Motor stator structure for electronic water pump

Abstract

A motor stator structure for an electronic water pump provided by the present invention comprises a stator iron core, a skeleton, a plurality of iron core units and a closed stator iron core tooling, the cross section of the skeleton is in a circular shape with a hollow inner side, the skeleton is connected to the inner side wall of the stator iron core, the plurality of iron core units are arranged on the inner side of the skeleton at intervals along the circumferential direction of the skeleton, and the closed stator iron core tooling is arranged on the skeleton. Each iron core unit comprises a winding part and an iron core part, one end of the winding part is connected to the inner side wall of the framework, and the iron core part is connected to the other end of the winding part; and the closed stator iron core tool is detachably connected between two adjacent iron core parts, so that the plurality of iron core parts are encircled and connected to form an iron core structure with a circumferential cross section. According to the closed stator iron core tool, gaps between the iron core parts are filled, magnetic leakage is reduced, and magnetic induction intensity is improved, so that motor cogging torque is reduced, noise generated by a motor is reduced, the winding part can optimize a winding and arranging mode, the process manufacturing precision is improved, and the working efficiency of the motor is prevented from being interfered.

Description

Technical Field

[0001] The invention relates to the technical field of electronic water pumps, in particular to a motor stator structure used for electronic water pumps. Background Art

[0002] With the development of society and the increasing popularity of new energy vehicles, people have put forward higher requirements on the product performance of electronic water pumps. How to reduce the vibration frequency of the motor, improve the stator structure, and further optimize the manufacturing method of the electronic water pump are the problems that motor engineers urgently need to solve.

[0003] The stator core of the existing stator used for electronic water pumps is composed of silicon steel sheets with a tooth slot structure. When the motor is working, the force between the stator and the rotor is generated by electromagnetic force, but the water pump will produce a tooth slot torque due to the influence of the stator tooth slot structure. The tooth slot torque will increase the vibration frequency of the electronic water pump and generate noise. The long-term operation of the electronic water pump under complex and harsh working conditions will reduce the service life.

[0004] In view of this, it is necessary to propose a motor stator structure for an electronic water pump to solve or at least alleviate the above defects. Summary of the invention

[0005] The main purpose of the present invention is to provide a motor stator structure for an electronic water pump to solve the problem of high vibration frequency and high noise of the electronic water pump in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides a motor stator structure for an electronic water pump, comprising a stator core, a frame, a plurality of core units and a closed stator core tooling; wherein,

[0007] The cross section of the skeleton is in the shape of a circle with a hollow interior, the skeleton is connected to the inner wall of the stator core, and a plurality of the core units are arranged at intervals along the circumference of the skeleton on the inner side of the skeleton; wherein,

[0008] Each of the core units includes a winding part and a core part, one end of the winding part is connected to the inner wall of the frame, and the core part is connected to the other end of the winding part; the closed stator core tooling is detachably connected between two adjacent core parts to enclose and connect multiple core parts to form a core structure with a circular cross-section.

[0009] Preferably, each of the closed stator core tooling includes a core block and two clamps arranged opposite to each other along the extension direction of the core block, the core block is extended vertically, the two clamps are respectively connected to the two ends of the core block along the vertical direction, each of the clamps is protruded outward along the circumference of the skeleton to form two connecting ends, and the two connecting ends are respectively connected to two adjacent core parts.

[0010] Preferably, each of the core parts is provided with two slot units arranged vertically opposite to each other, each of the slot units includes slots arranged circumferentially opposite to each other along the skeleton, and the two connecting ends of each of the clamps are respectively clamped and connected in the slots of two adjacent core parts.

[0011] Preferably, one end of each of the clamps facing the core block is recessed to form a groove, and both ends of the core block in the vertical direction are respectively connected to the grooves of the two clamps.

[0012] Preferably, the top and bottom ends of the winding portion are each provided with a plurality of winding grooves sequentially arranged along the radial direction of the frame, and each of the winding grooves is in an arc shape with an opening.

[0013] Preferably, it further comprises a waterproof cover, wherein the waterproof cover is connected to the inner side wall of the core part and the core block.

[0014] Preferably, the length of the core block is 15 cm to 20 cm.

[0015] Preferably, the winding grooves at the top and bottom ends of each winding portion are arranged correspondingly.

[0016] Preferably, the number of the winding grooves at the top end of each winding portion is six, and the six winding grooves are arranged sequentially along the radial direction of the skeleton.

[0017] Preferably, the core block is made of silicon steel sheet.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a motor stator structure for an electronic water pump, comprising a stator core, a frame, a plurality of core units and a closed stator core fixture, wherein the cross section of the frame is in the shape of a circle with a hollow inner side, the frame is connected to the inner side wall of the stator core, a plurality of core units are arranged on the inner side of the frame at intervals along the circumference of the frame, each core unit comprises a winding part and a core part, one end of the winding part is connected to the inner side wall of the frame, and the core part is connected to the other end of the winding part; the closed stator core fixture is detachably connected between two adjacent core parts to enclose and connect the plurality of core parts to form a core structure with a circular cross section. In this way, the closed stator core fixture fills the gap between the core parts, reduces magnetic leakage, and improves magnetic induction, thereby reducing the motor cogging torque, so as to reduce the noise generated by the motor, and the winding part can optimize the winding arrangement method, improve the process manufacturing accuracy, and avoid interfering with the motor working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention after removing the waterproof cover;

[0022] Figure 2 A three-dimensional schematic diagram of an application scenario of the overall structure in one embodiment of the present invention;

[0023] Figure 3 It is an exploded schematic diagram of a closed stator core tooling in one embodiment of the present invention;

[0024] Figure 4 It is a three-dimensional schematic diagram of an embodiment of the present invention after removing the waterproof cover and the closed stator core tooling.

[0025] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

[0026] Description of Figure Numbers:

[0027] 10. Closed stator core tooling; 110. Core block; 120. Clamp; 121. Connection end; 122. Groove; 20. Core unit; 210. Winding part; 211. Winding groove; 220. Core part; 221. Card slot; 30. Frame; 40. Stator core; 50. Waterproof cover. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Please refer to the attached Figure 1-4 In one embodiment of the present invention, a motor stator structure for an electronic water pump includes a stator core 40, a skeleton 30, a plurality of core units 20 and a closed stator core tooling 10. First of all, it should be noted that the inner side in the present application refers to the inner direction of the entire device; and the stator core 40 is different from the prior art, which is composed of silicon steel sheets with a tooth structure. When the motor is working, the force between the stator and the rotor is generated by electromagnetic force, but the water pump will generate tooth torque due to the influence of the stator tooth structure. The tooth torque will increase the vibration frequency of the electronic water pump and generate noise. The long-term operation of the electronic water pump under complex and harsh working conditions will reduce the service life. The present application solves the above-mentioned defects in the prior art by providing a motor stator structure for an electronic water pump, as follows:

[0033] The cross-section of the skeleton 30 is in the shape of a circle with a hollow inner side. The skeleton 30 is connected to the inner side wall of the stator core 40, and a plurality of the core units 20 are arranged on the inner side of the skeleton 30 at intervals along the circumference of the skeleton 30; wherein each of the core units 20 includes a winding portion 210 and a core portion 220, one end of the winding portion 210 is connected to the inner side wall of the skeleton 30, and the core portion 220 is connected to the other end of the winding portion 210; the closed stator core tooling 10 is detachably connected between two adjacent core portions 220 to enclose and connect a plurality of the core portions 220 to form a core structure with a circular cross-section.

[0034] Specifically, the motor stator structure for the electronic water pump in the present application includes a stator core 40, a skeleton 30, a plurality of core units 20 and a closed stator core tooling 10. The stator core 40 is the main mounting structure of the entire motor stator structure, and is usually in a hollow circular shape to facilitate the installation of the skeleton 30. Therefore, the skeleton 30 also needs to be in a circular shape to facilitate matching connection to the inner circumference of the stator core 40. The skeleton 30 is used for installation and connection of the core unit 20 to ensure the generation of electromagnetic force during normal operation. Therefore, the skeleton 30 also needs to be hollow inside to facilitate the connection of the core unit 20, so that the plurality of core units 20 are arranged on the inner side of the skeleton 30 at intervals along the circumference of the skeleton 30.

[0035] Each of the core units 20 includes a winding portion 210 and a core portion 220. The winding portion 210 is used for winding and laying the line to facilitate the routing and avoid the influence of the cluttered line on the internal structure. It is also convenient for technicians to process and lay the wires. One end of the winding portion 210 is connected to the inner wall of the frame 30, and the core portion 220 can also be installed. The core portion 220 serves as the core of the motor stator to generate electromagnetic force. It is connected to the other end of the winding portion 210. Since the core units 20 are arranged in an interval manner, the space between two adjacent core units 20 is There will be gaps between them, so the closed stator core tooling 10 is added to fill the gaps between the core parts 220 in two adjacent core units 20, and the multiple core parts 220 are combined with the closed stator core tooling 10 to form a circular core structure, which reduces magnetic leakage compared to the traditional core structure with multiple gaps to enhance the electromagnetic force. When the electromagnetic force is high enough, a higher cogging torque is not required, so the cogging torque is relatively reduced, thereby reducing the noise generated by the motor to ensure that the motor works with high efficiency and low noise.

[0036] As a preferred embodiment of the present invention, each of the closed stator core tooling 10 includes a core block 110 and two clamps 120 relatively arranged along the extension direction of the core block 110, the core block 110 is extended vertically, and the two clamps 120 are respectively connected to the two ends of the core block 110 along the vertical direction, and each of the clamps 120 is protruding outward along the circumference of the skeleton 30 to form two connecting ends 121, and the two connecting ends 121 are respectively connected to two adjacent core parts 220.

[0037] It should be noted that the core block 110 is made of the same material as the core of the core part 220 to ensure the same magnetic induction strength. Silicon steel sheets can usually be used. Silicon steel sheets have good magnetic permeability and low loss, and are the preferred material components to ensure good stability of the motor. The clamp 120 is used for fixing and installing the core block 110 so that the core block 110 can be stably located between two adjacent core parts 220. The two clamps 120 are respectively arranged vertically opposite to each other and connected to the core part 220, so that the core block 110 is connected between the two clamps 120. It can be understood that the two connecting ends 121 formed by the clamp 120 protruding outward along the circumference of the skeleton 30 are used to be connected to the two adjacent core parts 220 respectively, so that the connection is uniform and stable.

[0038] As a preferred embodiment of the present invention, each of the core parts 220 is provided with two slot 221 units arranged vertically opposite to each other, and each of the slot 221 units includes a slot 221 arranged circumferentially opposite to each other along the skeleton 30, and the two connecting ends 121 of each of the clamps 120 are respectively clamped and connected in the slots 221 of two adjacent core parts 220.

[0039] It should be noted that the two slot 221 units are used to match the upper and lower relatively arranged clamps 120 respectively, and each of the slot 221 units includes a slot 221 relatively arranged along the circumference of the skeleton 30, so that the two adjacent core parts 220 will have two openings of the slot 221 relatively arranged, so that the two connecting ends 121 of the clamp 120 can be respectively clamped and connected in the slots 221 of the two adjacent core parts 220. This makes installation more convenient, and the subsequent disassembly and maintenance are simple, and the replacement efficiency is fast.

[0040] As a preferred embodiment of the present invention, each of the clamps 120 has one end facing the core block 110 recessed to form a groove 122 , and both ends of the core block 110 along the vertical direction are respectively connected to the grooves 122 of the two clamps 120 .

[0041] It is worth noting that the groove 122 is used for inserting the core block 110 , and the core block 110 is fixedly installed by the clamp 120 by clamping both ends in the groove 122 . This installation method is fast and easy to process and produce.

[0042] As a preferred embodiment of the present invention, the top and bottom ends of the winding portion 210 are provided with a plurality of winding grooves 211 sequentially arranged along the radial direction of the frame 30, and each of the winding grooves 211 is in an arc shape with an opening.

[0043] It is worth noting that the traditional winding method of the motor stator is only a winding surface structure, which directly winds the cable on the surface, but this is inconvenient for wiring and the cables are easily entangled with each other. In the present application, a plurality of winding grooves 211 are opened at the top and bottom ends of each winding part 210, so that a bundle of cables can be wound in each winding groove 211, the wiring is clear, the internal structure is well planned, and the process manufacturing accuracy is greatly improved; preferably, the winding grooves 211 at the top and bottom ends of each winding part 210 are arranged correspondingly, and corresponding here means that the number of winding grooves 211 at the top and bottom ends is the same and the arrangement method is consistent, so that each bundle of cables can be located in the top and bottom winding grooves 211 in the same vertical plane when it is wound around the winding part 210 once, the arrangement is more reasonable, and the winding installation is stable.

[0044] Furthermore, it also includes a waterproof cover 50 , which is connected to the inner side walls of the core portion 220 and the core block 110 .

[0045] It should be noted that the waterproof cover 50 plays a role of waterproofing and heat conduction inside, and is connected to the inner side walls of the core part 220 and the core block 110 to protect the core part 220 and the core block 110 .

[0046] Furthermore, the length of the core block 110 is 15 cm to 20 cm.

[0047] It should be understood that the length of the core block 110 can be matched with the core part 220 to ensure the same enhancement of magnetic induction intensity. In the present application as a preferred embodiment, the length of the core block 110 can be set to 15cm~20cm, and technical personnel in this field can set it according to actual needs.

[0048] Furthermore, the number of the winding grooves 211 at the top of each winding portion 210 is six, and the six winding grooves 211 are arranged in sequence along the radial direction of the skeleton 30 .

[0049] It should be noted that the number of winding grooves 211 at the top of each winding portion 210 can be determined according to the actual width of the winding groove 211 and the width of the winding portion 210, and the width of the winding groove 211 can be set according to the diameter of the cable. In the present application, preferably, the number of winding grooves 211 at the top of each winding portion 210 can be set to six, and similarly, the number of winding grooves 211 at the bottom is also six.

[0050] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A motor stator structure for an electronic water pump, characterized in that: It includes a stator core, a frame, a plurality of core units and a closed stator core tooling; wherein, The cross section of the skeleton is in the shape of a circle with a hollow interior, the skeleton is connected to the inner wall of the stator core, and a plurality of the core units are arranged at intervals along the circumference of the skeleton on the inner side of the skeleton; wherein, Each of the core units includes a winding part and a core part, one end of the winding part is connected to the inner wall of the frame, and the core part is connected to the other end of the winding part; the closed stator core tooling is detachably connected between two adjacent core parts to enclose and connect multiple core parts to form a core structure with a circular cross-section.

2. The motor stator structure for an electronic water pump according to claim 1, characterized in that: Each of the closed stator core fixtures includes a core block and two clamps arranged opposite to each other along the extension direction of the core block. The core block is extended vertically, and the two clamps are respectively connected to the two ends of the core block along the vertical direction. Each of the clamps is protruding outward along the circumference of the skeleton to form two connecting ends, and the two connecting ends are respectively connected to two adjacent core parts.

3. The motor stator structure for an electronic water pump according to claim 2, characterized in that: Each of the core parts is provided with two slot units arranged vertically opposite to each other, each of the slot units includes slots arranged circumferentially opposite to each other along the frame, and the two connecting ends of each of the clamps are respectively clamped and connected in the slots of two adjacent core parts.

4. The motor stator structure for an electronic water pump according to claim 3, characterized in that: One end of each of the clamps facing the core block is recessed to form a groove, and both ends of the core block in the vertical direction are respectively connected to the grooves of the two clamps.

5. The motor stator structure for an electronic water pump according to claim 1, characterized in that: A plurality of winding grooves arranged in sequence along the radial direction of the frame are provided at the top and bottom ends of the winding portion, and each of the winding grooves is in an arc shape with an opening.

6. The motor stator structure for an electronic water pump according to claim 2, characterized in that: It also includes a waterproof sleeve, which is connected to the inner side wall of the core part and the core block.

7. The motor stator structure for an electronic water pump according to claim 2, characterized in that: The length of the core block is 15 cm to 20 cm.

8. The motor stator structure for an electronic water pump according to claim 5, characterized in that: The winding grooves at the top and bottom ends of each winding portion are arranged correspondingly.

9. The motor stator structure for an electronic water pump according to claim 8, characterized in that: The number of winding grooves at the top end of each winding portion is six, and the six winding grooves are arranged in sequence along the radial direction of the skeleton.

10. The motor stator structure for an electronic water pump according to claim 2, characterized in that: The iron core block is made of silicon steel sheet.

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