Coal mining machine roller cold charging gear sleeve dismounting device

Abstract

The invention belongs to the technical field of coal mining machine dismounting instruments, and particularly relates to a coal mining machine roller cold assembly gear sleeve dismounting device which comprises an annular mounting disc and a mounting seat rotationally arranged on the inner side of the annular mounting disc, and further comprises a fixing unit mounted on the side wall of the annular mounting disc, the annular mounting disc is connected with the end part of a roller of the coal mining machine through a fixing unit; the mechanical arm is fixed to the side wall of the mounting base, and a mounting plate is fixed to the end, away from the mounting base, of the mechanical arm; the round sleeve is arranged on the side, away from the mechanical arm, of the mounting plate, the mounting plate is provided with a moving driving mechanism for driving the round sleeve to move, and a knocking mechanism is mounted on the side wall of the round sleeve. The device can adapt to the complex and narrow underground environment, the gear sleeve can be detached without ground support, the gear sleeve and the gear holder can be prevented from being meshed too tightly, the risk of damage to parts is reduced, meanwhile, the drawing force balance can be guaranteed, and the gear sleeve detaching smoothness and efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of coal mining machine disassembly equipment, and in particular relates to a disassembly device for cold-installed tooth sleeves of a coal mining machine drum. Background Technology

[0002] The cutting tooth sleeve of the coal mining machine is a key component connecting the cutting tooth and the tooth seat. During underground operations, it must withstand the impact of coal and rock cutting and abrasive wear, which can easily lead to wear, deformation, breakage or adhesion failure. If it is not replaced in time, it will cause uneven force on the cutting tooth, reduced cutting efficiency, and may also damage the tooth seat, affecting the normal operation of the coal mining machine. Therefore, it needs to be disassembled and replaced regularly.

[0003] Currently, the gear sleeves of coal mining machines are usually installed and removed cold. When disassembling the gear sleeve, the tail of the gear sleeve is hammered off. However, this method is time-consuming and labor-intensive. Now, more convenient tools are usually used to assist in disassembly, such as the coal mining machine drum cold-installed gear sleeve disassembly device disclosed in patent announcement number CN205764725U. However, the above-mentioned disassembly device still relies on manual operation. In the dark and confined environment underground, the operation is relatively difficult. At the same time, since the cutting part of the coal mining machine rotates in the same direction for a long time, the gear sleeve is always subjected to unidirectional cutting impact and abrasive wear, which can easily cause uneven wear, plastic deformation and metal seizing of the mating surface. This leads to the gear sleeve and the gear seat being too tight, greatly increasing the difficulty of disassembly, and even causing damage to the gear seat or gear sleeve during the disassembly process. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a device for disassembling the cold-mounted tooth sleeve of a coal mining machine drum.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coal mining machine drum cold-fitting tooth sleeve disassembly device, comprising an annular mounting plate and a mounting seat rotatably disposed inside the annular mounting plate, and further comprising: A fixing unit is installed on the side wall of the annular mounting plate, and the annular mounting plate is connected to the end of the drum of the coal mining machine through the fixing unit; A robotic arm is fixed to the side wall of the mounting base, and a mounting plate is fixed to the end of the robotic arm away from the mounting base; A circular sleeve is disposed on the side of the mounting plate away from the robotic arm. The mounting plate is equipped with a driving mechanism for moving the circular sleeve, and a striking mechanism is installed on the side wall of the circular sleeve. A gripper mechanism is installed at the bottom of the circular sleeve; A drive unit is installed on the side wall of the circular sleeve, and the drive unit drives the striking mechanism and the gripper mechanism to work.

[0006] Preferably, the fixing unit includes several sets of sliding blocks, the side wall of the annular mounting plate is provided with multiple annularly distributed arc-shaped holes, and the sliding blocks of the same set are slidably disposed inside the arc-shaped holes on the same side. A screw is threadedly connected to the sliding block, and a locking block is rotatably connected to the end of the screw. A sliding rod is fixed to the side wall of the sliding block, and the locking block is slidably connected to the sliding rod.

[0007] Preferably, the driving mechanism includes an electromagnetic push rod fixedly inserted into the end face of the mounting plate, and a movable plate is fixed to the movable end of the electromagnetic push rod, with the circular sleeve fixed to the side wall of the movable plate.

[0008] Preferably, the striking mechanism includes annularly distributed arc-shaped striking blocks inside the circular sleeve, and the inner arc surface of the arc-shaped striking blocks is inclined. The outer wall of the circular sleeve is provided with multiple mounting grooves, and a T-shaped rod is slidably connected to the bottom of the mounting groove. The end of the T-shaped rod is fixedly connected to the side wall of the arc-shaped striking block. A spring is fixed between the T-shaped rod and the mounting groove. A hemispherical protrusion is fixed to the end of the T-shaped rod away from the arc-shaped striking block.

[0009] Preferably, the gripper mechanism includes multiple grooves formed on the side wall of the circular sleeve, the lower side wall of the groove is rotatably connected to a rotating shaft, and the lower end of the rotating shaft is fixed with a gripper block. Multiple winding assemblies are fixed on the side wall of the mounting base, each winding assembly is wound with steel strand, and the end of the steel strand away from the winding assembly slides through the mounting plate, the moving plate and the circular sleeve, and is rotatably connected to the top of the rotating shaft.

[0010] Preferably, a torque sensor is installed on the side wall of the winding assembly, and the torque sensor is used to detect the rotational torque of the drive end of the winding assembly.

[0011] Preferably, the driving unit includes a driving sleeve that rotates on the outside of the circular sleeve. A rotating protrusion with the same height as the hemispherical protrusion is fixed on the inner side wall of the driving sleeve. A lower gear is fixed on the shaft wall of the rotating shaft and meshes with the inner wall of the driving sleeve. A through hole is opened on the side wall of the circular sleeve, and an upper gear is arranged inside the through hole. The upper gear meshes with the driving sleeve. A motor assembly for driving the upper gear to rotate is installed on the movable plate.

[0012] Preferably, a position switch is fixed to the bottom of the movable plate, and a positioning block is fixed to the upper surface of the upper gear.

[0013] Compared with existing technologies, the advantages of a coal mining machine drum cold-fitting gear sleeve disassembly device are: 1. Through the coordinated operation of the ring mounting plate, mounting base, fixing unit, and robotic arm, the entire device can be installed at the end of the drum of the coal mining machine cutting section when disassembling the cold-fitted tooth sleeve. It is suitable for disassembling the tooth sleeve in complex and confined underground environments without ground support. At the same time, the robotic arm can automatically align and disassemble the tooth sleeve, reducing manual intervention, greatly improving disassembly efficiency, and making it convenient to use.

[0014] 2. Through the cooperation of the mounting plate, circular sleeve, driving mechanism and tapping mechanism, the tooth sleeve can be tapped evenly when disassembling it, so as to prevent the tooth sleeve from being affected by the long-term unidirectional force of the cutting tooth and the tooth seat being too tight, which would affect the disassembly and reduce the possibility of damage to the tooth sleeve and tooth seat.

[0015] 3. The set gripper mechanism can use the tooth shoulder position of the tooth sleeve as a fulcrum to pull out and disassemble the tooth sleeve. At the same time, with the set torque sensor, the pull force can be applied to multiple points individually to ensure the balance of the pull force applied to each position of the tooth sleeve, which helps to improve the smoothness of tooth sleeve disassembly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a coal mining machine drum cold-fitting tooth sleeve disassembly device provided by the present invention; Figure 2 This is a schematic diagram of the fixing unit of a coal mining machine drum cold-fitting tooth sleeve disassembly device provided by the present invention; Figure 3 This is a schematic diagram of the internal structure of the circular sleeve of a coal mining machine drum cold-fitting tooth sleeve disassembly device provided by the present invention; Figure 4 This is a three-dimensional structural diagram of the circular sleeve of a coal mining machine drum cold-fitting tooth sleeve disassembly device provided by the present invention; Figure 5 This is a schematic diagram of the internal structure of the drive sleeve of a coal mining machine drum cold-fitting tooth sleeve disassembly device provided by the present invention; Figure 6 This is a schematic diagram of the connection structure between the round sleeve and the drive sleeve of a coal mining machine drum cold-fitting tooth sleeve disassembly device provided by the present invention; Figure 7 This invention provides a device for disassembling the cold-fitting gear sleeve of a coal mining machine drum. Figure 6 Enlarged view of the structure of section A; Figure 8 This is a schematic diagram of the connection structure between the tooth base, tooth sleeve, and cutting tooth.

[0017] In the diagram: 1. Annular mounting plate, 2. Mounting base, 3. Fixing unit, 31. Sliding block, 32. Arc-shaped hole, 33. Screw, 34. Locking block, 35. Slide rod, 4. Mechanical arm, 5. Mounting plate, 6. Circular sleeve, 7. Drive mechanism, 71. Electromagnetic push rod, 72. Moving plate, 8. Tapping mechanism, 81. Arc-shaped tapping block, 82. Mounting groove, 83. T-shaped rod, 84. Spring, 85. Hemispherical protrusion, 9. Grip mechanism, 91. Groove, 92. Rotating shaft, 93. Grip block, 94. Winding assembly, 95. Steel strand, 10. Drive unit, 101. Drive sleeve, 102. Rotating protrusion, 103. Lower gear, 104. Through hole, 105. Upper gear, 106. Motor assembly, 11. Torque sensor, 12. Position switch, 13. Positioning block. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] like Figures 1-8 As shown, a coal mining machine drum cold-fitting tooth sleeve disassembly device includes an annular mounting plate 1 and a mounting seat 2 rotatably disposed inside the annular mounting plate 1. It also includes a fixing unit 3, which is installed on the side wall of the annular mounting plate 1. The annular mounting plate 1 is connected to the end of the coal mining machine drum through the fixing unit 3. The fixing unit 3 includes several sets of sliding blocks 31. The side wall of the annular mounting plate 1 is provided with multiple annularly distributed arc-shaped holes 32. The sliding blocks 31 of the same set are slidably disposed inside the arc-shaped holes 32 on the same side. A screw 33 is threadedly connected to the sliding block 31. A locking block 34 is rotatably connected to the end of the screw 33. A sliding rod 35 is fixed to the side wall of the sliding block 31. The locking block 34 is slidably connected to the sliding rod 35, which facilitates fixing the entire device to the end of the cutting drum.

[0020] The robotic arm 4 is fixed to the side wall of the mounting base 2. The end of the robotic arm 4 away from the mounting base 2 is fixed with a mounting plate 5. The circular sleeve 6 is set on the side of the mounting plate 5 away from the robotic arm 4. The mounting plate 5 is equipped with a driving mechanism 7 that drives the circular sleeve 6 to move. The driving mechanism 7 includes an electromagnetic push rod 71 fixedly inserted into the end face of the mounting plate 5, and a moving plate 72 is fixed to the movable end of the electromagnetic push rod 71. The circular sleeve 6 is fixed to the side wall of the moving plate 72. The robotic arm 4 adopts a multi-axis robotic arm to ensure that when the end of the cutting drum of the coal mining machine is used as the base point, the robotic arm 4 can drive the circular sleeve 6 to cover all the toothed sleeves. At the same time, the side wall of the main body of the robotic arm 4 is opened with waist holes, which not only reduces the overall weight and facilitates installation, but also helps to relieve structural stress when the robotic arm 4 is under force.

[0021] A striking mechanism 8 is installed on the side wall of the sleeve 6. The striking mechanism 8 includes arc-shaped striking blocks 81 evenly distributed in a ring inside the sleeve 6. The inner arc surface of the arc-shaped striking blocks 81 is inclined. Multiple mounting grooves 82 are opened on the outer side wall of the sleeve 6. A T-shaped rod 83 is slidably connected to the bottom of the mounting groove 82. The rod end of the T-shaped rod 83 is fixedly connected to the side wall of the arc-shaped striking blocks 81. A spring 84 is fixed between the T-shaped rod 83 and the mounting groove 82. A hemispherical protrusion 85 is fixed at the end of the T-shaped rod 83 away from the arc-shaped striking blocks 81. The inner arc surface of the arc-shaped striking blocks 81 matches the conical surface of the shoulder of the toothed sleeve.

[0022] The gripper mechanism 9 is installed at the bottom of the sleeve 6. The gripper mechanism 9 includes multiple grooves 91 formed on the side wall of the sleeve 6. The lower side wall of the groove 91 is rotatably connected to the rotating shaft 92, and the lower end of the rotating shaft 92 is fixed with a gripper block 93. Multiple winding assemblies 94 are fixed on the side wall of the mounting base 2. Each winding assembly 94 is wound with steel strand 95. The end of the steel strand 95 away from the winding assembly 94 slides through the mounting plate 5, the moving plate 72 and the sleeve 6, and is rotatably connected to the top of the rotating shaft 92. The winding assembly 94 includes components such as a winding motor, a winding shaft, a winding wheel, and bearings. The robotic arm 4 is equipped with limit blocks to limit the movement of the steel strand 95. The steel strand 95 slides with these limit blocks to prevent it from shaking randomly.

[0023] A torque sensor 11 is installed on the side wall of the winding assembly 94. The torque sensor 11 is used to detect the rotational torque at the drive end of the winding assembly 94. The torque sensor 11 converts the torque into an electrical signal and feeds it back to the PLC controller. The torque sensor 11 can detect the tension when the winding assembly 94 winds up the steel strand 95. The PLC controller compares the signal strengths fed back by each torque sensor 11 in real time and determines the signal with the lowest strength. Then, based on the torque force corresponding to the torque sensor 11, it controls the operation of the other winding assemblies 94. Taking the initial tension of the steel strand 95 as an example, the torque sensor 11 corresponding to the first tensioned steel strand 95 detects... If the measured torque is too high, while the torque detected by the torque sensor 11 corresponding to the remaining unstretched steel strands 95 is too low, the PLC controller compares the signal fed back by the torque sensor 11 with the lowest torque and controls the winding assembly 94 corresponding to the torque sensor 11 with the higher torque to reduce the output power and reduce the torque. Then the winding assembly 94 continues to work, and the torque detected by the torque sensor 11 with the lowest torque will continue to increase. At this time, the other winding assemblies 94 also increase the tension on the steel strands 95 in sync, so that each winding assembly 94 applies almost the same tension to the steel strands 95, ensuring the uniformity of the pull force applied to each steel strand 95.

[0024] The drive unit 10 is installed on the side wall of the sleeve 6, and the drive unit 10 drives the striking mechanism 8 and the gripper mechanism 9 to work. The drive unit 10 includes a drive sleeve 101 that rotates on the outside of the sleeve 6. A rotating protrusion 102 with the same height as the hemispherical protrusion 85 is fixed on the inner side wall of the drive sleeve 101. A lower gear 103 is fixed on the shaft wall of the rotating shaft 92, and the lower gear 103 meshes with the inner wall of the drive sleeve 101. A through hole 104 is opened on the side wall of the sleeve 6, and an upper gear 105 is arranged inside the through hole 104. The upper gear 105 meshes with the drive sleeve 101. A motor assembly 106 that drives the upper gear 105 to rotate is installed on the moving plate 72. The motor assembly 106 includes a motor, a drive shaft, bearings and other components.

[0025] A position switch 12 is fixed at the bottom of the movable plate 72, and a positioning block 13 is fixed on the upper surface of the upper gear 105. The position switch 12 can detect the position of the positioning block 13. Specifically, the position switch 12 emits a light beam and receives the light beam reflected by the positioning block 13, and then feeds back an electrical signal to the PLC controller.

[0026] The operating principle of this invention is explained as follows: Before removing the coal mining machine tooth sleeve from the tooth holder, the cutting tooth is first removed (see...). Figure 8 In the diagram, E represents the tooth seat, F represents the tooth sleeve, and G represents the cutting tooth. Then, the entire device is placed on one side of the drum of the coal mining machine's cutting section. Next, the arc-shaped hole 32 on the side wall of the annular mounting plate 1 is aligned with the arc-shaped waist hole of the cutting section drum (the arc-shaped waist hole of the cutting section drum can be used to install the drum, reduce stress, etc., and the arc-shaped hole 32 on the side wall of the annular mounting plate 1 matches the arc-shaped waist hole of the drum). Then, each set of sliding blocks 31 is moved so that the two sliding blocks 31 in the same set are respectively on both sides of the arc-shaped hole 32. Then, the screw 33 is turned, and with the cooperation of the sliding rod 35, the locking block 34 will move towards the inner wall of the drum until the locking block 34 abuts against the inner wall of the drum, thereby fixing the mounting seat 2 to the side wall of the cutting section drum. Then, the entire device is connected to the external PLC controller through the cable (the cable mainly powers the entire device, and the PLC controller receives the signals sent by the entire device and sends control signals to the entire device), and the PLC controller is started. Input the number of the toothed sleeve to be removed into the PLC controller. Initially, the mounting base 2 is in the zero position of the annular mounting plate 1. At this time, according to the toothed sleeve number input into the PLC controller, the drive unit 10 on the side wall of the circular sleeve 6 will drive the mounting base 2 to rotate a preset angle according to the program. Then, the robotic arm 4 controls the mounting plate 5 to align with the toothed sleeve to be removed according to the program. At this time, the circular sleeve 6 is coaxial with the toothed sleeve. Then, the PLC controller controls the electromagnetic push rod 71 to be energized. The electromagnetic push rod 71 will push the moving plate 72 to move towards the toothed sleeve, so that the circular sleeve 6 can be placed on the outside of the toothed sleeve. Then, the PLC controller controls the motor assembly 106 to work (the motor assembly 106 includes components such as a motor, drive shaft, and bearings). The motor assembly 106 drives the upper gear 105 to rotate. The upper gear 105 will drive the drive sleeve 101 to drive the rotating protrusion 102 to rotate. The rotating protrusion 102 is in During the rotation, the hemispherical protrusions 85 at the ends of each T-shaped rod 83 are squeezed in sequence. When the hemispherical protrusions 85 are squeezed by the rotating protrusion 102, they move into the mounting groove 82. At this time, the hemispherical protrusions 85 drive the arc-shaped striking blocks 81 to move through the T-shaped rods 83, so that the arc-shaped striking blocks 81 can strike the shoulder of the tooth sleeve. Through the rotation of the rotating protrusion 102, each arc-shaped striking block 81 strikes the tooth sleeve in sequence, thereby generating high-frequency, uniform circumferential impact vibration. This breaks the oxide scale and embedded coal and rock fragments formed on the mating surface of the tooth sleeve and the tooth seat due to unidirectional force, breaks the metal bite and stubborn adhesion. At the same time, the continuous impact can gradually offset the friction of the interference fit, creating a small gap between the tooth sleeve and the tooth seat, creating conditions for the subsequent pull-out action. This avoids the deformation of the parts caused by hard pulling and can efficiently loosen the tooth sleeve, ensuring that the disassembly process is stable and controllable. During the operation of the motor assembly 106, when the upper gear 105 drives the drive sleeve 101 to rotate, the drive sleeve 101 drives each lower gear 103 to rotate. The lower gears 103 then drive the gripper blocks 93 to rotate via the rotating shaft 92. After the motor assembly 106 has been operating for one minute, it begins to decelerate according to a preset program. At the same time, the position switch 12 starts to operate. When the positioning block 13 at the upper gear 105 rotates to the position switch 12, the position switch 12 sends an electrical signal to the PLC controller (the position switch 12 sends an electrical signal to the PLC controller after emitting a light beam and receiving the light beam reflected by the positioning block 13). The PLC controller immediately controls the motor assembly 106 to stop operating. At this time, the end of each gripper block 93 away from the rotating shaft 92 rotates to below the shoulder of the gear sleeve (the diameter of the tooth shoulder of the gear sleeve is larger than the diameter of the top of the gear seat, that is, a stepped groove is formed at the connection between the tooth shoulder of the gear sleeve and the top of the gear seat). At this time, the PLC controller controls each winding... Component 94 starts working and controls the electromagnetic push rod 71 to be de-energized. The winding component 94 will wind up the steel strand 95 (the winding component 94 includes a winding motor, winding shaft, winding wheel, bearings, etc.). The steel strand 95 drives the gripper block 93 through the rotating shaft 92 to apply an outward pulling force to the toothed sleeve. The torque sensor 11 can monitor the torque at the winding motor of the winding component 94 in real time. The PLC controller controls the operation of each winding component 94 according to the torque signals fed back by each torque sensor 11. The PLC controller uses the minimum torque signal fed back in real time as the standard to control the winding motor of the remaining winding components 94 to adjust the output torque. For example, the torque signal strength fed back by each torque sensor 11 is recorded as T1, T2, T3, and T4. When T1 is the minimum, the PLC controller controls the winding components 94 corresponding to T2, T3, and T4 to reduce the torque until T2, T3, and T4 are equivalent to T1 (the difference in the current signal strength corresponding to the torque signal is ±0).(1mA) On the one hand, the winding assembly 94 applies individual tension to the gripper blocks 93 at each position to avoid localized stubborn adhesion of the toothed sleeve due to unidirectional force. On the other hand, by controlling the tension at each position to be balanced, it ensures that the toothed sleeve bears a coaxial and uniform pull-out force, avoiding deformation of the toothed sleeve and scratches on the tooth base caused by uneven pulling. At the same time, it allows the interference friction of the mating surface to be released evenly, facilitating the smooth release of the toothed sleeve. When the torque signal fed back by each torque sensor 11 reaches the threshold, it indicates that the toothed sleeve has not been pulled out. At this time, the PLC controller controls each winding assembly 94 to stop working, and at the same time, the PLC controller controls the electromagnetic push rod 71 to resume working and restart the motor assembly 106, repeating the above steps to re-tapping and... In the removal process, if the same toothed sleeve fails to be removed after three consecutive attempts, the PLC controller will issue audible and visual alerts to remind the operator to check the sleeve, thus reducing wasted time. Once the sleeve is successfully removed, the PLC controller de-energizes the electromagnetic push rod 71 and stops the winding assembly 94. Subsequently, it controls the robotic arm 4 to return to its original position. After the operator removes the sleeve from between the gripper blocks 93, the removal of the next sleeve can begin. This dismantling robot, with the robotic arm 4 as its main component, is suitable for removing sleeves in complex and confined underground environments. The robotic arm 4 can automatically complete the removal of sleeves based on pre-entered numbers, significantly reducing manual intervention, improving efficiency, lowering difficulty, and offering ease of use.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A disassembly device for cold-fitting tooth sleeves of a coal mining machine drum, comprising an annular mounting plate (1) and a mounting seat (2) rotatably disposed inside the annular mounting plate (1), characterized in that, Also includes: The fixing unit (3) is installed on the side wall of the annular mounting plate (1), and the annular mounting plate (1) is connected to the end of the drum of the coal mining machine through the fixing unit (3); A robotic arm (4) is fixed to the side wall of the mounting base (2), and a mounting plate (5) is fixed to the end of the robotic arm (4) away from the mounting base (2). A circular sleeve (6) is disposed on the side of the mounting plate (5) away from the robotic arm (4). The mounting plate (5) is equipped with a driving mechanism (7) for moving the circular sleeve (6). A striking mechanism (8) is installed on the side wall of the circular sleeve (6). A gripper mechanism (9) is installed at the bottom of the circular sleeve (6); The drive unit (10) is installed on the side wall of the sleeve (6), and the drive unit (10) drives the striking mechanism (8) and the gripper mechanism (9) to work.

2. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 1, characterized in that, The fixing unit (3) includes several sets of sliding blocks (31). The side wall of the annular mounting plate (1) is provided with multiple annularly distributed arc holes (32). Two sliding blocks (31) in the same set are slidably disposed inside the arc holes (32) on the same side. A screw (33) is threadedly connected to the sliding block (31), and a locking block (34) is rotatably connected to the end of the screw (33). A sliding rod (35) is fixed to the side wall of the sliding block (31), and the locking block (34) is slidably connected to the sliding rod (35).

3. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 1, characterized in that, The driving mechanism (7) includes an electromagnetic push rod (71) fixedly inserted into the end face of the mounting plate (5), and a movable plate (72) is fixed to the movable end of the electromagnetic push rod (71), and the circular sleeve (6) is fixed to the side wall of the movable plate (72).

4. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 3, characterized in that, The striking mechanism (8) includes annularly distributed arc-shaped striking blocks (81) inside the sleeve (6), and the inner arc surface of the arc-shaped striking blocks (81) is inclined. The outer side wall of the sleeve (6) is provided with multiple mounting grooves (82), and a T-shaped rod (83) is slidably connected to the bottom of the mounting groove (82). The rod end of the T-shaped rod (83) is fixedly connected to the side wall of the arc-shaped striking block (81). A spring (84) is fixed between the T-shaped rod (83) and the mounting groove (82). A hemispherical protrusion (85) is fixed at the end of the T-shaped rod (83) away from the arc-shaped striking block (81).

5. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 4, characterized in that, The gripper mechanism (9) includes multiple grooves (91) formed on the side wall of the sleeve (6). A rotating shaft (92) is rotatably connected to the lower side wall of the groove (91), and a gripper block (93) is fixed at the lower end of the rotating shaft (92). Multiple winding assemblies (94) are fixed to the side wall of the mounting base (2). Each winding assembly (94) is wound with a steel strand (95), and the end of the steel strand (95) away from the winding assembly (94) slides through the mounting plate (5), the moving plate (72) and the sleeve (6), and is rotatably connected to the top of the rotating shaft (92).

6. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 5, characterized in that, A torque sensor (11) is installed on the side wall of the winding assembly (94), and the torque sensor (11) is used to detect the rotational torque of the drive end of the winding assembly (94).

7. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 5, characterized in that, The drive unit (10) includes a drive sleeve (101) that rotates outside the circular sleeve (6). The inner wall of the drive sleeve (101) is fixed with a rotating protrusion (102) at the same height as the hemispherical protrusion (85). The shaft wall of the rotating shaft (92) is fixed with a lower gear (103), and the lower gear (103) meshes with the inner wall of the drive sleeve (101). The side wall of the circular sleeve (6) is provided with a through hole (104), and an upper gear (105) is provided inside the through hole (104). The upper gear (105) meshes with the drive sleeve (101). The moving plate (72) is equipped with a motor assembly (106) that drives the upper gear (105) to rotate.

8. The coal mining machine drum cold-fitting gear sleeve disassembly device according to claim 7, characterized in that, A position switch (12) is fixed to the bottom of the movable plate (72), and a positioning block (13) is fixed to the upper surface of the upper gear (105).

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