Noise reduction type electronic water pump

Abstract

The invention relates to the technical field of electronic water pumps, in particular to a noise reduction type electronic water pump which comprises a water pump shell, a motor assembly, an impeller rotor assembly, a controller assembly and a rear end cover. An isolation sleeve with a sound insulation effect is arranged between a rotor on the impeller rotor assembly and the motor assembly, and a noise reduction support is arranged outside the motor assembly. On one hand, the interior of the isolation sleeve between the stator and the rotor of the motor is designed to be of a cavity-shaped structure, and the cavity is filled with the sound insulation pad capable of insulating sound and reducing noise, and on the other hand, the exterior of the motor shell is wrapped with the sound absorption coil and the noise reduction support with the elastic connecting assembly. Noise generated by the automobile electronic water pump is further reduced, the noise is eliminated to the maximum extent, the working environment of the electronic water pump is guaranteed, vibration generated by the noise is prevented from being transmitted to a connecting structure corresponding to the electronic water pump, and the connecting stability between the two sets of the electronic water pump is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic water pumps, and particularly to a noise-reducing electronic water pump. Background Art

[0002] Existing automotive electronic water pumps generally include a housing, a volute component, a stator-rotor assembly, an impeller assembly, a control circuit board, and an end cover. The stator-rotor assembly is connected to the impeller. The upper and lower ends of the housing are respectively sealed with the volute component and the end cover. The control circuit board is placed in the space sealed by the end cover, and the stator-rotor assembly and the impeller assembly are placed in the space sealed by the volute component. A control circuit is provided in the control circuit board, and the motor speed is adjusted according to the temperature to be controlled through the control circuit in the control circuit board, and the water pump flow is controlled, so as to achieve the purpose of accurately controlling the temperature.

[0003] During the operation of the electronic water pump, affected by the cogging torque, the stator-rotor assembly will generate relatively large noise, and at the same time, it will also cause the housing to vibrate, thereby affecting the working environment of the electronic water pump and the connection stability between the electronic water pump and its corresponding connection structure. Currently, a sound-absorbing pad is installed in the installation slot of the outer shell of the electronic water pump, a bushing is inserted into the sound-absorbing pad, and then fixed and connected by screws. However, after actual use, it is found that the noise reduction effect is not good and the noise generated by the electronic water pump cannot be fundamentally reduced. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a noise-reducing electronic water pump.

[0005] The technical problems to be solved by the present invention are realized by the following technical solutions:

[0006] A noise-reducing electronic water pump includes a water pump housing, a motor assembly, an impeller-rotor assembly, a controller assembly, and a rear end cover. The motor assembly is screwed to the water pump housing and the rear end cover respectively. The impeller-rotor assembly is coaxially installed inside the motor assembly, and the impeller thereon is located inside the water pump housing. The controller assembly is located inside the rear end cover and installed on the bottom of the motor assembly.

[0007] A sound-insulating isolation sleeve is provided between the rotor on the impeller-rotor assembly and the motor assembly, and a noise-reducing bracket is provided outside the motor assembly.

[0008] As a further improvement of the present invention, the motor assembly includes a motor housing and a motor stator disposed inside the motor housing. A stepped groove for cooperating with the isolation sleeve is provided inside the motor housing.

[0009] As a further improvement of the present invention, a waterproof rubber ring is provided between the isolation sleeve and the groove wall of the stepped groove.

[0010] As a further improvement of the present invention, the interior of the isolation sleeve has a cavity-like structure.

[0011] As a further improvement of the present invention, the cavity of the isolation sleeve is filled with a sound insulation pad, and the sound insulation pad has a honeycomb-like structure.

[0012] As a further improvement of the present invention, a sound absorption ring is further provided between the noise reduction bracket and the outside of the motor housing, and the sound absorption ring is wrapped around the outside of the motor housing.

[0013] As a further improvement of the present invention, the noise reduction bracket has an annular structure and is located outside the sound absorption ring, and a buffer connection component is connected between the noise reduction bracket and the sound absorption ring.

[0014] As a further improvement of the present invention, the buffer connection component includes a plurality of connection cylinders circumferentially and equidistantly arranged on the outer side wall of the sound absorption ring, and a plurality of elastic connecting rods slidably sleeved in the plurality of connection cylinders respectively, and the other ends of the plurality of elastic connecting rods are correspondingly connected to the inner wall of the noise reduction bracket.

[0015] As a further improvement of the present invention, buffer springs are arranged at the inner bottom of each of the plurality of connection cylinders, and the ends of the plurality of elastic connecting rods located inside the connection cylinders are in abutting connection with the buffer springs.

[0016] As a further improvement of the present invention, a connection bracket is fixedly connected to one side wall of the noise reduction bracket.

[0017] The beneficial effects of the present invention are as follows:

[0018] The present invention provides a noise reduction type electronic water pump. On the one hand, by designing the interior of the isolation sleeve between the motor stator and the rotor into a cavity-like structure and filling the cavity with a sound insulation pad capable of sound insulation and noise reduction, and on the other hand, by wrapping a sound absorption ring and a noise reduction bracket with an elastic connection component outside the motor housing, the noise generated by the automotive electronic water pump is further silenced, achieving the maximum elimination of noise, ensuring the working environment of the electronic water pump, and also avoiding the vibration generated by the noise from being transmitted to the corresponding connection structure of the electronic water pump, ensuring the connection stability between the two groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments:

[0020] Figure 1 is a schematic diagram of the overall sectional structure of the present invention;

[0021] Figure 2 is a schematic diagram of the sectional structure of the isolation sleeve (including the sound insulation pad) in the present invention;

[0022] Figure 3 Schematic cross-sectional structure diagram of the isolation sleeve (without sound insulation pad) in the present invention;

[0023] Figure 4 Schematic connection structure diagram of the noise reduction bracket and the sound absorption ring in the present invention;

[0024] Figure 5 Schematic cross-sectional view of the connection between the noise reduction bracket and the sound absorption ring in the present invention.

[0025] In the figure: 1. Water pump housing; 2. Motor assembly; 21. Motor housing; 211. Step groove; 22. Motor stator; 3. Impeller rotor assembly; 4. Controller assembly; 5. Rear end cover; 6. Isolation sleeve; 7. Waterproof rubber ring; 8. Sound insulation pad; 9. Noise reduction bracket; 10. Sound absorption ring; 11. Connecting cylinder; 12. Elastic connecting rod; 13. Buffer spring; 14. Connecting bracket. Specific embodiments

[0026] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] As Figures 1 to 5 shown, a noise reduction type electronic water pump includes a water pump housing 1, a motor assembly 2, an impeller rotor assembly 3, a controller assembly 4, a rear end cover 5, an isolation sleeve 6, a noise reduction bracket 9, and a sound absorption ring 10. Specifically, the motor assembly 2 includes a motor housing 21 and a motor stator 22 disposed inside the motor housing 21. The upper part of the water pump housing 1 is connected to the motor housing 21 by screws. The rear end cover 5 is connected to the bottom of the motor housing 21 by screws and a sealing ring. The controller assembly 4 is located inside the rear end cover 5 and is mounted on the bottom of the motor assembly 2. The pins on the motor stator 22 are inserted into the controller assembly 4 and welded and fixed. The impeller rotor assembly 3 is coaxially installed inside the motor housing 21, and the impeller thereon is located inside the water pump housing 1. The isolation sleeve 6 is installed between the inner wall of the motor housing 21 and the rotor on the impeller rotor assembly 3. The sound absorption ring 10 is wrapped around the outer wall of the motor housing 21 and can absorb the noise generated inside the automotive electronic water pump. The noise reduction bracket 9 is connected to the sound absorption ring 10 and is used to connect the automotive electronic water pump to the connection structure.

[0028] Furthermore, a step groove 211 that cooperates with the isolation sleeve 6 is provided inside the motor housing 21. The step groove 211 serves to position the isolation sleeve 6 in place. A waterproof rubber ring 7 is provided between the isolation sleeve 6 and the wall of the step groove 211 to prevent liquid from seeping into the inside of the motor housing 21.

[0029] As a further improvement of this embodiment, the interior of the isolation sleeve 6 has a cavity structure, and the cavity of the isolation sleeve 6 is filled with a sound insulation pad 8. The sound insulation pad 8 has a honeycomb structure. The sound insulation pad 8 can absorb most of the noise generated by the automotive electric water pump, greatly reducing the noise. In cooperation with the sound absorption ring 10 located outside the motor housing 21, the noise is eliminated to the greatest extent, ensuring the working environment of the electric water pump.

[0030] As a further improvement of this embodiment, the noise reduction bracket 9 has an annular structure and is located outside the sound absorption ring 10. A buffer connection component is connected between the noise reduction bracket 9 and the sound absorption ring 10. The buffer connection component includes a plurality of connection cylinders 11 circumferentially and equidistantly arranged on the outer side wall of the sound absorption ring 10, and a plurality of elastic connecting rods 12 slidably sleeved in the plurality of connection cylinders 11 respectively. The other ends of the plurality of elastic connecting rods 12 are correspondingly connected to the inner wall of the noise reduction bracket 9. In this embodiment, both the connection cylinders 11 and the elastic connecting rods 12 are provided with four. Buffer springs 13 are provided at the inner bottoms of the four connection cylinders 11. The ends of the four elastic connecting rods 12 located inside the connection cylinders 11 are in abutting connection with the buffer springs 13. Through the above buffer connection component, the vibration caused by the noise of the automotive electric water pump can be buffered and absorbed, ensuring the connection stability between the automotive electric water pump and its corresponding connection structure.

[0031] As a further improvement of this embodiment, a connection bracket 14 is fixedly connected to one side side wall of the noise reduction bracket 9. Specifically, in this embodiment, a threaded hole is provided on the noise reduction bracket 9, and the connection bracket 14 is fixedly connected to the noise reduction bracket 9 through bolts.

[0032] The working principle and usage process of the present invention:

[0033] During use, the sound absorption ring 10 is wrapped around the outside of the automotive electric water pump and is connected to the corresponding connection structure through the connection bracket 14. During the operation of the automotive electric water pump, most of the noise generated will be absorbed by the sound insulation pad in the isolation sleeve 6 first. Then, the remaining noise is eliminated by the sound absorption ring 10 located outside the automotive electric water pump. In addition, the vibration generated by the noise is buffered and abutted and eliminated through the elastic connecting rods 12 and the buffer springs 13, preventing the vibration from being transmitted to the noise reduction bracket 9 and then to the connection bracket 14 through the noise reduction bracket 9.

[0034] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A noise reduction type electronic water pump, comprising a water pump housing (1), a motor assembly (2), an impeller rotor assembly (3), a controller assembly (4), and a rear end cover (5), wherein the motor assembly (2) is screwed to the water pump housing (1) and the rear end cover (5), respectively, the impeller rotor assembly (3) is coaxially mounted inside the motor assembly (2), the impeller thereon is located inside the water pump housing (1), and the controller assembly (4) is located inside the rear end cover (5) and mounted on the bottom of the motor assembly (2); Features: An insulating sleeve (6) having a sound insulation effect is arranged between the rotor on the impeller rotor assembly (3) and the motor assembly (2), and a noise reduction bracket (9) is arranged outside the motor assembly (2).

2. A noise reduction electronic water pump according to claim 1, characterized in that: The motor assembly (2) comprises a motor housing (21) and a motor stator (22) built into the motor housing (21); a step groove (211) matching the insulating sleeve (6) is provided inside the motor housing (21).

3. A noise reduction electronic water pump according to claim 2, characterized in that: A waterproof rubber ring (7) is provided between the isolation sleeve (6) and the groove wall of the step groove (211).

4. A noise reduction electronic water pump according to claim 1, characterized in that: The interior of the insulating sleeve (6) is a hollow structure.

5. A noise reduction electronic water pump according to claim 4, characterized in that: The cavity is filled with a sound insulation pad (8), and the sound insulation pad (8) has a honeycomb structure.

6. A noise reduction electronic water pump according to claim 2, characterized in that: A sound absorbing ring (10) is also provided between the noise reduction bracket (9) and the outside of the motor housing (21), and the sound absorbing ring (10) is wrapped around the outside of the motor housing (21).

7. A noise reduction electronic water pump according to claim 6, characterized in that: The noise reduction bracket (9) is in an annular structure and is located outside the sound absorbing coil (10); a buffer connection component is connected between the noise reduction bracket (9) and the sound absorbing coil (10).

8. A noise reduction electronic water pump according to claim 7, characterized in that: The buffer connection assembly comprises a plurality of connection tubes (11) equidistantly arranged on the outer wall of the sound absorbing coil (10) in the circumferential direction, and a plurality of elastic connection rods (12) correspondingly slidably sleeved in the plurality of connection tubes (11), and the other ends of the plurality of elastic connection rods (12) are correspondingly connected to the inner wall of the noise reduction bracket (9).

9. A noise reduction electronic water pump according to claim 8, characterized in that: The inner bottoms of the plurality of connection cylinders (11) are each provided with a buffer spring (13), and the ends of the plurality of elastic connection rods (12) located inside the connection cylinder (11) are abutted and connected with the buffer spring (13).

10. The noise reduction electronic water pump according to claim 1, characterized in that: A connecting bracket (14) is fixedly connected to a side wall of one side of the noise reduction bracket (9).

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