CN1043331C - Small vehickle with power apparatus of motor car - Google Patents

Abstract

The present invention provides a small vehicle that can smoothly guide the air cooled by the cooling fan directly connected to the crankshaft to the cylinder and the cylinder head, and at the same time can properly cool these parts, and the suspended power unit is compact mounted on the body. A pair of left and right suspension devices 7 positioned above the crankcase of the air-cooled internal combustion engine 3 are mounted on a bracket 9 protruding downward from the rear frame 8 of the scooter type motorcycle 1 via a connecting unit 10 so as to be swingable up and down. The upper half of the cold air passage 32 in the fan cover 18 forms a spiral shape in a direction deviated from the center of the crankshaft 22 as it extends from the rear to the front.

Description

The dilly of band motor scooter engine installation

The present invention relates to a kind of dilly, this the vehicle gas by the cooling fan cooling of direct connection on crank shaft can be led the smoothly cylinder and the cylinder head of combustion engine, simultaneously can suitably cool off these parts, and the suspension type engine installation is installed on the vehicle body compactly.

Japanese kokai publication hei 2-181017 discloses a kind of two-wheeled motorcycle, the engine installation of this two-wheeled motorcycle is made of combustion engine and variable-speed motor built-in drive motor with being integral, the cylinder of engine installation is towards the place ahead of vehicle body, and can be installed on the vehicle body on crank case top with swinging up and down.

At Fig. 1 of above-mentioned communique to embodiment shown in Figure 3, on the right flank (side opposite) of the cylinder cover of cylinder, offering the cold wind sucking hole with the left side that is disposing the air valve chain, on this sucking hole, set cooling cylinder head radiator, simultaneously, its inboard has disposed the axial flow cooling fan by crankshaft drives, utilization is cooled off with radiator while cooling cylinder by the cold wind cooling cylinder head that this tube axial fan sucks in the cylinder cowl, and utilization is flow through this cylinder head cooling and come the cooling cylinder head with cooling water expansion tank radiator and that be cooled.

In the embodiment of above-mentioned communique, because need be, and cooling fan be connected on the crank shaft, so complex structure is difficult to expendable weight with gear etc. with cooling fan and crank shaft pivot suspension abreast.

As above-mentioned improvement, shown in Figure 4 as above-mentioned communique adorned centrifugal cooling fan at the axle head of crank shaft, therefore, the diameter that surrounds the fan housting of centrifugal cooling fan must be bigger, thereupon, the pivotal bearing part of engine installation will be moved upward, and this just is difficult to be avoided the increase of plate height.

In addition, in the two-wheeled motorcycle of in above-mentioned communique, putting down in writing because than the more past top of cylinder cowl be provided with getter assembly, so the Fuel Tank of getter assembly top also must be arranged on higher position, just in this point, the height increase of plate is inevitable.

The purpose of this invention is to provide a kind of dilly, this dilly can direct into direct connection on the cylinder and cylinder head of combustion engine at the cooling air that the cooling fan on the crank shaft produces sleekly, and the suspension type engine installation is installed on the car body compactly.

In order to realize purpose of the present invention, the engine installation of suspension type engine installation dilly of the present invention is made of combustion engine and variable-speed motor built-in transmission device with being integral, and can be installed on the vehicle body with swinging up and down, cylinder is outstanding towards vehicle body the place ahead from this suspension type engine installation body, centrifugal cooling fan is installed on the axle head of crank shaft, it is characterized in that, stretch out upward from the outer peripheral face of internal combustion engine main body on the top that surrounds the periphery of this centrifugal fan and cold wind is guided into the fan housting of said cylinder and cylinder head, and the suspension apparatus of supporting the suspension type engine installation is to install like this; From the plane, it more is positioned near in the middle of the vehicle-body width direction than fan housting, sees that from the side its outer peripheral edges that are darted at this fan housting are in the scope on border.

Because the present invention has above-mentioned structure, so, mobile along the tangential direction of this fan by centrifugal fan from the cold wind that the fan housting peristome sucks, flow to cylinder and vapour head, this cold wind has cooled off cylinder and cylinder head.

In addition, among the present invention, because make fan housting top form fan housting upward from the outer peripheral face of internal combustion engine main body with stretching out, so, it is big that the diameter of this fan housting becomes, and also just can guide cold wind into cylinder and cylinder head efficiently, and cylinder and cylinder head can be cooled off fully.

Because support the suspension apparatus of suspension type engine installation, from the plane, more be positioned near in the middle of the vehicle-body width direction than fan housting, see that from the side the outer peripheral edges that are darted at this fan housting are in the scope on border, so, under the big state of the external diameter change that keeps this fan housting, can make above-mentioned suspension apparatus approach the center up and down of engine installation as far as possible, not only can reduce plate height, can also enlarge the space between combustion engine and the plate, increase the volume of container in this space or Fuel Tank etc.

The structure of putting down in writing according to claim 2 of the present invention, be not subjected under the state that influences from the fan housting that the internal combustion engine main body outer peripheral face stretches out upward, can take off the suspention pin with opening from the embedding of suspention pin and be inserted in the suspension apparatus with connecting, can maintain dilly at an easy rate, in addition, after above-mentioned suspention pin inserts, sell embedding and take off and use opening with covering to suspend in midair, with regard to salable said fan cover, guarantee that cold wind does not spill.

Structure according to claim 3 record of the present invention, because can make by the cooling air of cooling fan suction fan cover mobile like this: flow through along its two outside from cylinder and cylinder head upper space earlier, flow to cylinder and cylinder head lower space then, discharge from the below exhaust outlet again, so, the cooling performance of the getter assembly of cylinder top is better than the cooling performance of the gas deflation assembly of cylinder below, when can increase gettering efficiency, make above-mentioned getter assembly near cylinder, can further reduce bodywork height, increase the Fuel Tank of its top or the volume of container.

Fig. 1 is the left view of latter half of an embodiment of expression suspension type engine installation formula dilly of the present invention.

Fig. 2 is the latter half of right elevation of expression the foregoing description.

Fig. 3 is the birds-eye view of the foregoing description when unloading the hood-like attitude of under body.

Fig. 4 is the cross sectional drawing of the air-cooled internal combustion engine of the foregoing description.

Fig. 5 is that the main portion of Fig. 2 of no fan housting is amplified right elevation.

Fig. 6 is vertical front elevation that the VI-VI line along Fig. 2 is cut open.

Below, one embodiment of the present of invention are described with reference to the accompanying drawings.

Being loaded in minitype motorcycle type two-wheeled motorcycle 1 (can front vehicle wheel be one or two also, rear wheel is 2 three-wheel or a four-wheeled) on suspension type engine installation 2 mutually combine by air-cooled internal combustion engine 3 and V-belt formula stepless speed changing mechanism 4 and form, the cylinder band 14 of air-cooled internal combustion engine 3 and cylinder 5 be points upwards slightly from the place ahead, and vee-belt formula stepless speed changing mechanism 4 is to point to the rear from the left side of air-cooled internal combustion engine 3.Trailing wheel 6 is rabbeted integratedly on the output shaft 5 of vee-belt formula stepless speed changing mechanism 4.The pair of right and left suspension apparatus 7 that is positioned at the crank case top of air-cooled internal combustion engine 3 can be installed on carriage 9l, the 9r by coupling assembling 10 with swinging up and down, carriage 9l, 9r is outstanding downwards from the rear portion vehicle frame 8 of small motorcycle type motorbicycle 1, the rear portion of suspension type engine installation 2 is connected the rear portion of rear portion vehicle frame 8 by shock absorber 11 simultaneously, ground-surface rises and falls during corresponding to vehicle ', and suspension type engine installation 2 can swing up and down.

As shown in Figure 4, suspension type engine installation 2 can be divided into left crank case 12, right crank case 13, cylinder band 14, cylinder head 15, speed change hood 16 and right cover 17, left side crank case 12 is as the crank case of air-cooled internal combustion engine 3 and the transmission gearbox of vee-belt formula stepless speed changing mechanism 4, cylinder band 14 is connected on this left side crank case 12 and the right crank case 13 with being integral, cylinder head 15 is connected the top of this cylinder band 14, speed change hood 16 is the left sides that releasably are installed in left crank case 12, and right cover 17 is connected the right side of right crank case 13.The fan housting 18 that covers described centrifugal cooling fan 31 releasably is installed in the right side of right cover 17, simultaneously, cover and releasably be installed on left crank case 12 and the fan housting 18 simultaneously being divided on the protrusion 21 that 2 cylinder guard shield 19,20 up and down is entrenched in cylinder head 15 of cylinder band 14 and cylinder head 15.

In addition, the pivot left end that is supported in the crank shaft 22 on left crank case 12, the right crank case 13 is provided with the driving pulley 23 of vee-belt formula stepless speed changing mechanism 4 rotationally, and pivot is supported on the driven shaft 24 at left crank case 12 rear portions and is provided with driven pulley 25 by not shown centrifugal clutch, and vee-belt 26 is enclosed within on these driving pulleys 23 and the driven pulley 25.Rotating speed increase along with crank shaft 22, the converter speed ratio of vee-belt formula stepless speed changing mechanism 4 infinitely reduces, when reaching the regulation rotating speed, centrifugal clutch automatically engages, and the power of air-cooled internal combustion engine 3 passes to rear wheel 6 by vee-belt formula stepless speed changing mechanism 4.

In addition, formed a plurality of fins 27,28 every decide interval on the outer peripheral face of cylinder band 14 and cylinder head 15, the rotor 30 that is positioned at the electrical generator 29 of right cover 17 is embedded on the right-hand member of crank shaft 22 integratedly, in fan housting 18, centrifugal cooling fan 31 is installed on the rotor 30 integratedly simultaneously.

As shown in Figure 5, from the vehicle body right side, crank shaft 22 and centrifugal cooling fan 31 clockwise rotate, the first half of the cold air duct 32 in the fan housting 18 is along with extending to the front portion along clockwise direction from the rear portion through top, become scroll towards the center position that departs from crank shaft 22, also formed and the essentially identical space 34 of the shape of cold air duct 32 and in right side cover 17, utilize along the alternate next door 33 of scrollwork direction, as shown in Figure 5, the right upper portion of the fin 27 of cylinder band 14 is along with the scrollwork direction along cold air duct 32 is extended towards the place ahead, bend to earlier down square neck tiltedly after, the shape of directed downwards again.

In addition, concentric cylindric of 35 one-tenth in the suction opening portion of fan housting 18 and centrifugal cooling fan 31, radiator 36 is entrenched in this suction opening portion 35.

In addition, below the following right side that faces of cylinder guard shield 20 offered exhaust outlet 37, that suck and blow to by cylinder guard shield 19 from cold air duct 32 from the suction opening portion 35 of the fan housting 18 that is positioned at suspension type engine installation 2 right sides by centrifugal cooling fan 31, cold wind one side and fin 27 in 20 spaces that surround, 28 contacts, after carrying out interchange of heat with it on one side, discharge from the exhaust outlet 37 of below.

As shown in Figure 6, on scroll cold air duct 32 tops, on the left wall of right side cover 17, formed bolt hole 38, bolt hole 38 is positioned on the line of centres of left and right sides suspension apparatus 7, and on fan housting 18, also formed bolt hole 39, this bolt hole 39 is positioned on the extended line of the above-mentioned line of centres, and the rubber cradle 40 that plays the lid effect is entrenched on the bolt hole 39.

Secondly, the connecting device 10 of the carriage 9 of connection rear portion vehicle frame 8 and the suspension apparatus 7 of suspension type engine installation 2 is by sleeve pipe 43, connecting panel 44, crooked connection pipe 45, swing arm 46, yielding rubber 47, swing base portion 48 and buffering bearing shell 49 constitute, wherein, sleeve pipe 43 is overlapping the hanging bearing bolt 41 of 1 pair of suspension apparatus 7 about break-through, connecting panel 44 is fixed on this sleeve pipe 43 by its lower edge, crooked connection pipe 45 is fixed on the connecting panel 44 integratedly by sweep in the middle of it, swing arm 46 is fixed on the left end of crooked connection pipe 45 integratedly, yielding rubber 47 is positioned at the two ends of swing arm 46 and contacts with left end 91, swing base portion 48 is fixed on the right-hand member of crooked connection pipe 45 integratedly, and buffering bearing shell 49 is embedded in respectively on swing arm 46 and the swing base portion 48.Buffering bearing shell 49 and carriage 9l, 9r fuses, and the buffering bearing shell 52 that is embedded in integratedly simultaneously on the suspension apparatus 7 is fused by the hanging bearing bolt 41 of the buffering bearing shell 52 of this suspension apparatus 7 of break-through and sleeve pipe 43 and the sleeve pipe 43 that is screwed in nut 42 and coupling assembling 10 on the hanging bearing bolt 41.

In addition, set the getter assembly 53 of carburetter etc. above cylinder guard shield 19, this getter assembly 53 does not contact with the top curve 55 of the helmet box 54 of its top.

Disposed Fuel Tank 56 at the rear of helmet box 54.

Because the embodiment shown in the drawing constitutes in the above-described manner, so, during air-cooled internal combustion engine 3 operations, centrifugal cooling fan 31 is pressed Fig. 2 with crank shaft 22, clockwise direction shown in Figure 5 rotates, the cold wind that sucks from the suction opening portion 35 of the fan housting 18 on vehicle body right side in cold air duct 32 from the bottom through the rear portion and top be sent in the cylinder guard shield 19,20, contact with the fin 27,28 of cylinder band 14, cylinder head 15, from the exhaust outlet 37 of cylinder guard shield 20 to the right-hand discharge of vehicle body.Cold wind is by means of fin 27,28 cooling cylinder bodies 14 and cylinder head 15.

Cold air duct 32 is positioned at than more the keep right place of foreign side of the suspension apparatus 7 on right side, do not stretch out towards the top intrusively with suspension apparatus 7, because near the end of the cold air duct 32 the cylinder guard shield 19,20 is enough wide, so, the cold wind of big flow can be stablized and flow into smoothly in the cylinder guard shield 19,20, the resistance of passage is little, and cooling performance is higher.

In addition, because can be configured in 32 one-tenth of suspension apparatus 7 and the cold air ducts that stretches out upward the upper limb below of suspension type engine installation 2 irrelevantly, promptly near near the above-below direction line of centers, so, the bottom 52 of helmet box 54 can be arranged on the below does not influence the position of the crooked connection pipe 45 and the getter assembly 53 of coupling assembling 10 yet, like this, the volume of helmet box 54 can be increased, the height of plate 57 can also be reduced.

In addition, line of centers at right side cover 17 and the left and right sides, fan housting 18 upper edge suspension apparatus 7 has formed bolt hole 38,39, because rubber cradle 40 releasably is embedded on this bolt hole 39, so, rubber cradle 40 is taken off, just hanging bearing bolt 41 can be passed bolt hole 38,39 and the buffering bearing shell 52 of suspension apparatus 7 and the sleeve pipe 43 of coupling assembling 10, by nut being screwed on this hanging bearing bolt 41, just can be installed in the suspension apparatus 7 of suspension type engine installation 2 on the rear portion vehicle frame 8 by coupling assembling 10, therefore, can not unload bottom right cover 17 and fan housting 18 ground are connected to suspension apparatus 7 on the vehicle body of small motorcycle type motorbicycle 1, can maintain with comparalive ease.In addition, only rubber cradle 40 is embedded on the bolt hole 39, just can seals cold air duct 32 very simply.

And, the road surface counter-force that is applied to during small motorcycle type motorbicycle 1 travels on the trailing wheel 6 passes to the carriage 9 of rear portion vehicle frame 8 from shock absorber 11 and suspension apparatus 7 through coupling assembling 10, and this impact or vibration are fully absorbed by buffering bearing shell 52, yielding rubber 47 and the buffering bearing shell 49 of shock absorber 11, suspension apparatus 7.

Claims (2)

1. A small vehicle with a suspended power unit, this small vehicle includes a suspended power unit, the power unit is composed of an internal combustion engine and a transmission built in a transmission, and is installed on the vehicle body so that it can swing up and down, The cylinder and the cylinder head protrude from the suspended power unit body pointing to the front of the vehicle body, and a centrifugal cooling fan is installed on the shaft end of the crankshaft; The upper part of the fan cover and the cylinder head protrudes upwards from the outer peripheral surface of the internal combustion engine body; the suspension device supporting the suspended power unit is set in such a way that it is located closer to the middle of the vehicle body width direction than the fan cover in plan view. Viewed from the side, it is protruded within the range bounded by the outer peripheral edge of the fan cover. 2. The small vehicle with a suspended power unit according to claim 1, wherein an opening for engaging and disengaging a suspension bolt is formed on the outer surface of the cover, and the opening is located on the center line of the suspension device. , a cover part is fitted in and out of the opening for the suspension bolt.

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