CN101749373A - A kind of gear transmission of diesel engine - Google Patents
A kind of gear transmission of diesel engine Download PDFInfo
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- CN101749373A CN101749373A CN200810186403A CN200810186403A CN101749373A CN 101749373 A CN101749373 A CN 101749373A CN 200810186403 A CN200810186403 A CN 200810186403A CN 200810186403 A CN200810186403 A CN 200810186403A CN 101749373 A CN101749373 A CN 101749373A
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- gear
- crankshaft
- camshaft
- diesel engine
- intermediate gear
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Abstract
The present invention discloses a kind of gear transmission of diesel engine, comprises intermediate gear (21), crankshaft gear (16), camshaft gear wheel (1), fuel injection pump gear (20), oil pump gear (17); Described intermediate gear (21) is positioned at the middle part of cylinder block (22); Described camshaft gear wheel (1) is positioned at the upper right of described intermediate gear (21), and meshes with described intermediate gear (21); Described crankshaft gear (16) is positioned at the below of described intermediate gear (21), and meshes with described intermediate gear (21); Described fuel injection pump gear (20) is positioned at the upper left side of described intermediate gear (21), and meshes with described intermediate gear (21); Described oil pump gear (17) is positioned at the below of described crankshaft gear (16), and meshes with described crankshaft gear (16).By optimizing arrangement between gear, can make the spatial structure of diesel engines more compact.
Description
Technical field
The present invention relates to the technical field of motor and mechanical transmission combination, is a kind of gear transmission of diesel engine specifically.
Background technique
Distribution device is the important component part of motor, can be according to the needs of each cylinder working process of motor, and time opening and close the inlet and outlet door for diesel engine, makes fresh air in time be entered cylinder, and waste gas is in time discharged cylinder.At present, the distribution device of motor uses overhead valve more, and wherein use the most extensive with cam axle underneath type valve mechanism again: its inlet and outlet door all is contained on the cylinder head; Camshaft is contained in the crankcase.
See also Fig. 1, this figure is the schematic representation of an existing distribution device.This distribution device mainly comprises camshaft gear wheel 1, camshaft 2, tappet 3, push rod 4, rocker shaft bed 5, pitman arm shaft 6, adjusts compositions such as screw and nut 7, rocking arm 8, locker 9, spring seat 10, valve 11, valve rod oil sealing 12, spring 13, conduit 14, air valve seat ring 15, crankshaft gear 16.During ventilation, rotate by crankshaft gear 16, camshaft gear wheel 1 drive cam shaft 2 by bent axle, make the cam lobe on the camshaft 2 partly pass through tappet 3, push rod 4, adjust screw and nut 7, promote rocking arm 8 rotations; the other end of rocking arm 8 is just pushed valve 11 downwards open, and spring 13 is further compressed; After the summit of cam lobe part turns over tappet 3, just reduce thrust gradually to tappet 3, valve 11 is under the tension force effect of spring 13, and the valve opening degree reduces gradually, and until closing at last, air inlet or exhaust process promptly come to an end.In compression and the expansion space stroke, valve 11 is tight closing under the effect of spring 13, makes cylinder airtight.
In the prior art, camshaft is driven by transmission device by bent axle, and used transmission device has gear type, chain type, Toothed belt formula etc., many at present employings gear transmission shown in Figure 1.For diesel engine, camshaft and crankshaft center distance are generally bigger, and need drive Injection Pump simultaneously, idle pulley in the middle of therefore needing to add, following brief description.
See also Fig. 2, this figure is the schematic representation of an existing diesel pinion unit.This gear transmission of diesel engine comprises camshaft gear wheel 1, crankshaft gear 16, oil pump gear 17, first middle idle pulley 18, the second middle idle pulley 19, fuel injection pump gear 20, wherein: crankshaft gear 16 is arranged between first middle idle pulley 18, the second middle idle pulley 19, and meshes with both respectively; Idle pulley 19 both sides in the middle of camshaft gear wheel 1, fuel injection pump gear 20 are arranged at second respectively, and be engaged with respectively; Idle pulley 18 belows in the middle of oil pump gear 17 is arranged at first, and be engaged with.Because of idle pulley in the middle of being provided with two, the structure of this pinion unit is compact inadequately, if expand cylinder, then the water channel between cylinder and valve actuating push rod hole is very narrow, influences the proper flow of cooling water, and also is difficult on the casting technique realizing.
Summary of the invention
In view of this, the invention provides a kind of gear transmission of diesel engine, can make the spatial structure of diesel engines more compact.
For solving above technical problem, the technological scheme of gear transmission of diesel engine of the present invention is: comprise intermediate gear (21), crankshaft gear (16), camshaft gear wheel (1), fuel injection pump gear (20), oil pump gear (17); Described intermediate gear (21) is positioned at the middle part of cylinder block (22); Described camshaft gear wheel (1) is positioned at the upper right of described intermediate gear (21), and meshes with described intermediate gear (21); Described crankshaft gear (16) is positioned at the below of described intermediate gear (21), and meshes with described intermediate gear (21); Described fuel injection pump gear (20) is positioned at the upper left side of described intermediate gear (21), and meshes with described intermediate gear (21); Described oil pump gear (17) is positioned at the below of described crankshaft gear (16), and meshes with described crankshaft gear (16).
Preferably, described camshaft gear wheel (1) center is 71.86 ± 5mm with respect to the horizontal equivalent at described intermediate gear (21) center, and vertically distance is 37.97 ± 5mm.
Preferably, described fuel injection pump gear (20) center is 81.3 ± 5mm with respect to the horizontal equivalent at described intermediate gear (21) center, and vertically distance is 10.2 ± 5mm.
Preferably, described intermediate gear (21) center is 8.7 ± 5mm with respect to the horizontal equivalent at described crankshaft gear (16) center, and vertically distance is 64.2 ± 5mm.
Preferably, described oil pump gear (17) center is 22 ± 5mm with respect to the horizontal equivalent at described crankshaft gear (16) center, and vertically distance is 37 ± 5mm.
Preferably, the velocity ratio between described crankshaft gear (16) and the described camshaft gear wheel (1) is 2: 1.
Preferably, be provided with the valve timing mark between described camshaft gear wheel (1) and the described intermediate gear (21); Be provided with the injection timing mark between described fuel injection pump gear (20) and the described intermediate gear (21); Be provided with shared timing mark between described crankshaft gear (16) and the described intermediate gear (21).
Preferably, described camshaft gear wheel (1), crankshaft gear (16), fuel injection pump gear (20) are helical gear.
Preferably, described crankshaft gear (16), camshaft gear wheel (1), fuel injection pump gear (20) are steel.
Compared with prior art, gear transmission of diesel engine provided by the invention, by optimizing the arrangement between gear, can make the spatial structure of diesel engines more compact, particularly: an intermediate gear only is set, the arrangement of each gear is more compact, and structure is more reasonable, helps increasing cylinder space; Because change also strengthens the valve cam axis hole with respect to the cylinder axis position, making has enough spaces intensifying cylinder diameter.
Description of drawings
Fig. 1 is the schematic representation of an existing distribution device;
Fig. 2 is the schematic representation of an existing diesel pinion unit;
Fig. 3 is the overall plan layout plan of gear transmission of diesel engine of the present invention;
Fig. 4 is the mutual alignment coordinate graph of a relation of each gear in gear transmission of diesel engine one preferred embodiment of the present invention.
Among Fig. 1-4, relevant reference character is as follows:
1, camshaft gear wheel; 2, camshaft; 3, tappet;
4, push rod; 5, rocker shaft bed; 6, pitman arm shaft;
7, adjust screw and nut; 8, rocking arm; 9, locker;
10, spring seat; 11, valve; 12, valve rod oil sealing;
13, spring; 14, conduit; 15, air valve seat ring;
16, crankshaft gear; 17, oil pump gear; 18, first idle pulley;
19, second idle pulley; 20, fuel injection pump gear; 21, intermediate gear;
22, cylinder block.
Embodiment
Basic design of the present invention is that an intermediate gear is set; And the relative position between the corresponding adjustment camshaft gear wheel, fuel injection pump gear, crankshaft gear, oil pump gear.
Specify below in conjunction with accompanying drawing and embodiment.
See also Fig. 3, this figure is the overall plan layout plan of gear transmission of diesel engine of the present invention.This gear transmission of diesel engine comprises intermediate gear 21, crankshaft gear 16, camshaft gear wheel 1, fuel injection pump gear 20, oil pump gear 17, wherein:
Described intermediate gear 21 is positioned at the middle part of cylinder block 22;
Described camshaft gear wheel 1 is positioned at the upper right of described intermediate gear 21, and with described intermediate gear 21 engagements;
Described crankshaft gear 16 is positioned at the below of described intermediate gear 21, and with described intermediate gear 21 engagements;
Described fuel injection pump gear 20 is positioned at the upper left side of described intermediate gear 21, and with described intermediate gear 21 engagements;
Described oil pump gear 17 is positioned at the below of described crankshaft gear 16, and with described crankshaft gear 16 engagements.
Camshaft gear wheel 1, crankshaft gear 16, fuel injection pump gear 20 are meshed with intermediate gear 21 respectively, and oil pump gear 17 is meshed with crankshaft gear 16, and this just makes whole diesel oil function run well.
Especially, the velocity ratio between described crankshaft gear 16 and the described camshaft gear wheel 1 is 2: 1, this be because: work cycle of the every work of four stroke engine, bent axle are rotated two circles; And the inlet and outlet of each cylinder once, also is that camshaft only need rotate a circle.
Especially, described camshaft gear wheel 1, crankshaft gear 16, fuel injection pump gear 20 are timing gear, particularly: be provided with the valve timing mark between camshaft gear wheel 1 and the intermediate gear 21; Be provided with the injection timing mark between fuel injection pump gear 20 and the intermediate gear 21; Be provided with shared timing mark between crankshaft gear 16 and the intermediate gear 21; During assembling, must be with each timing mark alignment, to guarantee valve timing.
Usually, smooth-going in order to make gear engagement, reduce noise and wearing and tearing, timing gear such as camshaft gear wheel 1, crankshaft gear 16, fuel injection pump gear 20 all adopt helical gear.Described crankshaft gear 16, camshaft gear wheel 1, fuel injection pump gear 20 mostly are steel; Correspondingly, described oil pump gear 17, intermediate gear 21 also can be steel.
In order to adapt to the needs that more high-power cylinder diameter is arranged, in design process, fully take into account helical gear advantage, and combine with the shape of body is close, the mutual alignment of each gear is optimized.One of them is to enlarge the spacing of camshaft gear wheel 1 to intermediate gear 21, is summarized as follows:
According to the distribution rule, at first determine the velocity ratio between each gear; Establish intermediate gear 21 again and be master gear, calculate parameters such as modification coefficient; Take all factors into consideration then and expand cylinder, gas distribution system layout, machine shape needs, determine central hole location; Change also strengthens the position of valve cam axis hole with respect to cylinder block 22 centers, so that the diameter of enough space intensifying cylinder bodies 22 is arranged, thereby has formed new train of gearings and the gear parameter of a cover.In this design process, consider rotatablely moving of crankshaft-link rod the route of process, calculate the arrangement of determining whole gear transmission of diesel engine by gear meshing.
The location arrangements of the utility model pinion unit fully combines with the shape of body, below is its optimal way.
See also Fig. 4, this figure is the mutual alignment coordinate graph of a relation of each gear in gear transmission of diesel engine one preferred embodiment of the present invention.Among Fig. 4, the relative position size of each train of gearings is as follows:
Camshaft gear wheel 1 center is 71.86 ± 5mm with respect to the horizontal equivalent L2 at intermediate gear 21 centers, and vertically distance H 2 is 37.97 ± 5mm;
Fuel injection pump gear 20 centers are 81.3 ± 5mm with respect to the horizontal equivalent L1 at intermediate gear 21 centers, and vertically distance H 1 is 10.2 ± 5mm;
Determine the relative position of camshaft gear wheel 1, fuel injection pump gear 20, intermediate gear 21, crankshaft gear 16, oil pump gear 17, and after optimizing the parameter (parameter of intermediate gear 21 shown in the parameter of crankshaft gear 16 as shown in table 1, the table 2) of each gear, just make and above-mentioned five meshed transmission gear form new engine gear power train.
Table 1 crankshaft gear parameter
Table 2 intermediate gear parameter
In addition, also can design the parameter of other gear, not repeat them here according to theoretical calculation.
Compared with prior art, gear transmission of diesel engine provided by the invention, by optimizing the arrangement between gear, can make the diesel engines spatial structure more compact, particularly: an intermediate gear 21 only is set, the arrangement of each gear is more compact, and structure is more reasonable, helps increasing cylinder block 22 spaces; Because change also strengthens the valve cam axis hole with respect to cylinder block 22 central positions, making has enough spaces intensifying cylinder body 22 diameters.
The above only is a preferred implementation of the present invention, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, and protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a gear transmission of diesel engine is characterized in that, comprises intermediate gear (21), crankshaft gear (16), camshaft gear wheel (1), fuel injection pump gear (20), oil pump gear (17); Described intermediate gear (21) is positioned at the middle part of cylinder block (22); Described camshaft gear wheel (1) is positioned at the upper right of described intermediate gear (21), and meshes with described intermediate gear (21); Described crankshaft gear (16) is positioned at the below of described intermediate gear (21), and meshes with described intermediate gear (21); Described fuel injection pump gear (20) is positioned at the upper left side of described intermediate gear (21), and meshes with described intermediate gear (21); Described oil pump gear (17) is positioned at the below of described crankshaft gear (16), and meshes with described crankshaft gear (16).
2. gear transmission of diesel engine as claimed in claim 1 is characterized in that, described camshaft gear wheel (1) center is 71.86 ± 5mm with respect to the horizontal equivalent at described intermediate gear (21) center, and vertically distance is 37.97 ± 5mm.
3. gear transmission of diesel engine as claimed in claim 1 is characterized in that, described fuel injection pump gear (20) center is 81.3 ± 5mm with respect to the horizontal equivalent at described intermediate gear (21) center, and vertically distance is 10.2 ± 5mm.
4. gear transmission of diesel engine as claimed in claim 1 is characterized in that, described intermediate gear (21) center is 8.7 ± 5mm with respect to the horizontal equivalent at described crankshaft gear (16) center, and vertically distance is 64.2 ± 5mm.
5. gear transmission of diesel engine as claimed in claim 1 is characterized in that, described oil pump gear (17) center is 22 ± 5mm with respect to the horizontal equivalent at described crankshaft gear (16) center, and vertically distance is 37 ± 5mm.
6. gear transmission of diesel engine as claimed in claim 1 is characterized in that, the velocity ratio between described crankshaft gear (16) and the described camshaft gear wheel (1) is 2: 1.
7. gear transmission of diesel engine as claimed in claim 1 is characterized in that, is provided with the valve timing mark between described camshaft gear wheel (1) and the described intermediate gear (21); Be provided with the injection timing mark between described fuel injection pump gear (20) and the described intermediate gear (21); Be provided with shared timing mark between described crankshaft gear (16) and the described intermediate gear (21).
8. as each described gear transmission of diesel engine of claim 1-7, it is characterized in that described camshaft gear wheel (1), crankshaft gear (16), fuel injection pump gear (20) are helical gear.
9. gear transmission of diesel engine as claimed in claim 8 is characterized in that, described crankshaft gear (16), camshaft gear wheel (1), fuel injection pump gear (20) are steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810186403A CN101749373A (en) | 2008-12-16 | 2008-12-16 | A kind of gear transmission of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810186403A CN101749373A (en) | 2008-12-16 | 2008-12-16 | A kind of gear transmission of diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN101749373A true CN101749373A (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810186403A Pending CN101749373A (en) | 2008-12-16 | 2008-12-16 | A kind of gear transmission of diesel engine |
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| Country | Link |
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| CN (1) | CN101749373A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047370A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Novel transmission mechanism for single-cylinder engine |
| CN103216329A (en) * | 2013-04-23 | 2013-07-24 | 中国船舶重工集团公司第七一一研究所 | Single cylinder engine testing device capable of changing cylinder diameter and travel |
-
2008
- 2008-12-16 CN CN200810186403A patent/CN101749373A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047370A (en) * | 2012-12-20 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Novel transmission mechanism for single-cylinder engine |
| CN103216329A (en) * | 2013-04-23 | 2013-07-24 | 中国船舶重工集团公司第七一一研究所 | Single cylinder engine testing device capable of changing cylinder diameter and travel |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100623 |