CN1377806A - Small motorcycle vehicle - Google Patents

Abstract

A scooter type vehicle is capable of utilizing a limited space of a body frame effectively to further increase the capacity of a fuel tank. In a scooter type vehicle 10, a pair of left and right upper frames 113 extend rearwardly downwards from a head pipe 111 while a pair of left and right down tubes 114 extend downwardly from the head pipe 111 below the pair of upper frames 113 and lower ends of the down tubes 114 are extended rearwardly and coupled to lower portions of the pair of upper frames 113 such that a space portion Sp1 of a substantially triangular shape as viewed in side elevation surrounded by the pair of upper frames 113 and the pair of down tubes 114 is provided. A fuel tank 230 which tapers forwardly upwards along the upper frames 113 and the down tubes 114 is disposed in the space portion Sp1. A lower portion of the fuel tank 230 is swollen and covered with a removable under frame 143 which is positioned below the down tubes 114.

Description

Small size motorcycle

Technical field

The present invention relates to a kind of small size motorcycle.

Background technology

In small size motorcycle, have than relatively large vehicle, this small size motorcycle from the beginning pipe to the back lower place upper framework that hangs down, configuration Fuel Tank below this upper framework.Known this small size motorcycle has that for example Japanese kokai publication hei 10-203457 communique is two-wheeled " (hereinafter referred to as " prior art ").

Above-mentioned prior art such as this communique shown in Figure 24, (the numbering that numbering is quoted in the communique to be put down in writing of from the beginning managing 3.Below identical) the bottom hang down to the back lower place and be responsible for 61, from the beginning manage 3 the top pair of right and left downtake 62,62 that hangs down simultaneously downwards, with the lower end of this downtake 62,62 towards rear extension and be responsible for 61 and combine.Hang down in the mode across the person in charge 61 who passes overall width central authorities in the front portion of left and right sides downtake 62,62.

In addition, Fig. 4 of above-mentioned existing technology such as this communique, Fig. 8 and shown in Figure 24 are provided with by being responsible for the spatial portion that 61 (being equivalent to upper framework) and left and right sides downtake 62,62 surround, and are disposing Fuel Tank 8 along the person in charge 61 and downtake 62,62 in this spatial portion.

In addition, in small size motorcycle, also have a kind of watercooled engine, engine cooling of carrying with the relatively large small size motorcycle of the ratio of radiator and high capacity fuel tank.In such small size motorcycle, in order to improve the cooling effectiveness of radiator, adopt widely heat sink arrangements, simultaneously in the layout of its rear configuration driving engine at Vehicular body front.In addition, owing to the reason of configuration space etc. also closely disposes large-scale Fuel Tank and radiator or driving engine sometimes.When being such configuration relation, therefore Fuel Tank needs its countermeasure owing to be subjected to heat affecting from radiator or driving engine.As the technology that prevents from the heat affecting of radiator or driving engine, known have a for example TOHKEMY 2000-229593 communique " motor scooter type motor-driven cart " (hereinafter referred to as " prior art ").

Above-mentioned prior art two-wheeled, shown in Figure 2 as this communique is in the Vehicular body front configuration radiator 26 (numbering that numbering is quoted in the communique to be put down in writing.Below identical) at rear vehicle configuration driving engine 20, configuration Fuel Tank 30 between radiator 26 and driving engine 20.

In addition, in above-mentioned prior art,, the barrel-contoured fuel tank cap 40 above the sealing from covering on the Fuel Tank 30, under this state, is installed in Fuel Tank 30 on the vehicle frame as this communique Fig. 2～shown in Figure 4.Like this, can prevent to give the heat affecting of Fuel Tank 30 by fuel tank cap 40 from radiator 26 and driving engine 20.Fuel tank cap 40 is integrally formed product of soft resin.

In addition, as the high-tension coil arrangement of small motor cycle type cart, known have a for example TOHKEMY 2000-310174 communique " the some coil unit installation constitution of oscillating type power unit ".

Fig. 1 and Fig. 2 of above-mentioned technology such as this TOHKEMY 2000-310174 communique are installed in oscillating type power unit 21 on the oscillating axle 92 of vehicle frame 11 sides swingably, in driving engine 22 the place aheads of this oscillating type power unit 21 ignition coil unit 25 are installed.

In addition, as the chassis structure of small size motorcycle, known have a for example Japanese kokai publication hei 10-203460 communique " small size motorcycle ".

Above-mentioned technology is according to Fig. 3 of Japanese kokai publication hei 10-203460 communique, from the beginning manage 3 secondary framework 55L, 55R about extending, from the beginning manage 3 and extend preceding pipe 52, before this, connecting left right rear tubes 54L, 54R (hereinafter referred to as " back framework ") by Y word joint 53 on the pipe 52, connecting the rear end of secondary framework 55L, 55R on these backs pipe 54L, 54R respectively, the secondary framework rear strut bar 64 (hereinafter referred to as " crossbeam ") that sets up コ word shape between secondary framework 55L, 55R (hereinafter referred to as " decline framework " (back framework 54L, 54R)) carries out armored frame 2.

; the small size motorcycle of the Japanese kokai publication hei 10-203457 communique of above-mentioned prior art, shown in Figure 8 as it, disposing Fuel Tank 8 in base plate; but when carrying out the reinforcement of vehicle frame for the rigidity that improves vehicle frame, the space of configuration Fuel Tank 8 is limited.On the other hand, large-scale small size motorcycle is because not only require the vehicle frame rigidity, but also needs increase travel distance, therefore need increase propellant capacity as far as possible.

In addition, therefore the fuel tank cap 40 of the motor scooter type motor-driven cart of above-mentioned TOHKEMY 2000-229593 communique is large-scale member owing to be to cover on the Fuel Tank 30.For the so large-scale lid of moulding integratedly, need large-scale forming metal mold, this just causes manufacturing cost to increase.And, make the fuel cap 40 of the complicated shape that coincide with the shape of Fuel Tank 30 and we can say it also is very difficult.

In addition, at for example small motor cycle type cart of above-mentioned TOHKEMY 2000-310174 communique is when having the small size motorcycle of big free air capacity, the cal val of driving engine is big, in order to cover with the car body cover around this driving engine, therefore in the ignition coil unit installation constitution of above-mentioned oscillating type power unit, have because the heat that driving engine produced becomes hi-heat danger around making high-tension coil.

In addition, itself also generates heat high-tension coil, therefore also presses for the situation of considering the high-tension coil self-heating.

Small size motorcycle as above-mentioned Japanese kokai publication hei 10-203460 communique, in small size motorcycle, be connected the decline framework rear that descends backward on the pipe and from the beginning manage 3 away from pair of right and left back framework below supporting engine, from this relation, be accompanied by the maximization of driving engine, vehicle frame 2 also maximizes, and the vehicle frame integral intensity increases.According to different situations sometimes needs strengthen keeping rigidity with crossbeam etc.In addition, also seek the easily comfortable vehicle frame of taking sensation sometimes.

That is, be the vehicle frame that can change rigidity when wanting to realize guaranteeing the vehicle frame whole rigidity according to purposes.

Summary of the invention

Therefore, the purpose of this invention is to provide a kind ofly when guaranteeing the vehicle frame rigidity, improved, effectively utilize the technology that limited space can further increase propellant capacity by configuration to the car body framework.

Another object of the present invention provide a kind of can be easily and the qurer manufacturing be used for the technology of the cleading of Fuel Tank.

Another purpose of the present invention provides a kind of heat affecting that is difficult to be subjected to driving engine, can make the high-tension coil arrangement of the small size motorcycle that the thermal runaway that produces from high-tension coil self goes out efficiently.

Another purpose of the present invention provides a kind of chassis structure that can easily change the small size motorcycle of rigidity.

In order to achieve the above object, the small size motorcycle of first technical scheme of the present invention, wherein, from the beginning pipe is to the back lower place pair of right and left upper framework that hangs down, below this a pair of upper framework, from the beginning manage the pair of right and left downtake that hangs down downwards, the lower end of these downtakes is rearward extended and combine with the bottom of a pair of upper framework, thus, the side-looking that formation is surrounded by a pair of upper framework and a pair of downtake is the spatial portion of fundamental triangle, in this space, dispose the anterior pointed Fuel Tank of front end of kicking up along upper framework and downtake, the bottom of this Fuel Tank is bloated, cover the bottom of this Fuel Tank with the framework that removably descends that is positioned at the downtake below simultaneously.

Because constituting the raise the head side-looking of tapered of the place ahead by pair of right and left upper framework and pair of right and left downtake is leg-of-mutton spatial portion, therefore, has not only improved the rigidity of vehicle frame, because spatial portion is that side-looking is a triangle, so accommodation space also diminishes.

In order to effectively utilize the space segment of this fore-upper part, the fore-upper part of Fuel Tank is formed tapered, can increase propellant capacity thus.In addition, because about a pair of upper framework is configured in, so the vehicle frame rigidity is improved, and extends to space between these upper frameworks by the top with Fuel Tank simultaneously, can increase fuel tank capacity.In addition, owing to, come the increase capacity downwards, also can protect Fuel Tank even therefore Fuel Tank is extended from downtake with removably descending framework to cover the bottom of Fuel Tank.Like this, by maximally utilising limited space, can increase propellant capacity.

In addition, owing to be the kick up Fuel Tank that is generally triangular of front end tapered of front portion, so center of gravity is in downside.By carrying the Fuel Tank of such low center of gravity, can reduce two-wheeled center of gravity.

The small size motorcycle of second technical scheme of the present invention, its Fuel Tank has the hermetic type lid at oil filling port, be provided with the odd-side of ventilation usefulness simultaneously on top, an end is connected this ventilation and passes between upper framework and the downtake along Fuel Tank with flexible pipe with the ventilation on the odd-side.

By ventilation is being set uses odd-side, can in Fuel Tank, refuel the height of oil filling port than the oil filling port with hermetic type lid is more upper.Because the oil level that refuels rises, and can increase to the Fuel Tank delivery volume.

The small size motorcycle of the 3rd technical scheme of the present invention is connected ventilation with an end and branches into two strands of shapes with the ventilation on the odd-side with the other end of flexible pipe.

Even the side in the other end of two bursts of shape branches has stopped up, also can ventilate by the opposing party.Its result can more positively guarantee the aeration between odd-side and atmosphere.

The small size motorcycle of the 4th technical scheme of the present invention, it is small size motorcycle with low-floor type pedal, it is characterized in that, at the anterior configuration of pedal radiator, at the rear portion of pedal configuration driving engine, between radiator and driving engine, dispose Fuel Tank, the cleading that configuration is cut apart on the front and back at least of this Fuel Tank.

To be used to prevent that the cleading from the heat affecting of driving engine or radiator is segmented in the front and back at least of Fuel Tank.Owing to be the cleading of cutting apart, can consider from the degree of the heat affecting of driving engine or radiator and be left any and minimal size accordingly with the shape of each face of Fuel Tank simultaneously.Each cleading is smaller as a result for it, makes also as easy as rolling off a logly, and because forming metal mold is little, material is also few, therefore can make each cleading at an easy rate.In addition, owing to be the cleading of cutting apart, can after being installed in Fuel Tank on the car body each cleading be mounted freely on the car body, installation exercise is good.

The small size motorcycle of the 5th technical scheme of the present invention is characterized in that, the cleading that is configured on the Fuel Tank front is the resinite sheet of double as radiator wind-guiding guide member, is configured between the downtake and Fuel Tank that from the beginning pipe hangs down.

Owing to be the cleading that constitutes by the resinite sheet, therefore be the extremely simple member of shape, can make more at an easy rate.In addition, because cleading is configured between downtake and the Fuel Tank, can simply cleading be installed on the downtake.Therefore, the installation exercise of cleading is good.In addition, because the cleading double as is a radiator wind-guiding guide member, therefore do not need other wind guide member, its number of parts is few.

The small size motorcycle of the 6th technical scheme of the present invention is characterized in that, being configured in the back of Fuel Tank or the cleading on the left side and the right side is the rubber film-making, and top is installed on the vehicle frame.

Owing to be the rubber film-making, therefore can freely be out of shape, can freely be configured with the space around the Fuel Tank with matching.And, by effectively utilizing Fuel Tank narrow space on every side, can dispose simply, in addition, owing to be the cleading that constitutes by sheet, so shape is extremely simple, can make more at an easy rate.

The small size motorcycle of the 7th technical scheme of the present invention, this vehicle is the small size motorcycle with low-floor type pedal, it is characterized in that, in the high-tension coil arrangement of its small size motorcycle, at the rear portion of pedal configuration driving engine, at the anterior bottom configuration driving engine high-tension coil of pedal.

For example, be when having the small size motorcycle of big free air capacity at vehicle, because the cal val of driving engine is big, when adopting the structure that covers with the car cover around this driving engine, need consider its heat fully.

Therefore,,, can use coil away from driving engine engine ignition, make it not to be subjected to the heat affecting of driving engine at the anterior bottom configuration driving engine high-tension coil of pedal by at the rear portion of pedal configuration driving engine.

Its result can prolong the life-span of driving engine with high-tension coil.

In addition, by anterior bottom configuration driving engine high-tension coil, can effectively utilize the space of the below of low-floor type pedal at pedal.

The small size motorcycle of the 8th technical scheme of the present invention is characterized in that, at pedal the place ahead configuration engine cooling radiator, and configuration engine ignition coil before this engine cooling is with radiator.

By, at pedal the place ahead configuration engine cooling radiator, configuration engine ignition coil before this engine cooling is with radiator, thus can make it not to be subjected to heat affecting from the air draft of radiator, can dispel the heat to the heat of driving engine simultaneously with high-tension coil self generation.

The small size motorcycle of the 9th technical scheme of the present invention, it is characterized in that, at pedal the place ahead configuration engine cooling radiator, the recurrent canal that returns cooling water expansion tank leads to the engine cooling radiator from this driving engine with keeping left or keep right than width over sides of car body central authorities.Position configuration driving engine high-tension coil at relative overall width central authorities and recurrent canal opposition side.

By the position configuration driving engine high-tension coil with the recurrent canal opposition side, can make driving engine not be subjected to heat affecting from recurrent canal with high-tension coil in relative overall width central authorities.

The small size motorcycle of the tenth technical scheme of the present invention, it is characterized in that, rearward extend framework after the pair of right and left from the rear portion of the preceding framework that links to each other with the head pipe, by these back supporting framework vehicle seat and posterior bumper, the rear of framework and below the framework of above-mentioned a pair of back, dispose driving engine before above-mentioned, above driving engine, after the pair of right and left between framework releasably crossbearer crossbeam.

In motor scooter, be accompanied by the maximization of driving engine, require the corresponding strength that has of car body, therefore need strengthen keeping its rigidity with crossbeam etc.In addition, also needing is the vehicle frame with easily comfortable taking sense.

Therefore, above driving engine, after the pair of right and left between framework releasably crossbearer crossbeam, for example, the rigidity of vehicle frame can be adjusted by becoming the structure that can change crossbeam easily with screw is fastening.

In addition, by above driving engine,, can easily carry out the maintenance around the driving engine at crossbearer crossbeam releasably between framework after the pair of right and left.

The small size motorcycle of the 11 technical scheme of the present invention is characterized in that, framework is the member of lengthwise shape of cross section after the pair of right and left.

At this, so-called lengthwise shape of cross section refers to linear foot cun than crossfoot cun big shape of cross section, by after-frame being become the member of lengthwise shape of cross section, therefore when can guarantee to be used for the vertical rigidity of supporting saddle and posterior bumper fully, can suppress the increase of lateral rigidity.Its result can realize the lightweight of vehicle, can guarantee easily comfortable taking sense simultaneously.

The small size motorcycle of the 12 technical scheme of the present invention is characterized in that, when vehicle seat is the vehicle seat of open and close type, is crossbeam with the vehicle seat hinge double as that supports the open and close type vehicle seat.

Vehicle seat hinge double as by will supporting the open and close type vehicle seat is a crossbeam, can realize the minimizing of the quantity of constituent part, can reduce the cost of vehicle frame.In addition, owing to the vehicle seat hinge can be taken off from vehicle frame, can more easily carry out the change of vehicle seat hinge shape or the maintenance around the driving engine.

Description of drawings

Fig. 1 is a two-wheeled left side External view of the present invention.

Fig. 2 is a two-wheeled right side External view of the present invention.

Fig. 3 is a sectional side view of the present invention.

Fig. 4 is the block diagram of vehicle frame of the present invention.

Fig. 5 is the left view of vehicle frame of the present invention, driving engine, Poewr transmission mechanism and vehicle seat.

Fig. 6 is the sectional view of two-wheeled anterior bottom of the present invention.

Fig. 7 is the block diagram around the Fuel Tank of the present invention.

Fig. 8 be Fig. 68 to view.

Fig. 9 is the 9-9 line section-drawing of Fig. 8.

Figure 10 is two-wheeled elevation cross-sectional view.

Figure 11 is the action diagram around the radiator of the present invention.

Figure 12 is the mode chart of Fuel Tank of the present invention.

Figure 13 is the oil filling port back pseudosection on every side of Fuel Tank of the present invention.

Figure 14 is the right side External view of vehicle frame of the present invention and Fuel Tank.

Figure 15 is the block diagram of two-wheeled tank cover that has carried the chassis structure of small size motorcycle of the present invention.

Figure 16 is the back view of two-wheeled tank cover that has carried the chassis structure of small size motorcycle of the present invention.

Figure 17 is the exploded perspective view of two-wheeled hinge structure that has carried the chassis structure of small size motorcycle of the present invention.

Figure 18 is the side cutaway view of two-wheeled tank cover that has carried the chassis structure of small size motorcycle of the present invention.

Figure 19 is the Action Specification figure of the two-wheeled tank cover that adopts that has carried the chassis structure of small size motorcycle of the present invention.

Figure 20 has carried carrying that chassis structure two-wheeled of small size motorcycle of the present invention the adopt instruction diagram with the rope installation constitution.

Figure 21 is the lateral plan of the main support installation constitution that chassis structure adopted of small size motorcycle of the present invention.

Figure 22 is the lateral plan of the main support that chassis structure adopted of small size motorcycle of the present invention.

Figure 23 is the detection that chassis structure the adopted lid side cutaway view on every side of small size motorcycle of the present invention.

Figure 24 is the exploded perspective view of thermal insulation construction below the vehicle seat that chassis structure adopted of small size motorcycle of the present invention.

The block diagram of the vehicle seat lower disc mounting position that chassis structure adopted of Figure 25 small size motorcycle of the present invention.

The specific embodiment

Below, embodiments of the invention are described with reference to the accompanying drawings." preceding ", " back ", " left side ", " right side ", " on ", D score is the direction of seeing according to chaufeur.In addition, accompanying drawing also be along symbol towards the figure that sees.

Fig. 1 is a two-wheeled left side External view of the present invention, represents that two-wheeled 10 is the small size motorcycles with low-floor type pedal 25.

Cover two-wheeled 10 vehicle frame single-piece car cover 20 by front fairing 21, last cover 22, inner cover 23, central cover 24, low-floor type pedal 25, pedal skirt section 26, rear side cover 27, back cover 28 constitutes, this front fairing 21 covers vehicle frame described later front portion and front-wheel top, should go up the upper opening that cover 22 covers front fairing 21, inner cover 23 covers the rear portion of front fairing 21, central cover 24 rearward extends and covers the length central portion of vehicle frame from the rear end of inner cover 23, low-floor type pedal 25 extends to foreign side from the lower end outer rim of central cover 24, the pin that is used for the mounting chaufeur, extend downwards from the outer rim of low-floor type pedal 25 in pedal skirt section 26, rear side cover 27 rearward extends and covers the rear lateral portion of vehicle frame from central cover 24, back cover 28 rearward extends from the rear end of rear side cover 27, and covers the rear portion of vehicle frame.

The top of front fairing 21 has transparent windscreen 31, and inner cover 23 has the legging cover 91 of the shank front portion that covers chaufeur.

In addition, two-wheeled 10 have bar handle 203 at Vehicular body front, have vehicle seat 208 and pedal base 300 at rear vehicle.

Handle 203 is that handgrip 203a, 203a are than shape higher and that rearward draw.Cover this handle 203 with handle cover 101.Handle cover 101 is made of the lower handle cover 102 of the bottom, the left and right sides that covers handle 203 and the upper handle cover 103 on the top that covers handle 203.

Vehicle seat 208 is double formula seats, the anterior 208a of the vehicle seat of being taken by the driver and constitute with the vehicle seat rear portion 208b that the person of taking advantage of takes.Pedal base 300 is adjacent to disposing with the rear portion of central cover 24, can take in be installed with exposing with the person's of taking advantage of step use with the person's of taking advantage of pedal 301.

Among the figure, the 261st, head light, the 262nd, turning indicator, the 263, the 263rd, back mirror, the 264th, front fender apron, the 265th, vehicle seat locking lock, the 266th, back deflecting plate, the 267th, taillight, the 268th, rear mudguard, the 269th, assistant support, the 320th, main support.

In addition, the 271, the 272nd, main hydraulic cylinder is by the operation generation brake fluid pressure of brake rod 273,274.

Fig. 2 is a two-wheeled right side External view of the present invention, is illustrated in the top of front fairing 21 and the rear of windscreen 31 and has instrument carrier panel 92.As seen from the above description, can have windscreen 31, spats cover 91 and instrument carrier panel 92 at Vehicular body front.

In addition, the figure shows on two-wheeled 10 right side and also disposing and situation about having with the pedal base 300 of the person's of taking advantage of pedal 310.The 275th, the exhaust silencer.

Fig. 3 is an expression two-wheeled side cutaway view of the present invention, is to see two-wheeled 10 figure from left side side.

Two-wheeled 10 is small size motorcycles, and its main composition has: vehicle frame 110, about be installed in front fork 201 on the head pipe 111 of vehicle frame 110 swingably, be installed in the front-wheel 202 on the front fork 210, with the above-mentioned handle 203 of front fork 210 bonded assemblys, be installed in the driving engine 211 at the rear portion of vehicle frame 110, with driving engine 211 be the Poewr transmission mechanism 212 that middle heart can swing up and down with the bent axle of driving engine 211 independently, be installed in the trailing wheel 205 at the rear portion of Poewr transmission mechanism 212, the rearward end of Poewr transmission mechanism 212 is suspended on back buffer parts 206 on the vehicle frame 110, be installed in the containing box 207 on the top, rear portion of vehicle frame 110, dispose the above-mentioned vehicle seat 208 that is installed on the containing box 207 with switching ground.

Front fork 201 is the door shape front forks that are configured in head pipe 111 belows.Cover the top and the head pipe 111 of this front fork 201 by front fairing 21.

Driving engine 211 be with about two cylinder heads 215 to the some bevelleds in front upper place, water cooled two cylinder engines that disposing to approximate horizontal.

Poewr transmission mechanism 212 with the transmission of power of driving engine 211 to trailing wheel 205.It is the belt converter type toric transmission that has centrifugal clutch.

Containing box 207 is along car body fore-and-aft direction casing slenderly, can take in two helmet Hf, Hr before and after it, constitutes by lower part box 207a with the overlapping upper box body 207b in the upper back of this lower part box 207a.

281 is the airfilters that are configured in the side of containing box 207 among the figure, the 282nd, and connection pipe, the 283rd, be configured in the energy chamber, the 284th in the place ahead of containing box 207, damper, the 285th, aspirate tube, the 286th, storage battery.

Fig. 4 is the block diagram of vehicle frame of the present invention, vehicle frame 110 be by welding will with the one vehicle frame of two gun carriage types of framework 115,115 be combined intos after head is managed the pair of right and left of the rear portion of 110 preceding frameworks that link to each other 112 and the past framework 112 rearward extending.Head pipe 111 has fairing support carriage 11a.

In the preceding framework 112, from the beginning manage 111 to the back lower place pair of right and left upper framework 113,113 that hangs down, below this a pair of upper framework 113,113, from the beginning manage the 111 pair of right and left downtakes 114,114 that hang down downwards, the lower end of this a pair of downtake 114,114 is rearward extended and is combined with the lower end (bottom) of a pair of upper framework 113,113, extends to the back upper place again.

In more detail, the top of head pipe 111 in conjunction with about the front end of upper framework 113,113, this upper framework 113,113 extends to the back lower place, and, front end with left and right sides downtake 114,114 below this upper framework 113,113 combines with the bottom of head pipe 111, and this downtake 114,114 extends downwards.

Because be the preceding framework 112 of such structure, therefore can constitute the side-looking that is surrounded by a pair of upper framework 113,113 and a pair of downtake 114,114 is the spatial portion Sp1 of fundamental triangle shape.Therefore, can improve the rigidity of vehicle frame.But therefore this spatial portion Sp1 is narrow spatial portion owing to be the shape of side-looking for the anterior taper of kicking up.

In addition, on head pipe 111 at the front end of downtake 114,114 than the position configuration of the front end decline specified altitude of upper framework 113,113.Its result is the fore-upper part of the Sp1 of expansion space portion more.

Between the front end of the front of left back framework 115 and right back framework 115, face first crossbeam 121 of a shape athwart, second crossbeam 122 athwart between the lower end of the lower end of upper left framework 113 and upper right framework 113, at the overall width middle position of this second crossbeam 122 in conjunction with driving engine with first carriage 123.

Between the horizontal component rearward end of the horizontal component rearward end of left downtake 114 and right downtake 114, stride and establishing the 3rd crossbeam 124, at the overall width middle position of the 3rd crossbeam 124 in conjunction with driving engine with second carriage 125, in the combination of the rear end of left and right sides downtake 114,114 about driving engine with the 3rd carriage 126,126.

An end of framework 115,115 combines with the mid-length portion of pair of right and left upper framework 113,113 after the pair of right and left, and its other end rearward extends simultaneously, is the member of lengthwise shape of cross section.At this, so-called " lengthwise shape of cross section " refers to the longitudinal size shape of cross section bigger than lateral dimension.Specifically, back framework 115,115 is made of the square tube of the rectangular cross section of lengthwise.

The invention is characterized in that releasably crossbearer three crossbeams 131～133 between framework after the pair of right and left 115,115.Specifically, about the back framework 115,115 between from the place ahead sequentially crossbearer anterior after cross member 131, middle part after cross member 132 and rear portion after cross member 133.

It is also fastening on the upper surface of framework 115,115 after these three crossbeams 131～133 overlap with screw.Owing to be framework 115,115 after the square tube, can easily three crossbeams 131～133 be installed with the state of mounting.

It is the member of a shape that anterior after cross member 131 is faced, from about erect part and forwards during overlooking, extend back open U word shape strut bar 131a, on the front end of this U word shape strut bar 131a in conjunction with vehicle seat hinge support portion 131b, simultaneously, forwards extend from the front end of U word shape strut bar 131a and to prolong member 131c, this prolong on the front end of member 131c by screw fastening first crossbeam 121.Middle part after cross member 132 is shaft-like members, and the not shown vehicle seat locking key member that is used to keep is installed under the state of having closed vehicle seat 208 (with reference to Fig. 3).Rear portion after cross member 133 is made by aluminium pressure diecasting, is the ribbon-shaped members of preceding open U word shape in overlooking.

In addition, the increase of the lateral rigidity of the back framework 115,115 the during rear end that prevented to connect back framework 115,115 by fastening this after cross member 133 of screw, thereby the influence that travelling comfort is brought.In addition, the not shown vehicle seat locking key member that is used to keep under the state of having closed vehicle seat 208 also is being installed on the rear portion after cross member 113.Promptly be by unloading the fastening structure that can vehicle seat hinge 208c or vehicle seat locking key be unloaded from vehicle frame 110 with crossbeam 131～133 with bolt.

In addition, about the rear portion of back framework 115,115 in conjunction with left and right sides energy disperser with carriage 134,134, about between the rear portion of back framework 115,115 across and welding and just be considered as the roughly rear lower after cross member 135 of U word shape, on this rear lower after cross member 135 in conjunction with about carrying with hook 136,136.

In addition, by rear lower after cross member 135 being formed U word shape, the lateral rigidity that the connection at the rear portion of framework 115,115 brings after can preventing to be accompanied by increases, and can improve travelling comfort.

And, representing among this figure pair of right and left pedal strut bar 141,141 and lower member 143 releasably are installed on above-mentioned vehicle frame 110, a plurality of pins 144 that have head are installed simultaneously ... (... represent a plurality of, below identical).

In detail, about pedal strut bar the 141, the 141st, support the member of low-floor type pedal 25 (with reference to Fig. 1), be by the member on the carriage 145,145,146,146 that is bolted to left and right sides downtake 114,114.

Right-hand tread plate strut bar 141 is the members that by strut bar 142 engine ignition releasably are installed in its front end bottom by bolt 227,227 with coil 226.

The high-tension coil 226 that is installed in the bottom of downtake 114 is configured in the position more the next than low-floor type pedal 25.

Following framework 143 is to hang down the member of ground crossbearer between the horizontal component of left and right sides downtake 114,114, on the carriage 146,146,147,147 that is bolted to downtake 114,114.

Such lower member 143 is made of left and right sides member 143a, 143a and the centre cross member 143b and the rear portion crossbeam 143c of crossbearer between the rear end of side member 143a, 143a of crossbearer between the mid-length portion of side member 143a, 143a that the horizontal component along downtake 114,114 extends.The 148th, hang the hook of fixing Fuel Tank described later with cleading.

Take the lead pin 144 ... be to hang the member of fixing Fuel Tank described later, about the front portion of the outside portion of left and right sides upper framework 113,113 and left and right sides downtake 114,114 and first crossbeam 121, be provided with 6 altogether with cleading.In the drawings, the 151st, front cross rail, the 152,152, the 153rd, strut bar.

Fig. 5 is the left side view that has carried driving engine, Poewr transmission mechanism, vehicle seat on the vehicle frame of the high-tension coil arrangement that has adopted small size motorcycle of the present invention.Disposing driving engine 211 and Poewr transmission mechanism 212 at the rear of preceding framework 112 and below the framework 115,115 of a pair of back, preceding framework 112 and about back framework 115 (only represent its left half in the figure, below identical) connecting bridge near driving engine 211 is installed.

Specifically, being provided with the side-looking that is surrounded by a pair of upper framework 113,113, a pair of downtake 114,114 and a pair of back framework 115,115 at the rear portion of preceding framework 112 is the spatial portion Sp2 of general triangular shape, the cylinder head 215 and the housing 216 of configuration driving engine 211 in this spatial portion Sp2, the anterior bottom of driving engine 211 is installed on first carriage 123 at driving engine, at driving engine the rear lower of driving engine 211 is installed on second carriage 125, the top, rear portion of driving engine 211 is installed on the 3rd carriage 126,126 at driving engine.Anterior middle part after cross member 131,132 is configured in the top of driving engine 211.

In addition, putting down in writing in the figure (1) about the energy disperser rearward end that hanging Poewr transmission mechanism 212 by left and right sides posterior bumper parts 206,206 on carriage 134,134, (2) anterior after cross member 131 double as are the member of the vehicle seat hinge 208c of supporting open and close type vehicle seat 208.Like this, can support back buffer parts 206,206 and vehicle seats 208 with back framework 115,115.

Promptly, the chassis structure of small size motorcycle of the present invention can be described as framework 115 after rearward extending pair of right and left from the rear portion of the preceding framework 112 that links to each other with head pipe 111,115 (sides 115 not shown), by these back framework 115 supporting back buffer parts 206,206 (sides 206 not shown) and vehicle seat 208, at the rear of front part 112 and at a pair of back framework 115,115 below is setting in the vehicle frame of small size motorcycle of driving engine 211, above driving engine 211, framework 115 after pair of right and left, 115 releasably crossbearer crossbeam 131～133 (133 with reference to Fig. 4).

In small size motorcycle, be accompanied by the maximization of driving engine and require vehicle frame to have corresponding strength, need strengthen keeping rigidity with crossbeam etc.In addition, also require vehicle frame to have easily comfortable taking sense.

Therefore, above driving engine 211, after pair of right and left 115,115 of frameworks releasably frame crossbeam 131～133, for example, can easily adjust the rigidity of vehicle frame 110 by become the structure that can easily change crossbeam 131～133 by bolted.

In addition, by above driving engine 211, after pair of right and left 115,115 of frameworks releasably frame crossbeam 131～133, can easily carry out the maintenance around the driving engine 211.

In addition, the chassis structure of small size motorcycle of the present invention also can be described as the member that framework after the pair of right and left 115,115 (side 115 not shown) is become the lengthwise shape of cross section.

At this, so-called lengthwise shape of cross section refers to the longitudinal size shape of cross section bigger than lateral dimension, by the back framework being become the member of lengthwise shape of cross section, vertical rigidity of supporting saddle 208 and posterior bumper parts 206,206 (posterior bumper) can be fully guaranteed to be used for, the increase of lateral rigidity can be suppressed simultaneously.Its result can realize the lightweight of vehicle and can guarantee comfortable taking sense.

In addition, when the chassis structure of small size motorcycle of the present invention is the vehicle seat of open and close type at vehicle seat 208, make the anterior crossbeam 131 (crossbeam) of member double as of the vehicle seat hinge 208c of supporting open and close type vehicle seat.

The member double as of vehicle seat hinge 208c by making supporting open and close type vehicle seat is anterior crossbeam 131, can reduce the number of parts of constituent part, can reduce the cost of vehicle frame 110.In addition, because vehicle seat hinge 203c can be unloaded from vehicle frame 110, can carry out the shape change of vehicle seat hinge 203c and the maintenance around the driving engine 211 more easily.

Fig. 6 is the side cutaway view of two-wheeled anterior bottom that has carried the chassis structure of small size motorcycle of the present invention, is to see two-wheeled 10 figure from left side side.Disposing driving engine 211 at rear portion by the low-floor type pedal of representing with long and two-short dash line 25, disposing engine cooling radiator 221 in the front portion of pedal 25, anterior bottom at pedal 25 is disposing high-tension coil 226, is disposing Fuel Tank 230 between driving engine 211 and radiator 221.

That is, radiator 221 is configured in driving engine 211 the place aheads and left and right sides downtake 114,114 (has only been represented the left downtake in the figure.As follows) before.

Are the flexible pipes that pass through along (side in front of the people the figure) side that keeps left than overall width central authorities from driving engine 211 to the recurrent canal 222 that radiator 221 returns refrigerant fluid.Specifically, the recurrent canal 222 that links to each other with the liquid return port of driving engine 211 extends along the horizontal component of left downtake 114 and the anterior part that hangs down thereof, and is connected with the upper tank of radiator 221.

In addition, supplying the feed pipe 223 of refrigerant fluid from radiator 221 to driving engine 211 is the flexible pipe that passes through along the side (the people's opposite side the figure) of keeping right than overall width central authorities.Specifically, rearward extend along right downtake 111 (the people's opposite side among the figure), be connected with the liquid inlet of driving engine 211 with the bottom water tank 211b bonded assembly feed pipe 223 of radiator 211.The 224th, the radiator fan.

High-tension coil 226 is configured in before the right positions (the people's opposite side among the figure) and radiator 221 of relative overall width central authorities and recurrent canal 222 opposition sides.

Like this, high-tension coil 226 can be configured in (1) and not be subjected to position from the heat affecting of driving engine 211, (2) are not subjected to the position from the air draft heat affecting of radiator 221, and (3) are not subjected to the position from the heat affecting of recurrent canal 222.

Fuel Tank 230 is configured among the spatial portion Sp1 that is surrounded by pair of right and left upper framework 113,113 and pair of right and left downtake 114,114, and it is pointed that this spatial portion Sp1 side-looking is the place ahead front end of kicking up.

Such Fuel Tank 230 is in order to effectively utilize spatial portion Sp1, as shown in figure when the car body side is seen, is the container that lifts the front end tapered along the place ahead of upper framework 113,113 and downtake 114,114.That is, in order to effectively utilize the space segment of the fore-upper part among the spatial portion Sp1, the fore-upper part of Fuel Tank 230 is formed tapered, the bottom of Fuel Tank 230 is bloated.Thus, can increase the capacity of Fuel Tank 230.

And, since about dispose upper framework 113,113, therefore, extend to the space of 113,113 of these upper frameworks and can increase capacity by top with Fuel Tank 230.

Like this, by maximally utilising limited space, can increase the capacity of Fuel Tank 230.

In addition, Fuel Tank 230 extends its underpart for the increase capacity to the below of downtake 114,114.The bottom of Fuel Tank 230 that extends to the below of downtake 114,114 is covered by the framework 143 of removably descending of the below that is positioned at downtake 114,114, can protect Fuel Tank 230 thus.Like this, by Fuel Tank 230 being extended to the below of downtake 114,114, can increase capacity.After below vehicle frame 110, Fuel Tank 230 being inserted spatial portion Sp1 and installing, framework 143 under installing on the car body framework 110.

In addition, owing to be the front portion pointed leg-of-mutton Fuel Tank 230 of front end of kicking up, so its center of gravity is in downside, by the Fuel Tank 230 that carries such low center of gravity, two-wheeled 10 center of gravity descended.

The high-tension coil arrangement of small size motorcycle of the present invention is in the small size motorcycle with low-floor type pedal 25, at the rear portion of pedal 25 configuration driving engine 221, at the anterior bottom configuration driving engine high-tension coil 226 of pedal 211.

For example, be that the cal val of driving engine is big when having the small size motorcycle of big free air capacity at vehicle, owing to be to be covered with this driving engine structure on every side, therefore need consider the influence of this heat fully with the car cover.

Therefore,, dispose driving engine with high-tension coil 226, can make it not be subjected to the heat affecting of driving engine 211 with high-tension coil 226 away from driving engine 211 in the anterior bottom of pedal 211 by at the rear portion of pedal 25 configuration driving engine 221.

Its result can prolong the life-span of driving engine with high-tension coil 226.

By anterior bottom configuration driving engine high-tension coil 226, can effectively utilize the space of the below of low-floor type pedal 25 at pedal 211.

The high-tension coil arrangement of small size motorcycle of the present invention with radiator 221, uses the place ahead of radiator 221 to dispose driving engine high-tension coil 226 at this engine cooling at the place ahead of pedal 25 configuration engine cooling.

Dispose engine cooling radiator 221 by the place ahead at pedal 25, at the place ahead configuration driving engine high-tension coil 226 of this engine cooling with radiator 221, can make driving engine not be subjected to air draft heat affecting, can make by driving engine to shed with the heat that high-tension coil 226 produces from radiator 221 with high-tension coil 226.

In addition, the high-tension coil arrangement of small size motorcycle of the present invention can be described as at pedal 25 front and back configuration engine cooling radiator 221, to return left side or the right side of the recurrent canal 222 of cooling water expansion tank to engine cooling with radiator 221 from this driving engine 211, use the structure of high-tension coil 226 at the position configuration driving engines of relative overall width central authorities and recurrent canal 222 opposition sides in overall width central authorities.

By driving engine is configured in the position of relative overall width central authorities and recurrent canal 222 opposition sides with high-tension coil 226, can make driving engine not be subjected to heat affecting from recurrent canal 222 with high-tension coil 226.

Fuel Tank 230 is configured among the spatial portion Sp1 that is surrounded by pair of right and left upper framework 113,113 and pair of right and left downtake 114,114, and this spatial portion Sp1 side-looking is the front portion pointed fundamental triangle shape of front end of kicking up.Such Fuel Tank 230 is in order to effectively utilize spatial portion Sp1, as shown in figure when the car body side is seen, is the pointed container of front end of kicking up along the front portion of upper framework 113,113 and downtake 114,114.That is,, the bottom of Fuel Tank 230 is extended to the below of downtake 114,114 in order to increase the capacity of Fuel Tank 230.Fuel Tank 230 can be protected by removably descend framework 143 coverings in the bottom of the Fuel Tank 230 that will extend to the below of downtake 114,114.

After Fuel Tank 230 being inserted below vehicle frame 110 and be installed in the spatial portion Sp1, will descend framework 143 to be installed on the vehicle frame 110.

Fig. 7 is the block diagram around the Fuel Tank of the present invention.Being the two-wheeled Fuel Tank block diagram on every side that has carried the chassis structure of small size motorcycle of the present invention, also is the two-wheeled Fuel Tank block diagram on every side that has adopted the high-tension coil arrangement of small size motorcycle of the present invention.

Fuel Tank 230 be the latter half before making casing lower part 231 and back the first half the casing first half 232 coincidences and combine flange portion 233 and incorporate container.On bevelled, have oil filling port 234, ventilation odd-side 235 and fuel feed pump 236 on the 230a.Specifically, sequentially disposing ventilation odd-side 235, oil filling port 234 and fuel feed pump 236 on the top of Fuel Tank 230 in the past.

Flange 233 central portion at an upper portion thereof has a mounting hole 233a, has two mounting hole 233b (only represented left in the figure) about its underpart.Oil filling port 234 has hermetic type lid 237.Ventilation with odd-side 235 is and the Fuel Tank 230 interior small containers that are communicated with.

Like this, owing on oil filling port 234, have hermetic type lid 237, therefore, ventilation odd-side 235 is set on Fuel Tank 230.And, the ratio oil filling port in the upper surface 230a of Fuel Tank 230 more upper promptly basically topmost be provided with ventilation with odd-side 235, can ventilate with odd-side 235 and atmosphere by this ventilation.Its result can refuel the height of oil filling port 234 to Fuel Tank 230.Can increase the delivery volume that rises and brought by refueling altitude to Fuel Tank 230.

Feature of the present invention is, to be used to prevent that cleading from the heat affecting of driving engine 211, radiator 221, recurrent canal 222 and feed pipe 223 (with reference to Fig. 6) is divided into four members by symbol 241,242,243,243 expressions, these cleadings of cutting apart 241,242,243,243 will be configured on front, back, the left side and the right side of Fuel Tank 230.

Owing to be the cleading of cutting apart 241,242,243,243, can consider they to be become arbitrarily and minimal size from the degree of the heat affecting of driving engine 211 and radiator 221 and corresponding to the shape of each face of Fuel Tank 230.Each cleading 241,242,243,243 is smaller as a result for it, makes also as easy as rolling off a logly, and its forming metal mould also can be little, and materials used is few, therefore can make at an easy rate.

The anterior cleading 241 of fwd that covers Fuel Tank 230 is to see the resin film-making of in the form of a substantially rectangular hard resin etc. from the front.Owing to be the anterior cleading 241 that constitutes by the resin film-making, so its pole of figure is simple, can make more at an easy rate.

The rear portion cleading 242 that covers the back of Fuel Tank 230 is rubber film-makings of essentially rectangular, and two are drawn hanging hole 242a, 242a about having at an upper portion thereof, have one in its underpart and draw hanging hole 242b.

The left and right sides cleading the 243, the 243rd of the lower part on the left side of covering Fuel Tank 230 and the lower part on the right side has two sheet rubbers that draw hanging hole 243a, 243a at an upper portion thereof.Left and right sides cleading 243,243 is provided between Fuel Tank 230 and recurrent canal 222 and the feed pipe 223 (with reference to Fig. 6).Like this, do not make the heat transferred Fuel Tank 230 of recurrent canal 222 and feed pipe 223.

Like this, because rear portion cleading 242 and left and right sides cleading the 243, the 243rd, therefore the rubber film-making can freely be out of shape, and can carry out accordingly freely disposing with the space around the Fuel Tank 230.And, by effectively utilizing Fuel Tank 230 narrow space on every side, can be configured simply.In addition, owing to be rear portion cleading 242 and the left and right sides cleading 243,243 that constitutes by sheet, so its pole of figure is simple, can make more at an easy rate.

At this, turn back to Fig. 6 again and proceed explanation.From the beginning anterior cleading 241 is configured in manages between 111 downtakes that hang down downwards 114 and the Fuel Tank 230, releasably is installed on the front cross rail 151, becomes the member of the wind-guiding member of double as radiator 221 thus.Therefore, the upper end of anterior cleading 241 is to the upper side bending of radiator 221, and the lower end of anterior cleading 241 extends under the radiator 221.

Like this, because anterior cleading 241 is configured between downtake 114 and the Fuel Tank 230, therefore anterior cleading 241 can be installed on the downtake 230 simply.Therefore, the installation exercise of anterior cleading 241 is good.

Rear portion cleading 242 is hung its top to fix on and is taken the lead on the pin 144, its underpart is hung to fix on the hook 148 simultaneously, can releasably be installed on the vehicle frame 110 thus.

In addition, left and right sides cleading 243,243 (only having represented left in the figure) is taken the lead pin 144 by its top being hung fix on ... on, can releasably be installed on the vehicle frame 110.

From above explanation as can be known, owing to be the cleading of cutting apart 241,242,243,243, after Fuel Tank 230 being installed on the vehicle frame 110 (car body), can freely each cleading 241,242,243,243 be installed on the vehicle frame 110, its installation exercise is good.

As mentioned above, because the Fuel Tank 230 of superimposed structure about being, overlapping part can not contact with upper framework 113,113, downtake 114,114 and decline framework 143.Therefore, can more effectively utilize spatial portion Sp1, its result can further increase the capacity of Fuel Tank 230.

The figure shows with before noseplate 93 radiator covers 221, with the structure that covers down under 94 radiator covers 221 and the Fuel Tank 230.

Noseplate 93 extends to down the front end of cover 94, has a plurality of radiatores air guide hole 93a simultaneously in its front ...

Cover 94 down for the air draft with radiator 221 is discharged to the outside, below fan 224, have exhaust outlet 94a.Exhaust outlet 94a has the many current plate 94b after tiltedly ...

In addition, representing to have the maintenance of opening during with cover 330 and ignition spark plug (not shown) on the car cover 20 with cover 360 among this figure at maintenance driving engine 221 in the oiling of opening during to Fuel Tank 230 fuelings by oil filling port 234.

Fig. 8 be Fig. 68 to view, be illustrated in the structure that Fuel Tank 230 is installed on the vehicle frame 110.

Vehicle frame 110 about strut bar 152,152 structure of an essay upper bracket 154, lower tray 155,155 is installed on left and right sides downtake 114,114.The top of the flange 233 of Fuel Tank 230 on upper bracket 154 by screw retention, the bottom that the flange 233 of Fuel Tank 230 by screw retention simultaneously on lower tray 115,115 thus, can releasably be installed in Fuel Tank 230 on the vehicle frame 110.In addition, the top of flange 233 be tightly by screw retention on upper bracket 154.

Fig. 9 is the 9-9 line section-drawing of Fig. 8, by bolt and nut 157 bottom of flange 233 is installed by rubber cradle 156 on lower tray 115, is installed by rubber thus.The 158th, the collar.

Figure 10 is two-wheeled elevation cross-sectional view, representing (1) with vehicle frame 110 and Fuel Tank 230 by central cover 24 and left and right sides pedal 25,25 and pedal skirt section, the left and right sides 26,26 and cover 94 situations about covering down, and (2) are supported pole 141,141 by pedal base plate 25,25 are installed in situation on the left and right sides downtake 114,114 by screw.

As mentioned above, hang to fix on and take the lead pin 144 ... on left and right sides cleading 243,243 hang down along the side of Fuel Tank 230, extend by the side and the gap between the downtake 114,114 of Fuel Tank 230.Like this, fix on the vehicle frame 110 because a top with left and right sides cleading 243,243 hangs, so it installs simple.

The top of left and right sides cleading 243,243 is installed on the outside of upper framework 113,113, and its underpart is provided in the inboard of downtake 114,114 or recurrent canal 222, feed pipe 223.Therefore can not make recurrent canal 222, feed pipe 223 heats feed through to Fuel Tank 230.

Figure 11 is the action diagram around the radiator of the present invention, is in the place ahead attraction wind of the fan 224 at radiator 221 rears from radiator 221.Therefore outer pneumatolytic is cooling air (wind that travels when garage is walked) Fc, enters radiator air guide hole 93a ..., flow through cooling air passway and enter radiator 221.

Hot gas (air draft hot gas) Fh that has passed through radiator 221 discharges from fan 224, changes flow direction downwards by anterior cleading 241 guidings of double as wind-guiding guide member, flows out to the outside from covering 94 exhaust outlet 94a down.

Since change by anterior cleading 241 the gas Fh that passed through radiator 221 towards, can prevent that therefore hot gas Fh is to the driving engine 211 at the rear that is in radiator 221 or the influence of Fuel Tank 230.In addition, owing to anterior cleading 241 double as wind-guiding guide members, therefore do not need to be provided with in addition other wind-guiding guide member.

Figure 12 is the mode chart of Fuel Tank of the present invention, particularly adopted the mode chart of two-wheeled Fuel Tank of the high-tension coil arrangement of motor scooter of the present invention, it also is the mode chart of two-wheeled Fuel Tank that has carried the chassis structure of small size motorcycle of the present invention, Fuel Tank 230 has round oil filling port 234 dish 251 on every side, the end 252a that fuel is discharged with flexible pipe (drainage tube) 252 is connected with this dish 251, and the fuel discharge uses the other end 252b of flexible pipe 252 to atmosphere opening.

As mentioned above, ventilation is being communicated with in odd-side 235 and the Fuel Tank 230.Ventilation is with connecting the end 253a of ventilation with flexible pipe 252 on the odd-side 235, ventilation branches into two strands of shapes with the other end of flexible pipe 253.

Like this, because the fuel discharge is become cheap flexible pipe with pipe arrangement spare and ventilation with pipe arrangement spare, can realize that the cost of Fuel Tank 230 reduces.The 254th, make the T font joint of ventilation with the other end branch of flexible pipe 253.

Figure 13 is the oil filling port back pseudosection on every side of Fuel Tank of the present invention, and dish 251 is forming the 251b of tube portion of up/down perforation on smooth end 251a, is that fuel is accepted with dish.By the 251a of tube portion is enclosed within on the oil filling port 234, the top 230a of the end 24b of the recess 24a that is provided with in the oiling partly by central cover 24 and Fuel Tank 230 adds the upper and lower surface of end 251a simultaneously, can subpanel 251.Therefore, do not need the member of the bolt etc. of subpanel 251 usefulness, its installation is also easy.24c is the oil filling port through hole.

Figure 14 is the right side External view of vehicle frame of the present invention and Fuel Tank, and dish 251 has the discharge orifice 251c that extends down towards the back.On this discharge orifice 251c, connecting fuel and discharging an end 252a, this fuel is being discharged hang down along upper right framework 113, and extending to down and cover 94 rear portion right end portion with this flexible pipe 252 with flexible pipe 252, with other end 252b towards the below.

In Fuel Tank 230 gas filed processes, receive unrestrained fuel around oil filling port 234 by dish 251, can discharge by fuel and be discharged to the outside with flexible pipe 252.Therefore, do not worry get wet the outside face of Fuel Tank of the unrestrained fuel of oil.

In addition, ventilation has the vent 235a that extends to the right with odd-side 235, is connecting the end 253a of ventilation with flexible pipe 253 on this vent 235a, and this ventilation is hung down to the back lower place with the right flank of flexible pipe 253 along Fuel Tank 230.

Promptly when Fuel Tank 230 is seen in the front, ventilation is branched into two strand shapes by extending to down between upper framework 113 and the downtake 114 after covering 94 rear portion right end portion along Fuel Tank 230 with flexible pipe 253.

One side's of branch other end 253b extends to down the rear portion left end portion of cover 94 and to atmosphere opening, the opposing party's of branch the other end 253 extends upward along the back of Fuel Tank 230, rearward extends along upper left framework 113, to atmosphere opening again.Therefore, even when the side in two other end 253b, 253c has stopped up, also can guarantee ventilatory function by remaining other end.

In addition, in the embodiment of the invention described above, in Fig. 6, high-tension coil 226 can be configured on the position of relative overall width central authorities and recurrent canal 222 opposition sides, for example when recurrent canal 222 edges are passed through more on the right side than overall width central authorities, as long as keep left the side configuration.

In addition, on the front at least of Fuel Tank 230 and back, can dispose the cleading of cutting apart.

Like this, can make ventilation with flexible pipe 253 by between left and right sides upper framework 113,113 and the left and right sides downtake 114,114, ventilation is extended to than the left side of Fuel Tank 230 or right side side more with at least a portion of flexible pipe 253.

Comprehensive above explanation, 1. be provided with ventilation odd-side 235 on the top of Fuel Tank 230,2. connecting the end 253a of ventilation on odd-side 235 in this ventilation with flexible pipe 253,3. extend to than the right flank of Fuel Tank 230 behind righter (or more left) side with flexible pipe 253 will ventilating than left surface, 4. extend to side in contrast, other end 253b, the 253c that 5. will ventilate with flexible pipe 253 are configured in than the left surface of Fuel Tank 230 more left (or righter than right flank) just.

Owing to so constitute, when forming the posture of leaning to one side to the left or to the right with two-wheeled 10, ventilation is positioned at more upper than Fuel Tank 230 with at least a portion of flexible pipe 253.Therefore, the interior fuel of not worrying the Fuel Tank 230 of leaning to one side flows out to outside by ventilating with flexible pipe 253 with odd-side 235 from ventilation.

And, because the other end that will ventilate with flexible pipe 253 branches into two strands of shapes, even so the side among two other end 253b, the 253c when having stopped up, also can ventilate with remaining the opposing party.Its result can more positively guarantee to ventilate and use in the odd-side 253 and the aeration between the atmosphere.

In addition, by between the left side of Fuel Tank 230 or the right side and upper framework 113 or downtake 114 by ventilation with flexible pipe 253, can be by upper framework 113 or downtake 114 protection ventilations with flexible pipes 253.

By Fuel Tank 230 is inserted from the below of vehicle frame 110 and is installed in the spatial portion Sp1, can by about upper framework 113,113 and about downtake 114,114 protection Fuel Tanks 230.

Figure 15 is the two-wheeled oiling block diagram that covers that has carried the chassis structure of small size motorcycle of the present invention, the hinge of vehicle open/close formula cover structure is to form the food tray portion 331 that adds as recess or opening in car cover 20 sides, this add in the food tray portion 331 by a pair of hinge 333,334 (with reference to Figure 16) but freely openable ground is installed with as the oiling of open and close type cover constructs with the hinge that covers 330.In addition, vehicle body cover 20 and oiling are plastic members with cover 330.

Add food tray portion 331, on inner cover 23, cut away and be equivalent to refuel 234 part and form and add food tray front portion 335 as the part of vehicle body cover 20, the part that excision is equivalent to oil filling port 234 on as the central cover 24 of the part of vehicle body cover 20 forms and adds food tray rear portion 336, and this adds food tray portion 331 makes these add food tray portion 335 and add the involutory and part that forms in food tray rear portion 336 from front and back.In addition, add food tray rear portion 336 and have through hole 339a, the 339b that passes through for a pair of arm 337,338.

Refuel with cover 330 front ends, on inner cover 23, be installed with and be used to the cover opener 342 of locking/unblanking, extend pair of right and left arm 337,338 from the rear end of cover body 341 at its cover body 341.The 343rd, be used for the fastening portion that fastening is formed on the cover opener 342 on the inner cover 23.

Figure 16 is the two-wheeled oiling back view that covers that is carrying the chassis structure of small size motorcycle of the present invention.

One side's hinge 333 is made of inner gear 344, gear 346, rib group 349, tight fixed bolt 351,351, this inner gear 344 forms around the rotating shaft C 1 of side's arm 337, this gear 346 be as with the gear of the rotary type damper 35 of these inner gear 344 ingear energy dispersers, rib group 349 is used to support the housing 347 of this rotary type damper 345 and is formed on the central cover 24, and this holding screw 351,351 is used for the housing 347 of rotary type damper 345 is fixed on this rib group 349.

Rotary type damper 345 is that gear 346 is installed in rotation on the housing 347, filling oil (not shown) in housing 347, make the sticking member of rotating band of gear 346, by the inner gear 344 of gear 346 with a side's of tank cover 330 arm 337 meshed, make the rotative speed decay of fuel door 330, become rotation slowly.One side's arm 337 is to have by rib group 349 to be bearing in the axle of using on the back side of inner gear 344 348.

The opposing party's hinge 334 is by axial region 352, torsion spring 353, hinge bearing 354, bolt 352a, tight fixed bolt 355 ... constitute.This axial region 352 forms around the S. A. C1 of the opposing party's arm 338, this torsion spring 353 is the spring members that are bearing on this axial region 352, taking in the brace panel of this axial region 352 and torsion spring 353, torsion spring 353 in this hinge bearing 354 together, this bolt 352a is used for axial region 352 is fixed on this hinge bearing 354 with rotating freely, and this tight fixed bolt 355 is used for hinge bearing 354 is fixed on central cover 24.In addition, 355a ... be in order to be screwed into 355 ... and be formed on the protrusion of central cover 24 sides.

Torsion spring 353 hangs over its other end on the hinge bearing 354 by the one end is hung on the right arm 338, becomes to opening direction to refueling the spring that applies elastic force with cover 330.

Figure 17 is the exploded perspective view of two-wheeled hinge structure that has carried the car body frame construction of small size motorcycle of the present invention.

Rib group 349 is made of first rib 356, second rib 357, the 3rd rib 358, strengthening rib 359,359, this first rib 356 has protrusion 356a, the 356a that is used to be screwed into tight fixed bolt 351,351, this second rib 357 has the half slot 357a of the cover 347 that is used to accept rotary type damper 345, and the 3rd rib 358 has U word groove 358a in order to support the extended axle 348 from the back side of inner gear 344.This strengthening rib 359,359 is used to strengthen the 3rd rib 358a.

Vehicle open/close formula cover arrangement, the damper employing rotatably is installed in gear 346 the rotator type energy disperser 345 that forms on the cover 347, around the rotating shaft C 1 of a side arm 337, forming inner gear 344, on this inner gear 344, directly meshing gear 346, will cover 347 and be fixed on (with reference to Figure 15) on the car cover 20.

By around the rotating shaft C 1 of side's arm 347, forming inner gear 344, on this inner gear 344, directly meshing the gear 346 of rotator type energy disperser 345, to cover 347 and be fixed on the car cover 20, and make rotator type energy disperser 345 have supporting and refuel with the rotating part function of covering 330.Refuel with the rotating part function of covering 330 by making rotator type energy disperser 345 have supporting, can realize the simplification of oiling with the hinge structure of cover 330 (vehicle open/close formula covers).

That is, the cost that refuels with cover 330 can be reduced, and the assembling man-hour of refueling can be reduced with cover 330.

In addition, vehicle open/close formula cover arrangement owing to the hinge 334 that will support the opposing party's arm 338 by hinge bearing 345 (brace panel) is bearing on the central cover 23 (car cover 20), can improve the rigidity of hinge 334.

Figure 18 is the two-wheeled oiling side cutaway view that covers that has carried the chassis structure of small size motorcycle of the present invention.

In vehicle open/close formula cover arrangement, on the plastic car cover 20 that covers vehicle frame 110 (with reference to Fig. 3), be provided with the food tray portion 331 that adds (recess or opening), seal this with the oiling of synthetic resin with cover 330 (open and close type covers) and add food tray portion 331, this the time hinge structure in, extend a pair of arm 337 from refueling with cover 330,338 (fronts 337 with reference to Figure 17), by hinge 333,334 (333 of fronts, with reference to Figure 17) with these arms 337,338 are rotatably installed in car cover 20 sides, on the hinge 334 of supporting one side's arm 338, setting up simultaneously and will cover 330, on the hinge 333 of supporting the opposing party arm 337, setting up the rotator type energy disperser 345 (with reference to Figure 17) of the rotative speed decay that makes cover 333 to opening the torsion spring 353 (spring member) that direction applies elastic force.

Figure 19 (a) and (b) are the two-wheeled oiling of the adopting Action Specification figure that cover that carry the chassis structure of small size motorcycle of the present invention.

In (a), draw cover opener 342 the arrow a by resembling with finger, cover opener 342 is thrown off from center plate 23.

In (b), by breaking away from the finger shown in (a), refuel with cover 330 beginnings rotation lentamente, open into full open position of coupler with oneself strength.

Figure 20 is to use the instruction diagram of using the rope installation constitution in the carrying of the car body frame construction of small size motorcycle of the present invention.

161 is objective tables among the figure, 162, the 162 lanyard rope portions that are mounted on the objective table, 163, the 163rd, the carrying rope, carrying is that carrying hook 136,136 is installed on the rear lower after cross member of vehicle frame 110 with the rope installation constitution, these carrying hooks 136,136 along rear mudguard 268, are covered it with rear mudguard 268 the earth simultaneously.Therefore, carrying can be not in sight at the state of walking with hook 136,136, therefore can realize the raising of the outward appearance of two-wheeled 10 (with reference to Fig. 1).In addition,, can set carrying with hook 136,136 by the earth, can not damage rear mudguard 268 owing to cover carrying with hook 136,136 with rear mudguard 268 the earth.Promptly can easily carrying be hung on the vehicle frame 110 with rope 163,163.

Figure 21 is to use in the lateral plan of the main support installation constitution of the car body frame construction of small size motorcycle of the present invention.

In the drawings, the 217th, the crank case of driving engine 221,218L, 218R be mounted on the crank case 217 about installation bracket, 219 ... be be used for about installation bracket 218L, 218R be installed in bolt on the crank case 217, main support 320 by the rack body 321 that forms a shape, be installed in left and right sides hinge pole 322L, 322R on this rack body 321, constitute across tension member 333L, 333R between this left and right sides hinge pole 322L, 322R and rack body 321, the hanging feet portion 334 that is installed in the left side of rack body 321 respectively.335, the 335th, the pivot on installation bracket 218L, the 218R about 320 of main supports are bearing in, the 336, the 336th, the ground plane about rack body 321.

Figure 22 is to use in the lateral plan of the main support of the chassis structure of small size motorcycle of the present invention, promptly, the main support installation constitution be with left and right sides hinge pole 322L, 322R freely swing ground axle suspension about installation bracket 218L, 218R on structure, installation bracket 218L, 218R about this are installed on the crank case 217.

Since with left and right sides hinge pole 322L, 322R freely swing ground axle suspension about installation bracket 218L, 218R on structure, installation bracket 218L, 218R about this is installed on the crank case 217, can shorten ground plane 336,336 distances to pivot from main support.For example can save the crossbeam of frame on hinge pole 322L, 322R, can reduce the cost of main support 320.

Figure 23 is to use the sectional side view around the maintenance cover of the chassis structure of small size motorcycle of the present invention, maintenance cover 360 is made of cover body 361, preceding fastening portion 362, back fastening portion 363, escape hole 364, should preceding fastening portion 362 hang on the central cover 24 by being formed on to draw on this cover body 361, this back fastening portion 363 hangs on the vehicle seat hinge support 131b by being formed on to draw on the cover body 361, and this escape hole 364 makes the heat from driving engine rearward run by being formed on the cover body 361.

In large-scale small size motorcycle,, therefore need carefully to consider the heat radiation countermeasure because the heating of driving engine 211 is also big.

Therefore, by forming the escape hole 364 that hot-fluid is concentrated on the maintenance cover 360 of driving engine 211 being used to overhaul, the hot Q1 that will produce from driving engine 211 ... the 208d at the bottom of the vehicle seat that leads shown in arrow Q2 utilizes the wind direction rear of travelling to run.Therefore, can prevent that driving engine 211 hot gas cage on every side is in car cover 21.

In addition, when maintenance driving engine 211, can unload maintenance cover 360 and overhaul.

Figure 24 is the exploded perspective view of vehicle seat bottom thermal insulation construction that expression is used in the chassis structure of small size motorcycle of the present invention, and so-called vehicle seat bottom thermal insulation construction refers in order to cut off from the heating of driving engine 221 and releasably to be installed in the arrangement of vehicle seat lower disc 171 on the top of driving engine 211 in order to take in instrument (not shown).172 are formed in the holding tools portion on the vehicle seat lower disc 171.

Figure 25 is the block diagram of vehicle seat lower disc mounting position that expression is used in the chassis structure of small size motorcycle of the present invention.

For example if by cutting off heating in covering engine 211 (with reference to Figure 24) top integratedly from driving engine 211 by article case etc., then the upkeep operation around the driving engine 211 becomes difficult, in addition, when from the heating of driving engine 211 special-purpose cleading being set, can cause number of parts to increase in order to cut off.

Therefore, by in the top of driving engine 211 configuration vehicle seat lower disc 171, cut off heating from driving engine.And on vehicle seat lower disc 171, form holding tools portion 172, make it can take in instrument (not shown).In addition, by vehicle seat lower disc 171 being installed in with freely loading and unloading car cover 20 sides of the top and vehicle seat 208 bottoms of driving engine 211, can be by the operation of decreasing the upkeep operation around driving engine 211.

That is, by making vehicle seat lower disc 171 have heat insulating function and take in function, and car cover 20 sides can be installed in with freely loading and unloading, the operation raising of multifunction and upkeep operation can be realized.

In addition, shown in Figure 4, in an embodiment, setting up middle beam 132 and 133 3 crossbeams of rear portion crossbeam on front cross rail 131, the back framework 115,115, but be not limited thereto, the radical of the crossbeam of frame on the framework of back is arbitrarily.

The present invention produces following effect by its above-mentioned structure.

The small size motorcycle of first technical scheme of the present invention, wherein, from the beginning pipe is to the back lower place pair of right and left upper framework that hangs down, below this a pair of upper framework, from the beginning manage the pair of right and left downtake that hangs down downwards, the lower end of these downtakes is rearward extended and combine with the bottom of a pair of upper framework, thus, can constitute the side-looking that is surrounded by a pair of upper framework and a pair of downtake is the spatial portion of fundamental triangle, improved the rigidity of vehicle frame, but because spatial portion is the front portion front end of kicking up in side-looking pointed, so this part is narrow.

Therefore, in order to maximally utilise the narrow space segment of this fore-upper part, Fuel Tank is formed the pointed casing of kicking up along upper framework and downtake front portion, be configured in this spatial portion, can increase propellant capacity thus.In addition since about a pair of upper framework of configuration, extend in the space between this upper framework by top Fuel Tank, can increase tankage.In addition, owing to, come the increase capacity, also can protect Fuel Tank even Fuel Tank extends to the below of downtake by removably descending framework to cover the bottom of Fuel Tank.Like this, can maximally utilise limited space, increase propellant capacity.

In addition, owing to be the kick up Fuel Tank of general triangular shape of front end tapered of front portion, so its center of gravity is in downside, by carrying such low center of gravity Fuel Tank, can reduce two-wheeled center of gravity.

The small size motorcycle of second technical scheme of the present invention is located at than the more upper place of oil filling port with hermetic type lid with odd-side by ventilating in Fuel Tank, can refuel the height of oil filling port to Fuel Tank.Because refueling altitude rises, and can increase the volume read-out to Fuel Tank.

The small size motorcycle of the 3rd technical scheme of the present invention, because being connected ventilation, an end branches into two strands of shapes, even also can ventilate when the side in two other ends has stopped up with remaining the opposing party with the other end of the breather hose on the odd-side.Its result can further certain aeration in guaranteeing odd-side and between the atmosphere.

The small size motorcycle of the 4th technical scheme of the present invention, owing to will be used to prevent cut apart and be configured in the front and back at least of Fuel Tank from the cleading of the heat affecting of driving engine or radiator, therefore, can consider from the degree of the heat affecting of driving engine or Fuel Tank simultaneously, with the shape of each face of Fuel Tank at random and be set at minimal size compatibly.Its result can make each cleading more small-sized, can make each cleading easy as can simultaneously.And the forming metal mold of each cleading is little, material is few owing to be used to make, and therefore can make each cleading at an easy rate.In addition, owing to be the cleading of cutting apart, after being installed in Fuel Tank on the car body, can be mounted freely on the car body, its installation exercise is good.

The small size motorcycle of the 5th technical scheme of the present invention, owing to the cleading on the front that is configured in Fuel Tank is the resin film-making, so its pole of figure is simple, can make more at an easy rate.In addition, because cleading is configured between downtake and the Fuel Tank, can simply cleading be installed on the downtake.Therefore, the installation exercise of cleading is good.In addition, because the cleading double as is the wind-guiding guide member, therefore do not need to be provided with different wind-guiding guide member in addition, number of parts tails off.

The small size motorcycle of the 6th technical scheme of the present invention, because being configured in the back or the cleading on the left side and the right side of Fuel Tank is the rubber film-making, therefore can freely be out of shape, can freely be configured with the space around the Fuel Tank, as long as the top of sheet is installed on the vehicle frame with matching.In addition, owing to be the cleading that is made of sheet, its pole of figure is simple, can make more at an easy rate.

The small size motorcycle of the 7th technical scheme of the present invention, it is small size motorcycle with low-floor type pedal, at the rear portion of pedal configuration driving engine, anterior bottom configuration engine ignition coil at pedal, therefore, can make engine ignition use coil, make it not be subjected to the heat affecting of driving engine away from driving engine.Its result can prolong the life-span of driving engine with high-tension coil.

In addition, by at the anterior bottom of base plate configuration driving engine high-tension coil, can realize effective utilization in space of the below of low-floor type pedal.

The small size motorcycle of the 8th technical scheme of the present invention, at the place ahead of pedal configuration engine cooling radiator, use coil with the place ahead configuration driving engine of radiator with lighting a fire at this engine cooling, therefore can make it not be subjected to heat affecting from the air draft of radiator, the heat heat radiation that driving engine is produced with high-tension coil self.

The small size motorcycle of the 9th technical scheme of the present invention, use heat sink arrangements in pedal the place ahead engine cooling, with recurrent canal that cooling water expansion tank is returned with radiator to engine cooling from this driving engine along more keep left side or pass through on the right side than overall width central authorities, in the position configuration of relative overall width central authorities and recurrent canal opposition side the driving engine high-tension coil, so can make driving engine not be subjected to heat affecting from recurrent canal with high-tension coil.

The small size motorcycle of the tenth technical scheme of the present invention, owing to above driving engine, releasably setting up crossbeam after the pair of right and left between framework, therefore by for example can easily changing crossbeam by the bolt tightening.Can adjust the rigidity of vehicle frame.

In addition, owing to above driving engine, releasably setting up crossbeam after the pair of right and left between framework, therefore can easily carry out driving engine maintenance on every side by unloading cross sill.

The small size motorcycle of the 11 technical scheme of the present invention, because framework is the member of lengthwise shape of cross section after the pair of right and left, therefore the rigidity longitudinally of supporting saddle and posterior bumper can be guaranteed to be used for fully, the increase of horizontal rigidity can be suppressed simultaneously.Its result has guaranteed light comfortable property by bus simultaneously at the weight-saving of realizing vehicle.

The small size motorcycle of the 12 technical scheme of the present invention, when vehicle seat is the vehicle seat of open and close type, because making the member double as of the vehicle seat hinge of supporting open and close type vehicle seat is crossbeam, can realize the reduction of the number of parts of constituent part, can reduce the cost of vehicle frame.In addition, owing to can unload the vehicle seat hinge, can carry out the shape change of vehicle seat hinge or the maintenance around the driving engine more easily from vehicle frame.

Claims (12)

1. small size motorcycle, it is characterized in that, from the beginning pipe is to the back lower place pair of right and left upper framework that hangs down, below this a pair of upper framework, from the beginning manage the pair of right and left downtake that hangs down downwards, the lower end of these downtakes is rearward extended and combine with the bottom of above-mentioned a pair of upper framework, thus, the side-looking that formation is surrounded by a pair of upper framework and a pair of downtake is the spatial portion of fundamental triangle, in this space along the Fuel Tank of the anterior front end tapered of kicking up of upper framework and downtake configuration, the bottom of this Fuel Tank is bloated, simultaneously with covering the bottom of this Fuel Tank with the framework that removably descends that is positioned at the downtake below.

2. small size motorcycle as claimed in claim 1, it is characterized in that, above-mentioned Fuel Tank has the lid of hermetic type at oil filling port, being provided with simultaneously ventilation uses odd-side, an end to be connected this ventilation to pass between above-mentioned upper framework and the above-mentioned downtake along Fuel Tank with flexible pipe with the ventilation on the odd-side on top.

3. small size motorcycle as claimed in claim 2 is characterized in that, above-mentioned ventilation branches into two strands of shapes with the other end of flexible pipe.

4. as any one the described small size motorcycle in the claim 1～3, it is characterized in that, it is small size motorcycle with low-floor type pedal, at the anterior configuration of pedal radiator, at the rear portion of pedal configuration driving engine, between above-mentioned radiator and driving engine, dispose Fuel Tank, the cleading that configuration is cut apart on the front and back at least of this Fuel Tank.

5. small size motorcycle as claimed in claim 4 is characterized in that, the above-mentioned cleading that is configured on the Fuel Tank front is the resinite sheet of double as radiator wind-guiding guide member, is configured between the downtake and above-mentioned Fuel Tank that from the beginning pipe hangs down.

6. small size motorcycle as claimed in claim 4 is characterized in that, the back or the cleading on the left side and the right side that are configured in Fuel Tank are the rubber film-makings, and its top is installed on the vehicle frame.

7. as any one the described small size motorcycle in the claim 1～3, it is characterized in that, this vehicle is the small size motorcycle with low-floor type pedal, at the rear portion of above-mentioned pedal configuration driving engine, at the anterior bottom configuration driving engine high-tension coil of above-mentioned pedal.

8. small size motorcycle as claimed in claim 7 is characterized in that, at above-mentioned pedal the place ahead configuration engine cooling radiator, and configuration engine ignition coil before this engine cooling is with radiator.

9. small size motorcycle as claimed in claim 7, it is characterized in that, at above-mentioned pedal the place ahead configuration engine cooling radiator, lead to the engine cooling radiator from this driving engine, the recurrent canal that returns cooling water expansion tank is more keeping left side or pass through on the right side than width over sides of car body central authorities, the position configuration driving engine high-tension coil in overall width central authorities relatively with the recurrent canal opposition side.

10. as any one the described small size motorcycle in the claim 1～3, it is characterized in that, rearward extend framework after the pair of right and left from the rear portion of the preceding framework that links to each other with the head pipe, by these back supporting framework vehicle seat and posterior bumper, the rear of framework and below the framework of above-mentioned a pair of back, dispose driving engine before above-mentioned, above driving engine, after the pair of right and left between framework releasably crossbearer crossbeam.

11. small size motorcycle as claimed in claim 10 is characterized in that, above-mentioned pair of right and left after-frame is the member of lengthwise shape of cross section.

12. small size motorcycle as claimed in claim 10 is characterized in that, above-mentioned vehicle seat is the vehicle seat of open and close type, and the vehicle seat hinge double as of supporting open and close type vehicle seat is above-mentioned crossbeam.

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