An electronic water pump

Abstract

The utility model provides an electronic water pump. The electronic water pump comprises a volute, a waterproof sleeve, a motor shell, a rear cover and an electromagnetic drive system. The inner chamber partition of the motor shell divides the interior into a first mounting cavity and a second mounting cavity. The open end of the first mounting cavity is provided with the volute. The open end of the second mounting cavity is provided with the rear cover. The electromagnetic drive system comprises a motor stator, a rotor assembly, a motor shaft and a shaft base. The motor shaft is rotatably arranged in the locating part barrel. The motor shaft is sleeved with the rotor assembly. The motor stator is arranged in the motor cavity. The inner ring of the motor stator is in close contact with the outer wall surface of the locating part, and the outer ring is in close contact with the inner wall surface of the motor shell. The electronic water pump fundamentally gets rid of the dependence on the mold, simplifies the structure and the assembly process, and supports the rapid, low-cost sample manufacturing and design optimization to cope with the increasingly fierce technical competition and market challenges in the new energy automobile field.

Description

Technical Field

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

[0002] As a core component of the thermal management system in new energy vehicles, the performance and reliability of electronic water pumps directly affect the safe and efficient operation of battery packs, drive motors, and electronic control systems. With the rapid development of new energy vehicle technology, higher demands are being placed on the power density, efficiency, noise level, and integration of electronic water pumps. They are widely used in critical circuits such as battery cooling, motor cooling, and air conditioning circulation, and are crucial for maintaining the optimal operating temperature of all vehicle systems.

[0003] However, existing electronic water pumps suffer from several shortcomings during the R&D, trial production, and small-batch production stages that urgently need to be addressed: Their structural design is redundant, with numerous parts, a non-compact structure, and complex assembly processes. High mold development costs and long cycles in the manufacturing process severely restrict the rapid iteration and verification of new products. They are extremely unsuitable for trial production, design modifications, and performance verification, significantly extending the product development cycle from design to finalization, and failing to adapt to the short, fast-paced R&D rhythm of the modern new energy vehicle industry.

[0004] Therefore, there is an urgent need for a completely new electronic water pump technology solution. Utility Model Content

[0005] The purpose of this invention is to provide an electronic water pump to solve the problems existing in the prior art.

[0006] The technical solution adopted to achieve the purpose of this utility model is as follows: an electronic water pump, including a volute, a water-proof sleeve, a motor housing, a rear cover, and an electromagnetic drive system.

[0007] The motor housing is a cylindrical shell. An internal partition divides the interior into a first mounting cavity and a second mounting cavity. Through holes are provided on the surface of the internal partition. A volute is provided at the open end of the first mounting cavity. A rear cover is provided at the open end of the second mounting cavity. The rear cover and the second mounting cavity together enclose a controller chamber. A controller is arranged in the controller chamber. A connector is provided beside the controller chamber. A connector terminal is housed within the connector. The connector terminal is electrically connected to the controller.

[0008] The water-proof sleeve includes a positioning part and a flange connection part. The positioning part has a cylindrical structure. A receiving groove is provided on the upper surface of the bottom of the positioning part. The flange connection part extends circumferentially from the open top of the positioning part. The flange connection part is a multi-step flange. The flange connection part is sandwiched between the volute and the motor housing. The positioning part is arranged in the first mounting cavity. The lower end of the positioning part is inserted into a hole in the inner cavity partition. The motor housing and the water-proof sleeve together enclose the motor cavity.

[0009] The electromagnetic drive system includes a motor stator, a rotor assembly, a motor shaft, and a shaft base. The shaft base is fitted into a receiving groove in a water-resistant sleeve. The motor shaft is rotatably mounted inside a positioning section. The lower end of the motor shaft is inserted into the shaft base, and the upper end extends into the volute. The rotor assembly is sleeved on the motor shaft. The motor stator is arranged in the motor cavity. The inner ring of the motor stator is in contact with the outer wall of the positioning section, and the outer ring is in contact with the inner wall of the motor housing.

[0010] Furthermore, the motor cavity is filled with a plastic sealing layer.

[0011] Furthermore, the connector adopts a split-piece design. The connector is embedded in the connector terminal and then bonded to the motor housing.

[0012] Furthermore, the volute, water-proof sleeve, and motor housing are installed onto the thermal management system module with screws and then connected together with screws.

[0013] Furthermore, the volute, water-proof sleeve, motor housing, and rear cover are all plastic parts manufactured using universal machining methods.

[0014] Furthermore, the motor shaft and the shaft base are connected by an interference fit.

[0015] Furthermore, the shaft base and the water-proof sleeve are bonded together as one unit.

[0016] Furthermore, the rear cover is bonded to the motor housing as a single unit.

[0017] The technical effects of this utility model are undeniable: it fundamentally eliminates the dependence on molds, simplifies the structure and assembly process, and supports rapid, low-cost prototype manufacturing and design optimization to cope with the increasingly fierce technological competition and market challenges in the field of new energy vehicles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an electronic water pump.

[0019] Figure 2 This is a schematic diagram of a waterproof sleeve;

[0020] Figure 3 This is a schematic diagram of the motor casing.

[0021] In the diagram: volute 1, water-proof sleeve 2, motor stator 3, motor housing 4, connector terminal 5, inlet sealing ring 6, three-pronged retaining ring 7, outlet sealing ring 8, pump body sealing ring 9, rotor assembly 10, motor shaft 11, shaft base 12, rear cover 13, motor cavity 14. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments, but it should not be construed as the scope of the present invention being limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and conventional methods in the art without departing from the above-described technical concept of the present invention should be included within the protection scope of the present invention.

[0023] Example 1:

[0024] See Figures 1-3 This embodiment provides an electronic water pump, including a volute 1, a water-proof sleeve 2, a motor housing 4, a rear cover 13, and an electromagnetic drive system.

[0025] The motor housing 4 is an integral cylindrical shell. An internal partition divides the interior of the motor housing 4 into a first mounting cavity and a second mounting cavity. Through holes are provided on the surface of the internal partition. A volute 1 is provided at the open end of the first mounting cavity. A rear cover 13 is provided at the open end of the second mounting cavity. The rear cover 13 and the second mounting cavity enclose a controller chamber. A controller is arranged in the controller chamber. A connector is provided beside the controller chamber. A connector terminal 5 is installed inside the connector. The connector terminal 5 is electrically connected to the controller.

[0026] The water-proof sleeve 2 includes a positioning part and a flange connection part. The positioning part has a cylindrical structure. A receiving groove is provided on the upper surface of the bottom of the positioning part. The flange connection part extends circumferentially from the open top of the positioning part. The flange connection part is a multi-step flange. The flange connection part is sandwiched between the volute (1) and the motor housing (4). The positioning part is arranged in the first mounting cavity. The lower end of the positioning part is inserted into the hole of the inner cavity partition. The motor housing 4 and the water-proof sleeve 2 together enclose the motor cavity 14.

[0027] The electromagnetic drive system includes a motor stator 3, a rotor assembly 10, a motor shaft 11, and a shaft base 12. The shaft base 12 is fitted into the receiving groove of the water-proof sleeve 2. The motor shaft 11 is rotatably disposed inside the positioning part barrel. The lower end of the motor shaft 11 is inserted into the shaft base 12, and the upper end extends into the volute 1. The rotor assembly 10 is sleeved on the motor shaft 11. The motor stator 3 is arranged in the motor cavity 14. The inner ring of the motor stator 3 is in contact with the outer wall surface of the positioning part, and the outer ring is in contact with the inner wall surface of the motor housing 4.

[0028] Example 2:

[0029] The main content of this embodiment is the same as that of embodiment 1, wherein the motor cavity 14 is filled with a plastic sealing layer to fix the motor stator and improve NVH performance.

[0030] Example 3:

[0031] The main content of this embodiment is the same as that of Embodiment 1 or 2, except that the connector adopts a split-type insert design. After the connector terminal 5 is embedded, the connector is bonded to the motor housing 4. The split-type insert design of the motor housing connector eliminates the need for a plastic-coated mold for the connector terminal, saving the cost of the injection mold and shortening the part manufacturing time.

[0032] Example 4:

[0033] The main content of this embodiment is the same as any one of embodiments 1 to 3. The volute 1, water-proof sleeve 2, and motor housing 4 are installed to the thermal management system module with screws and then connected together with screws. This eliminates the need for the connecting screws on the electronic water pump itself, and the design of connecting it together with the thermal management system module saves costs and shortens the assembly manufacturing time.

[0034] Example 5:

[0035] The main content of this embodiment is the same as any one of embodiments 1 to 4, wherein the volute 1, the water-proof sleeve 2, the motor housing 4, and the rear cover 13 are all plastic parts manufactured using a universal machining method. Universal machining eliminates the need for injection molds, saving on injection mold costs and shortening part manufacturing time.

[0036] Example 6:

[0037] The main content of this embodiment is the same as any one of embodiments 1 to 5, wherein the motor shaft 11 and the shaft base 12 are connected by interference fit.

[0038] Example 7:

[0039] The main content of this embodiment is the same as any one of embodiments 1 to 6, wherein the shaft base 12 and the water-proof sleeve 2 are bonded together. Bonding the motor shaft base to the water-proof sleeve eliminates the need for a plastic-coated mold, saving the cost of the injection mold and shortening the part manufacturing time.

[0040] Example 8:

[0041] The main content of this embodiment is the same as any one of embodiments 1 to 7, wherein the rear cover 13 is bonded to the motor housing 4 as a whole.

Claims

1. An electronic water pump characterized by: It includes a volute (1), a water-proof sleeve (2), a motor housing (4), a rear cover (13), and an electromagnetic drive system; The motor housing (4) is a cylindrical shell; the inner cavity partition of the motor housing (4) divides the interior into a first mounting cavity and a second mounting cavity; the inner cavity partition has through holes on its surface; a volute (1) is provided at the open end of the first mounting cavity; a rear cover (13) is provided at the open end of the second mounting cavity; the rear cover (13) and the second mounting cavity enclose a controller chamber; a controller is arranged in the controller chamber; a connector is provided on the side of the controller chamber; a connector terminal (5) is installed in the connector; the connector terminal (5) is electrically connected to the controller; The water-proof sleeve (2) includes a positioning part and a flange connection part; the positioning part has a cylindrical structure; the upper surface of the bottom of the positioning part is provided with a receiving groove; the flange connection part extends circumferentially from the open top of the positioning part; the flange connection part is a multi-step flange; the flange connection part is sandwiched between the volute (1) and the motor housing (4); the positioning part is arranged in the first mounting cavity; the lower end of the positioning part is inserted into the hole of the inner cavity partition; the motor housing (4) and the water-proof sleeve (2) together enclose the motor cavity (14). The electromagnetic drive system includes a motor stator (3), a rotor assembly (10), a motor shaft (11), and a shaft base (12); the shaft base (12) is embedded in the receiving groove of the water-proof sleeve (2); the motor shaft (11) is rotatably disposed in the positioning part barrel; the lower end of the motor shaft (11) is inserted into the shaft base (12), and the upper end extends into the volute (1); the rotor assembly (10) is sleeved on the motor shaft (11); the motor stator (3) is arranged in the motor cavity (14); the inner ring of the motor stator (3) is in contact with the outer wall surface of the positioning part, and the outer ring is in contact with the inner wall surface of the motor housing (4).

2. An electronic water pump according to claim 1, characterized in that: The motor cavity (14) is filled with a plastic sealing layer.

3. An electronic water pump according to claim 1, characterized in that: The connector adopts a split-type insert design; the connector is embedded in the connector terminal (5) and then bonded to the motor housing (4).

4. An electronic water pump according to claim 1, characterized in that: The volute (1), water-proof sleeve (2), and motor housing (4) are installed into the thermal management system module by screws and then connected together by screws.

5. An electronic water pump according to claim 1, characterized in that: The volute (1), water-proof sleeve (2), motor housing (4), and rear cover (13) are all plastic parts made using universal machining methods.

6. An electronic water pump according to claim 1, characterized in that: The motor shaft (11) and shaft base (12) are connected by interference fit.

7. An electronic water pump according to claim 1, characterized in that: The shaft base (12) and the water-proof sleeve (2) are bonded together.

8. An electronic water pump according to claim 1, characterized in that: The rear cover (13) is bonded to the motor housing (4) as a whole.

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