A coal breaking mechanism of a hydraulic support tail beam, a hydraulic support tail beam and a hydraulic support

Abstract

The application provides a coal breaking mechanism of a hydraulic support tail beam, the hydraulic support tail beam and the hydraulic support, and belongs to the technical field of hydraulic supports. The coal breaking mechanism is arranged on a tail beam body. The coal breaking mechanism comprises a cutting tooth seat, the cutting tooth seat is fixedly connected with the tail beam body, a cutting tooth is arranged on the cutting tooth seat, the tooth tip of the cutting tooth extends to the surface of a scraper conveyor located below the tail beam body, and is used for contacting and breaking large pieces of coal located on the scraper conveyor. The coal breaking mechanism is combined by the structure of the cutting tooth seat and the cutting tooth, can drive the large pieces of coal to naturally impact the cutting tooth by inertia in the transportation process of the scraper conveyor, or actively completes the breaking of the large pieces of coal by using the impact force of the cutting tooth in cooperation with the lifting action of the tail beam, reduces the operation demand of the staff to approach the running equipment from the source, avoids the safety risks such as rock injury and equipment misstart in the process of artificial knocking, greatly reduces the physical labor intensity, and solves the safety and workload problems caused by manual processing.

Description

Technical Field

[0001] This application belongs to the field of hydraulic support technology, and in particular relates to a coal breaking mechanism of a hydraulic support tail beam, a hydraulic support tail beam, and a hydraulic support. Background Technology

[0002] like Figure 1 As shown, in the integrated mechanized mining (including top coal caving mining) operation of coal mines, the hydraulic support 1, scraper conveyor 2, and transfer conveyor 3 together constitute the core collaborative system for coal mining and transportation. The three need to work closely together to achieve continuous coal output: after the coal in the low coal seam area is mined by the coal mining machine, the top coal in the high coal seam area will fall onto the conveying surface of the scraper conveyor 2 through the tail beam of the hydraulic support 1. Then, the scraper conveyor 2 will transfer the coal to the transfer conveyor 3 at a preset speed. Finally, the transfer conveyor 3 will transport the coal to the subsequent transportation link. This collaborative mode is a key link to ensure the efficiency of coal mining.

[0003] However, existing collaborative systems suffer from significant transport obstruction problems in practical applications. Due to factors such as coal seam structure and hardness during the descent of top coal, large lumps of coal A, exceeding the capacity of the feed inlet of transfer conveyor 3, are easily formed. When these large lumps of coal A are transferred from scraper conveyor 2 to transfer conveyor 3, they often get stuck above the feed inlet of transfer conveyor 3 due to their excessive size, causing the conveying link of scraper conveyor 2 to be interrupted. This, in turn, causes the coal discharge action of hydraulic support 1 to be suspended, seriously disrupting the continuity of the mining process.

[0004] To address the aforementioned problem of large coal chunks (A) getting stuck, existing technologies generally employ manual methods. This requires workers to approach the suspended scraper conveyor 2 and transfer conveyor 3, using tools such as hammers to break up the large coal chunks stuck above transfer conveyor 3 until the coal size meets the feeding requirements of transfer conveyor 3. This method not only significantly increases the physical labor intensity of workers, but also exposes them to safety risks such as injury from falling rocks or accidental equipment activation while working near large equipment like hydraulic supports 1 and scraper conveyor 2. Furthermore, the time-consuming manual process further extends the downtime of hydraulic supports 1 and scraper conveyor 2, significantly reducing the overall mining efficiency and failing to meet the high-efficiency and safe production requirements of modern coal mines. Utility Model Content

[0005] This application provides a coal breaking mechanism for a hydraulic support tail beam, a hydraulic support tail beam, and a hydraulic support. The coal breaking mechanism, by setting a cutting tooth seat and cutting teeth on the main body of the tail beam, can actively break large pieces of coal by means of the inertia of the scraper conveyor or the lifting of the tail beam, without manual operation. This reduces the amount of manual labor and the safety risks of working near the equipment, and avoids transportation interruptions caused by large pieces of coal blocking the road, ensuring the continuity of mining and transportation, and improving the overall mining efficiency. It solves the problem that in the existing hydraulic support, large pieces of coal formed by the falling top coal are easily stuck above the transfer machine during coal transportation, requiring workers to approach the operating equipment to manually break them to restore transportation. This not only greatly increases the amount of manual labor, but also easily causes safety accidents, and leads to equipment downtime and reduced mining efficiency.

[0006] This application provides a coal breaking mechanism for a hydraulic support tail beam. The coal breaking mechanism is disposed on the tail beam body and includes a cutting tooth seat. The cutting tooth holder is fixedly connected to the tail beam body, and the cutting tooth holder is provided with cutting teeth; The tips of the cutting teeth extend toward the surface of the scraper conveyor located below the tail beam body, for contacting and crushing large pieces of coal located on the scraper conveyor.

[0007] In one feasible implementation, the cutting tooth seat is provided on both sides of the tail beam body in the width direction; One end of the cutting tooth holder is welded and fixed to the tail beam body, and the other end extends outward from the tail beam body along the side opposite to the width direction of the tail beam body.

[0008] In one feasible implementation, three cutting tooth seats are provided on both sides of the tail beam body in the width direction; The three cutting tooth seats on the same side are distributed along the length of the tail beam body.

[0009] In one feasible implementation, of the three cutting tooth seats on the same side, the cutting tooth seat located in the middle extends outward from the tail beam body only along the side opposite to the width direction of the tail beam body; the cutting tooth seats located on the side extend outward from the tail beam body while also extending away from the middle cutting tooth seat.

[0010] In one feasible implementation, the coal breaking mechanism further includes a gangue-blocking device; The rock-blocking device is located at the end of the tail beam body. The rock-blocking device is used to shield the motor of the hydraulic support to prevent rock and coal from hitting the motor.

[0011] In one feasible implementation, the waste rock blocking device includes a telescopic mechanism and a waste rock blocking plate; One end of the baffle plate is hinged to the end of the tail beam body; One end of the telescopic mechanism is hinged to the main body of the tail beam, and the other end is hinged to the middle of the baffle plate. The telescopic mechanism is used to drive the baffle plate to rotate around the hinge point between it and the main body of the tail beam, so as to move closer to or away from the motor.

[0012] In one feasible implementation, the telescopic mechanism is a hydraulic cylinder, the cylinder barrel of which is hinged to the tail beam body, and the piston rod of which is hinged to the baffle plate.

[0013] In one feasible implementation, the side of the baffle plate facing the motor is provided with a reinforcing plate, and a plurality of the reinforcing plates are evenly distributed along the length direction of the baffle plate; The reinforcing plate is used to enhance the structural strength of the rock-blocking plate.

[0014] This application also provides a hydraulic support tail beam, including a tail beam body and a coal breaking mechanism as described above.

[0015] This application embodiment provides another hydraulic support, including the aforementioned hydraulic support tail beam.

[0016] This application provides a coal crushing mechanism for a hydraulic support tail beam, a hydraulic support tail beam, and a hydraulic support. The coal crushing mechanism, through the structural combination of the cutting tooth seat and the cutting tooth, can use the inertia of the scraper conveyor during transportation to drive large pieces of coal to naturally impact the cutting tooth, or cooperate with the lifting action of the tail beam to actively complete the crushing of large pieces of coal using the impact force of the cutting tooth. This reduces the need for workers to approach the operating equipment from the source, avoiding safety risks such as injuries from falling gangue and accidental equipment start-up when manually crushing coal, and significantly reducing the intensity of physical labor, thus solving the safety and workload problems caused by manual processing.

[0017] Meanwhile, the pre-crushing of large coal pieces by the cutting teeth ensures that the coal meets the conveying size requirements before entering the transfer machine, effectively avoiding the shutdown of the scraper conveyor and transfer machine caused by large coal pieces blocking the machine, ensuring the continuity of the mining and transportation process, shortening equipment downtime, and directly improving the overall mining efficiency of the coal mine. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the working status of the hydraulic support, scraper conveyor, and transfer conveyor; Figure 2 This is a structural schematic diagram of the coal breaking mechanism of a hydraulic support tail beam provided in this application; Figure 3 This is a schematic diagram of the coal breaking mechanism; Figure 4 This is a structural schematic diagram of the hydraulic support provided in this application in its working state.

[0019] Explanation of reference numerals in the attached figures: 1-Hydraulic support; 2-Scraper conveyor; 3-Transfer conveyor; 100 - Coal breaking mechanism; 200 - Tail beam main body; 110 - Cutting tooth holder; 120 - Cutting tooth; 130 - Slag-blocking device; 131-Telescopic mechanism; 132-Blocking plate; 133-Reinforcing plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0021] Currently, in top-coal caving mining in coal mines, large pieces of coal are prone to appear when releasing coal behind the hydraulic support. These large pieces of coal are easily blocked during the transport of the scraper conveyor to the transfer conveyor, requiring manual close-range breaking. This increases the labor intensity of workers and exposes them to safety risks such as injury from falling rocks and accidental equipment startup. Furthermore, blockages can interrupt the mining process and reduce mining efficiency. The coal breaking mechanism of the hydraulic support tail beam, the hydraulic support tail beam, and the hydraulic support itself provided in this application, along with the coal breaking mechanism of the hydraulic support and its tail beam, achieves mechanical coal breaking (including both inertial and active dual breaking modes) through a cutting tooth structure. This eliminates the need for manual handling of large pieces of coal, thereby eliminating personnel safety risks, significantly reducing labor intensity, preventing blockages caused by large pieces of coal, ensuring continuous mining processes, and significantly improving the efficiency, safety, and overall benefits of top-coal caving mining in coal mines.

[0022] The following detailed description, in conjunction with the accompanying drawings, illustrates the coal breaking mechanism of the hydraulic support tail beam, the hydraulic support tail beam, and the specific structure of the hydraulic support provided in this application.

[0023] Reference Figure 2 and Figure 3 As shown, this application embodiment provides a coal breaking mechanism for a hydraulic support tail beam. The coal breaking mechanism 100 is disposed on the tail beam body 200 and includes a cutting tooth seat 110. The cutting tooth holder 110 is fixedly connected to the tail beam body 200, and the cutting tooth holder 110 is provided with cutting teeth 120; The tip of the cutting tooth 120 extends toward the surface of the scraper conveyor located below the tail beam body 200, for contacting and crushing large pieces of coal located on the scraper conveyor.

[0024] The coal breaking mechanism 100 is installed on the tail beam body 200 and is used to break up large pieces of coal on the scraper conveyor in the scenario of top coal caving mining in coal mines to prevent large pieces of coal from getting stuck at the transfer machine.

[0025] The coal crushing mechanism 100 includes a cutting tooth holder 110, which serves as the mounting carrier for the cutting teeth. Its structural strength must be adapted to the complex working environment of underground coal mines and meet the stress requirements when crushing large pieces of coal. The cutting tooth holder 110 is fixedly connected to the tail beam body 200, ensuring a stable connection and preventing the cutting tooth holder from falling off due to vibration or impact during operation.

[0026] The cutting tooth holder 110 is equipped with cutting teeth 120, which can be made of high-strength wear-resistant material, with sufficient hardness and sharpness, and can effectively deal with coal blocks of different hardness.

[0027] The tip of the cutting tooth 120 extends toward the surface of the scraper conveyor located below the tail beam body 200. This orientation design allows the coal block to naturally come into contact with the cutting tooth 120 under the drive of the scraper conveyor, and the coal block is crushed by impact force. It is used to contact and crush large pieces of coal located on the scraper conveyor, ensuring that the crushed coal block can pass smoothly through the transfer machine.

[0028] If a hard coal block is encountered that cannot be broken, the scraper conveyor can be paused, the tail beam raised, and then quickly lowered to break the coal block with the cutting teeth 120.

[0029] This application provides a coal-breaking mechanism with cutting teeth 120 installed on the tail beam body 200, which can break large coal pieces without manual intervention, reducing the workload of manually breaking large coal pieces and lowering the labor intensity of workers; at the same time, it avoids the interruption of the mining process caused by large coal pieces blocking the process, ensuring the stability of mining efficiency.

[0030] Reference Figure 2 and Figure 3 As shown, in some embodiments, the tail beam body 200 is provided with cutting tooth seats 110 on both sides in the width direction. One end of the cutting tooth seat 110 is welded and fixed to the tail beam body 200, and the other end extends outward from the tail beam body 200 along the side opposite to the width direction of the tail beam body 200.

[0031] Both sides of the tail beam main body 200 in the width direction are equipped with cutting tooth seats 110. The double-sided arrangement can expand the coal crushing coverage area, ensuring that large pieces of coal at different positions on the scraper conveyor can contact the cutting teeth, improving the comprehensiveness of crushing. One end of the cutting tooth seat 110 is welded and fixed to the tail beam main body 200. The welding process must meet the structural strength requirements to ensure that the connection between the cutting tooth seat and the tail beam main body 200 is firm and reliable, and can withstand the impact force generated when coal blocks collide. The other end extends outward from the side opposite to the width direction of the tail beam main body 200. The extension length must be adapted to the width of the scraper conveyor and the movement trajectory of the coal blocks, so that the cutting teeth can accurately engage with the movement path of large pieces of coal, improving the crushing effect.

[0032] By setting the cutting tooth seat 110 on both sides and fixing it by welding, the coal crushing coverage area is expanded and the installation stability of the cutting tooth seat 110 is enhanced. The design of extending to the outside allows the cutting tooth 120 to contact large pieces of coal more accurately, which significantly improves the crushing efficiency and effect, further reduces the probability of large pieces of coal getting stuck, and ensures the smoothness of the transportation link.

[0033] Reference Figure 2 and Figure 3 As shown, in some embodiments, three cutting tooth seats 110 are provided on both sides of the tail beam body 200 in the width direction. The three cutting tooth seats 110 on the same side are distributed along the length of the tail beam body 200.

[0034] Three cutting tooth seats 110 are provided on both sides of the main body of the tail beam in the width direction of 200. The three cutting tooth seats 110 can ensure sufficient breaking contact points, and will not cause structural redundancy or affect the normal operation of the tail beam due to excessive number.

[0035] The three cutting tooth seats 110 on the same side are distributed along the length of the tail beam body 200. The spacing between them needs to be set reasonably to ensure that the cutting teeth on adjacent cutting tooth seats can form a continuous crushing area, avoid the occurrence of crushing blind spots, and reserve sufficient space for the coal block to fall after crushing.

[0036] The layout of three cutting tooth seats 110 on each side makes the structural design of the coal breaking mechanism more specific and reasonable, further improving the comprehensiveness and uniformity of coal breaking, effectively avoiding the omission of large coal pieces due to crushing blind spots, while the reasonable interval ensures the smooth transportation of coal after crushing, further improving the continuity and efficiency of the mining process.

[0037] Reference Figure 2 and Figure 3As shown, in some embodiments, among the three cutting tooth seats 110 on the same side, the cutting tooth seat 110 located in the middle extends only along the side away from the width direction of the tail beam body 200 to the outside of the tail beam body 200; the cutting tooth seat 110 located on the side extends to the outside of the tail beam body 200 while also extending to the side away from the middle cutting tooth seat 110.

[0038] Of the three cutting tooth seats 110 on the same side, the middle cutting tooth seat 110 extends only along the side opposite to the width direction of the tail beam body 200 towards the outside of the tail beam body 200. The extension direction of the middle cutting tooth seat is mainly aimed at the coal blocks in the middle area of ​​the scraper conveyor, ensuring the coal breaking effect in the core transportation area. The side cutting tooth seats 110 extend towards the outside of the tail beam body 200, and also extend away from the middle cutting tooth seat 110. The bidirectional extension design of the side cutting tooth seats can cover the coal blocks in the edge areas on both sides of the scraper conveyor, avoiding large pieces of coal in the edge areas from getting stuck because they cannot contact the cutting teeth 120.

[0039] Among the three cutting tooth seats 110 on the same side, the axis of the cutting tooth seat 110 located in the middle is used as the reference line. The axis of the cutting tooth seat 110 located on the side forms a certain angle with the reference line, with the angle being 15-30°. This structure allows the three cutting teeth 120 on the same side to cover the coal blocks in the edge areas on both sides of the scraper conveyor, avoiding large pieces of coal in the edge areas from getting stuck because they cannot contact the cutting teeth 120.

[0040] The differentiated extension design and fan-shaped distribution of the central and side cutting tooth seats 110 further expand the coverage of the coal breaking mechanism, enabling it to accurately adapt to the movement trajectory and distribution characteristics of coal blocks on the scraper conveyor. Large coal blocks, whether in the central core area or the side edge areas, can be effectively broken, greatly reducing the risk of blockage and improving the breaking efficiency, thus further ensuring the continuity of mining operations.

[0041] Reference Figure 2 and Figure 3 As shown, in some embodiments, the coal breaking mechanism 100 further includes a gangue blocking device 130; The gangue blocking device 130 is located at the end of the tail beam body 200. The gangue blocking device 130 is used to shield the motor of the hydraulic support to prevent gangue and coal from hitting the motor.

[0042] The coal breaking mechanism 100 also includes a rock-blocking device 130, which cooperates with the cutting tooth structure.

[0043] The rock-blocking device 130 is installed at the end of the tail beam body 200. This installation position allows the rock-blocking device to precisely cover the motor area of ​​the hydraulic support, achieving targeted protection. The rock-blocking device 130 is used to shield the motor of the hydraulic support to prevent rock and coal from impacting the motor, avoiding equipment failure due to motor damage from impact, and reducing maintenance costs and downtime risks.

[0044] By adding a rock-blocking device 130, the coal crushing mechanism not only has the core function of crushing large pieces of coal, but also has the function of equipment protection. This effectively avoids the impact damage of gangue and coal blocks on the motor in the coal mine, reduces the equipment failure rate and maintenance costs, extends the service life of the motor, and ensures the overall stability of the hydraulic support operation.

[0045] Reference Figure 2 and Figure 3 As shown, in some embodiments, the waste rock blocking device 130 includes a telescopic mechanism 131 and a waste rock blocking plate 132; One end of the baffle plate 132 is hinged to the end of the tail beam body 200; One end of the telescopic mechanism 131 is hinged to the tail beam body 200, and the other end is hinged to the middle of the baffle plate 132. The telescopic mechanism 131 is used to drive the baffle plate 132 to rotate around its hinge point with the tail beam body 200, so as to move closer to or away from the motor.

[0046] The gangue blocking device 130 includes a telescopic mechanism 131 and a gangue blocking plate 132. The telescopic mechanism provides power support for the movement of the gangue blocking plate, and the gangue blocking plate serves as a direct protective component to block gangue and coal.

[0047] One end of the baffle plate 132 is hinged to the end of the tail beam body 200. This hinged connection allows the baffle plate to rotate flexibly and its position can be adjusted according to the operating status and protection requirements of the tail beam without affecting the normal operation of the tail beam, such as lifting and lowering. One end of the telescopic mechanism 131 is hinged to the tail beam body 200, and the other end is hinged to the middle of the baffle plate 132. The hinge point ensures that the telescopic mechanism can efficiently transmit driving force and achieve smooth rotation of the baffle plate.

[0048] The telescopic mechanism 131 is used to drive the baffle plate 132 to rotate around its hinge point with the tail beam body 200, so as to move closer to or away from the motor, so that the baffle plate 132 can flexibly adjust the protection range and angle according to the actual working scenario, and ensure that the motor can be effectively blocked when the tail beam is in different working positions.

[0049] By hingedly connecting the baffle plate 132 to the tail beam body 200 and cooperating with the telescopic mechanism 131, the baffle plate 132 can be flexibly adjusted, which not only ensures reliable protection of the motor, but also does not interfere with the normal operation of the tail beam.

[0050] Reference Figure 2 and Figure 3 As shown, in some embodiments, the telescopic mechanism 131 is a hydraulic cylinder, the cylinder barrel of which is hinged to the tail beam body 200, and the piston rod of which is hinged to the baffle plate 132.

[0051] The telescopic mechanism 131 is a hydraulic cylinder. The cylinder barrel is hinged to the tail beam body 200, and the piston rod of the hydraulic cylinder is hinged to the baffle plate 132. This connection method can smoothly convert the telescopic movement of the hydraulic cylinder into the rotation of the baffle plate, ensuring the stability and accuracy of the baffle plate adjustment process, while avoiding damage to the connection parts due to concentrated force.

[0052] Reference Figure 2 and Figure 3 As shown, in some embodiments, a reinforcing plate 133 is provided on the side of the baffle plate 132 facing the motor, and multiple reinforcing plates 133 are evenly distributed along the length direction of the baffle plate 132. The reinforcing plate 133 is used to enhance the structural strength of the rock-blocking plate 132.

[0053] A reinforcing plate 133 is provided on the side of the baffle plate 132 facing the motor. The reinforcing plate 133 is fixedly connected to the baffle plate 132 to form a protective structure together, which enhances the impact resistance of the baffle plate 132.

[0054] Multiple reinforcing plates 133 are evenly distributed along the length of the rock-blocking plate 132. This even distribution ensures more uniform stress on the rock-blocking plate 132, preventing excessive local stress that could lead to deformation or damage, and ensuring comprehensive and reliable protection. The reinforcing plates 133 enhance the structural strength of the rock-blocking plate 132, enabling it to withstand the violent impact of rock and coal, maintain its protective performance over a long period, and prevent the motor from losing protection due to damage to the rock-blocking plate.

[0055] By setting evenly distributed reinforcing plates 133 on the rock-blocking plate 132, the structural strength and impact resistance of the rock-blocking plate 132 are significantly improved; it can effectively resist the impact of gangue and coal blocks in the coal mine, avoid deformation or damage of the rock-blocking plate, ensure long-term reliable protection of the motor, further reduce equipment maintenance costs and downtime risks, and improve the operational stability and service life of the coal breaking mechanism and even the hydraulic support as a whole.

[0056] This application embodiment also provides a hydraulic support tail beam, including a tail beam body 200 and a coal breaking mechanism 100 of the hydraulic support tail beam as described above.

[0057] The coal breaking mechanism is integrated into the tail beam body, which adds coal breaking and equipment protection functions to the original coal feeding function of the hydraulic support tail beam, forming an integrated operation structure.

[0058] The hydraulic support tail beam provided in this application integrates the coal breaking mechanism with the main body of the tail beam, enabling the hydraulic support tail beam to have comprehensive functions of coal breaking, anti-blocking and equipment protection. This solves the problem that traditional hydraulic support tail beams can only release coal and cannot handle large coal blockages and motor protection, thus improving the practicality and functionality of the hydraulic support tail beam.

[0059] like Figure 4 As shown, this application embodiment provides another hydraulic support, including the aforementioned hydraulic support tail beam.

[0060] The hydraulic support includes the aforementioned hydraulic support tail beam. The tail beam works in conjunction with other components of the hydraulic support to perform a series of functions in fully mechanized coal mining operations, including support, coal release, and coal breaking. The hydraulic control system of the hydraulic support is compatible with components such as the cylinders in the coal breaking mechanism, enabling precise control of actions such as the rotation of the rock baffle and the raising and lowering of the tail beam, ensuring coordinated operation of all functions.

[0061] The hydraulic support integrating the aforementioned tail beam can adapt to the complex scenarios of top coal caving mining in coal mines and comprehensively address core issues such as large coal blockage and equipment protection.

[0062] By adopting the aforementioned hydraulic support tail beam, the hydraulic support integrates functions such as support, coal release, coal breaking, and equipment protection. This completely solves the pain points of traditional hydraulic supports in top coal caving mining, such as large coal blockage, high manual labor intensity, and easy damage to motors. It eliminates the need for manual intervention to break large coal pieces, reducing safety risks and labor intensity, while also reducing equipment failures and maintenance costs. This significantly improves the efficiency, safety, and overall benefits of coal mine fully mechanized mining operations, and has broad application value.

[0063] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.

[0064] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A coal-breaking mechanism (100) for a hydraulic support tail beam, characterized in that: The coal breaking mechanism (100) is mounted on the tail beam body (200), and the coal breaking mechanism (100) includes a cutting tooth seat (110). The cutting tooth holder (110) is fixedly connected to the tail beam body (200), and the cutting tooth holder (110) is provided with cutting teeth (120). The tips of the cutting teeth (120) extend toward the surface of the scraper conveyor located below the tail beam body (200) for contacting and crushing large pieces of coal located on the scraper conveyor.

2. The coal breaking mechanism of the hydraulic support tail beam according to claim 1, characterized in that: The tail beam body (200) is provided with the cutting tooth seat (110) on both sides in the width direction. One end of the cutting tooth seat (110) is welded and fixed to the tail beam body (200), and the other end extends outward from the tail beam body (200) along the side opposite to the width direction of the tail beam body (200).

3. The coal breaking mechanism of the hydraulic support tail beam according to claim 2, characterized in that: The tail beam body (200) has three cutting tooth seats (110) on both sides in the width direction. The three cutting tooth seats (110) on the same side are distributed along the length direction of the tail beam body (200).

4. The coal breaking mechanism of the hydraulic support tail beam according to claim 3, characterized in that: Of the three cutting tooth seats (110) on the same side, the cutting tooth seat (110) located in the middle extends only outward from the tail beam body (200) along the side away from the width direction of the tail beam body (200); the cutting tooth seat (110) located on the side extends outward from the tail beam body (200) and also extends away from the middle cutting tooth seat (110).

5. The coal-breaking mechanism of the hydraulic support tail beam according to any one of claims 1-4, characterized in that: The coal breaking mechanism (100) also includes a gangue blocking device (130); The rock-blocking device (130) is located at the end of the tail beam body (200). The rock-blocking device (130) is used to shield the motor of the hydraulic support to prevent rock and coal from hitting the motor.

6. The coal breaking mechanism of the hydraulic support tail beam according to claim 5, characterized in that: The rock-blocking device (130) includes a telescopic mechanism (131) and a rock-blocking plate (132). One end of the baffle plate (132) is hinged to the end of the tail beam body (200); One end of the telescopic mechanism (131) is hinged to the tail beam body (200), and the other end is hinged to the middle of the baffle plate (132). The telescopic mechanism (131) is used to drive the baffle plate (132) to rotate around its hinge point with the tail beam body (200) to move closer to or away from the motor.

7. The coal-breaking mechanism of the hydraulic support tail beam according to claim 6, characterized in that: The telescopic mechanism (131) is a hydraulic cylinder, the cylinder barrel of which is hinged to the tail beam body (200), and the piston rod of which is hinged to the baffle plate (132).

8. The coal breaking mechanism of the hydraulic support tail beam according to claim 6, characterized in that: The baffle plate (132) is provided with a reinforcing plate (133) on the side facing the motor, and a plurality of the reinforcing plates (133) are evenly distributed along the length direction of the baffle plate (132); The reinforcing plate (133) is used to enhance the structural strength of the rock-blocking plate (132).

9. A hydraulic support tail beam, characterized in that: It includes a tail beam body (200) and a coal breaking mechanism (100) of a hydraulic support tail beam as described in any one of claims 1-8.

10. A hydraulic support, characterized in that: Includes the hydraulic support tail beam as described in claim 9.

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