Elevator hoist and elevator equipment

Abstract

In the elevator hoist, the housing is formed with a main shaft portion, a cylindrical connection portion connected to the main shaft portion, a flat bottom plate portion connected to the connection portion, and a cylindrical stator mounting portion connected to the bottom plate portion. The rotor is mounted on the main shaft portion so as to be rotatable about the axis of the main shaft portion. The diameter of the connection portion gradually increases from the main shaft portion to the bottom plate portion. An opening is provided in the bottom plate portion. The connection portion is connected to the edge of the opening.

Description

[Technical field]

[0001] The present disclosure relates to an elevator machine and an elevator device. [Background technology]

[0002] In a conventional elevator hoist, a cylindrical fixed shaft, a disk portion, and a stator mounting portion are formed on a fixed frame. The stator mounting portion is located radially outward from the fixed shaft. The disk portion is provided between the fixed shaft and the stator mounting portion. The disk portion also protrudes radially outward from the fixed shaft.

[0003] A pair of inclined portions is partially provided on the disk portion. Each inclined portion is inclined with respect to a plane perpendicular to the axis of the fixed main shaft. A fan is attached to each inclined portion (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2004 / 108579 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional elevator hoist as described above, a large load acts on the fixed shaft during operation of the elevator device, and a large force also acts on the disk part connected to the fixed shaft. This requires the thickness of the disk part to be thick, which increases the weight of the fixed frame.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide an elevator hoist and an elevator apparatus that can reduce the weight of the housing. [Means for solving the problem]

[0007] The elevator hoist according to the present disclosure includes a housing, a drive sheave, and a hoist motor having a rotating body rotatable relative to the housing, and a motor stator attached to the housing and a motor rotor attached to the rotating body, the housing is formed with a main shaft portion, a connection portion connected to the main shaft portion, a flat bottom plate portion connected to the connection portion, and a cylindrical stator attachment portion connected to the bottom plate portion, the rotating body is attached to the main shaft portion so as to be rotatable around the axis of the main shaft portion, the connection portion is cylindrical, and the diameter of the connection portion gradually increases from the main shaft portion to the bottom plate portion, an opening is provided in the bottom plate portion, and the connection portion is connected to the edge of the opening. Effect of the Invention

[0008] According to the present disclosure, the housing of an elevator hoisting machine can be made lighter. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram showing an elevator device according to a first embodiment. [Diagram 2] FIG. 2 is a rear view showing the elevator hoisting machine of FIG. 1. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 3 is a front perspective view of the housing of FIG. 2. [Figure 6] FIG. 3 is a rear perspective view of the housing of FIG. 2. [Figure 7] FIG. 11 is a rear perspective view showing a housing of an elevator hoisting machine according to a second embodiment. [Figure 8] FIG. 11 is a cross-sectional view of an elevator hoisting machine according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1 Fig. 1 is a schematic configuration diagram showing an elevator device according to embodiment 1. In the figure, a machine base 2 is installed at the top of a hoistway 1. An elevator hoisting machine 3 is installed on the machine base 2.

[0011] A suspension body 4 is wound around the elevator hoist 3. As the suspension body 4, a plurality of ropes are used.

[0012] A first cleat 5 and a second cleat 6 are provided at the top of the hoistway 1. The suspension body 4 has a first end 4a and a second end 4b. The first end 4a is connected to the first cleat 5. The second end 4b is connected to the second cleat 6.

[0013] The car 7 and the counterweight 8 are suspended in the hoistway 1 by a suspension body 4. A first car hoisting pulley 9a and a second car hoisting pulley 9b are provided below the car 7. A counterweight hoisting pulley 10 is provided above the counterweight 8.

[0014] The suspension body 4 is wound around the first car sheave 9a, the second car sheave 9b, the elevator hoist 3, and the counterweight sheave 10, in that order from the first cleat 5 side. That is, the roping system of the elevator apparatus of the first embodiment is a 2:1 roping system.

[0015] Fig. 2 is a rear view showing the elevator hoist 3 of Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III of Fig. 2. Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 2. Fig. 5 is a front perspective view showing the housing of Fig. 2. Fig. 6 is a rear perspective view showing the housing of Fig. 2.

[0016] The elevator hoist 3 includes a housing 11, a rotating body 12, a bearing 13, and a hoist motor 14.

[0017] The housing 11 is fixed onto the machine base 2. The housing 11 is integrally formed with a cylindrical main shaft portion 11a, a tubular connection portion 11b, a flat bottom plate portion 11c, a cylindrical stator mounting portion 11d, and legs 11e.

[0018] The connecting portion 11b is connected to the main shaft portion 11a. The bottom plate portion 11c is connected to the connecting portion 11b. The stator mounting portion 11d is connected to the bottom plate portion 11c.

[0019] The entire housing 11 is made of the same material. Steel is used as the material of the housing 11. In addition, by using alloy steel, cast iron, or the like as the steel, the strength of the housing 11 can be increased.

[0020] When the elevator hoist 3 is installed on the machine base 2, the axis C of the main shaft portion 11a is horizontal. Fig. 3 shows a vertical cross section of the elevator hoist 3 including the axis C. Fig. 4 shows a horizontal cross section of the elevator hoist 3 including the axis C.

[0021] A through hole 11f is provided at the center of the main shaft portion 11a along the axis C. The main shaft portion 11a has a first main shaft end 11g and a second main shaft end 11h. The first main shaft end 11g is one end of the main shaft portion 11a in the axial direction of the main shaft portion 11a. The second main shaft end 11h is the other end of the main shaft portion 11a in the axial direction of the main shaft portion 11a. The axial direction of the main shaft portion 11a is a direction along the axis C.

[0022] One end of the connection portion 11b in the axial direction of the main shaft portion 11a is directly connected to the second main shaft end 11h. A circular opening 11i is provided in the bottom plate portion 11c. The other end of the connection portion 11b in the axial direction of the main shaft portion 11a is directly connected to the edge of the opening 11i. Thus, the bottom plate portion 11c is connected to the main shaft portion 11a via the connection portion 11b.

[0023] The diameter of the connecting portion 11b gradually increases from the main shaft portion 11a toward the bottom plate portion 11c. The outer shape of the connecting portion 11b in the first embodiment is a right circular cone with the apex removed. In addition, in a cross section including the axis C, the inclination angle of the outer circumferential surface of the connecting portion 11b with respect to the axis C is preferably in the range of 42 degrees to 48 degrees, and 45 degrees is particularly preferable.

[0024] 3, in a vertical cross section of housing 11 including axis C, the thickness of connection portion 11b gradually increases toward bottom plate portion 11c. In addition, the thickness of connection portion 11b in the vertical cross section of housing 11 including axis C is thicker than the thickness of connection portion 11b in a horizontal cross section of housing 11 including axis C.

[0025] 4, the thickness of the connecting portion 11b is the same as the thickness of the bottom plate portion 11c. However, in a horizontal cross section of the housing 11 including the axis C, the thickness of the connecting portion 11b may be thinner than the thickness of the bottom plate portion 11c.

[0026] The bottom plate portion 11c is parallel to a plane perpendicular to the axis C. The stator mounting portion 11d is connected to the connecting portion 11b via the bottom plate portion 11c. The leg portion 11e is formed at the lower end of the stator mounting portion 11d. The leg portion 11e is fixed to the machine base 2.

[0027] The rotating body 12 has a rotating member 15 and a drive sheave 16. The rotating member 15 is attached to the main shaft portion 11a via a bearing 13 so as to be rotatable about an axis C. In other words, the rotating body 12 is supported by the main shaft portion 11a, and is rotatable relative to the housing 11.

[0028] Rotating member 15 is integrally formed with cylindrical bearing holding portion 15a, cylindrical sheave fixing portion 15b, disc-shaped braked portion 15c, and cylindrical rotor mounting portion 15d.

[0029] The bearing 13 is held inside the bearing holder 15a. The sheave fixing portion 15b protrudes parallel to the axis C from the bearing holder 15a on the opposite side to the bottom plate portion 11c and the connection portion 11b.

[0030] The braked portion 15c protrudes from the outer circumferential surface of the bearing holder 15a toward the outside in the radial direction of the bearing holder 15a. The radial direction of the bearing holder 15a is perpendicular to the axis C. A brake shoe of a hoist brake (not shown) is pressed against the braked portion 15c. This keeps the rotating body 12 stationary.

[0031] The rotor mounting portion 15d protrudes parallel to the axis C from the braked portion 15c toward the bottom plate portion 11c.

[0032] The drive sheave 16 is fitted and fixed in the sheave fixing portion 15b. This allows the drive sheave 16 to rotate together with the rotating member 15. The suspension body 4 is wound around the drive sheave 16. The car 7 and the counterweight 8 move up and down in the hoistway 1 by rotating the drive sheave 16.

[0033] The hoist motor 14 rotates the rotating body 12. In addition, the hoist motor 14 has a motor stator 17 and a motor rotor 18.

[0034] The motor stator 17 is attached to the inner circumferential surface of the stator attachment portion 11d. The motor stator 17 has a plurality of coils. The specific configuration of the motor stator 17 is omitted in Figs. 3 and 4.

[0035] The motor rotor 18 is attached to the rotor attachment portion 15d. The motor rotor 18 faces the motor stator 17. The motor rotor 18 has a plurality of magnets.

[0036] In such an elevator hoist 3 and elevator device, a main shaft portion 11a, a connection portion 11b, a bottom plate portion 11c, and a stator mounting portion 11d are formed in the housing 11. Therefore, compared to a configuration in which a main shaft, which is a separate member from the housing, is attached to the housing, the number of parts is reduced, and the number of assembly steps can be reduced.

[0037] In addition, no load is applied when fitting the main shaft into the housing, and no stress is concentrated on the fitting portion. Therefore, there is no need to make the thickness of housing 11 particularly large, and the weight of housing 11 can be reduced. This allows the weight of elevator hoisting machine 3 to be reduced.

[0038] Furthermore, the connection portion 11b is connected to the edge of the opening 11i of the bottom plate portion 11c. Furthermore, the bottom plate portion 11c is connected to the main shaft portion 11a via the connection portion 11b. The connection portion 11b is cylindrical, and the diameter of the connection portion 11b gradually increases from the main shaft portion 11a toward the bottom plate portion 11c.

[0039] This allows the bending load acting on the main shaft portion 11a to be efficiently and effectively distributed across the entire housing 11. This allows the wall thickness of the housing 11 to be reduced, making the housing 11 even lighter.

[0040] Furthermore, the rigidity of the housing 11 can be increased, and deflection of each part of the housing 11 can be suppressed. This makes it possible to suppress deflection and deformation of the parts attached to the housing 11, i.e., the motor stator 17, the bearings 13, and the rotor 12. Therefore, loss in the elevator hoisting machine 3 can be reduced, and the performance of the elevator hoisting machine 3 can be improved.

[0041] Furthermore, since the outer shape of the connection portion 11b is a right circular cone, the stress generated in the housing 11 can be more efficiently dispersed and reduced.

[0042] Furthermore, by setting the inclination angle of the outer circumferential surface of connection portion 11b with respect to axis C within the range of 42 degrees to 48 degrees, it is possible to more reliably reduce the stress generated in housing 11 and further reduce the weight of housing 11. In particular, by setting the inclination angle to 45 degrees, it is possible to most effectively reduce the stress generated in housing 11.

[0043] Moreover, by making the thickness of connecting portion 11b thinner than the thickness of bottom plate portion 11c in a horizontal cross section of housing 11 including axis C, it is possible to further reduce the weight of housing 11. Also, it is possible to more efficiently and effectively maintain the section modulus, moment of inertia, and the like against a load acting on main shaft portion 11a, and the load acting on main shaft portion 11a can be efficiently supported by housing 11 as a whole.

[0044] In addition, in a vertical cross section of the housing 11 including the axis C, the thickness of the connection portion 11b gradually increases toward the bottom plate portion 11c. This allows the housing 11 to be made lighter while increasing its strength.

[0045] Embodiment 2 Next, Fig. 7 is a rear perspective view showing the housing 11 of the elevator hoisting machine 3 according to the second embodiment. In the second embodiment, a pair of recesses 11j is provided in the bottom plate portion 11c. The pair of recesses 11j are provided in the end surface of the bottom plate portion 11c in the direction parallel to the axis C, among the outer surface of the bottom plate portion 11c. The pair of recesses 11j are also provided in the bottom plate portion 11c on both the left and right sides of the connection portion 11b.

[0046] As a result, the thickness of bottom plate portion 11c in a horizontal cross section of housing 11 including axis C is thinner than the thickness of bottom plate portion 11c in a vertical cross section of housing 11 including axis C. In other words, the thickness of bottom plate portion 11c is thinner on the left and right sides of connection portion 11b than above and below connection portion 11b.

[0047] Other configurations in the second embodiment are similar to those in the first embodiment.

[0048] Even with this configuration, it is possible to obtain the same effects as in embodiment 1. Furthermore, since the thickness of the bottom plate portion 11c is thin on the left and right sides of the connection portion 11b, the housing 11 can be made even lighter.

[0049] In addition, because the thickness of bottom plate portion 11c is greater above and below connection portion 11b, the portions of bottom plate portion 11c above and below connection portion 11b function as ribs. This makes it possible to more efficiently and effectively maintain the section modulus, area second moment, and the like against the load acting on main shaft portion 11a, and allows housing 11 as a whole to efficiently support the load acting on main shaft portion 11a.

[0050] Embodiment 3 Next, Fig. 8 is a cross-sectional view of the elevator hoisting machine 3 according to the third embodiment, showing a vertical cross section of the elevator hoisting machine 3 including the axis C. In the third embodiment, the connection portion 11b is curved with a uniform curvature so as to be convex toward the inside of the connection portion 11b.

[0051] Other configurations in the third embodiment are similar to those in the first embodiment.

[0052] Even with this configuration, it is possible to obtain the same effects as in embodiment 1. Furthermore, the load acting on main shaft portion 11a can be more efficiently and effectively distributed throughout housing 11, making it possible to reduce the weight of housing 11 while maintaining sufficient strength.

[0053] Incidentally, the housing 11 in the third embodiment may be formed with a recess 11j similar to that in the second embodiment.

[0054] In the first to third embodiments, the suspension 4 may be a plurality of belts.

[0055] In addition, the type of the elevator device is not limited to the type shown in Fig. 1, and may be, for example, a 1:1 roping type. In addition, the elevator hoist 3 may be installed at a position other than the top of the hoistway 1.

[0056] The elevator system may be an elevator system having a machine room, a double-deck elevator, a one-shaft multi-car elevator, etc. The one-shaft multi-car system is a system in which an upper car and a lower car arranged directly below the upper car independently ascend and descend in a common elevator shaft. [Explanation of symbols]

[0057] 3 elevator hoist, 11 housing, 11a main shaft portion, 11b connection portion, 11c bottom plate portion, 11d stator mounting portion, 11i opening, 12 rotating body, 14 hoist motor, 16 drive sheave, 17 motor stator, 18 motor rotor.

Claims

1. A housing, a rotating body having a drive sheave and rotatable with respect to the housing, and a hoisting machine motor having a motor stator mounted on the housing and a motor rotor mounted on the rotating body is provided, the housing is formed with a main shaft portion, a connecting portion connected to the main shaft portion, a flat bottom plate portion connected to the connecting portion, and a cylindrical stator mounting portion connected to the bottom plate portion, the rotating body is mounted on the main shaft portion so as to be rotatable about the axis of the main shaft portion, the connecting portion is cylindrical, the main shaft portion has a first main shaft end that is one end of the main shaft portion in the axial direction of the main shaft portion and a second main shaft end that is the other end of the main shaft portion in the axial direction of the main shaft portion, one end of the connecting portion in the axial direction of the main shaft portion is directly connected to the second main shaft end, the bottom plate portion is provided with an opening, the other end of the connecting portion in the axial direction of the main shaft portion is directly connected to the edge of the opening, the diameter of the connecting portion gradually increases continuously from the main shaft portion toward the bottom plate portion, the bottom plate portion is provided with an opening, the connecting portion is an elevator hoisting machine connected to the edge of the opening.

2. The elevator hoisting machine according to claim 1, wherein in a horizontal cross-section of the housing including the axis, the wall thickness of the connecting portion is thinner than the wall thickness of the bottom plate portion.

3. The elevator hoisting machine according to claim 1 or claim 2, wherein in a vertical cross-section of the housing including the axis, the wall thickness of the connecting portion gradually becomes thicker toward the bottom plate portion.

4. The elevator hoisting machine according to claim 1 or claim 2, wherein the wall thickness of the bottom plate portion in a horizontal cross-section of the housing including the axis is thinner than the wall thickness of the bottom plate portion in a vertical cross-section of the housing including the axis of the main shaft portion.

5. The elevator hoisting machine according to claim 1 or claim 2, wherein the connecting portion is curved so as to protrude inward of the connecting portion.

6. An elevator device comprising the elevator hoisting machine according to claim 1 or claim 2.

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