JPS59226752A - Reduction unit of elevator - Google Patents

Abstract

PURPOSE:To prevent torque from not being transmitted, by providing a pushing body having a configuration memory effect. CONSTITUTION:When a pushing body 7l is heated by a burner or the like, the pushing body 7l is inclined to restore its original configuration. On the other hand, since a third roller 7j is brought in contact with an outer ring 7d, a pressing force is produced between the third roller 7j and the outer ring 7d, and a pressing force is also produced between a second roller 7e and a first roller 7c so that the torque can be transmitted. If the rolling surfaces of the rollers 7j, 7e, 7c, etc. are abraded, since a force is present at all times in the pushing body 7l such that it is inclined to restore its original configuration, the pressing force would not decrease.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a speed reduction device used in an elevator hoist. A hoist driven by an electric motor is installed in an elevator machine room. As shown in Japanese Utility Model Application No. 140850, for example, a reduction gear device for a hoisting machine has been proposed in which rollers contact each other on their circumferential surfaces and are pressed against each other to transmit power. ing. This will be explained with reference to FIGS. 1 to 4.

In the figure, (1) is the elevator hoistway, and (2) is the hoistway (
1) Machine room installed above, (3) is machine room (2)
(4) is a base supported on the machine base (3) via anti-vibration rubber (5), (6) is installed on the base (4). (6a) is the output shaft of the motor (6), ('7a) is the main body of the reducer (7), (7b) is the cover, ('i
'c) is the 10th roller consisting of a sun roller press-fitted into the input shaft (6a), (7d) is a cylindrical outer ring press-fitted into the main body (7a), and (7e) is the outer ring ()d. ), the 20th roller consisting of three cylindrical planetary rollers inscribed in ("f"
) is a shaft that rotatably supports the 20th-ra (!e), (7
g) is a holder to which the shaft (7f) is fixed; (7h) is an output shaft fixed to the holder (7g) and supported by a bearing (i) provided in the main body (7a); (8) is a drive sheave connected to the output shaft (mah), (9) is a deflection sheave attached to the base (4), (II is a sheave (8) and a deflection sheave (9)
The main ropes (b) and (2) wound around the main rope (0) are a heel and a counterbalance, respectively, which are connected to the ends of the main rope (0) and placed in the hoistway (1).

That is, the rotational torque of the input shaft (6a) due to the drive of the electric motor (6) is transmitted to the 20th la (7e) by the friction of the pressing force due to the elastic deformation of the 10th la (maC).

As a result, the 20th ring (7e) rotates along the inner periphery of the outer ring (7d) while rotating itself. That is, the second
The 0-la (7e) rotates and the 10th-la ('7c)
). This decelerated revolution component is transmitted to the output shaft (7h) via the holder (7g).

By the rotation of the output shaft (7h), the sheave (8) is driven, and the car αη and the sheave (a) are raised and lowered relative to each other via the main rope a.

Transmission of the torque of this reducer (7) is achieved by friction due to the pressure contact force between the 10th-ra (7CH + 20th-ra (]e) and the outer ring (7d) under the intervention of friction-enhancing oil. Normally, the pressure contact force is applied by an "interference fit" such as cooling the input shaft (6a), but a cooling device is required to cool the input shaft (6a) when assembling the reducer (force). Further, it requires waiting time for cooling, and the assembly work is troublesome.

In addition, if this reducer is operated for a long time, the transfer surfaces of the first roller (7 (!)), the 20th roller (7e), and the outer ring (7d) will wear out. This invention aims to improve the above-mentioned problems, and is made of a material with shape memory effect. By providing a suppressor that presses the 20th roller toward the 10th roller, it is possible to prevent the inability to transmit torque due to a reduction in the pressing force between the rollers, and to expect smooth power transmission over a long period of time. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 5 to 9.

In the figure, (7e) is a shaft ('i) fixed to the holder (7g).
The 20th la (7j) rotatably supported by the 20th la (7e) and the outer ring (7d
), and is rotatably supported on the shaft (7k). The suppressor is made of an alloy having a martensitic transformation point and connects the shaft (7f) and shaft (7k).

Other than the above, it is the same as in FIGS. 1 to 4.

That is, the 20th la (7e) and the 30th la (7j) are connected by the pressing body (71), but the pressing body (71)
) has a so-called shape memory effect that it remembers its initial shape and returns to its initial shape when heated even if it is deformed at room temperature.

As shown in FIG. 7, the suppressor (71) initially
The outer circumference of 0-ra (7j) is aligned with the inner circumference line (7
da). Next, as shown in FIG. 8 during assembly, if the suppressor (71) is deformed, a gap will be created between the outer ring (7d) and the 30th ring (7j), allowing easy assembly. The suppressor in the state shown in Figure 8 (
'71) is heated with a burner or the like, the pressing body (71) tries to return to its initial shape. However, the 30th-La (7
Since the outer ring (7d) comes into contact with the suppressor (71), the shape of the suppressor (71) does not return completely as shown in FIG. Therefore, a pressure contact force is generated between the 30th ring (7j) and the outer ring (1d), and the 20th ring (7e) and the 10th ring (7C
) is also applied, making it possible to transmit torque. Also, outer ring (7d) I each roller (', + ) + (T
Even if the transfer surfaces such as le) and ('lc) are worn, a force that tries to return to the initial shape is always acting on the suppressor (71), so the pressure contact force decreases in accordance with the amount of wear. This does not occur, and stable torque transmission is possible.

As explained above, in this invention, the 10th roller is connected to the input shaft to which the hoisting motor of the elevator is connected, and the 20th roller is connected to the output shaft to which the drive sheave is connected, and these rollers are connected to each other. At the same time, the 20th-ra is always connected to the 10th-
This allows the suppressor to be deformed during assembly, eliminating the need for a cooling device and simplifying assembly work. Also,
Since a pressing force is generated after assembly, it is possible to prevent the inability to transmit torque due to a decrease in the pressing force between the rows 2, and to continue smooth power transmission for a long period of time.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the elevator hoistway and machine room, Figure 2 is a left side view of the hoisting machine part of Figure 1, and Figure 3 is the deceleration of Figure 2 showing a conventional elevator speed reduction device. 4 is a sectional view taken along the line RI-W in FIG. 3, and FIG. 5 is a longitudinal sectional view showing one embodiment of an elevator speed reduction device according to the present invention. The figure is a view seen from the left side with the cover of FIG. 6 removed, and FIGS. (6)...Hoisting motor, (6a)...Input shaft, (force/
...Reducer, ('7c) - 1st roller, (7e) = 20th roller, (7h) ... Output shaft, (71) ... Pressing body, (8) ... Drive sheave , aO)...main rope, (b)
. . . At the base of the elevator, the same reference numerals in the drawings indicate the same or Buddhist priest parts. Figure 1 Figure 3 Figure 4 Figure 5 Figure 61'if

Claims (1)

[Claims] A hoisting motor was connected to the input shaft, a driving sheave for driving the main rope connected to the car was connected to the output shaft, and a 10th wheel connected to the input shaft was connected to the output shaft. The 20th-ra is in pressure contact with each other on their circumferential surfaces, thereby transmitting the power of the input shaft to the output shaft by frictional force, wherein the 20th-ra is engaged with the 20th-ra. An elevator deceleration device 0 characterized in that it is provided with a pressing body that is formed of a material having a shape memory effect and that constantly presses the 20th-ra toward the 10th-ra.