Lifting platform and filling hydraulic support based thereon

Abstract

The utility model relates to a kind of lifting platform and filling hydraulic support based on it in coal mining technology field, comprising: lifting platform component, it includes one or more filling lifting work platform component, filling lifting work platform component, comprising: platform support seat, platform lifting guide beam and lifting platform, and ear seat is equipped on platform support seat;Platform lifting guide beam is vertically inserted in the platform support seat, and lifting platform is fastened connection in the top of platform lifting guide beam;Platform support seat is equipped with multiple platform lifting oil cylinders, the top of platform lifting oil cylinder is connected with lifting platform, and the bottom of platform lifting oil cylinder is connected with platform support seat;Lifting platform is equipped with filling conveyor, and filling conveyor is driven by filling conveyor push oil cylinder to slide horizontally on the upper surface of lifting platform.This scheme solves the problem that filling conveyor of present filling hydraulic support is prone to swing and shake when carrying material.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically to a lifting platform and a filling hydraulic support based thereon. Background Technology

[0002] As one of the green mining technologies in coal mines, paste backfilling technology primarily aims to address the "three-down-up" (lower coal seam, lower coal seam, and lower surface) pressure on coal, improve coal resource recovery rates, and extend the service life of mines. If manual methods are used to isolate and seal leaks in goaf areas of coal mines, it is not only cumbersome and labor-intensive for workers, but also time-consuming and inefficient. Therefore, hydraulic backfilling supports are now commonly used to complete backfilling mining. These are hydraulic power support devices deeply coupled with the backfilling process, mainly used to control the roof strata and maintain the working space at the coal face, and in conjunction with the backfilling system to achieve real-time backfilling of goaf areas, solving problems such as roof collapse and surface subsidence in traditional coal mining.

[0003] Existing filling hydraulic supports (see attached) Figure 1 and attached Figure 2 (As shown) The filling and mining system consists of a front beam, front beam hydraulic cylinder, top beam, hydraulic support, four-bar linkage, tail beam, tail beam support hydraulic cylinder, conveyor moving trolley hydraulic cylinder, conveyor moving trolley, base, push rod, pushing hydraulic cylinder, first-stage pushing hydraulic cylinder, first-stage pushing beam, second-stage pushing hydraulic cylinder, second-stage pushing beam, third-stage pushing hydraulic cylinder, third-stage pushing beam, filling conveyor, conveyor hanging chain, scraper conveyor, coal mining machine, coal seam, roof, floor, etc.

[0004] In operation, the hydraulic props extend to push the top and tail beams upward, simultaneously raising the four-bar linkage mechanism to ensure the top and tail beams rise linearly and press against the roof and floor. The coal mining machine cuts the coal seam to create space, and the retracting hydraulic cylinders push the push rods forward, propelling the scraper conveyor and coal mining machine into space, completing the coal cutting and the forward movement of the scraper conveyor and coal mining machine. The filling conveyor is suspended from the transport machine's moving trolley via a conveyor suspension chain. One end of the hydraulic cylinder of the transport machine's moving trolley is connected to the tail beam, and the other end is connected to the transport machine's moving trolley, causing the transport machine's moving trolley to slide back and forth on the tail beam, thus driving the filling conveyor to slide back and forth on the tail beam. The hydraulic props retract and descend away from the roof, while the retracting hydraulic cylinders extend to push the push rods backward. With the scraper conveyor as a fixed point, the filling hydraulic support moves forward a certain distance into space, and then the hydraulic props extend to push the top and tail beams upward to compact the roof. Throughout the entire coal mining and filling hydraulic support movement process, the filling conveyor is suspended on the moving trolley of the transport machine via the conveyor hanging chain, continuously transporting filling materials and piling them in the space between the roof and floor after the coal seam is excavated, thus realizing the filling of the goaf.

[0005] However, this type of hydraulic support for filling has many problems, such as: 1. The filling conveyor is suspended from the moving trolley of the transport machine via a hanging chain. Because the filling work is continuous, the filling material and the hydraulic support move forward. The filling conveyor and the filling material on it are heavy, making it difficult to move the hydraulic support and the moving trolley of the transport machine, resulting in swaying and shaking, which is extremely dangerous. 2. The filling conveyor and the filling material on it are heavy, making relative movement difficult and frequently causing coal mining to stop, creating a conflict between coal mining and filling work, and resulting in low production efficiency. 3. Using paste filling, a capping layer will form after large-area filling. This capping layer will affect the gas release of the coal seam below the filling layer, posing a risk of gas outbursts and explosions. Utility Model Content

[0006] The present invention aims to provide a lifting platform and a filling hydraulic support based thereon, so as to solve the problem that the filling conveyor of the current filling hydraulic support is prone to swaying and shaking when the filling material is heavy.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a lifting platform, comprising: A lifting platform assembly includes one or more filling lifting work platform assemblies, each comprising: a platform support base, a platform lifting guide beam, and a lifting platform. The platform support base is provided with lugs for connecting movable or supporting equipment. The platform lifting guide beam is vertically inserted into the platform support base, and the lifting platform is fastened to the top end of the platform lifting guide beam. The platform support base is provided with one or more platform lifting cylinders, the top end of which is connected to the lifting platform, and the bottom end of which is connected to the platform support base. The lifting platform is provided with a filling conveyor, which is driven by a filling conveyor push cylinder to slide horizontally on the upper surface of the lifting platform.

[0008] Preferably, as an improvement, the platform support base has ear seats and transverse guide tubes on both opposite sides. The platform support base also has an anti-tipping beam with fixing holes at both ends. A guide shaft is installed inside the guide tube, and the end of the guide shaft away from the guide tube is fixed to the fixing hole of the anti-tipping beam. A fixing pin for fixing the guide shaft is inserted into the guide shaft to fix the anti-tipping beam to the platform support base. An anti-tipping cylinder is connected between the anti-tipping beam and the platform support base. One end of the anti-tipping cylinder is fixed to the anti-tipping beam, and the other end of the anti-tipping cylinder is fixedly connected to the platform support base.

[0009] Preferably, as an improvement, it also includes a compaction mechanism, which includes a compaction cylinder and a compaction plate. One end of the compaction cylinder is fixedly installed on the moving or supporting equipment, and the other end is fixedly installed on the compaction plate. The compaction plate is located between the two filling lifting work platform components.

[0010] A filling hydraulic support for a lifting platform, characterized in that: the filling hydraulic support is connected and used in conjunction with one or more lifting platforms.

[0011] Preferably, as an improvement, the filling hydraulic support includes a base and a supporting top plate beam; The base provides a support foundation for the entire filling hydraulic support; the base is provided with connecting lugs for connection with the lifting platform assembly; the support top plate beam is located above the base, and a hydraulic strut and stabilizing mechanism are installed between the support top plate beam and the base. When the hydraulic strut extends or retracts, the stabilizing mechanism makes the support top plate beam rise and fall stably.

[0012] Preferably, as an improvement, the supporting top beam includes a top beam, a front beam, and a tail beam assembly; the front beam is hinged to the front end of the top beam, and the front beam is driven to move around the hinge by a front beam hydraulic cylinder mounted on the top beam; the tail beam assembly is hinged to the rear end of the top beam, and a tail beam support hydraulic cylinder for driving the tail beam assembly to rotate around the hinge is provided between the tail beam assembly and the base.

[0013] Preferably, as an improvement, the tail beam assembly is hollow, and the end of the tail beam assembly away from the top beam is open. The tail beam assembly is equipped with a tail telescopic beam and a tail telescopic cylinder. One end of the tail telescopic cylinder is hinged to the tail telescopic beam, and the other end of the tail telescopic cylinder is connected to the blind end of the tail beam assembly.

[0014] The principle and advantages of this scheme are as follows: In practical application, the hydraulic support extends to push the top beam and tail beam components upward, simultaneously raising the stabilizing mechanism. The stabilizing mechanism constrains the lifting path of the supporting roof beam, ensuring that the rising top beam is squeezed between the roof and floor of the coal mine. Meanwhile, the coal mining machine cuts the coal seam to create space. At this time, the pushing hydraulic cylinder retracts, using the base as a fulcrum to drive the push rod and connector forward, thereby pushing the scraper conveyor and coal mining machine into the space, completing the cutting of coal and the forward movement of the scraper conveyor and coal mining machine. Subsequently, the hydraulic support is lowered, causing the front beam, front beam hydraulic cylinder, and top beam to leave the coal mine roof. The platform lifting cylinder lowers, causing the lifting platform to lower, disengaging the lifting platform from the filling conveyor, with two adjacent lifting platforms supporting the filling conveyor. Then, the pushing hydraulic cylinder extends, driving the push rod backward. The filling hydraulic support, with the scraper conveyor as a fixed point, moves the filling hydraulic support forward a spatial distance, simultaneously moving the filling lifting platform components together. The hydraulic support extends to push the front beam, the front beam hydraulic cylinder, the top beam, and rise to compact the coal mine roof. The platform lifting cylinder lifts the lifting platform to lift the filling conveyor. During the above process, the compaction cylinder pushes the compaction plate with the base as the fulcrum to press the filling material, thereby compacting the filling material.

[0015] Throughout the operation, the filling conveyor continuously transports filling material, directly unloading it into the internal space of the filling lifting platform assembly. The space between two adjacent filling lifting platform assemblies remains unfilled to release gas.

[0016] 1. Compared with existing technologies, in this solution, during the forward advancement of the hydraulic support, the platform lifting cylinder descends, causing the lifting platform to detach from the filling conveyor. During movement, it is unaffected by the filling conveyor, resulting in good stability and high reliability. This effectively avoids the problem of swaying and shaking caused by the heavy filling material when the filling conveyor of the hydraulic support is transporting materials.

[0017] 2. In this scheme, during the forward movement of the filling hydraulic support, the platform lifting cylinder descends, driving the lifting platform down to detach it from the filling conveyor. During the movement, it is not affected by the filling conveyor, has good stability, and is safe and reliable.

[0018] 3. Existing hydraulic supports for filling can only meet the needs of coal seam mining below 4m, while the lifting platform mechanism used in this solution can meet the filling needs of coal seam heights from 4 to 10m, with a wide range of applications. At the same time, the filling conveyor is installed stably and safely, and operates reliably.

[0019] 4. The platform support in this application restricts the space for the accumulation and collapse of the filling material. The anti-collapse beams on both sides of the filling lifting work platform assembly of the adjacent filling hydraulic support are not filled, forming a gas release zone, which solves the problem of gas release in the protected layer and improves the safety of mining.

[0020] 5. In this application, the tail telescopic cylinder extends and retracts to enable the tail telescopic beam to extend and retract within the tail beam, thereby expanding the safety protection space of the tail beam and providing a larger operating space for the lifting platform.

[0021] 6. The lifting platform in this plan can be matched with other large-capacity filling conveyors through the ear seat to solve the contradiction between coal mining and filling, and improve the overall efficiency.

[0022] 7. The support slab beams are connected by a hinged top beam, front beam, and tail beam. This allows the support slab beams to be disassembled, reducing their volume and facilitating their transportation. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a hydraulic support filled with existing technology.

[0024] Figure 2 A schematic diagram of the hydraulic support installation structure for filling transport vehicles using existing technology.

[0025] Figure 3This utility model presents a schematic diagram of the structure of a hydraulic support for filling.

[0026] Figure 4 This utility model relates to a top view of the filling hydraulic support and filling lifting work platform.

[0027] Figure 5 This utility model presents a rear view structural diagram of a filling and lifting work platform.

[0028] Figure 6 This utility model presents a schematic diagram of the top structure of the filling and lifting work platform.

[0029] Figure 7 This utility model presents a cross-sectional structural diagram of a filling and lifting work platform.

[0030] Figure 8 This utility model presents a front structural diagram of a filling and lifting work platform.

[0031] Figure 9 This utility model presents a cross-sectional structural diagram of the support base for the filling and lifting work platform.

[0032] Figure 10 This is a schematic diagram of the front structure of the support base of the filling and lifting work platform of this utility model.

[0033] Figure 11 This utility model presents a top view of the support base of the filling and lifting work platform.

[0034] Figure 12 This utility model presents a schematic diagram of the side structure of the anti-tipping crossbeam of the filling lifting work platform.

[0035] Figure 13 This utility model presents a schematic diagram of the cross-sectional structure of the anti-tipping crossbeam end face connection of the filling lifting work platform.

[0036] Figure 14 This utility model presents a schematic diagram of its working principle and structural arrangement.

[0037] Figure 15 This utility model presents a schematic diagram of the front layout structure of the filling and lifting work platform.

[0038] Figure 16 The working principle of this utility model is shown in the top view of the structural arrangement.

[0039] Figure 17 This utility model presents a schematic diagram of the structural layout of a single filling and lifting work platform.

[0040] Figure 18 This utility model presents a schematic diagram of the installation and compaction plate structure layout.

[0041] The reference numerals in the accompanying drawings include: 1. Front beam; 2. Front beam hydraulic cylinder; 3. Top beam; 4. Hydraulic support; 5. Four-bar linkage; 6. Tail beam assembly; 7. Tail beam support hydraulic cylinder; 8. Connector; 9. Base; 10. Push rod; 11. Pushing hydraulic cylinder; 12. Filling lifting work platform assembly; 13. Pin six; 14. Pin one; 15. Ear seat one; 16. Ear seat two; 17. Pin two; 18. Tail telescopic cylinder; 19. Tail telescopic beam; 20. Conveyor hanging chain; 21. Ear seat three; 22. Pin three; 23. Ear seat four; 24. Pin five; 25. 5. Ear seat five 26. Ear seat six 27. Platform support seat 28. Platform lifting guide beam 29. Platform lifting cylinder 30. Ear seat seven 31. Pin shaft seven 32. Anti-tipping beam 33. Guide shaft 34. Fixing pin 35. Anti-tipping cylinder 36. Anti-tipping cylinder fixing pin 37. Pin shaft eight 38. Ear seat eight 39. Filling conveyor pushing cylinder 40. Ear seat nine 41. Pin shaft nine 42. Ear seat ten 43. Pin shaft ten 44. Guide tube 45. Lifting platform 65. Fixing hole 75. Compacting plate 79. Compacting cylinder 80. Compacting mechanism 90. Detailed Implementation

[0042] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 3 ~Appendix Figure 18 As shown: A lifting platform, comprising: A lifting platform assembly includes one or more filling lifting work platform assemblies 12. Taking two filling lifting work platform assemblies 12 as an example, the two filling lifting work platform assemblies 12 are symmetrically arranged. Each assembly includes: a platform support base 28, two platform lifting guide beams 29, and a lifting platform 65. The platform support base 28 is hinged together with two lugs 27 fixedly connected to the side wall and two lugs 26 and two pins 25 fixed to one end of the base 9. The two platform lifting guide beams 29 are vertically inserted into the platform support base 28, and the lifting platform 65 is fastened to the top of the two platform lifting guide beams 29. The platform support 28 is equipped with multiple platform lifting cylinders 30. The top of the platform lifting cylinder 30 is connected to the lifting platform 65 through the cooperation of ear seat 8 39 and pin 8 38, and the bottom of the platform lifting cylinder 30 is connected to the platform support 28 through the cooperation of ear seat 7 31 and pin 7 32. The lifting platform 65 is equipped with a filling conveyor. The filling conveyor pushing cylinder 40 is hinged to the lifting platform 65 through the cooperation of ear seat 9 41 and pin 9 42. The filling conveyor is connected to the filling conveyor pushing cylinder 40 through ear seat 10 43 and pin 10 44. The filling conveyor is driven by the filling conveyor pushing cylinder 40 to slide horizontally on the upper surface of the lifting platform 65.

[0043] The platform support 28 has ear seats 16 on the side near the base 9 and on the side opposite to the base 9, and two horizontal guide tubes 45. The platform support 28 is also equipped with an anti-tipping beam 33. Each end of the anti-tipping beam 33 has two fixing holes 75. A guide shaft 34 is installed in the guide tube 45 and is fixed in the guide tube 45 by a fixing pin 35. The end of the guide shaft 34 away from the guide tube 45 is fixed to the fixing hole 75 of the anti-tipping beam 33, thus fixing the anti-tipping beam 33 to the platform support 28. An anti-tipping cylinder 36 is connected between the two opposing ear seats 16. The anti-tipping cylinder 36 is fixed to the anti-tipping beam 33 by an anti-tipping cylinder fixing pin 37. The anti-tipping cylinder 36 is used to push the anti-tipping beam 33 to prevent the platform support 28 from tilting after filling with material.

[0044] A filling hydraulic support for a lifting platform 65, which can be connected to one or more lifting platforms 65 and then used in conjunction with them.

[0045] The filling hydraulic support includes a base 9 and a supporting roof beam. The base 9 provides the foundation for the entire filling hydraulic support; multiple lugs 26 are fixedly connected to the right side of the base 9, and these lugs 26 are used to connect to the lifting platform 65. The base 9 has a receiving space in which a horizontally arranged push rod 10 is installed. A pushing hydraulic cylinder 11 is hinged to the base 9, and the output end of the pushing hydraulic cylinder 11 is hinged to the push rod 10. A connector 8 is installed at the end of the push rod 10, which is used to connect the scraper conveyor and the coal mining machine. When the pushing hydraulic cylinder 11 operates, it pushes the push rod 10, causing the connection to slide horizontally.

[0046] The base 9 is also provided with a compaction mechanism 90, which includes a compaction cylinder 80 and a compaction plate 79. One end of the compaction cylinder 80 is fixedly installed on the base 9, and the other end is fixedly installed on the compaction plate 79. The compaction plate 79 is located between two platform support seats 28. The compaction plate 79 is used to push and compact the filling material by the thrust when the base 9 moves.

[0047] The supporting top beam includes a top beam 3, a front beam 1, and a tail beam assembly 6. A stabilizing mechanism made of a four-bar linkage 5 and a hydraulic support 4 are provided between the top beam 3 and the base 9. When the hydraulic support 4 extends or retracts, the top beam 3 is raised or lowered along the double torsion trajectory of the four-bar linkage 5 through the four-bar linkage 5. The four-bar linkage 5 includes one main rod and two auxiliary rods. The top of the main rod is hinged to the lower surface of the top beam 3, the tops of the two auxiliary rods are hinged to the lower part of the main rod, and the bottoms of the two auxiliary rods are hinged to the base 9. The base 9, the main rod, and the two auxiliary rods together constitute the four-bar linkage 5. The front beam 1 is hinged to the front end of the top beam 3. The front beam 1 is driven by the front beam hydraulic cylinder 2 set on the top beam 3 to move around the hinge. The tail beam assembly 6 is hinged to the rear end of the top beam 3 through pin six 13. A tail beam support hydraulic cylinder 7 is provided between the tail beam assembly 6 and the base 9 for driving the tail beam assembly 6 to rotate around the hinge. The top end of the tail beam support hydraulic cylinder 7 is hinged to the lower surface of the tail beam assembly 6 through ear seat one 15 and pin one 14. The bottom end of the tail beam support hydraulic cylinder 7 is hinged to the base 9 through ear seat two 16 and pin two 17.

[0048] The tail beam assembly 6 is hollow, and the end of the tail beam assembly 6 away from the top beam 3 is open. The tail telescopic beam 19 and the tail telescopic cylinder 18 are installed inside the tail beam assembly 6. One end of the tail telescopic cylinder 18 is hinged to the tail telescopic beam 19 through the cooperation of the ear seat 3 21 and the pin 3 22. The other end of the tail telescopic cylinder 18 is hinged to the blind end of the tail beam assembly 6 through the cooperation of the ear seat 4 23 and the pin 4 24. A conveyor hanging chain 20 is fixedly connected to the tail telescopic beam 19.

[0049] The specific implementation process is as follows: In practical applications, the hydraulic support 4 extends to push the top beam 3 and tail beam assembly 6 upwards, simultaneously lifting the four-bar linkage 5. The constrained lifting and lowering of the four-bar linkage 5 follows an approximately linear double-torsional trajectory, ensuring that the top beam 3 rises and presses between the roof and floor of the coal mine. Meanwhile, the coal mining machine cuts the coal seam to create space. At this time, the pushing hydraulic cylinder 11 retracts, using the base 9 as a fulcrum to drive the push rod 10 and connector 8 forward, thereby pushing the scraper conveyor and the coal mining machine into the space, completing the cutting of coal and the forward movement of the scraper conveyor and the coal mining machine. Subsequently, the hydraulic support 4 lowers, causing the front beam 1, front beam hydraulic cylinder 2, and top beam 3 to leave the coal mine roof. The platform lifting cylinder 30 lowers, causing the lifting platform 65 to lower as well. The lifting platform 65 disengages from the filling conveyor, and the two adjacent lifting platforms 65 are in a state of supporting the filling conveyor. Then, the hydraulic cylinder 11 extends and drives the push rod 10 backward. The filling hydraulic support scraper conveyor is fixed at the point of contact and moves the filling hydraulic support forward a certain distance, while simultaneously moving the filling lifting platform assembly 12 together. The hydraulic support 4 extends and pushes the front beam 1, the front beam hydraulic cylinder 2, and the top beam 3 to rise and compact the coal mine roof. The platform lifting cylinder 30 lifts the lifting platform 65 to lift the filling conveyor. During the above process, the compaction cylinder 80 pushes the compaction plate 79 with the base 9 as the fulcrum to press the filling material, thereby compacting the filling material.

[0050] Throughout the operation, the filling conveyor continuously transports filling material, directly unloading it into the internal space of the filling lifting platform assembly 12. The space between two adjacent filling lifting platform assemblies 12 remains unfilled and is used to release gas.

[0051] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lifting platform, characterized in that, include: A lifting platform assembly includes one or more filling lifting work platform assemblies, each comprising: a platform support base, a platform lifting guide beam, and a lifting platform. The platform support base is provided with lugs for connecting movable or supporting equipment. The platform lifting guide beam is vertically inserted into the platform support base, and the lifting platform is fastened to the top end of the platform lifting guide beam. The platform support base is provided with one or more platform lifting cylinders, the top end of which is connected to the lifting platform, and the bottom end of which is connected to the platform support base. The lifting platform is provided with a filling conveyor, which is driven by a filling conveyor push cylinder to slide horizontally on the upper surface of the lifting platform.

2. The lifting platform according to claim 1, characterized in that: The platform support base has ear seats and transverse guide tubes on both opposite sides. The platform support base is also equipped with an anti-tipping beam, with fixing holes at both ends. A guide shaft is installed inside the guide tube, and the end of the guide shaft away from the guide tube is fixed to the fixing hole of the anti-tipping beam. A fixing pin for fixing the guide shaft is inserted into the guide shaft to fix the anti-tipping beam to the platform support base. An anti-tipping cylinder is connected between the anti-tipping beam and the platform support base. One end of the anti-tipping cylinder is fixed to the anti-tipping beam, and the other end of the anti-tipping cylinder is fixedly connected to the platform support base.

3. A lifting platform according to claim 1, characterized in that: It also includes a compaction mechanism, which includes a compaction cylinder and a compaction plate. One end of the compaction cylinder is fixedly installed on the moving or supporting equipment, and the other end is fixedly installed on the compaction plate. The compaction plate is located between the two filling lifting work platform components.

4. A filling hydraulic support for a lifting platform, characterized in that: The filling hydraulic support of the lifting platform is connected and used in conjunction with one or more lifting platforms as described in any one of claims 1-3.

5. The filling hydraulic support for a lifting platform according to claim 4, characterized in that: The filling hydraulic support includes a base and a supporting top plate beam; The base provides a support foundation for the entire filling hydraulic support; the base is provided with connecting lugs for connection with the lifting platform assembly; the support top plate beam is located above the base, and a hydraulic strut and stabilizing mechanism are installed between the support top plate beam and the base. When the hydraulic strut extends or retracts, the stabilizing mechanism makes the support top plate beam rise and fall stably.

6. The filling hydraulic support for a lifting platform according to claim 5, characterized in that: The supporting top plate beam includes a top beam, a front beam, and a tail beam assembly; the front beam is hinged to the front end of the top beam, and the front beam is driven to move around the hinge by a front beam hydraulic cylinder mounted on the top beam; the tail beam assembly is hinged to the rear end of the top beam, and a tail beam support hydraulic cylinder is provided between the tail beam assembly and the base for driving the tail beam assembly to rotate around the hinge.

7. The filling hydraulic support for a lifting platform according to claim 6, characterized in that: The tail beam assembly is hollow, and the end of the tail beam assembly away from the top beam is open. The tail telescopic beam and the tail telescopic cylinder are installed inside the tail beam assembly. One end of the tail telescopic cylinder is hinged to the tail telescopic beam, and the other end of the tail telescopic cylinder is connected to the blind end of the tail beam assembly.

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