Connecting device and fully mechanized coal face working system

Abstract

The utility model provides a kind of connecting device and fully mechanized coal face working system, wherein, connecting device is used to connect between hydraulic support and conveyer, and connecting device includes driving part, chain ring, connecting piece, first matching part and second matching part.Driving part includes fixed part and with fixed part connection, and the motion part that can be relative to fixed part motion, fixed part is used to be connected with hydraulic support;Chain ring is used to be connected with conveyer;Connecting piece is integrated structure, and one end of connecting piece is equipped with first connecting hole, and the other end of connecting piece is equipped with second connecting hole;First matching part is connected with motion part, and is arranged in first connecting hole, to make motion part and connecting piece connect;Second matching part is connected with chain ring, and is arranged in second connecting hole, to make chain ring and connecting piece connect.The utility model uses the connecting piece of integrated structure, effectively simplifies device structure, significantly improves the reliability and stability of connection.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and more specifically, to a connecting device and a fully mechanized mining face working system. Background Technology

[0002] In related technologies, in fully mechanized coal mining faces, hydraulic supports are typically connected to scraper conveyors via connecting devices to achieve the function of pushing the conveyor. Existing connecting devices generally include chain link boxes and chain link clips, etc. These connecting devices are assembled from multiple parts, resulting in a complex structure that is prone to interference with other equipment in the confined space underground, making them difficult to install and use. Utility Model Content

[0003] To solve at least one of the aforementioned technical problems, the first objective of this utility model is to provide a connecting device.

[0004] The second objective of this invention is to propose a fully mechanized mining face working system.

[0005] In view of the above, according to a first aspect of the present invention, a connecting device is provided for connecting a hydraulic support and a conveyor. The connecting device includes a driving component, a chain link, a connecting component, a first mating component, and a second mating component. The driving component includes a fixed part and a moving part connected to the fixed part and capable of moving relative to the fixed part. The fixed part is used to connect to the hydraulic support. The chain link is used to connect to the conveyor. The connecting component is an integral structure, with a first connecting hole at one end and a second connecting hole at the other end. The first mating component connects to the moving part and passes through the first connecting hole to connect the moving part to the connecting component. The second mating component connects to the chain link and passes through the second connecting hole to connect the chain link to the connecting component.

[0006] This utility model relates to a connection device for connecting a hydraulic support and a conveyor. The connection device specifically consists of a drive component, a chain link, a connector, a first mating component, and a second mating component. The drive component includes a fixed part and a moving part. The fixed part is used to hinge or fix to the hydraulic support, and the moving part can extend and retract relative to the fixed part to provide traction power. Specifically, the moving part can move linearly relative to the fixed part along the length of the drive component.

[0007] The chain link, as an end-connecting element, is used to directly connect to the lugs or similar connecting structures on the transport aircraft.

[0008] The connector is the core component of the connecting device proposed in this utility model. The connector is an integral structure, specifically a rigid component manufactured as a single piece. By making the connector an integral structure, this utility model provides the connector with good structural strength and rigidity, while maintaining low structural complexity. One end of the connector has a first connecting hole, and the other end has a second connecting hole.

[0009] The first mating member is used to connect the moving part and the connecting member. It passes through the first connecting hole and is connected to the moving part. The second mating member is used to connect the chain link and the connecting member. It passes through the second connecting hole and is connected to the chain link.

[0010] In this invention, the moving part of the drive component is connected to the first connecting hole of the connector via a first mating part, and the chain link is connected to the second connecting hole of the connector via a second mating part, thereby establishing a complete force transmission path between the drive component, the connector, and the chain link. During operation, the moving part of the drive component extends or retracts, transmitting force to the connector via the first mating part, and then the connector applies force to the chain link via the second mating part, ultimately driving the conveyor to move accordingly.

[0011] This utility model adopts an integrated connector to replace the traditional multi-part assembly structure, which effectively simplifies the device construction, reduces structural complexity, avoids left and right squeezing and jamming failures caused by the gaps between multiple parts, and significantly improves the reliability and stability of the connection. This utility model also reduces the overall volume of the connecting device to a certain extent, making it easier to install and maintain in narrow underground spaces.

[0012] Furthermore, this invention, through its integrated structural design, fundamentally eliminates the connection weaknesses and stress concentration areas present in traditional multi-component assembly structures. When the connector is under stress, the load can be transmitted evenly and continuously along its own structure, avoiding the problems of excessive local stress, loose connections, or deformation failures caused by traditional chain link boxes and chain link clips. This significantly improves the load-bearing capacity and durability of the entire connection device, enabling it to withstand frequent, high-intensity traction operations in fully mechanized mining faces.

[0013] In some technical solutions of this utility model, optionally, the first mating part is a first pin; the end of the moving part is provided with a protrusion, and a third connecting hole is provided on the protrusion; the first pin passes through the first connecting hole and the third connecting hole.

[0014] In some technical solutions of this utility model, optionally, the hole walls of the first connecting hole and / or the third connecting hole are provided with internal threads; the first pin is provided with external threads that cooperate with the internal threads.

[0015] In some technical solutions of this utility model, the second mating component is optionally a second pin; the chain link has a chain link hole, and the second pin passes through the second connecting hole and the chain link hole.

[0016] In some technical solutions of this utility model, optionally, the first mating part is a first rivet, the rivet shank of the first rivet passing through the moving part and the first connecting hole; and / or the second mating part is a second rivet, the rivet shank of the second rivet passing through the chain link and the second connecting hole.

[0017] In some technical solutions of this utility model, optionally, the connector includes two parallel extension sections and a reinforcing section perpendicularly connected between the two extension sections; the number of first connecting holes is two, with one first connecting hole provided on each extension section, and the axes of the two first connecting holes coincide; the number of second connecting holes is two, with one second connecting hole provided on each extension section, and the axes of the two second connecting holes coincide.

[0018] In some technical solutions of this utility model, optionally, the connector includes two intersecting extension sections; the number of first connecting holes is two, with one first connecting hole provided on each extension section, and the axes of the two first connecting holes coincide; the number of second connecting holes is two, with one second connecting hole provided on each extension section, and the axes of the two second connecting holes coincide.

[0019] In some technical solutions of this utility model, optionally, the driving component is a hydraulic cylinder, the fixed part is the cylinder body of the hydraulic cylinder, and the moving part is the piston rod of the hydraulic cylinder.

[0020] In some technical solutions of this utility model, optionally, the driving component is an electric push rod, the fixed part is the housing of the electric push rod, and the moving part is the push rod of the electric push rod.

[0021] According to the second objective of this utility model, this utility model proposes a fully mechanized mining face working system, which includes a hydraulic support; a conveyor; and a connecting device as described in any of the above technical solutions; wherein the fixed part of the driving component is connected to the hydraulic support, and the chain link is connected to the conveyor.

[0022] The fully mechanized mining face working system proposed in this utility model includes the connecting device as described in any of the above technical solutions, and therefore has all the beneficial effects of the connecting device in any of the above technical solutions, which will not be repeated here.

[0023] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this 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 connecting device in an embodiment of this utility model is shown; Figure 2 The second schematic diagram of the connecting device in an embodiment of this utility model is shown; Figure 3 One of the structural schematic diagrams of the connector in an embodiment of this utility model is shown; Figure 4 The second schematic diagram of the connector in an embodiment of this utility model is shown; Figure 5 A schematic diagram of the hydraulic cylinder in an embodiment of this utility model is shown.

[0025] Figure label: 100 Connecting device, 110 Driving component, 112 Fixing part, 114 Cylinder body, 116 Moving part, 118 Protrusion, 122 Piston rod, 124 Hydraulic cylinder, 130 Chain link, 132 Chain link hole, 134 Chain link, 140 Connecting component, 142 First connecting hole, 144 Second connecting hole, 146 Extension section, 147 Opening, 148 Reinforcing section, 150 First mating part, 160 Second mating part. 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 and features described in these embodiments 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] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in an embodiment of this utility model, a connecting device 100 is proposed. The connecting device 100 is used to connect the hydraulic support and the transport machine. The connecting device 100 includes a driving component 110, a chain link 130, a connecting component 140, a first mating component 150, and a second mating component 160. The drive component 110 includes a fixed part 112 and a moving part 116 connected to the fixed part 112 and movable relative to the fixed part 112. The fixed part 112 is used to connect to a hydraulic support. The chain link 130 is used to connect to a conveyor. The connector 140 is an integral structure, and one end of the connector 140 has a first connecting hole 142, and the other end of the connector 140 has a second connecting hole 144. The first mating part 150 is connected to the moving part 116 and passes through the first connecting hole 142 so that the moving part 116 is connected to the connector 140. The second mating part 160 is connected to the chain link 130 and passes through the second connecting hole 144 so that the chain link 130 is connected to the connector 140.

[0029] In this embodiment, the present invention relates to a connecting device 100 for connecting a hydraulic support and a transport machine. The connecting device 100 specifically comprises a driving member 110, a chain link 130, a connecting member 140, a first mating member 150, and a second mating member 160. The driving member 110 includes a fixed part 112 and a moving part 116. The fixed part 112 is used to hinge or fix to the hydraulic support, and the moving part 116 can extend and retract relative to the fixed part 112 to provide traction power. Specifically, the moving part 116 can move linearly relative to the fixed part 112 along the length direction of the driving member 110.

[0030] Link 130 serves as an end-connecting element, used for direct connection to ear plates or similar connecting structures on the transport aircraft.

[0031] The connector 140 is the core component of the connecting device 100 proposed in this utility model. The connector 140 is an integral structure, specifically a rigid component manufactured as a single piece. By making the connector 140 an integral structure, this utility model provides the connector 140 with good structural strength and rigidity, and low structural complexity. One end of the connector 140 is provided with a first connecting hole 142, and the other end of the connector 140 is provided with a second connecting hole 144.

[0032] The first mating member 150 is used to connect the moving part 116 and the connecting member 140. It passes through the first connecting hole 142 and is connected to the moving part 116. The second mating member 160 is used to connect the chain link 130 and the connecting member 140. It passes through the second connecting hole 144 and is connected to the chain link 130.

[0033] In this invention, the moving part 116 of the drive member 110 is connected to the first connecting hole 142 of the connector 140 via the first mating part 150, and the chain link 130 is connected to the second connecting hole 144 of the connector 140 via the second mating part 160, thereby establishing a complete force transmission path between the drive member 110, the connector 140, and the chain link 130. During operation, the moving part 116 of the drive member 110 extends or retracts, transmitting force to the connector 140 via the first mating part 150. The connector 140 then applies force to the chain link 130 via the second mating part 160, ultimately driving the transport machine to move accordingly.

[0034] This utility model adopts an integrated connector 140 to replace the traditional multi-part assembly structure, which effectively simplifies the device structure, reduces the structural complexity, avoids left and right squeezing and jamming failures caused by the gaps in the assembly of multiple parts, and significantly improves the reliability and stability of the connection. This utility model reduces the overall volume of the connecting device 100 to a certain extent, making it easier to install and maintain in narrow underground spaces.

[0035] Furthermore, this utility model, through its integrated structural design, fundamentally eliminates the connection weaknesses and stress concentration areas present in traditional multi-component assembly structures. When the connector 140 is under stress, the load can be transmitted evenly and continuously along its own structure, avoiding the problems of excessive local stress, loose connections, or deformation failures caused by traditional chain link boxes and chain link clips. This significantly improves the load-bearing capacity and durability of the entire connecting device 100, enabling it to withstand frequent, high-intensity traction operations in fully mechanized mining faces.

[0036] Specifically, such as Figure 3 As shown, one end of the connector 140 has a first connecting hole 142, and the other end has a second connecting hole 144. Specifically, this refers to the connector 140 having a second connecting hole 144 along its length (e.g., ...). Figure 3 (In the direction indicated by arrow A in the image) at both ends.

[0037] Specifically, the connector 140 has a first end and a second end, wherein the first end and the second end are two opposite ends of the connector 140 in the length direction, a first connecting hole 142 is opened at the first end, and a second connecting hole 144 is opened at the second end.

[0038] Specifically, the first connecting hole 142 and the second connecting hole 144 have the same diameter, so that the first mating part 150 and the second mating part 160 can use mating parts of the same size and can be interchanged, which improves the practicality of the connecting device 100.

[0039] Specifically, the connector 140 can be designed with a streamlined profile that is wide in the middle and narrow at both ends. Without significantly increasing the weight and material usage, the bending and torsional stiffness of the connector 140 can be greatly improved by changing the force flow distribution and increasing the structural moment of inertia.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, optionally, the first mating part 150 is a first pin; the end of the moving part 116 is provided with a protrusion 118, and a third connecting hole is provided on the protrusion 118; the first pin passes through the first connecting hole 142 and the third connecting hole.

[0041] In this embodiment, the connection structure is described, wherein a protrusion 118 is formed at the end of the moving part 116 of the drive member 110, and a third connecting hole is formed on the protrusion 118. The first mating member 150 is a first pin, which passes through both the first connecting hole 142 on the connector 140 and the third connecting hole on the protrusion 118, thereby realizing the hinge connection of the three.

[0042] In this invention, by directly designing a protrusion 118 and opening a connection hole at the end of the moving part 116, an additional connecting block or transition joint is eliminated, making the connection structure between the driving member 110 and the connecting member 140 non-compact, effectively reducing the radial and axial dimensions of the device.

[0043] The first pin passes through both components, forming a stable connection structure that can distribute the load more evenly, greatly improving the bending and shear resistance of the connection point. This avoids loosening or damage to the connection under heavy loads and impact loads, ensuring smooth and reliable power transmission.

[0044] Specifically, the first pin can be a stepped shaft structure, meaning that the diameter of the middle section of the first pin is clearance-fitted with the connecting holes at both ends, while the two ends of the first pin form shoulders with larger diameters. These shoulders can serve as axial positioning, effectively preventing unnecessary axial movement of the first pin within the holes, thus improving the stability and safety of the connection.

[0045] Specifically, a self-lubricating bushing or a wear-resistant gasket is provided between the contact interface of the protrusion 118 and the connector 140. The self-lubricating bushing can be pressed into the first connecting hole 142 to form a friction pair with the first pin, thereby significantly reducing wear and maintenance requirements. The wear-resistant gasket can be used to adjust the clearance and withstand wear, extending the overall service life.

[0046] For example, the diameter of the third connecting hole is the same as the diameter of the first connecting hole 142, so that the first pin can achieve a stable connection after insertion.

[0047] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, optionally, the second mating part 160 is a second pin; the chain link 130 has a chain link hole 132, and the second pin passes through the second connecting hole 144 and the chain link hole 132.

[0048] In this embodiment, the connection method at the other end of the connector 140 is designed, wherein the second mating part 160 is a second pin, and the chain link 130 has a chain link hole 132. The second pin passes through the second connecting hole 144 and the chain link hole 132. This utility model utilizes the inherent, unmodified standard chain link hole 132 on the chain link 130 for connection. This means that this utility model does not require any structural processing or special customization of the existing standard chain link 130, and is directly compatible with various specifications of chain links 130 on the market, greatly expanding the applicability of the device and reducing manufacturing and maintenance costs.

[0049] Specifically, such as Figure 1 As shown, the chain link 130 includes multiple chain links 134, each chain link 134 having a chain link hole 132. Through the chain link hole 132, the multiple chain links 130 are interlocked and connected. The chain link hole 132 of the chain link 134 at one end is penetrated by a second pin, and the chain link hole 132 of the chain link 134 at the other end can be used to connect with a transport machine.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, optionally, both ends of the connector 140 adopt a highly efficient and reliable pin connection scheme. Specifically, the protrusion 118 at the end of the moving part 116 of the drive member 110 and its third connecting hole are hinged to the first connecting hole 142 of the connector 140 through the first pin. At the same time, the chain link 130 uses its own standard chain link hole 132 to directly hinge to the second connecting hole 144 of the connector 140 through the second pin.

[0051] In some embodiments of this utility model, optionally, the walls of the first connecting hole 142 and / or the third connecting hole are provided with internal threads; the first pin is provided with external threads that mate with the internal threads.

[0052] In this embodiment, the third connecting hole on the protrusion 118 of the moving part 116 is a smooth through hole, while the first connecting hole 142 on the connector 140 is an internally threaded hole. The first pin can be considered as a screw with an external thread at one end. During installation, the screw passes through the smooth third connecting hole and is then screwed into the threaded first connecting hole 142 and tightened. In this case, tightening can be completed simply by tightening from one side, making installation convenient. The preload mainly acts on the connector 140, which allows the connector 140 to fit tightly against the protrusion 118 of the moving part 116, eliminating gaps and improving connection rigidity.

[0053] On the other hand, the first connecting hole 142 on the connector 140 is a smooth through hole, while the third connecting hole on the protrusion 118 is an internally threaded hole, and the first pin is also a screw with an external thread at one end. During installation, the screw passes through the first connecting hole 142, which is a smooth hole, and then screws into the third connecting hole, which is a threaded hole, and tightens it.

[0054] Furthermore, both the first connecting hole 142 on the connector 140 and the third connecting hole on the protrusion 118 of the moving part 116 are internally threaded holes. The first pin is machined with external threads. During installation, the first pin is first screwed into one of the threaded holes, then the protrusion 118 of the moving part 116 is aligned, and the first pin is screwed into the other threaded hole. The threaded pair is distributed across the two components, sharing the load and relatively reducing the strength requirement for a single threaded hole.

[0055] In some embodiments of this utility model, optionally, the first mating part 150 is a first rivet, the rivet shank of the first rivet passing through the moving part 116 and the first connecting hole 142; and / or the second mating part 160 is a second rivet, the rivet shank of the second rivet passing through the chain link 130 and the second connecting hole 144.

[0056] In this embodiment, on one hand, the first mating part 150 is a first rivet, and the moving part 116 and the connecting part 140 are riveted together. Specifically, the rivet shank of the first rivet passes through the moving part 116 of the driving part 110 and the first connecting hole 142 of the connecting part 140 to form a fixed connection.

[0057] On the other hand, the second mating part 160 is the second rivet, and the chain link 130 and the connector 140 are riveted together. Specifically, the rivet shank of the second rivet passes through the second connecting hole 144 of the chain link 130 and the connector 140. This structure ensures that the connection with the chain link 130 is stable and is suitable for working conditions where the chain link 130 needs to withstand huge and directional impact loads, and can effectively prevent fatigue failure of the connection point.

[0058] On the other hand, both the first mating part 150 and the second mating part 160 are rivets. When both ends are connected by rivets, the entire connecting device 100 is integrated into a nearly monolithic rigid structure. This structure provides strong connection rigidity and integrity, and can withstand harsh loads and vibration environments.

[0059] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of this utility model, optionally, the connector 140 includes two parallel extension segments 146 and a reinforcing segment 148 perpendicularly connected between the two extension segments 146; the number of first connecting holes 142 is two, with one first connecting hole 142 provided on each extension segment 146, and the axes of the two first connecting holes 142 coincide; the number of second connecting holes 144 is two, with one second connecting hole 144 provided on each extension segment 146, and the axes of the two second connecting holes 144 coincide.

[0060] In this embodiment, the connector 140 includes two parallel extension sections 146 and a reinforcing section 148 perpendicularly connected between the two extension sections 146. The connector 140 has an H-shaped structure. The two parallel extension sections 146 provide a stable and symmetrical force transmission path, while the vertical reinforcing section 148 significantly enhances the overall bending stiffness and stability. The two coincident first connecting holes 142 and second connecting holes 144 form a double shear support, resulting in better stress conditions for the first mating part 150 and the second mating part 160.

[0061] Specifically, the connector 140 is an integral H-shaped frame structure consisting of two parallel extension sections 146 and a reinforcing section 148 vertically connecting the two. It should be emphasized that the extension sections 146 and the reinforcing section 148 refer to the different parts that make up the connector 140, which are its extended forms in space. Together they form an indivisible single whole, rather than a simple stack of multiple independent parts.

[0062] For example, the aforementioned integrated structure can be achieved through the following manufacturing methods: First, integral casting, where a complete H-shaped connector 140 blank is directly obtained through casting, and then the connecting holes are machined. Second, welding, where two pre-cut parallel extension sections 146 and a reinforcing section 148 can be permanently connected into a whole through continuous welds. The welded H-shaped structure also possesses high strength and integrity.

[0063] Specifically, such as Figure 4As shown, an opening 147 is formed between the two extension segments 146. During connection, the protrusion 118 at the end of the moving part 116 is precisely inserted and accommodated within the opening 147 formed between the two extension segments 146. At this time, the third connecting hole on the protrusion 118 is aligned with the two coaxial first connecting holes 142 on the two extension segments 146. Subsequently, the first pin passes sequentially through the first connecting hole 142 of one extension segment 146, the third connecting hole of the protrusion 118, and the first connecting hole 142 of the other extension segment 146, thereby hinged the moving part 116 of the drive member 110 to the connector 140.

[0064] One link 134 at the end of the link 130 is also embedded and accommodated in an opening 147 formed by two extensions 146 at the other end of the connector 140. The inner cavity of this link 134 itself constitutes a link hole 132. This link hole 132 is aligned with two coaxial second connecting holes 144 on the two extensions 146. Then, a second pin passes sequentially through the second connecting hole 144 of one extension 146, the link hole 132 of the link 134, and the second connecting hole 144 of the other extension 146, thereby hinged the link 130 to the connector 140.

[0065] Through the above design, this utility model enables each end of the connector 140 to be clamped between two parallel extensions 146 from both sides, thus transforming the single-sided cantilever force of the pin shaft into a stable double shear force mode. This greatly improves the bending and shear resistance of the connection point and avoids possible deflection and deformation in single-plate connections. All hinge points are compactly integrated within the opening 147 of the H-shaped frame, resulting in a strong overall structure that effectively limits the displacement of components in the direction perpendicular to the pin shaft axis, fundamentally eliminating the fault of lateral compression.

[0066] Specifically, the openings 147 formed at both ends of the connector 140 can be of different sizes, with one end's opening 147 being larger than the other end's, thus forming an X-shaped structure. The protrusion 118 at the end of the moving part 116 is accommodated within the larger opening 147 in the X-shaped structure. The larger opening 147 provides ample space for the drive connector and its movement. One link 134 at the end of the chain link 130 is accommodated within the smaller opening 147 on the other side of the X-shaped structure. The smaller opening 147 can more tightly constrain the chain link 130, reducing its movement allowance and enhancing connection stability.

[0067] In some embodiments of this utility model, optionally, the connector 140 includes two intersecting extension segments 146; the number of first connecting holes 142 is two, with one first connecting hole 142 provided on each extension segment 146, and the axes of the two first connecting holes 142 coincide; the number of second connecting holes 144 is two, with one second connecting hole 144 provided on each extension segment 146, and the axes of the two second connecting holes 144 coincide.

[0068] In this embodiment, the connector 140 is X-shaped, and the two intersecting extensions 146 form an inherent triangular stabilizing structure. This design ensures tensile strength while giving the connector 140 excellent torsional resistance, effectively coping with complex multidimensional loads that may occur during operation. The coaxial connecting hole also ensures a reliable connection.

[0069] like Figure 5 As shown, in some embodiments of this utility model, optionally, the driving component 110 is a hydraulic cylinder 124, the fixing part 112 is the cylinder body 114 of the hydraulic cylinder 124, and the moving part 116 is the piston rod 122 of the hydraulic cylinder 124.

[0070] In this embodiment, the driving component 110 is specifically a hydraulic cylinder 124, wherein the fixed part 112 is the cylinder body 114 of the hydraulic cylinder 124, and the moving part 116 is the piston rod 122 of the hydraulic cylinder 124. The cylinder body 114 of the hydraulic cylinder 124 is hinged to the base of the hydraulic support through an external support or trunnion, while the end of the piston rod 122 is hinged to the first connecting part of the connecting member 140 through a first mating part 150.

[0071] When high-pressure hydraulic oil enters the rodless chamber of cylinder 114, it pushes the piston rod 122 to extend. When it enters the rod chamber, the piston rod 122 retracts. Through the connecting piece 140 and the chain link 130, the traction or thrust is directly applied to the conveyor, thereby achieving its precise movement. This utility model sets the drive component 110 as a hydraulic cylinder 124, which can provide huge linear thrust through hydraulic transmission, with smooth operation and strong overload resistance.

[0072] Specifically, a multi-stage telescopic hydraulic cylinder 124 can be used as the moving part 116. In situations where installation space is limited, a longer working stroke can be achieved with a shorter installation length, greatly improving the spatial adaptability of the device.

[0073] Specifically, a built-in displacement sensor is integrated inside the hydraulic cylinder 124 to monitor the extension length and movement speed of the piston rod 122 in real time and provide key data feedback for achieving precise automated control of the transport aircraft's pushing position.

[0074] Specifically, the drive unit 110 can be a jack.

[0075] In some embodiments of this utility model, optionally, the driving member 110 is an electric push rod, the fixing part 112 is the housing of the electric push rod, and the moving part 116 is the push rod of the electric push rod.

[0076] In this embodiment, the drive component 110 is an electric push rod, wherein the housing serves as the fixed part 112 and the push rod serves as the moving part 116. Electric drive has the advantages of precise control, fast response, easy automation control and remote operation, and high energy transfer efficiency, eliminating the need for a complex hydraulic pipeline system and simplifying maintenance.

[0077] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of this utility model, a connecting device 100 is proposed. The connecting device 100 is specifically a hydraulic support pull-back sliding device, the driving component 110 is a pull-back sliding jack, the connecting component 140 is an adapter, and the first mating component 150 and the second mating component 160 are adapter pins.

[0078] In this embodiment, the hydraulic support is a support device for fully mechanized coal mining. Its main function is to support the roof of the mining area, maintain the working space of equipment such as the coal mining machine and scraper conveyor, and move forward with the mining and transportation equipment in the working face. The low-level top-coal caving hydraulic support is equipped with scraper conveyors at the front and rear, and coal is discharged through a coal discharge mechanism at the rear end, realizing integrated coal mining. The pull-back sliding device of the top-coal caving hydraulic support is an auxiliary mechanism for the operation of this type of support. This utility model discloses a hydraulic support pull-back sliding device, comprising: a pull-back sliding jack, an adapter, an adapter pin, and a chain link 130. One end of the pull-back sliding jack is connected to the base of the hydraulic support (not shown in the figure), and the other end is connected to one end of the adapter via the adapter pin. The other end of the adapter is connected to the chain link 130 via another adapter pin. The chain link 130 is connected to the conveyor ear plate (not shown in the figure). The pull-back sliding jack can extend and retract freely. When retracted, it pulls the conveyor to move through the adapter pin, connecting piece 140, and chain link 130, thereby completing one work cycle. This utility model uses a small-sized, high-strength adapter instead of the chain link box and chain link clamp structure in the prior art, reducing the left and right squeezing failure of the pull-back sliding device and maintaining reliability.

[0079] In some embodiments of this utility model, a fully mechanized mining face working system is proposed, which includes a hydraulic support; a conveyor; and a connecting device 100 as described in any of the above embodiments; wherein the fixing part 112 of the driving member 110 is connected to the hydraulic support, and the chain link 130 is connected to the conveyor.

[0080] In this embodiment, the fully mechanized mining face working system proposed in this application includes the connecting device 100 in any of the aforementioned embodiments, thus forming an efficient and reliable linkage mechanism between the hydraulic support, the connecting device 100, and the conveyor. The connecting device 100 acts as a bridge, with its driving member 110's fixed part 112 hinged to the base of the hydraulic support, and its chain link 130's free end connected to the ear plate or similar connecting structure on the conveyor. Power provided by the hydraulic support is transmitted through the connecting device 100 to achieve the overall pushing of the conveyor. When the hydraulic support moves forward according to the coal mining process requirements, its control system provides power to the driving member 110 of the connecting device 100. The driving member 110 retracts, and through the robust connecting member 140 and chain link 130, powerfully and smoothly pulls the heavy conveyor towards the coal face, preparing for the next coal mining cycle. Because the connecting device 100 has a compact structure, high strength, and good reliability, the entire pushing process has a low failure rate and precise operation, effectively ensuring continuous, efficient, and safe production of the fully mechanized mining face.

[0081] Specifically, a fully mechanized longwall mining face system can be either a fully mechanized top coal caving longwall mining face system or a thin coal seam fully mechanized longwall mining face system.

[0082] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0083] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, 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.

[0084] 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 connecting device (100), characterized in that, For connecting the hydraulic support and the transport machine, the connecting device (100) includes: The drive unit (110) includes a fixed part (112) and a moving part (116) connected to the fixed part (112) and capable of moving relative to the fixed part (112), wherein the fixed part (112) is used to connect to the hydraulic support; Link (130), the link (130) being used for connection with the transport aircraft; The connector (140) is an integral structure, and one end of the connector (140) is provided with a first connection hole (142), and the other end of the connector (140) is provided with a second connection hole (144). The first mating part (150) is connected to the moving part (116) and passes through the first connecting hole (142) so that the moving part (116) is connected to the connecting part (140); The second mating part (160) is connected to the chain link (130) and passes through the second connecting hole (144) so ​​that the chain link (130) is connected to the connecting part (140).

2. The connecting device (100) according to claim 1, characterized in that, The first mating part (150) is the first pin; The end of the moving part (116) is provided with a protrusion (118), and a third connecting hole is provided on the protrusion (118); The first pin passes through the first connecting hole (142) and the third connecting hole.

3. The connecting device (100) according to claim 2, characterized in that, The walls of the first connecting hole (142) and / or the third connecting hole are provided with internal threads; The first pin is provided with an external thread that mates with the internal thread.

4. The connecting device (100) according to claim 1, characterized in that, The second mating part (160) is the second pin; The chain link (130) has a chain link hole (132), and the second pin passes through the second connecting hole (144) and the chain link hole (132).

5. The connecting device (100) according to claim 1, characterized in that, The first mating part (150) is a first rivet, the rivet shank of the first rivet passing through the moving part (116) and the first connecting hole (142); and / or The second mating part (160) is a second rivet, and the rivet shank of the second rivet passes through the chain link (130) and the second connecting hole (144).

6. The connecting device (100) according to any one of claims 1 to 5, characterized in that, The connector (140) includes two parallel extension sections (146) and a reinforcing section (148) that is perpendicularly connected between the two extension sections (146). The number of the first connecting holes (142) is two, and each of the extension segments (146) is provided with one first connecting hole (142), and the axes of the two first connecting holes (142) coincide; The number of the second connecting holes (144) is two, and each of the extension segments (146) is provided with one second connecting hole (144), and the axes of the two second connecting holes (144) coincide.

7. The connecting device (100) according to any one of claims 1 to 5, characterized in that, The connector (140) includes two intersecting extensions (146). The number of the first connecting holes (142) is two, and each of the extension segments (146) is provided with one first connecting hole (142), and the axes of the two first connecting holes (142) coincide; The number of the second connecting holes (144) is two, and each of the extension segments (146) is provided with one second connecting hole (144), and the axes of the two second connecting holes (144) coincide.

8. The connecting device (100) according to any one of claims 1 to 5, characterized in that, The driving component (110) is a hydraulic cylinder (124), the fixing part (112) is the cylinder body (114) of the hydraulic cylinder (124), and the moving part (116) is the piston rod (122) of the hydraulic cylinder (124).

9. The connecting device (100) according to any one of claims 1 to 5, characterized in that, The driving component (110) is an electric push rod, the fixing part (112) is the housing of the electric push rod, and the moving part (116) is the push rod of the electric push rod.

10. A fully mechanized mining face working system, characterized in that, include: Hydraulic supports; Transport aircraft; The connecting device (100) as described in any one of claims 1 to 9; The fixing part (112) of the drive component (110) is connected to the hydraulic support, and the chain link (130) is connected to the transport machine.

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