Motor

Abstract

To reduce cost and weight.SOLUTION: The motor includes a plurality of split cores arranged in a circumferential direction. A plurality of recesses are formed on the outer peripheral surfaces of the plurality of split cores. Among the plurality of split cores, the resin member is in close contact with the recessed portions of the split cores adjacent to each other in the circumferential direction and the other split cores. The resin member connects one split core and another split core. The split core includes a portion in contact with another split core. The other split core includes a portion in contact with the split core. A plurality of recesses are formed on the outer peripheral surface of the contact portion of the split core. Another recess included in the plurality of recesses is formed on an outer peripheral surface of a portion in contact with the other split core.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a motor. [Background technology]

[0002] In rotating electrical machines such as motors, techniques for assembling split cores to form an annular stator core are known. When assembling the split cores, techniques for joining the split cores by using a split core joining member to connect locking grooves formed on both sides of the split cores, and techniques for arranging the split cores in an annular shape and fitting them inside the split core pressing plate portion of the stator cover are known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-181359 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-266982 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned techniques, a large amount of resin material is required to connect the split cores, which may increase the cost and weight of the motor.

[0005] One object of the present invention is to provide a motor that can reduce costs and weight. [Means for solving the problem]

[0006] In one aspect, the motor includes a plurality of split cores arranged circumferentially. A plurality of recesses are formed on the outer peripheral surfaces of the plurality of split cores. A resin member is in close contact across the recesses of circumferentially adjacent split cores among the plurality of split cores and the other split cores. The resin member connects the split core to the other split cores. The split cores have portions that contact the other split cores. The outer peripheral surfaces of the contacting portions of the split cores have recesses that correspond to the plurality of recesses. The outer peripheral surfaces of the contacting portions of the other split cores have other recesses that correspond to the plurality of recesses.

[0007] According to one aspect, cost and weight can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a partial cross-sectional view showing an example of a motor according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing an example of a split core according to the first embodiment. [Figure 3] FIG. 3 is a perspective view showing an example of a stator core according to the first embodiment. [Figure 4] FIG. 4 is a top view showing an example of stator cores connected by a resin member according to the first embodiment. [Figure 5] FIG. 5 is a partially see-through perspective view showing an example of connected stator cores in the first embodiment. [Figure 6] FIG. 6 is a side cross-sectional view showing an example of connected stator cores in the first embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing an example of connected stator cores in the first embodiment. [Figure 8] FIG. 8 is a perspective view showing an example of connected stator cores in the second embodiment. [Figure 9] FIG. 9 is a side cross-sectional view showing an example of connected stator cores in the second embodiment. [Figure 10]FIG. 10 is a cross-sectional view showing an example of a split core according to the second embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing an example of connected stator cores in the second embodiment. [Figure 12] FIG. 12 is a perspective view showing an example of stator cores connected by a resin member in the first modified example. [Figure 13] FIG. 13 is a side cross-sectional view showing an example of connected stator cores in the first modified example. [Figure 14] FIG. 14 is a perspective view showing an example of stator cores connected by a resin member in the second modified example. [Figure 15] FIG. 15 is an enlarged cross-sectional view showing an example of a connecting portion of split cores in the second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of a motor disclosed herein will be described in detail below with reference to the drawings. Note that the dimensional relationships and ratios of elements in the drawings may differ from reality. The dimensional relationships and ratios may also differ between the drawings. To facilitate understanding, each drawing may illustrate a coordinate system in which the direction in which a shaft 99 (described later) extends is the Z-axis direction, and the direction in which the protruding portion 15 of the split core 10B protrudes (inward in the radial direction) is the negative side of the X-axis. Note that the same components are designated by the same reference numerals throughout the description of the embodiments.

[0010] [First embodiment] First, the motor according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a partial cross-sectional view showing an example of the motor according to the first embodiment. As shown in Fig. 1, the motor 1 according to the first embodiment includes a frame 91, a stator 2, a rotor 92, and a shaft 99.

[0011] The frame 91 houses the stator 2 and the rotor 92. The motor 1 in the first embodiment is a so-called inner rotor type motor in which the rotor 92 is disposed radially inside the stator 2, as shown in FIG.

[0012] The shaft 99 is fixed to the center of the rotor 92 in the radial direction and rotates in conjunction with the rotor 92. One or both ends of the shaft 99 in the Z-axis direction protrude outward from the frame 91, as shown in Fig. 1. The Z-axis direction along which the shaft 99 extends is an example of the rotation axis direction.

[0013] The stator 2 includes a plurality of split cores 10A to 10L arranged in the circumferential direction. In the first embodiment, the split cores 10A to 10L each have the same shape. In the following description, the split cores 10A to 10L may be referred to as split cores 10 without distinction.

[0014] As shown in FIG. 1 , an insulator 81 is attached to the split core 10. A coil 82 is wound around the split core 10 via the insulator 81. The insulator 81 is made of an insulating material such as resin. The coil 82 is made of a conductor made of copper or the like. The stator 2 is formed by connecting the split cores 10, each equipped with the insulator 81 and the coil 82, in an annular shape in the circumferential direction. Note that in the following description, a stator core 3 may be illustrated in which the split cores 10, before being equipped with the insulator 81 and the coil 82, are arranged in the circumferential direction.

[0015] As shown in Fig. 2, the split core 10 has an arc-shaped portion 11 and a protruding portion 15 as a magnetic pole portion. Fig. 2 is a cross-sectional view showing an example of a split core in the first embodiment. The split core 10 is formed by stacking a plurality of steel plates as magnetic bodies in the Z-axis direction. Note that in the following drawings, the horizontal lines on the end faces that appear due to the stacking of electromagnetic steel plates may not be shown.

[0016] The arc-shaped portions 11 are located on the outer periphery in the radial direction (on the positive side of the X-axis in the split core 10B shown in FIG. 2) and extend in the circumferential direction (in the Y-axis direction shown in FIG. 2). The arc-shaped portions 11 form the outer periphery surface 11s of the stator core 3 on which the split cores 10 are arranged in an annular shape. Note that the arc-shaped portions 11 may have recesses 11r formed in the circumferential center thereof, recessed radially inward from the outer periphery surface 11s, for example, to adjust the flow of magnetic flux.

[0017] The protruding portion 15 extends radially inward from the circumferential center of the arc-shaped portion 11. A peripheral surface 15r extending in the circumferential direction is formed at the tip of the protruding portion 15. The peripheral surface 15r forms the inner peripheral surface of the magnetic pole portion of the stator core 3.

[0018] As shown in Fig. 3, the multiple split cores 10 have one end 16 and the other end 17 in the Z-axis direction, i.e., the rotation axis direction. Fig. 3 is a perspective view showing an example of a stator core according to the first embodiment. For the sake of explanation, the stator core 3 shown in Fig. 3 is an annular arrangement of multiple split cores 10 before the insulators 81 and coils 82 are attached. In reality, the multiple split cores 10 according to the first embodiment are annularly arranged after the insulators 81 and coils 82 are attached, and are then connected by a resin member as will be described later.

[0019] 2, portions 12p and 12q that come into contact with other circumferentially adjacent split cores 10 are formed at both circumferential ends of the arc-shaped portions 11 of the multiple split cores 10. For example, portion 12q of split core 10K shown in FIG. 3 comes into contact with portion 12p of split core 10L that is circumferentially adjacent to split core 10K.

[0020] In this case, recesses 13p and 13q (as another recess) are formed on the outer peripheral surface 11s of the contacting portion 12p and the contacting portion 12q (as another contacting portion). As shown in Fig. 2, recesses 13p and 13q are recessed radially inward from the outer peripheral surface 11s by a width G1. As shown in Fig. 3, recesses 13p and 13q extend from one end 16 to the other end 17 in the Z-axis direction.

[0021] 2, a recessed portion 14p is formed between the recessed portion 13p and the contacting portion 12p, the recessed portion 14p being recessed radially inward by a width G2 with respect to the outer peripheral surface 11s of the arc-shaped portion 11. Similarly, a recessed portion 14q is formed between the recessed portion 13q and the contacting portion 12q. In this configuration, between the recessed portions 13p and 13q adjacent in the circumferential direction, the recessed portions 14p and 14q recessed inward with respect to the outer peripheral surface 11s of the split core 10 also extend in the Z-axis direction from one end 16 to the other end 17, as shown in FIG.

[0022] Of the multiple split cores 10, one split core 10 is connected to another split core 10 adjacent to the one split core 10 by a resin member 20 including multiple portions 30a to 30l. For example, as shown in FIG. 4, the adjacent one split cores 10A and 10B are connected by portion 30a of the resin member 20. FIG. 4 is a top view showing an example of a stator core connected by a resin member in the first embodiment. In the first embodiment, the multiple portions 30a to 30l of the resin member 20 are formed so as not to contact each other in the circumferential direction.

[0023] The resin member 20 is formed, for example, by molding, in which the stator core 3, in which the split cores 10 are arranged circumferentially, is placed in a mold and a resin that becomes fluid when heated is injected. As shown in FIG. 4 , the resin member 20 fills and adheres to the recesses 13p and 13q of the split cores 10A and 10L, which are adjacent to each other in the circumferential direction, among the multiple split cores 10. In this case, the recess 13q is formed, for example, in another split core 10L adjacent to the split core 10A in the circumferential direction, and the recess 13p is formed in this split core 10A. The multiple recesses 13p and 13q are adjacent to each other in the circumferential direction, with the contacting portions 12p and 12q sandwiched between them. For example, the portion 30l of the resin member shown in FIG. 4 fills and adheres to the recess 13q of the split core 10L and the recess 13p of the split core 10A, spanning the recess 13q of the split core 10L and the recess 13p of the split core 10A. Hereinafter, the stator core 3 filled with the resin member 20 may be referred to as a connected stator core 4.

[0024] In this case, as shown in FIGS. 5 to 7, the resin member 20 is in close contact with the recesses 13p and 13q, connecting the split core 10 to another split core 10. FIG. 5 is a partially see-through perspective view showing an example of connected stator cores in the first embodiment. FIG. 6 is a side cross-sectional view showing an example of connected stator cores in the first embodiment. FIG. 7 is a cross-sectional view showing an example of connected stator cores in the first embodiment. FIG. 6 shows a cross-section taken along line AA in FIG. 4. FIG. 7 is an enlarged view of the portion indicated by frame F1 in FIG. 4. As shown in FIG. 6, the circumferential ends 33p and 33q of the resin member 20 are in close contact with the recesses 13p and 13q of the split core 10, respectively.

[0025] 5, the recesses 13p, 13q and the resin member 20 extend from one end 16 to the other end 17 of the split core 10 in the Z-axis direction, i.e., the rotation axis direction. In this case, one end 36 of the resin member 20 is formed to be substantially flush with one end 16 of the split core 10 and to form a surface continuous with the one end 16. Similarly, the other end 37 of the resin member 20 is formed to be substantially flush with the other end 17 of the split core 10 and to form a surface continuous with the other end 37. Note that the portion 30a of the resin member indicated by the dashed line in FIG. 5 is shown in a separated state for the sake of explanation, but in reality it is inseparably adhered to the split cores 10A and 10B shown in FIG. 4.

[0026] 7, an intermediate portion 34 located between the circumferential ends 33p and 33q of the resin member 20 also closely contacts the recessed portion 14p of the split core 10L and the (other) recessed portion 14q of the split core 10K. For example, in this configuration, as shown in FIGS. 5 to 7, the outer peripheral surface 31 of the resin member 20 is formed so as to be flush with the outer peripheral surface 11s of the split core 10 and to be continuous with the outer peripheral surface 11s of the split core 10. This prevents the outer peripheral surface 31 of the resin member 20 from protruding radially outward beyond the outer peripheral surface 11s of the split core 10 when the recesses 13p and 13q are filled with the resin member 20 to join two adjacent split cores 10.

[0027] The recesses 13p, 13q are formed at an angle relative to the radial direction. For example, as shown in FIG. 7, a line L1K extending from one circumferential end face of the recess 13q of the split core 10K intersects with a line L1L extending from the other end face of the recess 13p of the split core 10L adjacent to the split core 10K in the circumferential direction at a point X1 located radially outward from the center of the motor 1. Similarly, a line L2K extending from the other circumferential end face of the recess 13q of the split core 10K intersects with a line L2L extending from one end face of the recess 13p of the split core 10L adjacent to the split core 10K in the circumferential direction at a point X2 located radially outward from the center of the motor 1. That is, the recesses 13p, 13q are formed so that they extend radially inward, away from the protrusion 15, i.e., outward in the circumferential direction.

[0028] According to this configuration, the circumferential ends 33p and 33q of the filled resin member 20 shrink outward in the circumferential direction, i.e., in the direction of solidifying the two adjacent split cores 10, thereby making the bonding of the split cores 10 stronger.

[0029] As described above, the motor 1 in the first embodiment includes a plurality of split cores 10 arranged circumferentially. Recesses 13p, 13q are formed on the outer peripheral surfaces of the plurality of split cores 10. A resin member 20 is in close contact with the plurality of split cores 10, straddling the recesses 13p, 13q of the circumferentially adjacent split cores 10 and the other split cores 10. The resin member 20 connects the split cores 10 to the other split cores 10. The split core 10 includes a portion 12p that contacts the other split cores 10. The other split cores 10 include a portion 12q that contacts the split core 10. The outer peripheral surface of the contacting portion 12p of the split core 10 includes recesses 13p, which belong to the plurality of recesses 13p, 13q. The outer peripheral surface of the contacting portion 13q of the other split cores 10 includes other recesses 13q, which belong to the plurality of recesses 13p, 13q. In the motor 1, the volume occupied by the resin member 20 used to connect the split cores 10 can be reduced, thereby reducing costs and weight. In addition, the resin is prevented from flowing inward in the radial direction, and the magnetic path is prevented from being blocked by the resin on the outside in the radial direction, thereby improving motor characteristics.

[0030] [Second embodiment] The positions where resin is filled by molding are not limited to those shown in the first embodiment, and may be as shown in FIG. 8 and subsequent figures. FIG. 8 is a perspective view showing an example of coupled stator cores in a second embodiment. FIG. 9 is a side cross-sectional view showing an example of coupled stator cores in the second embodiment. FIG. 9 shows a cross section taken along line BB in FIG. 8. In the following embodiments and modifications, parts that are the same as those shown in the drawings described above are designated by the same reference numerals, and duplicated explanations will be omitted.

[0031] 8 and 9, the resin member A20 in the second embodiment includes a plurality of first portions A30 arranged in the recesses 13p and 13q of the connected stator core A4, as well as a second portion A40 extending in the circumferential direction and formed near the center in the Z axis direction. The resin member A20 may further include a third portion A50 filled in the recess A11r of the split core A10.

[0032] The resin member A20 in the second embodiment is also formed by, for example, molding. In this case, the first portion A30 has substantially the same shape as each of the portions 30a to 30l of the resin member 20 in the first embodiment. That is, the first portion A30 extends in the Z-axis direction from one end A16 to the other end A17 of the connected stator core A4. Similarly, the third portion A50 extends from one end 16 to the other end 17 of the split core A10. Furthermore, the second portion A40 is formed integrally with the first portion A30 and the third portion A50. The resin member A20 includes a plurality of first portions A30a to A30l.

[0033] As shown in FIG. 9, the connected stator core A4 has a peripheral surface (side surface) A18s that is recessed in the radial direction near the center in the Z-axis direction. At the recessed peripheral surface (side surface) A18s, the divided cores A10A to A10L have a cross-sectional shape as shown in FIG. 10. FIG. 10 is a cross-sectional view showing an example of a divided core in the second embodiment. FIG. 10 shows a cross-section of a divided core A10B in the second embodiment taken along line CC in FIG. 9. The divided core A10 in the second embodiment is formed by sandwiching, for example, a magnetic body having a cross-sectional shape as shown in FIG. 10 between magnetic bodies having a cross-sectional shape as shown in FIG. 2 on both sides in the Z-axis direction. In this case, the portions of the divided core A10 formed by the magnetic body having the cross-sectional shape as shown in FIG. 2 (portions on the positive and negative sides in the Z-axis direction) form the outer peripheral surface A11s of the connected stator core A4 shown in FIG. 9.

[0034] As shown in Fig. 10, near the center of the split core A10 in the Z axis direction, the recessed circumferential surface A18s is formed radially inward (toward the negative direction in the X axis direction shown in Fig. 10) by a width G11 from the outer circumferential surface A11s shown in Fig. 9. In this case, the recessed circumferential surface A18s is substantially flush with the recessed portions 14p and 14q, as shown in Figs. 10 and 11. Fig. 11 is a cross-sectional view showing an example of coupled stator cores in the second embodiment. Fig. 11 shows a cross section taken along line CC in Fig. 9.

[0035] According to this configuration, the resin forming the second portion A40 is filled between the outer peripheral surface A11s and the recessed outer peripheral surface A18s in the radial direction, so that the outer peripheral surface A41 of the second portion A40 is formed to be substantially flush with the outer peripheral surface A11s of the connected stator core A4 and to be continuous with the outer peripheral surface A11s. Furthermore, as shown in FIGS. 8 and 11, the third portion A50 filled in the recess A11r of the split core A10 is also substantially flush with the outer peripheral surface A11s of the connected stator core A4. In this case, as shown in FIG. 9, the length (radial size) W12 of the protruding portion A15 on the CC cross section is substantially equal to the length W11 of the protruding portion A15 at the end A17 minus the thickness (radial size) T12 of the second portion A40 of the resin member A20. Furthermore, the thickness T12 of the second portion A40 of the resin member A20 is approximately the same as the thickness T11 of the middle portion A34 of the first portion A30.

[0036] The recesses A13p, A13q, and A11r in the second embodiment are formed so that their radially inner surfaces are substantially flush with the recesses 13p, 13q, and 11r shown in Fig. 2. In this case, the depth G12 of the recesses A13p and A13q relative to the recessed portions 14p and 14q is substantially the same as the depth G3 of the recesses 13p and 13q relative to the recessed portions 14p and 14q shown in Fig. 2.

[0037] As described above, the resin member A20 in the second embodiment includes the portion A40 extending in the circumferential direction. With this configuration, the multiple first portions A30 are connected to each other by the second portions A40, which allows the split cores A10A to A10L to be connected more firmly.

[0038] [Variations] Although the configurations of the respective embodiments have been described above, the embodiments are not limited thereto. For example, while the examples have been described in which the recesses facing each other across the contact portion are shaped approximately line-symmetrically, the two recesses may be asymmetrical. Furthermore, the multiple split cores forming the connected stator core may include split cores with shapes different from the other split cores.

[0039] Furthermore, the circumferentially extending portion of the resin member may be formed in a portion other than the intermediate portion in the rotational axis direction, and the split cores 10 may be joined by a material other than a resin member. Fig. 12 is a perspective view showing an example of stator cores connected by a resin member in the first modified example. Fig. 13 is a side cross-sectional view showing an example of stator cores connected by a resin member in the first modified example. Fig. 13 shows a cross section taken along line DD in Fig. 12.

[0040] 12 and 13, in the coupled stator core B4 of the first modified example, the resin member B20 further includes a pair of annular portions B61 and B62 in addition to the first portion A30, the second portion A40, and the third portion A50 shown in the second embodiment. The pair of annular portions B61 and B62 are also an example of a portion of the resin member extending in the circumferential direction.

[0041] As shown in Fig. 13, the annular portion B61 is formed on the positive side of the Z axis, and the annular portion B62 is formed on the negative side of the Z axis. The annular portions B61 and B62 cover the first portion A30, the second portion A40, and the third portion A50 of the resin member B20 from both sides of the Z axis. In Fig. 12, the first portion A30, the second portion A40, and the third portion A50 are hidden by the annular portion B61 and are not visible. This configuration allows the split core A10 to be bonded even more firmly.

[0042] 14 and 15, the contacting portions A12p and A12q of the split core A10 may be welded. Fig. 14 is a perspective view showing an example of a stator core connected by a resin member in the second modified example. Fig. 15 is an enlarged cross-sectional view showing an example of a connected portion of the split cores in the second modified example. Fig. 15 shows a cross section taken along line EE in Fig. 14.

[0043] As shown in Fig. 14, the resin member C20 of the coupled stator core C4 in the second modified example includes a first portion C30, a second portion C40, and a third portion A50. Also, as shown in Fig. 15, in the second modified example, a welded portion C70 is formed between the contacting portion A12q of one split core A10 and the contacting portion A12p of an adjacent split core A10. This allows the split cores A10 to be joined even more firmly.

[0044] In the second modified example, as shown in Fig. 14, the welded contact portions A12p and A12q are formed at a position in the middle of the resin member C20 in the Z-axis direction, i.e., in the rotation axis direction. In this case, an opening may be formed at a position in the middle of the resin member C20 in the rotation axis direction. For example, as shown in Fig. 14, an opening C71 is formed at a position in the middle of the resin member C20 in the Z-axis direction, i.e., at the position where the first portion C30 and the second portion C40 intersect.

[0045] The portions to be welded are not limited to those described above, and may be other portions in the Z-axis direction, such as portions near end A16 or A17. Welding may also be performed at multiple locations in the Z-axis direction. Furthermore, a configuration in which opening C71 is not formed may also be used, such as when molding is performed after welding.

[0046] Furthermore, the embodiments and modifications may be combined as appropriate. For example, the stator 2 shown in the first embodiment may have the annular portions B61 and B62, and may also have the welded portion C70.

[0047] Furthermore, the shape of the protrusion 15 is not limited to that described above, and may be configured without the peripheral surface 15r extending in the circumferential direction. In such a configuration, for example, the insulator 81 and the coil 82 may be attached after the split cores are connected by a resin member.

[0048] Although the present invention has been described above based on the embodiments and modifications thereof, it goes without saying that the present invention is not limited to the embodiments and modifications thereof, and various modifications are possible without departing from the spirit of the present invention. Such modifications without departing from the spirit of the present invention are also included in the technical scope of the present invention, and this will be clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0049] 1 motor, 2 stator, 3 stator core, 4, A4, B4, C4 connected stator core, 10, 10A to 10L, A10 divided core, 11 arc-shaped portion, 11r, A11r recess, 11s, A11s outer peripheral surface, 12p, 12q, A12p, A12q contact portion, 13p, 13q, A13p, A13q recess, 14p, 14q recessed portion, 15, A15 protrusion, 16, A16 one end, 17, A17 other end, A18s recessed peripheral surface, 20, A20, B20, C20 resin member, 30a to 30l portions, 31 outer peripheral surface, 33p, 33q end, 34 middle portion, 36 one end, 37 other end, A30, C30 First part, A40, C40 Second part, A41 Outer periphery, A50 Third part, B61, B62 Annular part, C70 Welded part, C71 Opening, 81 Insulator, 82 Coil, 91 Frame, 92 Rotor, 99 Shaft

Claims

1. A plurality of divided cores are arranged in the circumferential direction, A plurality of recesses are formed on the outer circumferential surfaces of the plurality of split cores, a resin member is in close contact with the recesses of the divided cores adjacent to each other in the circumferential direction and the recesses of the other divided cores; the resin member connects the split core to the other split core, the split core has a portion that contacts the other split core, the other split core has a portion that contacts the split core, The recesses of the plurality of recesses are formed on the outer peripheral surfaces of the contacting portions of the split cores, Another recessed portion of the plurality of recessed portions is formed on the outer peripheral surface of the contacting portion of the other divided core. Motor.

2. The motor according to claim 1 , wherein the recessed portion is formed so as to be inclined with respect to a radial direction.

3. The plurality of split cores each have one end and the other end in the rotation axis direction, the plurality of recesses and the resin member extend from the one end to the other end in the rotation axis direction; The motor according to claim 1 .

4. an outer circumferential surface of the resin member is formed to be flush with the outer circumferential surface of the split core; one end and the other end of the resin member are formed to be substantially flush with one end and the other end of the split core, respectively; The motor according to claim 3.

5. 5. The motor according to claim 1, wherein the contacting portions are welded.

6. the welded contacting portion is located at a middle portion of the resin member in the rotation axis direction, an opening is formed at a position of a middle part of the resin member in the rotation axis direction; The motor according to claim 5.

7. The motor according to claim 1 , wherein the resin member has a portion extending in a circumferential direction.

Images