Electronic liquid pump and charging gun line using same

Abstract

The utility model discloses an electronic liquid pump and a charging gun line using the same, and the electronic liquid pump comprises a pump body unit which comprises a pump shell and a base which are matched to form an impeller cavity, and an impeller assembly which is arranged in the impeller cavity; the impeller assembly comprises an impeller upper cover provided with a liquid inlet, an impeller bottom plate matched with the impeller upper cover to form a containing cavity and provided with a liquid outlet, and an impeller disc arranged in the containing cavity. The base is suitable for being detachably connected with the impeller bottom plate in a matched mode, and a liquid discharging channel suitable for being communicated with the liquid outlet is formed in the base. The motor unit at least comprises a motor shell detachably connected with the base in a matched mode and an output shaft with one end extending out of the motor shell. One end of the output shaft penetrates through the base, the impeller bottom plate and the impeller disc and then is inserted into the impeller upper cover.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to an electronic liquid pump and a charging gun cable using the same. Background Technology

[0002] With the rapid development of the electric vehicle industry, charging power is constantly increasing to shorten charging time. This increase in charging power leads to a gradual increase in the current carried by the charging gun cable, placing more stringent demands on its heat dissipation. Traditional air cooling is no longer sufficient to meet the high heat dissipation requirements of the charging gun cable, while liquid cooling, with its superior cooling properties, can effectively solve this problem. Liquid cooling relies primarily on its core component, the electronic liquid pump.

[0003] Currently, the industry generally uses crimping to fix the liquid-cooled cable to the charging gun head and the charging pile. The liquid-cooled cable is used to supply coolant flow. Due to the long length of the liquid-cooled cable, the head requirement of the electro-liquid pump used is relatively high. CN 222746256 U discloses an electro-liquid pump and a charging gun cable using it, which can meet the high head requirements. However, in actual production and use, the pump housing and base used to form the impeller cavity are integrated. The base and motor housing are integrally formed, and the stator assembly is housed within the motor housing, forming a dry cavity. The rotor assembly is housed within the cavity formed by the stator assembly and the base, forming a wet cavity, which is used to contain liquid. Based on this structure, for the motor housing with an integrally formed base, the mold cost for the stator assembly injection is increased (mold costs are high, and injection molding is difficult), while the production efficiency of the stator assembly is reduced. Furthermore, the need for maintenance of the stator assembly during use also increases the difficulty.

[0004] Therefore, for the electronic liquid pump used in the aforementioned charging gun line, further optimization of its structure is needed to reduce the difficulty of stator assembly injection molding and improve stator assembly production efficiency. Utility Model Content

[0005] The primary objective of this invention is to provide an electronic liquid pump to address the technical problem of reducing its production cost.

[0006] The second objective of this invention is to provide a charging gun cable to solve the technical problem of reducing the production cost of the electronic liquid pump used in it.

[0007] The electronic liquid pump of this invention is implemented as follows:

[0008] An electronic liquid pump, comprising:

[0009] A pump unit includes a pump housing and a base that cooperate to form an impeller cavity, and an impeller assembly disposed within the impeller cavity; the impeller assembly includes an impeller top cover with an inlet, an impeller bottom plate adapted to the impeller top cover to form a receiving cavity and having an outlet, and an impeller disk disposed within the receiving cavity; the base is adapted to be detachably connected to the impeller bottom plate, and a discharge channel adapted to communicate with the outlet is formed on the base;

[0010] The motor unit includes at least a motor housing that is detachably coupled to a base, and an output shaft with one end extending out of the motor housing; one end of the output shaft is adapted to pass through the base, the impeller base plate and the impeller disk and then be inserted into the impeller top cover.

[0011] In an optional embodiment of this utility model, the base includes a main body portion for forming an impeller cavity with the pump housing and an extension portion connected to the circumferential outer wall of the main body portion for connecting to the motor housing.

[0012] In an optional embodiment of this utility model, the main body is provided with at least three mating holes spaced apart along the circumferential direction; each of the mating holes is adapted to be connected to the impeller base plate by a fastener.

[0013] In an optional embodiment of this invention, at least three of the mating holes on the body are non-uniformly distributed along the circumferential direction.

[0014] In an optional embodiment of this utility model, at least three connecting ears are provided at intervals along the circumferential direction on the extension, and each connecting ear is provided with a connecting hole;

[0015] Each of the aforementioned connection holes is adapted to be connected to the motor housing via a connector.

[0016] In an optional embodiment of this utility model, the motor housing is...

[0017] It is provided with at least three connecting rings suitable for one-to-one mating with each connecting lug, and each connecting ring is provided with a fastening hole for mating connectors.

[0018] In an optional embodiment of this invention, the pump housing is provided with at least three fastening rings adapted to mate one-to-one with each connecting ring, and each of the fastening rings is adapted to mate with a connector.

[0019] In an optional embodiment of this utility model, a sealing ring is also provided between the extension and the motor housing.

[0020] In an optional embodiment of this invention, a seal is also provided between the extension and the pump housing.

[0021] The charging gun cable of this utility model is implemented as follows:

[0022] A charging gun cable includes: the electronic liquid pump.

[0023] By adopting the above technical solution, this utility model has the following beneficial effects: The electronic liquid pump and charging cable of this utility model, for the base that forms an impeller cavity with the pump housing, can be detachably connected to the impeller base plate and the motor housing, respectively. This not only meets the usage requirements of the impeller assembly but also reduces the difficulty of stator assembly injection molding and improves stator assembly production efficiency, while also enhancing the convenience of motor unit maintenance. Based on this base structure, no special design is required for the motor housing itself; therefore, only the base needs to be molded, thus reducing the overall product design and development cost. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the exploded disassembly structure of the electronic liquid pump of this utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the electronic liquid pump of this utility model;

[0026] Figure 3 This is a schematic diagram of the mating structure between the impeller assembly and the base of the electronic liquid pump of this utility model;

[0027] Figure 4 This is a schematic diagram of the base of the electronic liquid pump of this utility model.

[0028] In the diagram: Pump housing 1, fastening ring 11, drain pipe 12, motor housing 2, connecting ring 21, fastening hole 211, base 3, drain channel 31, main body 32, mating hole 321, extension 33, connecting lug 331, connecting hole 332, impeller cover 4, inlet 41, impeller base plate 5, outlet 51, liquid flow channel 6, output shaft 7, annular groove 81, annular groove 82, impeller disc 9. Detailed Implementation

[0029] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] Example 1:

[0031] Please see Figures 1 to 4As shown, this embodiment provides an electronic liquid pump, including: a pump body unit and a motor unit used in conjunction; wherein the motor unit is used to generate power for the operation of the pump body unit. The pump body unit includes a pump housing 1 and a base 3 that are fitted together to form an impeller cavity, and an impeller assembly disposed within the impeller cavity; the impeller cavity is mainly formed in the pump housing 1, which is generally cylindrical in shape, while the base 3 is mainly used to fix one side of the impeller assembly.

[0032] More specifically, the impeller assembly includes an impeller cover 4 with an inlet 41, an impeller base plate 5 adapted to the impeller cover 4 to form a receiving cavity and having an outlet 51, and an impeller disk 9 disposed in the receiving cavity; the impeller disk 9 operates within the receiving cavity. Based on this, it should be noted that the base 3 is adapted to be detachably connected to the impeller base plate 5, and a drainage channel 31 adapted to communicate with the outlet 51 is formed on the base 3. Referring to the accompanying drawings, in one optional embodiment, the impeller cover 4, the impeller base plate 5, and the base 3 can be fastened together using fasteners. This allows the impeller assembly and the base 3 to be assembled as a single unit into the overall electro-hydraulic pump, improving assembly efficiency. It should be noted that when the impeller assembly is assembled and fixed in the impeller cavity, the impeller base plate 5 faces the motor unit and the impeller top cover 4 faces away from the motor unit. This allows the liquid entering the impeller cavity to first enter the impeller top cover 4, and then enter the impeller base plate 5 after passing through the impeller disk 9.

[0033] It should also be noted that liquid flow channels 6 are respectively provided on the facing side surfaces of the impeller top cover 4 and the impeller bottom plate 5; multiple channels penetrating both axial ends are distributed along the circumferential direction on the impeller disk 9; and the liquid flow channels 6 on the impeller top cover 4 and the impeller bottom plate 5 are adapted to cooperate with the impeller disk 9 to form a complete and closed liquid flow cavity, which is simultaneously connected to the inlet 41 and the outlet 51. This structure ensures that most of the liquid remains within the flow channels or in the impeller disk 9. After the liquid enters the impeller assembly from the inlet 41, driven by the high-speed rotation of the impeller disk 9, most of the liquid will accelerate along the flow channels without leakage. After high-speed rotation, the pressure difference between the inlet 41 of the impeller top cover 4 and the outlet 51 of the impeller bottom plate 5 increases, thereby achieving a high head effect when the liquid is discharged from the outlet 51 of the impeller bottom cover and impeller bottom plate 5.

[0034] Secondly, the motor unit includes at least a motor housing that is detachably coupled to the base 3, and an output shaft 7 with one end extending out of the motor housing; one end of the output shaft 7 is adapted to pass through the base 3, the impeller base plate 5 and the impeller disk 9 and then be inserted into the impeller cover 4.

[0035] Based on the above, it should be noted that the base 3 in this embodiment needs to be connected to both the impeller base plate 5 and the motor housing 2. To meet its usage requirements, the specific structure of the base 3 is as follows:

[0036] The base 3 includes a body portion 32 for forming an impeller cavity with the pump housing 1 and an extension portion 33 connected to the circumferential outer wall of the body portion 32 for connecting to a motor housing.

[0037] Furthermore, firstly, the main body 32 is provided with at least three mating holes 321 spaced apart along the circumferential direction; each mating hole 321 is adapted to be connected to the impeller base plate 5 by fasteners such as, but not limited to, screws. It is necessary to note here that the drain channel 31 on the base 3, which forms a liquid outflow channel, is preferably a structure with a continuously closed cross-section, such as a circle. Based on this, in an optional embodiment, the at least three mating holes 321 on the main body 32 are non-uniformly distributed along the circumferential direction, thereby achieving a foolproof function and ensuring that the drain channel 31 on the base 3 is precisely aligned with the drain pipe 12 on the pump housing 1.

[0038] Based on the above, it is necessary to further explain that the impeller top cover 4, impeller bottom plate 5, and base 3 are simultaneously fastened together to form an integral part. When the three mating holes 321 on the base 3 are not evenly distributed along the circumference, the through holes designed on the impeller top cover 4 and impeller bottom plate 5 that are designed to match each mating hole 321 one-to-one are also not evenly distributed along the circumference. This design can ensure that the impeller top cover 4 and impeller bottom plate 5 are precisely aligned through the mistake-proof function, thereby avoiding the impeller top cover 4 and impeller bottom cover from forming a misaligned fit, which would result in an incomplete liquid flow channel 6 and failure to achieve the high head effect.

[0039] Secondly, the extension 33 is provided with at least three connecting ears 331 spaced apart along the circumferential direction, and each connecting ear 331 has a connecting hole 332; each connecting hole 332 is adapted to be connected to the motor housing 2 by a connector, such as, but not limited to, a screw. The motor housing 2 is provided with at least three connecting rings 21 adapted to mate with each connecting ear 331 one-to-one, and each connecting ring 21 has a fastening hole 211 for mate with a connector. In addition, it should be noted that the pump housing 1 is provided with at least three fastening rings 11 adapted to mate with each connecting ring 21 one-to-one, and each fastening ring 11 is adapted to mate with a connector. In other words, for the motor housing 2 and pump housing 1 in this embodiment, regardless of whether the base 3 is designed, the motor housing 2 and pump housing 1 need to be connected by a connector. Therefore, in this embodiment, the motor housing 2 does not need to be specially molded to design a corresponding mating structure for the mating base 3. The base 3 only needs to be designed with corresponding connecting ears 331 to adapt to the connection structure of the motor housing 2 and pump housing 1. Thus, for the overall electronic liquid pump, the base 3, which has been assembled with the impeller assembly, can be installed simultaneously during the assembly of the motor housing 2 and pump housing 1.

[0040] Based on the above structure, it is also necessary to explain that a sealing ring is provided between the extension 33 and the motor housing 2. Furthermore, a sealing element is provided between the extension 33 and the pump housing 1. For this purpose, the end face of the motor housing 2 facing the extension 33 and / or the end face of the extension 33 facing the motor housing 2 has an annular groove 81 suitable for the sealing ring to be partially embedded along its axial direction. The end face of the pump housing 1 facing the extension 33 and / or the end face of the extension 33 facing the pump housing 1 has an annular groove 82 suitable for the sealing element to be partially embedded along its axial direction.

[0041] Regarding the motor unit of this embodiment, it should also be noted that it can be selected from any mature means in the prior art, which generally includes a stator assembly and a rotor assembly used in conjunction. The stator assembly is housed within the motor housing, forming a dry cavity; the rotor assembly is housed within the cavity formed by the stator assembly and the base 3, forming a wet cavity, which is used to contain liquid. It is understood that the motor unit also includes a controller to control the operating state of the motor unit.

[0042] In summary, for the electronic liquid pump of this embodiment, after the liquid (which is also the coolant when the electronic liquid pump is used in a charging gun cable) enters the pump housing 1 through the injection pipe, the liquid passes through the impeller assembly, and then, under the pressure inside the cavity, the liquid flows through the drain channel 31 of the base 3, and finally is discharged from the drain pipe of the pump housing 1. Furthermore, for the electronic liquid pump of this embodiment, compared with the electronic liquid pump and charging gun cable using the same disclosed in CN222746256U, although the base 3 is integrally formed on the motor housing 2 in CN222746256U, in the entire assembly process of the electronic liquid pump, the impeller cover 4 and the impeller base plate 5 of the impeller assembly are simultaneously fastened to the base 3 by means of, but not limited to, screws, and then the pump housing 1 and the motor housing 2 are assembled together. Therefore, the overall assembly process of the electronic liquid pump between the motor unit and the pump body unit includes two core steps. In this embodiment of the electronic liquid pump, the impeller cover 4, the impeller base plate 5, and the base 3 are simultaneously fastened together as an integral structure. This integral structure is then simultaneously connected to the pump housing 1 and the motor housing 2. Therefore, the assembly process between the motor unit and the pump body unit of this embodiment of the electronic liquid pump also includes two core steps. Thus, the electronic liquid pump of this embodiment separates the base 3 from the motor housing 2, which does not increase the overall installation process of the electronic liquid pump, reduces the difficulty of the stator assembly injection mold, and improves the production efficiency of the stator assembly. Moreover, the motor housing 2 can also adopt mature methods in the prior art, and does not require a special mold design for the motor housing 2 integrated with the base 3. Therefore, compared with the prior art, the electronic liquid pump of this embodiment can reduce the overall product design and production costs.

[0043] Example 2:

[0044] Based on the electronic liquid pump of Embodiment 1, this embodiment provides a charging gun cable that includes the electronic liquid pump of Embodiment 1.

[0045] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0046] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0050] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. An electronic liquid pump, characterized in that, include: A pump unit includes a pump housing and a base that cooperate to form an impeller cavity, and an impeller assembly disposed within the impeller cavity; the impeller assembly includes an impeller top cover with an inlet, an impeller bottom plate adapted to the impeller top cover to form a receiving cavity and having an outlet, and an impeller disk disposed within the receiving cavity; the base is adapted to be detachably connected to the impeller bottom plate, and a discharge channel adapted to communicate with the outlet is formed on the base; The motor unit includes at least a motor housing that is detachably coupled to the base, and an output shaft that extends out of the motor housing at one end. One end of the output shaft is adapted to pass through the base, the impeller base plate and the impeller disk and then be inserted into the impeller cover.

2. The electronic liquid pump according to claim 1, characterized in that, The base includes a main body portion for forming an impeller cavity with the pump housing and an extension portion connected to the circumferential outer wall of the main body portion for connecting to the motor housing.

3. The electronic liquid pump according to claim 2, characterized in that, The main body is provided with at least three mating holes spaced apart along the circumferential direction; each of the mating holes is adapted to be connected to the impeller base plate by a fastener.

4. The electronic liquid pump according to claim 3, characterized in that, At least three of the mating holes on the body are not evenly distributed along the circumferential direction.

5. The electronic liquid pump according to any one of claims 2 to 4, characterized in that, The extension is provided with at least three connecting ears spaced apart along the circumferential direction, and each connecting ear is provided with a connecting hole; Each of the aforementioned connection holes is adapted to be connected to the motor housing via a connector.

6. The electronic liquid pump according to claim 5, characterized in that, On the motor housing It is provided with at least three connecting rings suitable for one-to-one mating with each connecting lug, and each connecting ring is provided with a fastening hole for mating connectors.

7. The electronic liquid pump according to claim 6, characterized in that, The pump housing is provided with at least three fastening rings adapted to mate one-to-one with each connecting ring, and each of the fastening rings is adapted to mate with a connector.

8. The electronic liquid pump according to any one of claims 2 to 4, characterized in that, A sealing ring is also provided between the extension and the motor housing.

9. The electronic liquid pump according to any one of claims 2 to 4, characterized in that, A seal is also provided between the extension and the pump housing.

10. A charging gun cable, characterized in that, include: The electronic liquid pump as described in any one of claims 1 to 9.

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