Portable oil well pump

Abstract

The utility model discloses a portable oil well pump which comprises a main machine, an oil pumping pipe, a pump body and an oil outlet pipe, a circuit board and a battery are arranged on the main machine, and the oil pumping pipe is connected with the main machine. The pump body comprises a waterproof cover arranged in the oil pumping pipe, a motor and an impeller, an oil passing channel is formed between the waterproof cover and the inner side wall of the oil pumping pipe, the motor is arranged in the waterproof cover, a rotating shaft of the motor penetrates out of the waterproof cover to be connected with the impeller, and the impeller is arranged close to the side, away from the main machine, of the oil pumping pipe. The motor is electrically connected with the circuit board through a wire, one end of the wire penetrates into the waterproof cover from the inside of the oil pumping pipe and then is electrically connected with the motor, and the other end of the wire penetrates into the host from the inside of the oil pumping pipe and then is electrically connected with the circuit board. A sealing gasket is arranged between the side, close to the impeller, of the motor and the waterproof cover, and a shaft rod of the motor penetrates through the sealing gasket. A first adhesive layer is arranged in the waterproof cover, the first adhesive layer covers the electric connection part of the electric wire and the motor, and / or the electric wire is in interference fit with the waterproof cover.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pumps, and in particular to a portable oil pump. Background Technology

[0002] As is well known, a portable oil pump refers to an electronic product that is easy for users to carry and use to transfer oil such as gasoline and diesel from one container to another. A portable oil pump generally includes a main unit, a suction pipe, and an outlet pipe. The main unit contains a circuit board, and the suction pipe contains the pump body. Currently, existing portable oil pumps generally include a motor and a fan connected to the motor. The motor is electrically connected to the circuit board via wires. The oil-proof seal at the connection between the wires and the motor is usually achieved by applying adhesive. However, gasoline and diesel can easily cause safety hazards when exposed to electrical sparks. While the adhesive method is simple, during pumping, the flow of oil can easily wash away the adhesive at the connection between the wires and the motor, causing the adhesive to loosen, resulting in a short-lasting seal and potential safety hazards. Utility Model Content

[0003] The main purpose of this utility model is to provide a portable oil pump to solve the problem that the sealing effect of the pump body and the electrical connection of the wires in the existing portable oil pump is not long due to the use of glue.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0005] A portable oil pump, comprising:

[0006] A host computer, wherein a circuit board and a battery electrically connected to the circuit board are provided on the host computer;

[0007] Oil extraction tubing, which is connected to the main unit;

[0008] The pump body is located inside the oil suction pipe at one end, away from the main unit.

[0009] And an oil outlet pipe, which is connected to and communicates with the oil extraction pipe near the main unit;

[0010] The pump body includes a waterproof cover, a motor, and an impeller housed within an oil extraction pipe. An oil passage is formed between the waterproof cover and the inner wall of the oil extraction pipe. The motor is housed within the waterproof cover, with its shaft extending through the cover and connecting to the impeller. The impeller is positioned closer to the oil extraction pipe and further away from the main unit. The motor is electrically connected to a circuit board via wires. One end of the wire passes through the oil extraction pipe into the waterproof cover and connects to the motor; the other end of the wire passes through the oil extraction pipe into the main unit and connects to the circuit board. A sealing gasket is provided between the motor and the waterproof cover on the side near the impeller, and the motor shaft passes through the sealing gasket. A first adhesive layer is provided inside the waterproof cover, covering the electrical connection between the wires and the motor, and / or the wires and the waterproof cover are press-fitted.

[0011] Furthermore, the waterproof cover has a wiring hole through which the wire passes; the waterproof cover includes an outer shell and a cover connected to the outer shell to form a first mounting cavity, and the motor and the sealing gasket are both disposed in the first mounting cavity;

[0012] The cover is located at the top of the housing, the sealing gasket is located on the side of the motor away from the cover, the motor shaft passes through the housing, and the wiring hole is located on the cover; or, the cover is located at or near the bottom of the housing, the sealing gasket is located on the side of the motor near the cover, the motor shaft passes through the cover, and the wiring hole is located on the housing.

[0013] Furthermore, an annular groove is provided on the inner side wall of the outer casing, and an annular block is formed outward along the cover to fit the annular groove, with the annular block placed inside the annular groove.

[0014] Furthermore, when the cover is located on top of the housing, the connection between the cover and the housing also forms a first glue-filling groove. The first glue-filling groove is located on the side of the annular block away from the first mounting cavity, and a second glue layer for sealing is poured into the first glue-filling groove.

[0015] Furthermore, when the cover is located on top of the housing, the motor is provided with a terminal block, the wire includes a conductive core and an insulating layer covering the outer wall of the conductive core, the terminal block is electrically connected to the conductive core, and the thickness of the first adhesive layer at least covers the terminal block and the conductive core protruding from one end of the insulating layer.

[0016] Furthermore, when the cover is located on top of the outer casing, the cover protrudes outward at the position corresponding to the wire to form a potting protrusion, the wiring hole passes through the potting protrusion, and the potting protrusion has a second potting groove communicating with the wiring hole on the side away from the first mounting cavity, and a third adhesive layer for sealing is poured into the second potting groove.

[0017] Furthermore, when the cover is located at or near the bottom of the housing, the waterproof cover also includes a seal and a waterproof film;

[0018] The top of the housing forms a raised enclosure and a receiving groove located within the raised enclosure. The wiring hole communicates with the receiving groove. The housing forms a retaining block between the receiving groove and the first mounting cavity. A retaining groove is provided on the outer side wall of the seal. The seal passes through the wiring hole. The retaining block is placed in the retaining groove. Part of the seal is placed in the receiving groove. The wire passes through the seal and is interference-fitted with the seal. The seal is interference-fitted with one or more of the side walls of the receiving groove and the side walls of the wiring hole.

[0019] The waterproof film is located between the motor and the seal, and the motor shaft passes through the cover and the waterproof film.

[0020] Furthermore, the inner wall of the oil extraction pipe has protrusions forming at least two spaced limiting ribs, the waterproof cover is interference-fitted with the limiting ribs, and the waterproof cover, the limiting ribs, and the inner wall of the oil extraction pipe form an oil passage.

[0021] Furthermore, each of the limiting ribs includes a first protrusion and a second protrusion connected to the first protrusion. The second protrusion and the first protrusion are stepped. The second protrusion is located below the first protrusion. A plurality of the second protrusions surround to form a second mounting cavity, and the waterproof cover is placed in the second mounting cavity.

[0022] Furthermore, the oil extraction tube includes: a tube body with an oil extraction channel, and a limiting cap connected to the tube body; the limiting cap has an oil inlet connected to the oil extraction channel, and the limiting rib is located on the tube body and is disposed at one end near the limiting cap.

[0023] This utility model has the following beneficial effects: Compared with the prior art, this utility model, by configuring a waterproof cover on the outside of the motor and configuring a sealing gasket between the motor shaft and the waterproof cover, prevents oil from entering the waterproof cover from the gap between the motor shaft and the waterproof cover. Combined with the first adhesive layer and / or the interference fit between the wire and the waterproof cover, it can effectively prevent the motor and the electrical connection between the wire and the motor from coming into contact with oil. The waterproof cover can effectively alleviate the scouring force of the first adhesive layer when the pump body is pumping oil. Furthermore, the interference fit between the waterproof cover and the wire, as well as the electrical connection between the wire and the motor, can effectively prevent the wire from being pulled when the oil flows, thereby improving the sealing timeliness and solving the problem of short oil-proof time caused by the existing method of using glue to prevent oil between the wire and the motor. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a perspective view of the present utility model;

[0026] Figure 2 This is a cross-sectional view of the present invention taken along the center of the oil extraction pipe;

[0027] Figure 3 for Figure 2 Enlarged view of region a in the middle;

[0028] Figure 4 for Figure 2 Enlarged view of region b in the middle;

[0029] Figure 5 for Figure 2 Enlarged view of region c in the middle;

[0030] Figure 6 This is a perspective view of a waterproof cover according to another embodiment of the present invention;

[0031] Figure 7 This is an exploded view of the pump body according to another embodiment of the present invention;

[0032] Figure 8 This is an exploded view of the oil extraction pipe of this utility model;

[0033] Figure 9 This is a perspective view of the main unit of this utility model;

[0034] Figure 10 This is an exploded view of the main unit of this utility model;

[0035] Figure 11 This is a cross-sectional view of another embodiment of the present invention, cut along the center of the sucker pipe after the oil outlet pipe has been removed;

[0036] Figure 12 for Figure 11 Enlarged view of region d in the middle;

[0037] Figure 13 for Figure 11 A magnified view of region e in the middle. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] See attached document Figure 1-13 A portable oil pump is described in this embodiment of the present invention.

[0040] The portable oil pump includes a main unit 1, an oil suction pipe 2, a pump body 5, and an oil outlet pipe 3. The main unit 1 is equipped with a circuit board 7 electrically connected to the pump body 5 and a battery 6 electrically connected to the circuit board 7. The oil suction pipe 2 is connected to the main unit 1. The pump body 5 is located inside the oil suction pipe 2 at one end away from the main unit 1. The oil outlet pipe 3 is connected to the oil suction pipe 2 near the main unit 1 and communicates with the oil suction pipe 2.

[0041] The pump body 5 includes a waterproof cover 57, a motor 53, and an impeller 54 housed inside the oil extraction pipe 2. An oil passage 206 for oil passage is formed between the waterproof cover 57 and the inner wall of the oil extraction pipe 2. The motor 53 is housed inside the waterproof cover 57, and its shaft passes through the inside of the waterproof cover 57 and is connected to the impeller 54. The impeller 54 is located on the side of the oil extraction pipe 2 away from the main unit 1. The motor 53 is electrically connected to the circuit board 7 via a wire 50. One end of the wire 50 passes through the inside of the oil extraction pipe 2, enters the waterproof cover 57, and is electrically connected to the motor 53. The other end of the wire 50 passes through the inside of the oil extraction pipe 2, enters the main unit 1, and is electrically connected to the circuit board 7.

[0042] A sealing gasket 55 is provided between the motor 53 and the waterproof cover 57 on the side near the impeller 54, and the shaft of the motor 53 passes through the sealing gasket 55. A first adhesive layer 530 is provided inside the waterproof cover 57, which covers the electrical connection between the wire 50 and the motor 53, and / or the wire 50 and the waterproof cover 57 are interference-fitted.

[0043] This invention provides a waterproof cover 57 on the outside of the motor 53, and a sealing gasket 55 between the point where the motor 53's shaft passes through and the waterproof cover 57. This prevents oil from entering the waterproof cover 57 through the gap between the motor 53's shaft and the waterproof cover 57. Combined with the interference fit between the first adhesive layer 530 and / or the wire 50 and the waterproof cover 57, this effectively prevents oil from contacting the motor 53 and the electrical connection between the wire 50 and the motor 53. The waterproof cover 57 effectively alleviates the scouring force of the first adhesive layer 530 when the pump body 5 is pumping oil. Furthermore, the interference fit between the waterproof cover 57 and the wire 50, as well as the electrical connection between the wire 50 and the motor 53, effectively prevents the wire 50 from being pulled during oil flow, thereby improving the sealing time and solving the problem of short oil-proofing time caused by the existing method of using adhesive to prevent oil from the wire 50 and the motor 53.

[0044] Furthermore, an oil passage 206 is formed between the waterproof cover 57 and the inner wall of the oil extraction pipe 2 for oil passage. When the circuit board 7 drives the motor 53, the rotating shaft of the motor 53 drives the impeller 54 to rotate. The oil passes through the oil inlet 241 of the oil extraction pipe 2 and the oil extraction pipe 2, and is then sent out from the oil outlet pipe 3 to achieve the function of oil extraction.

[0045] Specifically, the wire 50 is inserted into the main unit 1. The wire 50 and the main unit 1 are sealed by means of interference fit or by dispensing adhesive, so as to prevent oil from entering the main unit 1 from the gap between the wire 50 and the main unit 1.

[0046] The waterproof cover 57 has a wiring hole 514 through which the wire 50 passes. The waterproof cover 57 includes a housing 52 and a cover 51 connected to the housing 52 to form a first mounting cavity 58. The motor 53 and the sealing gasket 55 are both disposed in the first mounting cavity 58.

[0047] In one embodiment, to facilitate the connection between the outer shell 52 and the cover 51, an annular groove 521 is provided on the inner sidewall of the outer shell 52, and an annular locking block 512 adapted to the annular groove 521 is formed outward from the cover 51, with the annular locking block 512 placed inside the annular groove 521. Of course, in other embodiments, the outer shell 52 and the cover 51 can also be connected by means of threads, interference fit, snap fasteners, etc.

[0048] In one embodiment, the sealing gasket 55 is located on the side of the motor 53 away from the cover 51, and the cover 51 is located on the side of the motor 53 closer to the main unit 1. The shaft of the motor 53 passes through the housing 52, as shown below. Figure 4-7 As shown. The cover 51 has a wiring hole 514. The wire 50 passes through the wiring hole 514. With the first adhesive layer 530 and / or the wire 50 and the waterproof cover 57, the sealing of the motor 53 and the electrical connection between the wire 50 and the motor 53 can be guaranteed, and the problem of safety hazards caused by the contact between the motor 53 and the electrical connection between the wire 50 and the motor 53 and oil can be avoided.

[0049] The connection between the cover 51 and the outer shell 52 can also form a first glue-filling groove 540. The first glue-filling groove 540 is located on the side of the annular locking block 512 away from the first mounting cavity 58. A second glue layer 520 for sealing is poured into the first glue-filling groove 540. The second glue layer 520 is formed by glue being poured into the first glue-filling groove 540 and then solidifying. This fills the gap between the outer wall of the cover 51 and the inner wall of the outer shell 52, achieving a seal between the outer wall of the cover 51 and the inner wall of the outer shell 52, and preventing oil from entering from the gap between the outer wall of the cover 51 and the inner wall of the outer shell 52.

[0050] The motor 53 is provided with a terminal block 531. The wire 50 includes a conductive core 502 and an insulating layer 501 covering the outer wall of the conductive core 502. The terminal block 531 is electrically connected to the conductive core 502. The thickness of the first adhesive layer 530 at least covers the terminal block 531 and the conductive core 502 protruding from one end of the insulating layer 501 to prevent the conductive part from contacting oil. The interference fit between the wire 50 and the side wall of the wiring hole 514 and / or the second adhesive layer 520 effectively prevents the motor 53 and the electrical connection between the motor 53 and the wire 50 from contacting oil, thus providing an oil-proof function. Specifically, the conductive core 502 is made of copper.

[0051] In a further design, the cover 51 protrudes outward at the position corresponding to the wire 50 to form a potting protrusion 511. The wiring hole 514 passes through the potting protrusion 511. The potting protrusion 511 has a second potting groove 513 on the side away from the first mounting cavity 58, which communicates with the wiring hole 514. A third adhesive layer 5110 for sealing is poured into the second potting groove 513. The third adhesive layer 5110 is formed after the glue is injected into the second potting groove 513 to seal the gap between the wire 50 and the side wall of the wiring hole 514, and prevent oil from entering the waterproof cover 57 from the gap between the wire 50 and the side wall of the wiring hole 514.

[0052] In one embodiment, the cover 51 is located at or near the bottom of the housing 52, the sealing gasket 55 is located on the side of the motor 53 near the cover 51, the shaft of the motor 53 passes through the cover 51, and the wiring hole 514 is located on the housing 52, such as... Figure 6 , Figure 7 and Figures 11 to 13 As shown.

[0053] In this embodiment, the waterproof cover 57 further includes a sealing element 56 and a waterproof film 58. The top of the outer shell 52 forms a raised enclosure 522 and a receiving groove 523 located within the raised enclosure 522. The wiring hole 514 communicates with the receiving groove 523. The outer shell 52 forms a retaining block 524 between the receiving groove 523 and the first mounting cavity 58. A retaining groove 561 is provided on the outer side wall of the sealing element 56. The sealing element 56 passes through the wiring hole 514. The retaining block 524 is placed in the retaining groove 561, and part of the sealing element 56 is placed in the receiving groove 523. The wire 50 passes through the seal 56 and is press-fitted with it. The seal 56 is press-fitted with one or more of the side walls of the receiving groove 523 and the wiring hole 514 to seal the wire 50 to the housing 52. The upper and lower surfaces of the sealing gasket 55 abut against the cover 51 and the motor 53 respectively. The outer side wall of the sealing gasket 55 is press-fitted with the housing 52 to seal the entire waterproof cover 57. A waterproof film 58 is located between the motor 53 and the seal 56. The shaft of the motor 53 passes through the cover 51 and the waterproof film 58. A conventional motor 53 has multiple holes on the surface of its shaft; the waterproof film 58 seals these holes to improve the waterproof effect of the motor 53. For further waterproofing, adhesive can be applied between the motor 53 and the housing 52 after the motor 53 is installed inside the housing 52.

[0054] In one embodiment, the inner wall of the oil extraction pipe 2 has at least two spaced-apart limiting ribs 203 protruding. The waterproof cover 57 is interference-fitted with the limiting ribs 203, and the waterproof cover 57, the limiting ribs 203, and the inner wall of the oil extraction pipe 2 form an oil passage 206. The limiting ribs 203 separate the inner wall of the oil extraction pipe 2 from the outer wall of the waterproof cover 57 to form the oil passage 206. This allows oil to pass through the oil inlet 241 of the oil extraction pipe 2, through the oil passage 206, and then through the oil extraction pipe 2 to be output from the oil outlet pipe 3 when the motor 53 drives the impeller 54 to rotate.

[0055] Specifically, each limiting rib 203 includes a first protrusion 201 and a second protrusion 202 connected to the first protrusion 201. The second protrusion 202 and the first protrusion 201 are stepped, and the second protrusion 202 is located below the first protrusion 201. Multiple second protrusions 202 and the first protrusion 201 can surround each other to form a second mounting cavity 205, and the waterproof cover 57 is placed in the second mounting cavity 205. That is, the waterproof cover 57 is limited by the first protrusion 201, which limits the relative position of the waterproof cover 57 and the oil extraction pipe 2.

[0056] In one embodiment, the second protrusion forms a guide surface 204 at the end away from the first protrusion 201. The guide surface 204 is a sloped surface and / or an arc surface. This allows the waterproof cover 57 to be placed within the second mounting cavity 205 for product assembly.

[0057] In one embodiment, the oil extraction pipe 2 includes a pipe body 23 with an oil extraction channel 20 and a limiting cap 24 connected to the pipe body 23. Specifically, the oil extraction channel 20 communicates internally with the oil outlet pipe 3, and the pipe body 23 and the limiting cap 24 can be connected by a snap-fit, thread, screw, or other structure. The limiting cap 24 has an oil inlet 241 connected to the oil extraction channel 20. When the motor 53 operates, it drives the impeller 54 to rotate, and the oil can pass through the oil inlet 241 and the oil extraction channel 20 in sequence before being output from the oil outlet pipe 3. In order to facilitate the installation of the waterproof cover 57 in the second mounting cavity 205, the limiting rib 203 is located on the pipe body 23 and is set at one end near the limiting cap 24.

[0058] In one embodiment, the circuit board 7 is located at the end of the battery 6 away from the oil extraction pipe 2. The main unit 1 has a function switch 11 connected to the circuit board 7 on the end face away from the oil extraction pipe 2, so as to avoid the function switch 11 affecting the user's grip on the main unit 1 when the main unit 1 is used as a user handle. Moreover, when the user operates, the function switch 11 can control the start and stop of the pump body 5 via the circuit board 7, so as to allow the user to control the oil extraction.

[0059] In one embodiment, the main unit 1 is provided with a power interface 12 for connecting to an external power source. The power interface 12 is electrically connected to the circuit board 7, and the battery 6 is a rechargeable battery. By connecting to an external power source through the power interface 12, the battery 6 can be charged via the circuit board 7, thereby improving the service life of the portable oil pump in this embodiment.

[0060] In one embodiment, the battery 6 is a dry cell battery. The main unit 1 has a removable battery cover at the position corresponding to the dry cell battery, so that when the battery 6 is depleted, the battery cover can be removed for easy replacement by the user. Specifically, in this embodiment, there are two batteries 6, arranged sequentially away from the oil extraction pipe 2. In this state, the height of the main unit 1 is relatively high. The main unit 1 and the oil extraction pipe 2 are integrated, and the outer wall of the main unit 1 is easy for the user to hold, so that the user can insert the oil extraction pipe 2 into the oil container. The main unit 1 also makes it easy for the user to pick up the product, making it convenient for the user to use. Of course, in other embodiments, the number of dry cell batteries can also be one, three, four, etc., and when there are multiple dry cell batteries, they can be arranged side by side, etc.

[0061] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0062] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0063] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A portable oil pump, characterized in that, include: A host computer, wherein a circuit board and a battery electrically connected to the circuit board are provided on the host computer; Oil extraction tubing, which is connected to the main unit; The pump body is located inside the oil suction pipe at one end, away from the main unit. And an oil outlet pipe, which is connected to and communicates with the oil extraction pipe near the main unit; The pump body includes a waterproof cover, a motor, and an impeller housed within an oil extraction pipe. An oil passage is formed between the waterproof cover and the inner wall of the oil extraction pipe. The motor is housed within the waterproof cover, with its shaft extending through the cover and connecting to the impeller. The impeller is positioned closer to the oil extraction pipe and further away from the main unit. The motor is electrically connected to a circuit board via wires. One end of the wire passes through the oil extraction pipe into the waterproof cover and connects to the motor; the other end of the wire passes through the oil extraction pipe into the main unit and connects to the circuit board. A sealing gasket is provided between the motor and the waterproof cover on the side near the impeller, and the motor shaft passes through the sealing gasket. A first adhesive layer is provided inside the waterproof cover, covering the electrical connection between the wires and the motor, and / or the wires and the waterproof cover are press-fitted.

2. The portable oil pump according to claim 1, characterized in that, The waterproof cover has a wiring hole through which the wire passes; the waterproof cover includes an outer shell and a cover connected to the outer shell to form a first mounting cavity, and the motor and the sealing gasket are both disposed in the first mounting cavity; The cover is located at the top of the housing, the sealing gasket is located on the side of the motor away from the cover, the motor shaft passes through the housing, and the wiring hole is located on the cover; or, the cover is located at or near the bottom of the housing, the sealing gasket is located on the side of the motor near the cover, the motor shaft passes through the cover, and the wiring hole is located on the housing.

3. The portable oil pump according to claim 2, characterized in that, An annular groove is provided on the inner side wall of the outer casing, and an annular block is formed outward along the cover to fit the annular groove. The annular block is placed in the annular groove.

4. The portable oil pump according to claim 2 or 3, characterized in that, When the cover is on top of the housing, the connection between the cover and the housing also forms a first glue-filling groove, which is located on the side of the annular block away from the first mounting cavity, and a second glue layer for sealing is poured into the first glue-filling groove.

5. The portable oil pump according to claim 2 or 3, characterized in that, When the cover is located on top of the housing, the motor is provided with a terminal block, the wire includes a conductive core and an insulating layer covering the outer wall of the conductive core, the terminal block is electrically connected to the conductive core, and the thickness of the first adhesive layer at least covers the terminal block and the conductive core protruding from one end of the insulating layer.

6. The portable oil pump according to claim 2 or 3, characterized in that, When the cover is located on top of the housing, the cover protrudes outward at the position corresponding to the wire to form a potting protrusion. The wiring hole passes through the potting protrusion. The potting protrusion has a second potting groove on the side away from the first mounting cavity that communicates with the wiring hole. A third layer of adhesive for sealing is poured into the second potting groove.

7. The portable oil pump according to claim 2 or 3, characterized in that, When the cover is located at or near the bottom of the housing, the waterproof cover also includes a seal and a waterproof film; The top of the housing forms a raised enclosure and a receiving groove located within the raised enclosure. The wiring hole communicates with the receiving groove. The housing forms a retaining block between the receiving groove and the first mounting cavity. A retaining groove is provided on the outer side wall of the seal. The seal passes through the wiring hole. The retaining block is placed in the retaining groove. Part of the seal is placed in the receiving groove. The wire passes through the seal and is interference-fitted with the seal. The seal is interference-fitted with one or more of the side walls of the receiving groove and the side walls of the wiring hole. The waterproof film is located between the motor and the seal, and the motor shaft passes through the cover and the waterproof film.

8. The portable oil pump according to claim 2 or 3, characterized in that, The inner wall of the oil extraction tube has protrusions forming at least two spaced limiting ribs. The waterproof cover is interference-fitted with the limiting ribs, and the waterproof cover, limiting ribs, and inner wall of the oil extraction tube form an oil passage.

9. The portable oil pump according to claim 8, characterized in that, Each of the limiting ribs includes a first protrusion and a second protrusion connected to the first protrusion. The second protrusion and the first protrusion are stepped. The second protrusion is located below the first protrusion. A plurality of the second protrusions surround to form a second mounting cavity. The waterproof cover is placed in the second mounting cavity.

10. The portable oil pump according to claim 8, characterized in that, The oil extraction tube includes: a tube body with an oil extraction channel, and a limiting cap connected to the tube body; the limiting cap has an oil inlet connected to the oil extraction channel, and the limiting rib is located on the tube body and is set at one end near the limiting cap.

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