An elevator

Abstract

The present invention discloses an elevator, comprising a car and a driving part, wherein a driving beam is arranged at the car, the driving part comprises two sprockets, two chains, and a power part, the power part can drive the sprockets to rotate, each sprocket is provided with a chain, one end of each chain is fixedly connected to the driving beam, and also comprises a safety switch and a balance bar, the balance bar comprises a rod body, the rod body has a first end and a second end, an unbalanced part is arranged at the first end or the second end, the first end and the second end are fixedly connected to the chain, the safety switch balance bar, the first end or the second end of the adjacent safety switch is provided with a touch part, and the safety switch is provided with a touched part. The driving device has a simple structure, is easy to install and has low cost, and can be used for elevators in various places, especially in villas. The introduction of the balance bar and the safety switch can play a role of timely disconnection of operation when the chain suddenly fails, which can avoid accidents caused thereby and improve safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator equipment, and in particular to an elevator. Background Art

[0002] As a means of transportation, elevators have brought great benefits to human beings, especially to people with mobility impairments. They can reach the desired floor by taking the elevator. Whether it is a shopping mall, office building, or even a private villa, people are beginning to pay attention to the use of elevators.

[0003] It is known that there are many components of elevators, and there are many types of elevators on the market. There are many types of drive modes, and the installation of the car is also very different. In the era of human pursuit of cost-effectiveness, high performance and low cost are obviously sought after. For example, for some people who need to install private elevators in their homes, or renovate old communities and install smaller elevators, cost-effectiveness considerations are particularly important. However, many types of elevators are currently not considered too much in the development of this demand, and therefore cannot be recognized by people.

[0004] Similarly, the operating safety performance of the elevator also needs to be considered. If it cannot provide good protection, there will be huge safety hazards. For example, when the elevator is running, the speed of the elevator must be moderate, and the stability of the elevator car must also be stable. Otherwise, the elevator suddenly accelerates or the car suddenly becomes unbalanced, which will have a great psychological impact on the passengers.

[0005] Therefore, how to provide an elevator that can ensure riding comfort and has high cost performance has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The lifting of the lifting gear is increased in number and is convenient to use and can be easily adjusted when the lifting gear is lowered, and the lifting gear is easily adjusted when the lifting gear is lowered, so that the lifting gear can be easily adjusted. The plate, the other end of each chain is fixedly connected to a tensioning component so that the corresponding chain is in a tensioned state, and also includes a safety switch and a balance bar, the balance bar includes a rod body, the rod body has a first end and a second end, respectively located at the two ends of the rod body, the first end or the second end is provided with an unbalanced part, when the rod body is in a suspended state with its center as a fulcrum, the first end or the second end with the unbalanced part sinks, the center of the balance bar is hinged to the movable plate, the first end and the second end are both fixedly connected to one of the chains, the safety switch is fixedly connected to the movable plate and adjacent to the balance bar, the first end or the second end adjacent to the safety switch is provided with a touch part, and the safety switch is provided with a touched part;

[0008] When the two chains stretch the balance bar to make it horizontal, the triggering part contacts the touched part to turn on the safety switch; when the first end or the second end sinks to make the balance bar tilt, the triggering part does not contact the touched part to turn off the safety switch.

[0009] As a further solution of the present invention, it also includes an elastic component, the upper sides of the two cross beam plates are bent in a direction toward the movable plate to form a folded edge, and the elastic component is arranged between the folded edge and the movable plate.

[0010] As a further solution of the present invention, the elastic component is a rubber body, a through hole is formed in the rubber body, threaded holes are formed on the folded edge and the movable plate corresponding to the through hole, and also includes bolts, which pass through the threaded hole of the folded edge, the through hole and the threaded hole of the movable plate to connect the folded edge, the rubber body and the movable plate.

[0011] As a further solution of the present invention, the unbalanced part is a counterweight block, and the first end or the second end of the counterweight block is provided with a balance rod through hole, the counterweight block is provided with a counterweight through hole corresponding to the balance rod through hole, and also includes a bolt, and the bolt fixes the counterweight block to the rod body through the balance rod through hole and the counterweight through hole.

[0012] As a further solution of the present invention, the safety switch is a micro switch.

[0013] As a further solution of the present invention, the tensioning component is a weight.

[0014] As a further solution of the present invention, a connecting rod is provided at one end of the chain connected to the weight, the connecting rod is provided with threads, and a screw hole matching the threads is provided on the end face of the weight close to the chain.

[0015] As a further scheme of the present invention, the car includes a car floor and a square frame with a vertical length. The car floor is located in the square frame and can move up and down in the vertical direction in the square frame. A transition connecting piece is provided at two adjacent corners of the car floor, each of the transition connecting pieces is detachably connected to a vertical beam, a driving beam detachably connected to the vertical beam is erected between the two vertical beams, and the tops of the two vertical beams are detachably connected to a car roof corresponding to the car floor. The square frame is formed by four vertically arranged vertical poles. Along the same horizontal plane, a cross bar is detachably connected between every two adjacent vertical poles to form a car staying layer, and a plurality of car staying layers are provided at different heights along the vertical poles.

[0016] As a further solution of the present invention, the outer side surfaces of the two vertical beams can be detachably connected with a shoe lining, the inner lining of the shoe lining is arranged toward the outside, and a guide rail is formed on the corresponding vertical pole. The guide rail is embedded in the inner lining so that the vertical beam can slide up and down relative to the vertical pole.

[0017] As a further solution of the present invention, it also includes a speed limiter, which is used to sense the driving speed of the chain, and the speed limiter can stop the movement of the chain when the chain exceeds the speed limit. It also includes a lifting device, and the lifting device includes a rotating rod, and a through hole is provided at the relative position of the two vertical beams, and both ends of the rotating rod are rotatably connected to the through hole, one end of the rotating rod extends out of the through hole to connect a linkage rod, and the other end of the linkage rod is fixedly connected to a slider, and two oppositely arranged vertical plates are provided on the vertical beam, and the slider is located between the two vertical plates. When the chain is not overspeeding, the guide rail is located between the two vertical plates and has a gap with the slider. When the chain exceeds the speed limiter, the chain stops moving, and the chain pulls the rotating rod to rotate the linkage rod, thereby driving the slider to move so that the slider and one of the vertical plates clamp the guide rail.

[0018] The present invention provides an elevator having the following technical effects:

[0019] The driving device includes two sprockets arranged opposite and in parallel, each sprocket is matched with a chain, and the rotation of the sprocket can drive the two chains to move synchronously. One end of the two chains is fixedly connected to the elevator car, and the sprocket drives the chains to move, thereby driving the car to move up and down; at the same time, the other end of the chain is equipped with a tensioning component, which can tension the corresponding chain. The driving device has a simple structure, is easy to install and has low cost, and can be used for elevators in various places, especially in villas. A balance bar is also provided, and when the two chains work normally, the two ends of the balance bar can be stretched, thereby driving the car to move through the balance bar. When the two chains stretch the balance bar to make it horizontal, the triggering part on the balance bar contacts the touched part on the safety switch, so that the safety switch is turned on and the chain works normally; if one of the chains suddenly breaks or jumps teeth, the force of the chain on the balance bar suddenly disappears, and the balance bar will inevitably tilt under the action of the other chain. At this time, the triggering part does not contact the touched part, the safety switch is disconnected, and the work can be stopped in time, ensuring the safety of the elevator; if both chains break or jump teeth, the balance bar will inevitably tilt under the action of the unbalanced part. Similarly, the triggering part does not contact the touched part, the safety switch is disconnected, and the operation safety of the elevator is also guaranteed. It can be seen that through the introduction of the balance bar and the safety switch, when the chain suddenly fails, it can play a role in timely disconnection of operation, which can avoid the accidents caused by it and improve the safety performance.

[0020] Furthermore, a crossbeam plate is provided on both sides of the moving plate, which can protect the moving plate; the crossbeam forms a folded edge, and an elastic component is provided between each folded edge and the moving plate, so that when the moving plate is suddenly started or stopped under the action of the chain, the elastic component can play a certain shock-absorbing and buffering role, so that the vibration of the moving plate is minimized, thereby increasing the safety and comfort of riding the elevator. The folded edge is part of the crossbeam plate itself, which is integrally formed and has a low cost. Providing two crossbeam plates and two folded edges can make the elastic component between the folded edge and the moving plate be installed more firmly.

[0021] Furthermore, the safety switch is a micro switch, and the actuator on the micro switch can open or close the micro switch by acting on the touch part.

[0022] Furthermore, the weight is used as a tensioning component, which is easy to obtain and has low cost.

[0023] Furthermore, the connecting rod on the weight has threads, and the weight is provided with matching screw holes, and the two cooperate to adjust the connection position of the weight and the chain.

[0024] Furthermore, the elevator comprises a car floor and a square frame with a vertical length, wherein a transition connector is provided at two adjacent corners of the car floor, each transition connector is detachably connected to a vertical beam, a horizontal beam detachably connected to the vertical beam is erected between the two vertical beams, and the tops of the two vertical beams are detachably connected to the car roof corresponding to the car floor, and the square frame is formed by four vertically arranged vertical poles, and along the same horizontal plane, a horizontal bar detachably connected between each two adjacent vertical poles forms a car stop layer, and multiple car stop layers are provided along different heights of the vertical poles. The car floor is detachably connected to the transition connector, the transition connector is detachably connected to the vertical beam, the vertical beam is detachably connected to the horizontal beam, and the vertical beam is detachably connected to the car roof, and the direction frame is also formed by vertical poles and horizontal bars detachably connected to each other, and each component can be manufactured separately and assembled on site, which is convenient for transportation, and can avoid the problem that larger components in the prior art are difficult to put in place.

[0025] Furthermore, a boot lining is provided, which is detachably connected to the vertical beam, and can be replaced in time if any problem occurs.

[0026] Furthermore, setting a speed limiter can ensure the safe operation of the elevator.

[0027] Furthermore, a lifting device is provided, which can tightly clamp the guide rail by adjusting the position of the slider, thereby achieving timely operation and stability of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1A schematic structural diagram of a specific implementation of an elevator provided by the present invention;

[0029] Figure 2 A schematic structural diagram of a specific implementation of a group of sprocket chains in a driving unit of an elevator provided by the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the rectangular parallelepiped;

[0031] Figure 4 A structural schematic diagram of a specific implementation method of an elevator provided by the present invention, including a balance bar and a movable plate connection;

[0032] Figure 5 The present invention is a structural schematic diagram of a specific implementation method of connecting an elastic component of an elevator with related components provided by the present invention.

[0033] Figure 1-2 The accompanying drawings are denoted as follows:

[0034] 1 car, 2 driving beam, 3 moving plate, 4 cross beam plate, 5 sprocket, 6 chain, 7 weight, 8 chain bushing, 9 cuboid, 10 screw, 11 first through hole, 12 second through hole, 13 balance bar, 14 counterweight, 15 safety switch, 16 metal sheet, 17 car bottom plate, 18 vertical beam, 19 car top plate, 20 shoe lining, 21 rotating rod, 22 linkage rod, 23 vertical plate, 24 slider, 25 elastic component. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] like Figure 1-5 As shown, Figure 1 A schematic structural diagram of a specific implementation of an elevator provided by the present invention;

[0037] Figure 2 A schematic structural diagram of a specific implementation of a group of sprocket chains in a driving unit of an elevator provided by the present invention;

[0038] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the rectangular parallelepiped;

[0039] Figure 4A structural schematic diagram of a specific implementation method of an elevator provided by the present invention, including a balance bar and a movable plate connection;

[0040] Figure 5 The present invention is a structural schematic diagram of a specific implementation method of connecting an elastic component of an elevator with related components provided by the present invention.

[0041] Combination Figure 1-5 The present invention provides an elevator, which includes a car 1 and a driving part connected to the car 1 and capable of driving the car 1 to move up and down. A horizontally arranged driving beam 2 is provided on one side of the car 1, and the driving beam 2 includes a moving plate 3 and two cross beam plates 4. The moving plate 3 is connected to the driving part of the elevator and can move up and down. The two opposite sides of the moving plate 3 are respectively provided with a cross beam plate 4 connected to the moving plate 3. The driving part includes two sprocket wheels 5, two chains 6, and a power part. The power part is connected to the two sprocket wheels 5 and can drive the sprocket wheels 5 to rotate. The two sprocket wheels 5 are arranged in parallel and opposite to each other. Each of the sprocket wheels 5 is provided with a chain 6 that cooperates with the sprocket wheels 5. The rotation of the two sprocket wheels 5 can drive the corresponding chain 6 to move synchronously. One end of each chain 6 is fixedly connected to The movable plate 3, the other end of each of the chains 6 is fixedly connected to a tensioning component so that the corresponding chain 6 is in a tensioned state, and also includes a safety switch 15 and a balance bar 13, the balance bar 13 includes a rod body, the rod body has a first end and a second end, respectively located at the two ends of the rod body, the first end or the second end is provided with an unbalanced portion, when the rod body is in a suspended state with its center as a fulcrum, the first end or the second end with the unbalanced portion sinks, the center of the balance bar 13 is hinged on the movable plate 3, the first end and the second end are both fixedly connected to one of the chains 6, the safety switch 15 is fixedly connected to the movable plate 3 and adjacent to the balance bar 13, the first end or the second end adjacent to the safety switch 15 is provided with a triggering portion, and the safety switch 15 is provided with a triggered portion;

[0042] When the two chains 6 stretch the balance bar 13 to make the balance bar 13 horizontal, the triggering part contacts the touched part to turn on the safety switch 15; when the first end or the second end sinks to make the balance bar 13 tilt, the triggering part does not contact the touched part to turn off the safety switch 15.

[0043] The driving device includes two sprockets 5 arranged opposite and in parallel, each sprocket 5 is matched with a chain 6, the rotation of the sprocket 5 can drive the two chains 6 to move synchronously, one end of the two chains 6 is fixedly connected to the elevator car 1, and the chain 6 is driven by the sprocket 5 to move, thereby driving the car 1 to move up and down; at the same time, the other end of the chain 6 is equipped with a tensioning component, which can tension the corresponding chain 6. The driving device has a simple structure, is easy to install and has low cost, and can be used for elevators in various places, especially in villas. A balance bar 13 is also provided, and when the two chains 6 work normally, the two ends of the balance bar 13 can be stretched, thereby driving the car 1 to move through the balance bar 13. When the two chains 6 stretch the balance bar 13 so that the balance bar 13 is in a horizontal state, the triggering part on the balance bar 13 contacts the touched part on the safety switch 15, so that the safety switch 15 is turned on and the chain 6 works normally; if one of the chains 6 suddenly breaks or jumps teeth, the force of the chain 6 on the balance bar 13 suddenly disappears, and under the action of the other chain 6, the balance bar 13 will inevitably tilt. At this time, the triggering part does not contact the touched part, the safety switch 15 is disconnected, and the work can be stopped in time, ensuring the safety of the elevator; if both chains 6 break or jump teeth, under the action of the unbalanced part, the balance bar 13 will inevitably tilt. Similarly, the triggering part does not contact the touched part, the safety switch 15 is disconnected, and the operation safety of the elevator is also guaranteed. It can be seen that through the introduction of the balance bar 13 and the safety switch 15, when the chain 6 suddenly fails, it can play a role in timely disconnection of operation, which can avoid the accidents caused by it and improve the safety performance.

[0044] As shown in the figure, an elastic component 25 is also included. The upper sides of the two cross beam plates 4 are bent in a direction toward the moving plate 3 to form a folded edge. The elastic component 25 is arranged between the folded edge and the moving plate 3.

[0045] A crossbeam plate 4 is provided on both sides of the moving plate 3, which can protect the moving plate 3; the crossbeam plate 4 forms a folded edge, and an elastic component 25 is provided between each folded edge and the moving plate 3, so that when the moving plate 3 is suddenly started or stopped under the action of the chain 6, the elastic component 25 can play a certain shock-absorbing and buffering role, so that the vibration of the moving plate 3 is minimized, thereby increasing the safety and comfort of taking the elevator. The folded edge is a part of the crossbeam plate 4 itself, which is integrally formed and has a low cost. Providing two crossbeam plates 4 and two folded edges can make the elastic component 25 between the folded edge and the moving plate 3 be installed more firmly.

[0046] In this specific embodiment, as shown in the figure, the elastic component 25 is a rubber body, and a through hole is formed in the rubber body, and threaded holes are formed on the folded edge and the movable plate corresponding to the through hole, and also include bolts. The bolts pass through the threaded hole of the folded edge, the through hole and the threaded hole of the movable plate to connect the folded edge, the rubber body and the movable plate 3.

[0047] Furthermore, the unbalanced part is a counterweight block 14, and the first end or the second end of the counterweight block 14 is provided with a balance rod through hole, and the counterweight block 14 is provided with a counterweight through hole corresponding to the balance rod through hole, and also includes a bolt, and the bolt passes through the balance rod through hole and the counterweight through hole to fix the counterweight block 14 to the rod body.

[0048] Wherein, the safety switch 15 is a micro switch.

[0049] The safety switch 15 is a micro switch, and the actuator on the micro switch can open or close the micro switch by acting on the touch part.

[0050] As shown in the figure, the tensioning component is a heavy hammer 7.

[0051] The weight 7 is used as a tensioning component, which is easy to obtain and has low cost.

[0052] As a further solution of the present invention, a connecting rod is provided at one end of the chain 6 connected to the weight 7, the connecting rod is provided with threads, and a screw hole matching the threads is provided on the end face of the weight 7 close to the chain 6.

[0053] The connecting rod on the weight 7 has threads, and a matching screw hole is provided on the weight 7, and the two can cooperate to adjust the connection position of the weight 7 and the chain 6.

[0054] like Figure 1 As shown, the car 1 includes a car floor 17 and a square frame with a vertical length. The car floor 17 is located in the square frame and can move up and down in the vertical direction in the square frame. A transition connector is provided at two adjacent corners of the car floor 17, and each of the transition connectors is detachably connected to a vertical beam 18. A driving beam detachably connected to the vertical beam 18 is erected between the two vertical beams 18, and the tops of the two vertical beams 18 are detachably connected to a car roof 19 corresponding to the car floor 17. The square frame is formed by four vertically arranged vertical poles. Along the same horizontal plane, a cross bar is detachably connected between every two adjacent vertical poles to form a car stop layer, and a plurality of car stop layers are provided at different heights along the vertical poles.

[0055] The elevator comprises a car bottom plate 17 and a square frame with a vertical length, wherein a transition connector is provided at two adjacent corners of the car bottom plate 17, each transition connector is detachably connected to a vertical beam 18, a driving beam detachably connected thereto is erected between the two vertical beams 18, the tops of the two vertical beams 18 are detachably connected to a car top plate 19 corresponding to the car bottom plate 17, the square frame is formed by four vertically arranged vertical poles, along the same horizontal plane, a cross bar detachably connected between each two adjacent vertical poles forms a car stop layer, and multiple car stop layers are provided along different heights of the vertical poles. The car bottom plate 17 is detachably connected to the transition connector, the transition connector is detachably connected to the vertical beam 18, the vertical beam 17 is detachably connected to the driving beam, and the vertical beam 17 is detachably connected to the car top plate 19, the direction frame is also formed by vertical poles and cross bars detachably connected to each other, each component can be made separately, and assembled on site, which is convenient for transportation, and can avoid the problem that larger components in the prior art are difficult to put in place.

[0056] like Figure 1 As shown, the outer side surfaces of the two vertical beams 18 are detachably connected with a shoe liner 20, the inner lining of the shoe liner 20 is arranged toward the outside, and a guide rail is formed on the corresponding vertical pole, and the guide rail is embedded in the inner lining so that the vertical beam 18 can slide up and down relative to the vertical pole.

[0057] The invention also includes a speed limiter, which is used to sense the driving speed of the chain 6. The speed limiter can stop the movement of the chain 6 when the chain 6 exceeds the speed limiter. The invention also includes a lifting device, which includes a rotating rod 21. A through hole is provided at the relative position of the two vertical beams 18. Both ends of the rotating rod 21 are rotatably connected to the through hole. One end of the rotating rod 21 extends out of the through hole to connect a linkage rod 22. The other end of the linkage rod 22 is fixedly connected to a slider 24. Two vertical plates 23 arranged opposite to each other are provided on the vertical beam 18. The slider 24 is located between the two vertical plates 23. When the chain 6 does not exceed the speed limiter, the guide rail is located between the two vertical plates 23 and has a gap with the slider 24. When the chain 6 exceeds the speed limiter, the chain 6 stops the movement of the chain 6. The chain 6 pulls the rotating rod 21 to rotate the linkage rod 22, which drives the slider 24 to move so that the slider 24 and one of the vertical plates 23 are stuck to the guide rail.

[0058] A shoe lining 20 is provided, which is detachably connected to the vertical beam 18, and can be replaced in time if a problem occurs. A speed limiter is provided to ensure the safe operation of the elevator.

[0059] A lifting device is provided, which can clamp the guide rail tightly by adjusting the position of the slider 24, so as to realize timely operation and stability of the elevator.

[0060] As for the elastic component 25 , the elastic component 25 may be a rubber body, which is easy to obtain and has low cost.

[0061] Of course, the present invention is not limited thereto. For example, the elastic component 25 may also be a spring.

[0062] In this specific implementation manner, the number of the rubber bodies is four, and one rubber body is disposed at both ends of each folded edge.

[0063] Four of them are arranged, and the rubber bodies are arranged symmetrically, so that the shock absorbing and buffering force is uniform and the operation is relatively stable.

[0064] The two folded edges are symmetrically arranged and have the same bending length.

[0065] The folded edges are symmetrically arranged and have the same bending length, so that the overall distribution is uniform and the overall performance of buffering and shock absorption is better.

[0066] In this specific embodiment, the rubber body is cylindrical.

[0067] The rubber body is cylindrical in shape, and the existence of the curved surface makes it easy to install and carry.

[0068] In addition, in this specific embodiment, a chain sleeve 8 is fixedly arranged in the vertical direction, and the tensioning component and the chain 6 connecting the tensioning component are placed in the chain sleeve 8 and move up and down in the chain sleeve 8. As for the chain sleeve 8, it is fixedly arranged and can be installed on the square frame of the elevator.

[0069] A chain sleeve 8 is provided to protect the chain 6 and prevent the chain 6 from shaking during movement and touching other parts.

[0070] like Figure 1 As shown, it also includes a connecting piece, which includes a rectangular parallelepiped 9 and a screw 10 connected to the lower surface of the rectangular parallelepiped 9. The screw 10 passes through the corresponding through holes and can connect the connecting piece to the movable plate through a nut. The rectangular parallelepiped 9 has a first side surface, a second side surface, a third side surface and a fourth side surface that are adjacent to each other in sequence. The first side surface and the third side surface are arranged opposite to each other and are provided with a first through hole 11 that passes through the first side surface and the third side surface. The second side surface and the fourth side surface are arranged opposite to each other and are provided with a second through hole 12 that passes through the second side surface and the fourth side surface. The first through hole 11 or the second through hole 12 can pass a pin shaft to fix the chain 6 to the connecting piece, and each chain 6 is connected to the movable plate through the connecting piece.

[0071] A connecting piece is provided, on which a screw 10 is provided, which can adjust the connection distance of the chain 6, and through the arrangement of the first through hole 11 and the second through hole 12, the connection position of the chain 6 and the cuboid 9 is possible in many ways, and fine adjustment of the distance can be achieved.

[0072] Furthermore, a height difference between the first through hole 11 and the second through hole 12 along the vertical direction is half the intercept of the chain 6 .

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator, characterized in that: The lifting of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The lifting gear of the lifting gear is 21. The other ends of the chains are fixedly connected to a tensioning component so that the corresponding chains are in a tensioned state, and also include a safety switch and a balance bar, wherein the balance bar includes a rod body, the rod body has a first end and a second end, respectively located at the two ends of the rod body, an unbalanced part is arranged at the first end or the second end, and when the rod body is in a suspended state with its center as a fulcrum, the first end or the second end with the unbalanced part sinks, the center of the balance bar is hinged to the movable plate, the first end and the second end are both fixedly connected to one of the chains, the safety switch is fixedly connected to the movable plate and adjacent to the balance bar, the first end or the second end adjacent to the safety switch is provided with a touch part, and the safety switch is provided with a touched part; When the two chains stretch the balance bar to make it horizontal, the triggering part contacts the touched part to turn on the safety switch, and when the first end or the second end sinks to make the balance bar tilt, the triggering part does not contact the touched part to turn off the safety switch. The safety switch is a micro switch; The tensioning component is a heavy hammer.

2. The elevator according to claim 1, characterized in that It also includes an elastic component. The upper sides of the two cross beam plates are bent in a direction toward the movable plate to form a folded edge. The elastic component is arranged between the folded edge and the movable plate.

3. The elevator according to claim 2, characterized in that: The elastic component is a rubber body, which has a through hole, and threaded holes are provided on the folded edge and the movable plate corresponding to the through hole, and also includes bolts, which pass through the threaded hole of the folded edge, the through hole and the threaded hole of the movable plate to connect the folded edge, the rubber body and the movable plate.

4. The elevator according to claim 1, characterized in that The unbalanced part is a counterweight block, and the first end or the second end of the counterweight block is provided with a balance rod through hole. The counterweight block is provided with a counterweight through hole corresponding to the balance rod through hole, and also includes a bolt, which passes through the balance rod through hole and the counterweight through hole to fix the counterweight block to the rod body.

5. The elevator according to claim 1, characterized in that: A connecting rod is provided at one end of the chain connected to the weight, and a thread is provided on the connecting rod. A screw hole matching the thread is provided on the end surface of the weight close to the chain.

6. The elevator according to claim 1, characterized in that: The car includes a car floor and a square frame with a vertical length. The car floor is located in the square frame and can move up and down in the vertical direction in the square frame. A transition connector is provided at two adjacent corners of the car floor, each of the transition connectors is detachably connected to a vertical beam, a driving beam detachably connected to the two vertical beams is erected between the two vertical beams, and the tops of the two vertical beams are detachably connected to a car roof corresponding to the car floor. The square frame is formed by four vertically arranged vertical poles. Along the same horizontal plane, a cross bar is detachably connected between every two adjacent vertical poles to form a car staying layer, and a plurality of car staying layers are provided at different heights along the vertical poles.

7. The elevator according to claim 6, characterized in that The outer side surfaces of the two vertical beams are detachably connected with a shoe liner, the inner lining of the shoe liner is arranged outward, and a guide rail is formed on the corresponding vertical pole, and the guide rail is embedded in the inner lining so that the vertical beam can slide up and down relative to the vertical pole.

8. The elevator according to claim 7, characterized in that: The cam is connected to the control wheel of the control wheel system, and the control wheel system is connected with the control wheel to control the movement of the control wheel. The control wheel system is connected with the control wheel to control the movement of the control wheel.

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