CN1178287A - Fluid pump structure of IC engine - Google Patents

Abstract

The present invention provides a fluid pump structure on an internal combustion engine and having high sealing property. A cooling water pump casing 9 having magnetism transmitting property is fixed to an internal combustion engine main body 4, a driven sprocket 71 to be rotated and driven by being interlocked with the operation of an overhead valve-type four-stroke single cylinder internal combustion engine is rotatably and loosely fitted on the outer periphery of a rotor housing part 63 of the cooling water pump casing 9, a casing of a cooling water pump 73 is constituted of a partition member 7 to be brought in contact with the opening outer periphery of the cooling water pump casing 9, and the rotor housing part 63 of the cooling water pump casing 9, an impeller 67 and a pump rotary shaft 66 are rotatably supported in the casing, and a plurality of pairs of permanent magnets 68, 72 whose N poles and S poles are alternately arranged in the circumferential direction are integrally provided on the outer peripheral surface of the impeller 67 and the inner peripheral surface of the driven sprocket 71.

Description

The fluid pump structure of internal-combustion engine

The present invention relates to be attached to the high fluid pump structure of sealing of internal-combustion engine, particularly relate to cooling waterpump.

Be attached to the cooling waterpump or the lubricated axle pump of internal-combustion engine, constitute with internal combustion engine main body split ground, this pump live axle mainly is arranged in the crankcase highlightedly, the bent axle etc. that is installed in gear on this pump live axle or sprocket wheel and internal-combustion engine connects (for example, disclosing clear 56-28209 communique with reference to Japan Patent) mutually.

Cooling waterpump and radiator and internal-combustion engine branch are arranged in addition, and these cooling waterpumps and radiator and internal-combustion engine connect with flexible tubes such as flexible pipes, thereby constitute cooling water circulation loop.

For the fluid pump of above-mentioned prior art,,, make the fluid in the pump case can not pass through the swivel bearing part of pump live axle to external leaks so be necessary to be provided with mechanical seal because the pump live axle runs through pump case.

If this mechanical seal is set, then in order to ensure sealing will extend the pump live axle, increase part number and amount of finish, owing to the friction of sealed department produces power loss, and be under the occasion of cooling water at fluid, owing to wearing and tearing, reason such as aging, also must be provided with the vent pathway that produces under the small leakage occasion towards the outside.

And for the internal-combustion engine of split outfit radiator, not only part number significantly increases, and cost uprises, and the connection operation and the Maintenance and Repair of flexible tube are miscellaneous, and internal-combustion engine and the maximization unavoidably on the whole of these subsidiary components.

The present invention makes for the problem that solves above-mentioned prior art existence, its objective is on improved basis fluid pump structure in the internal-combustion engine and cooling structure, provide a kind of sealability high, can make designs simplification, can make fluid pump in its miniaturization and the internal-combustion engine that can reduce cost.It is provided in a side of in the internal-combustion engine, it is characterized in that: it is to have end hollow protruding member to be fixed on the body of above-mentioned internal-combustion engine magnetic permeability, the rotary driving physical efficiency that running with above-mentioned internal-combustion engine is driven in rotation is in linkage rotated sliding fit freely on the above-mentioned periphery that end hollow protruding member arranged, and has end hollow protruding member to constitute the housing of fluid pump by the seal structure body that contacts with the above-mentioned opening peripheral part that end hollow protruding member arranged and this; Impeller and impeller rotating shaft and above-mentioned rotary driving body are rotated in the housing that is bearing in this fluid pump freely with one heart, along the circumferential direction alternately arranging the many of N, the S utmost point to magnet, clipping above-mentioned magnetic permeability has the perisporium of end hollow protruding member, is arranged on perimembranous in the rotating center hole of above-mentioned rotary driving body with being integral respectively and is positioned near the peripheral part of the above-mentioned impeller rotating shaft the center of this rotary driving body.

The present invention, owing to constitute as described above, so when above-mentioned internal-combustion engine entry into service, when above-mentioned rotary driving body rotation is driven, produce rotating magnetic field by the magnet on the perimembranous in the rotating center hole that is arranged on this rotary driving body, this rotating magnetic field sees through above-mentioned magnetic permeability end hollow protruding member, reach impeller rotating shaft all-in-one-piece magnet with fluid pump, the magnet of this impeller rotating shaft also is driven in rotation, its result, the impeller of fluid pump also is driven in rotation, and makes fluid pump become working state.

And, in the present invention, because the impeller rotating shaft of above-mentioned fluid pump does not run through above-mentioned have end hollow protruding member and seal structure body, but can rotate the inboard that is bearing in them freely, so the sealing configuration of above-mentioned impeller rotating shaft there is no need fully, can make the shorten length of impeller rotating shaft, can make above-mentioned fluid pump small-sized, lightweight, and structure can be simplified, can reduce cost, can also obtain the complete seal structure of above-mentioned fluid pump, though in the fluid pump loop by obturation, under the state that impeller can not rotate, above-mentioned rotary driving body also can rotate, and can prevent that very big masterpiece is used in the pump driving and fastens.

Owing to the present invention is made structure as claim 2 or claim 3 record, so can obtain water tightness or high cooling waterpump or the lubricating pump of oil-tightness.

Owing to the present invention constituted as claim 4 puts down in writing,, can utilize the part of the power that the valve power train transmitted to drive above-mentioned fluid pump so do not need special power unloading device.

Also because the present invention is constituted as claim 5 record, so do not need the sealing configuration of impeller rotating shaft fully, just can make the structure of sealing fully to fluid pump, and can be by valve power train driven fluid pump, and not influenced by flexible driving band, just can carry out easily and positively above-mentioned fluid pump maintenance, check, reorganize and outfit.

Because the present invention is constituted as claim 6 record, so can be connected in series lubricating pump and cooling waterpump in the bottom of internal-combustion engine, these two pumps are turned round simultaneously, and the lubricant oil in these two pumps is separated fully with cooling water, positively prevent both mixing.

In addition, because the present invention is constituted as claim 7 record, so the ignition heat that is produced in the firing chamber in cylinder is taken away by the cooling water that flows in the water jacket in its vicinity, the firing chamber can be cooled to suitable temperature, and the cooling water that is subjected to ignition heat heating with internal-combustion engine all-in-one-piece radiator in be cooled, can chilled cooling water be sent in the above-mentioned water jacket once more by cooling waterpump.

Require in the inventions of 8 records at aforesaid right, because above-mentioned radiator and internal-combustion engine are arranged to one,, and can constitute compactly, can make that internal-combustion engine is small-sized, lightweight and reducing cost so can make the cooling structure simplification of internal-combustion engine.

Because the present invention is constituted as claim 9 record, so the heat that can make the cooling water that is heated by the burning in the above-mentioned firing chamber is absorbed by the endothermic plate of above-mentioned fin radiator portion, after the heat heat that endothermic plate is absorbed is delivered to radiating fin, can to atmosphere, dispel the heat from this radiating fin heat, even do not have the radiator of prior art, also can obtain the cooling performance internal-combustion engine also higher than air-cooled internal combustion engine.

Because the present invention is constituted as claim 8 record, so heat of the cooling water that heats by the burning in the above-mentioned firing chamber, can be absorbed into the cooling water heat absorption path peripheral part of above-mentioned path fin radiator portion, after the heat heat that the water heat absorption path peripheral part that is cooled is absorbed is delivered to radiating fin, can to atmosphere, dispel the heat from this radiating fin heat, thereby can improve the cooling performance of internal-combustion engine.

Fig. 1 is the left side view of the internal-combustion engine that is associated with one embodiment of the present invention.

Fig. 2 is the right side view of Fig. 1.

Fig. 3 is the vertical profile plan view that the III-III line along Fig. 1 dissects.

Fig. 4 is the vertical profile side view that the IV-IV line along Fig. 3 dissects.

Fig. 5 is that V-V along Fig. 3 is to view.

Fig. 6 is the right side view of the internal combustion engine main body of the internal-combustion engine shown in Fig. 1.

Fig. 7 is the crosscut rear view that the VII-VII line along Fig. 1, Fig. 2, Fig. 4 and Fig. 5 dissects.

Fig. 8 is the sectional elevation that the VIII-VIII line along Fig. 1, Fig. 2, Fig. 4 and Fig. 5 dissects.

Fig. 9 is that IX-IX along Fig. 8 is to view.

Figure 10 is that X-X along Fig. 3 is to view.

Figure 11 is that XI-XI along Fig. 3 is to view, if this left cap member 8 is contained in with spinning upside down on the insulating element 7 of Figure 10, just become state shown in Figure 1.

Figure 12 is that XII-XII along Fig. 3 is to view.

Figure 13 is that the vertical profile of another embodiment of the present invention is bowed and executed view.

Figure 14 is that XIV-XIV along Figure 13 is to view.

Figure 15 is the vertical profile plan view of another embodiment of the invention.

The explanation of symbol: 1-Overhead valve formula four-cycle, single-cylinder internal-combustion engine, 2-left crankcase, the right-hand crankcase of 3-, the 4-internal combustion engine main body, 5-cylinder head cover, 6-right cap member, the 7-insulating element, 8-left cap member, 9-cooling waterpump housing, the 10-casing bore, 11-piston, 12-left bent axle, the right-hand bent axle of 13-, 14-bearing, 15-crank pin, the 16-wrist pin, 17-connecting rod, 18-suction port, the 19-exhaust port, 20-sucking pipe, 21-Carburetor, the 22-intake valve, 23-exhaust valve, 24-valve device, the 25-bearing, 26-camshaft, 27-intake cam, the 28-exhaust cam, 29-valve spring, 30-cotter seat, the 31-valve tappet, 32-drive sprocket, 33-driven sprocket, the 34-closed chain, 35-idler sprockets, 36-spark plug, the 37-water jacket, the 38-cooling water flows into path, 39-cooling water drain passageway, 40-cooling water heat absorption path, 41-radiating fin, 42-recess, the 43-radiating fin, 44-heat absorption ditch portion, 45-radiating fin, 46-path fin radiator portion, 47-annular protuberance, 48-intercommunicating pore, 49-bolt, the 50-spiral type is discharged recess, the 51-impeller is accommodated recess, 52-circular arc inlet hole, 52-recess, the 54-recess, the 55-intercommunicating pore, 56-endothermic plate, 57-radiating fin, 58-sucks recess, the 59-endothermic plate, 60-cooling water injection portion, 61-intercommunicating pore, the 62-radiating fin, 63-rotor accommodation section, 64-axle supporting blind hole, 65, axle supporting blind hole, 66-pump running shaft, 67-impeller, 68-permanent magnet, 69-bearing cooperating recesses, the 70-bearing, 71-driven sprocket, 72-permanent magnet, the 73-cooling waterpump, 74-starter motor driven sprocket, 75-actuating motor, 76-closed chain, the 77-lubricating pump, the 78-generator, 79-fin radiator portion, 80-fin radiator portion, the 81-bent axle, the 82-drive sprocket, 83-running shaft, 84-driven sprocket, the 85-closed chain, the 86-cylindrical body.

The following describes Fig. 1 to one embodiment of the present invention shown in Figure 12.

Overhead valve formula four-cycle, single-cylinder internal-combustion engine 1 with fluid pump structure of the present invention, state with cylinder-head cover 5 and casing bore 10 cardinal principle directed forward substantially horizontals is installed on the vehicle frame that does not draw on the figure of motorcycle, in this Overhead valve formula four-cycle, single-cylinder internal-combustion engine 1, in the place ahead of left crankcase 2 of dividing right and left and right-hand crankcase 3, in turn the internal combustion engine main body 4 and cylinder-head cover 5 overlapping the landing of cylinder block and cylinder head composition one are combined into one.

In addition, in the casing bore 10 that on internal combustion engine main body 4, forms, can cooperate piston 11 sliding freely in front and back, simultaneously in above-mentioned left crankcase 2, right-hand crankcase 3, ground axle suspension be can rotate freely through bearing 14 and left bent axle 12 and right-hand bent axle 13, this left bent axle 12 and right-hand bent axle 13 mutually combine by crank pin 15 and are integral, the two ends of connecting rod 17 can rotate and be matched with wrist pin 16 (with reference to Fig. 4) and the above-mentioned crank pin 15 that is set in 11 li in above-mentioned piston freely, along with the lifting of piston 11, left bent axle 12 and right-hand bent axle 13 are driven in rotation.

In addition, on internal combustion engine main body 4, formation is opened on the suction port 18 and the exhaust port 19 that is opened on the top, right side of casing bore 10 of the left side top of casing bore 10, this suction port 18 points to oblique upper, Carburetor 21 is connected its front end through sucking pipe 20, above-mentioned exhaust port 19 as shown in Figure 3, is connected on the figure on the unillustrated outlet pipe to right-hand bending.

Casing bore 10 sides at suction port 18 and exhaust port 19 are provided with intake valve 22 and exhaust valve 23 respectively, and this intake valve 22 and exhaust valve 23 are opened and closed once at left bent axle 12 and right-hand bent axle 13 revolutions 2 circles with predetermined timing by valve device 24 driven for opening and closing.

In other words, valve device 24 is made up of following member, promptly by, parallel with left bent axle 12 with right-hand bent axle 13, can rotate the earth's axis freely through bearing 25 and be bearing in camshaft 26 on internal combustion engine main body 4 and the cylinder-head cover 5; Be positioned on the center line of above-mentioned intake valve 22 and exhaust valve 23, be integrally formed in intake cam 27 and exhaust cam 28 on the above-mentioned camshaft 26 respectively; With above-mentioned intake valve 22 and exhaust valve 23 bullets valve spring 29 to normally closed direction; Be attached to the cotter seat 30 on the top of above-mentioned intake valve 29 and exhaust valve 23; The valve tappet 31 that intake cam 27 and exhaust cam 28 are being assigned; Integrally be arranged on the drive sprocket 32 of the bent axle 12 of left; Have 2 times of numbers of teeth of this drive sprocket 32, integrally be installed in the driven sprocket 33 of the left end of camshaft 26; Hang over the non-joint closed chain 34 on this drive sprocket 32 and the driven sprocket 38; And the up and down a pair of tensioning mechanism idler sprockets 35 that this non-joint closed chain 34 is applied tension force.

Be positioned in the middle of intake valve 22 and the exhaust valve 23, highlightedly dismantledly, spark plug 36 is installed in internal combustion engine main body 4 to casing bore 10.

In addition, on internal combustion engine main body 4, near the periphery of the top of casing bore 10, form water jacket 37, form simultaneously be communicated with this water jacket 37 and also opening at the cooling water inflow path 38 of the left bottom of internal combustion engine main body 4, and be communicated with this water jacket 37 and opening at the cooling water drain passageway 39 on the right-hand top of internal combustion engine main body 4; Be positioned at the top of this water jacket 37 and cooling water drain passageway 39, substantially point to above-below direction flat cooling water heat absorption path 40, form a plurality ofly across ground, front and back, point to the radiating fin 41 of tiltedly going up the place ahead to the top of this cooling water heat absorption path 40 and form a plurality of across ground, front and back.

On the watertight ground, right-end openings place of the opening of the cooling water drain passageway 39 on the right side that is positioned at internal combustion engine main body 4 and cooling water heat absorption path 40 and integrally adorning right cap member 6, cooling water drain passageway 39 and cooling water heat absorption path 40 are communicated with by the recess 42 of this right cap member 6, foreign side top at this right cap member 6, the radiating fin 43 that points to fore-and-aft direction substantially is a plurality of across forming up and down, be positioned at the below of this radiating fin 43 simultaneously, form inner two radiating fin 45 that have heat absorption ditch portion 44 abreast, constitute path fin radiator portion 46 by these cooling water heat absorption paths 40 and radiating fin 41.

Also the cooling water below the left side that is positioned at internal combustion engine main body 4 flows into the opening of path 38, watertight ground is cooperating aluminium or resin and so on that the annular protuberance 47 of the cooling waterpump housing 9 of magnetic permeability is arranged, simultaneously the left surface of this cooling waterpump housing 9 by the bolt watertight that does not draw among the figure be installed on the right flank of insulating element 7, and on the left surface of insulating element 7 by bolt 49 (with reference to Fig. 8) watertight the right flank of left cap member 8 is installed.

In addition, as shown in figure 12, bottom at the right flank of insulating element 7, form spiral type and discharge recess 50, the rear end that this spiral type is discharged recess 50 is connected with the intercommunicating pore 48 that the cooling water of internal combustion engine main body 4 flows into path 38 and cooling waterpump housing 9, discharge the flexural center formation impeller of recess 50 at this spiral type and accommodate recess 51, form three the circular arc inlet holes 52 along the circumferential direction arranging be connected with the left surface of insulating element 7 simultaneously, form the intercommunicating pore 55 that the cooling water of internal combustion engine main body 4 is absorbed heat the airtight recess 53 in the left part of path 40 and is connected with the recess 54 of the left surface of insulating element 7 on the top of the right flank of insulating element 7.

As shown in figure 10, rear portion at the left surface of insulating element 7, the endothermic plate 56 that points to above-below direction substantially forms a plurality of across fore-and-aft direction ground, and before and after it, the radiating fin 57 that points to fore-and-aft direction substantially is a plurality of across the formation of above-below direction ground, constitutes fin radiator portion 79 by this endothermic plate 56 and radiating fin 57.

And for example shown in Figure 11, form in the bottom (becoming top among Figure 11) of the right flank of left cap member 8 and to suck recess 58, the endothermic plate 59 that points to above-below direction above it substantially is positioned at the centre that above-mentioned adjacent spiral type is discharged recess 50, form a plurality of across fore-and-aft direction ground, the intercommunicating pore 61 that is connected with formed cooling water injection portion 60 is set in the upper end of left cap member 8, as shown in figure 11, on the left surface of left cap member 8, the radiating fin 62 that points to fore-and-aft direction substantially is a plurality of across the formation of above-below direction ground, constitutes fin radiator portion 80 by this endothermic plate 59 and radiating fin 62.

Then, as shown in Figure 8, in cooling waterpump housing 9, accommodate the right-hand of recess 51 at the impeller of insulating element 7, form rotor accommodation section 63, right flank at insulating element 7, form axle supporting blind hole 64 at the configuration center place of three circular arc inlet holes 52, simultaneously therein on the right-hand elongation line of heart line, form an axle supporting blind hole 65 at the place, bottom surface of the rotor accommodation section 63 of cooling waterpump housing 9, the two ends of pump running shaft 66 can rotate and be matched with this two axle supporting blind holes 64 freely, in 65, impeller 67 stationary fit integrally is on this pump running shaft 66, in the periphery of the axial region impeller 67a of this impeller 67, fixing and along the circumferential direction alternately arranging N, a plurality of permanent magnets 68 of the S utmost point.

And, as shown in Figure 8, with coaxial with the rotor accommodation section 63 of cooling waterpump housing 9, and be positioned at radial direction foreign side ground, this is stopped and forms bearing cooperating recesses 69 in 4 at internal-combustion engine, driven sprocket 71 can rotate through bearing 70 and be bearing in 69 li of this bearing cooperating recesses freely, in the interior week of this driven sprocket 71, fixing and along the circumferential direction alternately arranging N, the S utmost point with the identical permanent magnet 72 of above-mentioned permanent magnet 68 quantity, above-mentioned driven sprocket 71 is meshed with above-mentioned non-joint closed chain 34, rotor accommodation section 63 by cooling waterpump housing 9, pump running shaft 66, impeller 67, permanent magnet 68, bearing cooperating recesses 69, driven sprocket 71 and permanent magnet 72 constitute cooling waterpump 73, when the operation by Overhead valve four-cycle, single-cylinder internal-combustion engine 1 is passed on non-joint closed chain 34, then driven sprocket 71 is driven in rotation, by means of and driven sprocket 71 all-in-one-piece permanent magnets 72 and and impeller 67 all-in-one-piece permanent magnets 68 between the magnetic force that works, make permanent magnet 68 rotations, thereby drive cooling waterpump 73.

In addition, as shown in Figure 3,74 stationary fits of starter motor driven sprocket are on left bent axle 12, as shown in Figure 2, hang non-joint closed chain 76 on the driven sprocket 74 of the drive sprocket of actuating motor 75 (not drawing among the figure) and this starter motor 75, starting Overhead valve formula four-cycle, single-cylinder internal-combustion engine 1 by the rotation of actuating motor 75.

In left crankcase 2, right-hand crankcase 3, lubricating pump 77 is being set as illustrated in fig. 2, when 1 operation of Overhead valve formula four-cycle, single-cylinder internal-combustion engine, lubricating pump 77 just is driven with its interlock.

In addition, 78 be motor among the figure.

Fig. 1 is to mode of execution shown in Figure 12, owing to constitute as described above, so when making 1 starting of Overhead valve formula four-cycle, single-cylinder internal-combustion engine by actuating motor 75, just driven sprocket 71 rotations are driven, thereby make cooling waterpump 73 become working state by passing on of non-joint closed chain 34.

Then, when cooling waterpump 73 becomes working state, then as shown in Figure 7, by the cooling water in the space that left surface and right flank surrounded of insulating element 7, from the suction recess 58 of left cap member 8, be inhaled into impeller through the circular arc inlet hole 52 of insulating element 7 and accommodate recess 51, discharge by means of discharging recess 50 to spiral type along with the impeller 67 of driven sprocket 71 rotations, discharge the rear end of recess 50 from spiral type, intercommunicating pore 48 and cooling water inflow path 38 through cooling waterpump housing 9 are admitted to water jacket 37, and cool off at the top in countercylinder hole 10.

Be heated to form the cooling water of high temperature by the heat of the combustion gas in the casing bore 10, flow into the cooling water heat absorption path 40 of internal combustion engine main body 4 from the cooling water drain passageway 39 of top, the right side of water jacket 37, through the radiating fin 43 of right cap member 6, the part of the cooling water in the radiating fin 43 contacts and is cooled with radiating fin 45, by the warmed-up right cap member 6 of cooling water, in heat absorption ditch portion 44, the heat radiation of path fin radiator portion 46 places.

Since the cooling water of internal combustion engine main body 4 heat absorption path 40 be flat and have a plurality of, so cooling water by cooling water heat absorption path 40 in during heat absorption fully, cooled off by radiating fin 41 by the periphery of the warmed-up cooling water heat absorption of this cooling water path 40.

Cooling water by cooling water heat absorption path 40, flow into the left side recess 54 of insulating element 7 through intercommunicating pore 55 from the right side recess 53 of insulating element 7, in the folded cooling water path space that becomes of insulating element 7 and left cap member 8, flow downwards, flow into the circular arc inlet hole 52 of insulating element 7 once more from the suction recess 58 of left cap member 8, can in cooling water circulation loop, circulate.

When cooling water flows in the folded cooling water path space that becomes of insulating element 7 and left cap member 8, contact with the endothermic plate 56 of insulating element 7 and the endothermic plate 59 of left cap member 8, heat in the cooling water is absorbed by these endothermic plates 56,59, conduction in insulating element 7, left cap member 8 is respectively dispelled the heat in atmosphere by the radiating fin 57 of insulating element 7 and the radiating fin 62 of left cap member 8.

Like this, at Fig. 1 to the mode of execution shown in Figure 12, the space that is surrounded by internal combustion engine main body 4, right cap member 6, insulating element 7 and left cap member 8 constitutes cooling water circulation loop, owing in this cooling water circulation loop, assigning path fin radiator portion 46 and fin radiator portion 79,80, water absorbs so the ignition heat that takes place in casing bore 10 is cooled, the cooling water that is heated by this ignition heat simultaneously dispels the heat in atmosphere, compare with air-cooled internal combustion engine, can obtain the cooling performance of high level.

Because compare with the mode of the radiator that uses common type, the pipe resistance of cooling water is very little, and the lift difference is also very little, so the needed driving torque of pump is very little, water pump can miniaturization.

Again owing to the path fin radiator portion 46 and the fin radiator portion 79 that assign in the above-mentioned cooling water circulation loop, 80 are assembled on the Overhead valve formula four-cycle, single-cylinder internal-combustion engine 1 with being integral, so comprising the whole Overhead valve formula four-cycle, single-cylinder internal-combustion engine 1 of cooling system can be by small-sized, lightweight, and can make designs simplification, can reduce cost significantly, and owing to do not need the corrugated plate dst radiator of prior art, so be the firm durability that is rich in, can avoid the obstruction that causes of adhering to, even in the many rugged environment of dust, also can obtain stable cooling performance because of dust etc.

In cooling waterpump 73, with impeller 67 all-in-one-piece pump running shafts 66, do not run through impeller 67 airtight insulating element 7 and cooling waterpump housing 9, be bearing in freely on these insulating elements 7, the cooling waterpump housing 9 but can rotate; Driven sprocket 71 is at the outer circumferential side of the rotor accommodation section 63 of cooling waterpump housing 9, can be rotatably freely supported on the bearing cooperating recesses 69 of internal combustion engine main body 4 through bearing 70, by means of with pump running shaft 66 and impeller 67 all-in-one-piece permanent magnets 68, with with the magnetic force of driven sprocket 71 all-in-one-piece permanent magnets 72, the rotation traction traction of the driven sprocket 71 that is driven in rotation by passing on of non-joint closed chain 34 said pump running shaft 66, impeller 67 rotations are driven, the result does not need the mechanical seal of pump running shaft 66 fully, just can obtain the water tightness of high level.

Also owing to do not need the sealing configuration of pump running shaft 66, thereby pump running shaft 66 is very short, and structure can simplify, result, but also miniaturization and and reducing cost.

Though being rotated forcibly by the passing on of non-joint closed chain 34 of valve bandle set 24, driven sprocket 71 driving, but because driven sprocket 71 and impeller 67 are transmission of being carried out moment of torsion by the mutual magnetic force between permanent magnet 68, the permanent magnet 72 indirectly, so even very big resistive torque for example occurs to impeller 67, also can between driven sprocket 71 and impeller 67, produce slide relative, driven sprocket 71 can continue rotation, can not apply very big power to valve bandle set 24.

Be cylinder block owing to internal combustion engine main body 4 again and cylinder head is integrated constitutes, institute is so that simple in structure, and this also can make cost reduce.

Though at Fig. 1 to the mode of execution shown in Figure 12, make the impeller 67 of cooling waterpump 73 rotate the outside that the driven sprocket 71 that drives is configured in non-joint closed chain 34, and the impeller 67 of cooling waterpump 73 is set at the foreign side of driven sprocket 71 and non-joint closed chain 34, but also can image pattern 13 to shown in Figure 14, driven sprocket 71 is configured in the inboard of non-joint closed chain 34, impeller 67 is arranged on the interior side of driven sprocket 71 and non-joint closed chain 34.

Though at Fig. 1 to the mode of execution shown in Figure 12, cooling waterpump 73 and lubricating pump 77 are at different parts and drive through different power trains respectively, but also can be as shown in figure 15, non-joint closed chain 85 hang over bent axle 81 all-in-one-piece drive sprockets 82 and with the running shaft 83 all-in-one-piece driven sprockets 84 of lubricating pump 77 on, end with the running shaft 83 of driven sprocket 84 opposition sides is formed cylindrical body 86, the permanent magnet 72 of along the circumferential direction alternately arranging the N.S utmost point is installed on the inner peripheral surface of this cylindrical body 86 with being integral, the rotor accommodation section 63 of cooling waterpump housing 9 with one heart sliding fit in this cylindrical body 86, in this mode of execution, even cooling waterpump 73 and lubricating pump 77 adjacency on same axis, owing to keep the water tightness of cooling waterpump 73 fully, so also can positively stop mixing of cooling water and lubricant oil.

In addition, can not only be with the water pump drive part, and can be with its configured in one piece in the machine oil chamber interior.

And, also can reduce cost so can simplify the structure of Overhead valve formula four-cycle, single-cylinder internal-combustion engine 1 owing to can utilize the power train of lubricating pump 77 to make cooling horizontally rotate driving.

Claims (9)

1. the fluid pump structure of an internal-combustion engine, it is set in the internal-combustion engine, it is characterized in that:

There is end hollow protruding member to be fixed on the body of above-mentioned internal-combustion engine magnetic permeability;

The rotary driving physical efficiency that is driven in rotation with the running of above-mentioned internal-combustion engine interlock is rotated sliding fit freely on the above-mentioned periphery that end hollow protruding member arranged;

There is end hollow protruding member to constitute the housing of fluid pump by the seal structure body that contacts with the above-mentioned opening peripheral part that end hollow protruding member arranged and this;

Impeller and impeller rotating shaft and above-mentioned rotary driving body are rotated in the housing that is bearing in this fluid pump freely with one heart;

Along the circumferential direction alternately arranging the many of the N.S utmost point to permanent magnet, clipping above-mentioned magnetic permeability has the perisporium of end hollow protruding member, is arranged on perimembranous in the rotating center hole of above-mentioned rotary driving body with being integral respectively and is positioned near the peripheral part of the above-mentioned impeller rotating shaft the center of this rotary driving body.

2. fluid pump structure according to claim 1 is characterized in that, above-mentioned fluid pump is the cooling pump of above-mentioned internal-combustion engine.

3. fluid pump structure according to claim 1 is characterized in that, above-mentioned fluid pump is the lubricated pump of using of above-mentioned internal-combustion engine.

4. according to claim 1 any described fluid pump structure to the claim 3, it is characterized in that above-mentioned rotary driving body is the sprocket wheel that is driven in rotation with the cam chain engagement of valve power train.

5. the fluid pump structure of an internal-combustion engine, it is set in the overhead-cam internal-combustion engine, it is characterized in that:

Flexible driving bands such as the cam chain of connection bent axle and camshaft, toothed timing belt are provided on the outermost sidewall of cylinder,

Fluid pump is configured in the more lateral of above-mentioned flexible driving band,

The rotation that is meshed with this flexible driving band and is driven in rotation is driven the physical efficiency rotation is located at freely on the periphery of above-mentioned fluid pump housing base portion,

With this rotary driving body and with the driven solid of rotation of impeller rotating shaft all-in-one-piece of above-mentioned fluid pump, through above-mentioned fluid pump housing and magnetic couplings;

Passing on of above-mentioned fluid pump and above-mentioned flexible driving band is driven in rotation in linkage.

6. fluid pump structure according to claim 1 is characterized in that, above-mentioned rotary driving body and running shaft in abutting connection with the lubricating pump of the lubricating oil tank configuration of internal-combustion engine bottom are combined into one, and above-mentioned fluid pump is a cooling waterpump.

7. the cooling structure of an internal-combustion engine, it is characterized in that: the cooling waterpump that is driven in rotation with the running of above-mentioned internal-combustion engine interlock is provided near the bottom cylinder, simultaneously radiator portion is positioned near the said cylinder is provided with being integral with above-mentioned internal-combustion engine, this radiator portion is to by near the water jacket this cylinder and heated cooling water cools off, and constitutes cooling water circulation loop by above-mentioned cooling waterpump, water jacket, radiator portion and the cooling water path that they are interconnected.

8. the cooling structure in the internal-combustion engine according to claim 7, it is characterized in that, fin radiator portion is provided in the above-mentioned cooling water circulation loop, is being equipped with in above-mentioned cooling water path outstanding this fin radiator portion inside and outside integrative and carries out the endothermic plate of heat exchange and to the outstanding and radiating fin that carry out heat exchange with atmosphere in the outside of above-mentioned internal-combustion engine with cooling water in the above-mentioned cooling water path.

9. according to the cooling structure in claim 7 or the described internal-combustion engine of claim 8, it is characterized in that, in above-mentioned cooling water circulation loop, setting path fin radiator portion, be equipped with this path fin radiator portion inside and outside integrative and forming cooling water heat absorption path and radiating fin outstanding to the outside of this cooling water heat absorption path, that carry out heat exchange with atmosphere a plurality of, that carry out heat exchange with cooling water near the body the cylinder of above-mentioned internal-combustion engine side by side.

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