JPS62121190A - Winding machine for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevator hoisting machine, and more particularly to an elevator hoisting machine equipped with a speed reducer.

[Conventional technology]

Recently, as shown in FIG. 3, elevator hoisting machines have been equipped with an electric motor 11 on the input shaft side of a reducer box 10 constituting a reducer, and a sheave 5 around which the main rope is wound around the opposite output shaft side. Consideration is being given to shortening the distance between the electric motor 11 and the sheave 5 to reduce the installation space in the machine room. For this reason, the brake device 12 has to be installed at a location away from the reducer box 10 of the sheave 5, and as a result, the brake device 12 is placed on the bearing 20 that fits the sheave 5 and supports the end of the rotation 41114.
A structure for mounting the key device 12 is being considered. In addition, for a hoisting machine without a reducer, Japanese Patent Application Laid-Open No. 57-9848
As in Publication No. 4, the brake device 12 has a structure in which it is supported on a sheave bearing on the side remote from the electric motor.

[Problem that the invention seeks to solve]

By the way, there are various causes of vibration and noise in the elevator car room, but among them are vibrations of the hoisting machine 3 itself.

It goes without saying that reducing noise greatly contributes to increasing the quietness in the elevator car interior. In the hoisting machine 3 with a reduction gear, the meshing sound of the gears 13.18 cannot be prevented, but by avoiding the natural frequency of the reduction gear box 10 from the meshing frequency of the gears 13.18, resonance phenomena can be prevented and vibrations can be reduced. , noise can be reduced. Reducer box 1
There are various ways to change the natural frequency of 0, but the general method is to increase the thickness of the reducer box 10 and add weights to the resonance parts, but this increases the weight of the reducer box 10 and reduces the space in the machine room. There were disadvantages such as increased reaction force on the building and difficulty in lifting operations.

The object of the present invention is to reduce the vibration of the reducer box, i! LeK to reduce sound
To provide a suitable revitalizer hoist.

[Means for solving problems]

The present invention aims to reduce the vibration and noise of the reducer box.

The reduction gear and the bearing of the sheave located on the opposite side of the reduction gear are integrated using a connecting fitting.

[Effect]

As explained above, by supporting the reducer box, the natural frequency of the reducer box is changed to avoid the meshing frequency of the gears in the reducer box.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. A hoisting machine 3 is supported by anti-vibration rubber 4 on the floor 2F of the FC machine room 2, which is installed on the hoistway 1 of the 2V elevator.
A main rope 7 is wound twice around the sheave 5 and deflection wheel 6 of the hoisting machine 3, one end of the main rope 7 is passed through a pulley at a heel 8, and the other end is connected to a mating sheave (not shown). It is fixed to the floor 2F of machine room 2 through a pulley, and has a 2:10-ping. The hoisting machine 3 is a reducer box 10t fixed on the pace 9
- The electric motor 11 is placed on one side of the center.

A sheave 5 and a brake 12 are arranged on the opposite side.

A small gear 13 is fitted and fixed to the shaft 118 of the electric motor 11,
The electric motor 11 is mounted on the speed reducer box 10 with seven lunges. The sheave 5 is fitted and fixed to a rotating shaft 14, and one side of the rotating shaft 14 passes through the reducer box 10 via a bearing 15. This bearing 15 is supported by an end cover 16 and fixed by a cover 17, and this end cover 16 is attached to the reducer box 10. A large gear 18 that meshes with the small gear 13 is fixed to the end of the shaft inside the reducer box 10. same.

The end cover 16 is fitted into and supported by nine openings on the side opposite to the electric motor of the reducer box 10. The other end of the rotating shaft 14 is supported by a bearing 19 attached to a bearing stand 20 fixed on the base 9 via an adjustment liner 21. Both sides of the bearing 19 are covered with covers 22. It is covered with a cover 23. On the other hand, the brake device 12 is arranged offset from the center of the sheave 5 toward the bearing stand 20 side, and is supported on the upper part of the bearing stand 20. Here, when the electric motor 11 rotates, the pinion 13 fitted to the shaft 118 of the electric motor 11 rotates,
It meshes with the large gear 18 to transmit power and decelerate it, causing the rotary shaft 14 to rotate, and the sheave 5 fitted to the rotary shaft 14 to rotate, frictionally driving the main rope and moving the heel 8 up and down. The meshing frequency of the small gear 13 and the large gear 18 is the motor 1
It is determined by the number of rotations of gearbox 1 and the number of teeth of small gear 13, but reducer box 1
Normally, the natural frequency of 0 has several peak values depending on the shape, plate thickness, etc., and when the peak value of the natural frequency of the reducer box 10 is synchronized with the meshing frequency of the gear 13.18, a resonance phenomenon occurs. This leads to the generation of vibration and noise. In order to shift the peak value of the natural frequency of the reducer box 10, the plate thickness of the reducer box 10 may be increased, the shape may be optimized, or weights may be added to the resonance points, but in any case, the reduction gear box 10
This is not a good solution as it increases the weight of the machine, which increases the reaction force on the floor of the machine room 2 and makes lifting work difficult. According to one embodiment of the present invention, connecting fittings 24 are provided between the lower surface 12a of the brake device 12 attached to the upper part of the bearing pedestal 20 and the upper side surface 10a of the reduction gear box 10 facing the bearing pedestal 20. By fixing to the surface with bolts 25, the peak value of the natural frequency of the reducer box 10 can be moved, and the meshing frequency of the gears 13 and 18 can be avoided. Also, a reducer 3 and a bearing stand 2 fixed to the base 9
The ease of vibration due to the open structure with a groove bottom at 0 is reduced by the difficulty of vibration due to the closed structure using the connecting metal base 24, that is, the vibration amplitude of the reducer box 10 is reduced. It has the effect of reducing vibration and noise. moreover,
The connection fittings 24 and the V-key device 12 are supported stably, and the structure is strong against the reaction force when the V-key is activated. It goes without saying that the reduction gear box 10 and the bearing stand 20 may be directly fastened together using the connecting fitting 24 without using the brake group fil 12, and that they may be integrally formed by casting.

〔Effect of the invention〕

According to the present invention, in an unwinding machine in which a reducer box with an electric motor attached to one end on a base is fixed, a bearing stand is provided at the other end, and a rotating shaft fitted with a sheave is supported by the reducer and the bearing stand. , the reduction gear box and bearing stand are fastened and integrated with the connecting fittings, reducing the vibration of the reduction gear box which increases the meshing vibration of the gears, and reducing the vibration transmitted to the rider through the main rope driven by the sheave. In addition, noise from the reducer box and the like due to air propagation is reduced, resulting in a quiet elevator.

[Brief explanation of drawings]

Fig. 1 is a side view showing the peripheral structure of an unwinding machine for an elevator according to the present invention, Fig. 2 is an enlarged sectional view showing the unwinding machine in Fig. 1, and Fig. 3 is an unwinding machine for a conventional elevator. FIG. 3... Unwinder, 5... Sheave, 9... Base, 10
...Reducer box, 11...Electric motor, 12...PuV-
Ki, 20...Bearing stand, 24...Connection fittings.
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Claims (1)

[Claims] 1. A reduction gear box is fixed on a base fixedly installed on the building floor of the elevator machine room, an electric motor is installed on the input shaft side of the reduction gear box, and an output shaft on the opposite side of the electric motor is installed. An elevator comprising a sheave fitted around the main rope, an extended end of the output shaft supported by a bearing pedestal fixed on the base, and a brake device for braking the sheave attached to the bearing pedestal. 1. A hoisting machine for an elevator according to claim 1, wherein the reducer box and the bearing stand are integrally fastened together using a connecting fitting at an upper part opposite to the base. 2. The hoisting machine for an elevator according to claim 1, wherein the connecting fitting is connected to the bearing via the brake device.