A locking structure of a hydraulic support stand column pressing plate and a hydraulic support

Abstract

The application provides a locking structure of a hydraulic support column pressing plate and a hydraulic support, and belongs to the technical field of hydraulic supports. The locking structure comprises a column pressing plate, a pin shaft and a snap spring assembly. The rod end of the pin shaft penetrates the connecting hole of the column main rib and the through hole of the column pressing plate in sequence, is connected with the snap spring assembly, the head end of the pin shaft is connected with the column main rib, and the snap spring assembly is connected with the column pressing plate. The coordinated structure of the column pressing plate, the pin shaft and the snap spring assembly is set, the head end of the pin shaft is connected with the column main rib, the rod end penetrates the connecting hole of the column main rib and the through hole of the column pressing plate, and is then connected with the snap spring assembly. Meanwhile, the snap spring assembly is connected with the column pressing plate, a "two-way limiting bearing" structure is formed, the traditional single D-shaped card or open pin limiting is replaced, the axial force generated by the repeated lifting of the column can be shared by the pin shaft and the snap spring assembly, and the axial force is prevented from being concentrated on the easily-broken D-shaped card or open pin.

Description

Technical Field

[0001] This application belongs to the field of hydraulic support technology, and particularly relates to a locking structure for a hydraulic support column pressure plate and a hydraulic support. Background Technology

[0002] In underground coal mining operations, hydraulic supports are core equipment for ensuring roof stability and mining safety. The reliability of the locking of the column pressure plate directly determines the overall support performance of the support. Currently, the mainstream locking methods for hydraulic support column pressure plates in the industry generally rely on a combination structure of "pin shaft + D-shaped clip" or "pin shaft + washer + cotter pin". Although this type of structure has the characteristics of simple assembly and low initial cost, and can meet the basic locking requirements of gently inclined working faces, its structural defects will be fully exposed in steeply inclined coal mining faces (such as mining scenarios with an inclination angle exceeding 15°).

[0003] When operating in a steeply inclined working face, the hydraulic supports need to be arranged along the inclined direction. The columns need to repeatedly extend and retract to adapt to the undulations of the roof and maintain support. During this process, the columns exert a continuous axial force on the pressure plate, which is ultimately transmitted to the D-clamps or cotter pins. Because the D-clamps and cotter pins are mostly made of thin steel plates and have low tensile strength and poor fatigue resistance, they cannot withstand the periodic axial load caused by the repeated raising and lowering of the columns, and are prone to fracture due to stress concentration. Once the D-clamps or cotter pins break, they will directly lose their limiting function on the pin shaft, causing the pin shaft to fall out of the hole between the main rib of the column and the pressure plate, which in turn leads to the failure of the pressure plate locking. After the pressure plate locking fails, the column loses its effective limiting function and is prone to falling out of the column socket. This will not only lead to the paralysis of the hydraulic support function, but may also cause serious safety accidents such as roof collapse and equipment damage, posing a major threat to the safety of downhole operations. Utility Model Content

[0004] This application provides a locking structure for a hydraulic support column pressure plate and a hydraulic support. Through the coordinated cooperation of the column pressure plate, pin, and snap ring assembly, a locking structure with multiple components sharing axial force and double limiting is formed. This can prevent component breakage and pin detachment, ensuring stable locking of the column pressure plate under large tilt angle conditions. It solves the problem that existing hydraulic support column pressure plates rely on "pin + D-shaped clip / cotter pin" for locking. Under the axial force generated by repeated lifting and lowering of the column on a large tilt angle working surface, the D-shaped clip or cotter pin is prone to breakage, leading to pin detachment and column locking failure.

[0005] In a first aspect, embodiments of this application provide a locking structure for a hydraulic support column pressure plate, including a column pressure plate, a pin, and a snap ring assembly; The column pressure plate is provided with through holes; The pin has a head end and a rod end, and the rod end of the pin passes through the connecting hole of the main rib of the column and the through hole of the column pressure plate in sequence, and is connected to the snap ring assembly. The head end of the pin is engaged with the main rib of the column, and the snap ring assembly is engaged with the column pressure plate.

[0006] In one feasible implementation, the snap ring assembly includes a pressure ring; The pressure ring is sleeved on the outer circumferential surface of the rod end of the pin and abuts against the column pressure plate.

[0007] In one feasible implementation, the pressure ring is composed of two symmetrically arranged semicircular pressure rings, which are spliced ​​together to form an annular structure, and the annular structure is sleeved on the outer circumferential surface of the rod end of the pin.

[0008] In one feasible implementation, an annular positioning groove is provided on the outer peripheral surface of the rod end of the pin. The inner wall of the pressure ring is provided with a positioning protrusion at one end near the column pressure plate, and the positioning protrusion is engaged in the annular positioning groove.

[0009] In one feasible implementation, the snap ring assembly further includes a retaining ring; The retaining ring is sleeved on the outer circumferential surface of the pressure ring.

[0010] In one feasible implementation, the retaining ring assembly further includes an elastic retaining ring; The elastic retaining ring is sleeved on the outer circumferential surface of the pressure ring and abuts against the retaining ring.

[0011] In one feasible implementation, the outer circumferential surface of the pressure ring is provided with an annular retaining spring groove, and the elastic retaining spring is embedded in the annular retaining spring groove.

[0012] In one feasible implementation, the elastic retaining ring has an annular opening structure, and both ends of the elastic retaining ring are provided with extension lugs, and the extension lugs are provided with operating holes.

[0013] In one feasible implementation, the head end of the pin is provided with an annular limiting step on the side near the rod end, and the annular limiting step abuts against the side of the main reinforcement bar of the column that is close to itself. The end of the pin shaft is provided with a guide cone surface.

[0014] Secondly, embodiments of this application also provide a hydraulic support, including the locking structure of the hydraulic support column pressure plate described above.

[0015] This application provides a locking structure for a hydraulic support column pressure plate and a hydraulic support. By setting a cooperative structure of column pressure plate, pin and snap ring assembly, the head end of the pin is engaged with the main rib of the column, and the rod end passes through the connection hole of the main rib of the column and the through hole of the column pressure plate and is connected to the snap ring assembly. At the same time, the snap ring assembly is engaged with the column pressure plate to form a "two-way limiting bearing" structure, which replaces the traditional single D-shaped clip or cotter pin limiting. The axial force generated by repeated lifting and lowering of the column can be shared by the pin and the snap ring assembly, avoiding the axial force from being concentrated on the easily broken D-shaped clip or cotter pin, and solving the problem of insufficient axial force resistance of traditional structures. Meanwhile, through the double clamping constraint of the pin and the snap ring assembly, the head end of the pin restricts the displacement of the main rib side of the column, and the snap ring assembly restricts the displacement of the pressure plate side of the column. Even under vibration and impact conditions on the large-angle working surface, it can effectively prevent the pin from coming out of the main rib connection hole of the column and the through hole of the pressure plate of the column, avoiding the risk of the pin falling off and the column locking failure after the D-shaped clip or cotter pin breaks in the traditional structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the locking structure of a hydraulic support column pressure plate provided in this application; Figure 2 This is a side sectional view of the locking structure; Figure 3 This is a structural diagram of the pin; Figure 4 This is a schematic diagram of the semi-circular pressure ring; Figure 5 This is a schematic diagram of the retaining ring structure; Figure 6 This is a schematic diagram of the structure of a spring clip; Figure 7 This is a structural schematic diagram of a hydraulic support provided in this application.

[0017] Explanation of reference numerals in the attached figures: 100 - Column pressure plate; 200 - Pin; 300 - Snap ring assembly; 110 - Through hole; 210 - Head end of pin; 220 - Shaft end of pin; 310 - Pressure ring; 320 - Retaining ring; 330 - Elastic retaining ring; 221-Annular positioning groove; 222-Guide cone surface; 311-Semi-circular pressure ring; 312-Positioning protrusion; 313-Annular snap ring groove; 331-Extension lug; 332-Operating hole. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0019] Currently, existing hydraulic support column pressure plates rely on a locking structure using pins and D-shaped clips or shims with cotter pins. Under the axial force generated by the repeated lifting and lowering of the column in a steep working face, the D-shaped clips / cotter pins are prone to breakage and detachment, and the pins may fall off, leading to column locking failure and posing a safety hazard in coal mining, such as the column jumping out of its socket. The locking structure of the hydraulic support column pressure plate and the hydraulic support provided in this application, through the coordinated cooperation of the column pressure plate, pin, and snap ring assembly (including pressure rings, retaining rings, and elastic snap rings), and the optimization of component materials and structure, can effectively withstand the axial force of a steep working face, resist the harsh underground environment, simplify disassembly and maintenance, avoid column locking failure and the risk of jumping out of the socket, and improve the operational reliability of the hydraulic support and the safety of coal mining.

[0020] The locking structure of the hydraulic support column pressure plate and the specific structure of the hydraulic support provided in this application are described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-6 As shown, this application embodiment provides a locking structure for a hydraulic support column pressure plate, including a column pressure plate 100, a pin 200, and a snap ring assembly 300; The column pressure plate 100 is provided with a through hole 110; The pin 200 has a head end 210 and a rod end 220. The rod end 220 of the pin 200 passes through the connecting hole of the main rib of the column and the through hole 110 of the column pressure plate 100 in sequence, and is connected to the snap ring assembly 300. The head end 210 of the pin 200 is engaged with the main rib of the column, and the snap ring assembly 300 is engaged with the column pressure plate 100.

[0022] The locking structure of the hydraulic support column pressure plate includes the column pressure plate 100, the pin 200, and the snap ring assembly 300.

[0023] The column pressure plate 100 is provided with a through hole 110, which can be a circular through hole. Its diameter forms a transition fit with the outer diameter of the rod end 220 of the pin 200, which not only ensures that the pin 200 passes through smoothly, but also avoids radial shaking caused by excessive gap between the two, thus ensuring the limiting and guiding function of the column pressure plate 100 on the pin 200.

[0024] The pin 200 has a head end 210 and a rod end 220. The rod end 220 of the pin 200 passes through the connecting hole of the main rib of the column and the through hole 110 of the column pressure plate 100 in sequence, and is connected to the snap ring assembly 300. The pin 200 can be made of high-strength alloy material. The head end 210 is a circular platform structure with a diameter larger than that of the rod end 220. The rod end 220 is a cylindrical structure with a rust-proof surface. During the penetration process, it is necessary to ensure that the main rib of the column and the column pressure plate 100 are tightly fitted. The initial positioning of the two is achieved by the insertion of the pin 200.

[0025] The head end 210 of the pin 200 is engaged with the main rib of the column, and the snap ring assembly 300 is engaged with the column pressure plate 100. The platform-shaped structure of the head end 210 can directly abut against the outside of the main rib of the column, restricting the axial displacement of the pin 200 towards the main rib of the column. The snap ring assembly 300 locks the pin 200 from the outside of the column pressure plate 100, forming a bidirectional limit to prevent the pin 200 from moving axially.

[0026] Through the coordinated structure of the column pressure plate 100, pin 200 and snap ring assembly 300, the head end 210 of the pin 200 is engaged with the main rib of the column, and the rod end 220 passes through the connection hole of the main rib of the column and the through hole 110 of the column pressure plate 100 and is then connected to the snap ring assembly 300. At the same time, the snap ring assembly 300 is engaged with the column pressure plate 100, forming a "two-way limiting bearing" structure, which replaces the traditional single D-shaped clip or cotter pin limiting. The axial force generated by the repeated lifting and lowering of the column can be shared by the pin and the snap ring assembly, avoiding the axial force from being concentrated on the easily broken D-shaped clip or cotter pin, and solving the problem of insufficient axial force resistance of the traditional structure. Meanwhile, through the double clamping constraint of the pin 200 and the snap ring assembly 300, the head end 210 of the pin 200 restricts the displacement of the main rib side of the column, and the snap ring assembly 300 restricts the displacement of the column pressure plate 100 side. Even under the vibration and impact conditions of the large-angle working surface, it can effectively prevent the pin 200 from coming out of the main rib connection hole of the column and the through hole 110 of the column pressure plate 100, avoiding the risk of the pin falling off and the column locking failure after the D-shaped clip or cotter pin breaks in the traditional structure.

[0027] Reference Figure 2 As shown, in some embodiments, the snap ring assembly 300 includes a pressure ring 310; The pressure ring 310 is sleeved on the outer circumferential surface of the rod end 220 of the pin 200 and abuts against the column pressure plate 100.

[0028] The snap ring assembly 300 includes a pressure ring 310, which is made of a rust-resistant, high-strength alloy material. It is suitable for the harsh working conditions of damp and dusty underground coal mines and can avoid failure due to rust after long-term use.

[0029] The snap ring assembly 300 includes a pressure ring 310, which is a ring structure and can be made of rust-resistant, high-strength alloy material. Its structural strength is adapted to the axial force bearing requirements of the large-angle working face. The surface is treated with wear resistance to resist the corrosion of the humid and dusty environment downhole and extend its service life.

[0030] The pressure ring 310 is sleeved on the outer circumferential surface of the rod end 220 of the pin 200 and abuts against the column pressure plate 100. The inner diameter of the pressure ring 310 matches the outer circumferential diameter of the rod end 220 of the pin 200. After being sleeved, it fits tightly without loosening and fully abuts against the end face of the column pressure plate 100. This can evenly distribute the axial force on the column pressure plate 100 to the pressure ring 310, avoiding deformation and damage caused by localized force concentration on the column pressure plate 100.

[0031] Reference Figures 2-4 As shown, in some embodiments, the pressure ring 310 is composed of two symmetrically arranged semi-circular pressure rings 311. The two semi-circular pressure rings 311 are spliced ​​together to form an annular structure, which is sleeved on the outer circumferential surface of the rod end 220 of the pin 200.

[0032] The pressure ring 310 is composed of two symmetrically arranged semi-circular pressure rings 311. The two semi-circular pressure rings 311 have completely identical structures and form a complete ring structure after splicing. The inner circle arc of the ring structure is completely matched with the outer circle arc of the rod end 220 of the pin 200. There is no obvious gap after splicing, ensuring a tight fit with the outer circumferential surface of the rod end 220 without radial gap.

[0033] The ring structure is fitted onto the outer circumferential surface of the rod end 220 of the pin 200. During assembly, there is no need to disassemble other parts. The two semi-circular pressure rings 311 can be directly inserted into the designated positions from the side of the rod end 220 of the pin 200. After splicing, a complete ring pressure ring 310 is formed. During disassembly, only the two semi-circular pressure rings 311 need to be separated to remove the ring. The operation is convenient and efficient.

[0034] Furthermore, in some embodiments, an annular positioning groove 221 is provided on the outer peripheral surface of the rod end 220 of the pin 200; The inner wall of the pressure ring 310 is provided with a positioning protrusion 312 at one end near the column pressure plate 100. The positioning protrusion 312 is engaged in the annular positioning groove 221.

[0035] An annular positioning groove 221 is provided on the outer circumferential surface of the rod end 220 of the pin 200. The annular positioning groove 221 is a groove structure opened circumferentially along the outer circumferential surface of the rod end 220. Its width and depth are perfectly matched with the size of the positioning protrusion 312 of the pressure ring 310, ensuring that the two can achieve precise engagement without relative sliding space.

[0036] The inner wall of the pressure ring 310 is provided with a positioning protrusion 312 at one end near the column pressure plate 100. The positioning protrusion 312 is an annular protrusion arranged circumferentially along the inner wall of the pressure ring 310. The positioning protrusion 312 is engaged in the annular positioning groove 221. After engagement, the side of the positioning protrusion 312 is tightly fitted with the groove wall of the annular positioning groove 221, which can effectively limit the displacement of the pressure ring 310 along the axial direction of the pin shaft 200 and prevent the pressure ring 310 from shifting due to downhole vibration or axial force.

[0037] By adding a precise snap-fit ​​structure between the annular positioning groove 221 and the positioning protrusion 312, the axial positioning and locking of the pressure ring 310 and the pin 200 are achieved; the axial movement of the pressure ring 310 is effectively prevented, and the connection stability between the pressure ring 310 and the pin 200 is further enhanced.

[0038] Reference Figures 2-5 As shown, in some embodiments, the snap ring assembly 300 further includes a retaining ring 320; The retaining ring 320 is fitted onto the outer circumferential surface of the pressure ring 310.

[0039] The retaining ring assembly 300 also includes a retaining ring 320, which is an annular structure and can be made of the same rust-resistant, high-strength alloy material as the pressure ring 310, to ensure that its structural strength and weather resistance are compatible with the pressure ring 310. The inner diameter of the retaining ring 320 is precisely matched with the outer circumferential diameter of the pressure ring 310 to form an interference fit.

[0040] The retaining ring 320 is fitted onto the outer circumferential surface of the pressure ring 310. During fitting, the retaining ring 320 is axially inserted from the end of the pressure ring 310. The interference fit ensures that the retaining ring 320 and the outer circumferential surface of the pressure ring 310 are tightly fitted without radial loosening. This effectively restricts the radial expansion deformation of the pressure ring 310 and prevents the pressure ring 310 from undergoing radial displacement when subjected to axial force or vibration, ensuring a tight fit between the pressure ring 310 and the pin 200.

[0041] Based on the pressure ring 310, a retaining ring 320 is added to form a double protection structure. The retaining ring 320 applies radial restraint to the pressure ring 310 through an interference fit, effectively preventing radial expansion deformation of the pressure ring 310 and ensuring the contact stability between the pressure ring 310 and the pin 200. At the same time, the setting of the retaining ring 320 enhances the overall structural strength of the snap ring assembly 300 and improves the axial force bearing capacity of the pressure ring 310.

[0042] Reference Figures 2-6 As shown, in some embodiments, the snap ring assembly 300 further includes a resilient snap ring 330; The elastic retaining ring 330 is sleeved on the outer circumferential surface of the pressure ring 310 and abuts against the retaining ring 320.

[0043] The snap ring assembly 300 also includes an elastic snap ring 330, which can be made of a highly elastic metal material, has good elastic deformation capability and fatigue strength, and can maintain stable elastic performance after multiple disassembly and assembly and long-term stress. Its structural design is adapted to the outer peripheral surface contour of the pressure ring 310.

[0044] The elastic retaining ring 330 is sleeved on the outer circumferential surface of the pressure ring 310 and abuts against the retaining ring 320. After sleeved, the elastic retaining ring 330 is tightly attached to the outer circumferential surface of the pressure ring 310 by its own elastic tension, and one end face of the retaining ring 320 is tightly abutted against the end face of the retaining ring 320, forming an axial limit on the retaining ring 320, preventing the retaining ring 320 from falling off along the axial direction of the pressure ring 310 due to vibration or axial force. At the same time, the elastic tension further enhances the radial constraint effect of the retaining ring 320 on the pressure ring 310.

[0045] The elastic properties of the elastic retaining ring 330 not only ensure the reliable axial positioning of the retaining ring 320, but also facilitate disassembly and assembly. Compared with traditional rigid locking components, it can be installed and removed without complicated tools.

[0046] The locking structure provided in this application achieves distributed bearing of axial force through the coordinated operation of multiple components. Specifically, the force transmission path is as follows: when the column of the large-angle working surface repeatedly rises and falls, generating axial force, the axial force is first transmitted from the column to the column pressure plate 100; the column pressure plate 100 transmits the axial force to the pressure ring 310 it abuts against. At this time, the pressure ring 310 engages with the annular positioning groove 221 of the rod end 220 of the pin 200 through the positioning protrusion 312 on its inner wall, directly transmitting part of the axial force to the pin 200; simultaneously, the retaining ring 320 sleeved on the outer circumference of the pressure ring 310 limits the force through an interference fit. The radial expansion of the pressure ring 310 converts another part of the axial force borne by the pressure ring 310 into a radial constraint force, preventing the pressure ring 310 from deforming due to excessive axial force. Finally, the axial displacement of the retaining ring 320 is blocked by the elastic retaining ring 330 embedded in the annular retaining ring groove 313 of the pressure ring 310. The elastic retaining ring 330 further disperses the axial force transmitted by the retaining ring 320 through its own elastic tension, forming a multi-path force transmission system of 'column → column pressure plate → pressure ring → pin / retaining ring → elastic retaining ring', which completely changes the drawback of the traditional structure where the axial force is only borne by a single D-shaped clip or cotter pin.

[0047] Furthermore, in some embodiments, the outer peripheral surface of the pressure ring 310 is provided with an annular retaining spring groove 313, and the elastic retaining spring 330 is embedded in the annular retaining spring groove 313.

[0048] The outer circumferential surface of the pressure ring 310 is provided with an annular retaining spring groove 313. The width and depth of the annular retaining spring groove 313 match the cross-sectional dimensions of the elastic retaining spring 330, ensuring that the elastic retaining spring 330 has no obvious protrusion after being installed, thus avoiding interference with other components.

[0049] The outer circumferential surface of the pressure ring 310 is provided with an annular retaining spring groove 313. The annular retaining spring groove 313 is a groove opened along the circumferential direction of the outer circumferential surface of the pressure ring 310. Its width and depth match the cross-sectional dimensions of the elastic retaining spring 330, ensuring that the elastic retaining spring 330 can completely fit the groove wall after being installed. Moreover, the outer circumferential surface of the elastic retaining spring 330 is basically flush with the outer circumferential surface of the pressure ring 310, without any obvious protrusion.

[0050] The elastic retaining ring 330 is fitted into the annular retaining ring groove 313. After fitting, the groove wall of the annular retaining ring groove 313 forms a double limit on the elastic retaining ring 330 in both circumferential and axial directions, preventing the elastic retaining ring 330 from axially shifting or rotating due to vibration or force, ensuring a stable contact between the elastic retaining ring 330 and the retaining ring 320, and preventing the elastic retaining ring 330 from interfering with other components.

[0051] By adding an annular retaining ring groove 313, the precise positioning and stable installation of the elastic retaining ring 330 are achieved; this not only avoids the displacement and interference problems of the elastic retaining ring 330, but also enhances the limiting reliability of the elastic retaining ring 330, enabling the elastic retaining ring 330 to continuously and stably apply axial constraint force to the retaining ring 320.

[0052] Furthermore, in some embodiments, the elastic retaining spring 330 has an annular opening structure, and both ends of the elastic retaining spring 330 are provided with extension lugs 331, and the extension lugs 331 are provided with operating holes 332.

[0053] The elastic retaining spring 330 has an annular opening structure, which makes it easy to quickly insert or remove the elastic retaining spring 330 into the pressure ring 310 after it is opened, without damaging the parts.

[0054] Both ends of the elastic retaining spring 330 are provided with extension lugs 331. The extension lugs 331 and the elastic retaining spring 330 are integrally formed and can be made of the same high-elasticity metal material to ensure that their strength is consistent with that of the elastic retaining spring 330. The extension lugs 331 are provided with operating holes 332. The operating holes 332 are circular through holes that are suitable for inserting commonly used tools. The opening width of the elastic retaining spring 330 can be easily adjusted by prying the extension lugs 331 with tools, without having to directly touch the elastic retaining spring 330 with your hands, making the operation safe and convenient.

[0055] Reference Figure 1 As shown, in some embodiments, the head end 210 of the pin 200 is provided with an annular limiting step on the side near the rod end 220, and the annular limiting step abuts against the side of the main reinforcement bar of the column that is close to itself. The end of the rod end 220 of the pin 200 is provided with a guide cone surface 222.

[0056] The head end 210 of the pin 200 is provided with an annular limiting step on the side near the rod end 220. The annular limiting step abuts against the side of the main reinforcement bar of the column that is close to itself. The diameter of the annular limiting step is larger than the diameter of the connecting hole of the main reinforcement bar of the column. After abutting, it can form a stable axial support, prevent the head end 210 from sinking into the connecting hole due to force, and enhance the limiting reliability of the head end 210.

[0057] The end of the rod end 220 of the pin 200 is provided with a guide cone surface 222. The guide cone surface 222 adopts a smoothly transitioned inclined surface design. When the pin 200 passes through the main rib connection hole of the column and the through hole 110 of the column pressure plate 100, it can play a guiding role, avoid the end of the rod end 220 from getting stuck due to the sharp corner, simplify the assembly process, and reduce the wear of the parts during assembly.

[0058] This application also provides a hydraulic support, including the locking structure of the hydraulic support column pressure plate described above.

[0059] The hydraulic support provided in this application is suitable for fully mechanized mining faces with different dip angles in underground coal mines. It is especially designed for special working conditions of large dip angle working faces. By integrating the above-mentioned locking structure, the column and the main reinforcement of the column are firmly locked, which fundamentally avoids the safety hazards caused by the failure of the column due to locking.

[0060] By integrating the aforementioned locking structure, the hydraulic support improves the column locking performance. Compared to traditional hydraulic supports, it can effectively cope with the continuous axial force generated by the repeated extension and retraction of the column in a steep working face, completely solving the problems of easy breakage and detachment of traditional locking structures. The compatibility design of the locking structure with other components of the hydraulic support ensures the overall coordination and stability of the hydraulic support, extends the overall service life of the hydraulic support, and reduces equipment maintenance costs. At the same time, it significantly improves the applicability of the hydraulic support under harsh working conditions, providing reliable equipment support for efficient and safe mining in coal mines.

[0061] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.

[0062] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A locking structure for a hydraulic support column pressure plate, characterized in that: Includes column pressure plate (100), pin (200) and snap ring assembly (300); The column pressure plate (100) is provided with a through hole (110). The pin (200) has a head end (210) and a rod end (220) respectively. The rod end (220) of the pin (200) passes through the connecting hole of the main rib of the column and the through hole (110) of the column pressure plate (100) in sequence, and is connected to the snap ring assembly (300). The head end (210) of the pin (200) is engaged with the main rib of the column, and the snap ring assembly (300) is engaged with the column pressure plate (100).

2. The locking structure of the hydraulic support column pressure plate according to claim 1, characterized in that: The snap ring assembly (300) includes a pressure ring (310); The pressure ring (310) is sleeved on the outer circumferential surface of the rod end (220) of the pin (200) and abuts against the column pressure plate (100).

3. The locking structure of the hydraulic support column pressure plate according to claim 2, characterized in that: The pressure ring (310) is composed of two symmetrically arranged semi-circular pressure rings (311). The two semi-circular pressure rings (311) are spliced ​​together to form an annular structure, which is sleeved on the outer circumferential surface of the rod end (220) of the pin (200).

4. The locking structure of the hydraulic support column pressure plate according to claim 2, characterized in that: The outer circumferential surface of the rod end (220) of the pin (200) is provided with an annular positioning groove (221). The inner wall of the pressure ring (310) is provided with a positioning protrusion (312) at one end near the column pressure plate (100), and the positioning protrusion (312) is engaged in the annular positioning groove (221).

5. The locking structure of the hydraulic support column pressure plate according to claim 2, characterized in that: The snap ring assembly (300) also includes a retaining ring (320); The retaining ring (320) is sleeved on the outer circumferential surface of the pressure ring (310).

6. The locking structure of the hydraulic support column pressure plate according to claim 5, characterized in that: The snap ring assembly (300) also includes a resilient snap ring (330); The elastic retaining ring (330) is sleeved on the outer peripheral surface of the pressure ring (310) and abuts against the retaining ring (320).

7. The locking structure of the hydraulic support column pressure plate according to claim 6, characterized in that: The outer circumferential surface of the pressure ring (310) is provided with an annular retaining spring groove (313), and the elastic retaining spring (330) is embedded in the annular retaining spring groove (313).

8. The locking structure of the hydraulic support column pressure plate according to claim 6, characterized in that: The elastic retaining ring (330) has an annular opening structure. Both ends of the elastic retaining ring (330) are provided with extension lugs (331), and the extension lugs (331) are provided with operating holes (332).

9. The locking structure of the hydraulic support column pressure plate according to claim 1, characterized in that: The head end (210) of the pin (200) is provided with an annular limiting step on the side near the rod end (220), and the annular limiting step abuts against the side of the main reinforcement bar of the column that is close to itself. The end of the rod end (220) of the pin (200) is provided with a guide cone surface (222).

10. A hydraulic support, characterized in that: Includes the locking structure of the hydraulic support column pressure plate as described in any one of claims 1-9.

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