CN202673387U - Air inlet cam pressure reducing device for motor of motorcycle - Google Patents
Air inlet cam pressure reducing device for motor of motorcycle Download PDFInfo
- Publication number
- CN202673387U CN202673387U CN 201220253035 CN201220253035U CN202673387U CN 202673387 U CN202673387 U CN 202673387U CN 201220253035 CN201220253035 CN 201220253035 CN 201220253035 U CN201220253035 U CN 201220253035U CN 202673387 U CN202673387 U CN 202673387U
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- China
- Prior art keywords
- ball valve
- eccentric hammer
- cam
- camshaft
- intake cam
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Abstract
The utility model relates to an air inlet cam pressure reducing device for a motor of a motorcycle, which can solve the problem that gas pressure in an air cylinder is too high. An air inlet cam and an exhaust cam are arranged on a cam shaft, wherein a ball valve body, a ball valve, a bearing, a flange plate, a timing gear, a limited post, a return torsion spring and an eccentric weight are sequentially assembled on one side of the air inlet cam; the timing gear is locked on the flange plate tightly by bolts; another bearing is assembled on one side of the exhaust cam; and the rotating of the eccentric weight enables the ball valve to be higher or lower than a base round surface of the air inlet cam. The air inlet cam pressure reducing device enables an air inlet door to be in a timely opening state, and the compressed gas in the air cylinder is discharged through the air inlet door, so as to reduce the gas pressure in the air cylinder.
Description
Technical field
The utility model relates to a kind of pressure reducer for motorcycle engine, relates in particular to a kind of intake cam decompressor of motorcycle engine.
Background technique
When motorcycle engine starts, piston compresses the gas that sucks in the cylinder, normal operation mechanism according to distribution device, at this moment inlet and exhaust valve all is in closed condition, near approaching compression terminal point, the gas pressure in the cylinder is very high, and this can cause starting very difficult, for electric ato unit, load moment of its starting electrical machinery reaches the highest; For the motor that hand or pin start, then can feel the operation effort, if when the power on control handle or the pin starting bar of being applied to can not overcome above-mentioned gas pressure, control handle or pin starting bar will have a rebound, and hurt human body or damage machine.
Summary of the invention
In order to overcome the deficiencies in the prior art, the purpose of this utility model provides a kind of motorcycle engine intake cam decompressor, to solve the too high problem of gas pressure in the existing cylinder.
Technological scheme
The purpose of this utility model is achieved in that a kind of motorcycle engine intake cam decompressor, comprises limited post, return torsion spring, timing driven sprocket, flange plate, bearing, ball valve body, ball valve, camshaft, eccentric hammer, screw.Camshaft is provided with intake cam and exhaust cam, and intake cam one side is equipped with bearing, flange plate, timing gear successively, with screw timing gear is locked on the flange plate, and exhaust cam one side is equipped with bearing.Its special way is: eccentric hammer comprises eccentric hammer axle and eccentric hammer body, and the eccentric hammer axle links to each other with eccentric hammer body, and camshaft is provided with axial eccentric hammer axis hole, and the basic circle of the intake cam of camshaft is provided with ball valve orifice and communicates with the eccentric hammer axis hole; The eccentric hammer axle is assemblied in the eccentric hammer axis hole of camshaft; Ball valve is contained in the ball valve orifice, and ball valve is dropped on the eccentric hammer axle; Camshaft is provided with radially limited post hole, and limited post is contained in the limited post hole; The return torsion spring is assemblied on the eccentric hammer axle near eccentric hammer body, and return torsion spring one end tangles eccentric hammer body, and the other end tangles limited post; The rotation of eccentric hammer makes ball valve be higher or lower than intake cam basic circle face.
A kind of motorcycle engine intake cam decompressor, its special way is: deviates from for preventing ball valve, assembling one ball valve body in ball valve orifice, ball valve body is tapered collar, ball valve places in the tapered collar.
A kind of motorcycle engine intake cam decompressor, its special way is: the contact jaw of ball valve and eccentric hammer axle is provided with groove, ball valve can along with the rotation of eccentric hammer axle freely fall into or withdraw from groove.
When motorcycle engine does not start, eccentric hammer is return under the elastic force effect of return torsion spring, at this moment ball valve is by eccentric hammer axle jack-up, the basic circle face that ball valve exceeds intake cam contacts with rocking arm, the intake valve that contacts with rocking arm is in open mode, gas in the firing chamber is emitted by intake valve, the firing chamber decompression; After motorcycle engine started, camshaft reached certain rotating speed, and the centrifugal force of eccentric hammer is during greater than the elastic force of return torsion spring, eccentric hammer deflection several angle under the effect of centrifugal force, and ball valve falls in the groove of eccentric hammer, and the decompression of ball valve disappears; After motorcycle engine is flame-out, when camshaft is reduced to certain rotating speed, the suffered centrifugal force of eccentric hammer is less than the elastic force that returns the torsion spring of fullying recover from an illness, eccentric hammer is return under the elastic force effect of return torsion spring, ball valve is by eccentric hammer axle jack-up, and the basic circle face that ball valve exceeds intake cam contacts with rocking arm, and the intake valve that contacts with rocking arm is in open mode, gas in the firing chamber is emitted by intake valve, the firing chamber decompression.
Beneficial effect
Owing to having adopted technological scheme described in the utility model: make intake valve be in good time opening state by decompressor, the pressurized gas in the cylinder is discharged by intake valve, thereby reduces the pressure of gas in the cylinder.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the three-dimensional exploded view of the described motorcycle engine intake cam of the utility model embodiment decompressor.
Fig. 2 is the structural representation of the described motorcycle engine intake cam of the utility model embodiment decompressor.
Embodiment:
Be further described below in conjunction with the concrete structure of accompanying drawing to the utility model embodiment.
With reference to Fig. 1, described motorcycle engine intake cam decompressor is comprised of limited post 1, return torsion spring 2, timing driven sprocket 3, flange plate 4, bearing 5, ball valve body 6, ball valve 7, camshaft 8, eccentric hammer 9, screw 10.
With reference to Fig. 2, camshaft 8 is provided with intake cam 81 and exhaust cam 82, and intake cam 81 1 sides are equipped with bearing 5, flange plate 4, timing gear 3 successively, with screw 10 timing gear 3 is locked on the flange plate 4, and exhaust cam 82 1 sides are equipped with bearing 5.Eccentric hammer 9 comprises eccentric hammer axle 91 and eccentric hammer body 92, eccentric hammer axle 91 links to each other with eccentric hammer body 92, camshaft 8 is provided with axial eccentric hammer axis hole 83, the basic circle of the intake cam 81 of camshaft 8 is provided with ball valve orifice 84 and communicates with eccentric hammer axis hole 83, eccentric hammer axle 91 is assemblied in the eccentric hammer axis hole 83 of camshaft 8, ball valve 7 is contained in the ball valve orifice 84, and ball valve 7 is dropped on the eccentric hammer axle 91; Camshaft 8 is provided with radially limited post hole 85, and limited post 1 is contained in the limited post hole 85; Return torsion spring 2 is assemblied on the eccentric hammer axle 91 near eccentric hammer body 92.For preventing that ball valve 7 from deviating from, 84 assemblings, one ball valve body 6 in ball valve orifice, ball valve body 6 is tapered collar, ball valve 7 places in the tapered collar.Ball valve 7 is provided with groove 93 with the contact jaw of eccentric hammer axle 91, ball valve 7 can along with the rotation of eccentric hammer axle 91 freely fall into or withdraw from groove 93.
The above only is preferred embodiment of the present utility model, is not structure of the present utility model is done any pro forma restriction.All foundations technical spirit of the present utility model all still belongs in the scope of the technical solution of the utility model any simple modification and equivalent variations and modification that above embodiment does.
Claims (3)
1. a motorcycle engine intake cam decompressor comprises limited post, return torsion spring, timing driven sprocket, flange plate, bearing, ball valve body, ball valve, camshaft, eccentric hammer, screw; Camshaft is provided with intake cam and exhaust cam, and intake cam one side is equipped with bearing, flange plate, timing gear successively, with screw timing gear is locked on the flange plate, and exhaust cam one side is equipped with bearing; It is characterized in that: eccentric hammer comprises eccentric hammer axle and eccentric hammer body, and the eccentric hammer axle links to each other with eccentric hammer body, and camshaft is provided with axial eccentric hammer axis hole, and the basic circle of the intake cam of camshaft is provided with ball valve orifice and communicates with the eccentric hammer axis hole; The eccentric hammer axle is assemblied in the eccentric hammer axis hole of camshaft; Ball valve is contained in the ball valve orifice, and ball valve is dropped on the eccentric hammer axle; Camshaft is provided with radially limited post hole, and limited post is contained in the limited post hole; The return torsion spring is assemblied on the eccentric hammer axle near eccentric hammer body, and return torsion spring one end tangles eccentric hammer body, and the other end tangles limited post; The rotation of eccentric hammer makes ball valve be higher or lower than intake cam basic circle face.
2. described motorcycle engine intake cam decompressor according to claim 1 is characterized in that: deviates from for preventing ball valve, and assembling one ball valve body in ball valve orifice, ball valve body is tapered collar, ball valve places in the tapered collar.
3. described motorcycle engine intake cam decompressor according to claim 1, it is characterized in that: the contact jaw of ball valve and eccentric hammer axle is provided with groove, ball valve can along with the rotation of eccentric hammer axle freely fall into or withdraw from groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220253035 CN202673387U (en) | 2012-05-31 | 2012-05-31 | Air inlet cam pressure reducing device for motor of motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220253035 CN202673387U (en) | 2012-05-31 | 2012-05-31 | Air inlet cam pressure reducing device for motor of motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202673387U true CN202673387U (en) | 2013-01-16 |
Family
ID=47494297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220253035 Expired - Fee Related CN202673387U (en) | 2012-05-31 | 2012-05-31 | Air inlet cam pressure reducing device for motor of motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202673387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578572A (en) * | 2019-09-04 | 2019-12-17 | 天津内燃机研究所（天津摩托车技术中心） | Camshaft starting pressure reducing mechanism |
-
2012
- 2012-05-31 CN CN 201220253035 patent/CN202673387U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578572A (en) * | 2019-09-04 | 2019-12-17 | 天津内燃机研究所（天津摩托车技术中心） | Camshaft starting pressure reducing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20180531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |