CN1970379A - Fuel pump configuration structure for mini motor vechile - Google Patents

Abstract

The invention provides a fuel pump arrangment structure for scooter type vehicle, reducing the height of fuel tank accordingly reducing the height of seat, and ensuring required fuel easily when starting the vehicle. The scooter type vehicle of the invention is provided with an admission box (21) below the seat (72) seating for the seater, the fuel tank (22) is provided on the rear of the admission box (21) and upper of the rear wheel, in which, a fuel sprue (142) is set in the front of upper wall (143) of the fuel tank (22), the fuel pump within the fuel tank (22) is provided on the inclined wall (126) of the rear of the fuel sprue (142) of the fuel tank (22), by the manner of tilting forward seeing from the lateral face.

Description

The fuel pump configuring structure of small motorcycle type with low

Technical field

The present invention relates to the improvement of the fuel pump configuring structure of small motorcycle type with low.

Background technology

As the fuel pump configuring structure of in the past small motorcycle type with low, known have in configuration tanks above the trailing wheel of rear vehicle and fuel pump structure (for example with reference to patent documentation 1) be set in this tanks.

Patent documentation 1: the spy opens the 2005-138712 communique

In Fig. 2 and Fig. 3 of patent documentation 1, configuring goods containing box 6 below the seat 4 of small motorcycle type autobicycle, configuration tanks 28 above the rear of this article container 6 and trailing wheel 8, with the bevelled front 28c of the tanks 28 of the rear adjacent of article container 6 on pump installation portion 28i is set, on this pump installation portion 28i, petrolift 29 is installed.

Petrolift 29 have vertically disposed pump main body 29a and with this pump main body 29a bottom bonded assembly fuel suction portion 29.

In the small motorcycle type autobicycle of above-mentioned document, because petrolift 29 vertically is provided with, so have to use the also long tanks 28 of total length of aspect ratio petrolift 29, its result has the problem that seat height increases.

In addition, for example when small motorcycle type autobicycle starts or when giving it the gun need a large amount of fuel.Because above-mentioned petrolift 29 is in the place ahead of tanks 28 arranged perpendicular, so under the few situation of the residual surplus of tanks 28, accumulate fuel anterior in tanks 28 and move to the tank body rear portion, the intake quantity that petrolift 29 sucks during startup reduces, and is difficult to required fuel is supplied with to driving engine.

Summary of the invention

The object of the present invention is to provide a kind of fuel pump configuring structure of small motorcycle type, reduce height of fuel tank, and then reduce seat height, and required fuel when guaranteeing vehicle launch easily.

In the fuel pump configuring structure of small motorcycle type with low of the present invention, this small motorcycle type with low disposes ingathering chamber below the seat of occupant, above the rear of this ingathering chamber and trailing wheel, dispose tanks, it is characterized in that, upper wall front portion in tanks is provided with the fuel inlet, on the wall at the rear of the fuel inlet of tanks, be seen as the petrolift of in front lower place bevelled mode disposes, being located in the tanks with the side.

By with on the wall at the fuel inlet rear of tanks and the side mode that is seen as the front lower place petrolift is disposed in the tanks, thereby can reduce the height that height of fuel tank reduces the seat, and fuel is when rear view of vehicle moves when vehicle launch, and the component of the oblique back upper place by acting on fuel is picking up fuel easily in the bevelled petrolift of front lower place.

Second aspect present invention, tanks have see the rear portion that makes upper wall or rear wall in the side top to bevelled dip plane, the back lower place, on this dip plane, petrolift is installed.

On bevelled dip plane, the back lower place, petrolift is being installed obliquely, therefore can be being increased the length of petrolift to the front lower place sloping portion to the front lower place.

Third aspect present invention disposes shelf above petrolift.

It act as: shelf are protected petrolift and are prevented article and the petrolift interference.

Fourth aspect present invention makes the filter of being located at the petrolift sucking hole relative with the bottom surface of tanks, and makes the bottom surface along the shape of filter and cave in.

It act as: fuel is accumulated along the shape of filter and cave in the bottom surface that makes tanks, draws this fuel from filter.

Fifth aspect present invention, in the mounting flange portion that is provided on the petrolift being installed on the tanks, overlap with this mounting flange portion and dispose the carriage of ring-type, this carriage is fixed on mounting flange portion on the tanks by link, is formed with to prevent the otch of interfering with the part of petrolift on this carriage.

It act as: when being installed on petrolift on the tanks, the mounting flange portion of configuration petrolift on the dip plane of tanks, overlap with this mounting flange portion and dispose the carriage of ring-type, these mounting flange portions and carriage are fixed on the tanks by link.

By on carriage, forming otch, so under the situation of the carriage that overlaps ring-type in the mounting flange portion, carriage can not interfered with the part of petrolift.

Sixth aspect present invention has formed support on carriage, this support part supports and petrolift bonded assembly cartridge and with petrolift bonded assembly lead at least one side.

It act as: the other support unit that does not need to be used for supporting fuel pipe and at least one side of lead.

Seventh aspect present invention in the mounting flange portion that is provided on the petrolift being installed on the tanks, forms hole portion in this mounting flange portion, by making link connect this hole portion petrolift is installed on the tanks.

It act as: with for example on petrolift, form flange part, the edge butt of the hole portion that makes this flange part and on tanks, offer, the installation method that is installed on the tanks when making another carriage with the flange part butt is compared, and the present invention does not need other carriage.

According to first aspect present invention, owing to the fuel inlet is set in the upper wall front portion of tanks, on the wall at the rear of the fuel inlet of tanks, be seen as the petrolift of in front lower place bevelled mode disposes, being located in the tanks with the side, so can reduce height of fuel tank and then reduce seat height, and when residual fuel amount reduces, even also can utilize fuel in tanks, to move during vehicle launch to rear view of vehicle, thereby fuel can be drawn in the petrolift effectively, and needed fuel can easily guarantee vehicle launch the time.

In second aspect present invention, see that the top at the rear portion that makes upper wall or rear portion is to bevelled dip plane, the back lower place owing on tanks, have the side, and on this dip plane, petrolift is installed, even so be small-sized tanks, also can effectively utilize the space in the tanks, can dispose bigger petrolift, increase fuel flow.

In third aspect present invention,,, prevent article and petrolift interference so can utilize shelf protection petrolift owing to above petrolift, dispose shelf.

In the fourth aspect present invention, owing to make the filter of being located at the petrolift sucking hole relative, and caved in the bottom surface along the shape of filter, so even under a spot of situation of residual fuel amount with the bottom surface of tanks, also can easily suck fuel, can effectively use fuel by petrolift.

In fifth aspect present invention, in the mounting flange portion that is provided on the petrolift being installed on the tanks, overlap with this mounting flange portion and dispose the carriage of ring-type, this carriage is fixed on mounting flange portion on the tanks by link, on this carriage, be formed with and prevent the otch of interfering with the part of petrolift, therefore, when being installed on petrolift on the tanks, for example can be not with a part of interference of petrolift with carriage easily from the axial insertion of link, portion overlaps with mounting flange, and installation can be provided.

In sixth aspect present invention, owing on carriage, formed support, this support part supports and petrolift bonded assembly cartridge and with petrolift bonded assembly lead at least one side, so do not need to be used at least one side's of supporting fuel pipe and lead special support unit, can seek the reduction of part number.

In seventh aspect present invention, because in the mounting flange portion that is provided on the petrolift being installed on the tanks, in this mounting flange portion, form hole portion, and petrolift is installed on the tanks by making link connect this hole portion, so can discard the flange part of for example pushing petrolift it is installed on the other carriage on the tanks, can reduce the part number, cutting down cost.

Description of drawings

Fig. 1 is the lateral plan (first embodiment) that adopts the small motorcycle type with low of fuel pump configuring structure of the present invention;

Fig. 2 is the main portion lateral plan (first embodiment) at the rear portion of expression small motorcycle type with low of the present invention;

Fig. 3 is the main portion planar view (first at the rear portion of expression small motorcycle type with low of the present invention

Embodiment);

Fig. 4 is the main portion section-drawing (first at the rear portion of expression small motorcycle type with low of the present invention

Embodiment);

Fig. 5 is the planar view (first embodiment) of tanks of the present invention;

Fig. 6 is the planar view (first embodiment) of petrolift of the present invention;

Fig. 7 is the action diagram (first embodiment) of the installation gist of expression petrolift of the present invention;

Fig. 8 is the action diagram (first embodiment) of the effect of expression fuel pump configuring structure of the present invention;

Fig. 9 is the instruction diagram (first embodiment) of cooling structure of the power unit of expression small motorcycle type with low of the present invention;

Figure 10 is the section-drawing (second embodiment) of expression fuel pump configuring structure of the present invention;

Figure 11 be Figure 10 11 to view;

Figure 12 is the instruction diagram (second embodiment) of the flange part of expression petrolift of the present invention;

Figure 13 is the instruction diagram (second embodiment) of expression installation bracket of the present invention;

Figure 14 is the 14-14 line section-drawing of Figure 11;

Figure 15 be Figure 11 15 to view;

Figure 16 is the action diagram (second embodiment) of the installation gist of expression petrolift of the present invention.

Nomenclature

10: small motorcycle type with low; 21: ingathering chamber (containing box); 22: tanks; 33: trailing wheel; 72: the seat; 73: shelf (back carrier); 91: petrolift; 92: cartridge (fuel distribution tube); 126: the wall of rear side (inclined wall); 126b: dip plane; 142: the fuel inlet; 143: upper wall; 152: diapire; 152a: bottom surface; 153: rear wall; 154; Recess; 162: sucking hole (suction pipe); 163: filter; 168: mounting flange portion (flange part); 192: link (hold-down bolt); 195: hole portion (bolt insertion hole); 202: link (nut); 231: petrolift; 232: carriage (installation bracket); 232a, 232b: otch (first otch, second otch); 232c, 232d: support (first support, second support); 241: mounting flange portion (flange part), 245: lead.

The specific embodiment

Followingly be used to implement best mode of the present invention with reference to description of drawings.In addition, accompanying drawing is the drawing of seeing according to the symbol direction.

Fig. 1 is the small motorcycle type lateral plan (first embodiment) that adopts fuel pump configuring structure of the present invention, small motorcycle type with low 10 is the two-wheeled of following structure: via front fork 13 front-wheel 14 being operated the rudder is installed on the head pipe 12 that constitutes vehicle frame 11 front ends freely, pair of right and left rear frame 16 at the rear portion that constitutes vehicle frame 11, the tanks 22 that 17 (symbols 16 that only show a side in the presentation graphs) are installed containing box 21 and are disposed at these containing box 21 rears, at rear frame 16, a pin plate 23 is installed in 17 bottom, 24 (symbols 23 that only show a side in the presentation graphs), striding frame in these pin plates 23, mounting support framework 27 on the cross pipe 26 on 24, via pivot 28 power unit 31 swings are installed on this bearer frame 27 freely, trailing wheel 33 is installed at rear portion at the toric transmission 32 that constitutes this power unit 31, at the rear portion and the rear frame 16 of toric transmission 32,17 side straddle mountings have posterior bumper unit 34.

Vehicle frame 11 by head pipe 12, from this pipe 12 roughly extend downwards and the main frames 41 that rearward extend, the rear end that is installed on this main frame 41 and about tube frame 42, the pair of right and left of extending to oblique back upper place from this tube frame 42 of extending rear frame 16,17 and stride the cross pipe 43 of frame on these rear frames 16,17 and constitute.In addition, symbol 45 is the upper brackets that are installed on for the upper end of supporting posterior bumper unit 34 on the cross pipe 43.

Power unit 31 is made of the toric transmission 32 of being located at anterior driving engine 51 and being located at the rear portion sidepiece of this driving engine 51 integratedly, and driving engine 51 has with nearly horizontal state bevelled cylinder portion 52, is provided with cylinder head 53 in this cylinder portion 52.

Cylinder head 53 connects air inlet system 54 on top, connect exhaust gear 56 in the bottom.

Exhaust gear 56 constitutes by the freeing pipe 57 that rearward extends from the bottom of cylinder head 53 with the rear end bonded assembly noise silencer 58 of this freeing pipe 57.

Symbol 61 is head lamps, the 62nd among the figure, gauge panel, the 63rd, and steering tiller, the 64th, handle cover, the 65th, indicator lamp, the 66th, front shroud, the 67th, front fender apron, the 68th, pedal, the 71st is installed on the footrest frame, the 72nd on the main frame 41, seat, the 73rd, rear support, the 74th, taillight, the 76th, rear mudguard, the 77th, support for supporting pedal 68.

Fig. 2 is the main portion lateral plan (first embodiment) at the rear portion of expression small motorcycle type with low of the present invention, air inlet system 54 is connected by the airfilter 81 on the top, rear portion that is installed on power unit 31, with the anterior bonded assembly connection pipe 82 of this airfilter 81, with the front end bonded assembly throttle body 83 of this connection pipe 82 and with the front end of this throttle body 83 and constitutes with the top bonded assembly air inlet pipe 84 of cylinder head 53, and throttle body 53 is equipped with fuel injection valve 85 integratedly.In addition, symbol 86,87,88 is followed successively by admission port, combustion chamber, the exhausr port that is formed on the cylinder head 53, and admission port 86 is connected with air inlet pipe 84, from fuel injection valve 85 to these admission port 86 burner oils.

Tanks 22 is to establish the type parts in the rear portion is equipped with the pump of petrolift 91, is connected to fuel injection valve 85 by fuel distribution tube 92 from the top of petrolift 91 always.

Fuel distribution tube 92 is the resin manufacture of elastically deformable, by the position, two places in holding member 94, the 104 maintenance pipe arrangement ways, holding member 94 is installed on the outstanding pole 96 that is provided with on the rear frame 16 by bolt 95, and holding member 104 is installed on the driving engine 51 by bolt 95.

Fig. 3 is the main portion planar view (first embodiment) at the rear portion of expression small motorcycle type with low of the present invention, via pair of right and left front carriage 97,98 and back carriage 101,102, tanks 22 is installed in the rear portion of rear frame 16,17 by a plurality of bolts 103, petrolift 91 is installed at rear portion in tanks 22, by the top of rear support 73 these petrolifts 91 of covering, be connected to the fuel injection valve 85 that throttle body 83 is provided with from petrolift 91 by fuel distribution tube 92 always.

Rear support 73 comprises: the U-shaped portion 105 that end 105a, 105b is installed on the roughly U-shaped of front carriage 97,98 sides; Be installed on the line part 106 of the roughly linearity in this U-shaped portion 105 along the extension of overall width direction; Both ends are expanded to the left and right and central portion is installed on extension part 107 on the rear support 16,17; Be installed on the triangular portion 108 of the general triangular on each of line part 106 and extension part 107 respectively.Above-mentioned line part 107 and triangular portion 108 be positioned at petrolift 91 directly over.

Air inlet system 54 extends connection pipe 82 from the inner face of the box main body 112 of the air filter case 111 of formation airfilter 81 with く shape, front end at this connection pipe 82 connects throttle body 83, front end at this throttle body 83 connects air inlet pipe 84, is installed on the cylinder head 53 by bolt 114,114 front ends with this air inlet pipe 84.In addition, symbol 116 is the case lid that constitutes air filter case 222 with box main body 112.

Fuel distribution tube 92 is fixed on vehicle frame 11 sides with petrolift 91 to the part 92a between the holding member 94, the place ahead at holding member 104 will be fixed in power unit 31 sides until the part 92b of fuel injection valve 85, part 92c and power unit 31 between holding member 94 and the holding member 104 together can be swung, as shown in Figure 2, by crooked by part 92c side is seen slowly, during power unit 31 swings in each one of part 92c approximate equality ground produce deflection or distortion and prevent to act on rough power.

Fig. 4 is the main portion section-drawing (first embodiment) at the rear portion of expression small motorcycle type with low of the present invention, in the front carriage 97 that is installed on the cross pipe 43, on 98 (the only inboard symbols 98 of expression), be connected with the lower end that erects carriage 121 that extends longitudinally by the front portion of bolt 103 the flange 22a of tanks 22, in the upper end that erects carriage 121, by bolt 124 respectively with the end 105a of the U-shaped portion 105 of rear support 73,105b (the only inboard symbol 105b of expression), the par, rear portion 123 of containing box 21 connects, be installed on rear frame 16, the back carriage 101 of the rearward end of 17 (the only inboard symbols 17 of expression), on 102 (the only inboard symbols 102 of expression), the rear portion of the flange 22a of tanks 22 is installed by bolt 103, and, petrolift 91 is installed on the inclined wall 126 at the rear portion, top of being located at tanks 22, be installed on rear frame 16, nut part 128 is installed on the frame support bracket 127 of 17 rearward end, on this nut part 128, the lower end that to support the extension part 107 of the back cover 131 of taillight 74 and rear support 73 by bolt 132 connects, and will be exposed at petrolift 91 exterior parts by cover 133 on the rear portion and cover.In addition, a plurality of symbols 134 are respectively and are welded on front carriage 97,98, back carriage 101,102 and erect nut on the carriage 121.

The upper flange 136a that tanks 22 will be formed at the circumference of upper can 136 engages with the lower flange 137a of the circumference that is formed at bottom jar 137 and forms container-like.

Rear portion upper wall 144 that upper can 136 has antetheca 141, forms the upper wall 143 of fuel inlet 142, descend from this upper wall 143 and the inclined wall 126 that extends to the below of retreading from this rear portion upper wall 144 offer on the 126b of the dip plane of inclined wall 126 and are used to connect the pump through hole 146 that petrolift 91 is installed.In addition, symbol 148 is filling caps of blocking fuel inlet 142.

Upper can 137 has antetheca 151, diapire 152 and rear wall 153, and the substantial middle of the bottom surface 152a of diapire 152 is caved in and formation recess 154.

Petrolift 91 is by pump main body 161, constitute with the bottom bonded assembly suction pipe 162 of this pump main body 161, the fuel surplus meter 164 that is installed on the filter 163 of these suction pipe 162 lower ends and is installed on pump main body 161 sides integratedly.

Pump main body 161 comprises: take in pump and drive the cylindrical portion 166 of the motor of this pump, be embedded in large-diameter portion 167 on the pump through hole 146 of tanks 22 by the top that is integrally formed at this cylindrical portion 166, be integrally formed in the flange part 168 on this large-diameter portion 167 and be located at fuel discharge outlet 171 on this flange part 168, connect fuel distribution tube 92 on fuel discharge outlet 171.

Filter 163 disposes near being formed at recess 154 tops on bottom jar 137 diapires 152, can use more effectively thus and accumulate in the bottom jar fuel at 137 ends.

The pump main body 161 of petrolift 91 is formed generally perpendicularly on flange part 168, so by flange part 168 being installed on the inclined wall 126 of tanks 22, can be in the front lower place be disposed at tanks 22 obliquely with pump main body 161.

By disposing pump main body 161 obliquely to the front lower place, vehicle for example starts or quickens and make fuel in tanks 22 when rearward mobile, can utilize pump draws fuel easily in the pump main body 161 via filter 163.

In addition because filter 163 is located at the substantial middle of tanks 22, vehicle forwards or the rear shake, front portion or the rear portion when moving of fuel in tanks 22, even residual fuel amount is few, fuel is resided near the filter 163, fuel is difficult for using up.

By with pump main body 161 to the front lower place tilted configuration, can suppress the whole height of petrolift 91 lower, also can reduce the whole height of tanks 22.Its result also can reduce the height at the seat 72 that is disposed at tanks 22 tops, improves the convenience of getting off by bus.

The rear portion extension 175 that containing box 21 will cover the upper wall 143 of upper can 136 is arranged on the par, rear portion 123 integratedly, makes filling cap 148 outstanding upward from the through hole 176 that is opened on this rear portion extension 175.In addition, symbol 178 is that to surround filling cap 148 and be located at perisporium, symbol 181 on the rear portion extension 175 be that to avoid filling cap 148 and be formed at recess, symbol 183 on the base plate 182 of seat 72 be for making inside that dust etc. do not enter containing box 21 with leak free sealing element between the edge part of containing box 21 and 72 the base plate 182.

Fig. 5 is the planar view (first embodiment) of tanks of the present invention, the fuel inlet 142 of fuel is set on the upper wall 143 of the front upper portion of tanks 22, on the rear portion of tanks 22 rake 126, offer pump through hole 146, the pump fabricated section 186 be used to install petrolift 91 (with reference to Fig. 4) is installed on the edge part of this pump through hole 146, the substantial middle of the diapire 152 of tanks 22 form with the filter 163 of petrolift 91 below relative recess 154.

Pump fabricated section 186 is by annular plate 188 and be installed on respectively than the hold-down bolt 192 in the high one section a plurality of epimere portion 191 that forms of this annular plate 188 and constitute.In addition, symbol 22b, 22c, 22d are the jar mounting holes that is opened in for tanks 22 is installed on vehicle frame 11 (with reference to Fig. 3) side on the flange part 22a.

Fig. 6 is the planar view (first embodiment) of petrolift of the present invention, the bolt insertion hole 195 that the flange part of petrolift 22 168 makes tanks 22 (with reference to Fig. 5) side for pentagon roughly offers on this pentagonal bight hold-down bolt 192 passes through.In addition, symbol 196 is the adaptor unions that connect the lead of electrical motor (not shown) energising in petrolift 91.

Filter 163 is provided with than petrolift 91 central authorities more close overall width direction left side, has the filter end 163a that linearity extends on fore-and-aft direction of roughly overall width direction central authorities that makes petrolift 91.

Next the installation gist of above-described petrolift 91 to tanks 22 be described.

Fig. 7 is the action diagram (first embodiment) of the installation gist of expression petrolift of the present invention.

When being installed on petrolift 91 on the tanks 22, (1) shown in arrow mark A, A, the sealing element 201 of the rubber system of ring-type is abutted to the inboard of the peripheral edge portion 126a and the pump fabricated section 186 of pump through hole 146, (2) shown in arrow mark B, B, make a plurality of bolt through holes 195 of offering on the flange part 168 of petrolift 91 respectively with the hold-down bolt 192 that is formed at pump fabricated section 186 on columnar portion 192a chimeric, (3) shown in arrow mark C, C, nut 202 is screwed into respectively among the threaded portion 192b of hold-down bolt 192.

At this moment, sealing element 201 is embedded among the endless groove 168a that forms on the flange part 168 of petrolift 91, and pushes the circumference 126a of inclined wall 26, so sealing between circumference 126a and the flange part 168 can be prevented fuel leak.

Next the effect of above-described fuel pump configuring structure is described.

Fig. 8 is the action diagram (first embodiment) of the effect of expression fuel pump configuring structure of the present invention.

For example, shown in hollow arrow, small motorcycle type with low is when vehicle front is advanced, particularly when starting or quicken, fuel 210 in the tanks 22 moves to rear view of vehicle shown in arrow mark E, and the liquid level 210a of the fuel 210 of the rear portion side of tanks 22 increases (the liquid level 210a that imaginary line is level).

At this moment, shown in arrow flag F, F, fuel 210 is sucked from filter 163, shown in arrow mark G, is drawn in the pump main body 161 from filter 163 via suction pipe 162.Fuel 210 is in rear view of vehicle moves, because to the component of fuel 210 effects to oblique back upper place, draw so carry out the fuel shown in the arrow mark G more easily, therefore can be easily from petrolift 91 required a large amount of fuel of driving engine when the driving engine supply vehicle starts or during acceleration.

Fig. 9 (a) and (b) are instruction diagrams (first embodiment) of cooling structure of the power unit of expression small motorcycle type with low of the present invention.

(a) be expression power unit 31, the main portion lateral plan of the cooling structure of toric transmission 32 in detail, power unit 31 has the crankcase 31A that takes in bent axle, the change-speed box cover 32A that covers toric transmission 32 sides is installed on this crankcase 31A, and change-speed box cover 32A has air at leading section and is taken into a mouthful 32b.

The hollow bulb 16a of the rear frame 16 of vehicle frame 11 1 sides is connected by scalable and flexible for example snake abdomen shape air leading-in conduit 221 with above-mentioned air inlet 32b.

(b) be the b-b line section-drawing of (a), offer through hole 16b,, the pipe embedded hole 221a that is located on the air leading-in conduit 221 is fitted on this cartridge unit 223 at the circumference installation tube parts 223 of this through hole 16b in the side of rear frame 16.In addition, symbol 223a is for air leading-in conduit 221 is not come off from cartridge unit 223 and be formed at fastener on the end outer peripheral face of cartridge unit 223.

Next the effect of the cooling structure of above-mentioned toric transmission 32 is described.

In (b), air is never graphic to be taken among mouthful hollow bulb 16a that flows into rear frame 16, pass through to arrive air leading-in conduits 221 in through hole 16b, the cartridge unit 223 from hollow bulb 16a, in (a), air is in the toric transmission 32 in air leading-in conduit 221 interior inflow change-speed box cover 32A, and inside is cooled off.

Because air leading-in conduit 221 is scalable and flexible parts, so even power unit 31 is that the center swings up and down with pivot 28, air leading-in conduit 221 also can be followed this swing.

Figure 10 is the section-drawing (second embodiment) of expression fuel pump configuring structure of the present invention, for structure mark prosign and the detailed identical with first embodiment of Fig. 1～shown in Figure 9.

Tanks 22 is to be to establish the type tanks in the pump on the inclined wall 126 by the rear portion that installation bracket 232 and link (being a plurality of hold-down bolts 192, nut 202) are installed on tanks 22 with petrolift 231.

Petrolift 231 is by pump main body 233, constitute with bottom bonded assembly suction pipe 162, the filter 163 of this pump main body 233 and the fuel surplus meter 234 that is installed on pump main body 233 sides integratedly.In addition, symbol 235 is floats that fuel surplus meter 234 is had.

Pump main body 233 comprises: take in pump and drive the motor of this pump cylindrical portion 237, be integrally formed at the top of this cylindrical portion 237 and be inserted into large-diameter portion 238 in the pump through hole 146 of tanks 22, be integrally formed in the flange part 241 on this large-diameter portion 238 and be located at fuel discharge outlet 242 on this flange part 241, on fuel discharge outlet 242, connect fuel distribution tube 92 (with reference to Fig. 4).

Because pump main body 233 is formed generally perpendicularly on flange part 241, so by on the inclined wall 126 that flange part 241 is installed on tanks 22 and pump main body 233 can be disposed in the tanks 22 obliquely to the front lower place.

Figure 11 be Figure 10 11 to view, installation bracket 232 is overlapped with the flange part 241 of petrolift 231, be screwed into nut 202 respectively and petrolift 231 be installed on the tanks 22 at the leading section of each hold-down bolt 192.

Petrolift 231 is provided with above-mentioned fuel discharge outlet 242 and Male Connector 247 on flange part 241, this adaptor union 247 is for to electrical power or take out the output signal of fuel surplus meter 234 (with reference to Figure 10) and be connected with a plurality of leads 245 via Female Connector 246.

Installation bracket 232 is an endless member, interior perimembranous at installation bracket forms the first otch 232a and the second otch 232b, the fuel discharge outlet 242 on the flange part 241 that these otch are used to avoid installation bracket and be located at petrolift 232 and the interference of Male Connector 247, be formed with at the peripheral part of installation bracket and be used for first support 232c that the anchor clamps 251 that keep fuel distribution tube 92 are supported and the second support 232d that the wirning harness 252 with multiple conducting wires 245 harnesses is supported, installation bracket 232 is by sheet stamping forming.In addition, symbol 232e is for anchor clamps 251 location being integrally formed at the sheet that erects on the installation bracket 232.

Part after installation bracket 232 is removed the first support 232c and the second support 232d is flat annulus 232A.

Symbol 92d is a L shaped joint of being located at fuel distribution tube 92 1 ends among the figure, is connected with fuel discharge outlet 242.

Figure 12 is the instruction diagram (second embodiment) of flange part of expression petrolift of the present invention, is formed with a plurality of otch 241a by the roughly V-arrangement of hold-down bolt 192 (with reference to Fig. 1) at the peripheral part of flange part 241.Like this,, for example compare, can reduce working accuracy so can reduce cost with the bolt hole of offering by hold-down bolt 192 by on flange part 241, forming otch 241a.

Figure 13 is the instruction diagram (second embodiment) of expression installation bracket of the present invention, inner peripheral at the installation bracket 232 of ring-type, with the first otch 232a, the second otch 232b forms relatively, the described first otch 232a avoids and fuel discharge outlet 242 (with reference to Figure 12) interference, the described second otch 232b avoids and Male Connector 247 (with reference to Figure 12) interference, in outer peripheral edges, at central opposite one side-prominent first support 232c of supporting fixture 251 (with reference to Figure 11) and the second support 232d of supporting wirning harness 252 (with reference to Figure 11) of being formed with of relative installation bracket 232.In addition, a plurality of symbol 232f are the bolt insertion holes by hold-down bolt 192 (with reference to Figure 11), and symbol 232g is in order to make anchor clamps 251 not from slip-off preventing hole that installation bracket 232 comes off.

Figure 14 is the 14-14 line section-drawing of Figure 11, and anchor clamps 251 are to have flexual resinous parts, comprising: tabular base portion 251a; By the end U-shaped from base portion 251a be bent to form and with the base portion 251a bracket side kink 251b of clamping installation bracket 232 together; In order to keep fuel distribution tube 92, at another distolateral, as on the opposing face of bracket side kink 251b, to form C shape pipe arrangement maintaining part 251c of base portion 251a.

Symbol 251d among the figure is the outstanding projection that forms on the face relative with the bracket side joggling part 251b of base portion 251a, by preventing that anchor clamps 251 from coming off from installation bracket 232 among the slip-off preventing hole 232g that embeds installation bracket 232.In addition, symbol 232h, 232h (only having represented inboard symbol 232h) be make anchor clamps 251 not in figure positive apparent direction move more greatly and the end of the both sides of anchor clamps 251 and the first support 232c upward warpage and form above joggling part, symbol 251e is in order to be easy to anchor clamps 251 are installed on the installation bracket 232 and be located at the rake of bracket side joggling part 251b front end, symbol 251f is the extension that is integrally formed at pipe arrangement maintaining part 251c front end, and symbol 251g is to the side-prominent mountain portion of extension 251f from base portion 251a.

For anchor clamps 251 being installed on the first support 232c, between the base portion 251a of anchor clamps 251 and bracket side joggling part 251b, be pressed into anchor clamps 251, with from the leading section 232j side clamping first support 232c, the end 251h of anchor clamps 251 moves to and erects sheet 232e butt.

In order to keep fuel distribution tube 92 by pipe arrangement maintaining part 251c, finger is ridden over the inlet 251j that extension 251f upward opens pipe arrangement maintaining part 251c, fuel distribution tube 92 is pressed into the pipe arrangement maintaining part 251c from inlet 251j.Stenosis is narrow because inlet 251j passes through the 251g of mountain portion, so fuel distribution tube 92 is difficult for coming off from pipe arrangement maintaining part 251c.

Figure 15 be Figure 11 15 to view, the second support 232d is that warpage forms L shaped part, is made of vertical component effect 232k and horizontal part 232m.

By this second support 232d, distribution 252 is sandwiched between annulus 232A and the horizontal part 232m and can prevents its bigger up and down vibration.

Figure 16 is the action diagram (second embodiment) of the installation gist of expression petrolift of the present invention.

For petrolift 231 is installed on the tanks 22, (1) as arrow mark J, shown in the J, the rubber system sealing element 201 of ring-type and the circumference 126a of pump through hole 146, the inboard butt of pump fabricated section 186, (2) as arrow mark K, shown in the K, the cylindrical portion 237 of pump main body 233 and large-diameter portion 238 are by pump through hole 146 and will be formed at wavy 241b below the installation root of flange part 241 and press and be attached on the sealing element 201, hold-down bolt 192 is by the otch 241a of this flange part 241, (3) as the arrow label L, shown in the L, installation bracket 232 overlaps with the top 241c of flange part 241 and the hold-down bolt 192 bolt insertion hole 232f by installation bracket 232, (4) as arrow mark M, shown in the M, nut 202 is screwed into respectively on the threaded portion 192b of hold-down bolt 192.Finish the installation of petrolift 231 thus to tanks 22.

As above Fig. 1, Fig. 4 and the illustrated ground of Fig. 8, first aspect present invention, small motorcycle type with low 10 below the seat 72 of occupant configuration as the containing box 21 of ingathering chamber, configuration tanks 22 above the rear of this containing box 21 and trailing wheel 33, wherein, front portion at the upper wall 143 of tanks 22 is provided with fuel inlet 142, wall at the rear of the fuel inlet 142 of tanks 22 is on the inclined wall 126, is seen as the petrolift of being located in front lower place bevelled mode disposes in the tanks 22 91 with the side.

Thus, thereby the height that can reduce tanks 22 reduces the height at seat 72, and after a little while in residual fuel amount, even when starting small motorcycle type with low 10, also can utilize fuel 210 in tanks 22, to move to rear view of vehicle, can effectively fuel 210 be drawn in the petrolift 91 necessary fuel such as when guaranteeing vehicle launch easily.

Second aspect present invention, tanks 22 have see the rear portion that makes upper wall 143 or rear wall 153 in the side top to bevelled dip plane, back lower place 126a, on the 126a of this dip plane, petrolift 22 is installed.

Thus,, can dispose bigger petrolift 91, increase fuel flow even small-sized tanks 22 also can effectively utilize the space in the tanks 22.

Third aspect present invention disposes the rear support 73 as shelf above petrolift 91.

Thus, can utilize rear support 73 to protect petrolift 91, can prevent article and petrolift 91 interferences.

Fourth aspect present invention, making the sucking hole of being located at petrolift 91 is that filter 163 on the suction pipe 162 is relative with the bottom surface 152a of tanks 22, and makes bottom surface 152a along the shape of filter 163 and cave in.

Thus,, also can easily suck fuel, use fuel 210 effectively by petrolift 91 even when residual fuel amount is a small amount of.

Fifth aspect present invention, as Figure 10 and shown in Figure 16, at the flange part 241 that is provided on the petrolift 231 being installed on the tanks 22, overlap with this flange part 241 and dispose the installation bracket 232 of ring-type, this carriage 232 is fixed on flange part 241 on the tanks 22 by link (hold-down bolt 192 and nut 202), is formed with to prevent the first otch 232a, the second otch 232b that interfere with the part (being fuel discharge outlet 242 and Male Connector 247) of petrolift 231 on installation bracket 232.

Thus, when being installed on petrolift 231 on the tanks 22, for example easily installation bracket 232 is inserted from axially (be arrow label L, L towards) of hold-down bolt 192 and nut 202, do not interfere with the fuel discharge outlet 242 and the Male Connector 247 of petrolift 231, can overlap with flange part 241, improve assembleability.

Sixth aspect present invention, as shown in figure 11, on installation bracket 232, formed the first support 232c, the second support 232d, these support part supports and petrolift 231 bonded assembly fuel distribution tubes 92 and with lead 245 that petrolift 231 is electrically connected at least one side.

Thus, do not need to be used for supporting fuel pipe arrangement 92 and lead 245 at least one sides' special support unit, can seek the minimizing of number of parts.

Seventh aspect present invention, as shown in Figure 7, at the flange part 168 that is provided on the petrolift 91 being installed on the tanks 22 as mounting flange portion, on this flange part 168, form bolt insertion hole 195 as hole portion, the hold-down bolt 192 as link of being located at tanks 22 sides connects this bolt insertion hole 195, thereby upward petrolift 91 is installed on the tanks 22 by the threaded portion 192b that will be screwed into this hold-down bolt 192 as the nut 202 of link.

Thus, can discard the flange part of for example pushing petrolift and it is installed on other carriage on the tanks, can reduce the part number, cutting down cost.

Fuel pump configuring structure of the present invention is suitable for small motorcycle type with low.

Claims (7)

1. the fuel pump configuring structure of a small motorcycle type with low, this small motorcycle type with low disposes ingathering chamber below the seat of occupant, above the rear of this ingathering chamber and trailing wheel, dispose tanks, it is characterized in that, upper wall front portion in described tanks is provided with the fuel inlet, on the wall at the rear of the described fuel inlet of described tanks, be seen as the petrolift of in front lower place bevelled mode disposes, being located in the described tanks with the side.

2. the fuel pump configuring structure of small motorcycle type with low as claimed in claim 1 is characterized in that, described tanks have see the rear portion that makes upper wall or rear portion in the side top to bevelled dip plane, the back lower place, described petrolift is installed on this dip plane.

3. the fuel pump configuring structure of small motorcycle type with low as claimed in claim 1 or 2 is characterized in that, disposes shelf above described petrolift.

4. as the fuel pump configuring structure of each described small motorcycle type with low in the claim 1～3, it is characterized in that, make the filter of being located at described petrolift sucking hole relative, and make the shape depression of described bottom surface along described filter with the bottom surface of described tanks.

5. as the fuel pump configuring structure of each described small motorcycle type with low in the claim 1～4, it is characterized in that, in the mounting flange portion that is provided on the described petrolift being installed on the described tanks, overlap with this mounting flange portion and dispose the carriage of ring-type, this carriage is fixed on described mounting flange portion on the described tanks by link, is formed with to prevent the otch of interfering with the part of described petrolift on described carriage.

6. the fuel pump configuring structure of small motorcycle type with low as claimed in claim 5, it is characterized in that, on described carriage, formed support, this support part supports and described petrolift bonded assembly cartridge and with described petrolift bonded assembly lead at least one side.

7. as the fuel placement structure of each described small motorcycle type with low in the claim 1～4, it is characterized in that, in the mounting flange portion that is provided on the described petrolift being installed on the described tanks, in this mounting flange portion, form hole portion, connect this hole portion and petrolift is installed on the tanks by link.

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