CN201412197Y - Universal gasoline engine camshaft - Google Patents
Universal gasoline engine camshaft Download PDFInfo
- Publication number
- CN201412197Y CN201412197Y CN2009201272614U CN200920127261U CN201412197Y CN 201412197 Y CN201412197 Y CN 201412197Y CN 2009201272614 U CN2009201272614 U CN 2009201272614U CN 200920127261 U CN200920127261 U CN 200920127261U CN 201412197 Y CN201412197 Y CN 201412197Y
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- gear
- cam
- axle
- main body
- exhaust cam
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Abstract
The utility model discloses a universal gasoline engine camshaft which comprises a gear, a shaft, an exhaust cam, an outlet cam and a decompression mechanism, wherein the end portion of the shaft is sleeved with the gear, the exhaust cam is arranged on the shaft close to the gear, and the outlet cam is arranged on the shaft away from the gear, the decompression mechanism is arranged on the back side of the gear, and the gear, the exhaust cam and the outlet cam are integrally shaped on the shaft through the injection molding with nylon. The universal gasoline engine camshaft can reduce the production cost under the condition of guaranteeing the strength, and the structure is simple and practical.
Description
Technical field:
The utility model relates to a kind of technical field of engines, particularly relates to a kind of logical machine camshaft.
Technical background:
Engine cam is a kind of important component part of engine valve actuating mechanism, and how the gear of present engine cam, exhaust cam and the cam of giving vent to anger are sleeved on the axle separately, and gear, exhaust cam and the cam of giving vent to anger adopt material castings such as cast steel more, this kind engine cam weight is big, slides easily.
During engine start, piston compresses the gas that sucks cylinder, proper functioning mechanism according to distribution device, at this moment inlet and exhaust valve all is in closed condition, near near the compression terminal point, the pressure in the cylinder is very high, and this can cause starting very difficulty, 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 to control effort, if when the power on operating grip or the starting bar of being applied to can not overcome above-mentioned gas pressure, operating grip or pin starting bar can have a rebound, and hurt human body or damage machine.
The too high problem of gas pressure in the cylinder during for the solution engine start, usually all be provided with the mechanism of decompressor on the available engine and start pressure release, its basic principle is that engine start is when arriving normal idling, make exhaust valve be in the adaptation opening state by the mechanism of decompressor, pressurized gas in the cylinder can enter outlet pipe by exhaust valve, thereby reduces the pressure of gas in the cylinder; After engine start was finished, mechanism of decompressor action resetted exhaust valve.
The most frequently used mechanism of decompressor is the centrifugal block structure that flies that is assembled together with camshaft at present, the centrifugal piece that flies is installed on the camshaft timing follower end face, centrifugally fly to be connected with on the piece decompression pin, the decompression pin is coaxial with camshaft, one end of decompression pin is arranged in the axial notch on the camshaft dome disc, before engine start arrives normal idling, it is centrifugal that to fly the centrifugal force that piece is subjected to also little, the decompression pin stretches out in that part of jack-up valve rocker on dome surface, makes exhaust valve be in suitable open mode; After engine start was finished, decompression pin was hidden in the groove of camshaft under the centrifugal drive that flies piece, and exhaust valve resets and recovers normal to-and-fro motion.Existing mechanism of decompressor complex structure, the low and poor reliability of intensity.
The model utility content:
The purpose of this utility model provides a kind of logical machine camshaft, and this logical machine camshaft can reduce manufacture cost under the situation of proof strength, simple in structure and practical.
For achieving the above object, the technical solution of the utility model is: design a kind of logical machine camshaft, comprise gear, axle, exhaust cam, the give vent to anger cam and the mechanism of decompressor, described shaft end is set with gear, on axle, be provided with exhaust cam near gear, on axle, be provided with the cam of giving vent to anger away from gear, be provided with the mechanism of decompressor at the described gear back side, its main points are: described gear, the exhaust cam and the cam of giving vent to anger use nylon one injection molded on described axle, so with gear, exhaust cam and give vent to anger cam with nylon one injection molded axle can spool on each parts reliably install, anti-sliding stop, owing to be to adopt nylon material, in proof strength, reduce the quality and the manufacture cost of logical machine camshaft, wear resistance is good.
Be provided with square opening on described gear, be provided with the installation journal stirrup in this square opening bilateral symmetry, the described mechanism of decompressor is made up of decompression main body, right angle spring, torsion spring and copper sheathing, and described right angle spring is
Type, this right angle spring one end passes installs the back side that journal stirrup is installed in described decompression main body gear, the described right angle spring the other end is fixed on the fixed block at the gear back side, be with copper sheathing near on this right angle spring of the mechanism of decompressor, be set with torsion spring in this copper sheathing outside, this torsion spring one end is against the gear back side, the other end is located at described decompression lower body part, described decompression main body top is " N " type, bottom bending and be provided with the reduction points vertical in the end with this decompression main body, described gear is passed in type front portion, described decompression main body top " N ", and this decompression lower body part is positioned at the side of axle and contacts with this sidewall, and described reduction points peak is higher than the dome of exhaust cam; Before engine start arrived normal idling, reduction points made exhaust valve be in suitable open mode above that part of jack-up valve rocker on dome surface, realized decompression.
The center line angle of the described exhaust cam and the cam of giving vent to anger is 108 ℃.
The center line angle of described exhaust cam and reduction points is 175～180 ℃, and the peak of described reduction points is higher than the dome 1.3～1.5mm of described exhaust cam, is the optimum pressurized parameter so, makes effect of easing stress better.
Effect of the present utility model: novelty simple in structure, owing to be to adopt nylon material, the colleague of proof strength, reduce the quality and the manufacture cost of logical machine camshaft; Mechanism of decompressor design is more reasonable, can not only realize starting decompression effectively, reliably, and the unburned mixture when having avoided engine start enters atmosphere, not only environmental protection but also energy-conservation.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the right elevation of Fig. 1;
Fig. 3 is the structural representation of decompression main body 5;
Fig. 4 is the plan view of Fig. 3.
Meaning of each numbering is in the above-mentioned accompanying drawing: 1. gear, 2. spool, and 3. exhaust cam, the cam 5. decompression main bodys of 4. giving vent to anger, 6. right angle spring, 7. torsion spring, 8. copper sheathing, 9. square opening is 10. installed journal stirrup, 11. fixed blocks, 12. reduction points.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described.
See also Fig. 1～Fig. 4: shown in logical machine camshaft, form by gear 1, axle 2, exhaust cam 3, the give vent to anger cam 4 and the mechanism of decompressor etc., described axle 2 ends are set with gear 1, on axle 2, be provided with exhaust cam 3 near gear 1, on axle 2, be provided with the cam 4 of giving vent to anger away from gear 1, be provided with the mechanism of decompressor at described gear 1 back side, described gear 1, exhaust cam 3 and give vent to anger cam 4 usefulness nylon one injection moldeds on described axle 2.
It can also be seen that in Fig. 1 and Fig. 2: be provided with square opening 9 on described gear 1, be provided with in these square opening 9 bilateral symmetry journal stirrup 10 is installed, the described mechanism of decompressor is made up of decompression main body 5, right angle spring 6, torsion spring 7 and copper sheathing 8, and described right angle spring 6 is
Type, these right angle spring 6 one ends pass installs the back side that journal stirrup 10 is installed in described decompression main body 5 gear 1, described right angle spring 6 the other ends are fixed on the fixed block 11 at gear 1 back side, be with copper sheathing 8 near on this right angle spring 6 of the mechanism of decompressor, be set with torsion spring 7 in these copper sheathing 8 outsides, these torsion spring 7 one ends are against gear 1 back side, the other end is located at described decompression main body 5 bottoms, described decompression main body 5 tops are " N " type, bottom bending and be provided with the reduction points 12 vertical in the end with this decompression main body 5, described gear 1 is passed in type front portion, described decompression main body 5 tops " N ", these decompression main body 5 bottoms are positioned at the side of axle 2 and contact with these axle 2 sidewalls, and described reduction points 12 peaks are higher than the dome of exhaust cam 3.
In Fig. 2 as can be seen: the center line angle of the described exhaust cam 3 and the cam 4 of giving vent to anger is 108 ℃; Described exhaust cam 3 is 175～180 ℃ with the center line angle of reduction points 12, and the peak of described reduction points 12 is higher than the dome 1.3～1.5mm of described exhaust cam 3.
Work of the present utility model is former: engine start is during to normal idling, make exhaust valve be in the adaptation opening state by the mechanism of decompressor, it is that part of jack-up valve rocker that reduction points stretches out in the dome surface, make exhaust valve be in suitable open mode, pressurized gas in the cylinder can enter outlet pipe by exhaust valve, thereby reduces the pressure of gas in the cylinder; After engine start was finished, reduction points was recovered to contact with the camshaft sidewall under the effect of torsion spring, and mechanism of decompressor action resets exhaust valve.
Claims (4)
1, a kind of logical machine camshaft, comprise gear (1), axle (2), exhaust cam (3), the cam of giving vent to anger (4) and the mechanism of decompressor, described axle (2) end is set with gear (1), on axle (2), be provided with exhaust cam (3) near gear (1), on axle (2), be provided with the cam of giving vent to anger (4) away from gear (1), be provided with the mechanism of decompressor at described gear (1) back side, it is characterized in that: described gear (1), exhaust cam (3) and the cam of giving vent to anger (4) use nylon one injection molded on described axle (2).
2, logical machine camshaft according to claim 1 is characterized in that: be provided with square opening (9) on described gear (1), be provided with in this square opening (9) bilateral symmetry journal stirrup (11) is installed; The described mechanism of decompressor is made up of decompression main body (5), right angle spring (6), torsion spring (7) and copper sheathing (8), and described right angle spring (6) is
Type, these right angle spring (6) one ends pass installs the back side that journal stirrup (10) is installed in described decompression main body (5) gear (1), described right angle spring (6) the other end is fixed on the fixed block (11) at gear (1) back side, be with copper sheathing (8) near on this right angle spring (6) of the mechanism of decompressor, be set with torsion spring (7) in this copper sheathing (8) outside, these torsion spring (7) one ends are against gear (1) back side, the other end is located at described decompression main body (5) bottom, described decompression main body (5) top is " N " type, bottom bending and be provided with the reduction points (12) vertical in the end with this decompression main body (5), described gear (1) is passed in type front portion, described decompression main body (5) top " N ", this decompression main body (5) bottom is positioned at the side of axle (2) and contacts with this axle (2) sidewall, and described reduction points (12) peak is higher than the dome of exhaust cam (3).
3, logical machine camshaft according to claim 1 is characterized in that: the center line angle of described exhaust cam (3) and the cam of giving vent to anger (4) is 108 ℃.
4, according to claim 1 or 2 described logical machine camshafts, it is characterized in that: described exhaust cam (3) is 175～180 ℃ with the center line angle of reduction points (12), and the peak of described reduction points (12) is higher than the dome 1.3～1.5mm of described exhaust cam (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201272614U CN201412197Y (en) | 2009-05-08 | 2009-05-08 | Universal gasoline engine camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201272614U CN201412197Y (en) | 2009-05-08 | 2009-05-08 | Universal gasoline engine camshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201412197Y true CN201412197Y (en) | 2010-02-24 |
Family
ID=41714082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201272614U Expired - Fee Related CN201412197Y (en) | 2009-05-08 | 2009-05-08 | Universal gasoline engine camshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201412197Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838206A (en) * | 2017-02-28 | 2017-06-13 | 重庆市祥陵机械股份有限公司 | Camshaft centrifugal device |
| CN108678825A (en) * | 2018-09-03 | 2018-10-19 | 重庆市祥陵机械股份有限公司 | A kind of novel camshaft |
-
2009
- 2009-05-08 CN CN2009201272614U patent/CN201412197Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838206A (en) * | 2017-02-28 | 2017-06-13 | 重庆市祥陵机械股份有限公司 | Camshaft centrifugal device |
| CN108678825A (en) * | 2018-09-03 | 2018-10-19 | 重庆市祥陵机械股份有限公司 | A kind of novel camshaft |
| CN108678825B (en) * | 2018-09-03 | 2024-03-29 | 重庆市钜铖机械有限公司 | Novel cam shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20110508 |