CN203321723U - Transmission mechanism of high pressure fuel pump - Google Patents
Transmission mechanism of high pressure fuel pump Download PDFInfo
- Publication number
- CN203321723U CN203321723U CN2013203032537U CN201320303253U CN203321723U CN 203321723 U CN203321723 U CN 203321723U CN 2013203032537 U CN2013203032537 U CN 2013203032537U CN 201320303253 U CN201320303253 U CN 201320303253U CN 203321723 U CN203321723 U CN 203321723U
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- China
- Prior art keywords
- live axle
- cross
- fuel pump
- high pressure
- transmission mechanism
- Prior art date
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- Expired - Fee Related
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- 239000000446 fuel Substances 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 title claims abstract description 15
- 230000000694 effects Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000010710 diesel engine oil Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses a transmission mechanism of a high pressure fuel pump. The transmission mechanism of the high pressure fuel pump comprises a driving shaft, a bevel wheel, a cross-shaped connecting block, a driving shaft mounting flange and a double-row-angle contacting bearing. The cross-shaped connecting block is fixedly connected to a pump shaft of the fuel pump, the bevel wheel is mounted at one end of the driving shaft, a cross-shaped nest is arranged in the other end of the driving shaft, the cross-shaped nest is matched with the cross-shaped connecting block, the driving shaft and the double-row-angle contacting bearing are in interference fit, and the double-row-angle contacting bearing and a shaft hole of the driving shaft mounting flange are in interference fit. The transmission mechanism of the high pressure fuel pump is simple in structure, and capable of completely performing the noise lowering effect of the bevel wheel and better bearing the axial force of the bevel wheel.
Description
Technical field
The utility model relates to engine art, is specifically related to a kind of fuel pump driving mechanism driven by helical gear.
Background technique
Motor is widely used in various technical fields, especially automotive field.Along with the increasingly stringent of domestic and international Abgasgesetz, high-pressure common-rail fuel system is widely used on vehicle diesel engine.High pressure fuel pump is by timing system gear or chain wheel drive.In recent years, in order effectively to reduce the noise of motor, occurred changing the timing system of motor into trend that helical gear drives by original spur gear, for example, at application number: in the Chinese invention patent application that 201210078678.2, the applying date: 2012-03-22, denomination of invention are " diesel engine oil pump drive system ", just adopted helical gear in timing system.
Because the pump shaft of fuel pump generally can not bear axial force, therefore need to be offseted or be compensated the axial force produced in transmission process.At application number: in the Chinese invention patent that 200810107974.4, the applying date: 2008-05-06, denomination of invention are " a kind of high voltage oil fuel pump transmission mechanism ", pass through the crosshead shoe transmission between the pump shaft of live axle and fuel pump, thereby eliminated the impact of axial force and the normal force of timing wheel train, improved the relative displacement compensation ability between transmission shaft and pump shaft, and linkage structure is simple.But, if timing system adopts helical gear words, with respect to spur gear, the suffered axial thrust load of helical gear is larger, therefore elimination, the bit shift compensation of axial force are become in design to the matter of utmost importance that needs consideration, if and still adopt crosshead shoe to connect, when high engine speeds running, decelerate, axial force changes more frequent, therefore the axial movement value of crosshead shoe between pump shaft and live axle is more frequent more greatly, not only more easily wear and tear and shorten the life-span, and can offset helical gear noise reduction.
At application number: in the Chinese utility model patent application that 201320132440.3, the applying date: 2013-03-22, denomination of invention are " a kind of high pressure fuel pump transmission mechanism ", the inventor utilizes the cross nest of live axle to coordinate axial displacement is compensated with cross contiguous block on being assemblied in pump shaft, utilizes two thrust plates to carry out the partial offset axial force simultaneously.But, because general thrust plate also will play the effect of regulating axial internal clearance, so the optional leeway of the thickness of thrust plate is very little, often occurs that thrust plate crosses thin and offset the weak situation of axial force ability, and axial force is larger when adopting Helical gear Transmission, easily cause the thrust plate distortion.And, on the fitting surface of live axle and live axle mounting flange, need the design oil leab to provide lubricated, this has just increased structural complexity.
The model utility content
It is better and can bear better the high pressure fuel pump transmission mechanism of axial force that the purpose of this utility model is to provide a kind of simple in structure, noise reduction.
For achieving the above object, the utility model provides following technological scheme:
A kind of high pressure fuel pump transmission mechanism, comprising: live axle; Helical gear; The cross contiguous block; The live axle mounting flange; The biserial angular contact bearing; Described cross contiguous block is fixedly connected on the pump shaft of described fuel pump, described helical gear is arranged on an end of described live axle, the other end of described live axle has the cross nest, described cross nest coordinates with described cross contiguous block, described live axle and described biserial angular contact bearing interference fit, the axis hole interference fit of described biserial angular contact bearing and described live axle mounting flange.
Preferably, there is further the recess formed along the axial depression of described live axle in described cross nest.
Preferably, described helical gear is fixedly set on described live axle.
The utility model has been cancelled crosshead shoe, and makes directly to process the cross nest on live axle, and the cross contiguous block coordinates with the cross nest, makes live axle direct-driven pump axle, and structure is simpler.And, under the condition of using helical gear to drive, the cross contiguous block can compensate axial displacement with coordinating still of cross nest when transmitting torsional moment, solved the counteracting that adopts axial force under the helical gear condition, the subject matter of axial displacement compensation, avoided the play of crosshead shoe to produce noise simultaneously, therefore helical gear noise reduction advantage has obtained embodying more fully, simultaneously, live axle is installed on the live axle mounting flange by the biserial angular contact bearing, fit system is interference fit, born the effect of offsetting axial force by the biserial angular contact bearing, therefore no longer need thrust plate to offset axial force, structure is simpler, needn't consider the problem on deformation of thrust plate.
Further, the recess in the cross nest can hold the spindle nose of pump shaft.
Further, helical gear is fixedly set on live axle, simple in structure.
The accompanying drawing explanation
Next in connection with accompanying drawing, specific embodiment of the utility model is described in further detail, wherein:
Fig. 1 is the partial isometric of the embodiment's of the present utility model fuel pump that the cross contiguous block is installed;
Fig. 2 is the axonometric drawing of embodiment's of the present utility model live axle;
Fig. 3 is the left view of the live axle in Fig. 2;
Fig. 4 is that the master of embodiment's of the present utility model high pressure fuel pump transmission mechanism looks sectional view.
Mark in figure: fuel pump 10, cross contiguous block 11, pump shaft 12, live axle 20, cross nest 21, recess 22, cylinder body 30, live axle mounting flange 40, axis hole 41, helical gear 50, biserial angular contact bearing 60, pad 70, nut 80.
Embodiment
With reference to figure 1, cross contiguous block 11 is fixedly connected on the pump shaft 12 of fuel pump 10.Generally, pump shaft 12 can not bear axial force.
In conjunction with Fig. 2, Fig. 3, an end of live axle 20 has cross nest 21, and the shape of the shape of cross nest 21 and cross contiguous block 11 is complementary, and makes cross contiguous block 11 can do axial motion by relative drive shaft 20 by transmitting torque in cross nest 21 simultaneously.In cross nest 21, also there is further the recess 22 be recessed to form along the axial direction of live axle 20, recess 22 installs for holding the part that cross contiguous block 11 rear pump shafts 12 still expose, and makes the rotation of pump shaft 12 more smooth-going.
With reference to figure 4, live axle mounting flange 40 is fixed on cylinder body 30, live axle 20 and biserial angular contact bearing 60 interference fit, and axis hole 41 interference fit of biserial angular contact bearing 60 and live axle mounting flange 40, thus live axle 20 can be rotated.The end that live axle 20 has cross nest 21 coordinates with cross contiguous block 11, and the other end is by the fixing suit of the mode helical gear 50 of interference fit and by pad 70 and nut 80 lockings.Certainly, those of ordinary skills can imagine at an easy rate, and mode that can also be suitable by other is installed to helical gear 50 on live axle 20.The axial force that live axle 20 bears in the process that drives pump shaft 12 to rotate, major part is offset by biserial angular contact bearing 60, even and the axial displacement that biserial angular contact bearing 60 produces due to reasons such as machining accuracies, and the sub-fraction axial force can by the axial displacement between live axle 20 and pump shaft 12 compensation be offset, so pump shaft 12 is in the axial direction and do not stress.Even therefore do not have thrust plate, this driving mechanism still can bear axial force well.
Although the utility model is described in conjunction with above embodiment, the utility model is not defined to above-described embodiment, and only is subject to the restriction of claim.Those of ordinary skills can easily carry out equivalence to it and replace and modification, but do not leave essence design of the present utility model and scope.
Claims (3)
1. a high pressure fuel pump transmission mechanism comprises:
Live axle;
Helical gear;
The cross contiguous block;
The live axle mounting flange;
The biserial angular contact bearing;
Described cross contiguous block is fixedly connected on the pump shaft of described fuel pump, described helical gear is arranged on an end of described live axle, the other end of described live axle has the cross nest, described cross nest coordinates with described cross contiguous block, it is characterized in that, described live axle and described biserial angular contact bearing interference fit, the axis hole interference fit of described biserial angular contact bearing and described live axle mounting flange.
2. high pressure fuel pump transmission mechanism according to claim 1, is characterized in that, has further the recess formed along the axial depression of described live axle in described cross nest.
3. high pressure fuel pump transmission mechanism according to claim 1, is characterized in that, described helical gear is fixedly set on described live axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203032537U CN203321723U (en) | 2013-05-29 | 2013-05-29 | Transmission mechanism of high pressure fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203032537U CN203321723U (en) | 2013-05-29 | 2013-05-29 | Transmission mechanism of high pressure fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203321723U true CN203321723U (en) | 2013-12-04 |
Family
ID=49661081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203032537U Expired - Fee Related CN203321723U (en) | 2013-05-29 | 2013-05-29 | Transmission mechanism of high pressure fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203321723U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514135A (en) * | 2016-08-30 | 2017-03-22 | 济宁勤昌工贸有限公司 | Component of novel shaft hole connection mode and manufacturing method of component |
-
2013
- 2013-05-29 CN CN2013203032537U patent/CN203321723U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514135A (en) * | 2016-08-30 | 2017-03-22 | 济宁勤昌工贸有限公司 | Component of novel shaft hole connection mode and manufacturing method of component |
| CN106514135B (en) * | 2016-08-30 | 2020-01-07 | 济宁勤昌工贸有限公司 | Component with novel shaft hole connection mode and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
|
| 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: 20131204 Termination date: 20190529 |