CN100486861C - Riding type vehicle - Google Patents

Abstract

A riding type vehicle with improved cooling function of a V-belt continuously variable transmission and a compact body cover. A front side of a seat is partitioned with a space recessed to a lower side. The inside of a vehicle body cover is partitioned with a center tunnel. An engine unit is supported by a vehicle body frame on a lower side of the recessed space. The engine unit includes a transmission case having a belt chamber containing the V-belt continuously variable transmission. A footrest is arranged on an outer side in a vehicle width direction of the transmission case. An intake duct that guides air for cooling the V-belt type continuously variable transmission is disposed on an outer side in a vehicle width direction of the center tunnel and on an upper side of the transmission case.

Description

Straddle-type vehicle

Technical field

The present invention relates to be provided with the Straddle-type vehicle of V-type variable v-belt drive.

Background technology

In background technology, known (for example, the seeing patent documentation as follows 1) such as motor bikes that is provided with the V-type variable v-belt drive.

When motor bike etc. was advanced, the V-type band of V-type variable v-belt drive was because frictional heat etc. and temperature build-up.Therefore, often by supplying air, with forced cooling V-type band from the outside to the band chamber that holds the V-type band.

Patent documentation 1 disclosed motor bike comprises from lateral observation being the body shell of basic V-arrangement.Body shell is covered by body gate, and engine position is in the basic V-arrangement trench part of body shell.Body shell comprise from trench part to front upper place bevelled front side sloping portion and from the trench part to back upper place bevelled rear side sloping portion.

Motor bike comprises induction tract and gas exhaust duct, and air is introduced the band chamber by induction tract, and the air in the band chamber is discharged to the outside by gas exhaust duct.Induction tract is arranged substantially point-blank along the front side sloping portion of body shell, with from the beginning pipe extension forward.Gas exhaust duct is arranged substantially point-blank along the rear side sloping portion of body shell, to extend upward from trailing wheel.So, according to this motor bike, induction tract and gas exhaust duct are along the basic V-shaped configuration setting of body shell.

Patent documentation 1:JP-A-2002-130440

Summary of the invention

The problem to be solved in the present invention

Yet for disclosed motor bike in the patent documentation 1, induction tract and gas exhaust duct are arranged along the body shell in the body gate.Therefore, body gate increases the amount of induction tract and gas exhaust duct dimensionally.On the other hand, when induction tract and gas exhaust duct diminish on diameter so that body gate when diminishing dimensionally, can not guarantee the flow passage cross-sectional area of induction tract inside and gas exhaust duct in-to-in air flue, therefore damage the cooling power of V-type variable v-belt drive.

The present invention has considered this problem, and its purpose is to promote that the miniaturization of the cooling power of V-type variable v-belt drive and body gate is compatible.

The means of dealing with problems

Straddle-type vehicle according to the present invention is the Straddle-type vehicle that comprises framework and vehicle seat and be formed with recessed space, be recessed to the downside of described vehicle seat front side in the above recessed space of its lateral plan, and wherein the rider is sitting on the described vehicle seat and by straddling described framework and comes steering vehicle, described Straddle-type vehicle comprises: the body gate that covers described framework, at interval recessed space on its outside, and central aisle at interval on the side within it; Engine unit, by described frame supported on the downside in the female space, and comprise driving engine, V-type variable v-belt drive and with the change speed gear box that is formed with the band chamber, wherein said V-type variable v-belt drive is contained in described band chamber interior; And air flue, be arranged in the outside on vehicle-width direction of described central aisle and the upside of described change speed gear box, be used for being communicated with described band chamber, wherein, the upper end of described air flue is lower than the lower end in the female space.

According to this Straddle-type vehicle, the air flue that is used for being communicated with the band chamber is arranged in the place, space on the upside of the outside on the vehicle-width direction and described change speed gear box of described central aisle, and therefore, this space is used as the space that air flue is installed effectively.Therefore, even do not increase the size of body gate, also can form air flue with enough flow passage sectional areas.Therefore, can be so that the miniaturization of the lifting of the cooling power of V-type variable v-belt drive and body gate be compatible mutually.In addition, the lower end of air flue becomes and is lower than the lower end that is positioned at the recessed space on the vehicle seat front side.Therefore, in the Straddle-type vehicle of this type, the recessed space and the rider that just are formed with the downside that is recessed on the vehicle seat front side therein take advantage of body gate to come in this kind Straddle-type vehicle of steering vehicle by striding, and can realize or the layout of additional air path.

Other Straddle-type vehicle according to the present invention comprises framework; Engine unit by described frame supported, and comprises driving engine, V-type variable v-belt drive and is formed with the change speed gear box of being with the chamber that wherein said V-type variable v-belt drive is contained in described band chamber interior; Put the pin member, it is arranged on the outside of described change speed gear box when observing in birds-eye view on vehicle-width direction, is used to support rider's pin; And air flue, be arranged in the upside of described change speed gear box, be used for being communicated with, wherein with described band chamber, when observing in birds-eye view, the external side end on the vehicle-width direction of described air flue is arranged in described inboard of putting the medial extremity on vehicle-width direction of pin member.

Also in this Straddle-type vehicle, the air flue that is communicated with the band chamber is arranged in the place, space on the upside of described change speed gear box, and this space is by effectively as the space of installation air flue.Therefore, can be so that the miniaturization of the lifting of the cooling power of V-type variable v-belt drive and body gate be compatible mutually each other.In addition, air flue on vehicle-width direction, be projected into the outside amount not can with put the pin member as many, therefore, can promote the miniaturization of Straddle-type vehicle.

Advantage of the present invention

According to the present invention, in the Straddle-type vehicle that comprises the V-type variable v-belt drive, can be so that the miniaturization of the raising of the cooling power of V-type variable v-belt drive and body gate be compatible each other.

Description of drawings

Fig. 1 is the lateral plan according to the motor bike of first embodiment.

Fig. 2 is the birds-eye view that the position relation of body shell, engine unit and gas exhaust duct etc. is shown.

Fig. 3 is the right side view of engine unit.

Fig. 4 is the left side view of engine unit.

Fig. 5 is the cutaway view that the engine unit installing condition is shown.

Fig. 6 illustrates the in-built cutaway view of engine unit.

Fig. 7 is the in-built cutaway view of an engine unit part.

Fig. 8 is the exploded perspective view of the inboard case of second casing and change speed gear box.

Fig. 9 is the cutaway view of the inside of change speed gear box and induction tract etc.

Figure 10 is the cutaway view according to the inside of the change speed gear box that improves example and induction tract etc.

Figure 11 is the lateral plan according to the motor bike of second embodiment.

Figure 12 is the cutaway view according to the inner structure of the engine unit of second embodiment.

Figure 13 is the cutaway view according to the inside of the change speed gear box of second embodiment and gas exhaust duct etc.

Figure 14 is the cutaway view according to the inside of the change speed gear box of the 3rd embodiment and gas exhaust duct etc.

The specific embodiment

Provide the detailed description of the embodiment of the invention below with reference to accompanying drawing.

＜the first embodiment 〉

As shown in Figure 1, the Straddle-type vehicle according to present embodiment is a motor bike 10.Motor bike 10 comprises body shell 11 and the passenger's seat vehicle seat 16 thereon that constitutes its skeleton.Motor bike 10 is so-called foot-operated motor bikes.That is, motor bike 10 is formed with space 17, and this space 17 is viewed as concave shape from side-looking, and space 17 is recessed to the downside on vehicle seat 16 front sides, and the passenger who is sitting on the vehicle seat 16 drives by driving on body shell 11.In addition, so-called here " foot-operated " only in the type of representing vehicle in shape of vehicle, at aspects and unrestricted such as the maximum speed of vehicle, discharge capacities, and to the size of vehicle also fully without limits.

In addition, Straddle-type vehicle according to the present invention is not restricted to foot-operated motor bike, and can be the automotive bicycle of the fuel tank other types such as so-called motorcycle type that are arranged in the vehicle seat front side.

In the following description, the front, rear, left and right direction is meant the direction of observing from the passenger who is sitting on the vehicle seat 16.Body shell 11 comprise steering head pipe 12, from steering head pipe 12 to a main car frame 13 of back lower place diagonally extending, from the middle part of main car frame 13 to left and right vehicle seat beam 14L, the 14R of back upper place diagonally extending and be connected to the rearward end of main car frame 13 and left and right vehicle seat column jecket 15L, the 15R at the middle part of vehicle seat beam 14L, 14R.

The upside of body shell 11, left side and right side are covered by body gate 21.The recessed space 17 that side-looking is recessed to downside is positioned at the outside (upside in more detail) of body gate 21 and the front side of vehicle seat 16.In addition, the inboard of body gate 21 is by separations such as central aisle 11a, and central aisle 11a constitutes the path of the main car frame 13 that passes body shell 11.

Front-wheel 19 is supported by steering head pipe 12 by front fork 18.Fuel tank 20 and vehicle seat 16 are supported on vehicle seat beam 14L, 14R top.Vehicle seat 16 extends from the rear end of last direction vehicle seat beam 14L, the 14R of fuel tank 20.Fuel tank 20 is arranged in the top of the forebody of vehicle seat beam 14L, 14R, and is covered by body gate 21 and vehicle seat 16.

The middle part of main car frame 13 is provided with the side-prominent a pair of left and right first engine bed 22L, 22R downwards.The rear end of main car frame 13 is provided with each to the left and right second engine bed 23L, 23R and back arm support 24L, 24R.In addition, here, support is arranged on places such as main car frame 13, and particularly, the first engine bed 22L, 22R, the second engine bed 23L, 23R, back arm support 24L, 24R etc. constitute the part of body shell 11.

Back arm support 24L, 24R are outstanding downwards from the rear end of main car frame 13.Back arm support 24L, 24R are provided with pivot 38, and the leading section of postbrachium 25 is supported pivotly by pivot 38.Trailing wheel 26 is supported by the rear end of postbrachium 25.The latter half of of postbrachium 25 passes through buffer cell 27 suspensions by body shell 11.

As shown in Figure 5, the second engine bed 23L, 23R are outstanding downwards from the rear end of main car frame 13.The left and right second engine bed 23L, 23R face with each other, and have on vehicle-width direction therebetween at interval.

As shown in fig. 1, be used to drive the engine unit 28 of trailing wheel 26 by body shell 11 supports.Particularly, as shown in Figure 4, engine unit 28 comprises crankcase 35, cylinder 43 and cylinder head 44.Crankcase 35 comprises the first and second engine installation portions 36,37.The first engine installation portion 36 projects upwards from the upside of the leading section of crankcase 35, and is supported by the first engine bed 22L, 22R.The second engine installation portion 37 tilts to give prominence to the back upper place from the top, rear end of crankcase 35, and supports (seeing Fig. 5 again) by the second engine bed 23L, 23R.Therefore, the crankcase 35 supported states that are in by main car frame 13 suspensions.

As following in detail as described in, engine unit 28 comprises driving engine 29 and variable v-belt drive (hereinafter referred to as CVT) 30 (see figure 6)s.Although driving engine 29 does not limit on type, according to present embodiment, driving engine 29 is made of four-cycle, single-cylinder engine.CVT30 is covered by change speed gear box 53, and change speed gear box 53 covers (see figure 1) by lid 45.

As shown in Figure 3, change speed gear box 53 is provided with connection pipe 86.Connection pipe 86 is connected to the part on main shaft 71 1 sides of CVT30 in the change speed gear box 53, and in other words, the forebody (see figure 6) of change speed gear box 53 will be described its details below.Connection pipe 86 is to the back upper place diagonally extending.

Connection pipe 86 is connected with induction tract 136.As Fig. 3 and shown in Figure 9, induction tract 136 is made of bend pipe, and this bend pipe is being bent downwardly after the diagonally extending of back upper place temporarily, herein, and crooked about 180 degree.Be formed on the inboard on vehicle-width direction of induction tract 136 to the air inlet port 137 of under shed.Air inlet port 137 is relative with the upper surface 53u of change speed gear box 53.In addition, upper surface 53u tilts from horizontal surface.Particularly, the upper surface 53u of change speed gear box 53 is in to front lower place bevelled state when vehicle operating.But upper surface 53u also can form and be in when vehicle operating to front upper place bevelled state, perhaps can form horizontal state.

As shown in Figure 2, air inlet port 137 forms such shape: be shorter in length than length on its fore-and-aft direction on its left and right directions.Therefore, can realize the motor bike 10 of slender form.According to present embodiment, air inlet port 137 forms the essentially rectangular shape on plan view.But the shape of air inlet port 137 is unrestricted fully, and can be other shape of ellipse, circle etc.As shown in Figure 3, on fore-and-aft direction, air inlet port 137 is arranged between the axle center C2 of the axle center C1 of main axle 46c (see figure 6) of CVT30 and accessory whorl axle 62 (see figure 6)s.

As shown in Figure 2, the length of induction tract 136 on the fore-and-aft direction that is shorter in length than change speed gear box 53 on the fore-and-aft direction.In planar view, the right-hand member of the right-hand member of change speed gear box 53 and induction tract 136 is arranged in each other roughly positions aligning.Therefore, induction tract 136 can be not outstanding from change speed gear box 53 on side direction, realized the slender shape of motor bike 10 thus.

Although it is unrestricted fully to connect the pattern of induction tract 136 and connection pipe 86, according to present embodiment, induction tract 136 and connection pipe 86 are by being with 135 (see figure 3)s to fix.But connection pipe 86 and air inlet pipe 136 also can be threaded mutually.In addition, connection pipe 86 and air inlet pipe 136 also can be adhered to one another.In addition, connection pipe 86 air inlet pipes 136 also can form as one.

As shown in Figure 9, first filter 138 is installed to the inboard of the air inlet port 137 of induction tract 136.Second filter 139 is installed to the inside of connection pipe 86.Although first filter 138 and second filter 139 can be same types, according to present embodiment, second filter 139 has the mesh thinner than first filter 138.In addition, filter can be installed in any position in the air inlet path, and the installation site is not subjected to concrete restriction.In addition, the number of packages of filter is unrestricted fully, for example, can omit any one in first filter 138 and second filter 139.

Lid 45 cover change speed gear boxs 53 and induction tract 136 both, and the air that covers 45 inner space 45c is that air inlet port 137 from induction tract 136 sucks.Lid 45 upper end 45a K/UP with the overlapping of body gate 21.In addition, lid 45 and body gate 21 can directly overlap each other, or overlap each other by containment member etc.The bottom 45b of lid 45 is overlapping by containment member 140 and change speed gear box 53.

The inner space 45c and the central aisle 11a of lid 45 communicate with each other, and especially, according to present embodiment, the inner space 45c of lid 45 and central aisle 11a are continuous each other on the downside of the upper end 45a of lid 45.Induction tract 136 is arranged in and covers 45 45c inboard, inner space, and is arranged in the outside on vehicle-width direction of central tube 11a.In addition, lid 45 inner space 45c and the border between the central aisle 11a can or be covered 45 etc. shape according to body gate 21 and suitably be provided with.For example, the border can be by constituting through the right part of body gate 21 or the imaginary vertical plane that covers 45 left part.

According to present embodiment, lid 45, induction tract 136 and connection pipe 86 are all made by resin material.But material is unrestricted fully, and in addition, these members can be made by material separately.

As shown in Figure 1, motor bike 10 comprises upside and the front apron 31 of rear side and the back shield 32 that covers the oblique back upper place of trailing wheel 26 that covers front-wheel 19.

Except that above-mentioned body gate 21, motor bike 10 also comprises front shroud 33 and left and right leg protective cover 34L, 34R.Leg protective cover 34L, 34R are the members of front portion that covers rider's leg, and are that the above-below direction updip is tiltedly extended from side elevation.In addition, leg protective cover 34L, 34R can be with front shroud 33 one or are made dividually.

As shown in Figure 2, the horizontal cross sectional geometry of leg protective cover 34L, 34R forms open backward concave shape.In other words, the cross sectional shape of leg protective cover 34L, 34R forms the curved shape to the roughly C of front side polymerization shape.

Yet leg protective cover 34L, 34R be the liquid container body structure not.Although leg protective cover 34L, 34R according to present embodiment form the form that presents bent plate, they also can form and present for example dull and stereotyped form.And, although when according to leg protective cover 34L, the 34R of present embodiment from its front side when its rear side extends, their width on left and right directions increase, they can be unmodified on the width of the left and right sides.And leg protective cover 34L, 34R must tiltedly extend in the above-below direction updip, but can extend upward at upper and lower.Leg protective cover 34L, 34R can extend point-blank during side-looking, perhaps can extend with curve shape.And leg protective cover 34L, 34R can part straight-line extension and part curve extensions.

According to present embodiment, leg protective cover 34L, 34R are by the resin material manufacturing.Yet leg protective cover 34L, 34R are not restricted to this on material.

Although leg protective cover 34L, 34R are not specifically limiting on the length longitudinally,, the lower end of leg protective cover 34L, 34R preferably is positioned at the downside of the upper end of change speed gear box 53.In addition, according to present embodiment, the lower end of leg protective cover 34L, 34R preferably is positioned midway location (the line L1 (see figure 1) that connects the center C 2 of the center C 1 of main axle 46c and accessory whorl axle 62 on the above-below direction of change speed gear box 53, describe after a while) under, the lower end is positioned under the lower end of change speed gear box 53.

(in addition, omitted among Fig. 2 and covered 45 diagram) as shown in Figure 2, induction tract 136 is arranged on the right side of body shell 11, and is arranged on the rear side of the leg protective cover 34R that is positioned on the right side.Leg protective cover 34R extends in the outside on vehicle-width direction (right side) of induction tract 136.

The left and right side of engine unit 28 is furnished with stretcher 85L, the 85R that comprises rubber.Stretcher 85L, 85R are the leg rest members, are used to support rider's pin.Left and right stretcher 85L, 85R are by metal pipe link 87 and be fixed to crankcase 35 supports of the adapter plate 88 (seeing Fig. 3 and 4) of pipe link 87 by engine unit 28.

Pipe link 87 is through the latter half of below of crankcase 35, to extend on vehicle-width direction.The left end of pipe link 87 is outstanding in the left side of crankcase 35, to support the stretcher 85L on the left side.The right-hand member of pipe link 87 is outstanding on the right side of change speed gear box 53, to support the stretcher 85R on the right side.As shown in Figure 3, adapter plate 88 forms by laminated metal sheet, and is formed with the recess 89 that is used to assemble pipe link 87 at the middle part on fore-and-aft direction of adapter plate 88.Recess 89 bar 87 that is connected from the below, and be welded to the outer surface of pipe link 87.

Adapter plate 88 comprises flange shape first installation portion 90 that extends to pipe link 87 the place aheads and flange shape second installation portion 91 that extends to pipe link 87 rears.First installation portion 90 and second installation portion 91 are gone up extension in axial (the left and right direction) of pipe link 87, and relative with the latter half of lower surface 83 of crankcase 35.

The latter half of lower surface 83 of crankcase 35 comprises four boss 92 (only illustrating two in Fig. 3).Boss 92 is outstanding downwards from the lower surface 83 of crankcase 35, and integrally formed with crankcase 35.Each boss 92 is formed with the bolt hole (not shown).Corresponding with the position in the boss 92, also be formed with the bolt hole (not shown) on the adapter plate 88 of stretcher 85L, 85R.In addition, adapter plate 88 and boss 92 are tightened together by bolt 99.So, stretcher 85L, 85R are fixed to crankcase 35 by bolt 99 by pipe link 87 and adapter plate 88.

As shown in figs. 1 and 2, brake pedal 84 is arranged at the place ahead of the stretcher 85 on the right side.Brake pedal 84 is being given prominence on the bevelled direction of right front through the below of change speed gear box 53, and also tilts to extend upward forward on the right side of change speed gear box 53.As shown in Figure 2, when motor bike 10 was advanced, in birds-eye view, rider's right crus of diaphragm 62a is close change speed gear box 53 and induction tract 136 on vehicle-width direction.In addition, although omitted its description among Fig. 2, cover also close right crus of diaphragm 62a on vehicle-width direction of 45 (see figure 1)s.

In addition, although according to present embodiment, the pin member of putting that is used to support rider's pin is made of stretcher 85L, 85R, puts the pin member and is not limited to stretcher 85L, 85R, and can be to be made of other member put the pin member such as tabular grade.

Next, the in-built explanation of engine unit 28 will be provided.As shown in Figure 6, engine unit 28 comprises driving engine 29, above-mentioned CVT30, centrifugal clutch 41 and speed reduction gearing 42.

Driving engine 29 comprises crankcase 35, be connected to the cylinder 43 of crankcase 35 and be connected to the cylinder head 44 of cylinder 43.Crankcase 35 comprises two casings that separate, and, is positioned at the first casing 35a and the second casing 35b that is positioned at the right side in left side that is.The first casing 35a and the second casing 35b abut against each other on vehicle-width direction.

Bent axle 46 is contained in the crankcase 35.Bent axle 46 extends on vehicle-width direction, and horizontal arrangement.Bent axle 46 is supported by bearing 47 by the first casing 35a and is supported by bearing 48 by the second casing 35b.

Piston 50 is inserted in the cylinder 43 slidably.One end of connecting rod 51 is connected to piston 50.Crankpin 59 is arranged between the left hand crankshaft arm 46a and right hand crankshaft arm 46b of bent axle 46.The other end of connecting rod 51 is connected on the Crankpin 59.

Cylinder head 44 is formed with recess 44a and admission port that is communicated with recess 44a and exhausr port (not shown).Light-up plug 55 is inserted into the inside of the recess 44a of cylinder head 44.As shown in Figure 3, air inlet pipe 52a is connected to admission port, and freeing pipe 52 is connected to exhausr port.As shown in figs. 1 and 2, freeing pipe 52 backward and to the lower right diagonally extending, afterwards, through change speed gear box 53 belows of engine unit 28, further extending back, and is connected to noise silencer 54 on the right side that is arranged in trailing wheel 26 from cylinder head 44.

As shown in Figure 6, the left part of cylinder 43 inboards is formed with cam chain chamber 56, is used for the connection between the inside of the inside of crankcase 35 and cylinder head 44.Chain (timing chain) 57 is arranged in the cam chain chamber 56.Chain 57 is made into to be wrapped on bent axle 46 and the camshaft 58.Camshaft 58 rotates with bent axle 46, to open and close air inlet valve and blow off valve (not shown).

The generator case 66 that is used to hold electrical generator 63 is releasably attached to the left side of the forebody of the first casing 35a.The change speed gear box 53 that holds CVT30 is installed to the right side of the second casing 35b.

Opening is formed on the latter half of right side of the second casing 35b, and this opening is by clutch cover back plate 60 sealings.Clutch cover back plate 60 is detachably fixed to the second casing 35b (see figure 7) by bolt 61.

Change speed gear box 53 is independent of crankcase 35 and forms, and is made of inboard case 53a and outside case 53b, and inboard case 53a covers the inboard on vehicle-width direction (left side) of CVT30, and outside case 53b covers the outside on vehicle-width direction (right side) of CVT30.Inboard case 53a is installed to the right side of crankcase 35, and outside case 53b is installed to the right side of inboard case 53a.The band chamber 67 that holds CVT30 is formed at the inside of inboard case 53a and outside case 53b.In addition, above-mentioned connection pipe 86 is arranged on outside case 53b.

As shown in Figure 6, the right-hand end of bent axle 46 extends to band chamber 67 by penetrating the second casing 35b and inboard case 53a.The main wheel 71 of CVT30 is assembled to the right-hand end of bent axle 46.Therefore, main wheel 71 rotates with the rotation of bent axle 46.The right part of bent axle 46 part of the right side of bearing 48 (strictly speaking) is formed with main axle 46c.

On the other hand, the left end of bent axle 46 extends to generator case 66 inside by penetrating the first casing 35a.Electrical generator 63 is installed to the left end of bent axle 46.Electrical generator 63 comprises stator 64 and the rotor 65 relative with stator 64.Rotor 65 is fixed to sleeve 74, and sleeve 74 is with bent axle 46 rotations.Stator 64 is fixed to generator case 66.

The latter half of accessory whorl axle 62 that is furnished with of crankcase 35 in-to-ins, accessory whorl axle 62 is parallel with bent axle 46.As shown in Figure 7, the right part of the core of accessory whorl axle 62 is supported by bearing 75 by clutch cover back plate 60.The left part of accessory whorl axle 62 is supported by bearing 76 by the left end of the second casing 35b.The right-hand end of accessory whorl axle 62 extends to band chamber 67 by penetrating the second casing 35b and clutch cover back plate 60.The right-hand end of accessory whorl axle 62 is connected with the accessory whorl of CVT30 72.

As shown in Figure 6, CVT30 comprise main wheel 71, accessory whorl 72 and be wrapped in main wheel 71 and accessory whorl 72 on V-type band 73.As mentioned above, main wheel 71 is installed on the right side of bent axle 46.Accessory whorl 72 is connected to the right side of accessory whorl axle 62.

Main wheel 71 is included in tight pulley half 71a of that is positioned at the outside on the vehicle-width direction and is positioned at the inboard and half 71b of is taken turns in the activity relative with tight pulley half 71a of on vehicle-width direction.Tight pulley half 71a of is fixed to the right part of main axle 46c, and rotates with main axle 46c.Movable wheel half 71b of is arranged in the left side of tight pulley half 71a of, and is installed to slidably on the main axle 46c.Therefore, movable wheel half 71b of and main axle 46c rotate together, and can axially slide along main axle 46c.Band-slot is formed between tight pulley half 71a of and movable wheel half 71b of.Cam face 111 is formed on the left part of movable wheel half 71b of, and lobe plate 112 is arranged in cam face 111 left sides.Roller counterweight 113 is arranged between the cam face 111 and lobe plate 112 of movable wheel half 71b of.

A plurality of air inlet ports 98 are formed on the part place of the outside case 53b that is positioned on main wheel 71 outsides.As shown in Figure 9, air inlet port 98 is the openings that are used to be communicated with connection pipe 86 inside and band chamber 67.According to present embodiment, air inlet port 98 is open into the right side part of tight pulley half 71a of.

The a plurality of blades 95 that are used to blow are formed at the right side part of tight pulley half 71a of of main wheel 71.Blade 95 guides to band chamber 67 with air from induction tract 136, and will be sent to the outside with the air in the chamber 67.According to present embodiment, blade 95 forms the outside (from side elevation) that the footpath from the core spiral extension of tight pulley half 71a of to tight pulley half 71a of makes progress.Yet blade 95 does not limit its concrete shape, and the quantity of blade is also unrestricted.In addition, the shell of tight pulley half 71a of can be provided with impeller that separates with tight pulley half 71a of etc.Such member is corresponding to " being formed at the air-supply blade in tight pulley half 71a of the outside ".

Accessory whorl 72 is included in and is positioned at inboard tight pulley half 72a of on the vehicle-width direction and is positioned at the outside and half 72b of is taken turns in the activity relative with tight pulley half 72a of on vehicle-width direction.Movable wheel half 72b of is installed to the right part of accessory whorl axle 62.Movable wheel half 72b of and accessory whorl axle 62 rotate together, and can axially slide along accessory whorl axle 62.The right-hand member of accessory whorl axle 62 is provided with compression spring 114, and compression spring 114 is taken turns the propulsive effort that applies on half 72b of left in activity.The axle core of tight pulley half 72a of forms the drum sliding collar, and with spline fitted to accessory whorl axle 62.

According to present embodiment, the diameter of accessory whorl 72 is greater than the diameter of main wheel 71.Particularly, the diameter of tight pulley half 72a of of accessory whorl 72 and movable wheel half 72b of is greater than tight pulley half 71a of of main wheel 71 and the diameter of movable wheel half 71b of.

In CVT30, reduction ratio is taken turns the relation that power that half 71b of promotes and compression spring 114 take turns the activity of accessory whorl 72 between the power that half 72b of promotes left by roller counterweight 113 to the right with the activity of main wheel 71 and is decided.

In other words, when the rotating speed of main axle 46c increased, roller counterweight 113 was by centrifugal action outwards motion radially, and half 71b of is taken turns in activity promoted to the right.Then, movable wheel half 71b of moves to the right, therefore makes the diameter that is wrapped in the band on the main wheel 71 increase.Thus, the diameter that is wrapped in the band on the accessory whorl 72 reduces, and the activity of accessory whorl 72 is taken turns the propulsive effort that half 72b of overcomes compression spring 114 and moved to the right.Therefore, the diameter that is wrapped in the V-type band 73 on the main wheel 71 becomes big, and the diameter that is wrapped in the V-type band 73 on the accessory whorl 72 diminishes, so reduction ratio reduces.

On the other hand, when the rotating speed of main axle 46c reduced, the centnifugal force that acts on the roller counterweight 113 diminished, so roller counterweight 113 is radially inwardly moved along movable cam face 111 and lobe plate 112 of taking turns half 71b of.Therefore, the roller counterweight 113 promotion activity to the right power of taking turns half 71b of diminishes.Then, the propulsive effort of compression spring 114 relatively surpasses this power, and the activity of accessory whorl 72 is taken turns half 72b of and moved to the left, and thus, also motion to the left of half 71b of is taken turns in the activity of main wheel 71.Therefore, the diameter that is wrapped in the band on the main wheel 71 diminishes, and the diameter that is wrapped in the band on the accessory whorl 72 becomes big, so reduction ratio increases.

Seal groove 68a is formed at the left side of the periphery of inboard case 53a, and the neighboring on the right side of the second casing 35b is assembled among the seal groove 68a.In addition, O shape ring 68 inserts the inside that is positioned at seal groove 68a between the inboard case 53a and the second casing 35b.And seal groove 69a is formed at the peripheral right side of inboard case 53a, and the perimeter mounted of outside case 53b is to seal groove 69a.O shape ring 69 inserts between inboard case 53a and the outside case 53b and is arranged in seal groove 69a.The outside case 53b and the second casing 35b are fastening by bolt 70 be inboard case 53a insertion state therebetween.

As shown in Figure 8, the forebody 121 of inboard case 53a forms protrude to the left cup-shaped.Latter half of 122 of inboard case 53a forms protrude to the right cup-shaped.Forebody 121 forms porose 121a, is used to insert the main axle 46c of CVT30.Latter half of 122 form porose 122a, are used to insert the accessory whorl axle 62 of CVT30.In addition, in Fig. 8, clutch cover back plate 60 (see figure 6)s that are inserted between the inboard case 53a and the second casing 35b are not shown.

Inboard case 53a is provided with pipeline 123.According to present embodiment, pipeline 123 forms round-shaped, and three pipelines 123 are formed at the upside of the midway location of inboard case 53a on above-below direction.Yet the shape of pipeline 123 does not limit its structure.And the position of pipeline 123 must not be limited to the upside of inboard case 53a.According to present embodiment, pipeline 123 is arranged at respectively on the forebody 121 and latter half of 122 of inboard case 53a.Yet pipeline 123 can only be arranged in forebody 121 and latter half of 122 one.And the quantity of pipeline 123 is not specially limited.

A plurality of pipelines 124 are formed at the below on the right side of the second casing 35b.More specifically, the second casing 35b comprises the peripheral part 125 that uprightly guides to the right side, and the shape of peripheral part 125 is provided with according to the contour shape of change speed gear box 53.In addition, the downside of peripheral part 125 is by making the recessed seam shape that constitutes of its part, to constitute so-called pectination shape.Therefore, be communicated to the outside of engine unit 28 by pipeline 124 by the second casing 35b and inboard case 53a space 126 at interval.In addition, because the latter half of right side of the second casing 35b is covered by clutch cover back plate 60, so in the second casing 35b latter half of, space 126 is formed between clutch cover back plate 60 and the inboard case 53a.

The comb section of peripheral part 125 is provided with strengthening rib 128.The downside of pipeline 124 is provided with food tray 127.

By above-mentioned structure, as shown in Figure 9, the air in the band chamber 67 guides to space 126 by the pipeline 123 of inboard case 53a, and is disposed to food tray 127 by the pipeline 124 of the second casing 35b.Therefore, above-mentioned air is discharged into engine unit 28 outsides.

According to present embodiment, the downside of the peripheral part 125 of the second casing 35b forms the pectination shape, and forms a plurality of seam shape pipelines 124.Yet the shape of pipeline 124 naturally is not restricted to the seam shape, and can be to wait other shaped aperture such as circle.The pipeline 124 of the second casing 35b does not limit its shape, size, quantity etc.

As shown in Figure 7, centrifugal clutch 41 is installed to the left part of accessory whorl axle 62.Centrifugal clutch 41 is multi-disc wet clutches, and comprises columnar substantially clutch-bell cover 78 and power-transfer clutch boss 77.Clutch-bell cover 78 is assembled on the accessory whorl axle 62 by spline, and with 62 rotations of accessory whorl axle.Clutch-bell cover 78 is equipped with a plurality of ring clutch plates 79.Clutch plate 79 accessory whorl axle 62 axially on each interval one segment distance and aiming at.

Pass through rotatably component location guide column gear 80 of bearing 81 around the left part of accessory whorl axle 62.It is inboard and be arranged in the outside that the footpath of gear 80 makes progress that power-transfer clutch boss 77 is arranged in that the footpath of clutch plate 79 makes progress, and with gear 80 engagements.Therefore, gear 80 is with 77 rotations of power-transfer clutch boss.The outside that the footpath that a plurality of annular friction plates 82 are installed on power-transfer clutch boss 77 makes progress.Friction plate 82 is aimed at along the axial each interval of accessory whorl axle 62, and each friction plate 82 is arranged between the clutch plate adjacent one another are 79,79.

The left side of clutch-bell cover 78 is formed with a plurality of cam face 83a.Roller counterweight 84a is arranged between the clutch plate 79 relative with cam face 83a on the cam face 83a and the rightmost side.

According to centrifugal clutch 41, automatically between clutch engagement state (coupled condition) and disengaging of clutch state (separated position), switch by acting on the big or little of centnifugal force on the roller counterweight 84a.

That is, when the rotating speed of clutch-bell cover 78 was equal to or higher than desired speed, roller counterweight 84a was applied in centnifugal force, and with outwards motion radially, clutch plate 79 is promoted left by roller counterweight 84a.Therefore, clutch plate 79 carries out pressure each other with friction plate 82 and contacts, and to enter the clutch engagement state, in the power-transfer clutch bonding state, the propulsive effort of accessory whorl axle 62 is delivered to output shaft 85 by centrifugal clutch 41.

On the other hand, when the rotating speed of clutch-bell cover 78 became less than desired speed, the centnifugal force that acts on the roller counterweight 84a diminished, so roller counterweight 84a inwardly motion radially.Therefore, the pressure contact between clutch plate 79 and the friction plate 82 is removed, and to enter the disengaging of clutch state, in the disengaging of clutch state, the propulsive effort of accessory whorl axle 62 is not delivered to output shaft 85.In addition, in Fig. 7, the front side of centrifugal clutch 41 (top among Fig. 7) expression disengaging of clutch state, and its rear side (below among Fig. 7) expression clutch engagement state.

Speed reduction gearing 42 is inserted between centrifugal clutch 41 and the output shaft 85.Speed reduction gearing 42 comprises the variable shaft 100 that is arranged in parallel with accessory whorl axle 62 and output shaft 85.Variable shaft 100 rotatably is supported on the first casing 35a by bearing 101, and rotatably is supported on the second casing 35b by bearing 102.The right-hand member of variable shaft 100 is provided with first stud gear 103, and itself and gear 80 mesh.

Variable shaft 100 middle parts are provided with second stud gear 104, and its diameter is less than the diameter of first stud gear 103.Be formed with the 3rd variable gear 105 on the outer circumferential side of the right-hand member of output shaft 85, itself and second stud gear 104 mesh.Interior all sides of the right part of output shaft 85 are supported in the left end of accessory whorl axle 62 by bearing 106.Therefore, output shaft 85 rotatably is supported on the accessory whorl axle 62 by bearing 106, with accessory whorl axle 62 coaxial arrangement (on straight line).And the middle part of output shaft 85 rotatably is supported in the left end of the second casing 35b by bearing 107.

By such structure, power-transfer clutch boss 77 is connected by gear 80, first stud gear 103, variable shaft 100, second stud gear 104 and the 3rd variable gear 105 with output shaft 85.Therefore, output shaft 85 rotates with the rotation of power-transfer clutch boss 77.

The left end of output shaft 85 passes the first casing 35a, and is projected into crankcase 35 outsides.Output shaft 85 left ends are fixed with drive sprocket 108.Chain 109 is wrapped on the drive sprocket 108 as Poewr transmission mechanism, is used for the propulsive effort of output shaft 85 is delivered to trailing wheel 26.In addition, Poewr transmission mechanism is not limited to chain 109, also can be other member of belt conveyor, gear mechanism (by combinations such as a plurality of gears, axle drive shafts) and so on.

The structure of motor bike 10 is as above described.Next, will be with reference to the cooling down operation of figure 9 explanation CVT30.

When engine unit 28 operations, the main axle 46c rotation of CVT30, according to this, blade 95 rotations of tight pulley half 71a of of main wheel 71.Then, produce suction, be used for from aspirating air pipe 136 guiding air to inside with chamber 67.

Then, as shown in Figure 9, air is drawn into aspirating air pipe 136 by suction port 137, and air is cleaned through first filter 138, and then, air flows in the connection pipe 86.Flow into air in the connection pipe 86 by being filtered through second filter 139, afterwards, air is inhaled into band chamber 67 by suction port 98.The air that is drawn into band chamber 67 flows around main wheel 71, accessory whorl 72 and V-type band 73, with cooling main wheel 71, accessory whorl 72 and V-type band 73.

The air that has cooled off main wheel 71, accessory whorl 72 and V-type band 73 discharges from band chamber 67 by the pipeline 123 on the inboard case 53a, and flows to the space 126 between the inboard case 53a and the second casing 35b.In addition, the air in the space 126 is discharged into engine unit 28 outsides by the pipeline on the bottom that is formed at the second casing 35b 124.CVT30 is continued cooling by said flow.

As mentioned above, according to present embodiment, induction tract 136 is arranged in the outside on vehicle-width direction of central aisle 11a, and at the upside of change speed gear box 53, and the upper end 136a of induction tract 136 is arranged on the position (see figure 1) lower than the lower end 17a in the recessed space 17 on vehicle seat 16 front sides.Therefore, the outside on vehicle-width direction of central aisle 11a and can be by effectively as the space that air flue is set in the space of change speed gear box 53 upsides.Therefore, can fully guarantee to be used to be provided with enough spaces of air flue, and not make the size of body gate 21 become big.Therefore, can realize having the long-pending air flue of enough flow channel cross, and the lifting of CVT30 cooling power and the miniaturization of body gate 21 can be coordinated each other mutually.According to present embodiment, the reliability of CVT30 improves can be coordinated with each other with the miniaturization that makes motor bike 10.

Particularly, type according to the riding vehicle in the present embodiment, just, the recessed space that wherein is recessed to downside is formed on the front side of vehicle seat and rider by straddling the riding vehicle type of steering vehicle on body shell, needs the miniaturization of vehicle body especially.Therefore, from making the slender viewpoint of vehicle body,, in the riding vehicle of other type, also do not find big quantitative limitation about the installation site of the air flue that is communicated with the band chamber.But according to present embodiment, as mentioned above, the miniaturization of the lifting of the reliability of CVT30 and motor bike 10 can be coordinated with each other.Therefore, can realize effect of the present invention particularly.But riding vehicle according to the present invention is not limited to the riding vehicle of the above-mentioned type.

According to present embodiment, stretcher 85R is arranged at the outside of change speed gear box 53 on vehicle-width direction, induction tract 136 is arranged in the upside of change speed gear box 53, and induction tract 136 is arranged in the last (see figure 2) in inboard (left side) of the medial extremity on vehicle-width direction (left-hand end) of stretcher 85R at the external side end on the vehicle-width direction (right-hand end).Therefore, induction tract 136 on side direction, can not give prominence to stretcher 85R as many, therefore can promote the miniaturization of motor bike 10.

In addition, according to present embodiment, therefore the outside of induction tract 136, can be suppressed water, dust etc. and flow into band chamber 67, and can improve the reliability of CVT30 by lid 45 coverings of opening to the inside on vehicle-width direction.

As shown in Figure 9, lid 45 and body gate 21 are overlapped each other.Therefore, can suppress water, dust etc. from cover 45 and body gate 21 between the gap invade and to cover 45 inside.Therefore, can further suppress water, dust etc. and flow into band chamber 67, and can further improve the reliability of CVT30.

In addition, the overlapping shape of lid 45 and body gate 21 is unrestricted fully.For example, as shown in figure 10, body gate 21 can be provided with the protrusion 21a that is projected into the outside, and covers 45 left part and protrusion 21a and can overlap each other on above-below direction.

In addition, according to present embodiment, the inner space 45c and the central aisle 11a of lid 45 communicate with each other.Therefore, central aisle 11a in-to-in air mainly sucks from free air diffuser 136.Therefore, compare, can suppress water, dust etc. and flow into band chamber 67, and can further improve the reliability of CVT30 with the situation that directly air in central aisle 11a outside (outside of body gate 21) is drawn into central aisle 11a.

As shown in Figure 2, according to present embodiment, leg protective cover 34R is arranged in change speed gear box 53 front sides, and leg protective cover 34R extends to the outside on vehicle-width direction of induction tract 136.Therefore, the water, dust etc. that splash change speed gear box 53 from the front side can further be suppressed to flow into band chamber 67.In addition, 34R compares with leg protective cover, and induction tract 136 is not outstanding on vehicle-width direction, therefore, needn't consider to be provided with the infringement that 136 pairs of vehicle miniaturizations of induction tract cause.

In addition, according to present embodiment, the length on the fore-and-aft direction that is shorter in length than change speed gear box 53 on the fore-and-aft direction of induction tract 136.Therefore, can realize constructing compact air flue.

As mentioned above, according to present embodiment, in birds-eye view, free air diffuser 136 is arranged in inboard (left side) (see figure 2) of the external side end on vehicle-width direction (right-hand end) of change speed gear box 53 at the external side end on the vehicle-width direction (right-hand end).Therefore, induction tract 136 can be not outstanding from change speed gear box 53 on side direction, can promote the miniaturization of motor bike 10 thus.

As shown in Figure 1, according to present embodiment, induction tract 136 is arranged in the upside between main axle 46c and the accessory whorl axle 62.Therefore, can effectively utilize the space (also not being used effectively in the background technology) of the upside between two wheel shaft 46c, 62 of CVT30.

As shown in Figure 3, change speed gear box 53 comprises upper surface portion 53u, and upper surface portion 53u is in to front lower place bevelled state when operation.Therefore, water, dust etc. are difficult to be stored in upper surface portion 53u place.In addition, according to present embodiment, the air inlet port 137 of induction tract 136 is relative with upper surface portion 53u.Therefore, can further suppress water, dust etc. is sucked from air inlet port 137.

According to present embodiment, induction tract 136 be arranged on the left and right directions of motor bike 10 on the relative side of the side that chain 109 is set.In other words, chain 109 is arranged on the left side of motor bike 10, and induction tract 136 is arranged in the right-hand part of motor bike 10.Therefore, can easily avoid interference between induction tract 136 and the chain 109.Therefore, can easily guarantee to be used to be installed into the enough big space of feed channel 136.In addition, the position of induction tract 136 is not limited thereto on left and right directions, and induction tract 136 can be arranged on the left side of motor bike 10, and the Poewr transmission mechanism of chain 109 etc. can be arranged on the right-hand part of motor bike 10.

＜the second embodiment 〉

According to first embodiment, at interval the induction tract 136 of intake channel is arranged in the outside on vehicle-width direction of central aisle 11a, and at the upside of change speed gear box 53.But the air flue that is arranged on the central aisle 11a outside and change speed gear box 53 upsides is not limited to intake channel.According to second embodiment shown in Figure 11 to 13, after the cooling of CVT30, air is discharged to the outside on vehicle-width direction that exterior exhaust channel is arranged in central aisle 11a, and is arranged in the upside of change speed gear box 53.

Shown in Figure 11 and 12, according to present embodiment, connection pipe 96 is formed on the front side portion (parts on main wheel 71 1 sides) of the outside case 53b of change speed gear box 53, and connection pipe 96 is connected with induction tract 134.The upstream side of induction tract 134 is connected to energy chamber 130.Energy chamber 130 is arranged in the rear side of the leg protective cover 34R that is positioned on the right side.Energy chamber 130 forms prolong in one direction box-like, and extends upward at the bevelled upper and lower along the longitudinal direction of leg protective cover 34R.

As shown in figure 11, the top of energy chamber 130 is provided with the induction tract 131 that is used to absorb air.Induction tract 131 is formed by bend pipe, and this bend pipe is extending to front upper place bevelled direction from the front of energy chamber 130.The air inlet port 132 of induction tract 131 is being opened on the bevelled direction of front lower place, and relative with the back side of leg protective cover 34R.But the opening direction of air inlet port 132 is not limited thereto.The inside of energy chamber 130 includes the filter (not shown).

Energy chamber 130, induction tract 131, induction tract 134 are all made by resin material.But the material of energy chamber 130, induction tract 131 and induction tract 134 is unrestricted fully, and in addition, they can be formed by material separately.

The method that energy chamber 130 is installed is also unrestricted fully.For example, as shown in figure 11, support 39 can be arranged on leg protective cover 34R place, and energy chamber 130 can be fixed to support 39 by bolt etc.

As shown in figure 13, according to present embodiment, the pipeline 123 of inboard case 53a is formed on the lower part place of inboard case 53a.In addition, the second casing 35b is formed with pipeline 124 (see figure 8)s.

The upside of change speed gear box 53a (inboard case 53a in more detail) is provided with the gas exhaust duct 146 of exhaust channel at interval.Although according to present embodiment, gas exhaust duct 146 is integrally formed with inboard case 53a, and gas exhaust duct 146 can separate formation with inboard case 53a.Gas exhaust duct 146 is formed by upwardly extending straight tube.But the concrete shape of gas exhaust duct 146 is unrestricted fully.

Gas exhaust duct 146 is covered by lid 147.Lid 147 is provided with carinate cross sectional shape, and it is to upper process.

Gas exhaust duct 146 is communicated with the space 126 that is formed between the inboard case 53a and the second casing 35b.Therefore, the air in the space 126 is directed to through gas exhaust duct 146 and covers 147 inner space 147c.

The top of lid 147 is formed with the protrusion 147a to upper process, and the bottom 21a of protrusion 147a overlapping body gate 21 on left and right directions.In other words, also in this embodiment, lid 147 body gaties 21 of overlapping.In addition, lid 147 and body gate 21 can directly overlap each other, and maybe can overlap each other by containment member etc.The bottom of lid 147 is by containment member 140 overlapping outside case 53b.

As shown in Figure 1, gas exhaust duct 146 is arranged in the upside between the axle center C2 of the axle center C1 of main axle 46c and accessory whorl axle 62.The upper end of gas exhaust duct 146 is arranged in the lower position of lower end 17a than the recessed space 17 that is positioned at vehicle seat 16 the place aheads.

Other structure is similar to first embodiment, and therefore the descriptions thereof are omitted.

According to present embodiment, air is inhaled into energy chamber 130 (seeing Figure 11) by the induction tract on the rear side that is arranged in leg protective cover 34R 131, air purifies by the filter (not shown), and afterwards, air is inhaled into band chamber 67 by induction tract 134 and connection pipe 96.The air that is drawn into band chamber 67 flows so that they are cooled off around main wheel 71, accessory whorl 72 and V-type band 73.

As shown in figure 13, the air that has cooled off main wheel 71, accessory whorl 72 and V-type band 73 passes through pipeline 123 discharges of inboard case 53a from band chamber 67, and flow to the space 126 between the inboard case 53a and the second casing 35b.In addition, the air in the space 126 is directed to by gas exhaust duct 146 and covers 147 inner space 147c, and is discharged to the outside by central aisle 11a.CVT30 is by above-mentioned air-flow cooling.

According to present embodiment, be positioned at central aisle 11a on the outside on the vehicle-width direction and be positioned at the space of change speed gear box 53 upsides can be by effectively as exhaust channel from band chamber 67 discharged air.Therefore, can guarantee the space of exhaust channel is installed and not make the size increase of body gate 21.As a result, can realize having the exhaust channel that foot has the flow path area, and can be so that the miniaturization of the raising of CVT30 cooling power and body gate 21 coordination.

＜the three embodiment 〉

(see figure 9) in first embodiment, body gate 21 and lid 45 form separately and overlap.In addition, compare with body gate 21, induction tract 136 is outwards arranged on vehicle-width direction.In addition, (see Figure 13) in a second embodiment, body gate 21 and lid 147 independently form and overlap.In addition, compare with body gate 21, induction tract 146 is outwards arranged on vehicle-width direction.But the lid of the body gate of central aisle and covering pipeline can be integrally formed at interval.

According to the 3rd embodiment shown in Figure 14, body gate 21 and lid 147 form in a second embodiment.In other words, lid 147 forms body gate 21 ground parts.Therefore, in an embodiment, 11a compares with central tube, and (left and right directions of Figure 14) freeing pipe 146 is arranged in the outside on vehicle-width direction, and compares with the external side end 21b of body gate 21, and it is positioned at the inboard on vehicle-width direction.By way of parenthesis, the dotted line L2 among Figure 14 represents the exterior boundary of central aisle 11a.

Other structure is identical with second embodiment.In addition, in this embodiment, can obtain and the second embodiment similar effects.

Although not shown in the drawings, (see figure 9) in first embodiment, the lid 45 of the body gate 21 of central aisle 11a and covering induction tract 136 can be integrally formed at interval.In this case, 11a compares with central aisle, and induction tract 136 is arranged in the outside on vehicle-width direction, and compares with the external side end of body gate 21, and induction tract 136 is arranged in the inboard on vehicle-width direction.

Industrial applicability

As mentioned above, the present invention can be used for the Straddle-type vehicle of motorcycle and so on.

Claims (15)

1. Straddle-type vehicle, it is the Straddle-type vehicle that comprises framework and vehicle seat and be formed with recessed space, be recessed to the downside of described vehicle seat front side in the above recessed space of its lateral plan, and wherein the rider is sitting on the described vehicle seat and by straddling described framework and comes steering vehicle, and described Straddle-type vehicle comprises:

Cover the body gate of described framework, its female space at interval on its outside, and central aisle at interval on the side within it;

Engine unit, by described frame supported on the downside in the female space, and comprise driving engine, V-type variable v-belt drive and be formed with the band chamber change speed gear box, wherein said V-type variable v-belt drive is contained in described band chamber interior; With

Air flue is communicated with described band chamber;

Wherein, described change speed gear box is arranged on the outside on vehicle-width direction of described driving engine, and is arranged in the downside in the female space when observing in the vehicle side view,

Described air flue is arranged in the outside on vehicle-width direction of described central aisle and the upside of described change speed gear box, and its upper end is lower than the lower end in the female space.

2. Straddle-type vehicle comprises:

Framework;

Engine unit by described frame supported, and comprises driving engine, V-type variable v-belt drive and is formed with the change speed gear box of being with the chamber that wherein said V-type variable v-belt drive is contained in described band chamber interior;

Put the pin member, it is arranged on the outside of described change speed gear box when observing in birds-eye view on vehicle-width direction, is used to support rider's pin; With

Air flue is arranged in the upside of described change speed gear box, is used for being communicated with described band chamber;

Wherein, when observing in birds-eye view, the external side end on the vehicle-width direction of described air flue is arranged in described inboard of putting the medial extremity on vehicle-width direction of pin member.

3. Straddle-type vehicle according to claim 1 and 2 also comprises the pipeline and the lid of described air flue at interval, and described the lid is open into the outside that the inboard is used to cover described pipeline on vehicle-width direction.

4. Straddle-type vehicle according to claim 1 also comprises:

The pipeline of the described air flue in interval; With

On vehicle-width direction, be open into the lid that the inboard is used to cover the outside of described pipeline;

Wherein, overlap each other described body gate and described cover.

5. Straddle-type vehicle according to claim 4, the inner space of wherein said lid and described central aisle communicates with each other.

6. Straddle-type vehicle according to claim 1 and 2, also comprise leg protective cover, described leg protective cover extends upward or in the above-below direction extension that tilts at upper and lower in the front side of described change speed gear box, and extends to the outside on vehicle-width direction of described air flue.

7. Straddle-type vehicle according to claim 1 and 2, wherein said air flue is being shorter in length than the length of described change speed gear box on fore-and-aft direction on the fore-and-aft direction.

8. Straddle-type vehicle according to claim 1 also comprises:

Put the pin member, it is arranged on the outside of described change speed gear box when observing in birds-eye view on vehicle-width direction, is used to support rider's pin;

Wherein, when observing in birds-eye view, the external side end on the vehicle-width direction of described air flue is arranged in described inboard of putting the medial extremity on vehicle-width direction of pin member.

9. Straddle-type vehicle according to claim 1 and 2, wherein said V-type variable v-belt drive comprise first wheel shaft and are arranged in second wheel shaft on the described first wheel shaft rear side;

At least a portion of wherein said air flue is arranged in the upside between described first wheel shaft and described second wheel shaft.

10. Straddle-type vehicle according to claim 1 and 2, wherein said change speed gear box comprises upper surface portion, described upper surface portion is in upwards the place ahead or inferoanterior bevelled state when vehicle operating; And

Wherein said air flue is formed with the air inlet port relative with the described upper surface portion of described change speed gear box.

11. Straddle-type vehicle according to claim 1 and 2, wherein said V-type variable v-belt drive comprises main wheel and accessory whorl, and described accessory whorl is arranged in described main wheel rear side and has the diameter bigger than the diameter of described main wheel;

Wherein, described change speed gear box comprises upper surface portion, and described upper surface portion is in to inferoanterior bevelled state when vehicle operating; And

Wherein said air flue is formed with the air inlet port relative with the described upper surface portion of described change speed gear box.

12. Straddle-type vehicle according to claim 1 and 2 also comprises the induction tract of described air flue at interval.

13. Straddle-type vehicle according to claim 1 and 2 also comprises trailing wheel and Poewr transmission mechanism, described Poewr transmission mechanism is used for the propulsive effort of described driving engine is passed to described trailing wheel.

14. Straddle-type vehicle according to claim 13, any in wherein said air flue and the described Poewr transmission mechanism is arranged on the right half part of described vehicle, and another is arranged on the left-half of described vehicle.

15. Straddle-type vehicle according to claim 1 is wherein compared with described body gate, described air flue is outwards arranged on vehicle-width direction.

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