CN218293853U - Shaft hole positioning structure capable of improving transmission precision of oil pump - Google Patents
Shaft hole positioning structure capable of improving transmission precision of oil pump Download PDFInfo
- Publication number
- CN218293853U CN218293853U CN202222262121.6U CN202222262121U CN218293853U CN 218293853 U CN218293853 U CN 218293853U CN 202222262121 U CN202222262121 U CN 202222262121U CN 218293853 U CN218293853 U CN 218293853U
- Authority
- CN
- China
- Prior art keywords
- oil pump
- positioning
- boss
- hole
- oil
- 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.)
- Active
Links
Images
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The shaft hole positioning structure comprises a boss arranged on the engine oil pump and a positioning hole correspondingly arranged on an engine cylinder body, wherein the boss is positioned on a mounting surface of the engine oil pump and coaxially aligned with a pump shaft of the engine oil pump, the boss can be inserted into the positioning hole to form fit, the engine oil pump is also provided with a positioning surface used for matching an installation tool, and the positioning surface is perpendicular to the mounting surface of the engine oil pump in space. The utility model discloses the positioning cost is lower and can improve the transmission precision of machine oil pump.
Description
Technical Field
The utility model belongs to the technical field of the oil pump technique and specifically relates to indicate a can improve shaft hole location structure of oil pump transmission precision.
Background
The oil pump is used as an important component of an engine system, generally needs to be assembled with an engine cylinder body and is fastened and connected with the engine cylinder body, the oil pump and the engine cylinder body are firstly positioned in the assembling process, and a positioning pin or a positioning sleeve is generally designed on an installation surface of the oil pump in a traditional positioning mode, and a positioning hole and other structures are correspondingly arranged on the engine cylinder body. The disadvantages of this positioning method are: on one hand, the positioning structure is more, which leads to the increase of the cost of the product; on the other hand, the transmission precision requirement of the oil pump and the engine is high, the transmission of the oil pump is driven by the pump shaft, and a certain deviation easily exists in the traditional positioning mode, so that the positioning of the pump shaft is not accurate enough, and the transmission precision is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the shortcoming of above-mentioned prior art, provide a location cost is lower and can improve the shaft hole location structure of oil pump transmission precision.
In order to solve the technical problem, the utility model discloses a following technical scheme: a shaft hole positioning structure capable of improving transmission precision of an oil pump comprises a boss arranged on the oil pump and a positioning hole correspondingly arranged on an engine cylinder body, wherein the boss is positioned on a mounting surface of the oil pump and coaxially aligned with a pump shaft of the oil pump, the boss can be inserted into the positioning hole to form matching, the oil pump is also provided with a positioning surface used for matching a mounting tool, and the positioning surface is perpendicular to the mounting surface of the oil pump in space.
Furthermore, an oil discharge hole communicated with an oil pump shaft hole is arranged in the center of the boss in a penetrating mode, and a through hole capable of communicating the oil discharge hole with an engine oil pan is arranged at the bottom end of the positioning hole.
The oil pump shaft hole, the oil discharge hole and the through hole are coaxially aligned.
Preferably, the boss is a cylindrical boss.
More preferably, the boss and the oil pump are of an integrally formed structure.
The boss on the oil pump is inserted into the positioning hole of the engine cylinder body to form matching, and the oil pump positioning surface and the engine cylinder body are assembled by the assembling machine to limit the oil pump to rotate around the shaft, so that the oil pump can be quickly positioned, excessive positioning pin and positioning hole structures do not need to be arranged on the oil pump and the engine cylinder body, and the positioning cost is reduced; in addition, the boss is coaxially aligned with a pump shaft of the oil pump, the boss structure is equivalent to the extension of a shaft hole of the oil pump, and the transmission of the oil pump is driven by the pump shaft, so that the boss is accurately positioned, the positioning accuracy of the pump shaft of the oil pump can be ensured, and compared with the traditional positioning mode, the transmission positioning of the oil pump is not easy to deviate, and the transmission precision is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the oil pump and the engine cylinder body in the embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an engine oil pump according to an embodiment of the present invention;
fig. 3 is a schematic view of a partial structure of an engine block according to an embodiment of the present invention.
In the figure:
1-oil pump 2-boss 3-engine cylinder
4-positioning hole 5-pump shaft 6-positioning surface
7-oil drain hole 8-through hole.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
It should be noted that, in the present invention, unless otherwise explicitly stated or limited, terms such as "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween.
As shown in fig. 1-3, a shaft hole positioning structure capable of improving transmission accuracy of an oil pump includes a boss 2 disposed on an oil pump 1 and a positioning hole 4 correspondingly disposed on an engine cylinder 3, the boss 2 is disposed on a mounting surface of the oil pump 1 and coaxially aligned with a pump shaft 5 of the oil pump 1, the boss 2 can be inserted into the positioning hole 4 to form a fit, the oil pump 1 is further provided with a positioning surface 6 for fitting a tool of an assembly machine, and the positioning surface 6 is spatially perpendicular to a mounting surface of the oil pump 1.
Furthermore, an oil discharge hole 7 communicated with the shaft hole of the oil pump 1 is arranged in the center of the boss 2 in a penetrating mode, and a through hole 8 capable of communicating the oil discharge hole 7 with an engine oil pan is arranged at the bottom end of the positioning hole 4. Wherein, the oil pump 1 shaft hole, the oil discharge hole 7 and the through hole 8 are coaxially aligned. Therefore, in the working process of the engine oil pump, pressure oil in the pump cavity can be smoothly discharged through the shaft hole, the oil discharge hole 7 and the through hole 8 and is leaked into the engine oil bottom shell to be collected, so that the impurities in the pressure oil and the oil liquid are not repeatedly concentrated in the gap between the shaft hole and the pump shaft, and the smoothness of the shaft hole lubrication of the engine oil pump is ensured.
Preferably, the boss 2 is a cylindrical boss, and the boss 2 and the oil pump 1 are in an integrally formed structure, so that the firmness and reliability of the structure of the boss 2 are ensured.
After the shaft hole positioning structure capable of improving the transmission precision of the oil pump is applied to the oil pump and the engine cylinder body, when the oil pump and the engine cylinder body are assembled and positioned, the boss 2 on the oil pump 1 is inserted into the positioning hole 4 of the engine cylinder body 3 to form matching, and meanwhile, the oil pump positioning surface 6 of the assembling machine and the engine cylinder body 3 are utilized to limit the rotation of the oil pump 1 around the pump shaft 5, so that the oil pump 1 can be quickly positioned.
The oil pump 1 and the engine cylinder 3 are positioned through the structure, and excessive positioning pin and positioning hole structures are not required to be arranged on the oil pump 1 and the engine cylinder 3, so that the positioning cost is reduced; in addition, the boss 2 is coaxially aligned with the pump shaft of the oil pump 1, the structure of the boss 2 is equivalent to the extension of the shaft hole of the oil pump, and the transmission of the oil pump is driven by the pump shaft 5, so that the boss 2 can be accurately positioned and the positioning accuracy of the pump shaft 5 of the oil pump can be ensured, and compared with the traditional positioning mode, the transmission positioning of the oil pump is not easy to deviate, and the transmission precision is improved.
In the embodiment, specifically disclose is a vane pump, boss 2 sets up on the installation face of the pump body, and the one end of pump shaft 5 stretches out from the pump cover and connects drive gear, when boss 2 and locating hole 4 of engine cylinder block 3 formed the cooperation like this, directly just ensured that pump shaft 5 is also in accurate location to the drive gear of having guaranteed on the pump shaft 5 can be accurate mesh with engine power output gear, improved the transmission precision. In the traditional positioning assembly mode, because the positioning pins and the positioning holes are distributed at all parts of the oil pump, certain deviation can occur to a pump shaft in the middle of the oil pump due to errors among some positioning structures, and finally, the meshing precision between the transmission gear and the power output gear is insufficient in a vane pump like the vane pump.
More particularly, the matching formed by the boss 2 and the positioning hole 4 is also equivalent to a mounting point, and after the engine oil pump 1 and the engine cylinder body 2 are fastened and connected, the matching between the boss 2 and the positioning hole 4 can improve the overall rigidity of the engine oil pump 1 and the engine cylinder body 2 to a certain extent.
Besides the vane pump mentioned in the embodiment, the positioning structure can also be applied to positioning between any other type of oil pump and engine block, and the specific application is not described in detail, but as for the position where the boss 2 is arranged, it can be arranged on the pump cover instead of the pump body, and it is only necessary to ensure that the boss 2 is located on the mounting surface of the oil pump and the boss 2 is coaxially aligned with the pump shaft 5 of the oil pump 1.
In order to make the improvement of the present invention relative to the prior art more easily understood by those skilled in the art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiment is a preferred implementation of the present invention, and in addition, the present invention can be implemented in other ways, and any obvious replacement is within the protection scope of the present invention without departing from the concept of the present invention.
Claims (5)
1. Can improve shaft hole location structure of oil pump transmission precision, its characterized in that: the oil pump comprises a boss (2) arranged on an oil pump (1) and a positioning hole (4) correspondingly arranged on an engine cylinder body (3), wherein the boss (2) is positioned on an installation surface of the oil pump (1) and coaxially aligned with a pump shaft (5) of the oil pump (1), the boss (2) can be inserted into the positioning hole (4) to form matching, the oil pump (1) is further provided with a positioning surface (6) used for matching with an installation tool, and the positioning surface (6) is perpendicular to the installation surface of the oil pump (1) in space.
2. The shaft hole positioning structure capable of improving the transmission precision of the oil pump according to claim 1, characterized in that: an oil discharge hole (7) communicated with a shaft hole of the oil pump (1) is formed in the center of the boss (2) in a penetrating mode, and a through hole (8) capable of communicating the oil discharge hole (7) with an engine oil pan is formed in the bottom end of the positioning hole (4).
3. The shaft hole positioning structure capable of improving the transmission precision of the oil pump according to claim 2, characterized in that: the oil pump (1) is characterized in that the shaft hole, the oil discharge hole (7) and the through hole (8) are coaxially aligned.
4. The shaft hole positioning structure capable of improving the transmission precision of the oil pump according to claim 1, characterized in that: the boss (2) is a cylindrical boss.
5. The shaft hole positioning structure capable of improving the transmission precision of the oil pump according to claim 4, characterized in that: the boss (2) and the oil pump (1) are of an integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222262121.6U CN218293853U (en) | 2022-08-26 | 2022-08-26 | Shaft hole positioning structure capable of improving transmission precision of oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222262121.6U CN218293853U (en) | 2022-08-26 | 2022-08-26 | Shaft hole positioning structure capable of improving transmission precision of oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218293853U true CN218293853U (en) | 2023-01-13 |
Family
ID=84812292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222262121.6U Active CN218293853U (en) | 2022-08-26 | 2022-08-26 | Shaft hole positioning structure capable of improving transmission precision of oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218293853U (en) |
-
2022
- 2022-08-26 CN CN202222262121.6U patent/CN218293853U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN218293853U (en) | Shaft hole positioning structure capable of improving transmission precision of oil pump | |
| CN102261554A (en) | Rotor type oil pump | |
| CN201606243U (en) | Novel high-pressure gear pump | |
| CN2396209Y (en) | Inserted machine oil pump | |
| CN2818850Y (en) | Lubricating oil pump of gearbox | |
| CN208719808U (en) | A kind of rotor-type oil pump that can improve cavitation erosion | |
| CN201582107U (en) | Rotor lubricant pump directly transmitted by flat square of engine crankshaft | |
| CN220285975U (en) | Pump body structure of claw type hydrogen circulating pump | |
| CN103089619A (en) | Scroll compressor | |
| CN219865475U (en) | Direct-connection transmission type vacuum pump with integrated end cover | |
| CN220248347U (en) | External gear pump | |
| CN218000358U (en) | Lubricating structure applied to vertical speed reducer | |
| CN218757708U (en) | Rotary motor assembly of miniature excavator | |
| CN214837095U (en) | Split structure gear oil pump | |
| CN219388149U (en) | Oil pump device and vehicle | |
| CN208280999U (en) | The balance shaft timing drive mechanism of three-cylinder engine | |
| CN2211505Y (en) | Cam-rotor vane pump | |
| CN110701042B (en) | Electronic oil pump transmission structure | |
| CN217327663U (en) | Low-loss gear constant delivery pump suitable for large-range viscosity fluid | |
| CN114135462B (en) | Internal lubrication type plunger pump | |
| CN201206717Y (en) | Lubricating oil pump | |
| CN214741813U (en) | Hydraulic motor assembly and engineering machinery with same | |
| CN210860593U (en) | Oil pump, engine lubrication system and engine assembly | |
| CN217873248U (en) | Bidirectional compensation four-quadrant internal gear pump | |
| CN215890978U (en) | Integrated input mechanism for commutator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |