CN1155625A

CN1155625A - Ignitor of IC engine

Info

Publication number: CN1155625A
Application number: CN 96114478
Authority: CN
Inventors: 大山隆; 平山周二; 中村健一郎
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1995-11-22
Filing date: 1996-11-15
Publication date: 1997-07-30
Anticipated expiration: 2016-11-15
Also published as: FR2741398B1; JP3518709B2; FR2741398A1; TW297081B; CN1075597C; JPH09144634A

Abstract

In a vehicle having a belt type continuously variable transmission and a starting mechanism, the starting mechanism for protruding a jumping gear 117 by the drive of a starter motor 110 to engage it with a gear 77a formed on the periphery of a belt driving pulley 77, and rotating a crank shaft 40 rotated integrally with the belt driving pulley 77 to start an internal combustion engine, a rubber fan 118 for cooling a belt type continuously variable transmission chamber is laid along the side surface opposite to a belt 75 of the belt driving pulley 77 having the gear 77a sticked thereon by rubber baking. Thus, noise produced when the gears are engaged can be reduced.

Description

Ignitor of IC engine

The present invention relates to be provided with the ignitor of IC engine in the vehicle of belt type continuously variable transmission.

Disclosed starting mechanism is made by the driving of starter motor and to jump into gear and protrude when starting, and is meshed with the gear that becomes one with bent axle, and rotation is passed to bent axle, thus cranking internal combustion engine.Because being meshing with each other of external gear is in relieving state when removing starting, so can prevent fully that starter motor from becoming load.

For example, Japanese patent gazette is real opens the mechanism that discloses a kind of like this cranking internal combustion engine flat 3-33792 number: by the driving of starter motor, the starting ratch of jumping into mechanism is outstanding, be meshed with the starter ring generating gear of the fixedly belt pulley outer periphery that are arranged at belt type continuously variable transmission, thus turning crankshaft, cranking internal combustion engine.

But, be meshed because the starting ratch is jumped out with the starter ring generating gear, so produce very big engaging-in noise sometimes.

The present invention proposes in view of such shortcoming, its purpose is to provide a kind of starting arrangement of internal-combustion engine, make it in cooling belt type continuously variable transmission chamber, thereby the engaging-in noise that produces when gear being jumped into be meshed with the gear that is formed at the drive pulley outer periphery because of the driving of starter motor in the time of can reducing cranking internal combustion engine makes it can realize quiet starting.

For achieving the above object, the invention provides the starting mechanism in a kind of vehicle, this vehicle set has belt type continuously variable transmission and starting mechanism, jump out gear and protrude with the gear that is formed at the drive pulley outer periphery and be meshed thereby the driving of its starting mechanism by starter motor makes, make the crankshaft rotating of rotating with this drive pulley one, thus cranking internal combustion engine; This ignitor of IC engine is characterised in that: on the side of the opposite side with belt of the drive pulley that is formed with said gear, be pasted with the rubber system fan of belt type continuously variable transmission chamber cooling usefulness by the rubber sintering.

Owing to forming the rubber system fan that is pasted with cooling usefulness in belt type continuously variable transmission chamber on the side cogged drive pulley, an opposite side with belt by the rubber sintering, so this fan is in cooling belt continuously variable transmission chamber, damping that has because of the elasticity of fan rubber and sound absorption add and the damping and the sound absorption of the belt of the opposite side of fan of drive pulley, can reduce the engaging-in noise of jumping into gear effectively.

Owing to can make the fan of the belt type continuously variable transmission chamber cooling usefulness that also possessed have damping and sound-absorbing effect in the past, so do not need the part of special damping and sound-absorbing special use, needn't increase number of parts, also not need special space in addition, also can not make the volume of internal-combustion engine become big.

Ignitor of IC engine of the present invention does not have other opening except have the opening that exhaust uses at the rear portion in above-mentioned belt type continuously variable transmission chamber, thereby the cooling air introducing port that does not have cooling usefulness in belt type continuously variable transmission chamber in the front portion of belt type continuous variable transmission chamber, so above-mentioned engaging-in noise is difficult to pass to the outside of belt type continuously variable transmission chamber, can make its solemn silence more.

Fig. 1 is the unitary side view of the scooter of one embodiment of the invention.

Fig. 2 is the II-II line side cross sectional view of the internal-combustion engine of this scooter along Fig. 1.

Fig. 3 is the III-III line side cross sectional view along Fig. 2.

Fig. 4 is the IV-IV line side cross sectional view along Fig. 3.

Fig. 5 is the fixedly belt pulley in the drive pulley and the left side view of cooling fan.

Fig. 6 is the VI-VI line side cross sectional view along Fig. 5.

Fig. 7 is the VII-VII line side cross sectional view along Fig. 5.

Fig. 8 is the left side view of transmission case cover.

Below referring to figs. 1 through Fig. 8 one embodiment of the invention are described.

Fig. 1 is the side view that the scooter of the swing internal-combustion engine in unit is housed of the present invention.

Vehicular body front 2 is connected by lower table top portion 4 with rear vehicle 3, and the vehicle frame that constitutes body framing is by the

bend pipe

6 and 7 of the persons in charge constitute down.

Promptly, following bend pipe 6 is from manipulation 5 extension downwards of Vehicular body front 2, this time bend pipe 6 bends to horizontal in the lower end, lower direction rear extension by table top portion 4, being responsible for 7 with pairing left and right in its back-end is connected, be responsible for 7 and rearward erect at a slant, bend to horizontally at the height of regulation, stretch to the rear then from this joint.

Be responsible for 7 supporting fuel case and containers by this, be provided with seat 8 above it.

On the other hand, Vehicular body front 2 is supporting by handling 5, is provided with handlebar 11 up, and front fork 12 extends downwards, front-wheel 13 in its lower end with pivot suspension.

Convex with carriage 15 in the lower end of being responsible for 7 rising portions, swing unit 17 shakes freely by connecting rod 16 and connects, is bearing on this carriage 15.

Be equipped with single cylinder 4 stroke IC engines 30 in the front portion of swing unit 17, its cylinder body 32 leans forward to the state of almost horizontal, and the end of suspension 18 (this suspension 18 forwards protrudes from the lower end that is equivalent to the unit and waves the crankcase part of case 31) is connected with above-mentioned connecting rod 16 by pivot 19.

Belt type continuously variable transmission 35 connects rearward from this internal-combustion engine 30, and the reducing gear 38 that is arranged at its rear portion is bearing on the axle of trailing wheel 21.

Between the upper end of this reducing gear 38 and the above-mentioned person in charge's 7 upper bend portion, posterior bumper 22 is housed.

Be equipped with the vaporizer 24 and the air-strainer 25 that is connected with this vaporizer 24 that connects sucking pipe 23 (this sucking pipe 23 is come from the top extension of the cylinder cap 33 of internal-combustion engine 30) on the top of swing unit 17.

On the other hand, master bracket 26 usefulness axles be convexly set in the suspension 18 that waves the bottom of case 31 in the unit and be connected, the cardinal extremity of starting lever 28 is fastened on the starting shaft 27 that stretches out from the transmission case cover 36 of belt type continuously variable transmission 35, is provided with starting pedal 29 at the front end of this starting lever 28.

Vehicular body front 2 is covered from front and back by front shroud 9a and back cover 9b, and is covered from the left and right sides by the preceding 9c of cover down, and the central part of handlebar 11 is covered by handlebar cover 9d.

Table top portion 4 is covered by side cover 9e, and in addition, rear vehicle 3 is covered from the left and right sides by car body cover 10a and rear side cover 10b.

Fig. 2 is the sectional view that the II-II cutting line along Fig. 1 dissects swing unit 17, launch.

The unit waves case 31 and is integrated and constitutes being divided into two-part left unit box 31L in the left and right sides and right unit box 31R, right unit box 31R constitutes half of crankcase portion, size is bigger before and after the unit box 31L of a left side, is made of the 31a of crankcase portion of front portion, the 31b of transmission case portion of central authorities and the 31c of reduction-gear housing portion at rear portion.

The left open face of this left side unit box 31L is covered by transmission case cover 36, and its inside accommodates belt type continuously variable transmission 35, and the right side open surface of the 31c of reduction-gear housing portion at rear is covered by reduction-gear housing 37, and its inside accommodates reducing gear 38.

In the so-called crankcase of 31a of crankcase portion and right unit box 31R, bent axle 40 rotations are bearing on the left and right sides main bearing 41,41 freely, in the extension part that substantially horizontal is extended to the left and right, right extension part is provided with AC generator 60, and left extension part is provided with the drive pulley 76 of cam chain driving sprocket wheel 55 and belt type continuously variable transmission 35.

The connecting rod 43 of internal-combustion engine 30 is connected with the crankpin 40a of bent axle 40 with piston 42 (moving reciprocatingly in the cylinder sleeve 44 of cylinder body 32).

This 4 stroke IC engine 30 adopts the valve system of OHC pattern, in cylinder head cover 34, be provided with valve mechanism 50, cam chain 51 to these valve mechanism 50 transferring power is erected between camshaft 53 and the bent axle 40, and the cam chain chamber 52 that is provided with is connected with the 31a of crankcase portion, cylinder body 32 and cylinder cap 33 for this reason.

Just cam chain 51 passes cam chain chamber 52, be erected at be flush-mounted in camshaft 53 (this camshaft 53 points to the left and right horizontal directions) left end by movable sprocket 54 and be flush-mounted between the above-mentioned driving sprocket wheel 55 on the bent axle 40.

Embed spark plug 45 on cylinder cap 33, its direction is towards the firing chamber from a side (right side) opposite with cam chain chamber 52.

As shown in Figure 3, valve mechanism 50 in the cylinder head cover 34, because of cylinder leans forward to the state of almost horizontal, so set intake valve 56 and exhaust valve 57 up and down; Rocker arm 59,59 shakes and is installed in respectively freely up and down on the

pitman arm shaft

58,58; because the rotation of the cam of camshaft 53, Rocker arm 59,59 just shakes, and makes intake valve 56 and exhaust valve 57 make on-off action with the cycle of regulation at camshaft 53.

In the AC generator 60 that is arranged at right unit box 31R right flank, bowl-shape external rotor 62 is fastened on bent axle 40 from end that the cylindrical part 31d of right unit box 31R central authorities stretches out by ACG hub 61, along the circumferential direction be equipped with magnet 63 within it on the side face, in the inboard of this magnet 63, the stator 64 that has twined stator coil 65 is fixed on the central cylindrical part 31d.

Right flank at external rotor 62 is equipped with forced air cooling fan 66, and fan guard 67 covers its side, and is provided with fan hub 68, and it is connected with this fan guard 67, around covering cylinder body 32 and the cylinder cap 33.

On the other hand, wave the 31a of crankcase portion of case 31 in the unit, above-mentioned cam chain chamber 52 is just in time separated itself and crankshaft room by main bearing 41 and forms, the left side wall of this cam chain chamber 52 is partition walls 71 that the belt type continuously variable transmission chamber 70 in left side and cam chain chamber 52 are separated, be formed with the circular through hole 71a (being large diameter flat partially cylindric) that bent axle 40 can therefrom pass on this partition wall 71, annular seals 72 is pressed among this through hole 71a, and bent axle 40 passes from the hollow portion of this annular seals 72.

Above-mentioned driving sprocket wheel 55 is inlaid on the bent axle 40 between sealing part 72 and the main bearing 41, and under above-mentioned cam chain 51 was wrapped in state on this driving sprocket wheel 55, its maximum outside diameter was littler than the internal diameter of the external diameter of annular seals 72 and through hole 71a.

Therefore as if the annular seals 72 of dismantling from through hole 71a, because of having large diameter through hole 71a, so can utilize this opening to pull down or be wrapped with cam chain 51 thereon from driving sprocket wheel 55.

By sealing part 72 belt type continuously variable transmission chamber 70 and cam chain chamber 52 liquid are thickly separated, prevent that oil liquid leakage is to stepless speed variator chamber 70.

Passing on the bent axle 40 that Sealing 72 extends out, be provided with can with its drive pulley that rotates simultaneously 76.

Drive pulley 76 is by fixedly belt pulley 77 and movable belt dish 78 are constituted, fixedly belt pulley 77 is fastened on the left end of bent axle 40 by hub 79, on its right side, movable belt dish 78 is connected with bent axle 40 splines, this movable belt dish 78 can be with bent axle 40 rotations, thereby and can slide vertically near or away from fixing belt pulley 77, v belt 75 clampings, be wrapped between two belt pulleys 77,78.

Fixed position in the close above-mentioned annular seals 72 in the right side of movable belt dish 78, be provided with cam disk 80, and the slider 80a that is arranged at its outer circumference end engages with the cam disk slip hub 78a of portion sliding freely, and this cam disk slip hub 78a of portion forms vertically in the outer circumference end of movable belt dish 78.

Movable belt dish 78 forms the conical surface in the side of cam disk 80 1 sides towards cam disk 80 1 sides, and roller 81 is seized on both sides by the arms by cam disk 80, is contained in this conical surface inboard.

Therefore, when the rotational speed of bent axle 40 increases, the roller 81 of rotation simultaneously between movable belt dish 78 and cam disk 80 moves to centrifugal direction by centrifugal force, movable belt dish 78 is by these roller 81 extruding, be moved to the left, thereby approaching fixedly belt pulley 77 makes the v belt 75 that is clipped between two belt pulleys 77,78 move, twine to centrifugal direction, thereby makes diameter pulley become big.

Constituted by two such belt pulleys 87,88 with the negative pulley wheel 86 at such drive pulley 76 corresponding rears: its fixedly belt pulley 87 be inlaid on the interior cover 89 that reducer input shaft 92 rotations of relative reducing gear 38 are supporting freely, in the fixing left side of belt pulley 87, on the overcoat 90 in movable belt dish 88 is inlaid in and can be bearing in slidably freely vertically on the cover 89.

Above-mentioned v belt 75 is seized on both sides by the arms between two belt pulleys 87,88.

Centrifugal clutch 91 is arranged on the left side of reducer input shaft 92 and interior cover 89, and when its rotational speed increased, centrifugal clutch 91 engaged, and the transmission of power of cover 89 is to reducer input shaft 92 in being sent to by v belt 75.

Reducing gear 38 is to be delivered to output shaft 94 after the power that will be delivered to reducer input shaft 92 is slowed down via jack shaft 93 and by gear engagement, and output shaft 94 makes trailing wheel 21 rotations by the axletree of trailing wheel 21.

Hub portion at trailing wheel 21 is provided with drum brake 95, and the drum brake arm 97 that connects brake cable is housed on the drum brake axle 96, and when the pulling brake cable, drum brake arm 97 shakes, and makes 96 rotations of drum brake axle, drum brake 95 work.

Cover the transmission case cover 36 of belt type continuously variable transmission chamber 70 from the left side, cover centrifugal clutch 91 from the drive pulley 76 in the place ahead to the rear, above-mentioned starting shaft 27 rotations are passed and are supported in the more forward place of central authorities freely, inner end at this starting shaft 27 is equipped with driving spiral gear 100, and is subjected to the effect of return spring 101.

Rotatable and can be bearing in the inside of transmission case cover 36 front portions vertically movably with the coaxial sliding axle of bent axle 40 102, on this sliding axle 102, be formed with passive spiral gear 103, this passive spiral gear 103 is meshed with above-mentioned driving spiral gear 100, and be fastened with ratchet 104 at right-hand member, make its integral body have the trend that is moved to the left by friction spring (Off リ Network ショ Application スプリ Application グ) 105.

On the other hand, on the hub 79 of bent axle 40 1 sides, be formed with ratchet 79a opposed to each other with ratchet 104, both can separate or engage because of the slip of sliding axle 102.

Therefore, when depressing spring force that starting pedal 29 makes starting shaft 27 overcome return spring 101 by starting lever 28 and rotate, drive spiral gear 100 and the rotation of starting shaft 27 one, passive spiral gear 103 that is meshed with it and the rotation of sliding axle 102 one, the spring force that overcomes friction spring 105 simultaneously slides to the right, ratchet 104 is meshed with the ratchet 79a of hub 79, can makes bent axle 40 rotations forcibly, thus cranking internal combustion engine 30.

On the other hand, internal-combustion engine is equipped with starter motor 110 above the 31a of crankcase portion of left unit box 31L, as shown in Figure 4, (this ratch 113 forms inner rotator to the ratch 113 of starter motor 110, be trapped among around it by the magnet 111 of outer stator, be wound with coil 112 in the above) to stretch out in the left side, the end of ratch 113 is formed with gear 113a.

Jumping into gear mechanism 115 is being seized on both sides by the arms by 31a of crankcase portion and transmission case cover 36, make its sensing left and right horizontal direction, be arranged between starter motor 110 and the drive pulley 76, the input gear 116 that ratch gear 113a and this of starter motor 110 jumped into gear mechanism 115 right sides is meshed, the jumping into gear 117 then the starter ring generating gear 77a of belt pulley 77 outer periphery is meshed with being formed at fixedly if jump out to the left of opposite side left side.

Therefore, when starter motor 110 drove, the rotation of ratch 113 was delivered to the input gear 116 of jumping into gear mechanism 115, jumping into gear 117 jumps to the left, with the starter ring generating gear 77a engagement of fixing belt pulley 77, make fixedly that belt pulley 77 and bent axle 40 rotate simultaneously, can cranking internal combustion engine 30.

If starter motor 110 stops, then jumping into gear 117 withdrawal, be disengaged with the engagement of starter ring generating gear 77a.

Be formed with the fixedly belt pulley 77 of starter ring generating gear 77a (bear and jump into the engaging-in of gear 117), with the side (left surface) of side thereof opposite one side of clamping v belt 75, be pasted with the cooling fan 118 of rubber system by the rubber sintering, cool off belt type continuously variable transmission 35 by the rotation of cooling fan 118.

Extremely shown in Figure 7 as Fig. 5, the cooling fan 118 of rubber system is on the face of the discoideus thin skin film 118a of hollow, along the circumferential direction outstandingly be formed with the recurvate blade 118b of some relative sense of rotation and make, epithelium 118a sintering is on the left surface of fixing belt pulley 77.

Like this, bear and jump into the engaging-in fixedly belt pulley 77 of gear 117, in an one side v belt 75 is arranged, and be pasted with the cooling fan 118 of rubber system in the side of an opposite side, and form a kind of structure, fixedly belt pulley 77 is had the damping that produced by rubber elasticity and the v belt 75 and the cooling fan 118 of sound absorption clips exactly, the engaging-in noise that produces in the time of can reducing the starter ring generating gear 77a that jumps into gear 117 engaging-in fixedly belt pulleys 77 effectively, undisturbedly cranking internal combustion engine 30.

Cooling fan 118 usefulness rubber are made, can resiliently deformables, so, rotation is stopped or damaged blade 118b even engaging-in foreign matter also can be avoided because of resiliently deformable during rotation.

Owing to also have in the past cooling fan is installed in example on the drive pulley, so this internal-combustion engine 30 makes this cooling fan for to make with rubber, the part that does not need other damping and sound-absorbing special use, number of parts is increased, nor need the parts peculiar occupation space, can not make internal-combustion engine 30 volumes become big yet.

Shown in the dotted line of Fig. 8, constitute the transmission case cover 36 of this belt type continuously variable transmission chamber 70, the air outlet flue 119 that roughly is formed with tubular along side wall inner surface fore-and-aft tilt ground at fore-and-aft direction near the position of central authorities, its upper end open is opened wide in the indoor side, lower ending opening opens wide in the outdoor, makes the heat energy in the stepless speed variator chamber 70 be discharged into the outside from this air outlet flue 119.

On transmission case cover 36, the opening that except that above-mentioned air outlet flue 119, does not have aspirating unit etc. to be in communication with the outside, though so above-mentioned reduced but still produce a little, the engaging-in noise when jumping into the engaging-in fixedly belt pulley 77 starter ring generating gear 77a of gear 117 is difficult to pass to the external world, thereby the abnormal sound during 30 startings of blocking-up internal-combustion engine makes its solemn silence more.

The present invention is because on the side of an opposite side with belt that forms cogged drive pulley, be pasted with the fan of the rubber system of belt type continuously variable transmission chamber cooling usefulness by the rubber sintering, so, this fan is in cooling belt type continuously variable transmission chamber, the damping and the sound absorption that have because of the rubber elasticity of fan, add and the damping and the sound absorption of the belt of the opposite side of fan of drive pulley, can reduce the engaging-in noise of jumping into gear effectively.

Owing to be to make the fan of the belt type continuously variable transmission chamber cooling usefulness that also possessed have damping and sound-absorbing effect in the past, so do not need the part of special damping and sound-absorbing special use, needn't increase number of parts, also not need special space in addition, can not make the volume of internal-combustion engine become big.

In the belt type continuously variable transmission chamber, there be not other opening except have exhaust at the rear portion with opening because of making it, so tooth is gone into the outside that noise is difficult to pass to the belt type continuously variable transmission chamber, can make its solemn silence more.

Claims

1. the ignitor of IC engine in the vehicle, this vehicle set has belt type continuously variable transmission and starting mechanism, jump out gear and protrude with the gear that is formed at the drive pulley outer periphery and be meshed thereby the driving of its starting mechanism by starter motor makes, make the crankshaft rotating of rotating with this drive pulley one, thus cranking internal combustion engine; This ignitor of IC engine is characterised in that:

On the side drive pulley that is formed with said gear, an opposite side with belt, be pasted with the rubber system fan of belt type continuously variable transmission chamber cooling usefulness by the rubber sintering.

2. ignitor of IC engine as claimed in claim 1 is characterized in that: indoor at above-mentioned belt type continuously variable transmission, except have the opening that exhaust uses at the rear portion, there is not other opening.