A chain breakage protection device and a cage hoisting system

Abstract

The utility model discloses a kind of chain break protection device and cage lifting system, chain break protection device includes multiple connecting mechanisms, multiple embrace and clamp mechanism and monitoring mechanism, each described connecting mechanism includes connecting shaft and weight, the bottom of the connecting shaft is fixedly connected with the weight, and the diameter of the connecting shaft is less than the diameter of the weight, the upper end of each described connecting shaft is slidably penetrated cage, and with the lower end of each chain one-to-one corresponding fixed connection;Each described embrace and clamp mechanism is connected with cage, and is used for clamping or loosening rack;The monitoring mechanism is electrically connected with each described embrace and clamp mechanism, for monitoring whether each described weight falls down.The utility model has the beneficial effects that: the present chain break protection device can monitor whether chain is broken, and when chain is broken, embrace and clamp mechanism can be quickly started to embrace rack, avoid cage to continue to fall down, cause unpredictable accident.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a chain breakage protection device and a cage lifting system. Background Technology

[0002] A lifting platform is a device capable of raising and lowering goods. Cage-type lifting platforms are particularly prevalent in manufacturing. In production lines, cage-type lifting platforms typically use roller conveyors or other types of conveyors to feed products into the cage. The cage then rises under the action of a specific mechanism, transporting the products to the desired location. The cage serves to support the load and is the lifting mechanism's supporting function. Existing cage-type lifting platform structures (such as the novel cage-type lifting platform disclosed in application number 201920050268.4) generally drive the cage's movement by the up-and-down movement of a chain. However, in actual use, excessive chain stress can lead to chain breakage over time, causing unforeseen accidents. Therefore, there is an urgent need to design a chain breakage protection device that can monitor for chain breakage and, if a chain breaks, quickly activate a clamping mechanism to hold the track and prevent the cage from falling further. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a chain breakage protection device and a cage lifting system to solve the technical problem in the prior art that the chain is subjected to excessive force and may break after prolonged use, causing unpredictable accidents.

[0004] To achieve the above technical objectives, the present invention provides a chain breakage protection device, comprising: Multiple connecting mechanisms, each including a connecting shaft and a counterweight, with the bottom of the connecting shaft fixedly connected to the counterweight, and the diameter of the connecting shaft being smaller than the diameter of the counterweight. The upper end of each connecting shaft slides through the cage and is fixedly connected to the lower end of each chain. Multiple clamping mechanisms are connected to the cage and used to clamp or release the frame; The monitoring mechanism is electrically connected to each of the clamping mechanisms and is used to monitor whether each of the weights is falling and to control each of the clamping mechanisms to perform clamping actions based on the falling signal.

[0005] Furthermore, each of the clamping mechanisms includes two clamping wheels and a clamping drive assembly. The two clamping wheels are arranged opposite each other on both sides of the track of the frame. The clamping drive assembly is connected to the cage and the two clamping wheels and is used to drive the two clamping wheels to clamp or release the corresponding track together.

[0006] Furthermore, each of the clamping mechanisms also includes a support base, which is fixedly connected to the cage, and the clamping drive assembly is connected to the support base.

[0007] Furthermore, the clamping drive assembly includes a slider, two racks, two rotating shafts, two gears, and a telescopic drive component. The slider is slidably connected to the support base and can move up and down along the support base. The two racks are opposite to each other and vertically arranged, and are both fixedly connected to the slider. The two rotating shafts are opposite to each other and horizontally arranged outside the two racks. One end of each rotating shaft is rotatably connected to the support base, and the other end of each rotating shaft is eccentrically fixedly connected to the two clamping wheels. The two gears are coaxially fixedly sleeved on the two rotating shafts and mesh with the two racks. The fixed end of the telescopic drive component is fixedly connected to the support base, and the output end of the telescopic drive component is fixedly connected to the slider for driving the slider to move up and down.

[0008] Furthermore, each of the clamping mechanisms also includes multiple limiting wheels, each of which is rotatably connected to the support base and rolls against both sides of the track of the frame.

[0009] Furthermore, the monitoring mechanism includes multiple sensors and a controller. Each sensor is positioned below each of the weights and is fixedly connected to the cage to monitor whether the weights are falling. The controller is electrically connected to each sensor and each clamping mechanism to receive the falling signals monitored by each sensor and to control each clamping mechanism to perform clamping actions based on the falling signals.

[0010] Furthermore, the controller is electrically connected to each of the telescopic drive components, and controls the output ends of each of the telescopic drive components to shorten synchronously according to the falling signal, so that the two clamping wheels of each clamping mechanism clamp each track together in a one-to-one correspondence.

[0011] On the other hand, this utility model also provides a cage lifting system, including a frame body, a cage body, a lifting mechanism, and the aforementioned chain breakage protection device. The cage body is slidably connected to the frame body. The lifting mechanism includes multiple chain bodies and chain drive components. The chain drive components are connected to the upper ends of each chain body and are used to drive each chain body to move up and down synchronously. The upper ends of each connecting shaft slide through the cage body and are fixedly connected to the lower ends of each chain body. Each clamping mechanism is connected to the cage body and is used to clamp or release the frame body.

[0012] Furthermore, the cage body has multiple through holes that extend vertically, and the upper end of each connecting shaft slides through each of the through holes.

[0013] Furthermore, the chain drive assembly includes a main shaft, multiple drive sprockets, multiple driven sprockets, a counterweight, and a rotation drive component. The main shaft is horizontally positioned and rotatably connected to the top of the frame body. Each drive sprocket is spaced apart along the length of the main shaft and is coaxially fixedly connected to it. Each driven sprocket is correspondingly positioned to the side of each drive sprocket and rotatably connected to the frame body. Each chain body is correspondingly wound around each drive sprocket and driven sprocket, so that each chain... The main body consists of a first vertical segment, a horizontal segment, and a second vertical segment connected in sequence. The upper end of each connecting shaft is fixedly connected to the lower end of the first vertical segment of each chain body. The counterweight is slidably connected to the frame body and can move up and down along the frame body. The counterweight is also fixedly connected to the lower end of the second vertical segment of each chain body. The fixed end of the rotation drive is fixedly connected to the top of the frame body, and the output end of the rotation drive is coaxially fixedly connected to one end of the main shaft to drive the main shaft to rotate.

[0014] Compared with the prior art, the beneficial effects of this utility model include: during use, the up-and-down movement of the chain drives the lifting of the cage. If the chain breaks, the connecting shaft and the counterweight will fall. The monitoring mechanism can monitor whether each counterweight is falling. When any counterweight falls, it will be detected by the monitoring mechanism. The monitoring mechanism will control each clamping mechanism to perform clamping action according to the falling signal. Each clamping mechanism can clamp the frame to prevent the cage from falling further. This chain breakage protection device can monitor whether the chain is broken, and when the chain breaks, it can quickly activate the clamping mechanism to clamp the frame and prevent the cage from falling further, causing unforeseen accidents. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a cage lifting system provided by this utility model; Figure 2 This is a three-dimensional structural diagram of a chain breakage protection device, a cage, and a chain assembly provided by this utility model. Figure 3 This is a schematic diagram of the structure of a chain breakage protection device, a cage, and a chain assembly provided by this utility model; Figure 4 This is a three-dimensional structural diagram of the clamping mechanism provided by this utility model; Figure 5 This is a three-dimensional structural diagram of the clamping mechanism provided by this utility model from another perspective; Figure 6 yes Figure 3 Enlarged view of point A in the image; In the diagram: 100 - connecting mechanism, 110 - connecting shaft, 120 - counterweight, 200 - clamping mechanism, 210 - clamping wheel, 220 - clamping drive assembly, 221 - slider, 222 - rack, 223 - rotating shaft, 224 - gear, 225 - telescopic drive component, 230 - support base, 231 - slide groove, 240 - limit wheel, 300 - monitoring mechanism, 310 - sensor, 400 - frame body, 500 - cage body, 600 - lifting mechanism, 610 - chain body, 620 - chain drive assembly, 621 - main shaft, 622 - driving sprocket, 623 - driven sprocket, 624 - counterweight, 625 - rotation drive component. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0017] This utility model provides a chain breakage protection device, the structure of which is as follows: Figure 2 - Figure 6 As shown, the system includes multiple connecting mechanisms 100, multiple clamping mechanisms 200, and a monitoring mechanism 300. Each connecting mechanism 100 includes a connecting shaft 110 and a counterweight 120. The bottom of the connecting shaft 110 is fixedly connected to the counterweight 120, and the diameter of the connecting shaft 110 is smaller than the diameter of the counterweight 120. The upper end of each connecting shaft 110 slides through the cage and is fixedly connected to the lower end of each chain. Each clamping mechanism 200 is connected to the cage and is used to clamp or release the frame. The monitoring mechanism 300 is electrically connected to each clamping mechanism 200 and is used to monitor whether each counterweight 120 is falling, and to control each clamping mechanism 200 to perform clamping action according to the falling signal.

[0018] In use, the up-and-down movement of the chain drives the lifting and lowering of the cage. If the chain breaks, the connecting shaft 110 and the counterweight 120 will fall. The monitoring mechanism 300 can monitor whether each counterweight 120 is falling. When any counterweight 120 falls, it will be detected by the monitoring mechanism 300. The monitoring mechanism 300 will control each clamping mechanism 200 to perform clamping action according to the falling signal. Each clamping mechanism 200 can clamp the frame to prevent the cage from falling further. This chain breakage protection device can monitor whether the chain is broken, and when the chain breaks, it can quickly activate the clamping mechanism 200 to clamp the frame and prevent the cage from falling further, causing unforeseen accidents.

[0019] As a preferred embodiment, please refer to Figure 3 and Figure 4 Each clamping mechanism 200 includes two clamping wheels 210 and a clamping drive assembly 220. The two clamping wheels 210 are arranged opposite each other on both sides of the track of the frame. The clamping drive assembly 220 connects the cage and the two clamping wheels 210 and is used to drive the two clamping wheels 210 to clamp or release the corresponding track together. When the monitoring mechanism 300 detects a falling signal, the monitoring mechanism 300 will control the operation of each clamping drive assembly 220. The clamping drive assembly 220 can drive the two clamping wheels 210 to clamp the corresponding track together to prevent the cage from falling further.

[0020] As a preferred embodiment, please refer to Figure 3 and Figure 4 Each of the clamping mechanisms 200 also includes a support base 230, which is fixedly connected to the cage. The clamping drive assembly 220 is connected to the support base 230, and the support base 230 can support the clamping drive assembly 220 to realize the connection between the clamping drive assembly 220 and the cage.

[0021] As a preferred embodiment, please refer to Figure 4 and Figure 5The clamping drive assembly 220 includes a slider 221, two racks 222, two rotating shafts 223, two gears 224, and a telescopic drive component 225. The slider 221 is slidably connected to the support base 230 and can move up and down along the support base 230. The two racks 222 are opposite to each other and vertically arranged, and are both fixedly connected to the slider 221. The two rotating shafts 223 are opposite to each other and horizontally arranged outside the two racks 222. One end of each rotating shaft 223 is rotatably connected to the support base 230, and the other end of each rotating shaft 223 is eccentrically fixedly connected to the two clamping wheels 210. The two gears 224 are coaxially fixedly sleeved on the two rotating shafts 223 and mesh with the two racks 222. The fixed end of the telescopic drive component 225 is fixedly connected to the support base 230. Next, the output end of the telescopic drive component 225 is fixedly connected to the slider 221, and is used to drive the slider 221 to move up and down. When the monitoring mechanism 300 detects a falling signal, the monitoring mechanism 300 will control the output ends of each telescopic drive component 225 to shorten. When the output ends of the telescopic drive components 225 shorten, they will drive the slider 221 to move upward, thereby driving the two racks 222 to move upward. Since the two gears 224 mesh with the two racks 222 one-to-one, according to the transmission principle of the racks 222 and the gears 224, when the two racks 222 move upward, the two gears 224 will rotate in opposite directions, thereby driving the two clamping wheels 210 to rotate in opposite directions via the corresponding rotating shaft 223, so that the wheel surfaces of the two clamping wheels 210 can press against the track to achieve clamping.

[0022] As a preferred embodiment, please refer to Figure 4 and Figure 5 The support base 230 has a vertically extending groove 231, and the slider 221 is slidably connected to the groove 231. The groove 231 can guide the movement of the slider 221.

[0023] As a preferred embodiment, please refer to Figure 3 and Figure 4 Each of the clamping mechanisms 200 also includes multiple limiting wheels 240, each of the limiting wheels 240 being rotatably connected to the support base 230 and rolling against both sides of the track of the frame, thereby enabling the entire clamping mechanism 200 to move along the track, preventing the entire clamping mechanism 200 from shifting and improving the stability of the entire clamping mechanism 200 moving up and down.

[0024] As a preferred embodiment, please refer to Figure 3 and Figure 6The monitoring mechanism 300 includes multiple sensors 310 and a controller. Each sensor 310 is positioned below each of the weights 120 and fixedly connected to the cage to monitor whether the weights 120 are falling. The controller is electrically connected to each sensor 310 and each clamping mechanism 200 to receive the falling signals detected by each sensor 310 and control each clamping mechanism 200 to perform clamping actions based on the falling signals. If the chain breaks, the connecting shaft 110 and the weights 120 will fall. Each sensor 310 can monitor whether each weight 120 is falling. When any weight 120 falls, it will be detected by the corresponding sensor 310, and the controller will receive the signal. Each of the sensors 310 monitors the fall signal and controls the output end of each of the telescopic drive members 225 to shorten according to the fall signal. When the output end of the telescopic drive member 225 shortens, it drives the slider 221 to move upward, which in turn drives the two racks 222 to move upward. Since the two gears 224 mesh with the two racks 222 in a one-to-one correspondence, according to the transmission principle of the racks 222 and the gears 224, when the two racks 222 move upward, the two gears 224 will rotate in opposite directions. This can drive the two clamping wheels 210 to rotate in opposite directions via the corresponding rotating shaft 223, so that the wheel surfaces of the two clamping wheels 210 can press against the track to achieve clamping and prevent the cage from continuing to fall and causing unpredictable accidents.

[0025] As a preferred embodiment, please refer to Figure 6 One end of the sensor 310 is located directly below the hammer 120. When the hammer 120 falls, it will hit one end of the sensor 310, and the sensor 310 will retract to generate a signal. The signal is transmitted to the controller to control the telescopic drive 225 to start.

[0026] In a preferred embodiment, the controller is electrically connected to each of the telescopic drive members 225 and controls the output ends of each telescopic drive member 225 to shorten synchronously according to the falling signal, so that the two clamping wheels 210 of each clamping mechanism 200 clamp each track together in a one-to-one correspondence. When the output end of the telescopic drive member 225 shortens, it drives the slider 221 to move upward, thereby driving the two racks 222 to move upward. Since the two gears 224 mesh with the two racks 222 in a one-to-one correspondence, according to the transmission principle of the racks 222 and the gears 224, when the two racks 222 move upward, the two gears 224 will rotate in opposite directions, thereby driving the two clamping wheels 210 to rotate in opposite directions via the corresponding rotating shaft 223, so that the wheel surfaces of the two clamping wheels 210 can press against the track to achieve clamping.

[0027] Please refer to Figure 1 - Figure 3 Based on the aforementioned chain breakage protection device, this utility model also provides a cage lifting system, including a frame body 400, a cage body 500, a lifting mechanism 600, and the aforementioned chain breakage protection device. The cage body 500 is slidably connected to the frame body 400. The lifting mechanism 600 includes multiple chain bodies 610 and a chain drive assembly 620. The chain drive assembly 620 is connected to the upper end of each chain body 610 and is used to drive each chain body 610 to move up and down synchronously. The upper end of each connecting shaft 110 slides through the cage body 500 and is fixedly connected to the lower end of each chain body 610. Each clamping mechanism 200 is connected to the lower end of each chain body 610. The cage body 500 is connected and used to clamp or release the frame body 400. When the chain drive assembly 620 drives each chain body 610 to move up and down, since the diameter of the connecting shaft 110 is smaller than the diameter of the counterweight 120, the counterweight 120 will not slide through the cage body 500, thus forming a limit. Therefore, the cage body 500 can be supported by the counterweight 120. When the chain body 610 moves up and down, it will drive the cage body 500 to move up and down through the counterweight 120. And when the chain body 610 breaks, the connecting shaft 110 and the counterweight 120 can slide through the cage body 500 and fall.

[0028] In a preferred embodiment, the cage body 500 has a plurality of through holes that extend vertically. The upper end of each of the connecting shafts 110 slides through each of the through holes. Since the diameter of the connecting shaft 110 is smaller than the diameter of the counterweight 120, that is, the diameter of the through hole is smaller than the diameter of the counterweight 120, the counterweight 120 can be used to form a limit.

[0029] As a preferred embodiment, please refer to Figure 1The chain drive assembly 620 includes a main shaft 621, multiple drive sprockets 622, multiple driven sprockets 623, a counterweight 624, and a rotation drive component 625. The main shaft 621 is horizontally arranged and rotatably connected to the top of the frame body 400. Each drive sprocket 622 is spaced apart along the length of the main shaft 621 and is coaxially fixedly connected to the main shaft 621. Each driven sprocket 623 is correspondingly arranged to the side of each drive sprocket 622 and is rotatably connected to the frame body 400. Each chain body 610 is correspondingly wound around the chain. Each of the driving sprockets 622 and driven sprockets 623 forms a first vertical segment, a horizontal segment, and a second vertical segment of each chain body 610 in sequence. The upper end of each connecting shaft 110 is fixedly connected to the lower end of the first vertical segment of each chain body 610. The counterweight 624 is slidably connected to the frame body 400 and can move up and down along the frame body 400. The counterweight 624 is also fixedly connected to the lower end of the second vertical segment of each chain body 610. The fixed end of the rotation drive 625 is connected to the frame body 400. The top is fixedly connected, and the output end of the rotation drive 625 is coaxially fixedly connected to one end of the main shaft 621 for driving the main shaft 621 to rotate. The output end of the rotation drive 625 can rotate in the forward or reverse direction to drive the main shaft 621 to rotate in the forward or reverse direction, thereby driving each of the driving sprockets 622 to rotate synchronously in the forward or reverse direction. Then, through the transmission action of each of the chain bodies 610, each of the driven sprockets 623 can be driven to rotate in the forward or reverse direction. When each of the driving sprockets 622 rotates in the forward direction, the first vertical section of the chain body 610 will move upward. When the cage body 500 moves upward, the second vertical segment of the chain body 610 moves downward, and the counterweight 624 moves downward, thereby driving the cage body 500 upward. When each of the drive sprockets 622 rotates in opposite directions, the first vertical segment of the chain body 610 moves downward, the cage body 500 moves downward, the second vertical segment of the chain body 610 moves upward, and the counterweight 624 moves upward, thereby driving the cage body 500 downward. This chain drive structure can achieve efficient driving of the cage and has a simpler drive structure.

[0030] In a preferred embodiment, the rotation drive 625 can be directly connected to the main shaft 621 using a suitable type of motor, or it can be indirectly connected to the main shaft 621 using a transmission assembly.

[0031] To better understand this utility model, the following is combined with... Figure 1 - Figure 6 The working principle of the technical solution of this utility model will be described in detail below: In use, the output end of the rotation drive 625 rotates in either the forward or reverse direction, driving the main shaft 621 to rotate in either the forward or reverse direction. This, in turn, drives each of the driving sprockets 622 to rotate synchronously in either the forward or reverse direction. Through the transmission action of each chain body 610, each of the driven sprockets 623 can rotate in either the forward or reverse direction. When each of the driving sprockets 622 rotates in the forward direction, the first vertical section of the chain body 610 moves upward. Since the diameter of the connecting shaft 110 is smaller than the diameter of the counterweight 120, the counterweight 120 will not slide through the cage body 500, thus creating a limit. Therefore, it can be driven by each... The weights 120 support the cage body 500. When the first vertical section of the chain body 610 moves upward, the weights 120 drive the cage body 500 upward, the second vertical section of the chain body 610 moves downward, and the counterweight 624 moves downward, thus driving the cage body 500 upward. When the drive sprockets 622 rotate in the opposite direction, the first vertical section of the chain body 610 moves downward, the cage body 500 moves downward, the second vertical section of the chain body 610 moves upward, and the counterweight 624 moves upward, thus driving the cage body 500 upward. If the chain body 610 breaks during the downward drive of body 500, the connecting shaft 110 and the counterweight 120 will fall. Each sensor 310 can monitor whether each counterweight 120 is falling. When any counterweight 120 falls, it will be detected by the corresponding sensor 310. The controller will receive the falling signals detected by each sensor 310 and control the output ends of each telescopic drive member 225 to shorten based on the falling signals. When the output ends of the telescopic drive member 225 shorten, it will drive the slider 221 to move upward, thereby driving the two racks 222 to move upward. The gear 224 meshes with the two racks 222 in a one-to-one correspondence. According to the transmission principle of the racks 222 and the gears 224, when the two racks 222 move upward, the two gears 224 will rotate in opposite directions. This will drive the two clamping wheels 210 to rotate in opposite directions via the corresponding rotating shaft 223, so that the wheel surfaces of the two clamping wheels 210 can press against the track to achieve clamping and prevent the cage from continuing to fall. This chain breakage protection device can monitor whether the chain is broken, and when the chain breaks, it can quickly activate the clamping mechanism 200 to clamp the frame and prevent the cage from continuing to fall and causing unforeseen accidents.

[0032] The chain breakage protection device and cage lifting system provided by this utility model have the following beneficial effects: (1) Since the diameter of the connecting shaft 110 is smaller than the diameter of the weight 120, the weight 120 will not slide through the cage body 500 and can form a limit, so that the cage body 500 can be supported by the weight 120. When the chain body 610 moves up and down, the cage body 500 will be driven to move up and down by the weight 120. And when the chain body 610 breaks, the connecting shaft 110 and the weight 120 can slide through the cage body 500 and fall. (2) When each of the driving sprockets 622 rotates in the forward direction, the first vertical section of the chain body 610 moves upward, the cage body 500 moves upward, the second vertical section of the chain body 610 moves downward, and the counterweight 624 moves downward, thereby driving the cage body 500 upward. When each of the driving sprockets 622 rotates in the reverse direction, the first vertical section of the chain body 610 moves downward, the cage body 500 moves downward, the second vertical section of the chain body 610 moves upward, and the counterweight 624 moves upward, thereby driving the cage body 500 downward. This chain drive structure can achieve efficient driving of the cage, and the drive structure is simpler. (3) This chain breakage protection device can monitor whether the chain is broken, and when the chain breaks, the clamping mechanism 200 can be activated quickly to clamp the frame and prevent the cage from falling further and causing unforeseen accidents.

[0033] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A chain breakage protection device, characterized in that, include: Multiple connecting mechanisms, each including a connecting shaft and a counterweight, with the bottom of the connecting shaft fixedly connected to the counterweight, and the diameter of the connecting shaft being smaller than the diameter of the counterweight. The upper end of each connecting shaft slides through the cage and is fixedly connected to the lower end of each chain. Multiple clamping mechanisms are connected to the cage and used to clamp or release the frame; The monitoring mechanism is electrically connected to each of the clamping mechanisms and is used to monitor whether each of the weights is falling and to control each of the clamping mechanisms to perform clamping actions based on the falling signal.

2. The chain breakage protection device according to claim 1, characterized in that, Each of the clamping mechanisms includes two clamping wheels and a clamping drive assembly. The two clamping wheels are arranged opposite each other on both sides of the track of the frame. The clamping drive assembly is connected to the cage and the two clamping wheels and is used to drive the two clamping wheels to clamp or release the corresponding track together.

3. The chain breakage protection device according to claim 2, characterized in that, Each of the clamping mechanisms also includes a support base, which is fixedly connected to the cage, and the clamping drive assembly is connected to the support base.

4. The chain breakage protection device according to claim 3, characterized in that, The clamping drive assembly includes a slider, two racks, two rotating shafts, two gears, and a telescopic drive component. The slider is slidably connected to the support base and can move up and down along the support base. The two racks are opposite to each other and vertically arranged, and are both fixedly connected to the slider. The two rotating shafts are opposite to each other and horizontally arranged outside the two racks. One end of each rotating shaft is rotatably connected to the support base, and the other end of each rotating shaft is eccentrically fixedly connected to the two clamping wheels. The two gears are coaxially fixedly sleeved on the two rotating shafts and mesh with the two racks. The fixed end of the telescopic drive component is fixedly connected to the support base, and the output end of the telescopic drive component is fixedly connected to the slider for driving the slider to move up and down.

5. The chain breakage protection device according to claim 3, characterized in that, Each of the clamping mechanisms also includes multiple limiting wheels, each of which is rotatably connected to the support base and rolls against both sides of the track of the frame.

6. The chain breakage protection device according to claim 4, characterized in that, The monitoring mechanism includes multiple sensors and a controller. Each sensor is positioned below each of the weights and is fixedly connected to the cage to monitor whether the weights are falling. The controller is electrically connected to each sensor and each clamping mechanism to receive the falling signals monitored by each sensor and to control each clamping mechanism to perform clamping actions based on the falling signals.

7. The chain breakage protection device according to claim 6, characterized in that, The controller is electrically connected to each of the telescopic drive components and controls the output ends of each of the telescopic drive components to shorten synchronously according to the falling signal, so that the two clamping wheels of each clamping mechanism clamp each track together in a one-to-one correspondence.

8. A cage lifting system, characterized in that, The device includes a frame body, a cage body, a lifting mechanism, and a chain breakage protection device as described in any one of claims 1-7. The cage body is slidably connected to the frame body. The lifting mechanism includes multiple chain bodies and a chain drive assembly. The chain drive assembly is connected to the upper end of each chain body and is used to drive each chain body to move up and down synchronously. The upper end of each connecting shaft slides through the cage body and is fixedly connected to the lower end of each chain body. Each clamping mechanism is connected to the cage body and is used to clamp or release the frame body.

9. A cage lifting system according to claim 8, characterized in that, The cage body has multiple through holes that extend vertically, and the upper end of each connecting shaft slides through each of the through holes.

10. A cage lifting system according to claim 8, characterized in that, The chain drive assembly includes a main shaft, multiple drive sprockets, multiple driven sprockets, a counterweight, and a rotation drive component. The main shaft is horizontally positioned and rotatably connected to the top of the frame body. Each drive sprocket is spaced apart along the length of the main shaft and coaxially fixedly connected to it. Each driven sprocket is correspondingly positioned to the side of each drive sprocket and rotatably connected to the frame body. Each chain body is correspondingly wound around each drive sprocket and driven sprocket, so that each chain body... The chain comprises a first vertical segment, a horizontal segment, and a second vertical segment connected in sequence. The upper end of each connecting shaft is fixedly connected to the lower end of the first vertical segment of each chain body. The counterweight is slidably connected to the frame body and can move up and down along the frame body. The counterweight is also fixedly connected to the lower end of the second vertical segment of each chain body. The fixed end of the rotation drive is fixedly connected to the top of the frame body, and the output end of the rotation drive is coaxially fixedly connected to one end of the main shaft to drive the main shaft to rotate.

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