Motor

Abstract

To provide a motor capable of suppressing foreign matter from entering from outside to inside.SOLUTION: A motor includes a shaft 1 arranged along a vertically extending central axis, a stator attached to the shaft, and a lead wire 3 electrically connected to the stator. The shaft has a hole portion 10 extending from one side to the other side, a sealing member 20 arranged in at least one part of the hole portion, and a cover member 30. The hole portion has a first hole 11 opening on one side of the shaft, and a second hole 12 opening on the other side of the shaft and connected to the first hole, the lead wire is arranged inside the first hole and inside the second hole, the cover member is arranged in the opening of the first hole, and covers an outer surface of the lead wire, and the sealing member is arranged at a position on the other side of the arrangement position of the cover member.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

[0002] 2. Description of the Related Art Conventionally, motors having a fixed shaft are known. A stator is fixed to the fixed shaft. Lead wires are connected to the stator (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-311702 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, a fixed shaft having a through hole is used. A lead wire is inserted into the through hole. In a configuration using a fixed shaft having a through hole, there is a possibility that foreign matter may enter the inside of the motor from the outside through the through hole.

[0005] The present invention has an object to prevent foreign matter from entering the inside of a motor from the outside. [Means for solving the problem]

[0006] An exemplary motor of the present invention includes a shaft arranged along a central axis extending vertically, a stator attached to the shaft, and lead wires electrically connected to the stator. The shaft has a hole extending from one side to the other side, a sealing member arranged in at least a part of the hole, and a cover member. The hole has a first hole opening to one side of the shaft, and a second hole opening to the other side of the shaft and connected to the first hole. The lead wires are arranged inside the first hole and inside the second hole. The cover member is arranged at the opening of the first hole and covers the outer surface of the lead wire. The sealing member is arranged at a position on the other side of the position where the cover member is arranged. Effect of the Invention

[0007] According to the exemplary motor of the present invention, it is possible to prevent foreign matter from entering the inside of the motor from the outside. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the inside of a motor according to an embodiment. [Diagram 2] FIG. 2 is a perspective view of the shaft according to the embodiment as viewed from one side. [Diagram 3] FIG. 3 is a perspective view of the shaft according to the embodiment as viewed from the other side. [Figure 4] FIG. 4 is a partial cross-sectional view of a shaft according to an embodiment. [Diagram 5] FIG. 5 is a partial cross-sectional view showing a first hole and a second hole according to the embodiment. [Figure 6] FIG. 6 is an enlarged view showing a flange portion of a shaft according to the embodiment. [Figure 7] FIG. 7 is a perspective view of a cover member according to the embodiment. [Figure 8] FIG. 8 is a cross-sectional view of the cover member according to the embodiment. [Figure 9] FIG. 9 is a plan view of a cover member according to a modified example, as viewed from the cylinder axis direction. [Figure 10]FIG. 10 is an enlarged view showing a covering member according to an embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing a closing structure for a third hole according to the embodiment. [Figure 12] FIG. 12 is a cross-sectional view showing a closing structure for a third hole according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

[0010] In this specification, the direction parallel to the central axis CA of the motor 100 is referred to as the "axial direction," and the direction perpendicular to the central axis CA is referred to as the "radial direction." The shape and positional relationship of each part will be described with the axial direction being taken as the up-down direction. However, this definition of the up-down direction does not limit the orientation and positional relationship of the motor 100 when in use.

[0011] In addition, in this specification, the shape and positional relationship of each part will be described assuming that the left-right direction in Fig. 4 is the left-right direction of motor 100. However, this definition of the left-right direction does not limit the orientation and positional relationship of motor 100 when in use. In the following description, the radial right side of central axis CA in Fig. 4 will be referred to as "one side," and the radial left side of central axis CA in Fig. 4 will be referred to as "the other side."

[0012] <1. Motor Overview> FIG. 1 is a perspective view showing the inside of a motor 100 according to this embodiment.

[0013] The motor 100 according to this embodiment is integrated into the rear wheel of an electric motorcycle. In other words, the motor 100 is an in-wheel motor. The motor 100 includes a rim 101. A tire is attached to the rim 101.

[0014] The rim 101 is cylindrical and extends in the axial direction. The rim 101 has openings on the axially upper and lower sides. The axially upper and lower openings of the rim 101 are each covered by a cover (not shown). In addition, multiple magnets (not shown) are disposed on the inner peripheral surface of the rim 101. The multiple magnets are arranged in the circumferential direction centered on a central axis CA. The rim 101 rotates around the central axis CA.

[0015] In the following description, the area inside the radial inner side of the rim 101 is defined as the inside of the motor 100. Also, the area outside the radial inner side of the rim 101 is defined as the outside of the motor 100.

[0016] The motor 100 includes a shaft 1, a stator 2, and lead wires 3. The shaft 1 is disposed along a central axis CA that extends vertically. In other words, the rim 101 rotates around the axis of the shaft 1. The shaft 1 will be described in detail later.

[0017] The stator 2 is attached to the shaft 1. The stator 2 is disposed radially inside the rim 101. In other words, the stator 2 is disposed inside the motor 100. The outer peripheral surface of the stator 2 faces a plurality of magnets disposed on the inner peripheral surface of the rim 101 in the radial direction. The stator 2 rotates the rim 101.

[0018] The stator 2 includes a stator core (not shown), an insulator 201, and a coil portion 202. The stator core is an annular magnetic body centered on a central axis CA, and is a laminate in which multiple electromagnetic steel sheets are stacked in the axial direction. The insulator 201 is an insulating member made of a resin or the like. The insulator 201 covers at least a portion of the stator core. The coil portion 202 is a copper wire, and is wound around the stator core via the insulator 201.

[0019] The stator 2 further includes a circuit board 203. The circuit board 203 is attached to the insulator 201. The circuit board 203 is connected to the coil portion 202.

[0020] The lead wires 3 are electrically connected to the stator 2. Specifically, a plurality of lead wires 3 are connected to the stator 2. The plurality of lead wires 3 are bundled into one wire. Some of the lead wires 3 are connected to the circuit board 203, and the other lead wires 3 are connected to the coil portion 202. That is, the lead wires 3 have a portion that is disposed inside the motor 100.

[0021] Furthermore, the lead wires 3 are drawn from the inside of the motor 100 to the outside. That is, the lead wires 3 have a portion that is disposed outside the motor 100. The lead wires 3 are connected to a PDU (Power Drive Unit) (not shown) outside the motor 100. The PDU controls the driving of the motor 100. The PDU also controls the power supply to the motor 100.

[0022] <2. Shaft> FIG. 2 is a perspective view of the shaft 1 according to this embodiment when viewed from one side. FIG. 3 is a perspective view of the shaft 1 according to this embodiment when viewed from the other side. FIG. 4 is a partial cross-sectional view of the shaft 1 according to this embodiment. FIG. 5 is a partial cross-sectional view showing the first hole 11 and the second hole 12 according to this embodiment. Note that FIGS. 4 and 5 show the cross-sectional structure of the shaft 1 when the shaft 1 is cut along a plane including the central axis CA. FIG. 6 is an enlarged view showing the flange portion 110 of the shaft 1 according to this embodiment.

[0023] The shaft 1 has a hole 10, a sealing member 20, and a cover member 30. <2-1. Hole>

[0024] The hole portion 10 extends from one side to the other side. Here, the hole portion 10 has a first hole 11 and a second hole 12. Furthermore, the hole portion 10 has a third hole 13.

[0025] The first hole 11 opens to one side of the shaft 1. The opening of the first hole 11 is located in a flange portion 110. That is, the shaft 1 has a flange portion 110 in which the opening of the first hole 11 is located. The flange portion 110 is located inside the motor 100. Therefore, the opening of the first hole 11 is located inside the motor 100.

[0026] The second hole 12 opens to the other side of the shaft 1. The second hole 12 is connected to the first hole 11. That is, the hole portion 10 penetrates from one side to the other side. The lead wire 3 is disposed inside the first hole 11 and the second hole 12.

[0027] The second hole 12 has an opening at a position on the shaft 1 that is axially higher than the opening position of the first hole 11. Specifically, the opening of the second hole 12 is located at a portion of the shaft 1 that protrudes to the outside of the motor 100. In other words, the opening of the first hole 11 is located inside the motor 100, whereas the opening of the second hole 12 is located outside the motor 100. This allows the lead wire 3 to be drawn from the inside of the motor 100 to the outside through the hole portion 10.

[0028] The third hole 13 opens to the outer circumferential surface of the shaft 1. The third hole 13 is connected to the first hole 11. The inner diameter of the third hole 13 is smaller than the inner diameters of the first hole 11 and the second hole 12.

[0029] For example, third hole 13 serves as a resin injection hole in the step of injecting resin, which is a constituent material of sealing member 20, into first hole 11. For example, in the step of injecting resin into first hole 11, an injection nozzle is inserted into third hole 13. Then, resin is discharged from the injection nozzle.

[0030] Furthermore, for example, the third hole 13 is used to check the state of resin filling in the first hole 11. For example, if the third hole 13 is located axially above the first hole 11, when the first hole 11 is sufficiently filled with resin, the resin rises up and reaches the third hole 13. This makes it possible to visually check the resin rising up into the third hole 13 and check the state of resin filling in the first hole 11.

[0031] <2-2. Sealing member> The constituent material of the sealing member 20 includes resin. Silicone resin is used for the sealing member 20. Note that the use of resin as the constituent material of the sealing member 20 is merely an example. A wide variety of materials, such as adhesive, can be used as the constituent material of the sealing member 20. The sealing member 20 is disposed in at least a portion of the hole portion 10. Specifically, at least a portion of the sealing member 20 is disposed inside the first hole 11.

[0032] The sealing member 20 closes the gap between the inner circumferential surface of the first hole 11 and the outer surface of the lead wire 3 at least inside the first hole 11. That is, the sealing member 20 covers the outer surface of the lead wire 3. This makes it possible to prevent foreign matter from entering the hole portion 10 from reaching the inside of the motor 100 even if foreign matter enters the hole portion 10 from the opening of the second hole 12 outside the motor 100. Note that foreign matter includes liquids such as water. Foreign matter also includes dust such as dirt.

[0033] <2-3. Cover parts> In the following description, the direction parallel to the cylinder axis 30C of the cover member 30 will be referred to as the "cylinder axis direction."

[0034] The cover member 30 is called a grommet, for example. The cover member 30 is a member that is more elastically deformable than the shaft 1. For example, the cover member 30 is made of rubber. The cover member 30 is disposed at the opening of the first hole 11. In other words, the cover member 30 is disposed on the opening side of the first hole 11 within the first hole 11. In further words, the end 30a on one side and the end 30b on the other side of the cover member 30 are disposed inside the first hole 11. The end 30a on one side of the cover member 30 may be disposed inside the first hole 11, but may also protrude from the outer circumferential surface of the shaft 1. By using an elastically deformable member such as rubber as the cover member 30, when disposing the cover member 30 at the opening of the first hole 11, the operation of inserting the cover member 30 into the inside of the first hole 11 becomes easier.

[0035] The lead wire 3 is disposed inside the cover member 30. In other words, the cover member 30 covers the outer surface of the lead wire 3.

[0036] Here, a sealing member 20 and a cover member 30 are disposed inside the first hole 11. Specifically, the sealing member 20 is disposed at a position on the other side of the position where the cover member 30 is disposed.

[0037] In a configuration in which the sealing member 20 is disposed at a position on the other side of the position where the cover member 30 is disposed, when the resin, which is the constituent material of the sealing member 20, is injected into the first hole 11, first, the cover member 30 is disposed at the opening of the first hole 11. Then, the resin is injected into the first hole 11 from the third hole 13. At this time, the flow of the resin injected into the first hole 11 is blocked by the cover member 30.

[0038] That is, by disposing the cover member 30 at the opening of the first hole 11, when the resin, which is the constituent material of the sealing member 20, is injected into the first hole 11, it is possible to prevent the resin from leaking from the first hole 11. This makes it possible to reliably seal the inside of the first hole 11 with the sealing member 20. As a result, it is possible to reliably prevent foreign matter from entering the inside of the motor 100 from the outside.

[0039] The cover member 30 is cylindrical and has a through hole 31 extending from one side to the other side. The lead wire 3 is disposed inside the through hole 31. This allows the lead wire 3 to be drawn out from the first hole 11 via the through hole 31 even when the cover member 30 is disposed at the opening of the first hole 11.

[0040] <2-3-1. Detailed structure of the cover member> Fig. 7 is a perspective view of the cover member 30 according to this embodiment. Fig. 8 is a cross-sectional view of the cover member 30 according to this embodiment. Fig. 8 shows the cross-sectional structure of the cover member 30 when the cover member 30 is cut along a plane including the cylindrical axis 30C. Fig. 8 also shows the lead wire 3 disposed inside the cover member 30.

[0041] The cover member 30 has a gap 32. The gap 32 is connected to the through hole 31 from the outer peripheral surface of the cover member 30, and extends from the end 30a on one side of the cover member 30 to the end 30b on the other side. Specifically, the cover member 30 has a pair of end faces 32a and 32b that face each other at an interval in the circumferential direction centered on the cylindrical axis 30C. The region between the pair of end faces 32a and 32b forms the gap 32. This allows the lead wire 3 to be disposed inside the cover member 30 through the gap 32. As a result, the workability when disposing the lead wire 3 inside the cover member 30 is improved.

[0042] Moreover, the cover member 30 has an uneven inner peripheral surface. Specifically, the inner peripheral surface of the cover member 30 has a protruding portion 33 protruding in a direction perpendicular to the cylinder axis direction. Two protruding portions 33 are provided on the inner peripheral surface of the cover member 30. Each of the two protruding portions 33 protrudes in an annular shape in a direction perpendicular to the cylinder axis direction. The number of protruding portions 33 is not particularly limited. The number of protruding portions 33 may be one, or the number of protruding portions 33 may be two or more.

[0043] The protrusion 33 contacts the outer surface of the lead wire 3. When the lead wire 3 is inserted into the cover member 30, the cover member 30 elastically deforms radially outwardly perpendicular to the cylindrical axis direction. Therefore, after the lead wire 3 is inserted into the cover member 30, the lead wire 3 is biased radially inwardly perpendicular to the cylindrical axis direction by the protrusion 33. Therefore, the protrusion 33 and the outer surface of the lead wire 3 are in close contact with each other. This makes it possible to reliably block the through hole 31 with the lead wire 3. As a result, when the resin, which is the constituent material of the sealing member 20, is injected into the first hole 11, leakage of the resin through the through hole 31 can be suppressed.

[0044] <2-3-2. Modified Examples of Cover Member> FIG. 9 is a plan view of the cover member 30 according to the modified example, as viewed from the cylinder axis direction.

[0045] In the modified example, the cover member 30 has a gap 32 that connects from the outer peripheral surface to the through hole 31 and extends from the end 30a on one side to the end 30b on the other side. That is, the cover member 30 has a pair of end faces 32a and 32b. However, in the modified example, the pair of end faces 32a and 32b contact each other.

[0046] In the modified example, when the resin, which is the constituent material of the sealing member 20, is injected into the first hole 11, the resin can be prevented from leaking through the gap 32. Here, the cover member 30 is made of rubber. Therefore, when the lead wire 3 is disposed inside the cover member 30, the distance between the pair of end faces 32a and 32b can be easily increased. Therefore, it is possible to prevent a decrease in workability when disposing the lead wire 3 inside the cover member 30.

[0047] <2-4. Position of sealing member> 5, the sealing member 20 contacts the cover member 30 inside the first hole 11. The sealing member 20 is located on the other side of the arrangement position of the cover member 30. Therefore, the sealing member 20 contacts the end portion 30b of the cover member 30 on the other side.

[0048] Here, in the process of injecting the resin, which is the constituent material of the sealing member 20, into the first hole 11, when the resin is sufficiently filled into the first hole 11, after the resin hardens, the sealing member 20 comes into contact with the other end 30b of the cover member 30. That is, in the configuration in which the sealing member 20 comes into contact with the other end 30b of the cover member 30, the first hole 11 can be reliably blocked with the sealing member 20.

[0049] Moreover, the sealing member 20 reaches the second hole 12 from the first hole 11. That is, the sealing member 20 is disposed inside the second hole 12. Here, in the process of injecting the resin, which is the constituent material of the sealing member 20, into the first hole 11, when the resin is sufficiently filled into the first hole 11, the resin overflows from the first hole 11 and reaches the second hole 12. As a result, after the resin is cured, the sealing member 20 is disposed inside the second hole 12 in addition to the first hole 11. That is, in the configuration in which the sealing member 20 is disposed inside the second hole 12, the first hole 11 can be more reliably blocked by the sealing member 20.

[0050] <2-5. Covering materials> FIG. 10 is an enlarged view showing the covering member 40 according to the present embodiment.

[0051] The shaft 1 has a covering member 40. The covering member 40 is disposed on the flange portion 110. The covering member 40 contacts the outer peripheral surface of the shaft 1 and covers the opening of the first hole 11 and the opening of the third hole 13. In other words, the covering member 40 blocks the first hole 11 and the third hole 13 from the outside of the shaft 1. As a result, even if a foreign object enters the hole portion 10 from the opening of the second hole 12 outside the motor 100, the foreign object that has entered the hole portion 10 can be prevented from leaking out through the first hole 11. In addition, the foreign object that has entered the hole portion 10 can be prevented from leaking out through the third hole 13. The lead wire 3 drawn out from the first hole 11 passes through the covering member 40.

[0052] Moreover, the covering member 40 extends continuously from the opening position of the first hole 11 to the opening position of the third hole 13. That is, the opening of the first hole 11 and the opening of the third hole 13 are covered by the single covering member 40.

[0053] Here, the opening of the third hole 13 is located in the flange portion 110. That is, the opening of the first hole 11 and the opening of the third hole 13 are each located in the flange portion 110. For example, the axial position of the opening of the third hole 13 is substantially the same as the axial position of the opening of the first hole 11. Furthermore, the opening of the third hole 13 is located within a range from the position of the opening of the first hole 11 to a position shifted by an angle smaller than 90° in the circumferential direction around the central axis CA. This makes it possible to suppress an increase in the amount of material used for the covering member 40 even if the covering member 40 is continuously extended from the opening position of the first hole 11 to the opening position of the third hole 13.

[0054] Furthermore, by continuously extending the covering member 40 from the opening position of the first hole 11 to the opening position of the third hole 13, the contact area between the outer circumferential surface of the shaft 1 and the covering member 40 can be made larger than when the openings of the first hole 11 and the third hole 13 are individually covered. This makes it possible to prevent the covering member 40 from falling off the outer circumferential surface of the shaft 1.

[0055] The constituent material of the covering member 40 includes a resin. Silicone resin is used for the covering member 40. However, the constituent material of the covering member 40 includes a resin different from the constituent material of the sealing member 20. For example, the constituent material of the sealing member 20 is a low-viscosity resin. On the other hand, the constituent material of the covering member 40 is a high-viscosity resin having a higher viscosity than the constituent material of the sealing member 20. When a low-viscosity resin is used as the constituent material of the sealing member 20, the resin can be reliably filled inside the first hole 11 in the resin injection process into the first hole 11. When a high-viscosity resin is used as the constituent material of the covering member 40, dripping of the resin can be suppressed when the constituent material of the covering member 40 is applied to the outer circumferential surface of the shaft 1.

[0056] <2-6-1. Closure structure of the third hole> FIG. 11 is a cross-sectional view showing a closing structure of the third hole 13 according to this embodiment.

[0057] The sealing member 20 reaches the third hole 13 from the first hole 11. That is, the sealing member 20 is disposed inside the third hole 13. Here, in the process of injecting the resin, which is the constituent material of the sealing member 20, into the first hole 11, when the resin is sufficiently filled into the first hole 11, the resin overflows from the first hole 11 and reaches the third hole 13. As a result, after the resin hardens, the sealing member 20 is disposed inside the third hole 13 in addition to the first hole 11. That is, in the configuration in which the sealing member 20 is disposed inside the third hole 13, the third hole 13 can be reliably blocked.

[0058] The third hole 13 with the sealing member 20 disposed therein is further covered with the covering member 40. This makes it possible to more reliably close the third hole 13. However, the covering member 40 covering the third hole 13 may be omitted.

[0059] <2-6-2. Modified example of the blocking structure of the third hole> FIG. 12 is a cross-sectional view showing a closing structure of the third hole 13 according to a modified example.

[0060] In a variant, the shaft 1 has a blocking member 50. For example, the blocking member 50 is made of rubber. The blocking member 50 has a pin portion 51 and a flange portion 52.

[0061] The pin portion 51 is cylindrical. The pin portion 51 has a protrusion 51a. The protrusion 51a of the pin portion 51 protrudes radially outward from the pin portion 51. The pin portion 51 is inserted into the third hole 13 and disposed inside the third hole 13. The protrusion 51a of the pin portion 51 contacts the inner peripheral surface of the third hole 13. The flange portion 52 is disk-shaped and extends radially outward from the pin portion 51. The flange portion 52 contacts the outer peripheral surface of the shaft 1.

[0062] Thus, in the modified example, the blocking member 50 is disposed at the opening of the third hole 13 and covers the third hole 13. This makes it possible to block the third hole 13 more reliably.

[0063] In the modified example, the third hole 13 covered with the blocking member 50 is further covered with a covering member 40. Note that in the configuration of the modified example, the covering member 40 covering the third hole 13 may be omitted. Also, in the configuration of the modified example, a sealing member 20 may be disposed in at least a portion of the inside of the third hole 13.

[0064] <3.Other> The embodiments of the present invention have been described above. Note that the scope of the present invention is not limited to the above-mentioned embodiments. The present invention can be implemented by adding various modifications within the scope of the gist of the invention. In addition, the above-mentioned embodiments can be combined in any suitable manner.

[0065] For example, in the above-described embodiment, the present invention is applied to an in-wheel motor of an electric motorcycle, but it can be used for various purposes such as an electrically assisted bicycle. [Industrial Applicability]

[0066] The present invention can be used, for example, as an in-wheel motor for an electric motorcycle. [Explanation of symbols]

[0067] 1 Shaft 2 Stator 3 Lead Wire 10 hole 11 Hole 1 12 2nd hole 13 Hole 3 20 Sealing member 30 Cover member 30C tube shaft 30b end 31 Through hole 32 Gap 33 Protrusion 40 Covering material 50 Closure member 100 Motor 110 Flange part CA center axis

Claims

1. A shaft disposed along a central axis extending vertically; a stator attached to the shaft; A lead wire electrically connected to the stator; Equipped with The shaft is A hole extending from one side to the other side; a sealing member disposed in at least a portion of the hole; A cover member; having The hole portion is a first hole opening to the one side of the shaft; a second hole that opens to the other side of the shaft and is connected to the first hole; having the lead wire is disposed inside the first hole and inside the second hole, the cover member is disposed at an opening of the first hole and in close contact with an outer surface of the lead wire; The sealing member is disposed at a position on the other side of the position where the cover member is disposed.

2. The motor according to claim 1 , wherein the sealing member contacts the other end of the cover member.

3. the cover member is tubular and has a through hole extending from the one side to the other side, The cover member has a gap, the gap portion is connected from an outer peripheral surface of the cover member to the through hole and extends from the one end portion of the cover member to the other end portion of the cover member, The motor according to claim 1 , wherein the lead wire is disposed inside the through hole.

4. the cover member is tubular and has a through hole extending from the one side to the other side, The inner circumferential surface of the cover member has a protruding portion protruding in a direction perpendicular to the cylinder axis direction, the lead wire is disposed inside the through hole, The motor according to claim 1 or 2, wherein the protrusion contacts an outer surface of the lead wire.

5. The motor according to any one of claims 1 to 4, wherein the sealing member is disposed inside the second hole.

6. The hole portion has a third hole, The motor according to any one of claims 1 to 5, wherein the third hole is connected to the first hole and opens onto an outer circumferential surface of the shaft.

7. The motor of claim 6 , wherein the sealing member is disposed within the third hole.

8. The shaft has a closure member. The motor according to claim 6 or 7, wherein the blocking member is disposed at an opening of the third hole and covers the third hole.

9. the shaft has a covering member; The motor according to any one of claims 6 to 8, wherein the covering member contacts an outer circumferential surface of the shaft and covers an opening of the first hole and an opening of the third hole.

10. a constituent material of the sealing member includes a resin, The motor according to claim 9 , wherein a constituent material of the covering member includes a resin different from a constituent material of the sealing member.

11. The shaft has a flange portion in which an opening of the first hole is located, The motor according to any one of claims 6 to 10, wherein an opening of the third hole is located in the flange portion.

12. A motor as described in any one of claims 6 to 11, wherein the opening of the third hole is located within a range from the position of the opening of the first hole to a position offset by an angle of less than 90° in a circumferential direction around the central axis.

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