A segmented chain stator core

Abstract

The application provides a segmented chain type stator core, relates to the technical field of motors, and comprises a plurality of core segments, wherein two adjacent core segments are detachably connected, the plurality of core segments form a straight chain type structure when unfolded and form a circular ring chain type structure when enclosed; when the plurality of core segments are unfolded, one end of the core segments is a first segment, the other end of the core segments is a second segment, and the plurality of core segments between the first segment and the second segment are third segments; the third segments, the plurality of third segments and the second segment are assembled along the axial direction of the enclosed stator core and can rotate relative to each other; the second segment and the first segment are assembled along the arc direction of the enclosed stator core first and then along the axial direction of the enclosed stator core. The application completes the circle forming process of the stator core without welding, has high stability after being formed into a circle, and can directly enter subsequent plastic packaging processing.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a segmented chain stator core. Background Technology

[0002] The stator core is one of the stationary core components of a motor, forming the stator together with the stator windings and the frame. Current motor stator cores include solid circular, chain-type, and segmented types. Solid circular stator cores waste more material and are more expensive; segmented stator cores are pre-wound and then assembled, requiring strict control of the position of each segment, making the process cumbersome; chain-type stator cores are manufactured and wound in a circumferential "chain" shape, and then finally rolled into a circle – a new type of motor stator structure.

[0003] Although chain-type stator cores are easy to wind and simple to assemble, their disadvantages are that welding is required at the interface after the core is formed into a circle, which may affect the insulation performance of the surrounding area. Furthermore, the presence of the weld joint after welding results in an uneven outer diameter. Summary of the Invention

[0004] The purpose of this invention is to provide a segmented chain stator core that can complete the rounding process of the stator core without welding, and has high stability after rounding, and can directly enter the subsequent plastic encapsulation process.

[0005] This invention is achieved through the following technical solution: a segmented chain stator core, comprising multiple core segments, wherein two adjacent core segments can be detachably connected, and the multiple core segments form a straight chain structure when unfolded and a circular chain structure when enclosed; When the multiple core blocks are unfolded, the core block located at one end is the first block, the core block located at the other end is the second block, and the multiple core blocks located between the first and second blocks are all the third blocks. The third segment and the first segment, the multiple third segments, and the second segment and the third segment are all assembled along the axial direction of the enclosed stator core and can rotate relative to each other; The second block is first assembled with the first block along the arc direction of the enclosed stator core, and then assembled along the axial direction of the enclosed stator core, and after assembly, the stator core is kept in a circular chain structure.

[0006] Furthermore, the third block is pivotally connected to the first block, to multiple third blocks, and to the second block and the third block. The second block and the first block are first engaged and then pivotally connected.

[0007] Furthermore, when the multiple iron core blocks are unfolded, the end of the first block facing the third block, the end of the third block away from the first block, and the end of the second block away from the third block are all provided with rotating protrusions; the end of the third block facing the first block and the end of the second block facing the third block are all provided with rotating grooves that cooperate with the rotating protrusions; the end of the first block away from the third block is provided with a fitting groove for the rotating protrusions to be engaged; the central angle of the rotating groove is greater than 180°, and the central angle of the fitting groove is less than 180°.

[0008] Furthermore, the bottom of the first segment is provided with an extension, which together with the bottom of the fitting groove forms a limiting groove, and the central angle of the limiting groove is greater than 180°.

[0009] Furthermore, the first block, the second block, and the third block are each provided with a first contact surface above the pivot connection, and the first block, the second block, and the third block are each provided with a second contact surface below the pivot connection. When multiple iron cores are unfolded into a linear chain structure, two adjacent first contact surfaces are in contact with each other. When multiple iron cores are enclosed in blocks to form a circular chain structure, two adjacent second bonding surfaces are bonded to each other.

[0010] Furthermore, when the multiple core blocks are unfolded, a support portion is provided on the first mating surface where the third block and the second block are attached. The support portion is used to restrict the second block from being completely inserted into the third block.

[0011] Furthermore, when the multiple core blocks are unfolded, the top surfaces of the first block and the multiple third blocks are flush, and the top surface of the second block is higher than the top surfaces of the first block and the third block; when the multiple core blocks are enclosed, the top surfaces of the first block, the second block and the third block are flush.

[0012] Furthermore, each of the aforementioned core blocks is composed of multiple core laminations stacked together.

[0013] The technical solution of the present invention has at least the following advantages and beneficial effects: 1. This invention changes the structure of the core blocks located at the ends, namely the structure of the first block and the second block, so that when the second block and the first block are assembled into a circle, they are first engaged and then pivotally connected, so that the overall structure of the assembled stator core remains in a circular chain structure, and the stability after the circle is formed can be maintained without the need for welding.

[0014] 2. This invention provides a support portion on the third block near the second block. When multiple core blocks are in a straight chain structure, the support portion can prevent the second block from being completely inserted into the third block. When multiple core blocks are arranged into a circle, the second block is no longer restricted by the support portion. At this time, the second block can be pressed down so that the top surfaces of the first, second, and third blocks are all flush. At the same time, the pivot of the second block can pass through the bottom of the fitting groove and enter the limiting groove, thereby limiting the overall structure of the stator core after it is formed into a circle. Attached Figure Description

[0015] Figure 1 This is a top view of the linear chain structure formed when the iron core of the present invention is unfolded into blocks; Figure 2 This is a top view of the circular chain structure formed by the segmented enclosure of the iron core of the present invention; Figure 3 This is a three-dimensional structural diagram of the iron core of the present invention when it is unfolded into blocks; Figure 4 for Figure 3 Enlarged view of part A; Figure 5 This is a schematic diagram of the three-dimensional structure of the iron core after it is divided into blocks and enclosed. Figure 6 for Figure 5 Enlarged view of part B; Figure 7 for Figure 5 Enlarged view of section C; Reference numerals: 1-first segment, 11-extension, 2-second segment, 3-third segment, 31-supporting part, 4-rotating protrusion, 5-rotating groove, 6-fitting groove, 7-limiting groove, 8-first fitting surface, 9-second fitting surface. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] The following is for reference Figures 1-7 As shown in the illustration, and further explained with reference to specific embodiments, this embodiment provides a segmented chain stator core, referring to... Figure 1 , Figure 2 As shown, the stator core comprises multiple core blocks, each composed of stacked core laminations. Adjacent core blocks are detachable and connectable. When unfolded, the core blocks form a linear chain structure; when closed, they form a circular chain structure. Unfolding the core blocks into a linear chain structure facilitates the winding process, and after winding, the linear chain structure can be easily and quickly switched to a circular chain structure to form the final stator core structure.

[0019] Reference Figure 3 As shown, when multiple core blocks are unfolded, the core block at one end is the first block 1, the core block at the other end is the second block 2, and the multiple core blocks between the first block 1 and the second block 2 are all third blocks 3. The third blocks 3 are assembled with the first block 1, the multiple third blocks 3, and the second block 2 and the third blocks 3 along the axis of the enclosed stator core (i.e., assembled sequentially from top to bottom), and are pivotally connected after assembly. When switching the multiple core blocks from a straight-chain structure to a circular-ring chain structure, after rotating the second block 2 and the multiple third blocks 3 by a specified angle, the second block 2 then encloses the first block 1 from the side of the first block 1 away from the third block 3, so that the multiple core blocks together form a ring. The multiple core blocks rotate around their respective pivots by the same angle, and the sum of all the rotation angles of the core blocks is 360°. In this embodiment, there are 12 iron core blocks. Therefore, after the second block 2 and the multiple third blocks 3 each rotate 30° around the pivot, the end of the second block 2 can reach the position of the first block 1, so that the multiple iron core blocks form a ring shape with the ends connected by a straight chain.

[0020] The second segment 2 and the first segment 1 are first assembled along the arc direction of the enclosed stator core, and then assembled along the axial direction of the enclosed stator core. That is, the two are first engaged and then pivoted to keep the overall structure of the assembled stator core in a circular chain structure.

[0021] When multiple core blocks are unfolded, each of the following sections has a rotating protrusion 4: the end of the first block 1 facing the third block 3, the end of the third block 3 away from the first block 1, and the end of the second block 2 away from the third block 3. Each of the following sections also has a rotating groove 5 that mates with the rotating protrusion 4: the end of the third block 3 facing the first block 1, and the end of the second block 2 facing the third block 3. The central angle of the rotating groove 5 is greater than 180°. By inserting the rotating protrusions 4 of each core block from top to bottom into the corresponding rotating grooves 5, a pivotal connection is formed between them after the rotating protrusions 4 are inserted into the rotating grooves 5. This allows for relative rotation within the plane without separation.

[0022] Reference Figure 3 , Figure 4 As shown, the end of the first segment 1 furthest from the third segment 3 is provided with a fitting groove 6 for the rotating protrusion 4 to engage. The central angle of the fitting groove 6 is less than 180°. (Refer to reference...) Figure 5 , Figure 7 As shown, when the second segment 2 moves to the side of the fitting groove 6 of the first segment 1 during the rounding process, the fitting groove 6 allows the rotating protrusion 4 of the second segment 2 to enter and fit against the rotating protrusion 4. The bottom of the first segment 1 is provided with an extension 11, which together with the bottom of the fitting groove 6 forms a limiting groove 7, and the central angle of the limiting groove 7 is greater than 180°. When multiple iron core segments are unfolded into a straight chain structure, the second segment 2 is not completely inserted into the third segment 3 located at the edge, that is, the top surface of the second segment 2 is higher than the top surface of the third segment 3 and the first segment 1; after the rotating protrusion 4 of the second segment 2 fits against the fitting groove 6 of the first segment 1, by pressing the second segment 2 downward, the rotating protrusion 4 passes through the bottom of the fitting groove 6 and enters the limiting groove 7. At this time, the position of the second segment 2 is limited, so the stability after rounding can be maintained without the need for welding during the rounding process.

[0023] Reference Figure 5 , Figure 6 As shown, the first segment 1, the second segment 2, and the third segment 3 are each provided with a first contact surface 8 above the pivot connection, and the first segment 1, the second segment 2, and the third segment 3 are each provided with a second contact surface 9 below the pivot connection. When multiple core segments are unfolded to form a straight chain structure, adjacent first contact surfaces 8 are in contact with each other; when multiple core segments are enclosed to form a circular chain structure, adjacent second contact surfaces 9 are in contact with each other. The provision of first contact surfaces 8 and second contact surfaces 9 ensures high stability for multiple core segments whether forming a straight chain structure or a circular chain structure. It also facilitates the assessment by personnel of the contact state of the first contact surfaces 8 and the second contact surfaces 9 to determine whether the circularity of the stator core structure is acceptable.

[0024] Reference Figure 6 As shown, when multiple core blocks are unfolded, a support portion 31 is provided on the first contact surface 8 where the third block 3 and the second block 2 are attached. The support portion 31 is used to restrict the second block 2 from being completely inserted into the third block 3. Therefore, when multiple core blocks are unfolded, the top surfaces of the first block 1 and the multiple third blocks 3 are all flush, and the top surface of the second block 2 is higher than the top surfaces of the first block 1 and the third block 3. When the multiple core blocks are formed into a circle, since the first contact surface 8 of the second block 2 is separated from the first contact surface 8 of the third block 3, the second block 2 is no longer restricted by the support portion 31. At this time, the second block 2 is pressed down so that the top surfaces of the first block 1, the second block 2 and the third block 3 are all flush. At the same time, since the pivot of the second block 2 can pass through the bottom of the contact groove 6 and enter the limiting groove 7 after being pressed, the overall structure of the stator core after being formed into a circle is also restricted.

[0025] It should be noted that since the first block 1, the second block 2 and the third block 3 are all composed of multiple iron core laminations stacked together, the extension 11 in this embodiment is formed due to the difference in shape between the iron core laminations at the bottom and the top of the first block 1, and the support 31 is formed due to the difference in shape between the iron core laminations at the bottom and the top of the third block 3 near the second block 2.

[0026] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A segmented chain-type stator core, comprising multiple core segments, wherein adjacent core segments can be detachably connected, characterized in that, When the multiple iron cores are unfolded into blocks, they form a straight chain structure; when they are enclosed, they form a circular chain structure. When the multiple core blocks are unfolded, the core block located at one end is the first block (1), the core block located at the other end is the second block (2), and the multiple core blocks located between the first block (1) and the second block (2) are all the third blocks (3). The third block (3) and the first block (1), the multiple third blocks (3), and the second block (2) and the third block (3) are all assembled along the axial direction of the enclosed stator core and can rotate relative to each other; The second block (2) and the first block (1) are first assembled along the arc direction of the enclosed stator core, and then assembled along the axial direction of the enclosed stator core, and the stator core is kept in a circular chain structure after assembly. The third block (3) is pivotally connected to the first block (1), to the multiple third blocks (3), and to the second block (2) and the third block (3). The second block (2) and the first block (1) are first engaged and then pivotally connected.

2. The segmented chain stator core according to claim 1, characterized in that, When the multiple iron core blocks are unfolded, the first block (1) facing the third block (3), the third block (3) away from the first block (1), and the second block (2) away from the third block (3) are all provided with rotating protrusions (4); the third block (3) facing the first block (1) and the second block (2) facing the third block (3) are all provided with rotating grooves (5) that cooperate with the rotating protrusions (4); the first block (1) away from the third block (3) is provided with a fitting groove (6) for the rotating protrusions (4) to be inserted; the central angle of the rotating groove (5) is greater than 180°, and the central angle of the fitting groove (6) is less than 180°.

3. The segmented chain stator core according to claim 2, characterized in that, The bottom of the first block (1) is provided with an extension (11), and the extension (11) and the bottom of the fitting groove (6) together form a limiting groove (7), and the central angle of the limiting groove (7) is greater than 180°.

4. The segmented chain stator core according to claim 2, characterized in that, The first block (1), the second block (2) and the third block (3) are all provided with a first contact surface (8) above the pivot connection part, and the first block (1), the second block (2) and the third block (3) are all provided with a second contact surface (9) below the pivot connection part; When multiple iron cores are unfolded into a straight chain structure, two adjacent first bonding surfaces (8) are bonded to each other; When multiple iron cores are enclosed in blocks to form a circular chain structure, two adjacent second bonding surfaces (9) are bonded to each other.

5. The segmented chain stator core according to claim 4, characterized in that, When the multiple core blocks are unfolded, a support part (31) is provided on the first contact surface (8) where the third block (3) and the second block (2) are attached. The support part (31) is used to restrict the second block (2) from being completely inserted into the third block (3).

6. The segmented chain stator core according to claim 5, characterized in that, When the multiple core blocks are unfolded, the top surfaces of the first block (1) and the multiple third blocks (3) are all flush, and the top surface of the second block (2) is higher than the top surfaces of the first block (1) and the third block (3); when the multiple core blocks are enclosed, the top surfaces of the first block (1), the second block (2) and the third block (3) are all flush.

7. The segmented chain stator core according to claim 1, characterized in that, Each of the aforementioned core blocks is composed of multiple core laminations stacked together.

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