CN217055324U - Oil pump structure with step oil pump shaft - Google Patents
Oil pump structure with step oil pump shaft Download PDFInfo
- Publication number
- CN217055324U CN217055324U CN202220555846.1U CN202220555846U CN217055324U CN 217055324 U CN217055324 U CN 217055324U CN 202220555846 U CN202220555846 U CN 202220555846U CN 217055324 U CN217055324 U CN 217055324U
- Authority
- CN
- China
- Prior art keywords
- oil pump
- inner rotor
- pump shaft
- shaft
- sprocket
- 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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- 238000009434 installation Methods 0.000 claims abstract description 15
- 230000006978 adaptation Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 125
- 238000010586 diagram Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 1
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Abstract
The utility model relates to a gasoline engine technical field specifically discloses an oil pump structure with step oil pump axle, including the oil pump axle, the oil pump shell, the drive pin, the oil pump inner rotor, sprocket installation step, the oil pump outer rotor, driven sprocket and oil pump apron, the one end of oil pump axle has the drive pinhole, the other end of oil pump axle is provided with sprocket installation step, the inside of oil pump inner rotor has the drive keyway, the drive pin inserts to the drive pinhole, and drive pin and drive keyway adaptation, the oil pump outer rotor rotates with the oil pump inner rotor to be connected, and the cover is established in the outside of oil pump inner rotor, driven sprocket installs on sprocket installation step, the oil pump apron covers closes the oil pump shell. The oil pump has the advantages of simple structure, reliable performance, reduced manufacturing cost, reduced assembly procedures and wide applicability.
Description
Technical Field
The utility model relates to a gasoline engine field especially relates to an oil pump structure with step oil pump axle.
Background
The motorcycle engine mostly adopts a rotor type oil pump, but the oil pump has various shapes and sizes according to the specific space position of various engines due to compact structure. More commonly, as shown in fig. 1: the outer diameter of the oil pump shaft is unchanged, and the oil pump shaft is connected with the inner rotor of the oil pump through a transmission pin and is in transmission.
Another engine oil pump structure is shown in fig. 2: the outer leakage part of the oil pump shaft is provided with an installation platform of a transmission chain wheel, so that the installation mode of the oil pump shaft can only be from outside to inside, the pin shaft connection mode of the oil pump shaft and the oil pump inner rotor in the conventional structure cannot be realized, and the connection mode of the oil pump shaft and the oil pump inner rotor is flat-square connection; in order to limit the outward falling of the oil pump shaft, an oil pump shield is added above the oil pump.
However, the above structure has many parts due to the addition of the oil pump shield, the assembly is complicated, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oil pump structure with step oil pump axle aims at solving the oil pump structure among the prior art owing to increased the oil pump guard shield, and it has spare part more, and the assembly is complicated, and cost-push's technical problem.
For realizing the above-mentioned purpose, the utility model discloses a pair of oil pump structure with step oil pump axle, including oil pump axle, oil pump shell, transmission pin, oil pump inner rotor, sprocket installation step, oil pump outer rotor, driven sprocket and oil pump apron, the one end of oil pump axle has the transmission pinhole, the other end of oil pump axle is provided with sprocket installation step, the inside of oil pump inner rotor has the transmission cotter way, the transmission pin inserts extremely the transmission pinhole, just the transmission pin with transmission cotter way adaptation, the oil pump outer rotor with oil pump inner rotor rotates to be connected, and the cover is established the outside of oil pump inner rotor, driven sprocket installs on the sprocket installation step, the oil pump apron closes the oil pump shell.
The oil pump structure with the step oil pump shaft further comprises a fixing screw, and the fixing screw penetrates through the oil pump cover plate and is inserted into the oil pump shell to be in threaded fit with the oil pump shell.
The number of the fixing screws is multiple, and the fixing screws are uniformly distributed along the axial center line of the oil pump cover plate.
The oil pump cover plate is internally provided with a concave part, and the concave part is in clearance fit with one end of the oil pump shaft.
The utility model discloses an oil pump structure with step oil pump axle, through the transmission pinhole is arranged on the oil pump axle, its position does oil pump axle downstream reaches extreme position, promptly the lower surface of sprocket installation step with during the contact of the boss face on the oil pump shell, the transmission pinhole just exposes the lower surface of oil pump inner rotor, so that the transmission round pin can insert smoothly the oil pump is epaxial the transmission pinhole. After the transmission pin is installed, the oil pump is pushed to move upwards, so that the transmission pin is clamped into the corresponding transmission pin groove on the inner rotor of the oil pump, the oil pump cover plate is covered, the oil pump cover plate is fastened by the fixing screw, the assembly is completed, and the downward movement and the upward movement of the oil pump shaft are limited by the oil pump cover plate and the inner rotor of the oil pump through the transmission pin. When the oil pump works, the driven chain wheel drives the oil pump shaft to rotate, the oil pump shaft drives the inner oil pump rotor to rotate through the transmission pin, and the inner oil pump rotor drives the outer oil pump rotor to rotate, so that an oil pumping function is realized. The oil pump has the advantages of simple structure, reliable performance, reduced manufacturing cost, reduced assembly procedures and wide applicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an internal structure diagram of an oil pump of the related art.
Fig. 2 is a schematic diagram of another oil pump structure of the prior art.
Fig. 3 is a schematic structural diagram of the oil pump structure with the step oil pump shaft of the present invention before assembly.
Fig. 4 is a schematic structural diagram of the oil pump structure with the step oil pump shaft of the present invention.
1-an oil pump shaft, 2-an oil pump shell, 3-a transmission pin, 4-an oil pump inner rotor, 5-a sprocket mounting step, 6-a transmission pin hole, 7-a transmission pin groove, 8-an oil pump cover plate, 9-an oil pump outer rotor, 10-a fixing screw, 11-a driven sprocket and 12-a concave part.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Please refer to fig. 1 to 4, the utility model provides an oil pump structure with step oil pump axle, including oil pump axle 1, oil pump housing 2, driving pin 3, oil pump inner rotor 4, sprocket installation step 5, oil pump outer rotor 9, driven sprocket 11 and oil pump apron 8, the one end of oil pump axle 1 has driving pin hole 6, the other end of oil pump axle 1 is provided with sprocket installation step 5, the inside of oil pump inner rotor 4 has driving pin groove 7, driving pin 3 inserts to driving pin hole 6, just driving pin 3 with driving pin groove 7 adaptation, oil pump outer rotor 9 with oil pump inner rotor 4 rotates and is connected, and the cover is established the outside of oil pump inner rotor 4, driven sprocket 11 is installed on sprocket installation step 5, oil pump apron 8 covers oil pump housing 2.
The oil pump structure with the step oil pump shaft further comprises a fixing screw 10, and the fixing screw 10 penetrates through the oil pump cover plate 8 and is inserted into the oil pump shell 2 to be in threaded fit with the oil pump cover plate.
In this embodiment, the transmission pin hole 6 is disposed on the oil pump shaft 1, and the position of the transmission pin hole 6 is that the oil pump shaft 1 moves downward to the limit position, that is, when the lower surface of the sprocket mounting step 5 contacts with the boss surface on the oil pump housing 2, the transmission pin hole 6 just exposes the lower surface of the oil pump inner rotor 4, so that the transmission pin 3 can be smoothly inserted into the transmission pin hole 6 on the oil pump shaft 1. After the transmission pin 3 is installed, the oil pump shaft 1 is pushed to move upwards, the transmission pin 3 is clamped into the corresponding transmission pin groove 7 on the oil pump inner rotor 4, the oil pump cover plate 8 is covered and fastened by the fixing screw 10, the assembly is completed, and the oil pump shaft 1 is limited by the oil pump cover plate 8 and the oil pump inner rotor 4 to move downwards and upwards through the transmission pin 3. When the oil pump works, the driven chain wheel 11 drives the oil pump shaft 1 to rotate, the oil pump shaft 1 drives the oil pump inner rotor 4 to rotate through the transmission pin 3, and the oil pump inner rotor 4 drives the oil pump outer rotor 9 to rotate, so that an oil pumping function is realized. The oil pump has the advantages of simple structure, reliable performance, reduced manufacturing cost, reduced assembly procedures and wide applicability.
Further, the number of the fixing screws 10 is plural, and the plural fixing screws 10 are uniformly distributed along the axial center line of the oil pump cover plate 8.
In the present embodiment, the plurality of fixing screws 10 are provided, so that the connection between the oil pump cover plate 8 and the oil pump housing 2 can be more firmly and stably made.
Further, the oil pump cover plate 8 has a recess 12 inside, and the recess 12 is in clearance fit with one end of the oil pump shaft 1.
In the present embodiment, the recess 12 is in clearance fit with the oil pump shaft 1, so as to ensure that the oil pump shaft 1 rotates stably.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Claims (4)
1. An oil pump structure with a step oil pump shaft is characterized in that,
including oil pump shaft, oil pump housing, driving pin, oil pump inner rotor, sprocket installation step, oil pump outer rotor, driven sprocket and oil pump apron, the one end of oil pump shaft has the transmission pinhole, the other end of oil pump shaft is provided with sprocket installation step, the inside of oil pump inner rotor has the transmission cotter way, the driving pin inserts extremely the transmission pinhole, just the driving pin with transmission cotter way adaptation, the oil pump outer rotor with oil pump inner rotor rotates to be connected, and the cover is established the outside of inner rotor, driven sprocket installs on the sprocket installation step, the oil pump apron lid closes oil pump housing.
2. The oil pump structure having a stepped oil pump shaft according to claim 1,
the oil pump structure with the step oil pump shaft further comprises a fixing screw, and the fixing screw penetrates through the oil pump cover plate and is inserted into the oil pump shell to be in threaded fit with the oil pump shell.
3. The oil pump structure having a stepped oil pump shaft according to claim 2,
the number of the fixing screws is multiple, and the fixing screws are uniformly distributed along the axial center line of the oil pump cover plate.
4. The oil pump structure having a stepped oil pump shaft according to claim 1,
the oil pump cover plate is internally provided with a concave part, and the concave part is in clearance fit with one end of the oil pump shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220555846.1U CN217055324U (en) | 2022-03-15 | 2022-03-15 | Oil pump structure with step oil pump shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220555846.1U CN217055324U (en) | 2022-03-15 | 2022-03-15 | Oil pump structure with step oil pump shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217055324U true CN217055324U (en) | 2022-07-26 |
Family
ID=82488703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220555846.1U Expired - Fee Related CN217055324U (en) | 2022-03-15 | 2022-03-15 | Oil pump structure with step oil pump shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217055324U (en) |
-
2022
- 2022-03-15 CN CN202220555846.1U patent/CN217055324U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |