Fail-safe wire rope brake

Abstract

This invention provides a fail-safe wire rope brake that uses a linkage structure to transmit and convert the spring's restoring force into the driving force of the pushing device. The brake includes a mounting frame, relatively movable upper and lower braking assemblies, a pushing device with a push rod, a spring assembly, and a linkage structure. The linkage structure consists of a transmission rod, a reset rod, a driving rod, and two sets of connecting parts. The first connecting part connects the transmission rod and the reset rod with a first support as a fulcrum, and the second connecting part connects the driving rod and the reset rod with a second support as a fulcrum, thus achieving switching between braking and releasing the brake. When the pushing device is functioning normally, the push rod drives the upper braking assembly to release the brake; when the pushing device fails, the spring assembly automatically drives the brake through the linkage structure. This design improves braking reliability, has a compact structure, and effectively reduces equipment height.

Description

Technical Field

[0001] This utility model belongs to the field of wire rope braking technology, specifically a fail-safe wire rope brake. Background Technology

[0002] A wire rope brake is a device used to control the movement of a wire rope, enabling it to brake and release. It is widely used in underground coal mine hoisting equipment, such as hoist cars and shuttle cars. This device plays a crucial safety protection role in underground coal mine operations, effectively controlling the tension of the wire rope during equipment operation or shutdown to prevent accidental slippage or loss of control, thereby ensuring the safety of personnel and equipment.

[0003] Existing wire rope brakes typically provide the necessary braking force by mounting a large hydraulic cylinder above. The hydraulic cylinder acts directly on the braking components, creating a clamping force on the wire rope, thereby achieving braking. This type of brake has a relatively simple structure and provides a large braking force, meeting the basic braking requirements of downhole equipment for wire ropes.

[0004] However, existing wire rope brakes have several shortcomings: firstly, the hydraulic cylinders are large, resulting in a high overall height of the device, occupying a large amount of space, and making the structure less compact; secondly, the device lacks automatic braking function in the event of failure, posing certain safety hazards. Therefore, there is still a need for a wire rope brake that is compact in structure, easy to maintain, and has fail-safe characteristics to adapt to the confined space and high safety requirements of underground coal mine working environments. Utility Model Content

[0005] The purpose of this invention is to provide a fail-safe wire rope brake that solves the problems of existing technologies having large space requirements and being non-fail-safe structures.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a fail-safe wire rope brake, comprising:

[0007] Mounting rack;

[0008] An upper braking assembly and a lower braking assembly, wherein the upper braking assembly is movable relative to the lower braking assembly to clamp or release the wire rope;

[0009] A pushing device for driving the upper braking assembly away from the lower braking assembly to release the brake, having a push rod that can reciprocate along a first direction, the first direction being the relative movement direction of the upper and lower braking assemblies.

[0010] A spring assembly for applying a restoring force to the upper brake assembly toward the lower brake assembly in the event of failure of the actuation device;

[0011] A linkage structure for pushing the upper brake assembly closer to the lower brake assembly under the action of the spring assembly to brake, comprising:

[0012] The transmission rod is connected to the upper braking assembly;

[0013] The reset rod is connected to the spring assembly;

[0014] The drive rod is connected to the push rod of the pushing device;

[0015] The first connecting member connects the transmission rod and the reset rod, and uses the first bracket as a fulcrum to realize the motion transmission between the transmission rod and the reset rod;

[0016] The second connector connects the drive rod and the reset rod, and uses the second bracket as a fulcrum to realize the motion transmission between the drive rod and the reset rod;

[0017] The first bracket and the second bracket are fixed on the mounting bracket.

[0018] In one possible embodiment, the actuating device is a hydraulic cylinder, a pneumatic cylinder, or an electro-hydraulic actuator, and the housing of the actuating device is fixed to the mounting bracket.

[0019] In one possible embodiment, the mounting bracket is provided with a mounting seat for fixing the pushing device, and the mounting seat is detachably mounted on the mounting bracket.

[0020] In one possible embodiment, the spring assembly includes at least one compression spring or disc spring assembly, with a movable pressure plate connected to one end of the spring assembly and a fixed plate connected to the other end of the spring assembly. The fixed plate is fixed to the mounting bracket, and the reset rod is connected to the movable pressure plate.

[0021] In one possible embodiment, the movable pressure plate is provided with at least one guide rod, the compression spring or disc spring assembly is sleeved on the corresponding guide rod, the number of guide rods corresponds to the number of compression springs or disc spring assemblies, and the fixed plate is provided with a through hole, through which the free end of the guide rod passes.

[0022] In one possible embodiment, the mounting bracket has a top plate with three through holes. The reset rod, transmission rod, and drive rod are movably disposed in their respective through holes. The two ends of the first connector are hinged to one end of the transmission rod and the reset rod, respectively, and the middle part of the first connector is hinged to the first bracket. The two ends of the second connector are hinged to one end of the drive rod and the reset rod, respectively, and the middle part of the second connector is hinged to the second bracket. The first bracket and the second bracket are fixed on the top plate.

[0023] The beneficial effects of this invention are as follows: It employs a fail-safe design, automatically driving the brakes when the pusher fails, thus improving braking reliability. The linkage structure design enables the transmission of the spring assembly's restoring force and the pusher's thrust, resulting in a compact overall structure and reduced equipment height. Attached Figure Description

[0024] Figure 1 A perspective view of a fail-safe wire rope brake provided in an embodiment of this utility model.

[0025] Figure 2 This is a front view of a fail-safe wire rope brake provided in an embodiment of the present invention.

[0026] The text labels in the figure represent: 1. Top plate; 2. Upper brake assembly; 3. Lower brake assembly; 4. Spring assembly; 5. Guide rod; 6. Reset rod; 7. Drive rod; 8. Second bracket; 9. Second connector; 10. First bracket; 11. First connector; 12. Transmission rod; 13. Brake assembly mounting plate; 14. Steel wire rope; 15. Guide structure. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0028] like Figure 1 As shown, this embodiment discloses a fail-safe wire rope brake, the core function of which is to release the brake during normal equipment operation and automatically clamp the wire rope 14 to achieve braking in the event of equipment failure. The brake mainly consists of a mounting frame, a connecting rod structure, a braking assembly, a spring assembly 4, and a pushing device, with each part working together to control the braking state.

[0029] The mounting bracket includes a top plate 1, a brake assembly mounting plate 13, and a bottom fixing plate. The lower brake assembly 3 is fixedly mounted below the brake assembly mounting plate 13, and the upper brake assembly 2 is movably mounted on the brake assembly mounting plate 13 in the direction toward the lower brake assembly 3. A guide structure 15 is fixed on the brake assembly mounting plate 13, and the upper brake assembly 2 moves up and down guided by this guide structure 15. The bottom fixing plate is fixed to the lower end of the brake assembly mounting plate 13.

[0030] In some embodiments, the top plate 1, the brake assembly mounting plate 13, and the bottom fixing plate are fixed together by bolts or welding. The top plate 1 is located at the top of the mounting bracket and is used to mount the fulcrum component of the linkage structure. Guide holes are provided on the top plate 1 to guide the reset rod 6, transmission rod 12, and drive rod 7 of the linkage structure, which is positioned above the top plate 1. The brake assembly mounting plate 13 is vertically fixed below the top plate 1 and serves as the mounting carrier for the upper brake assembly 2 and the lower brake assembly 3. Guide structures 15 (which can be guide rails or guide holes) are fixed to its surface to guide the upper brake assembly 2. The bottom fixing plate is horizontally fixed to the lower end of the brake assembly mounting plate 13 to support the bottom of the spring assembly 4 and provide a through-pass for the guide rod 5.

[0031] refer to Figure 1 and 2 In some embodiments, the braking assembly is an actuating component that directly acts on the wire rope 14, including an upper braking assembly 2 and a lower braking assembly 3. The lower braking assembly 3 is fixed to the underside of the braking assembly mounting plate 13 by bolts or welding, and its braking surface is in contact with the lower surface of the wire rope 14. The upper braking assembly 2 is slidably engaged with the guide structure 15 on the braking assembly mounting plate 13, and can reciprocate along the vertical direction of the guide structure 15 towards the lower braking assembly 3. The braking surface of the upper braking assembly 2 corresponds to the upper surface of the wire rope 14, and when moving downwards, it cooperates with the lower braking assembly 3 to clamp the wire rope 14 to achieve braking.

[0032] In some embodiments, brake friction blocks are provided on the opposing surfaces of the upper brake assembly 2 and the lower brake assembly 3. These brake friction blocks are used to fit against the upper and lower surfaces of the wire rope 14 to achieve braking of the wire rope 14.

[0033] In some possible embodiments, the spring assembly 4 includes two compression springs or optional disc spring assemblies arranged with parallel axes. The upper end of the spring assembly 4 abuts against a movable pressure plate, and the lower end abuts against a bottom fixed plate. Two guide rods 5 are fixed on the movable pressure plate, and the compression springs or disc spring assemblies are sleeved on the corresponding guide rods 5. The lower ends of the guide rods 5 pass through the through holes of the bottom fixed plate and extend outward, ensuring stable axial extension and contraction of the spring and avoiding uneven loading. The movable pressure plate is fixedly connected to the reset rod 6 in the linkage structure, and the compression and release of the spring assembly 4 are achieved by the up and down movement of the reset rod 6.

[0034] In some embodiments, the linkage structure comprises a transmission rod 12, a reset rod 6, a drive rod 7, and a connecting rod. The lower end of the transmission rod 12 is fixedly connected to the upper braking assembly 2, and its upper end has a hinge hole, connecting it to the reset rod 6 via a first connecting member 11. The lower end of the reset rod 6 is fixedly connected to the movable pressure plate, and its upper end has a hinge hole, connecting it to the transmission rod 12 via the first connecting member 11 and to the drive rod 7 via a second connecting member 9. The first connecting member 11 has two ends hinged to the hinge holes of the transmission rod 12 and the reset rod 6 via pins, and its middle portion hinged to a first bracket 10 fixed to the top plate 1 via a shaft hole, wherein the first bracket 10 serves as a lever fulcrum. The second connecting member 9 has two ends hinged to the hinge holes of the reset rod 6 and the drive rod 7 via pins, and its middle portion hinged to a second bracket 8 fixed to the top plate 1 via a shaft hole, wherein the second bracket 8 serves as a lever fulcrum.

[0035] In practical use, the first connecting member 11 forms a lever with the first bracket 10 as the fulcrum. When the reset rod 6 moves downward, the first connecting member 11 drives the transmission rod 12 upward to release the brake; when the reset rod 6 moves upward, the first connecting member 11 drives the transmission rod 12 downward to apply the brake. The second connecting member 9 forms a lever with the second bracket 8 as the fulcrum. When the drive rod 7 moves upward, the second connecting member 9 drives the reset rod 6 downward to compress the spring assembly 4 to store energy; when the drive rod 7 is not under force, the spring 4 resets and pushes the reset rod 6 upward, that is, the drive rod 7 moves downward through the second connecting member 9.

[0036] In some embodiments, the actuating device provides the active force for releasing the brake and may be a cylinder, hydraulic cylinder, or electro-hydraulic actuator. In some possible embodiments, a push rod device mounting base is also installed below the top plate 1. In some embodiments, this push rod device mounting base is detachably mounted below the top plate 1 by fasteners such as screws, allowing for quick replacement of the actuator.

[0037] During normal operation: the pusher extends the push rod, causing the drive rod 7 to move upward, and the reset rod 6 moves downward through the lever action of the second connecting piece 9, compressing the spring assembly 4 to store energy; at the same time, the reset rod 6 drives the transmission rod 12 to move upward through the lever action of the first connecting piece 11, causing the upper brake assembly 2 to move upward and disengage from the wire rope 14, releasing the brake.

[0038] When the equipment fails: the push device loses power, the push rod retracts under the reset force of the spring assembly 4, and the drive rod 7 moves down; the spring assembly 4 releases stored energy to push the reset rod 6 up, and through the lever action of the first connecting piece 11, it drives the transmission rod 12 down, so that the upper braking assembly 2 moves down and cooperates with the lower braking assembly 3 to clamp the wire rope 14, thereby achieving braking.

[0039] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A fail-safe wire rope brake, characterized in that, include: Mounting rack; An upper braking assembly and a lower braking assembly, wherein the upper braking assembly is movable relative to the lower braking assembly to clamp or release the wire rope; A pushing device is used to drive the upper braking assembly away from the lower braking assembly to release the brake; A spring assembly for applying a restoring force to the upper brake assembly toward the lower brake assembly in the event of failure of the actuation device; A linkage structure for pushing the upper brake assembly closer to the lower brake assembly under the action of the spring assembly to brake, comprising: The transmission rod is connected to the upper braking assembly; The reset rod is connected to the spring assembly; The drive rod is connected to the push rod of the pushing device; The first connecting member connects the transmission rod and the reset rod, and uses the first bracket as a fulcrum to realize the motion transmission between the transmission rod and the reset rod; The second connector connects the drive rod and the reset rod, and uses the second bracket as a fulcrum to realize the motion transmission between the drive rod and the reset rod; The first bracket and the second bracket are fixed on the mounting bracket.

2. The fail-safe wire rope brake according to claim 1, characterized in that, The pushing device is a hydraulic cylinder, a pneumatic cylinder, or an electro-hydraulic actuator, and the housing of the pushing device is fixed on the mounting bracket.

3. The fail-safe wire rope brake according to claim 2, characterized in that, The mounting frame is provided with a fixing seat for fixing the pushing device, and the fixing seat can be detachably installed on the mounting frame.

4. The fail-safe wire rope brake according to claim 1, characterized in that, The spring assembly includes at least one compression spring or disc spring assembly. A movable pressure plate is connected to one end of the spring assembly, and a fixed plate is connected to the other end of the spring assembly. The fixed plate is fixed on the mounting bracket, and the reset rod is connected to the movable pressure plate.

5. The fail-safe wire rope brake according to claim 4, characterized in that, At least one guide rod is provided on the movable pressure plate, and the compression spring or disc spring assembly is sleeved on the corresponding guide rod. The number of guide rods corresponds to the number of compression springs or disc spring assemblies. A through hole is provided on the fixed plate, and the free end of the guide rod passes through the through hole.

6. The fail-safe wire rope brake according to claim 1, characterized in that, The mounting bracket has a top plate with three through holes. The reset rod, transmission rod, and drive rod are movably disposed in their respective through holes. The two ends of the first connector are hinged to one end of the transmission rod and the reset rod, respectively, and the middle part of the first connector is hinged to the first bracket. The two ends of the second connector are hinged to one end of the drive rod and the reset rod, respectively, and the middle part of the second connector is hinged to the second bracket. The first bracket and the second bracket are fixed to the top plate.

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