Belt self-moving tail with crawling pushing system

Abstract

The application discloses a crawling pushing system for a belt self-moving tail, which comprises a guide rail fixed to the top of the belt self-moving tail along the length direction of the belt self-moving tail, a scraper conveyor and a crawling support seat movably loaded on the guide rail along the length direction of the guide rail, and a pushing oil cylinder arranged at one end of the scraper conveyor close to the crawling support seat; the top surface of the guide rail is provided with continuously distributed limiting teeth; the crawling support seat is located on the advancing direction side of the scraper conveyor, and one end of the crawling support seat away from the scraper conveyor is rotatably connected with a tongue plate used for switching between a lifted state and a lowered state; the driving end of the pushing oil cylinder is connected with the crawling support seat; when the tongue plate is in the lowered state, the tongue plate and the limiting teeth form one-way clamping, so that the crawling support seat, the guide rail and the belt self-moving tail are pushed to move in the advancing direction relative to the scraper conveyor through the elongation of the driving end of the pushing oil cylinder under the condition that the scraper conveyor remains stationary.

Description

Technical Field

[0001] This application belongs to the field of mining machinery technology, specifically relating to a crawling and pushing system for the tail of a belt conveyor. Background Technology

[0002] The self-moving tail section of the belt conveyor is a key component of the belt conveyor in a fully mechanized coal mining face. It is mainly used to realize the automated movement and position adjustment of the tail section of the belt conveyor to adapt to the advancement needs of the working face and ensure efficient docking and collaborative operation with equipment such as scraper conveyors.

[0003] However, traditional belt-driven self-propelled tail conveyor systems have many shortcomings in practical applications. On the one hand, some systems employ complex structural designs, requiring the coordinated operation of multiple external auxiliary devices to move the tail section. This not only increases equipment purchase costs and maintenance difficulty but also makes the operation process cumbersome, requiring a significant investment of manpower and time, severely impacting the production efficiency of the fully mechanized mining face. On the other hand, existing systems also have certain deficiencies in stability and reliability. Due to the lack of effective limiting and guiding mechanisms during movement, the belt-driven self-propelled tail section is prone to deviation and swaying, leading to reduced docking accuracy with equipment such as scraper conveyors. This can even cause equipment failures and safety accidents, posing a significant threat to safe production in coal mines. Utility Model Content

[0004] In view of this, this application provides a crawling and pushing system for the tail of a self-propelled belt conveyor, the main purpose of which is to achieve efficient, stable and reliable automated movement and position adjustment of the tail of the self-propelled belt conveyor, thereby improving the production efficiency and safety level of the fully mechanized coal mining face.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a crawling and pushing system for the tail section of a belt-driven self-moving machine, comprising: A guide rail is fixed to the top of the belt self-moving machine tail along the length direction of the belt self-moving machine tail, and the top surface of the guide rail is provided with continuously distributed limiting teeth. A scraper conveyor is movably mounted on the guide rail along the length of the guide rail; A crawling support is movably disposed on the guide rail along the length of the guide rail and located on the forward direction side of the scraper conveyor; a tongue plate is rotatably connected to the end of the crawling support away from the scraper conveyor, and the tongue plate is used to switch between a raised state and a lowered state. A push cylinder is disposed at one end of the scraper conveyor near the crawling support, and the drive end of the push cylinder is connected to the crawling support. When the tongue plate is in the raised state, it disengages from the limiting teeth of the guide rail, allowing the scraper conveyor to move forward along the guide rail. When the tongue plate is in the lowered state, it engages with the limiting teeth of the guide rail in one direction, allowing it to swing only in the opposite direction of the forward movement. This allows the crawling support, the guide rail, and the belt self-moving tail to move relative to the scraper conveyor in the forward movement direction while the scraper conveyor remains stationary, through the extension of the drive end of the pushing cylinder.

[0006] Optionally, the tongue plate includes a first protrusion and a second protrusion; the first protrusion is used to form a rotatable connection point with the crawling support, so that the tongue plate can switch between the raised state and the lowered state around the rotatable connection point; the second protrusion is used to form a detachable connection with the crawling support when the tongue plate is in the raised state, so as to fix the tongue plate in the raised position and keep the tongue plate out of contact with the limiting teeth of the guide rail; when the connection between the second protrusion and the crawling support is released, the tongue plate can rotate around the rotatable connection point to the lowered state, so that the tongue plate and the limiting teeth of the guide rail form a one-way engagement.

[0007] Optionally, the limiting tooth on the top surface of the guide rail has a first tooth surface facing the forward direction and a second tooth surface facing the opposite direction of the forward direction, both the first tooth surface and the second tooth surface being inclined surfaces facing the opposite direction of the forward direction; when the tongue plate is in the lowered state, the tongue plate can form a stop engagement with the second tooth surface of the limiting tooth and can slide along the first tooth surface.

[0008] Optionally, the tilt angle of the first tooth surface is greater than the tilt angle of the second tooth surface.

[0009] Optionally, the moving path of the scraper conveyor on the guide rail includes a first limit position and a second limit position. When the scraper conveyor is at the first limit position, the tongue plate switches to the raised state, and the scraper conveyor can move from the first limit position to the second limit position. When the scraper conveyor moves to the second limit position, the tongue plate switches to the lowered state, and the crawling support, the guide rail, and the belt self-moving tail can move relative to the scraper conveyor in the forward direction under the action of the pushing cylinder.

[0010] Optionally, the self-moving belt tail crawling and pushing system further includes: The first lifting cylinder is fixed relative to the guide rail. The position of the first lifting cylinder corresponds to the position of the tongue plate when the scraper conveyor is in the first extreme position in the guide rail. The first lifting cylinder is used to drive the tongue plate to rotate to the lifted position when the scraper conveyor is in the first extreme position.

[0011] Optionally, the self-moving belt tail crawling and pushing system further includes: The second lifting cylinder is fixed relative to the guide rail. The position of the second lifting cylinder corresponds to the position of the tongue plate when the scraper conveyor is in the second extreme position in the guide rail. The second lifting cylinder is used to support the tongue plate when the scraper conveyor is in the second extreme position and the tongue plate is in the raised state.

[0012] Optionally, a force-bearing component is detachably provided on the tongue plate. The force-bearing component is used to cooperate with the first lifting cylinder and the second lifting cylinder. The driving ends of the first lifting cylinder and the second lifting cylinder act on the force-bearing component.

[0013] Optionally, the crawling support base has bending plates arranged opposite to each other on both sides. The bending plate includes a vertical section connected to the crawling support base and a transverse section that bends and extends from the vertical section toward the guide rail. The transverse section is located on the side of the guide rail away from the crawling support base.

[0014] Optionally, the bottom of the crawling support is rotatably provided with a roller, which makes rolling contact with the top surface of the guide rail.

[0015] By employing the above technical solution, this application has at least the following beneficial effects: The self-propelled belt conveyor tail section crawling and pushing system provided in this application can move the self-propelled belt conveyor tail section by switching the tongue plate between the raised and lowered states and driving the pushing cylinder. It eliminates the need for complicated multi-step operations, reduces manpower input and operation time, and improves the working efficiency of the fully mechanized mining face.

[0016] The self-propelled belt conveyor tail section crawling and pushing system provided in this application has a guide rail fixed along the length of the self-propelled belt conveyor tail section, and a scraper conveyor and crawling support moving along the guide rail, which ensures the straightness of the movement and avoids deviation and shaking during the movement. At the same time, the limiting teeth on the top surface of the guide rail cooperate with the tongue plate to further enhance the stability of the movement trajectory.

[0017] The crawling and pushing system for the self-propelled belt conveyor tail provided in this application has a tongue plate that engages with the limiting teeth in a one-way manner when switched to the lowered state. This effectively prevents the crawling support and the self-propelled belt conveyor tail from regressing due to reaction force when the pushing cylinder pushes the self-propelled belt conveyor tail forward, ensuring the controllability of the movement process and avoiding docking deviations or safety hazards caused by equipment slippage.

[0018] The self-propelled belt conveyor tail section crawling and pushing system provided in this application can realize the gradual movement of the self-propelled belt conveyor tail section through the extension and retraction of the pushing cylinder and the switching of the tongue plate state. It can accurately adapt to the advancing rhythm of the fully mechanized mining face and ensure real-time coordination with equipment such as scraper conveyors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the scraper conveyor in an optional embodiment of this application when it is located at the first extreme position on the guide rail; Figure 2 This is a schematic diagram of the scraper conveyor in an optional embodiment of this application when it is located at the second extreme position on the guide rail; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 Sectional view at point BB.

[0020] The reference numerals in the attached figures are as follows: 1. Guide rail; 11. Limiting tooth; 111. First tooth surface; 112. Second tooth surface; 2. Scraper conveyor; 3. Crawling support seat; 4. Tongue plate; 41. First protrusion; 42. Second protrusion; 5. Pushing cylinder; 6. First lifting cylinder; 7. Second lifting cylinder; 8. Force-bearing component; 9. Bending plate; 91. Vertical section; 92. Horizontal section; 10. Roller. Detailed Implementation

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0025] See also Figures 1 to 4 As shown in the embodiment of this application, a crawling and pushing system for the tail of a belt conveyor is provided, including a guide rail 1, a scraper conveyor 2, a crawling support 3, and a pushing cylinder 5; the guide rail 1 is fixed to the top of the tail of the belt conveyor along its length direction, and the top surface of the guide rail 1 is provided with continuously distributed limiting teeth 11; the scraper conveyor 2 is movably mounted on the guide rail 1 along its length direction; the crawling support 3 is movably disposed on the guide rail 1 along its length direction and is located on the forward direction side of the scraper conveyor 2; a tongue plate 4 is rotatably connected to the end of the crawling support 3 away from the scraper conveyor 2, and the tongue plate 4 is used to adjust the position of the crawling support 3 in the raised and lowered states. Switching between states; the push cylinder 5 is located at one end of the scraper conveyor 2 near the crawling support 3, and the drive end of the push cylinder 5 is connected to the crawling support 3; wherein, when the tongue plate 4 is in the raised state, the tongue plate 4 is disengaged from the limiting teeth 11 of the guide rail 1, and the scraper conveyor 2 can move in the forward direction along the guide rail 1; when the tongue plate 4 is in the lowered state, the tongue plate 4 and the limiting teeth 11 of the guide rail 1 form a one-way engagement, so that the tongue plate 4 can only swing in the opposite direction of the forward direction, so that when the scraper conveyor 2 remains stationary, the crawling support 3, the guide rail 1 and the belt self-moving tail can be pushed in the forward direction relative to the scraper conveyor 2 by the extension of the drive end of the push cylinder 5.

[0026] The self-moving belt tail crawling and pushing system provided in the embodiments of this application can realize the movement of the self-moving belt tail by switching the tongue plate 4 between the raised and lowered states and driving the pushing cylinder 5. It eliminates the need for complicated multi-step operations, reduces manpower input and operation time, and improves the working efficiency of the fully mechanized mining face.

[0027] The self-propelled belt conveyor tail crawling and pushing system provided in the embodiments of this application has a guide rail 1 fixed along the length direction of the self-propelled belt tail, and a scraper conveyor 2 and a crawling support 3 moving along the guide rail 1, which ensures the straightness of the movement process and avoids the problems of deviation and shaking during the movement process; at the same time, the limiting teeth 11 on the top surface of the guide rail 1 cooperate with the tongue plate 4 to further enhance the stability of the movement trajectory.

[0028] The crawling and pushing system for the self-moving tail of the belt provided in the embodiments of this application has a tongue plate 4 that engages with the limiting tooth 11 in a one-way manner when switched to the lowered state. This effectively prevents the crawling support 3 and the self-moving tail of the belt from moving backward due to the reaction force when the pushing cylinder 5 pushes the self-moving tail of the belt forward, ensuring the controllability of the movement process and avoiding docking deviations or safety hazards caused by equipment slippage.

[0029] The self-propelled belt conveyor tail crawling and pushing system provided in the embodiments of this application can realize the gradual movement of the self-propelled belt conveyor tail by extending and retracting the pushing cylinder 5 and switching the state of the tongue plate 4. It can accurately adapt to the advancing rhythm of the fully mechanized mining face and ensure real-time coordination with equipment such as the scraper conveyor 2.

[0030] The guide rail 1 is fixed to the top of the self-propelled belt conveyor tail along its length. Its top surface has continuously distributed limiting teeth 11, forming a toothed structure similar to a rack. Here, the guide rail 1 serves as the track for the crawling and pushing system of the self-propelled belt conveyor tail, providing movement guidance for other components. At the same time, it achieves unidirectional limiting through the cooperation of the limiting teeth 11 and the tongue plate 4.

[0031] The scraper conveyor 2 is mounted on the guide rail 1 and can move along the length of the guide rail 1. A moving trolley is movably mounted on the guide rail 1, and the head of the scraper conveyor 2 is fixed relative to the moving trolley. In practical applications, the head of the scraper conveyor 2 and the moving trolley remain stationary when pushing the belt to move the tail of the conveyor, providing reaction force support for the pushing cylinder 5.

[0032] The crawling support 3 also moves along the guide rail 1, located on the forward direction side of the scraper conveyor 2, i.e., the side where the belt self-moving tail needs to move. Here, the end of the crawling support 3 away from the scraper conveyor 2 is connected to the tongue plate 4 via a rotating shaft. The tongue plate 4 can switch between raised and lowered states. In practical applications, the tongue plate 4, in cooperation with the limiting teeth 11 of the guide rail 1, achieves one-way engagement, similar to the anti-backward function of a ratchet pawl.

[0033] One end of the pushing cylinder 5 is fixed to the side of the scraper conveyor 2 near the crawling support 3, and the other end is connected to the crawling support 3. Here, the end of the pushing cylinder 5 connected to the crawling support 3 is the driving end, which is used to push the crawling support 3 through telescopic movement, thereby indirectly driving the guide rail 1 and the tail of the belt self-moving machine to move.

[0034] Specifically, in practical applications, when the tongue plate 4 is in the raised state, it disengages from the limiting teeth 11 of the guide rail 1, and there is no engagement. The scraper conveyor 2 can move a certain distance along the guide rail 1 in the forward direction, i.e., the direction in which the tail needs to move. At this time, because the tongue plate 4 is raised, the crawling support 3 can move synchronously with the scraper conveyor 2. When the crawling support 3 moves to the limit position without disengaging from the guide rail 1 under the drive of the scraper conveyor 2, the tongue plate 4 switches to the lowered state, and the tongue plate 4 and the limiting teeth 11 of the guide rail 1 form a one-way engagement, so that the tongue plate 4 can only swing in the opposite direction of the forward direction. At this time, the scraper conveyor 2 remains stationary, serving as a fixed fulcrum, and the drive end of the push cylinder 5 extends, pushing the crawling support 3 in the forward direction. Because the tongue plate 4 is engaged with the limiting tooth 11 in one direction, the crawling support 3 cannot move forward. At this time, the thrust of the pushing cylinder 5 will react on the guide rail 1, which will drive the belt fixed to it to move at the tail of the machine. Relative to the stationary scraper conveyor 2, the belt will move a certain distance in the forward direction, which is equal to the extension of the pushing cylinder 5. After the pushing cylinder 5 completes one extension stroke, the scraper conveyor 2 remains stationary. At this time, the drive end of the pushing cylinder 5 begins to retract. Because the tongue plate 4 is in the lowered state and engaged with the limiting tooth 11 in one direction, the tongue plate 4 is only allowed to swing in the opposite direction of the forward direction. The retraction action will pull the crawling support 3 towards the scraper conveyor 2, that is, in the opposite direction of the forward direction. At this time, driven by the crawling support 3, the tongue plate 4 will be passively swung in the opposite direction along the inclined surface of the limiting tooth 11 without disengaging from the engagement, until the crawling support 3 moves to a position close to the initial position of the scraper conveyor 2, that is, the cylinder retracts to the shortest stroke. It should be noted that if the cumulative movement distance of the self-propelled belt conveyor tail section meets the user's requirements after the push cylinder 5 completes one extension / retraction action, i.e., reaches the preset position, then the tongue plate 4 switches from the lowered state to the raised state, disengaging from the limiting teeth 11 of the guide rail 1. At this time, the scraper conveyor 2 can continue to move forward along the guide rail 1. If the cumulative movement distance of the self-propelled belt conveyor tail section does not meet the user's requirements after the push cylinder 5 completes one extension / retraction action, then the tongue plate 4 remains in the lowered state, forming a one-way engagement with the limiting teeth 11. The scraper conveyor 2 remains stationary, serving as a fixed fulcrum. The push cylinder 5 extends again, pushing the self-propelled belt conveyor tail section forward until a new extension / retraction action is completed. Through multiple cycles of accumulating movement distance, the self-propelled belt conveyor tail section eventually reaches the preset position.

[0035] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figures 1 to 3As shown, the tongue plate 4 includes a first protrusion 41 and a second protrusion 42. The first protrusion 41 is used to form a rotatable connection point with the crawling support 3, so that the tongue plate 4 can switch between a raised state and a lowered state around the rotatable connection point. The second protrusion 42 is used to form a detachable connection with the crawling support 3 when the tongue plate 4 is in the raised state, so as to fix the tongue plate 4 in the raised position and keep the tongue plate 4 out of contact with the limiting teeth 11 of the guide rail 1. When the connection between the second protrusion 42 and the crawling support 3 is released, the tongue plate 4 can rotate around the rotatable connection point to the lowered state, so that the tongue plate 4 and the limiting teeth 11 of the guide rail 1 form a one-way engagement.

[0036] In this embodiment, the first protrusion 41 of the tongue plate 4 forms a rotatable connection point with the crawling support 3, and the second protrusion 42 of the tongue plate 4 forms a detachable connection with the crawling support 3 when the tongue plate 4 is in the raised state. This allows the operator to control the state of the tongue plate 4 through simple connection and disconnection operations, thereby conveniently controlling the movement process of the belt self-moving tail, reducing the difficulty and complexity of operation, and improving work efficiency.

[0037] Specifically, the first protrusion 41 forms a rotatable connection point with the crawling support 3, allowing the tongue plate 4 to switch between a raised and lowered state around this rotatable connection point. This provides a basis for the tongue plate 4 to perform different functions. Through state switching, in conjunction with the action of the pushing cylinder 5, the movement and positioning of the belt self-moving tail section are realized. When the tongue plate 4 is in the raised state, the second protrusion 42 forms a detachable connection with the crawling support 3, fixing the tongue plate 4 in the raised position. This keeps the tongue plate 4 out of contact with the limiting teeth 11 of the guide rail 1, ensuring that when the scraper conveyor 2 needs to move, the tongue plate 4 will not fall and engage with the limiting teeth 11 due to unexpected factors, thus ensuring that the scraper conveyor 2 can move smoothly along the guide rail 1 in the forward direction. When the connection between the second protrusion 42 and the crawling support 3 is released, the tongue plate 4 can rotate around the rotatable connection point to the lowered state, forming a one-way engagement with the limiting teeth 11 of the guide rail 1. This effectively prevents the crawling support 3 and the belt self-moving tail from moving backward due to the reaction force when the pushing cylinder 5 pushes the belt self-moving tail forward, ensuring the controllability and stability of the movement process.

[0038] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figures 1 to 3 As shown, the limiting tooth 11 on the top surface of the guide rail 1 has a first tooth surface 111 facing the forward direction and a second tooth surface 112 facing the opposite direction of the forward direction. Both the first tooth surface 111 and the second tooth surface 112 are inclined surfaces facing the opposite direction of the forward direction. When the tongue plate 4 is in the lowered state, the tongue plate 4 can form a stop engagement with the second tooth surface 112 of the limiting tooth 11 and can slide along the first tooth surface 111.

[0039] In this embodiment, the inclined tooth surface design makes the contact force direction between the tongue plate 4 and the limiting tooth 11 more aligned with the mechanical requirements of equipment movement: when pushing the belt self-moving tail forward, the inclination angle of the second tooth surface 112 can distribute the thrust to the overall structure of the guide rail 1, avoiding excessive local stress that could cause guide rail deformation; during reverse reset, the inclination angle of the first tooth surface 111 can reduce the sliding resistance of the tongue plate 4, reducing the energy consumption of the pushing cylinder 5. Overall, the inclined tooth surface design makes the force transmission smoother, reduces vibration or impact during equipment movement, and improves the operational stability of the entire crawling and pushing system.

[0040] When the tongue plate 4 is in the lowered state, it forms a stop engagement with the second tooth surface 112 of the limiting tooth 11. Since the second tooth surface 112 is an inclined surface facing the opposite direction of travel, the tongue plate 4 and the second tooth surface 112 form a surface contact stop structure, effectively bearing the reaction force generated when the pushing cylinder 5 pushes the belt-driven self-moving tail section, preventing the crawling support 3 and the belt-driven self-moving tail section from retracting due to the reaction force. It should be noted that compared to a vertical tooth surface, the inclined second tooth surface 112 can distribute the force, reduce localized wear, extend the service life of the limiting tooth 11 and the tongue plate 4, and ensure the stability of the unidirectional stop.

[0041] When the push cylinder 5 retracts and pulls the crawling support 3 in the opposite direction of the forward movement, i.e., closer to the scraper conveyor 2, the tongue plate 4 needs to slide along the first tooth surface 111 of the limiting tooth 11. Since the first tooth surface 111 is also an inclined surface facing the opposite direction of the forward movement, the tongue plate 4 will naturally lift and slide along the inclined surface when moving in the opposite direction, smoothly passing over the limiting tooth 11 without additional operation, thus realizing the reset of the crawling support 3. This avoids jamming or sticking between the tongue plate 4 and the limiting tooth 11 when moving in the opposite direction, ensuring that the retraction action of the push cylinder 5 is completed efficiently, and preparing for the next self-moving of the belt tail.

[0042] In the above embodiments, see Figures 1 to 3 As shown, the tilt angle of the first tooth surface 111 is greater than the tilt angle of the second tooth surface 112.

[0043] Here, the second tooth surface 112 faces the opposite direction of the forward movement with a small tilt angle. When the tongue plate 4 is in the lowered state and forms a stop with the second tooth surface 112, the small tilt angle increases the positive pressure and friction between the tongue plate 4 and the second tooth surface 112, improving the reverse stop effect on the crawling support 3 and the self-moving tail of the belt conveyor. This effectively prevents the equipment from reversing due to reaction force during the pushing process, ensuring the reliability of unidirectional engagement. The first tooth surface 111 faces the forward movement with a larger tilt angle. When the crawling support 3 moves in the opposite direction with the retraction of the pushing cylinder 5, the tongue plate 4 can slide along the first tooth surface 111. At this time, the larger tilt angle of the first tooth surface 111 reduces the contact resistance between the tongue plate 4 and the tooth surface, making the reverse reset process of the crawling support 3 smoother, reducing wear between components, lowering energy consumption, and improving the operating efficiency of the system.

[0044] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the moving path of the scraper conveyor 2 on the guide rail 1 includes a first limit position and a second limit position. When the scraper conveyor 2 is in the first limit position, the tongue plate 4 switches to the raised state, and the scraper conveyor 2 can move from the first limit position to the second limit position. When the scraper conveyor 2 moves to the second limit position, the tongue plate 4 switches to the lowered state, and the crawling support 3, the guide rail 1 and the belt self-moving tail can move relative to the scraper conveyor 2 in the forward direction under the action of the pushing cylinder 5.

[0045] In this embodiment, by setting a first limit position and a second limit position, a clear boundary is provided for the movement range of the scraper conveyor 2, preventing it from exceeding the effective working range and ensuring the stability and safety of the equipment operation; at the same time, the tongue plate 4 switches between the two limit positions, reducing manual intervention and improving the automation level of the equipment operation.

[0046] Here, the first extreme position refers to the position that the scraper conveyor 2 can reach on the guide rail 1 that is closest to the opposite direction of the forward direction, and the second extreme position refers to the position that the scraper conveyor 2 can reach after moving along the guide rail 1 in the forward direction that is closest to the forward direction.

[0047] When the scraper conveyor 2 is at the first extreme position, the tongue plate 4 is raised, allowing the scraper conveyor 2 to move smoothly to the second extreme position. At this time, the tongue plate 4 disengages from the limiting teeth 11 of the guide rail 1, avoiding jamming during reverse movement and ensuring the working efficiency of the scraper conveyor 2.

[0048] When the scraper conveyor 2 reaches the second limit position, the tongue plate 4 is lowered and forms a one-way engagement with the limiting tooth 11. At this time, with the help of the pushing cylinder 5, the crawling support 3, the guide rail 1 and the belt self-moving tail can move in the forward direction relative to the scraper conveyor 2, forming a continuous working cycle.

[0049] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the self-moving belt tail crawling and pushing system also includes a first lifting cylinder 6. The first lifting cylinder 6 is fixed relative to the guide rail 1. The position of the first lifting cylinder 6 corresponds to the position of the tongue plate 4 when the scraper conveyor 2 is in the first extreme position in the guide rail 1. The first lifting cylinder 6 is used to drive the tongue plate 4 to rotate to the lifted position when the scraper conveyor 2 is in the first extreme position.

[0050] In this embodiment, when the scraper conveyor 2 moves to the first limit position, the first lifting cylinder 6 can directly drive the tongue plate 4 to rotate to the lifted position without manual operation, reducing labor costs and avoiding delays or errors that may occur during manual switching, thereby improving the automation and efficiency of equipment operation.

[0051] The first lifting cylinder 6 is relatively fixed to the guide rail 1, that is, it does not move with the scraper conveyor 2 or the crawling support 3.

[0052] Specifically, when the scraper conveyor 2 moves on the guide rail 1 and reaches the first limit position, the tongue plate 4 is exactly within the working range of the first lifting cylinder 6. The first lifting cylinder 6 will actively extend its drive end to apply an upward thrust to the tongue plate 4, forcing the tongue plate 4 to rotate upward around its rotatable connection point with the crawling support 3, i.e., the rotatable connection point formed by the first protrusion 41 and the crawling support 3, until the tongue plate 4 switches to the raised position. At this time, the operator can connect the second protrusion 42 and the crawling support 3 by simply inserting and removing the locking pin to securely lock the tongue plate 4 in the raised position. Thus, even if the drive end of the first lifting cylinder 6 is retracted, the tongue plate 4 can remain disengaged from the limiting tooth 11 of the guide rail 1, avoiding the tongue plate 4 accidentally falling and engaging with the limiting tooth 11 during the movement of the scraper conveyor 2 towards the second limit position, thus preventing obstruction of movement. Understandably, after the scraper conveyor 2 has moved smoothly along the guide rail 1 to the second limit position, the operator will release the locking pin connection between the second protrusion 42 and the crawling support 3. The tongue plate 4 will then rotate downward around the rotatable connection point of the first protrusion 41 under its own weight or the action of the related reset mechanism, switching to the lowered state, and forming a one-way engagement with the limiting teeth 11 of the guide rail 1. This provides a reliable stop foundation for the subsequent pushing cylinder 5 to push the crawling support 3, the guide rail 1 and the belt self-moving tail to move forward.

[0053] Here, the crawling support 3 includes a support body and ear plates. The ear plates are vertically fixed to the top of the support body at the end furthest from the scraper conveyor 2. A first protrusion 41 is located at one end of the tongue plate 4 and is rotatably connected to the support body via a pin. Specifically, the support body has a through-hole corresponding to the position of the first protrusion 41, and the first protrusion 41 has a matching through hole. After the pin passes through the holes of both, both ends are limited by snap rings, allowing the tongue plate 4 to rotate flexibly around the pin as the axis, realizing the switching between the raised and lowered states. The second protrusion 42 is set at an angle to the first protrusion 41. When the tongue plate 4 rotates to the raised position, the second protrusion 42 is aligned with a pre-set locking hole on the top ear plate of the support body. At this point, by inserting and removing the locking pin through the through hole of the second protrusion 42 and the locking hole of the ear plate, the tongue plate 4 can be detachably fixed in the raised position; after the locking pin connection is released, the tongue plate 4 rotates around the pin shaft of the first protrusion 41 under the action of gravity, naturally switching to the lowered state and forming a one-way engagement with the limiting teeth 11 of the guide rail 1.

[0054] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the self-moving belt tail crawling and pushing system also includes a second lifting cylinder 7. The second lifting cylinder 7 is fixed relative to the guide rail 1. The position of the second lifting cylinder 7 corresponds to the position of the tongue plate 4 when the scraper conveyor 2 is in the second extreme position in the guide rail 1. The second lifting cylinder 7 is used to support the tongue plate 4 when the scraper conveyor 2 is in the second extreme position and the tongue plate 4 is in the raised state.

[0055] In this embodiment, when the second lifting cylinder 7 lifts the tongue plate 4, it can adjust the height and posture of the tongue plate 4 so that the through hole of the second protrusion 42 is completely aligned with the lock hole of the ear plate, eliminating the additional pressure or shear force on the lock pin, and putting the lock pin in a stress-free state, thereby making it easy to remove and reducing the need for forced prying by manpower or tools.

[0056] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, a force-receiving component 8 is detachably provided on the tongue plate 4. The force-receiving component 8 is used to cooperate with the first lifting cylinder 6 and the second lifting cylinder 7. The driving ends of the first lifting cylinder 6 and the second lifting cylinder 7 act on the force-receiving component 8.

[0057] In this embodiment, the force-bearing component 8 is the component that directly acts on the first lifting cylinder 6 and the second lifting cylinder 7. This can prevent the driving force of the first lifting cylinder 6 and the second lifting cylinder 7 from being directly applied to the tongue plate 4 body, reduce the wear, deformation or damage of the tongue plate 4 caused by long-term force, extend the service life of the tongue plate 4, and reduce the maintenance cost of the core component.

[0058] Among them, the load-bearing component 8 can be a bolt, pin, etc., and this application does not limit it.

[0059] Specifically, in some specific examples, when the force-bearing component 8 is a bolt, a threaded hole matching the bolt can be opened at a preset positioning point on the tongue plate 4, corresponding to the working position of the first lifting cylinder 6 and the second lifting cylinder 7. The bolt is screwed into the threaded hole of the tongue plate 4 through the thread, and its exposed part, such as the bolt head or the extension of the screw, serves as the force-bearing part in contact with the driving end of the first lifting cylinder 6 and the second lifting cylinder 7. When disassembly or replacement is required, the bolt can be unscrewed from the threaded hole simply by using a wrench or other tools. The operation is simple and the connection is stable, which can reliably transmit the thrust or support force of the lifting cylinder. In other specific examples, when the force-bearing component 8 is a pin, a through pin hole can be opened at a preset positioning point on the tongue plate 4, corresponding to the working position of the first lifting cylinder 6 and the second lifting cylinder 7. The pin is inserted into the pin hole with a clearance fit or a transition fit. One or both ends of the pin protrude from the surface of the tongue plate 4 to form a force-bearing end for contact with the driving end of the lifting cylinder. To prevent the pin from falling out during operation, a retaining ring groove can be provided at the exposed end of the pin, and axial positioning can be achieved by installing the retaining ring. For disassembly, simply remove the retaining ring and pull the pin out of the pin hole to complete the replacement.

[0060] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 4 As shown, bending plates 9 are arranged opposite to each other on both sides of the crawling support 3. The bending plate 9 includes a vertical section 91 connected to the crawling support 3 and a horizontal section 92 that bends and extends from the vertical section 91 toward the guide rail 1. The horizontal section 92 is located on the side of the guide rail 1 away from the crawling support 3.

[0061] In this embodiment, the transverse segment 92 is located on the side of the guide rail 1 away from the crawling support seat 3, which can prevent the crawling support seat 3 from detaching from the guide rail 1 when the crawling support seat 3 moves relative to the guide rail 1.

[0062] The two opposing bent plates 9 can be bolted to both sides of the crawling support 3.

[0063] The vertical section 91 of the bending plate 9 is the part that is directly connected to the crawling support 3. It extends in the vertical direction and is used to connect the horizontal section 92 to the crawling support 3 and provide support in the height direction.

[0064] The transverse section 92 of the bending plate 9 extends from the bottom end of the vertical section 91, bending inwards towards the mutual inward direction of the two bending plates 9. This transverse section 92 is parallel to the guide rail 1 and serves to block and limit the crawling support 3 when it tends to move away from the guide rail 1, preventing the crawling support 3 from losing contact with the guide rail 1.

[0065] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 , Figure 2 and Figure 4 As shown, a roller 10 is rotatably provided at the bottom of the crawling support 3, and the roller 10 makes rolling contact with the top surface of the guide rail 1.

[0066] In this embodiment, the rolling friction coefficient between the roller 10 and the guide rail 1 is much smaller than that of the sliding friction, which can significantly reduce the resistance when the crawling support 3 moves relative to the guide rail 1, making the movement smoother and less strenuous, and reducing the load and energy consumption of the pushing cylinder 5.

[0067] Specifically, the outer circumferential surface of the roller 10 is in direct contact with the top surface of the guide rail 1, and when the crawling support 3 moves, the roller 10 will rotate around its own axis and move along the top surface of the guide rail by rolling rather than sliding.

[0068] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A crawling and pushing system for the tail of a belt conveyor, characterized in that, include: A guide rail is fixed to the top of the belt self-moving machine tail along the length direction of the belt self-moving machine tail, and the top surface of the guide rail is provided with continuously distributed limiting teeth. A scraper conveyor is movably mounted on the guide rail along the length of the guide rail; A crawling support is movably disposed on the guide rail along the length of the guide rail and located on the forward direction side of the scraper conveyor; a tongue plate is rotatably connected to the end of the crawling support away from the scraper conveyor, and the tongue plate is used to switch between a raised state and a lowered state. A push cylinder is disposed at one end of the scraper conveyor near the crawling support, and the drive end of the push cylinder is connected to the crawling support. When the tongue plate is in the raised state, it disengages from the limiting teeth of the guide rail, allowing the scraper conveyor to move forward along the guide rail. When the tongue plate is in the lowered state, it engages with the limiting teeth of the guide rail in one direction, allowing it to swing only in the opposite direction of the forward movement. This allows the crawling support, the guide rail, and the belt self-moving tail to move relative to the scraper conveyor in the forward movement direction while the scraper conveyor remains stationary, through the extension of the drive end of the pushing cylinder.

2. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 1, characterized in that, The tongue plate includes a first protrusion and a second protrusion; the first protrusion is used to form a rotatable connection point with the crawling support, so that the tongue plate can switch between the raised state and the lowered state around the rotatable connection point; the second protrusion is used to form a detachable connection with the crawling support when the tongue plate is in the raised state, so as to fix the tongue plate in the raised position and keep the tongue plate out of contact with the limiting teeth of the guide rail; when the connection between the second protrusion and the crawling support is released, the tongue plate can rotate around the rotatable connection point to the lowered state, so that the tongue plate and the limiting teeth of the guide rail form a one-way engagement.

3. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 1, characterized in that, The limiting tooth on the top surface of the guide rail has a first tooth surface facing the forward direction and a second tooth surface facing the opposite direction of the forward direction. Both the first tooth surface and the second tooth surface are inclined surfaces facing the opposite direction of the forward direction. When the tongue plate is in the lowered state, the tongue plate can form a stop engagement with the second tooth surface of the limiting tooth and can slide along the first tooth surface.

4. The self-propelled belt conveyor tail crawling and pushing system according to claim 3, characterized in that, The tilt angle of the first tooth surface is greater than the tilt angle of the second tooth surface.

5. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 1, characterized in that, The scraper conveyor's movement path on the guide rail includes a first limit position and a second limit position. When the scraper conveyor is at the first limit position, the tongue plate switches to the raised state, and the scraper conveyor can move from the first limit position to the second limit position. When the scraper conveyor moves to the second limit position, the tongue plate switches to the lowered state, and the crawling support, the guide rail, and the belt self-moving tail can move relative to the scraper conveyor in the forward direction under the action of the pushing cylinder.

6. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 5, characterized in that, Also includes: The first lifting cylinder is fixed relative to the guide rail. The position of the first lifting cylinder corresponds to the position of the tongue plate when the scraper conveyor is in the first extreme position in the guide rail. The first lifting cylinder is used to drive the tongue plate to rotate to the lifted position when the scraper conveyor is in the first extreme position.

7. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 6, characterized in that, Also includes: The second lifting cylinder is fixed relative to the guide rail. The position of the second lifting cylinder corresponds to the position of the tongue plate when the scraper conveyor is in the second extreme position in the guide rail. The second lifting cylinder is used to support the tongue plate when the scraper conveyor is in the second extreme position and the tongue plate is in the raised state.

8. The self-propelled belt conveyor tail section crawling and pushing system according to claim 7, characterized in that, A force-bearing component is detachably provided on the tongue plate. The force-bearing component is used to cooperate with the first lifting cylinder and the second lifting cylinder. The driving ends of the first lifting cylinder and the second lifting cylinder act on the force-bearing component.

9. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 1, characterized in that, The crawling support base has two opposing bending plates on its two sides. Each bending plate includes a vertical section connected to the crawling support base and a horizontal section that bends and extends from the vertical section toward the guide rail. The horizontal section is located on the side of the guide rail away from the crawling support base.

10. The self-propelled belt conveyor tail-end crawling and pushing system according to claim 1, characterized in that, The bottom of the crawling support is rotatably provided with rollers, which make rolling contact with the top surface of the guide rail.

Images