CN101746474A - Engine structure of motor cycle - Google Patents
Engine structure of motor cycle Download PDFInfo
- Publication number
- CN101746474A CN101746474A CN200810185647A CN200810185647A CN101746474A CN 101746474 A CN101746474 A CN 101746474A CN 200810185647 A CN200810185647 A CN 200810185647A CN 200810185647 A CN200810185647 A CN 200810185647A CN 101746474 A CN101746474 A CN 101746474A
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- motor cycle
- engine structure
- engine
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- drive shaft
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Abstract
The present invention relates to an engine structure of a motor cycle. The engine is arranged on the rear of a descending pipe arranged on a cycle frame. The engine comprises a crank case, a cylinder body and a cylinder head, wherein the crank case consists of a left crank case and a right crank case, a crank, a main shaft, an output shaft and an engine fuel pump are arranged in the crank case, and the crank is connected to a piston by a connecting rod; the connecting rod and the piston are arranged in the cylinder body, and the center of the crank does not penetrate through the center of the cylinder body; a cam shaft, a rocker arm, an air inlet, an air outlet and a combustion chamber are arranged on the cylinder head; the cylinder body shifts toward the rear of the cycle body, the central line of the cylinder body shifted is between the center of the crank and the center of the main shaft, and the crank rotates clockwise. Thus, part configuration space before the engine can be effectively increased, and side friction produced when the piston runs is reduced. Meanwhile, the purpose in conveniently arranging an exhaust pipe is achieved.
Description
[technical field]
The invention relates to a kind of engine structure of motor cycle, especially refer to be offset towards the car body rear, whereby, can effectively increase portion's product configuration space in engine the place ahead in cylinder body with engine, and reduce the side-friction force that piston is produced when running, reach the convenient engine structure that freeing pipe is installed simultaneously.
[background technology]
The start of general vehicle, as motor bike, all-terrain vehicle ... Deng, be after fresh air that the external world is imported and fuel oil are mixed into oil gas, again the oil gas input engine is fired generation power, move reciprocatingly and promote piston, drive belt speed change mechanism via bent axle and carry out transmission, to reach the purpose of advancing.
And the engine 1 of vehicle sees also shown in Figure 1ly, includes cylinder head 11, cylinder body 12 and crankcase 13.
Crankcase 13, inside are to be provided with a bent axle 131, and this bent axle 131 is with connecting rod 121 and piston 122 interlocks.
Engine 1 is when start, be by the carburettor (not shown), air and fuel oil be mixed into follow admission port 111 by air inlet pipe behind the oil gas and import combustion chambers 113, utilize the igniting of igniting member to fire again, to produce powered piston 122 crank motions, and, rotate to drive trailing wheel by bent axle 131 drive speed change system starts.
And owing to this engine 1 is provided with in a upright mode, therefore the engine 1 of this vehicle can be partial to the downtake 2 of vehicle frame, and then cause this engine 1 the place ahead can't dispose O2 detector, fuel tank or water tank, and, also cause freeing pipe 14 to have the disappearance that is difficult for installation easily owing to be subjected to stopping of downtake 2.
Because existing engine 1 has above-mentioned disappearance, so will how to develop one can effectively increase the portion's product configuration space in engine the place ahead and the engine structure of convenient installation freeing pipe, real is the problem that at present relevant industry is needed to be resolved hurrily.
[summary of the invention]
Major technique means of the present invention are to provide a kind of engine structure of motor cycle, this engine is the rear that is arranged at vehicle frame downtake portion, and include: a crankcase, be to have a left crankcase and a right crankcase, this crankcase inside is provided with a bent axle, a main shaft, an output shaft and a lubricating oil pump, and this bent axle is to be linked to piston with connecting rod; One cylinder body, inside are provided with connecting rod and piston, and crankshaft center is not passed through at this cylinder body center; One cylinder head is provided with camshaft, rocking arm, inlet and outlet port and combustion chamber in cylinder head; Wherein, this cylinder body is to be offset towards the car body rear, making skew exhaust casing body line of centers is between the crankshaft center and the alignment of shafts, and turning to of bent axle is clickwise, whereby, can effectively increase portion's product configuration space in engine the place ahead, and reduce the side-friction force that piston is produced when running, reach the convenient effect that freeing pipe is installed simultaneously.
Of the present invention time a technological means is to provide a kind of engine structure of motor cycle, this engine is arranged at the rear of vehicle frame downtake portion, and include cylinder head, cylinder body and crankcase, this cylinder head is provided with a camshaft, this cylinder body inside is provided with connecting rod and piston, this crankcase inside is provided with a bent axle, this bent axle is to be linked to piston with connecting rod, be provided with a main shaft and an output shaft in this crankcase in addition, this main shaft is by the bent axle driven rotary, and this output shaft then rotates with the trailing wheel of final gear driven motor bike, wherein, turning to of this bent axle is clickwise, and be provided with a tween drive shaft between this main shaft and the output shaft, this tween drive shaft is provided with idle pulley, can adjust the hand of rotation of output shaft by this idle pulley, make the trailing wheel of motor bike be rotated in the forward, so that motor bike reaches the purpose of advancing.
Another technological means of the present invention is to provide a kind of engine structure of motor cycle, this engine is the rear that is arranged at vehicle frame downtake portion, and include cylinder head, cylinder body and crankcase, this cylinder head the place ahead is provided with a cylinder-head cover, is provided with a camshaft, a rocking arm, an inlet and outlet port and a combustion chamber in cylinder head inside; This cylinder body inside is provided with connecting rod and piston; This crankcase inside is provided with a bent axle, one main shaft, one output shaft and a lubricating oil pump, this bent axle is to be linked to piston with connecting rod, be provided with a main shaft and an output shaft in this crankcase in addition, this main shaft is by the bent axle driven rotary, this output shaft then rotates with the trailing wheel of final gear driven motor bike, wherein, turning to of this bent axle is clickwise, and be provided with a tween drive shaft between this bent axle and the main shaft, this tween drive shaft is provided with idle pulley, and this tween drive shaft is the below that is positioned at crankshaft center and alignment of shafts line, can effectively shorten the wheelbase between bent axle and the main shaft whereby, reaching effect, and can make the trailing wheel of motor bike be rotated in the forward, the purpose that motor bike is reached advance with the engine miniaturization.
[description of drawings]
Fig. 1 is the cross-sectional schematic of existing engine.
Fig. 2 is the schematic side view of motor bike of the present invention.
Fig. 3 is the cross-sectional schematic of motor engine of the present invention.
Fig. 4 is the schematic appearance of motor engine of the present invention.
Fig. 5 is the cross-sectional schematic of the other direction of motor engine of the present invention.
Fig. 6 is the schematic top plan view of engine cylinder head of the present invention.
Fig. 7 is the configuration schematic diagram of bent axle of the present invention, flywheel and electrical generator.
Fig. 8 is the scheme drawing of cylinder head of the present invention and time gear.
Fig. 9 is the schematic perspective view of timing chain of the present invention and tensioner.
Figure 10 is the cross-sectional schematic of another embodiment of the present invention.
Figure 11 is another embodiment of the present invention engine right side partial schematic sectional view.
1 engine, 11 cylinder heads, 111 admission ports
112 exhausr ports, 113 combustion chambers
114 camshafts, 12 cylinder body
121 connecting rods, 122 pistons
13 crankcases, 131 bent axles
14 freeing pipes
2 downtakes
3 motor bikes
4 steering hardwarees, 41 steering head pipes, 42 steering handles
Earth removal before the 43 front shock-proof device devices 44
52 downtake portions are responsible in 5 vehicle frame unit 51
53 reinforcement pipes, 54 bottom tubes
55 cross bars, 551 engine hangers
56 seat frames, 561 rear shock absorbers
The E power unit
6 engines, 60 freeing pipes, 61 cylinder heads
611 cylinder-head covers, 612 camshafts
612a camshaft center
6121 inlet cams, 61211 cam projections
6122 exhaust cams, 61221 cam projections
6123 time gear, 6124 timing chains
6125 tensioners, 6126 guide rods
613 rocking arms
614 air inlet ports, 6141 air intake valves
615 exhaust ports, 6151 drain taps
616 combustion chambers, 617 light-up plugs
62 cylinder body, 621 pistons
622 connecting rods, 623 cylinder busses
63 crankcase 63L left crankcases
63R right crankcase 631 bent axles
The 631a crankshaft center
The 632 main shaft 632a alignments of shafts
633 output shaft 633a output shaft centers
634 final gear 635 flywheels
6351 projections, 636 pulse wave inductors
637 driving chains
638 tween drive shaft 638a tween drive shaft centers
6381 idle pulleys
639 lubricating oil pump
7 fuel tanks
8 operator's saddles
9 back earth removals
F W front-wheel RW trailing wheel
Cylinder body center b skew exhaust casing body line of centers before a skew
The former camshaft of c center
[specific embodiment]
Be the effect that enables to be easier to understand structure of the present invention and can reach, cooperate graphic explanation as the back now:
At first, see also shown in Figure 2ly, motor bike 3 of the present invention includes steering hardware 4, vehicle frame unit 5, power unit 6, fuel tank 7, operator's saddle 8 etc. at least.
Steering hardware 4, mainly be to establish a steering handle 42 in steering head pipe 41 tops, in addition be connected with front shock-proof device device 43 in the below of steering head pipe 41, the below of this front shock-proof device device 43 supported by a front-wheel FW, between steering head pipe 41 and front-wheel FW, be provided with one before earth removal 44.
This vehicle frame unit 5 is that in addition, the centre of this steering head pipe 41 is extended with a downtake portion 52 downwards, is provided with a reinforcement pipe 53 between this person in charge 51 and the downtake portion 52 by steering head pipe 41 tops towards the rear and be the below and be extended with obliquely and be responsible for 51.
This downtake portion 52 extends to the left and right and goes out to have a pair of wedged bottom pipe 54 towards rear extension, these bottom tube 54 lower ends are connected with a cross bar 55, this cross bar 55 is provided with engine hanger 551, and be responsible for 51 rear end and be connected with a seat frame 56, this seat frame 56 is towards the rear and extends to the rear of car body, and at the forebody of this seat frame 56, be to be connected in to be responsible for 51 upper end, can constitute the rigidity intensity of seat frame 56 whereby.
In be responsible for 51 and downtake portion 52 between be provided with power unit E, and seat frame 56 from the front end of operator's saddle 8 to the rear extension of motor bike 3 to tailstock place; The below of seat frame 56 is equipped with rear shock absorber 561, and this rear shock absorber 561 is supported by trailing wheel RW.In addition, between seat frame 56 and trailing wheel RW, be provided with a back earth removal 9.
Power unit E sees also shown in Fig. 3,4,5, includes an engine 6 and a freeing pipe 60 at least.
Engine 6 includes cylinder head 61, cylinder body 62 and crankcase 63, and these cylinder head 61 the place aheads are provided with a cylinder-head cover 611, is provided with a camshaft 612, a rocking arm 613, an inlet and outlet port 614,615 and a combustion chamber 616 in cylinder head 61 inside.This camshaft 612 is provided with an inlet cam 6121 and an exhaust cam 6122, wherein, please cooperate and consult (arrow is represented the headstock direction) shown in Figure 6, the cam projection 61211 of this inlet cam 6121 is overlooked by cylinder head 61 and is seen down, with camshaft 612 center 612a is that axis of coordinate is on the four-quadrant that is positioned at, the cam projection 61221 of exhaust cam 6122 then is positioned on second quadrant of this axis of coordinate, by advancing, exhaust cam 6121,6122 touch air intake valve 6141 and drain tap 6151 starts that rocking arm 613 can drive air inlet port 614 and exhaust port 615, this rocking arm 613 is when implementing, implemented with the roller type rocking arm, after oil gas enters combustion chamber 616 by air inlet port 615, fire through light-up plug 617 igniting, the piston 621 that the gaseous tension of its expansion then can produce in the thrust promotion cylinder body 62 is done, under crank motion, when piston 621 descends, air intake valve 6141 is opened, the guiding mixed oil and gas enters combustion chamber 616 internal combustion, and waste gas after burning is then discharged rapidly by drain tap 6151 and is expelled in the freeing pipe 60 via exhaust port 615.Cylinder body 62 in-to-in pistons 621 are provided with connecting rod 622 and are connected with bent axle 631 in the crankcase 63.
Please consult shown in Fig. 8,9,10 again, this camshaft 612 is provided with time gear 6123 in the left side, these time gear 6123 are arranged with a timing chain 6124, this timing chain 6124 is to link with bent axle 631, can be and produce power via timing chain 6124 time of position and 6141,6151 unlatchings of inlet and outlet valve of control plunger 621 accurately, to keep the normal operation of engine 6 by bent axle 631.(arrow I is that expression air inlet port side, arrow O are expression exhaust port sides) as shown in Figure 9, wherein this timing chain 6124 is provided with a tensioner 6125 in the exhaust port of cylinder head 61 615 sides, and be provided with guide rod 6126 in air inlet port 614 sides, can adjust the elasticity of timing chain 6124 by this tensioner 6125, to control the time that inlet and outlet valve 6141,6151 is opened more accurately.
Crankcase 63, see also shown in Fig. 3,4,5, constituted by a left crankcase 63L and right crankcase 63R, these crankcase 63 inside are provided with a bent axle 631, a balance shaft 6311, a main shaft 632, an output shaft 633, a tween drive shaft 638 and a lubricating oil pump 639, this bent axle 631 is to be linked to piston 621 with connecting rod 622, this balance shaft 6311 is the tops that are positioned at bent axle 631 center 631a and main shaft 632 center 632a lines, is arranged with an idle pulley 6381 on this tween drive shaft 638; Please consult shown in Fig. 5,7 simultaneously, this bent axle 631 is provided with a flywheel 635, pulse wave inductor 636 in left crankcase 63L side, this flywheel 635 is provided with a projection 6351, when bent axle 631 rotates drive flywheel 635, projection 6351 on the pulse wave inductor 636 induction flywheels 635, these pulse wave inductor 636 exportable signals are given controller (for example: capacitive discharge ignition unit, electronic control unit) (Graphic Center does not draw) whereby, and this controller then can make firing unit (Graphic Center does not draw) do accurate igniting action; This main shaft 632 is can be by bent axle 631 driven rotary whereby, the final gear 634 that this output shaft 633 can drive in the crankcase 63 rotates, and drives trailing wheel RW rotation by the driving chain on the final gear 634 637, wherein, turning to of this bent axle 631 is to be clickwise, as shown in Figure 3; Shown in Fig. 3,5, be to be provided with a tween drive shaft 638 between this output shaft 633 and the main shaft 632, this tween drive shaft 638 is to be positioned at above or below output shaft 633 center 633a and the main shaft 632 center 632a, effectively shorten the wheelbase between output shaft 633 and the main shaft 632 whereby, make the engine miniaturization and can reach; In addition, this lubricating oil pump 639 is the belows that are arranged at bent axle 631 center 631a and tween drive shaft 638 center 638a lines, and is arranged in left crankcase 63L.
The present invention is offset towards the car body rear by the cylinder body 62 with engine 6, cylinder body 62 of the present invention is to be offset towards the car body rear, and cylinder body 62 line of centers a are offset before making this skew, form skew exhaust casing body 62 line of centers b, and then to make this skew exhaust casing body 62 line of centers b be between the center of bent axle 631 631a and main shaft 632, whereby, can effectively increase engine 6 front part product (as water tank, radiator, Lambda sensor ... etc.) configuration space, and can reduce piston 621 side-friction force that countercylinder lining 623 is produced when running, reach the convenient effect that freeing pipe 60 is installed simultaneously, this skew exhaust casing body 62 line of centers b are by camshaft 612 center 612a in addition, more can increase the configuration space at cylinder body 62 and cylinder head 6 places.In addition, as shown in Figure 3, because turning to of this bent axle 631 is to be clickwise, and a tween drive shaft 638 is set between main shaft 632 and output shaft 633, can be by these tween drive shaft 638 upper idlers 6381 auxiliary, change the hand of rotation of final gear 634 on the output shaft 633, make the trailing wheel RW of motor bike 3 be rotated in the forward, so that motor bike 3 reaches the purpose of advancing.
Please consult shown in Figure 10,11 again, the present invention is when implementing, also this can be provided with tween drive shaft 638 between bent axle 631 and main shaft 632, and this tween drive shaft 638 is the belows that are positioned at bent axle 631 center 631a and main shaft 632 center 632a lines, can effectively shorten the wheelbase between bent axle 631 and the main shaft 632 whereby, reaching effect with engine 6 miniaturizations, and auxiliary by these tween drive shaft 638 upper idlers 6381, the purpose that motor bike 3 trailing wheel RW are rotated in the forward adjusted and can reach.
In sum, engine structure of motor cycle of the present invention is not comparatively commonly used the person really and is promoted effect, shows the important document that has had novelty and progressive.
Claims (20)
1. engine structure of motor cycle, this engine is the rear that is arranged at vehicle frame downtake portion, and includes:
One crankcase has a left crankcase and a right crankcase, and this crankcase inside is provided with a bent axle, a main shaft, an output shaft and a lubricating oil pump, and this bent axle is to be linked to piston with connecting rod;
One cylinder body, inside are provided with connecting rod and piston, and this skew exhaust casing body line of centers does not pass through crankshaft center;
One cylinder head is provided with camshaft, rocking arm, inlet and outlet port and combustion chamber in cylinder head;
It is characterized in that: this cylinder body is towards car body rear skew, and making the cylinder body line of centers after the skew is between the crankshaft center and the alignment of shafts, and turning to of bent axle is clickwise.
2. engine structure of motor cycle as claimed in claim 1 is characterized in that: this crankcase also includes a tween drive shaft, and this tween drive shaft is between main shaft and output shaft, and this tween drive shaft also is provided with idle pulley.
3. engine structure of motor cycle as claimed in claim 1 is characterized in that: this crankcase also includes a tween drive shaft, and this tween drive shaft is between bent axle and main shaft, and this tween drive shaft and be provided with idle pulley.
4. engine structure of motor cycle as claimed in claim 2 is characterized in that: this tween drive shaft is positioned at above or below the alignment of shafts and the output shaft line of centres.
5. engine structure of motor cycle as claimed in claim 2 is characterized in that: this main shaft is to be positioned at crankshaft center and tween drive shaft line of centres top.
6. engine structure of motor cycle as claimed in claim 3 is characterized in that: this tween drive shaft is the below that is positioned at crankshaft center and alignment of shafts line.
7. engine structure of motor cycle as claimed in claim 1 is characterized in that: this crankcase also includes a balance shaft.
8. engine structure of motor cycle as claimed in claim 7 is characterized in that: this balance shaft is to be positioned at crankshaft center and alignment of shafts line top.
9. engine structure of motor cycle as claimed in claim 1 is characterized in that: this camshaft is provided with an inlet cam and an exhaust cam.
10. engine structure of motor cycle as claimed in claim 9 is characterized in that: the cam projection of this inlet cam is overlooked direction by cylinder head, is that axis of coordinate is positioned at four-quadrant with the cylinder center.
11. engine structure of motor cycle as claimed in claim 9 is characterized in that: the cam projection of this exhaust cam is overlooked direction by cylinder head, is that axis of coordinate is positioned at second quadrant with the cylinder center.
12. engine structure of motor cycle as claimed in claim 1 is characterized in that: this camshaft is provided with time gear in the left side, and these time gear are arranged with a timing chain.
13. engine structure of motor cycle as claimed in claim 12 is characterized in that: this timing chain is provided with a tensioner in the exhaust port of cylinder head side, and is provided with guide rod in air inlet port side.
14. engine structure of motor cycle as claimed in claim 1 is characterized in that: a side of this bent axle is provided with a flywheel and a pulse wave inductor.
15. engine structure of motor cycle as claimed in claim 14 is characterized in that: this flywheel is provided with a projection, and this projection is arranged at the place ahead of pulse wave inductor towards headstock the place ahead.
16. engine structure of motor cycle as claimed in claim 14 is characterized in that: this flywheel is located at left crankcase.
17. engine structure of motor cycle as claimed in claim 1 is characterized in that: this lubricating oil pump is the below that the crankshaft center and the tween drive shaft line of centres are set.
18. engine structure of motor cycle as claimed in claim 1 is characterized in that: this rocking arm is the roller type rocking arm.
19. engine structure of motor cycle as claimed in claim 1 is characterized in that: this cylinder head is provided with a cylinder-head cover.
20. engine structure of motor cycle as claimed in claim 1 is characterized in that: the center of cylinder body is by the camshaft center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810185647A CN101746474A (en) | 2008-12-17 | 2008-12-17 | Engine structure of motor cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810185647A CN101746474A (en) | 2008-12-17 | 2008-12-17 | Engine structure of motor cycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101746474A true CN101746474A (en) | 2010-06-23 |
Family
ID=42474243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810185647A Pending CN101746474A (en) | 2008-12-17 | 2008-12-17 | Engine structure of motor cycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101746474A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632995A (en) * | 2013-11-07 | 2015-05-20 | 光阳工业股份有限公司 | Auxiliary device for balance shaft |
| CN105691538A (en) * | 2014-11-28 | 2016-06-22 | 苏州工业园区同盛车业有限公司 | Mid-set motor of electric bicycle |
| WO2021083240A1 (en) * | 2019-10-28 | 2021-05-06 | 浙江春风动力股份有限公司 | Straddle-type vehicle |
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| CN1123877A (en) * | 1995-08-22 | 1996-06-05 | 张贵生 | Crank mechanism of reciprocating piston internal-combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632995A (en) * | 2013-11-07 | 2015-05-20 | 光阳工业股份有限公司 | Auxiliary device for balance shaft |
| CN105691538A (en) * | 2014-11-28 | 2016-06-22 | 苏州工业园区同盛车业有限公司 | Mid-set motor of electric bicycle |
| CN105691538B (en) * | 2014-11-28 | 2017-12-26 | 苏州工业园区同盛车业有限公司 | Electric bicycle motor |
| WO2021083240A1 (en) * | 2019-10-28 | 2021-05-06 | 浙江春风动力股份有限公司 | Straddle-type vehicle |
| US11332211B2 (en) | 2019-10-28 | 2022-05-17 | Zhejiang CFMOTO Power Co., Ltd. | Straddle-type vehicle |
| EP3939872B1 (en) | 2019-10-28 | 2023-03-29 | Zhejiang CFMOTO Power Co., Ltd. | Straddle-type vehicle |
| US11919603B2 (en) | 2019-10-28 | 2024-03-05 | Zhejiang Cfmoto Power Co. Ltd. | Straddle-type vehicle |
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Application publication date: 20100623 |