JPH0735234B2 - Hoisting machine for elevator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an elevator hoisting machine, and more particularly to an elevator hoisting machine using parallel shaft gears.

[Background of the Invention]

As an elevator hoisting machine for driving an elevator car, which employs a parallel shaft gear as a speed reducer, there is known one disclosed in, for example, JP-A-59-86586.

The structure of the elevator hoisting machine described in the above publication is
Shown in Figures and 6.

In the figure, 1 is an elevator hoistway, 2 is a machine room provided above the hoistway 1, 2a is a floor of the machine room 2, 3 is a support stand fixed to the floor 2a, and 4 is a support stand 3 The machine stand that was abandoned by
5 is a base supported on the machine base 4 via a rubber cushion 6, 7 is an electric motor installed on the base 5, 8 is a speed reducer installed on the base 5, and 8A is An input shaft 8B having an extended shaft of the electric motor 7 is a first gear which is a helical gear fixed to the input shaft A, and meshes with a second gear 8D fixed to the output shaft 8F. 9 is a drive sheave fixed to the output shaft 8F, 10
Is a deflector wheel support beam fixed to the machine base 4, 11 is a shaft whose both ends are supported by the deflector wheel support beam 10, 12 is a deflector wheel pivotally attached to the shaft 11, 13 is a sheave 9 and a deflector wheel 12. The main rope is wound around, one end of which is connected to a car and the other end of which is connected to a counterweight. Although not shown, a brake for stopping and holding the car is provided on the input shaft 8A of the speed reducer 7.

[Problems to be solved by the invention]

However, in the above-mentioned elevator hoisting machine, since the brake for stopping and holding the car is provided on the shaft of the electric motor, sometimes the impact force generated at the time of emergency stop is applied to the high-speed elevator. This will have a great effect on the gears, including the inertial force of the sheave. Therefore, the load on the gears becomes excessive and the safety is reduced.

Further, the sheave and the second gear are fixed to the output shaft, and both ends are supported by bearings, respectively. However, since the support interval is large, the deflection affects the meshing state of the gears, resulting in noise. Has a tendency to become large, and in order to prevent this, it is necessary to considerably increase the shaft diameter.

An object of the present invention is to provide an elevator hoisting machine that secures the safety and reliability of the elevator system, and is small and lightweight.

[Means for solving problems]

In order to achieve such an object, the present invention is an elevator in which an electric motor is connected to an input shaft of a parallel shaft gear reducer having a small gear and a large gear built therein, and an output shaft is connected to a sheave and a braking drum of a brake, respectively. In a hoisting machine, bearings are provided on both sides of the sheave and braking drum of the output shaft, and a large gear of the parallel shaft gear reducer is cantilever-supported on an output shaft that penetrates the bearing on the sheave side. It was done.

[Action]

By doing so, the electric motor, the speed reducer, and the braking device can be arranged close to each other, so that miniaturization can be achieved. Also, since the brake is installed on the output shaft side of the speed reducer, the impact force generated during an emergency stop in a high-speed elevator does not directly act on the gears, improving safety and reliability. be able to.

〔Example〕

1 and 2 are configuration diagrams showing an embodiment of an elevator hoisting machine according to the present invention. FIG. 1 is a front view and FIG. 2 is a plan view.

Reference numeral 7 is an electric motor, 8 is a speed reducer, 8A is an input shaft of the speed reducer 8 which is connected to the shaft of the electric motor 7 by couplings 7A and 7B, and 8B.
Is a first gear (small gear) which is a helical gear fixed to or integrally processed with the input shaft 8A, and the input shaft 8A is bearing-supported on both sides by the speed reducer 8. A second gear (large gear) 8D meshing with the first gear 8B, a drive sheave 9 and a brake drum 9A integrally formed with the sheave 9 are fixed to the output shaft 8F. Sheave 9
Is disposed on the opposite side of the electric motor 7 with the speed reducer 8 in between. The output shaft 8F has a bearing 15 at one end and a sheave 9 of the speed reducer 8 at the other end.
The bearing is supported toward. The second gear 8D is cantilevered toward the speed reducer 8 of the output shaft 8F, and meshes with the first gear 8B. Reference numeral 5 is a common base for fixing the electric motor 7, the speed reducer 8 and the bearing 15, and also supports the brake element 14 mounted using the bearing 15.

Here, in a high-speed elevator with an elevator speed of 240 m / min, it is possible to increase the rotation speed of the sheave by adopting the 2: 1 roping method with a pulley on the car side, 40 times the rope diameter of 12 mm, that is, 500 m
m, and the rotation speed is 1500 rpm to downsize the motor.
Then, the reduction ratio becomes 4.9, and the helical gear can perform one-step deceleration. In addition, even in elevators with a speed of less than 240 m / min, it is possible to reduce the speed by one step by controlling the rotation speed of the motor to a low level within the range that does not impair economic efficiency, such as by inverter control. It is more compact than deceleration, and is advantageous in terms of cost.

In this way, since the shaft of the electric motor 7 and the input shaft 8A are coupled by the couplings 7A and 7B, the coupling is made of a flexible type using rubber, for example, to isolate the vibration from the electric motor 7 and It is possible to easily take out the work.

Also, since the first gear 8B has bearings supported on both sides,
It is possible to stabilize the meshing state with the second gear 8D without being affected by the vibration from the electric motor 7.

Further, in the second gear 8D as well, the output shaft 8F is sufficiently strong (large diameter) against the load of the sheave 9 and the brake drum 9A and cantilevered in the vicinity of the bearing. Is small and can maintain low noise.

Further, by horizontally arranging the first gear 8B and the second gear 8D and dividing the case of the reduction gear 8 into upper and lower parts, the center distance of the gear can be minimized according to the size of the bearing, and the tooth contact can be reduced. Adjustment becomes easy.

The brake drum 9A is not arranged on the shaft of the electric motor 7, but the output shaft 8F of the speed reducer 8 is integrated with the sheave 9, so that the impact force generated at the time of emergency stop is directly applied to the gear. Even if the gear is damaged without any action, it becomes possible to stop and hold the sheave 9 and prevent the car or the counterweight from falling by the operation of the brake, which is safe and reliable. It is possible to improve the sex. Further, in terms of space, the brake is arranged on the side of the sheave 9, and the dimension between the speed reducer 8 and the shaft end of the electric motor 7 and the end of the sheave shaft (output shaft) 8F is measured. By making
As shown in FIG. 3, the hoistway 1 can be arranged at the center of the plane arrangement.

Further, as shown in FIG. 4, one of the supports 3a and 3b for supporting the hoisting machine and fixing it to the machine room floor 2a is provided from the center of the sheave 9 to the sheaves 16a and 16b of the car and the counterweight. The ends of the main ropes 13 by 2: 1 roping can be shared with the support base 3a by arranging them with the diameter dimension separated.

〔The invention's effect〕

As is clear from the above description, according to the elevator hoisting machine of the present invention, the reducer consisting of a pair of parallel shaft gears is the center, the input shaft side is the electric motor, and the output shaft side is the sheave and control unit. By arranging the motive, it becomes possible to make a compact, lightweight and compact arrangement. Further, since the brake is attached integrally with the sheave, the load on the gear is less than in the conventional case, and the safety and reliability are excellent.

[Brief description of drawings]

1 to 4 are configuration diagrams showing an embodiment of an elevator hoisting machine according to the present invention. FIG. 1 is a front view, FIG. 2 is a plan sectional view, and FIG. 3 is a hem plan view. , Fig. 4 is the third
FIGS. 5 and 6 are configuration diagrams showing an example of a conventional elevator hoisting machine, FIG. 5 is a longitudinal sectional view including a machine room, and FIG. 6 is a plan sectional view. 2a …… machine room floor, 3a, 3b …… support base, 7 …… motor, 8
...... Reduction gear, 9 …… sheave, 9A …… brake drum, 13 ……
Main rope.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiromasa Umagami 3-1-1, Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory (56) References JP-A-59-86586 (JP, A) Actual opening 57-151372 (JP, U) Actual opening 61-101577 (JP, U) Actual opening 60-61267 (JP, U)

Claims (1)

[Claims] 1. A hoisting machine for an elevator, wherein an input shaft of a parallel shaft gear reducer having a small gear and a large gear incorporated therein is connected to an electric motor, and an output shaft thereof is connected to a sheave and a braking drum of a brake, respectively.
Both sides of the output shaft sandwiching the sheave and the braking drum are supported by bearings, and the large gear of the parallel shaft gear reducer is cantilever-supported on the output shaft penetrating the bearing on the sheave side. Elevator hoisting machine.