Hydraulic support

Abstract

The invention provides a hydraulic support. The hydraulic support comprises a base; the at least four supporting columns are arranged on the base, one part of the at least four supporting columns is located at one end of the base, and the other part of the at least four supporting columns is located at the other end of the base; the top beam is connected with the other ends of the at least four supporting columns; the shield beam comprises a shield beam body, a first side protection plate and a first hydraulic driving device, the shield beam body is connected with the base and the top beam, and a supporting space is defined by the base, the top beam and the shield beam body; the first side protection plate is arranged on one side of the shield beam body, the shield beam body is provided with a groove, a groove opening of the groove faces the supporting space, the first hydraulic driving device is arranged on the shield beam body and located in the groove, and the first hydraulic driving device is connected with the first side protection plate and used for driving the first side protection plate to move relative to the shield beam body. The groove is formed in the shield beam body, the first hydraulic driving device is installed in the groove, and the support space is not occupied.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fully mechanized coal support, in particular to a hydraulic support. BACKGROUND

[0002] In the related art, two-column shield hydraulic supports are often used for mining of extremely thin coal seams. The two-column shield hydraulic supports achieve compact structure through highly integrated design, but also result in extremely narrow internal space of the support, especially the side pushing mechanism and its driving device usually occupy more space, so that the operation and maintenance channels are limited, and personnel have difficulty in moving when the roof is pressed or daily maintenance, which exists safety hazards. Therefore, how to optimize the internal space layout to improve the operability and maintenance convenience under the premise of maintaining the compact overall structure of the hydraulic support is a problem to be solved in the field. SUMMARY

[0003] The present application is intended to at least solve one of the problems in the prior art or related art.

[0004] To this end, the present application provides a hydraulic support.

[0005] Therefore, the present application provides a hydraulic support, which comprises a base, at least four support columns arranged on the base, one part of the at least four support columns being located at one end of the base, and another part of the at least four support columns being located at the other end of the base, a top beam connected to the other end of the at least four support columns, a shield beam comprising a shield beam body, a first side guard plate and a first hydraulic driving device, the shield beam body being connected to the base and the top beam respectively, the base, the top beam and the shield beam body forming a support space, the first side guard plate being arranged on one side of the shield beam body, the shield beam body having a groove, the groove being open towards the support space, the first hydraulic driving device being arranged in the shield beam body and located in the groove, the first hydraulic driving device being connected to the first side guard plate and used to drive the first side guard plate to move relative to the shield beam body.

[0006] The hydraulic support provided by the application comprises a base, at least four support columns, a top beam and a shield beam. The base is located at the bottom of the hydraulic support and is the load-bearing foundation of the entire hydraulic support. The at least four support columns are arranged on the base and are divided into two groups. Specifically, part of the at least four support columns are located at one end of the base, and the other part of the at least four support columns are located at the other end of the base. Specifically, part of the at least four support columns are located at the left end of the base, and the other part of the at least four support columns are located at the right end of the base. The support columns at the left end and the support columns at the right end are symmetrically arranged. The top beam is a plate-shaped load-bearing structure. The top beam is integrally connected to the other end of the at least four support columns. The top beam directly contacts the coal seam roof and uniformly transmits the support force of the support columns to the roof, thereby supporting the roof and preventing the roof from collapsing. The shield beam comprises a shield beam body, a first side guard plate and a first hydraulic drive device. The shield beam body is connected to the base and the top beam. The shield beam body, the base and the top beam jointly enclose a closed support space. The support space is used for accommodating workers and mining equipment and plays a role of isolating the roof waste and protecting the safety of the workers and the equipment. The first side guard plate is a plate-shaped protective structure. The first side guard plate is arranged on one side of the shield beam body and can move relative to the shield beam body. The first side guard plate is used for filling the gap between the hydraulic support and the adjacent support to prevent the waste from falling from the gap. A groove is formed in the shield beam body, and the groove opening faces the support space. The first hydraulic drive device is a power output component and is installed in the groove of the shield beam body. The first hydraulic drive device is arranged on the shield beam body and installed in the groove of the shield beam body. The first hydraulic drive device is connected to the first side guard plate. The core role is to realize the telescopic movement through the hydraulic drive and drive the first side guard plate to move transversely relative to the shield beam body.

[0007] In the related art, the hydraulic support used in the mining of the extremely thin coal seam directly arranges part of the drive device on the surface of the side of the shield beam facing the support space, which occupies the narrow support space and further compresses the operation space of the workers and the equipment arrangement space, thereby causing inconvenience in operation. Another part of the drive device is buried in the shield beam. When the drive device is installed or disassembled, the shield beam needs to be disassembled. When the components are replaced, the parameters are adjusted or the pipeline is maintained, the operation is complicated and the efficiency is low. The traditional layout of the two-column support concentrates the load transmission, the support force of the top beam is unevenly distributed on the roof, and the roof is easily crushed when the roof is pressed, thereby affecting the continuity of the operation.

[0008] The present application is directed to the above situation, a groove is arranged on the shield beam body, the groove opening is directed to the support space, the first hydraulic drive device is installed in the groove, compared with the existing installation mode, the effective area of the support space is not occupied, sufficient space is provided for the staff operation and equipment arrangement under the premise of ensuring the support strength. The opening design of the groove suitable for the extremely thin coal seam low working condition exposes the first hydraulic drive device to the side of the support space, the staff does not need to disassemble the shield beam body, can directly contact the first hydraulic drive device through the opening, easily completes the installation and fixation, component replacement, parameter adjustment and pipeline connection maintenance and other operations, solves the inconvenient operation problem caused by the buried drive device in the related technology.

[0009] The hydraulic support provided by the present application adopts a distributed layout of at least four support columns, and the present application designs a four-column support shield type hydraulic support suitable for extremely thin coal seams, so that the roof beam support force is more evenly distributed, the concentrated load when the roof is pressed is dispersed, the impact resistance and stability of the support are greatly improved, and the problem that the traditional support is easily pressed to death is solved. The base, the roof beam and the shield beam body enclose a closed support space, cooperate with the gap filling function of the first side guard plate, construct a full-range protection system, and effectively isolate the roof gangue.

[0010] In some technical solutions, the shield beam body comprises: a bottom plate connected with the roof beam, the bottom plate comprising a mounting surface facing the support space, and the first hydraulic drive device being arranged on the mounting surface of the bottom plate; a first main rib arranged on the mounting surface of the bottom plate; a second main rib arranged on the mounting surface of the bottom plate, the second main rib being arranged in a spaced manner with the first main rib along the width direction of the bottom plate; a first rib plate arranged on the mounting surface of the bottom plate and located between the first main rib and the second main rib, one end of the first rib plate being connected with the first main rib and the other end of the first rib plate being connected with the second main rib; a rear plate assembly arranged on the mounting surface of the bottom plate, the rear plate assembly being arranged in a spaced manner with the first rib plate along the length direction of the bottom plate, and the rear plate assembly being connected with the first main rib and the second main rib respectively; and the bottom plate, the first main rib, the second main rib, the first rib plate and the rear plate assembly enclosing a groove.

[0011] In some technical solutions, the rear plate assembly comprises: a second rib plate arranged opposite to the first rib plate; a third rib plate connected with one end of the second rib plate, the third rib plate extending along the length direction of the bottom plate, and the third rib plate having a gap with the first main rib; a fourth rib plate connected with one end of the third rib plate away from the second rib plate, the fourth rib plate extending along the width direction of the bottom plate, and the fourth rib plate being connected with the first main rib; a fifth rib plate connected with the other end of the second rib plate, the fifth rib plate extending along the length direction of the bottom plate, and the fifth rib plate having a gap with the second main rib; a sixth rib plate connected with one end of the fifth rib plate away from the second rib plate, the sixth rib plate extending along the width direction of the bottom plate, and the sixth rib plate being connected with the first main rib; along the length direction of the bottom plate, the second rib plate is closer to the first rib plate relative to the fourth rib plate and the fifth rib plate.

[0012] In some embodiments, the shield beam body further comprises: a third main rib, a fourth main rib, a fifth main rib and a sixth main rib, which are arranged on the bottom plate and extend along the length direction of the bottom plate; the third main rib, the fourth main rib, the first main rib, the second main rib, the fifth main rib and the sixth main rib are sequentially arranged along the width direction of the bottom plate and have gaps between each other; a seventh rib plate is arranged on the bottom plate and extends along the width direction of the bottom plate, and the seventh rib plate is connected with one side of the fourth main rib, one end of the first main rib, one end of the second main rib and one side of the fifth main rib respectively; an eighth rib plate is connected with one end of the rear plate assembly away from the mounting surface of the bottom plate; a ninth rib plate is arranged between the fourth main rib and the first main rib, one end of the ninth rib plate is connected with the fourth main rib, the other end of the ninth rib plate is connected with the first main rib, and the ninth rib plate extends along the length direction of the bottom plate; and a tenth rib plate is arranged between the fifth main rib and the second main rib, one end of the tenth rib plate is connected with the fifth main rib, the other end of the tenth rib plate is connected with the second main rib, and the tenth rib plate extends along the length direction of the bottom plate.

[0013] In some embodiments, the shield beam further comprises a first connecting rod, which comprises: two connecting rod segments, which extend along the length direction of the first connecting rod and are arranged apart from each other; and a plurality of connecting segments, which are connected between the two connecting rod segments and form a box structure with the two connecting rod segments; part of one of the two connecting rod segments is arranged between the third main rib and the fourth main rib, and part of the other of the two connecting rod segments is arranged between the fourth main rib and the first main rib; the shield beam further comprises: a first mounting pin shaft, which is arranged through the third main rib, the one connecting rod segment, the fourth main rib, the other connecting rod segment and the first main rib, so that the first connecting rod is hinged to the shield beam body; a second connecting rod, which is an integral connecting rod; part of the second connecting rod is arranged between the third main rib and the fourth main rib, and the second connecting rod is farther away from the first hydraulic drive device than the first connecting rod along the length direction of the bottom plate; and a second mounting pin shaft, which is arranged through the third main rib, the fourth main rib and the second connecting rod, so that the second connecting rod is hinged to the shield beam body.

[0014] In some embodiments, the shield beam body further comprises: an eleventh rib plate arranged on the bottom plate between the third main rib and the fourth main rib and connected with the third main rib and the fourth main rib respectively; a twelfth rib plate arranged on the bottom plate between the third main rib and the fourth main rib and connected with the third main rib and the fourth main rib respectively, and the eleventh rib plate and the twelfth rib plate have a gap between each other along the length direction of the bottom plate; and a thirteenth rib plate arranged between the third main rib and the fourth main rib, connected with the third main rib and the fourth main rib respectively, and connected with one end of the eleventh rib plate and one end of the twelfth rib plate away from the bottom plate.

[0015] In some embodiments, the shield beam further comprises a side pushing rod, the side pushing rod extends along the width direction of the bottom plate, one end of the side pushing rod is hinged to the first hydraulic driving device through a first connecting pin shaft, and the other end of the side pushing rod is hinged to the first side shield plate through a second connecting pin shaft.

[0016] In some embodiments, the shield beam further comprises a first pre-tightening assembly, the first pre-tightening assembly comprises a spring limiting plate arranged on the side of the fourth main rib away from the third main rib, a sleeve arranged between the spring limiting plate and the first main rib, a spring guide rod arranged in the sleeve and penetrating through the fourth main rib and the third main rib, one end of the spring guide rod being connected to the first side shield plate, and a pre-tightening spring sleeved outside the spring guide rod, one end of the pre-tightening spring abutting against the spring limiting plate, and the other end of the pre-tightening spring abutting against the first side shield plate.

[0017] In some embodiments, the base comprises a base body comprising a body and a first base main rib, a second base main rib, a third base main rib and a fourth base main rib arranged on the body in sequence along the width direction of the body and spaced apart from each other, a first plate body arranged on the body between the first base main rib and the second base main rib, and a second plate body arranged on the body between the first plate body and the second base main rib.

[0018] In some embodiments, the base further comprises a sliding shoe, the sliding shoe being a cast part, the sliding shoe being provided with a traction hole, a front bridge arranged at the first end of the base body, and a bottom edge arranged at the first end of the base body, the bottom edge being spaced apart from the front bridge along the height direction of the base body, the front bridge and the bottom edge forming a mounting groove therebetween, and the sliding shoe being embedded in the mounting groove.

[0019] In some embodiments, the support column is provided with a stop block having a circular arc surface, the base body is provided with a column socket, and the base further comprises a stop pin seat arranged on the fourth base main rib, a first pad arranged on the side of the fourth base main rib facing the third base main rib, the first pad being provided with a first through hole, and a second locking pin shaft penetrating through the stop pin seat and the first through hole in sequence and abutting against the circular arc surface of the stop block to press the support column tightly in the column socket.

[0020] In some embodiments, the base further comprises a limiting piece connected with the second locking pin shaft and the stop pin seat respectively.

[0021] In some embodiments, the top beam comprises a top beam body comprising a first beam segment, a second beam segment and a third beam segment, one end of the second beam segment being connected to the first beam segment, and the other end of the second beam segment being connected to the third beam segment, the distance between the surface of the second beam segment facing the support space and the base being greater than the distance between the surface of the first beam segment facing the support space and the base, and the distance between the surface of the third beam segment facing the support space and the base.

[0022] In some embodiments, the top beam further comprises: a first welding plate arranged on one side of the top beam body facing the support space; an ear seat arranged on the first welding plate; a second hydraulic drive device, one end of the second hydraulic drive device is hinged to the ear plate; a second side guard plate arranged on at least one side of the top beam body, and the other end of the second hydraulic drive device is connected to the second side guard plate.

[0023] In some embodiments, the hydraulic support further comprises: a front beam comprising a first front beam body and a second front beam body arranged along the width direction of the hydraulic support, and the first front beam body and the second front beam body are respectively hinged to the front end of the top beam.

[0024] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings. Figure 1 One of the structural schematic diagrams of the hydraulic support in some embodiments of the present application is shown; Figure 2 One of the structural schematic diagrams of the shield beam body in some embodiments of the present application is shown; Figure 3 Two of the structural schematic diagrams of the shield beam body in some embodiments of the present application are shown; Figure 4 One of the structural schematic diagrams of the shield beam in some embodiments of the present application is shown; Figure 5 Two of the structural schematic diagrams of the shield beam in some embodiments of the present application are shown; Figure 6 One of the structural schematic diagrams of the first connecting rod in some embodiments of the present application is shown; Figure 7 Two of the structural schematic diagrams of the first connecting rod in some embodiments of the present application are shown; Figure 8 The structural schematic diagram of the second connecting rod in some embodiments of the present application is shown; Figure 9 One of the structural schematic diagrams of the base in some embodiments of the present application is shown; Figure 10 Two of the structural schematic diagrams of the base in some embodiments of the present application are shown; Figure 11 One of the structural schematic diagrams of the sliding shoe in some embodiments of the present application is shown; Figure 12 Two of the structural schematic diagrams of the sliding shoe in some embodiments of the present application are shown; Figure 13 Fig. 3 shows a structural schematic diagram of the base in some embodiments of the present application; Figure 14 Fig. 4 shows a structural schematic diagram of the base in some embodiments of the present application; Figure 15 Fig. 5 shows a structural schematic diagram of the base in some embodiments of the present application; Figure 16 Fig. 6 shows a structural schematic diagram of the support column in some embodiments of the present application; Figure 17 Fig. 7 shows a structural schematic diagram of the hydraulic support in some embodiments of the present application; Figure 18 Fig. 8 shows a structural schematic diagram of the hydraulic support in some embodiments of the present application; Figure 19 Fig. 9 shows a structural schematic diagram of the roof beam in some embodiments of the present application; Figure 20 Fig. 10 shows a structural schematic diagram of the roof beam in some embodiments of the present application;

[0026] wherein, Figures 1 to 20 The correspondence between the names of the middle components and the labels is as follows: 10 hydraulic support, 100 base, 102 base body, 104 first base main bar, 106 second base main bar, 110 third base main bar, 112 fourth base main bar, 114 first plate body, 116 second plate body, 118 first vertical plate body, 120 second vertical plate body, 122 first horizontal plate body, 124 third vertical plate body, 126 fourth vertical plate body, 128 second horizontal plate body, 130 fifth vertical plate body, 132 sixth vertical plate body, 134 third horizontal plate body, 136 sliding shoe, 138 rear end face, 140 lower end step, 142 first lightening groove, 144 second lightening groove, 146 cover plate, 148 front bridge, 150 bottom edge, 152 mounting groove, 154 stop pin seat, 156 first sticking plate, 158 second sticking plate, 160 column socket, 162 second locking pin shaft, 164 limiting piece, 166 third mounting pin shaft, 168 fourth mounting pin shaft, 170 traction hole, 172 body, 200 support column, 202 stop block, 300 top beam, 302 top beam body, 304 first beam segment, 306 second beam segment, 308 third beam segment, 316 first bent plate, 318 top plate, 320 second bent plate, 322 first welded plate, 324 ear seat, 326 second welded plate, 328 third welded plate, 330 second hydraulic drive device, 332 second side guard plate, 400 shield beam, 402 shield beam body, 404 bottom plate, 406 mounting face, 408 first main bar, 410 second main bar, 412 third main bar, 414 fourth main bar, 416 fifth main bar, 418 sixth main bar, 420 first bar plate, 422 rear plate assembly, 424 second bar plate, 426 third bar plate, 428 fourth bar plate, 430 fifth bar plate, 432 sixth bar plate, 434 seventh bar plate, 436 eighth bar plate, 438 ninth bar plate, 440 tenth bar plate, 442 eleventh bar plate, 444 twelfth bar plate, 446 thirteenth bar plate, 448 seventeenth bar plate, 450 eighteenth bar plate, 452 nineteenth bar plate, 454 twentieth bar plate, 460 support space, 462 groove, 464 first connecting rod, 466 connecting rod segment, 468 connecting segment, 470 first hydraulic drive device, 472 first side guard plate, 474 first mounting pin shaft, 476 second connecting rod, 478 second mounting pin shaft, 480 side pushing lead rod, 482 first connecting pin shaft, 484 second connecting pin shaft, 486 first pre-tightening assembly, 488 spring limiting plate, 490 sleeve, 491 spring guide rod, 492 pre-tightening spring, 493 first locking pin shaft, 494 first sub connecting segment, 495 second sub connecting segment, 496 third sub connecting segment, 497 fourth sub connecting segment, 498 third connecting pin shaft, 500 front beam, 502 first front beam body, 504 second front beam body. DETAILED DESCRIPTION

[0027] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other manners different from those described herein, and therefore, the protective scope of the present application is not limited by the specific embodiments disclosed below.

[0029] The specific embodiments of the present application will be described below in conjunction with the accompanying drawings and specific embodiments. Figures 1 to 20 A hydraulic support 10 is described in the present application.

[0030] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , in some embodiments of the present application, a hydraulic support 10 is proposed, the hydraulic support 10 comprising a base 100; at least four support columns 200 arranged on the base 100, a part of the at least four support columns 200 being located at one end of the base 100, and another part of the at least four support columns 200 being located at the other end of the base 100; a top beam 300 connected to the other end of the at least four support columns 200; a canopy beam 400, the canopy beam 400 comprising a canopy beam body 402, a first side guard plate 472 and a first hydraulic driving device 470, the canopy beam body 402 being connected to the base 100 and the top beam 300 respectively, and the base 100, the top beam 300 and the canopy beam body 402 enclosing a support space 460; the first side guard plate 472 being arranged on one side of the canopy beam body 402, the canopy beam body 402 having a groove 462, the groove 462 having an opening facing the support space 460, the first hydraulic driving device 470 being arranged on the canopy beam body 402 and located in the groove 462, the first hydraulic driving device 470 being connected to the first side guard plate 472 and used to drive the first side guard plate 472 to move relative to the canopy beam body 402.

[0031] In this embodiment, the present application proposes a hydraulic support 10, the hydraulic support 10 comprising a base 100, at least four support columns 200, a top beam 300 and a canopy beam 400. The base 100 is located at the bottom of the hydraulic support 10 and is the load-bearing foundation of the entire hydraulic support 10.

[0032] At least four support columns 200 are arranged on the base 100, and the at least four support columns 200 are divided into two groups, wherein a part of the at least four support columns 200 are arranged at one end of the base 100, and another part of the at least four support columns 200 are arranged at the other end of the base 100, and specifically, a part of the at least four support columns 200 are arranged at the left end of the base 100, and another part of the at least four support columns 200 are arranged at the right end of the base 100, and the support columns 200 at the left end and the support columns 200 at the right end are symmetrically arranged.

[0033] The top beam 300 is a plate-shaped bearing structure, and the top beam 300 is integrally connected with the other end of the at least four support columns 200, and the top beam 300 is directly in contact with the coal seam roof, so as to transmit the support force of the support columns 200 to the roof, thereby supporting the roof and preventing the roof from collapsing.

[0034] The shield beam 400 includes a shield beam body 402, a first side guard plate 472 and a first hydraulic drive device 470. The shield beam body 402 is connected with the base 100 and the top beam 300 respectively, and the shield beam body 402, the base 100 and the top beam 300 jointly enclose a closed support space 460, and the support space 460 is used for accommodating workers and mining equipment, thereby playing a role of isolating the roof gangue and protecting the safety of the operating personnel and equipment.

[0035] The first side guard plate 472 is a plate-shaped protective structure, and the first side guard plate 472 is arranged on one side of the shield beam body 402, and the first side guard plate 472 can move relative to the shield beam body 402, and the first side guard plate 472 is used for filling the gap between the hydraulic support 10 and the adjacent support, thereby preventing the gangue from falling from the gap. A groove 462 is formed in the shield beam body 402, and the groove 462 is arranged on the shield beam body 402. The first hydraulic drive device 470 is a power output component, and is installed in the groove 462 of the shield beam body 402. The first hydraulic drive device 470 is arranged on the shield beam body 402 and installed in the groove 462 of the shield beam body 402, and the first hydraulic drive device 470 is connected with the first side guard plate 472, and the core function is to realize the extension and retraction movement through the hydraulic drive, thereby driving the first side guard plate 472 to move transversely relative to the shield beam body 402.

[0036] In the related art, the hydraulic support used in the mining of the extremely thin coal seam, part of the driving device is directly arranged on the side surface of the shield beam towards the supporting space, which occupies the narrow supporting space and further compresses the operation space and equipment arrangement space of the staff, resulting in inconvenience in operation. Another part of the driving device is buried in the shield beam, and when installing and dismounting, the structure of the shield beam body needs to be disassembled, and when replacing parts, adjusting parameters or maintaining pipelines, the operation is complicated and the efficiency is low. The traditional layout of two-column support makes the load transfer concentrated, and the support force of the top beam on the roof is unevenly distributed, which is easy to cause the support to be crushed when the roof is pressed, affecting the continuity of operation.

[0037] The present application aims at the above situation, through structural design to realize double optimization, both space saving and operation convenience. The recess 462 is arranged on the shield beam body 402, the slot opening of the recess 462 is towards the supporting space 460, the first hydraulic driving device 470 is installed in the recess 462, compared with the existing installation mode, it does not occupy the effective area of the supporting space 460, under the premise of ensuring the supporting strength, it leaves sufficient space for the staff operation and equipment arrangement, the opening design of the recess 462 in the low working condition of the extremely thin coal seam exposes the first hydraulic driving device 470 to the side of the supporting space 460, the staff does not need to disassemble the shield beam body 402, can directly contact the first hydraulic driving device 470 through the opening, easily complete the installation, part replacement, parameter adjustment and pipeline connection maintenance and other operations, solve the operation inconvenience problem caused by the driving device buried in the related art.

[0038] The hydraulic support 10 proposed in the present application adopts a distributed layout of at least four support columns 200, the present application designs a four-column support shield type hydraulic support 10 suitable for the extremely thin coal seam, makes the support force of the top beam 300 more evenly distributed, disperses the concentrated load when the roof is pressed, greatly improves the impact resistance and stability of the support, solves the problem of easy crushing of the traditional support. The base 100, the top beam 300 and the shield beam body 402 form a closed supporting space 460, cooperate with the gap filling function of the first side guard plate 472, build a comprehensive protection system, effectively isolate the roof gangue.

[0039] In this embodiment, on the one hand, the recess 462 is a flat-bottomed groove, which is convenient for processing. On the other hand, the recess 462 is a stepped structure, the bottom is used for fixing the first hydraulic driving device 470, and the upper stepped surface is used for arranging pipeline buckles and protective plates, which not only ensures the installation stability, but also realizes pipeline storage.

[0040] In this embodiment, a reversible protective cover is arranged at the opening edge of the recess 462, the protective cover is closed in the non-operation state to prevent the gangue from colliding with the first hydraulic driving device 470, and is turned over when operating, which takes into account the protection and convenience.

[0041] In this embodiment, the first hydraulic drive device 470 is specifically a side-push hydraulic jack, which includes a cylinder, a piston rod, and a hydraulic interface. The cylinder is connected to the shield beam 402, and the piston rod is connected to the first side guard plate 472, thereby transmitting the linear motion of the piston. The hydraulic lines of the first hydraulic drive device 470 are connected inside the groove 462 or at the edge of the opening via quick-connect couplings. The cylinder of the first hydraulic drive device 470 is installed in the groove 462 of the shield beam 402 by bolting or welding. The inner wall of the groove 462 is provided with positioning protrusions or positioning plates to ensure that the first hydraulic drive device 470 is installed accurately without lateral displacement, and the installation process can be directly operated through the opening of the groove 462.

[0042] The first sidewall plate 472 is a high-strength structural steel plate with a specific shape. The side of the first sidewall plate 472 facing the roadway sidewall serves as the working face, while the side facing away from the roadway has a hinged seat welded on for connection. The hinged seat is hinged to the side push rod 480 from the first hydraulic drive device 470 via a pin, allowing the first sidewall plate 472 to move linearly under external force. When roadway sidewall support is required, the hydraulic system supplies fluid to the first hydraulic drive device 470, driving the piston rod to extend and smoothly push out the first sidewall plate 472 until the working face is tightly pressed against the roadway sidewall, forming effective lateral support. When the coal mining machine needs to pass or the support needs to be moved, the hydraulic system controls the piston rod of the first hydraulic drive device 470 to retract, pulling the first sidewall plate 472 back to make room.

[0043] In this embodiment, wear-resistant protrusions or anti-slip liners can be welded to the outer side of the first side guard plate 472 to enhance the fit with the adjacent bracket first side guard plate 472 and improve wear resistance.

[0044] In this embodiment, the support column 200 is the component that provides the main support force for the top plate, and the support column 200 is a hydraulic telescopic structure. Each support column 200 consists of an outer cylinder and an inner piston assembly, forming a telescopic hydraulic cylinder. By injecting or discharging high-pressure liquid into the upper and lower chambers of the support column 200 through an external hydraulic control system, the extension length and supporting force of the piston can be controlled, thereby realizing the lifting, load-bearing, and posture adjustment of the support.

[0045] In this embodiment, the number of support columns 200 can also be six or eight, distributed proportionally at both ends of the base 100, further increasing the support points and making the support force distribution of the top beam 300 more uniform, adapting to the complex working conditions of concentrated pressure on the top plate.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, optionally, the shield beam 402 includes: a base plate 404 connected to the top beam 300, the base plate 404 including a mounting surface 406 facing the support space 460, a first hydraulic drive device 470 disposed on the mounting surface 406 of the base plate 404; a first main reinforcement 408 disposed on the mounting surface 406 of the base plate 404; and a second main reinforcement 410 disposed on the mounting surface 406 of the base plate 404, the second main reinforcement 410 and the first main reinforcement 408 being along the width direction of the base plate 404 (e.g., ...). Figure 2 (As indicated by arrow B) spaced apart; a first stiffening plate 420, disposed on the mounting surface 406 of the base plate 404, located between the first main stiffening rib 408 and the second main stiffening rib 410, one end of the first stiffening plate 420 is connected to the first main stiffening rib 408, and the other end of the first stiffening plate 420 is connected to the second main stiffening rib 410; a rear plate assembly 422, disposed on the mounting surface 406 of the base plate 404, the rear plate assembly 422 and the first stiffening plate 420 are arranged along the length direction of the base plate 404 (e.g., as indicated by arrow B); a first stiffening plate 420, disposed on the mounting surface 406 of the base plate 404, the rear plate assembly 422 and the first stiffening plate 420 are arranged along the length direction of the base plate 404 (e. Figure 2 (In the direction indicated by the middle arrow A) the rear plate assembly 422 is arranged at intervals and is connected to the first main rib 408 and the second main rib 410 respectively; the bottom plate 404, the first main rib 408, the second main rib 410, the first rib plate 420 and the rear plate assembly 422 enclose to form a groove 462.

[0047] In this embodiment, the protective beam 402 is composed of a base plate 404, a first main rib 408, a second main rib 410, a first stiffening plate 420, and a rear plate assembly 422. The base plate 404 serves as the base plate and includes a mounting surface 406 facing the support space 460. The first main rib 408 and the second main rib 410 are arranged longitudinally on the mounting surface 406 of the base plate 404, parallel and spaced apart. The first stiffening plate 420 is laterally connected to the mounting surface 406 between the first main rib 408 and the second main rib 410, with both ends connected to them respectively. The rear plate assembly 422 is also arranged on the mounting surface 406 and is longitudinally spaced from the first stiffening plate 420. The rear plate assembly 422 is connected to the first main rib 408 and the second main rib 410 respectively. These components together enclose a groove 462 open towards the support space 460.

[0048] Through the aforementioned structural design, this invention achieves the creation of a recess 462 while ensuring the main strength of the protective beam 402. The mounting position of the first hydraulic drive device 470 is transformed from an external additional structure into an embedded space defined by the main load-bearing structure itself, achieving a high degree of spatial integration and unity between the equipment installation and the structural body. This not only saves the additional structural space required by traditional external installation methods, but also provides an extremely stable and reliable installation foundation and operating environment for the built-in drive device, thanks to the high structural strength of the recess 462 directly surrounded by high-strength reinforcing plates.

[0049] like Figure 2 and Figure 3 As shown, in some embodiments, the rear plate assembly 422 includes: a second stiffener 424, which is disposed opposite to the first stiffener 420; a third stiffener 426, which is connected to one end of the second stiffener 424 and extends along the length direction of the bottom plate 404, and has a gap between the third stiffener 426 and the first main stiffener 408; and a fourth stiffener 428, which is connected to the end of the third stiffener 426 away from the second stiffener 424 and extends along the width direction of the bottom plate 404, and is connected to the first main stiffener 408. The fifth stiffener 430 is connected to the other end of the second stiffener 424. The fifth stiffener 430 extends along the length direction of the base plate 404 and has a gap with the second main stiffener 410. The sixth stiffener 432 is connected to the end of the fifth stiffener 430 away from the second stiffener 424. The sixth stiffener 432 extends along the width direction of the base plate 404 and is connected to the first main stiffener 408. Along the length direction of the base plate 404, the second stiffener 424 is closer to the first stiffener 420 relative to the fourth stiffener 428 and the fifth stiffener 430.

[0050] In this embodiment, for the rear plate assembly 422, the present invention provides that the rear plate assembly 422 includes a second stiffener 424, a third stiffener 426, a fourth stiffener 428, a fifth stiffener 430, and a sixth stiffener 432. The second stiffener 424 is an intermediate reference member of the rear plate assembly 422, and is arranged relatively parallel to the first stiffener 420. Both are perpendicular to the surface of the base plate 404 and extend along the width direction of the base plate 404, together forming the front and rear reference surfaces of the assembly.

[0051] One end of the third stiffener 426 is connected to one side end of the second stiffener 424, and the whole extends along the length of the base plate 404. The extension trajectory of the third stiffener 426 is parallel to the first main stiffener 408, and a gap is reserved between the two to avoid structural interference and provide space for subsequent assembly.

[0052] The fourth stiffener 428 is connected to the other end of the third stiffener 426 away from the second stiffener 424. The extension direction of the fourth stiffener 428 is the width direction of the bottom plate 404, and its end is connected to the side of the first main stiffener 408 to form a transverse closed structure.

[0053] The fifth stiffener 430 is connected to the other end of the second stiffener 424 and is symmetrically distributed with the third stiffener 426. It also extends along the length of the bottom plate 404 and maintains the same gap with the second main stiffener 410 as the third stiffener 426 and the first main stiffener 408.

[0054] The sixth stiffener 432 is connected to the fifth stiffener 430 at one end away from the second stiffener 424, extends along the width direction of the bottom plate 404, and its end is connected to the first main stiffener 408, forming a symmetrical transverse closed structure with the fourth stiffener 428.

[0055] Along the length of the base plate 404, the second stiffener 424 is positioned closer to the first stiffener 420 than the fourth stiffener 428 and the fifth stiffener 430. Specifically, the distance from the second stiffener 424 to the first stiffener 420 is greater than the distance from the fourth stiffener 428 to the second stiffener 424, and the distance from the second stiffener 424 to the first stiffener 420 is greater than the distance from the fifth stiffener 430 to the second stiffener 424. The second stiffener 424 is located on the inner side of the assembly, while the fourth stiffener 428 and the fifth stiffener 430 are located on the outer side, creating a staggered inner and outer layout.

[0056] Through the arrangement and connection of the aforementioned components, the rear plate assembly 422 forms a U-shaped groove 462 structure on the plane of the base plate 404. The internal space of the U-shaped groove 462 provides a precise installation cavity for the side-push jack. The opening of the U-shaped structure faces the first stiffening plate 420, and together with the reserved gaps between the components, it provides ample operating space for workers to connect the inlet and outlet hoses of the side-push jack and replace easily damaged parts such as seals, thus solving the problem of inconvenient maintenance caused by the narrow internal space of the ultra-thin coal seam support.

[0057] In this embodiment, the second stiffener 424 is vertically welded to the base plate 404 and is arranged parallel to the first stiffener 420. The third stiffener 426 is welded to the second stiffener 424 and the base plate 404. The fourth stiffener 428 is welded to the third stiffener 426 and the first main stiffener 408. The main function of the fourth stiffener 428 is to close the outer end of the third stiffener 426, forming a U-shaped lateral support, and at the same time, to distribute the load transmitted by the third stiffener 426 to the first main stiffener 408, realizing the step-by-step transmission of load. The fifth stiffener 430 and the third stiffener 426 are symmetrically arranged, and the sixth stiffener 432 and the fourth stiffener 428 are symmetrically arranged.

[0058] like Figure 2 and Figure 3As shown, in some embodiments, the protective beam 402 further includes: a third main reinforcement 412, a fourth main reinforcement 414, a fifth main reinforcement 416, and a sixth main reinforcement 418, disposed on the base plate 404 and extending along the length direction of the base plate 404; along the width direction of the base plate 404, the third main reinforcement 412, the fourth main reinforcement 414, the first main reinforcement 408, the second main reinforcement 410, the fifth main reinforcement 416, and the sixth main reinforcement 418 are arranged sequentially and have gaps between them; a seventh reinforcement plate 434 is disposed on the base plate 404 and extends along the width direction of the base plate 404, the seventh reinforcement plate 434 is connected to one side of the fourth main reinforcement 414, one end of the first main reinforcement 408, one end of the second main reinforcement 410, and one side of the fifth main reinforcement 416 respectively; an eighth... Eighth stiffener 436 is connected to one end of the rear plate assembly 422 away from the mounting surface 406 of the base plate 404; Ninth stiffener 438 is disposed between the fourth main stiffener 414 and the first main stiffener 408, one end of the ninth stiffener 438 is connected to the fourth main stiffener 414, the other end of the ninth stiffener 438 is connected to the first main stiffener 408, and the ninth stiffener 438 extends along the length direction of the base plate 404; Tenth stiffener 440 is disposed between the fifth main stiffener 416 and the second main stiffener 410, one end of the tenth stiffener 440 is connected to the fifth main stiffener 416, the other end of the tenth stiffener 440 is connected to the second main stiffener 410, and the tenth stiffener 440 extends along the length direction of the base plate 404.

[0059] In this embodiment, the protective beam 402 of the present invention adopts a six-main-reinforcement structure, which is different from the conventional four-main-reinforcement design in related technologies. Through the precise connection of the main reinforcement and multiple stiffening plates, an integrated structure that combines strength and space optimization is constructed.

[0060] In this embodiment, the third main reinforcement 412, the fourth main reinforcement 414, the fifth main reinforcement 416, and the sixth main reinforcement 418 are all made of high-strength plates and are vertically fixed to the base plate 404 of the shield beam. They extend along the length of the base plate 404 as a whole, forming the load-bearing skeleton of the shield beam 402. Along the width of the base plate 404, the six main reinforcements are arranged in the following order: third main reinforcement 412 - fourth main reinforcement 414 - first main reinforcement 408 - second main reinforcement 410 - fifth main reinforcement 416 - sixth main reinforcement 418. A reasonable gap is reserved between any two adjacent main reinforcements to avoid structural interference and to provide space for the assembly of subsequent components.

[0061] The seventh stiffener 434 is disposed on the base plate 404 and extends laterally along the width direction of the base plate 404. One end of the seventh stiffener 434 is connected to the side of the fourth main stiffener 414. The middle part of the seventh stiffener 434 is connected to the end of the first main stiffener 408 and the end of the second main stiffener 410 in sequence. The other end of the seventh stiffener 434 is connected to the side of the fifth main stiffener 416, forming a transverse connection structure spanning four main stiffeners.

[0062] In this embodiment, the seventh stiffener 434 is welded to one side of the fourth main stiffener 414, one end of the first main stiffener 408, one end of the second main stiffener 410, and one side of the fifth main stiffener 416. The eighth stiffener 436 is a sheet-like structure and is connected to the end of the rear plate assembly 422 opposite to the bottom plate 404. The eighth stiffener 436 is welded to the end of the rear plate assembly 422 opposite to the bottom plate 404. The ninth stiffener 438 is located in the gap between the fourth main stiffener 414 and the first main stiffener 408, extending longitudinally along the length of the bottom plate 404. The two sides of the ninth stiffener 438 are connected to the inner side of the fourth main stiffener 414 and the outer side of the first main stiffener 408, respectively, forming a longitudinally separated structure. The tenth stiffener 440 and the ninth stiffener 438 are symmetrically distributed and located in the gap between the fifth main stiffener 416 and the second main stiffener 410. They extend longitudinally along the length of the bottom plate 404 and are connected to the inner side of the fifth main stiffener 416 and the outer side of the second main stiffener 410 on both sides, forming a symmetrical longitudinal separation structure with the ninth stiffener 438.

[0063] In this embodiment, the six-main-reinforcement structure of the present invention significantly improves the load-bearing foundation of the shield beam 402 compared with the traditional four-main-reinforcement structure. By adding two main reinforcements, the number of load-bearing points increases and the load-bearing area expands, effectively dispersing the concentrated load brought by the roof pressure. It solves the problem of insufficient strength and easy bending deformation of the existing four-main-reinforcement structure under the complex working conditions of extremely thin coal seams. In particular, it can cope with the impact load when the roof comes down, reducing the risk of the support being crushed.

[0064] This invention utilizes a combination of main ribs and stiffening plates to form four enclosed box structures. These four boxes are arranged around the U-shaped semi-box in the center of the protective beam 402, forming a three-dimensional enclosed support structure. This transforms the protective beam 402 from a single linear load-bearing structure to a multi-box collaborative load-bearing structure, improving the overall structural rigidity, stability, and resistance to torsional deformation. The reserved gaps between adjacent main ribs complement the internal space of the box structures, ensuring structural compactness while providing ample space for the piping arrangement of the side-push jacks and the hinged assembly of the front connecting rod 464 and the rear connecting rod 476.

[0065] like Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, the shield beam 400 further includes a first connecting rod 464, which includes: two connecting rod segments 466 extending along the length direction of the first connecting rod 464 and spaced apart from each other; a plurality of connecting segments 468 connected between the two connecting rod segments 466, the plurality of connecting segments 468 and the two connecting rod segments 466 forming a box structure; a portion of one of the connecting rod segments 466 is disposed between the third main rib 412 and the fourth main rib 414, and a portion of the other connecting rod segment 466 is disposed between the fourth main rib 414 and the first main rib 408; the shield beam 400 further includes: a first mounting pin 474, the first mounting... A mounting pin 474 passes through the third main reinforcement 412, a connecting rod segment 466, the fourth main reinforcement 414, another connecting rod segment 466, and the first main reinforcement 408, so that the first connecting rod 464 is hinged to the shield beam 402; the second connecting rod 476 is an integral connecting rod; part of the second connecting rod 476 is located between the third main reinforcement 412 and the fourth main reinforcement 414, along the length direction of the base plate 404, and the second connecting rod 476 is farther away from the first hydraulic drive device 470 than the first connecting rod 464; the second mounting pin 478 passes through the third main reinforcement 412, the fourth main reinforcement 414, and the second connecting rod 476, so that the second connecting rod 476 is hinged to the shield beam 402.

[0066] In this embodiment, the shield beam 400 further includes a first connecting rod 464, a first mounting pin 474, a second connecting rod 476, and a second mounting pin 478. The first connecting rod 464 consists of two connecting rod segments 466 and multiple connecting segments 468, with the two connecting rod segments 466 extending along the length of the first connecting rod 464 (e.g., along the length of the first connecting rod 464). Figure 6 Extending in the direction indicated by the middle arrow G, the two are arranged in parallel intervals, forming the two side skeletons of the I-shaped structure. Multiple connecting segments 468 are vertically connected between the two connecting rod segments 466, evenly distributed along the length of the connecting rod, and together with the two connecting rod segments 466, they enclose a closed local box structure, strengthening the load-bearing capacity of the connecting rod.

[0067] The installation position of the first link 464 is adapted to the gap between the main reinforcement bars of the shield beam 402. Part of one link segment 466 is embedded in the gap between the third main reinforcement bar 412 and the fourth main reinforcement bar 414, and part of the other link segment 466 is embedded in the gap between the fourth main reinforcement bar 414 and the first main reinforcement bar 408. The embedded installation of the link is achieved through the gap between the main reinforcement bars, maximizing the use of space.

[0068] The first mounting pin 474 is horizontally inserted along the width of the base plate 404, passing sequentially through the third main reinforcement 412, one link segment 466 of the first connecting rod 464, the fourth main reinforcement 414, the other link segment 466 of the first connecting rod 464, and the first main reinforcement 408. The two ends of the pin are fixed by locking parts, so that the first connecting rod 464 and the shield beam 402 form a firm hinged connection, ensuring that the connecting rod can rotate flexibly around the pin.

[0069] The second connecting rod 476 adopts an integral structure, processed from a single piece of high-strength plate. Its structure is simple and without segmented splicing. A portion of the second connecting rod 476 is embedded in the gap between the third main rib 412 and the fourth main rib 414. Along the length of the base plate 404, the installation position of the second connecting rod 476 is further away from the first hydraulic drive device 470 than that of the first connecting rod 464. The second mounting pin 478 is horizontally inserted along the width of the base plate 404, passing sequentially through the third main rib 412, the second connecting rod 476, and the fourth main rib 414. Both ends of the pin are fixed by locking devices, achieving a hinged connection between the second connecting rod 476 and the shield beam 402.

[0070] The box structure design of the double connecting rod segment 466 and multiple connecting segments 468 of the first connecting rod 464 in this invention, compared with the traditional integral box structure of the connecting rod, reduces the amount of material used while ensuring the same load-bearing strength, thus achieving lightweighting of the connecting rod. At the same time, the closed box structure can effectively disperse impact loads and avoid local stress concentration in the connecting rod, thus solving the contradiction of insufficient strength caused by traditional lightweight design.

[0071] The embedded installation of the first connecting rod 464 makes full use of the reserved gaps between the third main reinforcement 412 and the fourth main reinforcement 414, and between the fourth main reinforcement 414 and the first main reinforcement 408, without occupying additional external space, making the connection between the connecting rod and the shield beam 402 more compact, which meets the compact and low requirements of the ultra-thin coal seam support.

[0072] The second link 476 adopts an integral structure, which is suitable for its low-stress working conditions. While simplifying the structure, reducing the processing difficulty and cost, it also reduces splicing welds and lowers the risk of weld cracking. The front and rear layout of the second link 476 and the first link 464 not only ensures the dual support stability of the connection between the shield beam 402 and the base assembly, but also avoids motion interference between components.

[0073] In this embodiment, hinge holes are machined at both ends of the connecting rod segment 466, and the diameter of the holes is adapted to the diameter of the first mounting pin 474.

[0074] In this embodiment, the connecting segment 468 is made of the same high-strength alloy steel plate as the connecting rod segment 466, and is vertically welded between the two connecting rod segments 466. The connecting segment 468 is evenly distributed along the length of the connecting rod to form a longitudinal and transverse grid support structure, which together with the two connecting rod segments 466 constitutes a closed box.

[0075] In this embodiment, the multiple connecting segments 468 of the first connecting rod 464 include a first sub-connecting segment 494, a second sub-connecting segment 495, a third sub-connecting segment 496, and a fourth sub-connecting segment 497. The four sub-connecting segments together with the two connecting rod segments 466 form a closed parallelogram box structure, which not only strengthens the load-bearing strength and overall rigidity of the first connecting rod 464, but also achieves a lightweight structural design.

[0076] In some embodiments of the present invention, the shield beam assembly further includes a third link and a fourth link. The third link has the same structure as the first link 464, employing a partial box structure with two link segments and multiple connecting segments. The two link segments extend parallel to each other along the length of the third link, and multiple connecting segments 468 are vertically fixed between the two link segments, together forming a closed partial box. The installation position of the third link is symmetrical to that of the first link 464. A portion of one link segment is embedded in the gap between the second main rib 410 and the fifth main rib 416, and a portion of the other link segment is embedded in the gap between the fifth main rib 416 and the sixth main rib 418. Embedded installation is achieved through the gap of the right main rib, forming a symmetrical space occupation pattern with the left first link 464.

[0077] The fifth mounting pin is horizontally inserted along the width of the base plate 404, passing through the second main rib 410, one link segment of the third link, the fifth main rib 416, the other link segment of the third link, and the sixth main rib 418 in sequence. The two ends of the pin are fixed by locking parts, so that the third link and the shield beam 402 are hinged together, and the rotation direction is consistent with the first link 464. Together, they form a left-right symmetrical front hinged support.

[0078] The fourth link has the same structure as the second link 476, being an integral high-strength plate structure without segmented splicing, resulting in a simple and compact structure. The installation position of the fourth link is symmetrical to that of the second link 476, along the length of the base plate 404. Compared to the third link, the fourth link is further away from the first hydraulic drive device 470, with a portion of it embedded in the gap between the second main rib 410 and the fifth main rib 416, forming a front-to-back double-link layout on the right side with the third link.

[0079] The sixth mounting pin is horizontally inserted along the width of the base plate 404, passing through the second main rib 410, the fourth connecting rod, and the fifth main rib 416 in sequence. Both ends are fixed by locking devices to achieve the hinge connection between the fourth connecting rod and the shield beam 402. It echoes the second mounting pin 478 on the left and right, and together they form a symmetrical rear hinge support.

[0080] In terms of overall layout, the first link 464 and the third link are symmetrical about the U-shaped semi-box in the middle of the protective beam 402. The second link 476 and the fourth link are also symmetrical about the U-shaped semi-box. The four links are embedded in the corresponding gaps between the six main reinforcement bars, forming two sets on the left and right and two pairs of front and rear links with symmetrical hinged structure, which constitutes a complete force transmission system.

[0081] like Figure 2 and Figure 3 As shown, in some embodiments, the protective beam 402 further includes: an eleventh stiffening plate 442, disposed between the third main reinforcement 412 and the fourth main reinforcement 414 in the base plate 404, and the eleventh stiffening plate 442 is connected to the third main reinforcement 412 and the fourth main reinforcement 414 respectively; a twelfth stiffening plate 444, disposed between the third main reinforcement 412 and the fourth main reinforcement 414, and the twelfth stiffening plate 444 is connected to the third main reinforcement 412 and the fourth main reinforcement 414 respectively, and there is a gap between the eleventh stiffening plate 442 and the twelfth stiffening plate 444 along the length direction of the base plate 404; and a thirteenth stiffening plate 446, disposed between the third main reinforcement 412 and the fourth main reinforcement 414, the thirteenth stiffening plate 446 is connected to the third main reinforcement 412 and the fourth main reinforcement 414 respectively, and the thirteenth stiffening plate 446 is connected to the end of the eleventh stiffening plate 442 and the twelfth stiffening plate 444 away from the base plate 404 respectively.

[0082] In this embodiment, the protective beam 402 also includes an eleventh stiffener 442, a twelfth stiffener 444, and a thirteenth stiffener 446. By adding the eleventh stiffener 442, the twelfth stiffener 444, and the thirteenth stiffener 446, the present invention further strengthens the connection strength between the third main stiffener 412 and the fourth main stiffener 414.

[0083] The eleventh stiffener plate 442 is vertically installed on the bottom plate 404 of the shield beam, located in the gap between the third main reinforcement 412 and the fourth main reinforcement 414. The two sides of the eleventh stiffener plate 442 are connected to the inner side of the third main reinforcement 412 and the outer side of the fourth main reinforcement 414 respectively, forming a longitudinal support structure.

[0084] The twelfth stiffener 444 and the eleventh stiffener 442 are made of the same material and have the same structure. They are also vertically set in the gap between the third main stiffener 412 and the fourth main stiffener 414. Along the length of the bottom plate 404, the twelfth stiffener 444 and the eleventh stiffener 442 are distributed at intervals. The two sides of the twelfth stiffener 444 are also fixed to the third main stiffener 412 and the fourth main stiffener 414 by welding. The twelfth stiffener 444 and the eleventh stiffener 442 form a parallel and symmetrical longitudinal support structure.

[0085] The thirteenth stiffener 446 is a transverse connecting plate, which is set in the upper region between the third main stiffener 412 and the fourth main stiffener 414. It extends along the width direction of the bottom plate 404. The two ends of the thirteenth stiffener 446 are connected to the eleventh stiffener 442 and the twelfth stiffener 444 respectively away from the upper end face of the bottom plate 404, and are also connected to the inner side wall of the third main stiffener and the fourth main stiffener 414 to form a transverse closed structure. In this embodiment, the eleventh stiffener 442, the twelfth stiffener 444, the thirteenth stiffener 446, the third main stiffener 412, the fourth main stiffener 414, and the bottom plate 404 together form a closed rectangular box structure. This invention upgrades the original linear main stiffener support to a box-type support by using three stiffeners to form a closed box structure with the third and fourth main stiffeners 412 and 414. This improves the bending resistance between the third and fourth main stiffeners 412 and 414, effectively disperses the localized concentrated load caused by roof pressure, and solves the problem of insufficient strength caused by traditional main stiffener gaps relying solely on a single stiffener. It is particularly effective in resisting the instantaneous impact of pressure from the roof of extremely thin coal seams.

[0086] like Figure 2 and Figure 3 As shown, in some embodiments, the protective beam 402 further includes a fourteenth stiffening plate, disposed on the base plate 404, located between the fifth main reinforcement 416 and the sixth main reinforcement 418, and connected to both the fifth and sixth main reinforcements 416 and 418 respectively; a fifteenth stiffening plate, disposed on the base plate 404, located between the fifth and sixth main reinforcements 416 and 418, and connected to both the fifth and sixth main reinforcements 416 and 418 respectively. A gap exists between the fifteenth and fourteenth stiffening plates along the length of the base plate 404; a sixteenth stiffening plate, disposed between the fifth and sixth main reinforcements 416 and 418, connected to both the fifth and sixth main reinforcements 416 and 418 respectively, and connected to the ends of the fourteenth and fifteenth stiffening plates opposite to the base plate 404 respectively.

[0087] In this embodiment, the fourteenth, fifteenth, and sixteenth stiffening plates, together with the fifth and sixth main reinforcing bars 416 and the bottom plate 404, form a closed rectangular box structure. This invention upgrades the original linear main reinforcement support to a box-type support by using three stiffening plates enclosed by the fifth and sixth main reinforcing bars 416 and 418 to form a closed box structure. This improves the bending resistance between the fifth and sixth main reinforcing bars 416 and 418, effectively disperses the localized concentrated load caused by roof pressure, and solves the problem of insufficient strength caused by relying solely on a single stiffening plate for support between traditional main reinforcement gaps. It is particularly effective in resisting the instantaneous impact of pressure from the roof of extremely thin coal seams.

[0088] In some embodiments, the protective beam 402 further includes a seventeenth-rib plate 448 and an eighteenth-rib plate 450, wherein the third main reinforcement 412 and the fourth main reinforcement 414 are welded to the front side of the seventeenth-rib plate 448 to form a rear-end support and positioning structure. The eighteenth-rib plate 450 is welded to the rear end of the fifth main reinforcement 416 and the sixth main reinforcement 418, and has no cover plate at the upper end, forming a semi-box structure together with the corresponding main reinforcement.

[0089] In some embodiments, the shield beam 402 further includes a nineteenth stiffener 454 and a twentieth stiffener 452, forming a hinged structure with the top beam 300.

[0090] like Figure 4 and 5 As shown, in some embodiments, the shield beam 400 further includes a side push rod 480, which extends along the width direction of the base plate 404. One end of the side push rod 480 is hinged to the first hydraulic drive device 470 via a first connecting pin 482, and the other end of the side push rod 480 is hinged to the first side guard plate 472 via a second connecting pin 484.

[0091] In this embodiment, the shield beam 400 also includes a side push rod 480, which extends along the width direction of the base plate 404 and forms a transmission assembly between the first hydraulic drive device 470 and the first side guard plate 472.

[0092] Specifically, one end of the side push rod 480 is hinged to the piston rod end of the first hydraulic drive device 470 via a first connecting pin 482, and the other end of the side push rod 480 is hinged to the first side guard plate 472 via a second connecting pin 484. Thus, the telescopic movement of the first hydraulic drive device 470 is directly converted into the lateral movement of the first side guard plate 472 relative to the shield beam 402 via a rigid transmission chain composed of the first connecting pin 482, the side push rod 480, and the second connecting pin 484. The extension of the side push rod 480 along its width allows it to effectively traverse the space between the built-in drive device and the lateral movable guard plate. The hinge points of the first connecting pin 482 and the second connecting pin 484 respectively constitute the input and output ends of the transmission chain, realizing the conversion and transmission of motion.

[0093] In this embodiment, two first side guard plates 472 and two independent transmission assemblies can be symmetrically arranged on the left and right sides of the shield beam 400. The left side push rod is hinged to the left first hydraulic drive device and the left first side guard plate via a first connecting pin and a second connecting pin. The right side push rod is hinged to the right first hydraulic drive device and the right first side guard plate via a first connecting pin and a second connecting pin, thereby forming a symmetrical independent support and adjustment capability.

[0094] like Figure 4 and Figure 5 As shown, in some embodiments, the protective beam 400 further includes a first pre-tensioning assembly 486, which includes: a spring limiting plate 488 disposed on the side of the fourth main rib 414 away from the third main rib 412; a sleeve 490 disposed between the spring limiting plate 488 and the first main rib 408; a spring guide rod 491 disposed inside the sleeve 490 and passing through the fourth main rib 414 and the third main rib 412, one end of the spring guide rod 491 being connected to the first side guard plate 472; and a pre-tensioning spring 492 sleeved on the outside of the spring guide rod 491; wherein one end of the pre-tensioning spring 492 abuts against the spring limiting plate 488, and the other end abuts against the first side guard plate 472.

[0095] In this embodiment, the protective beam 400 further includes a first pre-tensioning assembly 486, which consists of four parts: a spring limiting plate 488, a sleeve 490, a spring guide rod 491, and a pre-tensioning spring 492. The spring limiting plate 488 is fixedly disposed on the side of the fourth main rib 414 opposite to the third main rib 412, forming a stable connection with the fourth main rib 414. The sleeve 490 is disposed between the spring limiting plate 488 and the first main rib 408, with both ends respectively in contact with the spring limiting plate 488 and the first main rib 408, forming a guide channel. The spring guide rod 491 passes through the inside of the sleeve 490, and also passes through the pre-set through holes of the fourth main rib 414 and the third main rib 412. One end of the spring guide rod 491 is fixedly connected to the first side guard plate 472, and the other end extends to the outside of the sleeve 490 while maintaining a certain amount of movement. The preload spring 492 is sleeved on the outside of the spring guide rod 491. One end of the preload spring 492 abuts against the inner surface of the spring limiting plate 488, and the other end directly abuts against the inner wall of the first side guard plate 472, providing continuous force through the pre-compression state.

[0096] Conventional structures require welding a spring sleeve onto the shield beam to house the preload spring, and indirectly transmit thrust through a spring guide rod. This invention eliminates the need for an external spring sleeve, allowing the preload spring 492 to act directly on the first side guard plate 472. The preload spring 492 consistently provides a continuous lateral thrust, enabling the first side guard plate 472 to tightly conform to the corresponding structure of the adjacent support, effectively filling the small gaps between supports and reducing the risk of rockfall. The spring guide rod 491 and the sleeve 490 form a precise guiding fit, limiting the movement trajectory of the first side guard plate 472, ensuring smooth and unbiased lateral movement of the first side guard plate 472, and preventing jamming.

[0097] The design eliminates the need for an external spring sleeve 490, effectively reducing the installation space at the front and rear connecting rods and meeting the core requirements of compact and low-profile support for ultra-thin coal seams. The entire assembly has a compact structure, with all components arranged close to the main reinforcement and the first side guard plate 472, without occupying additional support space 460. The elastic properties of the preload spring 492 can buffer the impact load on the first side guard plate 472, protecting the first side guard plate 472 and the drive unit, and extending the service life of the components.

[0098] In this embodiment, the sleeve 490, the spring limiting plate 488, and the first main rib 408 can be fixed by welding. The spring limiting plate 488 and the fourth main rib 414 can also be connected by welding to improve the overall load-bearing capacity.

[0099] In this embodiment, the first pretensioning assembly 486 further includes a third connecting pin 498, and the spring guide rod 491 is connected to the first side guard plate 472 through the third connecting pin 498.

[0100] In some embodiments, there are two first pretensioning components 486, which are symmetrically distributed along the length of the base plate 404 with the first hydraulic drive device 470 as the center.

[0101] In this embodiment, there are two first pretensioning components 486. The two first pretensioning components 486 have completely identical structures, each including a spring limiting plate 488, a sleeve 490, a spring guide rod 491, and a pretensioning spring 492. The two first pretensioning components 486 are symmetrically distributed along the length of the base plate 404 with the first hydraulic drive device 470 as the center. That is, one first pretensioning component 486 is located on the side of the first hydraulic drive device 470 near the front end of the bracket, and the other is located on the side of the first hydraulic drive device 470 near the rear end of the bracket. The spring limiting plate 488 of each first pretensioning component 486 is fixed to the side of the fourth main rib 414 opposite to the third main rib 412. The connection relationship of the sleeve 490, the spring guide rod 491, and the pretensioning spring 492 is consistent with the basic structure scheme. In some embodiments, the hydraulic support 10 further includes a second pretensioning component, which is disposed between the sixth main rib 418 and the second main rib 410, and is symmetrical to the first pretensioning component 486 about the center line of the width direction of the base plate 404.

[0102] In this embodiment, the hydraulic support 10 further includes a second pre-tightening assembly. The structure of the second pre-tightening assembly is the same as that of the first pre-tightening assembly 486, and it is also composed of a spring limiting plate 488, a sleeve 490, a spring guide rod 491, and a pre-tightening spring 492. The second pre-tightening assembly is disposed between the sixth main rib 418 and the second main rib 410. The spring limiting plate 488 is fixed to the side of the sixth main rib 418 away from the second main rib 410. The sleeve 490 is disposed between the spring limiting plate 488 and the second main rib 410. The spring guide rod 491 passes through the sleeve 490 and through the sixth main rib 418 and the second main rib 410. One end of the spring guide rod 491 is fixedly connected to the first side guard plate 472 on the right side. The pre-tightening spring 492 is sleeved on the outside of the spring guide rod 491, and its two ends abut against the spring limiting plate 488 and the first side guard plate 472 on the right side, respectively. The second pretensioning assembly and the first pretensioning assembly 486 are symmetrically distributed about the center line of the width direction of the base plate 404.

[0103] like Figure 5 As shown, in some embodiments, the shield beam 400 further includes: a first locking pin 493, which is detachably disposed on the shield beam body 402; wherein, the side push rod 480 is provided with a pin hole corresponding to the first locking pin 493; when the first locking pin 493 is inserted into the pin hole, the first locking pin 493 restricts the movement of the side push rod 480.

[0104] In this embodiment, the shield beam 400 further includes a first locking pin 493, which is a rigid component and features a detachable design. The shield beam 402 has mounting holes that match the size of the first locking pin 493, penetrating the corresponding portion of the shield beam 402 to ensure smooth insertion of the first locking pin 493. The side push rod 480 has pin holes corresponding to the first locking pin 493, with the pin holes perfectly aligned with the mounting holes of the shield beam 402 when the side push rod 480 is in a specific position. When it is necessary to restrict the movement of the side push rod 480, the first locking pin 493 is inserted from one side of the shield beam 402, passing sequentially through the mounting holes of the shield beam 402 and the pin holes of the side push rod 480. Both ends of the first locking pin 493 are fixed by locking components, achieving relative fixation between the side push rod 480 and the shield beam 402. When it is necessary to remove the restriction, simply disassemble the locking component and pull out the first locking pin 493.

[0105] During the transportation or maintenance of the bracket, the movement of the side guide rod 480 is restricted by the first locking pin 493, which effectively prevents the first side guard plate 472 from moving accidentally due to bumps or collisions, avoiding damage to the first side guard plate 472 or connecting parts, and ensuring the safety of the transportation and maintenance process. The first locking pin 493 has a simple structure and is easy to operate, requiring no complicated tools to insert and remove, reducing the difficulty of operation for workers. The detachable design does not affect the transmission function of the bracket during normal operation; when the bracket is put into use, simply removing the first locking pin 493 will restore the normal movement of the side guide rod 480.

[0106] In this embodiment, a convenient handle can be added to the end of the first locking pin 493. The handle is integrally formed or fixedly connected to the first locking pin 493, which makes it convenient for staff to hold and insert / remove the pin, thus improving operating efficiency.

[0107] In this embodiment, a wear-resistant bushing can be embedded in the inner wall of the pin hole of the side push rod 480 to reduce friction and wear between the first locking pin 493 and the pin hole, thereby extending the service life of the component.

[0108] In this embodiment, a positioning groove can be provided around the mounting hole of the shield beam 402, and a positioning protrusion is provided on the first locking pin 493. When inserted, the positioning protrusion is embedded in the positioning groove to ensure that the first locking pin 493 is installed accurately and to avoid axial movement.

[0109] like Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18As shown, in some embodiments, the base 100 includes: a base body 102, the base body 102 including a main body 172 and a first base main rib 104, a second base main rib 106, a third base main rib 110 and a fourth base main rib 112, along the width direction of the main body 172 (e.g., ...). Figure 9 The direction indicated by the middle arrow C, Figure 9 The middle arrow D indicates the length direction of the body 172) are arranged sequentially on the body 172, spaced apart from each other; the first plate 114 is arranged on the body 172, located between the first base main reinforcement 104 and the second base main reinforcement 106; the second plate 116 is arranged on the body 172, located between the first plate 114 and the second base main reinforcement 106.

[0110] In this embodiment, the base 100 includes a base body 102, a first plate 114, and a second plate 116. The base body 102 is composed of a main body 172, a first main base rib 104, a second main base rib 106, a third main base rib 110, and a fourth main base rib 112. The main body 172 is the basic load-bearing component of the base 100, providing a stable support surface. The first main base rib 104, the second main base rib 106, the third main base rib 110, and the fourth main base rib 112 are all rigid components, arranged sequentially and at intervals along the width direction of the main body 172 on the upper surface of the main body 172. Each main rib forms a stable connection with the main body 172, maintaining a uniform gap between them. The first plate 114 is disposed on the upper surface of the main body 172, located between the first main base rib 104 and the second main base rib 106. The two ends of the first plate 114 are respectively fitted and connected to the inner sidewalls of the first main base rib 104 and the second main base rib 106. The second plate 116 is also disposed on the upper surface of the main body 172, located between the first plate 114 and the second base main rib 106. One end of the second plate 116 is attached to the first plate 114, and the other end is attached to the inner side wall of the second base main rib 106, forming a multi-layer partition structure.

[0111] The four main ribs of the base are distributed along the width direction, which greatly improves the overall load-bearing strength and bending resistance of the base 100, effectively disperses the vertical load transmitted by the top plate, and prevents the base 100 from deforming due to excessive force.

[0112] In this embodiment, the first plate 114 cooperates with the first base main rib 104, and the second plate 116 cooperates with the second base main rib 106, forming two sets of symmetrical mounting seats, which together serve as the mounting base for the first connecting rod 464. A portion of the first connecting rod 464 is located in the gap between the first plate 114 and the first base main rib 104, and another portion is located in the gap between the second plate 116 and the second base main rib 106. The base 100 also includes a third mounting pin 166, which is sequentially inserted through the first base main rib 104, the corresponding portion of the first connecting rod 464, the first plate 114, the second plate 116, the other portion of the first connecting rod 464, and the second base main rib 106, thereby achieving a stable installation of the first connecting rod 464 and the base 102. Meanwhile, the first plate 114 and the first base main rib 104 together form a mounting seat for the second connecting rod 476. The corresponding area of ​​the second connecting rod 476 is embedded in the gap of the mounting seat. The base 100 also includes a fourth mounting pin 168, which is sequentially inserted through the first base main rib 104, the second connecting rod 476 and the first plate 114 to complete the hinged fixation of the second connecting rod 476 and the base body 102, further improving the compactness and stability of the connection between the base 100 and the connecting rod.

[0113] In this embodiment, multiple weight-reducing holes are machined on the first plate 114 and the second plate 116. The weight-reducing holes are evenly distributed, which reduces the overall weight of the base 100 without reducing the structural strength, making it easier to transport and install the bracket.

[0114] In this embodiment, the first base main rib 104, the second base main rib 106, the third base main rib 110, and the fourth base main rib 112 can be fixed to the body 172 by welding. The welding area covers the mating surface of the main rib and the body to ensure a stable connection.

[0115] like Figure 9 and Figure 10As shown, in some embodiments, the base body 102 further includes: a first box structure, the first box structure including a first vertical plate 118, a second vertical plate 120, and a first horizontal plate 122; the first vertical plate 118 is connected between the first plate 114 and the first base main rib 104; the second vertical plate 120 is connected between the first plate 114 and the first base main rib 104; the first horizontal plate 122 is connected between the first plate 114, the first base main rib 104, the first vertical plate 118, and the second vertical plate 120; a second box structure, the second box structure including a third vertical plate 124, a fourth vertical plate 126, and a second horizontal plate 128; the third vertical plate 124 is connected between the first plate 114 and the first vertical plate 128. Between the two plates 116; the fourth vertical plate 126 is connected between the first plate 114 and the second plate 116; the second horizontal plate 128 is connected between the first plate 114, the second plate 116, the third vertical plate 124 and the fourth vertical plate 126; the third box structure includes a fifth vertical plate 130, a sixth vertical plate 132 and a third horizontal plate 134; the fifth vertical plate 130 is connected between the second plate 116 and the second base main reinforcement 106; the sixth vertical plate 132 is connected between the second plate 116 and the second base main reinforcement 106; the third horizontal plate 134 is connected between the second plate 116, the second base main reinforcement 106, the fifth vertical plate 130 and the sixth vertical plate 132.

[0116] In this embodiment, the base body 102 further includes a first box structure, a second box structure, and a third box structure. The first box structure consists of a first vertical plate 118, a second vertical plate 120, and a first horizontal plate 122. The first vertical plate 118 and the second vertical plate 120 are both disposed between the first plate 114 and the first base main rib 104, and are parallel to each other and spaced apart. The lower ends of the first vertical plate 118 and the second vertical plate 120 are connected to the body 172, and the upper ends extend to a preset height. The first horizontal plate 122 is connected to the upper ends of the first plate 114, the first base main rib 104, the first vertical plate 118, and the second vertical plate 120, forming a closed top structure.

[0117] The second box structure consists of a third vertical plate 124, a fourth vertical plate 126, and a second horizontal plate 128. The third vertical plate 124 and the fourth vertical plate 126 are positioned between the first plate 114 and the second plate 116, distributed parallel to each other, and their lower ends are connected to the main body 172. The second horizontal plate 128 is connected to the upper ends of the first plate 114, the second plate 116, the third vertical plate 124, and the fourth vertical plate 126, forming a closed structure.

[0118] The third box structure consists of a fifth vertical plate 130, a sixth vertical plate 132, and a third horizontal plate 134. The fifth vertical plate 130 and the sixth vertical plate 132 are arranged between the second plate 116 and the second base main rib 106, and are distributed parallel to each other at intervals. Their lower ends are connected to the body 172. The third horizontal plate 134 is connected to the upper ends of the second plate 116, the second base main rib 106, the fifth vertical plate 130, and the sixth vertical plate 132, forming a closed structure.

[0119] The three enclosed box structures significantly improve the overall rigidity and torsional resistance of the base 100, enabling it to better withstand the impact of complex underground loads and avoid overall deformation. The box structure connects the dispersed main ribs and plates into an organic whole, resulting in more even load distribution, effectively dispersing concentrated loads and protecting the key stress-bearing parts of the base 100.

[0120] like Figure 11 , Figure 12 and Figure 14 As shown, in some embodiments, the base 100 further includes: a sliding shoe 136, which is a casting and has a traction hole 170; a front overpass 148, disposed at the first end of the base body 102; and a bottom edge 150, disposed at the first end of the base body 102, extending along the height direction of the base body 102 (e.g., ...). Figure 13 (In the direction indicated by the middle arrow E), the bottom edge 150 and the front overpass 148 are spaced apart, and a mounting groove 152 is formed between the front overpass 148 and the bottom edge 150, and the slipper 136 is embedded in the mounting groove 152.

[0121] In this embodiment, the base 100 further includes a slipper 136, a front overpass 148, and a bottom edge 150. The slipper 136 is a cast component, and a traction hole 170 is provided on the slipper 136. The traction hole 170 is used for pulling with a chain during the transport of the support. The front overpass 148 is located at the first end of the base body 102 and extends along the width direction of the base body 102.

[0122] The bottom edge 150 is located at the first end of the base body 102 and is spaced apart from the front overpass 148 along the height direction of the base body 102. The front overpass 148 and the bottom edge 150 form a mounting groove 152 with an opening facing the outside of the base body 102. The size of the mounting groove 152 is precisely matched with the shape of the slide shoe 136, and the slide shoe 136 is embedded in the mounting groove 152.

[0123] In related technologies, the base 100 is usually not made of cast slip shoe 136, but is made of steel plate by integral welding. A round steel is set at the front end and a local pull hole is opened below it. However, the front foot of the ultra-thin coal seam support is relatively thin, and conventional structures cannot set pull holes with sufficient strength.

[0124] In this invention, the slipper 136 adopts a cast structure, which has high strength and rigidity, and can withstand the huge tensile and compressive forces during the handling and use of the support. This solves the problem of conventional welded slippers 136 having difficulty in setting high-strength traction holes on extremely thin coal seam supports. The design of the traction hole 170 provides a convenient and stable force point for support handling, facilitating the pulling of the support via chains, improving handling efficiency, and adapting to the installation requirements of extremely thin coal seam working faces. The mounting groove 152 formed by the front overpass 148 and the bottom edge 150 serves to install the slipper 136, ensuring stable installation and preventing displacement.

[0125] like Figure 11 , Figure 12 and Figure 13 As shown, in some embodiments, the slipper 136 includes a rear end face 138 and a lower end step 140. The lower end step 140 is connected to the rear end face 138 and has an angle with the rear end face 138. The rear end face 138 is fitted with the front overpass 148, and the lower end step 140 is fitted with the bottom edge 150.

[0126] In this embodiment, the slipper 136 includes a rear end face 138 and a lower end step 140. The lower end step 140 is connected to the rear end face 138 and forms a certain angle. The rear end face 138 of the slipper 136 is in contact with the front end face of the front overpass 148, and the lower end step 140 is in contact with the upper surface of the bottom edge 150. The complete contact between the slipper 136 and the front overpass 148 and the bottom edge 150 makes the load transfer more uniform, reduces local stress concentration, and enhances the connection stability between the slipper 136 and the base body 102, preventing the slipper 136 from falling off.

[0127] In this embodiment, a wear-resistant bushing may be provided on the inner wall of the traction hole 170 of the slipper 136. The bushing is fixedly connected to the slipper 136 to reduce friction and wear between the chain and the traction hole 170 and extend the service life of the slipper 136.

[0128] In this embodiment, the front overpass 148 and the base body 102, and the bottom edge 150 and the base body 102 can be fixed by welding. The welding area covers the mating surface to ensure a stable connection. At the same time, reinforcing ribs are added to the welding area to improve the local load-bearing capacity.

[0129] In this embodiment, the rear end face 138 and the lower step 140 of the slipper 136 can be processed with anti-slip texture to enhance the tightness of the fit with the front overpass 148 and the lower edge, and prevent relative slippage.

[0130] like Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15As shown, in some embodiments, the rear end of the slipper 136 is provided with a first weight reduction groove 142 and a second weight reduction groove 144. The slipper 136 also includes a cover plate 146, which covers the first weight reduction groove 142 and the second weight reduction groove 144.

[0131] In this embodiment, the rear end of the slipper 136 is provided with a first weight reduction groove 142 and a second weight reduction groove 144. The first weight reduction groove 142 and the second weight reduction groove 144 extend along the width direction of the slipper 136 and are evenly distributed in the rear end region of the slipper 136. The depth of the groove is designed according to the thickness and strength requirements of the slipper 136.

[0132] The base 100 also includes a cover plate 146. The size of the cover plate 146 is adapted to the overall outline of the first weight reduction groove 142 and the second weight reduction groove 144. The cover plate 146 covers the opening of the first weight reduction groove 142 and the second weight reduction groove 144, and forms a smooth connection with the rear end surface of the slipper 136. The cover plate 146 and the slipper 136 are stably connected by a fixing structure.

[0133] The first weight-reducing groove 142 and the second weight-reducing groove 144 effectively reduce the overall weight of the slipper 136, optimizing the overall weight of the base 100 while ensuring the strength of the slipper 136, thus facilitating the transportation and installation of the support. The cover plate 146 is placed on the weight-reducing groove to form a closed structure, preventing debris such as gangue and dust from entering the weight-reducing groove and avoiding affecting the structural stability and performance of the slipper 136.

[0134] like Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, in some embodiments, the support column 200 is provided with a stop block 202, the stop block 202 has an arc surface, the base body 102 is provided with a column socket 160, and the base 100 further includes: a stop pin seat 154, the stop pin seat 154 is provided on the fourth base main rib 112; a first plate 156, the first plate 156 is provided on the side of the fourth base main rib 112 facing the third base main rib 110, the first plate 156 has a first through hole; and a second locking pin 162, the second locking pin 162 is sequentially passed through the stop pin seat 154 and the first through hole, and abuts against the arc surface of the stop block 202 to press the support column 200 into the column socket 160.

[0135] In this embodiment, the support column 200 is provided with a stop block 202, one side of which is an arc surface. The base body 102 is provided with a column socket 160 that is adapted to the support column 200 at the installation position of the support column 200. The support column 200 is placed in the column socket 160 to achieve initial positioning.

[0136] The base 100 includes a stop pin seat 154, a first plate 156, and a second locking pin 162. The stop pin seat 154 is fixedly mounted on the fourth base main rib 112, forming a stable connection with the fourth base main rib 112. The first plate 156 is fixedly mounted on the side of the fourth base main rib 112 facing the third base main rib 110. The first plate 156 has a through hole, the axis of which is concentric with the arc surface of the stop block 202. The second locking pin 162 is a high-strength rigid component, which passes through the preset hole in the stop pin seat 154 and the first through hole in the first plate 156. After passing through, the end of the second locking pin 162 tightly abuts against the arc surface of the stop block 202, and the abutting force firmly presses the support column 200 into the column socket 160, thereby fixing the support column 200.

[0137] This invention directly fixes the support column 200 by abutting the arc surface of the second locking pin 162 and the stop block 202, eliminating the complex structure of the traditional pin + pressure plate + pressure block, and significantly reducing the height of the base 100, thus meeting the core requirement of compact and low-profile support for ultra-thin coal seams. The arc surface of the stop block 202 is concentric with the first through hole, ensuring uniform force distribution when the second locking pin 162 abuts, avoiding localized stress concentration in the support column 200, and improving fixing reliability. The stop pin seat 154 and the first plate 156 together provide support for the second locking pin 162, enhancing the pin's load-bearing capacity, effectively resisting downhole vibration and impact loads, and preventing the support column 200 from loosening.

[0138] In this embodiment, the stop pin seat 154 can be designed as a split structure, consisting of a base 100 and a cover plate 146. The base 100 is fixedly connected to the fourth base main rib 112, and the cover plate 146 is detachably connected to the base 100 by bolts, which facilitates the installation and replacement of the second locking pin 162.

[0139] The thickness of the first plate 156 can be adjusted according to the load-bearing requirements, and the first plate 156 and the fourth base main rib 112 can be fixed by welding. The welding area covers the mating surface to enhance the connection strength. At the same time, the inner wall of the first through hole on the first plate 156 can be inlaid with a wear-resistant bushing to reduce the friction and wear between the second locking pin 162 and the through hole.

[0140] like Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, in some embodiments, the base 100 further includes a limiting member 164, which is connected to the second locking pin 162 and the stop pin seat 154 respectively.

[0141] In this embodiment, the limiting member 164 is an independent locking component, which is fixedly connected to the second locking pin 162 and the stop pin seat 154 respectively. Specifically, it can be achieved by snap-fit, threaded connection or plug-in connection, etc., directly restricting the axial movement and circumferential rotation of the second locking pin 162.

[0142] This invention, by adding a limiting component 164, further locks the position of the second locking pin 162, effectively preventing the second locking pin 162 from loosening or falling off due to complex working conditions such as downhole vibration and impact, and significantly improving the reliability and stability of the support column 200. The setting of the limiting component 164 does not change the original compact structure, and still maintains the low size of the base 100, which is suitable for extremely thin coal seam working conditions.

[0143] In this embodiment, the stop pin seat 154 has two oppositely arranged connecting holes, the axes of which are parallel and perpendicular to the insertion direction of the second locking pin 162. The limiting member 164 is specifically a U-shaped clip, with two clips passing through the two connecting holes of the stop pin seat 154 respectively. The ends of the clips are tightly engaged with the outer wall of the second locking pin 162. With the elastic clamping force of the U-shaped clip and the mechanical engagement structure, the axial movement and circumferential rotation of the second locking pin 162 are firmly restricted, ensuring that the second locking pin 162 always maintains stable contact with the arc surface of the stop block 202, further enhancing the fixing reliability of the support column 200 in the column socket 160.

[0144] like Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, in this embodiment, the fourth base main rib 112 and the third base main rib 110 have slots at the installation positions of the support column 200. A stop pin seat 154 is welded and fixed within the slot. The end face of the stop pin seat 154 is flush with the outer surfaces of the fourth base main rib 112 and the third base main rib 110, and does not protrude outwards to prevent the support from being scraped by adjacent supports during the movement of the support frame. It should be noted that the connection area between the first mounting pin 474 and the second mounting pin 478 and the base main rib is subject to greater stress; therefore, the fourth base main rib 112 and the third base main rib 110 in this area do not have the aforementioned slots.

[0145] like Figure 13 , Figure 14 , Figure 15 and Figure 16As shown, in this embodiment, there are two first plates 156. The two first plates 156 are stacked along a direction perpendicular to the fourth base main rib 112 and are fixed together to the side of the fourth base main rib 112 facing the third base main rib 110. The overall thickness of the stacked first plates 156 is increased, which not only improves the support strength and load-bearing capacity of the second locking pin 162, but also compensates for processing errors through the double-layer structure, ensuring that the axis of the first through hole is precisely concentric with the arc surface of the stop block 202, and further optimizes the fixing effect of the support column 200.

[0146] like Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, in this embodiment, the base 100 further includes a second plate 158, which is fixedly disposed on the side of the third base main rib 110 facing the fourth base main rib 112. The second plate 158 has a second through hole coaxial with the first through hole of the first plate 156. The second plate 158 and the first plate 156 are arranged opposite to each other, forming a clamping support from both sides of the third base main rib 110 and the fourth base main rib 112 respectively. The second locking pin 162 passes through the stop pin seat 154, the first through hole, and the second through hole in sequence and then abuts against the arc surface of the stop block 202. Through the cooperative limiting of the two plates, the installation stability of the second locking pin 162 is improved, the pin is prevented from shifting under force, and the fixing reliability of the support column 200 in the column socket 160 is further enhanced.

[0147] like Figure 19 and Figure 20 As shown, in some embodiments, the top beam 300 includes a top beam body 302, which includes a first beam segment 304, a second beam segment 306, and a third beam segment 308. One end of the second beam segment 306 is connected to the first beam segment 304, and the other end of the second beam segment 306 is connected to the third beam segment 308. Along the height direction of the top beam body 302 (e.g., ...) Figure 20 (In the direction indicated by the middle arrow F), the distance between the surface of the second beam segment 306 facing the support space 460 and the base 100 is greater than the distance between the surface of the first beam segment 304 facing the support space 460 and the base 100, and is also greater than the distance between the surface of the third beam segment 308 facing the support space 460 and the base 100.

[0148] In this embodiment, the top beam 300 includes a top beam body 302, which is composed of a first beam segment 304, a second beam segment 306, and a third beam segment 308, forming the main load-bearing structure of the top beam 300. One end of the second beam segment 306 is stably connected to the first beam segment 304 with a smooth transition at the connection point, and the other end is also stably connected to the third beam segment 308, forming an integrated layout. Along the height direction of the top beam body 302, the distance between the surface of the second beam segment 306 facing the support space 460 and the base 100 is greater than the distance between the surface of the first beam segment 304 facing the support space 460 and the base 100, and also greater than the distance between the surface of the third beam segment 308 facing the support space 460 and the base 100, giving the top beam body 302 a spindle-shaped structure that is low in the middle and high at both ends. The first beam segment 304 and the third beam segment 308 are symmetrically distributed with the second beam segment 306 as the center, ensuring that the top beam body 302 is subjected to balanced forces.

[0149] The low-profile design of the top beam 302 expands the effective height of the support space by 460°, providing ample space for workers to operate and for equipment to be arranged in the low environment of the extremely thin coal seam, solving the problem of limited space in traditional top beams 300. The high-profile structure at both ends allows the first beam segment 304 and the third beam segment 308 to better conform to the undulating shape of the roof, ensuring a larger contact area between the top beam 302 and the roof, resulting in more stable support. The three-section structure enhances the overall bending and torsional resistance of the top beam 302, effectively dispersing concentrated loads transmitted from the roof and preventing damage due to excessive local stress. The spindle-shaped structure is precisely matched with the distributed layout of at least four support columns 200, making load distribution more even and further improving the overall support stability of the support system.

[0150] Optionally, the connection between the first beam segment 304 and the second beam segment 306, and between the second beam segment 306 and the third beam segment 308, is fixed by welding. Reinforcing ribs are added to the welding area to improve the connection strength and integrity, and to ensure the integrated load-bearing effect of the top beam 302.

[0151] Optionally, the upper surface of the top beam 302 is processed with anti-slip texture to enhance the friction between the top beam 302 and the top plate, prevent relative sliding between the top beam 302 and the top plate, and ensure the reliability of the support.

[0152] like Figure 19 and Figure 20 As shown, in some embodiments of the present invention, optionally, the second beam segment 306 includes: a first plate; a second plate disposed opposite to the first plate; and a plurality of intermediate plates stacked between the first plate and the second plate.

[0153] In this embodiment, the second beam segment 306 includes a first plate, a second plate, and multiple intermediate plates. The first plate and the second plate are arranged in parallel relative to each other, and they respectively constitute the upper and lower surfaces of the second beam segment 306. The multiple intermediate plates are stacked between the first plate and the second plate, together forming a multi-layer load-bearing structure of the second beam segment 306, ensuring coordinated operation under stress.

[0154] The layered structure enhances the load-bearing strength and torsional deformation resistance of the second beam segment 306, effectively bearing the vertical load and lateral force transmitted from the roof, and meeting the support requirements of complex working conditions in extremely thin coal seams. The multi-plate design of the second beam segment 306 in this invention avoids a complete box shape, reasonably reducing the overall weight of the second beam segment 306 while ensuring strength, and preventing the roof beam 300 from becoming too thick and heavy, thus increasing the load on the support.

[0155] Optionally, the intermediate board can be made of alternating layers of boards of the same or different thicknesses.

[0156] Optionally, the intermediate plate is fixed to the first and second plates by welding. Full welding process is used to ensure a stable connection. At the same time, reinforcing ribs are added at the welding joints to improve the load-bearing capacity of the joints.

[0157] Optionally, weight-reducing holes are machined on the intermediate plate, and the weight-reducing holes are evenly distributed along the intermediate plate to further optimize the weight of the second beam segment 306.

[0158] Optionally, the number of intermediate plates can be adjusted, and the number of stacked layers can be increased or decreased according to actual needs to adapt to different load conditions.

[0159] In this embodiment, the second beam segment 306 includes a first plate, a second plate, and three intermediate plates. The first plate and the second plate are arranged in parallel relative to each other, forming the upper and lower surfaces of the second beam segment 306, respectively. The three intermediate plates are stacked between the first plate and the second plate, together forming a five-layer steel plate superimposed and welded structure of the second beam segment 306, ensuring coordinated operation under stress.

[0160] The stacked structure of five layers of steel plates welded together significantly improves the load-bearing strength and torsional deformation resistance of the second beam segment 306, effectively bearing the vertical load and lateral force transmitted from the roof, and meeting the support requirements of complex working conditions in extremely thin coal seams.

[0161] In some embodiments of the present invention, optionally, a first connecting structure is provided at one end of the first beam segment 304 away from the second beam segment 306, and the first connecting structure is provided with a first hinge hole; a second connecting structure is provided at one end of the third beam segment 308 away from the second beam segment 306, and the second connecting structure is provided with a second hinge hole.

[0162] In this embodiment, a first connecting structure is provided at the end of the first beam segment 304 opposite to the second beam segment 306. The first connecting structure is provided with a first bent plate 316 and a top plate 318, forming a closed box or semi-box structure. A through-hole is machined on the first connecting structure for hinged connection with adjacent components. A second connecting structure is provided at the end of the third beam segment 308 opposite to the second beam segment 306. The second connecting structure is provided with a second bent plate 320, also forming a box or semi-box structure, with a structural form adapted to the first connecting structure. A through-hole is machined on the second connecting structure, the size of which precisely matches the first hinge hole, ensuring the versatility of the hinged components and enabling hinged connection with corresponding adjacent components.

[0163] This invention enhances the structural strength and rigidity of the connection points through a first connection structure and a second connection structure, preventing deformation or damage to the beam segment ends due to stress on the hinge. The first connection structure is composed of a first bent plate 316 and a top plate 318, forming a closed box or semi-box structure. The second connection structure is composed of a second bent plate 320, also forming a box or semi-box structure. The closed or semi-closed box structure allows for more even load transfer, disperses concentrated stress at the hinge, improves the fatigue strength of the connection points, and extends service life.

[0164] like Figure 19 and Figure 20 As shown, in some embodiments, the top beam 300 further includes: a first welding plate 322 disposed on the side of the top beam body 302 facing the support space 460; an ear seat 324 disposed on the first welding plate 322; a second hydraulic drive device 330, one end of which is hinged to the ear plate; and a second side guard plate 332 disposed on at least one side of the top beam body 302, the other end of which is connected to the second side guard plate 332.

[0165] In this embodiment, the top beam 300 further includes a first welding plate 322, an ear seat 324, a second hydraulic drive device 330, and a second side guard plate 332. The first welding plate 322 is fixedly disposed on the side of the top beam body 302 facing the support space 460, serving as the mounting base for the ear seat 324. The ear seat 324 is disposed on the first welding plate 322, specifically including a second welding plate 326 and a third welding plate 328. The second welding plate 326 forms a stable connection with the first welding plate 322 and extends in a direction perpendicular to the first welding plate 322. The third welding plate 328 is fixedly disposed on the upper end of the second welding plate 326, and the two together constitute a structurally stable ear seat 324. Because the middle part of the top beam 302 is a multi-layer welded steel plate structure, the second hydraulic drive device 330 cannot be internally installed. Therefore, an external installation method is adopted. The second hydraulic drive device 330 is entirely externally mounted on the top beam 302. One end is hinged to the second welded plate 326 of the lug 324 via a hinge pin, ensuring that the second hydraulic drive device 330 can rotate flexibly. The other end is stably connected to the second side guard plate 332. The second side guard plate 332 is located on at least one side of the top beam 302 and forms a slidable fit with the top beam 302, allowing it to move laterally along the width direction of the top beam 302.

[0166] This invention addresses the problem that the multi-layered welded steel plate structure in the middle of the top beam 302 cannot accommodate an internal drive device. By setting an ear-shaped support 324 containing a second welded plate 326 and a third welded plate 328 on the first welded plate 322, the second hydraulic drive device 330 is externally mounted. This solves the installation difficulties caused by structural limitations and ensures the connection stability of the drive device through the coordinated support of the double-layered welded plates. The external layout of the second hydraulic drive device 330 does not occupy the internal space of the top beam 302 and avoids damage to the multi-layered welded structure of the top beam 302, thus ensuring the overall strength of the top beam 300. The second hydraulic drive device 330 drives the second side guard plate 332 to move, quickly filling the gap between the top beam 300 and adjacent supports, effectively preventing the falling of top rock and improving the safety of the support space 460. The ear seat 324 is connected to the first welding plate 322 through the second welding plate 326. With the reinforcement of the third welding plate 328, the structure is stable and has a strong load-bearing capacity. It can provide a reliable installation foundation for the second hydraulic drive device 330, ensuring accurate and efficient power transmission and adapting to the space requirements of ultra-thin coal seam low working conditions.

[0167] In some embodiments of the present invention, the hydraulic support 10 may optionally include a front beam 500, the front beam 500 including a first front beam body 502 and a second front beam body 504 disposed along the width direction of the hydraulic support 10, the first front beam body 502 and the second front beam body 504 being hinged to the front end of the top beam 300 respectively.

[0168] In this embodiment, the hydraulic support 10 also includes a front beam 500, which is composed of a first front beam body 502 and a second front beam body 504. Both the first front beam body 502 and the second front beam body 504 are rigid load-bearing components and are arranged along the width direction of the hydraulic support 10. The first front beam body 502 and the second front beam body 504 are independent of each other, forming two separate structural plates with independent left and right parts. One end of the first front beam body 502 is hinged to the front end of the top beam 300 through a hinge pin, ensuring that the first front beam body 502 can swing flexibly around the hinge point. One end of the second front beam body 504 is also hinged to the front end of the top beam 300 through a hinge pin, and the swing direction is the same as that of the first front beam body 502. The two can independently achieve posture adjustment.

[0169] This invention divides the front beam 500 into two independent parts, left and right, which effectively improves the flexibility of the swing support. The first front beam 502 and the second front beam 504 can independently adjust their swing angles according to the local undulations of the roof slab, significantly improving the fit between the front beam 500 and the roof slab, reducing blind spots in the support, and achieving effective management of the roof slab. The independent force distribution of the first front beam 502 and the second front beam 504 disperses the concentrated load transmitted from the roof slab, reduces the stress on individual front beams, and improves the overall load-bearing capacity and service life of the front beam 500.

[0170] Optionally, a first front beam body 502 is provided with a first front beam body side guard plate on the side opposite to the second front beam body 504, and a second front beam body 504 is provided with a second front beam body side guard plate on the side opposite to the first front beam body 502. The independent swing design of the first front beam body 502 and the second front beam body 504, in conjunction with their respective side guard plates, enhances the adaptability of the front beam 500 to irregular roofs and enables it to cope with complex working conditions of fluctuating roofs in extremely thin coal seams.

[0171] Optionally, independent hydraulic drive devices are respectively installed on the first front beam 502 and the second front beam 504. The swing angle of each front beam is precisely controlled by the drive devices to further improve the support accuracy and roof management effect.

[0172] Optionally, anti-slip protrusions can be welded to the upper surfaces of the first front beam 502 and the second front beam 504 to enhance friction with the top plate and prevent relative sliding. The equipped first front beam side guards and second front beam side guards can adopt a telescopic structure to improve the flexibility of gap filling.

[0173] Optionally, a lubrication device can be installed at the hinge joint between the front beam and the top beam 300 to reduce friction and wear. Optionally, the first front beam 502 and the second front beam 504 may adopt a welded reinforced structure, with internal reinforcing ribs added to improve bending and impact resistance.

[0174] Optionally, the lengths of the first front beam 502 and the second front beam 504 can be adjusted according to the working face width requirements, while optimizing the interval between them to adapt to different working conditions.

[0175] Optionally, the first front beam 502 and the second front beam 504 have the same structure and are symmetrically distributed along the centerline of the front beam 500, reducing the difficulty of processing.

[0176] In some embodiments, the present invention provides a hydraulic support 10. The present invention achieves a balance between compact structure and convenient operation by using a shield beam 402 with six main ribs and a coverless U-shaped semi-box body, and embedding a first hydraulic drive device 470 inside the semi-box body.

[0177] By optimizing the side guard plate mechanism of the shield beam 400, the preload spring 492 acts directly between the shield beam body 402 and the side guard plate outside the spring guide rod 491, eliminating the need for an external spring sleeve 490 and significantly reducing space requirements. By employing an I-shaped front connecting rod 464 composed of main ribs on both sides and a middle stiffening plate, and an integral rear connecting rod 476, a compact overall structure is achieved while ensuring strength.

[0178] By adopting a cast slipper 136 and eliminating the pressure plate, a large-diameter locking pin is used to directly press the stop block 202 and cooperate with the built-in stop pin seat 154, the strength of the front end of the base 100 is enhanced and the height of the base 100 is effectively reduced.

[0179] By designing the top beam 302 as a spindle shape and employing a multi-layered steel plate welded structure in its middle, pedestrian space is maximized while ensuring strength. The side-pushing mechanism adopts an external connection method. The use of left and right split double front beams 500 significantly improves adaptability to roof undulations and support flexibility.

[0180] In the claims, description, and accompanying drawings of this invention, the term "plural" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the descriptive process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limiting the invention. The terms "connected," "installed," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood based on the specific circumstances described above.

[0181] In the claims, description, and accompanying drawings of this invention, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In the claims, description, and accompanying drawings of this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0182] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydraulic support, characterized in that, include: Base; At least four support columns are disposed on the base, a portion of the at least four support columns are located at one end of the base, and another portion of the at least four support columns are located at the other end of the base; The top beam is connected to the other end of at least four of the supporting columns; The protective beam includes a protective beam body, a first side guard plate, and a first hydraulic drive device. The protective beam body is connected to the base and the top beam respectively. The base, the top beam, and the protective beam body enclose a support space. The first side guard plate is disposed on one side of the shield beam; The shield beam has a groove with the opening of the groove facing the support space. The first hydraulic drive device is disposed on the shield beam and located in the groove. The first hydraulic drive device is connected to the first side guard plate and is used to drive the first side guard plate to move relative to the shield beam.

2. The hydraulic support according to claim 1, characterized in that, The protective beam includes: A base plate, which is connected to the top beam, includes a mounting surface facing the support space, and the first hydraulic drive device is disposed on the mounting surface of the base plate; The first main rib is provided on the mounting surface of the base plate; The second main reinforcement is provided on the mounting surface of the base plate, and the second main reinforcement and the first main reinforcement are arranged at intervals along the width direction of the base plate. The first stiffening plate is disposed on the mounting surface of the base plate, located between the first main stiffening plate and the second main stiffening plate. One end of the first stiffening plate is connected to the first main stiffening plate, and the other end of the first stiffening plate is connected to the second main stiffening plate. A rear plate assembly is disposed on the mounting surface of the base plate. The rear plate assembly and the first stiffening plate are arranged at intervals along the length direction of the base plate. The rear plate assembly is connected to the first main stiffening plate and the second main stiffening plate, respectively. The base plate, the first main rib, the second main rib, the first rib plate, and the rear plate assembly together form the groove.

3. The hydraulic support according to claim 2, characterized in that, The rear panel assembly includes: The second stiffener is disposed opposite to the first stiffener. The third stiffener is connected to one end of the second stiffener, and the third stiffener extends along the length of the bottom plate. There is a gap between the third stiffener and the first main stiffener. The fourth stiffener is connected to the end of the third stiffener away from the second stiffener, the fourth stiffener extends along the width direction of the bottom plate, and the fourth stiffener is connected to the first main stiffener; The fifth stiffener is connected to the other end of the second stiffener, and the fifth stiffener extends along the length of the bottom plate, with a gap between the fifth stiffener and the second main stiffener; The sixth rib is connected to the end of the fifth rib that is away from the second rib. The sixth rib extends along the width direction of the bottom plate and is connected to the first main rib. Along the length of the base plate, the second stiffener is closer to the first stiffener than the fourth and fifth stiffeners.

4. The hydraulic support according to claim 3, characterized in that, The protective beam also includes: The third, fourth, fifth, and sixth main reinforcement bars are provided on the base plate and extend along the length of the base plate. Along the width direction of the base plate, the third main reinforcement, the fourth main reinforcement, the first main reinforcement, the second main reinforcement, the fifth main reinforcement and the sixth main reinforcement are arranged in sequence, and there are gaps between them; The seventh rib plate is disposed on the base plate and extends along the width direction of the base plate. The seventh rib plate is connected to one side of the fourth main rib, one end of the first main rib, one end of the second main rib, and one side of the fifth main rib. The eighth stiffener is connected to one end of the rear plate assembly that faces away from the mounting surface of the bottom plate. The ninth rib is disposed between the fourth main rib and the first main rib, one end of the ninth rib is connected to the fourth main rib, the other end of the ninth rib is connected to the first main rib, and the ninth rib extends along the length direction of the bottom plate. The tenth rib is disposed between the fifth main rib and the second main rib. One end of the tenth rib is connected to the fifth main rib, and the other end of the tenth rib is connected to the second main rib. The tenth rib extends along the length direction of the base plate.

5. The hydraulic support according to claim 4, characterized in that, The protective beam also includes a first link, the first link comprising: Two link segments, which extend along the length of the first link and are spaced apart from each other; Multiple connecting segments are connected between two connecting rod segments, and the multiple connecting segments and the two connecting rod segments constitute a box structure; A portion of one of the two connecting rod segments is disposed between the third main reinforcement and the fourth main reinforcement, and a portion of the other connecting rod segment is disposed between the fourth main reinforcement and the first main reinforcement; The protective beam also includes: The first mounting pin passes through the third main reinforcement, one of the connecting rod segments, the fourth main reinforcement, another connecting rod segment, and the first main reinforcement, so that the first connecting rod is hinged to the shield beam. The second link is a single-piece link; The second connecting rod is partially disposed between the third main rib and the fourth main rib, and along the length direction of the base plate, the second connecting rod is farther away from the first hydraulic drive device than the first connecting rod; The second mounting pin passes through the third main reinforcement, the fourth main reinforcement, and the second connecting rod, so that the second connecting rod is hinged to the shield beam.

6. The hydraulic support according to claim 5, characterized in that, The protective beam also includes: The eleventh stiffening plate is disposed on the bottom plate, located between the third main reinforcement and the fourth main reinforcement, and the eleventh stiffening plate is connected to the third main reinforcement and the fourth main reinforcement respectively; The twelfth stiffener plate is disposed on the bottom plate, located between the third main stiffener and the fourth main stiffener, and the twelfth stiffener plate is connected to the third main stiffener and the fourth main stiffener respectively. Along the length direction of the bottom plate, there is a gap between the eleventh stiffener plate and the twelfth stiffener plate. The thirteenth stiffener is disposed between the third main stiffener and the fourth main stiffener. The thirteenth stiffener is connected to the third main stiffener and the fourth main stiffener respectively. Furthermore, the thirteenth stiffener is connected to the end of the eleventh stiffener and the twelfth stiffener away from the bottom plate respectively.

7. The hydraulic support according to claim 4, characterized in that, The protective beam also includes: A side push rod extends along the width direction of the base plate. One end of the side push rod is hinged to the first hydraulic drive device via a first connecting pin, and the other end of the side push rod is hinged to the first side guard plate via a second connecting pin.

8. The hydraulic support according to claim 4, characterized in that, The protective beam further includes a first pre-tensioning assembly, the first pre-tensioning assembly comprising: A spring limiting plate is disposed on the side of the fourth main rib that is away from the third main rib; A sleeve is disposed between the spring limiting plate and the first main rib; A spring guide rod is disposed inside the sleeve and passes through the fourth main rib and the third main rib. One end of the spring guide rod is connected to the first side guard plate. A preload spring is sleeved on the outside of the spring guide rod; One end of the pre-tension spring abuts against the spring limiting plate, and the other end abuts against the first side guard plate.

9. The hydraulic support according to any one of claims 1 to 8, characterized in that, The base includes: The base body includes a main body and a first base main rib, a second base main rib, a third base main rib and a fourth base main rib, which are arranged sequentially on the main body along the width direction of the main body and spaced apart from each other. The first plate is disposed on the main body and located between the first base main reinforcement and the second base main reinforcement; The second plate is disposed on the main body and located between the first plate and the second base main rib.

10. The hydraulic support according to claim 9, characterized in that, The base also includes: The sliding shoe is a casting and has traction holes. A front overpass is located at the first end of the base body; The bottom edge is located at the first end of the base body. Along the height direction of the base body, the bottom edge is spaced apart from the front overpass. A mounting groove is formed between the front overpass and the bottom edge, and the slipper is embedded in the mounting groove.

11. The hydraulic support according to claim 9, characterized in that, The support column is provided with a stop block, the stop block having an arc surface; the base body is provided with a column recess; the base also includes: A stop pin seat is provided on the fourth base main rib; The first plate is disposed on the side of the fourth base main rib facing the third base main rib, and the first plate has a first through hole. The second locking pin passes through the stop pin seat and the first through hole in sequence, and abuts against the arc surface of the stop block to press the support column into the column socket.

12. The hydraulic support according to claim 11, characterized in that, The base also includes: The limiting component is connected to the second locking pin and the stop pin seat respectively.

13. The hydraulic support according to any one of claims 1 to 8, characterized in that, The top beam includes a top beam body, which includes a first beam segment, a second beam segment, and a third beam segment. One end of the second beam segment is connected to the first beam segment, and the other end of the second beam segment is connected to the third beam segment. Along the height direction of the top beam, the distance between the surface of the second beam segment facing the support space and the base is greater than the distance between the surface of the first beam segment facing the support space and the base, and is also greater than the distance between the surface of the third beam segment facing the support space and the base.

14. The hydraulic support according to claim 13, characterized in that, The top beam also includes: The first welding plate is disposed on the side of the top beam facing the support space; Ear seat, the ear seat is disposed on the first welding plate; A second hydraulic drive device, one end of which is hinged to the ear plate; The second side guard plate is disposed on at least one side of the top beam, and the other end of the second hydraulic drive device is connected to the second side guard plate.

15. The hydraulic support according to any one of claims 1 to 8, characterized in that, The hydraulic support also includes: The front beam includes a first front beam body and a second front beam body arranged along the width direction of the hydraulic support, and the first front beam body and the second front beam body are respectively hinged to the front end of the top beam.

Images