the filter 48 is provided in the front half of the case body 41. The seat 55 is the boundary between the dirty side 46 and the clean side 47. The entrance 52 side of the seat 55 is the dirty side 46, and the exit 53 side of the seat 55 is the clean side 47. The seat portion 55 is arranged inside the case main body 41 with respect to the joint surface 51a of the cleaner box 51, that is, the joint surface 51a between the case main body 41 and the lid body 42. In other words, the seat 55 is closer to the bottom wall of the case body 41.

A convex portion 41a is provided on the edge of the case body 41 over the entire circumference. The edge of the lid 42 is provided with a recess 42a into which the convex portion 41a of the case body 41 enters over the entire circumference. The concave portion 42a of the lid body 42 is provided with a seal member 56 sandwiched between the convex portion 41a of the case body 41 and the convex portion 41a of the lid body 42.

Further, a boss portion 57 to which the fastening member 43 is tightened is provided on the inner portion of the edge portion of the case body 41.

The lid body 42 has a larger height dimension than the case body 41, and secures a sufficient volume of the clean side 47. The inner wall surface 42b of the lid body 42 is provided with a plurality of lid body reinforcing ribs 58 for reinforcing the wall portion of the lid body 42. The plurality of lid body reinforcing ribs 58 include those extending in the front-rear direction, those extending in the left-right direction, and those extending in the vertical direction of the lid body 42. The plurality of lid reinforcing ribs 58 intersect in a grid shape.

A flange portion 59 is provided on the edge portion of the lid body 42. The recess 42a is provided on the joint surface of the flange portion 59.

A pair of hooks 61 are provided on the front portion of the lid body 42. A pair of hook receivers 62 for hooking the hooks 61 of the lid 42 are provided on the front portion of the case body 41.

There are a plurality of fastening members 43. The fastening member 43 is arranged around the lid body 42 and the case body 41. Specifically, the fastening member 43 cooperates with the hook 61 of the lid body 42 and the hook receiver 62 of the case body 41 to fix the lid body 42 to the case body 41. The fastening member 43 is a pair of first fastening members 43a arranged at the center of each side of the air cleaner 12 to fix the lid 42 to the case body 41, and the left and right corners of the rear end of the air cleaner 12. It includes a pair of second fastening members 43b, which are arranged in the portion and fix the lid body 42 to the case main body 41. Both the first fastening member 43a and the second fastening member 43b are tightened to the outside of the seal member 56 sandwiched between the convex portion 41a of the case body 41 and the convex portion 41a of the lid body 42.

The filter 48 includes a filter element 65 that filters air flowing into the case body 41, that is, the internal space 45, and a frame body 66 that supports the filter element 65 on the case body 41.

A convex portion 66a is provided on the edge of the frame body 66 over the entire circumference. The seat portion 55 in the case body 41 is provided with a recess 55a into which the convex portion 66a of the frame body 66 enters. The recess 55a of the case body 41 is provided with a seal member 67 sandwiched between the convex portion 66a of the frame body 66 and the recess 55a of the case body 41. That is, the seat portion 55 of the case body 41 supports the entire filter 48 by holding the frame body 66.

The frame body 66 includes a first side portion 71 extending so as to traverse the inside of the case main body 41, a second side portion 72 along the inner wall surface 41b of the case main body 41, and a first side portion 71 and a second side portion 72. It has a pair of third side portions 73 that connect the two.

The first corner portion 75 of the first side portion 71 and the third side portion 73 follows the shape of the boss portion 57 of the case body 41. Specifically, a recess 88a that matches the shape of the boss portion 57 is provided on the third side portion 73 side of the first corner portion 75. The second corner portion 76 of the second side portion 72 and the third side portion 73 has a shape that fits the front corner portion of the case body 41.

The lid body 42 has a tightening seat portion 79 that has a hole 78 through which the fastening member 43 is inserted and is recessed inside the lid body 42, and a frame body 66 of the filter 48 that protrudes from the lid body 42 and is pressed against the case body 41. It is provided with a plurality of pressing portions 81 to be attached.

The plurality of pressing portions 81 are arranged along the inner wall surface 41b of the case main body 41. Specifically, the plurality of pressing portions 81 include the first pressing portion 82 that presses the first corner portion 75 of the first side portion 71 and the third side portion 73 of the frame body 66, and the second side portion 72. It includes a second pressing portion 83 that presses the second corner portion 76 with the third side portion 73. The plurality of pressing portions 81 are pressed against the frame body 66 by the fastening force of the fastening member 43 acting via the lid body 42.

The first pressing portion 82 is closer to the inner wall surface 41b of the case body 41 than the funnel 49 in the air flow path (practical arrow f in the figure) flowing from the filter element 65 to the funnel 49. Further, the first pressing portion 82 is integrated with the tightening seat portion 79. Further, the first pressing portion 82 overlaps the boss portion 57 of the case body 41 in the flow direction of the air flowing from the filter element 65 to the funnel 49. The first pressing portion 82 presses the seal member 67 through the frame body 66. The flange portion 59 is integrated with the tightening seat portion 79 and the first pressing portion 82.

The second pressing portion 83 is arranged so as to sandwich the filter element 65 with the funnel 49. The second pressing portion 83 projects from the lid 42 and presses the frame 66 of the filter 48 against the case body 41. The second pressing portion 83 presses the seal member 67 through the frame body 66 like the first pressing portion 82.

The second pressing portion 83 has a solid pillar shape extending so as to hang down from the inner wall surface 42b of the lid 42, which is the ceiling of the cleaner box 51, toward the frame 66 of the filter 48. Further, the second pressing portion 83 has a reinforcing rib 84 extending in the length direction thereof. Reinforcing ribs 84 are provided on all four sides of a rod-shaped central portion.

The frame body 66 of the filter 48 includes a pressed portion 86 in contact with the pressing portion 81. The pressed portion 86 is provided corresponding to each pressing portion 81. That is, there are a plurality of pressed portions 86, and the first pressed portion 87 is provided at the first corner portion 75 of the first side portion 71 and the third side portion 73 and is pressed against the first pressing portion 82. , A second pressed portion 88 provided at the second corner portion 76 of the second side portion 72 and the third side portion 73 and pressed against the second pressing portion 83.

The funnel 49 causes the air that has passed through the filter element 65 to flow out of the internal space 45. The funnel 49 guides the air purified by the filter 48 to the intake port (not shown) of the engine 9.

The funnel 49 is connected to the outlet 53 of the case body 41 and projects into the internal space 45. Funnels 49 are provided at each outlet 53 of the case body 41. That is, one funnel 49 is provided for each cylinder (not shown) of the engine 9 as well as the outlet 53. The number of funnels 49 is the same as the number of cylinders of the engine 9. For example, the engine 9 according to the present embodiment is a parallel two-cylinder engine, and there are two outlets 53 and two funnels 49, which are arranged in a straight line. The outlet 53 and the funnel 49 may be one by one. That is, the engine 9 to which the air cleaner 12 is applied may be a single cylinder.

The air cleaner 12 of the motorcycle 1 according to the present embodiment is closer to the inner wall surface 41b of the case body 41 than the funnel 49 in the air flow path from the filter element 65 to the funnel 49, and is integrated with the tightening seat portion 79. The pressing portion 81 to be pressed is provided. Therefore, the air cleaner 12 does not require a support like a holding piece in the conventional air cleaner in the air flow path in order to fix the filter 48. That is, the air cleaner 12 smoothes the flow of clean air passing through the filter element 65 toward the funnel 49 without obstructing it, reduces the intake resistance of the engine 9, and contributes to the improvement of the output of the engine 9. .. Moreover, the air cleaner 12 can effectively transmit the tightening load of the fastening member 43 acting on the tightening seat portion 79 from the pressing portion 81 to the frame body 66 of the filter 48 to firmly fix the filter 48.

By the way, in the conventional air cleaner of a motorcycle, there is a possibility that fine dust is accumulated in the hollow portion of the holding piece. If the screw is pulled out from the holding piece while the dust is accumulated in the hollow part, for example, to replace the filter element, the dust accumulated in the hollow part may spill to the clean side of the air cleaner through the hole through which the screw is inserted. Give rise. If dust spilled on the clean side is sucked into the engine, it may adversely affect the engine. On the other hand, since the air cleaner 12 of the motorcycle 1 according to the present embodiment holds the filter 48 pressed against the case body 41 by the pressing portion 81, it does not require a hole leading to the internal space 45 of the cleaner box 51. .. Therefore, unlike the conventional air cleaner for motorcycles, the air cleaner 12 does not spill dust into the internal space 45 of the cleaner box 51 when the fastening member 43 is inserted or removed. In other words, the air cleaner 12 does not contaminate the clean side 47 when the fastening member 43 is inserted or removed.

Further, the air cleaner 12 of the motorcycle 1 according to the present embodiment includes a flange portion 59 integrated with the tightening seat portion 79 and the pressing portion 81 and provided on the edge of the lid 42. Therefore, the air cleaner 12 can increase the support rigidity of the pressing portion 81. That is, the air cleaner 12 can more reliably transmit the tightening load of the fastening member 43 acting on the tightening seat portion 79 to the pressing portion 81, and can secure the holding force (holding force) of the filter 48.

Furthermore, the air cleaner 12 of the motorcycle 1 according to the present embodiment includes a pressing portion 81 that overlaps the boss portion 57 of the case body 41 in the flow direction of the air flowing from the filter element 65 to the funnel 49. Therefore, in the air cleaner 12, even if an air flow occurs along the inner wall surface 41b of the case body 41, the pressing portion 81 does not block the air flow.

Further, the air cleaner 12 of the motorcycle 1 according to the present embodiment is arranged with the filter element 65 sandwiched between the funnel 49 and the second pressing that protrudes from the lid 42 and presses the frame 66 against the case body 41. The part 83 is provided. Therefore, the air cleaner 12 holds the filter 48 more firmly against the seat 55 of the case body 41 without obstructing the air flow in the air flow path from the filter element 65 to the funnel 49. be able to.

Further, the air cleaner 12 of the motorcycle 1 according to the present embodiment includes a pressing portion 81 that presses the seal member 67 through the frame body 66 of the filter 48. Therefore, the air cleaner 12 can surely stop the leakage of air between the frame body 66 of the filter 48 and the seat portion 55 of the case body 41, and can firmly fix the filter 48.

Therefore, according to the air cleaner 12 of the motorcycle 1 according to the present embodiment, the flow of clean air passing through the filter element 65 and toward the funnel 49 is kept smooth without being obstructed, and the intake resistance of the engine 9 is reduced. The output of the engine 9 is improved.

1 ... Motorcycle, 2 ... Body frame, 5 ... Front wheel, 6 ... Steering mechanism, 7 ... Rear wheel, 8 ... Swing arm, 9 ... Internal combustion engine, 9 ... Engine, 11 ... Fuel tank, 12 ... Air cleaner, 13 ... Seat, 15 ... Body cover, 21 ... Head pipe, 22 ... Main tube, 23 ... Down tube, 25 ... Seat rail, 26 ... Seat pillar, 27 ... Front fork, 28 ... Front fender, 29 ... Handle, 31 ... Rear cushion Unit, 32 ... drive chain, 33 ... oil cooler, 35 ... front cover, 36 ... side cover, 37 ... rear cover, 41 ... case body, 41a ... convex, 41b ... inner wall surface, 42 ... lid, 42a ... concave, 42b ... Inner wall surface, 43 ... Fastening member, 43a ... First fastening member, 43b ... Second fastening member, 45 ... Internal space, 46 ... Dirty side, 47 ... Clean side, 48 ... Filter, 49 ... Funnel, 51 ... Cleaner Box, 51a ... Joint surface, 52 ... Entrance, 53 ... Exit, 55 ... Seat, 55a ... Recess, 56 ... Seal member, 57 ... Boss, 58 ... Lid reinforcement rib, 59 ... Flange, 61 ... Hook, 62 ... Hook receiver, 65 ... Filter element, 66 ... Frame body, 66a ... Convex part, 67 ... Seal member, 71 ... First side part, 72 ... Second side part, 73 ... Third side part, 75 ... First Corner part, 76 ... Second corner part, 78 ... Hole, 79 ... Tightening seat part, 81 ... Pressing part, 82 ... First pressing part, 83 ... Second pressing part, 84 ... Reinforcing rib, 86 ... Pressed part , 87 ... 1st pressed portion, 88 ... 2nd pressed portion.

Claims (7)

With the case body
A lid that closes the case body and
A fastening member for fixing the lid body to the case body, and
A filter that is housed in the internal space separated by the case body and the lid and divides the internal space into a dirty side and a clean side.
A funnel to flow out projects into the interior space, and the air passing through the filter over from the internal space,
Convex portions provided on the entire circumference of the edge of the case body,
A recess provided on the entire circumference of the edge of the lid and into which the convex portion enters,
A seal member sandwiched between the convex portion and the concave portion is provided.
The filter has a filter element that filters the air flowing into the internal space, and a frame that supports the filter element on the case body.
The lid has a tightening seat portion in which a hole through which the fastening member is inserted is formed and is recessed inside the lid body, and a pressing portion that protrudes from the tightening seat portion and presses the frame body against the case body. And have
The pressing portion is closer to the inner wall surface of the case body than the funnel in the flow path of air flowing from the filter element to the funnel, and is integrated with the tightening seat portion .
Wherein the pressing portion includes a motorcycle air cleaner that is adjacent in between the convex portion and the concave portion across said fastening seat and the hole. A seat portion provided in the case body and supporting the filter is provided.
The air cleaner for a motorcycle according to claim 1, wherein the seat portion is arranged inside the case body with respect to the joint surface between the case body and the lid body. The air cleaner for a motorcycle according to claim 1 or 2, further comprising a flange portion provided on the edge portion of the lid and integrated with the tightening seat portion and the pressing portion. A boss portion provided on the case body and for tightening the fastening member is provided.
The motorcycle air cleaner according to any one of claims 1 to 3, wherein the pressing portion overlaps the boss portion in the flow direction of air flowing from the filter element to the funnel. The invention according to any one of claims 1 to 4, wherein the filter element is arranged between the funnel and the filter element, and the case body is provided with a second pressing portion that protrudes from the lid and presses the frame against the case body. Motorcycle air cleaner. A second seal member sandwiched between the frame body and the case body is provided.
The air cleaner for a motorcycle according to any one of claims 1 to 5, wherein the pressing portion presses the second seal member through the frame body. The motorcycle air cleaner according to any one of claims 1 to 6, wherein the funnel is provided.

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