TWI385304B - Straddle type vehicle - Google Patents

Description

Straddle type vehicle

The present invention relates to a straddle type vehicle having an air cleaner for purifying air supplied to an engine, and more particularly to a technique for preventing water droplets and the like from entering from a suction port of an air cleaner.

Conventionally, there is a motorcycle including an air cleaner that removes dust or the like from the air supplied to the engine, and the air cleaner is disposed below the seat (for example, Patent Document 1). The suction port of the air cleaner needs to be provided so as not to allow water droplets or the like to be immersed therefrom. In the vehicle disclosed in Patent Document 1, the suction port is opened upward, and the back of the seat is located above the suction port.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2004-345634

However, if the back surface of the seat located above the air cleaner approaches the suction port, or if the plate-shaped member is provided close to the suction port to prevent the ingress of water droplets or the like, the flow of the air from the suction port is hindered, and the air intake efficiency is lowered. may.

The present invention has been made in view of the above problems, and an object of the invention is to provide a straddle-type vehicle in which an air cleaner is disposed under a seat, which can prevent water droplets and the like from entering the inside of the air cleaner without causing a decrease in intake efficiency.

In order to solve the above problems, the straddle type vehicle of the present invention has: a seat; a rear fender disposed below the seat and covering the rear wheel from above; an air cleaner having a suction opening opening between the seat and the rear fender, and purging is sucked in by the suction port The external air is supplied to the engine, and the wall is raised from the rear side of the seat or the surface of the rear fender to the air cleaner side. Further, an inclined surface that is inclined obliquely upward is provided at a position intermediate to the back surface of the seat, and the rear side is higher than the front side. Further, the air cleaner is disposed such that the suction port is open below the inclined surface, and the wall is located before and to the side of the suction port, together with the inclined surface and the upper surface of the rear fender Surrounding the aforementioned suction port.

According to the present invention, since the suction port of the air cleaner is surrounded by the wall, it is possible to prevent water droplets or the like from entering from the suction port. Further, since the suction port is opened below the inclined surface formed on the back surface of the seat, the space before the suction port can be enlarged, and the wall surrounding the suction port can be prevented from becoming an obstacle to intake.

Furthermore, the straddle-type vehicle here is a vehicle in which a rider rides on a seat, such as a motorcycle (including a small turbine treadmill), a four-wheeled light vehicle, and a motorized sled.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a side view of a motorcycle 1 according to an embodiment of the present invention, and FIG. 2 is a plan view of a rear portion of the motorcycle 1. 3 is a perspective view of the vehicle body frame 20, the air cleaner 50, and the rear fender 40 provided in the motorcycle 1, and FIG. 4 is a front perspective view of the rear fender 40. 5 is a side view of the seat rail 24, the air cleaner 50, and the rear fender 40.

As shown in FIG. 1 or FIG. 3, the motorcycle 1 includes an engine 2, a front wheel 3, a rear wheel 4, a vehicle body frame 20, a seat 30, a rear fender 40, and an air cleaner 50. Further, the vehicle body frame 20 includes a head pipe 21, a main pipe 22, a lower pipe 23, a pair of left and right seat rails 24 and 24, a vertical pipe 25, and a pair of right and left rear stays 26 and 26.

As shown in Fig. 1, the head pipe 21 is located at the front end of the vehicle body frame 20, and supports a steering shaft (not shown) disposed inside thereof. A handle 6 is disposed on the upper side of the head pipe 21. The steering shaft is coupled to the front fork 5 by the brackets 7, 7, and the handle 6, the front fork 5, and the front wheel 3 supported by the front fork 5 are rotated left and right around the steering shaft.

A front end of the main pipe 22 and an upper end (front end) of the lower pipe 23 are connected to the head pipe 21. The main pipe 22 extends rearward from the head pipe 21 and suspends the engine 2 located below the main pipe 22. The lower tube 23 extends obliquely downward from the head pipe 21 to support the engine 2 disposed behind the lower tube 23.

The engine 2 has a crankcase 2c, a cylinder block 2b located at an upper portion of the crankcase 2c, and a cylinder head 2a located at an upper portion of the cylinder block 2b. Inside the cylinder block 2b, a cylinder 2d is formed, and inside the cylinder head 2a, an intake passage 2e through which air flows toward the cylinder 2d is formed. A throttle body 8 for controlling the amount of air flowing to the cylinder 2d is disposed behind the cylinder head 2a, and the throttle body 8 is connected to the intake passage 2e. Further, an air cleaner 50 is connected to the throttle body 8 via an intake duct 9. The air passage for supplying air to the engine 2 is constituted by the throttle body 8, the intake duct 9, and the air cleaner 50.

A rear wheel 4 is disposed behind the engine 2. The driving force of the engine 2 is transmitted to the rear wheel 4 via a chain or a belt (not shown). Furthermore, the rear wheel 4 is supported by the rear end of the rear arm 12. The longitudinal tube 25 is extended downward from the rear end of the main pipe 22 Stretching, supporting the pivot 13. The front end of the rear arm 12 is supported by the pivot 13.

At the middle position of the vertical pipe 25, the front end of the rear stay 26 is connected, and the rear stay 26 extends obliquely upward from the connection position with the vertical pipe 25, and the rear end thereof is connected to the seat rail 24 (refer to FIG. 3). .

The front ends of the seat rails 24, 24 are connected to the rear end of the main pipe 22 via a bracket 27 (refer to Fig. 3). The seat rails 24, 24 are supported by the rear end of the main pipe 22 and behind the seat 30 to support the seat 30. The seat 30 is located behind the fuel tank 11 disposed above the main pipe 22.

6 is a cross-sectional view of the seat 30 of the VI-VI line shown in FIG. 2, and FIG. 7 is a bottom view of the bottom plate portion 31 provided on the back side of the seat 30.

The seat 30 is a so-called double seat, and the seat 30 can ride two occupants arranged in front and rear. The seat 30 has a rear seat 30a for the driver to ride and a rear seat 30b for the occupant behind the driver, the front seat 30a is located in front of the seat 30, and the rear seat 30b is located behind the seat 30.

As shown in Fig. 6, the bottom plate portion 31 is a plate-shaped member that is long in the front-rear direction, and has an inclined portion 31c that is inclined obliquely upward so that the rear side is higher than the front side. The inclined portion 31c is located behind the front seat 30a and the rear seat 30b (in the direction indicated by Fr) on the back side of the seat 30. In other words, the bottom plate portion 31 has a front bottom plate portion 31a on the back side of the front seat 30a, and a rear bottom plate portion 31b on the back side of the rear seat 30b. The inclined portion 31c is located on the front side bottom plate portion 31a and the rear side bottom plate portion 31b. between. Further, the bottom plate portion 31 is curved as follows, and the end edges 31d and 31d in the width direction of the bottom plate portion 31 are located below the center in the width direction (see FIG. 7).

The seat 30 has a buffer portion 32 above the bottom plate portion 31. As shown in Fig. 6, the buffer portion 32 is provided over the entire area of the upper surface of the bottom plate portion 31, and the connection starts from the front end 32a to the rear end 32b. Further, the thickness of the buffer portion 32 where the inclined portion 31c is formed is thinner than the thickness of the other portion of the buffer portion 32. That is, the thickness of the buffer portion 32 at the position of the inclined portion 31c is thinner than the thickness of the buffer portion 32 of the front seat 30a and the rear seat 30b.

As shown in Fig. 7, in the bottom plate portion 31, a plurality of dampers 31e, 31f, 31h, 31i supporting the seat 30 are provided on the seat rail 24. The dampers 31e, 31e, and 31h are provided so as to be aligned in the front-rear direction along the left side edge 31d of the bottom plate portion 31, and the dampers 31f, 31f, and 31i are disposed to be aligned in the front-rear direction along the right side edge 31d. The dampers 31e and 31e on the front side of the three dampers 31e, 31e, and 31h arranged in the front-rear direction are located before the inclined portion 31c, and the damper 31h located at the rear is located behind the inclined portion 31c. Similarly, the front side dampers 31f, 31f of the three dampers 31f, 31f, 31i arranged in the front-rear direction are located before the inclined portion 31c, and the rearmost damper 31i is located behind the inclined portion 31c.

As shown in Fig. 3, a plate-shaped support rod 24a is provided at the end of the seat rails 24, 24. In a state where the seat 30 is placed on the seat rail 24, the dampers 31h and 31i abut against the support lever 24a (see FIG. 7), and the dampers 31e and 31f abut against the seat rail 24.

On the back side of the seat 30, positioning projections 31g and positioning holes 31j that determine the relative positions of the seat 30 and the body frame 20 are provided. Specifically, the positioning projection 31g is provided at the center of the damper 31i and protrudes from the side of the support lever 24a (refer to FIG. 7). On the other hand, in the support rod 24a, corresponding to the positioning protrusion At a position of 31 g, a hole 24b (see Fig. 3) is formed, and the positioning projection 31g is fitted into the hole 24b. Further, the positioning hole 31j is formed at the front end of the bottom plate portion 31 (see Fig. 6). On the other hand, as shown in Fig. 3, a plate-shaped bracket 28 is fixed to the front end of the seat rails 24, 24. The bracket 28 has an insertion portion 28a which extends rearward and is inserted into the bottom plate portion 31. Positioning hole 31j. Thus, the position of the seat 30 on the seat rail 24 is determined by the positioning projection 31g and the positioning hole 31j provided at the position away from the front and rear.

The rear fender 40 has a shape that is curved like the outer wheel 4 (see Fig. 5). As shown in FIG. 1, the rear fender 40 is located below the seat 30 and covers the rear wheel 4 from above.

As shown in Fig. 5, the rear fender 40 has a rear fender 40a located behind the rear end of the seat rail 24, and a front fender 40b between the left and right rear stays 26, 26 (see Fig. 3). Further, the front fender 40b has a plate-shaped upper surface portion 40c that is bent outwardly along the rear wheel 4, and side surface portions 40d and 40d that are erected upward from the end edge of the upper surface portion 40c in the width direction (refer to the figure). 4). Further, as shown in FIG. 4 or FIG. 5, a support surface 40e is connected to the front end of the upper surface portion 40c. Buffers 49 and 49 are attached to the upper surface of the support surface 40e, and an air cleaner 50 is disposed above the buffers 49 and 49.

The air cleaner 50 is a box-shaped device (see FIG. 5) having a substantially triangular shape on the side, and a filter (not shown) for removing dust from the outside air is disposed inside. The air cleaner 50 is disposed between the rear fender 40 and the seat 30 (refer to FIG. 1). Specifically, the air cleaner 50 is located below the support surface portion 40e of the rear fender 40 and below the front bottom plate portion 31a of the bottom plate portion 31 of the seat 30. In addition, the air filter 50 is located on the left in the plane of view. Between the right pair of seat rails 24, 24 (see Figure 2). Further, a side cover panel 14 is disposed on the side of the seat rail 24 and the rear stay 26, and the air cleaner 50 is covered from the side surface by the side cover panel 14 (see FIG. 1).

As shown in Fig. 5, on the right side of the stay 26, a bracket 26a extending upward is provided. On the side of the air cleaner 50, a mounting portion 52 extending rearward is provided. The mounting portion 52 is fixed to the bracket 26a by bolts, for example. Further, after the left side, the stay 26 is also provided with a bracket (not shown) fixed to the air cleaner 50, and the air cleaner 50 is on the support surface 40e of the rear fender 40, by a pair of The struts 26, 26 are supported.

The air cleaner 50 has a suction port 51 for sucking outside air (refer to FIG. 3 or FIG. 5). 8 is a plan view of the suction port 51, and FIG. 9 is a cross-sectional view of the air cleaner 50, the rear fender 40, and the seat 30 of the IX-IX line shown in FIG.

As shown in FIG. 8 or FIG. 9, the suction port 51 is a rectangle that is long in the width direction of the vehicle, and protrudes from the air cleaner 50 toward the rear of the vehicle body (in the direction indicated by R in FIGS. 8 and 9). form. The air cleaner 50 is disposed such that the suction port 51 opens toward the rear of the vehicle body, and the opening direction of the suction port 51 faces the direction along the bottom plate portion 31. Further, as shown in FIG. 9, the air cleaner 50 is disposed such that the suction port 51 opens below the inclined portion 31c of the bottom plate portion 31. That is, the front end 51b of the suction port 51 is located below the front side of the inclined portion 31c. Further, an opening 50a (see FIG. 3) that opens toward the front of the vehicle body is formed on the front surface 50b of the air cleaner 50. The intake duct 9 described above is connected to the opening 50a, and the air taken in by the suction port 51 is discharged through the opening 50a through a filter disposed inside the air cleaner 50.

On the back surface of the seat 30 and the upper surface of the rear fender 40, a plurality of wall portions 34, 35, 44, 45 which are erected from the rear surface or the upper surface are formed. These wall portions are located in front of the suction port 51 (the opening direction of the suction port 51, in the direction indicated by R in FIG. 8 or FIG. 9) and the side, and the inclined portion 31c, the upper surface of the rear fender 40, and These wall portions 34, 35, 44, 45 surround the suction port 51.

Specifically, as shown in FIG. 8 or FIG. 9 , the front wall portion 34 is formed on the bottom plate portion 31 provided on the back side of the seat 30 . The front wall portion 34 stands up toward the air cleaner 50 side (the rear fender 40 side), and is located in front of the suction port 51 (opening direction of the suction port 51).

Further, side wall portions 35 and 35 are formed in the bottom plate portion 31 (see FIG. 7). The side wall portions 35 and 35 are erected toward the air cleaner 50 side (the side of the rear fender 40), and are located on the left and right sides of the suction port 51. The length of the side wall portions 35, 35 is longer than the front wall portion 34, and the side wall portions 35, 35 extend downward beyond the suction port 51.

The suction port 51 is located above the upper surface portion 40c of the rear fender 40. Further, the upper surface portion 40c is formed with a facing wall portion 44 that rises from the upper surface portion 40c toward the air cleaner 50 side (the seat 30 side). The opposing wall portion 44 is located away from the suction port 51 and faces the suction port 51. The opposing wall portion 44 extends upward until it overlaps with the wall portion 34 disposed before the seat 30, with a gap therebetween.

Further, side wall portions 45 and 45 are formed on the upper surface portion 40c (see FIG. 4). The side wall portions 45 and 45 also rise from the upper surface portion 40c toward the air cleaner 50 side (the seat 30 side) and are located on the side of the suction port 51. The side wall portions 45, 45 extend upward until they overlap the side wall portions 35, 35 of the seat 30, and a gap is also provided therebetween.

Further, as shown in FIG. 4, a gap is provided between the end edges 44a, 44a of the opposing wall portion 44 and the side wall portions 45, 45, and the side wall portions 35, 35 of the seat 30 are located at the end edges 44a, 44a and the side wall portion 45. 45, (refer to Figure 8).

Further, as shown in FIG. 9, a lower side wall portion 46 is formed on the upper surface portion 40c. The lower side wall portion 46 faces the lower surface 51a of the suction port 51, and is erected by the upper surface portion 40c. Further, on the inclined portion 31c of the seat 30, the upper wall portion 36 is erected from the inclined portion 31c toward the upper surface 51c of the suction port 51.

Further, the inclined portion 31c of the seat 30, the front wall portion 34, the side wall portions 35, 35, the upper wall portion 36, the upper surface portion 40c of the rear fender 40, the opposite wall portion 44, the side wall portions 45, 45, and the lower side portion 46 is formed in a box shape as a whole, and the suction port 51 is opened in the space S surrounded by the wall portion. Further, as shown in FIG. 8, through-holes 40f and 40f are formed in the upper surface portion 40c of the rear fender 40, and are used for discharging the lower portion 44, the side wall portions 45, 45, and the lower portion. Water droplets or the like inside the side wall portion 46.

As described above, the motorcycle 1 includes a seat 30, a rear fender 40 disposed below the seat 30, and covering the rear wheel 4 from above, and an air cleaner 50 having a seat 30 and The suction port 51 is opened between the rear fenders 40, and the outside air taken in by the suction port 51 is purified and supplied to the engine 2. Further, the bottom plate portion 31 provided on the back side of the seat is provided with a wall portion 34 and side wall portions 35, 35 before standing on the air cleaner 50 side, and is provided on the upper surface portion 40c of the rear fender 40. The opposing wall portion 44 and the side wall portions 45, 45 are erected on the air cleaner 50 side. Further, in the middle position of the bottom plate portion 31 of the seat 30, the rear side is provided obliquely upward from the front side. The inclined inclined portion 31c is disposed such that the air suction port 51 is opened below the inclined portion 31c. Further, the front wall portion 34, the side wall portions 35, 35, the opposing wall portion 44, and the side wall portions 45, 45 are located in front of and behind the suction port 51, and the inclined portion 31c and the aforementioned upper surface portion 40c of the rear fender 40 The suction port 51 is surrounded together.

According to the motorcycle 1, since the suction port 51 is surrounded by the wall portions 34, 35, 44, and 45, it is possible to prevent water droplets or the like from entering from the suction port 51. Further, since the suction port 51 is opened below the inclined surface 31c formed on the back surface of the seat 30, a large space S before the suction port 51 can be secured, and the wall portions 34, 35, 44 surrounding the suction port 51 can be suppressed. 45 becomes an obstacle to inhalation.

Further, in the motorcycle 1, the body frame 20 is provided with a pair of right and left rear stays 26, 26 extending in the front and rear directions of the vehicle body, and the air cleaner 50 is attached to the rear stays 26, 26. Further, the bottom plate portion 31 provided on the back side of the seat 30 is provided with positioning projections 31g and positioning holes 31j that determine the relative positions of the seat 30 and the vehicle body frame 20. Thereby, since the relative positions of both the air cleaner 50 and the seat 30 and the body frame 20 are determined, the position of the suction port 51 of the air cleaner 50 and the position of the inclined portion 31c provided in the seat 30 can be prevented from being generated. Offset.

Furthermore, the present invention is not limited to the motorcycle 1 described above, and various modifications are possible. For example, in the above description, both the bottom plate portion 31 of the seat 30 and the upper surface portion 40c of the rear fender 40 form the wall portions 34, 35, 44 which rise toward the air cleaner 50 side, And 45. However, the wall portion that rises toward the air cleaner 50 side may be provided only in any one of the bottom plate portion 31 and the upper surface portion 40c.

1‧‧‧ motorcycle

2‧‧‧ Engine

3‧‧‧ Front wheel

4‧‧‧ Rear wheel

5‧‧‧ Front fork

8‧‧‧ throttle body

9‧‧‧ Inhalation channel

20‧‧‧ body frame

21‧‧‧ head tube

22‧‧‧Supervisor

23‧‧‧Under the tube

24‧‧‧Seat rails

25‧‧ ‧longitudinal

26‧‧‧ Rear struts

30‧‧‧ seats

30a‧‧‧Front seat

30b‧‧‧ rear seat

31‧‧‧Bottom plate

31c‧‧‧inclined part (inclined surface)

31g‧‧‧Positioning protrusion (positioning part)

31j‧‧‧Positioning hole (positioning part)

32‧‧‧ buffer

34‧‧‧ front wall

35‧‧‧ Side wall

36‧‧‧Upper wall

40‧‧‧ Rear fender

40c‧‧‧ upper surface

44‧‧‧ Relative wall

45‧‧‧ Sidewall

46‧‧‧ Lower wall

50‧‧‧Air filter

51‧‧‧Inhalation

Fig. 1 is a side view of a motorcycle according to an embodiment of the present invention.

Figure 2 is a plan view of the rear portion of the motorcycle.

3 is a perspective view of a body frame, an air cleaner, and a rear fender provided in the motorcycle.

Figure 4 is a perspective view of the front of the rear fender.

Figure 5 is a side view of the seat rail, air cleaner, and rear fender.

Figure 6 is a cross-sectional view of the above seat of the line VI-VI shown in Figure 2.

Fig. 7 is a bottom plan view of a bottom plate portion provided on the back side of the seat.

Fig. 8 is a plan view showing the suction port of the above air cleaner.

Figure 9 is a cross-sectional view of the air cleaner, rear fender, and seat of the IX-IX line shown in Figure 8.

30‧‧‧ seats

31‧‧‧Bottom plate

31c‧‧‧inclined part (inclined surface)

32‧‧‧ buffer

34‧‧‧ front wall

35‧‧‧ Side wall

36‧‧‧Upper wall

40‧‧‧ Rear fender

40c‧‧‧ upper surface

40e‧‧‧Support for the face

44‧‧‧ Relative wall

45‧‧‧ Sidewall

46‧‧‧ Lower wall

50‧‧‧Air filter

51‧‧‧Inhalation

51a‧‧‧Under the surface of the suction inlet

51b‧‧‧ front end of suction button

51c‧‧‧ surface above the suction inlet

S‧‧‧ Space

Claims (5)

A straddle-type vehicle, comprising: a seat; a rear fender disposed below the seat and covering the rear wheel from above; and an air cleaner having the seat and the rear gear Opening the opening between the mud plates, and purifying the external air taken in by the suction port to be supplied to the engine; and the wall from at least one of the back surface of the seat or the upper surface of the rear fender And erected toward the air cleaner side; and at an intermediate position of the back surface of the seat, the rear side is provided with an inclined surface inclined obliquely upward from the front side; and the air cleaner is configured by the suction port The wall portion is disposed to open below the inclined surface; the wall includes a wall portion facing the suction port at a position apart from the suction port, and a wall portion located at a side of the suction port, and the inclined surface and the rear surface The aforementioned upper surface of the fender collectively surrounds the aforementioned suction port. The straddle-type vehicle according to claim 1, further comprising a pair of right and left body frames extending in a front-rear direction of the vehicle body; the air cleaner is mounted on the pair of left and right body frames; On the back side, a positioning portion that determines the relative position of the seat to the vehicle body frame is provided. The straddle type vehicle of claim 1, wherein the aforementioned seat is included in the seat The middle side is located on the front side for the driver to ride the front seat, and the rear seat arranged on the rear side of the front seat for the occupant behind the driver to ride the rear seat; the inclined surface is on the back side of the seat, behind the front seat And the front seat of the aforementioned rear seat. The straddle-type vehicle of claim 3, wherein the seat system is disposed on a seat rail extending in a front-rear direction of the vehicle body; and the front side of the seat is provided in a plurality of manners arranged in a front-rear direction of the vehicle body a support portion, wherein the plurality of support portions abut on the seat rail and support the seat on the seat rail; at least one of the plurality of support portions is located further rearward than the inclined surface, the plural The remaining of the support portions are located further forward than the aforementioned inclined faces. The straddle-type vehicle according to claim 3, wherein the seat has a buffer portion; and the thickness of the buffer portion at a position where the inclined surface is formed is thinner than a thickness of the other portion of the buffer portion.