CN1460779A - Secondary air supply device for motor-driven two wheeler - Google Patents

Abstract

The invention relates to a secondary air supplying device for a motorcycle to facilitate the maintenance of an air cleaner for a secondary air, to eliminate the necessity of mounting an excess component to connect a suction tube to a frame pipe, and to reduce a cost, in which the part of a passage for supplying the secondary air to an exhaust system of an engine mounted in a body frame having the frame pipe having the frame pipe is formed in the frame pipe. The downstream end of the suction tube 64 is connected to the suction port of the air cleaner 3 for the secondary air supported to the body frame 25 disposed at the outside of the frame 25, and the upstream side of the tube 64 is inserted into the end opening of the frame pipe 30 by interposing a soundproof material 65 between the tube 64 and the inner surface of the pipe 30.

Description

The secondary air-supply device of motor bike

Technical field

The present invention relates to the secondary air-supply device that an a kind of part to the path that carries the vent systems feeding secondary air that is contained in the engine on the vehicle body frame with frame tube is formed at the motor bike in the described frame tube.

Background technique

This secondary air-supply device, for example promptly open at real fair 3-32742 communique, be the frame tube that is difficult to enter with dust inside as be used for feeding secondary air path a part and form.

But, in above-mentioned prior art, because secondary air is located in the frame tube with air-strainer, therefore, secondary air is very difficult with the maintenance of air-strainer, and because what adopt is to connect the structure of flexible pipe on the connecting tube that is installed on the sidewall of frame tube, thereby need carry out connecting tube is installed to operation on the frame tube, therefore, cost will correspondingly increase.

The present invention proposes in view of above-mentioned present situation, its objective is, provide a kind of secondary air to be easy to carry out with the maintenance of air-strainer, and needn't be for inhaling hose being connected to the secondary air-supply device that the motor bike that other parts thereby cost be minimized is installed on the frame tube.

Summary of the invention

For achieving the above object, the technological scheme 1 of invention is formed at the secondary air-supply device of the motor bike in the described frame tube for an a kind of part to the path that carries the vent systems feeding secondary air that is contained in the engine on the vehicle body frame with frame tube, it is characterized in that, in the outside that is configured in described vehicle body frame, and being supported in the downstream that is connected with inhaling hose on the suction port of secondary air on this vehicle body frame with air-strainer, the upstream extremity of this inhaling hose is quieter material is clipped between the internal surface of itself and described frame tube and inserts in this frame tube open-ended.

According to this configuration, because secondary air is configured in the outside of vehicle body frame with air-strainer, therefore be easy to safeguard, and since the upstream extremity of inhaling hose insert in frame tube open-ended, thereby when being connected to inhaling hose on the frame tube, do not need to install other parts, therefore can reduce cost, in addition, owing between the internal surface of the upstream extremity of inhaling hose and frame tube, dispose the negotiable quieter material of air, thereby the air suction and noise that therefore can reduce generation in the frame tube obtains erasure effect.

In addition, the feature of the technological scheme 2 of invention is, on the basis of the structure of technique scheme 1, be located at described engine and secondary air with between the air-strainer and to be supported in secondary air control valve on the described vehicle body frame be that a part with described vehicle body frame is clipped in the middle and is configured in described secondary air with the opposition side of air-strainer; According to this configuration, secondary air can make secondary air is become simple with the structure that couples together between air-strainer and the secondary air control valve near configuration with air-strainer and secondary air control valve.

The invention technological scheme 3 feature be, on the basis of the structure of technique scheme 1, described vehicle body frame has the rear end toward each other and the pairing left and right frame tube of opening at its rear portion, the upstream extremity of described sucking pipe inserts in a certain side's the rearward end opening of these frame tube; According to this configuration, needn't process in addition frame tube, can further reduce cost for sucking pipe is connected on the frame tube.

The feature of technological scheme 4 of invention is, on the basis of the structure of technique scheme 3, the rear end of the opposing party's frame tube among the frame tube of described pairing left and right is formed with the inclined-plane, and described sucking pipe carries in changing the inclined-plane configuration; According to this configuration, sucking pipe does not need to do very macrobending, and the suction air in the sucking pipe is flowed well.

As mentioned above, technological scheme 1 according to invention, secondary air is easy to carry out with the maintenance of air-strainer, and when being connected to inhaling hose on the frame tube, do not need to install other parts thereby can reduce cost, in addition, thus can reduce the air suction and noise that produces in the frame tube obtains erasure effect.

In addition, according to the technological scheme 2 of invention, secondary air can make secondary air is become simple with the structure that couples together between air-strainer and the secondary air control valve near configuration with air-strainer and secondary air control valve.

According to the technological scheme 3 of invention, needn't process in addition frame tube for sucking pipe is connected on the frame tube, can further reduce cost.

Have, according to the technological scheme 4 of invention, sucking pipe does not need to do very macrobending again, and the suction air in the sucking pipe is flowed well.

Description of drawings

Fig. 1 is the side view of scooter type motor bike.

Fig. 2 is the stereogram that has omitted the rear portion of the scooter type motor bike under the state of body cover and article case.

Fig. 3 is the side view of vehicle body frame.

Fig. 4 is the enlarged view of arrow 4 directions of Fig. 3.

Fig. 5 is the plan view after pulling down of Fig. 4 kept off mud parts and shockproof connecting rod.

Fig. 6 is the vertical profile enlarged view of part shown in the arrow 6 of Fig. 1.

Fig. 7 is that the 7-7 of Fig. 4 is to sectional view.

Fig. 8 is the plan view of shockproof connecting rod.

Fig. 9 is the stereogram that has omitted the intermediate portion of the scooter type motor bike under the state of body cover and article case.

Figure 10 is air-strainer and connecting tube are seen past tense from the top a plan view.

Figure 11 has omitted the 11-11 of the Figure 10 under the state of air-strainer to sectional view.

Figure 12 is past tense is seen on the top of having omitted the scooter type motor bike under the body cover state from the rear figure.

Figure 13 is that sectional view cuts open in the office of joint that the upstream extremity to sucking pipe is connected with the rear frame pipe major component of being showed.

Figure 14 is a longitudinal sectional view of showing the structure of secondary air control valve.

Figure 15 is that the 15-15 of Fig. 6 is to sectional view.

Figure 16 is the stereogram of wood clapper.

Figure 17 is the partial top view of wood clapper.

Figure 18 is the plan view of retaining mud parts.

Figure 19 is the side view of arrow 19 directions of Figure 18.

Figure 20 is the plan view of arrow 20 directions of Figure 19.

Figure 21 is that the 21-21 of Figure 18 is to sectional view.

Figure 22 is that the 22-22 of Figure 18 is to sectional view.

Figure 23 is that the 23-23 of Figure 18 is to sectional view.

Embodiment

Below, to embodiments of the present invention, in conjunction with the accompanying drawings shown in one embodiment of the present of invention describe.

Fig. 1～Figure 23 illustrates one embodiment of the present of invention, Fig. 1 is the side view of scooter type motor bike, Fig. 2 is the stereogram that has omitted the rear portion of the scooter type motor bike under the state of body cover and article case, Fig. 3 is the side view of vehicle body frame, Fig. 4 is the enlarged view of arrow 4 directions of Fig. 3, Fig. 5 is the plan view after pulling down of Fig. 4 kept off mud parts and shockproof connecting rod, Fig. 6 is the vertical profile enlarged view of part shown in the arrow 6 of Fig. 1, Fig. 7 is that the 7-7 of Fig. 4 is to sectional view, Fig. 8 is the plan view of shockproof connecting rod, Fig. 9 is the stereogram that has omitted the intermediate portion of the scooter type motor bike under the state of body cover and article case, Figure 10 is air-strainer and connecting tube are seen past tense from the top a plan view, Figure 11 has omitted the 11-11 of the Figure 10 under the state of air-strainer to sectional view, Figure 12 is past tense is seen on the top of having omitted the scooter type motor bike under the body cover state from the rear figure, Figure 13 is that sectional view cuts open in the office of joint that the upstream extremity to sucking pipe is connected with the rear frame pipe major component of being showed, Figure 14 is a longitudinal sectional view of showing the structure of secondary air control valve, Figure 15 is that the 15-15 of Fig. 6 is to sectional view, Figure 16 is the stereogram of wood clapper, Figure 17 is the partial top view of wood clapper, Figure 18 is the plan view of retaining mud parts, Figure 19 is the side view of arrow 19 directions of Figure 18, Figure 20 is the plan view of arrow 20 directions of Figure 19, Figure 21 is that the 21-21 of Figure 18 is to sectional view, Figure 22 be the 22-22 of Figure 18 to sectional view, Figure 23 is that the 23-23 of Figure 18 is to sectional view.

At first, in Fig. 1～Fig. 5, the vehicle body frame 25 of scooter type motor bike has: front end is fixed with the main frame pipe 27 of head pipe 26, the fixing transverse tube 28 that meets at right angles in the rear end of this main frame pipe 27, and the rear frame pipe 29,30 of the pairing left and right that links to each other with two ends of transverse tube 28 separately of front end.

Main frame pipe 27, by from the beginning manage the 26 declivity frame section 27a that tilt to the rear lower side and, the lower frame section 27b that flatly rearward extends substantially from the rear end of declivity frame section 27a the two fuse and constitute, in the rearward end of lower frame section 27b, be formed with the rubber support part 31 of the tubular that on above-below direction, is crushed.Transverse tube 28 extends to the left and right directions of vehicle body frame 25, described rubber support part 31 from this transverse tube 28 axially on central position pass, thereby with transverse tube 28 axially on central position be vertically fixed on the rearward end of main frame pipe 27.In addition, between transverse tube 28 and main frame pipe 27, be provided with a pair of reinforcing member 32,33 up and down that the joint that is used for to transverse tube 28 and main frame pipe 27 strengthens.

The rear frame pipe the 29, the 30th of pairing left and right, by last oblique frame section 29a, the 30a that extends to the back upper place from two ends of described transverse tube 28 is set continuously integratedly, and from the rear end of last oblique frame section 29a, 30a substantially extension rearward flatly and make at horizontal in-plane bending the rearward end opening toward each other upper frame part 29b, 30b and constitute.

Described head pipe 26 upper supports have the front fork that turns to 34 that is across front-wheel WF both sides, and linking in the upper end of front fork 34 has bogie car 35.

By the engine E in the place ahead that is configured in trailing wheel WR be configured in power unit P that the stepless speed variator M in the left side of trailing wheel WR constituted and can be bearing on the front portion of two rear frame pipes 29,30 of vehicle body frame 25 with swinging up and down, trailing wheel WR axle is bearing in the rear portion of power unit P.And engine E is the cylinder single cylinder 4 stroke engines of horizontal arrangement substantially, and stepless speed variator M for example is the belt type speed changer.

Between the rear portion of power unit P and the left side rear frame pipe 29 among the pairing left and right rear frame pipe 29,30, be provided with vibration absorption unit 36.In addition, the outlet pipe 37 of the waste gas channeling conduct that engine E is produced extends to the side, right side of trailing wheel WR from engine E, and this outlet pipe 37 is connected with the muffler 38 of the side, right side that is configured in trailing wheel WR.

The article case 39 of the folding and unfolding helmet etc. is supported between the front portion of two rear frame pipes 29,30, and is positioned at the top of described engine E, and fuel tank 40 is supported between the rear portion of two rear frame pipes 29,30.

And power unit P can be bearing on the vehicle body frame 25 via shockproof connecting rod 41 with swinging up and down, and the structure for this shockproof connecting rod 41 describes in conjunction with Fig. 6～Fig. 8.

Shockproof connecting rod 41 has: the engine side support 42 that is arranged on the pairing left and right of bottom near the place ahead of power unit P, 42, be separately positioned on two rear frame pipes 29 of vehicle body frame 25,30 last oblique frame section 29a, the pairing left and right frame side support 43 of the bottom of 30a, 43, be configured in described two engine side supports 42, revolving drum cylindraceous 44 between 42, can make it to support rotationally to this revolving drum 44, be arranged on two engine side supports 42, connection shaft 45 between 42, be cross section and be that the tubular of rectangle forms, one end is fixed on the pairing left and right linkage component 46 on the described revolving drum 44,46, be configured in described two frame side supports 43, between 43, and described linkage component 46, the urceolus cylindraceous 47 that 46 the other end fixes with it, the inner core cylindraceous 48 of concentric arrangement in this urceolus 47, interior all sintering respectively are on two ends of inner core 48, and periphery is the rubber bushing 50... of the cylinder-like shell 49 of sintering in being pressed into two ends of described urceolus 47 respectively, can make it to support rotationally to described inner core 48, be arranged on described two frame side supports 43, swing fulcrum 51 between 43, be fixed on the axial intermediate portion of described urceolus 47, the arm 52 of Yan Shening forwards, and be installed in backstop rubber 53 on the front end of arm 52.

Described backstop rubber 53 is inserted in the rubber support part 31 of the rear end that is formed at main frame pipe 27, makes the upper and lower surface of backstop rubber 53 contact with the internal surface up and down of this rubber support part 31.

In aforesaid shockproof connecting rod 41, the load that acts on swing fulcrum 51 from the engine E of power unit P is absorbed by the resiliently deformable of rubber bushing 50..., simultaneously, being urged the resiliently deformable that produces by backstop rubber 53 on the internal surface up and down of rubber support part 31 is absorbed.

And, on two linkage components 46,46, be fixed with the protecting component 54,54 more outstanding than each linkage component 46,46 respectively, this protecting component 54,54 is in extreme lower position and is lower than frame side support 43 among than power unit P each parts more on the front.For these protecting components 54...,, for example rod iron (pipe) is bent to semicircle and form in order to make its intensity in light weight big.

Again in the lump with reference to Fig. 9, the suction system 57 of engine E has the sucking pipe 58 that is connected with the top of engine E, the vaporizer 59 that is connected with the upstream extremity of this sucking pipe 58, more be configured in the air-strainer 60 of the side, left side of trailing wheel WR than this vaporizer 59 by the rear, and connect air-strainer 60 and vaporizer 59, the synthetic resin manufacturing be connected flexible pipe 61; And be configured between article case 39 and the engine E.

In the lump with reference to Figure 10 and Figure 11, air-strainer 60 is positioned at the rear portion that leftwards is installed in power unit P on trailing wheel WR top again.In addition, connect flexible pipe 61 curved configuration in generally horizontal plane, the air-strainer 60 that is configured in the left side on trailing wheel WR top is coupled together with the vaporizer 59 that is configured in the place ahead of trailing wheel WR.

On the top that connects flexible pipe 61, be provided with integratedly from the outstanding upward upstanding wall 61a of this connection flexible pipe 61, be configured in connect flexible pipe 61 above the bottom of article case 39, be provided with downwardly depending wall 39a sagging and that forward lap at the place ahead and the described upstanding wall 61a of described trailing wheel WR integratedly downwards.And between upstanding wall 61a and downwardly depending wall 39a, form and to prevent that muddy water that trailing wheel WR throws away etc. from entering the place ahead that connects flexible pipe 61 is the maze path 62 of vaporizer 59 1 sides.

In addition, in the bottom that connects flexible pipe 61, be provided with integratedly from connect flexible pipe 61 sagging downwards, stop muddy water that trailing wheel WR throws away etc. to get rid of forwards retaining mud wall 61b.

Again in the lump with reference to Figure 12, the front portion of the upper frame part 29b among two rear frame pipes 29,30 on the rear frame pipe 29 in left side is supported with the secondary air that is used for purifying the secondary air of supplying with to the relief opening (not shown) of engine E with air-strainer 63.

Be connected with the downstream of sucking pipe 64 on the suction port of this secondary air with air-strainer 63, the upstream extremity of this sucking pipe 64 as shown in figure 13, the rearward end opening 30c of the upper frame part 30b among two rear frame pipes 29,30 on the rear frame pipe 30 on right side inserts end thereafter.And the upstream extremity of sucking pipe 64 is supported on the rear frame pipe 30 by the quieter material 65 between the internal surface that is compressive state and is clipped in its outer surface and rear frame pipe 30, quieter material 65 be by the elastic material with gas permeability for example sponge etc. constitute.That is, the upstream extremity of sucking pipe 64 is quieter material 65 is clipped between the internal surface of itself and rear frame pipe 30 and inserts among the rearward end opening 30c of rear frame pipe 30.

For the crooked sleekly back of sucking pipe 64 being inserted among the rearward end opening 30c of rear frame pipe 30, rear end lower to the opposing party's rear frame pipe 29 is cut,, gradually away from the inclined-plane 29c of rear frame pipe 30 sucking pipe 64 is disposed along this inclined-plane 29c to form along with tilting downwards.

Being located at engine E and secondary air is supported by the pole 67 on the top of the last oblique frame section 29a that is installed in left side rear frame pipe 29 with the secondary air control valve between the air-strainer 63 66, be configured in the rear of oblique frame section 29a with respect to described secondary air with air-strainer 63, this secondary air control valve 66 is configured in the place ahead of oblique frame section 29a and will goes up oblique frame section 29a and be clipped in itself and secondary air with between the air-strainer 63.

Among Figure 14, secondary air control valve 66 is by diaphragm type executive component 68, drive the switch valve 69 of its switchings and only allow air to constitute to the pilot valve 70 that the exhaust side of engine E flows with this diaphragm type executive component 68.

Diaphragm type executive component 68 has shell 71, with this shell 71 its peripheral part is carried out the axle 73 that metal that the central position of the barrier film 72 of clamping and an end and this barrier film 72 is connected is made.

Shell 71 is by body 74 and by being fastened on this body 74 and the outer cover 75 that the periphery of described barrier film 72 is the tightness clamping is constituted, between outer cover 75 and barrier film 72, form the negative pressure chamber 76 of a face that exposes this barrier film 72, and between body 74 and barrier film 72, form atmospheric pressure chamber 77.Central position at outer cover 75, have with being attached thereto be provided with, front end has the connecting tube portion 79 of throttle orifice 78, the negative pressure that communicates with negative pressure chamber 76 inside via described throttle orifice 78 is taken out pipeline 80 and is connected in the connecting tube portion 79, and this negative pressure is taken out pipeline 80 and is connected on the sucking pipe 58 of suction system 57.Like this, the negative pressure in the sucking pipe 58 will act on negative pressure chamber 76.

Valve rod 73 can be bearing on the body 74 vertically movably, and an end of this valve rod 73 directly links at the central position of atmospheric pressure chamber 77 1 sides and described barrier film 72.

As a kind of like this diaphragm type executive component 68, when the negative pressure in the sucking pipe 58 increases, the direction deflection that barrier film 72 reduces to negative pressure chamber's 76 volumes, valve rod 73 is to the left action of Figure 14.

Switch valve 69 has valve casing 81, be fixed on the valve body 82 on the other end of described valve rod 73 and be located at valve casing 81 and valve body 82 between Returnning spring 83.

Valve casing 81 is by described body 74 and be the air-suction cover 84 that tightness is fastened on this body 74 and constitute; The intercommunicating pore 86 that body 74 is provided with air flow path 85, ventilate road 85 and atmospheric pressure chamber 77 are communicated with, communicate with the upstream extremity of air flow path 85 and with the valve opening 87 of described valve rod 73 concentric arrangement, a side its described valve opening 87 opposite with described air flow path 85 be opened on central position valve seat 88, with and the concentric support tube portion 89 that is inserted in the described valve opening 87 in part; And, the valve rod that from valve opening 87, passes with one heart 73 with and can be entrenched in axially slidably in the described support tube portion 89.

Between described body 74 and air-suction cover 84, be formed with valve chamber 90.In addition, form the connecting tube portion 91 that communicates with valve chamber 90 on the air-suction cover 84, the downstream of pipeline 92 is connected on the connecting tube.And the upstream extremity of pipeline 92 is connected secondary air with on the air-strainer 63.

Described valve seat 88 is formed in the body 74 and towards valve chamber 90, is housed in the valve chamber 90 and the valve body 82 that can be located on the valve seat 88 is fixed on the other end of valve rod 73.

In addition, Returnning spring 83 is the helical formation of supporting tube portion 89 around described, be located between main body 74 and the valve body 82, its spring force to order about valve body 82 break away from valve seats 88 direction, promptly make the barrier film 72 of diaphragm type executive component 68 work to the direction of atmospheric pressure chamber 77 side deflections.

Pilot valve 70 ground are supported on the valve supporting plate 94 that is discoideus formation that central position has valve opening 93 and can open and close described valve opening 93, valve supporting plate 94 is tightness and is clipped in described body 74 and is fastened between the outer cover 95 on this body 74, makes described valve opening 93 be communicated with the downstream of air flow path 85.In addition, be formed with the valve chamber 96 that holds described pilot valve 70 between outer cover 95 and valve supporting plate 94, the upstream extremity of secondary air supply pipeline 98 is connected with described valve chamber 96 and is wholely set in the connecting tube portion 97 on the outer cover 95 in the earthing mutually.And the downstream of secondary air supply pipeline 98 is connected the bottom of engine E and communicate with the relief opening of engine E.

This secondary air control valve 66 is to be fastened on the top that is supported in the last oblique frame section 29a on the left side rear frame pipe 29 on the pole 67 by the lip part 77a that will be arranged on integratedly on the valve body 74.

In addition, the oblique bottom of frame section 29a on the left side rear frame pipe 29, be provided with and the connecting tube portion 99 that should go up oblique frame section 29a internal communication, be used for path 10 0 that cooling air in the stepless speed variator M of ultromotivity unit P in the future draws to be connected in the described connecting tube portion 99.

As shown in Figure 1, the body cover 101 that vehicle body frame 25 is synthesized resin manufacture covers, this body cover 101 has: the leg guard 102 that the place ahead of driver foot is covered up, link to each other with the bottom of leg guard 102 and can make cyclist's pin be placed on top wood clapper 103, and, link to each other with wood clapper 103 and side cover 104 that rear vehicle is covered from both sides.

Described article case 39 is covered by above-mentioned side cover 104 with fuel tank 40, the vehicle seat of taking for the cyclist, article case 39 is covered from the top 105 be installed in side cover 104 top and can folding.That is, wood clapper 103 be formed on the body cover 101 and be configured in bogie car 35 and vehicle seat 105 between,, dispose and be used for power unit P is bearing in frame side support 43... on the vehicle body frame 25 swingably more by the place, below than the rear end of wood clapper 103.

Front portion at the lower frame section 27b of main frame pipe 27 is fixed with supporting member 106, and above described lower frame section 27b, the central position of the anterior stay pipe 107 that extends to the left and right directions of motor bike is fixed on the described supporting member 106.In addition, vertically-arranged has rear portion stay pipe 108,108 on two ends of transverse tube 28, is fixed with a pair of table top supporting frame 109,109 that extends with lower frame section 27b on the upper end portion of two ends of described anterior stay pipe 107 and rear portion stay pipe 108,108 with paralleling.

As shown in Figure 6, front portion and rear portion in the left and right sides of wood clapper 103, be wholely set the lug boss 103a, the 103a that contact with the upper surface at the front portion of described table top supporting frame 109,109 and rear portion downwards highlightedly, by these lug bosses 103a, 103a... are fastened on the table top supporting frame 109,109, wood clapper 103 is supported on two table top supporting frames 109,109.

In Figure 15～Figure 17, about central position at wood clapper 103, from wood clapper 103 downwards highlightedly the box-shaped battery of integrally formed upper opening put case 110, the upper, open end that this battery puts case 110 can be installed in cover plate 111 cappings that the synthetic resin on the wood clapper 103 is made with freely installing and removing.

In battery puts case 110, put and be fixed with battery 112, CDI unit 113, starter relay 114 and Fuse box 115 etc.And, put at battery on the rear wall 110a of case 110, be provided be used for will be connected to the distribution 118 of described battery 112, CDI unit 113, starter relay 114 and Fuse box 115 etc. introduce batteries and put opening portion 117 in the case 110.

The rear end of the lower frame section 27b that passes through from the below of described wood clapper 103 among the vehicle body frame 25 is provided with and prevents that muddy water etc. from getting rid of the retaining mud parts of making to the synthetic resin of engine E side 120.

And these retaining mud parts 120 are installed on this transverse tube 28 with the state that the transverse tube on the rear end that will be fixed on lower frame section 27b 28 covers from the place ahead at least.

In Figure 18～Figure 23, retaining mud parts 120 are that the state that the transverse tube 28 with the rear end that will be fixed on lower frame section 27b covers from the place ahead at least forms, have and be integrally formed: the antetheca 120a that transverse tube 28 is covered from the place ahead, rearward horizontal-extending and the upper wall 120b that forms substantially from the upper end of antetheca 120a, the pair of sidewalls 120c, the 120d that link to each other with upper wall 120b with antetheca 120a, with and shape of cross section approximately be to the 120e of the cover portion U of under shed font, that forwards extend from the substantial middle position of antetheca 120a.

Described upper wall 120b covers transverse tube 28 from the top, and covers the two ends of described transverse tube 28 with two sidewall 120c, 120d.That is, retaining mud parts 120 be with transverse tube 28 from its place ahead, the state that covers of top and both sides forms.In addition, the 120e of rear portion quilt cover portion of lower frame section 27b covers from the top.

And in the up and down a pair of reinforcing member 32,32 that is located at for the joint to transverse tube 28 and main frame pipe 27 strengthens between transverse tube 28 and the main frame pipe 27 below on the reinforcing member 33, be provided with a pair of supporting arm 33a, the 33a that contact from the below with the left and right sides of the upper wall 120b of described retaining mud parts 120 integratedly, be fixed with welded nut 121... on these supporting arms 33a....On the other hand, be provided with a pair of through hole 122,122 at the position corresponding of described upper wall 120b with supporting arm 33a..., be screwed on the described welded nut 121... by the screw component 123... that will pass these through holes 122..., retaining mud parts 120 can be installed on two supporting arm 33a....

On the right side of the described cover 120e of portion, the top of antetheca 120a be provided be used for holding battery put case 110 the rear portion, right side hold recess 124.

In the bottom at least in the front of these retaining mud parts 120, this embodiment is the front that holds the antetheca 120a the recess 124 except described, is formed with the inclined-plane 125 that tilts to the front upper place.In addition,, also be formed with along with extending downwards to the inclined-plane 126,126 of inner inclination in the bottom of two sidewall 120c, 120d that the both ends open portion of transverse tube 28 is covered, the bottom at the two ends of transverse tube 28 also corresponding to inclined-plane 126... by oblique excision.

Though put the opening portion 117 that is provided with distribution 118 usefulness of in battery puts case 110, introducing on the rear wall 110a of case 110 at the battery that is integral setting on the wood clapper 103 with it, but on the upper wall 120b of retaining mud parts 120, the integrally formed highlightedly upward containment wall 127 that described opening portion 117 is covered from the rear.

Have again, through hole 122 than left side among the described two through hole 122,122 is located more on the front, front portion at upper wall 120b, form in the holding part 128 that upwards has a slit 129 and rounded formation week, just can hold them on this holding part 128 by the electric wire class is inserted from described slit 129.

Below, this embodiment's effect is described.Be used for can swing up and down the front portion of power unit P is bearing in pair of links parts 46... on the vehicle body frame 25 will be configured in than the rear end of wood clapper 103 more by the frame side support 43... of the part of the formation vehicle body frame 25 of below, links up with a pair of engine side support 42... that is located at the bottom of power unit P, on these linkage components 46..., be fixed with the protecting component 54... more outstanding respectively than this linkage component 46....And protecting component 54... is outstanding downwards to be in extreme lower position among than power unit P each parts more on the front and to be lower than the state of frame side support 43.

Therefore, in the time of on riding up to obstacle such as kerb, obstacle bumped against with protecting component 54... earlier before power unit P, and linkage component 46... rotates and power unit P is upwards lifted, and therefore, can avoid obstacle directly to bump against on the power unit P.And, only just can avoid obstacle to bump against on the power unit P in this very simple structure of fixed protection parts 54... on the linkage component 46....

And between power unit P and vehicle seat 105, dispose with the article case 39 of this vehicle seat 105 its upper end open portion capping, have the top that is connected engine E sucking pipe 58, be connected the upstream extremity of this sucking pipe 58 vaporizer 59, more be configured between engine E and the article case 39 than this vaporizer 59 by the air-strainer 60 of rear configuration and the suction system 57 that is connected flexible pipe 61 etc. that connects air-strainer 60 and vaporizer 59.And, the outstanding upward upstanding wall 61a that is provided with it on the top that connects flexible pipe 61, the sagging downwards downwardly depending wall 39a that is provided with it with bottom at article case 39 are configured on the position that forward laps the two with being integral with being integral, and the feasible maze path 62 that is used for preventing that muddy water that trailing wheel WR throws away etc. from entering the place ahead of connection flexible pipe 61 is formed between upstanding wall 61a and the downwardly depending wall 39a.

Therefore, can do one's utmost to stop muddy water that trailing wheel WR throws away etc. to get rid of to engine E one side that connects flexible pipe 61 the place aheads, and, do not need article case 39 and be connected flexible pipe 61 other parts in addition, therefore, can reduce number of components and reduce the workload of assembling operation.

In addition, in the bottom that connects flexible pipe 61, be wholely set floppily downwards and be used for stoping muddy water that trailing wheel WR throws away etc. to get rid of forwards retaining mud wall 61b from connecting flexible pipe 61, can stop muddy water that trailing wheel WR throws away etc. to get rid of more reliably to the place ahead that connects flexible pipe 61 by described retaining mud wall 61b.

In addition, vehicle body frame 25 has the lower frame section 27b that passes through from the below of wood clapper 103, is provided with to stop muddy water etc. to get rid of retaining mud parts 120 to engine E one side on the rear end of this lower frame section 27b.

Therefore, compare with the prior art that adopts cover of the large-scale end and can reduce component costs, and can prevent that muddy water etc. from getting rid of one side to engine E.

In addition, vehicle body frame 25 has the transverse tube 28 that extends and be fixed on the rear end of described lower frame section 27b to the left and right directions of vehicle body frame 25, the state formation of retaining mud parts 120 so that transverse tube 28 is covered from the place ahead at least, therefore, can in about gamut of the left and right directions of vehicle body frame 25, prevent that muddy water from getting rid of one side to engine E.

In addition, be formed with the inclined-plane 125 that tilts to the front upper place in the bottom at least in the front of retaining mud parts 120, to be thrown to muddy water on the retaining mud parts 120 etc. with described inclined-plane 125 and guide the rear and the below of retaining mud parts 120 into, thereby can prevent more reliably that muddy water etc. from getting rid of one side to engine E.

Put case 110 though on wood clapper 103, be provided with the battery that puts battery 112 grades, and put the opening portion 117 that is provided with distribution 118 usefulness of in battery puts case 110, introducing on the rear wall 110a of case 110 at this battery, but on described retaining mud parts 120, form the containment wall 127 that described opening portion 117 is covered from the rear.Therefore, special-purpose member needn't be set and prevent that just muddy water etc. from entering battery and putting in the case 110.

And retaining mud parts 120 are to form with the state that the both ends open portion with transverse tube 28 covers, and therefore, do not need to carry out the processing with the closed at both ends of transverse tube 28, can reduce labor content.

In addition, on retaining mud parts 120, form the holding part 128 of live wire cable class by the synthetic resin manufacturing, can keep with retaining mud parts 120 being configured near retaining mud parts 120 electric wire classes, do not need the special-purpose member that the electric wire class is kept is set, help to reduce number of components.

Have again; be used for making secondary air to the secondary air normalization that the vent systems of engine E is supplied with to be configured in the outside of vehicle body frame 25 with air-strainer 63 and be supported on the left of rear frame pipe 29 on, be convenient to secondary air is safeguarded with air-strainer 63.

And, be connected with the downstream of sucking pipe 64 on the suction port of secondary air with air-strainer 63, the upstream extremity of this sucking pipe 64 is with the state between the internal surface that quieter material 65 is clipped in itself and right side rear frame pipe 30, inserts among the rearward end opening 30c of this rear frame pipe 30.

Therefore, when being connected to rear frame pipe 30, sucking pipe 64 do not need to install other parts, thereby can reduce cost, in addition, between the internal surface of the upstream extremity of sucking pipe 64 and rear frame pipe 30, dispose the quieter material 65 that air can circulate, therefore, thus can reduce the air suction and noises that produce in the rear frame pipe 30 obtains erasure effect.

And, be located at engine E and secondary air with between the air-strainer 63 and to be supported in secondary air control valve 66 on the vehicle body frame 25 be the last oblique frame section 29a as the rear frame pipe 29 of the part of vehicle body frame 25 is clipped in the middle and is configured in described secondary air with the opposition side of air-strainer 63, therefore, secondary air can make secondary air is become simple with the structure that couples together between air-strainer 63 and the secondary air control valve 66 near configuration with air-strainer 63 and secondary air control valve 66.

Have again, vehicle body frame 25 has the rear end toward each other and the pairing left and right rear frame pipe 29,30 of opening at its rear portion, in the rearward end opening of upstream extremity insertion as a certain side's of these rear frame pipes 29,30 rear frame pipe 30 of sucking pipe 64, therefore, needn't be for sucking pipe 64 being connected on the rear frame pipe 30 and rear frame pipe 30 is processed in addition, can further reduce cost.

And, in the rear end toward each other and the rear end of the opposing party's rear frame pipe 29 among the pairing left and right rear frame pipe 29,30 of opening is formed with inclined-plane 29c, sucking pipe 64 carries in this inclined-plane 29c and disposes, therefore, sucking pipe 64 does not need to do very that macrobending just can insert among the rearward end opening 30c of described rear frame pipe 30, and the suction air in the sucking pipe 64 are flowed well.

More than be illustrated with regard to embodiments of the invention, but the present invention is not limited to the foregoing description, can also carry out various changes to design under the situation that does not exceed the scope of the present invention that claims put down in writing.

Claims (4)

1. the secondary air-supply device of a motor bike, part to the path that carries the vent systems feeding secondary air be contained in the engine (E) on the have frame tube vehicle body frame (25) of (30) is formed in the described frame tube (30), it is characterized in that, in the outside that is configured in described vehicle body frame (25), and being supported in the downstream that is connected with inhaling hose (64) on the suction port of secondary air on this vehicle body frame (25) with air-strainer (63), the upstream extremity of this inhaling hose (64) is quieter material (65) is clipped between the internal surface of itself and described frame tube (30) and inserts in this frame tube (30) open-ended.

2. the secondary air-supply device of motor bike as claimed in claim 1, it is characterized in that, be located at described engine (E) and secondary air with between the air-strainer (63) and to be supported in secondary air control valve (66) on the described vehicle body frame (25) be that a part with described vehicle body frame (25) is clipped in the middle and is configured in described secondary air with the opposition side of air-strainer (63).

3. the secondary air-supply device of motor bike as claimed in claim 1, it is characterized in that, described vehicle body frame (25) has the rear end toward each other and the pairing left and right frame tube of opening (29,30) at its rear portion, the upstream extremity of described sucking pipe (64) inserts in a certain side's (30) the rearward end opening (30c) of these frame tube (29,30).

4. the secondary air-supply device of motor bike as claimed in claim 3, it is characterized in that, the rear end of the opposing party's frame tube (29) among the frame tube (29,30) of described pairing left and right is formed with inclined-plane (29c), and described sucking pipe (64) carries over (29c) configuration in this inclined-plane.

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