CN104533565B - A kind of motorcycle engine pressure-reduction starting device - Google Patents
A kind of motorcycle engine pressure-reduction starting device Download PDFInfo
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- CN104533565B CN104533565B CN201410820250.XA CN201410820250A CN104533565B CN 104533565 B CN104533565 B CN 104533565B CN 201410820250 A CN201410820250 A CN 201410820250A CN 104533565 B CN104533565 B CN 104533565B
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- pressure release
- centrifugal
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- release pin
- cam
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Abstract
The invention discloses a kind of motorcycle engine pressure-reduction starting device, including camshaft, timing driven sprocket, exhaust cam side on camshaft is provided with the pressure release pin-and-hole for traversing, pressure release pin-and-hole is located at exhaust cam basic circle segment limit and near exhaust cam lift section, pressure release pin is sliding combined with pressure release pin-and-hole, the first flexible member is connected with pressure release pin, pressure release pin is connected with cam mandrel by the other end, the cam mandrel rotatably coordinates in the mesopore that camshaft is provided with；Driven sprocket lateral surface is provided with rotatable centrifugal-block, the second flexible member for centrifugal-block Self-resetting is connected with the centrifugal-block, centrifugal-block is provided with the part that cam mandrel is stretched out on the outside of timing driven sprocket and swings the torque transfer arrangement swung with moving cam mandrel for centrifugal-block.Be not destroyed the beneficial effects of the invention are as follows, cam base circle, the abrasion without exception of exhaust rocker arm working face, and the unstressed concentration hidden danger of distribution cam axle, and engine noise is small, long lifespan, security are good.
Description
Technical field
The present invention relates to a kind of starter of motorcycle engine, particularly a kind of motorcycle engine decompression starting dress
Put.
Background technology
Motorcycle is a kind of convenient vehicles throughout town and country.Motorcycle engine is the heart of motorcycle, motorcycle
Startup is realized by engine start.Motorcycle engine starts to working condition by stopped status to be needed outside by starting
Power overcomes the resistance of start to realize, engine horsepower is bigger, and the correspondence resistance of start is bigger.The Starting mode of motorcycle engine includes
Electrically activate and start with pin, it is that, by pressing start button, by startup electric motor starting, pin starts to be passed through by the personnel of riding to electrically activate
Starting bar is scrunched, using the dynamic start of pedal.Therefore, start in 200CC and with mo(u)ld top half for high-powered engine such as discharge capacity
The motorcycle of machine, its not only pin start laborious, and electrically activate high energy consumption.Therefore, those skilled in the art adopts through great efforts
Overcome with the mode for setting pressure-reduction starting device.Existing pressure-reduction starting device generally all be set a decompression member, with
In start-up course, once arranged in advance by decompression member jacking rocking arm before exhaust cam opens exhaust valve by exhaust rocker arm
Valve opening, so that cylinder pressure release, reduces the resistance of start, reaches the purpose of decompression starting；Engine work (including
Idling mode) when, decompression member disengages it from exhaust valve rocker by centrifugal action, to avoid cylinder pressure during normal work from dropping
It is low.Existing decompression member is usually with the rod member parallel to camshaft, and Rod end is hidden in one section of basic circle working face of cam
On.Accordingly, it would be desirable to form a breach in the section of cam base circle, so as to cause cam base circle to be destroyed, the breach can cause to shake
Arm working face inordinate wear, meanwhile, also there is the fault of construction of stress concentration in the breach, be easily caused camshaft and heat treatment occur
Crackle or early fatigue are damaged；In addition, the rod member is away from camshaft center, can form larger during with cam axle
Eccentric moment, has aggravated camshaft bearing abrasion.For this reason, it may be necessary to further improve.
The content of the invention
The present invention seeks in view of the shortcomings of the prior art, there is provided a kind of motorcycle engine pressure-reduction starting device, cam
Basic circle is not destroyed, the abrasion without exception of exhaust rocker arm working face, and the unstressed concentration hidden danger of distribution cam axle.
To achieve the above object, the present invention is adopted the following technical scheme that.
A kind of motorcycle engine pressure-reduction starting device, including camshaft, timing driven sprocket, camshaft and timing are driven
Sprocket wheel is fixedly connected by mounting flange, and the exhaust cam side on the camshaft is provided with the pressure release pin-and-hole for traversing, pressure release
Pin-and-hole is located in exhaust cam basic circle section phase range in the phase of camshaft, and near exhaust cam lift section, pressure release pin-and-hole
The pressure release pin for jack-up exhaust valve rocker is inside sliding combined with, the first bullet for pressure release pin Self-resetting is connected with pressure release pin
Property element, pressure release pin is connected with cam mandrel by the other end, and the cam mandrel rotatably coordinates in camshaft is provided with
In hole；The driven sprocket lateral surface is provided with rotatable centrifugal-block, is connected with the centrifugal-block for centrifugal-block Self-resetting
The second flexible member, the part that centrifugal-block and cam mandrel are stretched out on the outside of timing driven sprocket is provided with torque transfer arrangement, should
Torque transfer arrangement is used for centrifugal-block and swings the mandrel swing of band moving cam.
Using the present invention of preceding solution, when engine is in shutdown or the slow-speed of revolution of startup stage, centrifugal-block
Tightening state in Self-resetting, pressure release pin by cam mandrel cam working face effect make its head stretch out and jack-up exhaust shake
Arm makes cylinder pressure release；By rationally setting the parameter of centrifugal-block runback bit unit, make engine speed close to idling mode
During rotating speed, centrifugal-block overcomes Self-resetting element elastic power to make its free end form outer formula to open under the action of the centrifugal force, centrifugation
Block is rotated by torque transferring structure band moving cam mandrel, pressure release pin reset retraction under the effect of runback bit unit, and its head is not
Contacted with exhaust rocker arm, so as to form the normal operating conditions of engine.Due to pressure release pin be by cam mandrel control stretch out and
Can Self-resetting retraction radial expansion structure, and pressure release pins position is in exhaust cam side, therefore, the pressure release formed on camshaft
Pin-and-hole will not destroy exhaust cam working face, eliminate the brought cam of fluting in exhaust cam basic circle section in the prior art
Basic circle is destroyed, the fault of construction of the inordinate wear of rocking arm working face and stress concentration；Meanwhile, cam mandrel is located at camshaft axle center
On, pressure release pin quality is small, and the two is small to camshaft dynamic balancing influence amount, will not cause inordinate wear to camshaft bearing, starts
Machine noise is small, long service life.Wherein, the first flexible member for pressure release pin Self-resetting includes compression spring or by elastomer
The resilient sleeve that material is made, such as rubber sleeve；The second flexible member for centrifugal-block is driven with timing including being connected to centrifugal-block
Extension spring, compression spring, torsion spring between sprocket wheel and when centrifugal-block is provided with multiple, its stretching for connecting each other
Spring.
Preferably, the centrifugal-block is circumferentially uniform is provided with two；Second flexible member for be connected to two from
The extension spring of the free end end of heart block；Two centrifugal-blocks are equipped with torque transfer arrangement with cam mandrel.Its simple structure,
Process, be convenient to mount and dismount.Certainly, it is in 3 or 4 centrifugal-blocks that the size according to engine also can be set, between any two centrifugal-block
Connect the extension spring.
Preferably, the pressure release pin and pressure release pin-and-hole are in step-like, and pressure release pin head part can be by the small bore end of pressure release pin-and-hole
Stretch out；First flexible member is the compression bullet being connected between the interior step of pressure release pin-and-hole and the shaft shoulder step of pressure release pin
Spring.Its simple structure, processes, is convenient to mount and dismount.
Preferably, the torque transfer arrangement is by being located at the fork slot of centrifugal-block and being fixedly connected on dialling on cam mandrel
Dynamic pin bank is into stirring pin and form sliding connection with fork slot.Its simple structure, easy to process, low cost of manufacture.Certainly,
Also can will stir pin to be located on centrifugal-block, corresponding fork slot is located on cam mandrel, and its structure has diversity.
It is further preferred that be located on the cam mandrel on the outside of driven sprocket being formed in part with end face disk；Described group
Dynamic pin is arranged on the outer face of end face disk in eccentric manner.Its simple structure, easy to process, low cost of manufacture.Also will can dial
Dynamic pin is located on the wall of end face disk side, and its structure has diversity.
Preferably, the collar flange for being enclosed in centrifugal-block periphery is formed with the outer face of the timing driven sprocket, and
Zigzag block is fixedly connected with timing driven sprocket, zigzag block has part of the gear shield on the outside of centrifugal-block.To be formed
Limitation to amplitude outside centrifugal-block, and can effectively prevent centrifugal-block from being come off when being surprisingly broken, it is its good dynamic balance, safe.
The beneficial effects of the invention are as follows cam base circle is not destroyed, the abrasion without exception of exhaust rocker arm working face, and distribution is convex
Concentration hidden danger that wheel shaft is unstressed, and engine noise is small, long lifespan, security are good.
Brief description of the drawings
Fig. 1 is structural representation axonometric drawing of the invention, and the free end of centrifugal-block 6 is in the closure state tightened up, pressure release in figure
The head of pin 4 is in and stretches out state.
Fig. 2 is that the present invention is in shown in Fig. 1 during state, from the orthographic projection view that timing driven sprocket outside is obtained.
Fig. 3 is structural representation axonometric drawing of the invention, and the free end of centrifugal-block 6 is in the open mode of outer, pressure release in figure
The head of pin 4 is in retracted state.
Fig. 4 is that the present invention is in shown in Fig. 3 during state, from the orthographic projection view that timing driven sprocket outside is obtained.
Fig. 5 is structural representation front view of the invention.
Fig. 6 is part-structure schematic front view of the invention.
Fig. 7 is the A-A sectional views in Fig. 5 of the present invention.
Fig. 8 is the part-structure schematic diagram of centrifugal-block 6 in the present invention.
Fig. 9 is the structural representation axonometric drawing of zigzag block 10 in the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings, but does not therefore limit the present invention to described implementation
Among example scope.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, a kind of motorcycle engine pressure-reduction starting device,
Including camshaft 1, timing driven sprocket 2, camshaft 1 is fixedly connected with timing driven sprocket 2 by mounting flange 3, described
The side of exhaust cam 11 on camshaft 1 is provided with the pressure release pin-and-hole for traversing, and it is convex that pressure release pin-and-hole is located at exhaust in the phase of camshaft 1
Take turns in 11 basic circles section phase range, and near the lift of exhaust cam 11 section, be sliding combined with pressure release pin-and-hole for jack-up exhaust
The pressure release pin 4 of door rocking arm, pressure release pin 4 and pressure release pin-and-hole are in step-like, and the head of pressure release pin 4 can be stretched by the small bore end of pressure release pin-and-hole
Go out；It is connected with for the Self-resetting of pressure release pin 4, and by compressing between the interior step of pressure release pin-and-hole and the shaft shoulder 4a steps of pressure release pin 4
The first flexible member 8 that spring is constituted, pressure release pin 4 is connected with cam mandrel 5 by the other end, and the cam mandrel 5 is rotatable
Coordinate in the mesopore that camshaft 1 is provided with；The lateral surface of the driven sprocket 2 is provided with two circumference uniform distributions and rotatable centrifugation
Block 6, the free end end of two centrifugal-block 6 is connected with the second elasticity constituted for the Self-resetting of centrifugal-block 6 and by extension spring
Element 7, the part that two centrifugal-blocks 6 stretch out the outside of timing driven sprocket 2 with cam mandrel 5 is provided with torque transfer arrangement, should
Torque transfer arrangement is used for the swing band moving cam of centrifugal-block 6 mandrel 5 and swings；It is also formed with the outer face of timing driven sprocket 2
The collar flange 2a of the periphery of centrifugal-block 6 is enclosed in, and zigzag block 10 is fixedly connected with timing driven sprocket 2, zigzag gear
Block 10 has part of the gear shield in the outside of centrifugal-block 6.
Wherein, the outside of driven sprocket 2 is located on cam mandrel 5 is formed in part with end face disk 51；The moment of torsion transmission knot
Structure is made up of the fork slot 6a for being located at centrifugal-block 6 and the pin 9 of stirring being fixedly connected on cam mandrel 5, stirs pin 9 in bias side
Formula is arranged on the outer face of end face disk 51, is stirred pin 9 and is formed sliding connection with fork slot 6a.
Torque transfer arrangement in the present embodiment is substituted by the way of being also located on the side wall of end face disk 51 using pin 9 is stirred；
Also can be located on centrifugal-block 6 using pin 9 is stirred, the mode that fork slot 6a is located on the end face disk of cam mandrel 5 is substituted.
The first flexible member 8 in the present embodiment can also be replaced using the resilient sleeve being made up of elastomeric material, such as rubber
Set etc.；Certainly, the second flexible member 7 also can be using the stretching being connected between centrifugal-block 6 and timing driven sprocket 2 in the present invention
Spring, compression spring, torsion spring etc. are replaced.
Centrifugal-block 6 in the present embodiment may also be configured to 3 or 4, and described is connected and composed between any two centrifugal-block
The extension spring of two flexible members 7.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Need creative work just can make many modifications and variations with design of the invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (5)
1. a kind of motorcycle engine pressure-reduction starting device, including camshaft（1）, timing driven sprocket（2）, camshaft（1）With
Timing driven sprocket（2）By mounting flange（3）It is fixedly connected, camshaft（1）On exhaust cam（11）Side is provided with horizontal stroke
The pressure release pin-and-hole for passing through, pressure release pin-and-hole is in camshaft（1）Phase be located at exhaust cam（11）In basic circle section phase range, and it is close to
Exhaust cam（11）Lift section, is sliding combined with the pressure release pin for jack-up exhaust valve rocker in pressure release pin-and-hole（4）, pressure release pin
（4）On be connected with for pressure release pin（4）First flexible member of Self-resetting（8）, pressure release pin（4）Cam is connected with by the other end
Mandrel（5）, the cam mandrel（5）Rotatably coordinate in camshaft（1）In the mesopore being provided with；The driven sprocket（2）Outside
Face is provided with rotatable centrifugal-block（6）, the centrifugal-block（6）On be connected with for centrifugal-block（6）Second elasticity unit of Self-resetting
Part（7）, centrifugal-block（6）With cam mandrel（5）Stretch out timing driven sprocket（2）The part in outside is provided with torque transfer arrangement, should
Torque transfer arrangement is used for centrifugal-block（6）Swing band moving cam mandrel（5）Swing；Characterized in that, the timing driven sprocket
（2）Outer face on be formed with and be enclosed in centrifugal-block（6）The collar flange of periphery（2a）, and timing driven sprocket（2）Upper fixation
It is connected with zigzag block（10）, zigzag block（10）With gear shield in centrifugal-block（6）The part in outside.
2. motorcycle engine pressure-reduction starting device according to claim 1, it is characterised in that the centrifugal-block（6）It is in
Circumference uniform distribution is provided with two；Second flexible member（7）To be connected to two centrifugal-blocks（6）Free end end stretching
Spring；Two centrifugal-blocks（6）With cam mandrel（5）It is equipped with torque transfer arrangement.
3. motorcycle engine pressure-reduction starting device according to claim 1, it is characterised in that the pressure release pin（4）With
Pressure release pin-and-hole is in step-like, pressure release pin（4）Head can be stretched out by the small bore end of pressure release pin-and-hole；First flexible member（8）
To be connected to the interior step and pressure release pin of pressure release pin-and-hole（4）The shaft shoulder（4a）Compression spring between step.
4. the motorcycle engine pressure-reduction starting device according to any one in claims 1 to 3, it is characterised in that institute
Torque transfer arrangement is stated by being located at centrifugal-block（6）Fork slot（6a）Be fixedly connected on cam mandrel（5）On stir pin（9）
Composition, stirs pin（9）With fork slot（6a）Form sliding connection.
5. motorcycle engine pressure-reduction starting device according to claim 4, it is characterised in that the cam mandrel（5）
It is upper to be located at driven sprocket（2）Outside is formed in part with end face disk（51）；It is described to stir pin（9）End face is arranged in eccentric manner
Disk（51）Outer face on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410820250.XA CN104533565B (en) | 2014-12-25 | 2014-12-25 | A kind of motorcycle engine pressure-reduction starting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410820250.XA CN104533565B (en) | 2014-12-25 | 2014-12-25 | A kind of motorcycle engine pressure-reduction starting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104533565A CN104533565A (en) | 2015-04-22 |
| CN104533565B true CN104533565B (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410820250.XA Active CN104533565B (en) | 2014-12-25 | 2014-12-25 | A kind of motorcycle engine pressure-reduction starting device |
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| CN (1) | CN104533565B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569761B (en) * | 2016-02-29 | 2017-12-08 | 重庆高金实业有限公司 | Engine start pressure-reducing valve mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201144719Y (en) * | 2007-12-30 | 2008-11-05 | 重庆宗申发动机制造有限公司 | Automatic decompressor mechanism for engine start |
| CN202108553U (en) * | 2011-05-12 | 2012-01-11 | 江苏林海动力机械集团公司 | Engine decompression device |
| CN202926419U (en) * | 2012-11-06 | 2013-05-08 | 重庆金桥机器制造有限责任公司 | Starting pressure reducing device for diesel engine or gasoline engine |
| CN204386690U (en) * | 2014-12-25 | 2015-06-10 | 重庆银钢科技（集团）有限公司 | Motorcycle engine pressure-reduction starting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4531026B2 (en) * | 2006-09-26 | 2010-08-25 | 本田技研工業株式会社 | Valve operating device for internal combustion engine |
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2014
- 2014-12-25 CN CN201410820250.XA patent/CN104533565B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201144719Y (en) * | 2007-12-30 | 2008-11-05 | 重庆宗申发动机制造有限公司 | Automatic decompressor mechanism for engine start |
| CN202108553U (en) * | 2011-05-12 | 2012-01-11 | 江苏林海动力机械集团公司 | Engine decompression device |
| CN202926419U (en) * | 2012-11-06 | 2013-05-08 | 重庆金桥机器制造有限责任公司 | Starting pressure reducing device for diesel engine or gasoline engine |
| CN204386690U (en) * | 2014-12-25 | 2015-06-10 | 重庆银钢科技（集团）有限公司 | Motorcycle engine pressure-reduction starting device |
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| Publication number | Publication date |
|---|---|
| CN104533565A (en) | 2015-04-22 |
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