CN2535578Y - Cycloid type autombile fuel-oil pump core - Google Patents
Cycloid type autombile fuel-oil pump core Download PDFInfo
- Publication number
- CN2535578Y CN2535578Y CN 02208980 CN02208980U CN2535578Y CN 2535578 Y CN2535578 Y CN 2535578Y CN 02208980 CN02208980 CN 02208980 CN 02208980 U CN02208980 U CN 02208980U CN 2535578 Y CN2535578 Y CN 2535578Y
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- CN
- China
- Prior art keywords
- gear
- cycloid
- pinwheel
- pump core
- cycloid wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A cycloid-type vehicle fuel pump core is characterized in that the pump core comprises an outer sleeve (4), a pump shell (1), a pin gear (2) and a cycloid gear (3), wherein the pin gear (2) is a concave gear, the cycloid gear (3) is a convex gear, the convex gear tooth crest of the cycloid gear (3) engages with the concave gear tooth root of the pin gear (2), the back lash forms a sealed chamber (8) in an oil distribution casing between an upper cover (5) and a lower cover (6). The utility model effectively overcomes the phenomena of easily damaged structure and insufficient pressure caused by short service life. The cycloid-type vehicle fuel pump core produced according to the scheme of the utility model surely will bring positive application effects and obvious economic benefits to the normal oil pumping of vehicle fuel pumps.
Description
Technical field: the invention of the automobile fuel pump core that the utility model relates to, particularly be a kind of improvement invention of cycloid formula automobile fuel pump core.
Background technique: in the prior art, the automobile fuel pump core all adopts plate blade formula electric fuel punp core, and the rotor of this pump core is a circular flat board, and has sulculus on circumference, forms pump oil blade.Oil pump in the running, the fuel oil in the rotor circumference sulculus is followed together high speed rotating of rotor, because action of centrifugal force increases the oil pressure at fuel outlet place, forms certain vacuum in inlet simultaneously, thus make fuel oil from import be inhaled into and by pump to outlet.Because the impeller of this kind electric fuel punp is to be made of plastics, its intensity and serviceability are relatively poor, can cause the phenomenon of oil pressure deficiency after permanent the use.
Summary of the invention: in view of the problem that known technology exists, the purpose of this utility model aims to provide a kind of simple in structure, and is reasonable in design, operates steadily, and helps environmental protection and the energy-conservation and a kind of cycloid formula automobile fuel pump core Safety performance brilliance.For achieving the above object, the utility model is finished as follows: this kind cycloid formula automobile fuel pump core, it is characterized in that the pump core is by overcoat, pump case, pinwheel and cycloid wheel are formed, described pinwheel is a concave gear, described cycloid wheel is a convex gear, described pump case, pinwheel and cycloid wheel are located between loam cake and the lower cover, described pinwheel is located in the pump case, described cycloid wheel is located in the pinwheel, the tooth paddy of the convex gear tooth top of described cycloid wheel and the concave gear of pinwheel partly meshes, do not form Seal cage in the oil distribution casing of Nie He gap between loam cake and lower cover, be provided with axle sleeve in the described lower cover, described loam cake, pump case and lower cover are fixed in the overcoat by same fixed block, and the interior circle of described pump case is an eccentric circle.The utility model compared with prior art, it is fragile effectively to have overcome structure, working life the short phenomenon that causes underpressure, according to the cycloid formula automobile fuel pump core of the utility model design motif made, bring positive using effect and tangible economic benefit will for the normal pump oil of automobile fuel pump.
Description of drawings: the utility model has following accompanying drawing:
Fig. 1 is an overall structure schematic representation of the present utility model;
Fig. 2 is the sectional view of Fig. 1 of the present utility model along A-A.
Specific embodiment: accompanying drawing has been represented structure of the present utility model and embodiment, further describes the relevant details and the working principle of embodiment below more in conjunction with the accompanying drawings.This cycloid formula automobile fuel pump core is made up of overcoat 4, pump case 1, pinwheel 2 and cycloid wheel 3, and described pinwheel 2 is the external rotor concave gear, and described cycloid wheel 3 is the internal rotor convex gear.Described pump case 1, pinwheel 2 and cycloid wheel 3 are located between loam cake 5 and the lower cover 6, described pinwheel 2 is located in the pump case 1, described cycloid wheel 3 is located in the pinwheel 2, the tooth paddy of the convex gear tooth top of described cycloid wheel 3 and the concave gear of pinwheel 2 partly meshes, do not form Seal cage 8 in the oil distribution casing of Nie He gap between loam cake 5 and lower cover 6, be provided with axle sleeve 7 in the described lower cover 6, the outer round surface of described axle sleeve 7 contacts with the internal circular surfaces of cycloid wheel 3.Described pinwheel 2, cycloid wheel 3 and pump case 1 are made by metallic material.Described loam cake 5, pump case 1 and lower cover 6 are fixed in the overcoat 4 jointly by fixed block 9, and the interior circle of described pump case 1 is an eccentric circle.Be equipped with oil through on described loam cake 5 and the lower cover 6, the double wedge number of teeth of the described cycloid wheel 3 of present embodiment is nine teeth.The recessed tooth number of teeth of described pinwheel 2 is ten teeth.Because inner and outer rotors is multiple tooth engagement, this has just formed some sealed volume, when the utility model is worked, the electric machine main shaft that is located in the electric fuel punp drives cycloid wheel 3 rotations, simultaneously because the gear meshing effect, cycloid wheel 3 drives pinwheel 2 and does motion in the same way, at this moment, because the sealed volume that forms between the tooth top of cycloid wheel 3 and the tooth paddy of pinwheel 2, along with the rotation of gear, sealed volume just enlarges gradually, so just formed parital vacuum, fuel oil is inhaled into Seal cage 8 from the oil through (not shown), and to Seal cage volume maximum, oil suction at this moment finishes.When gear remains in operation, be full of fuel oil sealed volume 8 just reduce gradually, discharge from another oil through (not shown) again after fuel oil is squeezed, when the part tooth top of the cycloid wheel 3 at place, finally sealed chamber and the part tooth paddy of pinwheel 2 all mesh, press oil to finish.Cycloid wheel 3 whenever circles, and the Seal cage 8 that is constituted between the tooth paddy by the tooth top of cycloid wheel 3 and pinwheel 2 is finished suction, oil extraction once, when cycloid wheel 3 is rotated continuously, has promptly finished the suction of fuel pump, the overall process of oil extraction work.
Claims (1)
1, a kind of cycloid formula automobile fuel pump core, it is characterized in that the pump core is by overcoat (4), pump case (1), pinwheel (2) and cycloid wheel (3) are formed, described pinwheel (2) is a concave gear, described cycloid wheel (3) is a convex gear, described pump case (1), pinwheel (2) and cycloid wheel (3) are located between loam cake (5) and the lower cover (6), described pinwheel (2) is located in the pump case (1), described cycloid wheel (3) is located in the pinwheel (2), the tooth paddy of the concave gear of the convex gear tooth top of described cycloid wheel (3) and pinwheel (2) partly meshes, do not form Seal cage (8) in the oil distribution casing of Nie He gap between loam cake (5) and lower cover (6), be provided with axle sleeve (7) in the described lower cover (6), described loam cake (5), pump case (1) and lower cover (6) are fixed in the overcoat (4) by same fixed block (9), and the interior circle of described pump case (1) is an eccentric circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02208980 CN2535578Y (en) | 2002-04-15 | 2002-04-15 | Cycloid type autombile fuel-oil pump core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02208980 CN2535578Y (en) | 2002-04-15 | 2002-04-15 | Cycloid type autombile fuel-oil pump core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2535578Y true CN2535578Y (en) | 2003-02-12 |
Family
ID=33689519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02208980 Expired - Fee Related CN2535578Y (en) | 2002-04-15 | 2002-04-15 | Cycloid type autombile fuel-oil pump core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2535578Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382135B (en) * | 2007-09-05 | 2012-10-10 | J.C.班福德挖掘机有限公司 | Pumping device |
| CN102953981A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Oil pump rotor |
-
2002
- 2002-04-15 CN CN 02208980 patent/CN2535578Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382135B (en) * | 2007-09-05 | 2012-10-10 | J.C.班福德挖掘机有限公司 | Pumping device |
| CN102953981A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Oil pump rotor |
| CN102953981B (en) * | 2012-11-22 | 2016-03-30 | 江苏高博智融科技有限公司 | Oil hydraulic-pump rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |