CN202381323U - Cycloid pump for automatic transmission of car - Google Patents
Cycloid pump for automatic transmission of car Download PDFInfo
- Publication number
- CN202381323U CN202381323U CN2011204594782U CN201120459478U CN202381323U CN 202381323 U CN202381323 U CN 202381323U CN 2011204594782 U CN2011204594782 U CN 2011204594782U CN 201120459478 U CN201120459478 U CN 201120459478U CN 202381323 U CN202381323 U CN 202381323U
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- pump
- oil
- splined shaft
- automatic transmission
- rotor
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Abstract
The utility model relates to a cycloid pump, in particular to cycloid pump for an automatic transmission of a car, which solves the technical problems of the prior art that the casting process of a cycloid pump cast is complicated, the cycloid pump cast is difficult to machine, the pressure and the flow rate pulse of a gear pump is large, the volume efficiency of an oil pump is poor in low rotation speed and the like. The cycloid pump comprises a pump body (1) and a pump cover (2), and is characterized in that an outer rotor (3) is arranged inside the pump body (1), inside of the outer rotor is engaged with an inner rotor (4), a splined shaft (5) is arranged inside the inner rotor in a permeating way, the splined shaft (5) is arranged inside the pump cover (2), the splined shaft is split from the pump cover, an oil inlet (6), an oil outlet (7) and an oil return hole (8), an oil suction cavity (9) and an oil pressing cavity (10) are arranged inside a gap between the inner rotor and the outer rotor, and an oil sealing block (11) is arranged between the oil suction cavity and the oil pressing cavity.
Description
Technical field
The utility model relates to a kind of Gerotor pump, especially relates to a kind of car automatic transmission and uses Gerotor pump.
Background technique
Along with the development of China's car industry, travelling comfort and Economy become and pursue one's goal, the client to gear oil pump high rotating speed has been proposed, flow pulsation is little, pressure is steady, the high requirement of volumetric efficiency.The many dependence on import of high performance car automatic transmission fluid pump have become the critical component that restriction China automatic transmission domesticizes.Chinese patent discloses a kind of crescent gear pump with novel rotor set (notice of authorization number: CN 101120172A); It comprises the housing that defines rotor chamber; Housing comprises Working-fluid intaking and working fluid outlet, and each is communicated with a part of fluid of rotor chamber; The rotor set that can in rotor chamber, rotate, rotor set comprises: external rotor, it has the tooth that extends internally of first quantity; Internal rotor, it has the outward extending tooth of second quantity, and second quantity is lacked two than first quantity at least, and the internal rotor tooth has the compound flank profil of conjugation of outer rotor teeth; And crescent shape member; It is inserted between the inner and outer rotors of rotor set; And the sealing surfaces between rotor tooth is provided, to separate Working-fluid intaking and the working fluid outlet in the rotor chamber, wherein; Each outer rotor teeth has compound flank profil, and compound flank profil is included in that tooth root place near tooth forms the part of circular arc and in the part that forms the hypocycloid arc near the tooth top place of tooth; Each tooth top all has a width, and each tooth root all has a width, and the ratio of the width of the width of tooth root and tooth top is selected as the leakage that reduces to pass tooth top; The modulus of rotor set equals the throw of eccentric of rotor set, the Pitch radius of external rotor equal throw of eccentric half multiply by first quantity, the Pitch radius of internal rotor equal throw of eccentric half multiply by second quantity; The combination flank profil has the continuous transition part between circular arc and hypocycloid arc, internal rotor has the Fillet between the tooth that extends internal rotor.But this Gerotor pump cast casting complex process is difficult to processing, and the pressure and the flow pulsation of gear pump are big, and particularly during the slow-speed of revolution, the oil pump volumetric efficiency is relatively poor.
The model utility content
The utility model provides a kind of car automatic transmission and uses Gerotor pump; It mainly is to solve existing in prior technology Gerotor pump cast casting complex process, is difficult to processing, and the pressure and the flow pulsation of gear pump are big; Particularly during the slow-speed of revolution, the technical problem of the relatively poor grade of oil pump volumetric efficiency.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals:
The car automatic transmission of the utility model is used Gerotor pump, comprises the pump housing and pump cover, is provided with external rotor in the described pump housing; Be engaged with internal rotor in the external rotor, cross-under has splined shaft in the internal rotor, and splined shaft is located at pump cover inside; And splined shaft and pump cover are for being separately made; Be provided with filler opening, oil outlet, spill port in the pump housing, the gap location between internal rotor and the external rotor is provided with oil sucting cavity, pumping cavity, is provided with the oil sealing piece between oil sucting cavity and the pumping cavity.The tooth root portion of splined shaft upper spline and the monolateral only 2mm of the wall thickness between the endoporus when if splined shaft and pump cover are one, when its material is the spheroidal graphite body of casting or the grey body of casting, are difficult to guarantee its intensity.When splined shaft and pump cover are adopted two body structures, splined shaft adopts the 40Cr material, the whole hardening and tempering process that adopts.Adopt surface high frequency to quench at the spline place, make its surface hardening, guarantee the intensity of part.If traditional integral structure, its casting technique is complicated, and the casting difficulty is big, and the useless rate of material is high.Endoporus place at the inner plane and the splined shaft of pump cover very easily produces pore.After split type, pump cover adopts the HT250 casting, and its casting difficulty reduces greatly, and the useless rate of material reduces.
As preferably, it is the leg-of-mutton groove that press-fits that the cylindrical of described splined shaft has section.On splined shaft, adopt the method for rolling cut, being cut into 96 places cylindrical wide is 0.7 the groove that press-fits, and adopts surface high frequency heat treatment, improves hardness.When splined shaft cylindrical and pump cover endoporus interference fit press-fit,, press-fit fully and be one in the unnecessary wall thickness excision on of 96 place's grooves on the splined shaft with the pump cover endoporus.Guaranteed the integrity problem after splined shaft and pump cover press-fit the formula of being integral.
As preferably, the inside at described splined shaft two ends all is provided with bearing.
As preferably, be provided with outside framework oil seal between described pump housing exterior edge face and the splined shaft, the end face of splined shaft is provided with cover plate.Outside framework oil seal can prevent that the oil pump internal drainage from draining into the oil pump outside.
As preferably, described filler opening, oil outlet are double-face.Oil inlet and outlet adopts the method for comparatively complicated double-face turnover oil during this oil pump design, makes the pressure balance of gear pair two sides, and reliability is higher, and the life-span is longer.
Therefore, the utility model adopts two body structures with splined shaft and pump cover, makes the casting difficulty reduce greatly; The useless rate of material reduces, and utilizes and press-fit groove, and it is comparatively reliable to have guaranteed that splined shaft and pump cover press-fit after the formula of being integral; Oil inlet and outlet adopts the method for comparatively complicated double-face turnover oil during the oil pump design, makes the pressure balance of gear pair two sides, and reliability is higher; Life-span is longer, and is simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model;
Accompanying drawing 2 is a kind of structural representations of splined shaft;
Accompanying drawing 3 is A-A cross-sectional view of Fig. 2;
Accompanying drawing 4 is the utility model internal oil passages and each active chamber schematic representation.
Component, position and numbering among the figure: the pump housing 1, pump cover 2, external rotor 3, internal rotor 4, splined shaft 5, filler opening 6, oil outlet 7, spill port 8, oil sucting cavity 9, pumping cavity 10, oil sealing piece 11, press-fit groove 12, bearing 13, outside framework oil seal 14, cover plate 15.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technological scheme of the utility model.
Embodiment: this routine car automatic transmission is used Gerotor pump, like Fig. 1, comprises the pump housing 1 and pump cover 2, is provided with external rotor 3 in the pump housing, is engaged with internal rotor 4 in the external rotor, and cross-under has splined shaft 5 in the internal rotor, and the inside at splined shaft two ends all is provided with bearing 13.Like Fig. 2, like Fig. 3, it is the leg-of-mutton groove 12 that press-fits that the cylindrical of splined shaft has section.Splined shaft is located at pump cover 2 inside, and splined shaft and pump cover be provided with outside framework oil seal 14 for being separately made between pump housing exterior edge face and the splined shaft 5, and the end face of splined shaft is provided with cover plate 15.Like Fig. 4, be provided with filler opening 6, oil outlet 7, spill port 8 in the pump housing, filler opening, oil outlet are double-face.Gap location between internal rotor and the external rotor is provided with oil sucting cavity 9, pumping cavity 10, is provided with oil sealing piece 11 between oil sucting cavity and the pumping cavity.
During use; When the power source of motor drives internal rotor 4 rotations through live axle; The external rotor 3 that matches is with its engagement and do equidirectional rotation, and the gear teeth that at this moment meshing in the oil sucting cavity 9 are thrown off gradually and increased sealed volume, form parital vacuum; Fluid gets into oil sucting cavity 9 through fuel sucking pipe under the effect of atmospheric pressure; The gear teeth mesh in succession, when the gear teeth get into pumping cavity, nibble the volume reducing of wheel between cog mutually, and the fluid that brings to pumping cavity 10 from oil sucting cavity gets into the hydraulic system of car automatic transmission case through oil outlet tube outside oil outlet is forced out pump.
The above is merely the specific embodiment of the utility model; But the structure characteristic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (5)
1. a car automatic transmission is used Gerotor pump; Comprise the pump housing (1) and pump cover (2), it is characterized in that being provided with external rotor (3) in the described pump housing (1), be engaged with internal rotor (4) in the external rotor; Cross-under has splined shaft (5) in the internal rotor; Splined shaft is located at pump cover (2) inside, and splined shaft and pump cover are provided with filler opening (6), oil outlet (7), spill port (8) for being separately made in the pump housing; Gap location between internal rotor and the external rotor is provided with oil sucting cavity (9), pumping cavity (10), is provided with oil sealing piece (11) between oil sucting cavity and the pumping cavity.
2. car automatic transmission according to claim 1 is used Gerotor pump, and it is the leg-of-mutton groove (12) that press-fits that the cylindrical that it is characterized in that described splined shaft (5) has section.
3. car automatic transmission according to claim 1 and 2 is used Gerotor pump, it is characterized in that the inside at described splined shaft (5) two ends all is provided with bearing (13).
4. car automatic transmission according to claim 1 and 2 is used Gerotor pump, it is characterized in that being provided with outside framework oil seal (14) between the described pump housing (1) exterior edge face and the splined shaft (5), and the end face of splined shaft is provided with cover plate (15).
5. car automatic transmission according to claim 1 and 2 is used Gerotor pump, it is characterized in that described filler opening (6), oil outlet (7) are double-face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204594782U CN202381323U (en) | 2011-11-18 | 2011-11-18 | Cycloid pump for automatic transmission of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204594782U CN202381323U (en) | 2011-11-18 | 2011-11-18 | Cycloid pump for automatic transmission of car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381323U true CN202381323U (en) | 2012-08-15 |
Family
ID=46629829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204594782U Expired - Fee Related CN202381323U (en) | 2011-11-18 | 2011-11-18 | Cycloid pump for automatic transmission of car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381323U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926994A (en) * | 2012-11-28 | 2013-02-13 | 无锡威孚精密机械制造有限责任公司 | Oil-supplementing pump with anti-friction coating layers |
| CN103527469A (en) * | 2013-11-05 | 2014-01-22 | 宁夏新航能源环境科技有限公司 | Energy-saving pump body |
| CN109113989A (en) * | 2017-06-22 | 2019-01-01 | 江阴华欧德汽车动力系统研发有限公司 | Gear box oil pump and gearbox with sealing structure |
| CN111637059A (en) * | 2020-06-11 | 2020-09-08 | 含山县大力精密机械有限公司 | Compressor rotor installation guiding device and method |
-
2011
- 2011-11-18 CN CN2011204594782U patent/CN202381323U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926994A (en) * | 2012-11-28 | 2013-02-13 | 无锡威孚精密机械制造有限责任公司 | Oil-supplementing pump with anti-friction coating layers |
| CN102926994B (en) * | 2012-11-28 | 2015-09-16 | 无锡威孚精密机械制造有限责任公司 | There is the slippage pump of ware reducing coating layer |
| CN103527469A (en) * | 2013-11-05 | 2014-01-22 | 宁夏新航能源环境科技有限公司 | Energy-saving pump body |
| CN109113989A (en) * | 2017-06-22 | 2019-01-01 | 江阴华欧德汽车动力系统研发有限公司 | Gear box oil pump and gearbox with sealing structure |
| CN111637059A (en) * | 2020-06-11 | 2020-09-08 | 含山县大力精密机械有限公司 | Compressor rotor installation guiding device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20120815 Termination date: 20201118 |