CN1262198A

CN1262198A - Bicycle with internal combustion engine

Info

Publication number: CN1262198A
Application number: CN00101192A
Authority: CN
Inventors: 沼田英彦
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1999-01-29
Filing date: 2000-01-28
Publication date: 2000-08-09
Anticipated expiration: 2020-01-28
Also published as: JP2000220449A; FR2789021B1; ITTO20000073A1; IT1319809B1; CN1200843C; KR100342973B1; FR2789021A1; TW581148U; KR20000064061A

Abstract

A bicycle with internal combustion engine is provided with a pedal to make it run by human power and an internal combustion engine installed under a body frame forming almost V-shape by a main frame and a seat post. A muffler 50 is attached between the internal combustion engine and a rear wheel. An exhaust pipe 45 extending from the exhaust port of the internal combustion engine is turned back below the internal combustion engine in a longitudinal direction and then connected to the muffler.

Description

Band combustion engine bicycle

The present invention relates to a kind of band combustion engine bicycle, particularly a kind of configuration of silencer.

The example that disposes the band combustion engine bicycle of combustion engine in the vehicle frame bottom is put down in writing as the illustrated Japanese kokai publication hei 8-108875 communique of Fig. 7, vehicle frame forms vee shape by the past standpipe 01 extended girder 02 and saddle column jecket 03, at vehicle frame bottom configuration combustion engine 04.

The kink of the vee shape of girder 02 and saddle column jecket 03 is equipped with Fuel Tank 05, and and the trailing wheel 06 at the rear of saddle column jecket 03 between configuration be up and down the goods basket 07 of length direction.

In addition, configuration silencer 08 between combustion engine 04 and trailing wheel 06, from the extended freeing pipe 09 of the deflation hole of combustion engine 04 below combustion engine backwards approximate horizontal extend, and be connected with aforementioned silencer 08.

Require to have basically the shape of bicycle for band combustion engine bicycle, width over sides of car body is narrower, each instrument also is placed in the narrower width over sides of car body, to keep the light and handy outward appearance of bicycle, at this, silencer 08 utilizes the spatial allocation between combustion engine 04 and the trailing wheel 06, so silencer 08 is near combustion engine 04, freeing pipe 09 shortens, and can not obtain to guarantee the freeing pipe length of the abundance of good exhaust efficiency.

Given this, the object of the invention is to provide a kind of band combustion engine bicycle that disposes silencer between combustion engine and trailing wheel, and it can obtain to guarantee the sufficient freeing pipe length of good exhaust efficiency.

For achieving the above object, band combustion engine bicycle of the present invention, having can the manually driven pedal, simultaneously combustion engine is arranged on the vehicle frame bottom that roughly becomes vee shape to form by girder and saddle column jecket, between described combustion engine and the trailing wheel silencer is set, below described combustion engine, is connected with described silencer to the back of turning back towards front and back from the extended freeing pipe of the deflation hole of described combustion engine.

Because freeing pipe is being connected with the silencer that is configured between combustion engine and the trailing wheel to the back of turning back towards front and back below the combustion engine, so can obtain to guarantee the freeing pipe length of the abundance of good exhaust efficiency.

The described invention of claim 2 is in the described band combustion engine of claim 1 bicycle, to it is characterized in that the return portion of described freeing pipe is in the left and right sides width of described pedal width.

Freeing pipe can with the hands-off while of pedal, outstanding towards the width over sides of car body direction, can not damage the light and handy outward appearance of bicycle.

The described invention of claim 3 is in claim 1 or 2 described band combustion engine bicycles, to it is characterized in that described silencer is provided with freeing pipe and tail gas exhausting pipe by dividing plate being clamped between the halved body to become to constitute on arbitrary halfbody.

Only freeing pipe and tail gas exhausting pipe are set on a side halfbody, and on the opposing party's halfbody, there is no need to install any parts, assembling is simplified.

The described invention of claim 4 is, in the described band combustion engine of claim 3 bicycle, it is characterized in that, described silencer becomes constituting between the upside halfbody of going up lower semi-body and the downside halfbody by dividing plate is clipped in.

The setting degree of freedom that freeing pipe is inserted the width over sides of car body direction position of silencer becomes big, is easy to the design of freeing pipe.

Fig. 1 is the unitary side view of the band combustion engine bicycle of one embodiment of the invention,

Fig. 2 is the lateral plan of airfilter and near member thereof,

Fig. 3 is the cutaway view along Fig. 2 III-III line,

Fig. 4 is the cutaway view along Fig. 2 IV-IV line,

Fig. 5 is the birds-eye view that freeing pipe and noise reduction general ability are cutd open,

Fig. 6 is the cutaway view along Fig. 5 VI-VI line,

Fig. 7 is in the past with the lateral plan of combustion engine bicycle.

Below, according to Fig. 1-Fig. 6 one embodiment of the invention are described.

Fig. 1 illustrates the band combustion engine bicycle 1 unitary side view of present embodiment.

Vehicle frame 2 standpipe 3 in the past extends to the general plan declivity girder 4 backward, and the saddle column jecket 5 of summary towards rear extension is set at its rear, thereby side-looking is seen and roughly become vee shape.

Saddle column jecket 5 is from extending a little downwards with the junction surface of girder 4, pair of right and left rear pole 6 horizontal-extending rearward after its bottom is rearward tiltedly extended then halfway horizontal curvature earlier down, and pair of right and left rear pole 7 tiltedly extends down towards the rear from the top of saddle column jecket 5, the rear end of two

rear poles

6,7 combines with rear-wheel bearing portion 8.

8 trailing wheels 9 of rear-wheel bearing portion, rear mudguard 10 covers the upside at trailing wheel 9.

In addition, support 19 can be installed in the rear-wheel bearing portion 8 with freely swinging.

The lower end axle that can rotate freely the front fork 11 on the earth's axis Zhi Zaiqian standpipe 3 is propping up front-wheel 12, and in the upper end handle 14 is installed.

Front fender apron 13 covers the upside at front-wheel 12.

Fuel Tank 15 is being established from aforementioned girder 4 striding up to central authorities with junction surface preceding standpipe 3, and seat 16 is installed in the upper end of saddle column jecket 5.

The below of vee shape vehicle frame 2 is hanging the compact internal combustion engine 20 of 4 stroke cycle, 1 cylinder.

Carriage 17 is fixed on the junction surface of girder 4 and saddle column jecket 5 and vertical the establishing towards the below, its lower end is by the front side assemble frame on the crankcase 20a top of bolster 17a supporting combustion engine 20, and the outstanding carriage 18 that is arranged on aforementioned rear pole 6 front portions is supporting the rear side assemble frame of combustion engine 20 by bolster 18a.

Combustion engine 20, cylinder 20b upwards protracts sideling from crankcase 20a, and the rear of crankcase 20a and change speed gear box 21 are integral setting.

From change speed gear box 21 towards about on the outstanding output shaft 21a, by free-wheel clutch, be provided with pedal crank shaft 22 and drive sprocket 23, and and be arranged in the aforementioned rear-wheel bearing portion 8 by movable sprocket 24 between set up chain 25.

End is gone up setting-in pedal arm 26 respectively about pedal crank shaft 22, and its front end can rotate freely the earth's axis and prop up pedal 27.

So because the driving of combustion engine 20, by change speed gear box, drive sprocket 23 rotations through chain 25, make trailing wheel 9 rotations, can realize walking, and are same by pedal pedal 27 simultaneously, through chain 25, make trailing wheel 9 rotations, also can realize walking.

Rear and the space between the trailing wheel 9 at saddle column jecket 5 are provided with airfilter 30 and the battery 31 that is accommodated in the shared box 32.Box 32 is a split shape up and down, and the flat casing in top constitutes air cleaner box 32a, and the flat casing in bottom becomes battery and accepts box 32b, and the right side has the general-duty rectangular aperture, and cover 33 clogs this opening, and cover 33 tightens on the box 32 by 2 place's screws 34.

With reference to Fig. 2, box 32 sides see and are roughly rectangle, are surrounded by saddle column jecket 5 and trailing wheel 9 before and after being inlaid in and in the coffin that surrounded by

rear pole

6,7 up and down.

Front and the outstanding respectively installation sheet 32c that is provided with of lower surface at

box

32,32d, the installation sheet 32c of front side tightens to from the saddle column jecket 5 outstanding carriage 5a that are provided with by screw-nut 35 and goes up (with reference to Fig. 3), and the installation sheet 32d of downside tightens to from the downside rear pole 6 outstanding carriage 6a that are provided with last (with reference to Fig. 4) by screw-nut 36, and box 32 installs on the vehicle frame 2.

As Fig. 3, shown in Figure 4, airfilter 30 is to become fabricate block by clamping air-filtering device 30a between air cleaner box 32a and the cover 33, and inside is separated into the clean side part of right side dirty side part 30b and left side 30c by air-filtering device 30a.

Saddle column jecket 5 extends along the vertical direction in the front of airfilter 30 central authorities, from the front of airfilter 30 saddle column jecket 5 is clamped between the connection pipe 38 in the induction pipe 37 on right side and left side and extends towards the place ahead.

Induction pipe 37 on saddle column jecket 5 right sides passes cover 33, inserts in the dirty side part 30b, and the connection pipe 38 in saddle column jecket 5 left sides passes air cleaner box 32a, inserts clean side part 30c.

From the front, left side of air cleaner box 32a towards the place ahead extended connection pipe 38, after the left side faced downwards bending of saddle column jecket 5 once more towards the place ahead bending, and extend along the left surface of carriage 17, the junction surface 38a of front end engages with carburetter 40 above being configured in crankcase 20a.

In addition, connection pipe 38 is in than between left side pedal arm 26 carriage 17 more on the right side.

So, tiltedly go up extended aspirate tube 39 towards the rear from the cylinder 20b that leans forward sideling and be connected with the carburetter 40 that is positioned at cylinder 20b oblique upper.

Because carburetter 40 slightly is provided with near the left side from car body central authorities, and with airfilter 30 bonded assembly connection pipes 38 are left surfaces along saddle column jecket 5, so connection pipe 38 can reduce inspiratory resistance along the straight extension of fore-and-aft direction.

In addition, owing to adopted airfilter 30 and battery 31 to be arranged in the shared box 32, cover 33 clogs the structure of the shared opening in right side, not only parts are few, packaging efficiency is high, open cover 33, just can easily carry out the maintenance such as replacing of air-filtering device 30a and the operations such as replacing of battery 31.

Battery 31 is to insert battery to accept the box 32b from the car body right side, and covers with cover 33, therefore is difficult for seeing from the outside.

Below owing to be arranged on airfilter 30 as the battery 31 of weight can lower the center of gravity.

In addition, between the rear surface of the bending of change speed gear box 21 and trailing wheel 9 below in the open space of expansion silencer 50 is set gradually.

The installation sheet 56 that is vertically set on the upside box 51 of silencer 50 tightens to from the outstanding carriage 21b that is provided with in the crooked rear surface of change speed gear box 21 by screw-nut, hangs and is establishing silencer 50.

Lower surface from the extended freeing pipe 45 of the front side deflation hole of cylinder 20b along the cylinder 20b that tiltedly leans forward, rearward tiltedly extend down, further approximate horizontal is rearward extended agley below crankcase 20a, and S shape of fore-and-aft direction is connected with silencer 50 around bent ground between silencer 50.

As shown in Figure 5, freeing pipe 45 is from extending than car body Central Line L-L ' deflation hole more on the right side, move towards the left side at the rake 45a place of tiltedly extending down towards the rear, curve 45b in the approximate horizontal bending, extend towards the rear abreast with the L-L ' of car body Central Line, form the 1st line part 45c, in silencer 50 fronts, become the curve 45d of U font to extend by right lateral bending towards the place ahead, to form the 2nd line part 45e, at the anterior position place identical with aforementioned curve 45b, become the curve 45f of U font to extend towards the rear by right lateral bending once more, to form the 3rd line part 45g, the 3rd line part 45g extends towards the rear, and keeps this state ground to insert in the silencer 50.

The the 1st, the 2, the 3rd line part 45c of freeing

pipe

45,45e, 45g all are on the same horizontal surface of the lower surface of crankcase 20a and change speed gear box 21,

curve

45d, 45f is in the left and right sides width of silencer 50, makes single-piece left and right sides narrowed width, between left and right sides pedal arm 26.

As shown in Figure 5 and Figure 6, silencer 50 is overlooked and is rectangle, and isolator 53 is clamped between upside box 51 and the downside box 52, and by being welded into fabricate block, the upside space that is separated by isolator 53 is the 1st expansion chamber 51a simultaneously, and lower side space is the 2nd expansion chamber 52a.

Upside box 51 be the front along change speed gear box 21 crooked rear surfaces, and the rear surface is along the shape of trailing wheel 9 and be housed between the two.

In the 2nd expansion chamber 52a in the downside box 52 of freeing pipe 45 insertion silencers 50, it prolongs the pipe 45h of portion and extends towards the rear in inside, bend to the U font, and by support column 58 supportings, after extending towards the place ahead a little, towards the top bending, pass isolator 53, the upper end is from the 1st expansion chamber 51a inner opening of isolator 53 at upside.

The communicating pipe 54 of passing isolator 53 is set in addition, and is communicated with, connect the tailpipe 55 and the 2nd expansion chamber 52a and the external communications of the rear wall setting of downside box 52 with the 1st expansion chamber 51a and the 2nd expansion chamber 52a.

So the waste gas of combustion engine 20 by guaranteeing the freeing pipe 45 to set a distance, at first enters the 1st expansion chamber 51a along front and back S shape ground, and by the 1st expansion chamber 51a through entering the 2nd expansion chamber 52a communicating pipe 54, discharge towards the outside from tail pipe 55.

Because silencer 50 is not that freeing pipe 45 and tail gas exhausting pipe 55 are arranged on the upside box 51, and is arranged on the downside box 52, make and assemble simple, mould decreased number, improve the assembling performance.

In addition, isolator 53 welding, can guarantee air-tightness because upside box 51 and downside box 52 are clampings.

Have again, because silencer 50 for being provided with the structure of the 1st expansion chamber 51a and the 2nd expansion chamber 52a up and down two halves, the setting degree of freedom that makes freeing pipe 45 insert the position of the car body left and right sides Width in the silencer 50 becomes big, realizes along the design of the freeing pipe 45 of fore-and-aft direction S shape easily.

This band combustion engine bicycle 1 is the shape of bicycle basically, requires width over sides of car body narrow, and each instrument also folding and unfolding and is kept the light and handy outward appearance of bicycle in narrow width over sides of car body.

At this, silencer 50 is not configured in the side of trailing wheel 9, but utilize the change speed gear box 21 in the place ahead and the spatial allocation between the trailing wheel 9 on the middle position of the left and right sides, therefore, make the distance of the deflation hole of cylinder 20b and silencer 50 near, freeing pipe shortens, by freeing pipe is provided with along front and back S shape, guaranteed to have the freeing pipe length of the abundance of good exhaust efficiency.

The freeing pipe 45 of S shape is owing to its curve 45d in addition, and 45f is in the pedal width, makes the narrowed width ground folding and unfolding of the whole left and right sides between pedal arm 26, and freeing pipe is outstanding towards the width over sides of car body direction, can not diminish the light and handy outward appearance of bicycle.

In addition, airfilter 30 and battery 31 also utilize not utilizing the space and be configured on the Width middle position of the left and right sides between saddle column jecket 5 and the trailing wheel 9.

Extend from left and right sides clamping induction pipe 37 and connection pipe 38 therebetween owing to will be configured in the saddle column jecket 5 of the airfilter 30 at saddle column jecket 5 rears, induction pipe 37 and connection pipe 38 can not interfere the 5 ground folding and unfoldings of saddle column jecket in the width of the needed left and right sides.

Claims

1. be with the combustion engine bicycle for one kind, but has the manually driven pedal, simultaneously combustion engine is arranged on the vehicle frame bottom that roughly becomes vee shape to form by girder and saddle column jecket, it is characterized in that, between described combustion engine and the trailing wheel silencer is set, below described combustion engine, is connected with described silencer to the back of turning back towards front and back from the extended freeing pipe of the deflation hole of described combustion engine.

2. according to the described band combustion engine of claim 1 bicycle, it is characterized in that the return portion of described freeing pipe is in the left and right sides width of described pedal width.

3. according to claim 1 or 2 described band combustion engine bicycles, it is characterized in that described silencer all is provided with freeing pipe and tail gas exhausting pipe by becoming fabricate block to constitute between the halved body that dividing plate is clamped in two halves on arbitrary halfbody.

4. according to the described band combustion engine of claim 3 bicycle, it is characterized in that described silencer becomes up and down by dividing plate is clamped in that the upside halfbody of two halves and the fabricate block between the downside halfbody constitute.