CN201916016U - General gasoline engine start pressure reducing device - Google Patents
General gasoline engine start pressure reducing device Download PDFInfo
- Publication number
- CN201916016U CN201916016U CN2010206892688U CN201020689268U CN201916016U CN 201916016 U CN201916016 U CN 201916016U CN 2010206892688 U CN2010206892688 U CN 2010206892688U CN 201020689268 U CN201020689268 U CN 201020689268U CN 201916016 U CN201916016 U CN 201916016U
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- reduction valve
- timing gear
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Abstract
The utility model discloses a general gasoline engine start pressure reducing device, which comprises a cam shaft (1). A gas inlet cam (2), an exhaust cam (3) and a timing gear (4) are arranged on the cam shaft (1), a flail block (5) and a flail block return device are disposed on the timing gear (4), one end of the flail block (5) is connected with the timing gear (4) via a flail block pin (6), a pressure reducing valve combination is arranged on the timing gear (4) and connected with the other end of the flail block (5), a flail block slide groove (7) is arranged on the flail block (5), and a positioning pin (8) is disposed in the flail block slide groove (7) and connected with the timing gear (4). The general gasoline engine start pressure reducing device not only has the advantages of reasonable structure and low manufacturing and assembling costs, but also has the advantages of flexible rotation, reliable work and high pressure reducing efficiency.
Description
Technical field
The utility model relates to a kind of general gasoline engines, and particularly a kind of general gasoline engines starts decompressor.
Background technique
During gasoline engine starting, all to the gas that suck in the cylinder be compressed, near the compression terminal point, gas pressure in the cylinder is very high, as not reducing pressure, will make very difficulty of hand pull starting-up, require great effort very much, so petrol engine is when starting, need make valve be in suitable open mode, suitably reduce pressure, behind gasoline engine starting, especially reach after the idling speed, need valve to be in closed condition again, the pressure-reducing function of decompressor is disappeared automatically, motor is in normal working.Now present, there is following shortcoming in employed general gasoline engines startup decompressor on the market:
1. some starts the decompressor complex structure, the fabricating cost height, and component are more, and efficiency of assembling is low.
2. unreasonable structure is got rid of piece and is rotated situations such as dumb, the frequent inefficacy that occurs reducing pressure.Such as the pressure reduction structure that adopts the multipoint positioning rotation,, just very easily produce decompressor clamping stagnation or stuck phenomenon if the dimensional chain integrating error occur or the wearing and tearing of monolateral location in use occur.
3. some startup decompressor structure is too simple, and manufacture cost is also cheaper, but very easily distortion or wearing and tearing in use for some time cause safety problems such as meeting appearance decompression inefficacy.
The utility model patent that a kind of name is called " general gasoline engines startup pressure relief device " is disclosed in CN2667167, it comprises camshaft, centrifuge arm and Returnning spring between the two, one decompression piece is vertically arranged on centrifuge arm, and the decompression piece is corresponding to the cam base circle position.Though it also can play the purpose of decompression, this device precision is lower, and sensitivity is relatively poor, the fabricating cost height.
The model utility content
The purpose of this utility model just provides a kind of rational in infrastructure, manufacturing and assembly cost is low, start the stable general gasoline engines of decompression starts decompressor.
The purpose of this utility model is to realize by such technological scheme, a kind of general gasoline engines starts decompressor, comprise camshaft, camshaft is provided with intake cam, exhaust cam and timing gear, timing gear are provided with and get rid of piece and get rid of the piece returning device, a described end that gets rid of piece is connected with timing gear by getting rid of the piece pin, and timing gear are provided with the reduction valve combination, and described reduction valve combination is connected with the other end that gets rid of piece; The described piece that gets rid of is provided with and gets rid of the piece chute, is provided with locating stud in getting rid of the piece chute, and described locating stud is connected with timing gear.
Wherein, the combination of described reduction valve comprises reduction valve mandrel, reduction valve finger and is arranged on groove on the exhaust cam, described reduction valve mandrel passes timing gear and penetrates in the groove, and described reduction valve finger one end is connected with the reduction valve mandrel, the other end with get rid of piece and be connected.
Further, describedly be provided with limiting stopper with reduction valve mandrel corresponding part getting rid of on the piece, limiting stopper is provided with the finger restraining groove, and an end of described reduction valve finger penetrates in the finger restraining groove.
In order to make force transmission rapid, guarantee the timely return of reduction valve, the described piece returning device that gets rid of comprises and gets rid of the piece extension spring, and a described end that gets rid of the piece extension spring is connected with timing gear by the tension spring pin that is arranged on the timing gear, the other end be arranged on the piece tension spring hook that gets rid of that gets rid of on the piece and be connected.
Owing to adopted technique scheme, the utility model not only to have rational in infrastructure, manufacturing and the low advantage of assembly cost, but also had following advantage:
1. get rid of piece and adopt monolateral location, make it can be under very little centrifugal action, fast, flexibly, the reduction valve of rotation drive is freely opened, simultaneously locating stud has limited and has got rid of the scope that piece and reduction valve combination are opened, closed, and has satisfied reduction valve convex closure reduction valve when needs decompression not and can open fully;
2. because rational in infrastructure, component are less, and it is easier to assemble, and has reduced manufacturing and assembly cost;
3. reliable operation, rotate flexibly, make exhaust valve to open or close rapidly, improved decompression efficient, overcome existing decompressor because the dumb exhaust valve that makes of decompression can not in time cut out, and the problem that the Safety performance of bringing is low, energy loss is big and environmental pollution is big.
Description of drawings
Description of drawings of the present utility model is as follows:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A sectional view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail; but the utility model is not limited to these mode of executions; any on the present embodiment essence spirit improvement or substitute, still belong to the utility model claim scope required for protection.
Embodiment 1: as shown in Figure 1, 2, a kind of general gasoline engines starts decompressor, comprise camshaft 1, camshaft 1 is provided with intake cam 2, exhaust cam 3 and timing gear 4, timing gear 4 are provided with and get rid of piece 5 and get rid of the piece returning device, a described end that gets rid of piece 5 is connected with timing gear 4 by getting rid of piece pin 6, and timing gear 4 are provided with the reduction valve combination, and described reduction valve combination is connected with the other end that gets rid of piece 5; The described piece 5 that gets rid of is provided with and gets rid of piece chute 7, is provided with locating stud 8 in getting rid of piece chute 7, and described locating stud 8 is connected with timing gear 4.
Locating stud 8 and get rid of the axial runout scope that piece chute 7 cooperates control to get rid of piece 5, get rid of piece 5 with restriction and open the generation decompression inefficacy of too much or very few back, therefore, spacing by the locating stud 8 that is installed on timing gear 4 end faces when getting rid of piece 5 and open in the certain limit, the effect of this locating stud 8 is to prevent to get rid of the scope that piece 5 is opened, and also limits simultaneously the reduction valve convex closure and can guarantee that when not needing to reduce pressure reduction valve opens fully.Be that because of getting rid of piece 5 single-point supports the location again, the centrifugal force that produces when camshaft 1 rotation can will get rid of piece 5 fast, neatly and open to counter clockwise direction, and stirs reduction valve by reduction valve finger 10 simultaneously and open fast, stops to reduce pressure;
The combination of described reduction valve comprises reduction valve mandrel 9, reduction valve finger 10 and is arranged on groove 11 on the exhaust cam 3, described reduction valve mandrel 9 passes timing gear 4 and penetrates in the groove 11, described reduction valve finger 10 1 ends are connected with reduction valve mandrel 9, the other end with get rid of piece 5 and be connected.
Describedly be provided with limiting stopper 12 with reduction valve mandrel 9 corresponding parts getting rid of on the piece 5, limiting stopper 12 is provided with finger restraining groove 13, and an end of described reduction valve finger 10 penetrates in the finger restraining groove 13.
It is in order to limit the cubic degrees of freedom of reduction valve finger 10, to prevent that the reduction valve built-up shaft from coming off outward that finger restraining groove 13 is set.
The described piece returning device that gets rid of comprises and gets rid of piece extension spring 14, and a described end that gets rid of piece extension spring 14 is connected with timing gear 4 by the tension spring pin 15 that is arranged on the timing gear 4, the other end be arranged on the piece tension spring hook 16 that gets rid of that gets rid of on the piece 5 and be connected.The pulling force that gets rid of piece extension spring 14 guarantees that camshaft 1 is when starting, reduction valve is a decompression state, when startup reaches certain rotating speed, get rid of centrifugal force that piece 5 produces along with the rotation of camshaft 1 greater than the pulling force that gets rid of piece extension spring 14, getting rid of piece 5 counterclockwise opens automatically, when opening, again by reduction valve finger 10 rotating opening to guarantee inlet and outlet door proper functioning.
Claims (4)
1. a general gasoline engines starts decompressor, comprise camshaft (1), camshaft (1) is provided with intake cam (2), exhaust cam (3) and timing gear (4), timing gear (4) are provided with and get rid of piece (5) and get rid of the piece returning device, a described end that gets rid of piece (5) is connected with timing gear (4) by getting rid of piece pin (6), it is characterized in that: timing gear (4) are provided with the reduction valve combination, and described reduction valve combination is connected with the other end that gets rid of piece (5); The described piece (5) that gets rid of is provided with and gets rid of piece chute (7), is provided with locating stud (8) in getting rid of piece chute (7), and described locating stud (8) is connected with timing gear (4).
2. general gasoline engines as claimed in claim 1 starts decompressor, it is characterized in that: the combination of described reduction valve comprises reduction valve mandrel (9), reduction valve finger (10) and is arranged on groove (11) on the exhaust cam (3), described reduction valve mandrel (9) passes timing gear (4) and penetrates in the groove (11), described reduction valve finger (10) one ends are connected with reduction valve mandrel (9), the other end with get rid of piece (5) and be connected.
3. general gasoline engines as claimed in claim 2 starts decompressor, it is characterized in that: described piece (5) is gone up and reduction valve mandrel (9) corresponding part is provided with limiting stopper (12) getting rid of, limiting stopper (12) is provided with finger restraining groove (13), and an end of described reduction valve finger (10) penetrates in the finger restraining groove (13).
4. general gasoline engines as claimed in claim 3 starts decompressor, it is characterized in that: the described piece returning device that gets rid of comprises and gets rid of piece extension spring (14), a described end that gets rid of piece extension spring (14) is connected with timing gear (4) by the tension spring pin (15) that is arranged on the timing gear (4), the other end be arranged on the piece tension spring hook (16) that gets rid of that gets rid of on the piece (5) and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206892688U CN201916016U (en) | 2010-12-30 | 2010-12-30 | General gasoline engine start pressure reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206892688U CN201916016U (en) | 2010-12-30 | 2010-12-30 | General gasoline engine start pressure reducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201916016U true CN201916016U (en) | 2011-08-03 |
Family
ID=44415816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206892688U Expired - Lifetime CN201916016U (en) | 2010-12-30 | 2010-12-30 | General gasoline engine start pressure reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201916016U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454073A (en) * | 2014-12-10 | 2015-03-25 | 重庆市银钢一通科技有限公司 | Engine and camshaft decompressor thereof |
| CN104481629A (en) * | 2014-12-10 | 2015-04-01 | 重庆市银钢一通科技有限公司 | Camshaft reliever |
-
2010
- 2010-12-30 CN CN2010206892688U patent/CN201916016U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454073A (en) * | 2014-12-10 | 2015-03-25 | 重庆市银钢一通科技有限公司 | Engine and camshaft decompressor thereof |
| CN104481629A (en) * | 2014-12-10 | 2015-04-01 | 重庆市银钢一通科技有限公司 | Camshaft reliever |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |
|
| CX01 | Expiry of patent term |