Stator structure of electronic water pump

Abstract

The utility model relates to an electronic water pump structure. A stator structure of an electronic water pump comprises a stator assembly, a controller partition plate is installed at one end of the stator assembly, a PCBA board is installed on the controller partition plate, the stator assembly is wrapped with a plastic-coated part, one end of the plastic-coated part is connected with the controller partition plate, and the other end of the plastic-coated part is connected with a shell. A first sealing ring is arranged between the plastic-coated part and the controller partition plate, a second sealing ring is arranged between the plastic-coated part and the shell, and a hot riveting column is formed on the upper end face of the plastic-coated part and penetrates through the controller partition plate to be fixed to the PCBA board. The stator structure of the electronic water pump is simple in structure, few in process steps, good in waterproof effect and good in economical efficiency. The technical problems that in the prior art, a shielding sleeve of an electronic water pump stator assembly can only play a single waterproof role, and a connecting piece connected with a controller structure needs to be additionally arranged, so that the structure is complex, and cost is high are solved.

Description

Technical Field

[0001] This utility model relates to an electronic water pump structure, and more particularly to a stator structure for an electronic water pump. Background Technology

[0002] Automotive electronic water pumps are commonly used in many new energy vehicles, RVs, and other special vehicles as miniature water pumps for water circulation, cooling, or onboard water supply systems. These miniature self-priming water pumps are collectively referred to as automotive water pumps. The circular motion of the motor causes the diaphragm inside the pump to reciprocate through a mechanical device, thereby compressing and stretching the air inside the pump chamber. Under the action of a one-way valve, positive pressure is created at the drain outlet, and a vacuum is created at the inlet, thus generating a pressure difference with the external atmospheric pressure. Under the action of this pressure difference, water is forced into the inlet and then discharged from the drain outlet. Under the action of the kinetic energy transmitted by the motor, water is continuously drawn in and discharged, forming a relatively stable flow rate.

[0003] Electronic water pumps typically use brushless shielded pumps, meaning the motor is a brushless motor, and the pump impeller and rotor are immersed in the medium together, statically sealed to the housing by a shielding sleeve. When the stator assembly is connected to the controller component at the upper end, a separate connection and fixing component needs to be designed, resulting in a complex structure, multiple processes, and high costs. Summary of the Invention

[0004] This utility model provides a stator structure for an electronic water pump that is simple in structure, has few process steps, good waterproof effect, and is economical. It solves the technical problem that the shielding sleeve of the stator assembly of the electronic water pump in the prior art can only play a single waterproof role, and requires additional connecting parts for connection with the controller structure, which leads to complex structure and high cost.

[0005] The above-mentioned technical problem of this utility model is solved by the following technical solution: A stator structure of an electronic water pump includes a stator assembly located inside the housing of the electronic water pump, a coaxial rotor assembly disposed inside the stator assembly, a controller partition plate installed at one end of the stator assembly, a PCBA board installed on the controller partition plate, an impeller component disposed at the other end of the stator, the stator assembly being covered with a plastic coating, one end of the plastic coating being connected to the controller partition plate, the other end of the plastic coating being connected to the housing, a first sealing ring being disposed between the plastic coating and the controller partition plate, a second sealing ring being disposed between the plastic coating and the housing, and a hot-riveting post being formed on the upper end face of the plastic coating, the hot-riveting post passing through the controller partition plate and fixed to the PCBA board. After winding, the stator assembly is plastic-coated, forming two structures. O-rings seal the stator assembly to the housing and controller partition, respectively, immersing the rotor and impeller in the medium while isolating the enameled wire, PCBA board, and stator core from the medium. Simultaneously, the plastic-coated hot-riveting posts pass through the controller partition and mate with the PCBA board, securing it via hot riveting. The plastic-coated component serves not only as a connecting part to the controller components (and the PCBA board) but also as a waterproof sleeve. It features a simple structure, low cost, and few manufacturing steps.

[0006] Preferably, the plastic-coated part has three hot-riveting posts, with three-phase wire guide posts spaced apart between them, and the hot-riveting posts and three-phase wire guide posts are arranged alternately. The phase wires (U / V / W) of the enameled wire extend to a specific position through the three-phase wire guide post structure on the end face of the plastic-coated part, and are then soldered to the PCBA. The structure is simple.

[0007] Preferably, the plastic-coated part has a through hole at its center, and a rotor assembly is installed inside the through hole. The end of the controller partition extends into one end of the through hole, and the first sealing ring is located between the inner wall of the through hole and the outer surface of the controller partition. This provides good water resistance.

[0008] Preferably, the plastic-coated part has a through hole at its center, and a mounting boss is formed on the housing that extends into the other end of the through hole. The second sealing ring is located between the inner wall of the through hole and the outer surface of the mounting boss.

[0009] Preferably, the rotor assembly is covered with a plastic-coated rotor. A metal gasket is mounted on one side of the plastic-coated rotor via a snap-fit ​​structure. A rubber ring is placed between the metal gasket and the plastic-coated rotor. The metal gasket contacts the bearing, which is located between the impeller component and the rotor assembly. In the event of axial collision or axial force fluctuation, the gasket axially presses against the rubber ring, thereby reducing the impact of axial force fluctuation and lowering vibration and noise. The gasket rubs against the end face of the sliding bearing to provide thrust and balance the axial thrust. The metal gasket on the rotor is always in contact with the bearing, avoiding collisions caused by drastic changes in pump operating conditions. Compared to existing rotor damping structures on the market, the thrust gasket in this structure requires no other parts for fixing, and the rubber O-ring can be selected from existing O-rings as needed, making it more economical.

[0010] Therefore, the stator structure of the electronic water pump of this utility model has the following advantages: the plastic-coated part wraps the stator assembly, which not only serves as a waterproof sleeve, but also has hot riveting posts and three-phase line guide posts formed on the upper surface of the plastic-coated part, which can be directly connected to the PCBA board without the need to form other connecting parts. The structure is simple, the cost is low, and the installation is convenient. Attached Figure Description

[0011] Figure 1 This is a three-dimensional diagram of the stator structure of an electronic water pump.

[0012] Figure 2 yes Figure 1 A three-dimensional view from another direction.

[0013] Figure 3 yes Figure 1 A sectional view.

[0014] Figure 4 It is a 3D view of the plastic-coated part.

[0015] Figure 5 This is a cross-sectional view of an electronic water pump. Detailed Implementation

[0016] The technical solution of the utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] Example:

[0018] like Figure 1 and 2 As shown in Figure 3, a stator structure for an electronic water pump includes a stator assembly 2 located within the housing 14 of the electronic water pump. The stator assembly 2 includes a stator core enameled wire, etc. After the stator assembly 2 is wound, it is coated with plastic to form a plastic-coated part 1 on the outside of the stator assembly. The center of the plastic-coated part 1 is a through hole 15, and a rotor assembly 8 is installed in the through hole 15. The rotor assembly 8 is sleeved on the rotating shaft 3.

[0019] One end of the plastic-coated part 1 is connected to the controller partition 12, and the other end of the plastic-coated part 1 is connected to the housing 14. The end of the controller partition 12 extends into one end of the through hole 15, and the first sealing ring 4 is located between the inner wall of the through hole and the outer surface of the controller partition 12. At the same time, a mounting boss is formed on the housing 14, extending into the other end of the through hole 15, and the second sealing ring 5 is located between the inner wall of the through hole and the outer surface of the mounting boss.

[0020] like Figure 4 As shown, three hot riveting posts 6 and three three-phase line guide posts 7 are formed on the end face of the plastic-coated part 1, and the hot riveting posts 6 and three-phase line guide posts 7 are arranged alternately.

[0021] like Figure 5As shown, a controller assembly 12 is arranged at one end of the stator assembly 2. The controller assembly 12 includes a controller partition 12 that contacts the plastic-coated part of the stator assembly 2. A PCBA board 13 is installed above the controller partition 12. The heat-riveting post 6 on the upper end face of the plastic-coated part 1 of the stator assembly passes through the controller partition 12 and is fixed to the PCBA board 13 by heat riveting. The three-phase lines (U / V / W) of the stator assembly pass through the three-phase line guide post 7 and are then welded to the PCBA board 13. The rotor assembly 8 is wrapped with a rotor plastic-coated part 11. A metal gasket 10 is installed on one side of the rotor plastic-coated part 11 by a snap-fit ​​structure. A rubber ring 9 is provided between the metal gasket 10 and the rotor plastic-coated part 11. The metal gasket 10 contacts the bearing 16, which is located between the impeller component and the rotor assembly. The impeller component is located inside the housing.

[0022] The specific embodiments described herein are merely illustrative of the concept of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A stator structure for an electronic water pump, comprising a stator assembly located within the housing of the electronic water pump, a coaxial rotor assembly disposed within the stator assembly, a controller partition mounted at one end of the stator assembly, a PCBA board mounted on the controller partition, and an impeller component disposed at the other end of the stator, characterized in that: The stator assembly is covered with a plastic-coated part. One end of the plastic-coated part is connected to the controller partition, and the other end of the plastic-coated part is connected to the housing. A first sealing ring is provided between the plastic-coated part and the controller partition, and a second sealing ring is provided between the plastic-coated part and the housing. A hot-riveting post is formed on the upper end face of the plastic-coated part. The hot-riveting post passes through the controller partition and is fixed to the PCBA board.

2. The stator structure of an electronic water pump according to claim 1, characterized in that: The plastic-coated part is formed by three hot riveting pillars, and three-phase wire guide pillars are arranged at intervals between the hot riveting pillars, with the hot riveting pillars and three-phase wire guide pillars arranged alternately.

3. The stator structure of an electronic water pump according to claim 1 or 2, characterized in that: The plastic-coated part has a through hole at its center, in which a rotor assembly is installed. The end of the controller partition extends into one end of the through hole, and the first sealing ring is located between the inner wall of the through hole and the outer surface of the controller partition.

4. The stator structure of an electronic water pump according to claim 1 or 2, characterized in that: The plastic-coated part has a through hole at its center, and a mounting boss is formed on the housing that extends into the other end of the through hole. The second sealing ring is located between the inner wall of the through hole and the outer surface of the mounting boss.

5. The stator structure of an electronic water pump according to claim 1 or 2, characterized in that: The rotor assembly is provided with a rotor plastic coating. A metal gasket is installed on one side of the rotor plastic coating through a snap-fit ​​structure. A rubber ring is provided between the metal gasket and the rotor plastic coating. The metal gasket is in contact with the bearing, which is located between the impeller component and the rotor assembly.

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