Hoist and elevator

Abstract

The present application has: an exhaust hole provided in a housing and discharging air from the side of the housing where a stator is provided to the opposite side; and a rib provided as a convex rib protruding toward the housing side on the inner surface of a rotating body and extending radially with respect to the central axis of the main shaft. In addition, in the rotating body, an air intake hole is provided that intakes air from the outer surface side to the inner surface side of the rotating body and is provided at a position that is closer to the central axis of the main shaft than the exhaust hole.

Description

Technical Field

[0001] This invention relates to winches and elevators. Background Technology

[0002] In recent years, there has been a trend towards miniaturization in elevator winches. However, miniaturization reduces the motor's heat dissipation area, and increasing output leads to increased heat generation, thus causing problems with motor performance stability. In contrast, conventional methods, such as Patent Document 1, have disclosed structures that utilize air-blowing blades on the rotor's end face to allow airflow along the rotor's rotation axis between the rotor and stator as the rotor rotates, thus providing cooling.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-220370 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the winch rotates in opposite directions depending on the elevator's direction of ascent and descent. Therefore, in the motor described in Patent Document 1, the direction of the cooling air changes according to the rotor's rotation direction. Consequently, there is a problem that the cooling efficiency varies depending on the elevator's direction of ascent and descent.

[0008] Therefore, the object of the present invention is to provide a winch that delivers cooling air of the same direction into the winch even when the lifting direction is different and has a stable cooling effect, and an elevator using the winch.

[0009] Solution for solving the problem

[0010] To solve the aforementioned problems and achieve the objectives of this invention, the winch of this invention comprises a housing with an exhaust port, a main shaft, a rotating body with an intake port, a sheave, and ribs. The housing has a stator. The main shaft is supported on the housing. The rotating body is supported on the main shaft and has a rotor positioned opposite the stator, rotating relative to the housing by means of the stator and rotor. The sheave is provided on the outer surface of the rotating body opposite to the inner surface of the housing side along the axial direction of the main shaft. The exhaust port is provided in the housing and exhausts air from the side of the housing where the stator is located to the opposite side. The rib is a convex rib that protrudes from the inner surface of the rotating body toward the housing side and extends radially relative to the central axis of the main shaft. The intake port is provided in the rotating body and draws air in from the outer surface side of the rotating body toward the inner surface side, and is located at a distance from the central axis of the main shaft that is smaller than the distance from the central axis of the main shaft to the exhaust port.

[0011] The elevator of the present invention comprises: a car that moves up and down within a hoistway; a counterweight connected to the car via a main hoisting cable; and a winch that moves the car up and down by winding the main hoisting cable. Furthermore, the winch has the aforementioned structure.

[0012] Invention Effects

[0013] According to the present invention, cooling air of the same orientation can flow between the stator and rotor inside the winch regardless of the rotation direction of the winch, thus achieving stabilization of cooling efficiency. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the elevator according to the first embodiment of the present invention.

[0015] Figure 2 This is a cross-sectional structural diagram of the winch 100 of the first embodiment of the present invention along a direction orthogonal to the plane of rotation.

[0016] Figure 3 Viewed from the direction of the arrow Figure 2 A cross-sectional view of the winch 100 along line AA.

[0017] Figure 4 This is a cross-sectional view of the winch 200 of the second embodiment of the present invention along a direction orthogonal to the plane of rotation.

[0018] Figure 5 Viewed from the direction of the arrow Figure 4 The cross-sectional structure diagram of the winch 200 along line BB. Detailed Implementation

[0019] Hereinafter, an example of an elevator and winch according to an embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the present invention is not limited to the following example. In the figures described below, common components are labeled with the same reference numerals.

[0020] 1. First Implementation Method

[0021] 1-1. The structure of an elevator

[0022] First, refer to Figure 1 The structure of elevator 1 according to the first embodiment of the present invention (hereinafter referred to as "this embodiment") will be described. Figure 1 This is a schematic structural diagram showing an example of the structure of elevator 1 according to this embodiment.

[0023] like Figure 1As shown, the elevator 1 of this embodiment moves up and down within a lift path 110 formed within a building structure. The elevator 1 includes a car 120 for carrying people and goods, a main hoist 130, a counterweight 140, and a winch 100. The lift path 110 is formed within a building structure, and a machine room 160 is provided at its top.

[0024] The winch 100 is located in the machine room 160 and raises and lowers the car 120 by winding the main hoisting cable 130. In addition, a guide pulley 150 for supporting the main hoisting cable 130 is provided near the winch 100.

[0025] The counterweight 140 is set to a mass approximately the same as that of the car 120 when unloaded. Therefore, when the car 120 is unloaded and contains no goods or people, the tension ratio of the main slings 130 on the car 120 side to that on the counterweight 140 side is 1. As a result, the output of the winch 100 when unloaded can be kept low.

[0026] The car 120 is formed in a hollow, generally rectangular shape. The car 120 is connected to the counterweight 140 via the main hoist 130 and moves up and down within the lifting path 110.

[0027] 1-2. Structure of the winch

[0028] Next, refer to Figure 2 as well as Figure 3 The winch 100 of this embodiment will be described. Figure 2 This is a cross-sectional view of the winch 100 of this embodiment along a direction orthogonal to the plane of rotation. Additionally, Figure 3 Viewed from the direction of the arrow Figure 2 A cross-sectional view of the winch 100 along line AA.

[0029] like Figure 2 As shown, the winch 100 includes a housing 2, a main shaft 3, a rotating body 4, a pulley 5, a motor stator 6 (the stator of the present invention), a motor rotor 7 (the rotor of the present invention), and a bearing 8. Furthermore, in this embodiment, the winch 100 is provided with an intake port 9 and an exhaust port 10 for internal cooling airflow. In this embodiment, an external rotor type winch 100 with the motor rotor 7 arranged on the outer side of the motor stator 6 in the radial direction will be described as an example.

[0030] In the following description, the axial direction of the main shaft 3 is defined as the X direction. Furthermore, the vertical direction relative to the axial direction of the main shaft 3 and the lifting direction of the car 120 is defined as the Y direction. Additionally, the direction orthogonal to both the X and Y directions is defined as the Z direction. Furthermore, in the following description, in the X direction, the side where the housing 2 is installed is defined as the other side, and the side where the pulley 5 is installed is defined as one side. And, in the Y direction, the upper side of the lifting path 110 is defined as the upper side, and the lower side is defined as the lower side.

[0031] [case]

[0032] The housing 2 has an outer cover 11 for mounting the main shaft 3, a stator mounting portion 13 for fixing the motor stator 6, and a first connecting portion 12 connecting the outer cover 11 and the stator mounting portion 13. In addition, the housing 2 has an outer wall portion 15 covering the outer peripheral surface of the motor rotor 7 mounted on the rotating body 4 (described later), and a second connecting portion 14 connecting the stator mounting portion 13 and the outer wall portion 15.

[0033] The outer cover 11 is located approximately at the center of the YZ plane of the housing 2 and is composed of a cylindrical member with the X direction as the axial direction. A bearing 8 with the X direction as the axial direction is provided on the inner circumferential surface of the outer cover 11. The end of a main shaft 3 with the X direction as the axial direction is fitted into the inner circumferential surface of the bearing 8, and the main shaft 3 is supported so that it can rotate.

[0034] The stator mounting portion 13 is constructed from a cylindrical member having an inner diameter larger than the outer diameter of the outer cover 11 and with the X direction as the axial direction, and is disposed on the outer side of the outer cover 11 in the radial direction. Furthermore, a motor stator 6 is fixed to the outer peripheral surface of the stator mounting portion 13 in the radial direction. A first connecting portion 12 is provided at one end of the outer cover 11 and the stator mounting portion 13 in the X direction, and is constructed from a plate-shaped member that connects the outer cover 11 and the stator mounting portion 13.

[0035] The outer wall portion 15 is constructed of a cylindrical member with an inner diameter larger than that of the stator mounting portion 13 and an inner circumferential surface formed in a circular shape in the YZ plane, with the X direction as the axial direction, and is disposed on the outer side of the stator mounting portion 13 in the radial direction. The outer wall portion 15 is also disposed on the outer side of the stator mounting portion 13 in the radial direction. A motor stator 6 and a motor rotor 7 mounted on the rotating body 4 (described later) are disposed in the space between the outer wall portion 15 and the stator mounting portion 13. Furthermore, the rotating body 4 (described later) is disposed on one side of the outer wall portion 15 in the X direction.

[0036] The second connecting portion 14 is provided at the end of the stator mounting portion 13 and the outer wall portion 15 on the other side in the X direction, and is composed of a plate-shaped member that connects the stator mounting portion 13 and the outer wall portion 15. Furthermore, the second connecting portion 14 is provided with an exhaust port 10 for discharging air from the side of the housing 2 where the motor stator 6 is mounted to the other side. The exhaust port 10 is, for example, provided at a position opposite the gap between adjacent motor stators 6. The exhaust port 10 will be described in detail later.

[0037] [Main Spindle]

[0038] The main shaft 3 is composed of a cylindrical member with the X direction as its axial direction. The other end of the main shaft 3 in the X direction is cantilevered to the outer cover 11 by being supported on the inner circumference of the bearing 8 provided in the housing 2. In addition, one side of the main shaft 3 is fitted into the rotating body 4.

[0039] [Solid of Revolution]

[0040] The rotating body 4 has a protrusion 16 that fits into one side of the main shaft 3, a rotor mounting part 18 for mounting the motor rotor 7, a third connecting part 17 that connects the protrusion 16 and the rotor mounting part 18, and a flange part 19 that is continuously provided on the outer side of the rotor mounting part 18 in the radial direction.

[0041] The protrusion 16 is located approximately at the center of the YZ plane of the rotating body 4 and is constructed of a cylindrical member with the X direction as the axial direction. A side of the main shaft 3 is fitted into the inner circumferential surface of the protrusion 16. The rotating body 4 is supported by the main shaft 3 so that it can rotate relative to the housing 2. A pulley 5, described later, is fixed to the outer circumferential surface of the protrusion 16 in the radial direction on one side of the protrusion 16.

[0042] The rotor mounting portion 18 is constructed of a cylindrical member having an inner diameter larger than the outer diameter of the protrusion 16 and with the X direction as the axial direction, and is disposed on the outer side of the protrusion 16 in the radial direction. A motor rotor 7 is fixed to the other end of the rotor mounting portion 18. The motor rotor 7 fixed to the rotor mounting portion 18 is disposed between the motor stator 6 and the outer wall portion 15 of the housing 2.

[0043] The third connecting portion 17 is mounted on the outer peripheral surface of the protrusion 16, extending from a position opposite to the location where the sheave 5 is mounted, toward the end of the rotor mounting portion 18, and is composed of a plate-shaped member parallel to the YZ plane. Furthermore, the other side of the third connecting portion 17 (hereinafter, the inner surface) is configured to be positioned further away from the other end face of the protrusion 16. That is, the other side of the protrusion 16 is configured to protrude toward the housing 2 from the inner surface of the third connecting portion 17. An air intake hole 9 (described later) is provided in the third connecting portion 17, and ribs 20 (described later) are formed therein.

[0044] The flange portion 19 is composed of a plate-shaped member that extends radially outward from the end face of the rotor mounting portion 18 on the other side, beyond the outer peripheral surface of the outer wall portion 15 of the housing 2. The flange portion 19 covers the gap between the motor rotor 7 and the outer wall portion 15 of the housing 2.

[0045] [Rope Reel]

[0046] The pulley 5 is a cylindrical component with the X-direction as the axial direction, capable of winding the main sling 130 around its outer circumferential surface. Furthermore, the inner circumferential surface of the pulley 5 is fixed to the outer circumferential surface of the protrusion 16 on the outer side of the protrusion 16 in the radial direction and on one side of the protrusion 16 in the X direction. Because the pulley 5 is fixed to the outer circumferential surface of the protrusion 16 of the rotating body 4, it rotates relative to the housing 2 as the rotating body 4 rotates.

[0047] [Motor stator]

[0048] The motor stator 6 consists of an iron core and coils wound around the iron core. Multiple motor stators 6 are mounted on the outer peripheral surface of the stator mounting section 13. The multiple motor stators 6 are arranged at predetermined intervals, for example, at equal intervals.

[0049] [Motor rotor]

[0050] The motor rotor 7 is constructed using a component formed of a magnetic material and is fixed to the end face of the rotor mounting portion 18 on the other side in the X direction. In addition, the motor rotor 7 is fixed to the rotor mounting portion 18 in a radially opposed manner with respect to the motor stator 6 mounted on the outer peripheral surface of the stator mounting portion 13 through an air gap.

[0051] [rib]

[0052] Rib 20 is provided in a convex shape on the inner surface of the third connecting part 17 of the rotating body 4 toward the housing 2. Additionally, as... Figure 3 As shown, the ribs 20 are mounted on the inner surface of the third connecting portion 17 from the outer periphery of the protrusion 16 to the inner periphery of the rotor mounting portion 18, and extend radially relative to the central axis of the main shaft 3. That is, the ribs 20 are arranged to extend radially outward from the side of the protrusion 16. In addition, in this embodiment, multiple ribs 20 are arranged axially symmetrically with respect to the central axis of the main shaft 3.

[0053] In this embodiment, the other side of the protrusion 16 is configured to protrude from the inner surface of the third connecting portion 17 toward the housing 2, and is provided with the aforementioned rib 20, thereby forming a plurality of regions surrounded by the rib 20 and the protrusion 16. Figure 3 As shown, the areas separated by the rib 20, the protrusion 16 and the rotor mounting portion 18 become the ventilation path 21 through which air drawn in from the intake port 9 passes, as described later.

[0054] The width of the rib 20 along the circumferential direction of the rotating body 4 can be varied, but it is formed to a width that sufficiently ensures the ventilation passage 21. Furthermore, in this embodiment, the rib 20 is formed with a constant width in the circumferential direction of the rotating body 4, but it is not limited to this and various variations are possible. In this case, it is also designed to have a shape that does not obstruct the flow of air through the ventilation passage 21.

[0055] [Intake port]

[0056] The air intake hole 9 is a hole for drawing air from the outer surface side to the inner surface side of the rotating body 4, and multiple holes are provided so that the third connecting part 17 passes through it. Additionally, as... Figure 2 As shown, in this embodiment, a plurality of suction holes 9 are arranged on the circumference of a circle with a predetermined radius R1 centered on the rotation axis of the main shaft 3. Furthermore, in this embodiment, one suction hole 9 is arranged between each adjacent rib 20, and is formed on the side of the protrusion 16 within the ventilation passage 21 surrounded by the rib 20 and the protrusion 16. In this embodiment, the distance R1 from the center of the main shaft 3 to the suction hole 9 is set to be smaller than the distance R2 from the center of the main shaft 3 to the exhaust hole 10 (described later). Additionally, the suction holes 9 are arranged in a manner that they do not overlap with the exhaust hole 10 in a direction parallel to the central axis of the main shaft 3.

[0057] In this embodiment, the suction port 9 is as follows Figure 2 It is designed to be circular as shown, but is not limited to this; it can be rectangular or other shapes. In addition, the size of the air intake 9 should be such that it does not hinder the generation of the pressure difference between the inner and outer surfaces of the rotating body 4 caused by the centrifugal force generated by the rotation of the rotating body 4, and should be appropriately set according to the size of the exhaust 10, etc.

[0058] [Exhaust port]

[0059] The exhaust port 10 is a hole for discharging air from the side of the housing 2 where the motor stator 6 is mounted to the opposite side. Multiple exhaust ports 10 are provided so that the second connecting portion 14 passes through them. In this embodiment, although not shown in the figure, the multiple exhaust ports 10 are arranged on the circumference of a circle with a predetermined radius R2 centered on the rotation axis of the main shaft 3, and are positioned opposite the gap between the motor stator 6 mounted on the outer peripheral surface of the stator mounting portion 13. Furthermore, in this embodiment, the distance R2 from the center of the main shaft 3 to the exhaust port 10 is set to be larger than the distance R1 from the center of the main shaft 3 to the intake port 9.

[0060] The shape of the vent 10 is not particularly limited, but it can be, for example, formed by a rectangular slit, or similar. Figure 3 The air intake vent 9 shown is also round in shape and can be made of various shapes.

[0061] In the winch with the above structure, when an alternating current flows through the motor stator 6, a magnetic field rotating circumferentially along the rotating body 4 is generated, thus exerting an electromagnetic force on the motor rotor 7. As a result, the rotating body 4 and the sheave 5 rotate as a unit around the main shaft 3. Furthermore, the rotation of the sheave 5 winds the main hoisting cable 130 into the sheave 5. Additionally, in the winch 100 of this embodiment, as the rotating body 4 rotates, external air is drawn into the winch 100 through the intake port 9 and discharged through the exhaust port 10. This cools the winch 100. The cooling mechanism of the winch 100 will be described in detail below.

[0062] 1-3. Cooling mechanism of the winch

[0063] In this embodiment, under the centrifugal force generated by the rotation of the rotating body 4, air moves from the rotation axis side of the main shaft 3 toward the radius outside the rotating body 4 in the ventilation passage 21 on the inner surface side of the rotating body 4. This air movement occurs along the extension direction of the rib 20. As a result, the pressure on the central axis side of the main shaft 3 decreases on the inner surface side of the rotating body 4, and a pressure difference is generated on the outer surface side and the inner surface side of the rotating body 4 on the central axis side of the main shaft 3. That is, due to the rotation of the rotating body 4, the air pressure on the inner surface side near the air intake 9 of the rotating body 4 becomes negative relative to the outer surface of the rotating body 4.

[0064] On the other hand, under the action of centrifugal force, air flowing in the ventilation passage 21 in a direction away from the rotation axis of the rotating body 4 flows towards the housing 2 through the space between the motor rotor 7 and the motor stator 6, and between adjacent motor stators 6. Thus, near the exhaust port 10 of the second connection portion 14 of the housing 2, the pressure rises due to the air flowing in from the rotating body 4 side, creating a pressure difference between the outer and inner surfaces of the housing 2 near the second connection portion 14. That is, due to the rotation of the rotating body 4, the air pressure on the inner surface near the exhaust port 10 of the housing 2 becomes positive relative to the outer surface of the housing 2.

[0065] Furthermore, by creating a negative pressure relative to the external gas on the inner surface side near the intake port 9, air is drawn in from the outer surface side through the intake port 9. On the other hand, by creating a positive pressure relative to the external gas on the inner surface side near the exhaust port 10, air on the inner surface side of the housing 2 is discharged to the outer surface side. Thus, in this embodiment, as the rotating body 4 rotates, a pressure distribution is formed such that the inner surface near the intake port 9 is under negative pressure relative to the external gas and the inner surface near the exhaust port 10 is under positive pressure relative to the external gas, so that cooling air can always flow into the interior of the winch 100 during the rotation of the rotating body 4.

[0066] The pressure distribution near the intake port 9 and exhaust port 10 generated by the rotation of the rotating body 4 is independent of the rotation direction of the rotating body 4. That is, the pressure distribution is generated even if the rotation direction of the rotating body 4 is different. Therefore, in the winch 100 of this embodiment, a stable cooling airflow can be directed into the winch 100 regardless of the rotation direction of the rotating body 4.

[0067] Furthermore, in this embodiment, ribs 20 are formed on the back side of the rotating body 4. Therefore, air on the inner surface side of the rotating body 4 flows radially along the ribs 20, resulting in a radial flow of air on the inner surface side of the rotating body 4. Moreover, in this embodiment, by arranging the multiple ribs 20 as axisymmetric, air flows radially along the axisymmetric ventilation path 21, thus stabilizing the airflow.

[0068] In this embodiment, the size and number of intake holes 9, the size and number of exhaust holes 10, etc., can be designed to make the pressure distribution inside and outside the winch 100 the pressure distribution described above, and various methods can be adopted. That is, as long as the pressure distribution is formed such that the inner surface near the intake hole 9 is under negative pressure compared to the external gas and the inner surface near the exhaust hole 10 is under positive pressure compared to the external gas as the rotating body 4 rotates, it is acceptable.

[0069] Furthermore, in this embodiment, the exhaust port 10 is positioned opposite the gap between the adjacent motor stator 6. This allows air flowing from between the motor stators 6 to be discharged outwards, effectively cooling the motor stator 6.

[0070] In this embodiment, the rib 20 is set to be axisymmetric, but it is not limited to this. The rib 20 may not be set to be axisymmetric, as long as it has a shape that can guide the air flowing from the central axis of the main shaft 3 toward the outward direction on the inner surface side of the third connecting part 17. By setting the rib 20 to be axisymmetric as in this embodiment, the air flows evenly in the radial direction on the inner surface side of the third connecting part 17, thus enabling efficient airflow.

[0071] As described above, in this embodiment, by providing radial ribs 20 on the inner surface of the rotating body 4, the airflow that flows radially outward with the rotation of the rotating body 4 can be made radial. Furthermore, by providing an intake hole 9 near the rotation axis of the rotating body 4, and an exhaust hole 10 opposite the gap between the housing 2 and the motor stator 6, and by making the diameter R1 of the intake hole 9's array smaller than the diameter R2 of the exhaust hole 10's array, airflow can be formed inside the winch 200 where differential pressure is generated. Moreover, the cooling airflow can be caused by the differential pressure within the winch 200 generated by the rotation of the rotating body 4.

[0072] In this embodiment, the intake hole 9 is provided at the third connecting part 17. However, the location of the intake hole 9 is not limited to any specific location, as long as the distance R1 from the center axis of the main shaft 3 to the intake hole 9 is smaller than the distance R2 from the center axis of the main shaft 3 to the exhaust hole 10. Hereinafter, as a second embodiment, an example in which the intake hole 9 is located at a different position than in the first embodiment will be described.

[0073] 2. Second Implementation Method

[0074] Figure 4 This is a cross-sectional structural view of the winch 200 according to the second embodiment of the present invention along a direction orthogonal to the plane of rotation. Furthermore, Figure 5 Viewed from the direction of the arrow Figure 4 The cross-sectional structural diagram is obtained by measuring the section along line BB of the winch 200. It should be noted that... Figure 5 In order to make the position of the air intake 30 easier to understand, it is shown in the diagram. Figure 3 Cross-sectional views at different locations. The winch 200 of this embodiment can also be applied in the same way as the first embodiment. Figure 1 Elevator 1 is shown. Additionally, in Figure 4 as well as Figure 5 In the middle, to and Figure 2 as well as Figure 3 The corresponding parts are labeled with the same reference numerals, and repeated descriptions are omitted.

[0075] 30 air intake holes Figure 4As shown, a plurality of protrusions 16 are provided on the rotating body 4, and are arranged on the circumference of a circle with a predetermined radius R3 centered on the rotation axis of the main shaft 3. The intake port 30 is composed of an elongated port 30a and a transverse port 30b. The elongated port 30a is formed in the protrusion 16 parallel to the rotation axis of the main shaft 3, extending from the outer surface to the inner surface of the rotating body 4. The transverse port 30b is provided from the side circumferential surface of the protrusion 16 in a direction orthogonal to the rotation axis of the main shaft 3, and connects the elongated port 30a to the ventilation passage 21. In this embodiment, air drawn in from the intake port 30 flows into the ventilation passage 21 through the elongated port 30a and the transverse port 30b.

[0076] In this embodiment, similarly to the first embodiment, the area surrounded by the rib 20 and the protrusion 16 on the back side of the rotating body 4 becomes the ventilation passage 21. Furthermore, air drawn in from the suction hole 30 flows into the ventilation passage 21 through the transverse hole 30b provided in the protrusion 16.

[0077] In this embodiment, similarly to the first embodiment, under the centrifugal force generated by the rotation of the rotating body 4, air on the inner surface side of the rotating body 4, near the rotation axis of the main shaft 3, flows outward in a radial direction. Consequently, air near the protrusion 16 of the ventilation passage 21 flows outward in a radial direction, creating a negative pressure near the intake port 30 compared to the external air. Therefore, air is drawn in from the intake port 30 and flows towards the exhaust port 10 via the ventilation passage 21. Thus, in this embodiment, cooling air can also flow into the winch 200 along with the rotation of the rotating body 4.

[0078] In this invention, unlike conventional structures that use air-blowing blades with fluid shapes to deliver cooling air, cooling air of the same direction can be delivered to the inside of the winch regardless of the lifting direction of the elevator car, thus achieving stable cooling efficiency.

[0079] In the above embodiments, a winch installed in an elevator with a machine room was described, but the winch of the present invention can also be applied to elevators without a machine room. Furthermore, while the above embodiments used an external rotor type winch as an example, the present invention can also be applied to internal rotor type winches.

[0080] Furthermore, the above embodiments have been described in detail to facilitate understanding of the present invention, and are not necessarily limited to having all the described structures. For example, a part of the structure of the embodiments can be replaced with other structures, and other structures can also be added to the structure of the embodiments. In addition, regarding a part of the structure of the embodiments, other structures can be added, deleted, or replaced.

[0081] Explanation of reference numerals in the attached figures

[0082] 1: Elevator; 2: Shell; 3: Main shaft; 4: Rotating body; 5: Sheave; 6: Motor stator; 7: Motor rotor; 8: Support platform; 9, 30: Intake port; 10: Exhaust port; 11: Outer cover; 12: First connecting part; 13: Stator mounting part; 14: Second connecting part; 15: Outer wall part; 16: Protrusion part; 17: Third connecting part; 18: Rotor mounting part; 19: Flange part; 20: Rib; 21: Ventilation passage; 30a: Long hole part; 30b: Horizontal hole part; 100: Winch; 110: Lifting path; 130: Main sling; 140: Counterweight; 150: Steering pulley; 160: Machine room.

Claims

1. A winch, wherein, The winch has the following features: The housing, which is provided with a stator; The main shaft is supported by the housing; A rotating body supported on the main shaft and having a rotor disposed opposite the stator, and rotating relative to the housing by means of the stator and the rotor; A pulley is disposed on the outer surface of the housing side opposite to the inner surface of the rotating body in the axial direction of the main shaft; as well as The rib is a convex rib that protrudes from the inner surface of the rotating body toward the housing side and extends radially relative to the central axis of the main shaft. The housing is provided with an exhaust port for discharging air from the side where the stator is located to the opposite side. In the rotating body, an air intake hole is provided at a position where the distance from the central axis of the main shaft is smaller than the distance from the central axis of the main shaft to the exhaust hole, for drawing air from the outer surface side to the inner surface side of the rotating body. The rotating body has a protrusion that engages with one side of the main shaft. Multiple ribs are arranged in a radially outward direction from the protrusion side toward the rotating body and are axially symmetrical with respect to the central axis of the main shaft. The air intake is disposed between adjacent ribs and is formed on the side of the protrusion in the air passage surrounded by the ribs and the protrusion.

2. The winch according to claim 1, wherein, The vent holes are provided in a plurality of manner at predetermined intervals in the circumferential direction relative to the central axis of the main shaft.

3. The winch according to claim 1, wherein, The air intake holes are provided at predetermined intervals in a circumferential direction relative to the central axis of the main shaft.

4. The winch according to claim 2, wherein, The stator is provided in multiple units at predetermined intervals in a circumferential direction relative to the central axis of the main shaft. The vent is located opposite the gap between the adjacent stators.

5. The winch according to claim 1, wherein, Multiple air intake holes are arranged along the circumferential direction relative to the central axis of the main shaft. The stator is provided in multiple units at predetermined intervals in a circumferential direction relative to the central axis of the main shaft. The exhaust vents are located opposite the gap between the adjacent stators and are arranged in a plurality of such vents along a circumferential direction relative to the central axis of the main shaft.

6. An elevator, wherein, The elevator has the following features: The car moves up and down within the elevator shaft; A counterweight, which is connected to the car via main slings; and A winch, which raises and lowers the car by winding the main hoisting cable. The winch has the following features: The housing, which is provided with a stator; The main shaft is supported by the housing; A rotating body supported on the main shaft and having a rotor disposed opposite the stator, and rotating relative to the housing by means of the stator and the rotor; A pulley is disposed on the outer surface of the housing side opposite to the inner surface of the rotating body in the axial direction of the main shaft; as well as The rib is a convex rib that protrudes from the inner surface of the rotating body toward the housing side and extends radially relative to the central axis of the main shaft. The housing is provided with an exhaust port for discharging air from the side where the stator is located to the opposite side. In the rotating body, an air intake hole is provided at a position where the distance from the central axis of the main shaft is smaller than the distance from the central axis of the main shaft to the exhaust hole, for drawing air from the outer surface side to the inner surface side of the rotating body. The rotating body has a protrusion that engages with one side of the main shaft. Multiple ribs are arranged in a radially outward direction from the protrusion side toward the rotating body and are axially symmetrical with respect to the central axis of the main shaft. The air intake is disposed between adjacent ribs and is formed on the side of the protrusion in the air passage surrounded by the ribs and the protrusion.

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