Rotor of rotating electrical machine

Abstract

The purpose of the present invention is to obtain a rotor for a rotating electrical machine, which can improve the workability of mounting a plurality of magnet bodies to a rotor core. A plurality of first slots (12d) are provided in a first end surface (12a) of a rotor core (12). The second end face of the rotor core (12) is provided with a plurality of second slots. Each pressing member (15) has a first fixing protrusion (15b) inserted into the first groove (12d) and a second fixing protrusion inserted into the second groove. Each pressing member (15) can be guided by the first groove (12d) and the second groove and can be displaced in the radial direction of the rotor core (12) between a pressing position and a release position.

Description

Technical Field

[0001] This disclosure relates to the rotor of a rotating electrical machine. Background Technology

[0002] In conventional rotary electric motor rotors, multiple rows of magnets are mounted to the rotor core via multiple fixing components. Each fixing component has a fixing component body, multiple first pressing parts, and multiple second pressing parts. The fixing component body is positioned between two adjacent rows of magnets and is fixed to the rotor core by multiple bolts.

[0003] Multiple first pressing portions press the multiple magnets contained in one of two adjacent magnet columns onto the outer peripheral surface of the rotor core. Multiple second pressing portions press the multiple magnets contained in the other of two adjacent magnet columns onto the outer peripheral surface of the rotor core (for example, see Patent Document 1).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-169833 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] In conventional rotary motor rotors as described above, it is impossible to press down the multiple magnets contained in the magnet rows located on both sides until all the fixing components are completely fixed to the rotor core. Therefore, it is necessary to secure each fixing component to the rotor core with great care to prevent the multiple magnets from falling off the rotor core, which reduces operability.

[0009] This disclosure was made to solve the aforementioned problems, and its purpose is to provide a rotor for a rotary electric machine that can improve the workability of mounting multiple magnets on a rotor core.

[0010] Methods for solving problems

[0011] The rotor of the rotary electric machine disclosed herein comprises: a cylindrical rotor core having a first end face as one end face in the axial direction, a second end face as the other end face in the axial direction, and an outer peripheral surface; a plurality of magnets disposed at intervals from each other in the circumferential direction of the rotor core on the outer peripheral surface; and a plurality of pressing members mounted on the rotor core in such a manner as to alternate with the plurality of magnets in the circumferential direction of the rotor core, pressing the plurality of magnets onto the rotor core. A plurality of first grooves are provided on the first end face from the outer peripheral surface toward the center of the first end face, and a plurality of second grooves are provided on the second end face from the outer peripheral surface toward the center of the second end face. Each pressing member has: a main portion that abuts against a magnet; a first fixing protrusion inserted into the first groove; and a second fixing protrusion inserted into the second groove. Each pressing member is guided by the first and second grooves to radially shift along the rotor core between a pressing position and a releasing position. The pressing position is the position where the magnet is pressed onto the rotor core, and the releasing position is a position radially outward of the rotor core than the pressing position.

[0012] Invention Effects

[0013] The rotor of the rotating electric machine according to this disclosure improves the workability of mounting multiple magnets on the rotor core. Attached Figure Description

[0014] Figure 1 This is a perspective view of the rotor of the rotary electric motor according to Embodiment 1.

[0015] Figure 2 It means Figure 1 A three-dimensional view of the rotor core.

[0016] Figure 3 It means Figure 1 A three-dimensional image of the magnet sheet.

[0017] Figure 4 It means Figure 1 A three-dimensional view of the pressing component.

[0018] Figure 5 It means in Figure 1 A three-dimensional diagram showing the state of the rotor core with magnets installed midway through its operation.

[0019] Label Explanation

[0020] 12: Rotor core; 12a: First end face; 12b: Second end face; 12c: Outer peripheral surface; 12d: First groove; 12e: Second groove; 12i: Stop protrusion; 13: Magnet body; 14: Magnet piece; 14a: Magnet inclined surface; 15: Pressing component; 15a: Main part; 15b: First fixing protrusion; 15c: Second fixing protrusion; 15d: Elongated hole; 15e: Pressing inclined surface; 15f: Positioning protrusion; 16: Bolt (fastener). Detailed Implementation

[0021] The embodiments will now be described with reference to the accompanying drawings.

[0022] Implementation method 1.

[0023] Figure 1 This is a perspective view of the rotor of the rotary electric motor according to Embodiment 1. Figure 2 It means Figure 1 A three-dimensional view of the rotor core.

[0024] In the figure, the rotor has a shaft 11 as the rotation axis, a cylindrical rotor core 12, multiple magnets 13, multiple pressing parts 15, and multiple bolts 16 as fasteners.

[0025] The rotor core 12 is mounted on the shaft 11. The shaft 11 passes through the center of the rotor core 12.

[0026] The rotor core 12 has a first end face 12a, a second end face 12b, and an outer peripheral surface 12c. The first end face 12a is one end face of the rotor core 12 along its axial direction. The second end face 12b is the other end face of the rotor core 12 along its axial direction. The axial direction of the rotor core 12 is along the direction of the axis C of the rotor core 12.

[0027] On the first end face 12a, a plurality of first slots 12d are provided from the outer peripheral surface 12c toward the center of the first end face 12a. The plurality of first slots 12d are arranged radially with the axis C of the rotor core 12 as the center. That is, each first slot 12d is arranged along the radial direction of the rotor core 12. The radial direction of the rotor core 12 is perpendicular to the axis C of the rotor core 12.

[0028] On the second end face 12b, a plurality of second slots 12e are provided from the outer peripheral surface 12c toward the center of the second end face 12b. The plurality of second slots 12e are arranged radially with the axis C of the rotor core 12 as the center. That is, each second slot 12e is arranged along the radial direction of the rotor core 12.

[0029] Multiple connecting slots 12f are provided on the outer peripheral surface 12c along the axial direction of the rotor core 12. Each connecting slot 12f connects the corresponding first slot 12d with the corresponding second slot 12e.

[0030] Threaded holes 12g are provided on the bottom surface of each first groove 12d and the bottom surface of each second groove 12e.

[0031] Multiple end protrusions 12h are provided at one end of the outer peripheral surface 12c along the axial direction of the rotor core 12. Multiple stop protrusions 12i are provided at the other end of the outer peripheral surface 12c along the axial direction of the rotor core 12.

[0032] Each end protrusion 12h and each stop protrusion 12i are positioned opposite each other between adjacent connecting slots 12f. During the installation of each magnet 13 onto the rotor core 12, the detachment of each magnet 13 from the rotor core 12 is prevented by the stop protrusion 12i.

[0033] Multiple magnets 13 are spaced apart from each other on the outer peripheral surface 12c of the rotor core 12. The circumferential direction of the rotor core 12 is along the direction of a circle centered on the axis C of the rotor core 12.

[0034] Additionally, multiple magnets 13 face the inner circumference of the stator (not shown). The stator is provided with stator coils. The stator coils generate a magnetic field by the flow of current. The multiple magnets 13 generate a rotational force relative to the magnetic field generated by the stator coils.

[0035] Each magnet body 13 is composed of multiple magnet plates 14. Each magnet plate 14 is a permanent magnet. In each magnet body 13, the multiple magnet plates 14 are arranged along the axial direction of the rotor core 12. Figure 1 In the example, each magnet 13 is composed of three magnet pieces 14.

[0036] Multiple pressing members 15 are mounted on the rotor core 12 in a manner that alternates with multiple magnets 13 in the circumferential direction of the rotor core 12. The multiple magnets 13 are pressed against the rotor core 12 by the multiple pressing members 15. That is, each magnet 13 is pressed against the rotor core 12 by a pair of pressing members 15 adjacent to each other on both sides of the circumferential direction of the rotor core 12.

[0037] Multiple pressing components 15 are mounted to the rotor core 12 by multiple bolts 16.

[0038] Figure 3 It means Figure 1 A perspective view of the magnet sheet 14. A pair of magnet inclined surfaces 14a are provided on the side of each magnet sheet 14 opposite to the rotor core 12. The pair of magnet inclined surfaces 14a are inclined in a wedge shape, with the interval narrowing as they move towards the radially outward side of the rotor core 12.

[0039] Chamfered portions 14b are provided at both ends of each magnet piece 14 along the axial direction of the rotor core 12.

[0040] Figure 4 It means Figure 1 A perspective view of the pressing component 15. Each pressing component 15 has a main part 15a, a first fixing protrusion 15b, and a second fixing protrusion 15c.

[0041] The main part 15a is arranged along the axial direction of the rotor core 12 and inserted into the corresponding connecting slot 12f. In addition, the main part 15a abuts against the magnets 13 located on both sides.

[0042] The first fixing protrusion 15b protrudes radially inward from one end of the main portion 15a in the axial direction of the rotor core 12. Furthermore, the first fixing protrusion 15b is inserted into the corresponding first slot 12d.

[0043] The second fixing protrusion 15c protrudes radially inward from the other end of the main portion 15a in the axial direction of the rotor core 12. Furthermore, the second fixing protrusion 15c is inserted into the corresponding second slot 12e.

[0044] Each pressing component 15 can be guided by the first groove 12d and the second groove 12e. Figure 1 The pressing position shown is the same as Figure 5 The release positions shown are radially shifted along the rotor core 12. The pressing position is where the magnets 13 located on both sides are pressed against the rotor core 12 by the main part 15a. The release position is a position radially outward from the rotor core 12 compared to the pressing position.

[0045] By displacing the pressing member 15 radially along the rotor core 12, the first fixing protrusion 15b is guided by the first groove 12d to slide on the first end face 12a. Additionally, the second fixing protrusion 15c is guided by the second groove 12e to slide on the second end face 12b.

[0046] Each pressing component 15 has an elongated hole 15d on its first fixing protrusion 15b and second fixing protrusion 15c. A bolt 16 passes through each elongated hole 15d. Each bolt 16 passes through its corresponding elongated hole 15d and is screwed into its corresponding threaded hole 12g.

[0047] By tightening the bolts 16, the radial displacement of each pressing component 15 in the rotor core 12 is restricted. By loosening the bolts 16, the radial displacement of each pressing component 15 in the rotor core 12 can be made within the range of each elongated hole 15d.

[0048] A pair of pressing inclined surfaces 15e are provided on the main portion 15a of each pressing member 15. The pair of pressing inclined surfaces 15e are inclined in a wedge shape, narrowing in distance as they move toward the radially inward side of the rotor core 12. In addition, the pair of pressing inclined surfaces 15e abut against the magnet inclined surfaces 14a of the magnet pieces 14 located on both sides. That is, the pressing inclined surfaces 15e of the main portion 15a of the pressing members 15 located on both sides abut against the pair of magnet inclined surfaces 14a of each magnet piece 14.

[0049] Multiple positioning protrusions 15f are provided on a pair of pressing inclined surfaces 15e of each pressing component 15. The multiple positioning protrusions 15f abut against the chamfered portion 14b of the corresponding magnet piece 14, thereby positioning each magnet piece 14 in the axial direction of the rotor core 12.

[0050] Figure 5 It means in Figure 1 This is a perspective view showing the intermediate state of mounting magnets 13 onto the rotor core 12. In the installation operation of mounting multiple magnets 13 onto the rotor core 12, firstly, multiple pressing parts 15 are installed onto the rotor core 12. At this time, each pressing part 15 is installed onto the rotor core 12 in the released position.

[0051] Then, the rotor core 12 is placed with its second end face 12b facing downwards. In this state, as... Figure 5 As shown, each magnet piece 14 can be inserted from the axial end of the rotor core 12 between the rotor core 12 and the plurality of pressing members 15. By inserting three magnet pieces 14 between each adjacent pressing member 15, a magnet body 13 is formed. At this time, the stop protrusion 12i is used to prevent each magnet body 13 from falling off the rotor core 12.

[0052] Subsequently, while positioning each magnet piece 14 axially on the rotor core 12, each pressing component 15 is pressed into the pressing position, and each bolt 16 is tightened. Thus, each magnet body 13 is pressed and fixed to the rotor core 12 by the pressing components 15 located on both sides.

[0053] In the rotor of such a rotating electric motor, a plurality of first slots 12d are provided on the first end face 12a of the rotor core 12. A plurality of second slots 12e are provided on the second end face 12b of the rotor core 12. Each pressing member 15 has a first fixing protrusion 15b inserted into the first slot 12d and a second fixing protrusion 15c inserted into the second slot 12e. Moreover, each pressing member 15 can be guided by the first slot 12d and the second slot 12e to shift radially along the rotor core 12 between a pressing position and a releasing position.

[0054] Therefore, multiple magnets 13 can be temporarily installed on the rotor core 12 while multiple pressing parts 15 are installed on the rotor core 12. Furthermore, after the temporary installation, each pressing part 15 can be moved to a pressing position to press and fix the multiple magnets 13 to the rotor core 12.

[0055] Therefore, it is possible to prevent each magnet 13 from falling off the rotor core 12 during installation, thereby improving the workability of installing multiple magnets 13 onto the rotor core 12.

[0056] Furthermore, each pressing member 15 has an elongated hole 15d provided on its first fixing protrusion 15b and second fixing protrusion 15c. Each pressing member 15 is also capable of radial displacement along the rotor core 12 within the range of the elongated hole 15d.

[0057] Therefore, each pressing component 15 can be easily moved between the pressing position and the releasing position. As a result, the workability of mounting multiple magnets 13 onto the rotor core 12 can be further improved.

[0058] Furthermore, each magnet piece 14 of each magnet body 13 is provided with a pair of wedge-shaped inclined magnet surfaces 14a. Additionally, each pressing member 15 has a pair of wedge-shaped pressing inclined surfaces 15e on its main portion 15a. The pair of pressing inclined surfaces 15e of each pressing member 15 abut against the inclined magnet surfaces 14a of the magnet bodies 13 located on both sides.

[0059] Therefore, it is possible to easily position each magnet 13 in the circumferential direction of the rotor core 12. In addition, it is possible to press each magnet 13 more firmly into the rotor core 12.

[0060] In addition, multiple positioning protrusions 15f are provided on the main part 15a of each pressing member 15. Therefore, it is easy to position each magnet piece 14 in the axial direction of the rotor core 12.

[0061] In addition, multiple stop protrusions 12i are provided at the end of the outer peripheral surface 12c along the axial direction of the rotor core 12. This can more reliably prevent the magnets 13 from falling off the rotor core 12 during installation.

[0062] In addition, each magnet body 13 can be composed of one magnet piece 14, or it can be composed of two or more magnet pieces 14.

[0063] Furthermore, there is no particular limitation on the number of magnets 13 and the number of pressing parts 15.

[0064] In addition, a rotating electric machine can be an electric motor, a generator, or a generator-electric motor.

[0065] The preferred embodiments have been described in detail above, but are not limited to the embodiments described above. Various modifications and substitutions can be made to the embodiments described above without departing from the scope of the claims.

[0066] The various methods disclosed herein are summarized below as appendices.

[0067] (Postscript 1)

[0068] A rotor for a rotating electric motor, comprising:

[0069] A cylindrical rotor core has a first end face as one end face in the axial direction, a second end face as the other end face in the axial direction, and an outer peripheral surface.

[0070] Multiple magnets are arranged circumferentially spaced from each other on the outer peripheral surface of the rotor core; and

[0071] Multiple pressing components are mounted on the rotor core in a manner that alternates with the multiple magnets in the circumferential direction of the rotor core, and press the multiple magnets against the rotor core.

[0072] On the first end face, a plurality of first grooves are provided from the outer peripheral surface toward the center of the first end face.

[0073] On the second end face, a plurality of second grooves are provided from the outer peripheral surface toward the center of the second end face.

[0074] Each of the pressing components has: a main portion that abuts against the magnet body; a first fixing protrusion that is inserted into the first slot; and a second fixing protrusion that is inserted into the second slot, and each of the pressing components is guided by the first slot and the second slot to move radially along the rotor core between a pressing position and a releasing position.

[0075] The pressing position is the position where the magnet is pressed against the rotor core.

[0076] The release position is located radially outward from the rotor core compared to the pressing position.

[0077] (Postscript 2)

[0078] According to Appendix 1, the rotor of the rotating electric machine, wherein,

[0079] Each of the pressing components has an elongated hole provided on its first fixing protrusion and second fixing protrusion.

[0080] Fasteners for mounting each of the pressing components to the rotor core pass through each of the elongated holes.

[0081] Each of the pressing components is capable of radial displacement along the rotor core within the range of the elongated hole.

[0082] (Note 3)

[0083] The rotor of the rotating electric machine according to Appendix 1 or 2, wherein,

[0084] Each of the magnet bodies is provided with a pair of wedge-shaped inclined magnet surfaces that abut against the main portion of the pressing member located on both sides.

[0085] Each of the pressing components has a pair of wedge-shaped pressing inclined surfaces on its main part that abut against the magnet inclined surfaces of the magnet bodies located on both sides.

[0086] (Postscript 4)

[0087] The rotor of the rotating electrical machine according to any one of Appendices 1 to 3, wherein,

[0088] Each of the magnets is composed of a plurality of magnet plates arranged along the axial direction of the rotor core.

[0089] Each of the pressing components has a plurality of positioning protrusions on its main part, which position each of the magnet pieces in the axial direction of the rotor core.

[0090] (Note 5)

[0091] The rotor of the rotating electrical machine according to any one of Appendices 1 to 4, wherein,

[0092] Multiple stop protrusions are provided at the end of the outer peripheral surface along the axial direction of the rotor core to prevent the multiple magnets from falling off the rotor core.

Claims

1. A rotor for a rotating electric motor, comprising: A cylindrical rotor core has a first end face as one end face in the axial direction, a second end face as the other end face in the axial direction, and an outer peripheral surface. Multiple magnets are arranged circumferentially spaced from each other on the outer peripheral surface of the rotor core; and Multiple pressing components are mounted on the rotor core in a manner that alternates with the multiple magnets in the circumferential direction of the rotor core, and press the multiple magnets against the rotor core. On the first end face, a plurality of first grooves are provided from the outer peripheral surface toward the center of the first end face. On the second end face, a plurality of second grooves are provided from the outer peripheral surface toward the center of the second end face. Each of the pressing components has: a main portion that abuts against the magnet body; a first fixing protrusion that is inserted into the first slot; and a second fixing protrusion that is inserted into the second slot, and each of the pressing components is guided by the first slot and the second slot to move radially along the rotor core between a pressing position and a releasing position. The pressing position is the position where the magnet is pressed against the rotor core. The release position is located radially outward from the rotor core compared to the pressing position.

2. The rotor of the rotary electric motor according to claim 1, wherein, Each of the pressing components has an elongated hole provided on its first fixing protrusion and second fixing protrusion. Fasteners for mounting each of the pressing components to the rotor core pass through each of the elongated holes. Each of the pressing components is capable of radial displacement along the rotor core within the range of the elongated hole.

3. The rotor of the rotary electric motor according to claim 1 or 2, wherein, Each of the magnet bodies is provided with a pair of wedge-shaped inclined magnet surfaces that abut against the main portion of the pressing member located on both sides. Each of the pressing components has a pair of wedge-shaped pressing inclined surfaces on its main part that abut against the magnet inclined surfaces of the magnet bodies located on both sides.

4. The rotor of the rotating electric machine according to any one of claims 1 to 3, wherein, Each of the magnets is composed of a plurality of magnet plates arranged along the axial direction of the rotor core. Each of the pressing components has a plurality of positioning protrusions on its main part, which position each of the magnet pieces in the axial direction of the rotor core.

5. The rotor of the rotating electric machine according to any one of claims 1 to 4, wherein, Multiple stop protrusions are provided at the end of the outer peripheral surface along the axial direction of the rotor core to prevent the multiple magnets from falling off the rotor core.

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