CN2761852Y - Start pressure reducing device on engine cylinder end of motorcycle - Google Patents
Start pressure reducing device on engine cylinder end of motorcycle Download PDFInfo
- Publication number
- CN2761852Y CN2761852Y CN 200520016123 CN200520016123U CN2761852Y CN 2761852 Y CN2761852 Y CN 2761852Y CN 200520016123 CN200520016123 CN 200520016123 CN 200520016123 U CN200520016123 U CN 200520016123U CN 2761852 Y CN2761852 Y CN 2761852Y
- Authority
- CN
- China
- Prior art keywords
- position limit
- limit pin
- cylinder head
- engine cylinder
- way element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a cylinder end starting decompressor of a motorcycle engine. An installation hole is additionally processed on a cylinder end on the basis of a cam shaft and a starting decompressor provided with an isolator, and a spacing pin device whose spacing pin is extensible in the axial direction is installed. The installation position of the spacing pin of the spacing pin device is in a rotary track of a convex block of an external circle of the isolator to make the convex block of the external circle of the isolator obstructed by the spacing pin and make an air discharging door has a certain angle to be convenient for next starting when the isolator is relatively reversed to rotate. The utility model has the advantages that the structure is very simple, the installation steps are simlified to make the matching state of the assembly of the cylinder end simple, and the utility model is favorable for the structure of the cylinder end to be more compact. The utility model also has the advantages of convenient maintenance, replacement and adjustment, etc.
Description
Technical field
The utility model relates to the engine start auxiliary device, and especially motorcycle engine starts reduction valve.
Background technique
Motorcycle engine usually starts with manpower, because engine compression ratio than higher, is relatively required great effort during startup.Resistance when starting in order to reduce makes to start more conveniently, and prior art generally is equipped with reduction valve on cylinder head, and reduction valve is opened exhaust valve before startup, makes the gas pressure of firing chamber reduce, thereby avoids the difficulty that starts; Referring to Fig. 1-Fig. 5, rocking arm 2 and camshaft 5 are installed in the cylinder head 1, reduction valve is made up of one-way element 6 and limiting board assembly 3, wherein one-way element 6 is contained on the camshaft 5, and the stopping device of one-way element---be that the limiting board assembly is contained on the cylinder head with valve rocker and pitman arm shaft, when one-way element during with the camshaft proper motion, 4 pairs of one-way elements 6 of limiting board in the limiting board assembly do not play position-limiting action, and when engine stoping operation, because effect of inertia, be equivalent to the camshaft antiport, the damp block 14 of the projection 16 limited plates on the one-way element stops at this moment, reach the effect of the one-way element running on the limiting board restriction camshaft, make exhaust valve open decompression simultaneously, easy when being convenient to start next time.But, the structure of relief pressure valve more complicated of this structure, limiting board assembly wherein is made up of a plurality of parts, its installation also relates to a plurality of parts such as pitman arm shaft, camshaft, can make the complicated and requirement raising of mated condition of cylinder head assembling, simultaneously, be unfavorable for the compact requirement of cylinder head structure.
The model utility content
The purpose of this utility model is: solve the problem that above-mentioned prior art exists, provide a kind of motorcycle engine cylinder head simple in structure to start decompressor.
In order to achieve the above object, motorcycle engine cylinder head of the present utility model starts decompressor, comprise cylinder head, camshaft, one-way element is installed on the camshaft, and the one-way element cylindrical is provided with projection, and on cylinder head processing mounting holes in addition, the position limit pin device that position limit pin can axial stretching is installed in mounting hole, the position limit pin mounting point of position limit pin device is within the rotating locus of described one-way element cylindrical projection, and when making the relative counterrotating of one-way element, the projection of one-way element cylindrical is subjected to position limit pin to be stopped.When the motor proper functioning, the one-way element on the camshaft rotates with camshaft, and this moment, the position limit pin on the cylinder head can be withdrawn and inoperative; When engine stoping operation, utilize effect of inertia, the relative counterrotating of camshaft, the one-way element running on the position limit pin restriction this moment camshaft makes exhaust valve open certain angle simultaneously, easy when being convenient to start next time.The utility model is with respect to prior art, be equivalent to replace the limiting board assembly etc. of prior art with position limit pin device that can axial stretching, the position limit pin device is installed in the mounting hole of processing on the cylinder head, structure is very simple, and saved in the installation steps of limiting board assembly in cylinder head and saved original limiting board assembly installing space, make the mated condition of cylinder head assembling simple, and it is compact more to help the cylinder head structure.
Above-mentioned position limit pin device can adopt down array structure: position limit pin is made as outer little interior big step axle, the mounting hole shape is corresponding with the position limit pin step, with the distance that the restriction position limit pin stretches out mounting hole, the mounting hole the other end is laid plug, mounting spring between plug and position limit pin.Make full use of the wall thickness of cylinder head, keep position limit pin to be in the state of stretching out, and under the normal rotation state with spring, the projection of one-way element by the time, make the withdrawal of position limit pin pressure spring and inoperative; Plug then forms these part shutoff whole position limit pin device that can axial stretching in the mounting hole of cylinder head.
Position limit pin is processed into hollow tubular.Alleviate the quality of position limit pin, reduce inertia, improve flexible response frequency.
Position limit pin is established the step hole of mounting spring.Spring is placed this step hole, save installing space, be beneficial to also can adopt this device under the less situation of cylinder head wall ratio.
Plug adopts screw plug.Be convenient to maintenance, replacing, adjustment etc.
The shaft axis of described position limit pin and the axis parallel of camshaft.Be beneficial to the position of processing and adjustment position limit pin and one-way element cylindrical projection, assurance device is in the optimum state.
The utility model has the advantages that: owing to replaced limiting board assembly etc. with the position limit pin device, the position limit pin device is installed in the mounting hole of processing on the cylinder head, structure is very simple, and saved in the installation steps of limiting board assembly in cylinder head and saved original limiting board assembly installing space, make the mated condition of cylinder head assembling simple, and it is compact more to help the cylinder head structure, also has advantages such as the maintenance of being convenient to, replacing, adjustment.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the prior art constructions schematic representation.
Fig. 2 is the structural representation half-twist that Fig. 1 convexity wheel shaft is installed one-way element.
Fig. 3 is the structural representation of limiting board assembly among Fig. 1.
Fig. 4 is Fig. 3 plan view.
Fig. 5 is the schematic representation that stops that one-way element is subjected to limiting board.
Fig. 6 is a structural representation of the present utility model.
Fig. 7 is the worm's eye view of Fig. 6, the schematic representation of the particular location of processing mounting holes on cylinder head.
Fig. 8 is that the A-A sectional view of Fig. 7 amplifies.
Fig. 9 is the position limit pin structural representation of Fig. 8.
Figure 10 is the schematic representation that stops that one-way element is subjected to position limit pin.
Figure 11 is the structure of mounting hole schematic representation of Fig. 8.
Figure 12 is the another kind of example structure schematic representation of position limit pin device.
Embodiment
Referring to accompanying drawing 6-Figure 12, motorcycle engine cylinder head of the present utility model starts decompressor, comprise cylinder head 1, camshaft 5, one-way element 6 is installed on the camshaft 5, one-way element 6 cylindricals are provided with projection 16, in the processing of the axis parallel of cylinder head 1 upper side and camshaft 5 mounting hole 10, the position limit pin device that position limit pin can axial stretching is installed in mounting hole 10, the mounting point of the position limit pin 7 of position limit pin device just in time is within the rotating locus of described one-way element 6 cylindrical projections 16, such purpose is to make when the relative counterrotating of one-way element 6, and the projection 16 of one-way element 6 cylindricals is subjected to position limit pin 7 to be stopped.
The structure of above-mentioned position limit pin device adopts: position limit pin 7 is made as outer little interior big step axle, the shape of mounting hole 10 is corresponding with the step of position limit pin 7, to limit the distance that position limit pin 7 stretches out mounting hole 10, the other end machining screw of mounting hole 10 is installed plug 9, mounting spring 8 between plug 9 and position limit pin 7, position limit pin 7 is processed into hollow tubular and establishes the step hole of mounting spring at mounting end, and spring places this step hole; Keep position limit pins 7 to be in the state of stretching out with spring 8, under the normal rotation state, the projection of one-way element by the time, position limit pin 7 pressure springs, 8 withdrawals and inoperative; 9 of plugs form whole position limit pin device that can axial stretching with position limit pin 7, pressure spring 8 shutoff in the mounting hole 10 of cylinder head.
Referring to accompanying drawing 12, the position limit pin device also can adopt as scheming whole structure, and promptly mounting hole 10 is processed into through hole, and uses the plug shutoff in the steel bushing of an integral body on position limit pin, spring, position limit pin can axial stretching but can not deviate from fully, and steel bushing is crossed to win and is installed in the mounting hole.
It should be noted last that above embodiment is only in order to explanation the technical solution of the utility model and unrestricted, the technical solution of the utility model made amendment or is equal to replacement that it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (6)
1. a motorcycle engine cylinder head starts decompressor, comprise cylinder head, camshaft, one-way element is installed on the camshaft, the one-way element cylindrical is provided with projection, it is characterized in that: on cylinder head (1), be processed with mounting hole (10), the position limit pin device that position limit pin (7) can axial stretching is installed in the mounting hole (10), the position limit pin of position limit pin device (7) mounting point is within the rotating locus of described one-way element cylindrical projection (16), make one-way element (6) relatively during counterrotating, the projection (16) of one-way element (6) cylindrical is subjected to position limit pin (7) to be stopped.
2. motorcycle engine cylinder head according to claim 1 starts decompressor, it is characterized in that: described position limit pin device is: position limit pin (7) is made as outer little interior big step axle, mounting hole (10) shape is corresponding with position limit pin (7) step, stretch out the distance of mounting hole (10) with restriction position limit pin (7), mounting hole (10) the other end is laid plug (9), mounting spring (8) between plug (9) and position limit pin (7).
3. motorcycle engine cylinder head according to claim 2 starts decompressor, and it is characterized in that: described position limit pin (7) is processed into hollow tubular.
4. motorcycle engine cylinder head according to claim 3 starts decompressor, and it is characterized in that: described position limit pin (7) is established the step hole of mounting spring (8).
5. motorcycle engine cylinder head according to claim 2 starts decompressor, it is characterized in that: described plug (9) adopts screw plug.
6. start decompressor according to the described arbitrary money motorcycle engine cylinder head of claim 1-5, it is characterized in that: the axis parallel of the shaft axis of described position limit pin (7) and camshaft (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520016123 CN2761852Y (en) | 2004-07-20 | 2005-04-14 | Start pressure reducing device on engine cylinder end of motorcycle |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420060383.3 | 2004-07-20 | ||
| CN200420060383 | 2004-07-20 | ||
| CN 200520016123 CN2761852Y (en) | 2004-07-20 | 2005-04-14 | Start pressure reducing device on engine cylinder end of motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2761852Y true CN2761852Y (en) | 2006-03-01 |
Family
ID=36094980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520016123 Expired - Fee Related CN2761852Y (en) | 2004-07-20 | 2005-04-14 | Start pressure reducing device on engine cylinder end of motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2761852Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131111B (en) * | 2007-09-21 | 2010-06-02 | 隆鑫工业有限公司 | Pressure reducing device of water-cooled engine |
| CN106524872A (en) * | 2016-08-30 | 2017-03-22 | 重庆红宇精密工业有限责任公司 | Detection tool for invisible narrow groove |
| CN110500157A (en) * | 2019-09-12 | 2019-11-26 | 江门市大长江集团有限公司 | Position limiting structure and engine cylinder head decompressor |
-
2005
- 2005-04-14 CN CN 200520016123 patent/CN2761852Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101131111B (en) * | 2007-09-21 | 2010-06-02 | 隆鑫工业有限公司 | Pressure reducing device of water-cooled engine |
| CN106524872A (en) * | 2016-08-30 | 2017-03-22 | 重庆红宇精密工业有限责任公司 | Detection tool for invisible narrow groove |
| CN110500157A (en) * | 2019-09-12 | 2019-11-26 | 江门市大长江集团有限公司 | Position limiting structure and engine cylinder head decompressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING ZONGSHEN ENGINE MANUFACTURING CO. Free format text: FORMER OWNER: CHONGQING ZONGSHEN TECHNOLOGY DEVELOPMENT + RESEARCH CO., LTD. Effective date: 20071221 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071221 Address after: Shen Shen industrial park, Banan District, Chongqing, China: 400054 Patentee after: Chongqing Zongshen Engine Manufacturing Co., Ltd. Address before: No. 25 Erlang Road, Chongqing hi tech Development Zone, Shiqiaopu, 400039 Patentee before: Chongqing Zongshen Technology Development & Research Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060301 Termination date: 20130414 |