JP2000007255A - Elevator winch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the separation of a rotary shaft of a winch from a motor and prevent the friction between the rotary shaft and a motor shaft when a friction tightening tool is used by tightening the rotary shaft and a hollow shaft by a tightening tool generating a friction force due to the inflation of an inner ring and an outer ring due to taper. SOLUTION: A rotary shaft 3 and a hollow shaft 4a fixing a rotor of an electric motor 4 are tightened by a tightening tool 5 generating a friction force due to the inflation of an inner ring and an outer ring due to taper by tightening a plurality of bolts. Moreover, a bush 6 for preventing the friction between the rotary shaft 3 and a motor shaft due to eccentric load of the motor is provided at a motor shaft end in which the rotary shaft 3 attached to a bearing 2 fixed on a base 1 and the hollow electric motor 4 are fitted by a friction tightening tool 5. Consequently, it is possible to prevent the friction between the rotary shaft 3 and the hollow shaft of the electric motor 4 by the bush 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoist for raising and lowering an elevator, and more particularly to a motor mounting structure used for an elevator hoist.

[0002]

2. Description of the Related Art As shown in FIGS. 3 to 5, a conventional structure comprises a rotating shaft 3 mounted on a bearing 2 fixed to a base 1. FIG.
And the electric motor 4 are directly coupled by coupling coupling, shrink fitting, or taper.

[0003]

The conventional coupling with a coupling has a problem that in the case of a gearless hoist having no speed reducer, the shaft torque increases and the diameter of the coupling increases.

In addition, shrink-fit fastening has a problem that it is very difficult to separate the rotating shaft 3 and the motor 4, and taper fastening has a difficulty in tapering.

[0005]

The elevator hoist according to claim 1 of the present invention comprises a plurality of hollow shafts 4a for fixing the rotating shaft 3 and the rotor of the electric motor 4 as shown in FIG. By tightening the bolts, the inner ring and the outer ring are swelled by the taper and fastened by the fastener 5 which generates a frictional force. An elevator hoist according to a second aspect of the present invention is the first aspect of the present invention.
A bush 6 for preventing abrasion due to contact between the rotating shaft 3 and the electric motor 4 in fastening with the fastener 5 shown in FIG.

That is, according to the present invention, the rotating shaft 3 shown in FIG.
And the rotating shaft 4a of the electric motor 4 can be easily separated.
In addition, machining of the rotating shaft 4a is easier than in the case of taper fastening.

Further, the bush 6 prevents the rotating shaft 3 and the rotating shaft 4a of the electric motor 4 from being worn.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.

First, in FIG. 1, the hoist is a base 1,
A bearing fixed to the base 1, a shaft rotatably mounted to the bearing 3, a sheave integrally mounted on the shaft 3 between the bearings 7, and a sheave 7 for the sheave 8. A brake plate, a brake device of 9, a friction fastener of 5, a bush of 6, and the like.

The hollow shaft 4a, which fixes the rotating shaft 3 and the rotor of the electric motor 4, is fastened with a fastener 5 which tightens a plurality of bolts so that the inner ring and the outer ring bulge due to taper and a frictional force is generated.

Wear of the rotating shaft 3 and the motor shaft due to the unbalanced load of the motor is applied to the motor shaft end where the rotating shaft 3 attached to the bearing 2 fixed to the base 1 and the hollow electric motor 4 are fitted by the friction fastener 5. A bush 6 is provided to prevent this. The bush prevents the rotating shaft 3 and the hollow shaft 4a of the electric motor 4 from being worn.

[0012]

According to the elevator hoist of the present invention, the rotating shaft of the hoist and the electric motor can be easily separated from each other, and wear of the rotating shaft and the electric motor shaft when the friction fastener is used can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an elevator hoist according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an elevator hoist according to an embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an elevator hoist having a conventional structure.

FIG. 4 is a schematic configuration diagram of an elevator hoist having a conventional structure.

FIG. 5 is a schematic configuration diagram of an elevator hoist having a conventional structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Bearing, 3 ... Rotary shaft, 4 ... Electric motor, 5 ...
Fastener, 6 bush, 7 sheave, 8 brake plate, 9
... brake device.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiromi Iyoda 1070 Ma, Hitachinaka-shi, Ibaraki F-term in Mito Plant, Hitachi, Ltd. F-term (reference) 3F305 BC15 3F306 AA02 BA07 BA08 BA11

Claims (2)

[Claims] 1. A shaft rotatably mounted via a pair of bearings mounted and fixed to a base, a sheave integrally mounted on the shaft, an electric motor for rotationally driving the sheave, and a motor for rotating the sheave. An elevator hoist equipped with a brake device for braking the rotation, wherein a rotary shaft mounted on a bearing fixed to a base and a hollow electric motor are fitted with a frictional fastener. . 2. A shaft rotatably mounted via a pair of bearings fixed to a base, a sheave integrally mounted on the shaft, an electric motor for rotating and driving the sheave, and In an elevator hoist equipped with a brake device that applies braking to rotation, an offset load of the motor is applied to a rotating shaft attached to a bearing fixed to a base and a motor shaft end in which a hollow electric motor is fitted with a frictional fastener. An elevator hoist comprising a bush for preventing abrasion of a rotating shaft and a motor shaft caused by the motor.