Small-size water pump structure

Abstract

The utility model relates to the technical field of vehicle-mounted water pump supplies. A small-size water pump structure comprises a water pump shell of an inwards-concave structure, the bottom of the water pump shell is open, a motor stator is arranged in a groove of the water pump shell, a motor rotor of an annular structure is arranged on the periphery of the motor stator, a PCBA is arranged in the middle of the water pump shell, an impeller is arranged at the bottom of the water pump shell in a matched mode, and a connector is arranged at the top of the water pump shell. A driving shaft is arranged in the center of the rotor and penetrates through the PCBA and the rotor to be assembled with the impeller. The small-size water pump structure is stable in structure, capable of optimizing the size of an electronic water pump, high in internal structure integration degree, reasonable in layout, good in heat dissipation performance and stable in work of the water pump. The technical problems that in the prior art, an existing electronic water pump is single in structure, the water pump structure cannot be further optimized according to actual requirements, the product size cannot be reduced, and higher actual requirements cannot be met are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle-mounted water pump article technical field especially relates to a small volume water pump structure. BACKGROUND

[0002] In modern society, the car has become one of the public's first choice of transportation tools. The automobile industry develops rapidly, with the performance of the car to the more safe, more reliable, more stable, full automatic + intelligent and environmental protection energy saving direction development, electronic water pump is used in the car in large quantities, and can well meet the market demand.

[0003] Electronic water pump is assembled on the new energy or traditional car engine, is used in the cooling system, provides circulating power for the coolant, the traditional water pump is directly connected with the engine, provides power through the engine rotation, its rotating speed is proportional to the engine, cannot flexibly adjust the oil flow according to actual temperature and other factors, and cannot be accurately controlled, therefore is gradually eliminated.

[0004] At present, the mainstream electronic water pump adopts motor independent operation to provide power, adopts integrated controller and a plurality of high-precision sensors to cooperate to carry out accurate control, but the structure of the current electronic water pump is single, cannot further optimize the structure according to the demand, reduces the product volume, therefore has the necessary of improvement. UTILITY MODEL CONTENTS

[0005] The utility model provides a small volume water pump structure, which has stable structure, can optimize the volume of electronic water pump, has high internal structure integration, reasonable layout, good heat dissipation, stable water pump work, solves the technical problem that the structure of the current electronic water pump is single in the prior art, cannot further optimize the water pump structure according to actual demand, reduces the product volume, cannot meet higher actual demand.

[0006] The above-mentioned technical problem of this utility model is solved by the following technical solution: a small volume water pump structure, including a water pump housing with a concave structure, the bottom of the water pump housing is open, a motor stator is provided in the groove of the water pump housing, a motor rotor with an annular structure is provided around the motor stator, a PCBA is provided in the middle of the water pump housing, an impeller is provided at the bottom of the water pump housing, and a connector is provided at the top of the water pump housing; a drive shaft is provided at the center of the rotor, and the drive shaft passes through the PCBA and the rotor and is assembled with the impeller. In this invention, the stator can be integrally plastic-coated with the pump housing. The original design, with the stator on the outside, rotor on the inside, pump impeller in front, and controller at the rear, has been redesigned and optimized to a design with the motor stator in the middle, the motor rotor on the outside, and the controller inside, reducing the pump's volume by approximately 40%. The externally mounted motor rotor provides greater torque, ensuring stable pump operation even in harsh environments. During operation, the motor rotor, motor stator, and PCBA are all immersed in water. The water flow at the PCBA is slow, preventing impact and achieving water cooling, thus ensuring the pump's operational stability.

[0007] Preferably, the motor rotor has an open-top structure, with the motor rotor covering the motor stator. This invention optimizes the traditional cylindrical rotor into a ring-shaped motor rotor, with the top of the motor rotor open, covering the space between the motor stator and the water pump housing. By placing the motor rotor externally and attaching permanent magnets inside the motor rotor, the overall size of the water pump can be greatly optimized.

[0008] Preferably, the motor rotor has a mounting hole at its center, through which the drive shaft passes and mates with the impeller.

[0009] Preferably, stator leads are wound around the motor stator, soldered to the PCBA, and led out from the connector. The stator leads are made of flexible wire and extend axially to be directly soldered to the PCBA, finally leading out from the connector at the top.

[0010] Preferably, the PCBA has a ring-shaped structure. The PCBA can be fixed to the internal cavity of the motor stator by injection molding reinforcement, with the shaft fixed at the center, which can greatly optimize the size of the water pump.

[0011] Preferably, a sealing groove is provided on the mating surface at the bottom of the water pump housing, and a sealing ring is provided in the sealing groove. The water pump of this utility model ensures a seal through the sealing ring. The motor rotor, motor stator and PCBA are all immersed in water. The water flow at the PCBA is slow, which will not cause impact. It can also achieve the effect of water cooling and ensure the working stability of the water pump.

[0012] As preferred, the outer wall of the water pump housing is integrally formed with a plurality of lugs, and each lug is provided with a mounting hole. The water pump is fixed by the lugs on the outer wall and bolts during installation.

[0013] Therefore, the small-size water pump structure has the following advantages: stable structure, optimized volume of the electronic water pump, high internal structure integration, reasonable layout, good heat dissipation, stable water pump operation, and higher actual demand can be met. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a perspective view of the small-size water pump structure of the utility model.

[0015] Figure 2 is Figure 1 a bottom view structural schematic diagram.

[0016] Figure 3 is Figure 1 a front view cross-sectional structural schematic diagram.

[0017] Figure 4 is Figure 1 a perspective view of the water pump housing.

[0018] Figure 5 is Figure 4 a front view cross-sectional structural diagram.

[0019] Figure 6 is Figure 1 a perspective view of the motor rotor.

[0020] In the figure, the water pump housing 1, the lug 2, the mounting hole 3, the sealing ring 4, the motor stator 5, the motor rotor 6, the drive shaft 7, the PCBA 8, the impeller 9, the connector 10, and the stator lead-out wire 11. DETAILED DESCRIPTION

[0021] The technical solutions of the utility model will be further specifically explained below by examples in combination with the drawings.

[0022] Example:

[0023] As Figure 1 and 2 and 3 and 4 and 5 and 6, a small-size water pump structure includes a water pump housing 1 with an inner recess structure, and the outer wall of the water pump housing 1 is integrally formed with five lugs 2, and each lug 2 is provided with a mounting hole 3.

[0024] A sealing groove is formed on the bottom of the water pump housing 1, and a sealing ring 4 is installed in the sealing groove; the bottom of the water pump housing 1 is open, a motor stator 5 is installed in the recess of the water pump housing 1, and a motor rotor 6 with a ring structure is installed around the motor stator 5.

[0025] The motor rotor 6 is an open top structure, the motor rotor 6 is covered outside the motor stator 5, a mounting hole is formed at the center of the motor rotor 6, and a driving shaft 7 is installed in the mounting hole.

[0026] The middle part of the water pump shell 1 is fixedly installed with a PCBA 8, the PCBA 8 is a ring structure, the bottom of the water pump shell 1 is oppositely installed with an impeller 9, the driving shaft 7 penetrates through the PCBA 8 and the mounting hole in the middle part of the rotor and is oppositely installed with the impeller 9.

[0027] The top of the water pump shell 1 is installed with a connector 10, and the motor stator 5 is wound with a stator lead-out wire 11, the stator lead-out wire 11 is fixedly welded with the PCBA 8 and is led out from the connector 10 at the top.

[0028] The utility model re-designs the structure design of originally stator in - rotor in - water pump impeller 9 in front - controller behind, and optimizes the structure design of motor stator 5 in - motor rotor 6 in - controller in, reduces the volume of water pump 40% or so.

[0029] The controller in the utility model is built-in, the product volume is reduced, the length of the driving shaft 7 is shortened, and the stability and cost are optimized.

[0030] The motor rotor 6 in the utility model is external, the torque is larger, and the water pump can be ensured to work stably in some harsh environments.

[0031] The water pump of the utility model guarantees sealing through the sealing ring 4, the motor rotor 6, the motor stator 5 and the PCBA 8 are all immersed in water liquid, the water liquid flows slowly at the PCBA 8, impact is not caused, the water cooling effect can be achieved, and the working stability of the water pump is guaranteed.

[0032] The specific embodiments described in the present application are only examples of the concept of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the range defined by the attached claims.

Claims

1. A small volume water pump structure, characterized by: The water pump shell comprises an inner recess structure, the bottom of the water pump shell is open, a motor stator is arranged in the recess of the water pump shell, a ring-shaped motor rotor is arranged on the periphery of the motor stator, a PCBA is arranged in the middle of the water pump shell, an impeller is arranged on the bottom of the water pump shell, and a connector is arranged on the top of the water pump shell.

2. A small volume water pump structure according to claim 1, characterized in that: The motor rotor is of an open top structure, and the motor rotor is covered on the motor stator.

3. A small volume water pump structure according to claim 2, characterized in that: An assembly hole is arranged at the center of the motor rotor, and a driving shaft penetrates through the assembly hole and is assembled with the impeller.

4. The small volume water pump structure according to claim 1, characterized in that: A stator lead-out wire is wound on the motor stator, the stator lead-out wire is welded with the PCBA and is led out from the connector.

5. The small volume water pump structure according to claim 1, characterized in that: The PCBA is of a ring structure.

6. A small volume water pump structure according to claim 1, characterized in that: A sealing groove is arranged on the opposite surface of the bottom of the water pump shell, and a sealing ring is arranged in the sealing groove.

7. A small volume water pump structure according to claim 6, characterized in that: A plurality of hanging ears are integrally formed on the outer wall of the water pump shell, and an installation hole is arranged on each hanging ear.

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