Mine vertical shaft hoisting limiting device

Abstract

The present application relates to the technical field of vertical shaft hoisting limiting device, and discloses a mine vertical shaft hoisting limiting device, which comprises a hoisting limiting unit and a loading unit; the hoisting limiting unit comprises a guide rail assembly, a jam sensing unit and a hydraulic correction unit; when local deformation and bending occur in one of the monomer guide rails in the guide rail assembly, the bending position of the monomer guide rail is detected by the jam sensing unit to avoid the occurrence of jamming. By setting the jam sensing unit and the hydraulic correction unit, timely detection and automatic correction can be performed when local deformation and bending occur in the guide rail, the risk of jamming is inhibited, the jamming accidents caused by guide rail deformation are fundamentally eliminated, and the operation safety of the mine vertical shaft hoisting device is greatly improved, and personnel casualties and equipment damage are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of vertical shaft hoisting limit device technology, and more specifically, to a mining vertical shaft hoisting limit device. Background Technology

[0002] Mining shaft hoisting systems are indispensable core equipment in deep-well mining scenarios such as coal mines and metal mines. They directly undertake critical tasks such as personnel transportation and ore transfer. Their safe and stable operation is not only a prerequisite for ensuring mine production efficiency, but also a core line of defense for protecting miners' lives. However, in actual working conditions, guide rail jamming has become one of the most frequent high-risk failures of this type of device. Once it occurs, it can directly lead to safety accidents, catastrophic equipment damage, and complete production interruption, posing a serious threat to the lives and property of miners.

[0003] The formation of guide rail jamming is influenced by multiple complex factors. On the one hand, the complex geological conditions in mines and geological subsidence can easily cause overall deformation or local bending of the guide rail, resulting in the deviation between the guide shoe's running trajectory and the actual direction of the guide rail exceeding the design clearance, thus forming hard friction jamming. On the other hand, the temperature and humidity inside the mine fluctuate drastically, especially the drastic temperature changes, which cause the guide rail material to expand and contract. If the expansion and contraction exceeds the range of the compensation device, it will cause the guide rail joint to jam and local bulges, forming a stepped jamming point. At the same time, the long-term vibration of the guide rail mounting bolts, the initial deviation during the installation stage, and the pressure caused by the deformation of the well wall can also cause local bulges or depressions in the guide rail, forming a potential jamming risk.

[0004] Currently, most existing mine shaft hoisting systems rely on periodic manual inspections or reactive maintenance after malfunctions. This approach is not only inefficient and time-consuming, but also makes it difficult to prevent sudden jamming accidents. Once jamming occurs, the resistance of the car's movement increases dramatically. The continuous traction force output by the winch will subject the wire rope to tension far exceeding its design threshold, easily leading to fatigue fracture. This could ultimately cause the car to fall freely, damaging the underground tracks and equipment, or even causing the shaft walls to collapse, resulting in incalculable casualties and economic losses. Summary of the Invention

[0005] This invention provides a mine shaft hoisting limit device, which solves the technical problem in related technologies where, when the guide rail of the shaft hoisting device becomes stuck, the running resistance of the car increases sharply. The continuous traction force output by the winch will cause the wire rope to bear a tension far exceeding the design threshold, which can easily lead to fatigue fracture of the wire rope. Ultimately, this may cause the car to fall freely, destroying the underground rails and equipment, or even causing the shaft wall to collapse, resulting in incalculable casualties and economic losses.

[0006] This invention provides a mine vertical shaft hoisting and limiting device, including a hoisting and limiting unit and a loading unit. The hoisting and limiting unit is disposed on both sides of the loading unit. The hoisting and limiting unit includes a guide rail assembly, a jamming sensing unit, and a hydraulic correction unit. The guide rail assembly is composed of several individual guide rails. When one group of individual guide rails in the guide rail assembly undergoes local deformation and bending, the jamming sensing unit detects the bent portion of the individual guide rail. When the bending range exceeds the stretching range of the jamming sensing unit, the jamming sensing unit drives the hydraulic correction unit to hydraulically correct the individual guide rail to eliminate the bending, thereby preventing jamming.

[0007] As a further optimization of the present invention, the blocking sensing unit includes two sets of rotating shafts connected to the middle of the single-unit guide rail by bearings. Each rotating shaft is equipped with a winding wheel, and a connecting rope is wound around the winding wheel. One end of the connecting rope is fixedly connected to the winding wheel, and the other end of the connecting rope is connected to a fixing block, which is fixedly connected to the end of the single-unit guide rail. A torsion spring is provided on the outside of the rotating shaft.

[0008] As a further optimization of the present invention, a cam is also installed on the rotating shaft, and multiple sets of protrusions are provided on the cam. A fixing plate is provided on the side of the two sets of cams that are close to each other, and the fixing plate is fixedly connected to the single guide rail. A pressure sensor is installed on the fixing plate.

[0009] As a further optimization of the present invention, a pressure plate is provided on the side of the fixed plate near the cam, and the pressure plate is in contact with the outer surface of the cam. A pressure block is installed on the pressure plate. The pressure sensor and the pressure block are located on the same axis. Guide posts are slidably connected to both sides inside the fixed plate, and the guide posts are fixedly connected to the pressure plate. A first spring is provided on the outside of the guide posts.

[0010] As a further optimization of the present invention, the pressure sensor and the pressure block are provided with a bellows, and the two ends of the bellows are fixedly connected to the fixing plate and the pressure plate, respectively.

[0011] As a further optimization of the present invention, the single guide rail is symmetrically equipped with pads, and multiple sets of threading limit frames are installed on the pads, the threading limit frames being disposed outside the connecting rope.

[0012] As a further optimization of the present invention, the single guide rail is divided into upper and lower correction areas. Each correction area has a hydraulic correction unit on both sides. The hydraulic correction unit includes correction plates respectively disposed on both sides of the upper and lower correction areas. Hydraulic cylinders are symmetrically disposed on the correction plates, and the output shaft of the hydraulic cylinders is fixedly connected to the correction plates.

[0013] As a further optimization of the present invention, the correction plate is arranged in an L-shape, and the shape of the side of the correction plate that contacts the single guide rail is adapted to the shape of the correction plate.

[0014] As a further optimization of the present invention, the loading unit includes a loading box and a connecting frame installed on the loading box. Guide shoe units are provided on both sides of the connecting frame. The guide shoe unit includes a connecting seat symmetrically installed on both sides of the connecting frame. A bracket is installed on the connecting seat. The left, right and middle parts of the connecting seat are rotatably connected to a swing arm through a rotating shaft, and a rubber wheel is rotatably connected to the swing arm through a bearing.

[0015] As a further optimization of the present invention, the swing arm has a sliding groove inside, and a sliding rod is slidably connected inside the sliding groove. Multiple sets of the sliding rods are all mounted on the bracket. A sliding block is slidably connected to the outside of the sliding rod, and a second spring is installed between the sliding block and the sliding rod.

[0016] The beneficial effects of this invention are as follows: By incorporating a jamming sensing unit and a hydraulic correction unit, this invention can promptly detect and automatically correct local deformation and bending of the guide rail, suppressing the risk of jamming and fundamentally eliminating jamming accidents caused by guide rail deformation. This significantly improves the operational safety of the mine vertical shaft hoisting device and effectively avoids personnel casualties and equipment damage. Furthermore, the jamming sensing unit can monitor the deformation of individual guide rails in real time and continuously. Once the bending amount exceeds a preset threshold, it immediately drives the hydraulic correction unit for precise hydraulic correction, achieving a leap from passive maintenance to proactive prevention and improving the reliability of equipment operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure of the present invention; Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 4 This is a three-dimensional structural diagram of the lifting and limiting unit of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the card-stop sensing unit of the present invention; Figure 6 This is a partial cross-sectional three-dimensional structural schematic diagram of the card-stop sensing unit of the present invention; Figure 7 This is a schematic diagram showing the connection relationship between the lifting limiting unit and the guide shoe unit of the present invention; Figure 8 This is a schematic diagram showing the positional relationship between the single guide rail and the hydraulic correction unit of the present invention; Figure 9 This is a three-dimensional structural diagram of the guide shoe unit of the present invention.

[0018] In the diagram: 100, vertical shaft working platform; 200, hoist; 300, hoisting limit unit; 310, jamming sensing unit; 311, single guide rail; 312, rotating shaft; 313, winding wheel; 314, connecting rope; 315, fixing block; 316, torsion spring; 317, cam; 318, protrusion; 319, fixing plate; 3110, pressure plate; 3111, guide column; 3112, first spring; 3113, pressure sensor; 311 4. Pressure block; 3115. Corrugated pipe; 3116. Pad; 3117. Threading limit frame; 320. Hydraulic correction unit; 321. Correction plate; 322. Hydraulic cylinder; 400. Loading unit; 410. Loading box; 420. Connecting frame; 500. Guide shoe unit; 510. Connecting seat; 520. Bracket; 530. Swing arm; 540. Rubber wheel; 550. Slide groove; 560. Slide rod; 570. Sliding block; 580. Second spring. Detailed Implementation

[0019] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0020] According to the appendix Figure 1 and attached Figure 2 As shown, this embodiment provides a mine shaft hoisting and limiting device, including a shaft working platform 100, a winch hoist 200, a hoisting and limiting unit 300, and a loading unit 400.

[0021] The hoist 200 is installed on the vertical shaft working platform 100 to provide power for hoisting the loading unit 400; the hoisting limit unit 300 is set on both sides of the loading unit 400 to guide and limit, and at the same time realize the detection and correction function of the guide rail; the loading unit 400 is located below the vertical shaft working platform 100 to carry minerals or personnel, and is connected to the hoist 200 by ropes.

[0022] According to the appendix Figure 3 and attached Figure 4 As shown, the lifting limit unit 300 includes a jamming sensing unit 310, a hydraulic correction unit 320, and a guide rail assembly. The guide rail assembly consists of several individual guide rails 311, which are arranged vertically along the shaft to form a guide track for the movement of the loading unit 400.

[0023] When one of the individual guide rails 311 in the guide rail assembly undergoes local deformation and bending, the bending part of the individual guide rail 311 is detected by the jamming sensing unit 310.

[0024] When the bending range exceeds the stretchable range of the jamming sensing unit 310, the jamming sensing unit 310 will drive the hydraulic correction unit 320 to perform hydraulic correction on the single guide rail 311, thereby eliminating the bending and preventing the loading unit 400 from jamming during the lifting process.

[0025] Specifically, according to the appendix Figure 4 Appendix Figure 5 and attached Figure 6 As shown, the jamming sensing unit 310 is used to monitor the local deformation of the single guide rail 311 in real time. The jamming sensing unit 310 includes two sets of rotating shafts 312 connected to the middle of the single guide rail 311 by bearings. The two sets of rotating shafts 312 are symmetrically installed and serve as supports. Each rotating shaft 312 is equipped with a winding wheel 313. A connecting rope 314 is wound around the winding wheel 313. One end of the connecting rope 314 is fixedly connected to the winding wheel 313, and the other end of the connecting rope 314 is connected to a fixing block 315. The fixing block 315 is fixedly connected to the end of the single guide rail 311.

[0026] When the single guide rail 311 undergoes local bending deformation, the length of the bent part will change slightly, which will cause the connecting rope 314 to be stretched or loosened, driving the winding wheel 313 and the rotating shaft 312 to rotate. By detecting the amount of rotation of the rotating shaft 312 or the change in tension of the connecting rope 314, the degree of bending of the single guide rail 311 can be reflected.

[0027] To improve the sensitivity and reliability of the card resistance sensing unit 310, according to the attached... Figure 6 As shown, a torsion spring 316 is provided on the outside of the rotating shaft 312. One end of the torsion spring 316 is fixedly connected to the winding wheel 313, and the other end of the torsion spring 316 is fixedly connected to the single guide rail 311. The function of the torsion spring 316 is to provide preload to the winding wheel 313 to ensure that the connecting rope 314 always maintains a certain tension. Even if the single guide rail 311 is recessed inward, causing the connecting rope 314 to loosen, the torsion spring 316 can tighten the connecting rope 314 in time to ensure the accuracy of the sensing.

[0028] Furthermore, in order to convert the displacement of the connecting rope 314 into a measurable physical signal to trigger the correction action, a cam 317 is also installed on the rotating shaft 312. The cam 317 is provided with multiple sets of protrusions 318. A fixing plate 319 is provided on the side of the two sets of cams 317 that are close to each other. The fixing plate 319 is fixedly connected to the single guide rail 311, providing a stable mounting base for the pressure sensor 3113. The pressure sensor 3113 is installed on the fixing plate 319.

[0029] When the single guide rail 311 bends, the stretching or slack of the connecting rope 314 causes the rotating shaft 312 and the cam 317 to rotate. During the rotation, the protrusion 318 on the cam 317 will periodically or when it reaches a certain angle contact and press the pressure sensor 3113, thereby converting the mechanical displacement into an electrical signal.

[0030] More specifically, according to the appendix Figure 6 As shown, a pressure plate 3110 is provided on the side of the fixed plate 319 near the cam 317, and the pressure plate 3110 is in contact with the outer surface of the cam 317. A pressure block 3114 is installed on the pressure plate 3110, and the pressure sensor 3113 and the pressure block 3114 are located on the same axis.

[0031] When the cam 317 rotates, the protrusion 318 will transmit force to the pressure block 3114 by contacting the pressure plate 3110, which will then be sensed by the pressure sensor 3113 and output an electrical signal, so that the change in the rotation angle of the cam 317 can be accurately reflected in the reading of the pressure sensor 3113.

[0032] To ensure that the pressure plate 3110 can move smoothly and return to its original position as the cam 317 rotates, guide posts 3111 are slidably connected to both sides of the fixed plate 319, and the guide posts 3111 are fixedly connected to the pressure plate 3110. A first spring 3112 is provided on the outside of the guide post 3111. One end of the first spring 3112 is fixedly connected to the pressure plate 3110, and the other end of the first spring 3112 is fixedly connected to the fixed plate 319. The cooperation between the guide post 3111 and the first spring 3112 ensures that the pressure plate 3110 maintains good contact with the cam 317 when the cam 317 rotates, and quickly returns to its original position under the action of the spring force when the protrusion 318 leaves, ensuring the measurement accuracy of the sensor.

[0033] To protect the pressure sensor 3113 and the pressure block 3114 from dust, moisture, and impact in the mining environment, according to the attached... Figure 6 As shown, a bellows 3115 is provided on the outside of the pressure sensor 3113 and the pressure block 3114. The two ends of the bellows 3115 are fixedly connected to the fixing plate 319 and the pressure plate 3110 respectively, forming a sealed cavity, which effectively protects the internal precision components.

[0034] To prevent friction and wear on the connecting rope 314 during long-term use, and to ensure its smooth movement when the single guide rail 311 bends, according to the attached... Figure 5 As shown, pads 3116 are symmetrically installed on the single guide rail 311, and multiple sets of wire threading limit brackets 3117 are installed on the pads 3116. The wire threading limit brackets 3117 are located outside the connecting rope 314 and serve to guide and support the connecting rope 314, reducing its contact friction with the guide rail or the environment.

[0035] When the pressure change value detected by the pressure sensor 3113, i.e. the amount of bending, exceeds the preset threshold, it indicates that the deformation of the single guide rail 311 may cause jamming. At this time, the jamming sensing unit 310 will send a signal to drive the hydraulic correction unit 320 to work.

[0036] According to the appendix Figure 4 Appendix Figure 7 and attached Figure 8 As shown, the hydraulic correction unit 320 is used to perform real-time hydraulic correction of the bent parts of the single guide rail 311. To achieve precise correction, the single guide rail 311 is divided into upper and lower correction areas. Each correction area has two sides corresponding to the hydraulic correction unit 320. The hydraulic correction unit 320 includes correction plates 321 respectively disposed on both sides of the upper and lower correction areas. Hydraulic cylinders 322 are symmetrically arranged on the correction plates 321, and the output shafts of the hydraulic cylinders 322 are fixedly connected to the correction plates 321. When correction is required, the hydraulic cylinders 322 extend or retract, applying a thrust to the single guide rail 311 through the correction plates 321, restoring it to its normal straight state.

[0037] In order to enable the correction plate 321 to better adapt to the cross-sectional shape of the single guide rail 311 and achieve more effective correction, according to the attached... Figure 7 and attached Figure 8 As shown, the correction plate 321 is arranged in an L-shape, and the shape of the side of the correction plate 321 that contacts the single guide rail 311 is adapted to the cross-sectional shape of the single guide rail 311. This ensures that the correction force can be applied evenly to the guide rail surface, avoiding local stress concentration, thereby eliminating guide rail bending more stably and efficiently.

[0038] According to the appendix Figure 3 Appendix Figure 7 and attached Figure 9 As shown, this embodiment further optimizes the design of the guide shoe unit 500 in the loading unit 400 so that the loading unit 400 can better cope with the slight deformation of the guide rail and can pass smoothly even before or during the correction process.

[0039] According to the appendix Figure 3 As shown, the loading unit 400 includes a loading box 410 and a connecting frame 420 mounted on the loading box 410. Guide shoe units 500 are provided on both sides of the connecting frame 420.

[0040] Among them, according to the appendix Figure 9As shown, the guide shoe unit 500 is used to slide on the guide rail to guide the lifting and lowering movement of the loading unit 400. The guide shoe unit 500 includes connecting seats 510 symmetrically installed on both sides of the connecting frame 420. A bracket 520 is installed on the connecting seat 510. The left, right and middle parts of the connecting seat 510 are rotatably connected to the swing arm 530 through a rotating shaft, and each swing arm 530 is rotatably connected to the rubber wheel 540 through a bearing.

[0041] The design of multiple swing arms 530 and multiple rubber wheels 540 allows the guide shoe unit 500 to contact the single guide rail 311 in a more flexible manner. The elasticity of the rubber wheels 540 can absorb slight impacts and deformations, while the rotation of the swing arms 530 allows the guide shoe unit 500 to adjust its posture to adapt to the guide rail direction when encountering slight bending, thereby being able to cross the slight deformation area and reducing the system's requirement for immediate correction.

[0042] To further improve the flexibility and adaptability of the guide shoe unit 500, the swing arm 530 has a groove 550 inside, and a slide rod 560 is slidably connected inside the groove 550. Multiple slide rods 560 are mounted on the bracket 520. A slide block 570 is slidably connected to the outside of the slide rod 560, and a second spring 580 is installed between the slide block 570 and the slide rod 560. This allows the swing arm 530 to slide and buffer within a small range relative to the slide block 570 and the slide rod 560 when encountering slight deformation of the guide rail. The second spring 580 provides elastic support and restoring force.

[0043] It should be understood that the guide shoe unit 500 can better adapt to slight unevenness of the guide rail in the vertical and horizontal directions while maintaining stable guidance, further improving the operational stability of the loading unit 400 and its ability to pass through areas of slight deformation.

[0044] The working principle of this invention is as follows: When the loading unit 400 of the mine vertical shaft hoisting device is hoisting, a section of the single guide rail 311 in the guide rail assembly may be locally bent and deformed due to geological subsidence, temperature changes, etc. The connecting rope 314 in the jamming sensing unit 310 will be stretched or loosened due to the bending of the guide rail. The displacement change will drive the winding wheel 313 and the rotating shaft 312 to rotate. The cam 317 on the rotating shaft 312 will rotate accordingly. The protrusion 318 on the cam 317 will periodically press the pressure plate 3110 and the pressure block 3114, thereby causing the pressure sensor 3113 to sense the pressure change.

[0045] When the pressure change detected by the pressure sensor 3113 reaches the preset threshold, indicating that the bending degree of the single guide rail 311 has exceeded the acceptable range and may cause jamming, the jamming sensing unit 310 will immediately send a drive signal to the control system.

[0046] After receiving the signal, the control system will instruct the hydraulic correction unit 320 to start. The hydraulic cylinder 322 in the hydraulic correction unit 320 applies precise hydraulic thrust to the bent single guide rail 311 through the correction plate 321, so that the guide rail is restored to a normal straight state, thereby eliminating potential jamming hazards.

[0047] Meanwhile, the guide shoe unit 500 on the loading unit 400, especially with its flexible design including the swing arm 530, rubber wheel 540, slide bar 560, sliding block 570, and second spring 580, allows the loading unit 400 to pass through these areas smoothly and flexibly, even when the guide rail is slightly deformed or during the gap when the hydraulic correction unit 320 is correcting. This reduces friction and impact caused by slight deformation and improves the smoothness and safety of the overall operation.

[0048] The entire process enables real-time detection, intelligent early warning, and automatic correction of deformation of the single guide rail 311, thereby effectively preventing jamming accidents during the hoisting process of mine vertical shafts and ensuring the safe and efficient production of the mine.

[0049] The embodiments of this specific implementation have been described above. However, this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A mine vertical shaft hoisting limiting device, characterized in that, include: A lifting limiting unit and a loading unit are provided, wherein the lifting limiting unit is disposed on both sides of the loading unit; The lifting limit unit includes a guide rail assembly, a jamming sensing unit, and a hydraulic correction unit; The guide rail assembly is composed of several individual guide rails. When one of the individual guide rails in the guide rail assembly undergoes local deformation and bending, the bending part of the individual guide rail is detected by the blocking sensing unit. When the bending range exceeds the stretching range of the jamming sensing unit, the jamming sensing unit drives the hydraulic correction unit to hydraulically correct the individual guide rail to eliminate the bending and avoid jamming.

2. The mine vertical shaft hoisting limiting device according to claim 1, characterized in that, The locking sensing unit includes two sets of rotating shafts connected to the middle of the single-unit guide rail by bearings. Each rotating shaft is equipped with a winding wheel, and a connecting rope is wound around the winding wheel. One end of the connecting rope is fixedly connected to the winding wheel, and the other end of the connecting rope is connected to a fixing block, which is fixedly connected to the end of the single-unit guide rail. A torsion spring is provided on the outside of the rotating shaft.

3. A mine vertical shaft hoisting limiting device according to claim 2, characterized in that, The rotating shaft is also equipped with a cam, and the cam is provided with multiple sets of protrusions. A fixing plate is provided on the side of the two sets of cams that are close to each other, and the fixing plate is fixedly connected to the single guide rail. A pressure sensor is installed on the fixing plate.

4. A mine vertical shaft hoisting limiting device according to claim 3, characterized in that, A pressure plate is provided on the side of the fixed plate near the cam, and the pressure plate is in contact with the outer surface of the cam. A pressure block is installed on the pressure plate. The pressure sensor and the pressure block are located on the same axis. Guide posts are slidably connected to both sides inside the fixed plate, and the guide posts are fixedly connected to the pressure plate. A first spring is provided on the outside of the guide posts.

5. A mine vertical shaft hoisting limiting device according to claim 4, characterized in that, The pressure sensor and the pressure block are provided with a corrugated pipe, and the two ends of the corrugated pipe are fixedly connected to the fixing plate and the pressure plate, respectively.

6. A mine vertical shaft hoisting limiting device according to claim 2, characterized in that, The single guide rail is symmetrically equipped with pads, and multiple sets of threading limit frames are installed on the pads. The threading limit frames are located outside the connecting rope.

7. A mine vertical shaft hoisting limiting device according to claim 1, characterized in that, The single guide rail is divided into upper and lower correction areas. Each correction area has a hydraulic correction unit on both sides. The hydraulic correction unit includes correction plates respectively set on both sides of the upper and lower correction areas. Hydraulic cylinders are symmetrically arranged on the correction plates. The output shaft of the hydraulic cylinders is fixedly connected to the correction plates.

8. A mine vertical shaft hoisting limiting device according to claim 7, characterized in that, The correction plate is arranged in an L-shape, and the shape of the side of the correction plate that contacts the single guide rail is adapted to the shape of the correction plate.

9. A mine vertical shaft hoisting limiting device according to claim 1, characterized in that, The loading unit includes a loading box and a connecting frame mounted on the loading box. Guide shoe units are provided on both sides of the connecting frame. The guide shoe unit includes a connecting seat symmetrically mounted on both sides of the connecting frame. A bracket is mounted on the connecting seat. The left, right and middle parts of the connecting seat are rotatably connected to a swing arm via a rotating shaft, and a rubber wheel is rotatably connected to the swing arm via a bearing.

10. A mine vertical shaft hoisting limiting device according to claim 9, characterized in that, The swing arm has a sliding groove inside, and a sliding rod is slidably connected inside the sliding groove. Multiple sets of the sliding rods are mounted on the bracket. A sliding block is slidably connected to the outside of the sliding rod, and a second spring is installed between the sliding block and the sliding rod.

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