CN201354733Y - Internal gear oil pump for automatic speed changer of large bus - Google Patents
Internal gear oil pump for automatic speed changer of large bus Download PDFInfo
- Publication number
- CN201354733Y CN201354733Y CNU2009203008423U CN200920300842U CN201354733Y CN 201354733 Y CN201354733 Y CN 201354733Y CN U2009203008423 U CNU2009203008423 U CN U2009203008423U CN 200920300842 U CN200920300842 U CN 200920300842U CN 201354733 Y CN201354733 Y CN 201354733Y
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- pump
- oil
- internal gear
- gear
- internal
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Abstract
The utility model relates to a hydraulic oil pump, in particular to an internal gear oil pump for an automatic speed changer of a large bus. The utility model mainly solves the technical field in the prior art that as the transitional cycloid gear pump, an internal gear pump cannot ensure that the oil pump can bear a higher rotating speed; the oil pressure pulsation is larger and the noise is higher; when the oil pump runs at a high speed, the transmission is unstable; and the volumetric efficiency is lower. The internal gear oil pump comprises a pump body and a pump cover; an internal gear is arranged in the pump body; a driving gear is meshes with the interior of the internal gear; a swing link is arranged between the internal gear and the driving gear, and divides a hollow cavity formed between the internal gear and the driving gear into an oil press cavity and an oil suction cavity; the oil press cavity and the oil suction cavity are respectively communicated with an oil outlet hole and an oil inlet hole formed on the pump cover; an oil return hole is also formed on the combination surface of the pump body and the pump cover; and one tooth profile of a tooth body of the internal gear and another tooth profile of another tooth body adjacent to the previous tooth body are distributed on an identical arc.
Description
Technical field
The utility model relates to a kind of hydraulic-pressure pump, especially relates to a kind of to the isostructural improvement of internal gearing oil pump for large-scale bus automatic transmission.
Background technique
Along with the development of urban public transport, increasing to the demand of full-sized bus, ride quality requires more and more higher, require that speed is fast, automatic speed changing, handiness, travel steadily comfortable.The internal gearing oil pump of large-scale luxurious public transit vehicle automatic transmission is current can only to rely on import to solve, automatic transmission becomes the obstacle of restriction China independent brand public transit vehicle development, and high performance hydraulic-pressure pump is the main key that realizes the automatic transmission production domesticization.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 this crescent gear pump is the same with traditional cycloid gear pump, can't guarantee that oil pump can bear high rotational speed, and hydro pulse, noise are bigger, when running up transmission more not steady, volumetric efficiency is lower.
Summary of the invention
The utility model technical issues that need to address provide a kind of internal gearing oil pump for large-scale bus automatic transmission, it mainly is that solution existing in prior technology crescent gear pump is the same with traditional cycloid gear pump, can't guarantee that oil pump can bear high rotational speed, hydro pulse, noise are bigger, transmission is not more steady when running up, the low technical problem that waits of volumetric efficiency.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
Internal gearing oil pump for large-scale bus automatic transmission of the present utility model, comprise the pump housing and the pump cover that link together, it is characterized in that being provided with internal gear in the described pump housing, but internal gear inside is engaged with the driving gear of cross-under Pump wheel shaft, internal gear and driving gear are the decentraction setting; Be provided with swing link between described internal gear and the driving gear, swing link is divided into pumping cavity and oil sucting cavity with the cavity that forms between internal gear and the driving gear, pumping cavity is communicated with oil outlet and the oil inlet hole opened on pump cover respectively with oil sucting cavity, also offers spill port on the junction plane of the pump housing and pump cover; A wherein flank profil line of described internal gear denticle and another flank profil line of adjacent denticle are distributed on the circular arc of same circle, and the number of teeth of described internal gear is 11～17, few 2 of the number of teeth of the gear ratio internal gear of driving gear.Internal gearing oil pump is installed on the housing of the adjacent torque-converters of speed changer, and the Pump wheel shaft of torque-converters links by shift fork and driving gear, has settled internal gear pair at pump housing mesopore.Motor drives driving gear by Pump wheel shaft and rotates, and drives internal gear and rotates in the same way, forms crescent gear pump to the hydraulic system fuel feeding.The design that internal gear pair is optimized through innovation on parameter, particularly tooth-formation of gear is the cycloidal tooth profile of a new generation, be very different selecting for use of gear parameter, guaranteed that oil pump can bear high rotating speed, hydro pulse is little, noise is little, stable drive, volumetric efficiency advantages of higher with traditional cycloid.
As preferably, the tooth top of described internal gear is a circular arc.The tooth top of driving gear also is a circular arc, and the bottom of corresponding internal gear, driving gear between cog also is a circular arc.
As preferably, the hull shape of described pump housing cylindrical and the adjacent torque-converters of speed changer to be installed adapts.The cylindrical of the pump housing is through processing, and the precision height can make compact structure on the correct housing that is installed in torque-converters of oil pump, simultaneously oil inlet and outlet is arranged on the pump cover end face, has reached to reduce the oil pump volume, and little purpose takes up room.
As preferably, the inside of the described pump housing is provided with needle bearing.
As preferably, be provided with axle sleeve in the endoporus of described driving gear, the outer end of the pump housing is with skeleton oil seal.In the driving gear endoporus bimetallic bearing is housed, can bears higher load and rotating speed, guaranteed that oil pump can run well.
As preferably, also be provided with the O type circle of doing sealing on the junction plane of the described pump housing and pump cover.
As preferably, the described pump housing and pump cover are located with straight pin, and are screwed together.Straight pin can be two, and screw can be socket head screw.
Therefore, the utlity model has that flow is big, noise is low, vibration is little, volume is little, functional, characteristics such as simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 3 is working principle schematic representation of the present utility model.
Component, position and numbering among the figure: the pump housing 1, pump cover 2, internal gear 3, drive gear teeth profile 3-1,3-2, driving gear 4, swing link 5, pumping cavity 6, oil sucting cavity 7, oil outlet 8, oil inlet hole 9, spill port 10, needle bearing 11, axle sleeve 12, outside framework oil seal 13, O type circle 14, straight pin 15, screw 16.
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 internal gearing oil pump for large-scale bus automatic transmission that this is routine as Fig. 1, Fig. 2, is made of the pump housing 1, pump cover 2, internal gear pair.As Fig. 3, internal gear pair includes the internal gear 3 and driving gear 4 of the decentraction of the transmission that is meshing with each other, be provided with swing link 5 between internal gear 3 and the driving gear 4, the seal container that internal gear pair and pump housing hole wall are surrounded is engaged line and swing link 5 is cut apart formation pumping cavity 6 and oil sucting cavity 7, and pumping cavity is communicated with oil outlet 8 and the oil inlet hole 9 opened on pump cover 2 respectively with oil sucting cavity.The number of teeth of internal gear 3 is 15, and the number of teeth of driving gear 4 is 13.A wherein flank profil line 31 of internal gear 3 denticles and another flank profil line 32 of adjacent denticle are distributed on the circular arc of same circle.The pump housing 1 and 2 straight pins of pump cover 2 usefulness, 15 location, fixing with 3 socket head screws 16.The pump housing 1 seals with the O type circle 14 on the big plane of the pump housing with the junction plane of pump cover 2, offer spill port 10 on the junction plane, the inside of the pump housing 1 is provided with needle bearing 11, be provided with axle sleeve 12 in the endoporus of driving gear 4, the outer end of the pump housing makes the oil return in the needle bearing lead to spill port inflow oil inlet hole 9 through oil duct with outside framework oil seal 13 sealings.Oil pump correctly is installed to oil pump on the housing of the adjacent torque-converters of speed changer with six screws 16 with the pump housing 1 cylindrical location. and the bearing hole on needle bearing on the pump housing and the driving gear 4 can be settled Pump wheel shaft together.2 keyways of oil pump drive gear 4 usefulness link by the spline housing of crossing on shift fork and the converter pump.
During use, when motor is done counterclockwise to rotate with shift fork driving driving gear 4 by Pump wheel shaft, internal gear 3 is done rotation in the same way, at this moment the gear teeth that meshing in the oil sucting cavity 7 are thrown off gradually and are increased sealed volume, form parital vacuum, fluid enters oil sucting cavity 7 through fuel sucking pipe from oil inlet hole 9 under the effect of atmospheric pressure; The gear teeth mesh in succession, when the gear teeth enter between cog, and volume reducing, the fluid that brings to pumping cavity 6 from oil sucting cavity 7 is forced out outside the pump from oil outlet 8, enters the hydraulic system of automatic transmission through oil outlet tube.
Claims (8)
1. internal gearing oil pump for large-scale bus automatic transmission, comprise the pump housing (1) and pump cover (2) that link together, it is characterized in that being provided with in the described pump housing (1) internal gear (3), internal gear (3) but inside is engaged with the driving gear (4) of cross-under Pump wheel shaft, internal gear and driving gear are the decentraction setting; Be provided with swing link (5) between described internal gear (3) and the driving gear (4), swing link is divided into pumping cavity (6) and oil sucting cavity (7) with the cavity that forms between internal gear and the driving gear, pumping cavity is communicated with oil outlet (8) and the oil inlet hole (9) opened on pump cover (2) respectively with oil sucting cavity, also offers spill port (10) on the junction plane of the pump housing and pump cover; A wherein flank profil line (3-1) of described internal gear (3) denticle is distributed on the circular arc of same circle with another flank profil line (3-2) of adjacent denticle, the number of teeth of internal gear (3) is 11～17, few 2 of the number of teeth of the gear ratio internal gear (3) of driving gear (4).
2. internal gearing oil pump for large-scale bus automatic transmission according to claim 1, the tooth top that it is characterized in that described internal gear (3) is a circular arc.
3. internal gearing oil pump for large-scale bus automatic transmission according to claim 1 and 2, the housing endoporus that it is characterized in that the described pump housing (1) cylindrical and the adjacent torque-converters of speed changer to be installed is for correctly to cooperate.
4. internal gearing oil pump for large-scale bus automatic transmission according to claim 1 and 2 is characterized in that the inside of the described pump housing (1) is provided with needle bearing (11).
5. internal gearing oil pump for large-scale bus automatic transmission according to claim 3 is characterized in that the inside of the described pump housing (1) is provided with needle bearing (11).
6. internal gearing oil pump for large-scale bus automatic transmission according to claim 1 and 2 is characterized in that being provided with axle sleeve (12) in the endoporus of described driving gear (4), and the outer end of the pump housing seals with outside framework oil seal (13).
7. internal gearing oil pump for large-scale bus automatic transmission according to claim 1 and 2 is characterized in that also being provided with the O type circle (14) of doing sealing on the junction plane of the described pump housing (1) and pump cover (2).
8. internal gearing oil pump for large-scale bus automatic transmission according to claim 1 and 2 is characterized in that the described pump housing (1) and pump cover (2) usefulness straight pin (15) location, and is fixed together with screw (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203008423U CN201354733Y (en) | 2009-02-25 | 2009-02-25 | Internal gear oil pump for automatic speed changer of large bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203008423U CN201354733Y (en) | 2009-02-25 | 2009-02-25 | Internal gear oil pump for automatic speed changer of large bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354733Y true CN201354733Y (en) | 2009-12-02 |
Family
ID=41411074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009203008423U Expired - Fee Related CN201354733Y (en) | 2009-02-25 | 2009-02-25 | Internal gear oil pump for automatic speed changer of large bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354733Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425221A (en) * | 2019-07-18 | 2019-11-08 | 常州嵘驰发动机技术有限公司 | A kind of bearing for fluid pump |
-
2009
- 2009-02-25 CN CNU2009203008423U patent/CN201354733Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425221A (en) * | 2019-07-18 | 2019-11-08 | 常州嵘驰发动机技术有限公司 | A kind of bearing for fluid 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20170225 |