Winding assembly of motor and motor

Abstract

The embodiment of the utility model provides a winding assembly of a motor and the motor, and the winding assembly comprises a first magnetic conductive part which comprises a winding part, the winding part comprises a first bearing beam, a first yoke part and a second yoke part, and the first yoke part and the second yoke part are respectively arranged at the two ends of the first bearing beam; the winding wire is used for being wound on the first bearing beam and limited between the first yoke part and the second yoke part; wherein the cross section of the winding wire is flat, and the winding wire comprises a wide edge and a narrow edge; the winding wire is wound on the first bearing beam to form a plurality of winding layers, the winding wire on the winding part comprises a torsion part, and the torsion part is located at the winding initial position of the bottommost winding layer on the first bearing beam; a first line segment of the torsion part is an initial segment in the line inlet direction, a second line segment of the torsion part is connected with the first line segment through a transition segment, the narrow edge of the first line segment faces the first bearing beam, and the wide edge of the second line segment of the torsion part faces the first bearing beam. According to the embodiment of the invention, the slot fullness rate can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic drive devices, and in particular to a winding assembly of a motor and a motor. Background Art

[0002] The motor includes a stator and a rotor, and the enameled wire is wound around the stator core or the rotor core to form a coil winding.

[0003] The coil winding is usually a multi-layer structure. At the wire entry position on the iron core, the enameled wire can only be wound once due to interference from the wire entry end, resulting in a low slot fill rate of the iron core. Utility Model Content

[0004] In order to solve the problem of low slot fill rate in existing motors, the present application provides a motor winding assembly and a motor.

[0005] An embodiment of the present application provides a winding assembly of a motor, the winding assembly comprising:

[0006] A first magnetic conductive member includes a winding portion, wherein the winding portion includes a first load beam, a first yoke portion, and a second yoke portion, wherein the first yoke portion and the second yoke portion are respectively provided at two ends of the first load beam; and

[0007] A winding wire, used for winding around the first load-bearing beam of the winding portion and limited between the first yoke portion and the second yoke portion;

[0008] The cross section of the winding in the width direction is flat, and the winding includes a wide side in the width direction and a narrow side in the thickness direction;

[0009] The winding wire is wound on the first load beam to form multiple winding layers, the winding wire on the winding portion includes a torsion portion, and the torsion portion is located at a winding starting position of the bottom winding layer on the first load beam;

[0010] The torsion portion includes a first line segment, a transition segment and a second line segment. The first line segment is the initial segment of the torsion portion in the line entry direction. The second line segment is connected to the first line segment through the transition segment. The narrow side of the first line segment is arranged facing the first load-bearing beam, and the wide side of the second line segment is arranged facing the first load-bearing beam.

[0011] The embodiment of the present application further provides a motor, the motor comprising the winding assembly of the aforementioned embodiment; and

[0012] The magnetic assembly is magnetically coupled to the winding assembly so that the winding assembly and the magnetic assembly rotate relative to each other.

[0013] The winding assembly of the embodiment of the present invention can avoid the starting end of the winding from interfering with the winding layer formed by subsequent winding by twisting the winding at the starting position of the winding wire in the winding part and then winding it, and can increase the arrangement density of the winding in the slot-shaped space of the winding part and improve the slot fill rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram schematically shows a partial structure of a motor according to an embodiment of the present utility model;

[0015] Figure 2 The following schematically shows an assembly diagram of a winding assembly according to an embodiment of the present invention;

[0016] Figure 3 A schematic diagram of a winding twisting portion of an embodiment of the present utility model is schematically shown;

[0017] Figure 4 A schematic cross-sectional view of a winding according to an embodiment of the present invention is shown schematically;

[0018] Figure 5 The following schematically shows the arrangement of the winding wires in the winding slots according to the embodiment of the present invention;

[0019] Figure 6 A schematic diagram showing two winding parts sharing one winding wire in an embodiment of the present utility model is shown;

[0020] Figure 7 The following schematically shows an insulation structure in a winding slot according to an embodiment of the present invention;

[0021] Figure 8 Schematically shows an embodiment of the present invention Figure 1 A locally enlarged schematic diagram of the I position.

[0022] Reference numerals:

[0023] First magnetic conductive part-10, winding part-101, first load-bearing beam-101a, first yoke part-101b, second yoke part-101c, winding groove 102, large end 102a, small end-102b, protruding structure-1011, recessed structure-1012, winding-20, wide side-20a, narrow side-20b, torsion part-201, first line segment-201a, transition segment-201b, second line segment-201c, effective side-21, first effective side-21a, second effective side-21b, preset gap-22, fixture-30, thin film layer-40, second magnetic conductive part-50, second load-bearing beam-501a, third yoke part-501b, fourth yoke part-501c, auxiliary groove-60. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0025] Reference Figures 1 to 4 , an embodiment of the present application provides a winding assembly of a motor, the winding assembly comprising:

[0026] The first magnetic conductive member 10 includes a winding portion 101, wherein the winding portion 101 includes a first load beam 101a, a first yoke portion 101b, and a second yoke portion 101c. The first yoke portion 101b and the second yoke portion 101c are respectively provided at two ends of the first load beam 101a; and

[0027] The winding 20 is used to be wound around the first load beam 101a of the winding portion 101 and is limited between the first yoke 101b and the second yoke 101c;

[0028] The cross section of the winding 20 in the width direction is flat, and the winding 20 includes a wide side 20a in the width direction and a narrow side 20b in the thickness direction;

[0029] The winding wire 20 is wound on the first load beam 101a to form multiple winding layers. The winding wire 20 on the winding portion 101 includes a torsion portion 201. The torsion portion 201 is located at the winding starting position of the bottom winding layer on the first load beam 101a.

[0030] The torsion portion 201 includes a first line segment 201a, a transition segment 201b and a second line segment 201c. The first line segment 201a is the initial segment of the torsion portion 201 in the line entry direction. The second line segment 201c is connected to the first line segment 201a through the transition segment 201b. The narrow side of the first line segment 201a is arranged facing the first load-bearing beam 101a, and the wide side of the second line segment 201c is arranged facing the first load-bearing beam 101a.

[0031] like Figure 1 As shown, the winding assembly of the embodiment of the present invention is a part of the electromagnetic structure of the motor. The winding assembly can refer to a stator assembly or a rotor assembly, and specifically can include a first magnetic conductive member 10 and a winding 20 wound around the first magnetic conductive member 10 to form a winding. To facilitate understanding of the product structure of the embodiment of the present invention, the following embodiment is described using the winding assembly as a stator assembly as an example.

[0032] The first magnetic conductive member 10 of the embodiment of the present invention is one of the multiple stator cores forming the stator assembly. Figure 2As shown in the figure, the first magnetic conductive member 10 includes a winding portion 101, which includes a first load beam 101a, a first yoke 101b, and a second yoke 101c. The first yoke 101b and the second yoke 101c are respectively provided at the two ends of the first load beam 101a. The first load beam 101a, the first yoke 101b, and the second yoke 101c are connected to form an I-shaped first magnetic conductive member 10. The winding wire 20 used to form the winding is wound in the slot-shaped space formed between the first yoke 101b and the second yoke 101c.

[0033] like Figure 3 As shown, the winding 20 can be an enameled wire with an insulating layer. The cross section of the winding 20 in the embodiment of the present invention can be flat, such as Figure 4 FIG2 is a schematic diagram of a cross-section of a winding 20 according to an embodiment of the present invention. It should be noted that the cross-section of the winding 20 can be a rectangle as shown, or a rectangle with rounded corners. The flat winding 20 according to the embodiment of the present invention includes a wide side 20a in the width direction X and a narrow side 20b in the thickness direction Y.

[0034] It is easy to understand that when the winding 20 is wound on the first load-bearing beam 101a to form multiple winding layers, the intersection of the first load-bearing beam 101a and the first yoke 101b, or the intersection of the first load-bearing beam 101a and the second yoke 101c can be used as the starting position for winding the wire. The winding 20 is spirally wound on the first load-bearing beam 101a from this position, forming the first winding layer, the second winding layer, the third winding layer... the Nth winding layer from the bottom layer to the top layer in sequence, with the first winding layer being pressed at the bottom and the Nth winding layer exposed at the top.

[0035] like Figure 2 and Figure 3 As shown, in the winding assembly of the embodiment of the present invention, when the winding 20 is wound on the winding part 101 to form the winding, at the starting position of the winding, the winding 20 is twisted by a certain angle with the length direction of the winding 20 as the axis to form the twisting part 201.

[0036] Combine Figure 2 As shown in the figure, the winding 20 enters and is wound around the winding portion 101 along the M direction shown in the figure. The torsion portion 201 includes a first line segment 201a, a transition segment 201b and a second line segment 201c. The first line segment 201a is the initial segment of the torsion portion 201 in the wire entry direction M. At least a portion of the first line segment 201a can extend out of the winding portion 101. The second line segment 201c is connected to the first line segment 201a through the transition segment 201b. The second line segment 201c is located as a whole inside the winding portion 101, that is, in the groove-shaped space formed between the first yoke 101b and the second yoke 101c.

[0037] Combine Figures 2 to 4 As shown in the figure, after the winding 20 is twisted, the narrow side 20b of the first line segment 201a faces the first load-bearing beam 101a, and the wide side of the second line segment 201c faces the first load-bearing beam 101a. It should be noted that since the first line segment 201a is closer to the outside of the winding portion 101 and the second line segment 201c is completely located inside the winding portion 101, the narrow side 20b of the first line segment 201a faces the first load-bearing beam 101a. The narrow side 20b of the first line segment 201a can be parallel to the first load-bearing beam 101a, or it can form a small angle with the first load-bearing beam 101a. The wide side of the second line segment 201c faces the first load-bearing beam 101a. The wide side 20a of the second line segment 201c can be parallel to the first load-bearing beam 101a to ensure that the two can be tightly attached to each other and reduce the gap.

[0038] In combination with the above description of the embodiment of the present invention, at the starting position of the winding of the winding portion 101, the winding 20 is twisted before being wound. After the first winding layer is wound, when the winding 20 returns to the starting position, in the W direction where the coils are tightly wound and arranged, the first wire segment 201a of the twisting portion 201 can free up a portion of the routing space to avoid interference and obstruction to the winding 20. It can be understood that in some embodiments, the width of the space freed up at the starting position is approximately the size of the wide side 20a minus the size of the narrow side 20b. In addition, in order to route the wire more smoothly, the first wire segment 201a can also be bent away from the W direction at the starting position to form a more sufficient avoidance space to facilitate the winding of the second winding layer, the third winding layer...the Nth winding layer.

[0039] Therefore, the winding assembly of the embodiment of the present invention can avoid the starting end of the winding 20 from interfering with the winding layer formed by subsequent winding by twisting the winding 20 at the starting position of the winding wire of the winding part 101 and then winding it, and can increase the arrangement density of the winding 20 in the slot-shaped space of the winding part 101 and improve the slot fill rate.

[0040] Optionally, refer to Figure 2 and Figure 4 The torsion portion 201 is arranged close to the first yoke 101b, and each of the windings 20 includes an upper surface 20A and a lower surface 20B located in the wide side direction. The lower surface 20B of the first line segment 201a is arranged facing the side where the first yoke 101b is located, and the lower surface 20B of the second line segment 201c is arranged toward the first load-bearing beam 101a.

[0041] Specifically, if Figure 2As shown in FIG. 1 , the winding 20 starts from a position close to the first yoke 101b and moves toward the second yoke 101c to form the first winding layer. At this time, the torsion portion 201 is set close to the first yoke 101b, combined with Figure 2 and Figure 4 As shown in the figure, the lower surface 20B of the first line segment 201a is arranged to face the side where the first yoke 101b is located, that is, the wider side of the first line segment 201a faces the first yoke 101b, and at the same time, the wider lower surface 20B of the second line segment 201c faces the first load-bearing beam 101a, that is, the lower surface 20B of the second line segment 201c faces the bottom of the groove-shaped space on the first load-bearing beam 101a.

[0042] Thus, in the process of winding the winding 20 from the first yoke 101b to the second yoke 101c to form the first winding layer, the dense arrangement of the first winding layer can be ensured, and the first winding layer can be ensured to be unobstructed after being wound to a position close to the first yoke 101b.

[0043] Optionally, refer to Figure 2 and Figure 4 Each of the windings 20 includes two side surfaces located in the narrow side direction, the side surface closest to the first yoke 101a of the two side surfaces abuts against the first yoke 101b, and the lower surface of the first line segment 201a abuts against the first yoke 101b.

[0044] Specifically, if Figure 2 and Figure 4 As shown, in the embodiment of the present invention, each winding 20 includes two side surfaces in the narrow side direction, and the area of ​​these two side surfaces is smaller than the area of ​​the upper surface 20A and the lower surface 20B in the wide side direction. For the torsion portion 201 of the winding 20, since the lower surface of the first line segment 201a faces the first yoke 101b, at this time, when the winding is routed and wound, the winding 20 can be pressed tightly so that the lower surface of the first line segment 201a abuts the first yoke 101b to eliminate the gap between the two. At the same time, for other parts of the winding 20, the narrower side surfaces can be abutted against the first yoke 101b. In this way, the winding 20 can be densely wound and filled on the winding portion 101.

[0045] Optionally, a torsion angle of the first line segment 201a relative to the second line segment 201c is greater than or equal to 60 degrees and less than or equal to 120 degrees.

[0046] Specifically, in the embodiment of the present invention, the transition section 201b is located between the first line segment 201a and the second line segment 201c, and is the transition portion where the first line segment 201a is twisted and deformed relative to the second line segment 201c. The long axis of the cross section of the first line segment 201a is used as the first reference line, and the long axis of the cross section of the second line segment 201c is used as the second reference line. The angle between the two reference lines is the torsion angle of the corresponding two line segments. Figure 4 The X direction is shown parallel to the axis.

[0047] It should be noted that when the twisting angle is small, it is difficult to provide sufficient space for the second winding layer at the starting position of the winding 20. When the twisting angle is too large, the winding 20 is prone to breakage due to excessive deformation. Therefore, in the embodiment of the present invention, the twisting angle of the first segment 201a relative to the second segment 201c can be any parameter between 60° and 120°, for example, 60°, 70°, 80°, 90°, 100°, 110°, or 120°.

[0048] In some other implementations, designing the twisted deformation structure of the transition section 201b into a suitable shape so that the twisting angle between the first line segment 201a and the second line segment 201c is 90° is also one of the implementation schemes of the present invention.

[0049] Optionally, refer to Figure 1 and Figure 5 The winding assembly 10 includes a plurality of winding portions 101 arranged in a surrounding manner. The opposite sides of each winding portion 101 form corresponding winding grooves 102 together with two adjacent winding portions 101. The size of each winding groove 102 gradually changes in the depth direction R thereof to form a larger large end 102a and a smaller small end 102b.

[0050] The winding 20 includes a plurality of windings, each of the windings 20 being wound around at least one of the winding portions 101. The winding group on each of the winding portions 101 includes two effective side portions 21 arranged opposite to each other. The two effective side portions 21 of the winding group on each of the winding portions 101 are respectively accommodated in the winding grooves 102 on both sides of each of the winding portions 101. The multiple turns of the coils in each winding layer of each of the effective side portions 21 are arranged sequentially along the depth direction R of the winding grooves 102.

[0051] Among them, a preset gap 22 is provided between the winding 20 closest to the small head end 102b in the outermost winding layer of one of the two effective sides 21 in each winding groove 102 and the adjacent winding 20, and the winding 20 closest to the small head end 102b in the outermost winding layer of the other effective side 21 is arranged opposite to the preset gap 22 and is at least partially accommodated in the preset gap 22.

[0052] Specifically, if Figure 1 and Figure 5 As shown, the winding assembly 10 includes a plurality of winding parts 101 arranged in a circumferential manner. Along the circumferential direction, two adjacent winding parts 101 form a winding groove 102. Half of the space of the winding groove 102 is surrounded by the first load-bearing beam 101a, the first yoke 101b, and the second yoke 101c of one of the winding parts 101, and the other half of the space of the winding groove 102 is surrounded by the first load-bearing beam 101a, the first yoke 101b, and the second yoke 101c of the other winding part 101.

[0053] Combine Figure 1 As shown in the figure, the first yoke 101b is farther from the rotation center of the motor, and the second yoke 101c is closer to the rotation center of the motor. Therefore, the end of the winding groove 102 away from the rotation center of the motor is the big head end 102a, and the end of the winding groove 102 close to the rotation center of the motor is the small head end 102b.

[0054] The winding assembly 10 may include multiple windings 20, each winding 20 being wound around at least one winding portion 101. Alternatively, a single winding 20 may be wound sequentially around two or more winding portions 101. It is readily understood that as the number of layers of windings 20 within the winding slot 102 increases, and as the windings 20 are closer to the small end 102b, the remaining space within the winding slot 102 is narrow, and windings on adjacent winding portions 101 are more likely to interfere with or collide with each other, resulting in low slot space utilization.

[0055] Therefore, in the embodiment of the present utility model, the Figure 5 In the schematic diagram of the wiring and winding structure, the winding group on each winding section 101 includes two oppositely arranged effective edges 21. The effective edge 21 is the portion of the winding 20 located within the groove-shaped space of the winding section 101. The two effective edges 21 are relatively distributed on both sides of the corresponding first load-bearing beam 101a. The simplified diagram in the figure only shows one effective edge 21 on a single side. For the winding groove 102, the two effective edges 21 located within the winding groove 102 are: one for the effective edge 21 corresponding to the winding group on the left winding section 101, and the other for the effective edge 21 corresponding to the winding group on the right winding section 101.

[0056] Combine Figure 5As shown in the figure, the winding 20 starts from the position close to the first yoke 101b, and the multiple turns of the coil are arranged along the depth direction R of the winding groove 102. Each winding layer is arranged according to this rule. Along the circumferential direction D surrounded by the multiple winding parts 101, the multiple winding layers on each winding part 101 are stacked together. Figure 5 As shown in FIG. 1 , in the winding slot 102, a preset gap 22 is provided between the winding 20 closest to the small end 102b in the outermost winding layer of the effective side 21 on the right winding portion 101 and the adjacent winding 20. The winding 20 closest to the small end 102b in the outermost winding layer of the other effective side 21 is arranged opposite the preset gap 22 and can be at least partially embedded in the preset gap 22. Therefore, this wiring structure of inserting gaps and filling gaps can at least allow one more turn of coil to be wound in the winding slot 102, further improving the slot fill rate.

[0057] Optionally, refer to Figure 5 The two effective sides 21 of the winding group on each winding portion 101 are respectively a first effective side 21a and a second effective side 21b. The first effective side 21a on each winding portion 101 is provided with the preset gap 22. The first effective side 21a on each winding portion 101 and the second effective side 21b on the adjacent winding portion 101 are accommodated in the same winding groove 102.

[0058] Specifically, if Figure 5 As shown, a first effective side portion 21a and a second effective side portion 21b are respectively distributed on the left and right sides of the same winding portion 101. Figure 5 The simplified schematic diagram shows the first effective edge 21a on the left side of the right winding part 101, and the second effective edge 21b on the right side of the left winding part 101. The first effective edge 21a and the second effective edge 21b are both located in the winding groove 102 formed by the left winding part 101 and the right winding part 101.

[0059] Combine Figure 5 As shown in FIG. 1 , when the winding 20 is wound around each winding portion 101, a preset gap 22 is provided on the first effective edge 21a of each winding portion 101. Simultaneously, a portion of the winding 20 on the second effective edge 21b located within the same winding slot 102 is embedded and accommodated within the corresponding preset gap 22. Thus, for the entire annular first magnetic conductive member 10, the slot fill rate at different positions can be improved.

[0060] Optionally, refer to Figure 5The winding 20 closest to the small end 102b in the outermost winding layer of each effective side 21 on each winding part 101 is the end coil in the wire-out direction.

[0061] Specifically, if Figure 5 As shown, for the winding section 101 on the left, the winding wire 20 can be wound into the winding section 101 at the large end 102a near the first yoke 101b, and after being wound around the first load beam 101a for several turns to form multiple winding layers, it can be wound out from the winding section closest to the small end 102b. This winding out position is the end coil of the winding on the corresponding winding section 101. The same is true for the winding section 101 on the right or other winding sections 101 in other locations not shown, and will not be further described here.

[0062] Optionally, refer to Figure 2 and Figure 5 The torsion portion 201 is located at the large end 102a of the winding groove 102 .

[0063] Specifically, if Figure 2 and Figure 5 As shown, each winding wire 20 can be wound into the large end 102 a of the winding slot 102 when forming a winding, so that the large end 102 a can provide sufficient accommodating space for the torsion portion 201 .

[0064] Optionally, refer to Figure 6 The winding assembly includes a plurality of winding parts 101 arranged in a surrounding manner, and each winding wire 20 is wound on at least two of the winding parts 101.

[0065] Specifically, in the embodiment of the present invention, using one winding wire 20 to be wound around two or more different winding parts 101 can reduce the welding and wiring processes between different windings, which helps to improve the assembly and connection efficiency of the winding assembly. Figure 6 A simplified diagram showing a winding wire 20 being wound around two winding parts 101 at the same time is shown. Figure 6 During the winding process, two adjacent winding parts 101 can be pre-installed and fixed on the fixture 30 for winding. After a winding wire 20 is wound on one winding part 101, it is then wound on the other winding part 101. After the winding is completed, the two winding parts 101 are removed from the fixture 30 and assembled in a circular arrangement.

[0066] Optionally, refer to Figure 1 The winding assembly includes a plurality of winding parts 101 arranged in a surrounding manner, and each winding part 101 is detachably connected to the adjacent winding part 101 to form a ring structure.

[0067] Specifically, if Figure 1 As shown, in the embodiment of the present invention, the plurality of winding sections 101 arranged in a circular array can be independent modular parts. Each winding section 101 can be detachably connected to an adjacent winding section 101, and after splicing and assembling, the entire assembly can form an annular first magnetic conductive member 10. This modular and detachable first magnetic conductive member 10 can reduce the difficulty of winding and improve winding efficiency.

[0068] Optionally, refer to Figure 5 Each of the winding parts 101 is detachably connected to the adjacent winding parts 101 through a snap-fit ​​structure.

[0069] Specifically, if Figure 5 As shown, in the embodiment of the present invention, two adjacent winding parts 101 are clamped together by a clamping structure to form a restraining and limiting effect to maintain the stability of the ring structure.

[0070] Optionally, refer to Figure 5 A protruding structure 1011 is provided on one side of each winding portion 101, and a recessed structure 1012 is provided on the other opposite side. The protruding structure 1011 of each winding portion 101 is engaged with the recessed structure 1012 of the adjacent winding portion 101 on one side, and the recessed structure 1012 of each winding portion 101 is engaged with the protruding structure 1012 of the adjacent winding portion 101 on the other side.

[0071] Specifically, if Figure 5 As shown, each winding portion 101 can be a part with the same shape and structure, with a protruding structure 1011 processed on one side of the first yoke 101b, and a recessed structure 1012 processed on the other side of the first yoke 101b. Thus, when the two winding portions 101 are arranged close together in a ring shape, the protruding structure 1011 of one winding portion 101 can be removed and inserted into the recessed structure 1012 of the other winding portion 101 to achieve a snap-on connection between the two. By connecting multiple winding portions 101 together in this way repeatedly, a stable ring structure can be formed.

[0072] Optionally, refer to Figure 1 、 Figure 5 and Figure 7 The winding assembly includes a plurality of winding parts 101 arranged in a surrounding manner, and the opposite sides of each winding part 101 form a winding groove 102 together with two adjacent winding parts 101. The effective edge portions 21 of the winding group on the two adjacent winding parts 101 are accommodated in the winding groove 102. The inner wall of the winding groove 102 is provided with an insulating film layer, and each winding part 101 is provided with an insulating plastic layer outside the inner wall of the winding groove 102, and the thickness of the plastic layer is greater than the thickness of the film layer.

[0073] Specifically, if Figure 1 and Figure 5 As shown, the winding assembly 10 includes a plurality of winding parts 101 arranged in a circumferential manner. Along the circumferential direction, two adjacent winding parts 101 form a winding groove 102. Half of the space of the winding groove 102 is surrounded by the first load-bearing beam 101a, the first yoke 101b, and the second yoke 101c of one of the winding parts 101, and the other half of the space of the winding groove 102 is surrounded by the first load-bearing beam 101a, the first yoke 101b, and the second yoke 101c of the other winding part 101.

[0074] like Figure 7 As shown, in the embodiment of the present invention, in order to ensure insulation and reduce the space occupied in the winding slot 102, unlike traditional insulation designs, the embodiment of the present invention does not use a plastic bracket for insulation isolation as a whole. Instead, an insulating film layer 40 is set on the inner wall of the winding slot 102, and a plastic layer is used to further fix the film layer and the winding portion 101 at the parts outside the inner wall of the winding slot 102 (for example, at both ends of the winding portion 101 along the length of the winding slot 102). The thickness of the film layer 40 used is less than that of the plastic layer. Therefore, the space freed up by the thinner insulation structure can be used to wind more windings 20, which can improve the slot fill rate.

[0075] Optionally, the film layer 40 is adhered to the inner wall of the winding groove 102 .

[0076] Specifically, in the embodiment of the present invention, the film layer 40 can be attached to the inner wall of the winding groove 102 using an adhesive, which can also reduce the excessive encroachment of other fixing structures on the space inside the winding groove 102. In some embodiments, the film layer 40 can be a relatively thin insulating sticker.

[0077] Optionally, the plastic layer and the winding portion 101 form an insert injection molding structure.

[0078] Specifically, in one embodiment, the winding portion 101 composed of stacked silicon steel sheets can be pre-fixed in an injection mold, and then the injection molding material is squeezed in so that the plastic layer and the winding portion 101 are combined together to form an insert injection molding structure, thereby ensuring the structural reliability of the winding portion 101.

[0079] Optionally, the thickness of the plastic layer is less than or equal to 0.4 mm, and the thickness of the film layer 40 is less than or equal to 0.2 mm.

[0080] Specifically, in one embodiment, the thickness of the aforementioned plastic layer is less than or equal to 0.4 mm, for example, 0.3 mm. The thickness of the film layer 40 should be at least less than the thickness of the plastic layer. In some embodiments, the thickness of the film layer 40 can be less than or equal to 0.2 mm. For example, when using insulating stickers, the thickness of the film layer 40 can be 0.1 mm, which can significantly reduce the insulation thickness within the winding slot 102.

[0081] Reference Figure 1 , the embodiment of the utility model further provides a motor, comprising:

[0082] The winding assembly of any of the preceding embodiments; and

[0083] The magnetic assembly is magnetically coupled to the winding assembly so that the winding assembly and the magnetic assembly rotate relative to each other.

[0084] Specifically, a motor may include a winding assembly and a magnetic assembly. When one of the components is the motor stator, the other corresponds to the rotor. For example, in the embodiments of the present invention, the winding assembly may be the stator, and the magnetic assembly may be the rotor. The magnetic assembly is magnetically coupled to the winding assembly and rotates under the electromagnetic force of the winding assembly. Due to the use of the aforementioned winding assembly, this motor benefits from an increased slot fill rate of the winding assembly, which reduces the motor's resistance and energy consumption, thereby improving the motor's efficiency and power density.

[0085] It should be noted that the motor of the embodiment of the present invention can be used on an electric-assisted bicycle to provide auxiliary power, can be used as a power motor for a multi-rotor drone, or can be a motor on other household appliances such as a small water pump or fan. The winding 20 can be arranged in a concentrated winding manner to reduce the axial size of the motor.

[0086] Optionally, refer to Figure 1 and Figure 8 The magnetic assembly includes a second magnetic conductive part 50 and a permanent magnetic part 51. The second magnetic conductive part 50 includes a second load-bearing beam 501a, a third yoke 501b and a fourth yoke 501c. The third yoke 501b and the fourth yoke 501c are respectively arranged at both ends of the second load-bearing beam 501a. The second load-bearing beam 501a is used to support the permanent magnetic part 51, wherein the fourth yoke 501c is arranged facing the second yoke 101c, and auxiliary grooves 60 are respectively formed on the surfaces opposite to the second yoke 101c.

[0087] Specifically, if Figure 1 and Figure 8As shown in the figure, the magnetic assembly of the embodiment of the present invention may include a second magnetic conductive member 50 and a permanent magnetic member 51. The second magnetic conductive member 50 has a second load-bearing beam 501a, a third yoke 501b and a fourth yoke 501c. The second load-bearing beam 501a is located between the third yoke 501b and the fourth yoke 501c. The permanent magnetic member 51 can be installed and fixed on the position of the second load-bearing beam 501a, and is limited and fixed by the third yoke 501b and the fourth yoke 501c in front and behind. The third yoke 501b is close to the rotation center of the motor, and the fourth yoke 501c is away from the rotation center of the motor. The fourth yoke 501c faces the second yoke 101c.

[0088] A magnetic gap is formed between the fourth yoke 501c and the second yoke 101c. To reduce or even eliminate the vibration and noise caused by this gap, auxiliary slots 60 are formed on the opposing surfaces of the fourth yoke 501c and the second yoke 101c. The design of the auxiliary slots 60 modifies the permeance distribution of the magnetic gap, improves the harmonic distribution of the magnetic field, reduces the radial and tangential forces between the winding assembly and the magnetic assembly, and thus reduces the vibration and noise of the motor.

[0089] Optionally, refer to Figure 2 The auxiliary slot 60 is long and narrow and extends parallel to the rotation axis of the motor.

[0090] Specifically, if Figure 2 As shown in FIG. 1 , the auxiliary slot 60 of the embodiment of the present invention can extend along the motor's rotation axis direction Z, passing through from one end of the fourth yoke 501c and the second yoke 101c to the other end. Thus, the magnetic field harmonic distribution at various locations along the motor's rotation axis is improved.

[0091] Optionally, refer to Figure 8 The cross section of the inner wall of the auxiliary groove 60 in the direction perpendicular to the rotation axis of the motor is arc-shaped.

[0092] Specifically, if Figure 8 As shown, the cross section of the auxiliary slot 60 in the embodiment of the present invention is arc-shaped, and the cross section of the auxiliary slot 60 refers to the cross section formed by cutting along the direction Z perpendicular to the rotation axis of the motor. The diameter of the arc-shaped auxiliary slot can be between 0.5mm and 1.2mm, for example, 0.9mm. Compared with auxiliary slots of other shapes such as rectangles, this arc-shaped auxiliary slot 60 can make the motor have higher electromechanical conversion efficiency. In addition, it should be noted that the number of auxiliary slots 60 is not limited to one, and the position of the auxiliary slot 60 can be in the middle of the fourth yoke 501c, the second yoke 101c, or a position offset relative to the middle, and the embodiment of the present invention does not limit this.

[0093] Optionally, refer to Figure 8, the size of the auxiliary groove 60 of the fourth yoke 501c is different from the size of the auxiliary groove 60 of the second yoke 101c.

[0094] Specifically, in some embodiments, Figure 8 As shown in FIG. , the auxiliary slot 60 provided in the fourth yoke 501c can be of different sizes than the auxiliary slot 60 provided in the second yoke 101c. During specific design and manufacturing, the relative size relationship between the two can be determined based on simulation results to better meet the requirements of low vibration and low noise.

[0095] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0096] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0097] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0098] In the claims, any reference signs placed between brackets shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A winding assembly of a motor, characterized in that: The winding assembly comprises: A first magnetic conductive member includes a winding portion, wherein the winding portion includes a first load beam, a first yoke portion, and a second yoke portion, wherein the first yoke portion and the second yoke portion are respectively provided at two ends of the first load beam; and A winding wire, used for winding around the first load-bearing beam of the winding portion and limited between the first yoke portion and the second yoke portion; The cross section of the winding in the width direction is flat, and the winding includes a wide side in the width direction and a narrow side in the thickness direction; The winding wire is wound on the first load beam to form multiple winding layers, the winding wire on the winding portion includes a torsion portion, and the torsion portion is located at a winding starting position of the bottom winding layer on the first load beam; The torsion portion includes a first line segment, a transition segment and a second line segment. The first line segment is the initial segment of the torsion portion in the direction of entry. The second line segment is connected to the first line segment through the transition segment. The narrow side of the first line segment is arranged facing the first load-bearing beam, and the wide side of the second line segment is arranged facing the first load-bearing beam.

2. The winding assembly according to claim 1, characterized in that The torsion portion is arranged close to the first yoke portion, and each of the windings includes an upper surface and a lower surface located in the wide side direction. The lower surface of the first line segment is arranged facing the side where the first yoke portion is located, and the lower surface of the second line segment is arranged toward the first load-bearing beam.

3. The winding assembly according to claim 2, characterized in that Each of the windings includes two side surfaces located in a narrow side direction, the side surface closest to the first yoke of the two side surfaces abuts against the first yoke, and the lower surface of the first wire segment abuts against the first yoke.

4. The winding assembly according to claim 1, characterized in that A torsion angle of the first line segment relative to the second line segment is greater than or equal to 60 degrees and less than or equal to 120 degrees.

5. The winding assembly according to claim 1, characterized in that The winding assembly includes a plurality of winding parts arranged in a surrounding manner, wherein opposite sides of each winding part respectively form corresponding winding grooves together with two adjacent winding parts, and the size of each winding groove gradually changes in the depth direction to form a larger head end and a smaller head end; The winding includes a plurality of windings, each of the windings is wound on at least one of the winding parts, the winding group on each of the winding parts includes two effective sides arranged opposite to each other, the two effective sides of the winding group on each of the winding parts are respectively accommodated in the winding grooves on both sides of each of the winding parts, and the multiple turns of the coils of each winding layer of each of the effective sides are arranged in sequence along the depth direction of the winding groove; In which, a preset gap is provided between the winding closest to the small head end in the outermost winding layer of one of the two effective sides in each winding slot and the adjacent winding, and the winding closest to the small head end in the outermost winding layer of the other effective side is arranged opposite to the preset gap and is at least partially contained in the preset gap.

6. The winding assembly according to claim 5, characterized in that The two effective sides of the winding group on each winding part are respectively the first effective side and the second effective side, the first effective side on each winding part is provided with the preset gap, and the first effective side on each winding part and the second effective side on the adjacent winding part are accommodated in the same winding groove.

7. The winding assembly according to claim 6, characterized in that The windings closest to the small end in the outermost winding layer of each effective side of each winding portion are all the coils at the end in the wire-out direction.

8. The winding assembly according to claim 6, characterized in that The torsion portion is located at the large end of the winding groove.

9. The winding assembly according to claim 1, characterized in that The winding assembly includes a plurality of winding parts arranged in a surrounding manner, and each winding wire is wound around at least two of the winding parts.

10. The winding assembly according to claim 1, characterized in that The winding assembly includes a plurality of winding parts arranged in a surrounding manner, and each winding part is detachably connected to an adjacent winding part to form a ring structure.

11. The winding assembly according to claim 10, characterized in that Each of the winding parts is detachably connected to the adjacent winding parts via a snap-fit ​​structure.

12. The winding assembly according to claim 11, characterized in that A protruding structure is provided on one side of each winding part, and a concave structure is provided on the other opposite side. The protruding structure of each winding part is engaged with the concave structure of the adjacent winding part on one side, and the concave structure of each winding part is engaged with the protruding structure of the adjacent winding part on the other side.

13. The winding assembly according to claim 1, characterized in that The winding assembly includes a plurality of winding parts arranged in a surrounding manner, and the opposite sides of each winding part form a winding groove together with two adjacent winding parts. The effective edge portions of the winding group on the two adjacent winding parts are accommodated in the winding groove, and the inner wall of the winding groove is provided with an insulating film layer. Each winding part is provided with an insulating plastic layer outside the inner wall of the winding groove, and the thickness of the plastic layer is greater than the thickness of the film layer.

14. The winding assembly according to claim 13, characterized in that The film layer is adhered to the inner wall of the winding groove.

15. The winding assembly according to claim 14, characterized in that The film layer is an insulating sticker.

16. The winding assembly according to claim 13, characterized in that The plastic layer and the winding portion form an insert injection molding structure.

17. The winding assembly according to claim 16, characterized in that The thickness of the plastic layer is less than or equal to 0.4 mm, and the thickness of the film layer is less than or equal to 0.2 mm.

18. A motor, characterized in that: include: The winding assembly according to any one of claims 1 to 17; as well as, The magnetic assembly is magnetically coupled to the winding assembly so that the winding assembly and the magnetic assembly rotate relative to each other.

19. The motor according to claim 18, characterized in that The magnetic assembly includes a second magnetic conductive part and a permanent magnetic part, the second magnetic conductive part includes a second load-bearing beam, a third yoke and a fourth yoke, the third yoke and the fourth yoke are respectively arranged at both ends of the second load-bearing beam, and the second load-bearing beam is used to support the permanent magnetic part, wherein the fourth yoke is arranged facing the second yoke, and auxiliary grooves are respectively formed on the surfaces opposite to the second yoke.

20. The motor according to claim 19, characterized in that The auxiliary slot is long and narrow and extends parallel to the rotation axis of the motor.

21. The motor according to claim 20, characterized in that The cross section of the inner wall of the auxiliary groove in a direction perpendicular to the rotation axis of the motor is arc-shaped.

22. The motor according to claim 21, characterized in that The auxiliary groove of the fourth yoke has a size different from that of the auxiliary groove of the second yoke.

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