New type of automotive electronic water pump with detachable impeller

Abstract

The utility model provides a novel automobile electronic water pump with detachable impeller, through setting detachable impeller in the upper cavity part of pump cavity, compared with the impeller of integral moulding through powder injection in prior art, detachable impeller has higher flexibility and maintainability, when the impeller appears wear and tear or failure due to long -term use or other reasons, need not to replace whole water pump, only need to dismount and replace impeller part, greatly reduced maintenance cost and replacement difficulty, in addition, the buckle connection between impeller body and impeller shell not only is simple and quick to install, but also is convenient to dismount and replace, improves maintenance efficiency, this design makes automobile electronic water pump more reliable in the process of using, prolongs the service life of water pump, and the speed of impeller in automobile electronic water pump on the market is generally 2500-3000 revolutions per minute, therefore detachable impeller in the design will not cause the connection part to be loose or be damaged because of excessively high speed, guarantees the stable operation of water pump.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically to a novel automotive electronic water pump with a detachable impeller. Background Technology

[0002] In existing technologies, the external rotor impeller in automotive electronic water pumps is typically integrally injection molded with magnetic powder. This structure means that if the impeller is damaged, the entire external rotor impeller needs to be replaced, increasing maintenance costs and inconvenience. Furthermore, the stability and durability of magnetically powder-injected impellers are relatively limited, making it difficult to meet the demands of long-term high-load operation. Additionally, existing magnetically powder-injected impellers have poor high-temperature resistance, making them prone to deformation in high-temperature environments, which can affect the magnetic field. Summary of the Invention

[0003] In view of this, the present invention provides a novel automotive electronic water pump with a detachable impeller.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A novel automotive electronic water pump with a detachable impeller includes a pump body and a pump cover. The pump cover is disposed on the pump body, and a pump cavity is formed between the pump body and the pump cover. An outer rotor mounting part is disposed on the inner wall of the pump cavity, and the outer rotor mounting part divides the pump cavity into an upper cavity and a lower cavity. A detachable impeller is disposed in the upper cavity and is fixed to the outer rotor mounting part. The detachable impeller includes an impeller body and an impeller housing, and the impeller body and the impeller housing are snap-fit ​​connected.

[0006] Preferably, the impeller body has a blade portion and a housing mounting portion. A mounting groove is formed on the impeller housing. The housing mounting portion of the impeller body extends into the mounting groove and connects with the impeller housing. A snap-fit ​​structure protrudes from the housing mounting portion. A snap-fit ​​through hole is formed in the groove wall of the mounting groove. The snap-fit ​​structure extends into the snap-fit ​​through hole and snaps with the impeller housing.

[0007] Preferably, the housing mounting portion is arranged in an annular structure on the end face of the blade portion near the impeller housing. The snap-fit ​​structure protrudes from the end face of the housing mounting portion away from the blade portion. The snap-fit ​​structure protrudes in a direction away from the central axis of the housing mounting portion to form a snap-fit ​​end. A first guide slope is provided on the lower part of the snap-fit ​​end near the snap-fit ​​through hole. A second guide slope is formed on the upper part of the snap-fit ​​end extending towards the outer wall of the housing mounting portion.

[0008] Preferably, a plurality of equally spaced magnetic steel limiting parts protrude from the inner wall of the housing mounting part, and magnetic steel limiting grooves are formed between adjacent magnetic steel limiting parts. One side of the buckle structure extends to the bottom of the magnetic steel limiting part and connects with the magnetic steel limiting part.

[0009] Preferably, the bottom of the impeller housing is bent toward the center of the impeller housing to form a magnet support.

[0010] Preferably, the buckle through hole is square-shaped, and the upper part of the inner wall on both sides of the buckle through hole is provided with a rounded corner structure.

[0011] Preferably, a stator assembly is disposed in the lower cavity. The stator assembly includes a control board, a stator winding, and a Hall element. The control board is connected to the Hall element and senses the signal of the stator winding through the Hall element.

[0012] The beneficial effects of this invention are as follows: By installing a detachable impeller in the upper chamber of the pump cavity, the detachable impeller offers greater flexibility and maintainability compared to the impellers integrally molded by powder injection in the prior art. When the impeller wears or malfunctions due to long-term use or other reasons, it is not necessary to replace the entire water pump; only the impeller needs to be disassembled and replaced, greatly reducing maintenance costs and replacement difficulty. Furthermore, the snap-fit ​​connection between the impeller body and the impeller housing is not only simple and quick to install but also facilitates disassembly and replacement, improving maintenance efficiency. This design makes the automotive electronic water pump more reliable during use and extends its service life. Moreover, since the impeller speed in most automotive electronic water pumps on the market is currently around 4000 rpm, the detachable impeller in this design will not cause the connection to loosen or be damaged due to excessive speed, ensuring stable operation of the water pump. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Appendix Figure 1 This is a schematic diagram of a detachable impeller structure.

[0015] Appendix Figure 2 For the appendix Figure 1 Structural breakdown diagram;

[0016] Appendix Figure 3 For the appendix Figure 2 Another angle diagram;

[0017] Appendix Figure 4 This is a schematic diagram of an automotive electronic water pump. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] This utility model provides the following technical solution:

[0021] As attached Figure 1-4 As shown, this utility model discloses a novel automotive electronic water pump with a detachable impeller, including a pump body 1 and a pump cover 2. The pump cover 2 is disposed on the pump body 1, and a pump cavity 3 is formed between the pump body 1 and the pump cover 2. An outer rotor mounting part 4 is disposed on the inner wall of the pump cavity 3, and the outer rotor mounting part 4 divides the pump cavity 3 into an upper cavity 5 and a lower cavity 6. A detachable impeller 7 is disposed in the upper cavity 5, and the detachable impeller 7 is fixed to the outer rotor mounting part 4. The detachable impeller 7 includes an impeller body 8 and an impeller housing 9, and the impeller body 8 and the impeller housing 9 are snap-fitted together. Specifically, in this design, by providing a detachable impeller in the upper cavity 5 of the pump cavity 3, the detachable impeller has higher flexibility and maintainability compared to the impellers integrally molded by powder injection in the prior art. When the impeller wears or fails due to long-term use or other reasons, it is not necessary to replace the entire water pump; only the impeller part needs to be disassembled and replaced, which greatly reduces maintenance costs and replacement difficulty. Furthermore, the snap-fit ​​connection between the impeller body 8 and the impeller housing 9 not only makes installation simple and quick but also facilitates disassembly and replacement, improving maintenance efficiency. This design makes the automotive electronic water pump more reliable during use and extends its service life. Moreover, since the impeller speed in most automotive electronic water pumps on the market is currently around 4000 rpm, the detachable impeller 7 in this design will not cause the connection to loosen or be damaged due to excessive speed, ensuring stable operation of the water pump. The separate impeller also offers superior performance. This structure allows for a wider range of magnet performance adjustment. Compared to the existing injection-molded integrated structure, the detachable rotor structure in this design can be made smaller for the same power, thus reducing costs. Furthermore, the impeller blades in this design can be made into complex structures to improve efficiency according to different needs, while the injection-molded integrated structure is limited by the manufacturing process and can only make simple blades with a small number, resulting in very low impeller efficiency. The detachable structure uses independent magnets, which have a higher temperature resistance and are more stable, while the injection-molded integrated structure is often limited by the temperature resistance requirements of the plastic, resulting in magnetic field instability or failure.

[0022] The impeller body is made of PPS + glass fiber material. This material eliminates the need for bearings on the impeller itself, ensuring excellent self-lubrication between the impeller body and the impeller shaft, reducing wear, and extending service life. Simultaneously, this material also possesses high strength and rigidity, capable of withstanding heavy workloads and ensuring stable operation of the automotive electric water pump. Furthermore, the PPS + glass fiber material exhibits excellent corrosion resistance and high-temperature resistance, adapting to the needs of automotive electric water pumps in various operating environments, further enhancing the reliability and durability of the pump.

[0023] Furthermore, the impeller body 8 has a blade portion 10 and a housing mounting portion 11. A mounting groove 12 is formed on the impeller housing 9. The housing mounting portion 11 of the impeller body 8 extends into the mounting groove 12 and connects with the impeller housing 9. A snap-fit ​​structure 13 protrudes from the housing mounting portion 11. A snap-fit ​​through hole 14 is formed in the groove wall of the mounting groove 12. The snap-fit ​​structure 13 extends into the snap-fit ​​through hole 14 and snaps into the impeller housing 9. Specifically, in this embodiment, the housing mounting portion 11 of the impeller body 8 engages with the impeller housing 9 by extending into the mounting groove 12, and the snap-fit ​​structure 13 connects with the snap-fit ​​through hole 14, achieving a stable connection between the impeller body 8 and the impeller housing 9. This snap-fit ​​connection method is not only simple in structure but also firmly connected, effectively preventing loosening due to vibration or water flow impact during use. Meanwhile, the snap-fit ​​structure 13 makes the disassembly process more convenient. The impeller body 8 can be separated from the impeller housing 9 with simple operation, which facilitates the maintenance and replacement of the impeller.

[0024] Furthermore, the housing mounting part 11 extends into the mounting groove 12 and has an interference fit with the impeller housing to ensure that the impeller body and the impeller housing will not loosen due to vibration or centrifugal force during high-speed rotation, further improving the stability and reliability of the connection. In addition, the interference fit design can also effectively prevent the water pump from experiencing performance degradation due to liquid leakage during operation, ensuring the normal operation of the water pump.

[0025] Furthermore, the housing mounting portion 11 is arranged in an annular structure on the end face of the blade portion 10 near the impeller housing 9. The snap-fit ​​structure 13 protrudes from the end face of the housing mounting portion 11 away from the blade portion 10. The snap-fit ​​structure 13 protrudes in a direction away from the central axis of the housing mounting portion 11 to form a snap-fit ​​end 15. A first guide slope 16 is provided on the lower part of the snap-fit ​​end 15 near the snap-fit ​​through hole 14, and a second guide slope 17 is formed on the upper part of the snap-fit ​​end 15 extending towards the outer wall of the housing mounting portion 11. Specifically, in this embodiment, the annular structure design of the housing mounting portion 11 not only enhances the connection strength between the impeller body 8 and the impeller housing 9, but also makes the distribution of the snap-fit ​​structure 13 more uniform, thereby ensuring the stability and balance of the impeller during high-speed rotation. The snap-fit ​​structure 13 protrudes in a direction away from the central axis of the housing mounting portion 11 to form the snap-fit ​​end 15. This design allows the snap-fit ​​end 15 to be inserted into the snap-fit ​​through hole 14 more smoothly, avoiding installation difficulties caused by jamming. Meanwhile, the first guide slope 16 located on the lower part of the snap-fit ​​end 15 near the snap-fit ​​through hole 14, and the second guide slope 17 extending from the upper part of the snap-fit ​​end 15 towards the outer wall of the housing mounting part 11, further simplify the installation process. This allows the impeller body 8 and the impeller housing 9 to automatically align and snap together during installation, greatly improving installation efficiency and accuracy. Furthermore, this guide slope design also helps guide the snap-fit ​​structure 13 to smoothly disengage from the snap-fit ​​through hole 14 during disassembly, thus enabling rapid disassembly of the impeller body 8 and the impeller housing 9, providing great convenience for pump maintenance and replacement.

[0026] Furthermore, a plurality of equally spaced magnetic steel limiting portions 18 protrude from the inner wall of the outer casing mounting portion 11, and magnetic steel limiting grooves 19 are formed between adjacent magnetic steel limiting portions 18. One side of the snap-fit ​​structure 13 extends to the bottom of the magnetic steel limiting portion 18 and connects with it. Specifically, in this embodiment, the magnetic steel limiting portions 18 protruding from the inner wall of the outer casing mounting portion 11 are mainly used to fix the magnet 20, ensuring that the magnet 20 can maintain a stable position during impeller rotation and preventing displacement or detachment. The design of the magnetic steel limiting portions 18 not only improves the fixing effect of the magnet, but also ensures the dynamic balance of the impeller during high-speed rotation, further enhancing the performance and stability of the water pump. The magnetic steel limiting grooves 19 formed between adjacent magnetic steel limiting portions 18 provide precise positioning and support for the installation of the magnet, allowing the magnet to be firmly installed on the outer casing mounting portion 11. The design of the snap-fit ​​structure 13 extending to the bottom of the magnet limiting part 18 and connecting with it forms a structure that functions similarly to a reinforcing rib. This enhances the connection strength between the snap-fit ​​structure 13 and the housing mounting part 11, making the entire impeller structure more stable and reliable. This design not only improves the impeller's vibration resistance during high-speed rotation but also ensures the stability and durability of the water pump during long-term operation.

[0027] Furthermore, the bottom of the impeller housing 9 is bent towards its center to form a magnet support portion 21. Specifically, in this embodiment, the magnet support portion 21 formed by bending the bottom of the impeller housing 9 towards its center primarily functions to provide additional support for the magnet, ensuring that the magnet maintains a stable position during impeller rotation. The design of the magnet support portion 21 further enhances the magnet's fixation effect, preventing possible displacement or detachment of the magnet during high-speed rotation, thereby ensuring the dynamic balance of the impeller and the performance stability of the water pump. In addition, the bending design of the magnet support portion 21 makes the entire impeller structure more compact, reducing space occupation and facilitating the miniaturization and lightweight design of automotive electronic water pumps.

[0028] Furthermore, the snap-fit ​​through hole 14 is square-shaped, and rounded corner structures 22 are provided on the upper part of the inner walls on both sides of the snap-fit ​​through hole 14. Specifically, in this embodiment, the rounded corner structures 22 on the inner walls of the snap-fit ​​through hole 14 can prevent rotation. At the same time, this rounded corner structure 22 design can also provide a certain guiding effect when the snap-fit ​​structure 13 and the snap-fit ​​through hole 14 are snapped together, making the snap-fit ​​process smoother and avoiding installation difficulties caused by jamming.

[0029] Furthermore, a stator assembly is disposed within the lower cavity 6. The stator assembly includes a control board 23, a stator winding 24, and a Hall element (not shown). The control board 23 is connected to the Hall element, which senses the signal from the stator winding 24. Specifically, in this embodiment, the control board 23, as the core of the electronic control system, is responsible for receiving and processing signals from the Hall element to achieve precise control of the water pump's operation. The stator winding 24 is responsible for generating a rotating magnetic field, which interacts with the magnets in the impeller, thereby driving the impeller to rotate. The Hall element senses changes in the magnetic field of the stator winding 24 and transmits the sensed signal to the control board 23, so that the control board 23 can adjust the current of the stator winding 24 according to the signal, thereby controlling the impeller's speed and power. This design not only improves the control accuracy and response speed of the automotive electronic water pump but also enables the water pump to intelligently adjust according to actual needs, achieving energy-saving and efficient operation. At the same time, the reliable operation of the stator assembly also ensures the stability and durability of the water pump during long-term use.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel automotive electronic water pump with detachable impeller, comprising a pump body and a pump cover, the pump cover is arranged on the pump body, the pump body and the pump cover form a pump cavity, an outer rotor mounting portion is arranged on the inner wall of the pump cavity, the outer rotor mounting portion separates the pump cavity into an upper cavity portion and a lower cavity portion, characterized in that: A detachable impeller is provided inside the upper cavity. The detachable impeller is fixed on the outer rotor mounting part. The detachable impeller includes an impeller body and an impeller shell, and the impeller body and the impeller shell are connected by a snap-fit.

2. The novel automotive electronic water pump with a detachable impeller according to claim 1, characterized in that: The impeller body has a blade section and a housing mounting section. A mounting groove is formed on the impeller housing. The housing mounting section of the impeller body extends into the mounting groove and connects with the impeller housing. A snap-fit ​​structure protrudes from the housing mounting section. A snap-fit ​​through hole is formed in the groove wall of the mounting groove. The snap-fit ​​structure extends into the snap-fit ​​through hole and snaps with the impeller housing.

3. The novel automotive electronic water pump with a detachable impeller according to claim 2, characterized in that: The housing mounting part is arranged in a ring structure on the end face of the blade part near the impeller housing. The snap-fit ​​structure protrudes on the end face of the housing mounting part away from the blade part. The snap-fit ​​structure protrudes in a direction away from the central axis of the housing mounting part to form a snap-fit ​​end. The lower part of the snap-fit ​​end near the snap-fit ​​through hole is provided with a first guide slope. The upper part of the snap-fit ​​end extends towards the outer wall of the housing mounting part to form a second guide slope.

4. The novel automotive electronic water pump with a detachable impeller according to claim 2, characterized in that: The inner wall of the outer casing mounting part protrudes to form several equally spaced magnetic steel limiting parts, and magnetic steel limiting grooves are formed between adjacent magnetic steel limiting parts. One side of the buckle structure extends to the bottom of the magnetic steel limiting part and connects with the magnetic steel limiting part.

5. The novel automotive electronic water pump with a detachable impeller according to claim 2, characterized in that: The bottom of the impeller housing is bent toward the center of the impeller housing to form a magnet support.

6. The novel automotive electronic water pump with a detachable impeller according to claim 2, characterized in that: The buckle through hole is square-shaped, and the upper part of the inner wall on both sides of the buckle through hole is provided with a rounded corner structure.

7. The novel automotive electronic water pump with a detachable impeller according to claim 1, characterized in that: The lower cavity is provided with a stator assembly, which includes a control board, a stator winding, and a Hall element. The control board is connected to the Hall element and senses the signal of the stator winding through the Hall element.

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