Adjustable centrifugal overspeed protection device for coal mine monorail crane

Abstract

The invention discloses an adjustable centrifugal overspeed protection device for a coal mine monorail crane, relates to the technical field of monorail crane locomotives, and aims to solve the problems that an existing monorail crane is single in braking structure, braking treatment on the monorail crane is difficult to finish twice or even three times under the condition that the monorail crane is excessively abraded or damaged; the monorail crane comprises two trolley shells, and the two trolley shells are arranged on the trolley shell. In the using process, the first protection assembly and the second protection assembly can be subjected to multiple times of speed reduction treatment with the sliding assembly, and the situation that the first protection assembly or the second protection assembly cannot effectively finish speed reduction treatment on the sliding assembly is avoided; and if the interior of the pressure assembly or the adjusting assembly is damaged and effective gas circulation cannot be formed, the third protection assembly also completes locking treatment on the sliding assembly, it is further ensured that the device can effectively protect the trolley mechanism when the trolley mechanism overspeeds, and the safety of the device in use can be improved through the arrangement of multiple insurance.

Description

Technical Field

[0001] The invention relates to the technical field of monorail crane locomotives, and more specifically to an adjustable centrifugal overspeed protection device for coal mine monorail cranes. Background Art

[0002] The explosion-proof diesel monorail crane locomotive used underground is a multifunctional, efficient and multi-purpose underground auxiliary transport vehicle. As a load-carrying and personnel transport equipment, its operating safety must be guaranteed. The national standard has clear requirements on the operating speed of the monorail crane locomotive. The adjustable monorail crane centrifugal overspeed protection device is a safety device specially designed for the monorail crane system. It aims to prevent the monorail crane from running at an overspeed, thereby protecting the safety of equipment and personnel.

[0003] Chinese patent document (CN113830672B) discloses an adjustable monorail crane centrifugal overspeed protection device, which states in the specification that "it includes a clamping speed-taking device, a centrifugal protection device, a lever starting device and an overspeed protection trolley. The clamping speed-taking device obtains the running speed of the monorail crane in real time, and transmits the rotation speed to the centrifugal protection device. Under the action of centrifugal force, the slide bar slides out of the centrifugal protection device, and the lever is pushed to start the hydraulic brake circuit to complete the overspeed braking of the monorail crane. The present invention is used to obtain the running speed of the monorail crane in real time, and transmit the rotation speed to the centrifugal protection device to start the brake. There is no direct connection between the lever starting device and the centrifugal protection device, thereby ensuring that the overspeed braking protection is started safely and reliably." However, in actual use, it still has a single protection method. If one of them is defective or damaged, it is difficult to achieve emergency braking when the monorail crane moves at an overspeed.

[0004] When the running speed of the monorail crane exceeds the preset safety threshold, the speed wheel will quickly capture the speed signal and accurately transmit it to the centrifugal protection device. The traditional practice is to immediately apply emergency braking to the monorail crane through the hydraulic braking system. However, this single braking structure has exposed the problem of low braking efficiency in actual application, especially when the braking components are excessively worn or damaged, its braking ability is often greatly reduced. More importantly, once the primary braking means fails, the existing system often lacks an effective backup or redundant braking mechanism to ensure that the monorail crane can stop safely. The limitations of this single braking structure greatly limit the safety performance of the monorail crane during use, making it impossible to fully guarantee the safety of personnel and cargo in an emergency. In view of this, we propose an adjustable centrifugal overspeed protection device for coal mine monorail cranes. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable coal mine monorail crane centrifugal overspeed protection device to solve the technical problem that the existing monorail crane has a single braking structure, it is difficult to achieve a second or even three times of braking of the monorail crane in the event of excessive wear or damage, and limits the safety of the existing monorail crane when in use.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an adjustable coal mine monorail crane centrifugal overspeed protection device, comprising:

[0007] A rail and trolley mechanism, wherein the trolley mechanism comprises two trolley shells, four sliding assemblies arranged in the two trolley shells, a bottom plate located below the two trolley shells, reinforcing ribs, four first mounting buckles, four first pulleys and four first protection assemblies, wherein the four first pulleys are connected to the trolley shells through four first mounting buckles, and the four first protection assemblies are arranged in the trolley shells; and an overspeed protection mechanism comprises a shell assembly, four pressure assemblies arranged in the shell assembly, an adjusting assembly, two second protection assemblies connected to the adjusting assembly, a centrifugal assembly and a third protection assembly, wherein the adjusting assembly is connected to the four pressure assemblies, the centrifugal assembly is connected to the shell assembly, and the third protection assembly is located on both sides of the shell assembly.

[0008] During use, the present invention can not only perform multiple deceleration processes on the sliding component through the first protection component and the second protection component respectively, but also avoid the first protection component or the second protection component being unable to effectively complete the deceleration process of the sliding component due to the weakening of friction due to long-term use. At the same time, if the pressure component or the adjustment component is damaged internally and cannot form effective gas circulation, the third protection component will also complete the locking process of the sliding component, further ensuring that the device can effectively protect the trolley mechanism when it is overspeeding. The safety of the device during use can be improved by setting multiple insurances.

[0009] Preferably, the inner wall of the trolley shell is clamped with two sliding components, the bottom of the trolley shell is fixedly connected to the top of the base plate, the two trolley shells are fixedly connected through the base plate, the base plate is fixedly connected to the bottom of the trolley shell through reinforcing ribs, a first pulley is provided below the inner wall of the trolley shell, the first pulley is rotatably connected to the trolley shell through a first mounting buckle, and the inner wall of the trolley shell is fixedly connected to two first protective components.

[0010] Preferably, the front of the shell component is fixedly connected to the adjustment component, the front of the adjustment component is fixedly connected to the second protection component, the adjustment component is connected to four pressure components, and the four pressure components are fixedly connected in the shell component, the back of the shell component is fixedly connected to the centrifugal component, and the two third protection components are respectively located on both sides of the shell component;

[0011] The housing assembly is fixedly connected to the inner wall of the vehicle housing.

[0012] Preferably, the sliding assembly includes a second mounting buckle, the second mounting buckle is clamped on the outside of the driving shaft, the driving shaft outer shell is connected with a shaft sleeve, one end of the driving shaft passes through the brake pad and is fixedly connected to the second pulley, and the brake pad is fixedly connected with a plurality of slots;

[0013] The second mounting buckle is clamped on one side of the trolley housing, and the shaft sleeve and the trolley housing are clamped with each other.

[0014] Preferably, the first protection component comprises an electric cylinder, one end of the electric cylinder is fixedly connected to a protection frame, and the other end of the protection frame is fixedly connected to a first brake plate;

[0015] The electric cylinder is fixedly connected to one side of the inner wall of the trolley housing, and the positions of the first brake pad and the brake pad correspond to each other.

[0016] Preferably, the housing assembly comprises a mounting shell, an inner shell is rotatably connected inside the mounting shell, a plurality of mounting plates are fixedly connected outside the mounting shell, a plurality of connection holes are opened inside the inner shell, and two trigger switches are fixedly connected to the front of the mounting shell;

[0017] The mounting shell is fixedly connected to the inner wall of the trolley shell through a mounting plate and bolts, the inner shell is fixedly connected to the centrifugal assembly, the four pressure assemblies are connected to the adjustment assembly through connecting holes, and the trigger switch is connected to the electric cylinder through a signal.

[0018] Preferably, the second protection assembly comprises a positioning nut, both sides of the positioning nut are fixedly connected with positioning frames, the two positioning frames are fixedly connected with trigger blocks outside, and the two positioning frames are fixedly connected with the two second brake plates respectively;

[0019] The position of the second brake plate corresponds to the position of the brake pad, the position of the trigger block corresponds to the position of the trigger switch, and the two positioning frames are fixedly connected to the adjustment assembly through positioning nuts;

[0020] The adjustment assembly comprises a sealing cylinder, a movable rod is slidably connected inside the sealing cylinder, a second piston plate is fixedly connected to one end of the movable rod, the size of the second piston plate corresponds to the size of the inner wall of the sealing cylinder, and a plurality of air holes are opened outside the sealing cylinder;

[0021] The sealing cylinder is fixedly connected to the mounting shell, the other end of the movable rod is fixedly connected to the positioning frame through a positioning nut, and the sealing cylinder is connected to the connecting hole through an air hole.

[0022] Preferably, the pressure assembly includes a sliding sleeve, a sliding rod is slidably connected inside the sliding sleeve, a magnetic block is fixedly connected to the top of the sliding rod, a counterweight block is arranged above the magnetic block, and the counterweight block is a metal counterweight block, the bottom end of the sliding rod is fixedly connected to the first piston plate, the sliding rod outer cover is connected to the first spring, and the two ends of the first spring are respectively fixedly connected to the top of the first piston plate and the top of the inner wall of the sliding sleeve;

[0023] The sliding sleeve is fixedly connected in the inner shell, and the sliding sleeve is communicated with the sealing cylinder through a connecting hole.

[0024] Preferably, the centrifugal assembly comprises a rotating shaft, the rotating shaft passes through a bearing and is fixedly connected to a plurality of elastic telescopic rods, and the other ends of the plurality of elastic telescopic rods are fixedly connected to friction blocks;

[0025] The other end of the rotating shaft passes through the mounting shell and is fixedly connected to the inner shell, and the bearing is clamped on one side of the mounting shell.

[0026] Preferably, the third protection component includes a retaining frame, a limiting cylinder is fixedly connected inside the retaining frame, a limiting rod is slidably connected inside the limiting cylinder, one end of the limiting rod is fixedly connected to the magnetic plate, the other end of the limiting rod is fixedly connected to the connecting plate, a second spring is externally connected to the limiting rod, the two ends of the second spring are respectively fixedly connected to the limiting cylinder and the connecting plate, two connecting frames are fixedly connected to the other side of the connecting plate, and the two connecting frames are both arc-shaped, and a plurality of blocks are fixedly connected to the outside of the two connecting frames;

[0027] The retaining frame is fixedly connected to the outside of the mounting shell, the opposite surfaces of the magnetic plate and the magnetic block repel each other, and the shapes of the plurality of clamping blocks are matched with the shapes of the plurality of clamping slots.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention designs a centrifugal component, a first protection component, a second protection component and a third protection component. When overspeeding, the excessive rotation speed of the centrifugal component will drive the pressure component on the inner wall of the shell to extend, and the first protection component runs in contact with the sliding component to form a secondary deceleration. If the centrifugal force is not weakened at this time, the pressure component continues to extend to push the third protection component to jam the sliding component, forming a tertiary deceleration. During use, the device can not only perform multiple deceleration processes with the sliding component through the first protection component and the second protection component respectively, but also avoid the first protection component or the second protection component being unable to effectively complete the deceleration process of the sliding component due to the weakening of friction due to long-term use. At the same time, if the pressure component or the adjustment component is damaged and cannot form effective gas circulation, the third protection component will also complete the locking process of the sliding component, further ensuring that the device can effectively protect the trolley mechanism when it is overspeeding. The safety of the device when in use can be improved by setting multiple insurances.

[0030] 2. The present invention also designs a first protection component and a second protection component. When the trolley shell moves, the first pulley, the second pulley and several friction blocks will rotate due to the friction force when contacting the rail, and the positioning frame connected to the outside of the movable rod will contact the brake pad through the second brake plate. The trigger block squeezes the trigger switch to synchronously start the electric cylinder, and the friction between the first brake plate and the second brake plate and the brake pad slows down or stops the rotation of the second pulley, thereby completing the initial deceleration of the device. This method only causes wear to the side of the brake pad, the first brake plate and the second brake plate. Therefore, the device can maintain the braking efficiency while ensuring its service life.

[0031] 3. The present invention also designs a third protection component. When the first brake plate and the second brake plate fail to slow down the rotation speed of the second pulley by contacting the brake pad, resulting in the inability to reduce the centrifugal force of the counterweight block, the magnetic plate pushes the limit rod to slide in the limit cylinder, and the limit cylinder pushes the connecting frame and the card block to quickly get stuck in several card slots outside the brake pad, directly locking the brake pad. On the one hand, the device can slow down the rotation speed of the brake pad by frictionally contacting the first friction plate and the second friction plate of the brake pad with low loss to complete the deceleration process of the second pulley. When it fails, the device will trigger an emergency braking process, and the brake pad will be directly locked by docking the card block with the card slot outside the brake pad, thereby improving the insurance effect of the device and the safety when using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the trolley mechanism of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure of the trolley housing of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the overspeed protection mechanism of the present invention;

[0036] Figure 5 It is a schematic diagram of the cross-sectional structure of the housing assembly of the present invention;

[0037] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0038] Figure 7 is a schematic structural diagram of a third protection component of the present invention;

[0039] Figure 8 It is a schematic diagram of the structure of the sliding assembly of the present invention.

[0040] Description of the numbers in the figure:

[0041] 1. Rails; 2. Trolley mechanism; 3. Overspeed protection mechanism;

[0042] 201, trolley housing; 202, sliding assembly; 203, bottom plate; 204, reinforcing ribs; 205, first mounting buckle; 206, first pulley; 207, first protection assembly;

[0043] 301, housing assembly; 302, second protection assembly; 303, pressure assembly; 304, adjustment assembly; 305, centrifugal assembly; 306, third protection assembly;

[0044] 2021, second mounting buckle; 2022, driving shaft; 2023, shaft sleeve; 2024, brake pad; 2025, second pulley; 2026, slot;

[0045] 2071, electric cylinder; 2072, protection frame; 2073, first brake plate;

[0046] 3011, mounting shell; 3012, mounting plate; 3013, inner shell; 3014, connecting hole; 3015, trigger switch;

[0047] 3021, positioning nut; 3022, positioning frame; 3023, trigger block; 3024, second brake plate;

[0048] 3031, sliding sleeve; 3032, sliding rod; 3033, magnetic block; 3034, counterweight block; 3035, first piston plate; 3036, first spring;

[0049] 3041, sealing cylinder; 3042, movable rod; 3043, second piston plate; 3044, air hole;

[0050] 3051, rotating shaft; 3052, bearing; 3053, elastic telescopic rod; 3054, friction block;

[0051] 3061, retaining frame; 3062, limiting cylinder; 3063, limiting rod; 3064, magnetic plate; 3065, connecting plate; 3066, second spring; 3067, connecting frame; 3068, clamping block. DETAILED DESCRIPTION

[0052] like Figures 1 to 8 As shown, the present invention relates to an adjustable coal mine monorail crane centrifugal overspeed protection device, comprising:

[0053] Rails 1 and a trolley mechanism 2, wherein the trolley mechanism 2 comprises two trolley shells 201, four sliding assemblies 202 arranged in the two trolley shells 201, a bottom plate 203 located below the two trolley shells 201, a reinforcing rib 204, four first mounting buckles 205, four first pulleys 206 and four first protection assemblies 207, wherein the four first pulleys 206 are connected to the trolley shells 201 through the four first mounting buckles 205, and the four first protection assemblies 207 are arranged in the trolley shells 201; and an overspeed protection mechanism 3, comprising a shell assembly 301, four pressure assemblies 303 arranged in the shell assembly 301, an adjusting assembly 304, two second protection assemblies 302 connected to the adjusting assembly 304, a centrifugal assembly 305 and a third protection assembly 306, wherein the adjusting assembly 304 is connected to the four pressure assemblies 303, the centrifugal assembly 305 is connected to the shell assembly 301, and the third protection assembly 306 is located on both sides of the shell assembly 301. When overspeeding, the pressure assembly 303 on the inner wall of the shell will extend due to the excessive rotation speed of the centrifugal assembly 305. , thereby extracting the air in the regulating component 304, thereby driving the second protecting component 302 to fit the sliding component 202 to form resistance, preventing the sliding component 202 from rotating. At the same time, the first protecting component 207 runs to fit the sliding component 202 to form a secondary deceleration. If the centrifugal force is not weakened at this time, the pressure component 303 continues to extend to push the third protecting component 306 to jam the sliding component 202, forming a triple deceleration, so that the device can not only perform multiple deceleration processes with the sliding component 202 through the first protecting component 207 and the second protecting component 302 respectively during use, avoiding the first protecting component 207 or the second protecting component 302 from being unable to effectively complete the deceleration process of the sliding component 202 due to the weakening of friction due to long-term use, but also, if the pressure component 303 or the regulating component 304 is damaged and cannot form an effective gas circulation, the third protecting component 306 will also complete the locking process of the sliding component 202, further ensuring that the device can effectively protect the trolley mechanism 2 when it is overspeeding, and the safety of the device when in use can be improved through the setting of multiple insurances.

[0054] In an embodiment of the present invention, the inner wall of the trolley shell 201 is clamped with the two sliding components 202, the lower part of the trolley shell 201 is fixedly connected to the upper part of the bottom plate 203, the two trolley shells 201 are fixedly connected through the bottom plate 203, the bottom plate 203 is fixedly connected to the lower part of the trolley shell 201 through the reinforcing ribs 204, a first pulley 206 is provided below the inner wall of the trolley shell 201, the first pulley 206 is rotatably connected to the trolley shell 201 through the first mounting buckle 205, the inner wall of the trolley shell 201 is fixedly connected to the two first protection components 207, the front of the shell component 301 is fixedly connected to the adjustment component 304 The front of the adjusting component 304 is fixedly connected to the second protection component 302, the adjusting component 304 is connected to the four pressure components 303, and the four pressure components 303 are fixedly connected in the shell component 301, the back of the shell component 301 is fixedly connected to the centrifugal component 305, and the two third protection components 306 are respectively located on both sides of the shell component 301. The shell component 301 is fixedly connected to the inner wall of the trolley shell 201. When the trolley shell 201 moves, the first pulley 206, the second pulley 2025 and the plurality of friction blocks 3054 will rotate due to the friction when they contact the rail 1. If the trolley shell 201 moves, the first pulley 206, the second pulley 2025 and the plurality of friction blocks 3054 will rotate due to the friction when they contact the rail 1. If the speed is too fast, the first pulley 206, the second pulley 2025 and the plurality of friction blocks 3054 will rotate too fast. At this time, the elastic force of the first spring 3036 is less than the centrifugal force of the counterweight block 3034 when rotating at high speed, so that the counterweight block 3034 pulls the sliding rod 3032 to move in the sliding sleeve 3031, and the first piston plate 3035 will extract the air in the sealing cylinder 3041 through the air hole 3044 and the connecting hole 3014, so that the movable rod 3042 slides in the sealing cylinder 3041. At this time, the positioning frame 3022 connected to the outside of the movable rod 3042 will contact the brake pad 2024 through the second brake plate 3024. At the same time, the trigger block 3023 squeezes the trigger switch 3015 to synchronously turn on the electric cylinder 2071, so that the electric cylinder 2071 drives the first brake plate 2073 to contact the brake pad 2024, and the friction between the first brake plate 2073 and the second brake plate 3024 and the brake pad 2024 slows down or stops the rotation of the second pulley 2025, slows down the moving speed of the device, and completes the initial deceleration of the device. This method only causes wear to the side of the brake pad 2024, the first brake plate 2073 and the second brake plate 3024. Therefore, the device can maintain braking efficiency while ensuring its service life.

[0055] In an embodiment of the present invention, the sliding assembly 202 includes a second mounting buckle 2021, the second mounting buckle 2021 is clamped on the outside of the driving shaft 2022, the outer sleeve of the driving shaft 2022 is connected to the shaft sleeve 2023, one end of the driving shaft 2022 passes through the brake pad 2024 and is fixedly connected to the second pulley 2025, the brake pad 2024 is fixedly connected to a plurality of slots 2026, the second mounting buckle 2021 is clamped on one side of the trolley housing 201, the shaft sleeve 2023 and the trolley housing 201 are mutually clamped, and the first protection assembly 207 includes an electric cylinder 2071, one end of the electric cylinder 2071 is fixedly connected to a protection frame 2072, and the other end of the protection frame 2072 is fixedly connected There is a first brake plate 2073, the electric cylinder 2071 is fixedly connected to one side of the inner wall of the trolley housing 201, the positions of the first brake pad 2024 and the brake pad 2024 correspond to each other, the housing assembly 301 includes a mounting shell 3011, the mounting shell 3011 is rotatably connected to the inner shell 3013, the mounting shell 3011 is fixedly connected to a plurality of mounting plates 3012 outside, the inner shell 3013 is provided with a plurality of connecting holes 3014, the front of the mounting shell 3011 is fixedly connected to two trigger switches 3015, the mounting shell 3011 is fixedly connected to the inner wall of the trolley housing 201 through the mounting plate 3012 and bolts, the inner shell 3013 is fixedly connected to the centrifugal assembly 305, four The pressure assembly 303 is connected to the adjustment assembly 304 through the connecting hole 3014, and the trigger switch 3015 is connected to the electric cylinder 2071 through a signal. When the first brake plate 2073 and the second brake plate 3024 fail to slow down the rotation speed of the second pulley 2025 by contacting the brake pad 2024, resulting in the centrifugal force of the counterweight block 3034 cannot be reduced, the counterweight block 3034 will continue to slide outward from the sleeve 3031. At this time, the inner shell 3013 in the rotating state will gradually approach the magnetic plate 3064 through the counterweight block 3034, so that the magnetic field of the magnetic block 3033 squeezes the magnetic plate 3064, and the magnetic plate 3064 pushes the limit rod 3063 to slide in the limit cylinder 3062 , and the limiting cylinder 3062 will push the connecting frame 3067 and the blocking block 3068 to quickly get stuck in the several card slots 2026 outside the brake pad 2024, directly locking the brake pad 2024. On the one hand, the device can slow down the rotation speed of the brake pad 2024 by frictionally contacting the low-loss first friction plate and the second friction plate of the brake pad 2024 to complete the deceleration process of the second pulley 2025. When it fails, the device will trigger the emergency braking process, and the blocking block 3068 will dock with the card slot 2026 outside the brake pad 2024 to directly lock the brake pad 2024, thereby improving the insurance effect of the device and the safety when using the device.

[0056] As another embodiment of the present invention, the second protection component 302 includes a positioning nut 3021, both sides of the positioning nut 3021 are fixedly connected to a positioning frame 3022, the two positioning frames 3022 are fixedly connected to the outside of the two positioning frames 3022, the two positioning frames 3022 are respectively fixedly connected to the two second brake plates 3024, the position of the second brake plates 3024 corresponds to the position of the brake pads 2024, the position of the trigger block 3023 corresponds to the position of the trigger switch 3015, the two positioning frames 3022 are fixedly connected to the adjustment component 304 through the positioning nuts 3021, and the adjustment component 3 04 includes a sealing cylinder 3041, a movable rod 3042 is slidably connected inside the sealing cylinder 3041, one end of the movable rod 3042 is fixedly connected to a second piston plate 3043, the size of the second piston plate 3043 corresponds to the size of the inner wall of the sealing cylinder 3041, a plurality of air holes 3044 are opened outside the sealing cylinder 3041, the sealing cylinder 3041 is fixedly connected to the mounting shell 3011, the other end of the movable rod 3042 is fixedly connected to the positioning frame 3022 through a positioning nut 3021, the sealing cylinder 3041 is connected to the connecting hole 3014 through the air hole 3044, and the pressure assembly 303 includes a sliding The sliding sleeve 3031 is slidably connected with a sliding rod 3032, the top of the sliding rod 3032 is fixedly connected with a magnetic block 3033, a counterweight block 3034 is arranged above the magnetic block 3033, and the counterweight block 3034 is a metal counterweight block. The bottom end of the sliding rod 3032 is fixedly connected with a first piston plate 3035, and the outer sleeve of the sliding rod 3032 is connected with a first spring 3036, and the two ends of the first spring 3036 are respectively fixedly connected to the top of the first piston plate 3035 and the top of the inner wall of the sliding sleeve 3031, and the sliding sleeve 3031 is fixedly connected to the inner shell 3013, and the sliding sleeve 3031 is connected to the inner shell 3013 through the connecting hole 30 14 is connected with the sealing cylinder 3041. Since a partition is arranged in the sliding sleeve 3031, when the counterweight block 3034 pulls the sliding rod 3032 to move in the sliding sleeve 3031, the first piston plate 3035 will increase the friction when contacting the partition. Combined with the elastic force of the first spring 3036 inside it, if the speed of the second pulley 2025 decreases, the first piston plate 3035 will not continue to move up when the centrifugal force is weakened. If the speed is not reduced, the first piston plate 3035 will move up again, so that the device can be divided into conventional braking and emergency braking, thereby improving the safety of the device when in use.

[0057] As another embodiment of the present invention, the centrifugal assembly 305 includes a rotating shaft 3051, the rotating shaft 3051 passes through a bearing 3052 and is fixedly connected to a plurality of elastic telescopic rods 3053, and the other ends of the plurality of elastic telescopic rods 3053 are fixedly connected to a friction block 3054, the other end of the rotating shaft 3051 passes through the mounting shell 3011 and is fixedly connected to the inner shell 3013, the bearing 3052 is clamped on one side of the mounting shell 3011, and the third protection assembly 306 includes a retaining The retaining frame 3061 is fixedly connected to the limiting cylinder 3062, and the limiting cylinder 3062 is slidably connected to the limiting rod 3063. One end of the limiting rod 3063 is fixedly connected to the magnetic plate 3064, and the other end of the limiting rod 3063 is fixedly connected to the connecting plate 3065203. The limiting rod 3063 is outer-connected with a second spring 3066. The two ends of the second spring 3066 are respectively fixedly connected to the limiting cylinder 3062 and the connecting plate 3065203. Two connecting frames 3067 are fixedly connected to the other side of the plate 3065203, and the two connecting frames 3067 are both arc-shaped, and a number of blocks 3068 are fixedly connected to the outside of the two connecting frames 3067, and the retaining frame 3061 is fixedly connected to the outside of the mounting shell 3011, and the opposite surfaces of the magnetic plate 3064 and the magnetic block 3033 repel each other, and the shapes of the several blocks 3068 are adapted to the shapes of the several slots 2026. When it is necessary to replace the internal accessories of the device for maintenance, it is only necessary to remove the bolts connected to the outside of the mounting plate 3012 to disassemble the mounting shell 3011 and the trolley shell 201, so as to replace and maintain the first piston plate 3035, the second piston plate 3043, the first brake plate 2073 and the second brake plate 3024 where faults or damages occur, thereby reducing the maintenance difficulty of the device, providing safety for subsequent use, reducing the overall replacement cost, and improving the popularization of the device.

[0058] Working principle: This embodiment provides an adjustable coal mine monorail crane centrifugal overspeed protection device. When overspeeding, the excessive rotation speed of the centrifugal component 305 will drive the pressure component 303 on the inner wall of the shell to extend, thereby extracting the air in the adjustment component 304, thereby driving the second protection component 302 to fit the sliding component 202 to form resistance, preventing the sliding component 202 from rotating. At the same time, the first protection component 207 runs to fit the sliding component 202 to form a secondary deceleration. If the centrifugal force is not weakened at this time, the pressure component 303 continues to extend, thereby pushing the third protection component 306 to jam the sliding component 202, forming a tertiary deceleration.

[0059] When the trolley housing 201 moves, the first pulley 206, the second pulley 2025 and the plurality of friction blocks 3054 will rotate due to the friction force when in contact with the rail 1. If the moving speed is too fast, the first pulley 206, the second pulley 2025 and the plurality of friction blocks 3054 will rotate too fast. At this time, the elastic force of the first spring 3036 is smaller than the centrifugal force of the counterweight block 3034 when rotating at a high speed, so that the counterweight block 3034 pulls the slide rod 3032 to move in the slide sleeve 3031, and the first piston plate 3035 extracts the air in the sealing cylinder 3041 through the air hole 3044 and the connecting hole 3014, so that the movable The movable rod 3042 slides in the sealing cylinder 3041. At this time, the positioning frame 3022 connected to the movable rod 3042 will contact the brake pad 2024 through the second brake plate 3024. At the same time, the trigger block 3023 squeezes the trigger switch 3015 to synchronously turn on the electric cylinder 2071, so that the electric cylinder 2071 drives the first brake plate 2073 to contact the brake pad 2024. The friction between the first brake plate 2073 and the second brake plate 3024 and the brake pad 2024 slows down or stops the rotation of the second pulley 2025, slows down the moving speed of the device, and completes the initial deceleration of the device.

[0060] When the first brake plate 2073 and the second brake plate 3024 fail to slow down the rotation speed of the second pulley 2025 by contacting the brake pad 2024, resulting in the centrifugal force of the counterweight block 3034 being unable to be reduced, the counterweight block 3034 will continue to slide outward from the sliding sleeve 3031. At this time, the inner shell 3013 in a rotating state will gradually approach the magnetic plate 3064 through the counterweight block 3034, so that the magnetic field of the magnetic block 3033 squeezes the magnetic plate 3064, and the magnetic plate 3064 pushes the limiting rod 3063 to slide in the limiting cylinder 3062, and the limiting cylinder 3062 pushes the connecting frame 3067 and the clamping block 3068 to quickly clamp in the plurality of clamping grooves 2026 outside the brake pad 2024, thereby directly locking the brake pad 2024.

[0061] When it is necessary to replace the internal accessories of the device for maintenance, it is only necessary to remove the bolts connected to the outside of the mounting plate 3012 to disassemble the mounting shell 3011 and the trolley shell 201, thereby replacing and maintaining the faulty or damaged locations such as the first piston plate 3035, the second piston plate 3043, the first brake plate 2073 and the second brake plate 3024.

[0062] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An adjustable coal mine monorail crane centrifugal overspeed protection device, characterized in that: include, A steel rail (1) and a trolley mechanism (2), wherein the trolley mechanism (2) comprises two trolley shells (201), four sliding assemblies (202) arranged in the two trolley shells (201), a bottom plate (203) located below the two trolley shells (201), a reinforcing rib (204), four first mounting buckles (205), four first pulleys (206) and four first protection assemblies (207), wherein the four first pulleys (206) are connected to the trolley shells (201) via the four first mounting buckles (205), and the four first protection assemblies (207) are arranged in the trolley shells (201); and, An overspeed protection mechanism (3) comprises a housing assembly (301), four pressure assemblies (303) arranged in the housing assembly (301), an adjustment assembly (304), two second protection assemblies (302) connected to the adjustment assembly (304), a centrifugal assembly (305), and a third protection assembly (306), wherein the adjustment assembly (304) is connected to the four pressure assemblies (303), the centrifugal assembly (305) is connected to the housing assembly (301), and the third protection assembly (306) is located on both sides of the housing assembly (301); The regulating assembly (304) comprises a sealing cylinder (3041), a movable rod (3042) is slidably connected inside the sealing cylinder (3041), a second piston plate (3043) is fixedly connected to one end of the movable rod (3042), the size of the second piston plate (3043) corresponds to the size of the inner wall of the sealing cylinder (3041), and a plurality of air holes (3044) are opened outside the sealing cylinder (3041); The pressure assembly (303) comprises a sliding sleeve (3031), a sliding rod (3032) is slidably connected inside the sliding sleeve (3031), a magnetic block (3033) is fixedly connected to the top of the sliding rod (3032), a counterweight block (3034) is arranged above the magnetic block (3033), and the counterweight block (3034) is a metal counterweight block, a first piston plate (3035) is fixedly connected to the bottom end of the sliding rod (3032), a first spring (3036) is connected to the outer sleeve of the sliding rod (3032), and two ends of the first spring (3036) are respectively fixedly connected to the top of the first piston plate (3035) and the top of the inner wall of the sliding sleeve (3031); The third protection component (306) comprises a retaining frame (3061), a limiting cylinder (3062) is fixedly connected inside the retaining frame (3061), a limiting rod (3063) is slidably connected inside the limiting cylinder (3062), one end of the limiting rod (3063) is fixedly connected to the magnetic plate (3064), the other end of the limiting rod (3063) is fixedly connected to the connecting plate (3065) (203), a second spring (3066) is connected to the outer shell of the limiting rod (3063), the two ends of the second spring (3066) are respectively fixedly connected to the limiting cylinder (3062) and the connecting plate (3065) (203), and two connecting frames (3067) are fixedly connected to the other side of the connecting plate (3065) (203), and the two connecting frames (3067) are both arc-shaped, and the outside of the two connecting frames (3067) are fixedly connected to a plurality of clamping blocks (3068).

2. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 1 is characterized in that: The inner wall of the trolley shell (201) is snap-connected with the two sliding components (202); the lower part of the trolley shell (201) is fixedly connected with the upper part of the bottom plate (203); the two trolley shells (201) are fixedly connected via the bottom plate (203); the bottom plate (203) is fixedly connected with the lower part of the trolley shell (201) via a reinforcing rib (204); a first pulley (206) is provided below the inner wall of the trolley shell (201); the first pulley (206) is rotatably connected with the trolley shell (201) via a first mounting buckle (205); and the inner wall of the trolley shell (201) is fixedly connected with the two first protection components (207).

3. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 2 is characterized in that: The front face of the shell component (301) is fixedly connected to the adjustment component (304), the front face of the adjustment component (304) is fixedly connected to the second protection component (302), the adjustment component (304) is in communication with four pressure components (303), and the four pressure components (303) are all fixedly connected in the shell component (301), the back face of the shell component (301) is fixedly connected to the centrifugal component (305), and the two third protection components (306) are respectively located on both sides of the shell component (301); The housing assembly (301) is fixedly connected to the inner wall of the trolley housing (201).

4. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 3 is characterized in that: The sliding assembly (202) comprises a second mounting buckle (2021), the second mounting buckle (2021) is clamped on the outside of the driving shaft (2022), the outer sleeve of the driving shaft (2022) is connected to a shaft sleeve (2023), one end of the driving shaft (2022) passes through a brake pad (224) and is fixedly connected to a second pulley (2025), and the brake pad (2024) is fixedly connected to the outside with a plurality of clamping grooves (2026); The second mounting buckle (2021) is clamped on one side of the trolley housing (201), and the shaft sleeve (2023) and the trolley housing (201) are clamped on each other.

5. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 4 is characterized in that: The first protection component (207) comprises an electric cylinder (2071), one end of the electric cylinder (2071) is fixedly connected to a protection frame (2072), and the other end of the protection frame (2072) is fixedly connected to a first brake plate (2073); The electric cylinder (2071) is fixedly connected to one side of the inner wall of the trolley housing (201), and the positions of the first brake pad (2024) and the brake pad (2024) correspond to each other.

6. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 5 is characterized in that: The housing assembly (301) comprises a mounting shell (3011), an inner shell (3013) being rotatably connected inside the mounting shell (3011), a plurality of mounting plates (3012) being fixedly connected outside the mounting shell (3011), a plurality of connection holes (3014) being provided inside the inner shell (3013), and two trigger switches (3015) being fixedly connected to the front side of the mounting shell (3011); The mounting shell (3011) is fixedly connected to the inner wall of the trolley housing (201) via a mounting plate (3012) and bolts, the inner shell (3013) is fixedly connected to the centrifugal assembly (305), the four pressure assemblies (303) are connected to the adjustment assembly (304) via a connecting hole (3014), and the trigger switch (3015) is connected to the electric cylinder (2071) via a signal.

7. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 6 is characterized in that: The second protection component (302) comprises a positioning nut (3021), both sides of the positioning nut (3021) are fixedly connected to positioning frames (3022), the outsides of the two positioning frames (3022) are fixedly connected to trigger blocks (3023), and the two positioning frames (3022) are respectively fixedly connected to two second brake plates (3024); The position of the second brake plate (3024) corresponds to the position of the brake pad (2024), the position of the trigger block (3023) corresponds to the position of the trigger switch (3015), and the two positioning frames (3022) are fixedly connected to the adjustment component (304) via positioning nuts (3021); The sealing cylinder (3041) is fixedly connected to the mounting shell (3011), the other end of the movable rod (3042) is fixedly connected to the positioning frame (3022) via a positioning nut (3021), and the sealing cylinder (3041) is connected to the connecting hole (3014) via an air hole (3044).

8. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 7 is characterized in that: The sliding sleeve (3031) is fixedly connected inside the inner shell (3013), and the sliding sleeve (3031) is connected to the sealing cylinder (3041) through the connecting hole (3014).

9. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 8 is characterized in that: The centrifugal assembly (305) comprises a rotating shaft (3051), the rotating shaft (3051) passes through a bearing (3052) and is fixedly connected to a plurality of elastic telescopic rods (3053), and the other ends of the plurality of elastic telescopic rods (3053) are fixedly connected to friction blocks (3054); The other end of the rotating shaft (3051) passes through the mounting shell (3011) and is fixedly connected to the inner shell (3013), and the bearing (3052) is clamped on one side of the mounting shell (3011).

10. The adjustable coal mine monorail crane centrifugal overspeed protection device according to claim 9, characterized in that: The retaining frame (3061) is fixedly connected to the outside of the mounting shell (3011), the opposing surfaces of the magnetic plate (3064) and the magnetic block (3033) repel each other, and the shapes of the plurality of clamping blocks (3068) are adapted to the shapes of the plurality of clamping slots (2026).

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