CN1517540A

CN1517540A - Oil circulation structure of engine for automatic two, three-wheel cycle

Info

Publication number: CN1517540A
Application number: CNA2004100020270A
Authority: CN
Inventors: 石川秀男
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2003-01-15
Filing date: 2004-01-12
Publication date: 2004-08-04
Anticipated expiration: 2024-01-12
Also published as: ES2264309A1; TWI240041B; JP4057923B2; TW200420827A; JP2004218523A; ES2264309B1; CN1271325C

Abstract

To sufficiently secure the volume of an oil reservoir, avoiding that a crankcase is protruded downward and backward in an engine for a motorcycle and a three-wheeled vehicle in which a crank chamber housing most of a crankshaft and an oil reservoir arranged on the rear side of the crankshaft are formed in the crankcase with them partitioned and a return pump for returning oil on the side of the crank chamber to the oil reservoir is attached to the crankcase. A return pump 127 is attached to a lower part of a crankcase 14 in front of a crankshaft 12 and a return pipe 145 for leading oil discharged from the return pump 127 to the side of an oil reservoir 125 is arranged under the crankshaft 12 in a crank chamber 124.

Description

The oily loop structure of automatic two, three-wheel vehicular engine

Technical field

The present invention relates to a kind of in crankcase, be formed with will accommodate bent axle most crankshaft room with the accumulator of the rear side that is configured in above-mentioned bent axle spaced apart from each other and with the oil of above-mentioned crankshaft room side turn back to above-mentioned accumulator dump pump be installed in automatic two, three-wheel vehicular engine in the crankcase, relate in particular to the improvement of oily loop structure.

Background technique

For example, patent documentation 1 grade discloses a kind of automatic two-wheel vehicle used motor that disposes dump pump in crankcase, between crankshaft room and accumulator.

Patent documentation 1: the spy opens the 2002-21522 communique

But, in automatic two-wheel vehicle used motor, need restriction crankcase protrusion downwards in order to ensure the minimum altitude on distance ground, in addition, because at the rear of crankcase configuration trailing wheel, so also need to avoid crankcase protrusion rearward, in above-mentioned conventional example, be difficult to guarantee fully the volume of accumulator.

Summary of the invention

The present invention proposes in view of above-mentioned present situation, and its purpose is to provide a kind of oily loop structure of automatic two, three-wheel vehicular engine that can avoid crankcase to reach the protrusion at rear downwards and fully guarantee the volume of accumulator.

To achieve these goals, the present invention 1 automatic two, the oily loop structure of three-wheel vehicular engine, it is characterized in that: be in crankcase, forming to zoning the most crankshaft room of taking in bent axle mutually, and be configured in the accumulator of the rear side of above-mentioned bent axle, and the dump pump automatic two that the oil of above-mentioned crankshaft room one side is turned back to above-mentioned accumulator is installed in crankcase, in the three-wheel vehicular engine, above-mentioned dump pump, be installed in the bottom of crankcase in the place ahead of above-mentioned bent axle, the return tube of above-mentioned accumulator one side that will lead from the oil that above-mentioned dump pump is discharged, in above-mentioned crankshaft room, be configured in above-mentioned bent axle below.

1 structure according to the present invention, because dump pump is installed on the crankcase in the place ahead of bent axle, so with above-mentioned existing comparing, the volume of accumulator can be enlarged in crankshaft side, and since with dump pump in crankshaft room, be configured in bent axle below, stretch out so can avoid crankcase to reach the rear downwards, and fully guarantee the volume of accumulator.

The present invention 2 automatic two, the oily loop structure of three-wheel vehicular engine, based on the present invention's 1, it is characterized in that: above-mentioned dump pump, along being configured on the position of departing from accumulator on the direction of the axis of above-mentioned bent axle, overlook an end of the above-mentioned return tube that slightly is the L font, close and can insert and break away from ground and insert on the pump case of above-mentioned dump pump and the dividing plate between above-mentioned accumulator and above-mentioned crankshaft room one by liquid, and the other end of above-mentioned return tube, be fastened on another of above-mentioned pump case and aforementioned barriers, according to said structure, easily return tube is assembled on the crankcase, and, because of need not assembling, the tip side at return tube uses parts, so can reduce component number.

The present invention 3 automatic two, the oily loop structure of three-wheel vehicular engine, based on the present invention's 2, it is characterized in that: shared above-mentioned pump case, coaxial in conjunction with oil feed pump and the above-mentioned dump pump of the oil that promotes above-mentioned accumulator to each lubricated portion supply, the suction pipe that will import above-mentioned oil feed pump from the oil that above-mentioned accumulator sucks forms and is configured in the space that above-mentioned return tube surrounds along above-mentioned return tube, according to said structure, when can constitute dump pump and oil feed pump compactly, not only can reduce the volume of accumulator as far as possible but also can guarantee the length of suction pipe, and also can improve the assembling performance of suction pipe.

The present invention 4 automatic two, the oily loop structure of three-wheel vehicular engine, based on the present invention's 3, it is characterized in that: the forward end bottom of above-mentioned return tube in above-mentioned accumulator is connected on the aforementioned barriers, one end is connected the other end of the above-mentioned suction pipe on the above-mentioned oil feed pump, be communicated with bottom in the above-mentioned accumulator in the place ahead of the joint of the aforementioned barriers of above-mentioned return tube, and be connected with oil cleaner screen on being equipped on above-mentioned crankcase, according to said structure, can shorten the oily path from the accumulator to the oil feed pump and improve the pump efficiency of oil feed pump, and, the height of the liquid level of the oil in only from the oil cleaner screen to accumulator part is to oil cleaner screen effect oil pressure, therefore can suppress from oil cleaner screen through the hydraulic slip of suction pipe to the path of oil feed pump.

Description of drawings

Fig. 1 is the side view of automatic two-wheeled cycle.

Fig. 2 is the side view from the partial cutaway of the power plant of the direction observation identical with Fig. 1.

Fig. 3 is the 3-3 line sectional view of Fig. 2.

Fig. 4 is the enlarged view of the major component of Fig. 3.

Fig. 5 is the side view from the partial cutaway of the power plant of the arrow 5 directions observation of Fig. 3.

Fig. 6 is the 6-6 line amplification view of Fig. 2.

Fig. 7 is the enlarged view of the major component of Fig. 6.

Fig. 8 is the sectional view from the crankcase of the 8-8 line direction of arrow observation of Fig. 3.

Fig. 9 is the major component enlarged view of Fig. 5.

Among the figure: 12-bent axle, 14-crankcase, 14b-dividing plate, 124-crankshaft room, 125-accumulator, 127-dump pump, 128-oil feed pump, 129-pump case, 145-return tube, 157-suction pipe, 161-oil cleaner screen, E-motor.

Embodiment

Below, based on one embodiment of the invention shown in the drawings embodiments of the invention are described.

Fig. 1～Fig. 9 is the figure of expression one embodiment of the invention, Fig. 1 is the side view of automatic two-wheeled cycle, Fig. 2 is the side view from the partial cutaway of the power plant of the direction observation identical with Fig. 1, Fig. 3 is the 3-3 line sectional view of Fig. 2, Fig. 4 is the enlarged view of the major component of Fig. 3, Fig. 5 is the side view from the partial cutaway of the power plant of the arrow 5 directions observation of Fig. 3, Fig. 6 is the 6-6 line amplification view of Fig. 2, Fig. 7 is the enlarged view of the major component of Fig. 6, Fig. 8 is that Fig. 9 is the major component enlarged view of Fig. 5 from the sectional view of the crankcase of the 8-8 line direction of arrow observation of Fig. 3.

At first, among Fig. 1, loading the power plant P that is configured between front-wheel WF and the trailing wheel WR on the vehicle frame 11 of this automatic two-wheeled cycle, these power plant P by motor E and be arranged on this motor E and the axletree 18 of trailing wheel WR between power transmitting deice T constitute.

With reference to Fig. 2～Fig. 6, for the engine main body 13 of the double cylinder above-mentioned motor E of V-type has the crankcase 14 that free rotary ground supporting has the bent axle 12 of the axis that the right and left at vehicle frame 11 stretches upwards, be the V-type configuration of opening towards the place ahead oblique upper, the front and rear cylinder block 15F that combines with above-mentioned crankcase 14,15R, with each cylinder block 15F, 15R is the front and rear cylinder head 16F of combination respectively, 16R and with front and rear cylinder block 15F, side that 15R is opposite and front and rear cylinder head 16F, the front and rear end cap 17F of 16R combination, 17R.

The right side half chests body 20 on the left side half chests body 19 in the left side of crankcase 14 during by the direct of travel that is configured in towards automatic two-wheeled cycle and the right side when being configured in direct of travel towards automatic two-wheeled cycle mutually combines and constitutes, and two

halves casing

19,20 mutually combines by the junction plane 21 that is configured on the engine center C.

The left hand crankshaft collar 22 that is arranged on the left side half chests body 19 is passed in one end of bent axle 12, by these crankshaft journal portion 22 free rotary ground supportings, the right hand crankshaft collar 23 that is arranged on the right side half chests body 20 is passed in the other end of bent axle 12, by these crankshaft journal portion 23 free rotary ground supportings.

Bent axle 12 has the 1st counter weight 24 of the inboard that is configured in left hand crankshaft collar 22 and is configured in the 2nd counter weight 25 of the inboard of right hand crankshaft collar 23, the big end of the big end of the connecting rod 28F that is connected with piston 27F in being entrenched in the cylinder bore 26F that is arranged on anterior cylinder block 15F and the connecting rod 28R that is connected with piston 27R in being entrenched in the cylinder bore 26R that is arranged on rear portion cylinder block 15R with being free to slide with being free to slide, be rotatably connected to link between the 1st and the

2nd counter weight

24,25, be arranged on the crankpin 29 on the bent axle 12.

Rear portion cylinder block 15R, end deflection configuration at axis from anterior cylinder block 15F along bent axle 12, the big end of above-mentioned two connecting

rod

28F, 28R, the connecting rod 28F of anterior cylinder block 15F one side is near 25 configurations of the 2nd counter weight, and the connecting rod 28R of rear portion cylinder block 15R one side is attached on the crankpin 29 between the 1st and the

2nd counter weight

24,25 near 24 configurations of the 1st counter weight.So, above-mentioned engine center C just between two connecting

rod

28F, 28R along the fore-and-aft direction of automatic two-wheeled cycle.

End at the bent axle 12 that highlights from left hand crankshaft collar 22 is installed with generator 30, and this generator 30 is made of the rotor 31 of an end that is fixed on bent axle 12 and the stator 32 that is housed in this rotor 31.The port engine cowling 33 that this generator 30 is bonded on the left side half chests body 19 of crankcase 14 covers, and said stator 32 is fixed on the port engine cowling 33.

Between left crankshaft journal portion 22 and generator 30, disposing coaxial driven gear 35 around bent axle 12, this driven gear 35 is attached at by overrunning clutch 34 on the rotor 31 of generator 30.And the starting motor 36 with spin axis parallel with bent axle 12 by the upper support of crankcase 14, is provided with driving pinion 37 on the output shaft of this starting motor 36 between front and rear cylinder block 15F, 15R.In addition, between the left side of crankcase 14 half chests body 19 and above-mentioned port engine cowling 33, the integrally formed the 1st with the 2nd

intermediate gear

38,39, can on the axis parallel, be supported rotatably with bent axle 12 with the 3rd intermediate gear 40, above-mentioned driving pinion 37 and 1st intermediate gear 38 engagements bigger than these driving pinion 37 diameters, than the 2nd little intermediate gear 39 of the 1st intermediate gear 38 diameters, with bigger than the 2nd intermediate gear 39 diameters, with the 3rd intermediate gear 40 engagements of driven gear 35 engagements.

Therefore, by when firing an engine E, making starting motor 36 work, come the driving force of self-drive motor 36 just to be decelerated and to be delivered to bent axle 12, and after motor E starts, by the effect of overrunning clutch 34, can not be passed to starting motor 36 1 sides from the power of bent axle 12.

In the other end from the outstanding bent axle 12 of right hand crankshaft collar 23, fixing integrated a pair of driving

sprocket wheel

44F, 44R, hanging up on driving sprocket wheel 44F therein and be used to drive the cam chain 46F that is arranged on the valve device 45F on the anterior cylinder head 16F, be used to drive the cam chain 46R that is arranged on the valve device 45R on the cylinder head 16R of rear portion hanging up on another driving sprocket wheel 44R.And the starboard engine cowling 47 that covers the other end of bent axle 12 combines with the right side half chests body 20 of crankcase 14.

Among Fig. 1, the air-strainer 48 that is configured in the oblique top, the place ahead of motor E is loaded on the vehicle frame 11, and, the fuel tank 49 that is configured in air-strainer 48 tops is loaded on the vehicle frame 11, forwardly with rear

portion cylinder head

16F, 16R on, connecting above-mentioned air-strainer 48 by independent sucking pipe 50F, 50R.And guiding is connected on the muffler 52 on the right side that is configured in trailing wheel WR jointly from outlet pipe 51F, the 51R of the waste gas that front and

rear cylinder head

16F, 16R discharge.

Power transmitting deice T, having will be from the power of the bent axle 12 output belt type continuously variable transmission 53 of speed change automatically and infinitely, the reduction gear row 54 that the output of this belt type continuously variable transmission 53 is slowed down, and be arranged on chain type transmission device 55 between the axletree 18 of reduction gear row 54 and trailing wheel WR.

Dispose the gearbox casing 56 of this lid power transmitting deice T, by the left side and the right side half chests body 19 that are wholely set at crankcase 14, on 20, the front portion is configured in the right side of the 14a of casing support part that rearward stretches, the rear portion is configured in the casing main body 57 that stretch the front and back in the left side of trailing wheel WR, with first half right side of covering this casing main body 57 and the right side casing 58 that combines with casing main body 57, constitute with latter half of left side of covering this casing main body 57 and the left side casing that combines with casing main body 57 59, the front portion of casing main body 57 is attached on the 14a of casing support part on the crankcase 14.

Between the first half of casing main body 57 and right side casing 58, form speed changer chamber 60, formative gear chamber 61 between the latter half of of casing main body 57 and left side casing 59.

Belt type continuously variable transmission 53, be housed in the speed changer chamber 60, be provided with in the plane that is configured in the axis normal of bent axle 12 from position that this bent axle 12 leaves, have a drive belt wheel shaft 62 of the axis parallel with bent axle 12, with driven pulley axle 63 with axis parallel with this drive belt wheel shaft 62, with the drive pulley 64 that is installed on the drive belt wheel shaft 62, with be installed in the driven pulley 65 on the driven pulley axle 63 and hang up ring-like vee-belt 66 on drive pulley 64 and driven pulley 65.

Drive belt wheel shaft 62 is configured in the rear of bent axle 12, one end of this drive belt wheel shaft 62, be set at a distolateral bearing portion 67 free rotary ground supportings on the left side half chests body 19 of crankcase 14, the intermediate portion of drive belt wheel shaft 62, be set at intermediate bearing portion 68 free rotary ground supportings on the right side half chests body 20 of crankcase 14, the other end of drive belt wheel shaft 62 is set at the other end side bearing portion 69 free rotary ground supportings on the right side casing 58 of gearbox casing 56.And intermediate bearing portion 68 has the corresponding to shape of rotating locus of periphery of the 2nd counter weight 25 of partial shape and bent axle 12, and is arranged on the right side half chests body 20 of crankcase 14.

Between bent axle 12 and drive belt wheel shaft 62, the driving gear row 70 of the inboard of the outside that is positioned at the 1st counter weight 24, left hand crankshaft collar 22 are being set, the generator 30 that is configured in left hand crankshaft axle journal 22 outsides is configured in the outside of driving gear row 70.

Above-mentioned driving gear row 70, by being fixed on the actuation gear 71 on the bent axle 12 and being fixed on the drive belt wheel shaft 62, constitute with the driven gear 72 of actuation gear 71 engagements, the generation of the extraordinary noise that causes for the backlash that suppresses by the engaging piece of intermeshing actuation gear 71 and driven gear 72, equipment gear 73 with actuation gear 71 engagements is installed on drive belt wheel shaft 62, and make its can with driven gear 72 relative rotations, performance is being set between driven gear 72 and equipment gear 73 is making two gears 72, the spring of the elastic force of 73 counterrotating directions (not shown).

In above-mentioned one distolateral bearing portion 67, a bearing at end hole 74 that connects drive belt wheel shaft 62 is being set with rotating freely, between the outside of the inner face of this bearing hole 74 and drive belt wheel shaft 62, ball bearing 75 is installed.And in above-mentioned intermediate bearing portion 68, with above-mentioned bearing hole 74 bearing hole 76 that connects the axial intermediate portion of drive belt wheel shaft 62 is being set coaxially with rotating freely, between the outside of the inner face of bearing hole 76 and drive belt wheel shaft 62, the sealing component 78 of ball bearing 77 and ring-type is installed.And in above-mentioned the other end side bearing portion 69, with above-mentioned each

bearing hole

74,76 bearing hole that the end is arranged 79 of the other end of inserting drive belt wheel shaft 62 is being set coaxially, between the outside of the inner face of bearing hole 79 and drive belt wheel shaft 62, ball bearing 80 is being installed.

Drive pulley 64, driving side fast pulley halfbody 84 by the other end that is fixed on drive belt wheel shaft 62, constitute with the movable half-pulley 85 of driving side of can be approaching, being bearing on the drive belt wheel shaft 62 away from driving side fast pulley halfbody 84, slidably, drive belt wheel shaft 62 is configured in and sees the position that the part of drive pulley 64 is overlapped with rotating locus that the periphery of the 1st and the

2nd counter weight

24,25 of bent axle 12 is described from the side.

And, the movable half-pulley 85 of above-mentioned driving side, by be disposed on the driving sprocket wheel 44F, the 44R that hang up above-mentioned

cam chain

46F, 46R with along the pulley driving device 86 of the corresponding position of the direction of the axis of above-mentioned bent axle 12 to axial driving, between movable half-pulley 85 of driving side and above-mentioned intermediate bearing portion 68, disposing above-mentioned pulley driving device 86.

On the drive belt wheel shaft 62 between the inner ring of ball bearing 77 and the driving side fast pulley halfbody 84, sleeve cylindraceous 87 around this drive belt wheel shaft 62 is installed, and the movable half-pulley 85 of driving side can be bearing on this sleeve 87 axially slidably.

Above-mentioned pulley driving device 86, comprise to form and center on the cylindric of above-mentioned sleeve 87, be fixed on the lead screw shaft 88 on the casing main body 57 of gearbox casing 56, be combined in nut 89 on this lead screw shaft 88 with spiral, with driven gear 90 integrally formed on the periphery of nut 89, with be arranged on by the driving pinion 92 on the output shaft of the genemotor 91 of the casing main body 57 of gearbox casing 56 supporting, and the rotating power of genemotor 91 slowed down and be arranged on reduction gear 93 between driving pinion 92 and the driven gear 90 to what driven gear 90 transmitted from driving pinion 92.

According to this pulley driving device 86, corresponding to the action of genemotor 91, nut 89 is done at the axial enterprising deactuate of drive belt wheel shaft 62.And nut 89 is attached on the movable half-pulley 85 of driving side by ball bearing 94, along with the above-mentioned advance and retreat action of nut 89, the movable half-pulley 85 of driving side drive belt wheel shaft 62 axially on slide.

One end of driven pulley axle 63 connects casing main body 57 with rotating freely and charges in the gear chamber 61, between casing main body 57 and driven pulley axle 63 ball bearing 95 is installed.And ball bearing 96 free rotary ground supportings are passed through on right side casing 58 in the other end of driven pulley axle 63.

Driven pulley 65, by certain in the position of axial direction, can be bearing in the relative rotation on the driven pulley axle 63 slave end fast pulley halfbody 97 and can be approaching, away from slave end fast pulley halfbody 97, by slave end fast pulley halfbody 97 slidably and can support with the relative rotation and constitute towards the movable half-pulley 98 of the slave end of slave end fast pulley halfbody 97 elastic force-applyings.

On slave end fast pulley halfbody 97, be wholely set can rotate relatively, coaxial guide portion 97a cylindraceous around driven pulley axle 63, from right side casing 58 1 sides and the movable half-pulley 98 of above-mentioned slave end fast pulley halfbody 97 slave end in opposite directions of

gearbox casing

56,97a supports slidably by guide sections.And between the spring bracket member 99 and the movable half-pulley 98 of slave end of the end of right side casing 58 1 sides that are fixed on guide sections 97a, be provided with the spring 100 of the movable half-pulley 98 of slave end towards the slave end fast pulley halfbody 97 1 side application of forces.

Between the guide portion 97a and slave end Pulley shaft 63 of above-mentioned slave end fast pulley halfbody 97, centrifugal clutch 101 is being set, along with above-mentioned slave end fast pulley halfbody 97 axis around driven pulley axle 63, to surpass the rotating speed rotation of specified value, the rotating power of driven pulley 65 is passed to driven pulley axle 63.

Reduction gear row 54, will be from the rotating power of an end of above-mentioned driven pulley axle 63, be delivered to output shaft 103 via the jack shaft 102 one sides one side of slowing down, and be incorporated in the gear chamber 61, jack shaft 102 and output shaft 103, free rotary ground supporting is on casing main body 57 and left side casing 59, and an end of output shaft 103 is outstanding from left side casing 59.

Chain device 55, by being fixed on coaxial and can not linking driving sprocket wheel 105 on the live axle 104 of above-mentioned output shaft 103 with the relative rotation, constitute with the chain 107 of hanging up ring-type on the driven sprocket 106 on the axletree 18 that is fixed on trailing wheel WR, be incorporated in the chain casing 108 in the left side that is configured in trailing wheel WR.

On left side casing 59, linking the fulcrum cylindraceous 109 of the protuberance of the left side casing 59 that centers on above-mentioned output shaft 103, the front portion of above-mentioned chain casing 108 is supported swingably by radial bearing 110.And live axle 104 can be rotated to support on the chain casing 107 by ball bearing 111,111.

In addition, on the casing main body 57 of gearbox casing 56, the swing axis 112 coaxial with above-mentioned output shaft 103 and live axle 104 is supported swingably by radial bearing 113, and the front portion of the arm 114 that be configured in the right side of trailing wheel WR, stretches forwards, backwards is fixed on the above-mentioned swing axis 112.And the axletree 18 of trailing wheel WR, between the rear portion of the rear portion of chain casing 108 and above-mentioned arm 114, supported by the rotatable earth's axis.

On the driven pulley 65 of belt type continuously variable transmission 53, the movable half-pulley 98 of slave end, from the outside and slave end fast pulley halfbody 97 in opposite directions, can be approaching, away from slave end fast pulley halfbody 97, think that the right side casing 58 of the outer side surface of gearbox casing 56 forms the shape of the anterior protuberance of direction laterally in its rear portion.That is, on right side casing 58, form cover the 58a of low level portion of drive pulley 64 and cover driven pulley 65, than the 58a of low level portion swell laterally and with the back-connected high-order 58b of portion of the above-mentioned low level 58a of portion.

Around above-mentioned drive belt wheel shaft 62, on the above-mentioned low level 58a of portion, a plurality of open-works 115 that are communicated with speed changer chamber 60 are being set ..., integrally formed from above-mentioned each open-work 115 on the driving side fast pulley halfbody 84 of drive pulley 64 ... in speed changer chamber 60, attract a plurality of blade 84a of air ...That is, driving side fast pulley halfbody 84 also works as fan.

On the right side of gearbox casing 56 casing 58, the air that covers the 58a of low level portion is installed imports cover 116, with above-mentioned each open-work 115 ... communicate and import path 117, import between cover 116 and the above-mentioned low level 58a of portion at air and form near the air of the front end opening of the above-mentioned high-order 58b of portion.

And, in the front portion of the high-order 58b of portion, the opening end that imports path 117 with above-mentioned air is accordingly with formation in the air drain passageway 118 of circular-arc formation and the speed changer chamber 60 with communicating, this air drain passageway 118 the rear of above-mentioned air introduction hole 117 towards below opening.

And, back upper lateral part in the casing main body 57 of gearbox casing 56, the upstream extremity of the air discharge tube 119 that forms agley towards the rear from casing main body 57, with earthing connection mutually in the speed changer chamber 60, downstream at this air discharge tube 119, the upstream extremity that is connecting the air discharge tube 120 that stretches to the rear lower side, the downstream of this air discharge tube 120 are open towards the below.

Like this, by rotation along with driving side fast pulley halfbody 84, import path 117 via open-work 115 from air ... import to the air in the speed changer chamber 60, belt type continuously variable transmission 53 is cooled, cooled air, be discharged to the outside of gearbox casing 56 via air drain passageway 118 from speed changer chamber 60, simultaneously, from speed changer chamber 60 via air discharge tube 119,120 are discharged to the outside of gearbox casing 56, the air of discharging downwards particularly from air discharge tube 120, meet outlet pipe 51F, the joint of 51R and muffler 52 also can help outlet pipe 51F, the cooling of 51R.

With reference to Fig. 7～Fig. 9, in crankcase 14, accommodate the major part of bent axle 12 and drive belt wheel shaft 62 an end crankshaft room 124 and be configured in the accumulator 125 at the rear of bent axle 12, by being arranged on the formation of turning up the soil of the mutual zoning of dividing plate 14b in the crankcase 14, above-mentioned accumulator 125, stretch in left side to drive belt wheel shaft 62, with formation conjointly in the port engine cowling 33.

In the place ahead of above-mentioned bent axle 12, the bottom of the left side half chests body 19 of crankcase 14, the oil pump 126 with axis parallel with bent axle 12 is installed.

Oil pump 126 turns back to the dump pump 127 of accumulator 125 and oil feed pump 128 coaxial combination on same pump case 129 of promoting the oil of accumulator 125 and supplying to each lubricated portion of motor E constitutes by the oil with crankshaft room's 124 1 sides.

Above-mentioned pump case 129, for on the lower inner face of the left side half chests body 19 of the crankcase 14 in the place ahead of bent axle 12, the the 1st～the 3rd overlapped box component 131,132,133 linked together be connected to form, running shaft 134 with axis parallel with bent axle 12, make its part outstanding, by the 1st～the 3rd box component 131～133 free rotary ground supportings from the 3rd box component 133.

On the protuberance of giving prominence to from the 3rd box component 133 of above-mentioned running shaft 134, fixing driven gear 135.In addition,, fixing the actuation gear 136 with driving

sprocket wheel

44F, 44R one, with the intermediate gear 137 and above-mentioned driven gear 135 engagements of actuation gear 135 engagements in the other end of bent axle 12.Therefore, the rotating power of bent axle 12 just is delivered to the running shaft 134 of oil pump 126 by actuation gear 136, intermediate gear 137 and driven gear 135.

But above-mentioned intermediate gear 137 is fixed on the running shaft 139 of the water pump 138 that is installed on the starboard engine cowling 47, and the rotating power of bent axle 12 transmits to oil pump 126, also is delivered to water pump 138 simultaneously.

Dump pump 127 is a roulette pump, has at the external gear 141 that is fixed on the internal gear 140 on the running shaft 134 between the 2nd and the 3rd box component 132,133 and meshes with internal gear 140 between the 2nd and the 3rd box component 132,133.

And, oil feed pump 128 is similarly roulette pump with dump pump 127, has at the external gear 143 that is fixed on the internal gear 142 on the running shaft 134 between the 1st and the 2nd box component 131,132 and meshes with internal gear 142 between the 1st and the 2nd box component 131,132.

The exhaust port 144 of above-mentioned dump pump 127 is arranged on the 2nd box component 132, the return tube 145 of oil guiding accumulator 125 1 sides that will discharge from exhaust port 144, in crankshaft room 124, be configured in bent axle 12 below, this return tube 145 with the plane roughly the L type form.

Dump pump 127, in the position configuration that departs from from accumulator 125 with direction along the axis of bent axle 12, the plane roughly is an end of the return tube 145 of L type, liquid is close and can insert and break away from ground and insert on the 2nd box component 132 of pump case 129 of dump pump 127, and the other end of return tube 145 be attached between zoning crankshaft room 124 and the accumulator 125, be arranged on the dividing plate 14b of crankcase 14.

Promptly, on an end periphery of return tube 145, one is outstanding to be provided with the circular protrusion 145a that the O RunddichtringO 171 of an end that prevents to be installed in return tube 145 comes off, one end of return tube 145 is close and can insert and break away from ground and insert on the 2nd box component 132 by O RunddichtringO 171 liquid, like this, an end of return tube 145 thickly is connected on the above-mentioned exhaust port 144 by liquid.

And, in the other end of return tube 145, to fix along the mounting plate 146 of the radial direction direction stretching, extension laterally of this return tube 145, the front end bottom of this mounting plate 146 in accumulator 125 is attached on the aforementioned barriers 14b by bolt 147.

On the other end periphery of above-mentioned return tube 145, the also circular protrusion 145b that comes off of the outstanding O RunddichtringO 172 that the other end that prevents to be installed in return tube 145 is being set of one, by above-mentioned mounting plate 146 is attached on the aforementioned barriers 14b, dividing plate 14b is inserted by O RunddichtringO 172 in the other end of return tube 145, is connected to the other end liquid seal of above-mentioned return tube 145 end that is arranged at the Oil Guide path 148 on left side half chests body 19 and the port engine cowling 33.

The other end of above-mentioned Oil Guide path 148, upper opening on the front in accumulator 125, on left side half chests body 19 and port engine cowling 33, the side directed training wall 149 in the oil that will discharge from the other end of Oil Guide path 148 rear one in accumulator 125 is being set.

The suction port 150 of dump pump 127 is arranged on the 3rd box component 133, on pump case 129 and left side half chests body 19 the suction path 151 that communicates with the suction port 150 of dump pump 127 is being set.This sucks path 151 and is communicated with bottom in the crankshaft room 124, by oil cleaner screen 152 be arranged on the left of the path 153 of half chests body 19 and port engine cowling 33 be connected.

Separate suction path 151 and path 153 and insert left side half chests body 19 by oil cleaner screen 152, thickly be installed in mounting spring 155 between lid 154 on the port engine cowling 33 and the above-mentioned oil cleaner screen 152 at liquid, above-mentioned oil cleaner screen 152 is installed on the crankcase 14, is just attracted by dump pump 127 through the oil that oil cleaner screen 152 filters by the bottom in crankshaft room 124.

The suction port 156 of above-mentioned oil feed pump 128 is arranged on the 1st box component 131, is connecting the end of guiding from the suction pipe 157 of the oil of above-mentioned accumulator 125 suctions on this suction port 156.

This suction pipe 157 forms along above-mentioned return tube 145, be configured in simultaneously in the space that surrounds by this return tube 145, one end liquid of suction pipe 157 is close and can insert the 1st box component 131 that inserts the pump case 129 of oil feed pump 128 with breaking away from, and the other end of suction pipe 157 is attached on the dividing plate 14b of crankcase 14.

Promptly, on an end periphery of suction pipe 157, the circular protrusion 157a that the outstanding integratedly O RunddichtringO 173 that an end that prevents to be installed in this suction pipe 157 is being set comes off, one end of suction pipe 157, close and can insert and break away from ground and insert the 1st box component 131 by O RunddichtringO 173 liquid, by like this, an end of suction pipe 157 thickly is connected on the above-mentioned suction port 156 by liquid.

And, fixing the mounting plate 158 that stretches laterally along the radial direction of suction pipe 157 in the other end of suction pipe 157, this mounting plate 158 is attached on the aforementioned barriers 14b by bolt 159 in return tube 145 the place ahead to the joint of aforementioned barriers 14b.

On the periphery of the other end of above-mentioned suction pipe 157, the also circular protrusion 157b that comes off of the outstanding O RunddichtringO 174 that the other end that prevents to be installed in this suction pipe 157 is being set of one, by above-mentioned mounting plate 158 is attached on the aforementioned barriers 14b, thickly insert among the dividing plate 14b by O RunddichtringO 174 liquid the other end of suction pipe 157, and the other end of above-mentioned suction pipe 157 thickly is connected on the path 160 that is arranged on left side half chests body 19 and the port engine cowling 33 by oil cleaner screen 161 liquid.

Above-mentioned path 160, in above-mentioned return tube 145 the place ahead to the joint of aforementioned barriers 14b, communicate with bottom in the accumulator 125 and be arranged on left side half chests body 19 and the port engine cowling 33, separate the other end and the path 160 of suction pipe 157 and insert left side half chests body 19 by oil cleaner screen 161, mounting spring 162 between port engine cowling 33 and above-mentioned oil cleaner screen 152, just be communicated with bottom in the accumulator 125 to the place ahead of the joint of aforementioned barriers 14b with this above-mentioned oil cleaner screen 161, and be arranged on the crankcase 14 at return tube 145.Like this, the oil that filters by the bottom in accumulator 125, process oil cleaner screen 161 is attracted by oil feed pump 128.

The exhaust port 163 of above-mentioned oil feed pump 128 is arranged on the 1st box component 131, and this exhaust port 163 is connected by the interior check valve 164 that is contained in the 1st box component 131 on the path 165 on the left side half chests body 19 that is arranged on crankcase 14.And the front end bottom of above-mentioned left side half chests body 19 oil cooler 166 is installed and this oil cooler 166 is clipped in and above-mentioned left side half chests body 19 between oil purifier 167, above-mentioned path 165 is connected on the oil purifier 167 by oil cooler 166.

In addition, be used for being arranged on engine main body 13 to the oily path 168 of the lubricated portion fuel feeding of valve device 45F, the 45R etc. of the left side of crankcase 14 and right

hand crankshaft collar

22,23 and front and

rear cylinder head

16F, 16R, the oil that was purified by above-mentioned oil purifier 167 is imported in this oil path 168.And, be set on the left side half chests body 19 between the reduction valve 169 between above-mentioned oily path 168 and the accumulator 125 in part by oil cooler 166.

The following describes this embodiment's effect, though in the outside of bent axle 12 at the 1st counter weight 24 that disposes along its axial end, between the drive belt wheel shaft 62 of bent axle 12 and stepless speed variator 53, driving gear row 70 are being set, and the generator 30 in the outside that is positioned at driving gear row 70 is installed at an end of bent axle 12, but see the intermediate portion that the part of drive pulley 64 is configured in the drive belt wheel shaft 62 of the position that overlaps with generator 30 from the side, be set at intermediate bearing portion 68 free rotary ground supportings on the crankcase 14, the part of intermediate bearing portion 68 forms with the shape along the track of the periphery of the 1st and the 2nd counter weight 25 of bent axle 12.

And bent axle 12, in the outside of the 2nd counter weight 25 of the other end axial configuration along it, be fixed on driving sprocket wheel 44F, the 44R on the bent axle 12 and hanging up

cam chain

46F, 46R, but the pulley driving device 86 that formation is fixed on the movable belt pulley 85 of driving side of driving side fast pulley 84 on the drive belt wheel shaft 62 and drive pulley 64, slides and drive along drive belt wheel shaft 63, along the axial arrangement of bent axle 12 with above-mentioned driving sprocket wheel 44F, position that 44R is corresponding.

Therefore, drive pulley 64 is seen its part from the side with generator 30 overlap, near bent axle 12, its result can shorten the front and back length of power plant P, and then shortens wheelbase.

And because on the crankcase 14 in the outside of driving gear row 70, one distolateral bearing portion 67 of one end of free rotary ground supporting drive belt wheel shaft 62 is being set, so can pass through at the both sides of driving gear row 70 dual-supporting drive belt wheel shaft 62, can alleviate the load of intermediate bearing portion 68, can make 68 miniaturizations as far as possible of intermediate bearing portion, make drive belt wheel shaft 68 more near the 2nd counter weight 25 1 sides, can further shorten the front and back length of power plant P, further shorten wheelbase.

And since on crankcase 14 in conjunction with before and after front and rear cylinder block 15F, the 15R of V-shaped configuration, rear portion cylinder block 15R is in the end deflection configuration of the axis from anterior cylinder block 15F along bent axle 12, so space that can utilize the rear of anterior cylinder block 15F to generate, make belt type continuously variable transmission 53 more near engine center C, can be with power plant P in its width direction miniaturization.

And the speed changer chamber 60 that will take in belt type continuously variable transmission 53 combines with crankcase 14 with the gearbox casing 56 that crankcase 14 interior zonings form, on the outer side surface of the right side of gearbox casing 56 casing 58, formation is covered drive pulley 64 and a plurality of open-works 115 that are communicated with in the speed changer chamber 60 is being set ... the 58a of low level portion and cover driven pulley 65, than the 58a of low level portion swell laterally and with the back-connected high-order 58b of portion of the 58a of low level portion, with the 58a of low level portion between form and to be communicated with above-mentioned each open-work 115 ... the time import path 117 near the air of the front end opening of the high-order 58b of portion air import cover 116 and cover the 58a of low level portion, and be installed on the right side casing 58 of gearbox casing 56.

Therefore, can utilize air to import and cover in the dust intrusion speed changer chambers 60 that as far as possible stop from front-wheel WF 116, and in speed changer chamber 60, import the air of cooling usefulness, and cover the 58a of low level portion in the outer surface of gearbox casing 56, so can not import cover 116 power plant P is maximized on its width direction owing to air is installed on the right side of gearbox casing 56 casing 58 because air imports cover 116.

In crankcase 14, the mutual zonings of accumulator 125 of accommodating the most crankshaft room 124 of bent axle 12 and being configured in the rear of bent axle 12 form, be used for the bottom that dump pump 127 that oil with crankshaft room's 124 1 sides turns back to accumulator 125 is installed in the crankcase 14 in bent axle 12 the place aheads, will be configured in the below of crankshaft room's 124 inside crankshafts 12 to accumulator 125 1 side directed return tubes 145 from the oil that dump pump 127 is discharged.

Therefore, being installed between accumulator and the crankshaft room structure on the generator crankcase with dump pump compares, the volume of accumulator 125 can be expanded to bent axle 12 1 sides, and because return tube 145 is configured in the below of crankshaft room's 124 inside crankshafts 12, so can avoid crankcase 14 to reach below and rear, can fully guarantee the volume of accumulator 125.

And, dump pump 127 is in the position configuration that departs from from above-mentioned accumulator 125 with the direction along the axis of bent axle 12, the plane is a roughly end of the above-mentioned return tube 145 of L type formation, liquid is close and can insert the pump case 129 that breaks away from ground insertion dump pump 127, the other end of return tube 145, be attached on the dividing plate 14b between accumulator 125 and the crankshaft room 124, so return tube 145 is easy to the assembling of crankcase 14, and owing to do not need assembling to use part in an end of return tube 145, so can reduce number of spare parts.

And, promote the oil of accumulator 125 and

oil feed pump

128 and 127 shared pump case 129 and the coaxial combinations of supplying with to each lubricated portion of above-mentioned dump pump, the suction pipe 157 that will guide to oil feed pump 128 from the oil that accumulator 125 sucks forms along return tube 145, be configured in simultaneously in the space that dump pump 145 surrounds, so can constitute dump pump 127 and oil feed pump 128 compactly, and can obtain the volume of accumulator 125 and guarantee the length of suction pipe 157, and can improve the assembly performance of suction pipe 157.

And the other end of return tube 145, be connected on the aforementioned barriers 14b of the front end bottom in the accumulator 125, one end is connected the other end of the above-mentioned suction pipe 157 on the oil feed pump 128, be communicated with bottom in the accumulator 125 to the place ahead of the joint of aforementioned barriers 14b at dump pump 145, and be connected with oil cleaner screen 161 on being arranged on above-mentioned crankcase 14.

Therefore can shorten from accumulator 125 to oil feed pump 128 oily path, improve the pump efficiency of oil feed pump 128, and because only the part of the height till the oil level in 125 acts on oil pressure at oil cleaner screen 161 from oil cleaner screen 161 to accumulator, so can reduce from oil cleaner screen 161 through the hydraulic slip of suction pipe 157 to the oil circuit of oil feed pump 128.

Embodiments of the invention have been described above, but the present invention is not limited to the foregoing description, can break away from the scope of technical conceive of the present invention, can carry out various design alterations.

For example, in the above-described embodiments, a though end of return tube 145, on the liquid pump case 129 close and insertion dump pump 127 with can inserting disengaging, and the other end of return tube 145 is attached on the dividing plate 14b, but an end of return tube 145 is also can liquid close and can insert and break away from ground and insert on the dividing plate 14b, and the other end of return tube 145 is attached on the pump case 129.

In addition, the present invention also can be suitable for automatic three-wheel vehicular engine.

(invention effect)

As mentioned above, according to the present invention 1, the volume of accumulator can be expanded to bent axle one side, can avoid crankcase to reach the rear downwards and stretch out, and can fully guarantee the volume of accumulator.

In addition, according to the present invention 2, easily return tube is assembled on the crankcase, and, owing to do not need assembling not use parts, so can reduce component number in a tip side of return tube.

According to the present invention 3, when can constitute dump pump and oil feed pump compactly, not only can reduce the volume of accumulator as far as possible but also can guarantee the length of suction pipe, and also can improve the assembling performance of suction pipe.

And, according to the present invention 4, can shorten the oily path from the accumulator to the oil feed pump and improve the pump efficiency of oil feed pump, and, can suppress from oil cleaner screen through the hydraulic slip of suction pipe to the path of oil feed pump.

Claims

1. the oily loop structure of automatic two, a three-wheel vehicular engine, it is characterized in that: be in crankcase (14), forming to zoning the accumulator (125) of taking in the most crankshaft room (124) of bent axle (12) and being configured in the rear side of above-mentioned bent axle (12) mutually, and in crankcase (14), install in automatic two, the three-wheel vehicular engine of dump pump (127) that oil with above-mentioned crankshaft room (124) one sides turns back to above-mentioned accumulator (125)

Above-mentioned dump pump (127) is installed in the bottom of crankcase (14) in the place ahead of above-mentioned bent axle (12), the return tube (145) of above-mentioned accumulator (125) one sides that will lead from the oil that above-mentioned dump pump (127) is discharged is configured in the below of above-mentioned bent axle (12) in above-mentioned crankshaft room (124).

2. as claimed in claim 1 automatic two, the oily loop structure of three-wheel vehicular engine, it is characterized in that: above-mentioned dump pump (127), along being configured on the position of departing from accumulator (125) on the direction of the axis of above-mentioned bent axle (12), overlook an end of the above-mentioned return tube (145) that slightly is the L font, close and can insert and break away from ground and insert on the pump case (129) of above-mentioned dump pump (127) and the dividing plate (14b) between above-mentioned accumulator (125) and above-mentioned crankshaft room (124) one by liquid, the other end of above-mentioned return tube (145) is fastened on another of above-mentioned pump case (129) and aforementioned barriers (14b).

3. the oily loop structure of automatic two, three-wheel vehicular engine as claimed in claim 2, it is characterized in that: shared above-mentioned pump case (129), coaxial oil feed pump (128) and the above-mentioned dump pump of supplying with to each lubricated portion in conjunction with the oil that promotes above-mentioned accumulator (125) (127), the suction pipe (157) that will import above-mentioned oil feed pump (128) from the oil that above-mentioned accumulator (125) sucks forms and is configured in the space that above-mentioned return tube (145) surrounded along above-mentioned return tube (145).

4. the oily loop structure of automatic two, three-wheel vehicular engine as claimed in claim 3, it is characterized in that: the forward end bottom of above-mentioned return tube (145) in above-mentioned accumulator (125) is connected on the aforementioned barriers (14b), one end is connected the other end of the above-mentioned suction pipe (157) on the above-mentioned oil feed pump (127), be communicated with bottom in the above-mentioned accumulator (125) in the place ahead of the joint of the aforementioned barriers (14b) of above-mentioned return tube (145), and be connected with oil cleaner screen (161) on being equipped on above-mentioned crankcase (14).