CN109205443B

CN109205443B - Hoist and elevator

Info

Publication number: CN109205443B
Application number: CN201810476808.5A
Authority: CN
Inventors: 山本洋嗣; 五十岚章智; 西野义则; 尾方尚文
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2017-06-29
Filing date: 2018-05-17
Publication date: 2020-11-10
Anticipated expiration: 2038-05-17
Also published as: JP2019011140A; CN109205443A

Abstract

The invention provides a hoisting machine and an elevator, which can reduce the thickness dimension of a rope wheel of the hoisting machine. The width (L1) of an insertion part (23) of a rotor (5) of a winch (1) is made shorter than the width (L2) of a rope wheel (6), an inward flange part (31) extending along the direction of a main shaft (3) is arranged at one end of the rope wheel (6), a fixing bolt (30) penetrates through the inward flange part (31) to be screwed with an end part (24) of the rotor (5), and the rope wheel (6) is fixed to the rotor (5) by utilizing the friction force generated by an end side surface (25) of the rotor (5) and the inner wall surface (32) of the inward flange part (31).

Description

Hoist and elevator

Technical Field

The present invention relates to a hoist and an elevator.

Background

The hoist of elevator has: the frame is fixedly arranged in the lifting channel; a rotor rotatably mounted to the frame via a main shaft; and a rope pulley fixed to a side surface of the frame by a fixing bolt and used for winding up or rewinding the sling. In general, a fixing bolt for fixing the sheave is inserted through the sheave and screwed into the rotor, and the sheave is firmly fixed to the rotor by a frictional force generated by an axial force at a contact surface between the rotor and the sheave. On the other hand, since the fixing bolt is inserted through the sheave, the thickness of the sheave needs to be a certain size or more.

Conventionally, as a means for facilitating fastening of a rotating body to a rotating shaft, the following means has been disclosed: an inner diameter portion of a pulley as a rotating body is tapered, a wedge-shaped member is disposed between the pulley inner diameter portion and a rotating shaft from an end surface, and the rotating shaft and the pulley are fixed by screwing a fixing bolt (patent document 1). The pulley and the flywheel are fastened by other fixing bolts.

Prior art documents

Patent document 1: japanese patent laid-open publication No. 2016-8670

However, in the case of the above-described configuration described in patent document 1, it is necessary to form the inner diameter portion of the rotating body into a tapered shape and dispose a wedge-shaped member between the inner diameter portion of the rotating body and the rotating shaft from the end surface, which requires a lot of labor for processing the member and increases the number of members, and thus it is difficult to apply the member to the hoisting machine of the elevator. Further, since the front end portions of the fixing bolts are screwed into the thick portions of the sheave of the hoisting machine, it is difficult to reduce the thickness of the sheave even when the fixing bolts are applied to the hoisting machine.

Disclosure of Invention

The invention aims to provide a hoisting machine and an elevator, which can reduce the thickness dimension of a rope wheel of the hoisting machine.

In order to solve the above problems and achieve the object of the present invention, the present invention provides a hoisting machine including: a frame; a main shaft rotatably supported by the frame; a rotor fixed to the main shaft; and a sheave fixed to the rotor and around which a rope is wound, wherein the sheave has an inward flange portion covering at least a part of an end side surface of the rotor, and the hoist further includes a fixing bolt for fixing the inward flange portion and the end side surface of the rotor.

Effects of the invention

According to the hoisting machine with the structure and the elevator with the hoisting machine with the structure, the thickness of the rope wheel of the hoisting machine can be reduced.

Problems, structures, and effects other than those described above will be apparent from the following description of the embodiments.

Drawings

Fig. 1 is a partial sectional view showing a configuration example of a hoisting machine of an elevator according to an embodiment of the present invention.

Fig. 2 is a main part sectional view of a hoist according to an embodiment of the present invention.

Fig. 3 is a front view of a rotor according to an embodiment of the present invention.

Fig. 4 is an enlarged cross-sectional view of a main portion of a sheave and a rotor according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of an elevator to which the present invention is applied.

Description of reference numerals:

1, a winch;

2, a base;

3, a main shaft;

4, a frame;

5, a rotor;

6, rope wheels;

7, a shaft bracket;

10 an annular recess;

11 a boss portion;

12 a support wall;

13 shaft holes;

14 bearings;

15 a fixing member;

20 a brake disk;

21 a rotating member;

22 a cylindrical wall;

23 an insert portion;

24 end portions;

25 end side faces;

26 an outer peripheral wall surface;

28 thickness part;

29 bolt holes;

30 fixing bolts;

31 toward the inner flange portion;

32 inner wall surface;

33 the other end side surface;

34 through holes;

a 40 shaft hole;

41 bearings;

42 elevator;

43 an elevator car;

44 a counterweight;

45 suspension ropes;

46 a lifting channel;

47 machine room.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings.

[ examples ]

Hereinafter, a mode for implementing a hoisting machine and an elevator according to the present invention 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 redundant description thereof is omitted.

The elevator 42 of fig. 5 includes: an elevator car 43 that ascends and descends in a hoistway 46 of the building; a suspension rope 45 having one end connected to the elevator car 43; a counterweight 44 connected to the other end of the sling 45; and a hoist 1 provided in the machine room 47 and winding up the hoist rope 45.

The elevator 42 of the present embodiment includes a hoisting machine 1, and a hoisting body, not shown, that is, an elevator car 43 and a counterweight 44, is raised or lowered in a hoistway 46 by winding up or rewinding a hoisting rope 45, not shown, that is wound around the hoisting machine 1.

The hoist 1 includes: a frame 4 fixed to a base 2 disposed in the machine chamber 47 and supporting one end of the spindle 3; a rotor 5 rotatably mounted to the frame 4 via the main shaft 3; a rope pulley 6 fixed to the rotor 5 and around which a suspension rope 45 is wound; and a pedestal 7 fixed to the base 2 and supporting the other end of the spindle 3.

An annular recess 10 is formed on the front surface side of the frame 4, and a cylindrical support wall 12 is formed to protrude from the front end of a boss portion 11 remaining at the center of the annular recess 10. A shaft hole 13 is formed in the axial center position of the support wall 12 and the boss portion 11 so as to penetrate the frame 4, and one end of the spindle 3 is rotatably supported via a bearing 14 fitted into the shaft hole 13. Further, a motor stator 15 is attached to an inner surface of the outer peripheral wall of the annular recess 10. The stator 15 has a winding, and the magnetic field is continuously changed by energization.

The rotor 5 has a substantially circular disk shape as a whole, and has an axial center portion disposed coaxially with the main shaft 3 and an outer peripheral portion constituting a brake disk 20 of a disk brake. A rotor 21 of a motor that rotates together with the rotor 5 extends on one side surface of the rotor 5. The rotor 21 is composed of a permanent magnet fixed to a cylindrical wall 22 formed integrally with the rotor 5, and the magnetic action surface of the permanent magnet faces radially outward. The rotary element 21 is inserted and arranged in the annular recess 10 of the frame 4, and the rotary element 21 and the magnetic action surface of the stator 15 are opposed to each other in the radial direction with an air gap therebetween.

The sheave 6 is fixed to the rotor 5 by the fixing bolt 30, and winds up or rewinds the rope 45.

The shaft holder 7 is disposed on the opposite side of the rotor 5 from the frame side, a shaft hole 40 is formed so as to penetrate the shaft holder 7, and the spindle 3 is rotatably supported via a bearing 41 fitted into the shaft hole 40.

In general, a brake device, not shown, for braking the hoist 1 by sandwiching the brake disk 20 is supported by the pedestal 7.

In the present embodiment, a thorough study is made to reduce the thickness of the sheave 6. Here, a structure for attaching the sheave 6 to the rotor 5 will be described.

Fig. 2 is a main part sectional view of a hoist according to an embodiment of the present invention. Fig. 3 is a front view of a rotor according to an embodiment of the present invention. Fig. 4 is an enlarged cross-sectional view of a main portion of a sheave and a rotor according to an embodiment of the present invention.

In the hoist 1 of the present embodiment, the width dimension L1 of the insertion portion 23 of the rotor 5 (the length dimension from the end side surface 25 of the rotor 5 to the outer circumferential wall surface 26) is made shorter than the width dimension L2 of the sheave 6, and an inward flange portion 31 that extends in the direction of the main shaft 3 and covers at least a part of the end side surface 25 of the rotor 5 is provided at one end of the sheave 6.

The fixing bolt 30 is inserted through the inward flange 31 and screwed into the end 24 of the rotor 5, thereby fixing the inward flange 31 to the end side 25 of the rotor 5. That is, the sheave 6 is fixed to the rotor 5 by a frictional force generated between the end side surface 25 of the rotor 5 and the inner wall surface 32 of the inward flange 31.

In this way, the fixing bolt 30 is screwed into the end 24 of the rotor 5 through the inward flange portion 31, and the sheave 6 is fixed to the rotor 5 by the frictional force generated between the end side surface 25 of the rotor 5 and the inner wall surface 32 of the inward flange portion 31, whereby the fixing bolt 30 is not inserted through the entire sheave 6 as in the conventional case, and the thickness dimension of the sheave 6 can be reduced.

In the sheave 6, the length L3 from the inner wall surface 32 of the inward flange portion 31 to the other end side surface 33 is set to be shorter than the width L1 of the insertion portion 23, and when the inner wall surface 32 of the inward flange portion 31 is brought into contact with the end side surface 25 of the rotor 5, as shown in fig. 4, a slight gap L4 is generated between the other end side surface 33 of the sheave 6 and the outer peripheral wall surface 26 of the rotor 5.

This is because, when the sheave 6 is fitted to the insertion portion 23 of the rotor 5, the inner wall surface 32 of the inward flange portion 31 is reliably brought into close contact with the end side surface 25 of the rotor 5, and a predetermined frictional force is generated between the end side surface 25 of the rotor 5 and the inner wall surface 32 of the inward flange portion 31 by fastening the fixing bolt 30.

The rotor 5 is provided with a rib 27, and as shown in fig. 3, a thick portion 28 is provided at one root portion of the rib 27 (on the side of the end side surface 25 of the rotor 5), and a bolt hole 29 into which a fixing bolt 30 is screwed is bored in the thick portion 28 which is an axial line of the rib 27.

In this way, by providing the thick wall portion 28 at the root portion of the rib 27 and disposing the bolt hole 29 in the thick wall portion 28, the rigidity of the bolt hole 29 can be relatively easily ensured.

A through hole 34 through which the fixing bolt 30 is inserted is formed in the inward flange 31 of the sheave 6 so as to face the bolt hole 29.

As described above, according to the hoisting machine and the elevator of the present embodiment, the width L1 of the insertion portion 23 of the rotor 5 is made shorter than the width L2 of the sheave 6, the inward flange portion 31 extending in the direction of the main shaft 3 is provided at one end of the sheave 6, the fixing bolt 30 is inserted through the inward flange portion 31 and screwed into the end side surface 25 of the rotor 5, and the sheave 6 is fixed to the rotor 5 by the frictional force generated between the end side surface 25 of the rotor 5 and the inner wall surface 32 of the inward flange portion 31, whereby the fixing bolt 30 is not inserted through the entire sheave 6 as in the conventional case, whereby the thickness of the sheave 6 can be reduced and the weight of the sheave 6 can be reduced.

In the sheave 6, by setting the length L3 from the inner wall surface 32 of the inward flange 31 to the other end side surface 33 to be shorter than the width L1 of the insertion portion 23, when the sheave 6 is fitted to the insertion portion 23 of the rotor 5, the inner wall surface 32 of the inward flange 31 and the end side surface 25 of the rotor 5 are reliably brought into close contact with each other, and a predetermined frictional force is generated between the end side surface 25 of the rotor 5 and the inner wall surface 32 of the inward flange 31 by fastening the fixing bolt 30, whereby the sheave 6 can be firmly fixed to the rotor 5.

The embodiments of the hoisting machine and the elevator according to the present invention have been described above, including the operational effects thereof. However, the hoisting machine and the elevator of the present invention are not limited to the above-described embodiments, and can be implemented by being variously modified within a range not departing from the technical idea of the invention described in the claims.

Claims

1. A hoist is provided with:

a frame;

a main shaft rotatably supported by the frame;

a rotor fixed to the main shaft; and

a rope pulley fixed to the rotor and around which a rope is wound,

it is characterized in that the preparation method is characterized in that,

the sheave has an inward flange portion covering at least a part of an end side surface of the rotor at one end of the sheave,

the hoisting machine further includes a fixing bolt extending in the axial direction of the main shaft and fixing the inward flange portion and the end side surface of the rotor,

the length of the sheave from the inner wall surface of the inward flange to the other end side surface is shorter than the width of the sheave from the end side surface of the rotor to the outer peripheral wall surface of the rotor.

2. The hoisting machine of claim 1,

the inward flange has a through hole through which the fixing bolt passes.

3. The hoisting machine of claim 1,

the rotor is also provided with ribs which,

the rib has a thick wall portion on the end side face side of the rotor,

the thick wall portion has a bolt hole into which the fixing bolt is screwed.

4. An elevator, comprising:

an elevator car that ascends and descends in the hoistway;

a suspension cable having one end connected to the elevator car; and

a hoist that winds up the hoist rope,

the hoist has:

a frame;

a main shaft rotatably supported by the frame;

a rotor fixed to the main shaft; and

a rope pulley fixed to the rotor and around which the suspension rope is wound,

it is characterized in that the preparation method is characterized in that,