CN216894883U - Oil pump of automatic transmission of automobile - Google Patents
Oil pump of automatic transmission of automobile Download PDFInfo
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- CN216894883U CN216894883U CN202122667233.5U CN202122667233U CN216894883U CN 216894883 U CN216894883 U CN 216894883U CN 202122667233 U CN202122667233 U CN 202122667233U CN 216894883 U CN216894883 U CN 216894883U
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- oil pump
- oil
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- inner rotor
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Abstract
The utility model provides an automobile automatic transmission oil pump. The oil pump comprises a driving gear, a driving shaft, a sliding bearing, an oil pump body, an outer rotor, an inner rotor and an oil pump cover. The driving gear is a helical gear. And the bevel gear is adopted for transmission, so that the transmission ratio is stable and the straight gear is stable. The helical gear has axial force and radial force, and the thrust bearing is adopted to offset the axial component force caused by the transmission of the helical gear. And the sliding bearing is adopted to position the driving shaft and the gear to offset radial component force caused by the transmission of the bevel gear. Wherein the axial force is directed towards the drive gear and is eliminated by the thrust washer. The radial force is born by a sliding bearing consisting of an oil pump cover shaft hole and an oil pump body center hole. Lubricating oil is introduced between the oil pump body and the pump shaft through an oil groove, and all friction pairs are ensured to be in a fluid lubrication state.
Description
Technical Field
The utility model relates to the technical field of fluid transmission devices, in particular to an oil pump of an automatic transmission of an automobile.
Background
Automatic transmissions are increasingly used in modern passenger cars, and oil pumps are one of the core components of AT, CVT and DCT automatic transmissions. The oil pump assembly is used as a hydraulic power source of the transmission, and provides high-pressure oil for driving the clutch and the gear selecting and shifting mechanism and low-pressure oil for cooling and lubricating parts such as the clutch, the shaft teeth, the synchronizer, the bearing and the like for the sound changer.
Therefore, it is of great significance to provide an oil pump design that provides low pressure pulsations and low noise.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an oil pump of an automatic transmission of an automobile, which aims to solve the problems in the prior art.
The technical scheme adopted for achieving the purpose of the utility model is that the automobile automatic transmission oil pump comprises a driving gear, a driving shaft, a sliding bearing, an oil pump body, an outer rotor, an inner rotor and an oil pump cover.
The oil pump body comprises an end cover and a pump body. The oil pump body has a rotor chamber. And the end cover is provided with a working boss at the center of the end surface at one side facing the rotor chamber. The working boss comprises a connecting section and an inner rotor embedding section. The connecting section and the inner rotor embedding section are cylinders which are coaxially arranged. And a thrust washer mounting groove is formed in the end face of the inner rotor embedding section. The end cap has a central bore. The center hole penetrates through the end cover and the working boss.
And an outer rotor and an inner rotor which are internally meshed are arranged in the rotor chamber. The cavity of the rotor chamber is divided into an oil suction cavity and an oil discharge cavity by the meshing line of the outer rotor and the inner rotor. The shaft hole of the inner rotor comprises an inner rotor embedding section containing hole, a driving shaft flange containing hole and a flat square transmission hole which are coaxially arranged in sequence. The inner rotor embedding section is embedded into the inner rotor embedding section accommodating hole.
The drive shaft penetrates through the drive gear, the oil pump body, the inner rotor and the oil pump cover in sequence. The drive shaft comprises an end shaft, a drive shaft flange and a flat square shaft which are coaxially arranged in sequence. The end shaft penetrates through the central hole and the shaft hole of the driving gear. The sliding bearing is arranged in the central bore. The sliding bearing is sleeved on the end shaft. And a thrust washer is arranged in the thrust washer mounting groove. The drive shaft flange is received in the drive shaft flange receiving bore. The flat square shaft passes through the flat square transmission hole.
The oil pump cover is detachably connected with the oil pump body. The oil pump cover closes the rotor chamber. An oil inlet is formed in the oil pump body. An oil outlet is formed in the oil pump cover. The low-pressure oil cavity is communicated with the oil inlet, and the high-pressure oil cavity is communicated with the oil outlet.
Further, the driving gear is in interference coupling with the end shaft.
Further, the driving gear is a helical gear.
Furthermore, the oil pump cover is connected with the oil pump body in a positioning mode through a positioning pin.
Further, the thrust washer mounting groove is connected with the oil discharge cavity through a lubricating oil groove. The thrust washer is provided with grooves which are uniformly distributed.
Further, the difference value of the number of teeth of the outer rotor and the inner rotor is 1.
The technical effects of the utility model are undoubted:
A. the gear positioning precision is high, the noise is low, and the structure is compact;
B. the method can be widely applied to the automatic transmission of the automobile;
C. lubricating oil is introduced between the oil pump body and the pump shaft through an oil groove, so that each friction pair is ensured to be in a fluid lubrication state;
D. a thrust bearing is adopted to offset the axial component force caused by the bevel gear transmission, and a sliding bearing is adopted to offset the radial component force caused by the bevel gear transmission.
Drawings
FIG. 1 is a schematic structural diagram of an oil pump of an automatic transmission of an automobile;
FIG. 2 is a schematic view of a drive shaft configuration;
FIG. 3 is a schematic view of an inner rotor structure;
FIG. 4 is a schematic structural view of an outer rotor;
FIG. 5 is a schematic view of a thrust washer;
FIG. 6 is a schematic structural view of a rotor chamber of the oil pump body;
fig. 7 is a schematic view of a structure of a lubricating oil groove.
In the figure: the oil pump comprises a driving gear 1, a driving shaft 2, an end shaft 201, a driving shaft flange 202, a flat square shaft 203, a sliding bearing 3, an oil pump body 4, a working boss 401, a thrust washer mounting groove 402, a center hole 403, a lubricating oil groove 404, an oil pump cover 5, an outer rotor 6, an inner rotor 7, an inner rotor embedding section containing hole 701, a driving shaft flange containing hole 702, a flat square transmission hole 703 and a thrust washer 8.
Detailed Description
The present invention will be further described with reference to the following examples, but it should be understood that the scope of the subject matter described above is not limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the utility model and the scope of the utility model is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1, the present embodiment provides an oil pump for an automotive automatic transmission, including a drive gear 1, a drive shaft 2, a sliding bearing 3, an oil pump body 4, an outer rotor 6, an inner rotor 7, and an oil pump cover 5.
Referring to fig. 6, the oil pump body 4 includes an end cover and a pump body. The oil pump body 4 has a rotor chamber. The end cover has a working boss 401 at the center of the end face at one side facing the rotor chamber. The working boss 401 includes a connecting section and an inner rotor insertion section. The connecting section and the inner rotor embedding section are cylinders which are coaxially arranged. A thrust washer mounting groove 402 is provided on an end surface of the inner rotor insertion section. The thrust washer mounting groove 402 is connected to the oil discharge chamber through a lubrication groove 404. The oil groove 404 is a minute triangular groove as shown in fig. 7. The end cap has a central aperture 403. The central bore 403 extends through the end cap and the working boss 401.
An outer rotor 6 and an inner rotor 7 which are internally meshed are arranged in the rotor chamber. The meshing line of the outer rotor 6 and the inner rotor 7 divides the cavity of the rotor chamber into an oil suction cavity and an oil discharge cavity.
Referring to fig. 3, the shaft hole of the inner rotor 7 includes an inner rotor insertion section receiving hole 701, a drive shaft flange receiving hole 702, and a flat square transmission hole 703, which are coaxially arranged in this order. The inner rotor insertion section is inserted into the inner rotor insertion section receiving hole 701. Fig. 3a and 3b show different views of the inner rotor 7.
The driving shaft 2 sequentially penetrates through the driving gear 1, the oil pump body 4, the inner rotor 7 and the oil pump cover 5. Referring to fig. 2, the driving shaft 2 includes an end shaft 201, a driving shaft flange 202 and a flat square shaft 203 which are coaxially arranged in sequence. The end shaft 201 passes through the center hole 403 and the shaft hole of the driving gear 1. The slide bearing 3 is arranged in a central hole 403. The sliding bearing 3 is sleeved on the end shaft 201. Hydraulic oil enters a small gap between the end shaft 201 and the sliding bearing 3 and between the end shaft and the center hole 403, a dynamic load oil film is established, and the radial force load of the driving shaft is borne. A thrust washer 8 is installed in the thrust washer installation groove 402. Referring to fig. 5, the thrust washer 8 is provided with evenly distributed grooves. Fig. 5a and 5b each show a different view of the thrust washer 8. High pressure oil from the rotor chamber discharge chamber enters thrust washer 8 through oil groove 404 to ensure lubrication of thrust washer 8 and drive shaft flange 202. The drive shaft flange 202 is received in the drive shaft flange receiving bore 702. The flat square shaft 203 passes through the flat square transmission hole 703.
The oil pump cover 5 is detachably connected with the oil pump body 4. The oil pump cover 5 is connected with the oil pump body 4 in a positioning mode through a positioning pin. The oil pump cover 5 closes the rotor chamber. An oil inlet is formed in the oil pump body 4. An oil outlet is arranged on the oil pump cover 5. The low-pressure oil cavity is communicated with the oil inlet, and the high-pressure oil cavity is communicated with the oil outlet.
In operation, engine torque is transferred to drive gear 1 and then to drive shaft 2. The driving shaft 2 drives the inner rotor 7 to rotate through the flat square shaft 203, the inner rotor 7 drives the outer rotor 6 to periodically absorb and discharge oil, the transmitted mechanical energy is converted into hydraulic energy, and work is output through an oil outlet of the oil pump.
It is to be noted that the drive gear 1 is a helical gear. And the bevel gear is adopted for transmission, so that the transmission ratio is stable and the straight gear is stable. The helical gear has axial force and radial force, and the thrust bearing is adopted to offset the axial component force caused by the transmission of the helical gear. And the sliding bearing is adopted to position the driving shaft and the gear to offset radial component force caused by the transmission of the bevel gear. In which the axial forces are directed towards the drive gear 1 and are eliminated by the thrust washer 8. The radial force is born by a sliding bearing consisting of an oil pump cover shaft hole and an oil pump body center hole. Lubricating oil is introduced between the oil pump body and the pump shaft through an oil groove, and all friction pairs are ensured to be in a fluid lubrication state.
Example 2:
the main structure of the present embodiment is the same as that of embodiment 1, wherein the driving gear 1 is coupled with the end shaft 201 in an interference manner. The driving gear 1 is lubricated by the oil injection of the gearbox.
Example 3:
the main structure of this embodiment is the same as embodiment 1, wherein a schematic structural diagram of the outer rotor is shown in fig. 4. The difference between the number of teeth of the outer rotor 6 and the inner rotor 7 is 1.
Claims (6)
1. An automobile automatic transmission oil pump is characterized in that: the oil pump comprises a driving gear (1), a driving shaft (2), a sliding bearing (3), an oil pump body (4), an outer rotor (6), an inner rotor (7) and an oil pump cover (5);
the oil pump body (4) comprises an end cover and a pump body; the oil pump body (4) has a rotor chamber; the end cover is provided with a working boss (401) at the center of the end face of one side facing the rotor chamber; the working boss (401) comprises a connecting section and an inner rotor embedding section; the connecting section and the inner rotor embedding section are cylinders which are coaxially arranged; a thrust washer mounting groove (402) is formed in the end face of the inner rotor embedding section; the end cap has a central bore (403); the central hole (403) penetrates through the end cover and the working boss (401);
an outer rotor (6) and an inner rotor (7) which are internally meshed are arranged in the rotor chamber; the cavity of the rotor chamber is divided into an oil suction cavity and an oil discharge cavity by the meshing line of the outer rotor (6) and the inner rotor (7); the shaft hole of the inner rotor (7) comprises an inner rotor embedding section containing hole (701), a driving shaft flange containing hole (702) and a flat square transmission hole (703) which are coaxially arranged in sequence; the inner rotor embedding section is embedded into the inner rotor embedding section accommodating hole (701);
the driving shaft (2) sequentially penetrates through the driving gear (1), the oil pump body (4), the inner rotor (7) and the oil pump cover (5); the driving shaft (2) comprises an end shaft (201), a driving shaft flange (202) and a flat square shaft (203) which are coaxially arranged in sequence; the end shaft (201) penetrates through the central hole (403) and the shaft hole of the driving gear (1); the plain bearing (3) is arranged in a central bore (403); the sliding bearing (3) is sleeved on the end shaft (201); a thrust washer (8) is mounted in the thrust washer mounting groove (402); the drive shaft flange (202) is received in a drive shaft flange receiving bore (702); the flat square shaft (203) penetrates through the flat square transmission hole (703);
the oil pump cover (5) is detachably connected with the oil pump body (4); the oil pump cover (5) seals the rotor chamber; an oil inlet is formed in the oil pump body (4); an oil outlet is arranged on the oil pump cover (5); the low-pressure oil cavity is communicated with the oil inlet, and the high-pressure oil cavity is communicated with the oil outlet.
2. The automotive automatic transmission oil pump according to claim 1, characterized in that: the driving gear (1) is in interference coupling with the end shaft (201).
3. The automotive automatic transmission oil pump according to claim 1, characterized in that: the driving gear (1) is a helical gear.
4. The automotive automatic transmission oil pump according to claim 1, characterized in that: the oil pump cover (5) is connected with the oil pump body (4) in a positioning mode through a positioning pin.
5. The automotive automatic transmission oil pump according to claim 1, characterized in that: the thrust washer mounting groove (402) is connected with the oil discharge cavity through a lubricating oil groove (404); grooves are uniformly distributed on the thrust washer (8).
6. The automotive automatic transmission oil pump according to claim 1, characterized in that: and the difference value of the number of teeth of the outer rotor (6) and the inner rotor (7) is 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122667233.5U CN216894883U (en) | 2021-11-02 | 2021-11-02 | Oil pump of automatic transmission of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122667233.5U CN216894883U (en) | 2021-11-02 | 2021-11-02 | Oil pump of automatic transmission of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216894883U true CN216894883U (en) | 2022-07-05 |
Family
ID=82201563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122667233.5U Active CN216894883U (en) | 2021-11-02 | 2021-11-02 | Oil pump of automatic transmission of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216894883U (en) |
-
2021
- 2021-11-02 CN CN202122667233.5U patent/CN216894883U/en active Active
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