CN202108554U - Engine decompression structure assembly and motorcycle comprising same - Google Patents
Engine decompression structure assembly and motorcycle comprising same Download PDFInfo
- Publication number
- CN202108554U CN202108554U CN2011201674338U CN201120167433U CN202108554U CN 202108554 U CN202108554 U CN 202108554U CN 2011201674338 U CN2011201674338 U CN 2011201674338U CN 201120167433 U CN201120167433 U CN 201120167433U CN 202108554 U CN202108554 U CN 202108554U
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- reducing valve
- valve body
- camshaft
- structure assembly
- pressure reduction
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Abstract
The utility model relates to an engine decompression structure assembly and a motorcycle comprising the same. The engine decompression structure assembly comprises a cam shaft and a reducing valve component, wherein the cam shaft is provided with an intake cam and an exhaust cam; the reducing valve component comprises a reducing valve body, a centrifugation block and a fastening bolt; the reducing valve body and the cam shaft are coaxially and fixedly matched in the circumference direction; and the fastening bolt is screwed on the cam shaft in threaded fit and fastens the reducing valve body on the cam shaft along the axial direction. The engine decompression structure assembly limits the axial freedom degree of the reducing valve body, plays a certain role of limiting the freedom degree in the circumference direction, and ensures that the reducing valve can be installed on the cam shaft more firmly by being combined with the limiting structure of the reducing valve body in the circumference direction, so that the reducing valve body can bear, transmit and offset the rotation inertia and impact load generated by the high-speed rotation of an engine, the phenomenon of fatigue breakage can be avoided, the service life of the engine can be ensured, and the using cost can be saved. The engine decompression structure assembly can be used for the engine and the motorcycle and can reduce the maintenance frequency greatly so as to reduce the maintenance cost.
Description
Technical field
The utility model relates to a kind of engine accessory parts that are used for, particularly a kind of camshaft parts and motorcycle thereof that is used for the switch motor valve.
Background technique
Motor pressure reduction structure assembly is the part of distribution device outbalance, comprises camshaft and is arranged at intake and exhaust cam on the camshaft, correct time parts and reduction valve assembly.The reduction valve assembly mainly is to be used for when starting, reducing the engine cylinder internal pressure, reduces and starts external force, avoids occurring the too high or manually-operable handle of the load of starting electrical machinery and phenomenon occurs rebounding strongly.
The reduction valve assembly of widespread usage generally comprises reducing valve body and centrifugal; Reducing valve body is coaxial and in the circumferencial direction secure fit with camshaft; Centrifugal is arranged at reducing valve body with the mode that can move along the camshaft radial plane; When motor does not start, make exhaust valve have suitable aperture, thereby when starting, reduce in-cylinder pressure with the centrifugal fast decompression valve rod that is connected; After starting, the camshaft high speed rotating, centrifugal produces centrifugal motion, drives the decompression valve rod and rotates, and decompression valve rod respective face sinks to camshaft, guarantees the sealing of exhaust valve.Thereby the low pressure when realizing starting.
In the existing technology, for reduction valve and correct time parts be respectively in the camshaft assembly structure at camshaft two ends, reducing valve body generally adopts the mode of jump ring axial limiting to be arranged at camshaft.This structure has produced bigger rotating inertia force and impulsive load under high engine speeds rotation or rotating speed change over condition, thereby causes the decompression body of laws fatigue fracture to occur, increases frequency of maintenance.
Therefore, need improve, make reducing valve body can bear rotating inertia force and impulsive load that the high engine speeds rotation produces, the fatigue fracture phenomenon not occur, guarantee its working life, practice thrift user cost existing motor pressure reduction structure assembly.
The model utility content
In view of this; The purpose of the utility model provides a kind of motor pressure reduction structure assembly and motorcycle thereof; Camshaft assembly makes reducing valve body can bear rotating inertia force and impulsive load that the high engine speeds rotation produces; The fatigue fracture phenomenon do not occur, guarantee its working life, practice thrift user cost.
The motor pressure reduction structure assembly of the utility model; Comprise camshaft and reduction valve assembly; Said camshaft is provided with intake cam and exhaust cam; Said reduction valve assembly comprises reducing valve body, centrifugal and clamping bolt, and said reducing valve body and camshaft are in the concentric secure fit of circumferencial direction, and said clamping bolt screw-thread fit is threaded onto camshaft and reducing valve body is anchored on camshaft vertically.
Further, said camshaft is provided with the shaft shoulder that reducing valve body is spacing, and said reducing valve body is against the shaft shoulder by tightened bolt presses after center hole being set and being coated at camshaft through center hole; The structure that adopts the shaft shoulder to push against makes the utility model mounting structure compact, and integrity is strong, and good positioning effect, avoids taking place alignment error as far as possible.
Further; Said centrifugal is semicircular structure; One end is articulated in reducing valve body with the mode that can rotate along the camshaft radial plane; The other end drives through a connecting pin and is connected in the decompression valve rod that passes reducing valve body vertically; Said decompression valve rod is sunken in the valve rod groove that the camshaft surface is provided with vertically and extends to the camming surface that exhaust cam is used to make exhaust valve closing vertically, and said decompression valve rod radially protrudes in this camming surface along camshaft, and said decompression valve rod is provided with the depression that is lower than or flushes in this camming surface when it goes to the phase place corresponding with this camming surface; Adopt hinging structure centrifugal, rubbing surface is little, motion flexibly, safety action sensitive reliable.
Further, said reducing valve body center hole edge outwards is provided with axial ledge vertically, and said hold-down bolt presses the axial ledge end face in reducing valve body through compressing backing plate; Said centrifugal compressing around the mode that its hinging shaft freely rotates between backing plate and the reducing valve body; Adopt flanged structure, can guarantee that not only centrifugal has comparatively abundant exercise space, can also guarantee the integrity and the compactedness of reducing valve body, further improve the load ability of reducing valve body, strengthen the ability that the body antifatigue is impacted, prolong its working life; Adopt the compress gasket structure, can increase the area of contact that compresses of flange, guarantee the reliability that it is fastening, also have of the effect of restriction centrifugal block axis simultaneously, guarantee the operational reliability of pressure relief assembly to displacement.
Further, said centrifugal is provided with and makes it be back to the return spring of position of rest; Utilize the spring return, sensitive reliable.
Further, fixedly install the limiting stopper that is useful on centrifugal return position of restriction on the said reducing valve body; Guarantee that valve body is not impacted by centrifugal return, further improve the working life of reducing valve body.
Further, said clamping bolt is one and cooperates with the camshaft coaxial threaded and to screw in the camshaft end face, presses the axial ledge end face in reducing valve body with compressing backing plate; Simple and compact for structure, easy installation and removal.
Further, the axial ledge internal surface of said reducing valve body radially outwards is provided with radially cotter way, is provided with in the said radially cotter way and radially inserts the locating stud that camshaft is used for along the circumferential direction locating; Adopt locating stud to carry out being in transmission connection of circumferencial direction; Simplify linkage structure; Make the manufacture difficulty of reducing valve body and camshaft reduce, reduce the installation and removal difficulty simultaneously, and circumferencial direction location is preferably arranged; The axially locating of matching and fixing bolt reaches the purpose that limits the reducing valve body degrees of freedom.
The invention also discloses a kind of motorcycle of application engine pressure reduction structure assembly, said motor pressure reduction structure assembly is installed on motor, and this motor is used for motorcycle.
The beneficial effect of the utility model is: the motor pressure reduction structure assembly and the motorcycle thereof of the utility model, and in the reduction valve assembly of motor pressure reduction structure assembly, reducing valve body is fixed reducing valve body through bolt; Limited the axial freedom of reducing valve body; And to the degrees of freedom of circumferencial direction restriction also plays a role, ins conjunction with the circumferencial direction limit structure of reducing valve body, comparatively firm being installed on the camshaft of assurance reducing valve body; Make reducing valve body bear and to transmit and offset rotating inertia force and the impulsive load that the high engine speeds rotation produces; The fatigue fracture phenomenon do not occur, guarantee its working life, practice thrift user cost; The motor pressure reduction structure assembly of the utility model is used for motor and is used for motorcycle, reduces frequency of maintenance greatly, thereby reduces maintenance and maintenance cost.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is the structural representation of the utility model;
Fig. 2 be this Fig. 1 along A-A to sectional view.
Embodiment
Fig. 1 is the structural representation of the utility model; Fig. 2 be this Fig. 1 along A-A to sectional view; As shown in the figure: the motor pressure reduction structure assembly of present embodiment; Comprise camshaft 1 and reduction valve assembly, said camshaft 1 is provided with intake cam 1a and exhaust cam 1b, and said reduction valve assembly comprises reducing valve body 2, centrifugal 6 and clamping bolt 4; Said reducing valve body 2 and camshaft 1 are in the concentric secure fit of circumferencial direction, and said clamping bolt 4 screw-thread fit are threaded onto camshaft 1 and reducing valve body 2 is anchored on camshaft 1 vertically.
In the present embodiment, said camshaft 1 is provided with the shaft shoulder that reducing valve body is spacing, and said reducing valve body 2 is provided with center hole and is coated at camshaft 1 back being compressed by clamping bolt 4 through center hole and is against the shaft shoulder; The structure that adopts the shaft shoulder to push against makes the utility model mounting structure compact, and integrity is strong, and good positioning effect, avoids taking place alignment error as far as possible.
In the present embodiment; Said centrifugal 6 is semicircular structure; One end is articulated in reducing valve body 2 with the mode that can rotate along camshaft 1 radial plane, and the other end drives through a connecting pin 9 and is connected in the decompression valve rod 10 that passes reducing valve body 2 vertically, and is as shown in the figure; Connecting pin 9 radially is connected in decompression valve rod 10 along decompression valve rods 10, conveniently drives it around self rotational; Said decompression valve rod 10 is sunken in the valve rod groove 1c that camshaft 1 surface is provided with vertically and extends to the camming surface that exhaust cam 1b is used to make exhaust valve closing vertically; Said decompression valve rod 10 radially protrudes in this camming surface along camshaft 1, and said decompression valve rod 10 is provided with the depression that is lower than or flushes in this camming surface when it goes to the phase place corresponding with this camming surface; When camshaft runs up under the driving of motor; Driving decompression valve rod 10 through connecting pin 9 for centrifugal 6 rotates; Decompression valve rod 10 makes its depression go to the camming surface that makes exhaust valve closing under centrifugal 6 driving, because depression is lower than or concordant this camming surface, does not then disturb closing of exhaust valve; Thereby the keying to exhaust valve does not cause interference, makes motor keep running well; Adopt hinging structure centrifugal, rubbing surface is little, motion flexibly, safety action sensitive reliable.
In the present embodiment, said reducing valve body 2 center hole edges outwards are provided with axial ledge 1d vertically, outwards are that extend in the outside, end of pointing to camshaft; Said hold-down bolt 4 presses the end face in the axial ledge 1d of reducing valve body 2 through compressing backing plate 3; Said centrifugal 6 compressing around the mode that its hinging shaft freely rotates between backing plate 3 and the reducing valve body 2; Adopt flanged structure, can guarantee that not only centrifugal has comparatively abundant exercise space, can also guarantee the integrity and the compactedness of reducing valve body, further improve the load ability of reducing valve body, strengthen the ability that the body antifatigue is impacted, prolong its working life; Adopt compress gasket 3 structures, can increase the area of contact that compresses of flange, guarantee the reliability that it is fastening, also have of the effect of restriction centrifugal block axis simultaneously, guarantee the operational reliability of pressure relief assembly to displacement
In the present embodiment, said centrifugal 6 is provided with and makes its return spring that is back to position of rest 5; As shown in the figure, return spring is the column spring, and an end connects centrifugal 6, and the other end connects reducing valve body 2, and has pretightening force, utilizes the spring return, and is sensitive reliable.
In the present embodiment, fixedly install the limiting stopper 8 that is useful on centrifugal 6 return position of restriction on the said reducing valve body 2; Guarantee that valve body is not impacted by centrifugal return, further improve the working life of reducing valve body.
In the present embodiment, said clamping bolt 4 is one and cooperates with camshaft 1 coaxial threaded and to screw in camshaft 1 end face, presses the axial ledge end face in reducing valve body 2 with compressing backing plate 3.
In the present embodiment, the axial ledge 1d internal surface of said reducing valve body 2 radially outwards is provided with radially cotter way, is provided with in the said radially cotter way and radially inserts the locating stud 7 that camshaft is used for along the circumferential direction locating; Adopt locating stud 7 to carry out being in transmission connection of circumferencial direction; Simplify linkage structure; Make the manufacture difficulty of reducing valve body and camshaft reduce, reduce the installation and removal difficulty simultaneously, and circumferencial direction location is preferably arranged; The axially locating of matching and fixing bolt reaches the purpose that limits the reducing valve body degrees of freedom.
Present embodiment also discloses a kind of motorcycle of application engine pressure reduction structure assembly, and said motor pressure reduction structure assembly is installed on motor, and this motor is used for motorcycle.
Explanation is at last; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment to the technological scheme of the utility model or/and be equal to replacement; And not breaking away from the aim and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (9)
1. motor pressure reduction structure assembly; Comprise camshaft and reduction valve assembly; Said camshaft is provided with intake cam and exhaust cam; It is characterized in that: said reduction valve assembly comprises reducing valve body, centrifugal and clamping bolt, and said reducing valve body and camshaft are in the concentric secure fit of circumferencial direction, and said clamping bolt screw-thread fit is threaded onto camshaft and reducing valve body is anchored on camshaft vertically.
2. motor pressure reduction structure assembly according to claim 1 is characterized in that: said camshaft is provided with the shaft shoulder that reducing valve body is spacing, and said reducing valve body is against the shaft shoulder by tightened bolt presses after center hole being set and being coated at camshaft through center hole.
3. motor pressure reduction structure assembly according to claim 2; It is characterized in that: said centrifugal is semicircular structure; One end is articulated in reducing valve body with the mode that can rotate along the camshaft radial plane; The other end is connected in the decompression valve rod that passes reducing valve body vertically through a connecting pin; Said decompression valve rod is sunken in the valve rod groove that the camshaft surface is provided with vertically and extends to the camming surface that exhaust cam is used to make exhaust valve closing vertically, and said decompression valve rod radially protrudes in this camming surface along camshaft, and said decompression valve rod is provided with the depression that is lower than or flushes in this camming surface when it goes to the phase place corresponding with this camming surface.
4. motor pressure reduction structure assembly according to claim 3 is characterized in that: said reducing valve body center hole edge outwards is provided with axial ledge vertically, and said hold-down bolt presses the axial ledge end face in reducing valve body through compressing backing plate; Said centrifugal compressing between backing plate and the reducing valve body around the mode that its hinging shaft freely rotates.
5. motor pressure reduction structure assembly according to claim 4 is characterized in that: said centrifugal is provided with and makes it be back to the return spring of position of rest.
6. motor pressure reduction structure assembly according to claim 5 is characterized in that: fixedly install the limiting stopper that is useful on centrifugal return position of restriction on the said reducing valve body.
7. motor pressure reduction structure assembly according to claim 6 is characterized in that: said clamping bolt is one and cooperates with the camshaft coaxial threaded and to screw in the camshaft end face, presses the axial ledge end face in reducing valve body with compressing backing plate.
8. motor pressure reduction structure assembly according to claim 7; It is characterized in that: the axial ledge internal surface of said reducing valve body radially outwards is provided with radially cotter way, is provided with in the said radially cotter way and radially inserts the locating stud that camshaft is used for along the circumferential direction locating.
9. an application rights requires the motorcycle of the described motor pressure reduction structure of 1 to 8 arbitrary claim assembly, and it is characterized in that: said motor pressure reduction structure assembly is installed on motor, and this motor is used for motorcycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201674338U CN202108554U (en) | 2011-05-24 | 2011-05-24 | Engine decompression structure assembly and motorcycle comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201674338U CN202108554U (en) | 2011-05-24 | 2011-05-24 | Engine decompression structure assembly and motorcycle comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202108554U true CN202108554U (en) | 2012-01-11 |
Family
ID=45433991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201674338U Expired - Fee Related CN202108554U (en) | 2011-05-24 | 2011-05-24 | Engine decompression structure assembly and motorcycle comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202108554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939448A (en) * | 2015-12-15 | 2017-07-11 | 里特机械公司 | Arrangement of the combing cylinder in combing machine |
| CN113914967A (en) * | 2021-11-03 | 2022-01-11 | 江门市大长江集团有限公司 | Limiting part for pressure reducing mechanism, pressure reducing mechanism and engine |
-
2011
- 2011-05-24 CN CN2011201674338U patent/CN202108554U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106939448A (en) * | 2015-12-15 | 2017-07-11 | 里特机械公司 | Arrangement of the combing cylinder in combing machine |
| CN113914967A (en) * | 2021-11-03 | 2022-01-11 | 江门市大长江集团有限公司 | Limiting part for pressure reducing mechanism, pressure reducing mechanism and engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chongqing Longxin Engine Ltd. Assignor: Chongqing Longxin Engine Co., Ltd. Contract record no.: 2012500000045 Denomination of utility model: Engine decompression structure assembly and motorcycle comprising same Granted publication date: 20120111 License type: Exclusive License Record date: 20120508 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chongqing Longxin Engine Ltd. Assignor: Chongqing Longxin Engine Co., Ltd. Contract record no.: 2012500000045 Denomination of utility model: Engine decompression structure assembly and motorcycle comprising same Granted publication date: 20120111 License type: Exclusive License Record date: 20120508 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20140524 |