Hoists and elevators

Abstract

Provided are a hoist and an elevator capable of stabilizing a cooling effect. The hoist comprises a housing provided with a plurality of stators, a main shaft supported by the housing, and a rotational solid that is supported by the main shaft and that rotates with respect to the housing. The rotational solid has a boss portion fitted to the main shaft, a rotating plate portion, a peripheral wall portion, and a plurality of ribs. The rotating plate portion has an intake hole for taking in air from the outside to the housing side. The housing has an exhaust hole located outside the intake hole in the radial direction of the main shaft. At a corner formed by the inner surface of the rotating plate portion and the inner peripheral surface of the peripheral wall portion, there is formed an air guide portion, which is a curved surface that guides the air entering the housing from the intake hole toward the stators.

Description

[Technical field]

[0001] The present invention relates to a hoist and an elevator. [Background technology]

[0002] In recent years, there has been a demand for miniaturization of elevator hoists. Reducing the size of a hoist reduces the heat dissipation surface area of ​​the motor. On the other hand, improving the output of a hoist increases the amount of heat generated. Therefore, miniaturizing a hoist causes problems in stabilizing motor performance. To address this issue, a hoist that sends cooling air between the rotor and the stator has been devised (see Patent Document 1). The hoist described in Patent Document 1 has a blower blade on the end face of the rotor. This allows the air that travels in the direction of the rotor's rotation axis as the rotor rotates to flow between the rotor and the stator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-220370 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the hoist described in Patent Document 1, the cooling air that has passed through the rotor flows approximately perpendicular to the inner wall plane of the housing. This causes the cooling air that has passed through the rotor to stagnate in the closed space inside the housing. As a result, the cooling air does not flow efficiently, and the cooling effect becomes unstable.

[0005] Another option is to provide holes for cooling air on the inner wall of the housing. However, the cooling air that flows through the rotor on the rotating body side would pass through the holes in the housing on the stationary part side, and the cooling air would not flow efficiently.

[0006] In consideration of the above problems, the present invention has an object to provide a hoist and elevator capable of stabilizing the cooling effect. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the object, the hoist includes a housing provided with a plurality of stators, a main shaft supported by the housing, and a rotating body supported by the main shaft. The rotating body has a sheave around which a main rope is wound, and a rotor facing the plurality of stators, and rotates relative to the housing. The rotating body has a boss portion that fits onto the main shaft, a rotating plate portion, a peripheral wall portion, and a plurality of ribs. The rotating plate portion is continuous with the outer periphery of the boss portion and is formed in a ring shape concentric with the main shaft. The peripheral wall portion protrudes from the outer periphery of the rotating plate portion to the housing side. The plurality of ribs are provided on the inner surface of the rotating plate portion that faces the housing side, and are arranged radially around the boss portion. The rotating plate portion has an intake hole that takes in air from the outside to the housing side. The housing has an exhaust hole that is arranged outside the intake hole in the radial direction of the main shaft. An air guide portion that is a curved surface that guides air entering the housing side from the intake hole to the stator side is formed at a corner portion formed by the inner surface of the rotating plate portion and the inner periphery of the peripheral wall portion. The rotor further includes a straightening plate disposed between the rotor plate and the plurality of stators and having a plurality of passage holes through which the air guided to the air guide portion passes. The elevator also includes a car, a counterweight connected to the car via a main rope, and the hoist around which the main rope is wound. Effect of the Invention

[0008] According to the hoist and elevator having the above configuration, the cooling effect can be stabilized. Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an overall configuration diagram of an elevator according to a first embodiment. [Diagram 2] FIG. 2 is a vertical cross-sectional view of the hoist according to the first embodiment. [Diagram 3]FIG. 2 is a perspective view showing a main part of a rotating body in the hoist according to the first embodiment. [Figure 4] FIG. 11 is a vertical cross-sectional view of a hoisting machine according to a second embodiment. [Diagram 5] FIG. 11 is a perspective view showing a main part of a housing in a hoisting machine according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same functions or configurations are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0011] 1. First embodiment [Elevator] First, the configuration of an elevator according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall configuration diagram of an elevator according to a first embodiment.

[0012] As shown in Fig. 1, elevator 1 is installed in a hoistway 110 formed in a building structure. Elevator 1 includes a car 120 for carrying passengers and luggage, a main rope 130, a counterweight 140, and a hoist 100. A machine room 160 is provided at the top of hoistway 110.

[0013] The hoisting machine 100 is disposed in a machine room 160. A main rope 130 is wound around the hoisting machine 100. The hoisting machine 100 is a device that winds up the main rope 130 to raise and lower the car 120. A deflection sheave 150 is provided in the vicinity of the hoisting machine 100. The main rope 130 is mounted on the deflection sheave 150.

[0014] The car 120 is formed in a hollow, substantially rectangular parallelepiped shape. The car 120 is connected to a counterweight 140 via a main rope 130. When the hoist 100 winds up the main rope 130, the car 120 and the counterweight 140 rise and fall in opposite directions.

[0015] The mass of the counterweight 140 is set to be approximately the same as the mass of the car 120 when no load is applied. Therefore, when the car 120 is unloaded, the tension ratio of the main rope 130 on the car 120 side and the counterweight 140 side becomes 1. This makes it possible to keep the output of the hoist 100 low when no load is applied.

[0016] [Hoisting machine] Next, the configuration of the hoisting machine 100 will be described with reference to Figs. Fig. 2 is a vertical cross-sectional view of the hoisting machine 100. Fig. 3 is a perspective view showing a main part of a rotating body in the hoisting machine 100.

[0017] As shown in FIG. 2, the hoist 100 has a housing 2, a main shaft 3, a rotating body 4, a sheave 5, multiple stators 6, a rotor 7, and a bearing 8. The rotating body 4 is rotatably supported by the housing 2 via the main shaft 3 and the bearing 8. Multiple stators 6 arranged in an annular shape are attached to the housing 2. A rotor 7 having an annular shape is attached to the rotating body 4. The rotor 7 is arranged radially outside the multiple stators 6. In other words, the hoist 100 is an outer rotor type hoist.

[0018] In the following description, the axial direction of the spindle 3 is defined as the X direction. The direction perpendicular to the axial direction of the spindle 3 and in which the car 120 ascends and descends is defined as the Y direction. The direction perpendicular to the X direction and the Y direction is defined as the Z direction. The housing 2 and the rotating body 4 face each other in the X direction. Furthermore, in the X direction, the rotating body 4 side is defined as one side. In the X direction, the housing 2 side is defined as the other side.

[0019] (Housing) 2, the housing 2 is supported by a support base 9. The support base 9 is fixed to a machine room 160 (see FIG. 1) provided at the top of the elevator shaft 110. The housing 2 faces the rotating body 4 in the X direction.

[0020] The housing 2 has a shaft support portion 21 that rotatably supports the main shaft 3 via bearings 8, a stator attachment portion 23 to which a plurality of stators 6 are attached, and a first connection portion 22 that connects the shaft support portion 21 and the stator attachment portion 23. The housing 2 also has an outer wall portion 25 that covers the outer periphery of the rotor 4, and a second connection portion 24 that connects the stator attachment portion 23 and the outer wall portion 25.

[0021] The shaft support part 21 is located approximately in the center on the YZ plane of the housing 2. The shaft support part 21 is formed in a cylindrical shape with its axial direction aligned in the X direction. The stator attachment part 23 is formed in a cylindrical shape with its axial direction aligned in the X direction. The inner diameter of the stator attachment part 23 is larger than the outer diameter of the shaft support part 21. The stator attachment part 23 is located radially outward of the shaft support part 21.

[0022] The first connection part 22 is made of an annular plate. The plane of the first connection part 22 is approximately perpendicular to the X direction. The inner peripheral side of the first connection part 22 is continuous with one end of the shaft support part 21 in the X direction. The outer peripheral side of the first connection part 22 is continuous with one end of the stator attachment part 23 in the X direction.

[0023] The outer wall portion 25 is formed in a cylindrical shape with its axial direction being in the X direction. The inner diameter of the outer wall portion 25 is larger than the outer diameter of the stator mounting portion 23. The outer wall portion 25 is located radially outside the stator mounting portion 23. The inner peripheral portion of the outer wall portion 25 and the outer peripheral portion of the stator mounting portion 23 face each other with a predetermined distance therebetween in the radial direction. A plurality of stators 6 and rotors 7 are arranged in the space between the outer wall portion 25 and the stator mounting portion 23.

[0024] The second connection part 24 is made of an annular plate. The plane of the second connection part 24 is approximately perpendicular to the X-direction. The inner periphery of the second connection part 24 is continuous with the end part of the stator attachment part 23 on the other side in the X-direction. The outer periphery of the second connection part 24 is continuous with the end part of the outer wall part 25 on the other side in the X-direction. A plurality of exhaust holes 241 are formed in the second connection part 24. The plurality of exhaust holes 241 face the gaps between the plurality of stators 6.

[0025] (main axis) The main shaft 3 is formed in a cylindrical shape with its axial direction in the X direction. The other side of the main shaft 3 in the X direction is rotatably supported by the housing 2 via a bearing 8. A rotor 4 is fitted to one side of the main shaft 3 in the X direction.

[0026] (Bearings) The bearing 8 is attached to the inner periphery of the shaft support portion 21. The bearing 8 is formed in an annular shape. The rotating body 4 engages with the bearing 8. The rotating body 4 is rotatably supported by the main shaft 3 via the bearing 8.

[0027] (rotating body) The rotating body 4 has a boss portion 41 that fits onto one side of the main shaft 3, a rotating plate portion 42 that is continuous with the outer periphery of the boss portion 41, a peripheral wall portion 43 that protrudes from the outer periphery of the rotating plate portion 42 toward the housing 2, and a flange portion 44 that is continuous with the peripheral wall portion 43.

[0028] The boss portion 41 is provided at approximately the center on the YZ plane of the rotor 4. The boss portion 41 is formed in a cylindrical shape with the X direction as the axial direction. The sheave 5 is attached to the outer periphery of the boss portion 41.

[0029] The rotating plate portion 42 is continuous with the middle portion of the boss portion 41 in the X direction. The rotating plate portion 42 is formed in a ring shape concentric with the boss portion 41 (main shaft 3). The surface of the rotating plate portion 42 facing one side in the X direction is an outer surface facing the outside of the hoisting machine 100. On the other hand, the surface of the rotating plate portion 42 facing the other side in the X direction is an inner surface facing the inside (housing 2 side) of the hoisting machine 100. The outer surface of the rotating plate portion 42 abuts against the end surface of the sheave 5 on the other side in the X direction.

[0030] The rotating plate portion 42 is provided with a plurality of intake holes 421. The plurality of intake holes 421 are arranged in a row along the circumferential direction of the main shaft 3 (rotating plate portion 42). In the radial direction of the main shaft 3, the plurality of intake holes 421 are arranged closer to the main shaft 3 than the plurality of exhaust holes 241 of the housing 2. In other words, in the radial direction of the main shaft 3, the plurality of exhaust holes 241 are arranged outside the plurality of intake holes 421. The plurality of intake holes 421 take in air from the outside of the hoisting machine 100 to the inside of the hoisting machine 100 (the housing 2 side).

[0031] A plurality of ribs 45 are formed on the inner surface of the rotating plate portion 42. The plurality of ribs 45 are arranged radially around the boss portion 41 (see FIG. 3). The plurality of ribs 45 are arranged at equal angular intervals in the circumferential direction around the boss portion 41. The plurality of ribs 45 extend in the radial direction of the rotating plate portion 42. One end of each of the ribs 45 is continuous with the boss portion 41. The other end of each of the ribs 45 is continuous with the inner circumferential surface of the peripheral wall portion 43.

[0032] The height of the multiple ribs 45 (height from the inner surface of the rotating plate portion) is lower than the height of the inner circumferential surface of the peripheral wall portion 43. Moreover, the height of the multiple ribs 45 is higher than half the height of the inner circumferential surface of the peripheral wall portion 43. The multiple air intake holes 421 described above are formed one by one between the ribs 45 adjacent to each other in the circumferential direction.

[0033] The peripheral wall portion 43 is formed in a cylindrical shape with its axial direction aligned in the X direction. The inner diameter of the peripheral wall portion 43 is larger than the outer diameter of the boss portion 41. The peripheral wall portion 43 is located radially outward of the boss portion 41 (see FIG. 2). One end of the peripheral wall portion 43 in the X direction is continuous with the inner surface of the rotating plate portion 42.

[0034] A rotor fixing groove 431 for attaching the rotor 7 is provided on the other end face in the X direction of the peripheral wall portion 43. The rotor fixing groove 431 is formed in an annular shape along the circumferential direction of the peripheral wall portion 43. The rotor 7 fits into the rotor fixing groove 431.

[0035] Flange portion 44 is made of a plate that protrudes outward in the radial direction of spindle 3 from the other end of peripheral wall portion 43 in the X direction. Flange portion 44 faces, in the X direction, the gap between stator 6 attached to housing 2 and rotor 7 attached to peripheral wall portion 43. Therefore, when viewed from one side in the X direction, the gap between stator 6 and rotor 7 is covered by flange portion 44.

[0036] 3, a plurality of spaces are formed on the inner surface side of the rotating plate portion 42, surrounded by the ribs 45, the boss portion 41, and the peripheral wall portion 43. These spaces are air passages 47 through which air taken in from the plurality of air intake holes 421 passes.

[0037] An air guide portion 46 is formed at a corner formed by the inner surface of the rotating plate portion 42 and the inner peripheral surface of the peripheral wall portion 43. The air guide portion 46 is a curved surface that guides the air that enters the inside of the hoisting machine 100 (the housing 2 side) from the multiple air intake holes 421 and passes through the air passage 47, toward the stator 6 side. The air guide portion 46 is formed up to the height of the rib 45.

[0038] Air guide portion 46 is formed symmetrically about the center line of boss portion 41. Air guide portion 46 smoothly continues to the inner surface of rotating plate portion 42 and the inner peripheral surface of peripheral wall portion 43. The shape of a vertical cross section (a cross section parallel to the XY plane) of air guide portion 46 is formed, for example, as an arc. In this case, the central angle of the arc is set to 90 degrees or less. The shape of the vertical cross section of air guide portion 46 is not limited to an arc, and may be a curved surface whose curvature changes gradually.

[0039] It is sufficient that the air guide portion 46 is at least half the height of the inner circumferential surface of the peripheral wall portion 43. This allows the air passing through the air passage 47 to be efficiently directed toward the stator 6 side. Also, it is possible to prevent the air in the air passage 47 from stagnating. Note that, in order to improve the efficiency of directing the air toward the stator 6 side and to reduce stagnation of the air, it is preferable that the air guide portion 46 is formed on the entire inner circumferential surface of the peripheral wall portion 43.

[0040] (Sheave) The sheave 5 is formed in a cylindrical shape with its axial direction being in the X direction. The sheave 5 is fitted to the outer periphery of one side in the X direction of the boss portion 41. The other end face of the sheave 5 in the X direction abuts against the outer surface of the rotating plate portion 42. Note that the multiple air intake holes 421 of the rotating plate portion 42 are provided at positions that do not overlap with the sheave 5 when viewed from the X direction.

[0041] An end face of the sheave 5 on one side in the X direction forms the same plane as an end face of the boss portion 41 on one side in the X direction. A plurality of grooves into which the main ropes 130 are wound are formed on the outer circumferential surface of the sheave 5. The sheave 5 rotates together with the boss portion 41.

[0042] (stator) The multiple stators 6 are attached to the outer periphery of the stator attachment portion 23 of the housing 2. The multiple stators 6 are lined up at predetermined intervals along the circumferential direction of the stator attachment portion 23 (main shaft 3). Each stator 6 is composed of an iron core and a coil wound around the iron core.

[0043] As described above, the multiple exhaust holes 241 provided in the housing 2 face the gaps between the multiple stators 6. Therefore, the air that has entered the inside of the hoisting machine 100 from the intake hole 421 of the rotating body 4 passes mainly through the gaps between the multiple stators 6 and is exhausted to the outside of the hoisting machine 100 from the multiple exhaust holes 241.

[0044] (Rotor) The rotor 7 is fixed in a rotor fixing groove 431 of the peripheral wall portion 43. The rotor 7 is formed in a cylindrical shape with its axial direction aligned in the X direction. The rotor 7 is made of a magnetic material. The rotor 7 faces the multiple stators 6 across an air gap in the radial direction of the stator attachment portion 23 (main shaft 3).

[0045] (Air intake) The plurality of air intake holes 421 provided in the rotor 4 are holes for taking in air from the outer surface side to the inner surface side of the rotating plate portion 42. Each of the plurality of air intake holes 421 is formed in a circular shape. The plurality of air intake holes 421 are arranged on the circumference of a circle having a first radius R1 centered on the rotation axis of the main shaft 3. Moreover, the plurality of air intake holes 421 are arranged one by one between adjacent ribs 45 in the circumferential direction of the main shaft 3.

[0046] Each air intake hole 421 is located on the boss portion 41 side of the above-mentioned air passage 47. Furthermore, distance R1 from the center of spindle 3 to air intake hole 421 is shorter than distance R2 from the center of spindle 3 to exhaust hole 241. The multiple air intake holes 421 do not overlap with the multiple exhaust holes 241 when viewed in the axial direction of spindle 3.

[0047] (Exhaust vent) The multiple exhaust holes 241 provided in the housing 2 are holes for exhausting air to the side of the housing 2 opposite the rotor 4. The multiple exhaust holes 241 are arranged on the circumference of a circle having a second radius R2 centered on the rotation axis of the main shaft 3. The multiple exhaust holes 241 face gaps between the multiple stators 6. The distance R2 from the center of the main shaft 3 to the exhaust holes 241 is greater than the distance R1 from the center of the main shaft 3 to the intake hole 421.

[0048] There is no particular limitation on the shape of the exhaust holes 241. The exhaust holes 241 may be formed, for example, in the shape of a rectangular slit or in the same circular shape as the intake hole 421. The exhaust holes 241 may also be set to the same shape as the shape of the gaps between the stators 6.

[0049] In the hoist 100 having such a configuration, when the rotating body 4 rotates, air outside the hoist 100 is sucked in through the multiple air intake holes 421. Then, the air sucked in through the multiple air intake holes 421 passes through the inside of the hoist 100 and is exhausted through the multiple exhaust holes 241. This cools the multiple stators 6 of the hoist 100, etc.

[0050] [Cooling effect of the hoist] Next, the cooling effect of the hoist 100 will be described. When the rotating body 4 rotates, centrifugal force acts on the air in the ventilation passage 47 on the inner surface side of the rotating plate portion 42. As a result, air moves in the ventilation passage 47 from the boss portion 41 side toward the peripheral wall portion 43. This air movement occurs along the extension direction of the multiple ribs 45.

[0051] When air moves in the air passage 47, the pressure on the boss portion 41 side in the air passage 47 drops. This causes a difference in air pressure to occur between the outer surface side and the inner surface side of the rotating plate portion 42. That is, the air pressure near the multiple air intake holes 421 on the inner surface side of the rotating plate portion 42 becomes negative relative to the air pressure on the outer surface side of the rotating plate portion 42. As a result, air is sucked into the hoisting machine 100 through the multiple air intake holes 421.

[0052] On the other hand, air flowing in the air passage 47 in a direction away from the boss portion 41 is guided by the air guide portion 46 toward the housing 2 side (the side of the multiple stators 6). As a result, the air flowing in the air passage 47 passes between the rotor 7 and the multiple stators 6 and between adjacent stators 6 and flows toward the second connection portion 24 side of the housing 2.

[0053] Then, air pressure rises near the multiple exhaust holes 241 of the second connection part 24 as air flows in from the rotating body 4 side. This generates an air pressure difference between the outer surface side and the inner surface side of the second connection part 24. That is, when the rotating body 4 rotates, the air pressure near the multiple exhaust holes 241 on the inner surface side of the second connection part 24 becomes positive relative to the air pressure on the outer surface side of the second connection part 24. As a result, the air inside the hoisting machine 100 is exhausted from the multiple exhaust holes 241.

[0054] Thus, in this embodiment, as the rotor 4 rotates, the pressure becomes negative relative to the outside air near the multiple air intake holes 421 of the rotating plate portion 42, and the pressure becomes positive relative to the outside air near the multiple exhaust holes 241 of the housing 2. Therefore, while the rotor 4 is rotating, cooling air can be constantly circulated inside the hoisting machine 100.

[0055] The air pressure distribution near the multiple air intake holes 421 and the multiple exhaust holes 241 does not depend on the rotation direction of the rotating body 4. That is, the same pressure distribution occurs whether the rotating body 4 rotates clockwise or counterclockwise. Therefore, the hoisting machine 100 can flow a stable cooling air inside, regardless of the rotation direction of the rotating body 4.

[0056] In this embodiment, an air guide portion 46 is provided at a corner formed by the inner surface of the rotating plate portion 42 and the inner peripheral surface of the peripheral wall portion 43. This allows the air moving toward the peripheral wall portion 43 due to the action of centrifugal force to be efficiently directed toward the housing 2. Furthermore, it is possible to prevent the air from stagnating in the ventilation path 47. As a result, the cooling effect can be stabilized.

[0057] In addition, in this embodiment, the exhaust holes 241 are arranged to face the gaps between the adjacent stators 6. This allows the air that has flowed between the adjacent stators 6 and been heated to be efficiently exhausted. As a result, the cooling effect of the stators 6 can be improved.

[0058] In this embodiment, the multiple ribs 45 are arranged at equal angular intervals in the circumferential direction around the boss portion 41. This makes the amount of air flowing through each air passage 47 uniform. As a result, air can flow uniformly from the boss portion 41 side to the peripheral wall portion 43 side. Therefore, the multiple stators 6 can be cooled uniformly.

[0059] 2. Second embodiment [Hoisting machine] Next, a hoist according to a second embodiment of the present invention will be described with reference to Figs. Fig. 4 is a vertical cross-sectional view of the hoisting machine according to the second embodiment Fig. 5 is a perspective view showing a main part of a housing in the hoisting machine according to the second embodiment.

[0060] As shown in Fig. 4, the hoist 101 according to the second embodiment has a similar configuration to the hoist 100 according to the first embodiment (see Fig. 2). The hoist 101 differs from the hoist 100 in that it includes a straightening plate 28. Therefore, the straightening plate 28 will be described here. The same components in the hoist 101 as those in the hoist 100 are denoted by the same reference numerals, and description thereof will be omitted.

[0061] The hoist 101 has a housing 12, a main shaft 3, a rotating body 4, a sheave 5, a plurality of stators 6, a rotor 7, and a bearing 8. The rotating body 4 is rotatably supported by the housing 12 via the main shaft 3 and the bearing 8.

[0062] (Housing) 4, the housing 12 has a shaft support portion 21, a first connection portion 22, a stator attachment portion 23, a second connection portion 24, an outer wall portion 25, and a straightening plate 28. The straightening plate 28 is attached to an end face of the shaft support portion 21 on one side in the X direction and to a flat surface of one side of the first connection portion 22.

[0063] The rectifying plate 28 is formed in a disk shape. A through hole 281 is provided in the center of the rectifying plate 28 to avoid interference with the main shaft 3. The center of the rectifying plate 28 coincides with the center of the main shaft 3. The rectifying plate 28 is set to a size that allows it to face multiple stators 6. In addition, the rectifying plate 28 is set to a size that allows its outer periphery not to interfere with the rotating body 4 and the rotor 7.

[0064] 5, a plurality of through holes 282 are provided in an area of ​​the straightening plate 28 facing the plurality of stators 6. The air guided by the air guide portion 46 toward the plurality of stators 6 passes through the plurality of through holes 282. The plurality of through holes 282 face the gaps between the plurality of stators 6. This allows the air guided by the air guide portion 46 toward the plurality of stators 6 to be efficiently directed toward the gaps between the plurality of stators 6. As a result, the plurality of stators 6 can be efficiently cooled.

[0065] The multiple through holes 282 are aligned along the radial direction of the rectifying plate 28. This allows the multiple through holes 282 to face the gaps between the multiple stators 6. Also, the multiple through holes 282 are aligned along the circumferential direction of the rectifying plate 28. Each of the multiple through holes 282 is formed in a substantially rectangular shape. The multiple through holes 282 become larger as they move radially outward. This allows the amount of air flowing toward the gaps between the multiple stators 6 to be increased.

[0066] Among the multiple through holes 282, the one located at the outermost position in the radial direction opens to the outer edge of the current plate 28. This makes it possible to prevent thin plate pieces that are easily damaged from being formed on the outer periphery of the current plate 28. As a result, the yield rate in the manufacture of the hoist 101 can be increased.

[0067] Among the multiple through holes 282, those that are located at the same radial position of the straightening plate 28 are set to the same size. This makes it possible to equalize the amount of air passing through the gaps between the multiple stators 6. As a result, it is possible to prevent unevenness in the cooling effect of the multiple stators 6.

[0068] The current plate 28 is provided with a plurality of fins 283. The plurality of fins 283 are formed in a substantially rectangular plate shape. The plurality of fins 283 protrude substantially perpendicularly from sides intersecting with the radial direction of the current plate at the plurality of through holes 282. The plurality of fins 283 protrude toward the plurality of stators 6.

[0069] The multiple fins 283 are formed by providing notches in the current plate 28 and bending the plate 28. When the multiple fins 283 are formed, the multiple through holes 282 are also formed. This makes it possible to easily form the multiple through holes 282 and the multiple fins 283.

[0070] The multiple fins 283 guide the air that has passed through the multiple through holes 282 in the axial direction of the main shaft 3. This allows the air that has passed through the multiple through holes 282 to travel straight and pass through the gaps between the multiple stators 6. As a result, it is possible to prevent unevenness in the air passing through the gaps between the multiple stators 6. Therefore, it is possible to stabilize the cooling effect.

[0071] 3. Summary As described above, the hoist 100 of the above-mentioned embodiment includes the housing 2 provided with the multiple stators 6, the main shaft 3 supported by the housing 2, and the rotating body 4 supported by the main shaft 3. The rotating body 4 has a sheave 5 around which the main rope 130 is wound, and a rotor 7 facing the multiple stators 6, and rotates with respect to the housing 2. The rotating body 4 has a boss portion 41 fitted to the main shaft 3, a rotating plate portion 42, a peripheral wall portion 43, and multiple ribs 45. The rotating plate portion 42 is continuous with the outer periphery of the boss portion 41 and is formed in a ring shape concentric with the main shaft 3. The peripheral wall portion 43 protrudes from the outer periphery of the rotating plate portion 42 toward the housing 2. The multiple ribs 45 are provided on the inner surface of the rotating plate portion 42, which is the surface of the rotating plate portion 42 facing the housing 2, and are arranged radially around the boss portion 41. The rotating plate portion 42 has an air intake hole 421 that takes in air from the outside to the housing 2 side. Housing 2 has exhaust hole 241 arranged outside air intake hole 421 in the radial direction of main shaft 3. Then, at the corner formed by the inner surface of rotating plate portion 42 and the inner circumferential surface of peripheral wall portion 43, air guide portion 46 is formed as a curved surface that guides air entering housing 2 from air intake hole 421 to stator 6. As a result, when the rotor 4 rotates, the air taken in through the air intake holes 421 moves toward the peripheral wall portion 43 by the action of centrifugal force. Then, the air guide portion 46 can direct the air moving toward the peripheral wall portion 43 toward the stator 6. As a result, the cooling effect can be stabilized.

[0072] The air guide 46 of the hoist 100 in the above-described embodiment is formed to reach more than half the height of the inner circumferential surface of the peripheral wall 43. This allows the air moving toward the peripheral wall portion 43 to be directed toward the stator 6 efficiently.

[0073] The air guide 46 of the hoist 100 in the above-described embodiment is formed to reach the height of the plurality of ribs 45 or higher. This allows air moving along the multiple ribs 45 toward the peripheral wall portion 43 to be directed toward the stator 6 efficiently.

[0074] The air guide 46 of the hoist 100 in the above-described embodiment is formed on the entire inner circumferential surface of the peripheral wall portion 43. This allows the air moving toward the peripheral wall portion 43 to be directed toward the stator 6 efficiently.

[0075] The hoist 101 in the above-described embodiment further includes a straightening plate 28 disposed between the rotating plate portion 42 and the plurality of stators 6. The straightening plate 28 has a plurality of passage holes 282 through which the air guided to the air guide portion 46 passes. This makes it possible to direct the air guided by the air guide portion 46 towards the multiple stators 6 toward a predetermined location relative to the multiple stators 6.

[0076] The multiple stators 6 of the hoisting machine 101 in the above-described embodiment are arranged at predetermined intervals in the circumferential direction of the main shaft 3. The multiple through holes 282 of the straightening plate 28 face the gaps between the multiple stators 6. This allows the air guided by the air guide portion 46 toward the multiple stators 6 to be efficiently directed toward the gaps between the multiple stators 6. As a result, the multiple stators 6 can be efficiently cooled.

[0077] Of the multiple through holes 282 of the straightening plate 28 of the hoisting machine 101 in the embodiment described above, those that are located at the same radial position of the main shaft 3 (the straightening plate 28) are set to the same size. This makes it possible to equalize the amount of air passing through the gaps between the multiple stators 6. As a result, it is possible to prevent unevenness in the cooling effect of the multiple stators 6.

[0078] The multiple through holes 282 of the current plate 28 of the hoisting machine 101 in the above-described embodiment are aligned in the radial direction of the main shaft 3 (current plate 28). This allows the plurality of through holes 282 to face the gaps between the plurality of stators 6.

[0079] The straightening plate 28 of the hoisting machine 101 in the embodiment described above has fins 283 that protrude from the periphery of the multiple through holes 282 towards the multiple stators 6 side. This makes it possible to guide the direction in which the air that has passed through the multiple through holes 282 travels. That is, the air that has passed through the multiple through holes 282 travels straight and passes through the gaps between the multiple stators 6. As a result, it is possible to prevent unevenness in the air passing through the gaps between the multiple stators 6.

[0080] The elevator 1 in the above-described embodiment includes a car 120, a counterweight 140 connected to the car 120 via a main rope 130, and a hoist 100 around which the main rope 130 is wound. As a result, when the rotor 4 of the hoist 100 rotates, the air taken in from the air intake 421 moves toward the peripheral wall 43 by the action of centrifugal force. Then, the air guide 46 can direct the air moving toward the peripheral wall 43 toward the stator 6. As a result, the cooling effect can be stabilized.

[0081] The above describes the hoist and elevator of the present invention, including their functions and effects. However, the hoist and elevator of the present invention are not limited to the above-mentioned embodiment, and various modifications are possible within the scope of the invention described in the claims.

[0082] In the above-described embodiment, the intake hole 421 is formed in a circular shape. However, the intake hole according to the present invention is not limited to a circular shape, and can be configured in a rectangular shape or various other shapes. The size of the intake hole according to the present invention may be any size that does not inhibit the generation of a pressure difference between the inner surface side and the outer surface side of the rotor caused by the centrifugal force due to the rotation of the rotor. The size of the intake hole according to the present invention is appropriately set depending on the size of the exhaust hole, etc.

[0083] In the above-described embodiment, the multiple ribs 45 arranged radially around the boss portion 41 are arranged at equal angular intervals in the circumferential direction around the boss portion 41. However, the multiple ribs according to the present invention do not have to be arranged at equal angular intervals in the circumferential direction around the boss portion 41. The multiple ribs according to the present invention can be appropriately shaped and arranged as long as they have a shape that can guide air flowing from the boss portion 41 side toward the outside in the radial direction. Since the multiple ribs 45 are arranged at equal angular intervals in the circumferential direction around the boss portion 41, the amount of air from the boss portion 41 side toward the outside in the radial direction is uniform in each air passage 47. As a result, air can be efficiently flowed toward the peripheral wall portion 43 side.

[0084] In the embodiment described above, the shape of the multiple through holes 282 in the rectifying plate 28 is substantially rectangular. However, the shape of the multiple through holes in the rectifying plate according to the present invention can be appropriately set to a circle, an ellipse, a polygon other than a rectangle, or the like.

[0085] In the above-described embodiment, the multiple fins 283 of the straightening plate 28 are formed in a substantially rectangular plate shape. However, the multiple fins of the straightening plate according to the present invention only need to have a flat surface that guides the air that has passed through the multiple through holes 282 toward the stator 6. Therefore, the shape of the multiple fins of the straightening plate according to the present invention can be set appropriately.

[0086] In the above-described embodiment, the elevator 1 having the machine room 160 above the elevator shaft 110 has been described as an example. However, the elevator according to the present invention may be a so-called machine room-less elevator that does not have a machine room.

[0087] The above-mentioned embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the configurations described. In addition, it is possible to add, delete, or replace part of the configuration of the embodiment with other configurations.

[0088] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but may also mean a "substantially parallel" or "substantially orthogonal" state that includes "parallel" and "orthogonal" and is within a range in which the respective functions can be exerted. [Explanation of symbols]

[0089] 1...Elevator, 2,12...Housing, 3...Main shaft, 4...Rotating body, 5...Sheave, 6...Stator, 7...Rotor, 8...Bearing, 9...Support base, 21...Shaft support portion, 22...First connection portion, 23...Stator mounting portion, 24...Second connection portion, 25...Outer wall portion, 28...Baffle plate, 41...Boss portion, 42...Rotating plate portion, 43...Circumference wall portion, 44...Flange portion, 45...Rib, 46...Air guide portion, 47...Ventilation passage, 100,101...Hoisting machine, 110...Hoistway, 130...Main rope, 150...Bending wheel, 160...Machine room, 241...Exhaust hole, 281...Through hole, 282...Passage hole, 283...Fin, 421...Intake hole, 431...Rotor fixing groove

Claims

1. A housing provided with a plurality of stators; A main shaft supported by the housing; a sheave supported by the main shaft and around which a main rope is wound; and a rotor facing the plurality of stators, the rotor having a rotor and rotating relative to the housing, The rotating body is a boss portion that fits onto the spindle; a rotating plate portion that is continuous with an outer periphery of the boss portion and formed in a ring shape concentric with the spindle; a peripheral wall portion that protrudes from the outer periphery of the rotating plate portion toward the housing; and a plurality of ribs that are provided on an inner surface of the rotating plate portion that faces the housing and are radially arranged around the boss portion, the rotating plate portion has an air intake hole for taking in air from the outside into the housing, the housing has an exhaust hole disposed outwardly of the intake hole in a radial direction of the main shaft, an air guide portion, which is a curved surface that guides air entering the housing side from the air intake hole to the stator side, is formed at a corner formed by an inner surface of the rotating plate portion and an inner circumferential surface of the peripheral wall portion; The air guide portion further includes a straightening plate disposed between the rotating plate portion and the plurality of stators and having a plurality of passage holes through which the air guided to the air guide portion passes. Hoisting machine.

2. The air guide portion is formed to reach at least half the height of the inner circumferential surface of the peripheral wall portion. A hoist as claimed in claim 1.

3. The air guide portion is formed to reach a height equal to or greater than the height of the plurality of ribs. A hoist as claimed in claim 1.

4. The air guide portion is formed on the entire inner circumferential surface of the peripheral wall portion. A hoist as claimed in claim 1.

5. The plurality of stators are arranged at predetermined intervals in the circumferential direction of the main shaft, The plurality of through holes of the rectifying plate face the gaps between the plurality of stators. A hoist as claimed in claim 1.

6. Among the plurality of passing holes, those located at the same radial position of the main shaft are set to the same size. A hoist according to claim 5.

7. The plurality of through holes are aligned in the radial direction of the main shaft. A hoist according to claim 5.

8. The straightening plate has fins protruding from the periphery of the plurality of through holes toward the plurality of stators. A hoist as claimed in claim 1.

9. A car, A counterweight connected to the car via a main rope; An elevator comprising: a hoist around which the main rope is wound; The hoisting machine includes: A housing provided with a plurality of stators; A main shaft supported by the housing; a sheave supported by the main shaft and around which the main rope is wound, and a rotor facing the stator; and a rotor that rotates relative to the housing; The rotating body is a boss portion that fits onto the spindle; a rotating plate portion that is continuous with an outer periphery of the boss portion and formed in a ring shape concentric with the spindle; a peripheral wall portion that protrudes from the outer periphery of the rotating plate portion toward the housing; and a plurality of ribs that are provided on an inner surface of the rotating plate portion that faces the housing and are radially arranged around the boss portion, the rotating plate portion has an air intake hole for taking in air from the outside into the housing, the housing has an exhaust hole disposed outwardly of the intake hole in a radial direction of the main shaft, an air guide portion, which is a curved surface that guides air entering the housing side from the air intake hole to the stator side, is formed at a corner formed by an inner surface of the rotating plate portion and an inner circumferential surface of the peripheral wall portion; The air guide portion further includes a straightening plate disposed between the rotating plate portion and the plurality of stators and having a plurality of passage holes through which the air guided to the air guide portion passes. Elevator.

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