Automobile electronic water pump

Abstract

The invention relates to the technical field of electronic water pumps, in particular to an automobile electronic water pump which comprises a volute, one end of the volute is detachably connected with a pump cover, the other end of the volute is fixedly connected with a rear cover through an ultrasonic welding technology, a stator assembly is arranged in the volute in an integrated injection molding mode, and an impeller is arranged in the pump cover. A shielding sleeve is arranged at one end of the impeller in an integrated injection molding mode, a rotor assembly is arranged on the shielding sleeve in a sleeving mode, a circuit board is arranged in the rear cover, a plurality of first contact pins are arranged at the bottom of the stator assembly, a power socket is arranged on the outer wall of the end, close to the rear cover, of the volute in an integrated injection molding mode, and a plurality of second contact pins are arranged in the power socket. The water pump has higher reliability, the total weight of the water pump is reduced, the effective non-magnetic gap between the rotor and the stator is reduced, the power loss in the power transmission process is reduced, the working efficiency of the water pump is greatly improved, the waterproof performance is greatly improved, the overall structure is more stable, and the anti-vibration performance is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic water pumps, and in particular to an automobile electronic water pump. Background Art

[0002] An automotive electronic water pump is an electronically controlled water pump used for circulation in the automotive cooling system. It is usually driven by an electric motor and removes the heat generated by the engine by circulating coolant to maintain the normal operating temperature of the engine.

[0003] The existing water pump stator assembly is sealed and connected by bolts and sealing rings to achieve the waterproof effect. However, there are multiple sealing rings in this method, which may cause serious water leakage after aging of the sealing rings. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an automotive electronic water pump to solve the problem that the traditional sealing method of bolts plus sealing rings is prone to serious water leakage after the sealing rings age.

[0005] Based on the above purpose, the present invention provides an automotive electronic water pump, including a volute, one end of the volute is detachably connected to a pump cover, and the other end is fixedly connected to a rear cover using ultrasonic welding technology, the interior of the volute is provided with a stator assembly by integrated injection molding, the interior of the pump cover is provided with an impeller, one end of the impeller is integrally injection molded with a shielding sleeve, a rotor assembly is sleeved on the shielding sleeve, the rotor assembly is fixedly connected to the shielding sleeve, the rotor assembly is arranged inside the stator assembly, a circuit board is provided inside the rear cover, the circuit board is clamped at the bottom of the volute, a plurality of first pins are provided at the bottom of the stator assembly, each of the first pins passes through the bottom of the volute and is inserted into the circuit board, a power socket is integrally injection molded on the outer wall of the volute near one end of the rear cover, a plurality of second pins are provided in the power socket, one end of each of the second pins passes through the volute and is inserted into the circuit board.

[0006] Preferably, a water inlet is provided on the top of the pump cover, and a water outlet is provided on the side of the pump cover.

[0007] Preferably, a sealing ring is provided between the pump cover and the volute.

[0008] Preferably, the stator assembly comprises:

[0009] A mounting tube is arranged inside the volute, an annular flange is extended outward from the open end of the mounting tube, the annular flange is integrally formed by injection molding with the top of the volute, and the bottom of the mounting tube is integrally formed by injection molding with the inside of the volute;

[0010] A cavity is arranged between the mounting cylinder and the volute;

[0011] A stator assembly is disposed in the cavity;

[0012] One end of the shaft rod is fixedly arranged on the inner bottom of the installation tube, and the shielding sleeve is sleeved on the shaft rod.

[0013] Preferably, a sleeve is provided at the internal rotation connection of the shielding sleeve, and the sleeve is sleeved on the shaft rod. Washers are provided at both ends of the sleeve, and each of the washers is sleeved on the shaft rod. A limit seat is provided inside the pump cover, and the limit seat is sleeved on the shaft rod, and the limit seat is fixedly connected to the shaft rod.

[0014] Preferably, a plurality of support plates are fixedly provided on the outer wall of the volute near the bottom, and a hook is provided on the side of each support plate, one end of each hook is fixedly connected to the bottom of the cavity, and the other end passes through the circuit board and clamps the circuit on the support plate.

[0015] Preferably, a plurality of heat dissipation openings are provided at the bottom of the cavity.

[0016] Preferably, the inner bottom of the rear cover is provided with a heat conducting structure.

[0017] Beneficial effects of the present invention:

[0018] 1. The volute and rear cover are sealed by ultrasonic welding technology, which replaces the traditional sealing method of bolts and sealing rings, has higher reliability and reduces the total weight of the water pump;

[0019] 2. Add a separate shielding sleeve and integrally inject it with the impeller to reduce the effective non-magnetic gap between the rotor and the stator, reduce the power loss in the power transmission process, and greatly improve the working efficiency of the water pump;

[0020] 3. The volute and stator components are integrally injection molded, which greatly improves the waterproof performance, makes the overall structure more stable, and enhances the anti-vibration performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2It is a schematic cross-sectional structural diagram of an electronic water pump according to an embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the exploded structure of the impeller and rotor assembly of an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the bottom of the volute according to an embodiment of the present invention.

[0026] The markings in the figure are:

[0027] 1. Volute; 2. Pump cover; 3. Back cover; 4. Impeller; 5. Shielding sleeve; 6. Rotor assembly; 7. Circuit board; 8. First pin; 9. Power socket; 10. Second pin; 11. Water inlet; 12. Water outlet; 13. Sealing ring; 14. Mounting cylinder; 15. Annular flange; 16. Cavity; 17. Stator assembly; 18. Shaft; 19. Sleeve; 20. Washer; 21. Limit seat; 22. Support plate; 23. Hook; 24. Heat dissipation port; 25. Thermal conductive structure. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figures 1 to 4As shown, an automotive electronic water pump comprises a volute 1, one end of the volute 1 is detachably connected with a pump cover 2, and the other end is fixedly connected with a rear cover 3 by ultrasonic welding technology, the interior of the volute 1 is provided with a stator assembly by integrated injection molding, the interior of the pump cover 2 is provided with an impeller 4, one end of the impeller 4 is integrally injection molded with a shielding sleeve 5, a rotor assembly 6 is sleeved on the shielding sleeve 5, the rotor assembly 6 is fixedly connected to the shielding sleeve 5, the rotor assembly 6 is arranged inside the stator assembly, a circuit board 7 is provided inside the rear cover 3, the circuit board 7 is clamped at the bottom of the volute 1, a plurality of first pins 8 are provided at the bottom of the stator assembly, each of the first pins 8 passes through the bottom of the volute 1 and is inserted on the circuit board 7, a power socket 9 is integrally injection molded on the outer wall of the volute 1 near one end of the rear cover 3, a plurality of second pins 10 are provided in the power socket 9, one end of each of the second pins 10 passes through the volute 1 and is inserted on the circuit board 7.

[0031] As an optional embodiment, a water inlet 11 is provided on the top of the pump cover 2 , and a water outlet 12 is provided on the side of the pump cover 2 .

[0032] As an optional embodiment, a sealing ring 13 is provided between the pump cover 2 and the volute 1 .

[0033] For example, during installation, the water inlet 11 is connected to the drain outlet of the automobile engine through a hose, the water outlet 12 is connected to the automobile water tank through a hose, and the automobile control system is connected to the power socket 9. The volute 1 and the rear cover 3 are sealed by ultrasonic welding technology, replacing the traditional sealing method of bolts plus sealing rings 13, which has higher reliability and reduces the total weight of the water pump. A separate shielding sleeve 5 is added and integrally molded with the impeller 4 to reduce the effective non-magnetic gap between the rotor and the stator, reduce the power loss in the power transmission process, and greatly improve the working efficiency of the water pump. The volute 1 and the stator assembly are integrally molded, which greatly improves the waterproof performance, makes the overall structure more stable, and enhances the anti-vibration performance.

[0034] As an optional embodiment, the stator assembly includes:

[0035] The mounting tube 14 is arranged inside the volute 1, and an annular flange 15 is extended outward from the open end of the mounting tube 14. The annular flange 15 is integrally formed by injection molding with the top of the volute 1, and the bottom of the mounting tube 14 is integrally formed by injection molding with the inside of the volute 1;

[0036] The cavity 16 is arranged between the mounting tube 14 and the volute 1;

[0037] A stator assembly 17 is disposed in the cavity 16;

[0038] One end of the shaft rod 18 is fixedly mounted on the inner bottom of the mounting tube 14 , and the shielding sleeve 5 is sleeved on the shaft rod 18 .

[0039] As an optional embodiment, the internal rotating connection of the shielding sleeve 5 is provided with a sleeve 19, and the sleeve 19 is sleeved on the shaft rod 18. Washers 20 are provided at both ends of the sleeve 19, and each of the washers 20 is sleeved on the shaft rod 18. A limit seat 21 is provided inside the pump cover 2, and the limit seat 21 is sleeved on the shaft rod 18. The limit seat 21 is fixedly connected to the shaft rod 18.

[0040] As an optional embodiment, a plurality of support plates 22 are fixedly provided on the outer wall of the volute 1 near the bottom, and a hook 23 is provided on the side of each support plate 22. One end of each hook 23 is fixedly connected to the bottom of the cavity 16, and the other end passes through the circuit board 7 and clamps the circuit on the support plate 22.

[0041] As an optional embodiment, a plurality of heat dissipation openings 24 are provided at the bottom of the cavity 16 .

[0042] For example, by providing the support plate 22 and the hook 23, a certain distance is maintained between the circuit board 7 and the bottom of the cavity 16 and the bottom of the mounting tube 14, so as to prevent the heat generated between the stator and the rotor from being directly acted on the circuit board 7 when being discharged from the heat dissipation port 24, thereby causing the temperature of the circuit board 7 to increase.

[0043] As an optional embodiment, a heat-conducting structure 25 is provided on the inner bottom of the back cover 3 .

[0044] For example, a heat-conducting structure 25 is provided on the inner bottom of the rear cover 3 to improve the heat dissipation effect of the circuit board 7 .

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automotive electronic water pump, comprising a volute (1), one end of the volute (1) being detachably connected to a pump cover (2), and the other end being fixedly connected to a rear cover (3) by ultrasonic welding technology, characterized in that: The interior of the volute (1) is provided with a stator assembly by integrated injection molding, the interior of the pump cover (2) is provided with an impeller (4), one end of the impeller (4) is provided with a shielding sleeve (5) by integrated injection molding, a rotor assembly (6) is sleeved on the shielding sleeve (5), the rotor assembly (6) is fixedly connected to the shielding sleeve (5), and the rotor assembly (6) is arranged inside the stator assembly, the interior of the rear cover (3) is provided with a circuit board (7), the circuit board (7) is clamped on the bottom of the volute (1), a plurality of first plug pins (8) are provided at the bottom of the stator assembly, each of the first plug pins (8) passes through the bottom of the volute (1) and is inserted on the circuit board (7), and a power socket (9) is integrally injection molded on the outer wall of the volute (1) near one end of the rear cover (3), a plurality of second plug pins (10) are provided in the power socket (9), one end of each of the second plug pins (10) passes through the volute (1) and is inserted on the circuit board (7).

2. The automotive electronic water pump according to claim 1, characterized in that: The top of the pump cover (2) is provided with a water inlet (11), and the side of the pump cover (2) is provided with a water outlet (12).

3. The automotive electronic water pump according to claim 1, characterized in that: A sealing ring (13) is provided between the pump cover (2) and the volute (1).

4. The automotive electronic water pump according to claim 1, characterized in that: The stator assembly comprises: A mounting tube (14) is arranged inside the volute (1), an annular flange (15) is provided at an open end of the mounting tube (14) extending outward, the annular flange (15) is integrally formed by injection molding with the top of the volute (1), and the bottom of the mounting tube (14) is integrally formed by injection molding with the inside of the volute (1); A cavity (16) is arranged between the mounting cylinder (14) and the volute (1); A stator assembly (17) is arranged in the cavity (16); One end of the shaft rod (18) is fixedly mounted on the inner bottom of the mounting tube (14), and the shielding sleeve (5) is sleeved on the shaft rod (18).

5. The automotive electronic water pump according to claim 4, characterized in that: The shielding sleeve (5) is internally rotatably connected with a sleeve (19), the sleeve (19) is sleeved on the shaft (18), washers (20) are provided at both ends of the sleeve (19), each of the washers (20) is sleeved on the shaft (18), and a limiting seat (21) is provided inside the pump cover (2), the limiting seat (21) is sleeved on the shaft (18), and the limiting seat (21) is fixedly connected to the shaft (18).

6. The automotive electronic water pump according to claim 4, characterized in that: A plurality of support plates (22) are fixedly arranged on the outer wall of the volute (1) near the bottom, and a hook (23) is arranged on the side of each support plate (22). One end of each hook (23) is fixedly connected to the bottom of the cavity (16), and the other end passes through the circuit board (7) and clamps the circuit on the support plate (22).

7. The automotive electronic water pump according to claim 4, characterized in that: The bottom of the cavity (16) is provided with a plurality of heat dissipation openings (24).

8. The automotive electronic water pump according to claim 1, characterized in that: The inner bottom of the rear cover (3) is provided with a heat-conducting structure (25).

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