Automobile electronic water pump

Abstract

The invention relates to automobile parts, in particular to an automobile electronic water pump. An automobile electronic water pump comprises a waterproof chamber assembly and a volute, a crankshaft is arranged in the center of the waterproof chamber assembly, an impeller bearing is arranged in the middle of an impeller assembly, the impeller assembly is installed in the waterproof chamber assembly, the crankshaft is sleeved with the impeller bearing, a thrust washer is arranged on the surface of the impeller bearing, the volute is arranged on the waterproof chamber assembly, and a pipe a is arranged in the middle of the volute. A pressing piece used for fixing a thrust washer is arranged on the inner wall of the lower portion of the pipe fitting a, a pipe fitting b is arranged on the outer wall of the volute, an arc-shaped channel is formed in the inner wall of the volute and communicated with the pipe fitting b, a stator assembly is arranged at the bottom of the waterproof chamber assembly, the volute, the waterproof chamber assembly and the main shell are fixed through a screw a, and a connector assembly is arranged at the bottom of the stator assembly. The invention has the beneficial effects that the six-slot motor design is adopted, the starting torque is small, the starting current is less than 4A, no current peak exists, the current is low, and the impact on loading is low; and the connector is designed in a split manner, so that multiple purposes can be realized.

Description

Technical Field

[0001] The present invention relates to automotive components, particularly an automotive electronic water pump. Background Art

[0002] The self-weight of water pumps on the market is relatively large, increasing the energy consumption of the vehicle. Most water pumps are constant-speed water pumps, with relatively small changes in flow and head in the early stage and unable to be precisely controlled. The starting current of the water pump is too large, posing a risk of burning the automotive fuse. The water pump connector is of an integrated design and cannot be used in multiple applications. Most electronic water pumps have a constant-speed control logic, with relatively slow changes in flow and head in the early stage and unable to achieve precise control. The starting current is about 3A or more, having a greater impact on the vehicle's insurance. The integrated connector design requires significant changes when matching new vehicle models. Summary of the Invention

[0003] In order to solve the above technical problems with a greater impact, the present invention provides an automotive electronic water pump.

[0004] The technical solution of the present invention is as follows: An automotive electronic water pump includes a water isolation chamber assembly and a volute. A machine shaft is provided at the center of the water isolation chamber assembly. An impeller bearing is provided in the middle of the impeller assembly. The impeller assembly is installed in the water isolation chamber assembly. The impeller bearing is sleeved on the machine shaft. A thrust washer is provided on the surface of the impeller bearing. A volute is provided on the water isolation chamber assembly. A pipe fitting a is provided in the middle of the volute. A pressing member for fixing the thrust washer is provided on the inner wall of the lower part of the pipe fitting a. A pipe fitting b is provided on the outer wall of the volute. An arc-shaped channel is provided on the inner wall of the volute and is communicated with the pipe fitting b. A stator assembly is provided at the bottom of the water isolation chamber assembly. The volute, the water isolation chamber assembly, and the main housing are fixed by screw a. A wire harness frame is provided at the bottom of the stator assembly. Plug posts a and enameled wire piercing terminals are annularly provided at the bottom of the wire harness frame. The plug post a is inserted into the main housing. A circuit board is provided at the bottom of the main housing. The enameled wire piercing terminal is inserted into the circuit board. A Hall bracket is provided on the circuit board. A connector is provided on the side wall at the bottom of the main housing. The bottom of the main housing is sealed by a rear cover.

[0005] A chamber is provided in the middle of the water isolation chamber assembly. An arc-shaped wall body is formed on the inner wall of the water isolation chamber assembly. A step is provided on the outer wall, and a volute sealing ring is provided on the step. Mounting holes are provided at the edge of the water isolation chamber assembly.

[0006] The thrust washer is a ring body, and three elastic pieces are provided on the ring body. The bottom surface of the pressing member is smooth, and three notches are provided on the pressing member, and the notches press the elastic pieces.

[0007] The stator assembly includes an upper wire rack, a six-slot motor rack a is provided on the inner wall of the upper wire rack, a stopper a is provided on the inner wall of the six-slot motor rack a, the stator upper bracket is sleeved on the lower outer wall of the watertight chamber assembly, the lower part of the watertight chamber assembly is a cylinder, and the six-slot motor rack a is accommodated outside the cylinder, a stator silicon steel sheet rack is provided below the stopper a, the stator silicon steel sheet rack is provided with a six-slot stator rack, and a lower wire rack is provided below the stator silicon steel sheet rack, a connector assembly is provided with a six-slot stopper b, the six-slot stator rack is located on the six-slot stopper b, and the six-slot motor rack a, the six-slot stator rack and the six-slot stopper b are sleeved with coils.

[0008] A main shell sealing ring is provided at the connection between the watertight chamber assembly and the main shell, and a rear cover sealing ring is provided at the connection between the main shell and the rear cover. The main shell and the rear cover are fixed by screws b, and the main shell and the rear cover are welded and sealed.

[0009] The impeller assembly includes an impeller upper body, which is connected to an impeller lower body through a graphite bearing. A graphite bearing is located in the middle of the impeller upper body. The graphite bearing is provided with blades from the inside to the outside, and the blades are arranged obliquely. The impeller lower body is wrapped with ferrite. A graphite bearing is located in the middle of the impeller lower body. Ferrite is injection-molded through an impeller outer plastic part. The bottom of the middle of the impeller lower body is hollow. There are five blades that are evenly distributed and are in an arc shape. The impeller outer plastic part uses a 0.5MM PPS shell. There is a gap between the impeller upper body and the impeller lower body. The diameter of the impeller upper body is larger than the diameter of the impeller lower body.

[0010] The inner wall ring of the main shell is provided with a retaining ring, and a socket is provided on the retaining ring. The plug post is inserted into the socket, and the retaining ring is provided with a hollow. The enameled wire piercing terminal passes through the hollow and is inserted into the circuit board. Barbs are provided on both sides of the upper part of the enameled wire piercing terminal, and the upper part of the enameled wire piercing terminal is inserted into the socket at the lower end of the lower wire rack. The main shell and the connector are integrally formed, and a shock-absorbing ring is provided on the outer jacket of the main shell.

[0011] The upper part of the terminal block is provided with a wire socket, which is provided with three wire holes. The bottom of the terminal block is provided with a plug post b and a buckle, which are installed on the circuit board. The wire socket is provided with a Hall component, and the Hall bracket is located on the inner side of the lower wire rack.

[0012] The technical solution of the present invention has a novel structure, ingenious and simple design, and adopts a plastic-wrapped injection-molded ferrite impeller design (new material, new process). The weight is 25% lower than that of similar products on the market, and it is a lightweight and low-carbon design. A constant-power water pump is adopted, and the flow rate and head of the water pump change linearly, so that precise flow control can be achieved. The six-slot motor design has a small starting torque, a starting current of less than 4A, no current spikes, low current, and low impact on loading. The split design of the connector can enable one machine to have multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , 2 It is a schematic diagram of the structure of the present invention; Figure 3 is Figure 2 a schematic structural view of the A-A sectional view in Figure 4 is a schematic structural view of the explosion state of the present invention; Figure 5 and 6 is a schematic structural view of the volute of the present invention; Figure 7 and 8 is a schematic structural view of the main housing of the present invention; Figure 9 and 10 11, 17 are schematic structural views of parts of the present invention; Figure 12 and 16 is a schematic structural view of the lower wire rack of the present invention; Figure 13 is a schematic structural view of the stator assembly of the present invention; Figure 14 is a schematic structural view of the upper wire rack of the present invention; Figure 15 is a schematic structural view of the stator silicon steel sheet rack of the present invention; Figure 18 is a schematic structural view of the water isolation chamber assembly of the present invention; Figure 19 and 21 is a schematic structural view of the impeller assembly of the present invention; Figure 20 is Figure 19 a schematic structural view of the B-B sectional view in Figure 22 is a schematic structural view of the enameled wire piercing terminal of the present invention; Figure 23 and 24 is a schematic structural view of the Hall bracket of the present invention. Detailed implementation manners

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Embodiment

[0015] As Figure 1 and 2, an automotive electric water pump shown in Figures 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, includes a water isolation chamber assembly 1 and a volute 9. The volute is made of PPS material, connected to the vehicle's inlet and outlet water pipes, and forms a hydraulic structure with the impeller. A machine shaft 16 is provided at the center of the water isolation chamber assembly 1. An impeller bearing 17 is provided in the middle of the impeller assembly. The impeller assembly is installed in the water isolation chamber assembly 1. The impeller bearing 17 is sleeved on the machine shaft 16. A thrust washer 10 is provided on the surface of the impeller bearing 17. The thrust washer is made of metal to prevent the impeller bearing from wearing the volute structure. The material of the water isolation chamber assembly includes metal + PPS material. The machine shaft guides the movement of the impeller. The water isolation chamber separates the dry chamber and the wet chamber of the water pump. A volute 9 is provided on the water isolation chamber assembly 1. A pipe fitting a 20 is provided in the middle of the volute 9. A pressing part 18 for fixing the thrust washer 10 is provided on the inner wall of the lower part of the pipe fitting a 20. 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, which is communicated with the pipe fitting b 19. A stator assembly 10 is provided at the bottom of the water isolation chamber assembly 1. The volute 9, the water isolation chamber assembly 1 and the main housing 13 are fixed by screws 7. The main housing 13 is made of PA66 material, supporting and installing each component of the water pump. A wire winding frame 5 is provided at the bottom of the stator assembly 10. Plug posts a and enameled wire piercing terminals 11 are provided in a ring shape at the bottom of the wire winding frame 5. The plug post a is inserted into the main housing 10. A circuit board 12 is provided at the bottom of the main housing 11. The enameled wire piercing terminal 11 is inserted into the circuit board 12. A Hall bracket 3 is provided on the circuit board 12. A connector 27 is provided on the side wall at the bottom of the main housing 14. The connector is connected to the circuit board 12. The bottom of the main housing 14 is sealed by a rear cover 8.

[0016] A chamber is provided in the middle of the water isolation chamber assembly 1. An arc-shaped wall body is formed on the inner wall of the water isolation chamber assembly 1. A step is provided on the outer wall, and a volute sealing ring 12 is provided on the step. Mounting holes are provided at the edge of the water isolation chamber assembly 1.

[0017] The thrust washer 10 is a ring body. Three elastic pieces are provided on the ring body. The bottom surface of the pressing part 18 is smooth. Three notches are provided on the pressing part 18, and the notches press the elastic pieces.

[0018] The stator assembly includes a stator upper bracket 22. Six-slot motor brackets a 21 are provided on the inner wall of the stator upper bracket 22. The inner sides of the six-slot motor brackets a 21 are arc-shaped. The stator upper bracket 22 is sleeved on the outer wall of the lower part of the water isolation chamber assembly 1. The lower part of the water isolation chamber assembly 1 is a cylinder. A partition piece extends outward from the outer wall of the cylinder. The six-slot motor brackets 21 are accommodated between the partition pieces. A notch 23 is provided on the outer ring of the stator upper bracket 22, and the notch 23 is stuck on the partition piece. A stator lower bracket 24 is provided below the stator upper bracket 22. Six-slot motor brackets b 25 are provided on the inner side of the stator lower bracket 24. The six-slot motor brackets a 21 and the six-slot motor brackets b 25 are attached to each other up and down. Coils are sleeved on the six-slot motor brackets a 21 and the six-slot motor brackets b 25. The stator assembly is a motor winding. The six-slot design forms a power structure with the impeller rotor.

[0019] The connection between the water-proof chamber assembly 1 and the main housing 14 is provided with a main housing seal ring 13, and the main housing 14 and the rear cover 8 are welded and sealed. The main housing seal ring is made of EPDM material, the water pump dry chamber seal component, the connector seal ring is made of EPDM material, the water pump dry chamber seal component, the volute seal ring is made of EPDM material, and the water pump water chamber seal component.

[0020] The stator assembly includes an upper wire rack 22, the inner wall of which is provided with a six-slot motor rack a21, the inner wall of which is provided with a block seat a24, the stator upper bracket 22 is sleeved on the lower outer wall of the watertight chamber assembly 1, the lower part of the watertight chamber assembly 1 is in the form of a cylinder, and the six-slot motor rack a21 is accommodated outside the cylinder, a stator silicon steel sheet frame 9 is provided below the block seat a24, the stator silicon steel sheet frame 9 is provided with a six-slot stator frame 25, and a lower wire rack 5 is provided below the stator silicon steel sheet frame 9, the connector assembly 5 is provided with a six-slot block seat b, the six-slot stator frame 25 is located on the six-slot block seat b, and the six-slot motor frame a21, the six-slot stator frame 25 and the six-slot block seat b are sleeved with coils.

[0021] The impeller assembly includes an impeller upper body, which is connected to the impeller lower body through a graphite bearing 17. The graphite bearing 17 is located in the middle of the impeller upper body. The graphite bearing 17 is provided with wheel blades 15 from the inside to the outside. The wheel blades 15 are arranged obliquely. The impeller lower body is wrapped with ferrite. The graphite bearing 17 is located in the middle of the impeller lower body. Ferrite 28 is injection molded through the impeller outer plastic part 29. The bottom of the middle of the impeller lower body is hollow. There are five wheel blades, which are evenly distributed and are in an arc shape. The impeller outer plastic part 29 adopts a 0.5MM PPS shell. There is a gap between the impeller upper body and the impeller lower body. The diameter of the impeller upper body is larger than the diameter of the impeller lower body.

[0022] The inner wall of the main shell 14 is provided with a retaining ring 26, and a plug hole is provided on the retaining ring 26, and the plug column is inserted into the plug hole. The retaining ring 26 is hollowed out, and the enameled wire piercing terminal 11 passes through the hollowed out part and is inserted into the circuit board 12. Barbs are provided on both sides of the upper part of the enameled wire piercing terminal 11, and the upper part of the enameled wire piercing terminal 11 is inserted into the socket 23 at the lower end of the lower wire rack 5. The main shell 14 and the connector 27 are integrally formed, and a shock-absorbing ring 6 is provided on the outer cover of the main shell 14.

[0023] The Hall bracket 3 is provided with a wire socket on the upper part, and three wire socket holes are provided on the wire socket. The bottom of the Hall bracket 3 is provided with a plug post b and a buckle, and the plug post b and the buckle are installed on the circuit board 12. The wire socket is provided with Hall components, and the Hall bracket 3 is located on the inner side of the lower wire rack 5.

[0024] During use, the shock-absorbing ring 6 is made of EPDM material and is fixedly installed on the vehicle end of the water pump assembly. The circuit board 12 is a PCBA board, which is 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 offline bracket 5 is used to connect to the vehicle signal machine PCBA. The electric water pump is divided into two parts, namely the water chamber and the dry chamber, by the water isolation chamber assembly 1. The water chamber part consists of a volute, a volute sealing ring, an impeller assembly, a thrust washer and the water isolation chamber assembly. The seal between the volute and the water isolation chamber assembly is carried out by radial sealing. This structure has a better sealing effect compared with the downward pressure sealing ring structure and has lower requirements for the position of the sealing ring. The impeller magnetic ring is formed by injection molding of ferrite and rubber compound, and its magnetization intensity is 2900 GS. In addition, there is a PPS plastic coating structure outside the impeller magnetic ring to protect the injection-molded ferrite material from being eroded by the coolant. The dry chamber part is the electric control and motor part of the electric water pump, which consists of a main housing, a stator assembly, a PCBA board, an enameled wire piercing terminal, a main housing sealing ring and a rear cover, etc. The stator assembly adopts a 6-slot design, and the starting torque required by the motor is small. When the power is 20W, the starting current is less than 4A. The offline bracket becomes a split structure and can be replaced for different male terminals. The connection with the stator assembly uses the enameled wire piercing terminal to pierce the insulation layer of the enameled wire, which saves processes compared with resistance welding. The other end of the enameled wire piercing terminal is a fish-eye terminal. The upper end of the machine shaft 16 passes through the pressing part 18. The electric water pump is connected to the vehicle signal through the controller, receives vehicle instructions, and performs start-stop, speed regulation and other working instructions on the electric water pump. The controller monitors the working state of the electric water pump to determine whether the water pump is working abnormally and reports the water pump fault through the signal line. The stator assembly and the impeller magnetic ring part of the electric water pump form a motor structure to make the impeller of the impeller water pump rotate at a high speed to generate centrifugal force. The coolant enters the water passing surface of the impeller from the water inlet, pressurizes the liquid through centrifugal force and guides it through the volute to discharge the coolant, realizing the function of transporting the coolant.

[0025] It should be understood that the above are only the preferred embodiments of the present invention and are not sufficient to limit the technical solutions of the present invention. For those of ordinary skill in the art, within the spirit and principles of the present invention, additions, substitutions, transformations or improvements can be made according to the above description, and all these technical solutions after the additions, substitutions, transformations or improvements should fall within the protection scope of the appended claims of the present invention.

Claims

1. An automotive electronic water pump, comprising a water-isolating chamber assembly (1) and a volute (9), characterized in that: The watertight chamber assembly (1) is provided with a machine shaft (16) at the center, an impeller bearing (17) is provided in the middle of the impeller assembly (11), the impeller assembly (11) is installed in the watertight chamber assembly (1), the impeller bearing (17) is sleeved on the machine shaft (16), a thrust washer (10) is provided on the surface of the impeller bearing (17), a volute (9) is provided on the watertight chamber assembly (1), a pipe a (20) is provided in the middle of the volute (9), a pressing piece (18) for fixing the thrust washer (10) is provided on the inner wall of the lower part of the pipe a (20), the machine shaft (16) penetrates the pressing piece (18), a pipe 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), and the arc-shaped channel and the pipe b (19) are connected to each other. b (19), a stator assembly is provided at the bottom of the watertight chamber assembly (1), the volute (9), the watertight chamber assembly (1) and the main housing (14) are fixed by screws a (7), a lower wire rack (5) is provided at the bottom of the stator assembly, a plug a and an enameled wire piercing terminal (11) are provided at the bottom ring of the lower wire rack (5), the plug a is inserted into the main housing (14), a circuit board (12) is provided at the bottom of the main housing (14), the enameled wire piercing terminal (11) is inserted into the circuit board (12), a Hall bracket (3) is provided on the circuit board (12), a connector (27) is provided on the bottom side wall of the main housing (14), 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 watertight chamber assembly (1) has a chamber in the middle, the inner wall of the watertight chamber assembly (1) forms an arc-shaped wall body, the outer wall is provided with a step, a volute sealing ring (4) is provided on the step, and a mounting hole is provided on the edge of the watertight chamber assembly (1).

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

4. The automotive electronic water pump according to claim 1, characterized in that: The stator assembly comprises an upper wire frame (22), the inner wall of the upper wire frame (22) is provided with a six-slot motor frame a (21), the inner wall of the six-slot motor frame a (21) is provided with a stopper a (24), the stator upper frame (22) is sleeved on the outer wall of the lower part of the water-proof chamber assembly (1), the lower part of the water-proof chamber assembly (1) is in the form of a cylinder, and the six-slot motor frame a (21) is accommodated outside the cylinder, a stator silicon steel sheet frame (9) is provided below the stopper a (24), the stator silicon steel sheet frame (9) is provided with a six-slot stator frame (25), and a lower wire frame (5) is provided below the stator silicon steel sheet frame (9), the connector assembly (5) is provided with a six-slot stopper b, the six-slot stator frame (25) is located on the six-slot stopper b, and the six-slot motor frame a (21), the six-slot stator frame (25) and the six-slot stopper b are sleeved with coils.

5. The automotive electronic water pump according to claim 1, characterized in that: A main housing sealing ring (13) is provided at the connection between the watertight chamber assembly (1) and the main housing (14), and a rear cover sealing ring is provided at the connection between the main housing (14) and the rear cover (8). 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 comprises an impeller upper body, the impeller upper body is connected to the impeller lower body via a graphite bearing (17), the graphite bearing (17) is located in the middle of the impeller upper body, the graphite bearing (17) is provided with blades (15) from the inside to the outside, the blades (15) are arranged obliquely, the impeller lower body is wrapped with ferrite, the graphite bearing (17) is located in the middle of the impeller lower body, the ferrite (28) is injection molded through the impeller outer plastic part (29), the bottom of the middle of the impeller lower body is hollow, the number of the blades is five, which are evenly distributed, and the blades are in an arc shape, the impeller outer plastic part (29) adopts a 0.5MM PPS shell, there is a gap between the impeller upper body and the impeller lower body, and the diameter of the impeller upper body is larger than the diameter of the impeller lower 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), the retaining ring (26) is provided with an insertion hole, the insertion column is inserted into the insertion hole, 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 (28), 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 rack (5), the main housing (14) and the connector (27) are integrally formed, and the outer cover of the main housing (14) is provided with a shock absorbing ring (6).

8. The automotive electronic water pump according to claim 1, characterized in that: The Hall bracket (3) is provided with a plug socket on the top, and three plug holes are provided on the plug socket. The bottom of the Hall bracket (3) is provided with a plug post b and a buckle, and the plug post b and the buckle are mounted on the circuit board (12). The plug socket is provided with a Hall component, and the Hall bracket (3) is located on the inner side of the lower wire rack (5).

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