JPS61150981A - Flexible coupling of 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 a flexible joint that connects an elevator hoist and a drive motor thereof.

[Prior Art] A conventional elevator will be explained based on FIGS. 3 to 6. (1) A hoistway in which an elevator car (2) goes up and down, and (3) a hoistway that is adjacent to the lower part of the hoistway (1). (4) is a hoisting machine installed in the machine room (3) via a machine stand (5), (6) is a machine that uses the driving force of the hoisting machine (4) as 7) is a drum of the hoisting machine (0), and this drum (8) and the guide car (1) suspended from the ceiling of the hoistway (1)
8) The main rope (8) is hooked between the cables 8 and 8, and the cage (2) suspended from the lower end of the main rope (8) is moved up and down. Note that (10) is a bracket that is fixed to the ceiling of the hoistway (1) and supports the guide wheel (8).

Therefore, Fig. 4 is a sectional view taken along the IT-rV line in Fig. 3, and in the figure, (11) is a hoisting machine that reduces the rotational speed of the motor (12) transmitted by the brake wheel (13). (4) will be taught using a reducer that rotates at a reduced speed. This brake device (13) is shown in detail in Figures 5 and 6. In the figures, (14) is the input shaft (l) of the reducer (11).
(1B) is the motor (1B).
2) a joint fixedly installed on the output shaft (12a), (17)
.

(18) connects both of them to their respective plurality of holes (14a).
.

Bolts and nuts connected via (lea), (19
) and (20) are an elastic body fixed to the base side of each bolt (17) and a ring covering the elastic body, which is formed to fit into a hole (14a) drilled in the brake wheel.

Next, to explain the operation, when the motor (12) is driven and rotated by a thyristor (not shown), the joint (16) attached to the motor shaft (12a) rotates together with the brake wheel (14) connected to it. However, this rotational force is transmitted to the reduction gear (11) via the shaft (lla). The reducer (11) reduces the rotational speed of the motor (12) to a predetermined rotational speed, drives the hoisting machine (0) at a reduced speed, and rotates the car (
2) will move up and down while accelerating and decelerating.

However, in an elevator with one or more configurations, during acceleration/deceleration, the distortion rectified waveform of the thyristor causes the motor (
When controlling
0Hz vibration noise is generated in the motor (12), and these vibrations are transmitted to the hoisting machine (4), vibrating the floor of the machine room (3), or passing through the main rope (9) to the bracket (10).
, the elevator car (2) is guided, causing discomfort to passengers and residents of the elevator.

Therefore, in order to reduce the vibration transmission due to the excitation frequency twice the AC frequency, an elastic body (18) fixed to the pole (17) connecting the brake wheel (14) and the joint (1B) is used.
The compression spring constant is selected, and the torsional natural frequency of this flexible joint is set to a value sufficiently lower than the excitation frequency.

However, the torsional natural frequency fn is generally determined by the following equation.

K = n * Kc R2” (2) n; Number of port Kc; Compression spring constant R of port The moment of inertia of the entire joint (IB), ■2 is the moment of inertia of the brake wheel (14), the cage (2), the drum (8), etc. all converted to the input shaft (lla), and K is This is the torsion spring constant due to the elastic body (18).These moments of inertia II and Iz are approximately determined by the winding 1 (0) and motor (12) applied to the elevator.

In addition, the hoisting machine (4) is generally standardized in design so that it can be equipped with a motor (12), so each motor (12) has a moment of inertia)! Since + is different,
The appropriate compression spring constant of the elastic body (18) is different for each combination of the hoist (4) and the motor (12).

Therefore, if the elastic body (18) has a sufficiently low compression spring constant and the torsional natural frequency fn is made small, there will be no problem.
Generally speaking, the life of the elastic body (19) will be shortened unless the deflection rate of the elastic body (19) is about 20% or less. Therefore, in Japanese Patent Application Laid-Open No. 52-29047, the outer diameter or the hardness of the elastic body (18) is changed as a means of changing the spring constant. We are proposing a means to solve the above problems by changing.

[Problems to be Solved by the Invention] However, in the conventional connection means using the elastic body (18), the elastic body (18) is integrally molded with the ring (20) and the ring (17). Therefore, each time the spring constant of the elastic body (18) is changed, the outer diameter must be changed, and therefore, in order to mold these, a mold that matches each outer diameter must be provided. Moreover, the dimensions of the hole (14a) of the brake wheel (14) change according to this change in the outer diameter, and it is necessary to prepare multiple types of brake wheels (14). ) If the hardness of the material changes, of course a corresponding material will be required and the number of materials will increase. Therefore, in the conventional manufacturing of joints (1B), molds and brake wheels (1B) are always required.
4) and the elastic body (18), etc., each had the problem of having to prepare a plurality of materials and select the optimal one for each component according to the determination of each compression spring constant. .

The present invention was made to solve the above-mentioned problems, and aims to improve production efficiency by unifying the mold, brake wheel, etc.

[Means for Solving the Problems] The present invention is configured so that various compression spring constants can be obtained by changing the inner diameter of an elastic body attached to a bolt connecting a brake wheel and a joint. It is.

[Function] According to the present invention, any compression spring constant can be obtained by changing the inner diameter of the elastic body attached to the bolt, which eliminates the need for multiple molds and brake wheels, improving production efficiency. can be done.

[Example 1] Hereinafter, the present invention will be explained based on the embodiment shown in Figs. 1 and 2, with the same or corresponding parts as those in the conventional art being given the same reference numerals. In Fig. 1, (17a) is a bolt ( 17), and its outer end surface is made of an elastic body (19).
The joint (1B) is formed to match the side end surface of the joint (1B).
16) and the brake wheel (14) are positioned at the time of connection. Therefore, the flange portion (17a) is formed to have a larger diameter than the straight body portion (1?b) where the bolt (17) contacts the elastic body (19).

Therefore, (21) and (22) are the upper and lower molds for molding the bolt (17), the elastic body (18), and the ring (20) in one body, and the lower mold (22) is attached to the upper mold (21). It is configured to be positioned using a plurality of vertical pins (23). In addition, the upper mold (21) has Pol) (17)
A recess (21a) that matches the outer diameter of the head, elastic body (18), and ring (20) is formed, while the lower mold (22) has a plunge part (17a) of the bolt (17) and a recess (21a) that matches the outer diameter of the ring (20). A recess (22a) is formed to accommodate the subsequent threaded portion and to mold an elastic body (19) surrounding the flange portion (17a).

Therefore, the lower die (22) is guided by the pin (23).

(17) installed in the upper mold (21) into which the
Next, the liquid elastic body (19) in a high temperature state is placed in the upper mold (2).
1) When it is injected into the space formed between the lower mold (22) and cooled.

It is possible to mold the elastic body (18) (1?) wrapped around the elastic body (18).

The compression spring constant of such an elastic body (19) and the elastic body (
18), the relationship shown in the following equation holds true.

Kc= π(Eap + G) l/1Bge
(r2/rt)”・(3) Eap*Young’s modulus of the elastic body, P: Load acting on the bolt with rubber, h: Rubber height (see Figure 2) G: Transverse elastic modulus of the elastic body, rl: Elasticity Outer diameter r2 of the body; inner diameter of the elastic body, that is, as is clear from equations (3) and (4), according to this embodiment, the inner diameter (rl) of the elastic body (19) is made small; By decreasing the compression spring constant (Kc) and decreasing the inner diameter (r+), the height (h) of the rubber increases, so it is possible to suppress an increase in the deflection rate.This maintains the life of the rubber. However, it is possible to reduce the compression spring constant (Kc) and torsion spring constant.Furthermore, even when molding the bolt (17), there is no need to change the mold each time. , ring (20), an inexpensive fitting (IB) that improves production efficiency by unifying the molds.
can be obtained.

In the above embodiment, the torsion spring constant is reduced by reducing the inner diameter (rl) of the elastic body.

However, if there is room for the deflection rate, even if the inner diameter of the ring (20) (the outer diameter of the elastic body (1B)) is increased, the spring constant can be reduced in the same way as in this embodiment. be able to. In this case, the brake car (10, mold,
Pol) (17) can be made common.

[Effects of the Invention] According to the present invention, it is possible to improve the productivity of the joint that transmits the driving force of the elevator drive motor to the hoisting machine. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of a flexible joint of an elevator hoisting machine according to an embodiment of the present invention, FIG. A longitudinal sectional view of the elevator; FIG. 4 is a sectional view taken along line IV-17 in FIG. 3;
Figure 5 is a sectional view showing the challenge joint of the hoisting machine shown in Figure 4;
FIG. 6 is a right side view of this. (0 is the hoisting machine, (12) is the drive motor, (1B) is the flexible joint, (17) is the connecting bolt, (17a) is the flange part, (19) is the elasticity. - or a corresponding portion.

Claims (2)

[Claims] (1) In a flexible joint of an elevator hoisting machine that is interposed between an elevator drive motor and a hoisting machine and transmits the rotational driving force of the drive motor, the above-mentioned flexible joint is equipped with an elastic body having a predetermined reference outer diameter. The shank of the connecting bolt is formed to have a smaller diameter than other shank parts, and the diameter of the small shank is adjusted with respect to the reference outer diameter of the elastic body in accordance with the torsional spring constant of the elastic body. A flexible joint for an elevator hoist. (2) A flexible joint for an elevator hoist, characterized in that a flange portion is formed on the end face of the elastic body mounting portion of the connecting bolt.