Damping device for coal mining machine for coal mine

Abstract

The utility model provides a damping device for a coal mining machine for a coal mine, which comprises a bottom plate and a coal mining machine mounting plate arranged above the bottom plate, and a damping component for buffering the coal mining machine mounting plate is arranged above the bottom plate. A consumption assembly used for buffering and dispersing vibration force borne by the damping assembly is arranged between the bottom plate and the coal mining machine mounting plate, the consumption assembly comprises a set of transverse plates arranged below the coal mining machine mounting plate and connected with the damping assembly, and the bottom face of each transverse plate is fixedly connected with a set of L-shaped extrusion plates; and a stop block is arranged below each L-shaped extrusion plate. Through the arranged consumption assembly, part of vibration force borne by the damping assembly can be converted into elastic potential energy for extruding the spring, so that part of vibration force acting on the damper and the buffer spring is subjected to dispersion and energy conversion, the working load of the damper and the buffer spring is greatly reduced, and the service life of the damper and the buffer spring is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of vibration reduction technology for coal mining machines, and in particular to a vibration reduction device for coal mining machines. Background Technology

[0002] In coal mining operations, the coal mining machine is the core equipment and undertakes the key task of coal mining. However, due to the complex and changeable geological conditions underground, the coal mining machine is affected by vibrations from many aspects during operation. On the one hand, when the coal mining machine cuts coal, the interaction between the cutting teeth and the coal and rock will generate high-frequency vibrations. On the other hand, during the movement of the working face, the uneven floor, the undulation of the roadway, and the operation of the equipment itself will all cause vibrations.

[0003] Application No. 202321827214.7 discloses a vibration damping device for coal mining machines, including a mounting base, a positioning cylinder, a sliding cylinder, a mounting plate, a spring, a damper, and an adjustment structure. This utility model, by incorporating an adjustment structure, allows for adjustment of the spring when needed. A special tool is used to rotate the rotating component, causing the threaded sleeve to move vertically up and down along the surface of the adjusting screw. This, in turn, drives the adjustment plate to adjust the spring and damper. When the adjustment plate moves upward, it stretches the spring and damper, causing the spring to become softer due to the reduced elastic force. Conversely, when the adjustment plate moves downward, it compresses the spring and damper, increasing the spring's elastic force and making it stiffer. This allows for adjustment of the spring after installation, avoiding the need to disassemble and adjust the vibration damping device when spring adjustment is required, resulting in more convenient adjustment.

[0004] The above solution has shortcomings in use. When the coal mining machine vibrates, the vibration force will be entirely applied to the springs and dampers, and the vibration force applied to the springs and dampers cannot be further consumed and dispersed. Under the continuous high intensity of vibration, the service life of the springs and dampers will be shortened. Therefore, we provide a vibration damping device for coal mining machines. Utility Model Content

[0005] This utility model provides a shock absorption device for coal mining machines to solve the technical problems existing in the background art.

[0006] The purpose and effect of this utility model for a shock-absorbing device for a coal mining machine are achieved by the following specific technical means: A shock-absorbing device for a coal mining machine includes a base plate and a coal mining machine mounting plate disposed above the base plate. A shock-absorbing component for buffering the coal mining machine mounting plate is disposed above the base plate. A consumable component for buffering and dispersing the vibration force borne by the shock-absorbing component is disposed between the base plate and the coal mining machine mounting plate. The consumable component includes a set of horizontal plates disposed below the coal mining machine mounting plate and connected to the shock-absorbing component. A set of L-shaped extrusion plates is fixedly connected to the bottom surface of each horizontal plate. A blocking block is disposed below each L-shaped extrusion plate.

[0007] The consumable component also includes a dispersion structure disposed above the base plate to absorb vibration force when the L-shaped extrusion plate is lowered.

[0008] Preferably, the shock absorption assembly includes a set of sliding columns installed on the bottom surface of the coal mining machine mounting plate. Each sliding column has a damper installed at its bottom end, and the bottom end of the damper is connected to the upper surface of the base plate. Each damper is fitted with a buffer spring, the top end of each buffer spring is connected to the bottom end of the sliding column, and the bottom end of each buffer spring is connected to the upper surface of the base plate.

[0009] Preferably, each damper is fitted with a guide cylinder on its exterior, the bottom end of each guide cylinder is connected to the upper surface of the base plate, and the inner wall of the guide cylinder is slidably connected to the outer surface of the sliding column.

[0010] Preferably, a reinforcing plate is fixedly connected to the outer surface of each group of guide cylinders.

[0011] Preferably, the distributed structure of the consumable component includes a set of fixed cylinders disposed above the base plate. Each fixed cylinder is provided with a compression spring inside. Each compression spring is fixedly connected to a sliding rod at both ends. The ends of each set of sliding rods that are far apart from each other are respectively connected to the sides of each set of blocking blocks that are close to each other.

[0012] Preferably, each of the fixed cylinders has a set of stabilizing grooves on its outer surface, and each stabilizing groove has a slidably connected stabilizing block on its inner wall. The bottom end of each stabilizing block is connected to the outer surface of the slide rod.

[0013] Preferably, a set of vertical plates are fixedly connected to the outer surface of each of the fixed cylinders, and the bottom end of each vertical plate is connected to the upper surface of the base plate.

[0014] Preferably, each set of uprights has an X-shaped plate fixedly connected to one side of each other that is close to the other.

[0015] Beneficial effects:

[0016] 1. The vibration damping components can achieve the effect of vibration reduction for the coal mining machine above the mounting plate. The consumable components can convert part of the vibration force borne by the vibration damping components into the elastic potential energy of the compression spring, thereby dispersing and converting part of the vibration force acting on the damper and buffer spring, greatly reducing the working load of the damper and buffer spring, and effectively extending their service life.

[0017] 2. The stabilizing groove and stabilizing block work together to guide the slide bar, thereby keeping the blocking block aligned with the L-shaped extrusion plate, ensuring that the L-shaped extrusion plate can stably and efficiently transmit the vibration force to the blocking block. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0019] Figure 2 This is a three-dimensional structural diagram of the guide cylinder of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the sliding column of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the consumable component of this utility model.

[0022] Figure 5 This is a three-dimensional structural schematic diagram of the orthographic section of the fixing cylinder of this utility model.

[0023] Figure 1-5 In the diagram, the correspondence between component names and drawing numbers is as follows:

[0024] 1. Base plate; 2. Coal mining machine mounting plate; 3. Vibration damping components; 301. Sliding column; 302. Damper; 303. Buffer spring; 304. Guide cylinder; 305. Reinforcing plate; 4. Consumable components; 401. Horizontal plate; 402. L-shaped extrusion plate; 403. Blocking block; 404. Fixing cylinder; 405. Extrusion spring; 406. Sliding rod; 407. Stabilizing groove; 408. Stabilizing block; 409. Vertical plate; 410. X-shaped plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] As attached Figure 1 To be continued Figure 3 As shown: A vibration damping device for a coal mining machine includes a base plate 1 and a coal mining machine mounting plate 2 disposed above the base plate 1. A vibration damping assembly 3 for buffering the coal mining machine mounting plate 2 is disposed above the base plate 1. The vibration damping assembly 3 includes a set of sliding columns 301 mounted on the bottom surface of the coal mining machine mounting plate 2. A damper 302 is mounted at the bottom end of each sliding column 301, and the bottom end of the damper 302 is connected to the upper surface of the base plate 1. A buffer spring 303 is sleeved on the outside of each damper 302. The top of each buffer spring 303 is connected to the bottom of the slide column 301, and the bottom of each buffer spring 303 is connected to the upper surface of the base plate 1. When the coal mining machine vibrates, the coal mining machine mounting plate 2 applies the impact force generated by the vibration vertically to the slide columns 301 that are evenly distributed below. The damper 302 consumes the vibration energy through the flow of hydraulic oil, and the buffer spring 303 absorbs the remaining energy through elastic deformation. The two work together to effectively reduce the vibration amplitude of the coal mining machine and ensure the stability of the equipment operation.

[0027] As attached Figure 2 As shown: Each damper 302 is fitted with a guide cylinder 304 on its outside. The bottom end of each guide cylinder 304 is connected to the upper surface of the base plate 1, and the inner wall of the guide cylinder 304 is slidably connected to the outer surface of the sliding column 301. The guide cylinder 304 can stably guide the sliding column 301, which can ensure the smooth lifting and lowering of the coal mining machine mounting plate 2. The outer surface of each group of guide cylinders 304 is fixedly connected with a reinforcing plate 305. The reinforcing plate 305 can connect the guide cylinders 304 to each other, further enhancing the strength of the guide cylinders 304.

[0028] As attached Figure 1 Appendix Figure 4 With appendix Figure 5As shown: A consumable component 4 is provided between the base plate 1 and the coal mining machine mounting plate 2 to buffer and disperse the vibration force borne by the shock absorption component 3. The consumable component 4 includes a set of horizontal plates 401 located below the coal mining machine mounting plate 2 and connected to the shock absorption component 3. The two ends of the horizontal plates 401 are connected to the sliding columns 301. A set of L-shaped extrusion plates 402 are fixedly connected to the bottom surface of each horizontal plate 401. The bottom end of the L-shaped extrusion plates 402 is set in a V-shape. A blocking block 403 is provided below each L-shaped extrusion plate 402. The blocking block 403 and the L-shaped extrusion plate 402 are connected to each other. The bottom end of the pressure plate 402 is also V-shaped, allowing the L-shaped pressure plate 402 to smoothly press against the blocking block 403 when it descends. The consumable component 4 also includes a dispersion structure disposed above the base plate 1 to absorb the vibration force when the L-shaped pressure plate 402 descends. The dispersion structure of the consumable component 4 includes a set of fixed cylinders 404 disposed above the base plate 1. Each fixed cylinder 404 has a compression spring 405 inside, and each compression spring 405 has a sliding rod 406 fixedly connected to its left and right ends. Each set of sliding rods 406 is spaced apart from each other. One end is connected to the side of each group of blocking blocks 403 that are close to each other. When the sliding column 301 is displaced vertically under the action of vibration, the horizontal plate 401 will simultaneously drive the L-shaped compression plate 402 to move towards the blocking block 403 and compress it. Part of the vibration force that originally acted on the sliding column 301, damper 302 and buffer spring 303 is effectively dispersed to the blocking block 403. After being compressed, the blocking block 403 will push the sliding rod 406 connected to it to compress the compression spring 405, converting the vibration force into the elastic potential energy of the spring. When the L-shaped compression plate 402 moves to below the blocking block 403 as the sliding column 301 moves, the vibration gradually weakens. As the vibration gradually weakens, the pressure on the blocking block 403 decreases, and the compression spring 405 begins to release the stored elastic potential energy, pushing the sliding rod 406 to reset, which in turn drives the blocking block 403 to return to its original position. This can disperse and convert the vibration force that was originally concentrated on the damper 302 and the buffer spring 303, greatly reducing the workload of the damper 302 and the buffer spring 303 and effectively extending their service life.

[0029] As attached Figure 4 As shown: A set of vertical plates 409 are fixedly connected to the outer surface of each fixed cylinder 404. The bottom end of each vertical plate 409 is connected to the upper surface of the base plate 1. The vertical plates 409 can support the fixed cylinder 404 and stabilize the position of the blocking block 403, aligning it with the L-shaped extrusion plate 402. An X-shaped plate 410 is fixedly connected to the side of each set of vertical plates 409 that are close to each other. The X-shaped plate 410 can reinforce the connection between the vertical plates 409 and enhance the firmness between the vertical plates 409.

[0030] As attached Figure 5As shown: Each fixed cylinder 404 has a set of stabilizing grooves 407 on its outer surface. Each stabilizing groove 407 has a slidably connected stabilizing block 408 on its inner wall. The bottom end of each stabilizing block 408 is connected to the outer surface of the slide rod 406. By using the cooperation of the stabilizing grooves 407 and the stabilizing blocks 408, the slide rod 406 can be guided, so that the blocking block 403 and the L-shaped extrusion plate 402 are kept aligned, ensuring that the L-shaped extrusion plate 402 can stably and efficiently transmit the vibration force to the blocking block 403.

[0031] Working Principle: First, the coal mining machine is installed on the upper surface of the coal mining machine mounting plate 2. When the coal mining machine vibrates, the mounting plate 2 applies the impact force generated by the vibration vertically to the evenly distributed sliding columns 301 below. The damper 302 dissipates the vibration energy through the flow of hydraulic oil, while the buffer spring 303 absorbs the remaining energy through elastic deformation. The two work together to effectively reduce the vibration amplitude of the coal mining machine and ensure the stability of the equipment operation. At the same time, when the sliding column 301 undergoes vertical displacement under the action of vibration force, it will drive the horizontal plate 401 to move synchronously through the transmission connector. The L-shaped extrusion plate 402 will move synchronously towards the blocking block 403 and extrude it. When the L-shaped extrusion plate 402 contacts and extrudes the blocking block 403, the energy originally acting on the sliding column 301 and damper 302 is reduced. Part of the vibration force on the damper 303 is effectively dispersed to the blocking block 403. After being squeezed, the blocking block 403 pushes the connected slide rod 406 to compress the compression spring 405, converting the vibration force into the elastic potential energy of the spring and storing it. When the L-shaped compression plate 402 moves to below the blocking block 403 with the displacement of the slide rod 301, the vibration gradually weakens, the pressure on the blocking block 403 decreases, the compression spring 405 begins to release the stored elastic potential energy, pushes the slide rod 406 to reset, and then drives the blocking block 403 to return to its original position. This can disperse and convert the vibration force that was originally concentrated on the damper 302 and the buffer spring 303, greatly reducing the workload of the damper 302 and the buffer spring 303 and effectively extending their service life.

Claims

1. A damping device for a coal mining machine, comprising a base plate (1) and a coal mining machine mounting plate (2) arranged above the base plate (1), characterized in that: The upper side of the bottom plate (1) is provided with a damping assembly (3) for buffering the coal mining machine mounting plate (2), the bottom plate (1) and the coal mining machine mounting plate (2) are provided with a consumption assembly (4) for buffering and dispersing the vibration force borne by the damping assembly (3), the consumption assembly (4) comprises a group of horizontal plates (401) arranged below the coal mining machine mounting plate (2) and connected with the damping assembly (3), the bottom surface of each horizontal plate (401) is fixedly connected with a group of L-shaped extrusion plates (402), and the lower side of each L-shaped extrusion plate (402) is provided with a blocking block (403). The consumption assembly (4) further comprises a dispersion structure arranged above the bottom plate (1) for consuming the vibration force when the L-shaped extrusion plate (402) descends.

2. The coal mine shearer shock absorbing device according to claim 1, characterized in that: The damping assembly (3) comprises a group of slide columns (301) mounted on the bottom surface of the coal mining machine mounting plate (2), the bottom end of each slide column (301) is provided with a damper (302), the bottom end of the damper (302) is connected with the upper surface of the bottom plate (1), the outer side of each damper (302) is sleeved with a buffer spring (303), the top end of each buffer spring (303) is connected with the bottom end of the slide column (301), and the bottom end of each buffer spring (303) is connected with the upper surface of the bottom plate (1).

3. A coal mine shearer shock absorbing device according to claim 2, characterised in that: The outer side of each damper (302) is sleeved with a guide cylinder (304), the bottom end of each guide cylinder (304) is connected with the upper surface of the bottom plate (1), and the inner wall of the guide cylinder (304) is in sliding connection with the outer surface of the slide column (301).

4. The coal mine shearer shock absorbing device according to claim 3, characterized in that: The outer surfaces of each group of guide cylinders (304) are fixedly connected with a reinforcing plate (305) in common.

5. The coal mine-used shearer shock absorber according to claim 1, characterized in that: The dispersion structure of the consumption assembly (4) comprises a group of fixed cylinders (404) arranged above the bottom plate (1), the inner side of each fixed cylinder (404) is provided with an extrusion spring (405), the left and right ends of each extrusion spring (405) are fixedly connected with a slide rod (406), and the mutually faraway ends of each group of slide rods (406) are connected with the mutually close sides of each group of blocking blocks (403).

6. The coal mine shearer shock absorbing device according to claim 5, characterized in that: The outer surface of each fixed cylinder (404) is provided with a group of stabilizing grooves (407), the inner wall of each stabilizing groove (407) is in sliding connection with a stabilizing block (408), and the bottom end of each stabilizing block (408) is connected with the outer surface of the slide rod (406).

7. The coal mine-used shearer shock absorber according to claim 5, characterized in that: The outer surface of each fixed cylinder (404) is fixedly connected with a group of vertical plates (409), and the bottom end of each vertical plate (409) is connected with the upper surface of the bottom plate (1).

8. A coal mine shearer shock absorbing device as claimed in claim 7 wherein: The mutually close sides of each group of vertical plates (409) are fixedly connected with an X-shaped plate (410) in common.

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