CN110654951A

CN110654951A - Elevator balance rescue device and elevator balance rescue system

Info

Publication number: CN110654951A
Application number: CN201910925840.1A
Authority: CN
Inventors: 李志鸣; 范仲华
Original assignee: Hitachi Elevator China Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-01-07

Abstract

The application provides an elevator balance rescue device and an elevator balance rescue system, wherein the elevator balance rescue device comprises a rope, a rope collecting device, an anti-reversion device, an extension piece, a first wheel carrier and a second wheel carrier which are separable, the first wheel carrier is connected with a first pulley in a rotating mode, the second wheel carrier is connected with a second pulley in a rotating mode, one end of the rope is fixed on the second wheel carrier, and the other end of the rope is fixedly connected with the second pulley after bypassing the first pulley; the second pulley is in transmission connection with the rope collecting device and the anti-reversion device, wherein the rope collecting device is used for driving the second pulley to rotate along the rope collecting direction; the anti-reversion device is used for preventing the second pulley from reversion in the process of rotating along the rope retracting direction; the extension piece is fixedly connected with the rope collecting device and used for driving the rope collecting device to drive the second pulley to rotate along the rope collecting direction. The elevator balance rescue device can improve rescue efficiency and reduce potential safety hazards.

Description

Elevator balance rescue device and elevator balance rescue system

Technical Field

The application belongs to the technical field of elevators, and particularly relates to an elevator balance rescue device and an elevator balance rescue system.

Background

At present, the development of the elevator without the machine room is very rapid, along with the further popularization and application of the elevator without the machine room, the product demand of the elevator without the machine room in the market is increased day by day, but when the elevator without the machine room is in a condition that people are trapped and need to be rescued, because the main machine of the elevator is arranged in the shaft, the operating personnel can not directly carry out the turning operation on the main machine to carry out rescue like a machine room elevator, when the building power supply and the power failure self-rescue power supply both fail, as the manned lift car and the counterweight are close to each other in weight, the condition that the lift car can not slide for moving for rescue after the tractor brake is released can occur, aiming at the condition, the balance state is broken by mostly adopting a mode of adding a heavy object on the top of the lift car in the prior art, however, the rescue mode has potential safety hazards, and the extreme condition that the operation personnel cannot be introduced into the car roof is difficult to deal with, so that the rescue efficiency is seriously influenced.

Disclosure of Invention

In order to overcome the defects in the prior art, the purpose of the application is to provide an elevator balance rescue device and an elevator balance rescue system, and the elevator balance rescue device and the elevator balance rescue system aim at solving the problems that in a machine room-less elevator product, when people are trapped due to elevator faults, the existing rescue mode is low in efficiency and large in potential safety hazard.

The technical scheme adopted by the application for solving the technical problem is as follows:

a balanced rescue device of an elevator comprises a rope, a rope collecting device, an anti-reversion device, an extension piece, a first wheel carrier and a second wheel carrier which can be separated, wherein a first pulley is rotationally connected in the first wheel carrier, a second pulley is rotationally connected in the second wheel carrier, one end of the rope is fixed on the second wheel carrier, and the other end of the rope is fixedly connected with the second pulley after bypassing the first pulley; the second pulley is in transmission connection with the rope collecting device and the anti-reversion device, wherein the rope collecting device is used for driving the second pulley to rotate along the rope collecting direction; the anti-reversion device is used for preventing the second pulley from reversion in the process of rotating along the rope retracting direction; the extension piece is fixedly connected with the rope collecting device and used for driving the rope collecting device to drive the second pulley to rotate along the rope collecting direction.

Preferably, the elevator balance rescue device further comprises a transmission shaft, the rope winding device comprises a handle, a gear, an elastic part and a wrench matched with the gear, a third wheel carrier is fixedly connected to a first end of the handle, a second end of the handle is fixedly connected with the extension part, the gear and the wrench are rotatably connected in the third wheel carrier, the wrench is arranged between the gear and the first end of the handle, the gear and a second pulley are sleeved on the transmission shaft, the elastic part is located between the wrench and the first end of the handle, one end of the elastic part is connected with the wrench, and the other end of the elastic part is connected with the first end of the handle; when the second pulley rotates along the rope winding direction, the wrench is meshed with the gear; when the second pulley is reversed, the wrench and the gear slide relatively.

Preferably, the elastic element comprises a spring, one end of the wrench is provided with a first pulling lip and a second pulling lip, and the other end of the wrench is provided with a columnar part; a blind hole is arranged on the end face of the first end of the handle, one end of the spring extends into the blind hole, and the other end of the spring is sleeved on the columnar part; the first pull lip is provided with a first inner side face and a first outer side face, the second pull lip is provided with a second inner side face and a second outer side face, the first inner side face and the second inner side face are arc faces, the arc radius of the second inner side face is larger than that of the first inner side face, the first outer side face and the second outer side face are inclined faces, and the inclination direction of the first outer side face is opposite to that of the second outer side face.

Preferably, the anti-reverse device comprises a ratchet wheel and a pawl matched with the ratchet wheel, the ratchet wheel is sleeved on the transmission shaft and is positioned between the second wheel frame and the third wheel frame, the pawl is rotationally connected to the second wheel frame, and when the second pulley is reversed, the pawl stops the ratchet wheel.

Preferably, the end, far away from the second pulley, of the transmission shaft is in threaded connection with a butterfly nut, a shaft body is arranged on the side face, facing the gear, of the butterfly nut, and round holes matched with the shaft body are formed in the end face, facing the butterfly nut, of the gear, wherein the number of the shaft body is at least two, and the number of the round holes is at least two.

An elevator balance rescue system comprises a traction machine band-type brake, a lifting rope, a car, a counterweight, an elevator compensation device, an elevator pit and the elevator balance rescue device, wherein the traction machine band-type brake respectively pulls the car and the counterweight through the lifting rope, one end of the elevator compensation device is fixed at the bottom of the car, and the other end of the elevator compensation device is fixed at the bottom of the counterweight; the first wheel carrier is arranged on the elevator compensation device, the second wheel carrier is arranged on the elevator pit, and the elevator compensation device is a cable or a chain.

Preferably, the elevator balance rescue system further comprises a first connecting piece, one end of the first wheel frame is provided with a first hook, and the first hook is fixedly connected with the elevator compensation device through the first connecting piece.

Preferably, the first connecting piece comprises a U-shaped bolt, a pressing plate and at least two adjusting nuts, two ends of the U-shaped bolt penetrate through the pressing plate respectively and are in threaded connection with the at least one adjusting nut respectively, the elevator compensating device penetrates through the U-shaped bolt, and the first hook is hung on the U-shaped bolt.

Preferably, when the elevator compensation device is a chain, the first connecting piece comprises a C-shaped bending piece, the first end of the C-shaped bending piece is hung on the elevator compensation device, and the first hanging hook is hung on the second end of the C-shaped bending piece.

Preferably, the elevator balance rescue system further comprises a second connecting piece mounted on the elevator pit, a second hook is arranged at one end of the second wheel frame and fixedly connected with the elevator pit through the second connecting piece, the second connecting piece is provided with a connecting hole, and the second hook is hooked in the connecting hole.

Compared with the prior art, the beneficial effects of this application are:

the elevator balance rescue device provided by the application is simple to use, and is convenient to carry, during rescue, operating personnel need not to get into the sedan-chair top and carry out the operation, only need accomplish the installation of balance rescue device at the elevator pit, then operate outside the well can, when having solved effectively and having broke down and cause the situation that personnel were stranded when the elevator, because the car is close mutually with heavy weight, lead to loosening the problem that the car can not slide the car and remove behind the hauler band-type brake, the efficiency of rescue has been improved, and the potential safety hazard is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of an elevator balance rescue device in an embodiment of the present application;

fig. 2 is an exploded schematic view of a balanced rescue device of an elevator in an embodiment of the present application;

fig. 3 is a schematic diagram of the use principle of the elevator balance rescue device in one embodiment of the application;

fig. 4 is a schematic structural diagram of an elevator balance rescue system in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an elevator balance rescue system in another embodiment of the application;

fig. 6 is a schematic view of the connection between the first hook and the elevator compensating device in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a first connecting member according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a first connecting member according to another embodiment of the present application;

FIG. 9 is a schematic structural diagram of a second connector according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a second connecting member according to another embodiment of the present application.

Description of reference numerals:

1-a first wheel frame, 101-a first hook, 2-a second wheel frame, 201-a second hook, 3-a first pulley, 4-a second pulley, 41-a mounting hole, 5-a rope, 61-a transmission shaft, 62-a butterfly nut, 621-a shaft body, 7-a rope collecting device, 71-a gear, 711-a round hole, 72-a wrench, 721-a first pulling lip, 722-a second pulling lip, 723-a columnar part, 73-an elastic part, 74-a third wheel frame, 75-a handle, 8-an anti-reversion device, 81-a ratchet wheel, 82-a pawl, 9-an extension piece, 10-a traction machine internal contracting brake, 11-a lifting rope, 12-a counterweight, 13-a car, 14-an elevator compensating device and 15-a first connecting piece, 151-U-shaped bolt, 152-pressing plate, 153-adjusting nut, 154-C-shaped bending piece, 16-second connecting piece, 161-connecting hole, 17-elevator pit, 18-out-of-well rescue area, 19-rescue flat zone and 20-guide rail base.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and the described embodiments are merely a subset of the embodiments of the present application, rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Referring to fig. 1 to 5, an embodiment of the present application provides an elevator balance rescue device, including a rope 5, a rope retracting device 7, an anti-reversing device 8, an extension member 9, and a first wheel carrier 1 and a second wheel carrier 2 which are separable, wherein the first wheel carrier 1 is rotatably connected with a first pulley 3, the second wheel carrier 2 is rotatably connected with a second pulley 4, one end of the rope 5 is fixed on the second wheel carrier 2, and the other end of the rope 5 is fixedly connected with the second pulley 4 after bypassing the first pulley 3; the second pulley 4 is in transmission connection with a rope collecting device 7 and an anti-reversion device 8, wherein the rope collecting device 7 is used for driving the second pulley 4 to rotate along the rope collecting direction; the anti-reversion device 8 is used for preventing the second pulley 4 from reversion in the process of rotating along the rope winding direction; the extension piece 9 is fixedly connected with the rope collecting device 7 and used for driving the rope collecting device 7 to drive the second pulley 4 to rotate along the rope collecting direction; wherein the rope 5 is preferably a steel wire rope; illustratively, the second pulley 4 is provided with a mounting hole 41, and the other end of the rope 5 extends into the mounting hole 41 to achieve a fixed connection with the second pulley 4 (for example, after extending into the mounting hole 41, a screw is screwed for fixation, or the mounting hole 41 is provided as a through hole, and after passing through the mounting hole 41, the other end of the rope 5 is tied to the second pulley 4 to achieve a fixed connection).

In the embodiment, the elevator balance rescue device is used in the following principle:

when in use, an operator enters an elevator pit 17, one end of the second wheel frame 2 is fixed on the elevator pit 17, then the anti-reversion device 8 is loosened, the first wheel frame 1 is pulled to be separated from the second wheel frame 2, so that the second pulley 4 rotates along the rope releasing direction until the rope 5 wound on the second pulley 4 is completely stretched, then the rescue direction is confirmed according to a rescue leveling zone 19 adjacent to the car 13, one end of the first wheel frame 1 is fixed on the elevator compensating device 14 on one side of the car 13 or the elevator compensating device 14 on one side of the counterweight 12, after the installation is completed, the operator leaves the elevator pit 17, extends the extension piece 9 to an outdoor rescue zone 18 (in an actual application scene, the outdoor rescue zone 18 is usually outside a door of the bottom hall or outside a door of a pit passage), and then the tractor brake 10 is loosened (at the moment, the counterweight 12 and the car 13 are in a balanced state), and the rope collecting device 7 is powered by operating the extension piece 9, so that the rope collecting device 7 drives the second pulley 4 to rotate along the rope collecting direction, the rope 5 is further gradually tightened downwards, the first wheel frame 1 approaches the second wheel frame 2 and pulls the elevator compensation device 14, and the car 13 is driven to move upwards or downwards to a nearby rescue leveling zone 19, so that rescue work is completed.

In this embodiment, this balanced rescue device of elevator is simple to use, and portable, during the rescue operation personnel need not to get into the sedan-chair top and carry out the operation, only need accomplish balanced rescue device's installation at elevator pit 17, then outside the well rescue district 18 utilize extension piece 9 to carry out rescue can, when the elevator breaks down and causes the situation that personnel are stranded, because car 13 is close with the weight of counter weight 12 mutually, lead to loosening the problem that car 13 can not slide car and remove behind the hauler band-type brake 10 effectively solved, the efficiency of rescue has been improved, potential safety hazard has been reduced.

Referring to fig. 1 and 4, in an alternative embodiment, the extension 9 is a rigid long rod or a flexible long rope.

Referring to fig. 1 to 5, in an alternative embodiment, the aforementioned elevator balance rescue device further includes a transmission shaft 61, the rope winding device 7 includes a handle 75, a gear 71, an elastic member 73 and a wrench 72 adapted to the gear 71, a first end of the handle 75 is fixedly connected with a third wheel frame 74, a second end of the handle 75 is fixedly connected with the extension member 9, the gear 71 and the wrench 72 are rotatably connected in the third wheel frame 74, the wrench 72 is disposed between the gear 71 and the first end of the handle 75, the gear 71 and the second pulley 4 are sleeved on the transmission shaft 61, the elastic member 73 is disposed between the wrench 72 and the first end of the handle 75 and is in a compressed state, one end of the elastic member 73 is connected with the wrench 72, and the other end is connected with the first end of the handle 75; when the second pulley 4 rotates along the rope winding direction, the wrench 72 is meshed with the gear 71; when the second pulley 4 is reversed (i.e., the second pulley 4 is rotated in the payout direction), the wrench 72 slides relative to the gear 71; the elastic member 73 may be made of a material having a good elastic restoring force, such as a spring or rubber.

In the present embodiment, the operation principle of the rope retracting device 7 is as follows:

after the operation personnel finish the installation of the elevator balancing device on the elevator pit 17, the operation personnel returns to the rescue area outside the well, then the tractor internal contracting brake 10 is loosened, the handle 75 is pulled downwards (namely, the handle 75 is rotated clockwise) through the extension piece 9, the wrench 72 engages with the gear 71, along with the rotation of the handle 75, the wrench 72 drives the gear 71 to rotate clockwise and drives the transmission shaft 61 to rotate clockwise, further drives the second pulley 4 to rotate clockwise (namely, rotates along the rope receiving direction), along with the rotation of the second pulley 4, the rope 5 is tightened downwards, the first wheel frame 1 approaches the second wheel frame 2 and pulls the elevator compensating device 14, thereby driving the car 13 to move upwards or downwards for a certain distance, when the handle 75 is pulled to the lowest action point, the handle 75 is pushed to rotate anticlockwise through the extension piece 9 until the wrench 72 is engaged with the gear 71 again, in the process of rotating the push handle 75 counterclockwise, the wrench 72 and the gear 71 slide relative to each other (i.e., a slip occurs between the wrench 72 and the gear 71), so that the wrench 72 does not drive the gear 71 to rotate counterclockwise, and meanwhile, under the action of the anti-reverse device 8, the second pulley 4 is not reversed due to the action of gravity, thereby ensuring that the wrench 72 can be engaged with the gear 71 again; subsequently, the same procedure as described above is repeated by driving the handle 75 through the extension 9, so that the handle 75 is continuously operated in a forward and backward reciprocating manner, so that the second pulley 4 can gradually tighten the rope 5 along the rope tightening direction, thereby gradually moving the car 13 upward or downward until reaching the adjacent rescue flat zone 19, and completing the rescue work.

In this embodiment, this receipts rope device 7 simple structure and ingenious, according to lever principle, utilize spanner 72 to carry out the interlock drive to gear 71 for the operation personnel only need utilize extension 9 positive and negative reciprocating outside the well to carry out continuous operation to handle 75, can accomplish elevator trapping's rescue work, convenient operation and laborsaving has improved the efficiency of rescue effectively, and wherein, the setting of elastic component 73 makes spanner 72 can keep in contact with gear 71 all the time, guarantees that handle 75 can carry out continuous operation positive and negative reciprocating.

Referring to fig. 1 to 5, in an alternative embodiment, the elastic member 73 includes a spring, and the wrench 72 has a first pulling lip 721 and a second pulling lip 722 at one end and a cylindrical portion 723 at the other end; a blind hole (not shown) is formed on the end surface of the first end of the handle 75, one end of the spring extends into the blind hole, and the other end of the spring is sleeved on the columnar part 723; the first pulling lip 721 has a first inner side surface (not shown in the drawings) and a first outer side surface (not shown in the drawings), and the second pulling lip 722 has a second inner side surface (not shown in the drawings) and a second outer side surface (not shown in the drawings), wherein the first inner side surface and the second inner side surface are arc surfaces, the arc radius of the second inner side surface is larger than that of the first inner side surface (corresponding to the second pulling lip 722 extending outwards longer than the first pulling lip 721), the first outer side surface and the second outer side surface are inclined surfaces, and the inclination direction of the first outer side surface is opposite to that of the second outer side surface.

In this embodiment, specifically, when the handle 75 is pulled downward by the extension 9 (i.e., the handle 75 is rotated clockwise), the first and

second lips

721, 722 engage with the gear 71, and as the handle 75 rotates, the wrench 72 drives the gear 71 to rotate clockwise and drives the transmission shaft 61 to rotate clockwise (wherein the first lip 721 tilts upward and gradually separates from the gear 71, and the second lip 722 always contacts with the gear 71), and further drives the second pulley 4 to rotate clockwise (i.e., rotates along the rope retracting direction), and as the second pulley 4 rotates, the rope 5 tightens downward, the first wheel frame 1 approaches the second wheel frame 2 and pulls the elevator compensating device 14, so as to drive the car 13 to move upward or downward for a certain distance, and when the handle 75 is pulled to the lowest acting point, the handle 75 is pushed by the extension 9 to rotate until the first lip 721 rotates counterclockwise, The second pulling lip 722 is engaged with the gear 71 again, wherein during the process of rotating the pushing handle 75 counterclockwise, the transmission shaft 61 does not drive the gear 71 to rotate counterclockwise under the action of the anti-reverse device 8, so that under the action of the inner arc surface of the wrench 72, the wrench 72 can slide relatively along the gear teeth on the gear 71 (i.e. equivalent to a slip occurring between the wrench 72 and the gear 71), thereby ensuring that the first pulling lip 721 and the second pulling lip 722 can be engaged with the gear 71 again to wait for the next rope winding operation.

Referring to fig. 1 to 5, in an alternative embodiment, the anti-reverse rotation device 8 includes a ratchet 81 and a pawl 82 adapted to the ratchet 81, the ratchet 81 is sleeved on the transmission shaft 61 and located between the second wheel frame 2 and the third wheel frame 74, the pawl 82 is rotatably connected to the second wheel frame 2, wherein when the second pulley 4 reverses, the pawl 82 stops the ratchet 81.

In the present embodiment, the principle of use of the reverse rotation preventing device 8 is as follows:

when the elevator is used, an operator enters the elevator pit 17, one end of the second wheel frame 2 is fixed on the elevator pit 17, then one end of the pawl 82 far away from the ratchet 81 is pressed downwards by hand, so that the end, in contact with the ratchet 81, of the pawl 82 is tilted upwards, under the tilting of the pawl 82, the ratchet 81 rotates clockwise to be separated from the pawl 82, when one end, close to the ratchet 81, of the pawl 82 is separated from the ratchet 81, the first wheel frame 1 is pulled by hand to be separated from the second wheel frame 2, the second pulley 4 rotates along the rope releasing direction, the rope 5 wound on the second pulley 4 is gradually spread, and after the rope 5 is completely spread, the force applied to the pawl 82 is removed, so that the pawl 82 is in contact with the ratchet 81 again; when the operator finishes the installation of the elevator balancing device on the elevator pit 17, the operator returns to the rescue area outside the well, then the tractor brake 10 is loosened, the handle 75 is pulled downwards through the extension piece 9, the wrench 72 engages with the gear 71, along with the rotation of the handle 75, the wrench 72 drives the gear 71 to rotate clockwise and drives the transmission shaft 61 to rotate clockwise, further the transmission shaft 61 drives the ratchet 81 and the second pulley 4 to rotate clockwise together, along with the clockwise rotation of the second pulley 4, the rope 5 is tightened downwards, the first wheel carrier 1 approaches the second wheel carrier 2 and pulls the elevator compensating device 14, thereby driving the elevator car 13 to move upwards or downwards for a certain distance, when the pull handle 75 reaches the lowest action point, the handle 75 is pushed to rotate anticlockwise through the extension piece 9 until the wrench 72 engages with the gear 71 again, wherein, in the process of rotating the push handle 75 anticlockwise, because the wrench 72 and the gear 71 slide relatively (i.e. a slip occurs between the wrench 72 and the gear 71), the wrench 72 does not drive the gear 71 to rotate counterclockwise, and meanwhile, when the second pulley 4 is ready to rotate reversely due to the action of gravity, the pawl 82 is clamped on the ratchet 81 to stop the ratchet 81, so that the transmission shaft 61 cannot rotate counterclockwise, thereby preventing the second pulley 4 from rotating reversely due to the action of gravity and ensuring that the wrench 72 can be engaged with the gear 71 again; subsequently, the same procedure as described above is repeated by driving the handle 75 through the extension 9, so that the handle 75 is continuously operated in a forward and backward reciprocating manner, so that the second pulley 4 can gradually tighten the rope 5 along the rope tightening direction, thereby gradually moving the car 13 upward or downward until reaching the adjacent rescue flat zone 19, and completing the rescue work.

Referring to fig. 2 to 5, in an alternative embodiment, a butterfly nut 62 is connected to one end of the transmission shaft 61 away from the second pulley 4 in a threaded manner, a shaft body 621 is disposed on a side surface of the butterfly nut 62 facing the gear 71, and a circular hole 711 matched with the shaft body 621 is disposed on an end surface of the gear 71 facing the butterfly nut 62, wherein the number of the shaft bodies 621 is at least two, and the number of the circular hole 711 is at least two; illustratively, the number of the shaft bodies 621 is two, the number of the circular holes 711 is two, and the shaft bodies 621 are in clearance fit with the circular holes 711.

In the present embodiment, the butterfly nut 62 is used in the following principle:

when the elevator balance rescue device is used, an operator enters the elevator pit 17, one end of the second wheel frame 2 is fixed on the elevator pit 17, the butterfly nut 62 is unscrewed slightly by hand to ensure that the ratchet 81 is not pressed too tightly, then one end of the pawl 82 far away from the ratchet 81 is pressed downwards by hand to ensure that one end of the pawl 82 in contact with the ratchet 81 is upwards tilted, the ratchet 81 rotates clockwise to prepare to be separated from the pawl 82 under the tilting of the pawl 82, when one end of the pawl 82 close to the ratchet 81 is separated from the ratchet 81, the first wheel frame 1 is pulled by hand to be separated from the second wheel frame 2, the second pulley 4 rotates in a rope releasing direction (namely, anticlockwise direction), the rope 5 wound on the second pulley 4 is gradually opened, after the rope 5 is completely opened, the force applied to the pawl 82 is removed to ensure that the pawl 82 is in contact with the ratchet 81 again, and then the butterfly nut 62 is screwed again to finish the rope releasing process of the elevator balance rescue device, during the rope releasing process, the gear 71 is engaged with the wrench 72, so that the handle 75 rotates along with the rotation of the transmission shaft 61; in addition, due to the arrangement of the shaft body 621 and the round hole 711, the wing nut 62 can rotate along with the rotation of the transmission shaft 61 and the gear 71 in the whole process of use.

In the embodiment, the butterfly nut 62 is arranged at one end of the transmission shaft 61, so that the ratchet 81 and the rope collecting device 7 can be prevented from moving along the axial direction of the transmission shaft 61 in the using process, and the rope releasing process can be completed conveniently by manual operation without an additional tool.

Referring to fig. 2, 4 and 5, the elevator balance rescue system comprises a tractor contracting brake 10, a lifting rope 11, a car 13, a counterweight 12, an elevator compensating device 14, an elevator pit 17 and the elevator balance rescue device, wherein the tractor contracting brake 10 respectively pulls the car 13 and the counterweight 12 through the lifting rope 11, one end of the elevator compensating device 14 is fixed at the bottom of the car 13, and the other end is fixed at the bottom of the counterweight 12; the first wheel carrier 1 is arranged on an elevator compensating gear 14, the second wheel carrier 2 is arranged on an elevator pit, and the elevator compensating gear 14 is a cable or a chain.

In this embodiment, the operation principle of the elevator balance rescue system has been described in detail in the above embodiments of the elevator balance rescue device, and those skilled in the art can understand that the description is omitted here.

Referring to fig. 2, 4 and 5, in an alternative embodiment, the aforementioned elevator balance rescue system further includes a first connecting member 15, one end of the first wheel frame 1 is provided with a first hook 101, and the first hook 101 is fixedly connected with the elevator compensating device 14 through the first connecting member 15.

In this embodiment, the first wheel frame 1 can be conveniently hung on the elevator compensating device 14 by arranging the first connecting piece 15.

Referring to fig. 5 to 7, in an alternative embodiment, the first connecting member 15 includes a "U" bolt 151, a pressing plate 152 and at least two adjusting nuts 153, two ends of the "U" bolt 151 respectively penetrate through the pressing plate 152 and are respectively in threaded connection with the at least one adjusting nut 153, the elevator compensating device 14 is arranged in the "U" bolt 151 in a penetrating manner, and the first hook 101 is hung on the "U" bolt 151.

In this embodiment, the first connecting member 15 may be configured according to the type of the elevator compensating device 14, wherein when the type of the elevator compensating device 14 is a rope or a chain, the first connecting member 15 may be configured in a form of a "U" bolt 151 configured with a pressing plate 152 and a nut, specifically, when it is installed, the elevator compensating device 14 is placed in an opening of the "U" bolt 151, then the pressing plate 152 is closed at both ends of the "U" bolt 151 and the adjusting nut 153 is screwed, then the first hook 101 is hooked on the "U" bolt 151, and the first wheel carriage 1 can be reliably hung on the elevator compensating device 14 by screwing the adjusting nut 153, which is very convenient.

Referring to fig. 5, 6 and 8, in an alternative embodiment, when the elevator compensation device 14 is a chain, the first connecting member 15 includes a "C" shaped bending member 154, a first end of the "C" shaped bending member 154 is hung on the elevator compensation device 14, and the first hook 101 is hung on a second end of the "C" shaped bending member 154.

In this embodiment, when the elevator compensation device 14 is a chain, the first connecting member 15 may be a C-shaped bent steel member, specifically, when the elevator compensation device 14 is installed, one end of the C-shaped bent member 154 is hooked on a chain link of the elevator compensation device 14, and the first hook 101 is hooked on the other end of the C-shaped bent member 154, so that the first wheel carrier 1 can be hung on the elevator compensation device 14, which is very convenient.

Referring to fig. 2, 5, 9 and 10, in an alternative embodiment, the aforementioned elevator balance rescue system further includes a second connecting member 16 installed on the elevator pit 17, one end of the second wheel frame 2 has a second hook 201, and the second hook 201 is fixedly connected with the elevator pit 17 through the second connecting member 16, wherein the second connecting member 16 has a connecting hole 161, and the second hook 201 is hooked in the connecting hole 161.

In this embodiment, during installation, the second wheel frame 2 can be installed on the elevator pit 17 only by hooking the second hook 201 on the connection hole 161 of the second connection member 16, which is very convenient, wherein the structural form of the second connection member 16 can be determined according to the hoistway arrangement manner of the machine room free elevator, for example, as shown in fig. 9, in some specific embodiments, the second connection member 16 can be a "T" type pull ring, the bottom plate of the "T" type pull ring is fixed on the elevator pit 17 through a fastener (such as a fastening screw, etc.), and the middle plate of the "T" type pull ring is provided with a connection hole 161; for another example, as shown in fig. 10, in other embodiments, the second connecting member 16 may be an "L" shaped bending member integrated with the rail base 20.

The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application in any way, so that any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present application will still fall within the scope of the present application.

Claims

1. An elevator balance rescue device is characterized by comprising a rope, a rope collecting device, an anti-reversion device, an extension piece, a first wheel carrier and a second wheel carrier which can be separated from each other, wherein a first pulley is rotationally connected to the first wheel carrier, a second pulley is rotationally connected to the second wheel carrier, one end of the rope is fixed on the second wheel carrier, and the other end of the rope is fixedly connected with the second pulley after bypassing the first pulley; the second pulley is in transmission connection with the rope retracting device and the anti-reversion device, wherein,

the rope collecting device is used for driving the second pulley to rotate along the rope collecting direction;

the anti-reverse device is used for preventing the second pulley from reversing in the process of rotating along the rope winding direction;

the extension piece is fixedly connected with the rope winding device and used for driving the rope winding device to drive the second pulley to rotate along the rope winding direction.

2. The elevator balance rescue device according to claim 1, further comprising a transmission shaft, wherein the rope retracting device comprises a handle, a gear, an elastic member and a wrench adapted to the gear, a third wheel carrier is fixedly connected to a first end of the handle, a second end of the handle is fixedly connected to the extension member, the gear and the wrench are rotatably connected to the third wheel carrier and disposed between the gear and the first end of the handle, the gear and a second pulley are sleeved on the transmission shaft, the elastic member is disposed between the wrench and the first end of the handle, one end of the elastic member is connected to the wrench, and the other end of the elastic member is connected to the first end of the handle; when the second pulley rotates along the rope winding direction, the wrench is meshed with the gear; when the second pulley is reversed, the wrench and the gear slide relatively.

3. The elevator balance rescue apparatus according to claim 2, wherein the elastic member comprises a spring, one end of the wrench has a first pull lip and a second pull lip, and the other end has a column portion; a blind hole is formed in the end face of the first end of the handle, one end of the spring extends into the blind hole, and the other end of the spring is sleeved on the columnar part; the first pulling lip is provided with a first inner side face and a first outer side face, the second pulling lip is provided with a second inner side face and a second outer side face, the first inner side face and the second inner side face are arc faces, the arc radius of the second inner side face is larger than that of the first inner side face, the first outer side face and the second outer side face are inclined faces, and the inclination direction of the first outer side face is opposite to that of the second outer side face.

4. The elevator balance rescue apparatus according to claim 2, wherein the anti-reverse rotation device comprises a ratchet wheel and a pawl adapted to the ratchet wheel, the ratchet wheel is sleeved on the transmission shaft and located between the second wheel frame and the third wheel frame, the pawl is rotatably connected to the second wheel frame, and when the second pulley is reversed, the pawl stops the ratchet wheel.

5. The elevator balance rescue device according to any one of claims 2 to 4, wherein a butterfly nut is connected to one end of the transmission shaft away from the second pulley in a threaded manner, a shaft body is arranged on a side surface of the butterfly nut facing the gear, and a circular hole matched with the shaft body is arranged on an end surface of the gear facing the butterfly nut, wherein the number of the shaft bodies is at least two, and the number of the circular holes is at least two.

6. An elevator balance rescue system is characterized by comprising a traction machine band-type brake, a lifting rope, a car, a counterweight, an elevator compensation device, an elevator pit and the elevator balance rescue device according to any one of claims 1-5, wherein the traction machine band-type brake respectively pulls the car and the counterweight through the lifting rope, one end of the elevator compensation device is fixed at the bottom of the car, and the other end of the elevator compensation device is fixed at the bottom of the counterweight; the first wheel carrier is arranged on the elevator compensation device, the second wheel carrier is arranged on the elevator pit, and the elevator compensation device is a cable or a chain.

7. The elevator balance rescue system according to claim 6, further comprising a first connecting member, wherein one end of the first wheel frame is provided with a first hook, and the first hook is fixedly connected with the elevator compensating device through the first connecting member.

8. The elevator balance rescue system according to claim 7, wherein the first connecting piece comprises a U-shaped bolt, a pressing plate and at least two adjusting nuts, two ends of the U-shaped bolt respectively penetrate through the pressing plate and are respectively in threaded connection with the at least one adjusting nut, the elevator compensation device is arranged in the U-shaped bolt in a penetrating mode, and the first hook is hung on the U-shaped bolt.

9. The elevator balance rescue system according to claim 6, wherein when the elevator compensation device is a chain, the first connecting member comprises a C-shaped bending member, a first end of the C-shaped bending member is hung on the elevator compensation device, and the first hook is hung on a second end of the C-shaped bending member.

10. The elevator balance rescue system according to any one of claims 6-9, further comprising a second connecting member mounted on the elevator pit, wherein one end of the second wheel frame is provided with a second hook, the second hook is fixedly connected with the elevator pit through the second connecting member, the second connecting member is provided with a connecting hole, and the second hook is hooked in the connecting hole.