JP2020147242A - Air cleaner structure in saddle riding vehicle - Google Patents

Abstract

To provide an air cleaner structure in which a cleaner case of an air cleaner is provided on a side part of one side of a vehicle width direction of a rear wheel, an inlet duct having a suction hole on a front end part thereof is provided on the cleaner case so as to suck air into a non-purification chamber in the cleaner case, and affection of an air flow flung by the rear wheel can be suppressed for enhancing suction efficiency of air into the air cleaner.SOLUTION: A duct cover 36 covering an inlet duct 35 from the other side in a vehicle width direction, covering at least a part of the inlet duct 35 from a front side in a vehicle cross direction, and having an opening 37 on one side in the vehicle width direction, is provided on a cleaner case 25. An external surface of a front wall part 27d covering the inlet duct 35 on the duct cover 36 from a front side in the vehicle cross direction, comprises first ribs 41, 42 along the vehicle cross direction.SELECTED DRAWING: Figure 3

Description

In the present invention, the cleaner case of the air cleaner is arranged on one side of the rear wheel in the vehicle width direction, and the intake duct having the intake port at the front end sucks air into the unpurified chamber in the cleaner case. The present invention relates to a saddle-riding vehicle provided in the cleaner case, and particularly to an improvement of an air cleaner structure.

It is known in Patent Document 1 that a cleaner case of an air cleaner arranged on one side of the rear wheel of a scooter type motorcycle in the vehicle width direction is provided with an intake duct projecting forward from the cleaner case. ..

Japanese Unexamined Patent Publication No. 2018-075967

In order to prevent dust and water from entering the intake duct protruding from the cleaner case from the front in the front-rear direction of the vehicle, the intake duct is covered from the other side in the vehicle width direction, that is, the rear wheel side, and at least a part of the intake duct. It is conceivable to cover the vehicle from the front in the front-rear direction of the vehicle and to provide an opening for sucking air into the intake duct on the side opposite to the rear wheel of the duct cover. However, when the air cleaner is placed on one side of the rear wheels, the air wound up by the rotation of the rear wheels forms a flow toward the front and the surroundings in the front-rear direction of the vehicle, so that the air flow is the opening of the duct cover. The problem arises that the intake of air from the air to the intake duct is hindered and the efficiency of air intake to the air cleaner is reduced.

The present invention has been made in view of such circumstances, and provides an air cleaner structure in a saddle-type vehicle capable of suppressing the influence of the air flow wound up by the rear wheels and increasing the intake efficiency of air into the air cleaner. With the goal.

In order to achieve the above object, in the present invention, the cleaner case of the air cleaner is arranged on one side of the rear wheel in the vehicle width direction, and the intake duct having the intake port at the front end is unpurified in the cleaner case. In a saddle-mounted vehicle provided in the cleaner case so as to suck air into the chamber, the intake duct is covered from the other side in the vehicle width direction, and at least a part of the intake duct is covered from the front in the front-rear direction of the vehicle. A duct cover having an opening formed on one side in the vehicle width direction is provided on the cleaner case, and is along the vehicle front-rear direction on the outer surface of the front wall portion of the duct cover that covers the intake duct from the front in the vehicle front-rear direction. The first feature is that the first rib is erected.

Further, in addition to the configuration of the first feature, the present invention has a second aspect in which the outer surface of the front wall portion of the duct cover is connected to the rear end portion of the first rib along the vehicle front-rear direction and extends along the vehicle width direction. The second feature is that the two ribs are erected so as to project upward.

In the present invention, in addition to the configuration of the first or second feature, at least a part of the first rib is inclined so as to approach the rear wheel in the vehicle width direction from the rear in the front-rear direction to the front of the vehicle. The third feature is that the portion is provided.

The fourth feature of the present invention is that, in addition to the configuration of the third feature, the inclined portion is arranged at a position corresponding to the intake port of the intake duct when viewed from the front in the front-rear direction of the vehicle.

In the present invention, in addition to the configuration of the third or fourth feature, a plurality of the first ribs are provided in the vehicle width direction, and among the first ribs, the first rib closest to the rear wheel in the vehicle width direction. However, the fifth feature is that the inclined portion is provided on the first rib which is formed in a straight line along the vehicle front-rear direction and is located at the position farthest from the rear wheel in the vehicle width direction.

Further, in the present invention, in addition to any of the configurations of the first to fifth features, a third rib protruding outward in the vehicle width direction at a rear portion in the vehicle front-rear direction of the peripheral edge of the opening of the duct cover. The sixth feature is that is provided.

According to the first feature of the present invention, the air flow generated by the hoisting of air by the rotating rear wheels can be received by the first rib, so that this air flow is taken in from the opening of the duct cover. It does not obstruct the flow of air sucked into the air cleaner through the duct, which enhances the efficiency of air sucking into the air cleaner.

Further, according to the second feature of the present invention, by abutting the air flow received by the first rib against the second rib, the air flow is vertically upward so as not to affect the intake of air into the air cleaner. It can be released and the efficiency of air intake into the air cleaner can be increased.

According to the third feature of the present invention, the air flow received by the first rib is changed in the direction away from the opening of the duct cover by the inclined portion, so that the air flow from the opening to the intake duct. The flow of the sucked air is not obstructed, and the efficiency of sucking air into the air cleaner is further improved.

According to the fourth feature of the present invention, the air flow is more positively flowed to the side away from the intake port by the inclined portion at the position corresponding to the intake port of the intake duct when viewed from the front in the front-rear direction of the vehicle. This further enhances the efficiency of air intake into the air cleaner.

According to the fifth feature of the present invention, among the plurality of first ribs, the first rib closest to the rear wheels in the vehicle width direction is formed in a straight line along the vehicle front-rear direction, and the air flow from the rear wheels. The reception of air is prioritized over the induction of air, and this reception of air enhances the efficiency of air intake into the air cleaner.

Further, according to the sixth feature of the present invention, a part of the traveling wind flowing from the front to the rear in the front-rear direction of the vehicle is received by the third rib and guided from the opening of the duct cover to the intake duct side. The efficiency of air intake into the air cleaner is further improved.

It is a partially broken side view of a scooter type motorcycle. It is a perspective view of the scouter type motorcycle with the body frame and the body cover omitted. It is a perspective view which looked at a part of an air cleaner from the front. It is a front view of an air cleaner. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG.

An embodiment of the present invention will be described with reference to FIGS. 1 to 6 attached. In the following description, up and down, front and rear, and left and right refer to the directions seen by the occupant riding the scooter type motorcycle.

First, in FIG. 1, a front fork 8 that pivotally supports the front wheel WF at the lower end is operably supported at the front end of the body frame F of a scooter-type motorcycle, which is a saddle-riding vehicle, and is supported by the front fork 8. The steering handle 9 is connected.

With reference to FIG. 2, a unit swing type power unit 12 is supported in the middle portion of the vehicle body frame F in the vehicle front-rear direction so as to be able to swing up and down. The unit swing type power unit 12 includes an engine 13 and an engine 13. It is composed of a V-belt type automatic transmission (not shown) and a road power transmission mechanism (not shown) housed in a transmission case 14 extending rearward from the engine body 13a of the engine 13. A rear wheel WR is rotatably supported at the rear end of the transmission case 14. Further, a rear cushion unit 16 is provided between the rear end portion of the transmission case 14 and the rear end portion of the vehicle body frame F.

By the way, one side of the rear wheel WR in the vehicle width direction, in this embodiment, the side where the transmission case 14 of the unit swing type power unit 12 is arranged with respect to the rear wheel WR, that is, the left side of the rear wheel WR (FIG. 1). And on the front side of FIG. 2), an air cleaner 20 constituting the upstream end portion of the intake system 10 of the engine 13 is arranged. The air cleaner 20 is supported by the transmission case 14 and is arranged above the transmission case 14.

The intake system 10 opens at the rear of the air cleaner 20, a connecting tube 21 for guiding clean air from the air cleaner 20, a throttle body 22 connected to the downstream end of the connecting tube 21, and the engine body 13a. An intake port (not shown) and an intake pipe 23 connecting between the throttle bodies 22 are provided.

Further, as shown in FIG. 2, the engine 13 is located on the side where the rear wheel WR is sandwiched between the rear wheel WR and the air cleaner 20 in the vehicle width direction, that is, on the right side of the rear wheel WR (the back side of FIGS. 1 and 2). The exhaust muffler 18 constituting the downstream end of the exhaust system 11 is arranged.

The exhaust system 11 is connected to an exhaust port (not shown) that opens in the front portion of the engine body 13a, extends to the rear on the right side of the engine body 13a, and is downstream of the exhaust pipe 24. The exhaust muffler 18 connected to the end portion is provided.

With reference to FIGS. 3 to 6, the cleaner case 25 of the air cleaner 20 is formed by joining half-split first and second case halves 26 and 27, and is made of resin. 26 is arranged on the left side of the rear wheel WR near the rear wheel WR (inside), and the resin second case half body 27 is arranged on the side far from the rear wheel WR (outside).

The first case half body 26 is formed in an open bowl shape on the side opposite to the rear wheel WR, that is, on the side of the second case half body 27, and the first case half body 26 has a first peripheral portion at the open end. 1 Flange portion 26a is integrally formed.

On the other hand, the second case half body 27 is arranged on the rear side of the front wall portion 26b at the front end along the vehicle front-rear direction of the first case half body 26, and is a vertical wall portion 27ba extending in the vehicle width direction and the vertical direction. A bowl-shaped portion 27b that is open to the side of the first case half body 26 while having a front end portion along the vehicle front-rear direction, and an inner end portion of the vertical wall portion 27ba that extends in the vehicle front-rear direction and the vertical direction. A second flange portion 27a corresponding to the first flange portion 26a is formed on the peripheral edge portion of the second case half body 27 on the side of the first case half body 26 so as to integrally have a side wall portion 27c connected to the first case half body 27. Are formed integrally. The first flange portion 26a and the second flange portion 27a are fastened with a plurality of screw members 28, whereby the cleaner case 25 is formed.

A partition plate 30 having a cleaner element 29 is sandwiched between the first case half body 26 and the second case half body 27, and the cleaner element 29 and the partition plate 30 are inside the cleaner case 25. An unpurified chamber 31 into which air from the outside is introduced and a purified chamber 32 into which purified air flows through the cleaner element 29 are formed so as to be partitioned. The connecting tube 21 in the intake system 10 penetrates the front wall portion 26b of the first case half body 26 and is attached to the front wall portion 26b, and is housed in the purification chamber 32. The upstream end of the connecting tube 21 is connected to the air conduit 33 fixed to the one-case half body 26.

In the vertical wall portion 27ba which is the front wall of the unpurified chamber 31, an intake duct 35 having an intake port 35a at the front end portion sucks air into the unpurified chamber 31 from the vertical wall portion 27ba. At least a part (a part in this embodiment) is provided so as to project forward in the front-rear direction of the vehicle.

The second case half body 27 of the cleaner case 25 is provided with a duct cover 36 that covers at least a part of the intake duct 35 from the front in the vehicle front-rear direction while covering the intake duct 35 from the other side in the vehicle width direction. .. In this embodiment, the duct cover 36 has the side wall portion 27c of the second case half body 27 and the vertical wall portion of the side wall portion 27c while having a cross-sectional shape bulging toward the front in the front-rear direction of the vehicle. The front wall portion 27d projecting from the peripheral edge portion excluding the portion connected with 27ba to one side in the vehicle width direction is integrally connected, and the duct cover 36 is integrally connected to one side in the vehicle width direction, that is, the rear wheel WR. On the opposite side, an opening 37 for guiding air to the intake duct 35 side is formed.

In this embodiment, the duct cover 36 is integrally formed with the second case half body 27, but a duct cover of a member different from the cleaner case may be attached to the cleaner case.

By the way, when the scooter-type motorcycle is running, the rear wheel WR rotates in the direction indicated by the arrow 40 in FIG. A flow occurs. When the air flow accompanying the rotation of the rear wheel WR hinders the intake of air from the opening 37 of the duct cover 36 into the intake duct 35, the efficiency of air intake into the air cleaner 20 decreases. Therefore, a plurality of first ribs arranged in the vehicle width direction, two first ribs 41 and 42 in this embodiment, are erected on the outer surface of the front wall portion 27d of the duct cover 36 so as to be along the vehicle front-rear direction. Will be done.

Of the first ribs 41 and 42, the first rib 41 located closest to the rear wheel WR in the vehicle width direction is formed in a straight line along the vehicle front-rear direction. On the other hand, of the first ribs 41 and 42, at least a part of the near first rib 41 located at the position farthest from the rear wheel WR in the vehicle width direction, in this embodiment, in the vertical intermediate portion of the first rib 42. Is provided with an inclined portion 42a that inclines so as to approach the rear wheel WR in the vehicle width direction from the rear in the front-rear direction to the front of the vehicle. Moreover, the inclined portion 42a is arranged at a position corresponding to the intake port 35a of the intake duct 35 when viewed from the front in the front-rear direction of the vehicle.

Further, on the outer surface of the front wall portion 27d of the duct cover 36, the second rib 43 that is connected to the rear ends of the two left and right first ribs 41 and 42 and extends along the vehicle width direction protrudes upward. It is erected.

Further, a third rib 44 projecting outward in the vehicle width direction is provided on the rear side portion in the vehicle front-rear direction of the peripheral edge of the opening 37 of the duct cover 36.

Next, the operation of this embodiment will be described. Assuming that the rotation of the rear wheel WR causes an air flow that flows outward in the vehicle width direction around the air cleaner 20 as shown by the arrow a in FIG. 3, the duct cover 36 Since two first ribs 41 and 42 are erected on the outer surface of the front wall portion 27d along the vehicle width direction and along the vehicle front-rear direction, the air flow from the rear wheel WR is supplied by these first ribs 41 and 42. It will be possible to accept it.

That is, as shown by the arrow a, the flow of air flowing outward in the vehicle width direction collides with the first rib 41 of the two first ribs 41 and 42 on the side closer to the rear wheel WR and is blocked, and the first rib is blocked. A part of the air colliding with 41 is directed diagonally upward along the first rib 41 as shown by arrow b, and the remaining air is directed downward along the first rib 41 as shown by arrow c. ..

Further, some of the air that was not blocked by the first rib 41 on the side closer to the rear wheel WR collided with the first rib 42 on the outer side in the vehicle width direction from the first rib 42 and was blocked by the first rib 42. A part of the collided air is directed diagonally upward along the first rib 41 as shown by the arrow c, and the remaining air is directed downward along the first rib 42 as shown by the arrows d and e. Become.

Therefore, the flow of air from the rear wheel WR is prevented from flowing to the opening 37 side of the duct cover 36, and the air sucked into the air cleaner 30 from the opening 37 of the duct cover 36 via the intake duct 35. The flow of air is not obstructed, and the efficiency of air intake into the air cleaner 20 is improved.

Further, on the outer surface of the front wall portion 27d of the duct cover 36, the second rib 43 that is connected to the rear ends of the first ribs 41 and 42 along the vehicle front-rear direction and extends along the vehicle width direction protrudes upward. It is erected in. Therefore, the air that collides with the first ribs 41 and 42 and heads diagonally upward will hit the second rib 43 as shown by the arrows g and h in FIG. 3, and the air is sucked into the air cleaner 20. The air flow can be released vertically upward, which does not affect the air cleaner 20, and the efficiency of air intake into the air cleaner 20 can be improved.

Further, of the two first ribs 41 and 42 arranged in the vehicle width direction, at least a part of the first rib 42 on the side farther from the rear wheel WR is the rear wheel WR in the vehicle width direction from the rear to the front in the vehicle front-rear direction. Since the inclined portion 42a is provided so as to approach the duct cover 36, the air going downward along the first rib 42 is changed in the direction away from the opening 37 of the duct cover 36 as shown by the arrow e in FIG. As a result, the flow of air is not obstructed by the flow of air sucked into the intake duct 35 from the opening 37, and the efficiency of sucking air into the air cleaner 20 is further enhanced.

Moreover, since the inclined portion 42a is arranged at a position corresponding to the intake port 35a of the intake duct 35 when viewed from the front in the front-rear direction of the vehicle, the air flow is more positively flowed by the side away from the intake port 35a. As a result, the efficiency of air intake into the air cleaner 20 is further improved.

Further, of the two first ribs 41 and 42, the first rib 41 closest to the rear wheel WR in the vehicle width direction is formed in a straight line along the vehicle front-rear direction, and is closest to the rear wheel WR in the vehicle width direction. Since the inclined portion 42a is provided on the first rib 42 located at a distant position, the reception of air is prioritized over the induction of the flow of air from the rear wheel WR, and the air reception gives priority to the air cleaner 20. The efficiency of inhaling air into the car is increased.

Further, since the third rib 44 protruding outward in the vehicle width direction is provided on the rear side portion of the duct cover 36 in the vehicle front-rear direction in the peripheral edge of the opening 37, the traveling wind flowing from the front to the rear in the vehicle front-rear direction. A part of the air is received by the third rib 44 and guided from the opening 37 of the duct cover 36 to the intake duct 35 side, and the efficiency of sucking air into the air cleaner 20 is further improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes are made without departing from the present invention described in the claims. Is possible.

For example, in the above-described embodiment, the structure in which the two first ribs 42, 42 arranged in the vehicle width direction are erected on the outer surface of the front wall portion 27d of the duct cover 36 has been described, but a single first rib stands. It may be installed, or three or more first ribs may be installed.

Further, the present invention is not limited to a scooter type motorcycle, but can be widely applied to a saddle-riding vehicle in which an air cleaner is arranged on one side of the rear wheels.

20 ... Air cleaner 25 ... Cleaner case 27d ... Front wall 31 ... Unpurified chamber 35 ... Intake duct 35a ... Intake port 36 ... Duct cover 37 ... Opening 41 , 42 ... 1st rib 42a ... Inclined portion 43 ... 2nd rib 44 ... 3rd rib WR ... Rear wheel

Claims (6)

The cleaner case (25) of the air cleaner (20) is arranged on one side of the rear wheel (WR) in the vehicle width direction, and the intake duct (35) having the intake port (35a) at the front end is the cleaner case (25). In a saddle-mounted vehicle provided in the cleaner case (25) so as to suck air into the unpurified chamber (31) in the 25), the intake duct (35) is covered from the other side in the vehicle width direction. The cleaner case (25) is provided with a duct cover (36) that covers at least a part of the intake duct (35) from the front in the vehicle front-rear direction and has an opening (37) formed on one side in the vehicle width direction. The first ribs (41, 42) along the vehicle front-rear direction are erected on the outer surface of the front wall portion (27d) that covers the intake duct (35) from the front of the duct cover (36). An air cleaner structure in a duct-riding vehicle characterized by. The second rib (43) is connected to the outer surface of the front wall portion (27d) of the duct cover (36), is connected to the rear end portion of the first rib (41, 42) along the vehicle front-rear direction, and extends along the vehicle width direction. The air cleaner structure in the saddle-riding vehicle according to claim 1, wherein the) is erected so as to project upward. At least a part of the first rib (42) is provided with an inclined portion (42a) that inclines so as to approach the rear wheel (WR) in the vehicle width direction from the rear in the front-rear direction to the front of the vehicle. The air cleaner structure in the saddle-riding vehicle according to claim 1 or 2. The saddle-riding type according to claim 3, wherein the inclined portion (42a) is arranged at a position corresponding to the intake port (35a) of the intake duct (35) when viewed from the front in the front-rear direction of the vehicle. Air cleaner structure in the vehicle. A plurality of the first ribs (41, 42) are provided in the vehicle width direction, and among the first ribs (41, 42), the first rib (41) closest to the rear wheel (WR) in the vehicle width direction is. The first rib (42) is formed in a straight line along the front-rear direction of the vehicle and is located farthest from the rear wheel (WR) in the vehicle width direction, and the inclined portion (42a) is provided. The air cleaner structure in the saddle-riding vehicle according to claim 3 or 4. Claims 1 to 1, characterized in that a third rib (44) projecting outward in the vehicle width direction is provided on the rear side portion in the vehicle front-rear direction of the peripheral edge of the opening (37) of the duct cover (36). The air cleaner structure in the saddle-riding vehicle according to any one of 5.

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