CN1361037A - Motor bicycle with pedal - Google Patents

Abstract

A motorcycle with footplates comprises a crankshaft with at least a pair of crank weights and a rotatable pedal shaft that are removably supported by an engine case of the engine. Therein, an engine body (33) comprising an engine case (35) is rigidly fixed to a body frame. A balancing device (54) comprises a balance weight (54a) disposed between two crank weights (45a) and partially overlapping the crank weights (45a) when viewed from a direction parallel to an axis of the crankshaft (45) and is received in the engine case (35). The balancing device is made rotatable on an axis parallel to the crankshaft (45) in synchronization with rotation of the crankshaft (45). The object of the present invention is to reduce vibration of a body frame that results from vibration of an engine, to ensure rigidity when pedals are pressed, and to miniaturize the engine.

Description

Be with the two-wheeled of pedal

Technical field

The present invention relates to a kind of two-wheeled with pedal.In particular, the present invention relates to a kind of like this two-wheeled with pedal, this band pedal two-wheeled has pedal shaft and driving engine, this pedal shaft can be delivered to trailing wheel with the legpower of importing from the pedal of being located at two ends, this driving engine has can be around the axis revolution parallel with this pedal shaft to be delivered to rotary motive power on the bent axle of above-mentioned trailing wheel, engine case at this driving engine supports the above-mentioned bent axle with at least one pair of crank weight, but and the above-mentioned pedal shaft of free rotaring ground supporting.

Background technology

Past, this band pedal two-wheeled open by for example Japanese kokai publication hei 8-108875 communique etc., the engine case that has at driving engine is supporting crankshaft and pedal shaft similarly, makes two-wheeled small-sized, lightweight.

In above-mentioned band pedal two-wheeled, by the rubber installation component engine body is installed on vehicle frame generally speaking, make the vibration of driving engine be difficult for being delivered to vehicle frame, yet, owing between the driving engine of supporting pedal axle and vehicle frame, elastomeric material is set, so be difficult to when the driver treadles, guarantee the rigidity sense.

The present invention makes in view of such situation, its purpose is to provide a kind of two-wheeled with pedal, this band pedal two-wheeled alleviates the vibration of the vehicle frame that the vibration by driving engine causes, and can constitute driving engine compactly in the rigidity sense when guaranteeing to treadle.

Summary of the invention

In order to achieve the above object, the band pedal of a first aspect of the present invention two-wheeled has pedal shaft and driving engine, this pedal shaft can be delivered to trailing wheel with the legpower of importing from the crank pedal of being located at two ends, this driving engine has can be around the axis revolution parallel with this pedal shaft to be delivered to rotary motive power on the bent axle of above-mentioned trailing wheel, have the above-mentioned bent axle of at least one pair of crank weight in the supporting of the engine case of this driving engine, but and the above-mentioned pedal shaft of free rotaring ground supporting; It is characterized in that: the engine body that comprises above-mentioned engine case is fixed in vehicle frame rigidly, have when a watching part with the direction of the parallel axes of above-mentioned bent axle be disposed at the balancing device of the counterbalanced weight between above-mentioned crank weight with coinciding with above-mentioned two crank weights can be with the revolution of bent axle linkedly around the axis revolution parallel with bent axle, and be housed in the above-mentioned engine case.

According to such formation, can suppress the vibration of driving engine by balancing device, so,, also can reduce the vibration that causes by engine vibration of vehicle frame even engine body is fixed in vehicle frame rigidly, in addition, by the rigidly fix installation of engine body at vehicle frame, the rigidity sense in the time of can guaranteeing to step the pedal at the pedal shaft two ends that are supported on the engine case that engine body has, and, owing to no longer need vibration absorbing structure, so can make the supporting construction densification of engine body at vehicle frame.And, because the counterbalanced weight of balancing device is configured between a pair of crank weight, and a part coincides with above-mentioned two crank weights when watching with the direction of the parallel axes of bent axle, so, even have balancing device, also can be less with getting at width setup along the engine case on the direction of the axis of crank, prevent the maximization of driving engine.

In addition, the band pedal of a second aspect of the present invention two-wheeled on the basis of above-mentioned first aspect, also have such feature: dispose a pair of above-mentioned balancing device in the both sides of above-mentioned bent axle when the axis direction of the cylinder-bore that has from above-mentioned engine body is watched, this a pair of above-mentioned balancing device has rotation axis on the extended line of a diameter of above-mentioned bent axle.Constitute according to this, can between a pair of crank weight, dispose a pair of balancing device that can suppress compactly around the torque of bent axle.

The band pedal of a third aspect of the present invention two-wheeled the above-mentioned the 1st or the basis of second aspect on, also have such feature: above-mentioned pedal shaft is supported on above-mentioned engine case by ball bearing of main shaft, and above-mentioned bent axle and balancing device are bearing in the support that is installed on engine case by bearing respectively.According to this formation, by by with engine case in addition all-in-one-piece bracket supports bent axle and balancing device, can make the balancing device mass concentrationization, and can easily improve the rigidity of support, and improve the vibration-isolating effect of balancing device, further suppress to the engine case transmitting vibrations, thereby can further suppress transfer of vibration to vehicle frame and pedal shaft, in addition, by guaranteeing rigidity, can realize the lightweight of engine case by support.

The band pedal of a fourth aspect of the present invention two-wheeled on the basis aspect the above-mentioned the 2nd also has such feature: the position that the axis that above-mentioned bent axle and pedal shaft are configured in above-mentioned cylinder-bore side by side intersects obliquely with respect to the straight line of the axis that is connected these bent axles.Constitute according to this,, realize the miniaturization of engine case with doing one's utmost even, also can make bent axle and pedal shaft approaching disposing a pair of above-mentioned balancing device in the both sides of bent axle when the axis direction of cylinder-bore is watched.

Description of drawings

Fig. 1 is the two-wheeled vertical disconnected lateral plan of the band pedal of the 1st embodiment.

Fig. 2 is the cross sectional drawing along the driving engine of the 2-2 line of Fig. 1.

Fig. 3 is the 3-3 line cross sectional drawing of Fig. 2.

Fig. 4 is the 4-4 line cross sectional drawing of Fig. 3.

Fig. 5 is the 5-5 line amplification profile diagram of Fig. 1.

Fig. 6 is for amplifying the skiagraph of the part that vehicle frame is shown.

Fig. 7 is the 7-7 line cross sectional drawing of Fig. 6.

Fig. 8 is the 8-8 line cross sectional drawing of Fig. 6.

Fig. 9 is the 9-9 line cross sectional drawing of Fig. 6.

Figure 10 is the 10-10 line cross sectional drawing of Fig. 6.

Figure 11 is the two-wheeled lateral plan of the band pedal of the 2nd embodiment of the present invention.

Figure 12 is that vertical disconnected lateral plan amplifies in the portion that wants of Figure 11.

Figure 13 is the 13-13 line cross sectional drawing of Figure 12.

Figure 14 be Figure 13 want portion's enlarged drawing.

Figure 15 is the 15-15 line cross sectional drawing of Figure 14.

The specific embodiment

Below with reference to the accompanying drawings shown in embodiments of the invention form of implementation of the present invention is described.

Fig. 1-Figure 10 illustrates the 1st embodiment of the present invention, Fig. 1 is the two-wheeled vertical disconnected lateral plan of band pedal, Fig. 2 is the cross sectional drawing along the driving engine of the 2-2 line of Fig. 1, and Fig. 3 is the 3-3 line cross sectional drawing of Fig. 2, and Fig. 4 is the 4-4 line cross sectional drawing of Fig. 3, Fig. 5 is the 5-5 line amplification profile diagram of Fig. 1, Fig. 6 is for amplifying the skiagraph of the part that vehicle frame is shown, and Fig. 7 is the 7-7 line cross sectional drawing of Fig. 6, and Fig. 8 is the 8-8 line cross sectional drawing of Fig. 6, Fig. 9 is the 9-9 line cross sectional drawing of Fig. 6, and Figure 10 is the 10-10 line cross sectional drawing of Fig. 6.

At first, as shown in Figure 1, the two-wheeled vehicle frame 21 of band pedal has main truss 23, vehicle seat column 24, reaches pair of right and left stern framing 25 ... this main truss 23 is provided with head pipe 22 and tilts towards the back lower place at front end, this vehicle seat column 24 extends setting, this pair of right and left stern framing 25 from the rear portion of main truss 23 towards the top ... upper bond upper end at vehicle seat column 24.

Can turn to twelve Earthly Branches brought forward fork 26 at head pipe 22, the following end bearing front-wheel WF at this front fork 26 is provided with shaft-like turning to 27 in the upper end of front fork 26.

Vehicle seat column 24 from above insert support tube 29, this support tube 29 is provided with the vehicle seat 28 that the driver takes the saddle of usefulness in the upper end, these support tube 29 scalable upper-lower position ground are fixed in vehicle seat column 24.

At pair of right and left stern framing 25 ... the bottom countershaft prop up trailing wheel WR, driver on the vehicle seat 28 steps pair of right and left crank pedal 30 ... and the legpower that produces can be delivered to this trailing wheel WR, in addition, the output that is equipped on the driving engine 31 of vehicle frame 21 also can be delivered to trailing wheel WR.Accommodate case 32, above-mentioned a pair of stern framing 25 what the upper support of vehicle seat column 24 was disposed at these vehicle seat column 24 rear sides ... accommodating case 32 ground from the rear side covering is configured.Accommodate the control setup etc. that storage battery and being used to is controlled driving engine 31 accommodating case 32.

Can find out with reference to Fig. 2-Fig. 4 in the lump, driving engine 31 is 4 two-stroke engines of valve-on-the-side formula, and the engine body 33 of this driving engine 31 is by cylinder block 34, with the engine case 35 of the lower bond of cylinder block 34, constitute with the cylinder head 36 of the upper bond of cylinder block 34.

Cylinder block 34 one have the 34a of cylinder portion of cylinder-bore of being provided with 37, engine body 33 is fixedly installed in vehicle frame 21 rigidly, and between vehicle seat column 24 and trailing wheel WR, make be disposed at vehicle seat column 24 rear sides the above-mentioned cylinder 34a of portion towards the back upper place obliquely along vehicle seat column 24.

Engine case 35 by the 1st case member 38, the 2nd case member 39, the 3rd case member 40, and the 4th case member 41 constitute, the 1st and the 2nd case member 38,39 forming crank chamber 42 each other and be bonded with each other, the 3rd case member 40 and the 2nd case member 39 connect be incorporated in and the 1st and the 2nd case member 38,39 between form the operating room 43 that is disposed at above-mentioned crank chamber 42 foreign sides, the 4th the case member 41 is engaged in the 3rd case member 40, and operating room 43 is open towards trailing wheel WR side.

The 1st and the division plane of the 2nd case member 38,39 be set on the plane of the axis C that comprises cylinder-bore 37, the 1st is clipped in the part of the 34a of cylinder portion each other with the 2nd case member 38,39 and is connected with cylinder block 34.

Accommodate the major part that has along the bent axle 45 of the axis of two-wheeled Width in crank chamber 42, the piston 46 that can be embedded in cylinder-bore 37 is connected in bent axle 45 by connecting rod 47 with being free to slide.This bent axle 45 has a pair of crank weight 45a, 45a, but bent axle 45 is by support 50 free rotaring ground supportings, this support 50 is by constituting at a pair of holding plate 48,49 that clips two crank weight 45a, 45a each other, be contained in crank chamber 42, and be connected with the 2nd case member 38,39 with the 1st of engine case 35.

48,49 of two holding plates a plurality of spacers cylindraceous 51 are set ..., lead in these spacers 51 by inserting ... rivet 52 ... connect two holding plates 48,49, thereby constitute support 50.This support 50 is connected respectively to the 1st and the 2nd case member 38,39 of engine case 35, and is connected to the 34a of cylinder portion of cylinder block 34.

Two holding plates 48,49 at support 50 are pressed into the outer ring that pair of bearings is a ball bearing of main shaft 53,53 coaxially, but bent axle 45 passes through these ball bearing of main shaft 53,53 free rotaring ground supportings in support 50.

When the direction of the axis C of cylinder-bore 37 is watched, be configured in a pair of balancing device 54,54 that has rotation axis on the diameter line of bent axle 45 and be contained in crank chamber 42 in the both sides of above-mentioned bent axle 45, counterbalanced weight 54a, the 54a that these balancing devicees 54,54 have respectively a part when the direction of the axis that is parallel to bent axle 45 is watched coincide with above-mentioned bent axle 45 two crank weight 45a, be configured between two crank weight 45a, 45a 45a.

But two balancing devicees 54,54 by double-type 2 groups of bearings be ball bearing of main shaft 55,55,55,55 by support 50 free rotaring ground supportings, each ball bearing of main shaft 55 ... the outer ring be pressed into two holding plates 48,49 of support 50.

Between the holding plate 48 of support 50 and bent axle 45 1 sides' crank weight 45a, driven wheel 56 is fixedly arranged on bent axle 45, set firmly respectively and driven wheel 56 ingear driven gears 57,57 at balancing device 54,54.Therefore, along with the revolution of bent axle 45, two balancing devicees 54,54 turn round in the opposite direction around the axis parallel with bent axle 45.

Along the front side of the above-mentioned bent axle 45 on vehicle frame 21 fore-and-aft directions configuration pedal shaft 58 and make its axis parallel with above-mentioned bent axle 45, this pedal shaft 58 has axis vehicle seat column 24 that vehicle frame 21 has on the extended line of lower side.But this pedal shaft 58 is ball bearing of main shaft 59,60 free rotaring ground supportings the 1st and the 4th case members 38,41 in engine case 35 by bearing.And at the two ends of pedal shaft 58 crank pedal 30 is set respectively in foreign side's side of engine case 35 ...

In operating room 43, accommodate the electrical generator 63 that constitutes by rotor 61 and stator 62, this rotor 61 can be supported by this pedal shaft 58 pivotally relatively pivotally around the axis identical with pedal shaft 58, and this stator 62 is supported regularly by the 1st case member 38 of these rotor 61 mulched grounds by engine case 35.

Protrude into the bent axle 45 of operating room 43 at the 2nd case member 39 that can connect engine case 35 freely to rotate, drive pulley 64 can not be installed relatively pivotally, at the driven pulley 65 of the rotor 61 that is fixedly installed in above-mentioned electrical generator 63 and the belt 66 of above-mentioned drive pulley 64 volume link shapes.Therefore, drive rotor 61 revolutions of electrical generator 63 corresponding to the revolution of bent axle 45.

In the lump as can be known with reference to Fig. 5, the rotary motive power of bent axle 45 is delivered to trailing wheel WR by the torque transfer 69 that comprises belt type continuously variable transmission 70 and planetary gear type reduction gear 71, and this torque transfer 69 is disposed at the left side at the vertical face of the axis C that comprises the cylinder-bore 37 that driving engine 31 has under the state of two-wheeled working direction relatively.

Belt type continuously variable transmission 70 has drive pulley 73, driven pulley 74, reaches endless-belt 75, this drive pulley 73 has centrifugal weights 72, and can in operating room 43, be located at bent axle 45 by the effect change effective radius ground of this centrifugal weights 72, this driven pulley 74 can change corresponding to the effective radius of this drive pulley 73 and change effective radius, and these endless-belt 75 volumes hang over drive pulley 73 and driven pulley 74.

At the left side of the trailing wheel WR under the state of two-wheeled working direction configuration transmission gearbox 77, this transmission gearbox 77 is accommodated starting clutch 76 and the above-mentioned planetary gear type reduction gear 71 that is made of driven pulley 74 and centrifugal clutch, the 3rd case member 40 of the engine case 35 of driving engine 31 extends out to rear side from driving engine 31, be connected with in above-mentioned transmission gearbox 77, transmission gearbox 77 is by pair of right and left stern framing 25 ... in side's fixed bearing.

But the axletree 78 of trailing wheel WR is one distolateral by above-mentioned transmission gearbox 77 free rotaring ground supportings, driven pulley 74 can be installed on axletree 78 relatively freely to rotate, and above-mentioned starting clutch 76 and planetary gear type reduction gear 71 are set between driven pulley 74 and axletree 78.

In such belt type continuously variable transmission 70, increase the effect of corresponding centrifugal weights 72 by rotating speed with bent axle 45, the effective radius of drive pulley 73 is increased, corresponding therewith, the effective radius of driven pulley 74 reduces, thereby make converter speed ratio from downside towards the stepless variation of highest side, after further slowing down by planetary gear type reduction gear 71 by the propulsive effort of the driving engine 31 of these belt type continuously variable transmission 70 speed changes, be delivered to axletree 78.

On the right side of the trailing wheel WR under the state of two-wheeled working direction, the backboard 80 of drum brake mechanism 79 is by pair of right and left stern framing 25 ... the opposing party's fixed bearing ground configuration, but the opposing party's side of axletree 78 is by these backboard 80 free rotaring ground supportings.

Foreign side at above-mentioned backboard 80 is fixedly installed in axletree 78 with driven sprocket 81.In addition, will be fixedly installed in pedal shaft 58 with above-mentioned driven sprocket 81 cooresponding drive sprockets 82, at the chain 83 of drive sprocket 82 and driven sprocket 81 volume link shapes on the right side of engine case 35.Therefore, when stepping crank pedal 30 ... pedal shaft 58 is turned round when operation, be delivered to the axletree 78 of trailing wheel WR with the cooresponding rotary motive power of this legpower.

Especially as can be known with reference to Fig. 2 and Fig. 3, between cylinder block 34 and cylinder head 36 as the driving engine 31 of 4 two-stroke engines of valve-on-the-side formula, form combustion chamber 85 facing to the part at piston 46 tops, and under the state of two-wheeled working direction with center configuration to from the axis C of cylinder-bore 37 towards out-of-position position, right side.In addition, at cylinder head 36 light-up plug 86 that the inner is reached combustion chamber 85 is installed.

The 34a of cylinder portion at cylinder block 34 is provided with the induction opening 87 that can lead to above-mentioned combustion chamber 85 towards main truss 23 sides ground, and can be towards the deflation hole 88 of above-mentioned combustion chamber 85 towards the setting of trailing wheel WR side, induction opening 87 and deflation hole 88 are on vertical the right side that is configured in the axis that comprises cylinder-bore 37 under the state of two-wheeled working direction.

The connected sum that inlet valve 89 switching induction openings 87 and combustion chamber are 85 cuts off, the connected sum that exhaust valve 90 switching deflation holes 88 and combustion chamber are 85 cuts off, inlet valve 89 and exhaust valve 90 are supported on cylinder block 34 in cylinder-bore 37 sides towards combustion chamber 85 with can carrying out on-off action, and are applied elastic force towards closing direction.

That is, be used for torque transfer 69 that rotary motive power with bent axle 45 is delivered to trailing wheel WR and inlet valve 89, exhaust valve 90 separate configuration about vertical of the axis C that comprises cylinder-bore 37.

Above-mentioned inlet valve 89 and exhaust valve 90 are by valve system 91 driven opening, this valve system 91 has timing driven wheel 92, timing driven gear 94, cam 95, air inlet side rocking arm 96, and exhaust side rocking arm 97, this timing driven wheel 92 is fixed in bent axle 45, but this timing driven gear 94 meshes by fulcrum 93 free rotaring ground supportings of the holding plate 48 that is fixed in support 50 and with above-mentioned timing driven wheel 92, this cam 95 is integrally formed at timing driven gear 94, this air inlet side rocking arm 96 is followed this cam 95 and joltily is supported on cylinder block 34 and is connected linkedly with above-mentioned inlet valve 89, and exhaust side rocking arm 97 is followed above-mentioned cam 95 and joltily is supported on cylinder block 34 and is connected in above-mentioned exhaust valve 90 linkedly.

It is to be delivered to timing driven gear 94 and cam 95 after 1/2 that above-mentioned timing driven wheel 92 slows down the rotary motive power of bent axle 45.That is, cam 95 decelerations are turned round for 1/2 ground of the speed of revolutions of bent axle 45.

At the 34a of cylinder portion of cylinder block 34, can lead to the downstream end of induction opening 87 ground connection towards the air inlet pipe 98 of the fore-and-aft direction extension of vehicle frame 21, the upstream extremity of this air inlet pipe 98 is connected to the downstream end of the carburettor 99 at the rear portion in the main truss 23 that is contained in vehicle frame 21.

In the lump as can be known with reference to Fig. 6-Figure 10, the main truss 23 of vehicle frame 21 by the side barrel-contoured the 1st framework component the 101, the 2nd framework component 102, and the 3rd framework component 103 constitute, form hollow shape, the transverse shape of the 1st framework component 101 is roughly quadrangle, the 2nd framework component 102 is connected to the front end of the 1st framework component 101 and manages 22 at the integrally formed head of front end with the rear end, its section form is U word shape substantially, and the 3rd framework component 103 has vehicle seat column 24 integratedly and is connected to the rear end of the 1st framework component 101.That is, the front portion of main truss 23 court open terrain up and down becomes, and the pars intermedia of main truss 23 becomes towards the front and back open terrain, and the rear portion of main truss 23 becomes with the below open terrain towards the rear.

In addition, promptly the 2nd framework component 102 of head pipe 22 is by covering by engaging the cover 104 that a pair of cover halfbody constitutes in the front portion that has main truss 23 integratedly, and the outside of this cover 104 links to each other with the outside of the 1st framework component 101 and makes surperficial concordant.

The inner face along total length at barrel-contoured the 1st framework component 101 in side is wholely set a plurality of (for example 4) protuberance 105,105 ... at these protuberances 105,105 ... front end by bolt 106,106 ... the rear end that connects the 2nd framework component 102 is at each protuberance 105,105 ... the rear end by bolt 107,107 ... the front end that connects the 3rd framework component 103.

Fuel Tank 108 is accommodated in front portion in main truss 23, and fuel filling tube 108a that this Fuel Tank 108 has connects the peristome 109 of being located at cover 104 tops and protrudes into the top, the mounting cover 110 dismantledly in the upper end of this fuel filling tube 108a.

In addition, in main truss 23 airfilter 111 is contained between Fuel Tank 108 and the carburettor 99, this airfilter 111 constitutes by accommodate filter core 113 in filter case 112.

At the rear portion of Fuel Tank 108 protuberance 115 that vibration proof rubber 114 is installed is set, be convexly equipped with in the front portion of filter case 112 can chimeric this vibration proof rubber 114 lug boss cylindraceous 116.In addition, a plurality of for example 2 flange part 112a, 112a are set the side with stretching out outwardly at the rear portion of filter case 112, these flange parts 112a, 112a are connected to the front portion of the 3rd framework component 103 by bolt 117,117.

In addition, above-below direction pars intermedia at Fuel Tank 108 rear portions connects fuel conductor 118, connect fuel conductor 119 at foot, these fuel conductors 118,119 extend to carburettor 99 sides by the gap that results between airfilter 111 and the main truss 23, and the other end of these fuel conductors 118,119 is connected to the cock of carburettor 99.This cock can the state that fuel is imported carburettor 99 from fuel conductor 118, from fuel conductor 119 fuel is imported carburettor 99 state, and not any from fuel conductor 118,119 state that fuel imports carburettor 99 is switched.

Filter core 113 is installed on peristome 120, and this peristome 120 is arranged at filter case 112 towards Fuel Tank 108 sides, and the breaker plate 121 of these filter cores 113 of square side bearing is fixed in filter case 112 in the filter case 112.

Importing to main truss 23 interior air from the gap between the fuel filling tube 108a that is formed at cover 104 peristome 109 and Fuel Tank 108 etc. is attracted in the filter case 112 by above-mentioned filter core 113 and purifies.The upstream extremity of connection pipe 122 is connected to the rear portion of filter case 112, and the downstream end of this connection pipe 122 is connected to the upstream extremity of carburettor 99.Therefore, the air that has been purified by airfilter 111 is fed to carburettor 99.

Referring again to Fig. 2, Fig. 3, and Fig. 5 can find out, can lead to deflation hole 88 ground from the upstream extremity of the freeing pipe 125 of driving engine 31 direct exhaust and be connected with cylinder block 34.This freeing pipe 125 between driving engine 31 and trailing wheel WR along this trailing wheel WR ground towards below extend, supporting the noise silencer 126 that is disposed at trailing wheel WR right side by the stern framing 25 of vehicle frame 21 and be connected with the downstream end of freeing pipe 125.

And, be used for rotary motive power with pedal shaft 58 be delivered to trailing wheel WR axletree 78 chain 83 and be used for rotary motive power with bent axle 45 and be delivered to belt 75 separate configuration of axletree 78 of trailing wheel WR to about the freeing pipe 125.

The following describes the effect of the 1st embodiment.The 34a of cylinder portion that bent axle 45 is supported on with being disposed at pedal shaft 58 rear sides the driving engine 31 of vehicle frame 21 disposes obliquely towards the back upper place between the vehicle seat column 24 of vehicle frame 21 and trailing wheel WR, the freeing pipe 125 of the waste gas of guiding driving engine 31 between driving engine 31 and trailing wheel WR along this trailing wheel WR towards below extend ground and dispose, and be connected to noise silencer 126, so, make freeing pipe 125 leave and be configured to position away from pedal shaft 58 from vehicle frame 21, and can easily guarantee the exhaust pipe range, improve the performance of driving engine 31.

And; be used for rotary motive power with bent axle 45 be delivered to trailing wheel WR axletree 78 endless-belt 75 and be used for rotary motive power with pedal shaft 58 and be delivered to chain 83 separate configuration of axletree 78 of trailing wheel WR to about the freeing pipe 125; freeing pipe 125 by driving engine 31, trailing wheel WR, endless-belt 75, and chain 83 surround before and after and about; do not need to be used to special protecting equipment that covers freeing pipe 125 etc., can reduce number of components.

In addition, the engine case 35 that has at driving engine 31 supports the bent axle 45 with a pair of crank weight 45a, 45a, but and free rotaring ground supporting pedal shaft 58, the engine body 33 that comprises engine case 35 is fixed in vehicle frame 21 rigidly, a pair of balancing device 54,54 is contained in the engine case 35, and can with the revolution of bent axle 45 linkedly around the parallel axis revolution of this bent axle 45.

Therefore, by suppress the vibration of driving engine 31 by balancing device 54,54, even engine body 33 is fixed in vehicle frame 21 rigidly, also can reduce the vibration of the vehicle frame 21 that causes by engine vibration, in addition, by engine body 33 is fixed to vehicle frame 21 rigidly, can guarantee to step the crank pedal 30 at pedal shaft 58 two ends of engine case 35 supportings that have by engine body 33 ... the time the rigidity sense, and, can make the supporting construction densification of engine body 33 at vehicle frame 21 owing to do not need vibration absorbing structure.

And, two balancing devicees 54,54 have counterbalanced weight 54a respectively, this counterbalanced weight 54a overlaps crank weight 45a, is disposed between two crank weight 45a, the 45a 45a in a part when the direction of the axis that is parallel to bent axle 45 is watched, so, even have balancing device 54,54, also the width setup of the engine case 35 on the direction of the axis of bent axle 45 can be got lessly, prevent the maximization of driving engine 31.

In addition, above-mentioned two balancing devicees 54,54 are disposed at the both sides of bent axle 45 when the direction of the axis C of the cylinder-bore 37 that has from engine body 33 is watched, and have rotation axis on a diameter line of this bent axle 45 prolongs, configuration compactly can suppress a pair of balancing device 54,54 around the torque of bent axle 45 between a pair of crank weight 45a, 45a.

In addition, pedal shaft 58 is supported on engine case 35 by ball bearing of main shaft 59,60, and bent axle 45 and balancing device 54,54 are bearing in the support 50 that is installed on engine case 35 by ball bearing of main shaft 53,53,55,55 respectively.Promptly, by by with engine case 35 all-in-one-piece support 50 supporting crankshafts 45 and balancing device 54,54 in addition, can make the balancing device mass concentrationization, and can easily improve the rigidity of support 50, and improve the vibration-isolating effect of balancing device 54,54, further suppress to engine case 35 transmitting vibrations, thereby can further suppress transfer of vibration to vehicle frame 21 and pedal shaft 58, in addition, by guaranteeing rigidity, can realize the lightweight of engine case 35 by support 50.

In addition, the axis of pedal shaft 58 is configured in vehicle seat column 24 as vehicle frame 21 parts on the imaginary extended line of lower side, the 34a of cylinder portion that bent axle 45 is supported on with being configured to these pedal shaft 58 rear sides the driving engine 31 of vehicle frame 21 disposes along this vehicle seat column 24 at the rear side of vehicle seat column 24, is contained in main truss 23 interior carburettors 99 are connected to driving engine 31 by the air inlet pipe 98 that extends towards vehicle frame 21 fore-and-aft directions top.

Therefore, can avoid the crank pedal 30 at pedal shaft 38 two ends ... the air inlet system and the exhaust system of revolution requisite space ground configuration driving engine 31, in main truss 23, constitute concentrating compactly partially of air inlet system and constitute driving engine 31, also can make two-wheeled all densifications.

And, driving engine 31 is valve-on-the-side formula 4 two-stroke engines, the 34a of cylinder portion at driving engine 31 is provided with induction opening 87 and deflation hole 88, air inlet pipe 98 and freeing pipe 125 can be connected to the 34a of cylinder portion, so, even, can obtain the ground height of driving engine 31 bottoms and the subsidiary engine configuration space of driving engine 31 tops for but 4 two-stroke engines of purifying exhaust air also can reduce the overall height of driving engine 31.

In addition, driving engine 31 is by with inlet valve 89 and exhaust valve 90 and be used for from bent axle 45 transmission of power being separated into to the torque transfer 69 of trailing wheel WR the configuration of vertical the left and right sides of the axis that comprises cylinder-bore 37, be supported on vehicle frame 21, so, can be at two crank pedals 30 ... between guarantee the cooling adiabatic space of the 34a of cylinder portion, simultaneously, can make driving engine 31 miniaturizations, further make two-wheeled all densifications.

The main truss 23 of vehicle frame 21 forms hollow shape and tilts towards the back lower place, in this main truss 23, accommodate Fuel Tank 108 and accommodate the carburettor 99 that is positioned at these Fuel Tank 108 rear sides, connect carburettor 99 by the air inlet pipe 98 that extends towards vehicle frame 21 fore-and-aft directions at the driving engine 31 that is disposed at main truss 23 rears.

Therefore, need be in the used space of adiabatic space that main truss 23 be guaranteed relative driving engine 31 on every side, the miniaturization that makes main truss 23 is that the miniaturization of vehicle body becomes possibility, makes the boarding of relative vehicle seat 28 easy, and, can in main truss 23, accommodate Fuel Tank 108 and carburettor 99 effectively.And, because main truss 23 tilts towards the back lower place, so the fuel conductor 118,119 that supplies fuel to carburettor 99 from Fuel Tank 108 can tilt naturally towards the rear, can be to carburettor 99 fueling successfully.

In addition, in main truss 23, accommodate the airfilter 111 that is disposed at carburettor 99 the place aheads, in main truss 23, accommodate the air inlet system of configuration driving engine 31 compactly.

Configuration can be with from crank pedal 30 below the rearward end of main truss 23 ... the legpower of input is delivered to the pedal shaft 58 of trailing wheel WR, so, at the crank pedal 30 of the bigger rotary space of needs ... around dispose driving engine 31 compactly air inlet system.

Figure 11-Figure 15 illustrates the 2nd embodiment of the present invention, Figure 11 is the two-wheeled lateral plan of band pedal, and Figure 12 is that vertical disconnected lateral plan amplifies in the portion that wants of Figure 11, and Figure 13 is the 13-13 line cross sectional drawing of Figure 12, Figure 14 be Figure 13 want portion's enlarged drawing, Figure 15 is the 15-15 line cross sectional drawing of Figure 14.

Below with reference to such Figure 11-Figure 15 the 2nd embodiment of the present invention is described, wherein, adopts identical reference marks, only illustrate detailed with the cooresponding part of above-mentioned the 1st embodiment.

At first, as shown in figure 11, the two-wheeled vehicle frame 141 of band pedal has main truss 143 and vehicle seat column 144, and this main truss 143 is provided with head pipe 142 and tilts towards the back lower place at front end, and this vehicle seat column 144 extends towards the top from the rear portion of main truss 143 and is provided with.

Can turn to twelve Earthly Branches brought forward fork 145 at head pipe 142, the following end bearing front-wheel WF at this front fork 145 is provided with shaft-like turning to 146 in the upper end of front fork 145.

Vehicle seat column 144 from above insert support tube 148, this support tube 148 is provided with the vehicle seat 147 that the driver takes the saddle of usefulness in the upper end, these support tube 148 scalable upper-lower position ground are fixed in vehicle seat column 144.

Driver on the vehicle seat 147 steps pair of right and left crank pedal 30 ... and the legpower that produces can be delivered to this trailing wheel WR, and in addition, the output that is equipped on the driving engine 151 of vehicle frame 141 also can be delivered to trailing wheel WR.

Can find out with reference to Figure 12-Figure 15 in the lump, driving engine 151 is 4 two-stroke engines of valve-on-the-side formula, and the engine body 153 of this driving engine 151 is by cylinder block 154, with the engine case 155 of the lower bond of cylinder block 154, constitute with the cylinder head 156 of the upper bond of cylinder block 154.

Cylinder block 154 one have the 154a of cylinder portion of cylinder-bore of being provided with 37, engine body 153 is fixedly installed in vehicle frame 141 rigidly, and, between vehicle seat column 144 and trailing wheel WR, make be disposed at vehicle seat column 144 rear sides the above-mentioned cylinder 154a of portion towards the back upper place obliquely along vehicle seat column 144.

Engine case 155 is supporting crankshaft 45 and in these bent axle 45 the place aheads axis is disposed at pedal shaft 58 on the vehicle seat column 144 lower side extended lines simultaneously, forms longways in that the fore-and-aft direction of vehicle frame 121 is long.And the front end of this engine case 155 is connected to vehicle frame 121.

Crank chamber 152 in being formed at engine case 155 is accommodated the major part of bent axle 45, and the piston 149 that can be embedded in cylinder-bore 37 is connected in bent axle 45 by connecting rod 150 with being free to slide.This bent axle 45 has a pair of crank weight 45a, 45a, but is passing through ball bearing of main shaft 53,53 free rotaring ground supporting bent axles 45 with engine case 155 bonded assembly supports 50.

When from when the direction of the axis C of cylinder-bore 37 is watched, be configured in a pair of balancing device 54,54 that has rotation axis on the diameter line of bent axle 45 and be contained in crank chamber 152 in the both sides of above-mentioned bent axle 45, but two balancing devicees 54,54 by ball bearing of main shaft 55,55,55,55 free rotaring ground supportings in support 50.

Counterbalanced weight 54a, 54a that above-mentioned two balancing devicees 54,54 have respectively are disposed between two crank weight 45a, the 45a, and at the two crank weight 45a, the 45a that a part are coincided with when the direction of the axis that is parallel to bent axle 45 is watched bent axle 45.

Pedal shaft 58 with axis be configured to vehicle seat column 144 on the extended line of lower side, but by ball bearing of main shaft 59,60 free rotaring ground supportings in engine case 155, in foreign side's side of engine case 155 respectively with crank pedal 30 ... be set to the two ends of pedal shaft 58.

And the axis C that bent axle 45 and pedal shaft 58 are configured in cylinder-bore 37 side by side is connected the heterotropic position of straight line L of the axis of these bent axles 45,58 relatively.

Set firmly driven wheel 56 at bent axle 45, set firmly respectively and driven wheel 56 ingear driven gears 57,57 at two balancing devicees 54,54.Therefore, two balancing devicees 54,54 are along with the revolution of bent axle 45 is turned round in the opposite direction around the axis parallel with bent axle 45 linkedly.

In the foreign side of crank chamber 152, electrical generator 63 ' rotor 61 ' be connected in coaxially bent axle 45.On the other hand, cooling fan 157 be can support relatively pivotally, the driven gear 158 of this cooling fan 157 and driven wheel 159 engagements that are arranged at above-mentioned rotor 61 ' periphery are fixed at pedal shaft 58.That is, the revolution with bent axle 45 makes cooling fan 157 revolutions linkedly.

Cooling fan 157 is housed in the fan case 160 of being located at engine case 155, and this fan case 160 forms the spiral fashion of open upper end for the revolution corresponding to cooling fan 157 sucks coolant air from engine case 155 tops.

In addition, the torque transfer 69 of the rotary motive power of bent axle 45 by comprising belt type continuously variable transmission 70 and reducing gear row 175 ' be delivered to trailing wheel WR, this torque transfer 69 ' be disposed at the left side at the vertical face of the axis C that under the state of two-wheeled working direction, comprises the cylinder-bore 37 that driving engine 151 has relatively.

The drive pulley 73 of belt type continuously variable transmission 70 is connected to and the driven wheel 159 of the revolution interlock of bent axle 45 and can the relative pedal shaft 58 that is supported on pivotally of freedom, changes driven pulley 74 and the drive pulley 73 volume link shape belts 75 that change effective radius at the effective radius corresponding to this drive pulley 73.

The configuration of the left side of trailing wheel WR accommodate driven pulley 74, starting clutch 76, and the transmission gearbox 77 of reducing gear row 175 ', this transmission gearbox 77 ' constitute by the rear portion of supporting member 161 and the rear portion of case member 162, but the left end of the axletree 78 of trailing wheel WR is by the rear portion free rotaring ground supporting of supporting member 161, this supporting member 161 is connected in front end above-mentioned engine case 155 rigidly and extends to the side of trailing wheel WR, and this case member 162 forms the left side outer wall of engine case 155 and covers the side that torque transfer 69 ' ground extends to trailing wheel WR from outer side.

Under the state of two-wheeled working direction, with the backboard 80 of drum brake mechanism 79 ' the be disposed at right side of trailing wheel WR.This backboard 80 ' front end is connected to above-mentioned engine case 155 rigidly is integrally formed in the rear portion of the supporting member 163 that extends to trailing wheel WR side, but the right part of the axletree 78 of trailing wheel WR is by the backboard 80 ' free rotaring ground supporting at supporting member 163 rear portions.

Above-mentioned backboard 80 ' foreign side, driven sprocket 81 is fixedly installed in axletree 78, at the chain 83 of the drive sprocket 82 that is fixedly installed in pedal shaft 58 and above-mentioned driven sprocket 81 volume link shapes.The case member 164 that forms the outer right wall of engine case 155 covers the side that described drive sprocket 82, chain 83 and driven sprocket 81 ground extend to trailing wheel WR, the rear portion of this case member 164 be connected to above-mentioned backboard 80 '.

Between cylinder block 154 and cylinder head 156, form combustion chamber 165 towards the ground, position configuration center that the place ahead lateral deviation is moved facing to piston 149 top parts at axis C from cylinder-bore 37 as the driving engine 151 of valve-on-the-side formula 4 two-stroke engines.In addition, at cylinder head 156 light-up plug 86 that the inner is reached combustion chamber 165 is installed.

Can lead to the induction opening (not shown) of above-mentioned combustion chamber 165 at cylinder block 154 towards the front side setting, and towards two-wheeled working direction the time, be positioned at the deflation hole that setting leftwards can be led to above-mentioned combustion chamber 165.Be used to switch the inlet valve that the connected sum of 165 of induction opening and combustion chambers cuts off and be used to switch the exhaust valve 167 that the connected sum of deflation hole and 165 of combustion chambers cuts off and be supported on cylinder block 154 with carrying out on-off action, and quilt court closes a direction and applied elastic force.

Above-mentioned inlet valve and exhaust valve 167 are by valve system 168 driven opening, this valve system 168 has timing driven wheel 169, timing driven gear 171, air inlet side and exhaust side cams 172,173, air inlet side rocking arm (not shown), and exhaust side rocking arm 174, this timing driven wheel 169 is fixed in two balancing devicees 54, side in 54, but this timing driven gear 171 is with above-mentioned timing driven wheel 169 engagements and by support 50 free rotaring ground supportings, this air inlet side and exhaust side cams 172,173 are integrally formed in timing driven gear 171, this air inlet side rocking arm can be followed air inlet side cam 172 and joltily is supported on above-mentioned support 50 and be connected in inlet valve linkedly, and this exhaust side rocking arm 174 can be followed exhaust side cams 173 and joltily is supported on above-mentioned support 50 and be connected in above-mentioned exhaust valve 167 linkedly.

In the downstream end that the front portion of the 154a of cylinder portion of cylinder block 154 can lead to above-mentioned induction opening ground connection air inlet pipe 178, the upstream extremity of this air inlet pipe 178 is connected with the downstream end of the carburettor 99 that is disposed at driving engine 151 tops.

The configuration of the rear side of above-mentioned carburettor 99 by vehicle seat column 144 supportings of vehicle frame 141 accommodate case 179, accommodate case 179 at this and accommodate Fuel Tank 180.And, injecting with covering 181 cooresponding parts, lid 182 to be opened/closed is arranged at above-mentioned top of accommodating case 179 with the fuel that is installed on Fuel Tank 180 dismantledly.

Above-mentionedly accommodate the filter case that case 179 is also used as airfilter 183, this airfilter 183 has pipe 184 and filter core 185, this pipe 184 is contained in below Fuel Tank 180 accommodates in the case 179, one end is sealed, simultaneously, the other end is connected in the upstream extremity of above-mentioned carburettor 99, and this filter core 185 is wound in pipe 184 periphery in accommodating case 179, wears opening 186 in the part of package filter core 185 in pipe 184.Promptly, be not formed at and accommodate in the case 179 in decontamination chamber 187 the part general except that Fuel Tank 180 and pipe 184, flowing into not outside accommodating case 179, the air of decontamination chamber 187 flow in the pipe 184 through filter core 185 and opening 186, thereby be cleaned, cleaned air passes imports to carburettor 99 from managing 184.

Be connected to the 154a of cylinder portion of cylinder block 154 from the upstream extremity of the freeing pipe 188 of driving engine 151 direct exhaust with can leading to deflation hole.This freeing pipe 188 between driving engine 151 and trailing wheel WR along this trailing wheel WR ground towards below extend, by supporting member 163 supportings that link to each other with engine case 155, in the downstream end of the noise silencer 189 connection freeing pipes 188 that are disposed at trailing wheel WR right side.

By like this between driving engine 151 and trailing wheel WR along this trailing wheel WR configuration freeing pipe 188, but with a pair of supporting member 161,163 that is connected in the axletree 78 of engine case 155 and free rotaring ground supporting trailing wheel WR be disposed at above-mentioned freeing pipe 188 about.

According to the 2nd embodiment, the 154a of cylinder portion that bent axle 45 is supported on with being disposed at pedal shaft 58 rear sides the driving engine 151 of vehicle frame 141 disposes obliquely towards the back upper place between the vehicle seat column 144 of vehicle frame 141 and trailing wheel WR, from the freeing pipe 188 of driving engine 151 direct exhaust between driving engine 151 and trailing wheel WR along this trailing wheel WR towards below extend the ground configuration, and be connected in noise silencer 189, so, freeing pipe 188 can be configured to and leave vehicle frame 141 and away from the position of pedal shaft 58, simultaneously can easily guarantee the exhaust pipe range, improve the performance of driving engine 151.

And; but a pair of supporting member 161,163 that is connected in the axletree 78 of engine case 155 and free rotaring ground supporting trailing wheel WR be disposed at freeing pipe 188 about; freeing pipe 188 by vehicle seat column 144, trailing wheel WR, and a pair of supporting member 161,163 surround before and after and about; do not need special-purpose fender guard etc., can reduce number of components.

In addition, since simultaneously supporting crankshaft 45 and pedal shaft 58, be connected in vehicle frame 141 towards the front end of the long above-mentioned engine case 155 that forms longways of fore-and-aft direction of vehicle frame 141, the front portion of above-mentioned two supporting members 161,163 is connected in the rear portion of engine case 155, so, but by the engine case 155 free rotaring ground supporting pedal shafts 58 of supporting crankshaft 45, simultaneously, engine case 155 also works as the part of the member of supporting wheels WR, so, can further reduce number of components.

In addition, the engine body 153 that comprises engine case 155 is fixed in vehicle frame 141 rigidly, a pair of balancing device 54,54 can with the revolution of bent axle 45 linkedly around the axis revolution parallel with this bent axle 45, and be contained in the engine case 155, so, can be by balancing device 54,54 suppress the vibration of driving engine 151, even engine body 153 is fixed in the vibration that is caused by engine vibration that vehicle frame 141 also can reduce vehicle frame 141 rigidly, in addition, can guarantee to step the crank pedal 30 at the two ends of the pedal shaft 58 that is supported on the engine case 155 that engine body 153 has by engine body 153 in the fixed installation of the rigidity of vehicle frame 141 ... the time the rigidity sense, and do not need vibration absorbing structure, can make the supporting construction densification of engine body 153 at vehicle frame 141.

And, counterbalanced weight 54a, the 54a that two balancing devicees 54,54 have is disposed between two crank weight 45a, the 45a, and coincide with crank weight 45a, 45a in a part when the direction of the axis that is parallel to bent axle 45 is watched, so, even have balancing device 54,54, also the width setup along the engine case 155 of the direction of the axis of bent axle 45 can be got lessly, prevent the maximization of driving engine 151.

In addition, above-mentioned two balancing devicees 54,54 are in the both sides that are disposed at bent axle 45 when the direction of the axis C of the cylinder-bore 37 that has along engine body 153 is watched, and have rotation axis on a diameter extended line of this bent axle 45, a pair of balancing device 54,54 can be disposed between a pair of crank weight 45a, the 45a compactly.

And, the axis C that bent axle 45 and pedal shaft 58 are configured in cylinder-bore 37 side by side is connected the position that the straight line L of the axis of these bent axles 45,58 tilts to intersect relatively, so, even disposing a pair of balancing device 54,54 when the axis direction of cylinder-bore 37 is watched in the both sides of bent axle 45, also can make bent axle 45 and pedal shaft 58 approaching with doing one's utmost, realize the miniaturization of engine case 155.

In addition, by with engine case 155 all-in-one-piece support 50 supporting crankshafts 45 and balancing device 54,54 in addition, so, can realize the centralization of balancing device quality, and can easily improve the rigidity of support 50, improve the vibration-isolating effect of balancing device 54,54, further suppress, thereby can further suppress transfer of vibration, in addition to vehicle frame 141 and pedal shaft 58 to engine case 155 transmitting vibrations, by guaranteeing rigidity, can realize the lightweight of engine case 155 by support 50.

In addition, the axis of pedal shaft 58 be configured in vehicle seat column 144 on the imaginary extended line of lower side, the 154a of cylinder portion of driving engine 151 that is supported on vehicle frame 141 on the rear side of this pedal shaft 58 configuration bent axle 45 ground at vehicle seat column 144 rear sides along 144 configurations of vehicle seat column.Therefore, can avoid the crank pedal 30 at the two ends of pedal shaft 58 ... the air inlet system and the exhaust system that dispose driving engine 151 pivotally.

Embodiments of the invention more than have been described, but have the invention is not restricted to the foregoing description, can under the prerequisite of the present invention that does not break away from claims record, carry out various design modifications.

As described above according to a first aspect of the present invention, can alleviate the vibration that the engine vibration by vehicle frame causes, the rigidity sense in the time of can guaranteeing to treadle, and can make the supporting construction densification of engine body at vehicle frame.And, the width setup of the engine case on the direction of the axis of bent axle can be got lessly, prevent the maximization of driving engine.

According to second aspect, can between a pair of crank weight, dispose a pair of balancing device that can suppress compactly around the torque of bent axle.

According to the third aspect, can improve the vibration-isolating effect of balancing device, further suppress transfer of vibration to engine case, further reduce transfer of vibration to vehicle frame and pedal shaft, in addition,, can realize the lightweight of engine case by guaranteeing rigidity by support.

In addition,, can make bent axle and pedal shaft approaching with doing one's utmost, realize the miniaturization of engine case according to fourth aspect.

Claims (4)

1. two-wheeled with pedal, have pedal shaft (58) and driving engine (31,151), this pedal shaft (58) can be delivered to trailing wheel (WR) with the legpower of importing from the crank pedal (30) of being located at two ends, this driving engine (31,151) having can be around the axis revolution parallel with this pedal shaft (58) to be delivered to rotary motive power on the bent axle (45) of above-mentioned trailing wheel (WR), at this driving engine (31,151) engine case (35,155) supporting has the above-mentioned bent axle (45) of at least one pair of crank weight (45a), but and the above-mentioned pedal shaft of free rotaring ground supporting (58); It is characterized in that: the engine body (33,153) that comprises above-mentioned engine case (35,155) is fixed in vehicle frame (21,141) rigidly, have when a watching part with the direction of the parallel axes of above-mentioned bent axle (45) coincide with the balancing device (54) that above-mentioned two crank weights are disposed at the counterbalanced weight (54a) between above-mentioned crank weight (45a) (45a) can be with the revolution of bent axle (45) linkedly around the axis revolution parallel with bent axle (45), and be housed in the above-mentioned engine case (35,155).

2. band pedal as claimed in claim 1 two-wheeled, it is characterized in that: dispose a pair of above-mentioned balancing device (54) in the both sides of above-mentioned bent axle (45) when the axis direction of the cylinder-bore (37) that has from above-mentioned engine body (33,153) is watched, this a pair of above-mentioned balancing device (54) has rotation axis on the extended line of a diameter of above-mentioned bent axle (45).

3. band pedal as claimed in claim 1 or 2 two-wheeled, it is characterized in that: above-mentioned pedal shaft (58) is supported on above-mentioned engine case (35,155) by ball bearing of main shaft (59,60), and above-mentioned bent axle (45) and balancing device (54) are bearing in the support (50) that is installed on engine case (35,155) by bearing (53,55) respectively.

4. band pedal as claimed in claim 2 two-wheeled is characterized in that: the position that the axis that above-mentioned bent axle (45) and pedal shaft (58) are configured in above-mentioned cylinder-bore (37) side by side intersects obliquely with respect to the straight line (L) of the axis that is connected described bent axle (45,58).

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