Motor and blower device

Abstract

Provided are a motor and a blower device having a shaft (rotational axis) of which perpendicularity is increased easily in a simple configuration. A motor 100 is provided with: a shaft (1); a top plate portion (2A) fixed to one end of the shaft (1) and extending perpendicularly to the axial direction of the shaft (1); a bearing (4) fixed to the shaft (1); a tubular sleeve (5) housing the bearing (4); a stator (6) fixed to the outer periphery of the sleeve (5); and a rotor (3) surrounding the stator (6). The top plate portion (2A) and the rotor (3) are fixed together, and the top plate portion (2A) has a hole portion (20a) opening toward an end portion of the sleeve (5) on the top plate portion (2A) side in the axial direction of the shaft (1).

Description

Technical Field

[0001] The present invention relates to a motor and a blower device.

Background Art

[0002] Conventionally, a so-called outer rotor type motor including a shaft, a bearing fixed to the shaft, a cylindrical sleeve that houses the bearing, a stator fixed to the outer peripheral portion of the sleeve, a rotor hub fixed to one end of the shaft that surrounds the stator, and a case that houses these, and a blower device in which an impeller is fixed to the rotor hub are known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In motors and blower devices as described above, during assembly, the sleeve and the case are fixed with an adhesive or the like. However, in the case of fixing with an adhesive, in order to ensure the perpendicularity of the shaft (rotating shaft), it is required that there is no gap at the fixing portion between the two, and there are concerns that high mounting accuracy is required or the mounting work becomes complicated.

[0005] Therefore, in view of the above background, an object of the present invention is to provide a motor and a blower device that have a simple configuration and can easily improve the perpendicularity of the shaft (rotating shaft).

Means for Solving the Problems

[0006] The above object is achieved by the following present invention. That is, as one aspect of the motor of the present invention, there are a shaft and, a top plate portion fixed to one end of the shaft and extending in a direction perpendicular to the axial direction of the shaft, a bearing fixed to the shaft, a cylindrical sleeve for housing the bearing, a stator fixed to the outer peripheral portion of the sleeve, a rotor surrounding the stator, and are provided with, the top plate portion and the rotor are fixed, the top plate portion is provided with a hole portion that opens toward the end portion of the sleeve on the top plate portion side in the axial direction of the shaft.

[0007] In the motor of the present invention, it is preferable that the top plate portion and the rotor are integrated to form a hub. the sleeve has a flange portion extending in a direction perpendicular to the axial direction of the shaft at the end portion on the top plate portion side, the hole portion can be made to open toward the flange portion in the axial direction of the shaft.

[0008] In the motor of the present invention, the sleeve can have a convex portion that projects in a direction perpendicular to the axial direction of the shaft on the top plate portion side of the stator and engages with the stator. the bearing has at least a first bearing located closer to one end side of the shaft where the top plate portion is fixed and a second bearing located closer to the other end side opposite to the one end side, it is preferable that at least the sleeve, the first bearing, and the second bearing constitute one cartridge member.

[0009] In the motor of the present invention, a case for housing all or part of other constituent members inside is provided, the inner surface of the case has a first cylindrical portion standing upright in the inner direction, The sleeve can be fixed to the case by fitting and fixing the end of the sleeve opposite to the top plate portion into the first cylindrical portion.

[0010] In the motor of the present invention, at the center of the top plate portion, there is a second cylindrical portion standing on the sleeve side, The top plate portion can be fixed to the shaft by fitting and fixing one end of the shaft into the second cylindrical portion.

[0011] In the motor of the present invention, at the center of the top plate portion, there is a second cylindrical portion standing on the sleeve side, The top plate portion is fixed to the shaft by fitting and fixing one end of the shaft into the second cylindrical portion, Either one or both of the first cylindrical portion, the end of the sleeve opposite to the top plate portion, the second cylindrical portion, and one end of the shaft can be fixed by press-fitting or a fixing method including press-fitting.

[0012] As an aspect of the motor of the present invention, a shaft, A top plate portion fixed to one end of the shaft and extending in a direction perpendicular to the axial direction of the shaft, A bearing fixed to the shaft, A cylindrical sleeve for accommodating the bearing, A stator fixed to the outer periphery of the sleeve, A rotor surrounding the stator, A case for accommodating all or part of other components inside, Comprising, The top plate portion and the rotor are fixed, On the inner surface of the case, there is a first cylindrical portion standing in the inner direction, At the center of the top plate portion, there is a second cylindrical portion standing on the sleeve side, The first cylindrical portion, the end portion of the sleeve opposite to the top plate portion, the second cylindrical portion, and one end of the shaft are all fixed by press-fitting or a fixing method including press-fitting.

[0013] As one aspect of the blower device of the present invention, it has the motor and an impeller fixed to the top plate portion.

Effect of the Invention

[0014] According to the present invention, it is possible to provide a motor that has a simple configuration and can easily improve the perpendicularity of the shaft (rotating shaft).

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0016] Hereinafter, a motor and a blower device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a blower device 101 to which a motor 100 according to an embodiment is applied, and FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1.

[0017] In the description of the present embodiment, when referring to "upward to downward", it means the vertical relationship in FIG. 2, and does not necessarily coincide with the vertical relationship in the gravitational direction. Also, in the description of the present embodiment, when referring to "left to right", it means the left - right relationship in FIG. 2. The same applies to all drawings other than FIG. 2.

[0018] In the following description, an example in which the motor 100 according to the present embodiment is applied to a blower device 101 that discharges the air sucked by rotating the impeller 22 will be described. The motor 100 of the blower device 101 includes a shaft 1, a hub 2 fixed to one end of the shaft 1, a bearing 4 fixed to the shaft 1, a cylindrical sleeve 5 that houses the bearing 4, a stator 6 fixed to the outer peripheral portion of the sleeve 5, and a case 7 that houses these constituent members inside.

[0019] The shaft 1 is located at the center when viewed from above the motor 100 and extends in the vertical direction. The shaft 1 is formed of, for example, aluminum for weight reduction. A hub 2 is fixed to one end (the upper end in FIG. 2) of the shaft 1. The shaft 1 and the hub 2 are fixed by a shaft mounting member 23 that forms a part of the hub 2. In the present embodiment, when referring to the "circumferential direction", it means the circumferential direction of a circle centered on the rotation axis X of the shaft 1.

[0020] The hub 2 includes a resin - made cup portion 21 having an overall cup shape, a cup - shaped yoke 31 fitted into the cup of the cup portion 21, a magnet 32 attached to the inner peripheral surface of the yoke 31 so as to surround the stator 6, and an impeller 22 fixed to the outer peripheral surface of the cup portion 21. Note that the yoke 31 and the magnet 32 among these constitute the rotor 3.

[0021] Further, the hub 2 is fixed to one end of the shaft 1 from its shaped surface, and includes a top plate portion 2A that extends in a direction perpendicular to the axial direction (rotation axis X direction) of the shaft 1, a cylindrical portion 2B that is a cylindrical body coaxial with the rotation axis direction X, and a frustum-shaped frustum portion 2C that connects the outer periphery of the top plate portion 2A and the upper end of the cylindrical portion 2B. The top plate portion 2A, the cylindrical portion 2B, and the frustum portion 2C all have a laminated structure of two or more layers basically including a cup portion 21 and a yoke 31.

[0022] In the top plate portion 2A of the cup portion 21, a concave portion 21a that is recessed from the inner side to the upper side is provided. A part of a mounting member of the shaft 1 (hereinafter referred to as the "shaft mounting member") described later is accommodated in this concave portion 21a.

[0023] In the top plate portion 2A, a plurality (three in this embodiment) of circular tubular holes 20a that open toward the end portion of the top plate portion 2A side of the sleeve 5 (flange portion 51 described later) in the rotation axis X direction are provided. The holes 20a are provided parallel to the rotation axis X and communicate the space outside the blower device 101 with the space inside the hub 2.

[0024] Further, the top plate portion 2A has a welded portion 20b in which a part of the inner peripheral surface of the hub 2 is inserted into a hole 30a formed in the yoke 31 and welded to the inner wall portion 31d of the yoke 31. By this welded portion 20b, the rotor 3 including the top plate portion 2A and the yoke 31 is fixed and integrated to form the hub 2.

[0025] In the frustum portion 2C, a plurality of holes 20c that communicate the space outside the blower device 101 with the space inside the hub 2 are provided. The holes 20c are configured to generate an air flow inside the hub 2 by the rotation of the impeller 22.

[0026] The yoke 31 has a circular opening 31a formed at the center of the top plate portion 2A, and a shaft mounting member 23, which will be described later, is fitted and fixed in this circular opening 31a. The yoke 31 is formed of a magnetic material, but may be formed of a non-magnetic material such as aluminum if there are no problems in terms of characteristics.

[0027] On the other hand, the magnet 32 is attached to the inner peripheral surface of the yoke 31 in the cylindrical portion 2B so as to face the stator 6. The magnet 32 has an annular shape, and regions magnetized to the N pole and regions magnetized to the S pole are alternately provided at regular intervals along the circumferential direction.

[0028] The shaft mounting member 23 is composed of a cylindrical second cylindrical portion (hereinafter, the second cylindrical portion is referred to as the "mounting member cylindrical portion") 23a and annular portions 23b and 23c. One end (upper end) of the shaft 1 is fixed to the inside of the mounting member cylindrical portion 23a by press fitting.

[0029] The annular portions 23b and 23c are provided so as to project in a direction away from the rotation axis X at positions spaced apart from each other in the direction of the rotation axis X on the outer peripheral surface of the mounting member cylindrical portion 23a. The edge of the circular opening 31a of the yoke 31 is sandwiched between the annular portion 23b and the annular portion 23c. That is, the annular portion 23b and the annular portion 23c are separated by approximately the same length as the thickness of the yoke 31.

[0030] The top plate portion 2A side of the mounting member cylindrical portion 23a and the annular portion 23b are accommodated in the concave portion 21a of the top plate portion 2A. On the other hand, the annular portion 23b and the lower (bearing 4) side of the mounting member cylindrical portion 23a are accommodated inside the yoke 31.

[0031] The shaft 1 is fixed while being fitted into the bearing 4. The bearing 4 has two bearings, a first bearing 41 and a second bearing 42, which are attached to the shaft 1 at a certain interval. The first bearing 41 is located closer to the upper side (one end side) where the top plate portion 2A is fixed on the shaft 1. Also, the second bearing 42 is located closer to the lower side (the other end side opposite to the one end side).

[0032] The bearings 41 and 42 are so-called ball bearings, which consist of outer rings 41a and 42a, inner rings 41b and 42b, and balls (bearing balls) 41c and 42c interposed between the outer rings 41a, 42a and the inner rings 41b, 42b. By the balls 41c rolling between the outer ring 41a and the inner ring 41b, the rotational resistance of the inner ring 41b with respect to the outer ring 41a is significantly reduced. The bearing 41 is formed of a hard metal such as iron or a ceramic member due to its function. The shaft 1 is fixed to the inner rings 41b and 42b and is rotatable with respect to the outer rings 41a and 42a.

[0033] The bearings 41 and 42 are housed in a sleeve 5. The sleeve 5 is a member having a cylindrical (particularly circular cylindrical) shape and is formed of, for example, plastic or metal. The sleeve 5 has a flange portion 51 provided at the end on the top plate portion 2A side and a convex portion 52 provided on the outer peripheral surface 5c.

[0034] The flange portion 51 extends in a direction perpendicular to the rotational axis line X from the end on the top plate portion 2A side of the sleeve 5. A hole portion 20a is located above (the top plate portion 2A) the flange portion 51. That is, the flange portion 51 extends from the upper end of the sleeve 5 so as to be located on the axis along which the tube constituting the hole portion 20a extends.

[0035] The convex portion 52 projects in a direction perpendicular to the rotational axis line X from the outer peripheral surface 5c of the sleeve 5 and is in contact with the top plate portion 2A side (upper side) of the stator core 61 of the stator 6 described later. On the inner peripheral surface of the sleeve 5, there are a protruding portion (small-diameter inner peripheral portion) 53 whose central portion on the rotation axis L protrudes toward the rotation axis L, and a concave portion (large-diameter inner peripheral portion) 54 whose both sides on the rotation axis L are recessed in a direction away from the rotation axis L. Hereinafter, the protruding portion 53 will be referred to as the small inner diameter portion 53, and the concave portion 54 will be referred to as the large inner diameter portion 54.

[0036] Note that the sleeve 5 may be integrally formed by a known method so as to have a shape having a small inner diameter portion 53 and a large inner diameter portion 54. For example, inside a large-diameter circular pipe (hereinafter referred to as a "large-diameter circular pipe") having the inner diameter and outer diameter of the large inner diameter portion 54, a small-diameter circular pipe (hereinafter referred to as a "small-diameter circular pipe") having the same inner diameter as the inner diameter of the small inner diameter portion 53 and the same outer diameter as the inner diameter of the large inner diameter portion 54 is inserted, and the small-diameter circular pipe is positioned substantially at the center of the large-diameter circular pipe in the direction of the rotation axis L, and the sleeve 5 may be formed of two or more members. At this time, the small-diameter circular pipe may be formed of a member different from the large-diameter circular pipe, and for example, an elastic member such as a spiral spring can be used.

[0037] The outer rings 41a, 42a of the two bearings 41, 42 are respectively fitted into and fixed to the two large inner diameter portions 54 of the sleeve 5, and are supported by the sleeve 5. On the other hand, the shaft 1 is fitted into and fixed to the inner rings 41b, 42b of the two bearings 41, 42, and is supported by the two bearings 41, 42. Therefore, the shaft 1 is supported so as to be rotatable with respect to the sleeve 5.

[0038] In the present embodiment, the sleeve 5, the first bearing 41, and the second bearing 42 constitute one cartridge member. By making the cartridge member in a state where the first bearing 41 and the second bearing 42 are assembled to the sleeve 5 in advance into one part, the assembly work becomes easy during manufacturing. Further, for example, when the bearing 4 is damaged, it is only necessary to replace the entire cartridge member, so the replacement work is easy, and the repair can be performed with an easy operation, which also leads to cost reduction.

[0039] In addition, it is relatively easy to adjust the rotational balance in the state of the cartridge member at the stage where the number of parts is small. Therefore, by adjusting the rotational balance in the state of the cartridge member, when manufacturing or repairing the motor, or after manufacturing or repairing, the work of rotational balance can be omitted, or can be completed with simple work, and the manufacturing or repairing work can be simplified. Therefore, also in this respect, there is a possibility of leading to cost reduction.

[0040] The cartridge member can be composed of at least three parts: the sleeve 5, the first bearing 41, and the second bearing 42. Further, in a state where the shaft 1 is inserted and fixed into the bearing 4, one cartridge member may be configured. By using the cartridge member in a state where the shaft 1 is incorporated into the three parts, the adjustment of the rotational balance in the state of the cartridge member can be carried out more accurately, and the manufacturing or repair work can also be made easier.

[0041] One end of the sleeve 5 on the side opposite to the top plate portion 2A (lower side) is fitted and fixed to the cylindrical portion of the case 7, which will be described in detail later, so that the sleeve 5 is fixed to the case 7. The shaft 1 supported by the sleeve 5 is supported so as to be rotatable with respect to the case 7, and the rotational force of the motor 100 can be taken out.

[0042] The stator 6 surrounding the sleeve 5 has a stator core 61, a coil 62, and an insulator 63. The stator 6 is fixed to the sleeve 5 by engaging the inner peripheral side with the convex portion 52 of the sleeve 5. The stator core 61 is a laminated body such as an annular silicon steel sheet arranged coaxially with the shaft 1.

[0043] The coil 62 is wound around the stator core 61. The stator core 61 and the coil 62 are insulated by an insulator 63 formed of an insulator. Note that instead of the insulator 63, an insulating film may be coated on the surface of the stator core 61 to insulate it from the coil 62. The substrate 8 is fixed to the end portion 63b on the side opposite to (the lower side of) the top plate portion 2A of the insulator 63.

[0044] The case 7 has a side wall portion 71 surrounding the hub 2 and a bottom wall portion 72 located at a part of an opening on one side (lower side) of the side wall portion 71. The case 7 is formed of, for example, a resin material or a metal material. In the internal space of the case 7, not only the rotor 3 and the stator 6, but also almost all (all the fixed ones) of the components of the motor 100 and the blower 101 such as the hub 2 are accommodated.

[0045] The case 7 has a cylindrical first cylindrical portion (hereinafter, the first cylindrical portion is referred to as the "case cylindrical portion") 73 standing upright from its inner surface in the internal direction. The case cylindrical portion 73 stands upright from the bottom wall portion 72 toward the top plate portion 2A side and is integrally formed with the bottom wall portion 72 by insert molding a sleeve member having a cylindrical shape made of metal into the case 7. Above the case 7, an air outlet 74 opened in a circular shape is provided. By making the case cylindrical portion 73 made of metal, when the sleeve 5 is press-fitted, the strength of the case 7 can be improved and the press-fitting can be performed more stably. However, it is not limited to being made of metal, and a separate member formed of resin, ceramics, or the like may be integrally formed, or may be integrally formed with the case 7. In that case, weight reduction and man-hour reduction can be achieved. Inside the case cylindrical portion 73, the end portion on the side opposite to (the lower side of) the top plate portion 2A of the sleeve 5 is fixed by press-fitting. By fixing the end portion of the sleeve 5 to the case cylindrical portion 73, the sleeve 5 is fixed to the case 7.

[0046] On the outer peripheral surface of the case cylindrical portion 73, a recessed portion (notched cutout portion) 73a is formed so that the outer diameter becomes narrower in a certain region from the end portion (upper end portion) on the top plate portion 2A side toward the bottom wall portion 72 side. The end portion 63b of the insulator 63 and the inner peripheral surface of the substrate 8 are located in the cutout portion 73a.

[0047] The bottom wall portion 72 is provided with an air inlet (not shown) that communicates the space inside the case 7 with the space outside the case 7 and sucks air into the case 7. Note that the air inlet in the bottom wall portion 72 may be a hole that communicates the space inside the case 7 with the space outside the case 7, or may be formed of a material such as a mesh.

[0048] When a predetermined voltage is applied from an external power source (not shown) to the blower device 101 having the motor 100 described above, a controlled current is supplied to the coil 62 via the substrate 8. Then, due to the action between the magnetic force generated by the stator 6 and the magnet 32, the impeller 22 rotates around the rotation axis X, for example, clockwise. As the impeller 22 rotates, the air around the air inlet of the bottom wall portion 72 is sucked into the case 7 through the air inlet. Then, the air is blown out from the upper air outlet 74.

[0049] Next, a method for assembling the motor 100 of the present embodiment and the blower device 101 to which this is applied will be described. FIG. 3 is an exploded cross-sectional view of the blower device 101 shown in FIG. 2. FIG. 4 is a cross-sectional view for explaining an operation of fixing the shaft 1 to the hub 2. FIG. 5 is a cross-sectional view for explaining an operation of fixing the state shown in FIG. 4 to the case 7.

[0050] To assemble the blower device 101, first, as shown in FIG. 3, the bearing 4 is fixed inside the sleeve 5. The bearing 4 is fixed to the sleeve 5 by fitting the outer rings 41a, 42a of the bearings 41, 42 into the large inner diameter portion 54, respectively. After fixing the bearing 4 inside the sleeve 5, the shaft 1 is inserted into this bearing 4, thereby fixing the shaft 1 inside the sleeve 5 and assembling the cartridge member C. Note that the cartridge member C may be assembled in another place in advance.

[0051] Next, this cartridge member C is fixed inside the stator 6. The fixing of the cartridge member C to the stator 6 is achieved by applying an adhesive to the outer peripheral surface 5c of the sleeve 5 and inserting the sleeve 5 into the interior of the stator core 61 in the direction of arrow D1.

[0052] Also, the insertion of the sleeve 5 into the stator 6 is carried out until the convex portion 52 of the sleeve 5 comes into contact with the top plate portion 2A side (upper side) of the stator core 61 of the stator 6. At this time, the stator 6 holds the insulator 63 and the cartridge member C is inserted. Then, by pressing the flange portion 51 in the direction of arrow D1, the stator 6 is fixed to the outer periphery of the sleeve 5.

[0053] Next, as shown in FIG. 4, the shaft 1 is fixed to the top plate portion 2A of the hub 2. The fixing of the shaft 1 to the top plate portion 2A is performed by press-fitting the upper end of the shaft 1 into the interior of the attachment member cylindrical portion 23a of the shaft attachment member 23 in the direction of arrow D2. At this time, while holding the hub 2 side, the cartridge member C is inserted by pressing the lower end portion of the shaft 1 in the direction of arrow D2. Note that the fixing of the shaft 1 to the top plate portion 2A may be performed by applying an adhesive to the interior of the attachment member cylindrical portion 23a and using both press-fitting and the adhesive. Also, in addition to fixing by the adhesive, fixing by welding or the like may be used in combination with press-fitting to increase the strength. When the shaft 1 is fixed to the top plate portion 2A of the hub 2, the hole portion 20a is located on the top plate portion 2A side of the flange portion 51.

[0054] Then, as shown in FIG. 5, the end portion of the sleeve 5 on the side opposite to the top plate portion 2A (lower side) is press-fitted into the interior of the case cylindrical portion 73 to fix the end portion of the sleeve 5 to the case cylindrical portion 73. The press-fitting of the sleeve 5 into the case cylindrical portion 73 of the sleeve 5 is performed by inserting a rod-shaped jig (not shown) from above downward into the hole portion 20a of the top plate portion 2A and pressing the flange portion 51 of the sleeve 5 in the direction of arrow D4. For the fixing of the sleeve 5 to the case cylindrical portion 73, an adhesive may be applied inside the case cylindrical portion 73, and it may be performed by both press-fitting and the adhesive. In addition to the fixing by the adhesive, in addition to press-fitting, fixing by welding or the like may be used in combination to increase the strength. The jig (not shown) is a comb-shaped blade having three rod-shaped bodies that can simultaneously insert the rod-shaped bodies from the three hole portions 20a and simultaneously press the flange portion 51.

[0055] When the sleeve 5 is pressed against the case cylindrical portion 73, the end portion 63b of the insulator 63 and the inner peripheral portion of the substrate 8 are in a state of being located in the notch portion 73a of the case cylindrical portion 73. In this way, in the blower 101 of the present embodiment, both the mounting member cylindrical portion 23a of the shaft mounting member 23 and the upper end of the shaft 1, and the case cylindrical portion 73 and the lower end portion of the sleeve 5 are fixed by press-fitting.

[0056] In the present embodiment, the top plate portion 2A is provided with a hole portion 20a that opens toward the end portion on the top plate portion 2A side of the sleeve 5 in the rotational axis X direction of the shaft 1. For this reason, by inserting a jig into the hole portion 20a and pressing the sleeve 5 downward, the lower end portion of the sleeve 5 can be fixed to the case cylindrical portion 73 by press-fitting. In this way, since the lower end portion of the sleeve 5 can be fixed by press-fitting, a gap between the sleeve 5 and the case cylindrical portion 73 is less likely to occur, and the perpendicularity of the shaft 1 can be increased. That is, in a fixing method such as adhesion that does not rely on press-fitting, there is a concern that the shaft 1 may be inclined due to product variations, processing conditions, assembly conditions, etc. However, in the present embodiment, since it is fixed by press-fitting, it is easy to increase the perpendicularity.

[0057] In addition, in the present embodiment, the sleeve 5 has a flange portion 51 that extends in a direction perpendicular to the rotation axis X of the shaft 1 at the end on the top plate portion 2A side, and the hole portion 20a opens toward the flange portion 51 in the rotation axis X direction of the shaft. Therefore, when a jig is inserted into the hole portion 20a and the sleeve 5 is pressed downward, the sleeve 5 can be easily press-fitted into the case cylindrical portion 73 by abutting the jig against the flange portion 51 and pressing the sleeve 5 downward.

[0058] Furthermore, in the present embodiment, the sleeve 5 has a convex portion 52 that projects in a direction perpendicular to the rotation axis X of the shaft 1 on the top plate portion 2A side of the stator 6 and contacts the stator 6. Therefore, the stator 6 can be positioned with respect to the sleeve 5 by inserting the stator 6 until the top plate portion 2A side (upper side) of the coil 62 contacts the convex portion 52.

[0059] In addition, in the present embodiment, the sleeve 5, the first bearing 41, and the second bearing 42 constitute one cartridge member C. Therefore, the assembly work during manufacturing becomes easier. Also, for example, when the bearing 4 is damaged, it is only necessary to replace the entire cartridge member C, so the replacement work is easy, and the repair can be performed with easy work, leading to cost reduction.

[0060] Furthermore, in the present embodiment, the inner surface of the case 7 has a first cylindrical portion (case cylindrical portion 73) erected in the inner direction, and the end of the sleeve 5 opposite to the top plate portion 2A is fitted and fixed to the case cylindrical portion 73, so that the sleeve 5 is fixed to the case 7. When fixing the sleeve 5 to the case cylindrical portion 73, the sleeve 5 can be easily press-fitted into the case cylindrical portion 73 and firmly fixed to the case cylindrical portion 73 by inserting a jig into the hole portion 20a and pressing the sleeve 5 downward.

[0061] In this embodiment, at the center of the top plate portion 2A, there is a second cylindrical portion (mounting member cylindrical portion 23a) erected on the side of the sleeve 5, and one end of the shaft 1 is fitted and fixed to the mounting member cylindrical portion 23a, whereby the top plate portion 2A is fixed to the shaft 1. Therefore, even though the top plate portion 2A is fixed to the shaft 1, the sleeve 5 can be fixed to the case cylindrical portion 73 by inserting a jig into the hole portion 20a and pressing the sleeve 5 downward.

[0062] Also, in this embodiment, both the end of the first cylindrical portion (case cylindrical portion 73) on the side opposite to the top plate portion 2A of the sleeve 5 and the end of the second cylindrical portion (shaft mounting member 23) and one end (upper end) of the shaft are fixed by press-fitting. Therefore, when assembling the motor 100, the mounting work becomes easier compared to the case where both are fixed with an adhesive. Also, since it is fixed by press-fitting, a gap is less likely to occur between the case cylindrical portion 73 and the sleeve 5, and between the shaft mounting member 23 and the shaft 1, and the perpendicularity of the shaft 1 can be increased.

[0063] As described above, the preferred embodiments of the motor and the blower of the present invention have been described. However, the motor of the present invention is not limited to the configuration of the above embodiment. For example, in the motor 100 and the blower 101 of the above embodiment, the case where the sleeve 5 has the flange portion 51 has been described, but a configuration without the flange portion 51 may also be used. When there is no flange portion 51, the hole portion 20a is configured to open toward the upper end portion of the sleeve 5, and the sleeve 5 can be press-fitted into the case cylindrical portion 73 by inserting a jig into the hole portion 20a and bringing it into contact with and pressing the upper end portion of the sleeve 5.

[0064] In addition, in the above-described embodiment, the case where the top plate portion 2A is provided with the hole portion 20a that opens toward the flange portion 51 of the sleeve 5, and the conical frustum portion 2C is provided with the hole portion 20c that communicates the space outside the blower device 101 and the space inside the hub 2 has been described. However, for example, only the hole portion 20a may be provided, and the configuration may be such that the hole portion 20c is not provided. That is, the hole portion 20a may be configured to have both the function of inserting a jig and the function of generating an air flow.

[0065] Furthermore, the top plate portion 2A may be configured without the hole portion 20a. Explaining from the state of FIG. 5, after the upper end of the shaft 1 is press-fitted and fixed to the attachment member cylindrical portion 23a, for example, a jig having a hook portion at the tip is inserted from the opening (air inlet) of the bottom wall portion 72 of the case 7, and the hook portion is hooked on the flange portion 51 of the sleeve 5 to pull down the hub 2 downward, whereby the lower side of the sleeve 5 can be press-fitted into the case cylindrical portion 73. By this method as well, any of the attachment member cylindrical portion 23a of the shaft attachment member 23 and the upper end of the shaft 1, and the case cylindrical portion 73 and the lower end portion of the sleeve 5 can be press-fitted.

[0066] Furthermore, in the above-described embodiment, the case where the top plate portion 2A includes the cup portion 21 and the yoke 31 has been described. However, the yoke 31 may not be cup-shaped but cylindrical, and the top plate portion 2A may be composed of only the cup portion 21. Also, the cup portion 21 may not be cup-shaped but cylindrical, and the top plate portion 2A may be composed of only the cup-shaped yoke 31.

[0067] In addition, those skilled in the art can appropriately modify the motor of the present invention in accordance with conventionally known knowledge. As long as the configuration of the present invention is still provided by such modifications, of course, it is included in the scope of the present invention.

Description of Reference Numerals

[0068] 1... shaft, 2... hub, 2A... top plate portion, 2B... cylindrical portion, 2C... frustum portion, 2b... bottom portion, 3... rotor, 4... bearing, 5... sleeve, 5c... outer peripheral surface, 5d... inner peripheral surface, 6... stator, 7... case, 8... substrate, 20a... hole portion, 20b... welded portion, 20c... hole portion, 21... cup portion, 21a... recessed portion, 22... impeller, 23... shaft mounting member, 23a... mounting member cylindrical portion, 23b... annular portion, 23c... annular portion, 30a... hole portion, 31... yoke, 31a... circular opening, 31d... inner wall portion, 32... magnet, 41... bearing, 41... first bearing, 41a... outer ring, 41b... inner ring, 41c... ball, 42... bearing, 42... second bearing, 42a... outer ring, 42b... inner ring, 42c... ball, 51... flange portion, 52... convex portion, 53... small inner diameter portion, 54... large inner diameter portion, 61... stator core, 62... coil, 63... insulator, 63b... end portion, 71... side wall portion, 72... bottom wall portion, 73... case cylindrical portion, 73a... notch portion, 74... air outlet, 100... motor, 101... blower

Claims

1. A shaft, a cup portion fixed to one end of the shaft and having a top plate portion extending in a direction perpendicular to the axial direction of the shaft, a bearing fixed to the shaft, a cylindrical sleeve for housing the bearing, a stator fixed to the outer peripheral portion of the sleeve, a rotor surrounding the stator, and comprising: the cup portion and the rotor being fixed, the cup portion being provided with a first hole portion and a second hole portion that open toward the end portion of the sleeve on the top plate portion side in the axial direction of the shaft, the second hole portion causing an air flow to be generated inside the top plate portion by the rotation of the rotor, the sleeve having a flange portion extending in a direction perpendicular to the axial direction of the shaft at the end portion on the top plate portion side, the first hole portion opening toward the flange portion in the axial direction of the shaft, a motor.

2. The motor according to claim 1, wherein the cup portion and the rotor are integrated to form a hub.

3. The motor according to claim 1 or 2, wherein the sleeve has a convex portion that projects in a direction perpendicular to the axial direction of the shaft on the top plate portion side of the stator and engages with the stator.

4. The bearing has at least a first bearing located closer to one end side of the shaft where the top plate portion is fixed and a second bearing located closer to the other end side opposite to the one end side, The motor according to any one of claims 1 to 3, wherein at least the sleeve, the first bearing, and the second bearing constitute one cartridge member.

5. Comprising a case for housing all or part of other components therein, the inner surface of the case having a first cylindrical portion standing upright in the inner direction, The motor according to any one of claims 1 to 4, wherein the sleeve is fixed to the case by fitting and fixing the end portion of the sleeve opposite to the top plate portion into the first cylindrical portion.

6. The center of the top plate portion has a second cylindrical portion standing upright on the sleeve side, The motor according to any one of claims 1 to 5, wherein the top plate portion is fixed to the shaft by fitting and fixing one end of the shaft into the second cylindrical portion.

7. The center of the top plate portion has a second cylindrical portion standing upright on the sleeve side, One end of the shaft is fitted and fixed to the second cylindrical portion, whereby the top plate portion is fixed to the shaft. The motor according to claim 5, wherein any one or both of the first cylindrical portion and the end portion of the sleeve opposite to the top plate portion, and the second cylindrical portion and one end of the shaft are fixed by press-fitting or a fixing method including press-fitting.

8. A shaft, A cup portion fixed to one end of the shaft and having a top plate portion extending in a direction perpendicular to the axial direction of the shaft, A bearing fixed to the shaft, A cylindrical sleeve for housing the bearing, A stator fixed to the outer periphery of the sleeve, A rotor surrounding the stator, A case for housing all or part of other components therein, Comprising: The cup portion and the rotor are fixed, The inner surface of the case has a first cylindrical portion standing upright in the inner direction, The center of the top plate portion has a second cylindrical portion standing upright on the sleeve side, The first cylindrical portion, the end portion of the sleeve opposite to the top plate portion, the second cylindrical portion, and one end of the shaft are all fixed by a fixing method including press-fitting or press-fitting, The cup portion is provided with a first hole portion and a second hole portion that open toward the end portion of the sleeve on the top plate portion side in the axial direction of the shaft, The second hole portion generates an air flow inside the top plate portion by the rotation of the rotor, The sleeve has a flange portion extending in a direction perpendicular to the axial direction of the shaft at the end portion on the top plate portion side, The motor, wherein the first hole portion opens toward the flange portion in the axial direction of the shaft.

9. A motor according to any one of claims 1 to 8, and An impeller fixed to the top plate portion, A blower device having the same.

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