Drum shearer with protection function

Abstract

The invention belongs to the technical field of coal mining equipment, and particularly relates to a drum shearer with a protection function. Comprising a drum shearer body, a scraper conveyor is installed at the bottom end of the drum shearer body, a drum arm is installed on the drum shearer body, a crushing roller is rotationally connected to the drum shearer body, and the crushing roller is located above the scraper conveyor; a connecting box is installed above the crushing roller, a blocking removing mechanism is installed in the connecting box, the blocking removing mechanism is connected with two ejector rods, and the ejector rods move along with crushing lines on the crushing roller and are used for discharging coal blocks clamped in the crushing roller; according to the large coal crusher, large coal can be effectively crushed, and clamping stagnation is prevented in the crushing process; the coal mining efficiency is improved, the friction and jacking risks of the bottom of the coal mining machine are reduced, and safe and stable operation of the coal mining machine is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining equipment, and in particular relates to a drum coal mining machine with a protective function. Background Art

[0002] As a key equipment in modern coal mining, the efficiency and safety of the drum shearer are crucial to coal production. However, in actual application, the drum shearer often faces a significant problem when cutting coal: when encountering larger coal blocks, these coal blocks tend to roll down onto the scraper conveyor. Since the scraper conveyor is located at the bottom of the drum shearer, these larger coal blocks tend to accumulate on the scraper conveyor, thereby exerting pressure on the bottom of the drum shearer.

[0003] Specifically, when a large amount of large lumps of coal accumulate on the scraper conveyor, they may cause friction on the bottom of the drum shearer, which will not only reduce the operating efficiency of the shearer, but also cause wear and damage to the shearer parts. More seriously, when the coal lumps are large enough and the accumulation is large enough, they may even lift up the bottom of the drum shearer, causing it to lose stability. This situation will not only affect the continuity of coal mining operations, but may also cause safety accidents and pose a potential threat to personnel and equipment.

[0004] Therefore, it is necessary to provide a new drum coal mining machine with protective function to solve the above-mentioned technical problems. Summary of the invention

[0005] The present invention overcomes the shortcomings of the prior art and proposes a drum coal mining machine with a protective function; the present invention is achieved through the following technical solutions: A drum coal mining machine with a protective function comprises a drum coal mining machine body, a scraper conveyor is installed at the bottom of the drum coal mining machine body, a drum arm is installed on the drum coal mining machine body, a crushing roller is rotatably connected to the drum coal mining machine body, and the crushing roller is located above the scraper conveyor; a connecting box is installed above the crushing roller, a jam removal mechanism is installed inside the connecting box, and the jam removal mechanism is connected to two push rods, which move along the crushing lines on the crushing roller and are used to discharge coal blocks stuck in the crushing roller; The card removal mechanism includes a driving pulley, a driven pulley, a shifting column, an E-shaped rod, a hollow shifting rod, a connecting groove, a lower groove, an upper groove, a hollow slider, a tension spring, a switching block, a lifting spring and a trapezoidal top block; the axis of the crushing roller is fixedly connected with the driving pulley, one side of the connecting box is rotatably connected with the driven pulley, the driving pulley and the driven pulley are connected by a belt transmission, one side of the driven pulley is fixedly connected with a shifting column away from the center of the circle, the top of the connecting box is slidably connected with the E-shaped rod, one end of the E-shaped rod is fixedly connected with the hollow shifting rod, the inner wall of the hollow shifting rod is slidably connected with the shifting column, and the inner wall of the connecting box is symmetrically provided with connecting grooves. The inner wall of the connecting groove is symmetrically provided with a lower groove and an upper groove, and the two ends of the lower groove and the upper groove on the same side are connected; a hollow slider is slidably connected to the inner wall of the connecting groove, a tension spring is fixedly connected to one side of the hollow slider, the tension spring is connected to the inner wall of the connecting groove, the inner wall of the hollow slider is slidably connected to the push rod, and the two ends of the push rod are symmetrically fixedly connected with switching blocks, the inner wall of the switching block is fixedly connected to one end of the lifting spring, and the other end of the lifting spring is fixedly connected to a trapezoidal push block, and the trapezoidal push block is slidably connected to the bottom of the switching block; the other end and the middle end of the E-shaped rod are both extended into the connecting groove, which is used to extend into the hollow slider from the top of the hollow slider to squeeze the push rod downward.

[0006] Furthermore, a slope is provided at the connection point between the lower groove and the upper groove, and one end of the switching block is a chamfered structure.

[0007] Furthermore, drum arms are symmetrically installed on both sides of the drum coal mining machine body, and crushing rollers are symmetrically installed on both sides of the drum coal mining machine body close to the drum arms, and crushing patterns with opposite spiral directions are symmetrically installed on the crushing rollers.

[0008] Furthermore, a transmission mechanism is installed between the drum arm and the crushing roller, and when the drum arm rotates, the crushing roller is driven to rotate through the transmission mechanism.

[0009] Furthermore, the transmission mechanism includes: an extension rod, a driving sprocket and a driven sprocket. A motor is installed inside the drum arm, the motor is connected to the drum on the drum arm, the output end of the motor is fixedly connected to the extension rod, one end of the extension rod is fixedly connected to the driving sprocket, the axis of the crushing roller is fixedly connected to the driven sprocket, and the driving sprocket and the driven sprocket are connected by chain transmission.

[0010] Furthermore, the transmission mechanism also includes a tensioning sprocket; a tensioning sprocket is slidably connected to one side of the drum coal mining machine body, and the driving sprocket, the driven sprocket and the tensioning sprocket are connected by chain transmission. A reset spring is fixedly connected to one side of the drum coal mining machine body close to the tensioning sprocket, and the reset spring is installed in cooperation with the axis of the tensioning sprocket.

[0011] Furthermore, brackets are symmetrically and fixedly connected to both ends of the drum coal mining machine body, and the two brackets are rotatably connected to the crushing roller; and the connecting box is fixedly connected to the two brackets.

[0012] Furthermore, an impact plate is slidably connected to one side of the connection box, and a reciprocating mechanism is installed on the top of the impact plate. Driven by the reciprocating mechanism, the impact plate reciprocates relative to the crushing roller and cooperates with the crushing roller to crush the coal blocks.

[0013] Furthermore, the reciprocating mechanism includes a cross bar and a lever, a cross bar is fixedly connected between the other end and the middle end of the E-shaped rod, the top of the connecting box is rotatably connected to the lever, one end of the lever is slidably connected to the cross bar, and the other end of the lever is slidably connected to the top of the impact plate, and the power arm length of the lever is less than the resistance arm length.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: 1. Improve coal mining efficiency: The coal mining machine can efficiently crush large pieces of coal through the shearing crushing of the crushing roller and the reciprocating impact of the impact plate, thus avoiding the problem of coal mining machine blockage and shutdown caused by oversized coal pieces. This not only significantly improves coal mining efficiency, but also reduces the time loss and cost increase caused by shutdown maintenance.

[0015] 2. Enhance the crushing effect: The symmetrically installed screw-shaped crushing lines with opposite rotation directions on the crushing rollers and the reciprocating motion of the impact plate work together to crush the coal blocks at multiple angles and levels. This crushing method not only improves the crushing effect, but also makes the coal blocks more uniform in particle size after crushing, which is conducive to subsequent transportation and processing.

[0016] 3. Reduce the failure rate: The design of the de-jamming mechanism effectively solves the problem of coal blocks getting stuck between the crushing rollers. The automatic de-jamming and resetting functions of the crushing rollers are realized through the coordinated action of the shifting column, hollow shifting rod, E-type rod, switching block and trapezoidal top block. This not only reduces the failure rate caused by coal block jamming, but also extends the service life of the coal mining machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a drum coal mining machine with a protective function provided by the present invention; Figure 2 This is a schematic diagram of the installation position structure of the crushing roller of the present invention; Figure 3 for Figure 1 The structural schematic diagram of the connection box and the impact plate shown; Figure 4 for Figure 1 The schematic diagram of the structure inside the connection box shown; Figure 5 It is a schematic diagram of the internal structure of the switching block described in the present invention.

[0018] Numbers in the figure: 1. Drum coal mining machine body; 2. Scraper conveyor; 3. Drum arm; 4. Crushing roller; 5. Connecting box; 6. Push rod; 7. Impact plate; 8. Transmission mechanism; 10. Reciprocating mechanism; 81. Extension rod; 82. Driving sprocket; 83. Driven sprocket; 84. Tensioning sprocket; 91. Driving pulley; 92. Driven pulley; 93. Shifting column; 94. E-type rod; 95. Hollow shifting rod; 96. Connecting groove; 97. Lower groove; 98. Upper groove; 99. Hollow slider; 910. Tension spring; 911. Switching block; 912. Lifting spring; 913. Trapezoidal push block; 101. Crossbar; 102. Lever. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0020] See also Figures 1 to 5 The present embodiment proposes a drum coal mining machine with a protective function, and the drum coal mining machine with a protective function includes: a drum coal mining machine body 1, a crushing roller 4, a connecting box 5, an impact plate 7, a transmission mechanism 8, a card removal mechanism and a reciprocating mechanism 10. A scraper conveyor 2 is installed at the bottom end of the drum coal mining machine body 1, drum arms 3 are symmetrically installed on both sides of the drum coal mining machine body 1, crushing rollers 4 are symmetrically installed on both sides of the drum coal mining machine body 1 close to the drum arms 3, and the crushing rollers 4 are symmetrically installed with threaded crushing lines with opposite rotation directions. A connecting box 5 is installed at the top of the crushing roller 4, and a top rod 6 is symmetrically installed inside the connecting box 5. The top rod 6 moves along the crushing roller 4. The crushing pattern moves to discharge the coal blocks stuck in the crushing roller 4; an impact plate 7 is slidably connected to one side of the connecting box 5, and the reciprocating impact plate 7 cooperates with the crushing roller 4 to crush the larger coal blocks; a transmission mechanism 8 is installed between the drum arm 3 and the crushing roller 4, and the crushing roller 4 is driven to rotate by the transmission mechanism 8 when the drum arm 3 rotates; a card removal mechanism is installed inside the connecting box 5, and the card removal mechanism is installed in cooperation with two push rods 6, and the push rods 6 move under the drive of the card removal mechanism; a reciprocating mechanism 10 is installed on the top of the impact plate 7, and the reciprocating mechanism 10 is installed in cooperation with the card removal mechanism, and the impact plate 7 reciprocates relative to the crushing roller 4 under the drive of the reciprocating mechanism 10.

[0021] See also Figure 2The transmission mechanism 8 includes an extension rod 81, a driving sprocket 82, a driven sprocket 83, a tensioning sprocket 84 and a bracket 85. A motor is installed inside the drum arm 3, and the motor is connected to the drum on the drum arm 3. The output end of the motor is fixedly connected to the extension rod 81, and one end of the extension rod 81 is fixedly connected to the driving sprocket 82. Both ends of the drum coal mining machine body 1 are symmetrically fixedly connected to two brackets 85. The crushing roller 4 is rotatably connected between the two brackets 85 on the same side. The driven sprocket 83 is fixedly connected to the axis of the crushing roller 4. A tensioning sprocket 84 is slidably connected to one side of the drum coal mining machine body 1. The driving sprocket 82, the driven sprocket 83 and the tensioning sprocket 84 are connected through chain transmission. A reset spring is fixedly connected to the side of the drum coal mining machine body 1 close to the tensioning sprocket 84. The reset spring is installed in cooperation with the axis of the tensioning sprocket 84. As the drum arm 3 moves, the tensioning sprocket 84 is driven to compress the reset spring.

[0022] See also Figures 2 to 5 The card removal mechanism includes a driving pulley 91, a driven pulley 92, a shifting column 93, an E-shaped rod 94, a hollow shifting rod 95, a connecting groove 96, a lower groove 97, an upper groove 98, a hollow slider 99, a tension spring 910, a switching block 911, a lifting spring 912 and a trapezoidal top block 913; the axis of the crushing roller 4 is located inside the driven sprocket 83 and is fixedly connected to the driving pulley 91, the connecting box 5 is fixedly connected to the two brackets 85, and one side of the connecting box 5 is rotatably connected There is a driven pulley 92, the driving pulley 91 and the driven pulley 92 are connected by a belt transmission, a shifting post 93 is fixedly connected to one side of the driven pulley 92 away from the center of the circle, an E-shaped rod 94 is slidably connected to the top of the connection box 5, one end of the E-shaped rod 94 is fixedly connected to a hollow shifting rod 95, the inner wall of the hollow shifting rod 95 is slidably connected to the shifting post 93, and the inner wall of the connection box 5 is symmetrically provided with connecting grooves 96, and the inner walls of the two connecting grooves 96 are symmetrically provided with lower The two ends of the lower groove 97 and the upper groove 98 on the same side are connected; the inner wall of the connecting groove 96 is slidably connected with a hollow slider 99, and one side of the hollow slider 99 is symmetrically fixedly connected with a tension spring 910, and the two tension springs 910 are connected to the inner wall of the connecting groove 96, and the inner wall of the hollow slider 99 is slidably connected with the push rod 6, and the two ends of the push rod 6 are symmetrically fixedly connected with a switching block 911, and the inner wall of the switching block 911 is fixedly connected with one end of the lifting spring 912, and the lifting spring 91 2 is fixedly connected with a trapezoidal top block 913, which is slidably connected to the bottom of the switching block 911; the switching block 911 slides in the lower groove 97 and the upper groove 98 on the same side; the other end and the middle end of the E-shaped rod 94 are both extended into the interior of the connecting groove 96, which is used to extend into the hollow slider 99 from the top of the hollow slider 99 to squeeze the top rod 6 downward; the connection between the lower groove 97 and the upper groove 98 is provided with an inclined surface, and one end of the switching block 911 is a chamfered structure. When the hollow lever 95 rotates to the middle of the driven pulley 92, the chamfer of the switching block 911 contacts the inclined surface at the connection between the lower groove 97 and the upper groove 98.

[0023] See also Figure 3 The reciprocating mechanism 10 includes: a cross bar 101 and a lever 102. The cross bar 101 is fixedly connected between the other end and the middle end of the E-shaped rod 94. The top of the connecting box 5 is rotatably connected with the lever 102. One end of the lever 102 is slidably connected to the cross bar 101, and the other end of the lever 102 is slidably connected to the top of the impact plate 7. The power arm length of the lever 102 is less than the resistance arm length.

[0024] The working principle of the drum coal mining machine with protective function provided by the present invention is as follows: The drum coal mining machine with protective function is mainly developed around the core components of the drum coal mining machine body 1, crushing roller 4, connecting box 5, impact plate 7, transmission mechanism 8, card removal mechanism and reciprocating mechanism 10, aiming to achieve effective crushing and discharge of large pieces of coal and ensure the safe and stable operation of the coal mining machine. The following are the detailed working principle steps: A. The drum coal mining machine body 1 and the scraper conveyor 2 work together: The drum coal mining machine body 1 performs preliminary collection and transportation of coal blocks through the scraper conveyor 2 at its bottom. During the coal mining process, the drum arm 3 on the drum coal mining machine body 1 rotates to drive the drum to perform coal cutting operations.

[0025] B. Crushing effect of crushing roller 4: When encountering larger coal lumps, these coal lumps will be sent between the crushing rollers 4. The crushing rollers 4 are symmetrically equipped with thread-shaped crushing lines with opposite rotation directions, which generate shear force through rotation to perform preliminary crushing of large coal lumps.

[0026] C. Power transmission of transmission mechanism 8: The transmission mechanism 8 includes an extension rod 81, a driving sprocket 82, a driven sprocket 83 and a tensioning sprocket 84. The motor inside the drum arm 3 drives the extension rod 81 to rotate, thereby driving the driving sprocket 82 to rotate. The driving sprocket 82 is connected to the driven sprocket 83 (installed at the axis of the crushing roller 4) and the tensioning sprocket 84 (used to adjust the tension of the chain) through a chain, so as to realize the transmission of the rotational power of the crushing roller 4.

[0027] D. Anti-blocking function of card removal mechanism: Belt drive and shifting post 93 effects: driving pulley 91 is connected with driven pulley 92 by belt drive. Shifting post 93 is fixed on driven pulley 92, and along with the rotation of belt, shifting post 93 also rotates.

[0028] The lever 93 drives the hollow lever 95 and the E-shaped rod 94: during the rotation process, the lever 93 will contact the inner wall of the hollow lever 95 and drive it to reciprocate up and down. The hollow lever 95 is fixedly connected to the E-shaped rod 94, so the E-shaped rod 94 will also move with the reciprocating up and down motion of the hollow lever 95.

[0029] Movement of the push rod 6 and the switching block 911: The movement of the E-type rod 94 is transmitted to the push rod 6 through the mechanism in the connecting box 5: the other end and the middle end of the E-type rod 94 are both extended into the connecting groove 96, and the top of the hollow slider 99 on the corresponding side is extended into the hollow slider 99 to squeeze the push rod 6 downward; the two switching blocks 911 enter the lower groove 97, and the bottom of the push rod 6 moves from one end of the lower groove 97 to the other end under the action of the crushing roller 4. At this time, under the action of the trapezoidal push block 913, the switching block 911 is lifted and enters the upper groove 98, and then under the action of the tension spring 910, the switching block 911 on the push rod 6 moves from one end of the upper groove 98 to the other end, and at this time, it enters the lower groove 97 again under the extrusion of the E-type rod 94, and repeats the movement in a U-shaped pattern.

[0030] Specifically, a lifting spring 912 and a trapezoidal top block 913 are fixed on the switching block 911 to realize the reset and lifting functions of the top rod 6. When the switching block 911 is in the upper groove 98, the two tension springs 910 pull the switching block 911 to reset (at this time, the distance between the two top rods 6 is the largest). With the reciprocating motion of the E-shaped rod 94, the top rod 6 descends into the lower groove 97 and moves along the crushing lines on the crushing roller 4. When the distance between the two top rods 6 is the shortest, the trapezoidal top block 913 is lifted by the lifting spring 912 and enters the upper groove 98 to prepare for the next cycle.

[0031] E. Impact crushing effect of reciprocating mechanism 10: The up and down reciprocating motion of the E-shaped rod 94 drives the crossbar 101 to reciprocate up and down, thereby acting on the lever 102, causing the impact plate 7 to reciprocate around the connection with the lever 102. The reciprocating motion of the impact plate 7 will further impact and crush the large coal, ensuring that the coal can be smoothly crushed and discharged.

[0032] F. Safety reset and adjustment: In order to ensure the stable operation of the transmission mechanism 8, a return spring is installed on one side of the drum coal mining machine body 1 close to the tensioning sprocket 84. When the drum arm 3 moves, the tensioning sprocket 84 will compress the return spring, adjust the tension of the chain, and ensure the stability and reliability of the transmission mechanism 8.

[0033] Overall synergy and efficiency improvement: Through the coordinated work of the above components, the drum coal shearer of the present invention can effectively crush large pieces of coal and prevent jamming during the crushing process. This not only improves the coal mining efficiency, but also reduces the friction and jacking risk at the bottom of the coal shearer, ensuring the safe and stable operation of the coal shearer.

[0034] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A drum coal mining machine with a protective function, comprising a drum coal mining machine body (1), a scraper conveyor (2) being installed at the bottom end of the drum coal mining machine body (1), and a drum arm (3) being installed on the drum coal mining machine body (1), characterized in that: A crushing roller (4) is rotatably connected to a drum coal mining machine body (1), and the crushing roller (4) is located above a scraper conveyor (2); a connecting box (5) is installed above the crushing roller (4), and a jam removal mechanism is installed inside the connecting box (5). The jam removal mechanism is connected to two push rods (6), and the push rods (6) move along the crushing lines on the crushing roller (4) to discharge coal blocks stuck in the crushing roller (4); The card removal mechanism comprises a driving pulley (91), a driven pulley (92), a shifting column (93), an E-shaped rod (94), a hollow shifting rod (95), a connecting groove (96), a lower groove (97), an upper groove (98), a hollow slider (99), a tension spring (910), a switching block (911), a lifting spring (912) and a trapezoidal top block (913); the axis of the crushing roller (4) is fixedly connected to the driving pulley (91), and one side of the connecting box (5) is rotatably connected to the driven pulley (92 ), a driving pulley (91) and a driven pulley (92) are connected via a belt transmission, a shifting column (93) is fixedly connected to one side of the driven pulley (92) away from the center of the circle, an E-shaped rod (94) is slidably connected to the top of the connection box (5), one end of the E-shaped rod (94) is fixedly connected to a hollow shifting rod (95), the inner wall of the hollow shifting rod (95) is slidably connected to the shifting column (93), and the inner wall of the connection box (5) is symmetrically provided with connecting grooves (96), and the inner walls of the connecting grooves (96) are respectively A lower groove (97) and an upper groove (98) are symmetrically provided, and the two ends of the lower groove (97) and the upper groove (98) on the same side are connected; a hollow slider (99) is slidably connected to the inner wall of the connecting groove (96), and a tension spring (910) is fixedly connected to one side of the hollow slider (99), and the tension spring (910) is connected to the inner wall of the connecting groove (96), and the inner wall of the hollow slider (99) is slidably connected to the top rod (6), and the two ends of the top rod (6) are symmetrically fixedly connected to the switching block (911), and the inner wall of the switching block (911) is fixedly connected to the top rod (6). One end of the lifting spring (912) is fixedly connected, and the other end of the lifting spring (912) is fixedly connected to a trapezoidal top block (913), and the trapezoidal top block (913) is slidably connected to the bottom of the switching block (911); the switching block (911) slides in the lower groove (97) and the upper groove (98) on the same side; the other end and the middle end of the E-shaped rod (94) are both extended into the interior of the connecting groove (96), and are used to extend from the top of the hollow slider (99) into the hollow slider (99) to press the top rod (6) downward.

2. A drum coal mining machine with a protective function according to claim 1, characterized in that: An inclined surface is provided at the connection point between the lower groove (97) and the upper groove (98), and one end of the switching block (911) is a chamfered angle structure.

3. The drum coal mining machine with protective function according to claim 1, characterized in that: Drum arms (3) are symmetrically mounted on both sides of the drum coal mining machine body (1), crushing rollers (4) are symmetrically mounted on both sides of the drum coal mining machine body (1) close to the drum arms (3), and the crushing rollers (4) are symmetrically mounted with screw-shaped crushing patterns with opposite rotation directions.

4. A drum coal mining machine with a protective function according to claim 3, characterized in that: A transmission mechanism (8) is installed between the drum arm (3) and the crushing roller (4). When the drum arm (3) rotates, the crushing roller (4) is driven to rotate through the transmission mechanism (8).

5. A drum coal mining machine with a protective function according to claim 4, characterized in that: The transmission mechanism (8) comprises an extension rod (81), a driving sprocket (82) and a driven sprocket (83); a motor is installed inside the drum arm (3); the motor is drivingly connected to the drum on the drum arm (3); the output end of the motor is fixedly connected to the extension rod (81); one end of the extension rod (81) is fixedly connected to the driving sprocket (82); the axis of the crushing roller (4) is fixedly connected to the driven sprocket (83); the driving sprocket (82) and the driven sprocket (83) are connected via a chain transmission.

6. The drum coal mining machine with protective function according to claim 5, characterized in that: The transmission mechanism (8) further comprises a tensioning sprocket (84); a tensioning sprocket (84) is slidably connected to one side of the drum coal mining machine body (1); the driving sprocket (82), the driven sprocket (83) and the tensioning sprocket (84) are connected via a chain transmission; a return spring is fixedly connected to one side of the drum coal mining machine body (1) close to the tensioning sprocket (84); the return spring is mounted in cooperation with the axis of the tensioning sprocket (84).

7. The drum coal mining machine with protective function according to claim 3, characterized in that: Two brackets (85) are symmetrically and fixedly connected to both ends of the drum coal mining machine body (1); the crushing roller (4) is rotatably connected between the two brackets (85) on the same side; and the connection box (5) is fixedly connected to the two brackets (85).

8. The drum coal mining machine with protective function according to claim 1, characterized in that: A strike plate (7) is slidably connected to one side of the connection box (5). A reciprocating mechanism (10) is installed on the top of the strike plate (7). Driven by the reciprocating mechanism (10), the strike plate (7) reciprocates relative to the crushing roller (4) and cooperates with the crushing roller (4) to crush the coal blocks.

9. The drum coal mining machine with protective function according to claim 8, characterized in that: The reciprocating mechanism (10) comprises a cross bar (101) and a lever (102); the cross bar (101) is fixedly connected between the other end and the middle end of the E-shaped rod (94); the top end of the connecting box (5) is rotatably connected to the lever (102); one end of the lever (102) is slidably connected to the cross bar (101); the other end of the lever (102) is slidably connected to the top end of the impact plate (7); and the power arm length of the lever (102) is less than the resistance arm length.

Images