A fixing structure for a stator of an electronic water pump motor and an electronic water pump motor

Abstract

The utility model discloses a fixing structure of an electronic water pump motor stator and an electronic water pump motor, comprising: a housing, provided with an installation cavity, the installation cavity is formed with a first step surface, and the peripheral wall of the installation cavity is provided with a positioning notch; a stator assembly, including a stator core, the peripheral wall of the stator core is provided with a positioning protrusion, and the positioning protrusion is embedded in the positioning notch; a limiting clamping structure, which is used to press the upper end of the stator core downward to fix the stator assembly. The utility model uses the first step surface to support the stator core, uses the positioning protrusion to adapt to the width of the positioning notch and embed it into the positioning notch, so as to achieve circumferential positioning of the stator core and the stator assembly, and then uses the limiting clamping structure to press the upper end of the stator core downward to fix the stator assembly, thereby achieving axial positioning and fixing of the stator assembly, so that the positioning and installation of the stator assembly can be easily achieved, and the stator does not need to be heated during installation, which reduces energy consumption and makes the assembly process simpler and more flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pump motors, in particular to a fixing structure of a stator of an electronic water pump motor and the electronic water pump motor. Background Art

[0002] Electronic water pump motors are the power source for new water circulation systems such as new energy vehicles. This type of motor has gradually become the mainstream configuration of automobiles due to its high efficiency, high reliability, low noise and good control performance.

[0003] With the development of society, the increasing demand for energy and the national carbon peak requirements, new requirements have been put forward for energy conservation and emission reduction. How to reduce energy consumption in the production process from the design level and optimize the structural design of the electronic water pump motor to reduce energy consumption in the assembly process are the current electronic water pump design problems that need to be solved urgently. The existing water pump housing and stator core for electronic water pumps are fixed by shrink sleeve and glue. When designing the parts, the outer diameter of the stator core and the inner diameter of the water pump housing are interference fit. Before assembly, the water pump housing is heated to a certain temperature. After the inner diameter of the water pump housing expands, the stator is installed into the water pump housing, and then glue is added for curing; the assembly requires heating and energy consumption, which increases the complexity of the process and reduces the flexibility of assembly. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a fixing structure of an electronic water pump motor stator, which can facilitate the fixed installation of the stator, and the stator does not need to be heated during installation.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A fixing structure for a stator of an electronic water pump motor comprises: a shell, provided with an installation cavity with an upper opening, a first step surface formed on the bottom peripheral wall of the installation cavity, and a positioning notch with an upper opening on the peripheral wall of the installation cavity; a stator assembly, comprising a stator core arranged on the periphery, the peripheral wall of the stator core being provided with a positioning protrusion protruding outward, the positioning protrusion being adapted to the width of the positioning notch and being embedded in the positioning notch to achieve circumferential positioning, and the peripheral edge of the bottom of the stator core being supported on the first step surface; a limiting clamping structure, fixedly arranged on the inner wall of the installation cavity, and used for pressing the upper end of the stator core downward to fix the stator assembly.

[0007] Furthermore, a second step surface is formed on the upper end of the first step surface on the peripheral wall of the installation cavity, and the upper end of the positioning notch extends to the second step surface.

[0008] Furthermore, the second step surface is provided with an avoidance groove on one side of the positioning notch, the avoidance groove is provided with a threaded hole on the side wall facing the positioning notch, the threaded hole extends to the side wall of the positioning notch, a set screw is installed in the threaded hole, and the set screw abuts against the positioning protrusion.

[0009] Furthermore, the side wall of the positioning protrusion is provided with a positioning groove corresponding to the set screw, and the end of the set screw is embedded in the positioning groove and abuts against the bottom wall of the positioning groove.

[0010] Furthermore, the second step surface is provided with a sunken groove, one end of the limiting and clamping structure is fixedly connected to the edge of the sunken groove, and the other end extends out of the edge of the second step surface to clamp and limit the upper end of the stator core.

[0011] Furthermore, a pressing groove is provided at the upper edge of the stator core corresponding to the sinking groove, and the outer end of the limiting pressing structure is embedded in the pressing groove and presses the bottom wall of the pressing groove.

[0012] Furthermore, the sinking grooves, pressing grooves and limiting pressing structures are arranged in a circle in multiple groups.

[0013] Furthermore, the stator assembly also includes an insulating frame and a wire-passing frame, the insulating frame is connected and fixed to the stator core, and the wire-passing frame is detachably mounted on the upper end of the insulating frame.

[0014] Furthermore, the insulating frame is provided with an upwardly extending plug post, the upper end of the plug post is provided with a locking protrusion protruding outward, the middle part of the upper end surface of the plug post is provided with a split, and the wire passing frame is provided with a socket for inserting the plug post, and the locking protrusion passes through the socket to limit the upward movement of the wire passing frame.

[0015] The utility model also provides an electronic water pump motor, comprising the above-mentioned fixing structure of the electronic water pump motor stator.

[0016] The utility model has the following beneficial effects:

[0017] The first step is used to support the stator core, and the component in the middle of the bottom of the stator assembly is suspended in the air without being squeezed or interfered by other structures. The positioning protrusion is adapted to the width of the positioning slot and embedded in the positioning slot to achieve circumferential positioning of the stator core and the stator assembly. The limiting clamping structure is then used to press the upper end of the stator core downward to fix the stator assembly, thereby achieving axial positioning and fixing of the stator assembly, making it easy to position and install the stator assembly. The stator does not need to be heated during installation, which reduces energy consumption and makes the assembly process simpler and more flexible.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the fixing structure of the stator of the electronic water pump motor of the utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the decomposed state structure;

[0022] Figure 3 It is a schematic diagram of the structure of another embodiment of the utility model in an exploded state;

[0023] Figure 4 yes Figure 3 A magnified view of point A;

[0024] Figure 5 is a structural schematic diagram of the stator assembly;

[0025] Figure 6 yes Figure 5 Enlarged view of point B.

[0026] Legend:

[0027] Housing 100, mounting cavity 110, first step surface 111, positioning notch 112, second step surface 113, sinking groove 114, avoidance groove 120, threaded hole 121, set screw 122;

[0028] Stator assembly 200, stator core 210, positioning protrusion 211, positioning embedded groove 212, pressing groove 213, notch 214, insulating frame 220, plug 221, positioning protrusion 222, split 223, plug block 224, positioning groove 225, wire rack 230, socket 231, plug 232, connector 233, positioning block 234, winding coil 240;

[0029] The limiting and pressing structure 300 . DETAILED DESCRIPTION

[0030] 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.

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) 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.

[0033] In addition, the descriptions of "first", "second", etc. in the present utility model 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 this 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 utility model.

[0034] Please refer to Figure 1 and Figure 2 A fixing structure of a stator of an electronic water pump motor in a preferred embodiment of the present invention includes a housing 100 , a stator assembly 200 and a limiting and pressing structure 300 .

[0035] The shell 100 is provided with an installation cavity 110 with an upper opening, and a first step surface 111 is formed on the bottom peripheral wall of the installation cavity 110. The first step surface 111 is higher than the bottom wall of the installation cavity 110, so as to accommodate the bottom center structure of the stator assembly 200; the peripheral wall of the installation cavity 110 is provided with a positioning notch 112 with an upper opening.

[0036] The stator assembly 200 includes a stator core 210 arranged on the periphery, and the peripheral wall of the stator core 210 is provided with a positioning protrusion 211 protruding outward. The positioning protrusion 211 is adapted to the width of the positioning slot 112 and embedded in the positioning slot 112 to achieve circumferential positioning. The bottom peripheral edge of the stator core 210 is supported on the first step surface 111. An end cover will be installed at the upper end of the shell 100 to seal the upper end of the installation cavity 110, and a sealing ring will be arranged between the upper end of the shell 100 and the end cover to improve the sealing performance.

[0037] The limiting and pressing structure 300 is fixedly disposed on the inner wall of the installation cavity 110 , and is used to press the upper end of the stator core 210 downward to fix the stator assembly 200 .

[0038] The utility model provides a fixing structure of the stator of an electronic water pump motor, which supports the stator core 210 by using a first step surface 111, and makes the components at the middle position of the bottom of the stator assembly 200 suspended in the air without being squeezed and interfered by other structures, and then uses the positioning protrusion 211 to adapt to the width of the positioning slot 112 and embed into the positioning slot 112 to realize the circumferential positioning of the stator core 210 and the stator assembly 200, and then uses the limiting clamping structure 300 to press the upper end of the stator core 210 downward to fix the stator assembly 200, thereby realizing the axial positioning and fixing of the stator assembly 200, so that the positioning and installation of the stator assembly can be conveniently realized, and the stator does not need to be heated during installation, which reduces energy consumption and makes the assembly process simpler and more flexible.

[0039] Reference Figure 3 and Figure 4 In some embodiments of the utility model, a second step surface 113 is formed on the upper end of the first step surface 111 on the peripheral wall of the installation cavity 110, and the upper end of the positioning groove 112 extends to the second step surface 113, thereby preventing the upper end of the positioning groove 112 from extending to the upper end surface of the shell 100, resulting in a notch on the upper end surface of the shell 100 and a reduced thickness at the notch, which affects the connection with the end cover and the arrangement of the sealing ring.

[0040] Reference Figure 4 In some embodiments of the utility model, the second step surface 113 is provided with an avoidance groove 120 on one side of the positioning notch 112, and the avoidance groove 120 is provided with a threaded hole 121 on the side wall facing the positioning notch 112, and the threaded hole 121 extends to the side wall of the positioning notch 112, and a fixing screw 122 is installed in the threaded hole 121, and the fixing screw 122 is abutted against the positioning protrusion 211, thereby eliminating the circumferential gap between the positioning protrusion 211 and the positioning notch 112, and reducing the collision and noise caused by vibration during operation.

[0041] Reference Figure 4 In some embodiments of the utility model, the side wall of the positioning protrusion 211 is provided with a positioning groove 212 corresponding to the locking screw 122, and the end of the locking screw 122 is embedded in the positioning groove 212 and abuts against the bottom wall of the positioning groove 212, so that the locking screw 122 is embedded in the positioning groove 212, which has a certain positioning effect and improves the assembly accuracy.

[0042] Reference Figure 4In some embodiments of the utility model, the second step surface 113 is provided with a sunken groove 114, one end of the limiting and clamping structure 300 is fixedly connected to the edge of the sunken groove 114, and the other end extends out of the edge of the second step surface 113 to clamp and limit the upper end of the stator core 210, thereby ensuring that there is no protruding structure on the surface of the second step surface 113. The arrangement of the limiting and clamping structure 300 is realized.

[0043] Specifically, the limiting and pressing structure 300 is a pressing piece integrally formed with the housing 100. During installation, the pressing piece is in an upright state. After the stator assembly 200 is installed into the installation cavity 110, the pressing piece in the upright state is bent inward by a tool punching, cold extrusion or other method to achieve Figure 4 In the state shown, the pressing sheet is pressed against the upper end of the stator core 210 .

[0044] Of course, in some other embodiments, the limiting and pressing structure 300 can also be installed on the second step surface 113 by welding, fasteners, etc., so as to press and fix the upper end of the stator core 210.

[0045] Reference Figure 3 and Figure 4 In a further embodiment of the utility model, the second step surface 113 is flush with the upper end surface of the stator core 210. In this way, during installation, it can be judged by naked eyes whether the stator assembly 200 is installed in place after entering the installation cavity. After it is in place, the limiting and clamping structure 300 is stamped or cold extruded. A pressing groove 213 is provided at the upper edge of the stator core 210 corresponding to the sinking groove 114. The outer end of the limiting and clamping structure 300 is embedded in the pressing groove 213 and presses the bottom wall of the pressing groove 213. The pressing groove 213 can accommodate the part of the limiting and clamping structure 300 that presses the stator core 210 so that it does not protrude from the upper end of the stator core 210, and the limiting and clamping structure 300 does not appear to be tilted after being pressed down, so that the clamping effect is better.

[0046] In a further embodiment of the present invention, the sinking grooves 114 , the pressing grooves 213 and the position-limiting and pressing structures 300 are arranged in a plurality of groups around each other, thereby achieving multi-position pressing and fixing, thereby improving the installation stability of the stator assembly 200 .

[0047] Reference Figure 5 and Figure 6In some embodiments of the present invention, the stator assembly 200 further includes an insulating frame 220 and a wire rack 230. The insulating frame 220 is connected and fixed to the stator core 210, and the wire rack 230 is detachably mounted on the upper end of the insulating frame 220. The wire rack 230 is provided with three plugs 232, each plug 232 is connected to a corresponding winding coil 240, specifically, the plug 232 is electrically connected to a connector 233, and the connector 233 is connected to the corresponding winding coil 240, thereby realizing the connection between the winding coil 240 and the corresponding plug. The insulating frame 220 facilitates the installation of the wire rack 230. Specifically, an insert block 224 is provided at the bottom of the wire rack 230, and the insert block 224 is inserted into the slot 214 of the stator core 210.

[0048] Reference Figure 5 and Figure 6 In a further embodiment of the utility model, the insulating frame 220 is provided with an upwardly extending plug post 221, the upper end of the plug post 221 is provided with a positioning protrusion 222 protruding outward, and the middle part of the upper end surface of the plug post 221 is provided with a split 223, and the wire frame 230 is provided with a socket 231 for inserting the plug post 221, and the positioning protrusion 222 passes through the socket 231 to limit the upward movement of the wire frame 230. Due to the existence of the positioning protrusion 222, the overall contour of the upper end of the socket 231 is larger than the socket 231, and the split 223 allows the upper end of the plug post 221 to face inward. It is deformed by folding. When installing, the column 221 is inserted into the socket 231, and the locking protrusion 222 is folded inward until it passes through the socket 231. The locking protrusion 222 is restored to its original state, which can limit the upward movement of the wire rack 230. The installation and disassembly are simple and convenient. When disassembling, you only need to pinch the upper end of the column 221 so that the locking protrusion 222 is folded inward to remove the wire rack 230. In addition, in order to improve the assembly accuracy, a positioning block 234 is also provided at the bottom of the wire rack 230, and the insulating frame 220 is provided with a positioning groove 225 for the positioning block 234 to be embedded.

[0049] The utility model also provides an electronic water pump motor, comprising the above-mentioned fixing structure of the electronic water pump motor stator.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixing structure for a stator of an electronic water pump motor, characterized in that: include: The housing (100) is provided with a mounting cavity (110) with an upper opening, a first step surface (111) is formed on a peripheral wall at the bottom of the mounting cavity (110), and a positioning notch (112) with an upper opening is provided on the peripheral wall of the mounting cavity (110); The stator assembly (200) comprises a stator core (210) arranged at the periphery, the peripheral wall of the stator core (210) is provided with a positioning protrusion (211) protruding outward, the positioning protrusion (211) is adapted to the width of the positioning notch (112) and is embedded in the positioning notch (112) to achieve circumferential positioning, and the peripheral edge of the bottom of the stator core (210) is supported on the first step surface (111); The limiting and pressing structure (300) is fixedly arranged on the inner wall of the installation cavity (110) and is used to press the upper end of the stator core (210) downward to fix the stator assembly (200).

2. The fixing structure of the electronic water pump motor stator according to claim 1, characterized in that: A second step surface (113) is formed on the upper end of the first step surface (111) on the peripheral wall of the installation cavity (110), and the upper end of the positioning notch (112) extends to the second step surface (113).

3. The fixing structure of the stator of the electronic water pump motor according to claim 2, characterized in that: The second step surface (113) is provided with an avoidance groove (120) on one side of the positioning notch (112); the avoidance groove (120) is provided with a threaded hole (121) on the side wall facing the positioning notch (112); the threaded hole (121) extends to the side wall of the positioning notch (112); a set screw (122) is installed in the threaded hole (121); and the set screw (122) abuts against the positioning protrusion (211).

4. The fixing structure of the electronic water pump motor stator according to claim 3, characterized in that: The side wall of the positioning protrusion (211) is provided with a positioning groove (212) corresponding to the set screw (122), and the end of the set screw (122) is embedded in the positioning groove (212) and abuts against the bottom wall of the positioning groove (212).

5. The fixing structure of the stator of the electronic water pump motor according to claim 2, characterized in that: The second step surface (113) is provided with a sunken groove (114), one end of the position limiting and pressing structure (300) is fixedly connected to the edge of the sunken groove (114), and the other end extends out of the edge of the second step surface (113) to press and limit the upper end of the stator core (210).

6. The fixing structure of the stator of the electronic water pump motor according to claim 5, characterized in that: The upper edge of the stator core (210) is provided with a pressing groove (213) corresponding to the sinking groove (114), and the outer end of the position-limiting pressing structure (300) is embedded in the pressing groove (213) and presses the bottom wall of the pressing groove (213).

7. The fixing structure of the stator of the electronic water pump motor according to claim 6, characterized in that: The sinking grooves (114), the pressing grooves (213) and the position-limiting pressing structures (300) are arranged in a plurality of groups.

8. The fixing structure of the stator of the electronic water pump motor according to claim 1, characterized in that: The stator assembly (200) further comprises an insulating frame (220) and a wire-passing frame (230); the insulating frame (220) is connected and fixed to the stator core (210); and the wire-passing frame (230) is detachably mounted on the upper end of the insulating frame (220).

9. The fixing structure of the stator of the electronic water pump motor according to claim 8, characterized in that: The insulating frame (220) is provided with an upwardly extending plug post (221), the upper end of the plug post (221) is provided with a locking protrusion (222) protruding outward, the middle part of the upper end surface of the plug post (221) is provided with a splitting opening (223), the wire passing frame (230) is provided with a socket (231) for the plug post (221) to be inserted, and the locking protrusion (222) passes through the socket (231) to limit the upward movement of the wire passing frame (230).

10. An electronic water pump motor, characterized in that: A fixing structure for the stator of an electronic water pump motor comprising any one of claims 1 to 9.

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