Push rod and hydraulic support

Abstract

The utility model provides a kind of push rod and hydraulic support, push rod is used to connect the pusher of conveyor and hydraulic support, push rod includes body, first connecting piece and second connecting piece, body includes bottom plate, connecting plate and cover plate;Along the thickness direction of body, cover plate, connecting plate and bottom plate are stacked distribution, at least part of connecting plate and bottom plate is attached, at least part of connecting plate and cover plate is attached;First connecting piece, it is set in one end of body, is located on bottom plate, for being connected with pusher;Second connecting piece, it is set in other end of body, is located on bottom plate, for being connected with conveyor.The push rod proposed in the utility model, through three-plate laminated attachment structure, while significantly reducing the overall thickness of push rod, meet the requirement of compactness of equipment to thin coal seam, effectively transfer and distribute internal force using connecting plate, ensure that push rod has sufficient rigidity and strength.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, and more specifically, to a push rod and a hydraulic support. Background Technology

[0002] The push rod is a key transmission component of the hydraulic support, enabling it to perform the two core functions of "pushing" and "moving". The push rod is typically horizontally positioned in the middle of the hydraulic support's base, hinged at its front end to the conveyor and connected to the pushing device at its rear. During operation, the push rod must withstand the thrust from the conveyor and the enormous tensile force during support movement, making it a crucial load-bearing hub for ensuring the normal operation of the longwall mining face.

[0003] In related technologies, to withstand complex loads, push rods are typically designed with a closed box-shaped cross-section consisting of a base plate, a cover plate, and internal vertical reinforcing ribs. While this structure ensures strength, its inherent physical thickness is relatively large. Within the limited support space of hydraulic supports in thin coal seams, this directly restricts the minimum working height of the hydraulic support, making it difficult to meet the stringent requirements for equipment compactness in thin coal seams. Simply thinning the box-shaped structure to adapt to space constraints would result in insufficient overall stiffness and strength of the push rod, affecting its use. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the first aspect of this utility model proposes a push rod.

[0006] The second aspect of this utility model proposes a hydraulic support.

[0007] In view of the above, the first aspect of this utility model provides a push rod for connecting a conveyor and a hydraulic support, the push rod including a body, a first connecting member and a second connecting member, the body including a base plate, a connecting plate and a cover plate; the cover plate, the connecting plate and the base plate are stacked along the thickness direction of the body, the connecting plate is at least partially attached to the base plate, and the connecting plate is at least partially attached to the cover plate; the first connecting member is disposed at one end of the body, located on the base plate, and is used to connect with the pushing device; the second connecting member is disposed at the other end of the body, located on the base plate, and is used to connect with the conveyor.

[0008] The push rod proposed in this utility model mainly consists of a body, a first connecting member, and a second connecting member. The body, as the core load-bearing structure of the push rod, includes a base plate, a connecting plate, and a cover plate. Along the thickness direction of the body, the base plate, connecting plate, and other components are stacked and distributed, and at least partially bonded to each other by the connecting plate, the base plate, and the cover plate, forming a stable composite structure. Optionally, on one hand, the connecting plate is fully bonded to the base plate and fully bonded to the cover plate; on the other hand, the connecting plate is partially bonded to the base plate and fully bonded to the cover plate; in yet another case, the connecting plate is partially bonded to the base plate and partially bonded to the cover plate; and in yet another case, the connecting plate is fully bonded to the base plate and partially bonded to the cover plate. Specifically, along the thickness direction of the body, the base plate is located at the bottom, the connecting plate is located above the base plate, and the cover plate is located above the connecting plate.

[0009] The first connector is located at one end of the main body and is used to hinge the push rod to the moving device of the hydraulic support. The second connector is located at the other end of the main body and is used to connect to the conveyor, so that the push rod becomes a power transmission structure connecting the conveyor and the hydraulic support.

[0010] In confined working environments such as thin coal seams, existing push rods often have a large thickness to ensure strength, which severely restricts the minimum working height of hydraulic supports. Simply reducing the thickness would directly weaken the stiffness and strength of the push rod, making it difficult to withstand the huge loads under conditions such as rigging, posing a safety hazard.

[0011] To address the above issues, this invention presents a layered composite structure. This invention abandons the traditional box-type structure design that relies on the overall cross-sectional height to ensure rigidity, instead employing a compact form where three layers of plates—a cover plate, a connecting plate, and a bottom plate—are stacked and bonded together along the thickness direction. The upper and lower sides of the connecting plate are respectively bonded and fixed to at least a portion of the cover plate and the bottom plate, forming an internal, multi-layered composite rigid body. This structure fundamentally eliminates the space required by traditional box-type structures to accommodate the internal stiffening plates, significantly reducing the overall thickness of the push rod body and directly meeting the stringent requirements of thin coal seams for equipment compactness. Meanwhile, the introduction of the connecting plate is not simply a matter of thinning, but rather an optimization of material distribution and force transmission path. The connecting plate not only establishes a robust connection between the cover plate and the bottom plate, combining them into a cohesive whole and greatly enhancing the structural bending stiffness, but also effectively disperses localized concentrated loads rapidly throughout the entire three-layer composite structure under load, allowing all three layers to work together. This avoids buckling or tearing under high loads caused by excessive thinning of a single-layer cover plate or bottom plate. This invention achieves a balance between physical dimensional thinning and guaranteed mechanical strength through structural simplification and optimized force transmission.

[0012] In summary, the push rod proposed in this invention, through a three-plate laminated structure, significantly reduces the overall thickness of the push rod and meets the extreme compactness requirements of thin coal seams. Simultaneously, the connecting plate enables effective transmission and distribution of internal forces, ensuring sufficient rigidity and strength of the push rod. This solves the technical challenge of balancing equipment thickness and load-bearing reliability.

[0013] In some technical solutions of this utility model, optionally, the connecting plate is partially attached to the base plate, and along the length direction of the body, the distance between the connecting plate and the second connecting member is less than the distance between the connecting plate and the first connecting member.

[0014] In some technical solutions of this utility model, optionally, the cover plate includes a first plate and a second plate. The first plate is disposed on the connecting plate, wherein the first plate, the connecting plate and the bottom plate form a three-layer superimposed structure; one end of the second plate is connected to the first plate and extends from the connection with the first plate towards the bottom plate, and part of the second plate is attached to the bottom plate to form a two-layer superimposed structure.

[0015] Optionally, in some technical solutions of this utility model, the second plate includes a first transition section and a first straight plate section. One end of the first transition section is connected to the first plate and extends inclined towards the bottom plate. The other end of the first straight plate section is connected to the first transition section and is fixedly attached to the bottom plate. The push rod also includes a first reinforcing structure. One side of the first reinforcing structure is connected to the first transition section, and the other side of the first reinforcing structure is connected to the bottom plate.

[0016] Optionally, in some technical solutions of this utility model, a waste rock discharge hole is provided on the bottom plate for waste rock to fall; an avoidance notch is provided on the first straight plate section, which is provided above the waste rock discharge hole and corresponds to the waste rock discharge hole, and is connected to the waste rock discharge hole.

[0017] Optionally, in some technical solutions of this utility model, the first plate includes a second straight plate segment, a second transition segment, and a third straight plate segment. The second straight plate segment is fixedly connected to the connecting plate and is arranged parallel to the connecting plate. One end of the second transition segment is connected to the second straight plate segment, and the second transition segment extends from the connection point with the second straight plate segment in a direction away from the connecting plate. The third straight plate segment is connected to the other end of the second transition segment and is arranged parallel to the bottom plate. Along the thickness direction of the body, the third straight plate segment is located above the bottom plate, and an installation space is formed between the third straight plate segment and the bottom plate. The second connecting member is located within the installation space.

[0018] Optionally, in some technical solutions of this utility model, the push rod further includes a second reinforcing structure, which is disposed between the first transition section and the connecting plate.

[0019] In some technical solutions of this utility model, optionally, the push rod further includes: at least two side plates, a portion of the at least two side plates being connected to one side of the body, and another portion of the at least two side plates being connected to the other side of the body; a first cover plate, connected to the at least two side plates and the third straight plate segment; and a second cover plate, connected to the at least two side plates and the bottom plate.

[0020] Optionally, in some technical solutions of this utility model, the push rod also includes a limiting member; a limiting hole is provided on the side plate, the limiting member is embedded in the limiting hole, and part of the limiting member protrudes out of the limiting hole and is located on the outside of the body.

[0021] According to a second aspect of the present invention, a hydraulic support is provided, the hydraulic support including a push rod as described in any of the above technical solutions.

[0022] The hydraulic support proposed in the second aspect of this utility model, because it includes the push rod as in any of the above technical solutions, has all the beneficial effects of the push rod in any of the above technical solutions.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 One of the structural schematic diagrams of the push rod proposed in this utility model is shown; Figure 2 The second schematic diagram of the push rod proposed in this utility model is shown. Figure 3 for Figure 2 AA section view; Figure 4 for Figure 3 BB section view; Figure 5 A schematic diagram of the hydraulic support proposed in this utility model is shown.

[0025] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows: 10 Hydraulic support, 100 Push rod, 110 Body, 112 Base plate, 114 Waste discharge hole, 116 Connecting plate, 118 Cover plate, 120 First plate body, 122 Second straight plate section, 124 Second transition section, 126 Third straight plate section, 128 Second plate body, 130 First transition section, 132 First straight plate section, 134 Clearance notch, 140 First reinforcing structure, 142 Second reinforcing structure, 144 Side plate, 146 First covering plate, 148 Second covering plate, 150 Limiting component, 152 Limiting hole, 154 Stop pin seat, 156 Locking pin, 158 Second connecting pin, 160 First connecting component, 162 Second connecting component, 164 Reinforcing rib plate, 166 First connecting pin, 168 Installation space, 200 Base, 300 Pushing device. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] The following reference Figures 1 to 5 This invention describes the push rod 100 and the hydraulic support 10 proposed in this utility model.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in an embodiment of this utility model, a push rod 100 is proposed for connecting a conveyor and a hydraulic support 10 pushing device 300. The push rod 100 includes a body 110, a first connecting member 160, and a second connecting member 162. The body 110 includes a base plate 112, a connecting plate 116, and a cover plate 118. Along the thickness direction of the body 110, the cover plate 118, the connecting plate 116, and the base plate 112 are stacked. The connecting plate 116 is at least partially attached to the base plate 112, and at least partially attached to the cover plate 118. The first connecting member 160 is disposed at one end of the body 110, located on the base plate 112, and is used to connect with the pushing device 300. The second connecting member 162 is disposed at the other end of the body 110, located on the base plate 112, and is used to connect with the conveyor.

[0030] In this embodiment, the push rod 100 proposed by this utility model is composed of a body 110, a first connecting member 160, and a second connecting member 162. The body 110, as the core load-bearing structure of the push rod 100, includes a base plate 112, a connecting plate 116, and a cover plate 118. Along the thickness direction of the body 110 (e.g., ...) Figure 3 (In the direction indicated by the middle arrow C), the base plate 112, the connecting plate 116 and the base plate 118 are stacked and distributed, and at least part of the connecting plate 116 is attached to the base plate 112 and the cover plate 118 to form a stable composite structure.

[0031] Optionally, on one hand, the connecting plate 116 is fully attached to the base plate 112 and fully attached to the cover plate 118; on the other hand, the connecting plate 116 is partially attached to the base plate 112 and fully attached to the cover plate 118; on yet another hand, the connecting plate 116 is partially attached to the base plate 112 and partially attached to the cover plate 118; and on yet another hand, the connecting plate 116 is fully attached to the base plate 112 and partially attached to the cover plate 118. Specifically, as... Figure 3 As shown, along the thickness direction of the body 110, the bottom plate 112 is located at the bottom, the connecting plate 116 is located above the bottom plate 112, and the cover plate 118 is located above the connecting plate 116.

[0032] The first connector 160 is located at one end of the main body 110 and is used to hinge the push rod 100 as a whole to the pushing device 300 of the hydraulic support 10. The second connector 162 is located at the other end of the main body 110 and is used to connect to the conveyor, so that the push rod 100 becomes the power transmission hub connecting the conveyor and the hydraulic support 10.

[0033] In confined working environments such as thin coal seams, the push rods in related technologies often have a large thickness to ensure strength, which severely restricts the minimum working height of hydraulic supports. Simply reducing the thickness would directly weaken the stiffness and strength of the push rod, making it difficult to withstand the huge loads under conditions such as rigging, posing a safety hazard.

[0034] To address the aforementioned problems, this invention designs a layered composite structure. This invention abandons the traditional box-type structure's reliance on overall cross-sectional height to ensure rigidity. Its core lies in the compact form of three layers of plates—cover plate 118, connecting plate 116, and bottom plate 112—layered and bonded together along the thickness direction. The upper and lower sides of the connecting plate 116 are respectively bonded and fixed to at least a portion of the cover plate 118 and the bottom plate 112, forming an internal, multi-layered composite rigid body. This structure fundamentally eliminates the space required by traditional box-type structures to accommodate internal stiffening plates, significantly reducing the overall thickness of the push rod 100 body 110 and directly meeting the stringent requirements of thin coal seams for equipment compactness. Meanwhile, the introduction of the connecting plate 116 is not simply a matter of thinning, but rather an optimization of material distribution and force transmission path. The connecting plate 116 not only establishes a robust connection between the cover plate 118 and the bottom plate 112, combining them into a cohesive whole and greatly enhancing the structural bending stiffness, but also effectively disperses localized concentrated loads rapidly throughout the entire three-layer composite structure under load, allowing all three layers to work together. This prevents buckling or tearing under high loads caused by excessive thinning of the single-layer cover plate 118 or bottom plate 112. Therefore, this invention achieves a balance between physical dimensional thinning and guaranteed mechanical strength through structural simplification and optimized force transmission.

[0035] In summary, the push rod 100 proposed in this utility model, through a three-plate stacked bonding structure, significantly reduces the overall thickness of the push rod 100 and meets the requirements of extreme compactness for equipment in thin coal seams. At the same time, it utilizes the connecting plate 116 to achieve effective transmission and distribution of internal forces, ensuring that the push rod 100 has sufficient rigidity and strength. This solves the technical problem of balancing equipment thickness and load-bearing reliability.

[0036] Specifically, the cover plate 118, connecting plate 116, and base plate 112 are stacked along the thickness direction of the body 110. Viewed from the length and width directions of the body 110, the orthographic projections of the connecting plate 116 onto the base plate 112 and the cover plate 118 onto the connecting plate 116 at least partially overlap. This overlapping area of ​​projection constitutes an effective connection area where the three components fit together and share force, forming a stable composite beam structure.

[0037] Specifically, the second connector 162 is disposed at the front end of the base plate 112, and the first connector 160 is disposed at the rear end of the base plate 112.

[0038] Specifically, the first connector 160 is fixedly connected to the rear end of the base plate 112 by welding, and the second connector 162 is set at the front end of the base plate 112 by welding or pin connection.

[0039] Optionally, on one hand, the first connecting member 160 includes a hinged lug. The hinged lug is welded and fixed to one end of the base plate 112 near the pushing device 300, i.e., the rear end, and is hinged to the pushing device 300 via a first connecting pin 166. On the other hand, the first connecting member 160 may also be a pin hole penetrating the base plate 112, and connected to a corresponding lug on the pushing device 300 via a pin.

[0040] Specifically, a reinforcing rib plate 164 is welded to the tail end of the base plate 112, near the hinge ear plate. One side of the reinforcing rib plate 164 is welded and fixed to the base plate 112, and the other side is connected to the root of the hinge ear plate. This utility model achieves local reinforcement of the ear plate connection area through this triangular support structure, effectively improving the structural stiffness and load-bearing capacity of this part when subjected to the force of the pushing jack.

[0041] Optionally, the second connecting member 162 includes a connector. The connector is hinged to the front end of the base plate 112 via a pin, and its other end is used to connect to the scraper conveyor, thereby realizing the power transmission between the push rod 100 and the conveyor. Alternatively, the second connecting member 162 can also be a hinge seat disposed at the front end of the base plate 112. The hinge seat has a pin hole, and is directly hinged to the connecting lug plate on the conveyor body via a pin.

[0042] Specifically, the pushing device 300 includes a pushing jack. The cylinder end of the pushing jack is hinged to the base 200 of the hydraulic support 10, and the piston rod end is hinged to the first connecting member 160 via a pin, forming a complete push-slide-shift power transmission mechanism.

[0043] Specifically, the conveyor is a scraper conveyor. The scraper conveyor has a dedicated connecting lug or connector on the side of the trough near the goaf. It is hinged to the second connector 162 at the front end of the push rod 100 through a pin, so that the push rod 100 can transmit the pushing force and the moving force to it.

[0044] Specifically, the moving process is as follows: the jack retracts, and the cylinder applies a pulling force towards the support direction to the body 110 of the push rod 100 through the first connecting piece 160. At this time, the rear end of the body 110 of the push rod 100 is the main force-bearing point. This pulling force is transmitted to the front end of the second connecting piece 162 through the three-layer composite structure, and finally acts on the conveyor hinged to the second connecting piece 162, pulling the entire hydraulic support 10 towards the coal wall, thus completing the moving action.

[0045] Specifically, the pushing process is as follows: the jack extends, and the piston rod applies a thrust towards the coal wall to the body 110 of the push rod 100 through the first connecting piece 160. At this time, the front end of the body 110 of the push rod 100 is the main force-bearing point. This thrust is transmitted to the second connecting piece 162 at the front end through the three-layer composite structure, and finally pushes the conveyor to move a certain distance towards the coal wall, completing the pushing action.

[0046] Alternatively, on one hand, the connecting plate 116 is welded to the base plate 112. Through continuous fillet welds or intermittent welds, the bottom edge and sides of the connecting plate 116 are firmly connected to the upper surface of the base plate 112, ensuring effective transmission of shear force and bending moment between them. On the other hand, the connecting plate 116 can also be connected to the base plate 112 using a high-strength adhesive. A high-performance structural adhesive is applied to the contact surface, and the connecting plate 116 is bonded to the base plate 112 through an adhesive bonding process. This method results in uniform stress distribution and helps avoid thermal deformation caused by welding.

[0047] Alternatively, on one hand, the cover plate 118 is welded to the connecting plate 116. The bottom edge of the cover plate 118 is welded and fixed to the upper surface and sides of the connecting plate 116, so that the three form a rigid whole to jointly resist bending deformation under working load. On the other hand, the cover plate 118 can also be bolted to the connecting plate 116. Using bolts to fasten the cover plate 118, the connecting plate 116, and the base plate 112 together in the contact area facilitates on-site maintenance and component replacement.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of this utility model, optionally, the connecting plate 116 is partially attached to the base plate 112, and along the length direction of the body 110 (e.g., Figure 3 (As indicated by arrow D in the diagram), the distance between the connecting plate 116 and the second connecting member 162 is less than the distance between the connecting plate 116 and the first connecting member 160.

[0049] In this embodiment, the connecting plate 116 does not cover the entire length of the base plate 112, but only a portion thereof. Specifically, along the length of the push rod 100, the connecting plate 116 is positioned closer to the second connecting member 162 used to connect the conveyor, and the distance between the connecting plate 116 and the second connecting member 162 is less than the distance between the connecting plate 116 and the first connecting member 160 used to connect the pushing device 300.

[0050] This invention optimizes structural load-bearing capacity. The critical reinforcing component, connecting plate 116, is positioned in the high-stress region at the front of the push rod 100. During operation, whether it's the tensile force transmitted through the first connector 160 during frame movement or the thrust transmitted through the second connector 162 during sliding, the critical sections generating maximum bending moment and shear force are typically closer to the middle of the push rod 100 and the area adjacent to the front second connector 162. This embodiment, by positioning the connecting plate 116 towards this high-load region, effectively places the primary reinforcing material where it is most needed, significantly improving the bending and shear strength of the push rod 100 at critical locations. Furthermore, this invention achieves efficient material utilization and optimal matching of structural performance, avoiding the use of unnecessary materials in the less stressed rear region. This allows the push rod 100 to achieve optimized overall weight and manufacturing cost while ensuring targeted rigidity and strength at critical locations, thereby guaranteeing the reliability and durability of the push rod 100 under complex load conditions.

[0051] It is understood that the base plate 112 can be divided into a first region and a second region along its length. The connecting plate 116 is disposed in the first region and is attached to the surface of the base plate 112 in that region. The first connector 160 and the second connector 162 are located at the two ends of the base plate 112, respectively. This results in a certain gap between the front end of the connecting plate 116 and the second connector 162, and between its rear end and the first connector 160, within the projection range of the base plate 112. This allows the connecting plate 116 to be precisely positioned as an independent reinforcing structure in the high-stress load-bearing area in the middle of the base plate 112.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of the present invention, optionally, the cover plate 118 includes a first plate 120 and a second plate 128. The first plate 120 is disposed on the connecting plate 116, wherein the first plate 120, the connecting plate 116 and the bottom plate 112 form a three-layer superimposed structure; one end of the second plate 128 is connected to the first plate 120 and extends from the connection point with the first plate 120 toward the direction close to the bottom plate 112, and part of the second plate 128 is attached to the bottom plate 112 to form a two-layer superimposed structure.

[0053] In this embodiment, the cover plate 118 is designed to include a first plate 120 and a second plate 128 connected to each other. The first plate 120 is positioned on top of the connecting plate 116, forming a stable three-layer stacked structure with the first plate 120, the connecting plate 116, and the base plate 112 in this region. One end of the second plate 128 is connected to the first plate 120 and extends towards the base plate 112 from the connection point, eventually directly contacting the base plate 112 to form a two-layer stacked structure. When the pushing device 300 performs telescopic movement, the body 110 of the push rod 100 needs to move within its range of motion. By designing the rear section of the cover plate 118 as a two-layer structure extending towards and contacting the base plate 112, a thinning transition region is effectively formed in the middle and rear part of the body 110. This design ensures the structural strength of the push rod 100 while providing ample physical clearance for the movement of the pushing device 300, effectively preventing mechanical interference or collision between the push rod 100 and the adjacent pushing device 300 during reciprocating motion, thus ensuring the smoothness and reliability of the overall movement of the hydraulic support 10.

[0054] Specifically, the first plate 120 and the second plate 128 can be two independent plates, which are fixedly connected at their joint by welding. The first plate 120 and the second plate 128 can adopt an integral structure, that is, they are formed by bending a complete plate at a specific position to form a continuous integral component that combines the horizontal extension of the first plate 120 and the inclined and vertical extension of the second plate 128.

[0055] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of this utility model, optionally, the second plate 128 includes a first transition section 130 and a first straight plate section 132. One end of the first transition section 130 is connected to the first plate 120 and extends obliquely toward the base plate 112. The first straight plate section 132 is connected to the other end of the first transition section 130 and is fitted and fixed to the base plate 112. The push rod 100 also includes a first reinforcing structure 140. One side of the first reinforcing structure 140 is connected to the first transition section 130, and the other side of the first reinforcing structure 140 is connected to the base plate 112.

[0056] In this embodiment, the structure of the second plate 128 is designed to include a first transition section 130 and a first straight plate section 132. One end of the first transition section 130 is connected to the first plate 120 and extends towards the base plate 112 at a certain angle. The first straight plate section 132 is connected to the other end of the first transition section 130 and is fixedly attached to the surface of the base plate 112. In addition, the push rod 100 also includes a first reinforcing structure 140, one side of which is connected to the first transition section 130 and the other side is connected to the base plate 112, forming a stable triangular support system.

[0057] This invention improves the load-bearing performance of the push rod 100 under harsh working conditions. In the case of a tension frame, when a large tensile force and eccentric bending moment act on the front end of the push rod 100 through the second connector 162, the force is transmitted to the second plate 128 via the first plate 120. At this time, the inclined design of the first transition section 130 achieves smooth force redirection, while the close fit and fixation between the first straight plate section 132 and the base plate 112 ensures effective load transfer. The first reinforcing structure 140, by connecting the first transition section 130 and the base plate 112, constructs reliable reinforcing support in the weak area of ​​the two-layer superimposed structure, effectively suppressing the deformation tendency that may occur in this area under complex loads.

[0058] Optionally, the first reinforcing structure 140 is connected by welding, and its two joints are fixed to the outer surface of the first transition section 130 and the upper surface of the base plate 112 by continuous welds to ensure effective load transfer.

[0059] Optionally, the first reinforcing structure 140 is a reinforcing rib, which is a plate-shaped structure. Its two sides are welded and fixed to the first transition section 130 and the base plate 112 respectively to form a stable triangular support.

[0060] The first reinforcing structure 140 can also be a support block, which is a block-shaped metal component that is welded to the first transition section 130 and the base plate 112 through its two end faces to provide rigid support.

[0061] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of this utility model, optionally, a gangue discharge hole 114 is provided on the bottom plate 112, which is used for gangue to fall; an avoidance notch 134 is provided on the first straight plate segment 132, which is provided above the gangue discharge hole 114 and corresponding to the gangue discharge hole 114, and communicates with the gangue discharge hole 114.

[0062] In this embodiment, a waste rock discharge hole 114 is provided on the bottom plate 112, and a corresponding clearance notch 134 is provided on the first straight plate section 132 above the bottom plate 112. The clearance notch 134 corresponds completely to the waste rock discharge hole 114 in the vertical projection direction, and the two are interconnected to form a complete waste rock dropping channel. This utility model effectively solves the problem of waste rock accumulation during the operation of the push rod 100. When the push rod 100 reciprocates in the underground working face, waste rock that collapses from the goaf may fall onto the upper surface of the push rod 100 and accumulate continuously. At this time, the accumulated waste rock can smoothly pass through the clearance notch 134 on the first straight plate section 132 under the action of gravity, and then naturally fall from the waste rock discharge hole 114 on the bottom plate 112 to the goaf, realizing automatic waste rock removal.

[0063] Optionally, the waste rock discharge hole 114 can be designed as a hole structure with specific geometric features, including but not limited to circular, elliptical, or polygonal holes. At the same time, the outline size of the clearance notch 134 is configured to be larger than the maximum aperture of the waste rock discharge hole 114, forming a gradually expanding channel structure from top to bottom.

[0064] Optionally, the edge of the waste discharge hole 114 is provided with an upwardly extending guide ring, which passes through the clearance notch 134 and protrudes from the upper surface of the first straight plate segment 132 to form an anti-accumulation structure.

[0065] Optionally, such as Figure 1 and Figure 2 As shown, the clearance notch 134 is constructed as a horizontally arranged U-shaped opening. The U-shaped notch is formed by an arc-shaped bottom and two vertical sides, with the arc-shaped bottom facing the second connector 162 and the two vertical sides extending forward in parallel, giving the entire notch a U-shaped shape with the front open. The arc-shaped bottom contour of the U-shaped notch maintains a predetermined distance from the rear edge of the waste rock discharge hole 114, while the two vertical sides of the notch extend forward along the axial direction of the waste rock discharge hole 114, with a length greater than the diameter of the waste rock discharge hole 114, forming a sufficient waste rock guiding area. This unique U-shaped structure allows the clearance notch 134 to form a gradually expanding collection area in front of the waste rock discharge hole 114, which can more effectively guide the waste rock accumulated on the push rod 100 to converge and fall towards the waste rock discharge hole 114.

[0066] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments of this utility model, optionally, the first plate 120 includes a second straight plate segment 122, a second transition segment 124, and a third straight plate segment 126. The second straight plate segment 122 is fixedly connected to the connecting plate 116 and is arranged parallel to the connecting plate 116. One end of the second transition segment 124 is connected to the second straight plate segment 122, and the second transition segment 124 extends from the connection point with the second straight plate segment 122 in a direction away from the connecting plate 116. The third straight plate segment 126 is connected to the other end of the second transition segment 124 and is arranged parallel to the base plate 112. Along the thickness direction of the body 110, the third straight plate segment 126 is located above the base plate 112, and an installation space 168 is formed between the third straight plate segment 126 and the base plate 112. The second connector 162 is located within the installation space 168.

[0067] In this embodiment, the first plate 120 is a continuous structure composed of a second straight plate segment 122, a second transition segment 124, and a third straight plate segment 126. The second straight plate segment 122 is fixedly connected to the connecting plate 116 below, and the two are parallel to each other. One end of the second transition segment 124 is connected to the second straight plate segment 122 and extends at an upward angle away from the connecting plate 116. The third straight plate segment 126 is connected to the other end of the second transition segment 124, maintaining a parallel orientation to the base plate 112, and retaining a certain space between itself and the base plate 112 in the thickness direction, together forming a stable installation space 168, within which the second connecting member 162 is accommodated. In this embodiment, when the push rod 100 is subjected to a pushing force or a shifting force from the conveyor, the force is transmitted to the third straight plate segment 126 through the second connecting member 162. The inclined design of the second transition section 124 achieves smooth force redirection, effectively dispersing and transferring the horizontal load to the second straight plate section 122 and the connecting plate 116 below. This multi-level force transmission path ensures uniform load distribution and avoids stress concentration. At the same time, the raised third straight plate section 126 provides ample space for the second connector 162 and its connecting mechanism, ensuring connection reliability while maintaining the overall low profile characteristics of the push rod 100.

[0068] Optionally, the structure of the first plate 120 can be manufactured using two different methods. One embodiment is a one-piece structure, where the second straight plate segment 122, the second transition segment 124, and the third straight plate segment 126 are integrally formed from the same metal sheet through a continuous bending process, with each segment naturally connected by rounded corners. This structure has good integrity and a continuous force transmission path. Another embodiment is a split welded structure, where the second straight plate segment 122, the second transition segment 124, and the third straight plate segment 126 are manufactured as independent components, and the components are connected and fixed at the joints by welding. This structure facilitates the use of plates of different thicknesses to achieve optimized material configuration.

[0069] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the push rod 100 may optionally include a second reinforcing structure 142, which is disposed between the second transition section 124 and the connecting plate 116.

[0070] In this embodiment, the push rod 100 further includes a second reinforcing structure 142, which is disposed between the second transition section 124 and the connecting plate 116. The two sides are fixedly connected to the inclined inner surface of the second transition section 124 and the upper surface of the connecting plate 116, respectively, forming an additional support member.

[0071] When push rod 100 bears a load from the conveyor, the force is transmitted to the third straight section 126 via the second connector 162, and then downwards via the second transition section 124. In this force transmission path, the second reinforcing structure 142, through its dual connection with the second transition section 124 and the connecting plate 116, effectively enhances the local stiffness of this critical transition area. It not only provides reliable intermediate support for the inclined second transition section 124, but also improves the stress state of the connecting plate 116 in the corresponding area, making load transmission more uniform and smooth.

[0072] Optionally, the second reinforcing structure 142 is connected to the second transition section 124 and the connecting plate 116 by welding, and is fixed by welding at their contact edges to ensure rigid force transmission.

[0073] Optionally, the second reinforcing structure 142 can also be fixed by screw connection. By opening threaded holes in the second reinforcing structure 142 and the corresponding connection position, a bolt assembly is used to fasten it between the second transition section 124 and the connecting plate 116, forming a detachable connection structure.

[0074] Optionally, the second reinforcing structure 142 is a reinforcing rib, which is a long strip-shaped structure. Its two sides are connected to the inner surface of the second transition section 124 and the upper surface of the connecting plate 116, respectively, forming a linear support extending along the width direction of the push rod 100.

[0075] Optionally, the second reinforcing structure 142 can also be a support block, which is a block-shaped metal component. Its upper and lower end faces are respectively in contact with the inner surface of the second transition section 124 and the upper surface of the connecting plate 116 to provide planar support.

[0076] like Figure 3As shown, in some embodiments of the present invention, optionally, the push rod 100 further includes: at least two side plates 144, a portion of the at least two side plates 144 being connected to one side of the body 110, and another portion of the at least two side plates 144 being connected to the other side of the body 110.

[0077] In this embodiment, the push rod 100 is also provided with at least two side plates 144, one of which is connected to one side of the body 110 and the other is connected to the other side of the body 110. These side plates 144 extend along the length of the push rod 100 and are distributed on both sides of the body 110.

[0078] The side plate 144 serves as a lateral reinforcement structure, forming a stable frame structure with the body 110. When the push rod 100 is subjected to load during operation, especially when subjected to eccentric or torsional loads, the side plates 144 distributed on both sides can effectively limit the lateral deformation of the body 110, enhancing the overall rigidity and stability of the push rod 100.

[0079] Specifically, there are two side plates 144, one of which is located on one side of the body 110, and the other side plate 144 is symmetrically arranged on the other side of the body 110. The two are arranged in parallel and extend along the length of the push rod 100.

[0080] Specifically, in terms of connection method, the side plate 144 is connected to the sides of the bottom plate 112, the connecting plate 116, and the cover plate 118 by welding. The full-circumference welding method makes the side plate 144 and each layer of plates form a complete box-shaped load-bearing structure, which significantly improves the overall rigidity and torsional performance of the push rod 100.

[0081] Optionally, the side plate 144 can also be connected to the main body 110 structure by bolts. In practice, bolt holes can be made on the side plate 144 and each layer plate, and high-strength bolts can be used to fasten the side plate 144 to both sides of the main body 110. This detachable connection method facilitates on-site maintenance and component replacement, while also providing reliable connection strength.

[0082] Specifically, the overall structural layout of the push rod 100 is as follows: the base plate 112, as the basic load-bearing component, is horizontally arranged at the bottom layer; the connecting plate 116 is stacked and fixed to the upper surface of the front area of ​​the base plate 112; the cover plate 118 covers the connecting plate 116 and the rear area of ​​the base plate 112; and two side plates 144 are vertically arranged on both sides of the base plate 112 and fixedly connected to the corresponding sides of the base plate 112, the connecting plate 116, and the cover plate 118, together forming a complete load-bearing frame. The first connecting member 160 is fixedly installed at the rear end of the base plate 112 for connecting the pushing device 300. The second connecting member 162 is located at the front end of the base plate 112 for connecting the conveyor.

[0083] Specifically, the third straight plate segment 126 is bent to form an L1 dimension with the base plate 112, and at the same time forms a semi-enclosed box-shaped installation space 168 with the side plates 144 on both sides, which is used to place the second connector 162 in the assembly process.

[0084] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of the present invention, optionally, the push rod 100 further includes: a first cover plate 146, connected to at least two side plates 144 and a third straight plate segment 126; and a second cover plate 148, connected to at least two side plates 144 and a bottom plate 112.

[0085] In this embodiment, the push rod 100 further includes a first cover plate 146 and a second cover plate 148. The first cover plate 146 is connected to at least two side plates 144 and a third straight plate segment 126, while the second cover plate 148 is connected to at least two side plates 144 and a bottom plate 112, together forming a complete reinforced structural system.

[0086] The encasing plate structure design in this invention achieves precise reinforcement of the key parts at the front end of the push rod 100. Specifically, the bent portion at the front end of the cover plate 118 cooperates with the base plate 112 to form an installation space 168 of a specific size, which, together with the side plates 144 on both sides, forms a semi-enclosed box-shaped structure. The first encasing plate 146 and the second encasing plate 148 are respectively welded to the upper and lower edges of the outer side of the semi-enclosed box-shaped structure to form a circumferential constraint. This design allows the front end of the push rod 100 to effectively distribute the concentrated load to the entire box-shaped structure through the reinforcement effect of the encasing plate when bearing the load from the connector.

[0087] Specifically, the first cover plate 146 and the second cover plate 148 can be connected to the side plate 144 and the corresponding plate by welding. A permanent fixed connection is formed by implementing continuous or intermittent welds at the contact edges.

[0088] Specifically, the connection between the first cover plate 146 and the second cover plate 148 and the side plate 144 and the corresponding plate body can also be made by bolt connection. By opening matching bolt holes in the cover plate and the corresponding connection parts, a high-strength bolt assembly is used for fastening connection.

[0089] Specifically, the first cover plate 146 is connected to at least two side plates 144 and the third straight plate segment 126, and the second cover plate 148 is connected to at least two side plates 144 and the bottom plate 112. Both the first cover plate 146 and the second cover plate 148 are disposed on the outer surface of the body 110, wrapping and reinforcing the outer contour of the semi-enclosed box structure.

[0090] like Figure 4 As shown, in some embodiments of this utility model, optionally, the push rod 100 further includes a limiting member 150; a limiting hole 152 is provided on the side plate 144, the limiting member 150 is embedded in the limiting hole 152, and a portion of the limiting member 150 protrudes out of the limiting hole 152 and is located on the outside of the body 110.

[0091] In this embodiment, the push rod 100 also includes a limiting member 150. A limiting hole 152 is provided on the side plate 144, the limiting member 150 is fitted into the limiting hole 152, and part of the structure of the limiting member 150 protrudes out of the limiting hole 152 and is located on the outside of the body 110.

[0092] When the push rod 100 reciprocates within the base 200, the limiting member 150 protruding from the surface of the side plate 144 mechanically interferes with the corresponding structure on the base 200, effectively limiting the displacement stroke of the push rod 100. This embedded installation method allows the limiting member 150 and the side plate 144 to form an integral load-bearing structure. Under severe impact, the load can be evenly transferred to the entire side plate 144 through the material around the limiting hole 152, avoiding the stress concentration problem that may occur with traditional welding methods.

[0093] In this embodiment, the embedded welding creates a highly integrated composite structure between the limiting member 150 and the side plate 144. When impacted by the base 200, the impact load is effectively dispersed through the material around the limiting hole 152, avoiding stress concentration issues common in traditional surface welding. This connection method significantly enhances the local strength and rigidity of the mounting base of the limiting member 150, enabling it to withstand repeated severe impacts without easily causing weld cracking. Furthermore, the protruding design of the limiting member 150 maintains reliable contact with the base 200, ensuring precise control of the displacement stroke of the push rod 100 within the base 200.

[0094] Specifically, the limiting structure adopts a symmetrical arrangement: the push rod 100 is provided with two limiting members 150, which are respectively installed on the two side plates 144. Each side plate 144 has a limiting hole 152, and the two limiting holes 152 are symmetrical in position and identical in size; the two limiting members 150 are respectively embedded in the corresponding limiting holes 152, forming a one-to-one assembly relationship. This symmetrical arrangement of the limiting structure of this utility model not only improves the movement stability of the push rod 100, but also significantly enhances the reliability and service life of the entire limiting structure through uniform load distribution, providing an important guarantee for the long-term stable operation of the push rod 100 in the thin coal seam hydraulic support 10.

[0095] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of this utility model, the push rod 100 may optionally include a stop pin seat 154 disposed on the upper end of the first cover plate 146. The stop pin seat 154 is fixedly connected to the upper surface of the first cover plate 146 by welding, and the interior of the stop pin seat 154 is provided with a through shaft hole for assembling the locking pin 156.

[0096] In this embodiment, the stop pin seat 154, as a block-shaped component, is vertically welded and fixed to the upper surface of the first cover plate 146. The stop pin seat 154 has a vertical through shaft hole machined inside. The second connecting pin 158 is vertically arranged and serves as the main load-bearing pin, passing through the shaft holes corresponding to the front end of the second connecting member 162 and the body 110 from top to bottom or from bottom to top, thereby realizing the hinge connection between the two.

[0097] The locking pin 156 is also vertically set. The locking pin 156 is inserted vertically into the vertical shaft hole of the stop pin seat 154 from above, and the lower end face is directly pressed against the upper end face of the second connecting pin 158.

[0098] In this embodiment, during the operation of the push rod 100, the second connecting pin 158 is subjected to alternating shear force and bending moment from the second connecting member 162. The locking pin 156, constrained by the stop pin seat 154, maintains an axially pressed state against the second connecting pin 158. When the equipment experiences severe vibration, the force attempting to disengage the second connecting pin 158 upwards is directly converted into pressure on the locking pin 156, and ultimately transmitted to the structurally robust first cover plate 146 and body 110 via the stop pin seat 154, thus achieving effective mechanical interlocking.

[0099] This utility model makes full use of the space above the push rod 100 through this overlapping locking structure, and is highly compatible with the thin design of the push rod 100. Without increasing the overall thickness of the push rod 100, a vertical locking pin 156 provides a reliable anti-dislodgement guarantee for the second connecting pin 158.

[0100] like Figure 5 As shown, in an embodiment of the present invention, a hydraulic support 10 is provided, which includes a push rod 100 as in any of the above embodiments.

[0101] In this embodiment, the hydraulic support 10 includes the push rod 100 as in any of the above embodiments, and therefore has all the beneficial effects of the push rod 100 in any of the above embodiments.

[0102] Specifically, this utility model proposes a hydraulic support 10 suitable for thin coal seam mining. The hydraulic support 10 includes a base 200, a top beam, a column, and a push rod 100 as described in any of the foregoing embodiments. The push rod 100 is horizontally disposed in the opening space of the base 200, its rear end is hinged to a pushing jack via a first connecting member 160, and its front end is connected to a scraper conveyor via a second connecting member 162.

[0103] In this embodiment, the push rod 100, as a key transmission component realizing the two core functions of pushing the conveyor and moving the support, features a thin, high-strength structure that allows the entire hydraulic support 10 to operate normally within the limited coal seam space. When the pushing jack extends, it pushes the push rod 100 forward, thereby pushing the scraper conveyor forward. When the pushing jack retracts, it pulls the push rod 100 backward, thereby pulling the entire hydraulic support 10 towards the coal face. The thin-designed push rod 100 significantly reduces the overall height of the hydraulic support 10, enabling it to adapt to the mining requirements of thin coal seams. The three-layer composite structure and reinforced design of the push rod 100 ensure sufficient load-bearing capacity within a limited space, capable of withstanding the enormous loads during pushing and moving the support.

[0104] In the claims, description, and accompanying drawings of this utility model, the term "plural" refers to two or more objects. 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 this utility model and simplifying the description 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 limitations on this utility model. The terms "connect," "install," "fix," etc., should be interpreted broadly. For example, "connect" 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 utility model can be understood based on the specific circumstances described above.

[0105] In the claims, description, and drawings of this utility model, 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 this utility model. In the claims, description, and drawings of this utility model, the 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.

[0106] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A push rod, characterized in that, A pushing device for connecting a conveyor and a hydraulic support, the push rod comprising: The body includes a base plate, a connecting plate, and a cover plate; Along the thickness direction of the body, the cover plate, the connecting plate, and the bottom plate are stacked and distributed, with at least a portion of the connecting plate and the bottom plate being attached to each other, and at least a portion of the connecting plate and the cover plate being attached to each other. A first connector is disposed at one end of the main body, located on the base plate, and is used to connect with the pushing device; The second connector is located at the other end of the main body, on the base plate, and is used to connect with the conveyor.

2. The push rod according to claim 1, characterized in that, The connecting plate is partially attached to the base plate, and along the length of the body, the distance between the connecting plate and the second connecting member is less than the distance between the connecting plate and the first connecting member.

3. The push rod according to claim 2, characterized in that, The cover plate includes: A first plate is disposed on the connecting plate, wherein the first plate, the connecting plate, and the base plate form a three-layer stacked structure; The second plate has one end connected to the first plate and extends from the connection point with the first plate toward the base plate. A portion of the second plate is attached to the base plate to form a two-layer superimposed structure.

4. The push rod according to claim 3, characterized in that, The second plate includes: The first transition section has one end connected to the first plate and extends inclined towards the bottom plate; The first straight plate segment is connected to the other end of the first transition segment, and the first straight plate segment is attached and fixed to the base plate; The push rod also includes: A first reinforcing structure, one side of which is connected to the first transition section, and the other side of which is connected to the base plate.

5. The push rod according to claim 4, characterized in that, The base plate is provided with a waste rock discharge hole, which is used to allow waste rock to fall. The first straight section is provided with an avoidance notch, which is provided above the waste rock discharge hole and corresponds to the waste rock discharge hole, and is connected to the waste rock discharge hole.

6. The push rod according to claim 3, characterized in that, The first plate includes: The second straight plate segment is fixedly connected to the connecting plate and is arranged parallel to the connecting plate; The second transition section has one end connected to the second straight plate section, and the second transition section extends from the connection point with the second straight plate section in a direction away from the connecting plate. The third straight section is connected to the other end of the second transition section and is arranged parallel to the base plate; Along the thickness direction of the body, the third straight plate segment is located above the base plate, and an installation space is formed between the third straight plate segment and the base plate, with the second connector located within the installation space.

7. The push rod according to claim 6, characterized in that, The push rod also includes: The second reinforcing structure is disposed between the second transition section and the connecting plate.

8. The push rod according to claim 6, characterized in that, The push rod also includes: At least two side plates, a portion of the at least two side plates is connected to one side of the body, and another portion of the at least two side plates is connected to the other side of the body; The first cover plate is connected to at least two of the side plates and the third straight plate segment; The second cover plate is connected to at least two of the side plates and the bottom plate.

9. The push rod according to claim 8, characterized in that, The push rod also includes a limiting component; A limiting hole is provided on the side plate, the limiting member is embedded in the limiting hole, and a portion of the limiting member protrudes from the limiting hole and is located on the outside of the body.

10. A hydraulic support, characterized in that, include: The push rod as described in any one of claims 1 to 9.

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