Stator and brushless motor

Abstract

The present disclosure addresses the problem of improving a coil space factor. A stator (S1) comprises: a plurality of stator blocks (1) arranged in the circumferential direction; and a plurality of coils (2) provided by winding winding wires (20) on the respective stator blocks (1). The stator (S1) comprises a plurality of insulating members (3) for electrically insulating the stator blocks (1) and the coils (2) for respective sets of the stator blocks (1) and the coils (2). Each of the stator blocks (1) has a yoke part (10) positioned at the outermost circumference, and a tooth part (11) projecting from the inner circumferential surface of the yoke part (10). Each of the insulating members (3) has a pair of insulating plates (30) arranged at positions facing each other with the corresponding tooth part (11) therebetween. The insulating plates (30) are formed wider than the tooth part (11).

Description

[Technical Field]

[0001] The present disclosure relates to a stator and a brushless motor, and more particularly to a bobbinless stator and a brushless motor having the stator. [Background technology]

[0002] As a conventional example, the coil unit described in Patent Document 1 is exemplified. The coil unit described in Patent Document 1 includes a coil and a partial molded portion molded integrally with the coil. The partial molded portion is fitted into the teeth portion of the split core to attach the split core to the coil unit. The partial molded portion ensures that the gap between the coil unit and the split core is within an appropriate range. Then, when the entire unit including the coil unit is molded, resin is filled into the entire gap, eliminating any voids between the coil and the split core.

[0003] However, in the conventional example described in Patent Document 1, the teeth of the split core are resin-molded, and the partial molded portion increases the distance between the teeth and the coil, making it difficult to improve the space factor of the coil. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-114998 Summary of the Invention

[0005] An object of the present disclosure is to provide a stator and a brushless motor that can improve the space factor of the coil.

[0006] A stator according to one aspect of the present disclosure includes a plurality of stator blocks arranged in a circumferential direction and a plurality of coils each having a winding wound around the plurality of stator blocks. The stator includes a plurality of insulating members for electrically insulating the stator block from the coil for each set of the plurality of stator blocks and the plurality of coils. Each of the plurality of stator blocks has a yoke portion located at the outermost periphery and teeth portions protruding from the inner circumferential surface of the yoke portion. Each of the plurality of insulating members includes: In the axial direction A pair of insulating plates arranged at positions facing each other with the teeth portion interposed therebetween a connecting portion disposed opposite to the outer peripheral surface of the yoke portion and connecting the pair of insulating plates together; The pair of insulating plates are formed to be wider than the teeth.

[0007] A brushless motor according to one aspect of the present disclosure includes the stator and a rotor rotatably disposed inside the stator. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a stator and a brushless motor according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view of the stator of the same. [Figure 3] FIG. 3 is a perspective view of the stator of the same. [Figure 4] FIG. 4 is a front view of a plate member in the stator. [Figure 5] FIG. 5 is a front view of the stator of the first modification, with a portion of the insulating member omitted. [Figure 6] FIG. 6 is a front view of the stator of the first modification, with a portion of the insulating member omitted. [Figure 7] FIG. 7 is a front view of the stator of the first modification, with a portion of the insulating member omitted. [Figure 8] FIG. 8 is a front view of a stator block and an insulating member in the second modification of the stator. [Figure 9] FIG. 9 is a plan view of the stator block and insulating member of the same. [Figure 10] FIG. 10 is a side view of the stator block and insulating member of the same. [Figure 11] FIG. 11 is a front view showing another configuration of the stator block in the second modification of the stator of the same as above. [Figure 12] FIG. 12 is a front view of a stator block and an insulating member in the third modification of the stator. [Figure 13] FIG. 13 is a plan view of the stator block and insulating member of the same. [Figure 14] FIG. 14 is a side view of the stator block and insulating member of the same. [Figure 15] FIG. 15 is a front view of the stator of the third modified example, with a portion thereof omitted. [Figure 16] FIG. 16 is a partially omitted front view of the fourth modification of the stator. DETAILED DESCRIPTION OF THE INVENTION

[0009] A stator and a brushless motor according to embodiments of the present disclosure will be described in detail below with reference to the drawings. However, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components do not necessarily reflect the actual dimensional ratios. Note that the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0010] (1) Overview As shown in FIG. 1, a brushless motor M1 (hereinafter abbreviated as brushless motor M1) according to an embodiment of the present disclosure comprises a stator S1 (hereinafter abbreviated as stator S1) according to an embodiment of the present disclosure, and a rotor R1 rotatably arranged inside the stator S1.

[0011] The rotor R1 has a rotor core 50 made of a soft magnetic material and formed into a cylindrical shape, and a plurality of (six in the illustrated example) permanent magnets 51. A cylindrical shaft hole 500 penetrates the center of the rotor core 50. A rotating shaft (not shown) is inserted into this shaft hole 500.

[0012] Each of the six permanent magnets 51 is formed in the shape of a rectangular flat plate and is housed inside the rotor core 50 so as to be aligned at equal intervals along the circumferential direction of the rotor core 50.

[0013] The stator S1 includes a plurality of (nine in the illustrated example) stator blocks 1 arranged in the circumferential direction, and a plurality of coils 2 each formed by winding a winding 20 around each of the plurality of stator blocks 1 (see FIG. 1). The stator S1 also includes a plurality of (nine in the illustrated example) insulating members 3 for electrically insulating the stator block 1 from the coil 2 for each set of the plurality of stator blocks 1 and the plurality of coils 2.

[0014] Each of the plurality of stator blocks 1 has a yoke portion 10 located on the outermost periphery and teeth portions 11 protruding from the inner circumferential surface of the yoke portion 10.

[0015] Each of the insulating members 3 has a pair of insulating plates 30 arranged at positions facing each other with the tooth portion 11 interposed therebetween. The pair of insulating plates 30 are formed to be wider than the tooth portion 11.

[0016] When the coils 2 of the stator S1 are excited, magnetic attraction and repulsion act between each stator block 1 and the rotor R1, allowing the rotor R1 to rotate in both directions relative to the stator S1. The rotating shaft inserted into the shaft hole 500 of the rotor R1 can also rotate integrally with the rotor R1.

[0017] Here, in the stator S1, the pair of insulating plates 30 are formed wider than the teeth 11, so that a space (insulation distance) corresponding to the difference in width between the insulating plates 30 and the teeth 11 is formed between the winding 20 of the coil 2 and both side surfaces of the teeth 11. As a result, the stator S1 can improve the space factor of the coil 2 compared to when the winding 20 is wound around the teeth 11 via a bobbin.

[0018] (2) Stator details (2-1) Stator block All of the multiple stator blocks 1 have the same configuration. In the following description, unless otherwise specified, the up-down, front-rear, and left-right directions indicated by arrows in Fig. 2 are defined as the up-down, front-rear, and left-right directions of the stator block 1.

[0019] As shown in FIGS. 2 and 3, the stator block 1 has a yoke portion 10, teeth portions 11, and a flange portion 13.

[0020] The yoke part 10 is formed in the shape of a quadrangular prism. More specifically, the front, rear, left and right sides of the yoke part 10 are rectangular, and the top and bottom sides are trapezoidal. The upper and bottom sides of the front of the yoke part 10 are shorter than the upper and bottom sides of the rear of the yoke part 10, and the left and right sides of the front of the yoke part 10 are the same length as the left and right sides of the rear of the yoke part 10.

[0021] The teeth 11 are formed in a rectangular parallelepiped shape. The height of the teeth 11 is equal to the height of the yoke 10. In other words, the upper and lower surfaces of the teeth 11 are flush with the upper and lower surfaces of the yoke 10, respectively. The teeth 11 protrude forward from the center in the left-right direction of the front surface of the yoke 10. The front surface of the teeth 11 is curved into a cylindrical surface (see FIGS. 1 and 2).

[0022] The flange portion 13 is formed in a plate shape with the vertical direction as the longitudinal direction, and protrudes leftward and rightward from the front end portions of the left and right sides of the teeth portion 11. The height of the flange portion 13 is equal to the height of the teeth portion 11. However, the front surface of the flange portion 13 is curved cylindrically and is flush with the front surface of the teeth portion 11.

[0023] Here, it is preferable that the yoke portion 10, the teeth portion 11, and the flange portion 13 are integrally formed from a soft magnetic material such as silicon steel plate, ferrite, amorphous alloy, etc. Alternatively, the yoke portion 10, the teeth portion 11, and the flange portion 13 may be formed separately and then joined together.

[0024] (2-2) Insulating material The insulating member 3 has a pair of insulating plates 30, a connecting portion 32, and a fixing portion 33 (see FIGS. 1 to 3).

[0025] Each of the pair of insulating plates 30 is formed in the shape of a rectangular flat plate. However, the pair of insulating plates 30 are formed to have the same shape and the same dimensions. The width dimension of the insulating plate 30 in the left-right direction (short direction) is greater than the width dimension of the tooth portion 11 in the left-right direction and smaller than the width dimension of the yoke portion 10 in the left-right direction. The width dimension of the insulating member 3 in the front-rear direction (longitudinal direction) is slightly smaller than the width dimension of the stator block 1 in the front-rear direction (see FIG. 1). One insulating plate 30 is disposed above the upper surface of the stator block 1, and the other insulating plate 30 is disposed below the lower surface of the stator block 1.

[0026] The connecting portion 32 is formed in the shape of a rectangular flat plate. One longitudinal end (upper end) of the connecting portion 32 is connected to the rear end of the insulating plate 30 arranged on the upper surface of the stator block 1. The other longitudinal end (lower end) of the connecting portion 32 is connected to the rear end of the insulating plate 30 arranged below the lower surface of the stator block 1. In other words, the pair of insulating plates 30 are connected at their respective rear ends by the connecting portion 32 (see FIGS. 2 and 3). The connecting portion 32 is fitted into a groove 100 provided in the rear surface of the yoke portion 10 (see FIG. 3). The groove 100 is provided in the center of the rear surface of the yoke portion 10 in the left-right direction, over the entire length of the yoke portion 10 in the up-down direction. The pair of insulating plates 30 and the connecting portion 32 are preferably integrally molded from an electrically insulating synthetic resin material.

[0027] Two fixing portions 33 are provided on each of the pair of insulating plates 30. Each fixing portion 33 is formed in a hook shape when viewed in the left-right direction (see FIG. 2). One fixing portion 33 protrudes in the left-right direction from each of the left and right side surfaces of each insulating plate 30, from a position toward the rear of the center of each insulating plate 30 in the front-to-rear direction. The tips of the two fixing portions 33 provided on the upper insulating plate 30 protrude downward. On the other hand, the tips of the two fixing portions 33 provided on the lower insulating plate 30 protrude upward (see FIG. 2).

[0028] (2-3) Coil The coil 2 has a winding 20 made of a conductor such as copper or a copper alloy. The coil 2 is configured by winding the winding 20 around the teeth 11 and a pair of insulating plates 30.

[0029] Here, each of the pair of insulating plates 30 is formed wider than the tooth portion 11. For example, it is preferable that each insulating plate 30 is formed wider than the tooth portion 11 by about 0.3 mm. By forming each of the pair of insulating plates 30 wider than the tooth portion 11, an insulation distance is ensured between the winding 20 and both left and right side surfaces of the tooth portion 11. As a result, the stator S1 can improve the space factor of the coil 2 compared to when the winding 20 is wound around the tooth portion 11 via a bobbin. Note that although the number of turns of the coil 2 is 6 (6 turns) in FIGS. 1 to 3, it may be 7 (7 turns) or more. Furthermore, if the winding 20 is covered with an insulator, the windings 20 can be wound in two or more overlapping layers.

[0030] (3) Stator manufacturing method Next, a method for manufacturing the stator S1 will be described. However, the manufacturing method described below is an example, and the order of some of the steps may be changed. Note that the manufacturing method described below is automated using various manufacturing devices, but some of the steps may also be performed manually. Also, a description of the manufacturing method for the stator block 1 will be omitted.

[0031] The manufacturing method of the stator S1 (hereinafter simply referred to as the manufacturing method) described below includes at least a first step, a second step, a third step, and a fourth step.

[0032] The first step is to attach the insulating member 3 to the stator block 1. First, the connecting portions 32 are bent to widen the gap between the pair of insulating plates 30, and the insulating member 3 is placed over the rear of the yoke portion 10 of the stator block 1. When the force that was bending the connecting portions 32 is removed, the connecting portions 32 fit into the grooves 100 on the rear surface of the yoke portion 10, and the tips of the pair of fixing portions 33 of each insulating plate 30 fit into recesses 101 provided on both the left and right ends of the front surface of the yoke portion 10 (see FIGS. 2 and 3). In this way, the insulating member 3 is attached to the stator block 1.

[0033] The second step is a step of winding the windings 20 around each of the multiple stator blocks 1 to provide the coils 2. The windings 20 are wound, for example, by a winding machine. The windings 20 are wound around the teeth 11 so as to span the pair of insulating plates 30. At this time, an insulation distance corresponding to the difference in width between the insulating plates 30 and the teeth 11 is ensured between the windings 20 and both the left and right side surfaces of the teeth 11 that are not covered with the insulating member 3.

[0034] The third step is to line up multiple stator blocks 1, each with a coil 2, in the circumferential direction. As shown in Fig. 1, nine stator blocks 1 are lined up in a ring shape with the left and right side surfaces of each yoke portion 10 in contact with each other.

[0035] The fourth step is to join the nine stator blocks 1 arranged in the circumferential direction. Specifically, the yoke portions 10 of two adjacent stator blocks 1 are joined together by an appropriate method such as welding or adhesive. Then, when all nine stator blocks 1 are joined together, the stator S1 is completed.

[0036] The stator block 1 may be formed by stacking a plurality of plate materials 4 in the thickness direction of the plate materials 4. As shown in FIG. 4, each of the plurality of plate materials 4 is formed in the same shape as the top surface of the stator block 1. The grooves 100 and recesses 101 of the yoke portion 10 are each formed by notches 40 provided in the plate materials 4. The stator block 1 is formed by joining the plurality of plate materials 4 stacked in the thickness direction together by an appropriate method such as welding or adhesive bonding.

[0037] When the stator block 1 is configured as a stack of multiple plate materials 4 as described above, the grooves 100 and recesses 101 of the yoke portion 10 can be configured as notches 40 in the plate materials 4. Therefore, compared to when the grooves 100 and recesses 101 are provided directly in the yoke portion 10, the grooves 100 and recesses 101 can be formed more easily.

[0038] (4) Modified Stator Next, a modification of the stator S1 according to the embodiment will be described.

[0039] (4-1) Variation 1 In the stator S1 of the first modification, each of the plurality of insulating members 3 further includes an alignment portion 31 provided on each of the pair of insulating plates 30 to align the windings 20.

[0040] 5 and 6, the alignment portion 31 has a plurality of protrusions 311 provided on each of the pair of insulating plates 30. The plurality of protrusions 311 are aligned at regular intervals along the front-to-rear direction of each insulating plate 30. As shown in FIG. 5, the plurality of protrusions 311 are provided so as to protrude leftward and rightward from the left and right sides of each insulating plate 30. Alternatively, as shown in FIG. 6, the plurality of protrusions 311 may be provided so as to protrude upward and downward from both left and right ends of the upper surface of the upper insulating plate 30 and the lower surface of the lower insulating plate 30, respectively.

[0041] 7, the alignment portion 31 may have a plurality of recesses 310 formed in the pair of insulating plates 30. The alignment portion 31 can accommodate and align the windings 20 in each of the plurality of recesses 310.

[0042] Thus, in the stator S1 of the first modification, the alignment portions 31 provided on the insulating member 3 allow the windings 20 to be wound in alignment with each tooth portion 11 in the multiple stator blocks 1. As a result, the stator S1 of the first modification can more easily align the windings 20 than when the alignment portions 31 are not provided, and misalignment of the windings 20 can be suppressed.

[0043] (4-2) Variation 2 The stator S1 of the second modification is characterized by the mounting structure of the insulating member 3 to the stator block 1.

[0044] 8 to 10, the insulating member 3 in Modification 2 does not have a connecting portion that connects the pair of insulating plates 30. Furthermore, instead of the hook-shaped fixing portion 33, the insulating member 3 in Modification 2 has fixing portions that are made up of a pair of protrusions 35 that protrude downward from the lower surface of the upper insulating plate 30 and a pair of protrusions 35 that protrude upward from the upper surface of the lower insulating plate 30.

[0045] Each of the protrusions 35 is formed in a cylindrical shape. The protrusions 35 protrude from the upper or lower surface of the insulating plate 30 so as to be aligned at intervals in the front-to-rear direction. It is preferable that each of the protrusions 35 is formed integrally with the insulating plate 30 using a synthetic resin material.

[0046] On the other hand, the stator block 1 in Modification 2 has two holes 110 on the upper and lower surfaces of the teeth 11, into which a pair of protrusions 35 of each insulating plate 30 is fitted, respectively. The inner peripheral surfaces of these holes 110 are formed cylindrical. A pair of protrusions 35 on the upper insulating plate 30 is fitted into each of the two holes 110 on the upper surface of the teeth 11. Similarly, a pair of protrusions 35 on the lower insulating plate 30 is fitted into each of the two holes 110 on the lower surface of the teeth 11. It is preferable that each protrusion 35 is fixed to the teeth 11 by an appropriate method such as welding or adhesive. Alternatively, the insulating plate 30 may be fixed to the stator block 1 by protruding ribs from the peripheral surface of each protrusion 35 and press-fitting each protrusion 35 into the hole 110 while crushing the rib.

[0047] Therefore, the stator S1 of the second modification can be made smaller by simplifying the structure of the insulating members 3.

[0048] In addition, in the stator block 1 of variant example 2, if the yoke portion 10 and the tooth portion 11 are separated as shown in Figure 11, the tooth portion 11 around which the winding 20 is wound may be connected to the yoke portion 10 via a pair of insulating plates 30.

[0049] (4-3) Variation 3 The stator S1 of the third modification is characterized by the structure of the insulating members 3. Each of the insulating members 3 in the third modification further has a connecting portion 34 that connects adjacent connecting portions 32 together (see FIGS. 12 to 14).

[0050] The coupling portion 34 is formed in a rectangular column shape. The coupling portion 34 protrudes leftward and rightward from the center in the up-down direction on both the left and right side surfaces of the connecting portion 32. The tip surfaces (left and right side surfaces) of the coupling portion 34 are inclined rearward so as to be flush with the left and right side surfaces of the yoke portion 10 (see FIG. 12).

[0051] In the stator S1 of the third modification, the joint portions 34 of adjacent insulating members 3 are joined together by an appropriate method such as adhesive (see FIG. 15). That is, the manufacturing process of the stator S1 of the third modification can be simplified compared to when the yoke portions 10 of adjacent stator blocks 1 are joined together.

[0052] (4-4) Variation 4 The stator S1 of the fourth modification is characterized by the structure of the plurality of stator blocks 1 and the insulating member 3.

[0053] In the stator S1 of the fourth modification, the width dimension (length dimension in the left-right direction) of the connecting portions 32 of the multiple insulating members 3 is smaller than the width dimension (width dimension in the left-right direction) of the teeth portions 11 of the stator block 1 (see FIG. 16 ). Also, in the stator S1 of the fourth modification, the width dimension (width dimension in the left-right direction) of the grooves 100 provided in the outer peripheral surface (rear surface) of the yoke portion 10 is smaller than the width dimension of the teeth portions 11 and is equal to or larger than the width dimension of the connecting portions 32. Furthermore, in the stator S1 of the fourth modification, the depth (depth in the front-rear direction) of the grooves 100 is equal to or larger than the thickness (thickness in the front-rear direction) of the connecting portions 32.

[0054] Therefore, in the stator S1 of the fourth modification, the width dimensions of the connecting portions 32 and the width dimensions of the groove portions 100 are smaller than the width dimensions of the tooth portions 11, so the magnetic flux passing through the stator block 1 is less affected by the connecting portions 32. Also, in the stator S1 of the fourth modification, the depth of the groove portions 100 is equal to or greater than the thickness of the connecting portions 32, so the connecting portions 32 do not protrude from the outer peripheral surface of the yoke portion 10. As a result, the stator S1 of the fourth modification can be made smaller in the radial direction (the front-to-rear direction of the stator block 1).

[0055] (5) Other advantages of the stator In each insulating member 3, the pair of insulating plates 30 are connected by a connecting portion 32, thereby improving the workability of attaching the insulating member 3 to the stator block 1. The connecting portion 32 is disposed in a position facing the outer peripheral surface of the yoke portion 10. This eliminates the effect of the connecting portion 32 on the gap between the stator S1 and the rotor R1 (see FIG. 1).

[0056] (6) Summary A stator (S1) according to a first aspect of the present disclosure includes a plurality of stator blocks (1) arranged in a circumferential direction and a plurality of coils (2) each formed by winding a winding (20) around each of the plurality of stator blocks (1). The stator (S1) according to the first aspect includes a plurality of insulating members (3) for electrically insulating the stator blocks (1) from the coils (2) for each set of the plurality of stator blocks (1) and the plurality of coils (2). Each of the plurality of stator blocks (1) has a yoke portion (10) located at the outermost periphery and teeth portions (11) protruding from the inner circumferential surface of the yoke portion (10). Each of the plurality of insulating members (3) has a pair of insulating plates (30) arranged in opposing positions across the teeth portions (11). The pair of insulating plates (30) are formed wider than the teeth portions (11).

[0057] In the stator S1 according to the first aspect, a space (insulation distance) corresponding to the difference in width between the insulating plate 30 and the teeth 11 is formed between the winding 20 of the coil 2 and the teeth 11. As a result, the stator S1 according to the first aspect can improve the space factor of the coil 2.

[0058] A stator (S1) according to a second aspect of the present disclosure can be realized by combining it with the first aspect. In the stator (S1) according to the second aspect, it is preferable that each of the plurality of insulating members (3) further has a connecting portion (32) that connects the pair of insulating plates (30) together.

[0059] The stator (S1) according to the second aspect can improve the workability when attaching the insulating member (3) to the stator block (1).

[0060] A stator (S1) according to a third aspect of the present disclosure can be realized by combining it with the second aspect. In the stator (S1) according to the third aspect, the connecting portion (32) is preferably disposed at a position facing the outer peripheral surface of the yoke portion (10).

[0061] In the stator (S1) according to the third aspect, the connecting portion (32) is not disposed between the stator block (1) and the rotor (R1), so that the influence of the connecting portion (32) on the gap between the stator (S1) and the rotor (R1) can be eliminated.

[0062] A stator (S1) according to a fourth aspect of the present disclosure can be realized by combining it with the third aspect. In the stator (S1) according to the fourth aspect, it is preferable that a groove portion (100) that fits with the connecting portion (32) is provided on the outer peripheral surface of the yoke portion (10).

[0063] In the stator (S1) according to the fourth aspect, at least a portion of the connecting portion (32) is fitted into the groove portion (100), thereby making it possible to reduce the protruding dimension of the connecting portion (32) protruding from the outer peripheral surface of the yoke portion (10).

[0064] A stator (S1) according to a fifth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the stator (S1) according to the fifth aspect, it is preferable that the width dimension along the circumferential direction of the connecting portion (32) is smaller than the width dimension along the circumferential direction of the tooth portion (11).

[0065] In the stator (S1) according to the fifth aspect, the magnetic flux passing through the stator block (1) is less susceptible to the influence of the connecting portion (32).

[0066] A stator (S1) according to a sixth aspect of the present disclosure can be realized by combining it with any one of the first to fifth aspects. In the stator (S1) according to the sixth aspect, it is preferable that each of the plurality of insulating members (3) has one or more fixing portions (33) fixed to a corresponding one of the plurality of stator blocks (1).

[0067] The stator (S1) according to the sixth aspect has the fixing portion (33), so that the insulating member (3) can be easily fixed to the stator block (1).

[0068] A stator (S1) according to a seventh aspect of the present disclosure can be realized by combining with the sixth aspect. In the stator (S1) according to the seventh aspect, the fixed portion (33) is formed in a hook shape and is attached to the yoke portion (10). Hook It is preferable that

[0069] In the stator (S1) according to the seventh aspect, the fixed portion (33) can be easily fixed to the yoke portion (10).

[0070] A stator (S1) according to an eighth aspect of the present disclosure can be realized by combining it with the seventh aspect. In the stator (S1) according to the eighth aspect, the yoke portion (10) preferably has a recess (101) for accommodating the fixed portion (33) at a position where the fixed portion (33) is hooked.

[0071] In the stator (S1) according to the eighth aspect, the fixed portion (33) is unlikely to get in the way when winding the winding (20), and therefore the workability of winding the winding (20) can be improved.

[0072] A stator (S1) according to a ninth aspect of the present disclosure can be realized by combining it with the eighth aspect. In the stator (S1) according to the ninth aspect, each of the plurality of stator blocks (1) is preferably formed by stacking a plurality of plate materials (4) in the thickness direction of the plate materials (4). The recesses (101) are preferably formed by notches (40) provided in the plurality of plate materials (4).

[0073] In the stator S1 according to the ninth aspect, when the stator block 1 is formed as a stack of a plurality of plate materials 4, the recesses 101 in the yoke portion 10 can be formed by the notches 40 in the plate materials 4. Therefore, in the stator S1 according to the twelfth aspect, the recesses 101 can be formed more easily than when the recesses 101 are provided directly in the yoke portion 10.

[0074] A stator (S1) according to a tenth aspect of the present disclosure can be realized by combining it with the sixth aspect. In the stator (S1) according to the tenth aspect, the fixing portions (protrusions 35) are preferably configured to protrude from each of the pair of insulating plates (30) toward the teeth (11). The fixing portions are preferably configured to fit into holes (110) formed in the teeth (11).

[0075] In the stator (S1) according to the tenth aspect, the pair of insulating plates (30) can be easily fixed to the teeth (11).

[0076] A stator (S1) according to an eleventh aspect of the present disclosure can be realized by combining it with any one of aspects 2 to 5. In the stator (S1) according to the eleventh aspect, it is preferable that each of the plurality of insulating members (3) further has a connecting portion (34) that connects adjacent connecting portions (32) to each other.

[0077] In the stator (S1) according to the eleventh aspect, the plurality of insulating members (3) can be easily joined together by the joining portions (34).

[0078] A stator (S1) according to a twelfth aspect of the present disclosure can be realized by combining it with any one of the first to eleventh aspects. In the stator (S1) according to the twelfth aspect, it is preferable that each of the plurality of insulating members (3) further includes an alignment portion (31) provided on each of the pair of insulating plates (30) to align the windings (20).

[0079] In the stator S1 according to the twelfth aspect, the windings 20 can be wound in alignment with each tooth 11 in a plurality of stator blocks 1 by using the alignment portions 31 provided on the insulating member 3. As a result, the stator S1 according to the twelfth aspect can more easily align the windings 20 than in a case where the alignment portions 31 are not provided, and misalignment of the windings 20 can be suppressed.

[0080] A stator (S1) according to a thirteenth aspect of the present disclosure can be realized by combining it with the twelfth aspect. In the stator (S1) according to the thirteenth aspect, it is preferable that the alignment portion (31) has a plurality of recesses (310) formed in the pair of insulating plates (30), and that the windings (20) are housed in and aligned in each of the plurality of recesses (310).

[0081] In the stator (S1) according to the thirteenth aspect, the windings (20) can be easily aligned by the alignment portion (31).

[0082] A brushless motor (M1) according to a fourteenth aspect of the present disclosure includes a stator (S1) according to any one of the first to thirteenth aspects, and a rotor (R1) rotatably disposed inside the stator (S1).

[0083] In the brushless motor (M1) according to the fourteenth aspect, a space (insulation distance) corresponding to the difference in width dimensions between the insulating plate (30) and the tooth portion (11) is formed between the winding (20) of the coil (2) and the tooth portion (11), thereby improving the space factor of the coil (2). [Explanation of symbols]

[0084] M1 Brushless Motor S1 Stator R1 rotor 1 stator block 2 coils 3. Insulating materials 4 Board material 10. Yoke 11 Teeth 20 windings 30 Insulating plate 31 Alignment Section 32 Connecting part 33 Fixed part 34 Joint 35 Protrusion (fixed part) 40 Notch 100 Groove 101 Recess 110 holes 310 Recess 311 protrusion

Claims

1. A plurality of stator blocks arranged in a circumferential direction; a plurality of coils each having a winding wound around each of the plurality of stator blocks; a plurality of insulating members for electrically insulating the stator blocks and the coils for each of the plurality of stator blocks and the plurality of coils; Equipped with Each of the plurality of stator blocks includes: A yoke portion located at the outermost periphery; a teeth portion protruding from an inner peripheral surface of the yoke portion; having each of the plurality of insulating members includes a pair of insulating plates arranged at positions facing each other across the teeth portion in the axial direction, and a connecting portion arranged at a position facing an outer circumferential surface of the yoke portion and connecting the pair of insulating plates to each other; The pair of insulating plates are formed to be wider than the teeth portion. Stator.

2. The outer peripheral surface of the yoke portion is provided with a groove portion that fits into the connecting portion. The stator of claim 1 .

3. A width dimension of the connecting portion along the circumferential direction is smaller than a width dimension of the teeth portion along the circumferential direction. The stator according to claim 2.

4. Each of the plurality of insulating members has one or more fixing portions fixed to a corresponding one of the plurality of stator blocks. The stator according to any one of claims 1 to 3.

5. The fixing portion is formed in a hook shape and hooked onto the yoke portion.

5. The stator according to claim 4.

6. The yoke portion has a recess for accommodating the fixing portion at a portion where the fixing portion is hooked. The stator according to claim 5.

7. Each of the plurality of stator blocks is configured by stacking a plurality of plate materials in a thickness direction of the plate materials, The recesses are formed by notches provided in the plurality of plate materials. The stator according to claim 6.

8. The fixing portion is configured to protrude from each of the pair of insulating plates toward the teeth portion and to engage with a hole provided in the teeth portion.

5. The stator according to claim 4.

9. Each of the plurality of insulating members further has a connecting portion that connects adjacent connecting portions to each other. The stator according to any one of claims 1 to 3.

10. Each of the plurality of insulating members further has an alignment portion provided on each of the pair of insulating plates to align the windings. A stator according to any one of claims 1 to 9.

11. The alignment portion has a plurality of recesses provided in the pair of insulating plates, and the windings are accommodated in each of the plurality of recesses to align them. The stator of claim 10.

12. A stator according to any one of claims 1 to 11, A rotor rotatably disposed inside the stator; Equipped with Brushless motor.

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