Shock isolation device for coal mine safety production

Abstract

The invention provides a shock isolation device for coal mine safety production, and belongs to the field of coal mine safety. The shock isolation device comprises a lift car body, and a lift car base is fixedly mounted at the lower end of the lift car body; a through hole is formed in the middle of the lift car base in a penetrating mode, and a latticed bearing plate is vertically installed at the through hole in a sliding mode. A bottom pile box is fixedly installed below the lift car base, a shock isolation box with an upward opening is vertically installed in the bottom pile box in a sliding mode, at least two cart locking mechanisms are arranged in the shock isolation box, and a shock absorption mechanism is arranged on the bottom face of the shock isolation box. The anti-vibration device has the beneficial effects that the wheels of the coal car can be blocked, and the wheels are effectively prevented from moving relative to the lift car when being vibrated.

Description

Technical Field

[0001] The invention belongs to the field of coal mine safety, and in particular relates to a seismic isolation device for safe production in coal mines. Background Art

[0002] Coal mines are areas where humans mine coal resources in coal-rich mining areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, it is generally chosen to dig tunnels underground to mine coal, which is an underground coal mine; when the coal seam is very close to the surface, it is generally chosen to directly strip the surface soil layer to mine coal, which is an open-pit coal mine.

[0003] At present, when mining in underground coal mines, it is often necessary to use a car installed in the shaft to transport coal trucks loaded with coal. However, due to the complexity of the working environment of the coal mine, the car is often vibrated when running in the shaft.

[0004] Therefore, it is necessary to set a shock-absorbing structure at the position of the car to reduce the shaking amplitude of the cart in the car, prevent the coal in the coal truck from spilling out, and prevent the coal truck from causing harm to the people inside. However, most shock-absorbing devices on the market can only perform shock-absorbing treatment on the entire car, and cannot perform seismic isolation treatment on the coal truck placed in the car alone. Therefore, during the transportation process, there is still a problem that the wheels of the coal truck are easy to roll in the car and cause harm to the people inside. Summary of the invention

[0005] The purpose of the present invention is to propose and design a seismic isolation device for safe production in coal mines, aiming at the phenomenon that the existing coal trucks are prone to vibrate and roll along with the car during transportation, so as to solve the above problems and ensure the stability of the coal trucks.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a seismic isolation device for safe production in coal mines, which includes a car body, a car base is fixedly installed at the lower end of the car body; a through hole is penetrated in the middle of the car base, and a grid-shaped bearing plate is vertically slidably installed at the through hole; a bottom pile box is fixedly installed below the car base, and a seismic isolation box with an upward opening is vertically slidably installed inside the bottom pile box, at least two trolley locking mechanisms are arranged in the seismic isolation box, and a shock-absorbing mechanism is arranged on the bottom surface of the seismic isolation box, and the shock-absorbing mechanism plays a shock-absorbing role, and the trolley locking mechanism plays the role of fixing the coal truck, thereby preventing it from rolling in the car.

[0007] Furthermore, the trolley locking mechanism includes an offset plate vertically slidably installed in the seismic isolation box, at least two spiral track plates are fixedly installed on the upper surface of the offset plate, at least two distance rods are also fixedly installed on the upper surface of the offset plate, and the upper end of the distance rod passes through the offset plate and is sleeved with a spring, and the lower end of the distance rod passes through the offset plate, the seismic isolation box, and the bottom pile box in sequence and is sleeved with a spring; it also includes an inserted column vertically slidably installed in the cavity of the bearing plate, the middle part of the inserted column is vertically penetrated by an axial hole, a vertical rod is vertically slidably installed in the axial hole, the lower end of the vertical rod protrudes from the axial hole, and a spring and a longitudinal rod are sequentially arranged from top to bottom, and a matching hole is opened in the middle part of the longitudinal rod, and the matching hole is at the position of the offset plate The corresponding spiral track plates are aligned; the upper end of the column is provided with two wheel-blocking rods in a circular array with the shaft hole as the center, the wheel-blocking rod is horizontally slidably installed on the upper end of the column, and a spring whose stretching direction is parallel to the moving direction of the wheel-blocking rod is connected between the wheel-blocking rod and the column, and a pull rope is connected between the end of the wheel-blocking rod and the end of the vertical rod; the left and right sides or the front and back sides of the column are provided with slots, and an insert block is vertically slidably installed in the slot, and a spring is connected between the lower end of the insert block and the lower slot wall of the slot, and the side of the insert block is fixedly connected to the bearing plate; thrust telescopic rods are fixedly installed at both ends of the bottom surface of the column, and a lifting plate is fixedly installed at the lower end of the thrust telescopic rod, and the lifting plate is located between the longitudinal rod and the offset plate.

[0008] Furthermore, the length of one end of the distance rod located below the bottom pile box is greater than the distance between the upper end of the distance rod and the bottom surface of the bearing plate, the distance between the upper end of the distance rod and the bottom surface of the bearing plate is greater than the height of the spiral track plate, the spiral axis of the spiral track plate is coaxial with the axis of the axial hole at the corresponding upper stop column, the compression length of the thrust telescopic rod is greater than the height of the spiral track plate, and the distance between the bottom surface of the isolation box and the bottom surface of the bottom pile box is greater than the distance between the bottom surface of the insert and the bottom surface of the stop column.

[0009] Furthermore, the shock absorbing mechanism includes a shock absorbing rod fixedly arranged on the bottom surface of the shock isolation box, the middle part of the shock absorbing rod is vertically slidably connected to the bottom surface of the bottom pile box, and after the lower part of the shock absorbing rod extends out of the bottom pile box, a main shock absorbing spring and a main abutting part are sequentially arranged from top to bottom, the upper end of the main shock absorbing spring can abut against the bottom surface of the bottom pile box, and the lower end of the main shock absorbing spring can abut against the main abutting part.

[0010] Furthermore, an auxiliary shock absorbing mechanism is provided on the bottom surface of the bottom pile box.

[0011] Furthermore, the auxiliary shock-absorbing mechanism includes a through groove opened on the bottom surface of the bottom pile box at the middle position of the left and right ends, a cavity column is vertically slidably installed in the through groove, and the interior of the cavity column is hollow; a torsion bar is rotatably installed on the upper end surface of the cavity column, and the upper end of the torsion bar passes through the seismic isolation box, the offset plate, and the bearing plate in sequence from bottom to top, and then a clamping screwing part is arranged, and the clamping screwing part is in contact with the bearing plate; the lower end of the torsion bar extends into the cavity column from top to bottom, and then at least two double-headed parts are arranged axially from top to bottom An elliptical disk, each double-headed elliptical disk is abutted against a movable bar on both sides, the movable bar is horizontally slidably installed in the cavity column, a spring whose telescopic direction is parallel to the moving direction of the movable bar is connected between the movable bar and the inner wall of the cavity column, an elastic baffle is elastically rotatably connected to the end of the movable bar away from the double-headed elliptical disk, and an end of the elastic baffle away from the movable bar can extend through a through hole opened on the side wall of the cavity column, a hard plate is arranged above the elastic baffle, and the hard plate is fixedly clamped in the inner cavity of the cavity column.

[0012] Furthermore, the lateral length of the through groove is greater than the maximum lateral length of the cavity column, the distance between two adjacent hard plates in the vertical direction is greater than the length of the elastic baffle, and the distance between the left and right ends of the through groove and the left and right ends of the cavity column is less than the length of the elastic baffle.

[0013] Furthermore, a step surface is provided at the upper end of the seismic isolation box, and the upper end surface of the seismic isolation box abuts against the bottom surface of the bearing plate, and the step surface at the upper end of the seismic isolation box abuts against the bottom surface of the car base.

[0014] It can be seen from the above technical scheme that the present invention has the following advantages: the present invention can not only play a shock-absorbing role through various shock-absorbing structures, but also play a role in fixing the coal truck through the trolley locking mechanism, that is, the rolling range of the wheel is limited by the columns that are not pressed by the wheels of the coal truck, and the inner circle of the wheel is further limited by the columns at the adjacent wheel positions, thereby preventing it from rolling in the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the connection between the car base and the bottom pile box in an embodiment of the present invention; Figure 3Schematic diagram of the connection between the through slot and the cavity column in an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of the connection between the blocking column and the bearing plate in an embodiment of the present invention; Figure 5 is a schematic top view of some structures in an embodiment of the present invention; Figure 6 is a schematic diagram of the structure of the connection between the plug block and the blocking column in an embodiment of the present invention; Figure 7 It is a right side schematic diagram of some structures in an embodiment of the present invention; Figure 8 In the embodiment of the present invention Figure 6 A schematic diagram of the structure enlargement in the middle; Fig. 9 It is a schematic diagram of the structure of the connection between the movable bar and the elastic baffle in an embodiment of the present invention.

[0017] Figure numerals: 1. car body; 2. car base; 3. bottom pile box; 4. seismic isolation box; 5. bearing plate; 6. stop column; 7. plug block; 8. lifting plate; 9. thrust telescopic rod; 10. through rod; 11. axial hole; 12. vertical rod; 13. longitudinal rod; 14. spiral track plate; 15. offset plate; 16. fixed distance rod; 17. shock absorbing rod; 18. top groove; 19. wheel blocking rod; 20. pull rope; 21. steering bending tube; 22. vertical wheel; 23. through groove; 24. cavity column; 25. torsion bar; 26. double-headed elliptical disk; 27. vertical groove; 28. movable bar; 29. ​​hard plate; 30. elastic baffle. DETAILED DESCRIPTION

[0018] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0019] like Figures 1 to 9As shown, the present invention provides a seismic isolation device for safe production in coal mines, which includes a car body 1, a car base 2 is fixedly installed at the lower end of the car body 1, a through hole is penetrated in the middle of the car base 2, and a grid-shaped bearing plate 5 is vertically slidably installed at the through hole. A bottom pile box 3 is fixedly installed below the car base 2, and the bottom pile box 3 is a concave box structure with an open upper end and a closed lower end, and the opening of the bottom pile box 3 is arranged opposite to the bearing plate 5, and a seismic isolation box 4 with an upward opening is vertically slidably installed inside the bottom pile box 3, and the upper end of the seismic isolation box 4 adopts a stepped structure, and the upper end surface of the seismic isolation box 4 abuts against the bottom surface of the bearing plate 5, and the step surface of the upper end of the seismic isolation box 4 abuts against the bottom surface of the car base 2, so as to limit the highest position of the seismic isolation box 4 through the car base 2, and support the bearing plate 5 through the seismic isolation box 4.

[0020] At the same time, the present invention also provides at least two trolley locking mechanisms in the seismic isolation box 4 , and a shock absorbing mechanism is provided on the bottom surface of the seismic isolation box 4 .

[0021] Specifically, the cart locking mechanism includes a dislocation plate 15 vertically slidably mounted in the seismic isolation box 4, at least two spiral track plates 14 are fixedly mounted on the upper surface of the dislocation plate 15, at least two distance rods 16 are also fixedly mounted on the upper surface of the dislocation plate 15, and the upper end of the distance rod 16 passes through the dislocation plate 15 and is sleeved with a spring, and the lower end of the distance rod 16 passes through the dislocation plate 15, the seismic isolation box 4, and the bottom pile box 3 in sequence and is sleeved with a spring, and the two ends of the spring at the upper end of the distance rod 16 are respectively connected to the bottom surface of the load-bearing plate 5 and the dislocation plate The top surface of the distance rod 15 is abutted, and the two ends of the spring at the lower end of the distance rod 16 are respectively abutted against the bottom surface of the bottom pile box 3 and the flange part of the lower end of the distance rod 16, and the lower part of the distance rod 16 is vertically slidably connected with the seismic isolation box 4 and the bottom pile box 3 to ensure that the offset plate 15 can move relative to the seismic isolation box 4 when the bearing plate 5 and the seismic isolation box 4 move downward, and then move synchronously with the seismic isolation box 4 after the upper end of the distance rod 16 contacts the bottom surface of the bearing plate 5, and the vibration between the bottom pile box 3 and the distance rod 16 is damped by the spring arranged at the lower part of the distance rod 16.

[0022] It also includes a plug column that is vertically slidably installed in the cavity of the bearing plate 5, and a shaft hole 11 is vertically penetrated in the middle of the plug column, and a vertical rod 12 is vertically slidably installed in the shaft hole 11. After the lower end of the vertical rod 12 extends out of the shaft hole 11, a spring and a longitudinal rod 13 are sequentially arranged from top to bottom. Among them, the two ends of the spring arranged at the vertical rod 12 respectively abut the longitudinal rod 13 and the plug column, and are larger than the inner diameter of the shaft hole 11; a matching hole is opened in the middle of the longitudinal rod 13, and the matching hole is aligned with the corresponding spiral track plate 14 at the offset plate 15, so that the longitudinal rod 13 can spiral under the cooperation of the two.

[0023] The upper end of the plug column is provided with two wheel-blocking rods 19 arranged in a circular array with the shaft hole 11 as the center. The wheel-blocking rods 19 are horizontally slidably installed on the upper end of the plug column, and a spring whose tensile direction is parallel to the moving direction of the wheel-blocking rod 19 is connected between the wheel-blocking rod 19 and the plug column, and a pull rope 20 is connected between the end of the wheel-blocking rod 19 and the end of the vertical rod 12, and the pull rope 20 has a tendency to be straightened under the action of the spring connected to the wheel-blocking rod 19. Moreover, as a preferred embodiment, the present invention can open a top groove 18 at the upper end of the plug column, and make the top groove 18 communicate with the shaft hole 11; and fix a steering bending tube 21 at a position on the top groove 18 opposite to the shaft hole 11, and rotatably install a vertical wheel 22 at the end position of the wheel-blocking rod 19, and make the pull rope 20 pass through the steering bending tube 21 and bypass the vertical wheel 22, so as to protect the pull rope 20 and reduce its wear during the pulling process.

[0024] The left and right sides or the front and back sides of the plug column are provided with slots, and a plug block 7 is vertically slidably installed in the slot, and a spring is connected between the lower end of the plug block 7 and the lower slot wall of the slot, and the side of the plug block 7 is fixedly connected to the supporting plate 5, and the range of movement of the plug block 7 is limited by the length of the slot.

[0025] Both ends of the bottom surface of the plug column are fixedly installed with a thrust telescopic rod 9, the telescopic direction of the thrust telescopic rod 9 is the vertical direction, and the lower end of the thrust telescopic rod 9 is fixedly installed with a lifting plate 8, the lifting plate 8 is located between the longitudinal rod 13 and the offset plate 15, and the lifting plates 8 on both sides are respectively located on the left and right sides of the longitudinal rod 13, and the lifting plates 8 on both sides can contact with the longitudinal rod 13 when moving, and can also not contact with the longitudinal rod 13. In addition, the present invention also fixes a through rod 10 at the lower end of the lifting plate 8, and the lower end of the through rod 10 passes through the offset plate 15 and the seismic isolation box 4 from top to bottom in sequence, and is fixed to the inner bottom wall of the bottom pile box 3.

[0026] In this way, when the coal truck is pushed into the interior of the car body 1, the wheels of the coal truck will press the bearing plate 5 and part of the plug block 7 under the action of gravity. When the coal truck and the car body 1 are vibrated, the plug column pressed by the wheels of the coal truck will be fixed relatively to the bearing plate 5 under the action of the gravity of the coal truck, and move downward along the bearing plate 5 in the direction close to the bottom pile box 3. At this time, the thrust telescopic rod 9 is compressed, and the longitudinal rod 13 is spiraled relative to the spiral track plate 14, thereby driving the longitudinal rod 13 to rotate (the pitch of the spiral track plate 14 can be designed to ensure that the longitudinal rod 13 can rotate 90 degrees during this process), thereby ensuring that the lifting plate 8 provided below the corresponding plug column will not contact the upper longitudinal rod 13 during the upward movement process, that is, ensuring that the plug column at this position can not interfere with each other during the process of restoring the position. At the same time, the wheel blocking rod 19 will always be hidden in the plug column under the blocking action of the bearing plate 5 and will not extend, thereby ensuring that the longitudinal rod 13 can smoothly cooperate with the spiral track plate 14.

[0027] On the contrary, for the inserted pillars that are not pressed by the wheels of the coal truck, when the supporting plate 5 moves downward, since there is no force-applying object on the upper end of the blocking pillar 6 at that location, the upper end of the blocking pillar 6 at that location will gradually extend out from the grid of the supporting plate 5 to limit the rolling range of the wheel; at the same time, for the blocking pillar 6 extending above the supporting plate 5, during its ascent, the lifting plate 8 provided at its lower end will apply an upward force to the longitudinal rod 13, and push the vertical rod 12 to move upward relative to the blocking pillar 6, so that the pull rope 20 is in a relaxed state, and at this time, the wheel blocking rod 19 will gradually extend out from the blocking pillar 6 under the action of the spring connected between it and the blocking pillar 6, and the wheel blocking rod 19 extending from the blocking pillar 6 on one side of the wheel will pass through the inner circle of the wheel, further limiting the wheel.

[0028] In addition, in order to ensure that the trolley locking mechanism can work smoothly, the present invention further defines the dimensions of key parts. Specifically, the length of one end of the distance rod 16 located below the bottom pile box 3 is greater than the distance between the upper end of the distance rod 16 and the bottom surface of the bearing plate 5, the distance between the upper end of the distance rod 16 and the bottom surface of the bearing plate 5 is greater than the height of the spiral track plate 14, the spiral axis of the spiral track plate 14 is coaxial with the axis of the axial hole 11 at the corresponding upper stop column 6, the compression length of the thrust telescopic rod 9 is greater than the height of the spiral track plate 14, and the distance between the bottom surface of the seismic isolation box 4 and the bottom surface of the bottom pile box 3 is greater than the distance between the bottom surface of the plug 7 and the bottom surface of the stop column 6.

[0029] The shock absorbing mechanism includes a shock absorbing rod 17 fixedly arranged on the bottom surface of the shock isolation box 4, the number of the shock absorbing rods 17 is at least two, and the middle part of each shock absorbing rod 17 is vertically slidably connected to the bottom surface of the bottom pile box 3, and the lower part of each shock absorbing rod 17 is provided with a main shock absorbing spring and a main abutting part from top to bottom after extending out of the bottom pile box 3, and the upper end of the main shock absorbing spring can abut against the bottom surface of the bottom pile box 3, and the lower end of the main shock absorbing spring can abut against the main abutting part, so as to play a role in buffering and shock absorbing the shock isolation box 4 and the bearing plate 5 in the vertical direction.

[0030] In addition, as a preferred embodiment, the present invention further provides an auxiliary shock absorbing mechanism on the bottom surface of the bottom pile box 3, and the auxiliary shock absorbing mechanism includes a through groove 23 provided at the middle position of the left and right ends of the bottom surface of the bottom pile box 3, and a cavity column 24 is vertically slidably installed in the through groove 23, and the interior of the cavity column 24 is hollow, and vertical grooves 27 are provided at both ends of its inner cavity. A torsion bar 25 is rotatably installed on the upper end surface of the cavity column 24, and the upper end of the torsion bar 25 passes through the seismic isolation box 4, the offset plate 15, and the bearing plate 5 from bottom to top in sequence, and then a clamping screwing part is provided, and the clamping screwing part contacts the bearing plate 5, so that the clamping screwing part can be relatively fixed under the friction between it and the bearing plate 5, and can also rotate relative to the bearing plate 5 under the action of external force. After the lower end of the torsion bar 25 extends into the cavity column 24 from top to bottom, at least two double-headed elliptical disks 26 are arranged axially from top to bottom, and each double-headed elliptical disk 26 is abutted against an active bar 28 on the left and right sides. The active bar 28 is horizontally slidably installed in the cavity column 24, and a spring whose telescopic direction is parallel to the moving direction of the active bar 28 is connected between the active bar 28 and the inner wall of the cavity column 24. The end of the active bar 28 away from the double-headed elliptical disk 26 is connected to an elastic baffle 30 through a torsion spring or a spring elastic rotation, and the end of the elastic baffle 30 away from the active bar 28 can be extended through a through hole opened on the side wall of the cavity column 24, and a hard plate 29 is arranged above the elastic baffle 30, and the hard plate 29 is fixedly clamped in the inner cavity of the cavity column 24.

[0031] At the same time, in order to ensure that the auxiliary shock absorbing mechanism can work smoothly, the present invention also defines the size of each component in detail. Specifically, in this embodiment, the transverse length of the through slot 23 is greater than the maximum transverse length of the cavity column 24, the distance between two adjacent hard plates 29 in the vertical direction is greater than the length of the elastic baffle 30, and the distance between the left and right ends of the through slot 23 and the left and right ends of the cavity column 24 is less than the length of the elastic baffle 30.

[0032] In this way, when the bearing plate 5 and the seismic isolation box 4 move downward toward the bottom pile box 3 under vibration, the torsion bar 25 will push the cavity column 24 downward with the movement of the bearing plate 5 and the seismic isolation box 4, at which time the elastic baffle 30 will contact the through groove 23, and in this contact process, the elastic baffle 30 will be gradually elastically bent by the hard plate 29 under the action of pressure, thereby providing auxiliary buffering for the vibration received by the bearing plate 5; on the contrary, when the cavity column 24 moves upward with the bearing plate 5 relative to the bottom pile box 3, the elastic baffle 30 will rotate downward relative to the movable bar 28 and enter the vertical groove 27 of the cavity column 24, thereby facilitating the reset of the cavity column 24. In addition, the present invention can also drive the double-headed elliptical disk 26 to rotate by rotating the torsion bar 25, thereby changing the length of the elastic baffle 30 extending out of the cavity column 24, controlling the pressure required when the elastic baffle 30 contacts the through groove 23 and generates elastic bending dislocation during the downward movement, and changing the elastic resistance according to the weight borne on the bearing plate 5.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A seismic isolation device for safe production in coal mines, comprising a car body, a car base being fixedly mounted at the lower end of the car body; characterized in that: A through hole is penetrated in the middle of the car base, and a grid-shaped bearing plate is vertically slidably installed at the through hole; a bottom pile box is fixedly installed below the car base, and a seismic isolation box with an upward opening is vertically slidably installed inside the bottom pile box, at least two trolley locking mechanisms are arranged in the seismic isolation box, and a shock-absorbing mechanism is arranged on the bottom surface of the seismic isolation box.

2. The seismic isolation device for safe production in coal mines according to claim 1, characterized in that: The trolley locking mechanism includes an offset plate vertically slidably installed in a seismic isolation box, at least two spiral track plates are fixedly installed on the upper surface of the offset plate, at least two distance rods are also fixedly installed on the upper surface of the offset plate, and the upper ends of the distance rods pass through the offset plate and are sleeved with springs, and the lower ends of the distance rods pass through the offset plate, the seismic isolation box, and the bottom pile box in sequence and are sleeved with springs; it also includes an insertion column vertically slidably installed in the cavity of the bearing plate, the middle part of the insertion column is vertically penetrated by an axial hole, a vertical rod is vertically slidably installed in the axial hole, the lower end of the vertical rod protrudes from the axial hole, and a spring and a longitudinal rod are sequentially arranged from top to bottom, and a matching hole is opened in the middle part of the longitudinal rod, and the matching hole corresponds to the offset plate. The spiral track plate is aligned; the upper end of the column is provided with two wheel-blocking rods in a circular array with the shaft hole as the center, the wheel-blocking rod is horizontally slidably installed on the upper end of the column, and a spring whose stretching direction is parallel to the moving direction of the wheel-blocking rod is connected between the wheel-blocking rod and the column, a pull rope is connected between the end of the wheel-blocking rod and the end of the vertical rod, the left and right sides or the front and back sides of the column are provided with slots, an insert block is vertically slidably installed in the slot, and a spring is connected between the lower end of the insert block and the lower slot wall of the slot, and the side of the insert block is fixedly connected to the bearing plate; thrust telescopic rods are fixedly installed at both ends of the bottom surface of the column, and a lifting plate is fixedly installed at the lower end of the thrust telescopic rod, and the lifting plate is located between the longitudinal rod and the offset plate.

3. The seismic isolation device for safe production in coal mines according to claim 2, characterized in that: The length of one end of the distance rod located below the bottom pile box is greater than the distance between the upper end of the distance rod and the bottom surface of the bearing plate, the distance between the upper end of the distance rod and the bottom surface of the bearing plate is greater than the height of the spiral track plate, the spiral axis of the spiral track plate is coaxial with the axis of the axial hole at the corresponding upper stop column, the compression length of the thrust telescopic rod is greater than the height of the spiral track plate, and the distance between the bottom surface of the isolation box and the bottom surface of the bottom pile box is greater than the distance between the bottom surface of the insert and the bottom surface of the stop column.

4. The seismic isolation device for safe production in coal mines according to claim 1, characterized in that: The shock absorbing mechanism includes a shock absorbing rod fixedly arranged on the bottom surface of the shock isolation box, the middle part of the shock absorbing rod is vertically slidably connected to the bottom surface of the bottom pile box, and the lower part of the shock absorbing rod is extended out of the bottom pile box, and a main shock absorbing spring and a main abutting part are arranged in sequence from top to bottom, the upper end of the main shock absorbing spring can abut against the bottom surface of the bottom pile box, and the lower end of the main shock absorbing spring can abut against the main abutting part.

5. The seismic isolation device for safe production in coal mines according to claim 2, characterized in that: The bottom surface of the bottom pile box is provided with an auxiliary shock absorbing mechanism.

6. The seismic isolation device for safe production in coal mines according to claim 5, characterized in that: The auxiliary shock absorbing mechanism includes a through groove opened on the bottom surface of the bottom pile box at the middle position of the left and right ends, a cavity column is vertically slidably installed in the through groove, and the interior of the cavity column is hollow; a torsion bar is rotatably installed on the upper end surface of the cavity column, and the upper end of the torsion bar passes through the seismic isolation box, the offset plate, and the bearing plate in sequence from bottom to top, and then a clamping screwing part is arranged, and the clamping screwing part is in contact with the bearing plate; the lower end of the torsion bar extends into the cavity column from top to bottom, and then at least two double-headed elliptical parts are arranged axially from top to bottom The disk has movable bars on its left and right sides, and the movable bars are horizontally slidably installed in the cavity column. A spring whose telescopic direction is parallel to the moving direction of the movable bar is connected between the movable bar and the inner wall of the cavity column. An elastic baffle is elastically rotatably connected to one end of the movable bar away from the double-headed elliptical disk, and an end of the elastic baffle away from the movable bar can extend through a through hole provided on the side wall of the cavity column. A hard plate is arranged above the elastic baffle, and the hard plate is fixedly clamped in the inner cavity of the cavity column.

7. The seismic isolation device for safe production in coal mines according to claim 6, characterized in that: The lateral length of the through groove is greater than the maximum lateral length of the cavity column, the distance between two adjacent hard plates in the vertical direction is greater than the length of the elastic baffle, and the distance between the left and right ends of the through groove and the left and right ends of the cavity column is less than the length of the elastic baffle.

8. The seismic isolation device for safe production in coal mines according to claim 1, characterized in that: The upper end of the seismic isolation box is provided with a step surface, and the upper end surface of the seismic isolation box abuts against the bottom surface of the bearing plate, and the step surface of the upper end of the seismic isolation box abuts against the bottom surface of the car base.

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