CN201351601Y - Cycloidal pump used for automatic speed changer of car - Google Patents
Cycloidal pump used for automatic speed changer of car Download PDFInfo
- Publication number
- CN201351601Y CN201351601Y CNU2009203008512U CN200920300851U CN201351601Y CN 201351601 Y CN201351601 Y CN 201351601Y CN U2009203008512 U CNU2009203008512 U CN U2009203008512U CN 200920300851 U CN200920300851 U CN 200920300851U CN 201351601 Y CN201351601 Y CN 201351601Y
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- Prior art keywords
- oil
- rotor
- pump
- tooth
- cycloidal
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Abstract
The utility model relates to a cycloidal pump, in particular to a cycloidal pump used for an automatic speed changer of a car. The cycloidal pump mainly solves the problems that in the prior art, the designed oil passage is small and complex and is difficult to process and also solves the technical problems that the pressure and flow pulsation of a gear pump are large, and especially when rotating speed is low, the volume efficiency of an oil pump is poor, and the like. The cycloidal pump comprises a pump body; the two ends of the pump body are respectively connected with a front cover and a rear cover; the pump body is internally provided with an outer rotor, the inner part of the outer rotor is meshed with an inner rotor; the inner rotor and the outer rotor are arranged in an excentric mode; an oil-sealing block is arranged between the inner rotor and the outer rotor and divides a hollow cavity formed by the inner rotor and the outer rotor into an oil-pressing cavity and an oil-absorbing cavity; the pump body is provided with an oil inlet and the front cover is provided with an oil outlet; one tooth profile line of a tooth body of the outer rotor and another tooth profile line of an adjacent tooth body are distributed on an arc of a same circle; and a tooth body of the inner rotor is a cycloidal tooth shape which is conjugate with tooth phase of the arc of the outer rotor.
Description
Technical field
The utility model relates to a kind of Gerotor pump, especially relates to a kind of to the isostructural improvement of Gerotor pump of car automatic transmission
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, maximum speed requires to reach 6000r/min.The many dependence on import of high performance car automatic transmission fluid pump have become the critical component that restriction China automatic transmission domesticizes.In the past, interior engagement cycloidal gear oil pump, the disome formula structures of forming by the pump housing and end cap that adopt more.The cycloidal gear oil pump is designed to external rotor more and Duos 1 tooth than internal rotor, and the number of teeth is little.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 provide the sealing surfaces between rotor tooth, 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 reducing to pass the leakage of 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 the pressure and the flow pulsation of this gear pump are big, and particularly when rotating speed was low, the oil pump volumetric efficiency was poor.
The model utility content
The utility model technical issues that need to address provide a kind of car automatic transmission Gerotor pump, and it mainly is that to solve the oil duct of existing in prior technology design little and complicated, the problem that is difficult to process; Pressure and flow pulsation that the utility model has also solved gear pump are big, particularly when rotating speed is low, and the technical problem of oil pump volumetric efficiency difference etc.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
Car automatic transmission Gerotor pump of the present utility model, comprise the pump housing, pump housing two ends are connected with protecgulum and bonnet respectively, it is characterized in that being provided with external rotor in the described pump housing, external rotor inside is engaged with the internal rotor that can wear live axle, and internal rotor and external rotor are the decentraction setting; Be provided with the oil sealing piece between described internal rotor and the external rotor, the oil sealing piece is divided into pumping cavity and oil sucting cavity with the cavity that forms between the inside and outside rotor; Have the filler opening that can be communicated with on the described pump housing, have the oil outlet that can be communicated with on the protecgulum with oil sucting cavity with pumping cavity; A wherein flank profil line of described external rotor denticle and another flank profil line of adjacent denticle are distributed on the circular arc of same circle, and the denticle of internal rotor is the cycloidal tooth profile with external rotor round-arced tooth phase conjugate.The utility model adopts trisome formula structure, is convenient to the processing of the pump housing and end cap and the realization of complicated oil circuit.The gear pair that internal rotor and external rotor are formed is placed in the middle of the pump housing, forms 2 sealing cavity volumes by protecgulum, the pump housing, bonnet and inner and outer rotors pair, has designed protruding oil sealing piece on protecgulum, thereby being separated into oil sucting cavity and pumping cavity between the inner and outer rotors pair.
As preferably, the number of teeth of described internal rotor is 8～10, many 2 of the gear ratio internal rotor of external rotor.The secondary design of inner and outer rotors can be adopted the two teeth difference cycloid rotor, and promptly external rotor Duo 2 teeth than internal rotor, and the profile of tooth with external rotor of 11 teeth adopts circular arc, and internal rotor adopts and the cycloidal tooth profile of external rotor round-arced tooth phase conjugate.In the secondary rotary course of rotor, realize the suction functional oil of oil pump by the volume-variation of a plurality of cells between the inside and outside rotor flank of tooth of circular arc-conjugate curve formation.
As preferably, have the oil road that is communicated with pumping cavity and oil outlet on the described pump housing, oil road is semi-circular.Can be provided with the oil duct that adapts with the oil road shape on the bonnet.
As preferably, described protecgulum, bonnet inside all are provided with bearing, are convenient to cross-under live axle such as splined shaft transmission in it.
As preferably, described filler opening is located at the side of the pump housing, and oil outlet is located at the upper-end surface of protecgulum.Filler opening can design according to client's different requirements with oil outlet.
Therefore, the utlity model has and adopt trisome formula structure, be convenient to the processing of the pump housing and end cap and the realization of complicated oil circuit, characteristics such as the volumetric efficiency of oil pump is better, and is simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 is A-A cross-sectional view of Fig. 1;
Accompanying drawing 3 is structural representations of the utility model protecgulum;
Accompanying drawing 5 is structural representations of the utility model pump housing;
Accompanying drawing 6 is C-C cross-sectional view of Fig. 5;
Accompanying drawing 7 is structural representations of the utility model bonnet;
Accompanying drawing 8 is D-D cross-sectional view of Fig. 7.
Component, position and numbering among the figure: the pump housing 1, protecgulum 2, bonnet 3, external rotor 4, flank profil line 4-1,4-2, internal rotor 5, oil sealing piece 6, pumping cavity 7, oil sucting cavity 8, filler opening 9, oil outlet 10, oil road 11, bearing 12.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the car automatic transmission Gerotor pump that this is routine, as Fig. 1, Fig. 2, the pump housing 1 is between protecgulum 2 and bonnet 3, the inner and outer rotors pair that internal rotor 5 and external rotor 4 are formed is placed in the enclosed space that is surrounded by the pump housing 1, protecgulum 2 and bonnet 3, and internal rotor 5 and external rotor 4 are eccentric mutually to be provided with.Protecgulum 2, bonnet 3 inside all are provided with bearing 12.But protecgulum 2, bonnet 3, internal rotor 5 inside cross-under splined shafts.The inner and outer rotors pair has adopted the two teeth difference cycloid rotor, be that external rotor 4 is than more than 52 teeth of internal rotor, profile of tooth with external rotor 4 of 11 teeth adopts circular arc, and a wherein flank profil line 41 of external rotor 4 denticles and another flank profil line 42 of adjacent denticle are distributed on the circular arc of same circle.Internal rotor 5 adopts the cycloidal tooth profile with external rotor 4 round-arced tooth phase conjugates.As Fig. 3, Fig. 4, be provided with oil sealing piece 6 between internal rotor 5 and the external rotor 4, the oil sealing piece is divided into pumping cavity 7 and oil sucting cavity 8 with the cavity that forms between the inside and outside rotor.Have the filler opening 9 that can be communicated with pumping cavity 7 on the pump housing, have the oil outlet 10 that can be communicated with oil sucting cavity 8 on the protecgulum 2, filler opening 9 is located at the side of the pump housing 1, and oil outlet 10 is located at the upper-end surface of protecgulum 2.As Fig. 5, Fig. 6, have the oil road 11 that is communicated with pumping cavity 7 and oil outlet 10 on the pump housing 1, oil road 11 is semi-circular.As Fig. 7, Fig. 8, bonnet is provided with the oil duct that adapts with oil road 11 shapes.
The working principle of this pump is: internal rotor 5 drives external rotor 4 one clockwise direction and rotates under the driving of splined shaft.Hydraulic oil enters the oil sucting cavity 8 of low voltage side from the filler opening 9 of oil pump side, be engaged pumping cavity 7 one sides that high pressure is brought in the teeth groove space of the internal rotor 5 of rotation and external rotor 4 into again, flow out through the oil outlet of high-pressure oil duct under pressure, for hydraulic system provides hydraulic power from bonnet 3.
Claims (6)
1. car automatic transmission Gerotor pump, comprise the pump housing (1), pump housing two ends are connected with protecgulum (2) and bonnet (3) respectively, it is characterized in that being provided with in the described pump housing (1) external rotor (4), external rotor (4) inside is engaged with the internal rotor (5) that can wear live axle, and internal rotor and external rotor are the decentraction setting; Be provided with oil sealing piece (6) between described internal rotor (5) and the external rotor (4), the oil sealing piece is divided into pumping cavity (7) and oil sucting cavity (8) with the cavity that forms between the inside and outside rotor; Have the filler opening (9) that can be communicated with on the described pump housing, have the oil outlet (10) that can be communicated with on the protecgulum (2) with oil sucting cavity (8) with pumping cavity (7); A wherein flank profil line (41) of described external rotor (4) denticle and another flank profil line (42) of adjacent denticle are distributed on the circular arc of same circle, and the denticle of internal rotor (5) is the cycloidal tooth profile with external rotor round-arced tooth phase conjugate.
2. car automatic transmission Gerotor pump according to claim 1, the number of teeth that it is characterized in that described internal rotor (5) is 8～10, many 2 of the gear ratio internal rotor of external rotor (4).
3. car automatic transmission Gerotor pump according to claim 1 and 2 is characterized in that having the oil road (11) that is communicated with pumping cavity (7) and oil outlet (10) on the described pump housing (1), and oil road (11) is semi-circular.
4. car automatic transmission Gerotor pump according to claim 1 and 2 is characterized in that described protecgulum (2), bonnet (3) inside all are provided with bearing (12).
5. car automatic transmission Gerotor pump according to claim 3 is characterized in that described protecgulum (2), bonnet (3) inside all are provided with bearing (12).
6. car automatic transmission Gerotor pump according to claim 1 and 2, described filler opening (9) is located at the side of the pump housing (1), and oil outlet (10) is located at the upper-end surface of protecgulum (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203008512U CN201351601Y (en) | 2009-02-25 | 2009-02-25 | Cycloidal pump used for automatic speed changer of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203008512U CN201351601Y (en) | 2009-02-25 | 2009-02-25 | Cycloidal pump used for automatic speed changer of car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201351601Y true CN201351601Y (en) | 2009-11-25 |
Family
ID=41374989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009203008512U Expired - Fee Related CN201351601Y (en) | 2009-02-25 | 2009-02-25 | Cycloidal pump used for automatic speed changer of car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201351601Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043294A (en) * | 2019-12-30 | 2020-04-21 | 綦江齿轮传动有限公司 | Cycloid inner rotor oil pump device for front power takeoff |
| CN114776581A (en) * | 2022-06-07 | 2022-07-22 | 河南航天液压气动技术有限公司 | Multi-stage output cycloid pump |
-
2009
- 2009-02-25 CN CNU2009203008512U patent/CN201351601Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043294A (en) * | 2019-12-30 | 2020-04-21 | 綦江齿轮传动有限公司 | Cycloid inner rotor oil pump device for front power takeoff |
| CN114776581A (en) * | 2022-06-07 | 2022-07-22 | 河南航天液压气动技术有限公司 | Multi-stage output cycloid pump |
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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 |
Granted publication date: 20091125 Termination date: 20170225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |