Anti-falling device of mine hoist
The mine hoist anti-fall device, with its multiple anti-fall structures, combines sliding rods, L-shaped rotating frames, locking blocks, and multi-stage braking of transmission components. This solves the anti-fall problem of existing devices when the triggering conditions are imperfect or a single component fails, achieving a highly efficient and reliable anti-fall effect for the hoist and ensuring the stable operation of the hoisting container and ground safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI JINRISHENG MINING
- Filing Date
- 2025-05-30
- Publication Date
- 2026-04-21
AI Technical Summary
Existing mine hoist fall prevention devices cannot effectively prevent falls when triggering conditions are imperfect or when a single component fails, and may even cause secondary damage to the equipment. Traditional devices cannot be triggered in time when some braking force is insufficient, posing a risk of secondary falls.
A mine hoist anti-fall device was designed. It consists of a multi-stage braking system composed of a sliding rod, an L-shaped rotating frame, a locking block, a motor, a gear transmission shaft, and a gear chain. Combined with the mechanical braking of the locking slot and the locking block, a multi-stage anti-fall system is formed to ensure rapid response and slow down the falling speed under various triggering conditions.
It improves the reliability and braking effect of fall arrest, shortens the time from the occurrence of an accident to the activation of fall arrest, reduces the risk caused by the failure of a single component, and ensures improved operational stability of the container and ground safety.
Smart Images
Figure CN224147453U_ABST
Abstract
Description
Technical Field
[0001] This utility model specifically relates to the field of detection device technology, and more specifically to a mine hoist anti-fall device. Background Technology
[0002] Mine hoists are key pieces of equipment in mine production, used to lift and lower personnel, ore, materials, etc. Safety is paramount during the operation of mine hoists.
[0003] Mining environments are complex and contain numerous hazards. During operation, the hoisting container may unexpectedly fall due to factors such as wire rope breakage, braking system failure, or damage to connecting devices. Such a fall could result in serious casualties and property damage.
[0004] Early mine hoist fall arrestors had several shortcomings. While traditional toothed fall arrestors could provide some fall protection, they had drawbacks in practical application. For example, excessively rapid deceleration could cause secondary damage to the wire rope or the rope-holding drum. Furthermore, if the connection between the drive motor and the rope-holding drum broke, simply waiting for repairs or using an additional emergency motor to lift the load was insufficient to address the uncertainty of the wire rope's safety, leaving the risk of a secondary fall. Additionally, some fall arrestors lacked adequate triggering conditions. For instance, if the winch drum brake was only partially faulty, leaving some braking force but insufficient to brake the hoisting container, traditional fall arrestors might fail to trigger in time, resulting in a failure of the braking and fall prevention process. Utility Model Content
[0005] The purpose of this utility model is to provide a mine hoist fall prevention device. By installing the fall prevention device on the hoist body and using it in conjunction with an external protection device, the hoist fall prevention device not only provides efficient fall prevention but also employs a multi-layered fall prevention structure to reduce secondary damage to the equipment caused by falls; thereby solving the technical problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A mine hoist fall prevention device, comprising
[0008] The hoist body is equipped with a fall protection device, and an external protective device is provided on the outside of the hoist body and the fall protection device.
[0009] The fall arrestor includes a winch, which is fixedly installed on a winch mounting frame. The lower end of the winch wire rope is fixedly connected to the top of the sliding rod. Limiting rings are provided at both the upper and lower ends of the sliding rod, and the lower limiting ring is connected to the lower surface of the bracket. The sliding rod is slidably connected to the bracket.
[0010] The bracket has symmetrically arranged slides on one side, which are slidably connected to the hopper trolley. Auxiliary pulley plates are symmetrically installed on the upper surface of the bracket, and connecting seats are symmetrically installed on the lower surface.
[0011] As a further technical solution of this utility model, the bottom of the sliding rod is rotatably connected to the L-rotating frame, the L-rotating frames are symmetrically arranged, and the ends of the two L-rotating frames are rotatably connected to the bottom of the sliding rod.
[0012] As a further technical solution of this utility model, the corner of the L-shaped rotating frame is rotatably connected to the inside of the connecting seat, and the other end of the L-shaped rotating frame is fixedly connected to the locking block.
[0013] As a further technical solution of this utility model, the winch mounting frame is fixedly installed on the upper surface of the lifting frame, and guide rails are symmetrically arranged on both sides of the lifting frame, and two sets of limiting devices are symmetrically arranged on one side of the lifting frame.
[0014] As a further technical solution of this utility model, a motor is installed on one side of the lifting frame, and the end of the motor is connected to the gear transmission shaft. The gear transmission shaft is symmetrically installed on the inner side of the lifting frame. The gears at the left and right ends of the symmetrically arranged gear transmission shaft are meshed with the gear chain. The gear chain is symmetrically arranged on the inner side of the lifting frame.
[0015] As a further technical solution of this utility model, the toothed chain arranged symmetrically on the left and right sides is also connected to a gear. The gear is installed on one side of the pulley plate, the pulley plate is slidably connected to the guide rail, and the other side of the pulley plate is connected to a fixed shaft.
[0016] As a further technical solution of this utility model, the gears and pulley plates are symmetrically installed at both ends of the fixed shaft, and the fixed shaft is fixedly connected to the symmetrically arranged slide frame; the outer side of the symmetrically arranged auxiliary pulley plate is fixedly connected to the symmetrically arranged pulley plate, and the auxiliary pulley plate is slidably connected to the guide rail on one side of the lifting frame.
[0017] As a further technical solution of this utility model, the inner side of the lifting frame is provided with slots arranged in a rectangular array. The slots are symmetrically arranged, and when a fall occurs, the slots are connected to the blocks.
[0018] As a further technical solution of this utility model, the lifting frame is provided with an outer frame on the outside, and wire mesh is installed on the three lower sides of the outer frame.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] 1. In this utility model, the anti-fall device not only relies on the direct braking of the sliding rod, L-shaped rotating frame, and locking block, but also the transmission components such as the motor, gear drive shaft, gear chain, and gears participate in the anti-fall process. When a fall occurs, the transmission system can use its own inertia and torque to slow down the falling speed of the lifting container to a certain extent. It works in conjunction with the mechanical braking of the locking block and slot to form a multi-stage braking system, which improves the reliability and braking effect of the anti-fall device and reduces the risk of anti-fall failure due to the failure of a single component.
[0021] 2. The present invention provides a fall arrest device with multiple triggering conditions such as rapid fall and wire rope breakage. No matter what causes the lifting container to lose control, the sliding rod can respond quickly and drive the L-shaped rotating frame to make the locking block and the locking slot engage quickly. Compared with the traditional fall arrest device with a single triggering method, it greatly shortens the time from the occurrence of the accident to the start of the fall arrest action, effectively avoiding or reducing the harm caused by the fall accident.
[0022] 3. In this utility model, the limiting ring in the device can limit the movement range of the sliding rod and prevent it from moving excessively; the symmetrically arranged slide frame, auxiliary pulley plate and other structures not only enhance the overall stability of the device, but also cooperate with the guide rail to ensure the stability of the running trajectory of the lifting container during normal operation and fall prevention; the outer frame and wire mesh of the outer protective device can prevent materials from falling and injuring people during the lifting process and ensure the safety of ground operations. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0024] Figure 2 This utility model Figure 1 Top view.
[0025] Figure 3 This utility model Figure 2 A schematic diagram of the split structure.
[0026] Figure 4 This utility model Figure 3 A bottom view.
[0027] Figure 5 This utility model Figure 3 A schematic diagram of the partially split structure.
[0028] Figure 6 This utility model Figure 3 A schematic diagram of the partially split structure.
[0029] Figure 7 This utility model Figure 4 A magnified view of a portion of the image.
[0030] Figure 8 This utility model Figure 5 A magnified view of a portion of the image.
[0031] In the diagram: 1- Hoist body, 2- Fall protection device, 3- External protection device;
[0032] 11-Lifting frame, 12-Guide rail, 13-Limiting device, 14-Winder mounting frame, 15-Motor, 16-Gear drive shaft, 17-Gear chain, 18-Gear, 19-Pulley plate, 110-Fixed shaft, 111-Slot;
[0033] 21-Winder, 22-Sliding rod, 23-Limit ring, 24-Bracket, 25-Slide carriage, 26-Hopper trolley, 27-Auxiliary pulley plate, 28-Connecting seat, 29-L-rotating frame, 210-Clamping block;
[0034] 31-Outer frame, 32-Wire mesh. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0036] Please see Figure 1-8 In this embodiment of the utility model, a mine hoist anti-fall device includes a hoist body 1, an anti-fall device 2 is installed on the hoist body 1, and an outer protective device 3 is provided on the outside of the hoist body 1 and the anti-fall device 2.
[0037] The fall arrestor 2 includes a winch 21, which is fixedly mounted on a winch mounting frame 14. The lower end of the wire rope of the winch 21 is fixedly connected to the top of the sliding rod 22. Both the upper and lower ends of the sliding rod 22 are provided with limit rings 23. The lower limit ring 23 is connected to the lower surface of the bracket 24. The sliding rod 22 is slidably connected to the bracket 24.
[0038] The bracket 24 is symmetrically provided with a slide 25 on one side. The symmetrically provided slide 25 is slidably connected to the hopper trolley 26. The upper surface of the bracket 24 is symmetrically provided with auxiliary pulley plates 27, and the lower surface is symmetrically provided with connecting seats 28.
[0039] The bottom of the sliding rod 22 is rotatably connected to the L-rotating frame 29, the L-rotating frames 29 are symmetrically arranged, and the ends of the two L-rotating frames 29 are rotatably connected to the bottom of the sliding rod 22.
[0040] The L-shaped rotating frame 29 is rotatably connected to the inside of the connecting seat 28 at its corner, and the other end of the L-shaped rotating frame 29 is fixedly connected to the locking block 210.
[0041] By adopting the above technical solution, the fall arrestor 2 has multiple triggering conditions such as rapid fall and wire rope breakage. No matter what causes the lifting container to lose control, the sliding rod 22 can respond quickly and drive the L rotating frame 29 to make the locking block 210 engage with the locking slot 111 quickly. Compared with the traditional fall arrestor with a single triggering method, it greatly shortens the time from the occurrence of the accident to the start of the fall arrest action, effectively avoiding or reducing the harm caused by the fall accident.
[0042] In this embodiment, the winch mounting frame 14 is fixedly installed on the upper surface of the lifting frame 11. Guide rails 12 are symmetrically arranged on both sides of the lifting frame 11, and two sets of limiting devices 13 are symmetrically arranged on one side of the lifting frame 11.
[0043] A motor 15 is installed on one side of the lifting frame 11. The end of the motor 15 is connected to the gear drive shaft 16. The gear drive shaft 16 is symmetrically installed on the inner side of the lifting frame 11. The gears at the left and right ends of the symmetrically arranged gear drive shaft 16 are meshed with the gear chain 17. The gear chain 17 is symmetrically arranged on the inner side of the lifting frame 11.
[0044] The toothed chain 17, which is symmetrically arranged on the left and right, is also meshed with a gear 18. The gear 18 is installed on one side of the pulley plate 19, the pulley plate 19 is slidably connected to the guide rail 12, and the other side of the pulley plate 19 is connected to the fixed shaft 110.
[0045] The gear 18 and pulley plate 19 are symmetrically installed at both ends of the fixed shaft 110, and the fixed shaft 110 is fixedly connected to the symmetrically arranged slide 25; the outer side of the symmetrically arranged auxiliary pulley plate 27 is fixedly connected to the symmetrically arranged pulley plate 19, and the auxiliary pulley plate 27 is slidably connected to the guide rail 12 on one side of the lifting frame 11.
[0046] The inner side of the lifting frame 11 is provided with a rectangular array of slots 111 arranged symmetrically. When a fall occurs, the slots 111 are connected to the block 210.
[0047] The lifting frame 11 is provided with an outer frame 31 on the outside, and wire mesh 32 is installed on the three sides of the lower end of the outer frame 31.
[0048] By adopting the above technical solution, the fall arrestor 3 not only relies on the direct braking of the sliding rod 22, L-rotating frame 29 and locking block 210, but also the transmission components such as motor 15, gear transmission shaft 16, gear chain 17, and gear 18 participate in the fall arrest process. When a fall occurs, the transmission system can use its own inertia and torque to slow down the falling speed of the lifting container to a certain extent. It works in conjunction with the mechanical braking of locking block 210 and locking slot 111 to form a multi-stage braking system, which improves the reliability and braking effect of the fall arrest and reduces the risk of fall arrest failure due to the failure of a single component.
[0049] The limiting ring 23 in the device can limit the movement range of the sliding rod 22 and prevent it from moving excessively; the symmetrically arranged slide 25, auxiliary pulley plate 27 and other structures not only enhance the overall stability of the device, but also cooperate with the guide rail 12 to ensure the stability of the lifting container's running trajectory during normal operation and fall prevention; the outer frame 31 and wire mesh 32 of the outer protection device 3 can prevent materials from falling and injuring people during the lifting process and ensure the safety of ground operations.
[0050] The working principle of this utility model is as follows: When the mine hoist is operating normally, the motor 15 starts, and the gear drive shaft 16 at its end starts to rotate. The gears at the left and right ends of the gear drive shaft 16, which is symmetrically installed, mesh with the gear chain 17, driving the gear chain 17 to rotate cyclically. The gear chain 17 also meshes with the gear 18 installed on one side of the pulley plate 19, causing the gear 18 to rotate, thereby driving the pulley plate 19 to slide up and down along the guide rail 12. The pulley plate 19 is connected to the slide frame 25 through the fixed shaft 110. The slide frame 25 is slidably connected to the hopper trolley 26, ultimately realizing the smooth lifting and lowering of the hopper trolley 26.
[0051] At the same time, the winch 21 is in a taut state, and the sliding rod 22 connected to the lower end of its wire rope is pressed against the lower surface of the bracket 24 by the limiting ring 23 at the lower end of the sliding rod 22 under the action of the wire rope tension. At this time, the sliding rod 22 remains stationary relative to the bracket 24, the L-shaped rotating frame 29 at the bottom of the sliding rod 22 does not rotate, the locking block 210 is separated from the locking groove 111 on the inner side of the lifting frame 11, and the anti-fall device 2 does not participate in the normal lifting and lowering action of the hoist, but is only in a standby state.
[0052] In the event of a sudden and rapid fall or a breakage of the wire rope of the winch 21, the anti-fall function of the device is immediately activated. Under the action of gravity, the sliding rod 22 loses the tension of the wire rope and begins to move rapidly downward along the inside of the bracket 24. As the sliding rod 22 moves downward, the limiting ring 23 at its upper end contacts and collides with the upper surface of the bracket 24. The obstruction of the limiting ring 23 causes the downward movement of the sliding rod 22 to drive the L-shaped rotating frame 29 at its bottom to rotate.
[0053] Because the L-shaped rotating frame 29 is rotatably connected to the inside of the connecting seat 28 at the corner, and the other end is fixedly connected to the locking block 210, the rotation of the L-shaped rotating frame 29 drives the locking block 210 to rotate synchronously, so that the locking block 210 quickly engages with the locking slots 111 arranged in a rectangular array on the inner side of the lifting frame 11. After the locking block 210 and the locking slots 111 are tightly engaged, they immediately stop the bracket 24 and the hopper trolley 26 connected to the bracket 24, thereby preventing the lifting container from continuing to fall and realizing the anti-fall function. In addition, the transmission components such as the motor 15, gear drive shaft 16, gear chain 17, and gear 18 can use their own inertia and torque to slow down the falling speed of the lifting container to a certain extent at the moment of anti-fall, which works in conjunction with the mechanical braking of the locking block 210 and the locking slots 111 to further enhance the anti-fall effect.
[0054] The fall arrestor 3 not only relies on the direct braking of the sliding rod 22, L-rotating frame 29 and locking block 210, but also the transmission components such as motor 15, gear drive shaft 16, gear chain 17 and gear 18 participate in the fall arrest process. When a fall occurs, the transmission system can use its own inertia and torque to slow down the falling speed of the lifting container to a certain extent. It works in conjunction with the mechanical braking of locking block 210 and locking slot 111 to form a multi-stage braking system, which improves the reliability and braking effect of the fall arrest and reduces the risk of fall arrest failure due to the failure of a single component.
[0055] The fall arrestor 2 has multiple triggering conditions such as rapid fall and wire rope breakage. No matter what causes the lifting container to go out of control, the sliding rod 22 can respond quickly and drive the L rotating frame 29 to make the locking block 210 engage with the locking slot 111 quickly. Compared with the traditional fall arrestor with a single triggering method, it greatly shortens the time from the occurrence of the accident to the start of the fall arrest action, effectively avoiding or reducing the harm caused by the fall accident.
[0056] The limiting ring 23 in the device can limit the movement range of the sliding rod 22 and prevent it from moving excessively; the symmetrically arranged slide 25, auxiliary pulley plate 27 and other structures not only enhance the overall stability of the device, but also cooperate with the guide rail 12 to ensure the stability of the lifting container's running trajectory during normal operation and fall prevention; the outer frame 31 and wire mesh 32 of the outer protection device 3 can prevent materials from falling and injuring people during the lifting process and ensure the safety of ground operations.
[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A mine hoist anti-falling device, characterized in that: include The hoist body (1) is equipped with a fall protection device (2), and an external protection device (3) is provided on the outside of the hoist body (1) and the fall protection device (2); The fall arrestor (2) includes a winch (21), which is fixedly installed on a winch mounting frame (14). The lower end of the wire rope of the winch (21) is fixedly connected to the top of the sliding rod (22). Both the upper and lower ends of the sliding rod (22) are provided with limit rings (23). The lower limit ring (23) is connected to the lower surface of the bracket (24). The sliding rod (22) is slidably connected to the bracket (24). The bracket (24) is symmetrically provided with a slide (25) on one side. The symmetrically provided slide (25) is slidably connected to the hopper trolley (26). The upper surface of the bracket (24) is symmetrically provided with auxiliary pulley plates (27), and the lower surface is symmetrically provided with connecting seats (28).
2. Mine hoist fall arrest device according to claim 1, characterized in that: The bottom of the sliding rod (22) is rotatably connected to the L-rotating frame (29), the L-rotating frame (29) is symmetrically arranged, and the ends of the two L-rotating frames (29) are rotatably connected to the bottom of the sliding rod (22).
3. Mine hoist fall arrest device according to claim 2, characterized in that: The L-shaped rotating frame (29) is rotatably connected to the inside of the connecting seat (28) at the corner, and the other end of the L-shaped rotating frame (29) is fixedly connected to the locking block (210).
4. Mine hoist fall arrest device according to claim 1, characterized in that: The winch mounting frame (14) is fixedly installed on the upper surface of the lifting frame (11). Guide rails (12) are symmetrically arranged on both sides of the lifting frame (11), and two sets of limiting devices (13) are symmetrically arranged on one side of the lifting frame (11).
5. Mine hoist fall arrest device according to claim 4, characterized in that: A motor (15) is installed on one side of the lifting frame (11). The end of the motor (15) is connected to the gear drive shaft (16). The gear drive shaft (16) is installed symmetrically inside the lifting frame (11). The gears at the left and right ends of the symmetrically arranged gear drive shaft (16) are meshed with the gear chain (17). The gear chain (17) is symmetrically arranged inside the lifting frame (11).
6. Mine hoist fall arrest device according to claim 5, characterized in that: The toothed chain (17) arranged symmetrically on the left and right is also meshed with a gear (18). The gear (18) is installed on one side of the pulley plate (19). The pulley plate (19) is slidably connected to the guide rail (12). The other side of the pulley plate (19) is connected to the fixed shaft (110).
7. Mine hoist fall arrest device according to claim 6, characterized in that The gear (18) and pulley plate (19) are symmetrically installed at both ends of the fixed shaft (110), and the fixed shaft (110) is fixedly connected to the symmetrically arranged slide (25); the outer side of the symmetrically arranged auxiliary pulley plate (27) is fixedly connected to the symmetrically arranged pulley plate (19), and the auxiliary pulley plate (27) is slidably connected to the guide rail (12) on one side of the lifting frame (11).
8. Mine hoist fall arrest device according to claim 7, characterized in that: The inner side of the lifting frame (11) is provided with slots (111) arranged in a rectangular array. The slots (111) are symmetrically arranged. When a fall occurs, the slots (111) are connected to the block (210).
9. Mine hoist fall arrest device according to claim 8, characterized in that: The lifting frame (11) is provided with an outer frame (31) on the outside, and wire mesh (32) is installed on the three sides of the lower end of the outer frame (31).