CN201705409U - Pressure reduction device of gasoline engine - Google Patents
Pressure reduction device of gasoline engine Download PDFInfo
- Publication number
- CN201705409U CN201705409U CN2010202141656U CN201020214165U CN201705409U CN 201705409 U CN201705409 U CN 201705409U CN 2010202141656 U CN2010202141656 U CN 2010202141656U CN 201020214165 U CN201020214165 U CN 201020214165U CN 201705409 U CN201705409 U CN 201705409U
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- piece
- wheel disc
- reduction valve
- gets rid
- rid
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Abstract
A pressure reduction device of a gasoline engine comprises a camshaft and a wheel disc arranged on the camshaft, and is characterized in that a reduction valve is arranged on the camshaft; a throw block is arranged on the wheel disc; one end of the throw block is connected with a tension spring arranged on the wheel disc, and the other end of the throw block is in contact with the reduction valve to realize pressure reduction and stop pressure reduction. The throw block on the wheel disc is utilized to control the reduction valve on the camshaft to reduce pressure, thereby realizing reasonable structure, easy assembly, lower cost and simple and reliable structure; and the exhaust valve can be rapidly opened or closed, thereby improving the pressure reduction efficiency, and overcoming the defects of low safety performance, large energy loss and severe pollution due to inflexible pressure reduction and untimely close of the exhaust valve.
Description
Technical field
The utility model relates to a kind of decompressor, relates in particular to a kind of petrol engine decompressor.
Background technique
Adopt in the petrol engine inlet and outlet cam assembly to start decompressor, can make petrol engine light, flexible when starting, be easy to start.The complex structure that present gasoline engine starting decompressor has, the manufacture cost height, component are many, and efficiency of assembling is low; The unreasonable structure that has is rotated dumbly, situations such as decompression inefficacys often occur, as the pressure reduction structure of multipoint positioning rotation, just very easily produces decompressor clamping stagnation or stuck phenomenon if the dimensional chain integrating error occur or the wearing and tearing of monolateral location in use occur; The structure that has is too simple, though manufacture cost is lower, easy deformation or wearing and tearing in the process of using cause decompression to lose efficacy.
A kind of petrol engine decompressor is arranged, comprise the wheel disc that is arranged on the camshaft, axially be installed in semicircle pin in the circular hole that half slot on the wheel disc inner round wall and the half slot on the camshaft form, with wheel disc axially riveted joint centrifuge arm and be connected across centrifuge arm and wheel disc on extension spring; Wheel disc be provided with centrifuge arm on the positioning seat of the locating slot engagement limits centrifuge arm angle of swing that is provided with, semicircle pin cross section is that the side of an end of cylinder is provided with to cooperate with the draw-in groove that is provided with on the centrifuge arm and drives the cylindrical body projection that the semicircle pin rotates, semicircle pin cross section is that an end of semicircle stretches out wheel disc to the exhaust cam place, and the circular arc of semicircle pin is higher than the exhaust cam generating circle.During gasoline engine starting, the position that the semicircle pin is higher than cam base circle faces exhaust rocker arm, and exhaust rocker arm is lifted, and exposes the gap between exhaust valve and the exhaust valve seat, thereby has lowered inner pressure of air cylinder, and petrol engine normally starts; After camshaft reached certain rotating speed, centrifuge arm rotated under action of centrifugal force, drove the semicircle pin by the projection of the cylindrical body in the draw-in groove and rotated, exhaust rocker arm is left at the position that makes the semicircle pin be higher than cam base circle, exhaust rocker arm falls, and exhaust valve closing stops decompression; After petrol engine quits work, under the effect of extension spring, the centrifuge arm returning position, simultaneously, drive the semicircle pin by the projection of the cylindrical body in the draw-in groove and recover decompression state, petrol engine continues next decompression process when starting once more, this decompressor complex structure, the manufacture cost height.
The model utility content
The purpose of this utility model is to provide a kind of petrol engine decompressor of rational in infrastructure, low cost of manufacture.
The purpose of this utility model is achieved in that a kind of petrol engine decompressor, comprise camshaft and the wheel disc that is arranged on the camshaft, it is characterized in that: described camshaft is provided with reduction valve, described wheel disc is provided with and gets rid of piece, described extension spring on getting rid of piece one end and being arranged on described wheel disc is connected, and the other end contacts and realize decompression, stops decompression with described reduction valve.
Open too much back and interfere with other parts in order to prevent to get rid of piece, guarantee that reduction valve can open fully simultaneously again, described wheel disc is provided with restriction and gets rid of the locating stud of piece the sphere of activities.
For reduction valve is opened flexibly, fast, described reduction valve is provided with convex closure and is arranged on the camshaft by the reduction valve mandrel, and described reduction valve mandrel and described reduction valve are Spielpassung.
For make get rid of piece can be fast under centrifugal action, open flexibly, the described piece that gets rid of is arranged on the described wheel disc by getting rid of the piece pin, described get rid of piece and get rid of be Spielpassung between the piece pin.
Reliable in order to connect, described extension spring one end is fixed on the wheel disc by tension spring pin, and the other end is connected with the described piece that gets rid of by being arranged on the above-mentioned tension spring hook that gets rid of on the piece.
In order to reduce cost and to be convenient to processing, described wheel disc adopts nylon plastic material, and above-mentioned locating stud, tension spring pin and wheel disc are structure as a whole, and are nylon plastic material.
The material of above-mentioned wheel disc also can adopt metal, and when adopting metal, above-mentioned locating stud, tension spring pin and described wheel disc are equipped riveted structure, and are metallic material.
To get rid of piece in order opening fast, flexibly, and to be convenient to adjust the size of centrifugal force, increase balancing weight on the piece getting rid of, described getting rid of adopts sintering to connect between piece and the balancing weight, and this balancing weight is arranged on the position of getting rid of the easiest generation centrifugal force on the piece.
For the ease of the control reduction valve, the described shift fork that gets rid of the front end of piece for the control reduction valve.
In order to prevent that reduction valve from coming off, described reduction valve mandrel outer end is provided with the step cylindrical.
In order to prevent that getting rid of piece comes off, be provided with big step cylindrical getting rid of piece pin outer end, this big step cylindrical is the may command scope that radially wobbles of getting rid of piece also.
In order to guarantee that valve opening reaches effect of easing stress but to be unlikely to make inner pressure of air cylinder to reduce too many, the outstanding cam base circle height of described reduction valve convex closure requires design according to different types.
When gasoline engine starting, the reduction valve convex closure makes valve opening but to be unlikely to make inner pressure of air cylinder to reduce too many, and the pulling force by extension spring guarantees reduction valve and gets rid of piece and do not throw off simultaneously, and reduction valve is in decompression state; When petrol engine work reaches certain speed, get rid of centrifugal force that piece produces along with the rotation of camshaft pulling force greater than extension spring, getting rid of piece counterclockwise rotates, and by the rotation of shift fork drive reduction valve, valve-closing stops decompression, inlet and outlet door proper functioning, after petrol engine quits work, the described piece returning position under the tension of extension spring of getting rid of.
The utlity model has following beneficial effect, the utility model reduces pressure by the reduction valve that gets rid of on the piece control camshaft that is arranged on the wheel disc, rational in infrastructure, assembling easily, not only reduced cost, and simple in structure, reliable, make exhaust valve to open or close rapidly, improved decompression efficient, overcome existing decompressor owing to the dumb exhaust valve that makes of decompression can not cut out in time that the Safety performance of bringing is low, energy loss is big and with serious pollution defective.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the utility model example structure schematic representation;
Fig. 2 is Fig. 1 side view;
Fig. 3 overlooks the decompression state schematic representation for Fig. 1;
Fig. 4 stops the decompression state schematic representation for Fig. 1 overlooks;
Fig. 5 is for getting rid of piece and getting rid of piece counterweight schematic representation;
Fig. 6 is Fig. 5 side view.
Embodiment
Referring to Fig. 3, when gasoline engine starting, the convex closure on the reduction valve 3 makes valve opening but to be unlikely to make inner pressure of air cylinder to reduce too many, and the pulling force by extension spring 5 guarantees reduction valve 3 and gets rid of piece 4 and do not throw off simultaneously, and reduction valve 3 is in decompression state;
Referring to Fig. 4, when petrol engine work reaches certain speed, get rid of centrifugal force that piece 4 produces along with the rotation of camshaft 1 pulling force greater than extension spring 5, get rid of piece 4 rotation counterclockwise, shift fork 7 drives reduction valve 3 rotations, valve-closing, stop decompression, inlet and outlet door proper functioning after petrol engine quits work, is got rid of piece 4 returning position under the tension of extension spring 5.
Claims (10)
1. petrol engine decompressor, comprise camshaft (1) and be arranged on wheel disc (2) on the camshaft (1), it is characterized in that: described camshaft (1) is provided with reduction valve (3), described wheel disc (2) is provided with and gets rid of piece (4), described extension spring (5) on getting rid of piece (4) one ends and being arranged on described wheel disc (2) is connected, and the other end contacts and realize decompression, stops decompression with described reduction valve (3).
2. decompressor as claimed in claim 1 is characterized in that: described wheel disc (2) is provided with restriction and gets rid of the locating stud (9) of piece (4) the sphere of activities.
3. decompressor as claimed in claim 1 or 2 is characterized in that: described reduction valve (3) is provided with convex closure and is arranged on the described camshaft (1) by reduction valve mandrel (6), and described reduction valve mandrel (6) is a Spielpassung with described reduction valve (3); The described piece (4) that gets rid of is arranged on the described wheel disc (2) by getting rid of piece pin (8), and the described piece (4) that gets rid of is a Spielpassung with the described piece pin (8) that gets rid of; Described extension spring (5) one ends are fixed on the wheel disc (2) by tension spring pin (11), the other end by be arranged on described get rid of on the piece (4) tension spring hook (10) with get rid of piece (4) and be connected.
4. decompressor as claimed in claim 3 is characterized in that: described wheel disc (2) adopts nylon plastic material, and described locating stud (9), tension spring pin (11) are structure as a whole with described wheel disc (2), are nylon plastic material.
5. decompressor as claimed in claim 3 is characterized in that: described wheel disc (2) adopts metallic material, and described locating stud (9), tension spring pin (11) are equipped riveted structure with described wheel disc (2), are metallic material.
6. decompressor as claimed in claim 1 or 2 is characterized in that: the described piece (4) that gets rid of is provided with balancing weight (12), and the described piece (4) that gets rid of is connected with balancing weight (12) sintering, the described shift fork (7) that gets rid of the front end of piece (12) for the control reduction valve.
7. decompressor as claimed in claim 3 is characterized in that: the described piece (4) that gets rid of is provided with balancing weight (12), and the described piece (4) that gets rid of is connected with balancing weight (12) sintering, the described shift fork (7) that gets rid of the front end of piece (12) for the control reduction valve.
8. decompressor as claimed in claim 4 is characterized in that: the described piece (4) that gets rid of is provided with balancing weight (12), and the described piece (4) that gets rid of is connected with balancing weight (12) sintering, the described shift fork (7) that gets rid of the front end of piece (12) for the control reduction valve.
9. decompressor as claimed in claim 5 is characterized in that: the described piece (4) that gets rid of is provided with balancing weight (12), and the described piece (4) that gets rid of is connected with balancing weight (12) sintering, the described shift fork (7) that gets rid of the front end of piece (12) for the control reduction valve.
10. decompressor as claimed in claim 3 is characterized in that: described reduction valve mandrel (6) outer end is provided with the step cylindrical that prevents that reduction valve (3) from coming off, and described piece pin (8) outer end of getting rid of is provided with and prevents to get rid of the big step cylindrical that piece (4) comes off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202141656U CN201705409U (en) | 2010-06-03 | 2010-06-03 | Pressure reduction device of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202141656U CN201705409U (en) | 2010-06-03 | 2010-06-03 | Pressure reduction device of gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201705409U true CN201705409U (en) | 2011-01-12 |
Family
ID=43442563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202141656U Expired - Fee Related CN201705409U (en) | 2010-06-03 | 2010-06-03 | Pressure reduction device of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201705409U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319493A (en) * | 2011-09-21 | 2012-01-18 | 孙士庆 | Backpack pneumatic extinguisher with V-type double-cylinder two-stroke gasoline engine as power source |
| CN103114885A (en) * | 2013-02-22 | 2013-05-22 | 慈溪市联发机械有限公司 | Camshaft decompressor |
| CN109026258A (en) * | 2018-08-16 | 2018-12-18 | 广州大运机车有限公司 | A kind of decompressor of engine |
-
2010
- 2010-06-03 CN CN2010202141656U patent/CN201705409U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319493A (en) * | 2011-09-21 | 2012-01-18 | 孙士庆 | Backpack pneumatic extinguisher with V-type double-cylinder two-stroke gasoline engine as power source |
| CN102319493B (en) * | 2011-09-21 | 2013-09-18 | 孙士庆 | Backpack pneumatic extinguisher with V-type double-cylinder two-stroke gasoline engine as power source |
| CN103114885A (en) * | 2013-02-22 | 2013-05-22 | 慈溪市联发机械有限公司 | Camshaft decompressor |
| CN109026258A (en) * | 2018-08-16 | 2018-12-18 | 广州大运机车有限公司 | A kind of decompressor of engine |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20180603 |