Motor stator assembly

Abstract

The utility model discloses a motor stator assembly, and belongs to the technical field of motors, the motor stator assembly comprises a circuit board, a plurality of laminations and coil windings wound on the laminations, the plurality of laminations are regularly arranged to form a stator iron core of a circular ring structure, the laminations are of a long-strip-shaped structure, the cross section of each lamination is I-shaped, stator frameworks are installed at the two ends of each lamination, and the coil windings are wound on the laminations. The coil is wound outside the end faces of the lamination and the stator framework to form a coil winding, and the circuit board is of a circular ring structure and is installed on the stator framework. The stator framework structure is optimized, the PCB is installed, winding and wiring of the motor stator can be further simplified, and therefore production and processing of products are simplified.

Description

Technical Field

[0001] This application relates to the technical field of electric machinery, and more particularly to an electric machine stator assembly. Background Art

[0002] An electric machine, commonly known as a motor, is an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction. An electric machine generally includes a stator and a rotor. The stator includes laminations and a coil winding wound around the laminations. The rotor includes a rotating shaft and a rotor core sleeved on the rotating shaft, and permanent magnets are provided on the outer edge of the rotor core. The main function of the electric machine in a circuit is to generate a driving torque and serve as a power source for electrical appliances or various machines.

[0003] The main function of the electric machine stator is to generate a rotating magnetic field, while the main function of the rotor is to be cut by magnetic lines of force in the rotating magnetic field to generate (output) current. Related prior art such as the Chinese patent application "Stator for Switched Reluctance Motor", application number: CN202410314047.9; discloses that: the stator includes: laminations and a plurality of stator windings. The laminations have an annular housing and a plurality of stator teeth. The plurality of stator teeth are uniformly arranged on the inner surface of the annular housing at a predetermined interval and extend from the inner surface of the annular housing along the radial direction of the annular housing towards the center of the annular housing for a first extension length. The stator windings are respectively wound around the outer peripheral surfaces of the respective stator teeth.

[0004] When winding the existing electric machine stator, it is necessary to reserve the wires of the winding, then merge and lead them out to be connected to the PCB board, which requires high requirements for workers. If the workers connect the wires wrongly, the entire stator winding will be scrapped. The inventor of this application has made further improvements. Summary of the Utility Model

[0005] The technical problem to be solved by this application is to provide an electric machine stator assembly, optimize the stator skeleton structure, and install the PCB board, which can further simplify the winding and wiring of the electric machine stator, thereby simplifying the production and processing of the product.

[0006] The technical solution adopted by this application is: an electric machine stator assembly, including a circuit board, a plurality of laminations, and a coil winding wound around the laminations. The plurality of laminations are regularly arranged to form a stator core with a circular ring structure. The laminations are in a long strip structure, and the cross-section of the laminations is in an I-shaped structure. Stator skeletons are installed at both ends of the laminations. The coil is wound around the end faces of the laminations and the stator skeletons to form a coil winding. The circuit board is in a circular ring structure and is installed on the stator skeleton.

[0007] Compared with the prior art, the advantages of the present application are as follows: A circuit board adapted to the entire motor stator structure is designed, that is, a circuit board with an annular structure. Then, the installation of the circuit board is realized through the stator skeleton, and the circuit board is close to the laminated core, that is, close to the coil winding. Then, the wires of each coil winding in the present application do not need to be reserved very long. After the circuit board is installed on the stator skeleton, the lead wires of the coil winding only need to be led out a little and welded to the PCB. The design of the above structural solution greatly reduces the requirements for workers to wind the wires, and significantly reduces the scrap rate caused by incorrect wiring of workers. In addition, a stator skeleton is added, and the setting of the stator skeleton well restricts the winding position of the coil winding, making the winding more regular. Moreover, the addition of the stator skeleton can also effectively reduce the contact friction between the wires in the coil winding and the laminated core, playing a role in protecting the coil wires and avoiding the problem of the paint coating of the enameled wire being damaged.

[0008] In some embodiments of the present application, the laminated core includes an inner retaining strip, an outer retaining strip and a longitudinal strip. The inner retaining strip, the longitudinal strip and the outer retaining strip form two winding grooves on the left and right. The inner retaining strips of multiple laminated cores form the inner ring of the stator core, and the outer retaining strips of multiple laminated cores form the outer ring of the stator core. The longitudinal strip is arranged along the radial direction of the iron core, and the longitudinal strip connects the inner retaining strip and the outer retaining strip. The laminated core with the above structure has a good restricting and regularizing effect when the coil is wound, making the coil winding regular.

[0009] In some embodiments of the present application, the inner side wall surface of the inner retaining strip close to the central axis of the stator core is an inwardly concave arc surface, and the outer side wall surface of the outer retaining strip away from the central axis of the stator core is an outwardly convex arc surface. The above structure makes the laminated cores form a relatively regular ring structure after being connected.

[0010] In some embodiments of the present application, a clamping protrusion is provided at one end of the outer retaining strip, and a clamping groove adapted to the structure of the clamping protrusion is provided at the other end of the outer retaining strip. The clamping protrusion of the laminated core is embedded into the clamping groove of the adjacent laminated core.

[0011] In the present application, the connection of adjacent laminated cores is realized by providing a clamping protrusion and a clamping groove on the outer retaining strip, so that multiple laminated cores are regularly arranged to form a stator core with an annular structure.

[0012] In the present application, no additional connection structure is provided between the inner retaining strips of two adjacent laminated cores. Therefore, the connection between the laminated cores in the present application is relatively simple and convenient.

[0013] In some embodiments of the present application, the stator skeleton includes two embedding frames symmetrically arranged on the left and right. The embedding frames are in a U-shaped frame structure and extend into the laminated core. The embedding frames are attached to the wall surface of the winding groove formed by the inner retaining strip, the longitudinal strip, and the outer retaining strip. In the present application, the stable and reliable installation of the stator skeleton is achieved through the two embedding frames extending into the laminated core on the left and right.

[0014] In some embodiments of the present application, the stator skeleton includes a bottom plate, and the bottom plate connects the two embedding frames on the left and right. The bottom plate is attached to the top surface of the laminated core, and the wires of the coil winding sequentially bypass the left embedding frame, the bottom plate, and the right embedding frame. That is, it has a good protective effect on the corners of the coil winding.

[0015] In some embodiments of the present application, the stator skeleton includes an inner retaining piece and an outer retaining piece. The inner retaining piece is arranged on the inner retaining strip and is higher than the bottom plate. The outer retaining piece is arranged on the outer retaining strip and is higher than the bottom plate. The inner retaining piece, the bottom plate, and the outer retaining piece form a groove with a U-shaped structure.

[0016] In the present application, through the structural settings of the inner retaining piece and the outer retaining piece, the coil winding is further blocked, thereby regularizing the winding of the coil winding.

[0017] In some embodiments of the present application, a first limiting post and a second limiting post are arranged on the stator skeleton on one side of the stator core, and the first limiting post and the second limiting post act on the circuit board.

[0018] In the present application, the circuit board is arranged on one side of the stator core, and accordingly, the structure of the stator skeleton on that side is designed accordingly to assist in the installation and positioning of the circuit board. In the present application, it is embodied as the arrangement of the first limiting post and the second limiting post.

[0019] In some embodiments of the present application, the first limiting post is attached to the bottom surface of the circuit board. In the present application, multiple first limiting posts play a role of supporting and limiting, and lift the circuit board.

[0020] A limiting groove is opened corresponding to the second limiting post at the outer peripheral edge of the circuit board, and the end of the second limiting post is clamped into the limiting groove. In the present application, multiple second limiting posts play a role of limiting the outer periphery of the circuit board.

[0021] On the basis of conforming to the common knowledge in the art, the above embodiments can be combined arbitrarily. Description of the Drawings

[0022] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Figure 1 is a schematic structural diagram of the present application;

[0024] Figure 2 is a schematic structural diagram of the connection state of the stator skeleton in the present application;

[0025] Figure 3 is a schematic structural diagram of the laminated core in the present application;

[0026] Figure 4 is a schematic structural diagram of the stator skeleton in the present application.

[0027] Among them, the specific descriptions of the reference numerals are as follows: 1. Circuit board; 2. Laminated core; 21. Inner retaining strip; 22. Outer retaining strip; 23. Longitudinal strip; 3. Stator core; 4. Stator skeleton; 41. Embedding frame; 42. Bottom plate; 43. Inner retaining piece; 44. Outer retaining piece; 5. Clamping projection; 6. Card slot; 7. First limiting post; 8. Second limiting post. Detailed implementation manners

[0028] The present application will be described in detail below in conjunction with the accompanying drawings.

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] A motor stator assembly, as shown in Embodiment 1 Figure 1 includes a circuit board 1, a plurality of laminated cores 2, and a coil winding wound around the laminated cores 2. The plurality of laminated cores 2 are regularly arranged to form a circular ring-shaped stator core 3. The laminated core 2 is in a long strip structure, and the cross-section of the laminated core 2 is in an I-shaped structure. Stator skeletons 4 are installed at both ends of the laminated core 2. The coil is wound outside the end faces of the laminated core 2 and the stator skeleton 4 to form a coil winding. The setting of the stator skeleton 4 well restricts the winding position of the coil winding, making the winding more regular. Moreover, the addition of the stator skeleton 4 can also effectively reduce the contact friction between the wires in the coil winding and the laminated core 2, playing a role in protecting the coil wires and avoiding the problem of the paint coating of the enameled wire being damaged.

[0031] The circuit board 1 is in an annular structure and is installed on the stator skeleton 4. The circuit board 1 designed to be adapted to the entire motor stator structure is installed through the stator skeleton 4, and the circuit board 1 is made closer to the laminations 2, that is, closer to the coil windings. Then, the wires of each coil winding in this application do not need to be reserved very long. After the circuit board 1 is installed on the stator skeleton 4, the lead wires of the coil windings only need to be led out a little and welded to the PCB.

[0032] The design of the above structural solution will reduce the requirements for workers to wind the wires a lot, and greatly reduce the rejection rate caused by workers' wiring errors.

[0033] In this application, the coil windings are not specifically shown, but those skilled in the art can understand that the coils are wound outside the laminations 2, and there is no difference in the winding position from the prior art.

[0034] Embodiment 2, as Figures 1 to 3 shown, the lamination 2 includes an inner retaining strip 21, an outer retaining strip 22 and a longitudinal strip 23. The inner retaining strip 21, the longitudinal strip 23 and the outer retaining strip 22 form two left and right wire grooves. The inner retaining strips 21 of multiple laminations 2 form the inner ring of the stator core 3, and the outer retaining strips 22 of multiple laminations 2 form the outer ring of the stator core 3. The longitudinal strip 23 is arranged along the radial direction of the iron core, and the longitudinal strip 23 connects the inner retaining strip 21 and the outer retaining strip 22. The lamination 2 with the above structure has a good limiting and regularizing effect when the coil is wound, making the coil windings regular.

[0035] The inner side wall surface of the inner retaining strip 21 close to the central axis of the stator core 3 is an inwardly concave arc surface, and the outer side wall surface of the outer retaining strip 22 far from the central axis of the stator core 3 is an outwardly convex arc surface. The above structure makes the laminations 2 form a relatively regular ring structure after being connected.

[0036] A clamping protrusion 5 is provided at one end of the outer retaining strip 22, and a clamping groove 6 adapted to the structure of the clamping protrusion 5 is provided at the other end of the outer retaining strip 22. The clamping protrusion 5 of the lamination 2 is embedded into the clamping groove 6 of the adjacent lamination 2. In this application, the connection of adjacent laminations 2 is realized by providing the clamping protrusion 5 and the clamping groove 6 on the outer retaining strip 22, so that multiple laminations 2 are regularly arranged to form the stator core 3 in an annular structure. In this application, no additional connection structure is provided for the inner retaining strips 21 of two adjacent laminations 2. Therefore, the connection of the laminations 2 in this application is relatively simple and convenient.

[0037] Other contents of Embodiment 2 are the same as those of Embodiment 1.

[0038] Embodiment 3, as Figures 1 to 4As shown, the stator skeleton 4 includes two embedding frames 41 symmetrically arranged on the left and right. The embedding frame 41 has a U-shaped frame structure. The embedding frame 41 extends into the lamination 2, and the embedding frame 41 fits on the wall surface of the winding groove formed by the inner retaining strip 21, the longitudinal strip 23, and the outer retaining strip 22. In this application, the stable and reliable installation of the stator skeleton 4 is achieved through the two embedding frames 41 on the left and right that extend into the lamination 2.

[0039] The stator skeleton 4 includes a bottom plate 42. The bottom plate 42 connects the two embedding frames 41 on the left and right. The bottom plate 42 fits on the top surface of the lamination 2. The wires of the coil winding sequentially bypass the left embedding frame 41, the bottom plate 42, and the right embedding frame 41. That is, it has a good protective effect on the corners of the coil winding.

[0040] The stator skeleton 4 includes an inner retaining piece 43 and an outer retaining piece 44. The inner retaining piece 43 is arranged on the inner retaining strip 21, and the inner retaining piece 43 is set higher than the bottom plate 42. The outer retaining piece 44 is arranged on the outer retaining strip 22, and the outer retaining piece 44 is set higher than the bottom plate 42. The inner retaining piece 43, the bottom plate 42, and the outer retaining piece 44 form a groove with a U-shaped structure. In this application, through the structural settings of the inner retaining piece 43 and the outer retaining piece 44, the coil winding is further blocked, thereby regularizing the winding of the coil winding.

[0041] The other contents of Embodiment 3 are the same as those of Embodiment 1 or Embodiment 2.

[0042] Embodiment 4, as Figures 1 to 4 shown, a first limiting post 7 and a second limiting post 8 are arranged on the stator skeleton 4 on one side of the stator core 3. The first limiting post 7 and the second limiting post 8 act on the circuit board 1. In this application, the circuit board 1 is arranged on one side of the stator core 3. Correspondingly, the structure of the stator skeleton 4 on this side is designed accordingly to assist in the installation and positioning of the circuit board 1. In this application, it is embodied as the arrangement of the first limiting post 7 and the second limiting post 8.

[0043] The first limiting post 7 is arranged to fit on the bottom surface of the circuit board 1. In this application, multiple first limiting posts 7 play a role of supporting and limiting, lifting the circuit board 1.

[0044] A limiting groove is correspondingly opened at the outer peripheral edge of the circuit board 1 for the second limiting post 8. The end of the second limiting post 8 is clamped into the limiting groove. In this application, multiple second limiting posts 8 play a role of limiting the outer periphery of the circuit board 1.

[0045] The other contents of Embodiment 4 are the same as those of any of the above embodiments.

[0046] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A motor stator assembly, characterized in that: The invention comprises a circuit board (1), a plurality of laminations (2), and a coil winding wound on the laminations (2); the plurality of laminations (2) are regularly arranged to form a stator core (3) of a circular ring structure; the laminations (2) are of a long strip structure; the cross section of the laminations (2) is in an I-shape; stator frames (4) are mounted on both ends of the laminations (2); the coil is wound around the end surfaces of the laminations (2) and the stator frame (4) to form the coil winding; and the circuit board (1) is of a circular ring structure and is mounted on the stator frame (4).

2. The motor stator assembly according to claim 1, characterized in that: The laminations (2) include inner stop bars (21), outer stop bars (22) and longitudinal bars (23); the inner stop bars (21), the longitudinal bars (23) and the outer stop bars (22) form two left and right winding slots; the inner stop bars (21) of the plurality of laminations (2) form an inner ring of the stator core (3); the outer stop bars (22) of the plurality of laminations (2) form an outer ring of the stator core (3); the longitudinal bars (23) are arranged along the radial direction of the core; the longitudinal bars (23) connect the inner stop bars (21) and the outer stop bars (22).

3. The motor stator assembly according to claim 2, characterized in that: The inner wall surface of the inner stop bar (21) close to the central axis of the stator core (3) is a concave arc surface, and the outer wall surface of the outer stop bar (22) away from the central axis of the stator core (3) is a convex arc surface.

4. A motor stator assembly according to claim 3, characterized in that: A latching protrusion (5) is provided at one end of the outer baffle (22), and a latching groove (6) adapted to the structure of the latching protrusion (5) is provided at the other end of the outer baffle (22); the latching protrusion (5) of the laminate (2) is embedded in the latching groove (6) of the adjacent laminate (2).

5. The motor stator assembly according to claim 1, characterized in that: The stator frame (4) comprises two embedded frames (41) arranged symmetrically on the left and right, the embedded frames (41) forming a U-shaped frame structure, the embedded frames (41) extending into the laminated sheets (2), and the embedded frames (41) being attached to the wall surface of the winding groove formed by the inner stop bar (21), the longitudinal bar (23) and the outer stop bar (22).

6. The motor stator assembly according to claim 5, characterized in that: The stator frame (4) comprises a bottom plate (42), the bottom plate (42) being connected to two left and right embedded frames (41), the bottom plate (42) being attached to the top surface of the laminate (2), and the wires of the coil winding are passed through the left embedded frame (41), the bottom plate (42), and the right embedded frame (41) in sequence.

7. The motor stator assembly according to claim 6, characterized in that: The stator frame (4) comprises an inner baffle (43) and an outer baffle (44); the inner baffle (43) is arranged on the inner baffle bar (21), and the inner baffle (43) is arranged higher than the bottom plate (42); the outer baffle (44) is arranged on the outer baffle bar (22), and the outer baffle (44) is arranged higher than the bottom plate (42); the inner baffle (43), the bottom plate (42), and the outer baffle (44) form a groove with a U-shaped structure.

8. The motor stator assembly according to claim 1, characterized in that: A first limiting column (7) and a second limiting column (8) are provided on the stator frame (4) located on one side of the stator core (3), and the first limiting column (7) and the second limiting column (8) act on the circuit board (1).

9. The motor stator assembly according to claim 8, characterized in that: The first limiting column (7) is arranged to fit on the bottom surface of the circuit board (1).

10. The motor stator assembly according to claim 8, characterized in that: A limiting groove is provided at the outer peripheral edge of the circuit board (1) corresponding to the second limiting column (8), and the end of the second limiting column (8) is inserted into the limiting groove.

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