Rotating body and elevator hoisting machine

Abstract

Provided is a rotating body, wherein an outer rotating member is fixed to an inner rotating member and rotates together with the inner rotating member. The outer rotating member has an annular fitting portion, a disc-shaped second fastening portion, and a plurality of connecting portions. The plurality of connecting portions are provided between the fitting portion and the second fastening portion with space between the connecting portions in the circumferential direction of the fitting portion, and connect the fitting portion and the second fastening portion. Apart from the plurality of connecting portions, there are a plurality of voids provided between the fitting portion and the second fastening portion.

Description

Rotating bodies and elevator hoists

[0001] The present disclosure relates to a rotating body and an elevator hoist.

[0002] In a conventional elevator hoisting machine, the sheave is fixed to the rotating frame by shrink fitting (see, for example, Patent Document 1).

[0003] JP 2009-155070 A

[0004] In conventional elevator traction machines such as those described above, when shrink-fitting a sheave to a rotating frame, the entire sheave must be heated to expand the diameter of the sheave hole, necessitating a heating device large enough to accommodate the entire sheave. However, for example, in a large elevator traction machine, if a sheave needs to be replaced, it is difficult to transport and install a large heating device in the machine room where the elevator traction machine is installed. This can make it difficult to replace the sheave on-site.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a rotating body and an elevator hoist that allow the outer rotating member to be easily fitted into the fitted portion of the inner rotating member.

[0006] The rotating body disclosed herein comprises a rotatable inner rotating member having a fitted portion and a flange-shaped first fastening portion protruding radially outward from the outer periphery of the fitted portion, and an outer rotating member fixed to the inner rotating member and rotating together with the inner rotating member, wherein the outer rotating member has a circular fitting portion fitted to the fitted portion, a disk-shaped second fastening portion provided radially outward of the fitting portion, overlapped with the first fastening portion in the axial direction of the fitting portion, and fixed to the first fastening portion by a plurality of fasteners, and a plurality of connecting portions provided between the fitting portion and the second fastening portion at intervals circumferentially of the fitting portion and connecting the fitting portion and the second fastening portion, and a plurality of gaps are provided between the fitting portion and the second fastening portion excluding the plurality of connecting portions.

[0007] According to the present disclosure, the outer rotating member can be easily fitted into the fitted portion of the inner rotating member.

[0008] 16 is a front view of a rotating body according to embodiment 1. A cross-sectional view taken along line II-II of FIG. 1. A cross-sectional view taken along line III-III of FIG. 1. A front view of a rotating body according to a first modified example of embodiment 1. A cross-sectional view taken along line V-V of FIG. 4. A cross-sectional view of a rotating body according to a second modified example of embodiment 1. A cross-sectional view of a rotating body according to a third modified example of embodiment 1. A front view of a rotating body according to embodiment 2. A cross-sectional view taken along line IX-IX of FIG. 8. A cross-sectional view taken along line X-X of FIG. 8. A front view of a rotating body according to a first modified example of embodiment 2. A cross-sectional view taken along line XII-XII of FIG. 11. A cross-sectional view of a rotating body according to a second modified example of embodiment 2. A cross-sectional view of a rotating body according to a third modified example of embodiment 2. A cross-sectional view taken along line XVI-XVI of FIG. 15. A cross-sectional view taken along line XVII-XVII of FIG. 15. A cross-sectional view showing an enlarged view of portion XVIII of FIG. 16. A front view of a rotating body according to a first modified example of embodiment 3. 28. A cross-sectional view taken along line XX-XX of FIG. 19. A front view showing a rotating body according to a second modified example of embodiment 3. A front view showing a rotating body according to a third modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fourth modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fifth modified example of embodiment 3. A front view showing a rotating body according to a fourth modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fourth modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fourth modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fifth modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fourth modified example of embodiment 3. A cross-sectional view showing a rotating body according to a fifth modified example of embodiment 4. A cross-sectional view showing a rotating body according to a fifth modified example of embodiment 4. A cross-sectional view showing an example of an elevator to which a rotating body according to the present disclosure is applied.

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. Fig. 1 is a front view showing a rotating body according to embodiment 1. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1.

[0010] In the drawing, a pair of bearings 12 are mounted on the outer periphery of a shaft member 11. The cross section of the shaft member 11 perpendicular to the axis C of the shaft member 11 has a circular shape.

[0011] A hub 13, which is a rotatable inner rotating member, is attached to the outer periphery of the pair of bearings 12. That is, the hub 13 is attached to the shaft member 11 via the pair of bearings 12. The hub 13 rotates relative to the shaft member 11 around the axis C.

[0012] The hub 13 has a cylindrical fitted portion 13a and a flange-shaped first fastening portion 13b. The fitted portion 13a is positioned coaxially with the shaft member 11. The pair of bearings 12 are interposed between the outer peripheral surface of the shaft member 11 and the inner peripheral surface of the fitted portion 13a.

[0013] The first fastening portion 13b protrudes from the outer periphery of the fitted portion 13a radially outward from the fitted portion 13a. The radial direction of the fitted portion 13a is perpendicular to the axis C. The hub 13 in the first embodiment is configured as a single component.

[0014] An outer rotating member 14 is fixed to the hub 13. The outer rotating member 14 rotates together with the hub 13 about an axis C. The rotating body 10 in the first embodiment has the hub 13, the outer rotating member 14, and a plurality of fasteners 15.

[0015] The outer rotating member 14 has an annular fitting portion 14a, a disk-shaped second fastening portion 14b, a plurality of connecting portions 14c, and a cylindrical outer circumferential portion 14d. The fitting portion 14a is fitted and fixed to the outer periphery of the fitted portion 13a by shrink fitting.

[0016] The second fastening portion 14b is provided radially outward of the fitting portion 14a. The radial direction of the fitting portion 14a is perpendicular to the axis C. The second fastening portion 14b protrudes radially inward from the inner circumferential surface of the outer circumferential portion 14d of the fitting portion 14a.

[0017] The second fastening portion 14b is overlapped with the first fastening portion 13b in the axial direction of the fitting portion 14a, which is parallel to the axis C and corresponds to the left-right direction in FIG.

[0018] The second fastening portion 14b is fixed to the first fastening portion 13b by a plurality of fasteners 15. The plurality of fasteners 15 are arranged at equal intervals in the circumferential direction of the fitting portion 14a. The circumferential direction of the fitting portion 14a is a direction along the circumference of a circle centered on the axis C. The plurality of fasteners 15 are also arranged on the same circumference of a circle centered on the axis C.

[0019] For example, a bolt is used as each fastener 15. Each bolt passes through the second fastening portion 14b parallel to the axis C and is screwed into a threaded hole in the first fastening portion 13b.

[0020] The plurality of connecting portions 14c are provided between the fitting portion 14a and the second fastening portion 14b at equal intervals in the circumferential direction of the fitting portion 14a. The plurality of connecting portions 14c also connect the fitting portion 14a and the second fastening portion 14b.

[0021] In this example, two connecting portions 14c are provided between the fitting portion 14a and the second fastening portion 14b. Also, in this example, four fasteners 15 are used. Two of the four fasteners 15 are arranged at the same positions as the connecting portions 14c in the circumferential direction of the fitting portion 14a.

[0022] A plurality of gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, except for the plurality of connecting portions 14c. In this example, a pair of gaps 14e is provided between the fitting portion 14a and the second fastening portion 14b.

[0023] The front shape of each gap 14e as viewed along the axis C is an arc shape centered on the axis C. A connecting portion 14c is interposed between two adjacent gaps 14e in the circumferential direction of the fitting portion 14a. The multiple fasteners 15 are located radially outward of the multiple connecting portions 14c and multiple gaps 14e of the fitting portion 14a.

[0024] A recess is provided on at least one of the inner peripheral surface of the fitting portion 14a and the outer peripheral surface of the fitted portion 13a. In this example, a pair of notches 14f are provided as recesses on the inner peripheral surface of the fitting portion 14a. By providing the pair of notches 14f on the inner peripheral surface of the fitting portion 14a, the contact area between the fitting portion 14a and the fitted portion 13a is reduced.

[0025] The pair of notches 14f are located at the same positions as the pair of connecting portions 14c in the circumferential direction of the fitting portion 14a. Each notch 14f is provided continuously over the entire axial direction of the fitting portion 14a. When viewed along the axial direction of the fitting portion 14a, each notch 14f has a semicircular shape.

[0026] In this rotating body 10, multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, excluding the multiple connecting portions 14c. Therefore, even when only the fitting portion 14a is heated, heat conduction to the second fastening portion 14b is suppressed, and the fitting portion 14a can be heated efficiently. This allows the hole in the fitting portion 14a to be expanded using a small amount of heat using a small heating device.

[0027] Therefore, according to the configuration of the first embodiment, the outer rotation member 14 can be easily fitted into the fitted portion 13a.

[0028] Furthermore, since multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, it is possible to efficiently heat only the fitting portion 14a, and therefore it is also possible to easily remove the outer rotating member 14 from the fitted portion 13a. Therefore, it is possible to carry a new rotating body 10 disassembled into the hub 13 and the outer rotating member 14 to the installation site of the existing rotating body 10, and easily replace the existing rotating body 10 with the new rotating body 10.

[0029] The hub 13 is attached to the shaft member 11 via the bearing 12. Therefore, in the rotating body 10 that rotates relative to the shaft member 11, the outer rotating member 14 can be easily fitted into the fitted portion 13a.

[0030] Here, when assembling the rotating body 10, the fitting portion 14a is fitted into the fitted portion 13a, and then the second fastening portion 14b is fixed to the first fastening portion 13b with the multiple fasteners 15. After the fitting portion 14a is fitted into the fitted portion 13a, the temperature of the outer rotating member 14 decreases, causing the outer rotating member 14 to contract in all directions.

[0031] In this case, in the first embodiment, the inner peripheral surface of the fitting portion 14a is provided with multiple recesses, i.e., multiple notches 14f, thereby reducing the force with which the fitting portion 14a tightens the fitted portion 13a. As a result, slippage occurs between the fitting portion 14a and the fitted portion 13a when the outer rotating member 14 contracts. This prevents a decrease in the fastening force between the first fastening portion 13b and the second fastening portion 14b by the multiple fasteners 15. In other words, if each fastener 15 is a bolt, a decrease in the axial tension of the bolt can be prevented.

[0032] Furthermore, by providing the plurality of notches 14f at positions corresponding to the plurality of connecting portions 14c, it is possible to prevent the plurality of connecting portions 14c from interfering with the expansion of the hole of the fitting portion 14a when the fitting portion 14a is heated, which makes it even easier to fit the outer rotating member 14 into the fitted portion 13a.

[0033] Fig. 4 is a front view showing a rotating body 10 according to a first modified example of embodiment 1. Fig. 5 is a cross-sectional view taken along line VV in Fig. 4.

[0034] In the first modification of the first embodiment, a pair of notches 13c are provided as recesses on the outer peripheral surface of the fitted portion 13a instead of the pair of notches 14f. By providing the pair of notches 13c on the outer peripheral surface of the fitted portion 13a, the contact area between the fitting portion 14a and the fitted portion 13a is reduced.

[0035] The pair of notches 13c are located at the same positions as the pair of connecting portions 14c in the circumferential direction of the fitting portion 14a. Each notch 13c is provided continuously over the entire fitted portion 13a in the axial direction of the fitting portion 14a. The shape of each notch 13c when viewed along the axial direction of the fitting portion 14a is semicircular.

[0036] Other configurations of the first modification of the first embodiment are the same as those of the first embodiment. Even with this configuration, the same effects as those of the first embodiment can be obtained.

[0037] It is also possible to provide a plurality of notches 14f on the inner peripheral surface of the fitting portion 14a and a plurality of notches 13c on the outer peripheral surface of the fitted portion 13a.

[0038] 6 is a cross-sectional view showing a rotating body 10 according to a second modified example of Embodiment 1. Note that Fig. 6 shows a cross section corresponding to the cross section taken along line II-II in Fig. 1.

[0039] In the second modification of the first embodiment, the hub 13 is configured by combining two members. That is, the first fastening portion 13b is configured as a separate member from the mated portion 13a. The first fastening portion 13b is fixed to the outer periphery of the mated portion 13a by shrink fitting.

[0040] Other configurations of the second modification of the first embodiment are the same as those of the first embodiment. Even with this configuration, the same effects as those of the first embodiment can be obtained.

[0041] Furthermore, in the first embodiment, the fasteners 15 are positioned away from the fitted portion 13a, which increases the diameter of the first fastening portion 13b and increases the weight of the hub 13. In contrast, by dividing the hub 13 into the fitted portion 13a and the first fastening portion 13b, the hub 13 can be more easily transported.

[0042] 7 is a cross-sectional view showing a rotating body 10 according to a third modified example of Embodiment 1. Note that Fig. 7 shows a cross section corresponding to the cross section taken along line VV in Fig. 4.

[0043] In the third modification of the first embodiment, the first fastening portion 13b is configured as a separate member from the fitted portion 13a, and is fixed to the outer periphery of the fitted portion 13a by shrink fitting.

[0044] Other configurations of the third modified example of the first embodiment are similar to those of the first modified example of the first embodiment. Even with this configuration, it is possible to obtain the same effects as those of the second modified example of the first embodiment.

[0045] Embodiment 2 Next, Fig. 8 is a front view showing a rotating body according to embodiment 2. Fig. 9 is a cross-sectional view taken along line IX-IX in Fig. 8. Fig. 10 is a cross-sectional view taken along line XX in Fig. 8.

[0046] The rotating body 20 in the second embodiment has a rotating shaft body 21 as an inner rotating member, an outer rotating member 14 , and a plurality of fasteners 15 .

[0047] The rotating shaft body 21 has a shaft member 22 as a fitted portion and a flange member 23 as a first fastening portion. The flange member 23 is configured as a separate member from the shaft member 22. The flange member 23 is fixed to the outer periphery of the shaft member 22 by shrink fitting. This allows the flange member 23 to rotate together with the shaft member 22.

[0048] The fitting portion 14a is fitted and fixed to the outer periphery of the shaft member 22 by shrink fitting. The second fastening portion 14b is fixed to the flange member 23 by a plurality of fasteners 15. This allows the outer rotating member 14 to rotate together with the rotating shaft body 21 around the axis C of the rotating shaft body 21.

[0049] In the first embodiment, the outer rotating member 14 can function mainly as a driven wheel, but in the second embodiment, the outer rotating member 14 can function mainly as a driving wheel. Other configurations in the second embodiment are the same as those in the first embodiment.

[0050] In this rotating body 20, multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, excluding the multiple connecting portions 14c. Therefore, even when only the fitting portion 14a is heated, heat conduction to the second fastening portion 14b is suppressed, and the fitting portion 14a can be heated efficiently. This allows the hole in the fitting portion 14a to be expanded with a small amount of heat using a small heating device.

[0051] Therefore, according to the configuration of the second embodiment, the outer rotating member 14 can be easily fitted onto the shaft member 22 .

[0052] Furthermore, since multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, it is possible to efficiently heat only the fitting portion 14a, and therefore it is also possible to easily remove the outer rotating member 14 from the rotating shaft 21. Therefore, it is possible to carry a new rotating body 20 disassembled into the rotating shaft 21 and the outer rotating member 14 to the installation site of the existing rotating body 20, and easily replace the existing rotating body 20 with the new rotating body 20.

[0053] Furthermore, the outer rotating member 14 is rotatable together with the rotating shaft body 21. Therefore, in a rotating body 20 in which the rotating shaft body 21 rotates, the outer rotating member 14 can be easily fitted to the shaft member 22.

[0054] Furthermore, since the rotating shaft body 21 is divided into the shaft member 22 and the flange member 23, the rotating shaft body 21 can be easily transported.

[0055] Furthermore, in the second embodiment, the inner peripheral surface of the fitting portion 14a is provided with a plurality of recesses, i.e., notches 14f, which reduces the force with which the fitting portion 14a tightens the shaft member 22. Therefore, if the outer rotating member 14 contracts after the fitting portion 14a is fitted into the fitted portion 13a, slippage occurs between the fitting portion 14a and the shaft member 22. This prevents a decrease in the fastening force between the first fastening portion 13b and the second fastening portion 14b by the multiple fasteners 15. In other words, if each fastener 15 is a bolt, a decrease in the axial tension of the bolt can be prevented.

[0056] Furthermore, by providing the plurality of notches 14f at positions corresponding to the plurality of connecting portions 14c, it is possible to prevent the plurality of connecting portions 14c from interfering with the expansion of the hole of the fitting portion 14a when the fitting portion 14a is heated. Therefore, it is even easier to fit the outer rotating member 14 onto the shaft member 22.

[0057] Fig. 11 is a front view showing a rotating body 20 according to a first modified example of embodiment 2. Fig. 12 is a cross-sectional view taken along line XII-XII in Fig. 11.

[0058] In a first modification of the second embodiment, instead of the pair of notches 14f, a pair of notches 22a as recesses is provided in the outer peripheral surface of the shaft member 22. By providing the pair of notches 22a in the outer peripheral surface of the shaft member 22, the contact area between the fitting portion 14a and the shaft member 22 is reduced.

[0059] The pair of notches 22a are located at the same positions as the pair of connecting portions 14c in the circumferential direction of the rotating shaft body 21. The circumferential direction of the rotating shaft body 21 is a direction along the circumference of a circle centered on the axis C. The shape of each notch 22a when viewed along the axial direction of the rotating shaft body 21 is semicircular. The axial direction of the rotating shaft body 21 is a direction parallel to the axis C, which is the left-right direction in Figure 12.

[0060] Other configurations of the first modification of the second embodiment are the same as those of the second embodiment. Even with this configuration, the same effects as those of the second embodiment can be obtained.

[0061] It is also possible that a plurality of notches 14f are provided on the inner peripheral surface of the fitting portion 14a, and a plurality of notches 22a are provided on the outer peripheral surface of the shaft member 22.

[0062] 13 is a cross-sectional view showing a rotating body 20 according to a second modification of Embodiment 2. Note that Fig. 13 shows a cross section corresponding to the cross section taken along line IX-IX in Fig. 8.

[0063] In the second modification of the second embodiment, the rotary shaft body 21 has a cylindrical fitted portion 21a and a flange-shaped first fastening portion 21b.

[0064] The first fastening portion 21b protrudes from the outer periphery of the fitted portion 21a radially outward from the fitted portion 21a. The radial direction of the fitted portion 21a is perpendicular to the axis C. The rotating shaft body 21 in the second modified example of the second embodiment is configured as a single component.

[0065] The fitting portion 14a is fitted and fixed to the outer periphery of the fitted portion 21a by shrink fitting. The second fastening portion 14b is overlapped with the first fastening portion 21b in the axial direction of the fitting portion 14a. The second fastening portion 14b is fixed to the first fastening portion 21b by a plurality of fasteners 15.

[0066] Other configurations of the second modification of embodiment 2 are the same as those of embodiment 2. Even with this configuration, it is possible to obtain the same effects as those of embodiment 2. Furthermore, since the rotating shaft body 21 is configured as a single component, it is possible to reduce the number of components.

[0067] 14 is a cross-sectional view showing a rotating body 20 according to a third modified example of embodiment 2. Note that Fig. 14 shows a cross section corresponding to the cross section taken along line XII-XII in Fig. 11.

[0068] In the third modified example of embodiment 2, instead of the pair of notches 14f, a pair of notches 21c are provided as recesses on the outer peripheral surface of fitted portion 21a, similar to the pair of notches 22a in the first modified example of embodiment 2. By providing the pair of notches 21c on the outer peripheral surface of fitted portion 21a, the contact area between fitting portion 14a and fitted portion 21a is reduced.

[0069] Other configurations of the third modified example of the second embodiment are similar to those of the second modified example of the second embodiment. Even with this configuration, it is possible to obtain the same effects as those of the second modified example of the second embodiment.

[0070] Embodiment 3 Next, Fig. 15 is a front view showing a rotating body according to embodiment 3. Fig. 16 is a cross-sectional view taken along line XVI-XVI in Fig. 15. Fig. 17 is a cross-sectional view taken along line XVII-XVII in Fig. 15. Fig. 18 is an enlarged cross-sectional view showing part XVIII in Fig. 16.

[0071] In the third embodiment, instead of the pair of notches 14f in the first embodiment, an annular groove 14g is provided as a recess on the inner peripheral surface of the fitting portion 14a. The groove 14g is provided continuously around the entire circumference of the fitting portion 14a along the circumferential direction of the fitting portion 14a. By providing the groove 14g on the inner peripheral surface of the fitting portion 14a, the contact area between the fitting portion 14a and the fitted portion 13a is reduced.

[0072] Other configurations in the third embodiment are the same as those in the first embodiment.

[0073] In this rotating body 30, multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, excluding the multiple connecting portions 14c. Therefore, even when only the fitting portion 14a is heated, heat conduction to the second fastening portion 14b is suppressed, and the fitting portion 14a can be heated efficiently. This allows the hole in the fitting portion 14a to be expanded with a small amount of heat using a small heating device.

[0074] Therefore, according to the configuration of the third embodiment, the outer rotation member 14 can be easily fitted into the fitted portion 13a.

[0075] Furthermore, since multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, it is possible to efficiently heat only the fitting portion 14a, and therefore it is also possible to easily remove the outer rotating member 14 from the fitted portion 13a. Therefore, it is possible to carry a new rotating body 30 disassembled into the hub 13 and the outer rotating member 14 to the installation site of the existing rotating body 30, and easily replace the existing rotating body 30 with the new rotating body 30.

[0076] The hub 13 is attached to the shaft member 11 via the bearing 12. Therefore, in the rotating body 30 that rotates relative to the shaft member 11, the outer rotating member 14 can be easily fitted into the fitted portion 13a.

[0077] In addition, grooves 14g are provided on the inner peripheral surface of the fitting portion 14a, which prevents the connecting portions 14c from interfering with the expansion of the hole in the fitting portion 14a when the fitting portion 14a is heated, making it even easier to fit the outer rotating member 14 into the fitted portion 13a.

[0078] Furthermore, grooves 14g are provided on the inner peripheral surface of the fitting portion 14a, which more reliably reduces the force with which the fitting portion 14a tightens the fitted portion 13a. Therefore, if the outer rotating member 14 contracts after the fitting portion 14a is fitted into the fitted portion 13a, slippage occurs between the fitting portion 14a and the fitted portion 13a. This prevents a decrease in the fastening force between the first fastening portion 13b and the second fastening portion 14b of the multiple fasteners 15. In other words, if each fastener 15 is a bolt, a decrease in the axial tension of the bolt can be prevented.

[0079] Fig. 19 is a front view showing a rotating body 30 according to a first modified example of embodiment 3. Fig. 20 is a cross-sectional view taken along line XX-XX in Fig. 19.

[0080] In a first modification of the third embodiment, instead of groove 14g, an annular groove 13d is provided as a recess on the outer peripheral surface of fitting portion 13a. Groove 13d is provided continuously around the entire circumference of fitting portion 13a along the circumferential direction of fitting portion 14a. By providing groove 14g on the outer peripheral surface of fitting portion 13a, the contact area between fitting portion 14a and fitting portion 13a is reduced.

[0081] Other configurations of the first modification of the third embodiment are the same as those of the third embodiment. Even with this configuration, the same effects as those of the third embodiment can be obtained.

[0082] Alternatively, the groove 14g may be provided on the inner peripheral surface of the fitting portion 14a, and the groove 13d may be provided on the outer peripheral surface of the fitted portion 13a.

[0083] 21 is a front view showing a rotating body 30 according to a second modification of the third embodiment. In the second modification of the third embodiment, two arc-shaped grooves 13d are provided as recesses on the outer peripheral surface of the fitted portion 13a. That is, in the second modification of the third embodiment, the groove 13d in the first modification of the third embodiment is divided into two. The two grooves 13d are provided at equal intervals from each other in the circumferential direction of the fitting portion 14a.

[0084] Other configurations of the second modified example of the third embodiment are the same as those of the first modified example of the third embodiment. Even with this configuration, it is possible to obtain the same effects as those of the first modified example of the third embodiment.

[0085] The number of grooves 13d may be three or more.

[0086] 22 is a front view showing a rotating body 30 according to a third modification of the third embodiment. In this third modification, two arc-shaped grooves 14g are provided as recesses on the inner circumferential surface of the fitting portion 14a. That is, in this third modification, the groove 14g in the third embodiment is divided into two. The two grooves 14g are provided at equal intervals from each other in the circumferential direction of the fitting portion 14a.

[0087] Other configurations of the third modification of the third embodiment are the same as those of the third embodiment. Even with this configuration, the same effects as those of the third embodiment can be obtained.

[0088] The number of grooves 14g may be three or more.

[0089] 23 is a cross-sectional view showing a rotating body 30 according to a fourth modified example of embodiment 3. Note that Fig. 23 shows a cross section corresponding to the cross section taken along line XVI-XVI in Fig. 15.

[0090] In the fourth modification of the third embodiment, the hub 13 is configured by combining two members. That is, the first fastening portion 13b is configured as a separate member from the fitted portion 13a. The first fastening portion 13b is fixed to the outer periphery of the fitted portion 13a by shrink fitting.

[0091] Other configurations of the fourth modification of the third embodiment are the same as those of the third embodiment. Even with this configuration, the same effects as those of the third embodiment can be obtained.

[0092] Furthermore, since the hub 13 is divided into the fitted portion 13a and the first fastening portion 13b, the hub 13 can be easily transported.

[0093] The inner peripheral surface of the fitting portion 14a may be provided with one annular groove 14g or two or more arc-shaped grooves 14g.

[0094] 24 is a cross-sectional view showing a rotating body 30 according to a fifth modified example of embodiment 3. Note that Fig. 24 shows a cross section corresponding to the cross section taken along line XX-XX in Fig. 19.

[0095] In the fifth modification of the third embodiment, the hub 13 is configured by combining two members. That is, the first fastening portion 13b is configured as a separate member from the fitted portion 13a. The first fastening portion 13b is fixed to the outer periphery of the fitted portion 13a by shrink fitting.

[0096] Other configurations of the fifth modified example of the third embodiment are similar to those of the first modified example of the third embodiment. Even with this configuration, it is possible to obtain the same effects as those of the first modified example of the third embodiment.

[0097] Furthermore, since the hub 13 is divided into the fitted portion 13a and the first fastening portion 13b, the hub 13 can be easily transported.

[0098] The outer peripheral surface of the fitted portion 13a may be provided with one annular groove 13d or with two or more arc-shaped grooves 13d.

[0099] Furthermore, in embodiment 3 and all variants of embodiment 3, at least one of notch 14f similar to embodiment 1 and notch 13c similar to the first variant of embodiment 1 may be provided.

[0100] Embodiment 4 Next, Fig. 25 is a front view showing a rotating body according to embodiment 4. Fig. 26 is a cross-sectional view taken along line XXVI-XXVI in Fig. 25. Fig. 27 is a cross-sectional view taken along line XXVII-XXVII in Fig. 25.

[0101] In the fourth embodiment, an annular groove 14g is provided as a recess on the inner peripheral surface of the fitting portion 14a, instead of the pair of notches 14f in the second embodiment. The groove 14g is provided continuously around the entire circumference of the fitting portion 14a along the circumferential direction of the fitting portion 14a. By providing the groove 14g on the inner peripheral surface of the fitting portion 14a, the contact area between the fitting portion 14a and the fitted portion 13a is reduced.

[0102] Other configurations in the fourth embodiment are the same as those in the second embodiment.

[0103] In this rotating body 40, multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, excluding the multiple connecting portions 14c. Therefore, even when only the fitting portion 14a is heated, heat conduction to the second fastening portion 14b is suppressed, and the fitting portion 14a can be heated efficiently. This allows the hole in the fitting portion 14a to be expanded with a small amount of heat using a small heating device.

[0104] Therefore, according to the configuration of the fourth embodiment, the outer rotating member 14 can be easily fitted onto the shaft member 22 .

[0105] Furthermore, since multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, it is possible to efficiently heat only the fitting portion 14a, which also makes it easy to remove the outer rotating member 14 from the rotating shaft 21. Therefore, a new rotating body 40 disassembled into the rotating shaft 21 and the outer rotating member 14 can be carried to the installation site of the existing rotating body 40, and the existing rotating body 40 can be easily replaced with the new rotating body 40.

[0106] Furthermore, the outer rotating member 14 is rotatable together with the rotating shaft body 21. Therefore, in a rotating body 40 in which the rotating shaft body 21 rotates, the outer rotating member 14 can be easily fitted to the shaft member 22.

[0107] Furthermore, since the rotating shaft body 21 is divided into the shaft member 22 and the flange member 23, the rotating shaft body 21 can be easily transported.

[0108] In addition, grooves 14g are provided on the inner peripheral surface of the fitting portion 14a, which prevents the connecting portions 14c from interfering with the expansion of the hole in the fitting portion 14a when the fitting portion 14a is heated. This makes it even easier to fit the outer rotating member 14 onto the shaft member 22.

[0109] Furthermore, in the fourth embodiment, grooves 14g are provided on the inner peripheral surface of the fitting portion 14a, which more reliably reduces the force with which the fitting portion 14a tightens the shaft member 22. Therefore, if the outer rotating member 14 contracts after the fitting portion 14a is fitted into the fitted portion 13a, slippage occurs between the fitting portion 14a and the shaft member 22. This prevents a decrease in the fastening force between the first fastening portion 13b and the second fastening portion 14b by the multiple fasteners 15. That is, if each fastener 15 is a bolt, a decrease in the axial tension of the bolt can be prevented.

[0110] Fig. 28 is a front view showing a rotating body 40 according to a first modified example of embodiment 4. Fig. 29 is a cross-sectional view taken along line XXIX-XXIX in Fig. 28.

[0111] In a first modification of the fourth embodiment, instead of groove 14g, an annular groove 22b is provided as a recess in the outer peripheral surface of shaft member 22. Groove 22b is provided continuously around the entire circumference of shaft member 22 along the circumferential direction of fitting portion 14a. By providing groove 14g in the outer peripheral surface of shaft member 22, the contact area between fitting portion 14a and shaft member 22 is reduced.

[0112] Other configurations of the first modification of the fourth embodiment are the same as those of the fourth embodiment. Even with this configuration, the same effects as those of the fourth embodiment can be obtained.

[0113] Alternatively, the groove 14g may be provided on the inner peripheral surface of the fitting portion 14a, and the groove 22b may be provided on the outer peripheral surface of the shaft member 22.

[0114] 30 is a front view showing a rotating body 40 according to a second modified example of the fourth embodiment. In the second modified example of the fourth embodiment, two arc-shaped grooves 22b are provided as recesses on the outer peripheral surface of the shaft member 22. That is, in the second modified example of the fourth embodiment, the groove 22b in the first modified example of the fourth embodiment is divided into two. The two grooves 22b are provided at equal intervals from each other in the circumferential direction of the fitting portion 14a.

[0115] Other configurations of the second modified example of the fourth embodiment are the same as those of the first modified example of the fourth embodiment. Even with this configuration, it is possible to obtain the same effects as those of the first modified example of the fourth embodiment.

[0116] The number of grooves 22b may be three or more.

[0117] 31 is a front view showing a rotating body 40 according to a third modification of the fourth embodiment. In this third modification of the fourth embodiment, two arc-shaped grooves 14g are provided as recesses on the inner circumferential surface of the fitting portion 14a. That is, in this third modification of the fourth embodiment, the groove 14g in the fourth embodiment is divided into two. The two grooves 14g are provided at equal intervals from each other in the circumferential direction of the fitting portion 14a.

[0118] Other configurations of the third modification of the fourth embodiment are the same as those of the fourth embodiment. Even with this configuration, the same effects as those of the fourth embodiment can be obtained.

[0119] The number of grooves 14g may be three or more.

[0120] 32 is a cross-sectional view showing a rotating body 40 according to a fourth modified example of embodiment 4. Note that Fig. 32 shows a cross section corresponding to the cross section taken along line XXVI-XXVI in Fig. 25.

[0121] In the fourth modification of the fourth embodiment, the rotary shaft body 21 has a cylindrical fitted portion 21a and a flange-shaped first fastening portion 21b.

[0122] The first fastening portion 21b protrudes from the outer periphery of the fitted portion 21a radially outward from the fitted portion 21a. The rotating shaft body 21 in the fourth modification of the fourth embodiment is configured as a single component.

[0123] Other configurations of the fourth modification of the fourth embodiment are the same as those of the fourth embodiment. Even with this configuration, it is possible to obtain the same effects as those of the fourth embodiment. Furthermore, since the rotating shaft body 21 is configured as a single component, it is possible to reduce the number of components.

[0124] The inner peripheral surface of the fitting portion 14a may be provided with one annular groove 14g or two or more arc-shaped grooves 14g.

[0125] 33 is a cross-sectional view showing a rotating body 40 according to a fifth modified example of embodiment 4. Note that Fig. 33 shows a cross section corresponding to the cross section taken along line XXIX-XXIX in Fig. 28.

[0126] In the fifth modification of the fourth embodiment, the rotary shaft body 21 has a cylindrical fitted portion 21a and a flange-shaped first fastening portion 21b.

[0127] The first fastening portion 21 b protrudes radially outward from the outer periphery of the fitted portion 21 a. In the fifth modification of the fourth embodiment, the rotating shaft 21 is configured as a single component. An annular groove 21 d is provided as a recess on the outer circumferential surface of the fitted portion 13 a.

[0128] Other configurations of the fifth modified example of embodiment 4 are the same as those of the first modified example of embodiment 4. Even with this configuration, it is possible to obtain the same effects as those of the first modified example of embodiment 4. Furthermore, since the rotating shaft body 21 is configured as a single component, it is possible to reduce the number of components.

[0129] Two or more arc-shaped grooves 21d may be provided on the outer circumferential surface of the fitted portion 21a.

[0130] Furthermore, in embodiment 4 and all of the variants of embodiment 4, at least one of notch 14f similar to embodiment 2 and notch 22a similar to the first variant of embodiment 2 may be provided.

[0131] In addition, in all the embodiments and modifications, the number of connecting portions 14c may be three or more.

[0132] In addition, in all the embodiments and all the modified examples, the number of fasteners 15 may be two, three, five or more.

[0133] Here, FIG. 34 is a structural diagram showing an example of an elevator to which the rotating body 10, 20, 30 or 40 of the present disclosure is applied.

[0134] A machine room 52 is provided above the hoistway 51. An elevator hoisting machine 53 and a deflector sheave 56 are installed in the machine room 52.

[0135] The elevator hoist 53 has a hoist motor 54, a hoist brake (not shown), and a drive sheave 55. The hoist motor 54 rotates the drive sheave 55. The hoist brake keeps the drive sheave 55 stationary. The hoist brake also brakes the rotation of the drive sheave 55.

[0136] A suspension body 57 is wound around the drive sheave 55 and the deflector pulley 56. A plurality of ropes or a plurality of belts is used as the suspension body 57. A cage 58 is connected to a first end of the suspension body 57. A counterweight 59 is connected to a second end of the suspension body 57.

[0137] The car 58 and the counterweight 59 are suspended within the hoistway 51 by a suspension 57. The car 58 and the counterweight 59 move up and down within the hoistway 51 by rotating the drive sheave 55.

[0138] A pair of car guide rails 60 and a pair of counterweight guide rails 61 are installed in the hoistway 51. In Fig. 34, only one car guide rail 60 and one counterweight guide rail 61 are shown.

[0139] A pair of car guide rails 60 guide the car 58 as it moves up and down. A pair of counterweight guide rails 61 guide the counterweight 59 as it moves up and down.

[0140] The car 58 has a car frame 62 and a car chamber 63. The suspension body 57 is connected to the car frame 62. The car chamber 63 is supported by the car frame 62.

[0141] The driving sheave 55 is one of the rotating bodies 10, 20, 30, and 40. A suspension body 57 is wound around the outer peripheral surface of the outer peripheral portion 14d of the outer rotating member 14.

[0142] In such an elevator hoisting machine 53, it may become necessary to replace the drive sheave 55 or the pair of bearings 12 after long-term use. In this case, because the rotating body 10, 20, 30, or 40 is used as the drive sheave 55, the drive sheave 55 can be easily transported, and the drive sheave 55 or the pair of bearings 12 can be easily replaced.

[0143] The elevator type is not limited to that shown in FIG. 34, but may be, for example, a 2:1 roping type.

[0144] The elevator may also be a machine room-less elevator, a double-deck elevator, a one-shaft multi-car elevator, etc. In a one-shaft multi-car elevator, an upper car and a lower car located directly below the upper car each independently ascend and descend in a common elevator shaft.

[0145] 10, 20, 30, 40 Rotating body, 11 Shaft member, 12 Bearing, 13 Hub (inner rotating member), 13a Fitted portion, 13b First fastening portion, 13c Notch (recess), 13d Groove (recess), 14 Outer rotating member, 14a Fitting portion, 14b Second fastening portion, 14c Linking portion, 14e Gap, 14f Notch (recess), 14g Groove (recess), 15 Fastener, 21 Rotating shaft body (inner rotating member), 21a Fitted portion, 21b First fastening portion, 21c Notch (recess), 21d Groove (recess), 22 Shaft member (fitted portion), 22a Notch (recess), 22b Groove (recess), 23 Flange member (first fastening portion), 53 Elevator hoist, 54 Hoist motor, 55 Drive sheave.

Claims

1. A rotatable inner rotating member having a fitting portion and a flange-shaped first fastening portion that protrudes radially outward from the outer circumference of the fitting portion, and An outer rotating member fixed to the inner rotating member and rotating together with the inner rotating member. Equipped with, The outer rotating member is An annular fitting portion that is fitted into the fitting portion, A disc-shaped second fastening portion is provided on the radially outer side of the fitting portion, overlaps the first fastening portion with respect to the fitting portion in the axial direction, and is fixed to the first fastening portion by a plurality of fasteners, A plurality of connecting portions are provided between the fitting portion and the second fastening portion at intervals from each other in the circumferential direction of the fitting portion, and connect the fitting portion and the second fastening portion. It has, A rotating body having multiple gaps between the fitting portion and the second fastening portion, excluding the multiple connecting portions.

2. The rotating body according to claim 1, wherein the inner rotating member is mounted on the shaft member via a bearing and is a hub that rotates relative to the shaft member about the axis of the shaft member.

3. The aforementioned inner rotating member is a rotating shaft, The rotating body according to claim 1, wherein the outer rotating member is rotatable together with the rotating shaft body about the axis of the rotating shaft body.

4. The first fastening portion is configured as a separate component from the fitted portion and is fixed to the outer circumference of the fitted portion by shrink fitting, as described in claim 1.

5. The rotating body according to claim 2, wherein the first fastening portion is configured as a separate member from the fitted portion and is fixed to the outer circumference of the fitted portion by shrink fitting.

6. The rotating body according to claim 3, wherein the first fastening portion is configured as a separate member from the fitted portion and is fixed to the outer circumference of the fitted portion by shrink fitting.

7. The rotating body according to claim 1, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a recess that reduces the contact area between the fitting portion and the fitted portion.

8. The rotating body according to claim 2, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a recess that reduces the contact area between the fitting portion and the fitted portion.

9. The rotating body according to claim 3, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a recess that reduces the contact area between the fitting portion and the fitted portion.

10. The rotating body according to claim 4, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a recess that reduces the contact area between the fitting portion and the fitted portion.

11. The rotating body according to claim 5, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a recess that reduces the contact area between the fitting portion and the fitted portion.

12. The rotating body according to claim 6, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a recess that reduces the contact area between the fitting portion and the fitted portion.

13. At least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with a plurality of notches as recesses. The rotating body according to any one of claims 7 to 12, wherein the plurality of notches are located at the same positions as the plurality of connecting portions in the circumferential direction of the fitting portion.

14. The rotating body according to any one of claims 7 to 12, wherein at least one of the inner circumferential surface of the fitting portion and the outer circumferential surface of the fitted portion is provided with one or more grooves as recesses along the circumferential direction of the fitting portion.

15. Drive sheave, and Hoisting motor that rotates the drive sheave Equipped with, An elevator hoisting machine in which the rotating body described in claim 1 is used as the drive sheave.