CN110475739B - Traction machine and elevator - Google Patents

Abstract

The invention provides an elevator capable of reducing the axial size of a tractor. In an elevator having a housing (2) that can be fixed to an equipment base (7), a main shaft (3) having one end supported by the housing (2) via a bearing, a sheave (4) that is attached to the main shaft (3) and around which a main wire rope (8) can be wound, and a bracket (5) that is fixed to the equipment base (7) and supports the other end of the main shaft (3) via another bearing, the lateral width (W1) of the bracket (5) is smaller than the outer diameter (W2) of the sheave (4), and a leg (14) of the bracket (5) is disposed between a groove portion on the sheave (4) around which the main wire rope (8) is wound and the equipment base (7).

Description

Traction machine and elevator

Technical Field

The present invention relates to a hoisting machine and an elevator.

Background

An elevator performs raising and lowering of a car in a hoistway by winding or rewinding a rope connected to the car with a hoisting machine.

For example, patent document 1 discloses a hoist having such a configuration. Patent document 1 describes "a bearing 20 and a bearing base 21 for supporting the bearing 20 are provided at the other end of the sheave shaft 15" and "the brake device 22 is disposed on the outer periphery of the rope-less groove 58 on the side of the bearing base 21 with respect to the center of the sheave 5 and supported by the upper portion of the bearing base 21".

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 61-203086

Disclosure of Invention

Problems to be solved by the invention

However, in the structure of the hoisting machine described in patent document 1, the bracket and the equipment base are designed with a relatively large margin because the hoisting machine is not affected by the rope, but there is a problem that the dimension of the hoisting machine in the axial direction increases.

The invention aims to provide a traction machine and an elevator, which can reduce the axial size of the traction machine.

Means for solving the problems

In order to solve the above problems and achieve the object of the present invention, the present invention is a hoisting machine including: a housing fixed to the equipment base; a main shaft having one end supported by the housing via a bearing; a sheave mounted on the main shaft, the sheave being capable of winding a main wire rope; and a bracket fixed on the equipment base and supporting the other end of the main shaft through other bearings, wherein the transverse width dimension of the bracket is smaller than the outer diameter of the rope wheel, and the bracket is provided with a foot part for supporting the bracket; the leg portion is disposed between the groove portion around which the main wire rope is wound on the sheave and the device base.

Effects of the invention

According to the elevator with the structure, the axial size of the tractor can be reduced.

Problems, structures, and effects other than those described above will be described with reference to the following embodiments.

Drawings

Fig. 1 is a schematic diagram of an elevator in which the present invention is mounted.

Fig. 2 is a side view of an elevator hoisting machine according to a first embodiment of the present invention.

Fig. 3 is a front view of the traction machine shown in fig. 1.

Fig. 4 is a side view of an elevator hoisting machine according to a second embodiment of the present invention.

Fig. 5 is a front view of the traction machine shown in fig. 4.

Detailed Description

Hereinafter, an embodiment will be described with reference to fig. 1 to 5. In the drawings, the same or similar components are denoted by the same reference numerals, and repeated description thereof is omitted.

Example 1

An embodiment of the present invention will be described below with reference to fig. 1, 2, and 3.

Fig. 1 is a schematic diagram of an elevator in which the present invention is mounted. The elevator of fig. 1 comprises: a car 11 that can be raised and lowered in a hoistway 13 of a building, a main rope 8 having one end connected to the car 11, a counterweight 12 connected to the other end of the main rope 8, and a hoisting machine 1 that is provided in a machine room 10 and winds up the main rope 8.

Fig. 2 is a side view of an elevator hoisting machine according to a first embodiment of the present invention. Fig. 3 is a front view of the traction machine shown in fig. 1.

The hoisting machine 1 of the elevator of the present embodiment includes, for example, a housing 2, a main shaft 3, a sheave 4, a bracket 5, and a brake 6.

The casing 2 is fixed to an equipment base 7 placed on a floor surface constituting the machine room 10, and is provided with a motor, not shown. One end of the main shaft 3 is rotatably attached to a motor, and when the motor is driven, the main shaft 3 rotates, and the sheave 4 rotates in conjunction with the rotation of the main shaft 3.

One end of the main shaft 3 is supported by the housing 2 via a bearing, not shown, and is driven by a motor.

The sheave 4 is formed in a cylindrical shape, and a through hole, not shown, is formed in the center of the shaft thereof. The diameter of the through hole is substantially equal to the outer diameter of the main shaft 3, and the main shaft 3 is fixed to the sheave 4 by passing through the through hole of the sheave 4. Further, a plurality of main ropes 8 are wound around the side surface portion of the sheave 4.

The bracket 5 is fixed to the device base 7, and supports the other end of the spindle 3 via a bearing, not shown.

The brake 6 is supported by the housing 2, and brakes a disk brake, not shown, that rotates in conjunction with the sheave 4.

The elevator according to the present embodiment is improved to reduce the size of the hoisting machine in the axial direction. Specifically, the lateral width W1 of the bracket 5 is set smaller than the outer diameter W2 of the sheave 4. In addition, the leg 14 as a part of the bracket 5 is disposed so as to overlap the projected area of the sheave 4. That is, the leg portion 14 is disposed between the groove portion around which the main rope 8 is wound on the sheave 4 and the equipment base 7. With such a configuration, the bracket 5 can be positioned closer to the housing 2 than in the conventional case, and interference between the bracket 5 and the main rope 8 extending from the sheave 4 can be prevented.

In the elevator configured as described above, the main rope 8 connected to the car is wound up or rewound by the hoisting machine 1, whereby the car is raised or lowered in the hoistway 13. That is, when an operation command is given to the motor constituting the hoisting machine 1 by the control device, the motor is driven to rotate the main shaft 3.

The sheave 4 rotates in conjunction with the rotation of the main shaft 3, and the main wire rope 8 suspended from the sheave 4 moves in the rotation direction of the sheave 4 due to friction between the main wire rope 8 and the sheave 4 at that time. Then, the car and the counterweight move in opposite directions to each other in the up-down direction in accordance with the movement of the main rope 8.

At this time, a control drive current is applied from the control device to the brake 6, and the internal electromagnetic coil is excited, so that the brake disk is in a free state. On the other hand, when the control drive current of the brake 6 is cut off, the electromagnetic coil is demagnetized, and the braking force acts on the brake disk by a brake spring not shown.

Further, the lateral width W1 of the bracket 5 is smaller than the outer diameter W2 of the sheave 4, and the leg portion 14 supporting the bracket 5 is disposed between the groove portion of the sheave 4 and the equipment base 7.

According to the above configuration, the bracket 5 can be located closer to the casing 2 than in the conventional case, and the size of the hoisting machine in the axial direction can be reduced, thereby saving space.

Further, the leg portion 14 is positioned on the case 2 side, whereby the strength of the bracket 5 can be increased. Therefore, the bracket having a shorter width in the axial direction than the conventional bracket can be used, and the axial dimension of the entire hoisting machine can be shortened.

Example 2

Next, a second embodiment of the present invention will be described with reference to fig. 4 and 5.

Fig. 4 is a side view of an elevator hoisting machine according to a second embodiment of the present invention, and fig. 5 is a front view of the hoisting machine shown in fig. 4.

In the first embodiment, the main wire rope 8 wound around the sheave 4 is extended directly downward, and in the second embodiment, one end of the main wire rope 8 extended from the sheave 4 is connected to the upper end of the counterweight 12 via the guide sheave 9, and the other end is connected to the upper end of the car 11.

With such a structure, a bending moment acts on the bracket 5. In order to cope with such a bending moment, the second embodiment is modified.

Specifically, the device base 7 has a raised portion 7a having a height higher than a surface to which the housing 2 is fixed, and the stand 5A having a height dimension lower than that of the stand 5 described in the first embodiment is disposed on the raised portion 7 a.

In the elevator including the guide sheave 9, the force F1 acts vertically downward on the other end side of the main wire rope 8 connected to the car 11, and the force F2 acts obliquely on the one end side of the main wire rope 8 connected to the counterweight 12, so that the oblique force F is applied to the bracket 5A.

The bending moment M applied to the stent 5A is expressed by a formula of M ═ F × L, and is related to the height dimension of the stent 5A.

Accordingly, the height L1 of the bracket 5A shown in the other embodiment is made smaller than the height L2 of the bracket 5 shown in the above embodiment, and the bending moment M applied to the bracket 5A is reduced to relatively improve the strength. On the other hand, in order to compensate for the height of the lowered holder 5A, a part of the equipment base 7 is raised, and the holder 5A is disposed on the raised part 7 a.

According to the above configuration, by raising a part of the apparatus base 7 and disposing the rack 5A on the raised part 7a, the height L1 of the rack 5A can be reduced, and the necessary strength required for the rack 5A can be secured with a simple configuration.

Further, since the strength can be improved, a bracket having a shorter width in the axial direction than the conventional one can be used, and the axial dimension of the entire hoisting machine can be shortened.

The brake 6 of the present invention is arranged on the side of the housing 2 with respect to the sheave 4, but may be arranged on the side of the brackets 5 and 5A.

The brake 6 is not limited to the disc brake described in the present invention, and may be a drum brake, and may be disposed on either the housing 2 side or the bracket 5, 5A side in the same manner as described above.

The above description has been made of the hoist and elevator embodiments of the present invention, including the operational effects thereof.

However, the present invention is not limited to the above-described embodiments, and various modifications are possible. For example, the above-described embodiments are described in detail to explain the present invention easily and understandably, and are not limited to having all the structures described. Further, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. In addition, other configurations can be added, deleted, and replaced for a part of the configurations of the embodiments.

Description of the reference numerals

1 traction machine

2 casing

3 spindle

4 rope wheel

5, 5A stent

6 brake

7 Equipment base

7a heightening part

8 main steel wire rope

9 guide wheel

10 machine room

11 cage

12 counterweight

13 well

14 feet.

Claims (3)

1. A traction machine, comprising:

a housing securable to the equipment base;

a main shaft having one end supported by the housing via a bearing;

a sheave mounted on the main shaft, the sheave being capable of winding a main wire rope; and

a bracket fixed to the equipment base and supporting the other end of the main shaft via another bearing,

the bracket has a lateral width dimension smaller than an outer diameter of the sheave,

the bracket having a foot for supporting the bracket, the foot being part of the bracket,

the leg portion is disposed between a groove portion on the sheave around which the main wire rope is wound and the equipment base,

the apparatus base has an elevated portion having a height higher than a surface for fixing the housing,

the bracket is fixed on the elevated part.

2. The hoisting machine as set forth in claim 1, wherein:

the main steel wire rope is guided by the guide wheel.

3. An elevator, characterized by comprising:

a car that can be raised and lowered in a hoistway;

a main wire rope, one end of which is connected to the car;

a counterweight connected to the other end of the main wire rope;

a hoist provided in the machine room, the hoist being capable of winding up the main wire rope; and

an equipment base provided in the machine room, capable of fixing the traction machine,

the traction machine includes:

a housing fixed to the equipment base;

a main shaft having one end supported by the housing via a bearing;

a sheave mounted on the main shaft, the sheave being capable of winding the main wire rope; and

a bracket fixed to the equipment base and supporting the other end of the main shaft via another bearing,

the bracket has a lateral width dimension smaller than an outer diameter of the sheave,

the bracket having a foot for supporting the bracket, the foot being part of the bracket,

the leg portion is disposed between a groove portion on the sheave around which the main wire rope is wound and the equipment base,

the apparatus base has an elevated portion having a height higher than a surface for fixing the housing,

the bracket is fixed on the elevated part.

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