CN110475739A - Traction machine and elevator - Google Patents

Abstract

The present invention provide it is a kind of can reduce machine shaft to size elevator.The shell (2) on plant bottom case (7) is capable of fixing having, one end is supported in the main shaft (3) of shell (2) via bearing, the rope sheave (4) that can wind main rope (8) being mounted on main shaft (3), and it is fixed on plant bottom case (7) and via in the elevator of the bracket (5) of the other end of other bearing supporting spindles (3), the transverse width dimension (W1) of bracket (5) is smaller than the outer diameter (W2) of rope sheave (4), and the foot (14) of bracket (5) configures between the groove portion and plant bottom case (7) of the winding main rope (8) on rope sheave (4).

Description

Traction machines and elevators

technical field

The invention relates to traction machines and elevators.

Background technique

The elevator uses the traction machine to wind up or rewind the rope connected to the car, so that the car is raised or lowered in the hoistway.

Regarding a traction machine having such a structure, Patent Document 1 is known, for example. Patent Document 1 states that "a bearing 20 and a bearing stand 21 supporting the bearing 20 are provided at the other end of the sheave shaft 15", and that "the braking device 22 is arranged on the side of the bearing stand 21 compared to the center of the sheave 5." The outer periphery of the cable groove 58 is supported by the upper part of the bearing stand 21".

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 61-203086

Contents of the invention

The problem to be solved by the invention

However, in the structure of the traction machine described in Patent Document 1, because it is not affected by the cables, there is a relatively large margin in the design of the bracket and the equipment base, but on the other hand, there is a gap in the axial direction of the traction machine. The issue of size increase.

An object of the present invention is to provide a traction machine and an elevator capable of reducing the size of the traction machine in the axial direction.

Technical solutions for solving problems

In order to solve the above-mentioned problems and achieve the purpose of the present invention, the present invention is a traction machine, which includes: a housing fixed on the equipment base; a main shaft, one end of which is supported by the housing through a bearing; A sheave on the top, which can wind the main steel wire rope; and a bracket fixed on the base of the equipment, which supports the other end of the main shaft via other bearings, and the transverse width dimension of the bracket is smaller than the outer diameter of the sheave , the support has a foot supporting the support; the foot is disposed between the groove of the sheave where the main wire rope is wound and the equipment base.

Invention effect

According to the elevator constructed as described above, it is possible to reduce the size of the hoisting machine in the axial direction.

In addition, the problems, configurations, and effects other than those described above will be explained through the description of the following embodiments.

Description of drawings

Fig. 1 is a schematic diagram of an elevator equipped with the present invention.

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

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

Detailed ways

Hereinafter, an embodiment will be described with reference to FIGS. 1 to 5 . However, the same reference numerals are assigned to the same or similar structures in each figure, and repeated descriptions are omitted.

Example 1

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1 , FIG. 2 , and FIG. 3 .

Fig. 1 is a schematic diagram of an elevator equipped with the present invention. The elevator of Fig. 1 comprises: the car 11 that can go up and down in the hoistway 13 of building, the main wire rope 8 that one end is connected with car 11, the counterweight 12 that connects the other end of main wire rope 8 and be arranged on machine room 10 The traction machine 1 that winds up the main wire rope 8.

Fig. 2 is a side view of the hoisting machine of the elevator according to the 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 this embodiment has a housing 2, a main shaft 3, a sheave 4, a bracket 5, and a brake 6, for example.

In addition, the casing 2 is fixed to an equipment base 7 placed on the floor surface constituting the machine room 10 , and a motor not shown is provided thereon. One end of the main shaft 3 is rotatably mounted on the motor. 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. The diameter of the through hole is substantially equal to the outer diameter of the main shaft 3 , and the main shaft 3 passes through the through hole of the sheave 4 and is fixed to the sheave 4 . In addition, a plurality of main wire ropes 8 are wound around the side surface of the sheave 4 .

The bracket 5 is fixed to the equipment base 7 and supports the other end of the main shaft 3 via a bearing not shown.

The brake 6 is supported by the housing 2 and brakes a disc brake (not shown) which rotates in conjunction with the sheave 4 .

Furthermore, the elevator of the present embodiment has been improved in order to reduce the size of the hoisting machine in the axial direction. Specifically, the lateral width dimension W1 of the bracket 5 is set to be smaller than the outer diameter W2 of the sheave 4 . In addition, the projection area of the leg part 14 which is a part of the bracket 5 and the sheave 4 overlaps with the arrangement|positioning. That is, the leg portion 14 is arranged between the groove portion of the sheave 4 around which the main wire rope 8 is wound, and the equipment base 7 . By adopting such a structure, the bracket 5 can be brought closer to the case 2 side than conventional ones, and the interference between the bracket 5 and the main wire rope 8 extending from the sheave 4 can be prevented.

In the elevator thus constituted, the hoistway 13 lifts or descends the car by winding up or rewinding the main rope 8 connected to the car by the hoisting machine 1 . That is, when an operation command is given to the electric motor constituting the hoisting machine 1 from the control device, the electric 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 on the sheave 4 moves in the direction of rotation of the sheave 4 due to the friction between the main wire rope 8 and the sheave 4 at this time. Then, along with the movement of the main wire rope 8, the car and the counterweight move up and down in opposite directions to each other.

At this time, a control drive current is supplied to the brake 6 from the control device to excite the internal electromagnetic coil, and the brake disc is brought into 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 disc through a brake spring not shown.

Furthermore, the lateral width dimension 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 arranged between the groove portion of the sheave 4 and the equipment base 7.

According to the above configuration, the bracket 5 can be brought closer to the case 2 side than conventional ones, so that the dimension in the axial direction of the hoisting machine can be reduced and space saving can be realized.

Furthermore, the leg portion 14 is located on the side of the housing 2 , thereby increasing the strength of the bracket 5 . Therefore, it is possible to use a bracket having a shorter axial width dimension than conventional ones, and it is possible to shorten the axial dimension of the entire hoisting machine.

Example 2

Next, a second embodiment of the present invention will be described using FIG. 4 and FIG. 5 .

Fig. 4 is a side view of a hoisting machine for an elevator 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 on the sheave 4 is described as an example extending directly downward. The upper end of weight 12 is connected, and the other end is connected with the upper end of car 11.

In the case of such a structure, a bending moment acts on the bracket 5 . In order to cope with such a bending moment, the second embodiment has been improved.

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

In an elevator equipped with guide wheels 9, on the other end side of the main wire rope 8 connected to the car 11, the force F1 acts directly downward, and on the one end side of the main wire rope 8 connected to the counterweight 12, the force F2 Acting obliquely, an oblique force F is thus exerted on the bracket 5A.

Furthermore, the bending moment M applied to the bracket 5A is related to the height dimension of the bracket 5A as expressed by the formula M=F×L.

Therefore, the height dimension L1 of the bracket 5A shown in other embodiments is made smaller than the height dimension L2 of the bracket 5 shown in the above-mentioned embodiment, the bending moment M applied to the bracket 5A is reduced, and the strength is relatively improved. . On the other hand, in order to compensate for the reduced height of the stand 5A, a part of the equipment base 7 is raised, and the stand 5A is disposed on the raised portion 7a.

According to the above structure, a part of the equipment base 7 is raised, and the bracket 5A is arranged on the raised portion 7a, thereby reducing the height dimension L1 of the bracket 5A, and ensuring the necessary strength required for the bracket 5A with a simple structure.

Furthermore, since the strength can be improved, it is possible to use a bracket having a shorter axial width dimension than conventional ones, and it is possible to shorten the axial dimension of the entire hoisting machine.

In addition, in the brake 6 in the present invention, the brake disc is disposed on the housing 2 side with respect to the sheave 4 , but it may also be disposed on the bracket 5 , 5A side.

In addition, the brake 6 is not limited to the disc brake described in the present invention, and the same applies to the drum brake, and may be arranged on either the housing 2 side or the bracket 5, 5A side as described above.

As mentioned above, the embodiment of the hoisting machine and elevator of this invention was demonstrated also including the operation and effect.

However, the present invention is not limited to the above-described embodiments, and various modifications are included. For example, the above-mentioned embodiments have been described in detail for the purpose of explaining the present invention in an easy-to-understand manner, and are not limited to having all the configurations described. In addition, a part of the structure of a certain Example can be replaced with the structure of another Example, and the structure of another Example can also be added to the structure of a certain Example. In addition, other configurations can be added, deleted, or substituted for part of the configurations of the respective embodiments.

Explanation of reference signs

1 traction machine

2 housing

3 spindles

4 sheaves

5, 5A bracket

6 brakes

7 Device base

7a Elevation

8 main wire rope

9 guide wheels

10 Mechanical room

11 car

12 counterweights

13 shaft

14 feet.

Claims (4)

1. a kind of traction machine characterized by comprising

It is capable of fixing the shell on plant bottom case；

Main shaft, one end are supported on the shell via bearing；

The rope sheave being mounted on the main shaft can wind main rope；With

The bracket being fixed on the plant bottom case supports the other end of the main shaft via other bearings,

The transverse width dimension of the bracket is less than the outer diameter of the rope sheave,

The bracket has the foot for supporting the bracket,

Foot's configuration is between the groove portion and the plant bottom case of the winding main rope on the rope sheave.

2. traction machine as described in claim 1, it is characterised in that:

The plant bottom case increases portion with highly higher than the face for fixing the shell,

The bracket is fixed on described increase in portion.

3. traction machine as claimed in claim 2, it is characterised in that:

The main rope is directed to wheel guiding.

4. a kind of elevator characterized by comprising

The carriage that can be gone up and down in hoistway；

Main rope, one end are connect with the carriage；

The counterweight being connect with the other end of the main rope；

Traction machine in Machine Room is set, the main rope can be rolled；With

Plant bottom case in the Machine Room is set, the traction machine is capable of fixing,

The traction machine includes:

The shell being fixed on plant bottom case；

Main shaft, one end are supported on the shell via bearing；

The rope sheave being mounted on the main shaft can wind the main rope；With

The bracket being fixed on the plant bottom case supports the other end of the main shaft via other bearings,

The transverse width dimension of the bracket is less than the outer diameter of the rope sheave,

The bracket has the foot for supporting the bracket,

Foot's configuration is between the groove portion and the plant bottom case of the winding main rope on the rope sheave.