Elevator speed limiting device

Abstract

The utility model relates to the technical field of elevator safety, in particular to an elevator speed limiting device which comprises a lift car and a counterweight assembly which are both arranged in an elevator shaft in a sliding mode. The traction machine is connected with the lift car and the counterweight assembly and used for driving the lift car and the counterweight assembly to move up and down. The speed measuring mechanism is arranged in the elevator shaft and used for measuring the moving speed of the lift car; the weight measuring mechanism is arranged on the lift car and is used for measuring the load capacity of the lift car; and the counterweight mechanism is connected with the counterweight assembly and is used for adjusting the weight of the counterweight assembly. The elevator speed limiting device aims at solving the problem that in the prior art, major safety accidents are likely to be caused when a car rapidly descends and cannot be braked.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety, and more specifically, to an elevator speed limiting device. Background Art

[0002] An elevator (vertical elevator) is a transportation device for vertically transporting pedestrians or goods, and is widely used in people's daily lives. The elevator is mainly driven by structures such as a traction machine, a traction rope, a guide wheel, and a counterweight rope wheel set, and is usually braked by a speed limiter on the traction machine in case of a failure to ensure the system safety of the elevator.

[0003] Specifically, when the running speed of the car exceeds a predetermined speed, usually when it exceeds 15% of the normal running speed, the speed limiter acts on the safety clamp provided on the traction machine, and brakes the traction rope through hard friction.

[0004] However, in the existing elevator configuration, the weight of the counterweight is usually the weight of the elevator itself plus half of the elevator's rated load weight, which also causes the elevator to usually show a phenomenon of rapid downward fall in case of a failure. When the speed limiter fails, or when the car cannot be braked during a rapid descent, major safety accidents are inevitable. Summary of the Utility Model

[0005] The main object of the utility model is to propose an elevator speed limiting device, aiming to solve the problem of major safety accidents easily caused when the car cannot be braked during a rapid descent in the prior art.

[0006] To solve the above technical problems, an elevator speed limiting device is proposed, including: a car and a counterweight assembly, both of which are slidably arranged in an elevator shaft;

[0007] A traction machine, which is respectively connected to the car and the counterweight assembly, and is used to drive the car and the counterweight assembly to move up and down;

[0008] A speed measuring mechanism, which is arranged in the elevator shaft and is used to measure the moving speed of the car;

[0009] A weight measuring mechanism, which is arranged on the car and is used to measure the load weight of the car;

[0010] A counterweight mechanism, which is connected to the counterweight assembly and is used to adjust the weight of the counterweight assembly.

[0011] In any of the above technical solutions, further, it further includes: a deceleration mechanism, which is arranged at the bottom of the elevator shaft and is used to slow down the descending speed of the car.

[0012] In any of the above technical solutions, further, the counterweight mechanism includes:

[0013] The counterweight box is hollow and fixedly arranged on the counterweight assembly, and is provided with a connecting hole;

[0014] The water pump is communicated with the counterweight box and is used for adjusting the water volume in the counterweight box.

[0015] In any of the above technical solutions, further, the counterweight mechanism further includes:

[0016] The folding pipe assembly has two ends respectively communicated with the counterweight box and the water pump. The folding pipe assembly includes:

[0017] A plurality of rigid pipes, and a hose is provided between each adjacent pair of the rigid pipes. Each of the rigid pipes and each of the hoses are sequentially communicated.

[0018] In any of the above technical solutions, further, the folding pipe assembly further includes:

[0019] A number of limiting components, and one of the limiting components is provided between each adjacent pair of the rigid pipes. The limiting components are used for making each of the rigid pipes overlap with each other vertically when the folding pipe assembly is stacked.

[0020] In any of the above technical solutions, further, the limiting component includes:

[0021] The first limiting member is hinged to the Nth rigid pipe;

[0022] The second limiting member is hinged to the (N + 1)th rigid pipe, and the first limiting member and the second limiting member are hinged to each other. N is an integer greater than or equal to 1.

[0023] In any of the above technical solutions, further, the deceleration mechanism includes:

[0024] A number of connecting ropes all extend to both sides of the car. The first end of each of the connecting ropes is fixedly arranged, and the second end of each of the connecting ropes is connected to the winding mechanism. The winding mechanism is used for adjusting the extended length of each of the connecting ropes;

[0025] The clamping mechanism is arranged between the winding mechanism and the car and is used for clamping each of the connecting ropes.

[0026] In any of the above technical solutions, further, the rotating roller of the winding mechanism is provided with a number of separating members, and the second end of each of the connecting ropes is respectively placed between two adjacent separating members.

[0027] In any of the above technical solutions, further, the clamping mechanism includes:

[0028] The first pair of clamping blocks is fixedly arranged in the elevator shaft;

[0029] A second pair of clamping blocks is movably arranged corresponding to the first pair of clamping blocks, and each of the connecting ropes passes between the first pair of clamping blocks and the second pair of clamping blocks;

[0030] A driving mechanism is connected to the second pair of clamping blocks and is used to drive the second pair of clamping blocks to move;

[0031] The mutually approaching sides of the first pair of clamping blocks and the second pair of clamping blocks are provided with concave-convex patterns.

[0032] In any of the above technical solutions, further, a spring is provided at the first end of the connecting rope.

[0033] The beneficial effects are as follows:

[0034] 1. For the elevator speed limiting device of the present utility model, the running speed of the car in the elevator shaft is measured by the speed measuring mechanism, so as to timely discover the phenomenon of the car falling at an excessive speed, and it is convenient to timely increase the weight of the counterweight assembly through the weight measuring mechanism and the deceleration mechanism, so as to achieve effects such as increasing the falling speed of the car, increasing the speed to zero, and making the speed negative. Under ideal conditions, the car can land smoothly, avoiding danger to the users in the car and reducing property losses;

[0035] 2. For the elevator speed limiting device of the present utility model, the car is assisted to decelerate by the deceleration mechanism at the bottom of the elevator shaft, avoiding the car directly hitting the ground and reducing the harm caused when the car falls at an excessive speed;

[0036] 3. For the elevator speed limiting device of the present utility model, through the combination of the counterweight mechanism and the deceleration mechanism, it can greatly promote the car to land smoothly on the ground and improve the safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a front view three-dimensional structural schematic diagram of an elevator speed limiting device of the present utility model;

[0039] Figure 2 It is a right view three-dimensional structural schematic diagram of an elevator speed limiting device of the present utility model;

[0040] Figure 3 It is a rear view sectional structural schematic diagram of an elevator speed limiting device of the present utility model;

[0041] Figure 4 is Figure 3 The partial enlarged structural schematic diagram at position A in

[0042] The description of the reference numerals in the drawings is as follows:

[0043] 1. Carriage;

[0044] 2. Counterweight assembly;

[0045] 3. Traction machine;

[0046] 4. Counterweight mechanism; 401. Counterweight box; 402. Water pump; 403. Folding pipe assembly; 404. Rigid pipe; 405. Hose; 406. Limit assembly; 407. First limit member; 408. Second limit member;

[0047] 5. Deceleration mechanism; 501. Connecting rope; 502. Winding mechanism; 503. Clamping mechanism; 504. Partition member; 505. First pair of clamping blocks; 506. Second pair of clamping blocks; 507. Driving mechanism; 508. Spring. Detailed implementation manners

[0048] Next, exemplary embodiments according to the present application will be described in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0049] It should be noted that, as shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one" and / or "the" are not specifically singular and may also include plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0050] If there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0051] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0053] The present utility model provides an elevator speed limiting device, which mainly realizes the effect of double speed reduction through the combination of a counterweight mechanism and a deceleration mechanism, and improves the success rate of protecting personnel safety when dealing with the over-speed falling of the car.

[0054] The following will detail an elevator speed limiting device of the present application through the following embodiments.

[0055] In this embodiment, as Figures 1 to 4 shown, the elevator speed limiting device includes: a car 1 and a counterweight assembly 2, both of which are slidably arranged in the elevator shaft;

[0056] A traction machine 3, which is respectively connected to the car 1 and the counterweight assembly 2 and is used to drive the car 1 and the counterweight assembly 2 to move up and down;

[0057] A speed measuring mechanism (not shown in the figure), which is arranged in the elevator shaft and is used to measure the moving speed of the car 1;

[0058] A weight measuring mechanism (not shown in the figure), which is arranged on the car 1 and is used to measure the load weight of the car 1;

[0059] A counterweight mechanism 4, which is connected to the counterweight assembly 2 and is used to adjust the weight of the counterweight assembly 2.

[0060] In this embodiment, it further includes: a speed reduction mechanism 5, which is arranged at the bottom of the elevator shaft and is used to slow down the descending speed of the car 1.

[0061] In this technical solution, the car 1 is slidably arranged up and down on the front side of the elevator shaft, and the counterweight assembly 2 is slidably arranged up and down on the rear side of the elevator shaft. The counterweight assembly 2 is composed of multiple overlapping counterweight blocks. The traction machine 3 is fixed at the top of the elevator shaft. The traction machine 3 is connected to the car 1 and the counterweight assembly 2 respectively through traction ropes. By driving the traction machine 3, the car 1 can be driven to rise while driving the counterweight assembly 2 to descend, and the car 1 can also be driven to descend while driving the counterweight assembly 2 to rise. The speed measurement mechanism (not shown in the figure) is a plurality of opposed light sensors uniformly arranged in the elevator shaft in the vertical direction. The descending speed of the car 1 is calculated by the duration of the car 1 blocking the opposed sensors.

[0062] The weight measurement mechanism (not shown in the figure) refers to the method of measuring the passenger weight in an elevator in the prior art. It can also set one or more weight sensors at the bottom of the car 1 to measure the load weight through the weight sensors; it can also estimate the load weight by counting the number of people in the car 1 and multiplying by the average weight.

[0063] The counterweight mechanism 4 is connected to the counterweight assembly 2 and can fill an appropriate amount of water into the counterweight box 401 fixed on the counterweight assembly 2 as needed to increase the overall weight of the counterweight assembly 2 and the counterweight box 401, or can also draw out an appropriate amount of water from the counterweight box 401 as needed to reduce the overall weight of the counterweight assembly 2 and the counterweight box 401.

[0064] The speed reduction mechanism 5 is arranged at the bottom of the elevator shaft. The fixed position of the connecting rope 501 of the speed reduction mechanism 5 has a certain height from the bottom surface of the elevator shaft. When idle, the connecting ropes 501 of the speed reduction mechanism 5 are in a loose state and do not affect the normal up and down movement of the elevator; when the speed measurement mechanism measures that the descending speed of the car 1 exceeds the predetermined speed, the connecting ropes 501 of the speed reduction mechanism 5 are wound up to a tensioned state, so that the car 1 contacts each connecting rope 501 in advance before hitting the bottom of the elevator shaft, achieving the purpose of excessive buffering.

[0065] During actual use, the counterweight mechanism 4 can first fill an excessive amount of water into the counterweight box 401 to increase the deceleration rate of the car 1, and then draw out a certain amount of water to adjust the running speed of the decelerated car 1.

[0066] In this embodiment, the counterweight mechanism 4 includes:

[0067] The counterweight box 401, which is hollow and fixedly arranged on the counterweight assembly 2 and is provided with a connection hole;

[0068] A water pump 402, which is communicated with the counterweight box 401 and is used to adjust the water volume in the counterweight box 401.

[0069] In this technical solution, the counterweight box 401 is fixed to the rear side of the counterweight assembly 2. A connection hole is provided on the rear side of the counterweight box 401. The water pump 402 is communicated with the counterweight box 401 through a connecting pipe, and the connecting pipe passes through the connection hole and extends to the bottom inside the counterweight box 401, which is convenient for increasing or decreasing the water volume in the counterweight box 401 by controlling the rotation direction of the water pump 402.

[0070] In some technical solutions, a flow meter is provided at a position of the connecting pipe close to the connection hole, which is convenient for accurately calculating the water volume entering and leaving the counterweight box 401.

[0071] In this embodiment, the counterweight mechanism 4 further includes:

[0072] A folding pipe assembly 403, with two ends respectively communicated with the counterweight box 401 and the water pump 402. The folding pipe assembly 403 includes:

[0073] A plurality of rigid pipes 404, and a hose 405 is provided between each adjacent pair of rigid pipes 404. Each rigid pipe 404 and each hose 405 are communicated in sequence.

[0074] In this technical solution, the folding pipe assembly 403 is provided to facilitate ensuring the smoothness of water flow. The top end of the folding pipe assembly 403 is communicated with the connecting pipe, the bottom end of the folding pipe assembly 403 is communicated with the water pump 402, and the other end of the water pump 402 is communicated with a water source. The outer layer of the rigid pipe 404 is set to be rectangular, and the inner layer is set to be circular with the same diameter as the hose 405. The outer layer of the rigid pipe 404 is made of a metal material, and the inner layer of the rigid pipe 404 and the hose 405 are made of a rubber or plastic material. The water pumped by the water pump 402 flows into the counterweight box 401 through each rigid pipe 404, each hose 405 and the connecting pipe.

[0075] During the use process, each rigid pipe 404 and each hose 405 of the folding pipe assembly 403 will be unfolded or contracted and stacked as the counterweight assembly 2 moves up and down. The folding pipe assembly 403 is set as a combination of rigid pipes 404 and hoses 405, which is convenient for subsequently using the limiting component 406 to stack the folding pipe assembly 403 in the same vertical plane when it is contracted. Such a setting is also convenient for the folding pipe assembly 403 to deliver water to the counterweight box 401 when the car 1 is at any position.

[0076] In this embodiment, the folding pipe assembly 403 further includes:

[0077] A number of limiting components 406, and a limiting component 406 is provided between each adjacent pair of rigid pipes 404. The limiting component 406 is used to make each rigid pipe 404 overlap with each other vertically when the folding pipe assembly 403 is stacked.

[0078] In this technical solution, a limiting component 406 is provided to limit the direction of the shrinkage and stacking of the rigid tubes 404, facilitating the stacking of the rigid tubes 404 in the same vertical plane and avoiding the chaos of the folding tube assembly 403.

[0079] In this embodiment, the limiting component 406 includes:

[0080] A first limiting member 407, hinged to the Nth rigid tube 404;

[0081] A second limiting member 408, hinged to the (N + 1)th rigid tube 404, and the first limiting member 407 and the second limiting member 408 are hinged to each other, where N is an integer greater than or equal to 1.

[0082] In this technical solution, both the first limiting member 407 and the second limiting member 408 are in the shape of an H. A limiting component 406 is provided between any two adjacent rigid tubes 404. The upper one of any two adjacent rigid tubes 404 can be called the Nth, and the lower one can be called the (N + 1)th. One end of the first limiting member 407 is hinged to the lower side surface of the upper rigid tube 404, one end of the second limiting member 408 is hinged to the upper side surface of the lower rigid tube 404, and the mutually approaching ends of the first limiting member 407 and the second limiting member 408 are hinged to each other through a pin shaft.

[0083] In some technical solutions, grooves for accommodating the first limiting member 407 and the second limiting member 408 are provided on the mutually approaching side surfaces of two adjacent rigid tubes 404.

[0084] Except for the uppermost rigid tube 404 and the lowermost rigid tube 404 which are only connected to one limiting component 406, the remaining rigid tubes 404 are all connected to two limiting components 406.

[0085] In this embodiment, the deceleration mechanism 5 includes:

[0086] A plurality of connecting ropes 501, all extending to both sides of the car 1. The first ends of the connecting ropes 501 are fixedly arranged, and the second ends of the connecting ropes 501 are connected to a winding mechanism 502, and the winding mechanism 502 is used to adjust the unfolding length of the connecting ropes 501;

[0087] A clamping mechanism 503, arranged between the winding mechanism 502 and the car 1, for clamping the connecting ropes 501.

[0088] In this embodiment, a spring 508 is provided at the first end of the connecting rope 501.

[0089] In this technical solution, the first end refers to the left end, and the second end refers to the right end. The left ends of the connecting ropes 501 are evenly fixed on the upper side of a fixing plate. A spring 508 is connected to the lower side of the fixing plate, and the bottom end of the spring 508 is fixed. The right ends of the connecting ropes 501 are evenly wound around the winding mechanism 502 in the front and back directions. The clamping mechanism 503 is arranged between the winding mechanism 502 and the right side of the car 1.

[0090] When idle, the connecting ropes 501 are laid on the bottom surface of the elevator shaft in a slack state. When the speed measuring mechanism measures that the descending speed of the car 1 exceeds the specified speed, the winding mechanism 502 winds the connecting ropes 501 to make the connecting ropes 501 taut. Then the clamping mechanism 503 is opened to clamp a part of the connecting ropes 501 between the right side of the taut car 1 and the winding mechanism 502. When the car 1 descends and impacts the connecting ropes 501, the left side receives the elastic force of the spring 508, and the right side allows the connecting ropes 501 to slip out between the clamping mechanisms 503. At the same time, in order to cooperate with the connecting ropes 501 to slip out after being impacted, the winding mechanism 502 can be reversely opened after the clamping mechanism 503 clamps the connecting ropes 501, which can not only prevent the winding mechanism 502 from being damaged, but also increase the buffer distance allowed for the connecting ropes 501 to the car 1 to a certain extent.

[0091] In some technical solutions, guide rods for adjusting the running direction of the connecting ropes 501 are provided on the side walls at the bottom of the elevator shaft.

[0092] In this embodiment, the rotating roller of the winding mechanism 502 is provided with a plurality of partition members 504, and the second ends of the connecting ropes 501 are respectively placed between two adjacent partition members 504.

[0093] In this technical solution, the winding mechanism 502 is a roller driven by a motor. The roller is rotatably arranged on the side wall of the elevator shaft. The partition members 504 are circular plates and are coaxially fixed on the roller of the winding mechanism 502 at intervals. Such a setting facilitates the winding and unwinding of the connecting ropes 501 and reduces the influence between them.

[0094] In this embodiment, the clamping mechanism 503 includes:

[0095] A first pair of clamping blocks 505, fixedly arranged in the elevator shaft;

[0096] A second pair of clamping blocks 506, movably arranged corresponding to the first pair of clamping blocks 505, and the connecting ropes 501 pass between the first pair of clamping blocks 505 and the second pair of clamping blocks 506;

[0097] A driving mechanism 507, connected to the second pair of clamping blocks 506, for driving the second pair of clamping blocks 506 to move;

[0098] The mutually approaching sides of the first pair of clamping blocks 505 and the second pair of clamping blocks 506 are provided with concave and convex patterns.

[0099] In this technical solution, the first pair of clamping blocks 505 are fixed on the bottom surface of the elevator shaft, the second pair of clamping blocks 506 are arranged on the upper side of the first pair of clamping blocks 505 in a vertically slidable manner, there is a gap for each connecting rope 501 to pass between the first pair of clamping blocks 505 and the second pair of clamping blocks 506, the driving mechanism 507 is a cylinder arranged on the upper side of the second pair of clamping blocks 506, and the top surface of the first pair of clamping blocks 505 and the bottom surface of the second pair of clamping blocks 506 are provided with mutually adapted concave and convex patterns. When in use, the driving mechanism 507 is activated to drive the second pair of clamping blocks 506 to move downward, so as to clamp and fix the connecting rope 501 and improve the bearing capacity of the tensioned connecting rope 501.

[0100] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the disclosed embodiments.

Claims

1. An elevator speed limiting device, arranged in an elevator shaft of a building, characterized in that: include: The car (1) and the counterweight assembly (2) are both slidably arranged in the elevator shaft; A traction machine (3) is connected to the car (1) and the counterweight assembly (2) respectively, and is used to drive the car (1) and the counterweight assembly (2) to move up and down; A speed measuring mechanism, arranged in the elevator shaft, for measuring the moving speed of the elevator car (1); A weight measuring mechanism, arranged on the car (1) and used to measure the load capacity of the car (1); A counterweight mechanism (4) is connected to the counterweight assembly (2) and is used to adjust the weight of the counterweight assembly (2).

2. The elevator speed limiting device according to claim 1, characterized in that: The counterweight mechanism (4) comprises: The counterweight box (401) is hollow and fixedly mounted on the counterweight assembly (2) and is provided with a connection hole; A water pump (402) is connected to the counterweight box (401) and is used to adjust the amount of water in the counterweight box (401).

3. The elevator speed limiting device according to claim 2, characterized in that: The counterweight mechanism (4) further comprises: The foldable pipe assembly (403) has two ends respectively connected to the counterweight box (401) and the water pump (402), and the foldable pipe assembly (403) comprises: A plurality of hard tubes (404) are provided, and a soft tube (405) is provided between each adjacent hard tube (404), and each hard tube (404) and each soft tube (405) are connected in sequence.

4. The elevator speed limiting device according to claim 3, characterized in that: The folding tube assembly (403) further comprises: A plurality of limiting components (406), each of which is provided between adjacent rigid tubes (404), and the limiting components (406) are used to enable the rigid tubes (404) to overlap each other when the folding tube components (403) are stacked.

5. The elevator speed limiting device according to claim 4, characterized in that: The limiting component (406) comprises: A first stopper (407) is hinged to the Nth hard tube (404); The second limiting member (408) is connected to the N+1th hard tube (404), and the first limiting member (407) and the second limiting member (408) are hingedly connected to each other, and N is an integer greater than or equal to 1.

6. The elevator speed limiting device according to claim 1, characterized in that: Also includes; A speed reduction mechanism (5) is arranged at the bottom of the elevator shaft and is used to reduce the descending speed of the elevator car (1).

7. The elevator speed limiting device according to claim 6, characterized in that: The speed reduction mechanism (5) comprises: A plurality of connecting ropes (501) are extended to both sides of the car (1); a first end of each connecting rope (501) is fixedly arranged, and a second end of each connecting rope (501) is connected to a reeling mechanism (502); and the reeling mechanism (502) is used to adjust the unfolded length of each connecting rope (501); A clamping mechanism (503) is arranged between the winding mechanism (502) and the car (1) and is used for clamping each of the connecting ropes (501).

8. The elevator speed limiting device according to claim 7, characterized in that: The rotating roller of the winding mechanism (502) is provided with a plurality of partitions (504), and the second end of each of the connecting ropes (501) is respectively placed between two adjacent partitions (504).

9. The elevator speed limiting device according to claim 7, characterized in that: The clamping mechanism (503) comprises: A first pair of clamping blocks (505) is fixedly arranged in the elevator shaft; A second pair of clamping blocks (506) is movably arranged corresponding to the first pair of clamping blocks (505), and each of the connecting ropes (501) passes between the first pair of clamping blocks (505) and the second pair of clamping blocks (506); A driving mechanism (507), connected to the second pair of clamping blocks (506), and used for driving the second pair of clamping blocks (506) to move; The sides of the first pair of clamping blocks (505) and the second pair of clamping blocks (506) that are close to each other are provided with concave and convex patterns.

10. The elevator speed limiting device according to claim 7, characterized in that: The first end of the connecting rope (501) is provided with a spring (508).

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