A portable electric oil pump

Abstract

This application belongs to the technical field of oil pump equipment structure, specifically relating to a portable electric oil pump, including a main assembly, a liquid inlet assembly, and a liquid outlet assembly. The main assembly includes a housing and main pipes, an electrical control component, and a storage cylinder arranged in a staggered manner within the housing. The liquid inlet assembly includes a first connecting fastener and a liquid pumping component connected to each other. The liquid pumping component includes a motor and an impeller mounted on the output end of the motor. The liquid outlet assembly includes a second connecting fastener and a sensing component connected to each other. The sensing component includes a sensing housing and a sensing element located within the sensing housing. Both the liquid pumping component and the sensing component are electrically connected to the electrical control component. The sealed space formed by the storage cylinder is used to house the sensing component.

Description

Technical Field

[0001] This application belongs to the technical field of oil pump equipment structure, specifically relating to a portable electric oil pump. Background Technology

[0002] An oil pump is used to extract gasoline or diesel fuel from oil drums into vehicles, ships, or mechanical fuel systems for operation. Similarly, it can extract fuel from the fuel tanks of mechanical equipment to facilitate subsequent maintenance and repairs. Portable oil pumps are widely used in various scenarios. While existing portable oil pumps have improved in portability, they still have many limitations in practical applications:

[0003] On the one hand, the inlet and outlet pipes of traditional portable oil pumps are mostly fixed connections. When faced with different container diameters and liquid types, different types of oil pumps need to be manufactured according to the actual application.

[0004] On the other hand, the liquid dispensing process requires constant manual monitoring of the liquid level. Negligence can easily lead to liquid overflow, posing a safety hazard, especially when transferring flammable or corrosive liquids. Furthermore, existing equipment lacks dedicated storage structures for the dispensing components, which often have residual liquid. Random placement of these components can create safety hazards and also affect the overall cleanliness of the equipment.

[0005] Therefore, to meet the practical needs of liquid transfer in various scenarios, there is an urgent need for a portable oil pump that combines modularity, automatic liquid level control, and storage of liquid dispensing accessories. Furthermore, the modular design of the oil pump requires attention to prevent pipe detachment. Such devices can significantly improve the efficiency and safety of liquid transfer while optimizing the user experience, better adapting to the core requirements for flexible liquid transfer in scenarios such as home, outdoor, and laboratory settings. Summary of the Invention

[0006] The purpose of this application is to provide a portable electric oil pump that addresses the shortcomings of existing technologies. In practical applications, it features modularity, automatic liquid level control, and storage for liquid outlet accessories. Furthermore, the various connecting fasteners prevent the pipes from easily detaching.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A portable electric oil pump, comprising:

[0009] The main assembly includes a housing and main pipes, electrical control components and storage cylinders arranged in a staggered manner within the housing;

[0010] The liquid inlet assembly includes a first connecting fastener and a liquid pumping assembly that are interconnected. The first connecting fastener is connected to the liquid inlet of the main pipe through a liquid inlet pipe. The liquid pumping assembly includes a motor and an impeller installed at the output end of the motor.

[0011] The liquid dispensing assembly includes a second connecting fastener and a sensing component that are interconnected. The second connecting fastener is connected to the liquid outlet of the main pipe through a liquid dispensing pipe. The sensing component includes a sensing housing and a sensing element located inside the sensing housing.

[0012] The liquid inlet pipe is connected to the main pipe via a third connecting fastener, and the liquid outlet pipe is connected to the main pipe via a fourth connecting fastener. The liquid extraction component and the sensing component are both electrically connected to the electronic control component. The sealed space formed by the storage cylinder is used to house the sensing component.

[0013] As an improvement to the portable electric oil pump described in this application, an anti-siphon assembly is installed on the main pipe. The anti-siphon assembly includes a venting element disposed on the main pipe and a venting valve matched and installed with the venting element. The venting element is configured as a cylindrical structure that communicates with the main pipe and protrudes relative to the main pipe. The venting valve is located inside the venting element and is configured as a conical structure. The venting valve includes a venting end and a closing end, with the closing end facing the inner cavity of the main assembly.

[0014] As an improvement to the portable electric oil pump described in this application, the anti-siphon assembly further includes a vent cap, which is fitted onto the venting component and has a vent hole.

[0015] As an improvement to the portable electric oil pump described in this application, the third connecting fastener is externally fitted with a connecting flange. The first, second, third, and fourth connecting fasteners have the same structure, each including a fastener body and a sleeve body. The fastener body includes a column and a boss connected to each other. The column is formed by two semi-circular rings fastening together. The sleeve body is fitted onto the column body and abuts against the boss. Ribs are provided outside the column body, and ring grooves for placing the ribs are provided inside the sleeve body.

[0016] As an improvement to the portable electric oil pump described in this application, the outlet pipe and the inlet pipe are configured as rigid pipe structures or flexible pipe structures, and the exterior of the outlet pipe, the exterior of the inlet pipe, and the interior of the buckle body are provided with corresponding corrugated structures.

[0017] As an improvement to the portable electric oil pump described in this application, the pumping assembly further includes a pumping housing, in which the motor and the impeller are both disposed. The impeller and a portion of the pumping housing surrounding the impeller form a pressure chamber. A suction port is provided at the bottom of the pressure chamber, and the center point of the suction port is on the same straight line as the center point of the impeller.

[0018] As an improvement of the portable electric oil pump described in this application, the end of the sensing housing away from the main body assembly is the liquid outlet end. The end of the sensing housing near the liquid outlet end is provided with a sensing space integrally formed therewith. The end of the sensing space near the liquid outlet end is provided with an open structure. The sensing space near the open structure is provided with a sensing through hole. The sensing element is fixed in the sensing space and is left at a distance from the liquid outlet end. The sensing element is correspondingly arranged with the sensing through hole.

[0019] As an improvement of the portable electric oil pump described in this application, the sensing space includes a cylinder and a cover covering one end of the cylinder. The cylinder part overlaps with the sensing housing. The cover is located at the end of the cylinder away from the liquid outlet end. The cover is provided with a mounting hole for mounting the sensing element. The sensing through hole is located in the housing part shared by the cylinder and the sensing housing. The end of the sensing through hole near the liquid outlet end is configured as an open structure. The opening of the sensing through hole overlaps with the opening part of the liquid outlet end.

[0020] As an improvement to the portable electric oil pump described in this application, the liquid outlet assembly further includes an integrally formed oil cap and a connecting rope. A connecting hole is provided on the outside of the sensing housing. The end of the connecting rope away from the oil cap is fixed to the connecting hole. The oil cap is matched with the liquid outlet end.

[0021] As an improvement to the portable electric oil pump described in this application, the electronic control assembly includes a circuit board and a button and a power supply port electrically connected to the circuit board. A button matching the button is installed on the housing, and the power supply port is partially exposed outside the housing. The power supply port is provided with a dustproof pad.

[0022] The beneficial effects of this application are as follows:

[0023] 1. The portable electric oil pump of this application, through its modular structural design of the inlet assembly, main body assembly and outlet assembly, enables specialized division of labor in actual production. At the same time, it can also select different inlet and outlet pipes for matching and assembly according to different usage scenarios, eliminating the need to produce different types of overall oil pumps for different usage scenarios. This greatly reduces the production costs caused by changes in pipe type, reduces the time and cost of mold replacement, production line debugging and other links, and when the market needs a specific type of pipe, the production of that pipe module can be quickly organized without affecting the normal production of other oil pump modules. This ensures that users can be provided with suitable replacement pipes in a timely manner, enhancing production flexibility and market competitiveness.

[0024] 2. The liquid dispensing assembly in this application is equipped with a sensing component, which eliminates the need for manual monitoring of the liquid dispensing volume. When the liquid in the container reaches the set height, the sensing element can control the main assembly to stop working, thereby reducing safety hazards.

[0025] 3. Each connecting fastener in this application can exert a continuous radial clamping force on the inlet or outlet pipe, thereby preventing it from falling off.

[0026] 4. The main assembly in this application is equipped with a storage tube for placing the sensing components, which can reduce the possibility of liquid contamination while ensuring the overall cleanliness of the oil pump. Attached Figure Description

[0027] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the main assembly in the embodiment of this application (part of the housing is missing).

[0030] Figure 3 This is an exploded view of the main pipe and anti-siphon assembly in the embodiment of this application.

[0031] Figure 4 This is a structural diagram of the vent valve in the embodiment of this application.

[0032] Figure 5 This is an exploded view of the first connecting fastener in the embodiments of this application.

[0033] Figure 6 This is an exploded view of the liquid extraction component in the embodiments of this application.

[0034] Figure 7This is a schematic diagram of the liquid discharge assembly in the embodiment of this application.

[0035] Figure 8 This is a schematic diagram of the structure of the sensing component in the embodiment of this application (without sensing elements).

[0036] The reference numerals in the attached figures are explained as follows:

[0037] 1. Main assembly; 11. Housing; 111. Button; 12. Main pipe; 13. Electrical control components; 131. Circuit board; 132. Button; 133. Power supply port; 134. Dustproof pad; 14. Storage cylinder; 15. Anti-siphon assembly; 151. Vent component; 152. Vent valve; 1521. Vent end; 1522. Closed end; 153. Vent cap; 1531. Vent hole;

[0038] 2. Liquid inlet assembly; 21. First connecting fastener; 22. Liquid suction assembly; 221. Motor; 222. Impeller; 223. Liquid suction housing; 224. Suction port;

[0039] 3. Liquid inlet pipe;

[0040] 4. Liquid dispensing assembly; 41. Second connecting fastener; 42. Sensing component; 421. Sensing housing; 4211. Connecting hole; 422. Sensing element; 423. Sensing space; 4231. Sensing through hole; 4232. Cylinder; 4233. Cover; 4234. Mounting hole; 43. Oil cap; 44. Connecting rope;

[0041] 5. Liquid outlet pipe;

[0042] 6. Third connecting fastener; 61. Connecting flange;

[0043] 7. Fourth connecting fastener;

[0044] 81. Buckle body; 811. Column body; 8111. Rib bar; 812. Boss; 82. Sleeve body; 821. Ring rib groove. Detailed Implementation

[0045] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error. Furthermore, terms such as "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] The following is in conjunction with the appendix Figures 1-8 The present application will be further described in detail with reference to specific implementation methods, but this is not intended to limit the present application.

[0049] Implementation

[0050] A portable electric oil pump includes a main body assembly 1, an inlet assembly 2, and an outlet assembly 4. The inlet assembly 2 is connected to the main body assembly 1 via an inlet pipe 3, and the outlet assembly 4 is connected to the main body assembly 1 via an outlet pipe 5.

[0051] In this embodiment, both the inlet pipe 3 and the outlet pipe 5 adopt a flexible pipe structure. It is understood that the inlet pipe 3 and the outlet pipe 5 can also adopt pipe structures of other materials according to actual needs, such as rigid pipe structures. That is, since the main assembly 1, the inlet assembly 2 and the outlet assembly 4 in this embodiment can each form a module for use independently, specialized division of labor can be achieved in actual production. At the same time, different inlet pipes 3 and outlet pipes 5 can be selected for matching and assembly during production according to different usage scenarios. There is no need to produce different types of integrated oil pumps for different usage scenarios, which greatly reduces the production costs caused by changes in pipe type, reduces the time and cost of mold replacement, production line debugging and other links, and when the market needs a specific type of pipe, the production of that pipe module can be quickly organized without affecting the normal production of other oil pump modules, ensuring that users can be provided with suitable replacement pipes in a timely manner, enhancing production flexibility and market competitiveness.

[0052] Specifically, the main assembly 1 includes a housing 11 and a main pipe 12, an electrical control component 13, and a storage cylinder 14 arranged interlaced within the housing 11. An anti-siphon component 15 is installed on the main pipe 12. The anti-siphon component 15 includes a venting component 151 installed on the main pipe 12 and a venting valve 152 installed in conjunction with the venting component 151. The venting component 151 is configured as a cylindrical body 4232 structure that communicates with the main pipe 12 and protrudes relative to the main pipe 12. The venting valve 152 is located inside the venting component 151 and is configured as a conical structure. The venting valve 152 includes a venting end 1521 and a closing end 1522. The closing end 1522 faces the inner cavity of the main assembly 1.

[0053] In practical applications, the vent valve 152 is configured as a normally closed, inwardly opening, one-way soft rubber valve. When the oil pump motor stops working, the liquid in the flow passage will generate negative pressure due to gravity. At this time, the atmospheric pressure outside the vent valve 152 will be greater than the negative pressure inside the vent valve 152, and the valve will open to allow gas to enter the flow passage. This disconnects the flow passage and avoids siphoning, thus preventing the liquid in the liquid container after suction from being sucked back to the original container by the liquid inlet assembly 2, ensuring the normal operation of the oil pump. When the pump motor starts working, due to the pressure in the flow passage, the liquid pressure inside the vent valve 152 is greater than the atmospheric pressure outside the machine, causing the valve to close tightly, thus preventing liquid leakage.

[0054] In other technical solutions, the vent valve 152 can also be configured as a two-way vent valve according to actual needs. The two-way vent valve allows gas or liquid to flow in both directions, which provides greater flexibility and can meet more application requirements. In addition, the two-way vent valve can better control the flow of gas or liquid and can adjust the flow direction as needed, thereby improving the efficiency of the system.

[0055] In this embodiment, the anti-siphon assembly 15 also includes a vent cap 153, which is sleeved on the venting component 151. The vent cap 153 is provided with a vent hole 1531. The function of the vent cap 153 is to prevent gas or other substances from leaking at the interface, thereby increasing the overall airtightness of the equipment. It is understood that the vent cap 153 structure can be omitted in some other technical solutions where airtightness requirements are not high.

[0056] Specifically, the electrical components in the liquid inlet assembly 2 and the liquid outlet assembly 4 are all connected to the electronic control assembly 13. It is understood that, in order to more clearly illustrate the structural relationship between the components, the wires used for connecting the electrical components are omitted in the attached drawings. The electronic control assembly 13 includes a circuit board 131 and a button 132 and a power supply port 133 that are electrically connected to the circuit board 131. A button 111 matching the button 132 is installed on the housing 11. The power supply port 133 is partially exposed outside the housing 11 and is provided with a dustproof pad 134.

[0057] In other technical solutions, the power supply port 133 can be configured with multiple options, such as: a TYPE-C standard interface, suitable for power banks, portable energy storage devices, car USB interfaces, etc.; or a DC interface, suitable for car batteries, car cigarette lighter interfaces, household batteries, portable energy storage devices, etc.; or it can adopt multiple power supply methods such as dry cell batteries to increase the convenience and compatibility of the product for outdoor use.

[0058] Specifically, the sealed space formed by the receiving cylinder 14 is used to house the liquid outlet assembly 4. When placed inside the receiving cylinder, residual oil in the liquid outlet assembly 4 will settle inside the cylinder, preventing oil from contaminating other parts or splashing into the environment. This reduces the possibility of liquid contamination while ensuring the overall cleanliness of the oil pump. Understandably, in some technical solutions, the opening of the receiving cylinder 14 is designed with ribs to hold the liquid outlet assembly 4 in place, making it difficult to remove.

[0059] Specifically, the inlet pipe 3 is connected to the main pipe 12 via a third connecting fastener 6, and a connecting flange 61 is fitted onto the outside of the third connecting fastener 6. The outlet pipe 5 is connected to the main pipe 12 via a fourth connecting fastener 7. The first connecting fastener 21, the second connecting fastener 41, the third connecting fastener 6, and the fourth connecting fastener 7 have the same structure, all including a fastener body 81 and a sleeve body 82. The fastener body 81 includes a column 811 and a boss 812 that are connected to each other. The column 811 is fastened by two semi-circular rings. The components are assembled, with the sleeve 82 fitted onto the column 811 and abutting against the boss 812. The column 811 is provided with ribs 8111 on the outside, and the sleeve 82 is provided with annular grooves 821 for placing the ribs 8111 inside. The sleeve 82 can prevent detachment and provide radial clamping force to the ring, which plays a continuous radial pressing role in sealing the inlet pipe 3 or outlet pipe 5, ensuring the firmness of the connection between components. Thus, while maintaining the overall modularity of the oil pump, it can also ensure the normal operation of the oil pump.

[0060] In this embodiment, the outer side of the liquid outlet pipe 5, the outer side of the liquid inlet pipe 3, and the inner side of the buckle body 81 are provided with corresponding corrugated structures, which can further increase the connection firmness. It is understood that in some other technical solutions, the liquid outlet pipe 5 and the liquid inlet pipe 3 adopt a smooth pipe structure on the outside, and in this case, the inner side of the buckle body 81 does not need to be provided with a corresponding corrugated structure.

[0061] Specifically, the liquid inlet assembly 2 includes a first connecting fastener 21 and a liquid suction assembly 22 that are interconnected. The first connecting fastener 21 is connected to the liquid inlet of the main pipe 12 through the liquid inlet pipe 3. The liquid suction assembly 22 is electrically connected to the electrical control assembly 13. The liquid suction assembly 22 includes a motor 221, a liquid suction housing 223, and an impeller 222 installed at the output end of the motor 221. Both the motor 221 and the impeller 222 are located inside the liquid suction housing 223. The impeller 222 and the part of the liquid suction housing 223 surrounding the impeller 222 form a pressure chamber. A suction port 224 is provided at the bottom of the pressure chamber. The center point of the suction port 224 is on the same straight line as the center point of the impeller 222, which can maximize the suction function of the impeller 222 and ensure the normal implementation of the suction action.

[0062] Specifically, the liquid dispensing assembly 4 includes a second connecting fastener 41 and a sensing component 42 connected to each other. The second connecting fastener 41 is connected to the liquid outlet of the main body pipe 12 through the liquid dispensing pipe 5. The sensing component 42 is electrically connected to the electronic control component 13. The sensing component 42 includes a sensing housing 421 and a sensing element 422 located inside the sensing housing 421. The end of the sensing housing 421 away from the main body assembly 1 is the liquid dispensing end. The end of the sensing housing 421 near the liquid dispensing end is provided with a sensing space 423 integrally formed therewith. The end of the sensing space 423 near the liquid dispensing end is set as an open structure. The sensing space 423 near the open structure is provided with a sensing through hole 4231. The sensing element 422 is fixed in the sensing space 423 and is left with a gap between it and the liquid dispensing end. The sensing element 422 and the sensing through hole 4231 are correspondingly arranged. The sensing space 423 includes a cylinder 4232 and a cover 4233 covering one end of the cylinder 4232. The cylinder 4232 partially overlaps with the sensing housing 421. The cover 4233 is located at the end of the cylinder 4232 away from the liquid outlet end. The cover 4233 is provided with a mounting hole 4234 for installing the sensing element 422. The sensing through hole 4231 is located in the housing 11 part shared by the cylinder 4232 and the sensing housing 421. The end of the sensing through hole 4231 near the liquid outlet end is set as an open structure. The opening of the sensing through hole 4231 coincides with the opening of the liquid outlet end, which can reduce the probability of oil sticking to the hole wall of the sensing through hole 4231.

[0063] In actual use, there is no need for manual monitoring of the liquid output. When the liquid level in the container reaches the set height, the sensing element 422 can control the main assembly 1 to stop working through its connected electronic control component 13, reducing safety hazards. It is understood that the liquid output assembly 4 is placed at the top of the container, and the sensing space 423 has a sealed end relative to the inlet of the sensing element 42. When the set oil volume is not reached, the oil flowing normally through the sensing space 423 cannot be detected by the sensing element 422. Only after reaching the set oil volume does the oil enter the sensing space 423 through the sensing through-hole 4231 and be detected by the sensing element 422, which then controls the main assembly 1 to stop working through its connected electronic control component 13.

[0064] Specifically, the liquid outlet assembly 4 also includes an oil cap 43 and a connecting rope 44. In this embodiment, the oil cap 43 and the connecting rope 44 are integrally formed and made of a soft gel material for easy use. A connecting hole 4211 is provided on the outside of the sensing housing 421. The end of the connecting rope 44 away from the oil cap 43 is fixed to the connecting hole 4211. The oil cap 43 is matched with the liquid outlet end and covers it when the oil pump stops working to further prevent oil leakage. It is understood that in some other technical solutions, when the storage cylinder 14 can meet its cleanliness requirements, the oil cap 43 and the connecting rope 44 can be omitted.

[0065] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0066] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this application is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this application are within the scope of protection of this application. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this application.

Claims

1. A portable electric oil pump, characterized in that, include: The main assembly (1) includes a housing (11) and main pipes (12), electrical control components (13) and storage cylinders (14) arranged interlaced within the housing (11). The liquid inlet assembly (2) includes a first connecting fastener (21) and a liquid pumping assembly (22) connected to each other. The first connecting fastener (21) is connected to the liquid inlet of the main pipe (12) through the liquid inlet pipe (3). The liquid pumping assembly (22) includes a motor (221) and an impeller (222) installed at the output end of the motor (221). The liquid discharge assembly (4) includes a second connecting fastener (41) and a sensing component (42) connected to each other. The second connecting fastener (41) is connected to the liquid outlet of the main pipe (12) through the liquid discharge pipe (5). The sensing component (42) includes a sensing housing (421) and a sensing element (422) located inside the sensing housing (421). The liquid inlet pipe (3) is connected to the main pipe (12) via the third connecting fastener (6), the liquid outlet pipe (5) is connected to the main pipe (12) via the fourth connecting fastener (7), the liquid extraction component (22) and the sensing component (42) are both electrically connected to the electronic control component (13), and the sealed space formed by the storage cylinder (14) is used to place the sensing component (42).

2. The portable electric oil pump as described in claim 1, characterized in that, The third connecting fastener (6) is fitted with a connecting flange (61). The first connecting fastener (21), the second connecting fastener (41), the third connecting fastener (6) and the fourth connecting fastener (7) have the same structure, each including a fastener body (81) and a sleeve body (82). The fastener body (81) includes a column (811) and a boss (812) connected to each other. The column (811) is formed by two semi-circular rings fastened together. The sleeve body (82) is fitted on the column (811) and abuts against the boss (812). The column (811) is provided with a rib (8111) on the outside. The sleeve body (82) is provided with a ring rib groove (821) for placing the rib (8111) inside.

3. The portable electric oil pump as described in claim 1, characterized in that, An anti-siphon assembly (15) is installed on the main pipe (12). The anti-siphon assembly (15) includes a venting element (151) disposed on the main pipe (12) and a venting valve (152) matched and installed with the venting element (151). The venting element (151) is configured as a cylindrical body (4232) structure that communicates with the main pipe (12) and protrudes relative to the main pipe (12). The venting valve (152) is located inside the venting element (151) and is configured as a conical structure. The venting valve (152) includes a venting end (1521) and a closing end (1522). The direction of the closing end (1522) is towards the inner cavity of the main assembly (1).

4. The portable electric oil pump as described in claim 3, characterized in that, The anti-siphon assembly (15) also includes a vent cap (153), which is fitted onto the venting component (151) and has a vent hole (1531).

5. The portable electric oil pump as described in claim 2, characterized in that, The liquid outlet pipe (5) and the liquid inlet pipe (3) are configured as rigid pipe structures or flexible pipe structures. Corresponding corrugated structures are provided on the outside of the liquid outlet pipe (5), the outside of the liquid inlet pipe (3), and the inside of the buckle body (81).

6. The portable electric oil pump as described in claim 1, characterized in that, The liquid extraction assembly (22) also includes a liquid extraction housing (223). The motor (221) and the impeller (222) are both disposed inside the liquid extraction housing (223). The impeller (222) and a portion of the liquid extraction housing (223) surrounding the impeller (222) form a pressure chamber. A suction port (224) is provided at the bottom of the pressure chamber. The center point of the suction port (224) and the center point of the impeller (222) are located on the same straight line.

7. The portable electric oil pump as described in claim 1, characterized in that, The end of the sensing housing (421) away from the main body assembly (1) is the liquid outlet end. The end of the sensing housing (421) near the liquid outlet end is provided with a sensing space (423) integrally formed therewith. The end of the sensing space (423) near the liquid outlet end is provided with an open structure. The sensing space (423) near the open structure is provided with a sensing through hole (4231). The sensing element (422) is fixed in the sensing space (423) and is spaced apart from the liquid outlet end. The sensing element (422) is provided correspondingly to the sensing through hole (4231).

8. The portable electric oil pump as described in claim 7, characterized in that, The sensing space (423) includes a cylindrical body (4232) and a cover (4233) covering one end of the cylindrical body (4232). The cylindrical body (4232) partially overlaps with the sensing housing (421). The cover (4233) is located at the end of the cylindrical body (4232) away from the liquid outlet end. The cover (4233) is provided with a mounting hole (4234) for mounting the sensing element (422). The sensing through hole (4231) is located in the housing (11) part shared by the cylindrical body (4232) and the sensing housing (421). The end of the sensing through hole (4231) near the liquid outlet end is set as an open structure. The opening of the sensing through hole (4231) overlaps with the opening of the liquid outlet end.

9. The portable electric oil pump as described in claim 7, characterized in that, The liquid outlet assembly (4) also includes an integrally formed oil cap (43) and a connecting rope (44). A connecting hole (4211) is provided on the outside of the sensing housing (421). One end of the connecting rope (44) away from the oil cap (43) is fixed to the connecting hole (4211). The oil cap (43) is matched with the liquid outlet end.

10. The portable electric oil pump as described in claim 1, characterized in that, The electronic control component (13) includes a circuit board (131), a button (132) electrically connected to the circuit board (131), and a power supply port (133). A button (111) matching the button (132) is installed on the housing (11). The power supply port (133) is partially exposed outside the housing (11) and is provided with a dustproof pad (134).

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