Electronic water pump

Abstract

The utility model discloses an electronic water pump, and particularly relates to the technical field of water pumps, the electronic water pump comprises a plurality of spliced stator cores, an insulating framework is fixed on the outer surfaces of the stator cores, a plastic cover plate is arranged at the lower end of the insulating framework, and a plurality of binding posts are fixed at the lower end of the plastic cover plate. And a rotor assembly is also arranged in the stator shell. According to the electronic water pump, the design that the stator shell and the rotor shell are integrally formed in an injection molding mode is adopted, the stator shell can facilitate production of the water pump, meanwhile, the stator core, the insulation framework and the plastic cover plate can be sealed, the stator core and a winding are prevented from being corroded by water when the device is used, the service life of the water pump is prolonged, and the service life of the water pump is prolonged. The rotor assembly can prevent water from corroding the rotor iron core and the permanent magnet during actual use of the water pump, so that the electronic water pump is more stable during use, and the service life is relatively long.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to an electronic water pump. Background Technology

[0002] Electric water pumps are widely used in the cooling systems of conventional and new energy vehicles to provide power for the circulation of cooling water in the cooling system, thereby improving the cooling efficiency of the cooling system.

[0003] Chinese patent document CN219622892U relates to an electronic water pump, including a pump cover, a rear cover, a rotor, and a stator. The stator includes a stator pump body and an isolation sleeve assembly. The isolation sleeve assembly includes a plastic sleeve base and a metal sleeve embedded in the plastic sleeve base. The metal sleeve covers the outer periphery of the rotor. The pump cover, plastic sleeve base, stator pump body, and rear cover are sequentially joined and fixed to form the outer casing of the electronic water pump. This invention strengthens the structural strength of the entire electronic water pump body by embedding a metal sleeve in the plastic sleeve base. With this design, the invention eliminates the need for internal glue filling as in existing technologies. A hollow cavity is maintained between the metal sleeve and the rear cover, facilitating the disassembly and maintenance of the printed circuit board and the stator.

[0004] However, in actual use, water can enter the rotor or stator of the electronic water pump, causing corrosion to the circuit. The service life of the electronic water pump is relatively short, and the stator core adopts an integrated design, which is inconvenient for winding and installation. Utility Model Content

[0005] The main purpose of this utility model is to provide an electronic water pump that can effectively solve the problems of relatively short service life and inconvenient wiring and installation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An electronic water pump includes multiple spliced ​​stator cores. An insulating frame is fixed to the outer surface of each stator core. A plastic cover is provided at the lower end of the insulating frame. Multiple terminals are fixed at the lower end of the plastic cover. The stator cores, the insulating frame, and the outer surface of the plastic cover are collectively provided with a stator housing. A rotor assembly is also provided inside the stator housing.

[0008] Preferably, the insulating frame includes a wire guide frame and a conductive sheet end frame, and the plastic cover plate is fixed to the lower end of the plurality of conductive sheet end frames.

[0009] Preferably, the stator housing is further fixed with a support shaft coaxial with the rotor assembly.

[0010] Preferably, the rotor assembly includes a rotor core, with a plurality of permanent magnets arranged in a ring array on the outer surface of the rotor core. The upper and lower ends of the rotor core are respectively provided with a first retainer and a second retainer. The inner surfaces of the first retainer and the second retainer are jointly provided with a water pump impeller sleeved on the outer surface of the support shaft. The outer surfaces of the first retainer and the second retainer are jointly provided with an integrally injection-molded rotor shell.

[0011] Preferably, both the first retainer and the second retainer are made of plastic.

[0012] Preferably, the pump impeller is composed of an H-shaped bracket and an impeller body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model adopts an integrated injection molding design for the stator housing and rotor housing. The stator housing facilitates the production of the water pump and also seals the stator core, insulating frame, and plastic cover plate to prevent water from corroding the stator core and windings during use, thus extending the service life of the water pump. It also serves as insulation. The rotor assembly prevents water from corroding the rotor core and permanent magnets during actual use, thus affecting the service life of the water pump. This makes the electronic water pump more stable during use and has a relatively long service life.

[0015] 2. This utility model adopts a design of splicing multiple stator cores, which makes the structure more compact compared to traditional stator cores, facilitates mechanized winding, improves the slot fill factor of the winding, and uses an insulating frame to facilitate mechanized winding of the stator core and improve the slot fill factor of the winding. At the same time, the insulating frame can also provide insulation between the winding and the stator core. The insulating frame adopts a design with separate wire guide frame and conductive sheet end frame, which can also facilitate installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention;

[0018] Figure 3 This is an exploded view of the interior of the stator housing of this utility model;

[0019] Figure 4 This is a partial structural schematic diagram of the rotor assembly of this utility model;

[0020] Figure 5 This is a partial exploded view of the rotor assembly of this utility model;

[0021] Figure 6This is an overall sectional view of the present invention.

[0022] In the diagram: 1. Stator core; 2. Insulating frame; 21. Wire guide frame; 22. Conductor end frame; 3. Plastic cover plate; 4. Terminal block; 5. Stator housing; 6. Support shaft; 7. Rotor assembly; 71. Rotor core; 72. Permanent magnet; 73. Cage one; 74. Cage two; 75. Pump impeller; 751. H-type bracket; 752. Impeller body; 76. Rotor housing. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figures 1-3 As shown, an electronic water pump includes multiple spliced ​​stator cores 1, which together form the core of a finished stator. Compared to traditional stator cores, this design allows for a more compact structure, facilitates mechanized winding, and improves the slot fill factor. An insulating frame 2 is fixed to the outer surface of each stator core 1. The insulating frame 2 includes a wire guide frame 21 and a conductive plate end frame 22. The insulating frame 2 facilitates mechanized winding of the stator core 1, improves the slot fill factor, and also allows the winding to... The stator cores 1 serve as insulation between each other. The insulating frame 2 adopts a separate design for the wire guide frame 21 and the conductive plate end frame 22, which also facilitates installation. The lower ends of multiple conductive plate end frames 22 are jointly fixed with a plastic cover plate 3. The plastic cover plate 3 facilitates the interconnection between multiple conductive plate end frames 22. When installing the motor water pump, first install multiple conductive plate end frames 22 on the upper end of the plastic cover plate 3, then install the stator core 1 in the groove of the conductive plate end frame 22, and finally install the wire guide frame 21.

[0025] In addition, multiple terminals 4 are fixed at the lower end of the plastic cover plate 3. In actual use, the terminals 4 are connected to the windings on the outer surface of the insulating frame 2, and the other end is connected to the power supply line. The number of terminals 4 can be three or two, depending on the actual situation. The stator core 1, insulating frame 2, and outer surface of the plastic cover plate 3 are all provided with an integrally injection-molded stator housing 5. The integral injection-molded design of the stator housing 5 facilitates the production of the water pump and also seals the stator core 1, insulating frame 2, and plastic cover plate 3, preventing water from corroding the stator core 1 and windings during use, extending the service life of the water pump, and also providing insulation. Furthermore, the stator housing 5 needs to have a recessed area (e.g., for easy installation of the rotor assembly 7) during injection molding. Figure 6As shown, the recess is also used for the installation of the support shaft 6. The stator housing 5 is also equipped with a rotor assembly 7. At the same time, in order to facilitate the installation of the rotor assembly 7, the stator housing 5 is also fixed with a support shaft 6 coaxial with the rotor assembly 7. Since the stator housing 5 is injection molded, the support shaft 6 is also integrally injection molded on the stator housing 5. The support shaft 6 is used to support the rotor assembly 7.

[0026] like Figures 4-6 As shown, the rotor assembly 7 includes a rotor core 71. Multiple permanent magnets 72 are arranged in a ring array on the outer surface of the rotor core 71. The rotor core 71 and the permanent magnets 72 together form a rotor, so that the rotor can rotate when multiple coils are powered. The upper and lower ends of the rotor core 71 are respectively provided with a first retainer 73 and a second retainer 74 for limiting the permanent magnets 72. Both the first retainer 73 and the second retainer 74 are made of plastic, which can prevent the permanent magnets 72 from detaching from the outer surface of the rotor core 71 when the rotor core 71 rotates at high speed. At the same time, the use of plastic material will not interfere with the magnetic field. The inner surfaces of the first retainer 73 and the second retainer 74 are together provided with a water pump impeller 75 sleeved on the outer surface of the support shaft 6.

[0027] In addition, such as Figure 5 As shown, the pump impeller 75 is composed of an H-shaped bracket 751 and an impeller body 752. The pump impeller 75 is integrally injection molded. The H-shaped bracket 751 is used to fix the first cage 73 and the second cage 74, and also facilitates the connection between the impeller body 752 and the first and second cages 73 and 74. Figure 6 As shown, the outer surfaces of cage 1 73 and cage 2 74 are jointly provided with an integrally injection-molded rotor housing 76. The integral design of the rotor housing 76 prevents water from corroding the rotor core 71 and permanent magnet 72 during actual use, thus affecting the service life of the water pump. The support shaft 6 also supports the rotor housing 76 and limits its movement, reducing the shaking of the rotor housing 76 during high-speed rotation and making the water pump more stable during use. At the same time, the support shaft 6 and the rotor housing 76 can also be connected by a bearing (the inner ring of the bearing is fixedly connected to the support shaft 6, and the outer ring is fixedly connected to the rotor housing 76, so that the rotor assembly 7 can rotate smoothly), preventing the rotor assembly 7 from detaching from the recess of the stator housing 5 during the use of the water pump, making the device more stable during use.

[0028] The specific implementation of this utility model is as follows: When in actual use, this electronic water pump is installed on the engine or water tank that needs to be used, and the water tank or engine needs to be equipped with an integrated inlet and outlet (in reality, there are also integrated inlet and outlet ports on the engine or water tank, which will not be described in detail in this utility model). Then, power is supplied to the electronic water pump. When supplying power, the wire needs to be connected to multiple terminals 4 so that the electronic water pump can work normally, thereby allowing the water pump impeller 75 to rotate at high speed and perform water pumping operation.

[0029] It should be noted that the specific installation methods, circuit connection methods, and control methods of the stator core 1, rotor core 71, and permanent magnet 72 in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An electronic water pump, comprising multiple spliced ​​stator cores (1), characterized in that: An insulating frame (2) is fixed on the outer surface of the stator core (1). A plastic cover plate (3) is provided at the lower end of the insulating frame (2). A plurality of terminals (4) are also fixed at the lower end of the plastic cover plate (3). The stator core (1), the insulating frame (2) and the plastic cover plate (3) are together provided with a stator housing (5). A rotor assembly (7) is also provided inside the stator housing (5).

2. The electronic water pump according to claim 1, characterized in that: The insulating frame (2) includes a wire guide frame (21) and a conductive sheet end frame (22), and the plastic cover plate (3) is fixed to the lower end of the plurality of conductive sheet end frames (22).

3. An electronic water pump according to claim 1, characterized in that: The stator housing (5) also has a support shaft (6) that is coaxial with the rotor assembly (7) fixed inside.

4. An electronic water pump according to claim 3, characterized in that: The rotor assembly (7) includes a rotor core (71). A plurality of permanent magnets (72) are arranged in a ring array on the outer surface of the rotor core (71). The upper and lower ends of the rotor core (71) are respectively provided with a first retainer (73) and a second retainer (74). The inner surfaces of the first retainer (73) and the second retainer (74) are provided with a water pump impeller (75) sleeved on the outer surface of the support shaft (6). The outer surfaces of the first retainer (73) and the second retainer (74) are provided with an integrally injection-molded rotor shell (76).

5. An electronic water pump according to claim 4, characterized in that: Both the first retainer (73) and the second retainer (74) are made of plastic.

6. An electronic water pump according to claim 4, characterized in that: The pump impeller (75) is composed of an H-shaped bracket (751) and an impeller body (752).

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