CN113291952B

CN113291952B - Large-load elevator without machine room

Info

Publication number: CN113291952B
Application number: CN202110478284.5A
Authority: CN
Inventors: 荆华俊; 傅军平; 叶立忠; 温鸣其
Original assignee: Weibo Elevator Co Ltd
Current assignee: Weibo Elevator Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-12-06
Anticipated expiration: 2041-04-30
Also published as: CN113291952A

Abstract

The invention discloses a large-load elevator without a machine room, which comprises a hoistway, wherein a lift car is arranged in the hoistway, one side of the lift car is provided with a counterweight, the lift car is provided with three first movable pulley blocks, the top of the counterweight is provided with three second movable pulley blocks, the top of the hoistway is provided with three first fixed pulley blocks, the top of the hoistway is provided with three second fixed pulley blocks, the bottom of the hoistway is provided with a traction machine, the traction machine is provided with a traction wheel, one side of the traction wheel is provided with a third fixed pulley block, the other side of the traction wheel is provided with a fourth fixed pulley block, the traction wheel is provided with a traction rope, one end of the traction rope passes through the third fixed pulley block and then alternately bypasses the first fixed pulley blocks and the first movable pulley blocks, the other end of the traction rope bypasses the fourth fixed pulley block and then alternately bypasses the second fixed pulley blocks and the second movable pulley blocks, and both ends of the traction rope are fixed with the top of the hoistway through ropes. The invention has the advantages of large carrying capacity, easy installation, easy maintenance and difficult occurrence of safety accidents.

Description

Large-load elevator without machine room

Technical Field

The invention belongs to the field of elevator without machine room, and particularly relates to a large-load elevator without machine room.

Background

Many buildings require flat roofs, and for such buildings, machine room elevators cannot be installed, and only machine room-less elevators can be used. The traction ratio adopted by the existing elevator without machine room is usually 2:1 or 4:1, the load capacity of the elevator is small, the maximum load capacity of the elevator without a machine room in the current market is not more than 5 tons, and the requirement of the market on large load capacity is difficult to meet. The tractor of the existing machine room-less elevator is usually arranged at the top of a hoistway through a beam frame and is in a high-altitude state, and the weight of the tractor is very large, so that the installation and subsequent maintenance of the tractor are difficult, namely the installation and maintenance of the machine room-less elevator are difficult. In current no computer lab elevator, the driving sheave both sides of hauler are car and counter weight respectively, and the driving sheave passes through the towline and drives the car and rise in opposite directions with the counter weight, and the driving sheave receives car weight and counter weight dual function, receives very big downward pressure, including hauler self weight for the hauler has the risk of dropping, and when the hauler dropped, the route that drops of hauler passed through the car, leads to the car to fall, causes serious incident.

Therefore, the existing elevator without the machine room has the defects of small load, difficult installation, difficult maintenance and easy occurrence of serious safety accidents.

Disclosure of Invention

The invention aims to provide a large-load elevator without a machine room. The invention has the advantages of large carrying capacity, easy installation, easy maintenance and difficult occurrence of safety accidents.

The technical scheme of the invention is as follows: the elevator without the machine room comprises a hoistway, a car is arranged in the hoistway, a counterweight is arranged on one side of the car, a plurality of first movable pulley blocks are arranged on the car, a plurality of second movable pulley blocks are arranged on the top of the counterweight, a plurality of first fixed pulley blocks corresponding to the first movable pulley blocks are arranged on the top of the hoistway, a plurality of second fixed pulley blocks corresponding to the second movable pulley blocks are arranged on the top of the hoistway, a traction machine is arranged at the bottom of the hoistway, a traction wheel is arranged on the traction machine, a third fixed pulley block is arranged on one side, facing the first movable pulley blocks, of the traction wheel, a fourth fixed pulley block is arranged on one side, facing the second movable pulley blocks, of the traction wheel, a traction rope is arranged on the traction wheel, one end of the traction rope penetrates through the third fixed pulley blocks and then alternately bypasses the first fixed pulley blocks and the first movable pulley blocks, the other end of the traction rope alternately bypasses the second fixed pulley blocks and the second movable pulley blocks after bypassing the fourth fixed pulley blocks, and two ends of the traction rope are fixed with the top of the hoistway through rope.

In the large-load elevator without the machine room, the traction sheave includes a sheave body connected with a main shaft of the traction machine, a steel ring is arranged on the outer side of the sheave body, rope grooves matched with the traction ropes are formed in the outer peripheral surface of the steel ring, a plurality of first through grooves are formed between the sheave body and the steel ring, a plurality of rollers are arranged in the first through grooves, and baffles are arranged on two sides of each first channel.

In the large-load elevator without the machine room, the inner side end of the baffle is fixed to the wheel body through the screw, the outer side end of the baffle extends outwards to exceed the inner side wall of the steel ring, the outer side end of the baffle is provided with the step groove, and the bottom surface of the step groove corresponds to the end surface of the first through groove.

In the elevator without machine room and with large load, the diameter of the roller is equal to the height of the first through groove, the length of the roller is smaller than the width of the first through groove, a second through groove is arranged between the adjacent first through grooves, the second through groove is composed of an inner groove located on the outer circumferential surface of the wheel body and an outer groove located on the inner circumferential surface of the steel ring, the second through groove is provided with a long-strip-shaped key block, the lower portion of the key block is tightly matched and connected with the inner groove, and the upper portion of the key block is loosely matched and connected with the outer groove.

Compared with the prior art, the car is provided with the three movable pulley blocks, so that the traction ratio of the elevator reaches 6:1, on the basis of keeping the traction power of the traction machine unchanged, the load capacity of the elevator is improved, and the load capacity of the elevator can reach 7 tons. The traction machine is arranged at the bottom of the well, so that the height of the traction machine is reduced, the high-altitude operation of workers is avoided, and the installation and the subsequent maintenance of the traction machine are easy, namely the installation and the maintenance of an elevator are easy. Because the traction machine is arranged at the bottom of the well and is pressed downwards, the position of the traction machine is stable, the falling of the lift car cannot be caused, and safety accidents cannot be caused easily. In addition, the traction sheave is improved, so that when the traction machine is installed, the traction sheave is easily ensured to be positioned on the traction surface of the traction rope, the traction rope cannot be eccentrically worn on the rope groove of the traction sheave in the moving process, and the installation difficulty of the traction machine, namely the installation difficulty of an elevator, is also reduced. Therefore, the invention has the advantages of large carrying capacity, easy installation, easy maintenance and difficult safety accident.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1.

Fig. 2 is a front view of the traction sheave of embodiment 2.

Fig. 3 is a left side view of the traction sheave of embodiment 2.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example 1. The elevator without the machine room for the heavy load comprises a hoistway, wherein a lift car 1 is arranged in the hoistway, one side of the lift car 1 is provided with a counterweight 2, the top of the lift car 1 is provided with three first

movable pulley blocks

3A, 3B and 3C, the top of the counterweight 2 is provided with three second

movable pulley blocks

4A, 4B and 4C, the top of the hoistway is provided with three first fixed

pulley blocks

5A, 5B and 5C corresponding to the first

movable pulley blocks

3A, 3B and 3C, the top of the hoistway is provided with three second

fixed pulley blocks

6A, 6B and 6C corresponding to the second

movable pulley blocks

4A, 4B and 4C, the bottom of the hoistway is provided with a traction machine 7, the traction machine 7 is provided with a traction sheave 8, one side of the traction sheave 8, facing the first

movable pulley blocks

3A, 3B and 3C, is provided with a third fixed pulley block 9, one side of the traction sheave 8, facing the second

movable pulley blocks

4A, 4B and 4C is provided with a fourth fixed pulley block 10, a traction rope 11 is arranged on the traction sheave 8, one end of the traction sheave 11 passes through the first movable pulley blocks 3A, the traction sheave 5B, the second movable pulley blocks 4C and the traction sheave 4A, the traction sheave 6C, and the traction sheave 11 passes through the second fixed pulley blocks 12 after passing through the traction sheave 5A, the traction sheave 4A, the traction sheave 11 and the traction sheave 11.

All the fixed pulley blocks are fixed with the well, and all the movable pulley blocks and the fixed pulley blocks are guide wheel assemblies of the existing elevator and comprise guide wheels and supports on the guide wheels.

Example 2. Unlike embodiment 1 in which the traction sheave 8 of embodiment 1 is an existing traction sheave, embodiment 2 is a further improvement of the traction sheave 8. The improved traction sheave 8 comprises a sheave body 13 connected with a main shaft of the traction machine 7, a steel ring 14 is arranged on the outer side of the sheave body 13, rope grooves 15 matched with the traction ropes 11 are formed in the outer circumferential surface of the steel ring 14 (the rope grooves 15 are formed in all the movable pulley blocks), a plurality of first through grooves are formed between the sheave body 13 and the steel ring 14, a plurality of rollers 16 are arranged in the first through grooves, baffles 17 are arranged on two sides of each first channel, and the width of each baffle 17 is smaller than that of each first through groove.

The inner side end of the baffle 17 is fixed with the wheel body 13 through a screw 18, the outer side end of the baffle 17 extends outwards to exceed the inner side wall of the steel ring 14, a step groove 19 is formed in the outer side end of the baffle 17, and the bottom surface of the step groove 19 corresponds to the end surface of the first through groove.

The diameter of the roller 16 is equal to the height of the first through groove, the length of the roller 16 is smaller than the width of the first through groove, a second through groove is arranged between every two adjacent first through grooves, the cross section of each first through groove and the cross section of each second through groove are both square, each second through groove consists of an inner groove 20 located on the outer peripheral surface of the wheel body 13 and an outer groove 21 located on the inner peripheral surface of the steel ring 14, each second through groove is provided with a long-strip-shaped key block 22, the lower portion of each key block 22 is connected with the inner groove 20 in a tight fit mode, and the upper portion of each key block 22 is connected with the outer groove in a loose fit mode.

The steel ring 14 can axially move under the action of the roller 16, so that the hoisting rope 11 is ensured to be positioned at the middle position of the rope groove 15, and even if the installation position of the traction machine has certain forward and backward movement deviation, the steel ring 14 can automatically align under the action of the hoisting rope 11, so that the rope groove 15 corresponds to the hoisting rope, the eccentric wear of the hoisting rope is avoided, and the installation difficulty of the traction machine is reduced. The rollers 16 have the advantage of high compressive resistance, and the plurality of rollers 16 effectively support the steel ring 14 to prevent the steel ring 14 from deforming, so that the traction sheave 8 has high radial strength. The key blocks 22 have high shearing resistance, and the plurality of key blocks 22 enable high torque transmission capacity between the steel ring 14 and the wheel body 13, and high torsional strength of the traction sheave 8 is reserved. The key block 22 also makes the roller 16 bear only radial pressure without torsion, thereby not easy to bend, making the steel ring 14 move smoothly, further ensuring the rope groove 15 corresponding to the hauling rope, avoiding eccentric wear of the hauling rope.

The working principle is as follows: the traction machine 7 drives the traction sheave 8 to rotate, the traction sheave 8 drives the traction rope 11 to move, and the lift car 1 and the counterweight 2 move in reverse directions under the action of the movable fixed pulley.

Claims

1. Big load does not have computer lab elevator, its characterized in that: comprises a hoistway, a lift car (1) is arranged in the hoistway, one side of the lift car (1) is provided with a counterweight (2), the lift car (1) is provided with a plurality of first movable pulley blocks (3A, 3B and 3C), the top of the counterweight (2) is provided with a plurality of second movable pulley blocks (4A, 4B, 4C), the top of the hoistway is provided with a plurality of first fixed pulley blocks (5A, 5B, 5C) corresponding to the first movable pulley blocks (3A, 3B, 3C), the top of the hoistway is provided with a plurality of second fixed pulley blocks (6A, 6B, 6C) corresponding to the second movable pulley blocks (4A, 4B, 4C), the bottom of the hoistway is provided with a traction machine (7), the traction machine (7) is provided with a traction wheel (8), one side of the traction wheel (8) facing the first movable pulley blocks (3A, 3B, 3C) is provided with a third fixed pulley block (9), one side of the traction wheel (8) facing the second movable pulley blocks (4A, 4B, 4C) is provided with a fourth fixed pulley block (10), the traction wheel (8) is provided with a traction pulley block (11), one end of the traction rope (11) passes through the third fixed pulley block (9) and then alternately winds around the first fixed pulley blocks (5A, 5B, 5C) and the traction wheel (3C), and the other end of the second fixed pulley blocks (6A, 4B, 4C), and the traction wheel (11) alternately winds the second fixed pulley blocks (6A, 4C), and the other end of the traction wheel (6A, 4B, 4C), and the traction wheel (6C) after passing through the second fixed pulley blocks (6A, 4C), and the traction wheel (11);

the traction wheel (8) comprises a wheel body (13) connected with a main shaft of the traction machine (7), a steel ring (14) is arranged on the outer side of the wheel body (13), a rope groove (15) matched with the traction rope (11) is formed in the outer peripheral surface of the steel ring (14), a plurality of first through grooves are formed between the wheel body (13) and the steel ring (14), a plurality of rollers (16) are arranged in the first through grooves, and baffles (17) are arranged on two sides of each first channel;

the diameter of the roller (16) is equal to the height of the first through groove, the length of the roller (16) is smaller than the width of the first through groove, a second through groove is formed between every two adjacent first through grooves, the second through groove consists of an inner groove (20) located on the outer peripheral surface of the wheel body (13) and an outer groove (21) located on the inner peripheral surface of the steel ring (14), a long-strip-shaped key block (22) is arranged in the second through groove, the lower portion of the key block (22) is connected with the inner groove (20) in a tight fit mode, and the upper portion of the key block (22) is connected with the outer groove in a loose fit mode.

2. The heavy-load machine-roomless elevator according to claim 1, characterized in that: the inner side end of the baffle (17) is fixed with the wheel body (13) through a screw (18), the outer side end of the baffle (17) extends outwards to exceed the inner side wall of the steel ring (14), a step groove (19) is formed in the outer side end of the baffle (17), and the bottom surface of the step groove corresponds to the end face of the first through groove.