Electronic shielding water pump with self-locking flow channel fastening structure

Abstract

The utility model relates to an electronic shielding water pump with a self-locking flow channel fastening structure, which comprises a motor shell, a water pump volute, a rotor assembly and a stator assembly, a motor shaft is arranged on the rotor assembly, and an impeller is arranged on the motor shaft; a self-locking nut is arranged at the upper end part of the motor shaft, so that the impeller and the motor shaft are fixed, a clockwise flow channel is arranged between a water inlet and a water outlet of the water pump volute, the self-locking nut is provided with an anticlockwise internal thread, and the upper end part of the motor shaft is provided with an anticlockwise external thread; a hollow inner cavity is formed in the middle of the self-locking nut, so that a backflow water path generated in the motor shaft flows to the water outlet after passing through the inner cavity. During use, the self-locking nut is adopted to fasten the impeller, the problem that the impeller is not firmly connected is solved, the self-locking nut plays a drainage role in a backflow water path generated in the motor shaft, the phenomenon of water path convection is avoided, water power is optimized, meanwhile, the assembly structure is more compact, and the overall efficiency of the water pump is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive electronically shielded water pumps, specifically an electronically shielded water pump with a self-locking flow channel fastening structure. Background Technology

[0002] In the existing technology, the design of high-power miniaturized automotive electronically shielded water pumps uses a large axial force to lock the impeller. The mainstream design method for automotive shielded water pumps is to install a retaining ring on the motor shaft to lock the impeller. The retaining ring is a standard part that is easy to obtain and easy to install.

[0003] However, in actual use, as the impeller rotates, the retaining ring may fall off or even break due to fatigue. In addition, during the start-up and shutdown process, the water pump inlet is in direct contact with the water return path of the motor shaft, which will generate convection at the impeller position, reducing the service life of the impeller and retaining ring.

[0004] Therefore, there is an urgent need in the market for a new type of self-locking flow channel fastening structure for electronically shielded water pumps. Summary of the Invention

[0005] The purpose of this utility model is to provide an improved electronically shielded water pump with a self-locking flow channel fastening structure. Through structural improvement, the impeller is fastened by connecting the self-locking nut to the motor shaft. At the same time, it ensures that the water flowing back in the motor shaft flows directly to the outlet through the inner cavity of the self-locking nut, reducing convection, optimizing hydraulics, and improving the overall efficiency of the water pump.

[0006] To achieve the above objectives, the technical solution of this utility model is: an electronically shielded water pump with a self-locking flow channel fastening structure, comprising a motor housing, a water pump volute, and a rotor assembly and a stator assembly disposed between the motor housing and the water pump volute, characterized in that: a motor shaft is provided on the rotor assembly, an impeller is sleeved on the upper end of the motor shaft, and an end cover is provided between the rotor assembly and the impeller; a self-locking nut is provided at the upper end of the motor shaft to fix the impeller to the motor shaft; an inlet and an outlet are provided on the water pump volute, a clockwise flow channel is provided between the inlet and the outlet, the self-locking nut has a counterclockwise internal thread, and the upper end of the motor shaft has a counterclockwise external thread to cooperate with the self-locking nut; a hollow inner cavity is provided in the middle of the self-locking nut, so that the backflow water generated in the motor shaft flows to the outlet after passing through the inner cavity.

[0007] Preferably, the self-locking nut has a cylindrical inner cavity, a return water inlet communicating with the inner cavity at the bottom, and a return water outlet communicating with the inner cavity at the middle.

[0008] Furthermore, the self-locking nut has 2-3 return water outlets in the middle, and arc-shaped guide vanes are provided between adjacent water outlets. The return water outlets are arranged along the side wall of the inner cavity.

[0009] Furthermore, the top of the self-locking nut is provided with an arc-shaped raised cap.

[0010] Furthermore, a water-proof sleeve is provided between the rotor assembly and the stator assembly; a sealing ring is provided around the end cover, and an insulating pad is provided at the bottom of the end cover.

[0011] Furthermore, the motor housing contains high-voltage and low-voltage connectors, and the bottom of the motor housing has a cover plate with an electronic control board on it.

[0012] Compared with the prior art, the technical solution of this utility model not only improves the overall technical solution, but also includes many detailed improvements. Specifically, it has the following beneficial effects:

[0013] 1. The improved solution described in this utility model has a hollow inner cavity in the middle of the self-locking nut, so that the backflow water generated in the motor shaft flows to the outlet after passing through the inner cavity, so that the backflow water in the motor shaft does not directly contact the water inlet water of the water pump, reducing convection, optimizing hydraulics, and further improving the efficiency of the water pump.

[0014] 2. In the technical solution of this utility model, the upper end of the motor shaft is provided with a self-locking nut that cooperates with it. The impeller is fixed to the motor shaft by the self-locking nut. The water pump volute is provided with an inlet and an outlet. A clockwise flow channel is provided between the inlet and the outlet. The self-locking nut is provided with a counterclockwise internal thread. The upper end of the motor shaft is provided with a counterclockwise external thread that cooperates with the self-locking nut. The above connection method ensures the stability of the impeller during use, reduces the shaking of the impeller during use, reduces the friction between the impeller and the water pump volute, extends the service life of the water pump, and effectively reduces the cost of use.

[0015] 3. This utility model proposes a locking method by cooperating a self-locking nut with the motor shaft, which solves the problem of unstable snap ring connection in the prior art, making the overall structure of the water pump more compact and reasonable;

[0016] 4. This utility model has a simple structure, reasonable layout, and is easy to disassemble, assemble, and maintain, making it convenient for promotion and use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the dispersed structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model in use.

[0019] Figure 3 for Figure 2 Sectional view along the AA direction.

[0020] Figure 4 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Figure 5 for Figure 4 Sectional view along the BB direction.

[0022] Figure 6 This is a schematic diagram of the structure of the self-locking nut of this utility model.

[0023] Figure 7 for Figure 6 Sectional view along the AA direction.

[0024] Figure 8 This is another structural schematic diagram of the self-locking nut of this utility model.

[0025] Figure 9 for Figure 8 Sectional view along the BB direction.

[0026] Figure label:

[0027] 1. Pump volute, 2. Self-locking nut, 3. Bolt, 4. Impeller, 5. End cover, 6. Sealing ring, 7. Insulating gasket, 8. Rotor assembly, 9. Waterproof sleeve, 10. Stator assembly;

[0028] 11 High-voltage connector, 12 Low-voltage connector, 13 Motor housing, 14 Electronic control board, 15 Cover plate, 16 Inlet, 17 Outlet;

[0029] 21 Internal thread, 22 Inner cavity, 23 Cap top, 24 Return water outlet, 25 Guide vane, 26 Return water inlet. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] This utility model provides an electronically shielded water pump with a self-locking flow channel fastening structure, including a motor housing 13, a water pump volute 1, and a rotor assembly 8 and a stator assembly 10 disposed between the motor housing and the water pump volute. See details below. Figure 1The difference between this and the existing technology is as follows: a motor shaft is provided on the rotor assembly 8, and an impeller 4 is sleeved on the upper end of the motor shaft. An end cover 5 is provided between the rotor assembly and the impeller. A self-locking nut 2 is provided at the upper end of the motor shaft to fix the impeller to the motor shaft. The pump volute is provided with an inlet 16 and an outlet 17. A clockwise flow channel is provided between the inlet and the outlet. The self-locking nut is provided with a counterclockwise internal thread 21. The upper end of the motor shaft is provided with a counterclockwise external thread that mates with the self-locking nut. A hollow inner cavity 22 is provided in the middle of the self-locking nut so that the backflow water generated in the motor shaft flows to the outlet after passing through the inner cavity.

[0032] In use, this utility model eliminates the snap ring structure on the motor shaft in the prior art, and instead designs a self-locking nut to fasten the impeller. This new connection method not only solves the problem of the impeller not being firmly connected, but also guides the backflow water in the motor shaft through the self-locking nut, avoiding the phenomenon of water convection, optimizing the hydraulics. At the same time, the assembly structure is more compact, improving the overall efficiency of the water pump.

[0033] Example 1

[0034] In this embodiment, a motor shaft is provided inside the motor housing 13, and an impeller 4 is fitted on the upper end of the motor shaft. An end cover 5 is provided between the rotor assembly and the impeller. In order to further secure the impeller, a self-locking nut 2 that cooperates with the motor shaft is provided at the upper end of the motor shaft. The self-locking nut makes the impeller and the motor shaft fixedly connected, ensuring that the impeller will not shake during use and reducing the frictional wind direction between the impeller and the water pump volute.

[0035] Furthermore, the pump casing has an inlet 16 at the top and an outlet 17 on the side. A clockwise flow channel is provided between the inlet and outlet. The self-locking nut has a counter-clockwise internal thread 21, and the upper end of the motor shaft has a counter-clockwise external thread that mates with the self-locking nut. During installation, a torque wrench can be used to tighten the thread. Once the impeller rotates, the rotation direction is opposite to the thread direction, further securing the connection between the impeller and the motor shaft. Simultaneously, the self-locking nut has a hollow inner cavity 22. Through the drainage effect of the inner cavity, the backflow water generated in the motor shaft flows through the inner cavity to the outlet.

[0036] Specifically, the self-locking nut has a cylindrical inner cavity 22. The bottom of the nut has a return water inlet 26 communicating with the inner cavity, and the middle has a return water outlet communicating with the inner cavity. The top of the nut has an arc-shaped protruding cap 23, which further reduces water flow resistance, minimizes water flow backflow and countercurrent, optimizes hydraulics, and effectively improves the overall efficiency of the pump. Therefore, this invention has the advantages of high reliability, high efficiency, easy maintenance, and long service life, and is suitable for various demanding applications.

[0037] Example 2

[0038] This embodiment includes a motor housing 13, a water pump volute 1, and a rotor assembly 8 and a stator assembly 10 disposed within the motor housing and the water pump volute. The rotor assembly has a motor shaft, and an impeller 4 is fitted onto the upper end of the motor shaft. An end cover 5 is provided between the rotor assembly and the impeller. A self-locking nut 2 is provided at the upper end of the motor shaft to fix the impeller to the motor shaft. The water pump volute has an inlet 16 and an outlet 17, with a clockwise flow channel between the inlet and outlet. The self-locking nut has a counterclockwise internal thread 21, and the upper end of the motor shaft has a counterclockwise external thread that mates with the self-locking nut. During installation, a torque wrench can be used to tighten the screws. When the impeller rotates, the direction of rotation is opposite to the direction of the thread, further securing the connection between the impeller and the motor shaft and ensuring the stability of the impeller during use.

[0039] Also see Figure 4 , Figure 5 The self-locking nut has a hollow inner cavity 22 in the middle. Through the flow-guiding effect of this inner cavity, the backflow water generated in the motor shaft flows to the outlet after passing through the inner cavity, which reduces the contact between the backflow water generated in the motor shaft and the water inlet, greatly reduces the occurrence of convection, and plays a significant role in optimizing hydraulics.

[0040] Further, see Figure 6 , Figure 7 The self-locking nut has 2-3 return water outlets 24 in the middle, and arc-shaped guide vanes 25 are provided between adjacent water outlets. Through the guide vanes, the water coming out of the return water path can flow quickly and directly to the outlet, avoiding water convection and improving the overall efficiency of the water pump. The return water outlets can be arranged along the side wall of the inner cavity, and the 2-3 water outlets can occupy 2 / 3-3 / 4 of the circumference of the inner cavity, so the diversion effect is very good.

[0041] Furthermore, stainless steel inserts can be installed at the threaded connection of the self-locking nut to further enhance the locking force and ensure that it will not loosen over a long period of use.

[0042] Furthermore, a water-proof sleeve 9 is provided between the rotor assembly and the stator assembly; a sealing ring 6 is provided around the end cover, and an insulating pad 7 is provided at the bottom of the end cover. A high-voltage connector 11 and a low-voltage connector 12 are provided inside the motor housing. A cover plate 15 is provided at the bottom of the motor housing, and a PCBA electronic control board 14 is provided on the cover plate. This electronic control board is existing technology, and its specific working principle and effects will not be described in detail here. This utility model adopts a modular design, which facilitates installation and maintenance. The structure of each component is preferably made of corrosion-resistant and high-strength materials, further improving the overall service life.

[0043] In general, the advantages of this utility model are as follows:

[0044] 1. By setting a special structure with a self-locking nut, the occurrence of convection in the water pump structure is reduced, unnecessary water flow resistance is reduced, the hydraulic mode is optimized, and the efficiency of the water pump as a whole is improved.

[0045] 2. A self-locking nut structure is adopted to fix the impeller and the motor shaft, which abandons the existing snap ring structure and solves the problem of snap rings being easy to loosen and not secure. At the same time, it makes the connection method of the whole machine more compact and reasonable.

[0046] 3. It improves the connection between the impeller and the motor shaft, reduces impeller wobbling during use, lowers the risk of friction between the impeller and the volute, and extends the service life of the whole machine;

[0047] 4. The overall structure is reasonably laid out, and disassembly and maintenance are convenient, reducing the cost of use and maintenance.

[0048] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An electronically shielded water pump with a self-locking flow channel fastening structure, comprising a motor housing, a water pump volute, and a rotor assembly and a stator assembly disposed between the motor housing and the water pump volute, characterized in that: The rotor assembly is equipped with a motor shaft, and an impeller is fitted onto the upper end of the motor shaft. An end cover is provided between the rotor assembly and the impeller. A self-locking nut is provided at the upper end of the motor shaft to fix the impeller to the motor shaft. The pump casing is equipped with an inlet and an outlet. A clockwise flow channel is provided between the inlet and the outlet. The self-locking nut is provided with a counterclockwise internal thread. The upper end of the motor shaft is provided with a counterclockwise external thread to cooperate with the self-locking nut. A hollow inner cavity is provided in the middle of the self-locking nut so that the backflow water generated in the motor shaft flows to the outlet after passing through the inner cavity.

2. The electronic shielded water pump having a self-locking runner fastening structure according to claim 1, characterized in that: The self-locking nut has a cylindrical inner cavity. The bottom of the self-locking nut has a return water inlet that communicates with the inner cavity, and the middle of the self-locking nut has a return water outlet that communicates with the inner cavity.

3. An electronic shielded water pump having a self-locking runner fastening structure according to claim 2, characterized in that: The self-locking nut has 2-3 return water outlets in the middle, and there are arc-shaped guide vanes between adjacent water outlets. The return water outlets are arranged along the side wall of the inner cavity.

4. The electronic shielded water pump having a self-locking runner fastening structure according to claim 2, characterized in that: The self-locking nut has a rounded, raised cap at the top.

5. The electronic shielded water pump having a self-locking runner fastening structure according to claim 1, characterized in that: A water-proof sleeve is provided between the rotor assembly and the stator assembly; a sealing ring is provided around the end cover, and an insulating pad is provided at the bottom of the end cover.

6. The electronically shielded water pump having a self-locking runner fastening structure according to claim 1, characterized in that: The motor housing contains high-voltage and low-voltage connectors, and the bottom of the motor housing has a cover plate with an electronic control board on it.

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