Rotary electric machine

Abstract

To prevent loss of a shaft fastening device and reduce labors in storing the shaft fastening device.SOLUTION: A rotary electric machine 1 has a revolving shaft 10 having a rotor 17 in a central part, a stator 16 arranged around the rotor in a circumferential direction, a pair of bearings 11 and 12 rotatably supporting both end parts of the revolving shaft, a pair of brackets 13 and 14 holding the pair of bearings respectively, an outer frame 15 holding the pair of brackets and the stator, and a cover (an outer blade cover 18) fixed to the outer frame or the brackets. The revolving shaft has a projecting part 10a projecting from the bracket at least on one side to the outside. The projecting part of the revolving shaft is covered with the cover. A shaft fastening device 50 fixing the revolving shaft temporarily non-rotatably is integrally provided in the cover.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a rotating electric machine. [Background technology]

[0002] In rotating electric machines, vibrations during transportation may be transmitted from the rotating shaft to the bearings, placing a load on the bearings. To prevent this, a shaft stopper device (jig) is attached to the rotating electric machine during transportation to prevent vibrations caused by transportation from being transmitted from the rotating shaft to the bearings. In this way, the rotating electric machine protects the bearings by preventing loads from being applied to them. Note that Patent Document 1 describes a technique related to the shaft stopper device. Patent Document 1 describes a structure in which the load side of the rotating shaft is fastened with a belt, and a technique in which a jig attached to a cover that covers the load side is pressed against the rotating shaft to fix the rotating shaft.

[0003] The shaft stop device becomes unnecessary after the rotating electric machine is transported. Therefore, the shaft stop device is removed from the rotating electric machine after the rotating electric machine is transported. Then, the disposal of the shaft stop device removed from the rotating electric machine is left to the discretion of the customer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-191747 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the conventional technology disclosed in Patent Document 1 aims to reduce the number of parts in the shaft stopping device, thereby reducing the number of man-hours and the disposal cost. Furthermore, the conventional technology does not take into consideration the possibility that the shaft stopping device (jig) removed from the rotating electric machine may be lost, or the troublesome storage of the shaft stopping device (jig). Therefore, with the conventional technology, the shaft stopping device (jig) removed from the rotating electric machine may be lost, or the troublesome storage of the shaft stopping device (jig) may be required.

[0006] The present invention has been made to solve the above-mentioned problems, and its main object is to provide a rotating electric machine that prevents loss of a shaft stopping device and reduces the hassle of storing the shaft stopping device. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present invention provides a rotating electric machine comprising a rotating shaft having a rotor in the center, a stator arranged circumferentially around the rotor, a pair of bearings supporting both ends of the rotating shaft so that they can rotate freely, a pair of brackets holding each of the pair of bearings, an outer frame holding the pair of brackets and the stator, and a cover fixed to the outer frame or the brackets, wherein the rotating shaft has a protruding portion that protrudes outward from at least one of the brackets, the protruding portion of the rotating shaft is covered by the cover, and the cover is integrally provided with a shaft stopping device that temporarily fixes the rotating shaft so that it cannot rotate. Other means will be described later. Effect of the Invention

[0008] According to the present invention, it is possible to prevent the shaft stopping device from being lost and to reduce the trouble of storing the shaft stopping device. [Brief description of the drawings]

[0009] [Figure 1] 1 is an external view of a rotating electric machine according to a first embodiment. [Diagram 2]1 is a cross-sectional view of a rotating electric machine according to a first embodiment. [Diagram 3] 1 is a configuration diagram of a shaft stopping device for a rotating electric machine according to a first embodiment. [Figure 4] FIG. 2 is an explanatory diagram of a rotating shaft before being fixed by the shaft stopping device for a rotating electric machine according to the first embodiment. [Diagram 5] 4 is an explanatory diagram of a state after a rotating shaft is fixed by the shaft stopping device for a rotating electric machine according to the first embodiment. FIG. [Figure 6] FIG. 11 is a configuration diagram of a shaft stopping device for a rotating electric machine according to a second embodiment. [Figure 7] FIG. 11 is a configuration diagram of a shaft stopping device for a rotating electric machine according to a third embodiment. [Figure 8] FIG. 11 is a configuration diagram of a shaft stopping device for a rotating electric machine according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described in detail with reference to the drawings. Note that each drawing is merely a schematic illustration to allow a sufficient understanding of the present invention. Therefore, the present invention is not limited to only the illustrated examples. In addition, in each drawing, common or similar components are given the same reference numerals, and duplicated explanations thereof will be omitted.

[0011] [Embodiment 1] <Configuration of rotating electric machine> Hereinafter, the configuration of a rotating electric machine 1 according to the first embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is an external view of the rotating electric machine 1 according to the first embodiment. Fig. 2 is a cross-sectional view of the rotating electric machine 1.

[0012] As shown in FIGS. 1 and 2, the rotating electric machine 1 according to the first embodiment has an outer hull formed by a bottomed cylindrical bracket 13, a bracket 14 (FIG. 2), and a cylindrical outer frame 15.

[0013] A rotating shaft 10 is disposed inside the rotating electric machine 1. The rotating shaft 10 is disposed so that an end on the side where a load is installed protrudes from the inside of the rotating electric machine 1 to the outside. Here, in the configuration shown in FIG. 2, the end of the rotating shaft 10 on the side where a load is installed is the end of the rotating shaft 10 on the side where a bracket 13 is provided. Also, the end of the rotating shaft 10 on the side where a bracket 14 is provided is the end of the rotating shaft 10 on the side where a load is not installed. Hereinafter, with reference to the vicinity of the center of the rotating shaft 10, the side close to the bracket 13 is referred to as the "load side", and the side close to the bracket 14 is referred to as the "anti-load side". Also, the direction from the vicinity of the center of the rotating shaft 10 toward the bracket 13 is referred to as the "load side direction", and the direction from the vicinity of the center of the rotating shaft 10 toward the bracket 14 is referred to as the "anti-load side direction".

[0014] As shown in FIG. 2, a stator 16 is fixedly disposed inside a cylindrical outer frame 15 that forms an outer shell. A rotor 17 is rotatably disposed inside the stator 16. The rotor 17 is fixed to the center of a rotating shaft 10. Both end sides of the rotating shaft 10 are rotatably supported by a pair of bearings 11 and 12. The bearing 11 is a bearing disposed on the load side, and the bearing 12 is a bearing disposed on the anti-load side. The bearing 11 is fixed by a bracket 13 on the load side, and the bearing 12 is fixed by a bracket 14 on the anti-load side. The rotating shaft 10 is disposed so that the rotor 17 faces the inside of the stator 16.

[0015] An outer blade 19 is attached to the end of the anti-load side of the rotating shaft 10. The outer blade 19 is fixed to the anti-load side where no load is placed on the rotating shaft 10. The outer blade 19 rotates together with the rotating shaft 10 and forms a flow of air (cooling air) for cooling the rotating electric machine 1.

[0016] Around the outer blades 19, an outer blade cover 18 is arranged as a cover for protecting the outer blades 19. The outer blade cover 18 covers the outer blades 19 of the rotating electric machine 1 from the anti-load side, and is fixed to the outer frame 15 or the bracket 14 (bracket 14 in the illustrated example) to prevent contact with the outer blades 19 from the outside. In addition, the material of the outer blade cover 18 is preferably a metal material to ensure the strength to protect the outer blades 19.

[0017] The rotating shaft 10 has a protruding portion 10a that protrudes outward from at least one of the brackets 13 and 14 (bracket 14 in this embodiment). The protruding portion 10a of the rotating shaft 10 is covered by an outer blade cover 18. A flat surface portion 10aa is formed at the end of the protruding portion 10a.

[0018] A shaft stopper device 50 for temporarily fixing the rotating shaft 10 so that it cannot rotate is integrally provided on the outer blade cover 18. During transportation, the rotating electric machine 1 presses down the rotating shaft 10 with the shaft stopper device 50, thereby preventing vibrations caused by transportation from being transmitted from the rotating shaft 10 to the bearings 11, 12. In this way, the rotating electric machine 1 protects the bearings 11, 12 by preventing a load from being applied to the bearings 11, 12.

[0019] <Configuration of shaft stopper device> The configuration of the shaft stopping device 50 will be described below with reference to Fig. 3 to Fig. 5. Fig. 3 is a configuration diagram of the shaft stopping device 50. Fig. 3 shows an enlarged view of the configuration of the cover side portion 20 of the rotating electric machine 1 shown in Fig. 2. Fig. 4 is an explanatory diagram of the rotating shaft 10 before being fixed by the shaft stopping device 50. Fig. 5 is an explanatory diagram of the rotating shaft 10 after being fixed by the shaft stopping device 50.

[0020] As shown in FIG. 3, in this embodiment, the shaft stop device 50 is composed of a circular through hole H18 provided in the outer blade cover 18 and a fixing tool 51 attached to the through hole H18. The through hole H18 is provided in the center part of the outer blade cover 18, that is, in a position part of the outer blade cover 18 in the extension direction of the rotating shaft 10. The fixing tool 51 is a member that directly or indirectly abuts against the protruding part 10a of the rotating shaft 10 to temporarily fix the rotating shaft 10 to be unrotatable. In this embodiment 1 to the embodiment 3 described later, the fixing tool 51 directly abuts against the protruding part 10a of the rotating shaft 10 to temporarily fix the rotating shaft 10 to be unrotatable. In the embodiment 4 described later, the fixing tool 51 indirectly abuts against the protruding part 10a of the rotating shaft 10 via a pillar member 54 (FIG. 8) described later to temporarily fix the rotating shaft 10 to be unrotatable. The inner end of the fixture 51 (the end facing the protruding portion 10a of the rotating shaft 10) is formed in a flat shape. The material of the fixture 51 is preferably a metal material in order to ensure the strength required to fix the rotating shaft 10.

[0021] The fixture 51 is disposed so as to pass through the through hole H18 and extend toward the protruding portion 10a of the rotating shaft 10. The through hole H18 holds the fixture 51 movably toward the protruding portion 10a of the rotating shaft 10 (in the axial direction). Therefore, it is preferable that the through hole H18 has a thickness capable of holding the fixture 51 in the axial direction.

[0022] The fixture 51 is a rod-shaped member having a rod-like shape. The fixture 51 has a cylindrical portion 51a and a protruding portion 51b protruding radially from the cylindrical portion 51a. As shown in FIG. 4, the through hole H18 has a circular hole H18a and a hollow groove-like expanded portion H18b formed by expanding from the circular hole H18a to the periphery. The diameter of the circular hole H18a of the through hole H18 is equal to the diameter of the cylindrical portion 51a of the fixture 51. The size of the expanded portion H18b of the through hole H18 is set to be slightly (for example, about several millimeters) larger than the protruding portion 51b of the fixture 51. This allows the expanded portion H18b of the through hole H18 to pass through the protruding portion 51b of the fixture 51 when the fixture 51 is moved in the direction of the protruding portion 10a of the rotating shaft 10.

[0023] When the rotating electric machine 1 is transported, the shaft stopping device 50 is operated by a user as follows to temporarily fix the rotating shaft 10.

[0024] As shown in FIG. 4, for example, when the rotating electric machine 1 is transported, the user rotates the fixture 51 so that the phase (circumferential position) of the protrusion 51b of the fixture 51 and the expansion portion H18b of the through hole H18 of the outer blade cover 18 match. As a result, when the user pushes the fixture 51 toward the protrusion 10a of the rotating shaft 10, the rotating electric machine 1 can pass the protrusion 51b of the fixture 51 through the expansion portion H18b of the through hole H18 without interfering with the fixture 51 and the outer blade cover 18. Next, the user pushes the fixture 51 toward the protrusion 10a of the rotating shaft 10 to move the fixture 51 toward the protrusion 10a of the rotating shaft 10. At that time, the protrusion 51b of the fixture 51 passes through the expansion portion H18b of the through hole H18. As a result, the user can abut the fixture 51 against the flat portion 10aa of the protrusion 10a of the rotating shaft 10.

[0025] As shown in FIG. 5, the user then rotates the fixture 51 to shift the phase (circumferential position) of the protrusion 51b of the fixture 51 and the expansion portion H18b of the through hole H18, thereby hooking the protrusion 51b of the fixture 51 to the inside of the outer blade cover 18. As a result, the rotating electric machine 1 can suppress the movement of the rotating shaft 10 by pressing the rotating shaft 10 to be unrotatable with the fixture 51. Then, the rotating electric machine 1 can prevent vibration caused by transportation from being transmitted from the rotating shaft 10 to the bearings 11 and 12. As a result, the rotating electric machine 1 can protect the bearings 11 and 12 by preventing a load from being applied to the bearings 11 and 12. Also, the rotating electric machine 1 can prevent the fixture 51 from being pushed back to the anti-load side by hooking the protrusion 51b of the fixture 51 to the inside of the outer blade cover 18.

[0026] In addition, after transporting the rotating electric machine 1, the user rotates the fixing tool 51 so that the phase (circumferential position) of the protrusion 51b of the fixing tool 51 and the expansion part H18b of the through hole H18 of the outer blade cover 18 match. This allows the rotating electric machine 1 to release (release) the fixing tool 51 from pressing down on the rotating shaft 10. Next, the user pulls the fixing tool 51 in the direction of the counter-load side (direction away from the protrusion part 10a of the rotating shaft 10) to move the fixing tool 51 in the direction of the counter-load side. At that time, the protrusion part 51b of the fixing tool 51 passes through the expansion part H18b of the through hole H18. This allows the rotating electric machine 1 to release (release) the contact between the fixing tool 51 and the flat part 10aa of the protrusion part 10a of the rotating shaft 10.

[0027] In this configuration, the fixing device 51 does not need to be removed because it is held in the through hole H18s of the outer blade cover 18. Therefore, the rotating electric machine 1 can prevent the shaft stopping device 50 (particularly the fixing device 51) from being lost and can reduce the effort required for storing the shaft stopping device 50 (particularly the fixing device 51).

[0028] <Main features of rotating electrical machines> (1) As shown in FIG. 2, the rotating electric machine 1 according to this embodiment includes a rotating shaft 10, a stator 16, a pair of bearings 11 and 12, a pair of brackets 13 and 14, an outer frame 15, and an outer blade cover 18 (cover). The rotating shaft 10 has a rotor 17 in the center. The stator 16 is arranged around the rotor 17 in the circumferential direction. The pair of bearings 11 and 12 rotatably support both ends of the rotating shaft 10. The pair of brackets 13 and 14 hold the pair of bearings 11 and 12, respectively. The outer frame 15 holds the pair of brackets 13 and 14 and the stator 16. The outer blade cover 18 (cover) is fixed to the outer frame 15 or the bracket 14. The rotating shaft 10 has a protruding portion 10a protruding outward from at least one of the brackets 14. The protruding portion 10a of the rotating shaft 10 is covered by the outer blade cover 18. The outer blade cover 18 is integrally provided with a shaft stopper device 50 for temporarily fixing the rotating shaft 10 so that it cannot rotate.

[0029] In the rotating motor 1 according to this embodiment, the shaft stopping device 50 is integrally formed with the outer blade cover 18, which prevents the shaft stopping device 50 from being lost and reduces the effort required for storing the shaft stopping device 50.

[0030] (2) As shown in Fig. 3, in the rotating electric machine 1 according to this embodiment, the shaft stop device 50 has a fixing member 51 that directly or indirectly contacts the protruding portion 10a of the rotating shaft 10 to temporarily fix the rotating shaft 10 so that it cannot rotate. The outer blade cover 18 preferably has a through hole H18 in a portion located in the extension direction of the rotating shaft 10, and is configured to movably hold the fixing member 51 toward the protruding portion 10a of the rotating shaft 10 by the through hole H18.

[0031] In the rotating motor 1 of this embodiment, the fixing device 51 is movably held toward the protruding portion 10a of the rotating shaft 10 by the through hole H18, so that it is not necessary to remove the fixing device 51 of the shaft stopping device 50 from the rotating motor 1.

[0032] 3 to 5, in the rotating electric machine 1 according to this embodiment, the fixing device 51 has a cylindrical portion 51a and a protruding portion 51b protruding radially from the cylindrical portion 51a. The through hole H18 may have a circular hole H18a (FIG. 4) having a size equal to the diameter of the cylindrical portion 51a of the fixing device 51, and a hollow groove-like extension portion H18b (FIG. 4) formed by extending from the circular hole H18a (FIG. 4) to the periphery so that the protruding portion 51b of the fixing device 51 can pass through.

[0033] In the rotating electric machine 1 according to this embodiment, the cylindrical portion 51a of the fixing tool 51 is rotated while moving in the circular hole H18a (FIG. 4) of the through hole H18, so that the protruding portion 51b of the fixing tool 51 passes through the expanding portion H18b (FIG. 4). After that, in the rotating electric machine 1 according to this embodiment, the cylindrical portion 51a of the fixing tool 51 is rotated while moving in the circular hole H18a (FIG. 4) of the through hole H18, so that the protruding portion 51b of the fixing tool 51 abuts against the inner surface of the outer blade cover 18 and the end of the fixing tool 51 abuts against the protruding portion 10a of the rotating shaft 10. In this way, the rotating electric machine 1 according to this embodiment can temporarily fix the rotating shaft 10 so that it cannot rotate.

[0034] (4) As shown in FIGS. 3 to 5, in the rotating electric machine 1 according to this embodiment, the fixing device 51 may be disposed so as to protrude outward from the through hole H18 so that a portion of the fixing device 51 functions as a gripping portion.

[0035] In the rotating electric machine 1 according to this embodiment, the fixing device 51 protrudes to the outside from the through hole H18, and the protruding portion can be used (operated) as a grip portion 51c.

[0036] As described above, according to the rotating electric machine 1 of the first embodiment, it is possible to prevent the shaft stopping device 50 (particularly the fixing device 51) from being lost, and to reduce the effort required for storing the shaft stopping device 50 (particularly the fixing device 51).

[0037] [Embodiment 2] Hereinafter, the configuration of the shaft stopping device 50A of the rotating electric machine 1A according to the second embodiment will be described with reference to Fig. 6. Fig. 6 is a configuration diagram of the shaft stopping device 50A of the rotating electric machine 1A according to the second embodiment.

[0038] As shown in Fig. 6, the rotating electric machine 1A according to the second embodiment differs from the rotating electric machine 1 (Fig. 3) according to the first embodiment in that it includes a shaft stopping device 50A instead of the shaft stopping device 50 (Fig. 3). The shaft stopping device 50A according to the second embodiment differs from the shaft stopping device 50 (Fig. 3) according to the first embodiment in that it includes a support 52 on the inside of the outer blade cover 18.

[0039] The support 52 is a member that supports the fixing device 51 together with the outer blade cover 18. The support 52 has a cylindrical shape with a bottom. The support 52 has a circular through hole (hereinafter referred to as the "support side through hole H52") at the center of the bottom. The support side through hole H52 is provided in the center of the support 52, that is, in the extension direction of the rotation shaft 10 of the support 52. The support tool 52 has a storage space between the outer blade cover 18 for storing a part of the fixing tool 51 .

[0040] The fixing tool 51 is arranged to penetrate the through hole H18 of the outer blade cover 18 and the support tool side through hole H52 of the support tool 52. The shaft stop device 50A supports the fixing tool 51 with the through hole H18 of the outer blade cover 18 and the support tool side through hole H52 of the support tool 52, so that the fixing tool 51 can be supported axially movable without swinging up, down, left, and right. Therefore, the rotating electric machine 1A can vertically abut the inner end of the fixing tool 51 (the end facing the protruding part 10a of the rotating shaft 10) against the flat part 10aa of the protruding part 10a of the rotating shaft 10. In addition, the material of the support tool 52 is preferably a metal material in order to ensure the strength to support the fixing tool 51.

[0041] In this configuration, the fixing device 51 is not required to be removed because it is held in the through hole H18s of the outer blade cover 18 and the support-side through hole H52 of the support 52. Therefore, the rotating electric machine 1A can prevent the shaft stopping device 50 (particularly the fixing device 51) from being lost and can reduce the effort required for storing the shaft stopping device 50 (particularly the fixing device 51).

[0042] Moreover, the rotating electric machine 1A according to this embodiment can support the fixing device 51 so as to be movable in the axial direction without swinging up, down, left, or right. Therefore, the rotating electric machine 1A can make the inner end portion of the fixing device 51 (the end portion facing the protruding portion 10a of the rotating shaft 10) abut perpendicularly against the flat portion 10aa of the protruding portion 10a of the rotating shaft 10.

[0043] [Embodiment 3] Hereinafter, the configuration of the shaft stopping device 50B of the rotating electric machine 1B according to the third embodiment will be described with reference to Fig. 7. Fig. 7 is a configuration diagram of the shaft stopping device 50B of the rotating electric machine 1B according to the third embodiment.

[0044] As shown in Fig. 7, the rotating electric machine 1B according to the third embodiment differs from the rotating electric machine 1A according to the second embodiment (Fig. 6) in that it includes a shaft stopper device 50B instead of the shaft stopper device 50A (Fig. 6). The shaft stopper device 50B according to the third embodiment differs from the shaft stopper device 50B according to the second embodiment (Fig. 6) in that it includes a bolt 53 instead of the fixing device 51, and that a through hole H18s and a support side through hole H52s are provided in the outer blade cover 18 and the support 52s instead of the through hole H18 and the support side through hole H52.

[0045] The bolt 53 is a member used as a fixing device. Like the fixing device 51 of the first and second embodiments, the bolt 53 directly or indirectly abuts against the protruding portion 10a of the rotating shaft 10 to temporarily fix the rotating shaft 10 so that it cannot rotate. A male thread 53s is formed on the surface of the bolt 53.

[0046] The through hole H18s and the support side through hole H52s of the outer blade cover 18 are holes with female threads formed on the inner surface. That is, the through hole H18s and the support side through hole H52s of the outer blade cover 18 are configured as screw holes. The through hole H18s and the support side through hole H52s of the outer blade cover 18 are provided on the axial direction of the rotating shaft 10. The bolt 53 is arranged to pass through the through hole H18s and the support side through hole H52s of the outer blade cover 18.

[0047] When transporting the rotating electric machine 1, a user advances the bolt 53 in the direction of the protruding portion 10a of the rotating shaft 10 (toward the load side) by tightening the bolt 53. This allows the rotating electric machine 1B to vertically abut the inner end portion (the end portion facing the protruding portion 10a of the rotating shaft 10) of the bolt 53 against the flat portion 10aa of the protruding portion 10a of the rotating shaft 10. In this manner, the rotating electric machine 1B can press the rotating shaft 10 with the bolt 53 so that it cannot rotate, and can prevent vibrations caused by transportation from being transmitted from the rotating shaft 10 to the bearings 11 and 12. This allows the rotating electric machine 1A to protect the bearings 11 and 12 by preventing a load from being applied to the bearings 11 and 12.

[0048] After transporting the rotating electric machine 1, the user loosens the bolt 53 to move the bolt 53 backward in the direction toward the outer blade cover 18 (the direction toward the opposite load side). This allows the rotating electric machine 1B to release (disengage) the contact between the bolt 53 and the flat surface portion 10aa of the protruding portion 10a of the rotating shaft 10.

[0049] In this configuration, the bolt 53 does not need to be removed because it is screwed into the through hole H18s (threaded hole) of the outer blade cover 18. Therefore, the rotating electric machine 1 can prevent the shaft stop device 50B (particularly the bolt 53 as a fixing tool) from being lost and can reduce the effort required for storing the shaft stop device 50B (particularly the bolt 53).

[0050] Furthermore, by using bolts 53 as fastening devices in rotating electrical machine 1B, the number of manufacturing steps for parts can be reduced, and rotating shaft 10 can be fixed and released simply by tightening and loosening bolts 53.

[0051] [Embodiment 4] Hereinafter, the configuration of the shaft stopping device 50C of the rotating electric machine 1C according to the fourth embodiment will be described with reference to Fig. 8. Fig. 8 is a configuration diagram of the shaft stopping device 50C of the rotating electric machine 1C according to the fourth embodiment.

[0052] As shown in Fig. 8, the rotating electric machine 1C according to the present embodiment 4 differs from the rotating electric machine 1B (Fig. 7) according to the above-described embodiment 3 in that it includes a shaft stopping device 50C instead of the shaft stopping device 50B (Fig. 7). The shaft stopping device 50C according to the present embodiment 4 differs from the shaft stopping device 50B (Fig. 7) according to the above-described embodiment 3 in that it includes the support 52 (Fig. 6) according to the above-described embodiment 2 instead of the support 52s (Fig. 7), and that it includes a pillar 54 and a coil spring 55 between the inner end of the bolt 53 and the support 52.

[0053] The pillar 54 is an abutment member arranged to abut against the protruding portion 10a of the rotating shaft 10. The pillar 54 has a cylindrical portion and a flat portion. Therefore, the pillar 54 has a T-shape in side view. The pillar 54 has a cylindrical portion arranged on the load side and a flat portion arranged on the anti-load side. The pillar 54 has a cylindrical portion housed inside the coil spring 55. The pillar 54 has a cylindrical portion abutting against the rotating shaft 10 when the rotating shaft 10 is fixed. The flat portion of the pillar 54 always abuts against the bolt 53 regardless of whether the rotating shaft 10 is fixed or released. The flat portion of the pillar 54 has a disk-like shape, for example.

[0054] The coil spring 55 is an elastic member that biases the pillar 54 in the direction opposite to the load (the direction away from the protruding portion 10a of the rotating shaft 10). The coil spring 55 has a cylindrical shape.

[0055] In the rotating electric machine 1B (FIG. 7) according to the above-described third embodiment, when the rotating electric machine 1 is operated in a state in which the bolt 53 and the rotating shaft 10 are not in contact with each other, the bolt 53 may rotate due to vibration during operation and fall off. In the rotating electric machine 1C according to the fourth embodiment, therefore, a pillar member 54 and a coil spring 55 are disposed between the bolt 53 and the support 52 so that the bolt 53 does not rotate due to vibration during operation. In this way, the rotating electric machine 1C according to the fourth embodiment can absorb the vibration of the bolt 53 with the coil spring 55 and prevent the bolt 53 from falling off.

[0056] The pillar 54 is located between the bolt 53 and the rotating shaft 10, and is disposed so as to pass through a hole located at the center of the support 52. The pillar 54 has a dish-shaped end on the anti-load side so as to receive a repulsive force from the coil spring 55. The repulsive force of the coil spring 55 received by the pillar 54 is transmitted to the bolt 53 in contact with the pillar 54, and the bolt 53 is pressed against the outer blade cover 18, thereby preventing the bolt 53 from falling off.

[0057] The material of the pillar 54 is preferably a metal material, since it is sandwiched and compressed between the bolt 53 and the rotating shaft 10. The material of the coil spring 55 may be rubber or spring, but since the rotating electric machine 1 may be used outdoors, a material with excellent weather resistance is preferable. The bolt 53 is preferably an easy-to-turn material, such as a thumbscrew.

[0058] In this configuration, the bolt 53 does not need to be removed because it is held in the through hole H18s of the outer blade cover 18. Therefore, the rotating electric machine 1C can prevent the shaft stop device 50C (particularly the fixing device 51) from being lost and can reduce the effort required for storing the shaft stop device 50C (particularly the fixing device 51).

[0059] Furthermore, even when the rotating motor 1C is operated with the bolt 53 not in contact with the rotating shaft 10, the coil spring 55 can absorb the vibration of the bolt 53, thereby preventing the bolt 53 from falling off.

[0060] The present invention is not limited to the above-described embodiment, and includes various modified examples. For example, the above-described embodiment has been described in detail to easily explain the present invention, and is not necessarily limited to having all of the configurations described. In addition, it is possible to replace a part of the configuration of the embodiment with another configuration, and it is also possible to add another configuration to the configuration of the embodiment. In addition, it is possible to add, delete, or replace a part of each configuration with another configuration. [Explanation of symbols]

[0061] 1, 1A, 1B, 1C Rotating motor 10 Rotation axis 10a protruding part 10aa flat part 11 Bearings 12 Bearings 13 Bracket 14 Bracket 15 Outer Frame 16 Stator 17 Rotor 18 Outer feather cover (cover) 19 Outside feathers 20 Cover side part 50 Shaft stopper 51 Fixtures 51a Cylinder section 51b Protrusion 51c Grip 52,52a Support 52a Support 53 Bolt (fixture) 53s male thread 54 Pillar material (contact member) 55 Coil spring (elastic member) H18 Through hole (hole) H18a circular hole H18b Extension H18s Through hole (female thread) H52 Support side through hole (circular hole) H52s Support side through hole (female thread)

Claims

1. A rotating shaft having a rotor at its center; A stator disposed around the rotor in a circumferential direction; A pair of bearings that rotatably support both ends of the rotating shaft; A pair of brackets each holding a pair of the bearings; an outer frame that holds the pair of brackets and the stator; a cover fixed to the outer frame or the bracket; The rotating shaft has a protruding portion protruding outward from at least one of the brackets, the protruding portion of the rotating shaft is covered by the cover, The cover is integrally provided with a shaft stopper device for temporarily fixing the rotating shaft so that it cannot rotate. A rotating electric machine characterized by:

2. 2. The rotating electric machine according to claim 1, The shaft stopping device has a fixing tool that directly or indirectly contacts the protruding portion of the rotating shaft to temporarily fix the rotating shaft so as to be unrotatable, The cover has a through hole in a portion located in an extension direction of the rotation shaft, and the through hole movably holds the fixing device toward the protruding portion of the rotation shaft. A rotating electric machine characterized by:

3. 3. The rotating electric machine according to claim 2, The fixing tool has a cylindrical portion and a protrusion portion protruding radially from the cylindrical portion, The through hole has a shape including a circular hole having a size equal to the diameter of the cylindrical portion of the fastener, and a hollow groove-like extension portion that is formed by extending from the circular hole to the periphery so that the protrusion of the fastener can pass through. A rotating electric machine characterized by:

4. 3. The rotating electric machine according to claim 2, The fixing tool is disposed so as to protrude outward from the through hole so that a part of the fixing tool functions as a gripping part. A rotating electric machine characterized by:

5. 3. The rotating electric machine according to claim 2, a support disposed inside the cover and supporting the fixing device; The support has a support-side through hole provided in a portion located in an extension direction of the rotation shaft, The fixing tool is held movably toward the protruding portion of the rotating shaft by the through hole of the cover and the support tool side through hole. A rotating electric machine characterized by:

6. 6. The rotating electric machine according to claim 5, The fixing tool has a cylindrical portion and a protrusion portion protruding radially from the cylindrical portion, The through hole has a shape including a circular hole having a size equal to the diameter of the cylindrical portion of the fastener, and a hollow groove-like extension portion that is formed by extending from the circular hole to the periphery so that the protrusion of the fastener can pass through. A rotating electric machine characterized by:

7. 6. The rotating electric machine according to claim 5, A male screw is formed on the surface of the fastener, A female screw is formed on the inner surface of the through hole of the cover and the support side through hole. A rotating electric machine characterized by:

8. 3. The rotating electric machine according to claim 2, a contact member arranged to contact the protruding portion of the rotating shaft; an elastic member that biases the contact member in a direction away from the protruding portion of the rotating shaft; a support member disposed inside the cover and supporting the contact member and the elastic member; The support has a support-side through hole provided in a portion located in an extension direction of the rotation shaft, the fixing device is held by the through hole of the cover so as to be movable toward the end of the contact member, The abutment member is held by the elastic member and the support-side through hole so as to be movable toward the protruding portion of the rotating shaft. A rotating electric machine characterized by:

Images