An insulation structure of a stator core of an axial flux disc motor and disc motor

Abstract

This utility model discloses an insulation structure for the stator core of an axial flux disc motor and the disc motor itself. The motor includes a stator core and an insulating frame. The insulating frame comprises several inner tooth insulating frames and several outer tooth insulating frames. Each inner tooth insulating frame includes a left side wall, a right side wall, an inner baffle, an upper baffle, and a bottom baffle. The inner tooth insulating frame is fitted onto the teeth of the stator core, using the teeth as a reference. Each outer tooth insulating frame includes an outer baffle and a snap-fit ​​side wall. The snap-fit ​​side wall has several slots spaced from top to bottom. The outer tooth insulating frame is fitted onto the teeth of the stator core, using the teeth as a reference. Several locking blocks are spaced from top to bottom at the ends of the left and right side walls. These locking blocks are nested with the slots to connect the inner and outer tooth insulating frames, which are fitted around the outer perimeter of the tooth side wall. The snap-fit ​​has a self-locking function, preventing the insulating frame from falling off after installation. Furthermore, since the insulating frame is based on the teeth of the stator core, the tolerance of the winding slots does not affect the mating.

Description

Technical Field

[0001] This utility model relates to the insulation structure of the stator core of an axial flux disc motor and the disc motor. Background Technology

[0002] Existing patent number: CN202421847051, titled: "A utility model patent for a stator core of an axial flux disc motor with an insulating structure and a disc motor," mainly provides an insulating structure for the stator of a disc motor. However, this patented structure has the following shortcomings:

[0003] 1. The axially arranged stator core is formed by lamination winding, and the insulating frame is composed of an inner insulating frame and an outer insulating frame interlocked. Due to the difference in the size of each slot of the stator core, the dimensional tolerance cannot be controlled within a very small range like that of the lamination core of a radial motor. Therefore, in practical applications, there is a probability that the inner insulating frame and the outer insulating frame interlocking structure cannot be interlocked, which is due to the dimensional deviation of the stator core manufacturing, causing interference in the interlocking part.

[0004] 2. The underside of the outer insulation frame lacks a cable clamping structure, and the underside cable or power cable is loose and untidy.

[0005] 3. After the insulating frame is installed on the stator core, the connection between the inner and outer insulating frames is not firm, and the insulating frame may fall off during winding or transportation. Summary of the Invention

[0006] The purpose of this utility model is to provide an insulation structure for the stator core of an axial flux disc motor and a disc motor, solving the technical problems in the prior art where the inner and outer insulating frames cannot be interlocked due to the difference in the size of each slot of the stator core, and the connection is not firm after interlocking, leading to detachment.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] An insulation structure for the stator core of an axial flux disc motor includes a stator core and an insulating frame. The stator core includes an annular yoke and a plurality of teeth protruding axially from the top surface of the annular yoke. The plurality of teeth are evenly distributed circumferentially, and a winding groove is formed between two adjacent teeth. An axial opening is provided at the top of the winding groove. The insulating frame comprises a plurality of inner tooth insulating frames and a plurality of outer tooth insulating frames, wherein:

[0009] Each internal tooth insulation frame includes a left side wall, a right side wall, an inner baffle, an upper baffle, and a bottom baffle. One end of the left side wall and one end of the right side wall are connected to both sides of the inner baffle to form a V-shaped layout. The upper baffle and the bottom baffle are located at the top and bottom of the left side wall, the right side wall, and the inner baffle, respectively. The internal tooth insulation frame is fitted onto the teeth of the stator core based on the teeth. The left side wall and the right side wall are attached to the two side walls of the teeth, respectively. The upper baffle and the bottom baffle are embedded into the bottom and top of the winding groove. The inner baffle is attached to the inner side wall of the teeth.

[0010] Each external tooth insulation frame includes an outer baffle and a snap-fit ​​sidewall protruding inward from both sides of the outer baffle. The snap-fit ​​sidewall is provided with several slots at intervals from top to bottom. The external tooth insulation frame is fitted onto the tooth of the stator core based on the tooth. The outer baffle is attached to the outer sidewall of the tooth. The snap-fit ​​sidewalls on both sides extend into the winding groove and are attached to the two sidewalls of the tooth respectively. Several locking blocks are provided at intervals from top to bottom at the ends of the left and right sidewalls. Several locking blocks are nested and snapped into several slots, so that the internal tooth insulation frame is connected to the external tooth insulation frame and fitted around the sidewall of the tooth.

[0011] Preferably, the ends of the left and right side walls are provided with recessed steps, and several locking blocks are set on the steps, with the steps nested inside the snap-fit ​​side walls.

[0012] Preferably, a first inclined surface is provided on the end of the buckle sidewall, and a guide inclined surface is provided on the buckle block. When the buckle sidewall is engaged with the left or right sidewall, the first inclined surface and the guide inclined surface play a guiding role, making it convenient to insert the buckle.

[0013] Preferably, a second baffle is provided at the top and bottom of the snap-fit ​​sidewall, and the second baffle is covered by an upper baffle or a bottom baffle.

[0014] Preferably, a yoke insulating plate is provided below the outer baffle, the yoke insulating plate is attached to the outer side of the annular yoke, and a first wire guide groove and a second wire guide groove are provided on the yoke insulating plate from top to bottom, and a plurality of wire guide baffles and a plurality of wire hooks are provided on the first wire guide groove and the second wire guide groove.

[0015] Preferably, a disc motor includes a stator assembly and a rotor assembly, characterized in that: the stator assembly adopts the insulation structure of the stator core of an axial flux disc motor described above.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] Effect 1: This utility model adopts a structure of interlocking buckles between an inner toothed insulating frame and an outer toothed insulating frame. The buckles have a self-locking function, and the insulating frame will not fall off after installation.

[0018] Effect 2: This utility model adopts a structure of interlocking snap-fit ​​between an inner toothed insulating frame and an outer toothed insulating frame. Each outer toothed insulating frame includes an outer baffle and a snap-fit ​​sidewall protruding inward from both sides of the outer baffle. The snap-fit ​​sidewall is provided with several slots at intervals from top to bottom. The outer toothed insulating frame is fitted onto the teeth of the stator core based on the teeth. The outer baffle is attached to the outer sidewall of the teeth. The snap-fit ​​sidewalls on both sides extend into the winding groove and are respectively attached to the two sidewalls of the teeth. Several locking blocks are provided at intervals from top to bottom at the ends of the left and right sidewalls. Several locking blocks are nested with several slots to snap-fit, so that the inner toothed insulating frame and the outer toothed insulating frame are connected and fitted around the sidewall of the teeth. With this snap-fit ​​structure, even if there is a tolerance in the winding groove, since the insulating frame of this utility model is fitted onto the teeth based on the teeth of the stator core, the size of the tolerance of the winding groove does not affect the interlocking of the inner toothed insulating frame and the outer toothed insulating frame. The interlocking snap-fit ​​structure can cleverly avoid the interlocking interference phenomenon.

[0019] Other advantages of this invention will be explained in more detail in the embodiments described in the specification. Attached Figure Description

[0020] Figure 1 This is a perspective view of the insulation structure of a stator core according to an embodiment of the present invention;

[0021] Figure 2 This is an exploded view of the insulation structure of a stator core according to an embodiment of this utility model;

[0022] Figure 3 This is a partially exploded view of the insulation structure of a stator core according to an embodiment of the present invention;

[0023] Figure 4 This is a front view of the insulation structure of a stator core according to an embodiment of this utility model;

[0024] Figure 5 yes Figure 4 AA section view;

[0025] Figure 6 yes Figure 5 A magnified view of part C in the middle;

[0026] Figure 7 yes Figure 4 BB cross-sectional view;

[0027] Figure 8 yes Figure 7 A magnified view of part D in the middle;

[0028] Figure 9 yes Figure 8 A magnified view of part E in the middle;

[0029] Figure 10This is a perspective view of one of the edge frames of Embodiment 1 of this utility model from one angle;

[0030] Figure 11 This is a perspective view of one edge frame of Embodiment 1 of this utility model from another angle;

[0031] Figure 12 This is an exploded view of one angle of the frame of one embodiment of the present invention;

[0032] Figure 13 This is an exploded view of one edge frame of Embodiment 1 of this utility model from another angle. Detailed Implementation

[0033] The present invention will now be described in further detail through specific embodiments and in conjunction with the accompanying drawings.

[0034] Example 1:

[0035] like Figures 1 to 13 As shown, this embodiment provides an insulation structure for the stator core of an axial flux disc motor, including a stator core 1 and an insulating frame 2. The stator core 1 includes an annular yoke 11 and a plurality of teeth 12 protruding axially from the top surface of the annular yoke 11. The plurality of teeth 12 are evenly distributed circumferentially, and a winding groove 13 is formed between two adjacent teeth 12. An axial opening 131 is provided at the top of the winding groove 13. The insulating frame 2 includes a plurality of inner tooth insulating frames 21 and a plurality of outer tooth insulating frames 22, wherein:

[0036] Each internal tooth insulation frame 21 includes a left side wall 211, a right side wall 212, an inner baffle 213, an upper baffle 214, and a bottom baffle 215. One end of the left side wall 211 and one end of the right side wall 212 are respectively connected to the two sides of the inner baffle 213 to form a V-shaped layout. The upper baffle 214 and the bottom baffle 215 are located at the top and bottom of the left side wall 211, the right side wall 212, and the inner baffle 213, respectively. The internal tooth insulation frame 21 is fitted onto the tooth 12 of the stator core 1 with the tooth 12 as a reference. The left side wall 211 and the right side wall 212 are respectively attached to the two side walls of the tooth 12. The upper baffle 214 and the bottom baffle 215 are embedded into the bottom and top of the winding groove 13. The inner baffle 213 is attached to the inner side wall of the tooth 12.

[0037] Each outer tooth insulation frame 22 includes an outer baffle 221 and a snap-fit ​​sidewall 222 protruding inward from both sides of the outer baffle 221. The snap-fit ​​sidewall 222 is provided with a number of slots 223 at intervals from top to bottom. The outer tooth insulation frame 22 is fitted onto the tooth 12 of the stator core 1 with the tooth 12 as the reference. The outer baffle 221 is attached to the outer sidewall of the tooth 12. The snap-fit ​​sidewalls 222 on both sides extend into the winding groove 13 and are attached to the two sidewalls of the tooth 12 respectively. The ends of the left sidewall 211 and the right sidewall 212 are provided with a number of snap-fit ​​blocks 210 at intervals from top to bottom. The number of snap-fit ​​blocks 210 are nested and snapped with the number of slots 223 respectively, so that the inner tooth insulation frame 21 and the outer tooth insulation frame 22 are connected and fitted around the sidewall of the tooth 12.

[0038] Advantages of this utility model: 1. Effect 1: This utility model adopts a structure of interlocking buckles between an inner toothed insulating frame and an outer toothed insulating frame. The buckles have a self-locking function, preventing the insulating frame from falling off after installation. 2. This utility model adopts a structure of interlocking buckles between an inner toothed insulating frame and an outer toothed insulating frame. Both the inner and outer toothed insulating frames are fitted onto the teeth of the stator core as a reference. Even if there are tolerances in the wiring groove, because the insulating frame of this utility model is fitted onto the teeth of the stator core as a reference, the tolerance of the wiring groove does not affect the interlocking of the inner and outer toothed insulating frames. The interlocking buckle structure cleverly avoids interference during interlocking.

[0039] Preferably, the ends of the left side wall 211 and the right side wall 212 are provided with recessed steps 220, and a number of locking blocks 210 are provided on the steps 220. The steps 220 are nested inside the locking side wall 222 for easy insertion and nesting.

[0040] Preferably, a first inclined surface 2221 is provided on the end of the buckle sidewall 222, and a guide inclined surface 2101 is provided on the buckle block 210. When the buckle sidewall 222 is engaged with the left sidewall 211 or the right sidewall 212, the first inclined surface 2221 and the guide inclined surface 2101 play a guiding role, which facilitates the insertion of the buckle.

[0041] Preferably, a second baffle 224 is provided at the top and bottom of the snap-fit ​​sidewall 222, and the second baffle 224 is blocked by the upper baffle 214 or the bottom baffle 215, which helps to improve insulation.

[0042] Preferably, a yoke insulating plate 225 is provided below the outer baffle 221. The yoke insulating plate 225 is attached to the outer side of the annular yoke 11. A first wire-passing groove 227 and a second wire-passing groove 228 are provided on the yoke insulating plate 225 from top to bottom. Several wire-passing baffles 229 and several wire hooks 230 are provided on the first wire-passing groove 227 and the second wire-passing groove 228. The outer toothed insulating frame 22 is designed with two layers of wire grooves, namely the first wire-passing groove 227 and the second wire-passing groove 228. The first wire-passing groove 227 is a bridging wire groove used to pass through and isolate bridging wires during winding. The second wire-passing groove 228, several wire-passing baffles 229, and several wire hooks 230 are used for routing the power lines after the three-phase power lines are connected to the windings. The wire hooks 230 secure the power lines with clips. This facilitates production, eliminating the need for cable ties or binding wires to secure the power lines, thus improving production efficiency.

[0043] Example 2:

[0044] A disc motor includes a stator assembly and a rotor assembly, characterized in that: the stator assembly adopts the insulation structure of the stator core of an axial flux disc motor as described in Embodiment 1.

[0045] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. An insulating structure for a stator core of an axial flux disk motor, comprising a stator core (1) and an insulating frame (2), wherein the stator core (1) comprises an annular yoke (11) and a plurality of teeth (12) protruding axially from the top surface of the annular yoke (11), the plurality of teeth (12) being evenly distributed circumferentially, and a winding groove (13) being formed between two adjacent teeth (12), wherein an axial opening (131) is provided at the top of the winding groove (13), characterized in that: The insulating frame (2) includes several internal toothed insulating frames (21) and several external toothed insulating frames (22), wherein: Each internal tooth insulation frame (21) includes a left side wall (211), a right side wall (212), an inner baffle (213), an upper baffle (214), and a bottom baffle (215). One end of the left side wall (211) and one end of the right side wall (212) are respectively connected to both sides of the inner baffle (213) to form a V-shaped layout. The upper baffle (214) and the bottom baffle (215) are located at the top and bottom of the left side wall (211), the right side wall (212), and the inner baffle (213), respectively. The inner tooth insulation skeleton (21) is fitted onto the tooth (12) of the stator core (1) based on the tooth (12). The left side wall (211) and the right side wall (212) are attached to the two side walls of the tooth (12), respectively. The upper baffle (214) and the bottom baffle (215) are embedded into the bottom and top of the wire groove (13). The inner baffle (213) is attached to the inner side wall of the tooth (12). Each external tooth insulation frame (22) includes an outer baffle (221) and a snap-fit ​​sidewall (222) protruding inward from both sides of the outer baffle (221). The snap-fit ​​sidewall (222) is provided with several slots (223) at intervals from top to bottom. The external tooth insulation frame (22) is fitted onto the tooth (12) of the stator core (1) with the tooth (12) as the reference. The outer baffle (221) is attached to the outer side wall of the tooth (12). The snap-fit ​​sidewalls (222) on both sides extend into the winding groove (13) and are attached to the two side walls of the tooth (12) respectively. Several snap blocks (210) are provided at intervals from top to bottom at the ends of the left side wall (211) and the right side wall (212). Several snap blocks (210) are nested and snapped with several slots (223) respectively, so that the internal tooth insulation frame (21) and the external tooth insulation frame (22) are connected and fitted around the side wall of the tooth (12).

2. The insulation structure of the stator core of an axial flux disk motor according to claim 1, characterized in that: The ends of the left side wall (211) and the right side wall (212) are provided with recessed steps (220), and several locking blocks (210) are set on the steps (220). The steps (220) are nested inside the locking side wall (222).

3. The insulation structure of the stator core of an axial flux disk motor according to claim 2, characterized in that: A first inclined surface (2221) is provided on the end of the buckle sidewall (222), and a guide inclined surface (2101) is provided on the buckle block (210). When the buckle sidewall (222) is fastened with the left sidewall (211) or the right sidewall (212), the first inclined surface (2221) and the guide inclined surface (2101) play a guiding role, which facilitates the insertion of the buckle.

4. The insulation structure of the stator core of an axial flux disc motor according to claim 1, 2, or 3, characterized in that: The top and bottom of the snap-on sidewall (222) are respectively provided with a second baffle (224), which is covered by an upper baffle (214) or a bottom baffle (215).

5. The insulation structure of the stator core of an axial flux disc motor according to claim 1, 2, or 3, characterized in that: A yoke insulating plate (225) is provided below the outer baffle (221). The yoke insulating plate (225) is attached to the outer side of the annular yoke (11). A first wire passage groove (227) and a second wire passage groove (228) are provided on the yoke insulating plate (225) from top to bottom. Several wire passage baffles (229) and several wire hooks (230) are provided on the first wire passage groove (227) and the second wire passage groove (228).

6. A disc motor, comprising a stator assembly and a rotor assembly, characterized in that: The stator assembly adopts the insulation structure of the stator core of an axial flux disk motor as described in any one of claims 1 to 5.

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