JPS641334Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an elevator hoist having a reduction gear made of parallel shaft gears.

First, Figures 1 and 2 show the conventional elevator hoisting machine, namely Utility Application No. 55-76504
The elevator hoisting machine described in the patent application (filed on June 2, 2013) will be explained.

In the diagram, 1 is the elevator machine room, 2 is the machine room 1
2a is the input shaft of this reduction gear, and 2b is the input shaft of this reduction gear.
3 is an output shaft, 3 is a flange-shaped shaft joint that also serves as a brake wheel, and 4 is a protruding shaft 4 fastened to the speed reducer 2 with a bolt 4a.
b is an electric motor disposed facing the input shaft 2a; 5;
6 is a disc-shaped joint body provided at the protruding end of the shaft 4b and fastened to the shaft joint 3 by a bolt 5a; 6 is a joint body fixed to the output shaft 2b with its circumferential surface close to the middle part of the shaft 4b; A driving sheave is arranged, and 7 is the main rope wrapped around it, 8 is a cage suspended from one end of the main rope 7, and 9 is a counterweight suspended from the other end of the main rope 7. be.

That is, since the hoisting machine is generally installed in a narrow machine room 1, it is designed to be as small as possible, and the side surface of the drive sheave 6 and the end surface of the electric motor 4 are arranged in an overlapping state as shown in FIG. Therefore, when assembling or disassembling the hoisting machine, when attaching or detaching the electric motor 4 with the joint body 5 attached to the reduction gear 2, the joint body 5 hits the drive sheave 6, so the drive sheave 6 is removed. It was necessary to implement it. Therefore, electric motor 4
There was a problem that required extra effort and time to attach and detach.

This invention solves the above-mentioned drawbacks and aims to provide an elevator hoisting machine in which the electric motor can be easily attached to and detached from the reduction gear.

An embodiment of this invention will be described above with reference to FIGS. 3 and 4.

In the figure, the same reference numerals as those in Figures 1 and 2 indicate corresponding parts, and 5 is a joint body that is approximately rectangular plate-shaped and configured symmetrically with respect to the center of the shaft 4b as shown in Figure 4. , is a joint body in which the length of the extension from the center of the shaft 4b in the width direction is set to be smaller than the distance from the center of the shaft 4b to the outer periphery of the driving sheave 6.

That is, since the joint body 5 is formed into a rectangular plate shape, the bolts 5a of the joint body 5 are removed at the position where the long side thereof corresponds to the outer periphery of the drive sheave 6, and the bolts 4a of the electric motor 4 are removed. This allows the electric motor 4 to be removed from the reduction gear 2 with the drive sheave 6 still attached. Further, the electric motor 4 can be installed in a similar situation. Therefore, the electric motor 4 can be easily attached and detached during assembly and disassembly, and since the joint body 5 is symmetrical, it is possible to prevent problems caused by high-speed rotation, such as the input shaft 2a.
A hoisting machine with less vibration and damage to bearings such as the input shaft 2a can be obtained.

As explained above, in a hoisting machine in which the side surface of the drive sheave and the end surface of the electric motor are arranged in a superimposed state, the invention is based on a single shaft perpendicular to the axis of the joint body that connects the shaft of the electric motor to the input shaft of the reduction gear. The projecting dimension of the side from the center of the shaft is set smaller than the distance from the center of the shaft to the outer periphery of the driving sheave, and is configured symmetrically with respect to the center of the shaft. This allows the motor to be easily attached and detached while the drive sheave remains attached to the reduction gear, simplifying assembly and disassembly work, especially during maintenance work after elevator installation. This makes it possible to reduce operating costs, and because the joint body is symmetrical, it is possible to realize an elevator hoisting machine in which the input shaft and the like are less likely to be disturbed by high-speed rotation.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram of the main parts of an elevator system, Fig. 2 is a partially cross-sectional plan view of a conventional elevator hoisting machine, and Fig. 3 is an example of an elevator hoisting machine according to this invention. 2 is a view corresponding to FIG. 2, and FIG. 4 is a cross-sectional main part view taken along the line -- in FIG. 3. 2...Reduction device, 2a...Input shaft, 2b...Input shaft, 3...Shaft coupling, 4...Electric motor, 4b...
Shaft, 5...joint body, 6...driving sheave. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A speed reducer has a plurality of parallel shafts on which mutually meshing gears are mounted, and an input shaft end and an output shaft end are disposed protruding from the same side, and a reducer is mounted on the protruding part of the input shaft. a brake drum connected to the brake drum, an electric motor connected to the brake drum via a joint body and disposed opposite to each other at a predetermined interval on the side of the brake drum, and connected to the end of the output shaft and a peripheral edge thereof; and a drive sheave disposed so as to protrude into the space between the brake drum and the electric motor, and the joint body extends from the center of the input shaft on one side of the sheave arrangement side. The dimensions are
The distance from the center to the end of the driving sheave in the gap is smaller than the distance, and the overhang dimension of the one side opposite to the input shaft center from the one side is also the overhang dimension of the one side. A hoisting machine for an elevator, characterized in that it is the same as the following.