CN101303012A - Engine oil pump of internal combustion engine - Google Patents
Engine oil pump of internal combustion engine Download PDFInfo
- Publication number
- CN101303012A CN101303012A CNA2008101229192A CN200810122919A CN101303012A CN 101303012 A CN101303012 A CN 101303012A CN A2008101229192 A CNA2008101229192 A CN A2008101229192A CN 200810122919 A CN200810122919 A CN 200810122919A CN 101303012 A CN101303012 A CN 101303012A
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- pump
- pump cover
- cover
- combustion engine
- axle
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention relates to an oil pump of a combustion engine, which comprises a pump shell, an inner rotor, an outer rotor, a shaft and a pump cover, wherein, the inner rotor is positioned in the outer rotor and fixed on the shaft, certain eccentricity exists between the axial leads of the inner rotor and the outer rotor which are arranged inside the pump shell, the pump shell takes the shape of a concave disc, a flow distribution disc is arranged on the internal side of the pump cover which is embedded into and fixed at an opening of the pump shell, the surface of the pump cover is slightly higher than the end face of the pump shell, therefore, an installation boss is formed, the surface of the pump cover is provided with a groove and one end of the shaft supports in the central hole of the pump cover. The fuel pump is characterized in that the periphery of the surface of the pump cover is provided with a descending step which is lower than the surface of the pump cover and lower than the end face of the pump shell after the pump cover is installed; the spotface of the screw hole of the pump cover crosses the two sides of the installation boss and one side of the spotface is connected with the descending step and the other side thereof is connected with the groove on the end face of the pump cover. The fuel pump stops the oil leakage occurring in the oil pump of combustion engine with comparatively smaller installation and locating surface.
Description
Technical field
The present invention relates to a kind of engine oil pump of internal combustion engine, particularly the engine oil pump of internal combustion engine that uses in the single cylinder diesel lubrication system also is applicable to the oil pump of using in the lubrication system of machineries such as air compressor, sand mixer, lathe simultaneously.
Background technique
The engine oil pump of internal combustion engine of existing whole damascene structures, their structure is: engine oil pump of internal combustion engine comprises pump case, internal rotor, external rotor, axle and pump cover, internal rotor is positioned at external rotor and is fixed on the axle, certain throw of eccentric is arranged between the inside and outside rotor axis line and be contained in the pump case, pump case is the dish type of inner concavity, thrust plate is arranged on the inner side surface of pump cover, and pump cover embeds and be fixed on the pump case opening.As the patent No. is a kind of interior engagement cycloid gear pump of ZL00216717.4, and the patent No. is the embedded oil pump of ZL99230168.8, and the patent No. is the built-in embedded oil pump of pump cover of ZL99230124.6 etc.In this structure, the pump cover surface has just in time formed the positioning boss that oil pump is installed a little more than the pump case end face, and in actual use, we find have the construction bolt hole of minority pump that the oil impregnate phenomenon is arranged.For this reason, I have applied for that the patent No. is a kind of engine oil pump of internal combustion engine of ZL200410014460.6, this structure has a boss that matches and locate with internal combustion (IC) engine airframe at the opening end of pump case body, the pump cover surface is a little less than boss surface, the a small amount of oil that leaks out the assembling slit between pump cover and pump case just is not subjected to the obstruct of the surface of contact of pump case and internal combustion (IC) engine airframe, bearing outer ring formation like this, enter in the internal-combustion engine and take advantage of a situation, thoroughly stopped oil leakage phenomenon.Yet, this invention has only solved the oil impregnate problem of a class engine oil pump of internal combustion engine of the design and installation positioning boss of having ready conditions on the pump case body, but because of being subjected to the restriction of diesel engine structure, still have the less engine oil pump of internal combustion engine of part installing and locating face, positioning boss can not be changed on the pump case, can only be on pump cover, their oil impregnate problem equally also needs to solve.
Summary of the invention
The object of the present invention is to provide a kind of engine oil pump of internal combustion engine of stopping the less engine oil pump of internal combustion engine oil leakage phenomenon of installing and locating face.
Technical solution of the present invention is: engine oil pump of internal combustion engine comprises pump case, internal rotor, external rotor, axle and pump cover, internal rotor is positioned at external rotor and is fixed on the axle, in, certain throw of eccentric is arranged between the line of external rotor axle center and be contained in the pump case, pump case is the dish type of inner concavity, thrust plate is arranged on the inner side surface of pump cover, pump cover embeds and is fixed on the pump case opening, the pump cover surface is a little more than the pump case end face, form installation base, the pump cover surface is provided with groove, and an end bearing of axle is characterized in that in the center hole of pump cover: pump cover surface outer rim is provided with a decline step that is lower than the pump cover surface, after pump cover was installed, this decline step was lower than the pump case end face; Pump cover screw hole flake hole is across the installation base both sides, and one side links to each other with the decline step, and another side links to each other with pump cover end face groove.
The present invention is owing to be provided with a decline step that is lower than the pump cover surface in pump cover surface outer rim, and after pump cover is installed, this decline step is lower than the pump case end face, and therefore a small amount of oil that oozes out from pump cover and pump case assembly building slot just is collected in the formed groove of this decline step.Again because pump cover screw hole flake is cheated the both sides across the pump cover installation base, link to each other with the decline step on one side, another side links to each other with pump cover end face groove, therefore, the leakage of oil that is collected in the formed groove of decline step just enters pump cover end face groove along the flake hole, and then enter in the internal combustion (IC) engine airframe, participate in again in the lubrication system, stopped the generation of oil leakage phenomenon.
Description of drawings
The present invention is described in detail below in conjunction with accompanying drawing.
Fig. 1 is a plan view of the present invention.
Fig. 2 is the embodiment of the invention one an A-A cut-away view.
Fig. 3 is the embodiment of the invention two A-A cut-away views.
Among the figure: 1, pump case, 2, the decline step, 3, installation base, 4, pump cover screw hole flake hole, 5, groove, 6, axle, 7, pump cover, 8, internal rotor, 9, external rotor.
Embodiment
Embodiment one
A kind of engine oil pump of internal combustion engine comprises pump case 1, internal rotor 8, external rotor 9, axle 6 and pump cover 7, the flank profil of internal rotor 8 and external rotor 9 is a cycloid, internal rotor 8 is positioned at external rotor 9, internal rotor 8 by dowel fixes on axle 6, between internal rotor 8 and external rotor 9 shaft axiss certain throw of eccentric is arranged, internal rotor 8 and external rotor 9 are installed in the pump case 1.Pump case 1 is the dish type of inner concavity, and thrust plate is arranged on the inner side surface of pump cover 7, and pump cover 7 embeds and be fixed on the opening of pump case 1, and pump cover 7 surfaces form installation base 3 a little more than pump case 1 end face.Pump cover 7 surfaces are provided with groove 5, and pump cover 7 surperficial outer rims are provided with a decline step 2 that is lower than the pump cover surface, and after pump cover 7 was installed, this decline step 2 was lower than the end face of pump case 1.Pump cover screw hole flake hole 4 is across installation base 3 both sides, and one side links to each other with decline step 2, and another side links to each other with pump cover end face groove 5.One end bearing of axle 6 is in the center hole of pump cover 7, and the other end is bearing in the bottom surface axis hole of pump case 1.
Embodiment two
A kind of engine oil pump of internal combustion engine comprises pump case 1, internal rotor 8, external rotor 9, axle 6 and pump cover 7, internal rotor 8 is positioned at external rotor 9, internal rotor 8 on axle 6, has certain throw of eccentric between the shaft axis of internal rotor 8 and external rotor 9 by dowel fixes, and internal rotor 8 and external rotor 9 are installed in the pump case 1.Pump case 1 is the dish type of inner concavity, and thrust plate is arranged on the inner side surface of pump cover 7, and pump cover 7 embeds and be fixed on the opening of pump case 1, and pump cover 7 surfaces form installation base 3 a little more than pump case 1 end face.Pump cover 7 surfaces are provided with groove 5, and pump cover 7 surperficial outer rims are provided with a decline step 2 that is lower than the pump cover surface, and after pump cover 7 was installed, this decline step 2 was lower than the end face of pump case 1.Pump cover screw hole flake hole 4 is across installation base 3 both sides, and one side links to each other with decline step 2, and another side links to each other with pump cover end face groove 5.One end cantilever support of axle 6 is in the center hole of pump cover 7.
Claims (4)
1, engine oil pump of internal combustion engine, it comprises pump case, internal rotor, external rotor, axle and pump cover, internal rotor is positioned at external rotor and is fixed on the axle, in, certain throw of eccentric is arranged between the line of external rotor axle center and be contained in the pump case, pump case is the dish type of inner concavity, thrust plate is arranged on the inner side surface of pump cover, pump cover embeds and is fixed on the pump case opening, the pump cover surface forms installation base a little more than the pump case end face, and the pump cover surface is provided with groove, one end bearing of axle is in the center hole of pump cover, it is characterized in that: pump cover surface outer rim is provided with a decline step that is lower than the pump cover surface, and after pump cover was installed, this decline step was lower than the pump case end face; Pump cover screw hole flake hole is across the installation base both sides, and one side links to each other with the decline step, and another side links to each other with pump cover end face groove.
2, according to the described engine oil pump of internal combustion engine of claim 1, it is characterized in that: an end bearing of axle is in the center hole of pump cover, and the other end is bearing in the bottom surface axis hole of pump case.
3, according to the described engine oil pump of internal combustion engine of claim 1, it is characterized in that: an end cantilever support of axle is in the center hole of pump cover.
4, according to the described engine oil pump of internal combustion engine of claim 1, it is characterized in that: the flank profil of inside and outside rotor is a cycloid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101229192A CN101303012A (en) | 2008-07-02 | 2008-07-02 | Engine oil pump of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101229192A CN101303012A (en) | 2008-07-02 | 2008-07-02 | Engine oil pump of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101303012A true CN101303012A (en) | 2008-11-12 |
Family
ID=40113057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101229192A Pending CN101303012A (en) | 2008-07-02 | 2008-07-02 | Engine oil pump of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101303012A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003385A (en) * | 2010-11-27 | 2011-04-06 | 湖南机油泵股份有限公司 | Inner pump cover rotor oil pump installed on backside of pump cover |
| CN105156304A (en) * | 2015-10-23 | 2015-12-16 | 邹桂平 | Oil inlet end cover for compressor pump |
| CN105782689A (en) * | 2016-02-29 | 2016-07-20 | 无锡南理工科技发展有限公司 | Improved engine oil pump of internal combustion engine |
| CN110159390A (en) * | 2019-06-03 | 2019-08-23 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump that can reduce installation deformation |
-
2008
- 2008-07-02 CN CNA2008101229192A patent/CN101303012A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003385A (en) * | 2010-11-27 | 2011-04-06 | 湖南机油泵股份有限公司 | Inner pump cover rotor oil pump installed on backside of pump cover |
| CN105156304A (en) * | 2015-10-23 | 2015-12-16 | 邹桂平 | Oil inlet end cover for compressor pump |
| CN105782689A (en) * | 2016-02-29 | 2016-07-20 | 无锡南理工科技发展有限公司 | Improved engine oil pump of internal combustion engine |
| CN110159390A (en) * | 2019-06-03 | 2019-08-23 | 湖南机油泵股份有限公司 | A kind of lubricating oil pump that can reduce installation deformation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081112 |