Motors, blowers

Abstract

This provides a technology to simplify the fixing of the blade section. [Solution] The rotor yoke 10 includes a flange portion 14 that extends radially outward from the cylindrical portion 12 in an annular shape and on which the blade portion can be mounted, and an engagement recess 30 which is a recess in a part of the flange portion 14 that protrudes on the opposite side from the cover portion 50. The cover portion 50 is attached to the flange portion 14 of the rotor yoke 10. The cover portion 50 includes an engagement projection 60 that protrudes toward the flange portion 14 to engage with the recess of the engagement recess 30, a nut holding space 64 that can hold a nut inside the engagement projection 60, and an insertion opening 66 for inserting a nut into the nut holding space 64 from the side of the engagement projection 60.

Description

Technical Field

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

Background Art

[0002] The blower device rotates the impeller by a motor. The impeller is disposed below the motor and fixed to the motor by bolts and nuts (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] When installing the blower device on the ceiling, generally, after installing the motor on the ceiling, the impeller is fixed to the motor. Specifically, while preventing the impeller from falling by hand, it is necessary to screw the impeller to the lower side of the motor with nuts. As the impeller becomes larger, it becomes heavier, so the assemblability is not good. Such a situation also occurs when the impeller is removed from the motor for maintenance of the blower device and then fixed to the motor.

[0005] Therefore, the present disclosure solves the above problems and aims to provide a technique for simplifying the fixing of the impeller.

Means for Solving the Problems

[0006] To solve the above problems, a motor according to one embodiment of the present disclosure is a motor in which a blade portion is detachably fixed via a nut, and comprises a rotor yoke having a cylindrical portion and a flange portion extending radially outward from the cylindrical portion in an annular shape on which the blade portion can be mounted; a shaft that rotatably supports the rotor yoke; a stator connected to the shaft inside the cylindrical portion of the rotor yoke; and a cover portion attached to the flange portion of the rotor yoke and covering the stator together with the rotor yoke. The rotor yoke further comprises an engagement recess formed by recessing a part of the flange portion so as to protrude on the side opposite to the cover portion. The cover portion comprises an engagement projection that protrudes toward the flange portion so as to engage with the recess of the engagement recess, a nut holding space inside the engagement projection capable of holding a nut, and an insertion opening for inserting a nut into the nut holding space from the side of the engagement projection. [Effects of the Invention]

[0007] According to this disclosure, the fixing of the blade portion can be simplified. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the configuration of the blower according to this embodiment. [Figure 2] Figure 1 is a perspective view showing the configuration of the motor. [Figure 3] Figure 2 is an exploded perspective view showing the configuration of the motor. [Figure 4] Figure 3 is a magnified view of the rotor yoke and cover section. [Figure 5] Figures 5(a)-(c) are cross-sectional views showing the procedure for holding the nut by the engaging protrusion and engaging recess in Figure 3. [Figure 6] Figure 3 is a cross-sectional view showing the configuration in which the nut is held by the engaging protrusion and engaging recess. [Figure 7] Figures 7(a)-(d) are perspective views showing the configuration for holding the nut in the motor shown in Figure 2. [Modes for carrying out the invention]

[0009] Before specifically describing the embodiments of this disclosure, an overview of the embodiments will be given. This embodiment relates to a blower installed on a ceiling. The blower includes a motor and a fan. When installing the blower on a ceiling, the motor is installed on the ceiling first, and then the fan is fixed to the motor. In such a blower, as the size and weight of the fan increase, it is required to make it easier to fix the fan to the motor.

[0010] In the blower according to this embodiment, the blades are fixed on the rotor yoke of the motor. With this configuration, the blades are fixed to the rotor yoke while being supported by the rotor yoke. As a result, even if the blades are heavy, they become easier to support by hand, and it becomes easier to fix the blades to the motor. In addition, when fixing the blades on the rotor yoke of the motor, a separate nut holder (resin part) is required to attach the blades, but in this embodiment, a space for holding the nut is provided in the rotor yoke and cover of the motor, so a nut holder is not required.

[0011] The embodiments described below all represent preferred specific examples of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, as well as the steps (processes) and their order shown in the following embodiments are examples and are not intended to limit the present disclosure. Accordingly, among the components in the following embodiments, those components that are not described in the independent claims representing the highest-level concepts of the present disclosure will be described as optional components. In addition, substantially identical components are denoted by the same reference numerals in each figure, and redundant explanations are omitted or simplified.

[0012] Figure 1 is a perspective view showing the configuration of the blower 200. The blower 200 includes a motor 100 and four blades 150. The number of blades 150 included in the blower 200 is not limited to "4". The four blades 150 are detachably fixed to the motor 100 via nuts (not shown). The fixing of the blades 150 to the motor 100 will be described later. A rod-shaped shaft 40 extending upward is located in the center of the motor 100. The shaft 40 is rotatable in the circumferential direction D2 about an axis extending in the axial direction D1. Since the shaft 40 is fixed directly or indirectly to the ceiling, when the motor 100 is operated, the motor 100 and the blades 150 rotate. The direction radiating outward from the axis (axial direction D1) of the shaft 40 is indicated as the radial direction D3.

[0013] Figure 2 is a perspective view showing the configuration of the motor 100. This corresponds to the configuration of the blower 200 in Figure 1 with the blade section 150 removed. Figure 3 is an exploded perspective view showing the configuration of the motor 100. The motor 100 includes a rotor yoke 10, a shaft 40, a stator 42, and a cover section 50. Here, the combined state of the rotor yoke 10 and the cover section 50 as shown in Figure 2 can be referred to as the rotor.

[0014] The rotor yoke 10 includes a cylindrical portion 12 and a flange portion 14. The cylindrical portion 12 is positioned in the central part of a horizontal plane and has a hollow cylindrical shape. The upper surface of the cylindrical portion 12 is sealed, but has a circular opening, a through hole 20, in the central part. On the other hand, the lower surface of the cylindrical portion 12 (not shown) is completely open.

[0015] The flange portion 14 extends in an annular shape outward in the radial direction D3 from the cylindrical edge portion 22 of the cylindrical portion 12. The flange portion 14 is provided with a plurality of engagement recesses 30. One example of the number of engagement recesses 30 is "8". The shape of the engagement recesses 30 will be described later. One wing portion 150 (Figure 1) can be placed in two adjacent engagement recesses 30.

[0016] The cover part 50 is formed in a disc shape having a diameter equivalent to the annular outer diameter of the flange part 14. The cover part 50 is attached to the flange part 14 from the lower side of the flange part 14. The shaft 40 and the stator 42 are arranged at the central part of the cover part 50. The stator 42 is a stator and is a main part of the motor 100 together with the rotor. The stator 42 is the stationary part of the motor 100 and has a magnet around which a coil is wound. The rotor is the rotating part of the motor 100 and is supported on the shaft 40 via bearings. A permanent magnet (not shown) is arranged inside the rotor (for example, the inner wall of the cylindrical part 12). When an electric current is passed through the motor 100, the rotor rotates due to the action of the magnetic field formed in the stator 42 and the magnetic field formed in the rotor.

[0017] In the state where the cover part 50 is attached to the flange part 14, the cover part 50 covers the stator 42 together with the cylindrical part 12 of the rotor yoke 10. Also, the stator 42 is fixed to the shaft 40 inside the cylindrical part 12 of the rotor yoke 10. The shaft 40 supports the rotor yoke 10 rotatably. As described above, since the shaft 40 is fixed to the ceiling, when the motor 100 rotates, the rotor yoke 10 and the cover part 50 rotate.

[0018] A plurality of engaging convex parts 60 are provided on the cover part 50. An example of the number of the engaging convex parts 60 is "8". Each engaging convex part 60 is arranged at a position corresponding to one engaging concave part 30 on the cover part 50 and is engaged with the engaging concave part 30 when the cover part 50 is attached to the flange part 14. The shape of the cover part 50 will be described later. A nut 120 can be inserted inside the engaging convex part 60. The nut 120 is used to fix the blade part 150.

[0019] To explain the engaging recess 30 and the shaft 40 in more detail, FIG. 4 is also used here. FIG. 4 is a partially enlarged view of the rotor yoke 10 and the cover portion 50. The engaging recess 30 is formed by recessing a part of the flange portion 14 so as to project upward, that is, on the side opposite to the cover portion 50. The engaging recess 30 has a box shape and is entirely open on one side surface and the lower surface (not shown) in the circumferential direction D2. Further, the upper surface of the engaging recess 30 has a through hole 32 which is a circular opening. The through hole 32 leads to an engaging recess inner space 34 disposed inside the engaging recess 30.

[0020] The engaging convex portion 60 is formed by projecting a part of the cover portion 50 upward, that is, on the flange portion 14 side so as to engage with the recess of the engaging recess 30. The engaging convex portion 60 has a box shape and has a nut holding space 64 capable of holding a nut 120 (FIG. 3) inside. Further, the engaging convex portion 60 has an opening (hereinafter referred to as "insertion opening 66") on one side surface in the circumferential direction D2 and an opening (hereinafter referred to as "cover portion opening 62") on the lower surface. The side surface having the insertion opening 66 has the same orientation as the side surface that is entirely open in the engaging recess 30. The insertion opening 66 is an opening for inserting a nut into the nut holding space 64 in the circumferential direction D2, that is, laterally, of the disk shape of the engaging convex portion 60. Further, a part of the upper surface of the engaging convex portion 60 is open.

[0021] To explain the holding of the nut 120 in the engaging convex portion 60 and the engaging recess 30 in more detail, FIGS. 5(a)-(c) are also used here. FIGS. 5(a)-(c) are cross-sectional views showing the procedure for holding the nut 120 by the engaging convex portion 60 and the engaging recess 30 of FIG. 3. These are cross-sectional views taken along the line A-A' of FIG. 3, that is, cross-sectional views in the circumferential direction D2. FIG. 5(a) shows the configuration of the engaging convex portion 60. As described above, the engaging convex portion 60 is formed by recessing the cover portion 50 upward. As a result, the cover portion opening 62 is disposed below the engaging convex portion 60, the nut holding space 64 is disposed inside the engaging convex portion 60, and the insertion opening 66 is disposed on one side surface in the circumferential direction D2 of the engaging convex portion 60.

[0022] Figure 5(b) shows the configuration when a nut 120 is inserted into the engaging projection 60 of Figure 5(a) through the insertion opening 66. The nut 120 is held in the nut holding space 64. The width of the cover opening 62, which is the lower opening of the nut holding space 64, is indicated as "A". The width of the nut 120 is indicated as "B". As shown in the figure, "A" is smaller than "B". Since "A" is smaller than "B", the nut 120 does not fall out of the cover opening 62. Here, in the cover 50, the difference between the width "A" of the cover opening 62 and the width "B" of the nut 120 is indicated as the fall suppression part 68. The fall suppression part 68 is a part that protrudes inward into the nut holding space 64 on the same plane as the disc shape of the cover 50, and is a part that suppresses the fall of the nut 120 from the cover opening 62.

[0023] Figure 5(c) shows the configuration when the engaging recess 30 is placed over the engaging projection 60 of Figure 5(b) from above. When the engaging recess 30 and the engaging projection 60 engage, the engaging recess 30 covers the engaging projection 60 and the nut 120. As described above, the entire side surface of the engaging recess 30 is open in the same direction as the side surface of the engaging projection 60 that has the insertion opening 66. The thickness of the flange portion 14 in that portion is indicated as the discharge suppression portion 38. The discharge suppression portion 38 covers a part of the insertion opening 66 when the engaging recess 30 and the engaging projection 60 are engaged. The discharge suppression portion 38 prevents the nut 120 from coming out of the insertion opening 66.

[0024] Furthermore, when the engaging projection 60 is engaged with the engaging recess 30, the tip of the projection abuts against the inside of the engaging recess 30. In other words, no gap is formed between the engaging projection 60 and the engaging recess 30. Because no gap is formed, the nut 120 is supported by both the rotor yoke 10 and the cover portion 50. As a result, the strength supporting the nut 120 is enhanced.

[0025] Figure 6 is a cross-sectional view showing the configuration in which the nut 120 is held by the engaging projection 60 and the engaging recess 30. This is the B-B' cross-sectional view in Figure 3, that is, the cross-sectional view in the radial direction D3. As before, the engaging recess 30 and the engaging projection 60 engage, and the nut 120 is held in the nut holding space 64. However, there is no opening on the side. As a result, the nut 120 cannot be removed in the direction of the side or the radial direction D3.

[0026] As described above, the blade portion 150 is placed on the upper surface of the engaging recess 30. A screw (not shown) attached to the blade portion 150 passes through the through hole 32, the opening on the upper surface of the engaging projection 60, the through hole in the nut 120, and the opening 62 of the cover portion. In this state, the blade portion 150 is fixed to the motor 100 by screwing the screw and the nut 120 together. At this time, the weight of the blade portion 150 (Figure 1) applies a force to the nut 120 outward in the radial direction D3 and in the axial direction D1. Since the engaging recess 30 and the engaging projection 60 do not open in the radial direction D3, the nut 120 does not come out of the engaging recess 30 and the engaging projection 60 even when the weight of the blade portion 150 (Figure 1) is applied.

[0027] Figures 7(a)-(d) are perspective views showing the configuration for holding the nut 120 in the motor 100. Figure 7(a) is a perspective view of the motor 100 seen from above, and is shown in the same way as in Figure 2. Figure 7(b) is an enlarged perspective view of the engagement recess 30 in Figure 7(a). The engagement projection 60 is positioned within the engagement recess space 34 of the engagement recess 30, and the nut 120 is held within the nut holding space 64 of the engagement projection 60. The nut 120 is exposed to the outside of the engagement projection 60 through the insertion opening 66, but the discharge suppression part 38 prevents the nut 120 from coming loose.

[0028] Figure 7(c) is a perspective view of the motor 100 from below, and Figure 7(d) is an enlarged perspective view of the engaging projection 60 in Figure 7(c). The nut 120, which is held in the nut holding space 64, is exposed from the cover opening 62. The fall prevention part 68 prevents the nut 120 from falling.

[0029] In this embodiment, the engaging projection 60 is positioned in the internal space 34 of the engaging recess 30 on which the blade portion 150 is placed, and the nut 120 is held in the nut holding space 64 of the engaging projection 60, so that the blade portion 150 can be fixed on top of the motor 100. Also, since the blade portion 150 is fixed on top of the motor 100, fixing the blade portion 150 can be simplified. Since the nut 120 is held by the engaging recess 30 of the rotor yoke 10 and the engaging projection 60 of the cover portion 50, a separate nut holder can be eliminated.

[0030] Furthermore, since the nut 120 is inserted into the nut holding space 64 from the circumferential direction D2 of the cover portion 50, even if the weight of the wing portion 150 is applied to the engaging projection 60, the nut 120 is less likely to come off the engaging projection 60. Also, since the fall suppression portion 68 protrudes inward into the nut holding space 64, the nut 120 can be prevented from falling. In addition, since the discharge suppression portion 38 covers a part of the insertion opening 66 when the engaging recess 30 and the engaging projection 60 are engaged, the nut 120 can be prevented from coming out of the insertion opening 66. Furthermore, since the tip of the projection abuts against the inside of the engaging recess 30 when the engaging projection 60 and the engaging recess 30 are engaged, the strength supporting the nut 120 can be strengthened.

[0031] An overview of one aspect of this disclosure is as follows: (Item 1) A motor (100) in which the blade portion (150) is detachably fixed via a nut (120), A rotor yoke (10) comprising a cylindrical portion (12) and a flange portion (14) that extends radially (D3) outward from the cylindrical portion (12) in an annular shape and on which the blade portion (150) can be mounted, A shaft (40) that rotatably supports the rotor yoke (10), The stator (42) connected to the shaft (40) is located inside the cylindrical portion (12) of the rotor yoke (10), The rotor yoke (10) is attached to the flange portion (14) and includes a cover portion (50) that covers the stator (42) together with the rotor yoke (10), The rotor yoke (10) is The system further includes an engaging recess (30) formed by recessing a part of the flange portion (14) so ​​as to protrude on the opposite side from the cover portion (50), The cover portion (50) is An engaging projection (60) is projected toward the flange portion (14) so ​​as to engage with the recess (30) of the engaging recess (30), Inside the engaging projection (60) there is a nut holding space (64) capable of holding the nut (120), A motor (100) comprising an insertion opening (66) for inserting the nut (120) into the nut holding space (64) from the side of the engaging projection (60).

[0032] (Item 2) The cover portion (50) is The flange portion (14) is formed in a disc shape having a diameter equivalent to the annular outer diameter, The aforementioned insertion opening (66) is The motor (100) described in item 1, wherein the nut (120) can be inserted into the nut holding space (64) from the circumferential direction in the disc shape.

[0033] (Item 3) The cover portion (50) is The motor (100) according to item 2, further comprising a fall suppression part (68) that protrudes inward from the nut holding space (64) on the same plane as the disc-shaped part.

[0034] (Item 4) The flange portion (14) is The motor (100) according to item 1, comprising a discharge suppression portion (38) that covers a part of the insertion opening (66) when the engaging recess (30) and the engaging projection (60) are engaged.

[0035] (Item 5) The aforementioned engaging projection (60) The motor (100) described in item 1, wherein the tip of the projection abuts against the inside of the engagement recess (30) when engaged with the engagement recess (30).

[0036] (Item 6) The aforementioned blade portion (150) and, A blower (200) comprising the motor (100) described in item 1.

[0037] Although the present disclosure has been explained above based on the examples, it can be easily inferred that the present disclosure is not limited in any way to the above examples, and that various improvements and modifications are possible without departing from the spirit of the present disclosure. [Explanation of Symbols]

[0038] D1 Axial direction, D2 Circumferential direction, D3 Radial direction, 10 Rotor yoke, 12 Cylindrical section, 14 Flange section, 20 Through hole, 22 Cylindrical edge, 30 Engaging recess, 32 Through hole, 34 Space inside the engaging recess, 38 Discharge suppression section, 40 Shaft, 42 Stator, 50 Cover section, 60 Engaging protrusion, 62 Cover section opening, 64 Nut holding space, 66 Insertion opening, 68 Drop suppression section, 100 Motor, 120 Nut, 150 Blade section, 200 Blower.

Claims

1. A motor in which the blade portion is detachably fixed via a nut, A rotor yoke comprising a cylindrical portion and a flange portion that extends radially outward from the cylindrical portion in an annular shape and on which the blade portion can be mounted, A shaft that rotatably supports the rotor yoke, Inside the cylindrical portion of the rotor yoke, a stator is connected to the shaft, The rotor yoke is fitted to the flange portion and includes a cover portion that covers the stator together with the rotor yoke, The rotor yoke is The system further includes an engaging recess formed by recessing a part of the flange portion so as to protrude on the opposite side from the cover portion, The aforementioned cover portion is An engaging projection is provided which protrudes toward the flange portion so as to engage with the recess of the aforementioned engaging recess, A nut holding space capable of holding the nut is provided inside the engagement projection, A motor comprising an insertion opening for inserting the nut into the nut holding space from the side of the engaging projection.

2. The aforementioned cover portion is It is formed in a disc shape having a diameter equivalent to the annular outer diameter of the flange portion, The aforementioned insertion opening is The motor according to claim 1, wherein the nut can be inserted into the nut holding space from the circumferential direction of the disc shape.

3. The aforementioned cover portion is The motor according to claim 2, further comprising a fall suppression portion that protrudes inward into the nut holding space on the same plane as the disc-shaped portion.

4. The flange portion is The motor according to claim 1, further comprising a discharge suppression portion that covers a part of the insertion opening when the engaging recess and the engaging protrusion are engaged.

5. The aforementioned engaging projection is The motor according to claim 1, wherein the tip of the projection abuts against the inside of the engagement recess when engaged with the engagement recess.

6. The aforementioned blade portion and, A blower comprising the motor described in claim 1.

Images