CN201546774U - Gasoline engine starting decompression device - Google Patents
Gasoline engine starting decompression device Download PDFInfo
- Publication number
- CN201546774U CN201546774U CN2009202075007U CN200920207500U CN201546774U CN 201546774 U CN201546774 U CN 201546774U CN 2009202075007 U CN2009202075007 U CN 2009202075007U CN 200920207500 U CN200920207500 U CN 200920207500U CN 201546774 U CN201546774 U CN 201546774U
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- CN
- China
- Prior art keywords
- semicircle
- semicircle pin
- lever
- camshaft
- pin
- 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 relates to a gasoline engine starting decompression device which comprises a semicircle pin and a spring, and is characterized in that one end of the section of the semicircle pin, which is in a semicircle is arranged in a round hole of a camshaft to an exhaust camshaft on axial direction, one end of the section of the semicircle pin, which is in a round shape is pressed and arranged on a fulcrum position of a lever on one end of the camshaft in interference fit, and the spring is arranged on the semicircle pin. The gasoline engine starting decompression device uses the semicircle pin and the lever to match and decompress, the fulcrum positions of the semicircle pin and the lever are connected in interference fit, the lever directly drives the semicircle pin to rotate or return back under the action of centrifugal force and spring force, thereby reducing strength reduction and time delay which are caused because of middle connection relation, leading an exhaust door to be rapidly opened or closed, increasing the decompression efficiency, and overcoming energy loss and environmental pollution of an existing decompression device which are brought because the exhaust door can not be closed in time. The structure is simple and compact, and the work is reliable.
Description
Technical field
The utility model relates to a kind of gasoline engine starting decompressor, relates in particular to a kind of motorcycle gasoline engine and starts decompressor.
Background technique
Adopt in the motorcycle gasoline engine intake and exhaust cam shaft assembly to start decompressor, light in the time of can making gasoline engine starting, flexible, be easy to start.At present, a kind of decompressor of adopting of motorcycle gasoline engine comprise the axle sleeve that is installed on the camshaft, axially be installed in semicircle pin in the circular hole that half slot and the half slot on the camshaft on the axle sleeve inner round wall form, the centrifuge arm of axially riveting with axle sleeve and be connected across centrifuge arm and axle sleeve on spring; Axle sleeve 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 axle sleeve 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 quit work, under the effect of spring, the centrifuge arm returning position simultaneously, drove the semicircle pin by the projection of the cylindrical body in the draw-in groove and recovers decompression state, and petrol engine continues next decompression process when starting once more.This kind decompressor complex structure, the rotation of semicircle pin and answer are to finish in the cylindrical body projection that drives on the semicircle pin by the draw-in groove on the centrifuge arm under the effect of centrifugal force and spring, therefore, are difficult to accomplish in time stop decompression, fast quick-recovery decompression state.
Summary of the invention
The purpose of this utility model provides a kind of gasoline engine starting decompressor simple in structure, and this decompressor can in time stop decompression, fast quick-recovery decompression state.
The purpose of this utility model is achieved in that a kind of gasoline engine starting decompressor, comprise semicircle pin and spring, it is characterized in that: semicircle pin cross section is that an end of semicircle axially is installed in the circular hole in the camshaft to the exhaust cam place, and semicircle pin cross section is pressed into the fulcrum location of the lever that is arranged on camshaft one end for an end interference fit of circle; Described spring is installed on the semicircle pin.
In order to make compact structure, described spring is installed on the semicircle pin between lever and the camshaft end face, and an end of spring is fixed on the lever, and the other end is fixed on the camshaft end face.
In order to prevent the semicircle bearing pin to play, the outside of described lever is provided with by the baffle plate of bolton on the camshaft end face.
Described lever comprises that the fixed angle structure is the long-armed and galianconism of one, in order accurately to control the rotation angle of lever, is provided with long-armed limiting board and galianconism limiting board between described baffle plate and the camshaft end face.
In order to make force transmission rapid, guarantee the timely return of lever, described spring is a torsion spring.
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, described semicircle pin circular arc exceeds cam base circle 0.2～0.4mm.
The utility model has following beneficial effect: the utility model adopts semicircle pin and lever mated decompression, the semicircle pin is connected with balance pivot position interference fit, lever directly drives the semicircle pin and rotates or returning position under the effect of centrifugal force and spring force, reduced that the strength that causes owing to middle annexation weakens and the delay of time, make exhaust valve to open or close rapidly, improved decompression efficient, overcome existing decompressor and can not in time close energy loss and the environmental pollution that brings owing to exhaust valve, and simple and compact for structure, reliable operation.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 the utility model structural representation;
Fig. 2 the utility model decompression state lever positions schematic representation;
The non-decompression state lever positions of Fig. 3 the utility model schematic representation;
Fig. 4 the utility model semicircle pin is in the decompression state schematic representation;
Fig. 5 the utility model semicircle pin is in non-decompression state schematic representation.
Embodiment
Embodiment, referring to accompanying drawing 1, a kind of gasoline engine starting decompressor, comprise semicircle pin 3 and spring 4, semicircle pin 3 cross sections are that an end of semicircle axially is installed in the circular hole in the camshaft 1 to exhaust cam 2 places, and semicircle pin 3 cross sections are pressed into the fulcrum location of the lever 5 that is arranged on camshaft 1 one ends for an end interference fit of circle; Described spring 4 is enclosed within on the semicircle pin 3 between lever 5 and camshaft 1 end face, and described spring 4 is a torsion spring, and its end is fixed on the lever 5, and the other end is fixed on camshaft 1 end face; The outside of described lever 5 is provided with by bolt 7 and is anchored on baffle plate 6 on camshaft 1 end face; Described semicircle pin 3 circular arcs exceed exhaust cam 2 basic circle 0.3mm.
Described lever 5 comprises that the structure of separating at a certain angle is long-armed 8 and a galianconism 9 of one; Be provided with long-armed decide limiting board 10 and galianconism limiting board 11 between described baffle plate 6 and camshaft 1 end face.With reference to accompanying drawing 2, during gasoline engine starting, lever long-armed 8 is affixed on the long-armed limiting board 10, referring to accompanying drawing 4, semicircle pin 3 exceeds the position of cam base circle 2 over against exhaust rocker arm, and exhaust rocker arm is lifted, expose the slit between exhaust valve and the exhaust valve seat, reduced inner pressure of air cylinder, petrol engine normally starts.Referring to accompanying drawing 3, when camshaft 1 rotating speed reached 500 commentaries on classics, long-armed 8 drive semicircle pin 3 under centrifugal action rotated to galianconism 9 and 11 applyings of galianconism limiting board; Referring to accompanying drawing 5, the position that semicircle pin 3 exceeds exhaust cam 2 generating circles goes to leaves exhaust rocker arm, and the exhaust rocker arm that lifts falls, and exhaust valve closing stops decompression.After petrol engine quits work, under the effect of spring 4, lever 5 returning positions, driving semicircle pin 3 simultaneously returns back to long-armed 8 and fits with long-armed limiting board 10, semicircle pin 3 exceeds the position of exhaust cam 2 basic circles over against exhaust rocker arm, exhaust valve is opened, and continues next decompression process when petrol engine starts once more.
Claims (7)
1. gasoline engine starting decompressor, comprise semicircle pin (3) and spring (4), it is characterized in that: semicircle pin (3) cross section is that an end of semicircle axially is installed in the circular hole in the camshaft (1) and locates to exhaust cam (2), and semicircle pin (3) cross section is pressed into the fulcrum location of the lever (5) that is arranged on camshaft (1) one end for an end interference fit of circle; Described spring (4) is installed on the semicircle pin.
2. decompressor as claimed in claim 1 is characterized in that: described spring (4) is a torsion spring; It is installed on the semicircle pin (3) between lever (5) and camshaft (1) end face, and an end of spring (4) is fixed on the lever (5), and the other end is fixed on camshaft (1) end face.
3. decompressor as claimed in claim 1 or 2 is characterized in that: the outside of described lever (5) is provided with by bolt (7) and is anchored on baffle plate (6) on camshaft (1) end face.
4. decompressor as claimed in claim 3, it is characterized in that: described lever (5) comprises that the fixed angle structure is long-armed (8) and the galianconism (9) of one, is provided with long-armed limiting board (10) and galianconism limiting board (11) between described baffle plate (6) and camshaft (1) end face.
5. decompressor as claimed in claim 1 or 2 is characterized in that: described semicircle pin (3) circular arc exceeds exhaust cam (2) basic circle 0.2～0.4mm.
6. decompressor as claimed in claim 3 is characterized in that: described semicircle pin (3) circular arc exceeds exhaust cam (2) basic circle 0.2～0.4mm.
7. decompressor as claimed in claim 4 is characterized in that: described semicircle pin (3) circular arc exceeds exhaust cam (2) basic circle 0.2～0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202075007U CN201546774U (en) | 2009-12-04 | 2009-12-04 | Gasoline engine starting decompression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202075007U CN201546774U (en) | 2009-12-04 | 2009-12-04 | Gasoline engine starting decompression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201546774U true CN201546774U (en) | 2010-08-11 |
Family
ID=42601947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202075007U Expired - Fee Related CN201546774U (en) | 2009-12-04 | 2009-12-04 | Gasoline engine starting decompression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201546774U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444444A (en) * | 2010-10-05 | 2012-05-09 | 铃木株式会社 | Decompression device for engine |
| CN111042890A (en) * | 2019-12-25 | 2020-04-21 | 重庆隆鑫机车有限公司 | Two-way positioning pressure reducing valve and engine |
| CN111120033A (en) * | 2019-12-26 | 2020-05-08 | 重庆隆鑫机车有限公司 | Light-weight pressure reducing valve and engine |
-
2009
- 2009-12-04 CN CN2009202075007U patent/CN201546774U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444444A (en) * | 2010-10-05 | 2012-05-09 | 铃木株式会社 | Decompression device for engine |
| CN102444444B (en) * | 2010-10-05 | 2014-04-30 | 铃木株式会社 | Decompression device for engine |
| CN111042890A (en) * | 2019-12-25 | 2020-04-21 | 重庆隆鑫机车有限公司 | Two-way positioning pressure reducing valve and engine |
| CN111120033A (en) * | 2019-12-26 | 2020-05-08 | 重庆隆鑫机车有限公司 | Light-weight pressure reducing valve and engine |
| CN111120033B (en) * | 2019-12-26 | 2021-12-07 | 重庆隆鑫机车有限公司 | Light-weight pressure reducing valve and 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 |
Granted publication date: 20100811 Termination date: 20171204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |