Electronic water pump for new energy automobile

Abstract

The utility model relates to an electronic water pump for a new energy automobile, which belongs to the technical field of water pumps and comprises a stator component, an impeller component and a pump cover, the stator component comprises a pump body, an impeller shaft, a stator winding and a wiring terminal, the pump body is a cylindrical plastic part, and one end face of the pump body is provided with a circular pump cavity; the impeller shaft is axially arranged in the circular pump cavity, one end of the impeller shaft is fixedly connected to the pump body, the stator winding is annularly arranged on the inner circumferential wall of the circular pump cavity and fixedly connected to the pump body, the wiring terminal is fixedly connected to the interior of the pump body, and the output end of the wiring terminal is electrically connected with the stator winding. The impeller assembly comprises an impeller and a permanent magnet, the impeller is movably arranged in the pump cavity and rotationally sleeved with an impeller shaft, and the permanent magnet is movably arranged in the pump cavity and is spaced from the stator winding in the radial direction; the pump cover is fixedly connected with the pump body, and a sealed impeller chamber for sealing the impeller assembly is formed between the pump cover and the pump body. According to the utility model, the product assembly efficiency is improved, and the leakage risk is avoided.

Description

Technical Field

[0001] This utility model relates to water pumps, specifically to an electronic water pump for new energy vehicles. Background Technology

[0002] Unlike traditional fuel vehicles, new energy vehicles are powered by lithium-ion batteries. These batteries generate a lot of heat during operation, so new energy vehicles require a more efficient and precise thermal management system to actively intervene, increase the speed of coolant circulation, improve the heat dissipation capacity of the energy storage system, and ensure the efficient operation of the energy storage system.

[0003] The invention patent application document with publication number CN118728731A discloses an electric pump. The stator assembly of the electric pump includes a connecting plate assembly, a stator winding, a pump shaft, and a housing. The stator winding includes a stator core, an insulating frame, and a winding. The connecting plate assembly includes a limiting component and a conductive component. The pump housing includes a first housing and a second housing. As can be seen from the above, the stator assembly has many parts, and each part needs to be assembled one by one. Not only are the process requirements for individual processing and overall assembly high, but the stator assembly also has the risk of leakage during use. Utility Model Content

[0004] The present invention aims to improve the shortcomings of existing electric pumps, such as numerous components, complex processes, and easy leakage.

[0005] Therefore, the present invention adopts the following technical solution:

[0006] An electronic water pump for new energy vehicles includes a stator assembly, an impeller assembly, and a pump cover. The stator assembly includes a pump body, an impeller shaft, a stator winding, and terminals. The pump body is a cylindrical plastic part with a circular pump cavity on one end face. The impeller shaft is axially disposed within the circular pump cavity and one end is plastically fixed to the pump body. The stator winding is arranged around the inner circumferential wall of the circular pump cavity and plastically fixed to the pump body. The terminals are plastically fixed inside the pump body, with the output end electrically connected to the stator winding and the input end exposed outside the pump body. The impeller assembly includes an impeller and a permanent magnet. A bushing is centrally located on one side of the impeller. The bushing is movably disposed within the pump chamber and rotatably fitted onto the impeller shaft to rotatably connect the impeller to the impeller shaft and expose the impeller outside the pump chamber. The permanent magnet is movably disposed within the pump chamber and fitted and fixed to the bushing to be radially separated from the stator winding. The pump cover is fixedly connected to the pump body and is spaced apart from the pump body to form a sealed impeller chamber that encloses the impeller assembly. The pump cover is provided with an inlet pipe and an outlet that connect the sealed impeller chamber to the outside.

[0007] As a preferred embodiment, the impeller shaft, stator winding, and terminals are connected to the pump body in the following manner: the impeller shaft, stator winding, and terminals are all pre-positioned in the mold of the pump body to be fixedly connected to the pump body after injection molding and cooling.

[0008] As a preferred option, the impeller shaft is made of metal.

[0009] As a preferred option, the pump cover is sealed to one end of the pump body where the circular pump cavity is located.

[0010] As a preferred option, the pump cover is fixed to the screw holes on the outer wall of the pump body by screws.

[0011] As a preferred embodiment, a power supply tube is installed vertically on one end face of the pump body where the terminal block is located, and the input end of the terminal block is axially exposed inside the power supply tube.

[0012] As a preferred option, the power supply tube and pump body are integrally injection molded.

[0013] The stator assembly of this utility model features an integral pump body. This pump body integrates the existing product's limiting components, insulating frame, first housing, and second housing into a single piece through injection molding. Furthermore, this utility model integrates the impeller shaft, stator winding (including the stator core), and terminals into the pump body during the molding process, thus simplifying the structure of the stator assembly, reducing assembly steps, and lowering the processing and assembly requirements. This not only improves product assembly efficiency but also eliminates the risk of leakage due to the integral pump body design. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 for Figure 1 Explosion diagram

[0016] Figure 3 This is a cross-sectional view of the overall structure of an embodiment of the present utility model.

[0017] Figure 4 for Figure 3 Explosion diagram Detailed Implementation

[0018] The present invention will now be described in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1-4 The electric water pump for new energy vehicles shown includes a stator assembly 10, an impeller assembly 20, and a pump cover 30.

[0020] The stator assembly 10 includes a pump body 11, an impeller shaft 12, a stator winding 13, and terminals 14.

[0021] The pump body 11 is a cylindrical plastic part, and the impeller shaft 12 is a metal part. A circular pump cavity 11.1 is provided on one end face of the pump body 11. The impeller shaft 12 is axially arranged in the circular pump cavity 11.1 and one end is plastically fixed to the pump body 11. The stator winding 13 is arranged in a ring around the inner peripheral wall of the circular pump cavity 11.1 and plastically fixed to the pump body 11. The terminal 14 is plastically fixed inside the pump body 11 and its output end is electrically connected to the stator winding 13. A power supply tube 11.4 is provided upright on one end face of the pump body 11 where the terminal 14 is located. The power supply tube 11.4 is integrally injection molded with the pump body 11. The input end of the terminal 14 is axially exposed inside the power supply tube 11.4, and thus exposed outside the pump body 11.

[0022] The impeller shaft 12, stator winding 13 and terminal 14 are connected to the pump body 11 in the following way: the impeller shaft 12, stator winding 13 and terminal 14 are all pre-positioned in the mold of the pump body 11 so as to be fixedly connected to the pump body 11 after injection molding and cooling.

[0023] The impeller assembly 20 includes an impeller 21 and a permanent magnet 22. A bushing 21.1 is centrally located on one side of the impeller 21. The bushing 21.1 is movably disposed within the pump chamber 11.1 and rotatably sleeved on the impeller shaft 12 to rotatably connect the impeller 21 to the impeller shaft 12 and to expose the impeller 21 outside the pump chamber 11.1. The permanent magnet 22 is movably disposed within the pump chamber 11.1 and sleeved and fixed on the bushing 21.1 to be radially distanced from the stator winding 13.

[0024] The pump cover 30 is sealed to one end of the pump body 11 where the circular pump chamber 11.1 is located and is fixed to the screw hole post 11.3 on the outer wall of the pump body 11 by screws. The pump cover 30 and the pump body 11 are separated to form a sealed impeller chamber 40 that encloses the impeller assembly 20. The pump cover 30 is provided with an inlet pipe 31 and an outlet 32 ​​that connect the sealed impeller chamber 40 and the outside.

[0025] When in use, the water inlet pipe 31 is connected to the water source, and the stator winding 13 is energized to drive the permanent magnet 22 to rotate at high speed. The permanent magnet 22 drives the impeller 21 to rotate at high speed in the sealed impeller chamber 40, drawing water in from the water inlet pipe 31 and discharging it from the water outlet 32.

Claims

1. An electronic water pump for new energy vehicles, comprising a stator assembly (10), an impeller assembly (20), and a pump cover (30), characterized in that: The stator assembly (10) includes a pump body (11), an impeller shaft (12), a stator winding (13), and a terminal block (14). The pump body (11) is a cylindrical plastic part with a circular pump cavity (11.1) on one end face. The impeller shaft (12) is axially disposed in the circular pump cavity (11.1) and one end is plastically fixed to the pump body (11). The stator winding (13) is disposed around the inner circumferential wall of the circular pump cavity (11.1) and plastically fixed to the pump body (11). The terminal block (14) is plastically fixed inside the pump body (11) and its output end is electrically connected to the stator winding (13), while its input end is exposed outside the pump body (11). The impeller assembly (20) includes an impeller (21) and a permanent magnet (22). One end of the impeller (21) is... A bushing (21.1) is provided in the center of the side. The bushing (21.1) is movably disposed in the pump chamber (11.1) and rotates to fit the impeller shaft (12) so that the impeller (21) is rotatably connected to the impeller shaft (12) and the impeller (21) is exposed outside the pump chamber (11.1). The permanent magnet (22) is movably disposed in the pump chamber (11.1) and fitted and fixed to the bushing (21.1) so as to be radially separated from the stator winding (13). The pump cover (30) is fixedly connected to the pump body (11) and is spaced apart from the pump body (11) to form a sealed impeller chamber (40) that encloses the impeller assembly (20). The pump cover (30) is provided with an inlet pipe (31) and an outlet (32) that connect the sealed impeller chamber (40) and the outside.

2. The electronic water pump for new energy vehicles according to claim 1, characterized in that: The impeller shaft (12), stator winding (13) and terminal (14) are connected to the pump body (11) in the following way: the impeller shaft (12), stator winding (13) and terminal (14) are all pre-positioned in the mold of the pump body (11) so as to be fixedly connected to the pump body (11) after injection molding and cooling.

3. The electronic water pump for new energy vehicles according to claim 1, characterized in that: The impeller shaft (12) is a metal part.

4. The electronic water pump for new energy vehicles according to claim 1, characterized in that: The pump cover (30) is sealed to one end of the pump body (11) where the circular pump chamber (11.1) is located.

5. An electronic water pump for new energy vehicles according to claim 4, characterized in that: The pump cover (30) is fixed to the screw hole post (11.3) on the outer wall of the pump body (11) by screws.

6. The electronic water pump for new energy vehicles according to claim 1, characterized in that: A power supply tube (11.4) is installed upright on one end face of the pump body (11) where the terminal (14) is located, and the input end of the terminal (14) is axially exposed inside the power supply tube (11.4).

7. An electronic water pump for new energy vehicles according to claim 6, characterized in that: The power supply tube (11.4) and the pump body (11) are integrally injection molded.

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