Hoists and elevators

Abstract

Provided is a hoist and an elevator for which bearing replacement work can easily be performed. The hoist comprises: a frame to which a stator is provided; a main shaft supported by the frame; a bearing attached to the main shaft; and a rotary body that is supported in a rotatable manner by the main shaft via the bearing. The rotary body includes: a sheave around which a main rope is wound; and a rotor that faces the stator. Further, the rotary body includes: a housing that fits to the bearing and can rotate around the main shaft; and a drum which is coupled with the housing and to which the sheave and the rotor are attached.

Description

[Technical Field]

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

[0002] Conventionally, elevators include a car, a counterweight, a rope connecting the car and the counterweight, and a hoist around which the rope is wound. Patent Document 1 describes a hoist that aims to improve maintainability and save space.

[0003] The hoist described in Patent Document 1 includes a motor unit having a stator and a rotor arranged outside the stator, a rotating unit including a sheave directly connected to the rotor and a rotating shaft for rotatably supporting the sheave, and a braking mechanism for applying a brake to the sheave. The rotating shaft is supported by a frame via a first bearing provided on the stator of the motor unit and extending close to the rotating unit, and a second bearing provided on the fixed unit.

[0004] The first bearing unit, the second bearing unit, and the rotating unit are assembled as an integrated bearing unit. The integrated bearing unit is removed from the frame of the hoist as a unit, or attached to the frame of the hoist. The integrated bearing unit is removed from and attached to the frame when performing maintenance or replacing the motor unit, sheave, first bearing unit, second bearing unit, etc. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-308312 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the hoist described in Patent Document 1, the rotating shaft of the integrated bearing unit is directly connected to the sheave. Therefore, when removing the integrated bearing unit from the frame of the hoist, it is necessary to remove the sheave and rotor along with the integrated bearing unit. As a result, when replacing the bearing unit at the elevator installation site, it is necessary to remove the rope wound around the sheave and remove the sheave together with the integrated bearing unit. This makes the work of replacing the bearing unit complicated, preventing the shortening of the work time.

[0007] Additionally, the sheave is directly connected to the rotor. Therefore, when removing the sheave, the rotor must also be removed. This means that a large working space is required to take into account the size of the rotor when removing the sheave. As a result, when replacing bearings at the elevator installation site, it is necessary to secure a large working space that takes into account the size of the rotor before starting the work.

[0008] In consideration of the above problems, the present invention aims to provide a hoist and an elevator that allow bearing replacement work to be easily performed. [Means for solving the problem]

[0009] To solve the above problems and achieve the object, the hoist includes a frame on which a stator is mounted, a main shaft supported by the frame, a bearing attached to the main shaft, and a rotating body rotatably supported on the main shaft via the bearing. The rotating body has a sheave around which the main rope is wound and a rotor facing the stator. The rotating body further includes a housing fitted with the bearing and rotatable around the main shaft, and a drum connected to the housing and to which the sheave and rotor are attached. The housing is formed in a cylindrical shape, and the inner peripheral portion of the housing is slidably engaged with the bearing. The drum has a first cylindrical portion into which the housing is fitted, a second cylindrical portion having a diameter larger than that of the first cylindrical portion, and a connecting portion that connects the first cylindrical portion and the second cylindrical portion. The sheave is attached to the outer peripheral portion of the first cylindrical portion, and the rotor is attached to the inner peripheral portion of the second cylindrical portion. The first cylindrical portion has temporary fixing through holes through which temporary fixing screws for temporarily fixing the drum to the frame pass. 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. [Effects of the Invention]

[0010] According to the hoist and elevator having the above configuration, the bearing replacement work can be easily performed. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an overall configuration diagram of an elevator according to an embodiment. [Figure 2] FIG. 2 is a front view of the hoist according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is a cross-sectional view showing a state in which an encoder connecting member is removed from the hoisting machine according to one embodiment. [Figure 5] FIG. 5 is a cross-sectional view showing a state in which the drum of the hoist shown in FIG. 4 is fixed to a frame. [Figure 6] FIG. 6 is a cross-sectional view showing a state in which the connection between the drum and the housing of the hoisting machine shown in FIG. 5 has been released. [Figure 7] FIG. 7 is a cross-sectional view showing a state in which the housing is removed from the hoisting machine shown in FIG. 6. [Figure 8] FIG. 8 is a cross-sectional view showing a state in which a bearing is removed from the hoisting machine shown in FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments 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 designated by the same reference numerals, and redundant description will be omitted.

[0013] 1. Embodiment [Elevator] First, the configuration of an elevator according to one embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram illustrating the overall configuration of an elevator according to one embodiment.

[0014] As shown in Fig. 1, elevator 1 is installed in a hoistway 110 formed within a building structure. Elevator 1 includes a car 120 for carrying passengers and cargo, a main rope 130, a counterweight 140, and a hoisting machine 100. A machine room 160 is provided at the top of hoistway 110.

[0015] The hoisting machine 100 is arranged 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 near the hoisting machine 100. The main rope 130 is mounted on the deflection sheave 150.

[0016] The car 120 is formed in a hollow, approximately 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.

[0017] The mass of the counterweight 140 is set to be approximately the same as the mass of the car 120 when it is unloaded.

[0018] [Hoisting machine] Next, the configuration of the hoisting machine 100 will be described with reference to FIGS. Fig. 2 is a front view of the hoisting machine 100. Fig. 3 is a cross-sectional view taken along line AA in Fig. 2.

[0019] As shown in Figures 2 and 3, the hoisting machine 100 has a frame 2, a main shaft 3, and a rotating body 4. The rotating body 4 is rotatably supported on the main shaft 3 via bearings 8A and 8B. A stator 6 is attached to the frame 2. An annular rotor 7 is attached to the rotating body 4. The rotor 7 is disposed outside the stator 6. In other words, the hoisting machine 100 is an outer rotor type hoisting machine.

[0020] 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 moves up and down is defined as the Y direction. The direction perpendicular to the X and Y directions is defined as the Z direction. The frame 2 and the rotating body 4 face each other in the X direction. Furthermore, the rotating body 4 side is defined as one side in the X direction. Furthermore, the frame 2 side is defined as the other side in the X direction.

[0021] (frame) 3, the frame 2 has a shaft fixing portion 21 to which the main shaft 3 is fixed, a stator mounting portion 23 to which the stator 6 is attached, and a first connecting portion 22 that connects the shaft fixing portion 21 and the stator mounting portion 23. The frame 2 also has an outer wall portion 25 that covers the outer periphery of the rotor 4, and a second connecting portion 24 that connects the stator mounting portion 23 and the outer wall portion 25.

[0022] The shaft fixing portion 21 is located approximately in the center of the frame 2 on the YZ plane. The shaft fixing portion 21 is formed in a cylindrical shape with its axial direction aligned with the X direction. The stator mounting portion 23 is formed in a cylindrical shape with its axial direction aligned with the X direction. The inner diameter of the stator mounting portion 23 is larger than the outer diameter of the shaft fixing portion 21. The stator mounting portion 23 is located radially outward of the shaft fixing portion 21.

[0023] The first connecting portion 22 is made of an annular plate. The plane of the first connecting portion 22 is approximately perpendicular to the X direction. The inner peripheral side of the first connecting portion 22 is continuous with one end of the shaft fixing portion 21 in the X direction. The outer peripheral side of the first connecting portion 22 is continuous with one end of the stator mounting portion 23 in the X direction. Three temporary fixing screw holes 22a are formed in the first connecting portion 22. Temporary drum fixing screws 45 (see FIG. 5), which will be described later, are screwed into the three temporary fixing screw holes 22a.

[0024] The outer wall portion 25 is formed in a cylindrical shape with its axial direction aligned with the X direction. The outer wall portion 25 is located radially outside the stator mounting portion 23. The inner periphery of the outer wall portion 25 and the outer periphery of the stator mounting portion 23 face each other across a predetermined distance in the radial direction. The stator 6 and the rotor 7 are disposed in the space between the outer wall portion 25 and the stator mounting portion 23.

[0025] The second connection portion 24 is made of an annular plate. The plane of the second connection portion 24 is approximately perpendicular to the X direction. The inside of the second connection portion 24 is continuous with the end of the stator attachment portion 23 on the other side in the X direction. The outside of the second connection portion 24 is continuous with the end of the outer wall portion 25 on the other side in the X direction.

[0026] (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 fitted into a shaft fixing portion 21 of the frame 2. The main shaft 3 is fixed to the shaft fixing portion 21. One side of the main shaft 3 in the X direction protrudes from the shaft fixing portion 21. One side of the main shaft 3 in the X direction supports a rotor 4 rotatably around its axis.

[0027] The main shaft 3 is provided with an encoder chamber 31 inside. The encoder chamber 31 opens at one end face of the main shaft in the X direction. The encoder chamber 31 houses an encoder 10. An encoder connecting member 43 (described later) of the rotating body 4 is connected to the encoder 10.

[0028] A positioning protrusion 32 is provided on the outer periphery of one side in the X direction of the main shaft 3. The positioning protrusion 32 protrudes radially outward from the main shaft 3. The positioning protrusion 32 is continuous in the circumferential direction of the main shaft 3. A bearing 8A abuts against the positioning protrusion 32.

[0029] (bearings) Bearings 8A and 8B are attached to the outer periphery of one side of the spindle 3 in the X direction. The bearings 8A and 8B are formed in an annular shape. The bearings 8A and 8B are fitted onto the spindle 3. The bearing 8A is disposed on the other side in the X direction, and the bearing 8B is disposed on one side in the X direction. The bearings 8A and 8B engage with the rotating body 4. The rotating body 4 is rotatably supported on the spindle 3 via the bearings 8A and 8B.

[0030] Bearing 8A abuts against positioning protrusion 32 of main shaft 3. A spacer 81 is disposed between bearing 8A and bearing 8B. A nut 82 is screwed onto main shaft 3. Nut 82 abuts against the end face of bearing 8B opposite to spacer 81. Bearing 8A is positioned relative to main shaft 3 by being sandwiched between positioning protrusion 32 and spacer 81. Bearing 8B is positioned relative to main shaft 3 by being sandwiched between spacer 81 and nut 82.

[0031] (rotating body) The rotating body 4 has a housing 41 rotatably fitted to the bearings 8A and 8B, a drum 42 connected to the housing 41, and an encoder connecting member 43 detachably attached to the housing 41.

[0032] The housing 41 is formed in a cylindrical shape with its axial direction aligned with the X direction. The inner periphery of the housing 41 slidably engages with the bearings 8A and 8B. An engaging portion 411 is provided on the inner periphery of the housing 41. The engaging portion 411 protrudes radially inward of the housing 41. The engaging portion 411 is continuous in the circumferential direction of the housing 41. The engaging portion 411 engages with an end face of the bearing 8B on one side in the X direction. This positions the housing 41 relative to the frame 2 via the bearing 8B and the main shaft 3.

[0033] Three connecting protrusions 412 are provided on the outer periphery of the housing 41. The three connecting protrusions 412 are arranged at equal intervals in the circumferential direction of the housing 41. The three connecting protrusions 412 protrude radially outward from the housing 41. The three connecting protrusions 412 engage with connecting recesses 421a of the drum 42, which will be described later.

[0034] A connecting through hole 412a is formed in each of the three connecting protrusions 412. The connecting through hole 412a extends in the X direction. A housing connecting screw 44 for detachably connecting the housing 41 to the drum 42 passes through the connecting through hole 412a.

[0035] The drum 42 has a first cylindrical portion 421 to which the housing 41 is connected, a second cylindrical portion 422 to which the rotor 7 is attached, and a connection portion 423 that connects the first cylindrical portion 421 and the second cylindrical portion 422.

[0036] The first cylindrical portion 421 is formed in a cylindrical shape with its axial direction aligned with the X direction. The second cylindrical portion 422 is formed in a cylindrical shape with its axial direction aligned with the X direction. The second cylindrical portion 422 is formed in a cylindrical shape with a larger diameter than the first cylindrical portion 421. The second cylindrical portion 422 is located on the other side of the first cylindrical portion 421 in the X axis direction.

[0037] The outer periphery of the housing 41 is fitted into the inner periphery of the first cylindrical portion 421. The sheave 11 is attached to the outer periphery of the first cylindrical portion 421. The sheave 11 has a sheave body 11A formed in a cylindrical shape with its axial direction aligned in the X direction, and a contact portion 11B provided at one end of the sheave body 11A. A plurality of grooves are formed on the outer periphery of the sheave body 11A, around which the main rope 130 is wound.

[0038] The contact portion 11B protrudes radially inward from the sheave body 11A. The contact portion 11B is made of an annular plate. The contact portion 11B comes into contact with one end surface of the first cylindrical portion 421 in the X direction.

[0039] A connecting recess 421a is provided on one end face in the X direction of the first cylindrical portion 421. The connecting recess 421a is formed by cutting out the inner periphery on one side in the X direction of the first cylindrical portion 421 from the end face side. The three connecting protrusions 412 of the housing 41 engage with the connecting recess 421a.

[0040] Three connecting screw holes 421b are provided in the first cylindrical portion 421. The three connecting screw holes 421b are arranged at equal intervals in the circumferential direction of the first cylindrical portion 421. The connecting screw holes 421b extend in the X direction. One end of the connecting screw holes 421b opens into the bottom surface of the connecting recess 421a.

[0041] A housing connecting screw 44 is threadedly engaged with the connecting recess 421a. The housing connecting screw 44 fastens the housing 41 to the drum 42. In this way, the housing 41 is detachably connected to the first cylindrical portion 421 of the drum 42.

[0042] Three temporary fixing through holes 421c are provided in the first cylindrical portion 421. The three temporary fixing through holes 421c are arranged at equal intervals in the circumferential direction of the first cylindrical portion 421. The three temporary fixing through holes 421c are arranged between adjacent connecting screw holes 421b in the circumferential direction. The three temporary fixing through holes 421c extend in the X direction.

[0043] One end of the temporary fixing through-hole 421c is open to the bottom surface of the connecting recess 421a. A drum temporary fixing screw 45 (see FIG. 5), which will be described later, passes through the temporary fixing through-hole 421c. The drum temporary fixing screw 45 is screwed into the three temporary fixing screw holes 22a of the frame 2. In this way, the drum 42 is detachably fixed (fastened) to the frame 2. When the housing 41 is removed from the drum 42, the drum 42 is temporarily fixed to the frame 2.

[0044] The second cylindrical portion 422 is disposed in the space between the outer wall portion 25 of the frame 2 and the stator mounting portion 23. The rotor 7 is attached to the inner peripheral portion of the second cylindrical portion 422. The connecting portion 423 is made of an annular plate. The plane of the connecting portion 423 is approximately perpendicular to the X direction. The inner peripheral side of the connecting portion 423 is continuous with the end portion of the first cylindrical portion 421 on the other side in the X direction. The outer peripheral side of the connecting portion 423 is continuous with the end portion of the second cylindrical portion 422 on one side in the X direction.

[0045] The encoder connecting member 43 has a lid portion 431 and a shaft portion 432. The lid portion 431 is formed in a disk shape. The lid portion 431 covers an opening at one end of the housing 41 in the X direction. The outer diameter of the lid portion 431 is larger than the inner diameter of the housing 41.

[0046] The lid portion 431 has cutouts formed on its outer periphery to avoid interference with the three connecting protrusions 412 of the housing 41 and the drum 42 (see FIG. 2). The cutouts of the lid portion 431 fit into the inner periphery of the housing 41. The lid portion 431 is detachably connected to the housing 41 using screws (not shown). This allows the encoder connecting member 43 to rotate together with the housing 41 and the drum 42.

[0047] 3, the shaft portion 432 of the encoder connecting member 43 is provided on the other side of the cover portion 431 in the X direction. The shaft portion 432 protrudes substantially perpendicularly from the center of the cover portion 431. The shaft portion 432 is inserted into the encoder chamber 31 of the main shaft 3. The shaft portion 432 is connected to the encoder 10 in the encoder chamber 31.

[0048] (stator) The stator 6 is attached to the outer periphery of a stator attachment portion 23 of the frame 2. The stator 6 is composed of an iron core and a coil wound around the iron core.

[0049] (rotor) The rotor 7 is attached to the inner periphery of the second cylindrical portion 422 of the rotor 4. The rotor 7 is formed in a cylindrical shape with its axial direction aligned with the X direction. The rotor 7 is made of a magnetic material. The rotor 7 faces the stator 6 across an air gap in the radial direction of the stator attachment portion 23 and the second cylindrical portion 422.

[0050] (Brake mechanism) As shown in FIG. 2, a brake mechanism 9 is provided on the upper part of the frame 2. The brake mechanism 9 has brake pads (not shown). The brake pads face the outer periphery of the second cylindrical portion 422 of the drum 42. When braking the hoisting machine 100, the brake mechanism 9 moves the brake pads toward the second cylindrical portion 422 of the drum 42. This causes the brake pads to press against the outer periphery of the second cylindrical portion 422. As a result, the rotation of the rotating body 4, which includes the drum 42 and the sheave 11, is braked.

[0051] [Bearing replacement work] Next, the replacement work of the bearings 8A and 8B in the hoisting machine 100 will be described with reference to FIGS. Fig. 4 is a cross-sectional view showing a state in which the encoder connecting member 43 has been removed from the hoisting machine 100. Fig. 5 is a cross-sectional view showing a state in which the drum 42 has been temporarily fixed to the frame 2 from the state shown in Fig. 4. Fig. 6 is a cross-sectional view showing a state in which the connection between the drum 42 and the housing 41 has been released from the state shown in Fig. 5. Fig. 7 is a cross-sectional view showing a state in which the housing 41 has been removed from the state shown in Fig. 6. Fig. 8 is a cross-sectional view showing a state in which the bearings 8A and 8B have been removed from the state shown in Fig. 7.

[0052] When replacing the bearings 8A and 8B of the hoisting machine 100, first, the encoder connecting member 43 is removed from the hoisting machine 100 (see FIG. 4), thereby exposing one side of the housing 41 in the X direction.

[0053] Next, the first cylindrical portion 421 of the drum 42 is detachably fixed to the first connecting portion 22 of the frame 2 using the drum temporary fixing screw 45 (FIG. 5). In other words, the drum 42 is temporarily fixed to the frame 2. This prevents the relative positions of the drum 42 and the spindle 3 from shifting.

[0054] Next, the housing connecting screws 44 are removed from the three connecting screw holes 421b in the drum 42 (see FIG. 6). This releases the connection between the drum 42 and the housing 41 in the rotating body 4. As a result, it becomes possible to remove the housing 41 from the drum 42.

[0055] Next, the housing 41 is removed from the drum 42 (see FIG. 7), thereby exposing one side of the main shaft 3 in the X direction and the bearings 8A and 8B.

[0056] Next, the nut 82 is removed from the main shaft 3. After that, the bearings 8A, 8B and the spacer 81 are moved to one side in the X direction and removed from the main shaft 3 (see FIG. 8). This allows the bearings 8A, 8B to be removed from the main shaft 3 without removing the drum 42 and the rotor 7.

[0057] Next, new replacement bearings 8A and 8B are attached to the spindle 3. To attach the bearings 8A and 8B to the spindle 3, first, the bearing 8A, spacer 81, and bearing 8B are passed through the spindle 3 in this order. At this time, the bearing 8A abuts against the positioning protrusion 32 of the spindle 3 (see FIG. 7). Next, a nut 82 is screwed onto the spindle 3 to fix the bearings 8A and 8B and the spacer 81. This positions the bearings 8A and 8B relative to the spindle.

[0058] Next, the housing 41 is fitted onto the drum 42 (see FIG. 6). At this time, the inner periphery of the housing 41 engages with the bearings 8A and 8B. As a result, the housing 41 is rotatably supported on the main shaft 3 via the bearings 8A and 8B. In addition, the engaging portion 411 of the housing 41 engages with the bearing 8B. As a result, the housing 41 is positioned relative to the main shaft 3 and the frame 2.

[0059] Next, the housing 41 and the drum 42 are connected together using the housing connecting screws 44 (see FIG. 5). As a result, the housing 41 and the drum 42 are assembled together.

[0060] Next, the drum temporary fixing screws 45 are removed from the three temporary fixing screw holes 22a in the frame 2 (see FIG. 4). This makes the drum 42 and rotor 7 rotatable relative to the frame 2 and stator 6. Thereafter, the encoder connecting member 43 is connected to the housing 41 using screws (not shown). At this time, the shaft portion 432 of the encoder connecting member 43 is connected to the encoder 10.

[0061] The hoist 100 is assembled by connecting the encoder connecting member 43 to the housing 41. As a result, the replacement work of the bearings 8A and 8B is completed. Note that the encoder connecting member 43 may be connected to the housing 41 before removing the drum temporary fixing screws 45.

[0062] 2. Summary As explained above, the hoist 100 of the above-mentioned embodiment includes the frame 2 on which the stator 6 is provided, the main shaft 3 supported by the frame 2, the bearings 8A and 8B attached to the main shaft 3, and the rotating body 4 rotatably supported on the main shaft 3 via the bearings 8A and 8B. The rotating body 4 has a sheave 11 around which the main rope 130 is wound, and a rotor 7 facing the stator 6. The rotating body 4 also has a housing 41 fitted into the bearings 8A and 8B and rotatable around the main shaft 3, and a drum 42 connected to the housing 41 and on which the sheave 11 and rotor 7 are attached. This allows the housing 41 and bearings 8A, 8B to be removed from the main shaft 3 without removing the drum 42 and rotor 7. As a result, the bearings 8A, 8B can be replaced without removing the main rope 130 from the sheave 11. Therefore, the replacement work of the bearings 8A, 8B can be easily performed.

[0063] The drum 42 of the hoist 100 in the embodiment described above has a temporary fixing through-hole 421c. A drum temporary fixing screw 45 for temporarily fixing the drum 42 to the frame 2 passes through the temporary fixing through-hole 421c. This allows the drum 42 to be easily temporarily fixed to the frame 2. As a result, it is possible to prevent the relative positions of the drum 42 and the main shaft 3 from shifting when removing the housing 41 from the drum 42 and when connecting the housing 41 to the drum 42. This prevents the work of replacing the bearings 8A and 8B from becoming complicated.

[0064] The housing 41 of the hoist 100 in the embodiment described above has a connecting through-hole 412a through which the housing connecting screw 45 passes. The housing connecting screw 45 connects the housing 41 to the drum 42 in a detachable manner. This allows the housing 41 to be easily removed from the drum 42. Also, the housing 41 can be easily connected to the drum 42. As a result, the bearings 8A and 8B can be easily replaced.

[0065] The housing 41 of the hoisting machine 100 in the above-described embodiment has an engaging portion 411 that engages with the bearings 8A, 8B. The housing 41 is positioned relative to the frame 2 via the bearings 8A, 8B and the main shaft 3. This makes it possible to easily position the housing 41 relative to the frame 2. Furthermore, by connecting the housing 41 and the drum 42, it is possible to easily position the rotor 7 attached to the drum 42 and the stator 6 attached to the frame 2 relative to each other.

[0066] The main shaft 3 of the hoisting machine 100 in the above-described embodiment has positioning protrusions 32 for positioning the bearings 8A and 8B. This allows the bearings 8A and 8B to be easily positioned relative to the main shaft 3.

[0067] The housing 41 of the hoisting machine 100 in the above-described embodiment is formed in a cylindrical shape. The inner periphery of the housing 41 is slidably engaged with the bearings 8A and 8B. This allows housing 41 to be engaged with or disengaged from bearings 8A, 8B by moving housing 41 in the axial direction of spindle 3. As a result, bearings 8A, 8B can be easily replaced.

[0068] The drum 42 of the hoisting machine 100 in the above-described embodiment has a first cylindrical portion 421 into which the housing 41 is fitted, a second cylindrical portion 422 having a diameter larger than that of the first cylindrical portion 421, and a connecting portion 423 that connects the first cylindrical portion 421 and the second cylindrical portion 422. The sheave 11 is attached to the outer periphery of the first cylindrical portion 421. The rotor 7 is attached to the inner periphery of the second cylindrical portion 422. As a result, by moving the housing 41 in the axial direction of the main shaft 3, the housing 41 can be fitted into or removed from the first cylindrical portion 421 of the drum 42. As a result, the housing 41 can be easily connected to the drum 42 and removed from the drum 42. This simplifies the work of replacing the bearings 8A and 8B.

[0069] The first cylindrical portion 421 of the hoisting machine 100 in the above-described embodiment has a temporary fixing through-hole 421c. A drum temporary fixing screw 45 for temporarily fixing the drum 42 to the frame 2 passes through the temporary fixing through-hole 421c. This allows the drum 42 to be easily temporarily fixed to the frame 2. As a result, it is possible to prevent the relative positions of the drum 42 and the main shaft 3 from shifting when removing the housing 41 from the drum 42 and when connecting the housing 41 to the drum 42. This prevents the work of replacing the bearings 8A and 8B from becoming complicated.

[0070] 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. This allows the housing 41 and bearings 8A, 8B to be removed from the main shaft 3 without removing the drum 42 and rotor 7 in the hoisting machine 100. As a result, the bearings 8A, 8B can be replaced without removing the main rope 130 from the sheave 11. Therefore, the replacement work of the bearings 8A, 8B in the hoisting machine 100 can be easily performed.

[0071] The hoist and elevator of the present invention have been described above, including their functions and effects. However, the hoist and elevator of the present invention are not limited to the above-described embodiments, and various modifications are possible within the scope of the invention as set forth in the claims.

[0072] For example, in the above-described embodiment, the housing 41 and the drum 42 are fastened to each other at three points. However, the number of fastening points between the housing and the drum according to the present invention may be two or less, or four or more. Note that to securely fasten the housing and the drum, it is preferable to use two or more fastening points.

[0073] In the above-described embodiment, the drum 42 and the frame 2 are temporarily fixed at three points. However, the number of points at which the drum and the frame are temporarily fixed according to the present invention may be two or less, or four or more. Note that, to strengthen the temporary fixation between the drum and the frame, it is preferable to have two or more temporary fixation points.

[0074] In the above-described embodiment, the housing 41 is detachably connected to the drum using the housing connecting screws 44. However, the connection between the housing and the drum according to the present invention is not limited to fastening using screws. The hoist according to the present invention may be provided with, for example, a connecting member that connects the housing and the drum. Such a connecting member is connected, for example, to one end face of the housing in the X direction and one end face of the drum (first cylindrical portion) in the X direction. In this case, it is preferable that the sheave 11 has a shape that does not have the abutment portion 11B.

[0075] In the above-described embodiment, an outer rotor type hoist 100 has been described as an example. However, the hoist according to the present invention may be an inner rotor type hoist in which the rotor is disposed radially inside the stator.

[0076] In the above-described embodiment, the elevator 1 has been described as having the machine room 160 above the elevator shaft 110. However, the elevator according to the present invention may be a so-called machine room-less elevator that does not have a machine room.

[0077] The above-described embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the configurations described. Furthermore, some of the configurations of the embodiment may be added to, deleted from, or replaced with other configurations.

[0078] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "substantially parallel" or "substantially orthogonal" state within a range in which the functions can be exerted. [Explanation of symbols]

[0079] DESCRIPTION OF SYMBOLS 1...Elevator, 2...Frame, 3...Main shaft, 4...Rotating body, 6...Stator, 7...Rotor, 8A, 8B...Bearing, 9...Brake mechanism, 10...Encoder, 11...Sheave, 21...Shaft fixing portion, 22...First connection portion, 22a...Temporary fixing screw hole, 23...Stator mounting portion, 24...Second connection portion, 25...Outer wall portion, 31...Encoder chamber, 32...Positioning protrusion, 41...Housing, 42...Drum, 43...Encoder connecting member, 81...Spacer, 82...Nut, 91...Brake pad, 100...Hoisting machine, 110...Hoistway, 130...Main rope, 140...Counterweight, 150...Bearing wheel, 160...Machine room, 411...Engagement portion, 412...Coupling protrusion, 412a...connection through hole, 421...first cylindrical portion, 421a...connection recess, 421b...connection screw hole, 421c...temporary fixing through hole, 422...second cylindrical portion, 423...connection portion, 431...lid portion, 432...shaft portion

Claims

1. a frame on which a stator is provided; a main shaft supported by the frame; a bearing attached to the main shaft; A hoist including a rotor having a sheave rotatably supported on the main shaft via the bearing and around which a main rope is wound, and a rotor facing the stator, The rotating body is a housing fitted to the bearing and rotatable around the main shaft; a drum connected to the housing and having the sheave and the rotor attached thereto; The housing is formed in a cylindrical shape, an inner periphery of the housing slidably engages with the bearing; the drum has a first cylindrical portion into which the housing is fitted, a second cylindrical portion having a diameter larger than that of the first cylindrical portion, and a connecting portion connecting the first cylindrical portion and the second cylindrical portion, the sheave is attached to the outer periphery of the first cylindrical portion, the rotor is attached to an inner circumferential portion of the second cylindrical portion, the first cylindrical portion has a temporary fixing through hole, A drum temporary fixing screw for temporarily fixing the drum to the frame passes through the temporary fixing through hole. Hoisting machine.

2. The drum has a temporary fixing through hole, A drum temporary fixing screw for temporarily fixing the drum to the frame passes through the temporary fixing through hole. The hoist according to claim 1.

3. The housing has a connecting through-hole through which a housing connecting screw passes for detachably connecting the housing to the drum. The hoist according to claim 1.

4. The housing has an engaging portion that engages with the bearing, and is positioned relative to the frame via the bearing and the main shaft. The hoist according to claim 1.

5. The main shaft has a projection for positioning the bearing. The hoist according to claim 4.

6. 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 is a frame on which a stator is provided; a main shaft supported by the frame; a rotor that is rotatably supported on the main shaft and has a sheave around which the main rope is wound, and a rotor that faces the stator, The rotating body is a bearing attached to an outer periphery of the main shaft; a housing fitted to the bearing and rotatable around the main shaft; a drum connected to the housing and having the sheave and the rotor attached thereto; The housing is formed in a cylindrical shape, an inner periphery of the housing slidably engages with the bearing; the drum has a first cylindrical portion into which the housing is fitted, a second cylindrical portion having a diameter larger than that of the first cylindrical portion, and a connecting portion connecting the first cylindrical portion and the second cylindrical portion, the sheave is attached to the outer periphery of the first cylindrical portion, the rotor is attached to an inner circumferential portion of the second cylindrical portion, the first cylindrical portion has a temporary fixing through hole, A drum temporary fixing screw for temporarily fixing the drum to the frame passes through the temporary fixing through hole. Elevator.

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