Automobile electronic water pump

Abstract

This utility model relates to automotive parts, and more particularly to an automotive electronic water pump. An automotive electronic water pump includes a water inlet assembly and a volute. A shaft is located at the center of the water inlet assembly, and an impeller bearing is located in the middle of the impeller assembly. The impeller assembly is installed within the water inlet assembly, and the impeller bearing is sleeved on the shaft. A thrust washer is provided on the surface of the impeller bearing. A volute is located on the water inlet assembly, and a pipe fitting a is located in the middle of the volute. A pressure piece for fixing the thrust washer is located on the lower inner wall of pipe fitting a. A pipe fitting b is located on the outer wall of the volute, and an arc-shaped channel is located on the inner wall of the volute, communicating with pipe fitting b. A stator assembly is located at the bottom of the water inlet assembly. The volute, water inlet assembly, and main housing are fixed by screws a. A connector assembly is located at the bottom of the stator assembly. The advantages of this utility model include: a six-slot motor design, low starting torque, starting current less than 4A with no current spikes, low current, and low impact on vehicle installation; and a separate connector design that allows for multiple uses in one unit.

Description

Technical Field

[0001] This utility model relates to automotive parts, and in particular to an automotive electronic water pump. Background Technology

[0002] Water pumps on the market are heavy, increasing vehicle energy consumption. Most water pumps are constant speed pumps, with little change in flow and head in the early stages, making precise control impossible. Excessive starting current poses a risk of blowing vehicle fuses. The integrated connector design of water pumps makes it impossible to use one pump for multiple purposes. Electronic water pumps mostly use constant speed control logic, with slow change in flow and head in the early stages, making precise control impossible. The starting current is about 3A or more, which has a significant impact on the vehicle's fuses. The integrated connector design requires significant modifications to match new vehicle models. Summary of the Invention

[0003] To address the aforementioned significant technical problems, this utility model provides an automotive electronic water pump.

[0004] The technical solution of this utility model is as follows:

[0005] An automotive electronic water pump includes a water inlet assembly and a volute. The water inlet assembly has a central shaft, and an impeller assembly has an impeller bearing in the middle. The impeller assembly is installed within the water inlet assembly, and the impeller bearing is sleeved on the shaft. A thrust washer is provided on the surface of the impeller bearing. The volute is mounted on the water inlet assembly, and a pipe fitting a is located in the middle of the volute. A pressure piece for fixing the thrust washer is located on the lower inner wall of pipe fitting a. A pipe fitting b is located on the outer wall of the volute, and an arc-shaped channel communicating with pipe fitting b is located on the inner wall of the volute. A stator assembly is located at the bottom of the water inlet assembly. The volute, water inlet assembly, and main housing are fixed by screws a. A lower wire frame is located at the bottom of the stator assembly, and a pin a and an enameled wire piercing terminal are arranged around the bottom of the lower wire frame. The pin a is inserted into the main housing. A circuit board is located at the bottom of the main housing, and the enameled wire piercing terminal is inserted into the circuit board. A Hall effect bracket is located on the circuit board. A connector is located on the bottom side wall of the main housing, and the bottom of the main housing is sealed by a rear cover.

[0006] The water-proof chamber assembly has a cavity in the middle, the inner wall of the water-proof chamber assembly forms an arc wall, the outer wall has a step, a volute sealing ring is provided on the step, and the edge of the water-proof chamber assembly has a mounting hole.

[0007] The thrust washer is a ring with three spring pieces on it. The bottom surface of the pressure piece is smooth and has three notches that press the spring pieces.

[0008] The stator assembly includes an upper winding frame, an inner wall of which is provided with a six-slot motor frame a, and an inner wall of the six-slot motor frame a is provided with a stop seat a. The upper winding frame is fitted onto the lower outer wall of the water-proof chamber assembly. The lower part of the water-proof chamber assembly is cylindrical, and the six-slot motor frame a is housed outside the cylindrical body. Below the stop seat a is a stator silicon steel sheet frame, which is provided with a six-slot stator frame. Below the stator silicon steel sheet frame is a lower winding frame. The connector assembly is provided with a six-slot stop seat b, and the six-slot stator frame is located on the six-slot stop seat b. Coils are fitted onto the six-slot motor frame a, the six-slot stator frame, and the six-slot stop seat b.

[0009] The connection between the water-proof chamber assembly and the main housing is provided with a main housing sealing ring, and the connection between the main housing and the rear cover is provided with a rear cover sealing ring. The main housing and the rear cover are fixed by screw b, and the main housing and the rear cover are welded together for sealing.

[0010] The impeller assembly includes an upper impeller body connected to a lower impeller body via a graphite bearing. The upper impeller body has a graphite bearing in the center, with blades arranged obliquely from the inside out. The lower impeller body is encased in ferrite, also with a graphite bearing in the center. Ferrite is injection molded through an outer plastic casing. The bottom center of the lower impeller body is hollow. Five blades are evenly distributed and are arc-shaped. The outer plastic casing uses a 0.5mm PPS shell. There is a gap between the upper and lower impeller bodies. The diameter of the upper impeller body is larger than that of the lower impeller body.

[0011] The inner wall of the main housing is provided with a retaining ring, and the retaining ring is provided with a socket. The plug is inserted into the socket. The retaining ring is provided with a hollow. The enameled wire piercing terminal passes through the hollow and is inserted into the circuit board. The upper part of the enameled wire piercing terminal is provided with barbs on both sides. The upper part of the enameled wire piercing terminal is inserted into the socket at the lower end of the lower wire frame. The main housing and the connector are integrally formed. The outer shell of the main housing is provided with a shock-absorbing ring.

[0012] The upper part of the terminal block is provided with a socket with three insertion holes. The bottom of the terminal block is provided with a plug post b and a buckle. The plug post b and the buckle are mounted on the circuit board. The socket is provided with a Hall element, and the Hall bracket is located inside the lower bracket.

[0013] The technical solution of this utility model features a novel structure and a clever and simple design. It adopts a plastic-encapsulated injection-molded ferrite impeller design (new material, new process), which reduces the weight by 25% compared with similar products on the market, achieving a lightweight and low-carbon design. It uses a constant power water pump with linear changes in water pump flow and head, enabling precise flow control. The six-slot motor design has low starting torque and a starting current of less than 4A with no current spikes, resulting in low current and low impact on vehicle installation. The split connector design allows for multiple uses with one machine. Attached Figure Description

[0014] Figure 1 , 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 yes Figure 2 Schematic diagram of the structure in the AA section;

[0016] Figure 4 This is a schematic diagram of the structure of this utility model in an explosive state;

[0017] Figure 5 , 6 This is a schematic diagram of the structure of the volute of this utility model;

[0018] Figure 7 , 8 This is a schematic diagram of the main shell of this utility model;

[0019] Figure 9 , 10 11 and 17 are schematic diagrams of the structure of this utility model.

[0020] Figure 12 , 16 This is a schematic diagram of the structure of the lower wire frame of this utility model;

[0021] Figure 13 This is a schematic diagram of the stator assembly of this utility model;

[0022] Figure 14 This is a schematic diagram of the structure of the upper frame of this utility model;

[0023] Figure 15 This is a structural schematic diagram of the stator silicon steel sheet frame of this utility model;

[0024] Figure 18 This is a structural schematic diagram of the water-proof chamber assembly of this utility model;

[0025] Figure 19 , 21 This is a structural schematic diagram of the impeller assembly of this utility model;

[0026] Figure 20 yes Figure 19 Schematic diagram of the structure in the BB-direction section;

[0027] Figure 22 This is a schematic diagram of the structure of the enameled wire piercing the terminal of this utility model;

[0028] Figure 23 , 24 This is a schematic diagram of the structure of the Hall bracket of this utility model. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0030] like Figure 1 , 2 As shown in figures 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, and 24, an automotive electronic water pump includes a water inlet assembly 1 and a volute 9. The volute is made of PPS material and is connected to the vehicle's inlet and outlet water pipes. It is combined with an impeller to form a hydraulic structure. The water inlet assembly 1 has a central shaft 16, and the impeller assembly has an impeller bearing in the middle. The impeller assembly is installed in the water inlet assembly 1, and the impeller bearing is sleeved on the shaft 16. A thrust washer 2, made of metal, is provided on the surface of the impeller bearing to prevent the impeller bearing from wearing the volute structure. The water inlet assembly is made of a combination of metal and PPS material. The shaft guides the impeller movement. The water inlet separates the water pump's dry chamber and wet chamber. The water inlet assembly 1 has a volute 9, and a pipe is located in the middle of the volute 9. The lower inner wall of component a20 is provided with a pressure component 18 for fixing the thrust washer 2. The outer wall of the volute 9 is provided with a pipe component b19. The inner wall of the volute 9 is provided with an arc-shaped channel that communicates with the pipe component b19. The bottom of the water-proof chamber assembly 1 is provided with a stator assembly 10. The volute 9, the water-proof chamber assembly 1, and the main housing 13 are fixed by screws 7. The main housing 13 is made of PA66 material and supports and installs various components of the water pump. The bottom of the stator assembly 10 is provided with a lower wire frame 5. The bottom ring of the lower wire frame 5 is provided with a plug a and an enameled wire piercing terminal 11. The plug a is inserted into the main housing 14. The bottom of the main housing 11 is provided with a circuit board 12. The enameled wire piercing terminal 11 is inserted into the circuit board 12. The circuit board 12 is provided with a Hall bracket 3. The bottom side wall of the main housing 14 is provided with a connector 27 that is connected to the circuit board 12. The bottom of the main housing 14 is sealed by a rear cover 8.

[0031] The water-proof chamber assembly 1 has a cavity in the middle, the inner wall of the water-proof chamber assembly 1 forms an arc-shaped wall, the outer wall has a step, the step is provided with a volute sealing ring 4, and the edge of the water-proof chamber assembly 1 is provided with mounting holes.

[0032] The thrust washer 2 is a ring with three spring pieces on it. The bottom surface of the pressure piece 18 is smooth and has three notches that press the spring pieces.

[0033] The original stator assembly included an upper stator support, with a six-slot motor frame c on its inner wall. The inner side of the six-slot motor frame c was arc-shaped. The upper stator support was fitted onto the lower outer wall of the baffle assembly. The lower part of the baffle assembly was cylindrical, with its outer wall extending outward to form partitions. The six-slot motor frame c was accommodated between the partitions. The upper stator support had a notch on its outer ring, which engaged with the partitions. Below the upper stator support was a lower stator support, with a six-slot motor frame d on its inner side. The six-slot motor frames c and d were fitted together, and coils were fitted onto them. The stator assembly was the motor winding, and the six-slot design, together with the impeller rotor, formed the power structure.

[0034] The connection between the water-proof chamber assembly 1 and the main housing 14 is provided with a main housing sealing ring 13, and the main housing 14 and the rear cover 8 are welded together for sealing. The main housing sealing ring is made of EPDM material, which is the water pump dry chamber sealing component. The connector sealing ring is made of EPDM material, which is the water pump dry chamber sealing component. The volute sealing ring is made of EPDM material, which is the water pump water chamber sealing component.

[0035] The stator assembly includes an upper wire frame 22, with a six-slot motor frame a21 on the inner wall of the upper wire frame 22. A stop seat a24 is provided on the inner wall of the six-slot motor frame a21. The upper wire frame 22 is fitted onto the lower outer wall of the water-proof chamber assembly 1. The lower part of the water-proof chamber assembly 1 is cylindrical, and the six-slot motor frame a21 is housed outside the cylindrical body. A stator silicon steel sheet frame is provided below the stop seat a24. A six-slot stator frame 25 is provided on the stator silicon steel sheet frame. Below the stator silicon steel sheet frame is a lower wire frame 5. A six-slot stop seat b is provided on the lower wire frame 5. The six-slot stator frame 25 is located on the six-slot stop seat b. Coils are fitted onto the six-slot motor frame a21, the six-slot stator frame 25, and the six-slot stop seat b.

[0036] The impeller assembly includes an upper impeller body, which is connected to a lower impeller body via a graphite bearing 17. The graphite bearing 17 is located in the middle of the upper impeller body, and the graphite bearing 17 has blades 15 arranged obliquely from the inside to the outside. The lower impeller body is wrapped with ferrite, and the graphite bearing 17 is located in the middle of the lower impeller body. Ferrite 28 is injection molded through an outer plastic part 29. The bottom of the lower impeller body is hollow in the middle. There are five blades, which are evenly distributed and are arc-shaped. The outer plastic part 29 of the impeller is made of 0.5MM PPS shell. There is a gap between the upper impeller body and the lower impeller body. The diameter of the upper impeller body is larger than the diameter of the lower impeller body.

[0037] The inner wall of the main housing 14 is provided with a retaining ring 26, and the retaining ring 26 is provided with a socket. The plug is inserted into the socket. The retaining ring 26 is provided with a hollow. The enameled wire piercing terminal 11 passes through the hollow and is inserted into the circuit board 12. The upper part of the enameled wire piercing terminal 11 is provided with barbs on both sides. The upper part of the enameled wire piercing terminal 11 is inserted into the socket 23 at the lower end of the lower wire frame 5. The main housing 14 and the connector 27 are integrally formed. The main housing 14 is covered with a shock-absorbing ring 6.

[0038] The Hall bracket 3 has a socket on its upper part with three plug holes. The Hall bracket 3 has a plug post b and a buckle at its bottom. The plug post b and the buckle are installed on the circuit board 12. The socket has Hall components. The Hall bracket 3 is located inside the lower frame 5.

[0039] In use, the shock absorber ring 6 is made of EPDM material and is fixedly installed on the water pump assembly at the vehicle end. The circuit board 12 is a PCBA board containing the water pump controller. The rear cover 8 is made of PPS material to protect the water pump controller. The enameled wire piercing terminal 11 is used to connect the stator winding and the PCBA board. The lower wire frame 5 is used to connect to the vehicle signal PCBA. The electronic water pump is divided into a water chamber and a dry chamber by the water chamber assembly 1. The water chamber consists of a volute, a volute seal ring, an impeller assembly, and a thrust washer. The impeller is composed of a volute and a water-proof chamber assembly. The seal between the volute and the water-proof chamber assembly is a radial seal, which offers better sealing performance compared to a downward-pressure sealing ring structure and has lower requirements for the sealing ring's position. The impeller magnetic ring is made of injection-molded ferrite and rubber, with a magnetization strength of 2900GS. The impeller magnetic ring is further protected by a PPS plastic coating to prevent the injection-molded ferrite material from being corroded by the coolant. The dry chamber section houses the electronic water pump, electrical control, and motor components, consisting of the main housing, stator assembly, and P... The stator assembly consists of a CBA board, enameled wire piercing terminals, a main housing sealing ring, and a rear cover. It features a 6-slot design, requiring less starting torque and achieving a starting current of less than 4A at 20W. The lower frame is a split structure, allowing for interchangeability of different male terminals. Connection to the stator assembly utilizes enameled wire piercing terminals to pierce the enameled wire insulation, saving steps compared to resistance welding. The other end of the enameled wire piercing terminal is a fisheye terminal. The upper end of the shaft 16 is inserted into the pressure piece 18. The electronic water pump is connected to the vehicle signal via a controller, receiving vehicle commands to start, stop, and adjust the speed of the pump. The controller monitors the pump's operating status, determines if there are any abnormalities, and reports pump malfunctions via signal lines. The electronic water pump stator assembly and impeller magnetic ring form the motor structure, causing the impeller to rotate at high speed and generate centrifugal force. Coolant enters the impeller through the inlet, and centrifugal force pressurizes the liquid, guiding it through the volute to expel the coolant, thus achieving the function of delivering coolant.

[0040] It should be understood that the above description is only a preferred embodiment of the present utility model and is not sufficient to limit the technical solution of the present utility model. For those skilled in the art, within the spirit and principles of the present utility model, additions, subtractions, substitutions, transformations or improvements can be made based on the above description, and all such additions, subtractions, substitutions or improvements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An automotive electronic water pump, comprising a water chamber assembly (1) and a volute (9), characterized in that: The water-proof chamber assembly (1) has a machine shaft (16) at its center, and an impeller bearing is provided in the middle of the impeller assembly. The impeller assembly is installed in the water-proof chamber assembly (1), and the impeller bearing is sleeved on the machine shaft (16). A thrust washer (2) is provided on the surface of the impeller bearing. A volute (9) is provided on the water-proof chamber assembly (1). A pipe fitting a (20) is provided in the middle of the volute (9). A pressure piece (18) for fixing the thrust washer (2) is provided on the lower inner wall of the pipe fitting a (20). The machine shaft (16) passes through the pressure piece (18). A pipe fitting b (19) is provided on the outer wall of the volute (9). An arc-shaped channel is provided on the inner wall of the volute (9). The arc-shaped channel communicates with the pipe fitting b (19). The bottom of the assembly (1) is provided with a stator assembly, the volute (9), the water-proof chamber assembly (1) and the main housing (14) are fixed by screws a (7), the bottom of the stator assembly is provided with a lower wire frame (5), the bottom of the lower wire frame (5) is provided with a plug a and an enameled wire piercing terminal (11), the plug a is inserted into the main housing (14), the bottom of the main housing (14) is provided with a circuit board (12), the enameled wire piercing terminal (11) is inserted into the circuit board (12), the circuit board (12) is provided with a Hall bracket (3), the bottom side wall of the main housing (14) is provided with a connector (27), the connector is connected to the circuit board (12), and the bottom of the main housing (14) is sealed by a rear cover (8).

2. The automotive electronic water pump according to claim 1, characterized in that: The water-proof chamber assembly (1) has a cavity in the middle, the inner wall of the water-proof chamber assembly (1) forms an arc-shaped wall, the outer wall has a step, the step has a volute sealing ring (4), and the edge of the water-proof chamber assembly (1) has an installation hole.

3. The automotive electronic water pump according to claim 1, characterized in that: The thrust washer (2) is a ring with three spring pieces on it. The bottom surface of the pressure piece (18) is smooth and has three notches that press the spring pieces.

4. The automotive electronic water pump according to claim 1, characterized in that: The stator assembly includes an upper wire frame (22), with a six-slot motor frame a (21) on the inner wall of the upper wire frame (22), and a stop seat a (24) on the inner wall of the six-slot motor frame a (21). The upper wire frame (22) is fitted on the lower outer wall of the water-proof chamber assembly (1). The lower part of the water-proof chamber assembly (1) is cylindrical, and the six-slot motor frame a (21) is accommodated outside the cylindrical body. A stator silicon steel sheet frame is provided below the stop seat a (24), and a six-slot stator frame (25) is provided on the stator silicon steel sheet frame. A lower wire frame (5) is provided below the stator silicon steel sheet frame, and a six-slot stop seat b is provided on the lower wire frame (5). The six-slot stator frame (25) is located on the six-slot stop seat b. The six-slot motor frame a (21), the six-slot stator frame (25), and the six-slot stop seat b are fitted with coils.

5. The automotive electronic water pump according to claim 1, characterized in that: The connection between the water-proof chamber assembly (1) and the main housing (14) is provided with a main housing sealing ring (13), and the connection between the main housing (14) and the rear cover (8) is provided with a rear cover sealing ring. The main housing (14) and the rear cover (8) are fixed by screws b.

6. The automotive electronic water pump according to claim 1, characterized in that: The impeller assembly includes an upper impeller body, which is connected to a lower impeller body via a graphite bearing (17). The upper impeller body has a graphite bearing (17) in the middle, and the graphite bearing (17) has wheel plates (15) arranged from the inside to the outside. The wheel plates (15) are obliquely arranged. The lower impeller body is wrapped with ferrite. The lower impeller body has a graphite bearing (17) in the middle, and ferrite (28) is injection molded through an outer plastic part (29). The bottom of the lower impeller body is hollow. There are five wheel plates, which are evenly distributed and are arc-shaped. There is a gap between the upper impeller body and the lower impeller body. The diameter of the upper impeller body is larger than the diameter of the lower impeller body.

7. The automotive electronic water pump according to claim 1, characterized in that: The inner wall of the main housing (14) is provided with a retaining ring (26), and the retaining ring (26) is provided with a socket. The plug is inserted into the socket. The retaining ring (26) is provided with a hollow. The enameled wire piercing terminal (11) passes through the hollow and is inserted into the circuit board (12). The upper part of the enameled wire piercing terminal (11) is provided with barbs on both sides. The upper part of the enameled wire piercing terminal (11) is inserted into the socket (23) at the lower end of the lower wire frame (5). The main housing (14) and the connector (27) are integrally formed. The main housing (14) is provided with a shock-absorbing ring (6) on the outer sleeve.

8. The automotive electronic water pump according to claim 1, characterized in that: The Hall bracket (3) is provided with a socket on the upper part, and the socket has three plug holes. The Hall bracket (3) is provided with a plug post b and a buckle at the bottom. The plug post b and the buckle are installed on the circuit board (12). The socket is provided with Hall components. The Hall bracket (3) is located inside the lower frame (5).

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