A quick pin pulling device for coal mining machine

Abstract

The present invention belongs to the technical field of coal mining machines, and in particular to a coal mining machine quick pin extraction device, comprising a mounting frame and a vertical electric push rod arranged on the side wall of the mounting frame, wherein the movable end of the vertical electric push rod is fixedly connected to a lifting plate. Before the screw rod is inserted into the pin shaft, the present invention can automatically adjust the placement position of the screw rod and the pin shaft so that the axis center lines of the screw rod and the pin shaft are aligned, thereby avoiding the problem that the axis center lines of the pin shaft and the screw rod are deviated, additional lateral force is generated during the pin extraction process, and the pin shaft or the pin extraction device is damaged. In addition, after the screw rod is worn for a long time and the thread becomes flat and rounded, this situation can be detected in time and reminded to the operator, so that the operator can replace the severely worn screw rod in time, thereby avoiding the problem that the screw rod is worn and the matching accuracy between the screw rod and the pin shaft thread groove is reduced, resulting in thread disengagement and damage to the pin shaft thread groove.

Description

Technical Field

[0001] The invention belongs to the technical field of coal shearers, and in particular relates to a quick pin pulling device for coal shearers. Background Art

[0002] Coal mining machine is one of the main equipment of comprehensive mining equipment. Coal mining machine has evolved from coal cutting machine. Coal mining machine is a large and complex system integrating mechanical, electrical and hydraulic functions. The working environment is harsh. During the mining process, due to the influence of geological structure during the recovery process of the comprehensive mining working face, some areas adopt the braking downward mining method for mining. However, this working method causes the guide shoes and walking wheels at the bottom of the coal mining machine to wear out quickly, which requires the use of a pin pulling device to remove the worn parts for repair or replacement. For example, a coal mining machine quick pin pulling device is proposed in patent announcement number CN216421582U.

[0003] When the existing pin pulling device is in use, it is necessary to spirally insert the screw rod into the thread groove of the pin shaft, and then the hydraulic equipment pulls the pin shaft out of the device through the screw rod. When using the hydraulic equipment to pull the screw rod, the screw rod and the pin shaft are not accurately aligned, so that the axial center lines of the pin shaft and the screw rod deviate, and additional lateral force is generated during the pin pulling process, which not only increases the difficulty of pin pulling, but also may damage the pin shaft or related structures of the pin pulling device. In addition, the screw rod on the surface of the pin pulling device continuously transmits thread with mating parts such as nuts during operation. Long-term friction will cause wear on the thread surface, and the thread may become less sharp and clear, and may become flat and rounded. This will reduce the matching accuracy between the screw rod and the pin shaft thread groove, and may even cause the thread to be disengaged, resulting in damage to the pin shaft thread groove.

[0004] Therefore, a coal mining machine quick pin pulling device is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a coal mining machine quick pin pulling device in view of the above problems.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solutions: a coal mining machine quick pin extraction device, comprising a mounting frame and a vertical electric push rod arranged on the side wall of the mounting frame, the movable end of the vertical electric push rod is fixedly connected to a lifting plate, the lower side wall of the vertical electric push rod is fixedly connected to a PLC controller, and the right side wall of the mounting frame is fixedly connected to an operation panel, and further comprising:

[0007] An adjusting assembly is provided on the upper side wall of the lifting plate, and the upper side wall of the lifting plate is connected to a pulling hydraulic cylinder through the adjusting assembly;

[0008] A mounting assembly, provided at the moving end of the drawing hydraulic cylinder, for fixing the screw rod;

[0009] The detection component is arranged at the moving end of the drawing hydraulic cylinder and is used for detecting the positions of the pin shaft and the screw rod.

[0010] Preferably, the adjusting assembly includes an adjusting plate and a first electric push rod, the adjusting plate is fixedly connected to the upper side wall of the lifting plate, the first electric push rod and the adjusting plate are fixedly connected, the upper side wall of the lifting plate is fixedly connected to the second electric push rod, the front side and the lower side of the pulling hydraulic cylinder are fixedly connected to the adjusting frame, the moving ends of the first electric push rod and the second electric push rod are both located in the adjusting frame and fixedly connected to two sliding pins, the side wall of the adjusting frame is provided with a sliding opening that matches the sliding pin, the upper side wall of the lifting plate is fixedly connected to an outer ring through a bracket, the inner wall of the outer ring is rotatably connected to an inner ring through a rotating shaft, and the inner wall of the inner ring is rotatably connected to the pulling hydraulic cylinder through a rotating shaft.

[0011] Preferably, the mounting assembly includes a mounting cylinder and a mounting cover, the mounting cylinder and the mounting cover are connected by a flange mechanism, the mounting cylinder is fixedly connected to the movable end of the pulling hydraulic cylinder, the side wall of the mounting cover is provided with a jack that matches the screw rod, the right end of the screw rod is located in the mounting cover and is fixedly connected to a circular plate, the inner wall of the mounting cylinder is fixedly connected to the twisting motor through a small electric push rod, the output end of the twisting motor is fixedly connected to a cylinder, the cylinder is rotatably arranged in the cylinder, the upper and lower inner walls of the cylinder are fixedly connected to support plates, the rod wall of the cylinder located in the cylinder is symmetrically fixedly connected to two fixed plates front and back, the support plate and the fixed plate are fixedly connected with the same spring, the rear side wall of the fixed plate located on the rear side is fixedly connected to a conductive block, and the conductive block is electrically connected to an external power supply, the inner wall of the cylinder is inlaid with a conductive plate, and the conductive plate is electrically connected to a PLC controller.

[0012] Preferably, the detection assembly includes a mounting sleeve fixedly mounted on the movable end of the drawing hydraulic cylinder, the outer wall of the mounting sleeve is rotatably connected to a rotating ring through a bearing, the side wall of the mounting sleeve is fixedly connected to a drive motor, the output end of the drive motor is transmission-connected to the rotating ring through a gear ring transmission assembly, bent plates are fixedly connected on both sides of the rotating ring, the side walls of the two bent plates are connected to detection electric push rods, the movable end of the detection electric push rod located on the lower side passes through the bent plate and is fixedly connected to a detection cylinder, the inner wall of the detection cylinder is fixedly connected to a top frame through a spring, the upper end of the top frame extends out of the detection cylinder and is fixedly connected to a ball bearing, the lower side wall of the top frame is fixedly connected to a trigger block, the trigger block is electrically connected to an external power supply, the inner wall of the detection cylinder is inlaid with a trigger plate, the right side wall of the bent plate located on the lower side is fixedly connected to a transfer block, the trigger plate and the transfer block are electrically connected, the fixed sleeve of the movable end of the drawing hydraulic cylinder is provided with a positioning ring, the left side wall of the positioning ring is fixedly connected to four arc-shaped transfer plates, and the arc-shaped transfer plates are electrically connected to a PLC controller.

[0013] Preferably, the movable end of the detection electric push rod located on the upper side is fixedly connected to a vertical cylinder, and the upper inner wall of the vertical cylinder is fixedly connected to a placement rack through a spring, the lower end of the placement rack extends out of the vertical cylinder and is fixedly connected to a contact plate, the right side wall of the placement rack is fixedly connected to a metal block, the metal block is electrically connected to an external power supply, the inner wall of the vertical cylinder is inlaid with a resistor plate, and the upper end of the resistor plate is electrically connected to a PLC controller.

[0014] Preferably, the side wall of the bent plate is fixedly connected to a fixing sleeve through a bracket, a threaded cylinder is rotatably connected to the fixing sleeve, a threaded rod is threadedly sleeved in the threaded cylinder, the right end of the threaded rod is fixedly connected to a fixing bracket, and the fixing bracket is a Z-shaped structure. The side wall of the bent plate is provided with a through opening that matches the fixing bracket, the upper end of the fixing bracket passes through the through opening and is hinged with a top block, the top block and the fixing bracket are fixedly connected with the same spring, and the outer wall of the pin shaft is fixedly connected with a top ring that matches the top block.

[0015] Preferably, a rough plate is fixedly connected to the left side wall of the threaded barrel, and the threaded rod and the threaded barrel have a self-locking function.

[0016] Preferably, a twisting plate is fixedly connected to the upper side wall of the cylinder, and a twisting block matching the twisting plate is fixedly connected to the side wall of the circular plate.

[0017] Compared with the existing technology, the advantages of a coal mining machine quick pin pulling device are:

[0018] 1. By setting up the adjustment component, the placement position of the screw rod and the pin can be automatically adjusted before the screw rod is inserted into the pin shaft, so that the axis center lines of the screw rod and the pin shaft are aligned, thereby avoiding the deviation of the axis center lines of the pin shaft and the screw rod, which will generate additional lateral force during the pin pulling process and damage the pin shaft or the pin pulling device.

[0019] 2. Through the provided installation assembly, the appropriate screw can be installed according to the different types of pins, and the screw can be automatically screwed into the thread groove of the pin. The operator does not need to manually screw the screw, thereby reducing the operator's work intensity and improving the convenience of using the pin pulling device.

[0020] 3. Through the vertical cylinder, placement rack, contact plate, metal block and resistance plate, when the screw rod is worn for a long time and the thread becomes flat and rounded, this situation can be detected in time and reminded to the operator. The operator can replace the severely worn screw rod in time, thereby avoiding the problem that the matching accuracy between the screw rod and the pin shaft thread groove is reduced after the screw rod is worn, resulting in thread disengagement and damage to the pin shaft thread groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a coal mining machine quick pin extraction device provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a detection component in a coal mining machine quick pin extraction device provided by the present invention;

[0023] Figure 3 This is a structural diagram of an installation component in a coal mining machine quick pin extraction device provided by the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of a cylinder in a coal mining machine quick pin extraction device provided by the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of a detection cylinder in a coal mining machine quick pin extraction device provided by the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of a vertical cylinder in a coal mining machine quick pin extraction device provided by the present invention;

[0027] Figure 7 This is a schematic diagram of the connection relationship between the outer ring and the inner ring in a coal mining machine quick pin extraction device provided by the present invention;

[0028] Figure 8 The present invention provides a schematic structural diagram of an adjustment component in a quick pin extraction device for a coal mining machine.

[0029] In the figure: 1 mounting frame, 2 vertical electric push rod, 3 lifting plate, 4 PLC controller, 5 operation panel, 6 drawing hydraulic cylinder, 7 screw rod, 8 pin shaft, 9 adjustment component, 91 adjustment plate, 92 first electric push rod, 10 second electric push rod, 11 adjustment frame, 12 sliding pin, 13 outer ring, 14 inner ring, 15 mounting component, 151 mounting cylinder, 152 mounting cover, 16 round plate, 17 twisting motor, 18 cylinder, 19 support plate, 20 fixing plate, 21 conductive block, 22 conductive plate, 23 detection component, 23 1 Mounting sleeve, 232 rotating ring, 24 driving motor, 25 bending plate, 26 detection electric push rod, 27 detection cylinder, 28 top frame, 29 ball, 30 trigger block, 31 trigger plate, 32 transfer block, 33 positioning ring, 34 arc transfer plate, 35 vertical cylinder, 36 placement frame, 37 contact plate, 38 metal block, 39 resistance plate, 40 fixing sleeve, 41 threaded cylinder, 42 threaded rod, 43 fixing frame, 44 top block, 45 top ring, 46 rough plate, 47 screw plate, 48 screw block, 49 cylinder, 50 small electric push rod. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figures 1-8 As shown, a coal mining machine quick pin extraction device includes a mounting frame 1 and a vertical electric push rod 2 provided on the side wall of the mounting frame 1, a lifting plate 3 is fixedly connected to the movable end of the vertical electric push rod 2, a PLC controller 4 is fixedly connected to the lower side wall of the vertical electric push rod 2, and an operation panel 5 is fixedly connected to the right side wall of the mounting frame 1, and further includes:

[0032] The adjusting assembly 9 is arranged on the upper side wall of the lifting plate 3. The upper side wall of the lifting plate 3 is connected to the pulling hydraulic cylinder 6 through the adjusting assembly 9. The adjusting assembly 9 includes an adjusting plate 91 and a first electric push rod 92. The adjusting plate 91 is fixedly connected to the upper side wall of the lifting plate 3. The first electric push rod 92 is fixedly connected to the adjusting plate 91. The upper side wall of the lifting plate 3 is fixedly connected to the second electric push rod 10. The front side and the lower side of the pulling hydraulic cylinder 6 are fixedly connected to the adjusting frame 11. The moving ends of the first electric push rod 92 and the second electric push rod 10 are both located on the adjusting frame 11. The inner wall of the lifting plate 3 is fixedly connected to the inner ring 14 and has two sliding pins 12. The side wall of the adjusting frame 11 is provided with a sliding opening that matches the sliding pin 12. The upper side wall of the lifting plate 3 is fixedly connected to the outer ring 13 through a bracket. The inner wall of the outer ring 13 is rotatably connected to the inner ring 14 through a rotating shaft. The inner wall of the inner ring 14 is rotatably connected to the pulling hydraulic cylinder 6 through a rotating shaft, which can align the axis of the screw rod 7 and the pin shaft 8, thereby avoiding the deviation of the axis of the pin shaft 8 and the screw rod 7, which will generate additional lateral force during the pin pulling process and damage the pin shaft 8 or the pin pulling device.

[0033] The mounting assembly 15 is arranged at the moving end of the drawing hydraulic cylinder 6 and is used to fix the screw rod 7. The mounting assembly 15 includes a mounting cylinder 151 and a mounting cover 152. The mounting cylinder 151 and the mounting cover 152 are connected by a flange mechanism. The mounting cylinder 151 is fixedly connected to the moving end of the drawing hydraulic cylinder 6. The side wall of the mounting cover 152 is provided with a socket that matches the screw rod 7. The right end of the screw rod 7 is located in the mounting cover 152 and is fixedly connected to a circular plate 16. The inner wall of the mounting cylinder 151 is fixedly connected to a twisting motor 17 through a small electric push rod 50. The output end of the twisting motor 17 is fixedly connected to a cylinder 18. The cylinder 18 is rotatably arranged in the cylinder 49. The inner walls of the upper and lower sides of the cylinder 49 are fixedly connected. They are all fixedly connected with a support plate 19, and the rod wall of the cylinder 18 inside the cylinder 49 is symmetrically fixedly connected with two fixing plates 20 in front and back. The same spring is fixedly connected between the support plate 19 and the fixing plate 20. The rear wall of the rear fixing plate 20 is fixedly connected with a conductive block 21, and the conductive block 21 is electrically connected to the external power supply. The inner wall of the cylinder 49 is inlaid with a conductive plate 22, and the conductive plate 22 is electrically connected to the PLC controller 4. The appropriate screw rod 7 can be installed according to different models of pin shafts 8, and the screw rod 7 can be automatically screwed into the thread groove of the pin shaft 8, without the operator manually twisting the screw rod 7, thereby reducing the operator's work intensity and improving the convenience of using the pin pulling device;

[0034] The detection component 23 is arranged at the moving end of the drawing hydraulic cylinder 6 and is used to detect the positions of the pin shaft 8 and the screw rod 7. The detection component 23 includes a mounting sleeve 231 fixedly mounted on the moving end of the drawing hydraulic cylinder 6. The outer wall of the mounting sleeve 231 is rotatably connected to a rotating ring 232 through a bearing. The side wall of the mounting sleeve 231 is fixedly connected to a drive motor 24. The output end of the drive motor 24 is connected to the rotating ring 232 through a gear ring transmission assembly. Both sides of the rotating ring 232 are fixedly connected to a bent plate 25. The side walls of the two bent plates 25 are connected to a detection electric push rod 26. The moving end of the detection electric push rod 26 located at the lower side passes through the bent plate 25 and is fixedly connected to a detection cylinder 27. The inner wall of the detection cylinder 27 is fixedly connected to the top frame 28 through a spring. The upper end of the top frame 28 extends out of the detection cylinder 27 and is fixedly connected to a ball 29. The lower side wall of the top frame 28 is fixedly connected to a trigger block 30. The trigger block 30 is electrically connected to an external power supply. The inner wall of the detection cylinder 27 is inlaid with a trigger plate 31. The right side wall of the lower bent plate 25 is fixedly connected to a transfer block 32. The trigger plate 31 and the transfer block 32 are electrically connected. The moving end fixed sleeve of the pulling hydraulic cylinder 6 is provided with a positioning ring 33. The left side wall of the positioning ring 33 is fixedly connected with four arc-shaped transfer plates 34. The arc-shaped transfer plates 34 are electrically connected to the PLC controller 4, which can detect whether the pin shaft 8 and the screw rod 7 are aligned.

[0035] The movable end of the upper detection electric push rod 26 is fixedly connected to the vertical cylinder 35, and the upper inner wall of the vertical cylinder 35 is fixedly connected to the placement rack 36 through a spring. The lower end of the placement rack 36 extends out of the vertical cylinder 35 and is fixedly connected to the contact plate 37. The right side wall of the placement rack 36 is fixedly connected to a metal block 38, and the metal block 38 is electrically connected to the external power supply. The inner wall of the vertical cylinder 35 is inlaid with a resistor plate 39, and the upper end of the resistor plate 39 is electrically connected to the PLC controller 4. After the screw rod 7 is worn for a long time and the thread becomes flat and rounded, this situation can be detected in time and the operator can be reminded. The operator can replace the severely worn screw rod 7 in time, thereby avoiding the problem that the screw rod 7 is worn and the matching accuracy between the thread groove of the pin shaft 8 is reduced, resulting in thread disengagement and damage to the thread groove of the pin shaft 8.

[0036] The side wall of the bent plate 25 is fixedly connected to a fixing sleeve 40 through a bracket, and a threaded cylinder 41 is rotatably connected to the fixing sleeve 40, and a threaded rod 42 is threadedly sleeved in the threaded cylinder 41. The right end of the threaded rod 42 is fixedly connected to a fixing frame 43, and the fixing frame 43 is a Z-shaped structure. The side wall of the bent plate 25 is provided with a through opening that matches the fixing frame 43. The upper end of the fixing frame 43 passes through the through opening and is hinged with a top block 44. The top block 44 and the fixing frame 43 are fixedly connected with the same spring, and the outer wall of the pin shaft 8 is fixedly connected with a top ring 45 that cooperates with the top block 44, thereby increasing the connection strength between the pin pulling device and the pin shaft 8.

[0037] A rough plate 46 is fixedly connected to the left side wall of the threaded barrel 41 . The threaded rod 42 and the threaded barrel 41 have a self-locking function, which improves the stability of the placement of the threaded rod 42 .

[0038] A screw plate 47 is fixedly connected to the upper side wall of the cylinder 49 , and a screw block 48 matching the screw plate 47 is fixedly connected to the side wall of the circular plate 16 , so that the cylinder 49 can drive the circular plate 16 to rotate.

[0039] The operating principle of the present invention is described as follows: the pin pulling device is placed on one side of the pin shaft 8 to be pulled. The operator then selects a suitable screw rod 7 based on the size of the threaded groove at the end of the pin shaft 8 and inserts the screw rod 7 into the mounting cover 152. The mounting cylinder 151 and the mounting cover 152 are then combined and fixed to the mounting cover 152 and the mounting cylinder 151 via a flange. The operator then adjusts the placement of the mounting frame 1 (the placement angles of the mounting frame 1, the pulling hydraulic cylinder 6, and the screw rod 7 can be preliminarily adjusted by adding wedge-shaped spacers). , so that the thread grooves on the surfaces of the screw rod 7 and the pin 8 are roughly aligned, and then the position of the mounting frame 1 is fixed by using components such as pins. At this time, the detection cylinder 27 is on one side of the pin 8. Then, the operator controls the detection electric push rod 26 connected to the detection cylinder 27 through the operation panel 5 according to the diameter of the pin 8, so that the detection electric push rod 26 drives the detection cylinder 27 and the ball 29 to move to the set position in the direction close to the pin 8. In the subsequent process of the ball 29 rotating in a circle, the diameter of the circle formed by the ball 29 is the same as the diameter of the pin 8;

[0040] Then the operator transmits an electrical signal to the PLC controller 4 through the operation panel 5. After receiving the electrical signal, the PLC controller 4 controls the driving motor 24 to work. The driving motor 24 controls the rotating ring 232 to rotate through the gear ring transmission assembly. The rotating ring 232 drives the curved plates 25 on both sides to rotate. For example, when the axis of the pin shaft 8 is horizontal and the axis pin of the screw rod 7 is tilted downward, after the curved plate 25 drives the ball 29 to rotate to the bottom of the pin shaft 8, the ball 29 will contact the lower rod wall of the pin shaft 8, and the ball 29 will drive the top frame 28 and the trigger block 30 to move downward together, so that the trigger block 30 contacts the trigger plate 31. The trigger block 30 is electrically connected to the external power supply, and the trigger plate 31 is electrically connected to the transmission block 32. Driven by the lower curved plate 25, the transmission block 32 will contact the lower arc-shaped transmission plate 3 4 contact, the arc-shaped transmission plate 34 is electrically connected to the positive circuit of the second electric push rod 10, so that the external power is transmitted to the positive circuit of the second electric push rod 10, so that the second electric push rod 10 drives the two sliding pins 12 below to move upward, and the sliding cooperation between the sliding pin 12 and the sliding openings on both sides of the adjustment frame 11 will drive the right end of the pulling hydraulic cylinder 6 to move upward, and the left cylinder body of the pulling hydraulic cylinder 6 will drive the inner ring 14 to rotate upward a certain angle in the outer ring 13, so that the moving end of the pulling hydraulic cylinder 6 drives the pin shaft 8, the bending plate 25 and the ball 29 to rotate a certain angle together, until the axis of the pin shaft 8 and the screw rod 7 coincide with each other, and the ball 29 will no longer press down the top frame 28 and the trigger block 30, so that the second electric push rod 10 stops working. Similarly, when the axis of the screw rod 7 and the pin shaft 8 deviates in any direction, calibration can be performed;

[0041] After the axis lines of the screw rod 7 and the pin shaft 8 are calibrated, the PLC controller 4 will control the small electric push rod 50 and the twisting motor 17 to work simultaneously, and the small electric push rod 50 will push the twisting motor 17, the cylinder 18 and the cylinder 49 to move to the left together, so that the cylinder 49 pushes the circular plate 16 and moves to the left together with the screw rod 7 (the side wall of the mounting cover 152 is connected with a guide sleeve, which can keep the screw rod 7 moving in a straight line to avoid the axis line of the screw rod 7 and the pin shaft 8 from deviating during the movement), and the twisting motor 17 will drive the cylinder 18 to rotate, and the cylinder 18 will drive the front and rear fixed plates 20 to rotate, and the spring between the fixed plate 20 and the support plate 19 will push the support plate 19 and the cylinder 49 to rotate, and the cylinder 49 will drive the twisting plate 47 to push the twisting block 4 8. The screw block 48 rotates through the circular plate 16 and the screw rod 7, so that the screw rod 7 is rotated and inserted into the thread groove of the pin shaft 8. When the screw rod 7 is screwed into the thread groove of the pin shaft 8 to a set depth, it will stop rotating due to interference, thereby interfering with the rotation of the cylinder 49. Tightening the bolt will drive the cylinder 18 to continue rotating. The cylinder 18 will drive the fixed plate 20 and the conductive block 21 to rotate and contact with the conductive plate 22. The conductive block 21 is electrically connected to the external power supply, and the conductive plate 22 is electrically connected to the PLC controller 4. When the conductive plate 22 and the conductive block 21 are in contact, an electrical signal will be transmitted to the PLC controller 4, and the PLC controller 4 will control the alarm device to work (the alarm device can be a buzzer) to remind the operator that the pin shaft 8 and the screw rod 7 have been rotated and connected.

[0042] After hearing the alarm, the operator first rotates the two rough plates 46. The rough plates 46 drive the threaded barrel 41 to rotate, and the two threaded rods 42 move through the threaded fit. The threaded rods 42 drive the top block 44 to move to the left through the fixing frame 43. When the top block 44 passes the top ring 45, it rotates a certain angle. When the top block 44 and the top ring 45 separate, the operator needs to rotate the rough plates 46 in the opposite direction to control the top block 44 to contact the left side wall of the top ring 45. Then, the operator controls the pulling hydraulic cylinder 6 through the operation panel 5 to drive the screw rod 7 and the top block 44 to move to the right together, thereby pulling out the pin 8.

[0043] After the pin shaft 8 is pulled out, the operator rotates and removes the pin shaft 8 and the screw rod 7, and then transmits a control signal to the PLC controller 4 through the operation panel 5 according to the diameter of the thread on the surface of the screw rod 7. The PLC controller 4 first controls the detection electric push rod 26 connected to the vertical cylinder 35 to work, so that the detection electric push rod 26 drives the vertical cylinder 35 and the contact plate 37 to move toward the set position close to the screw rod 7. After the contact plate 37 contacts the screw rod 7, it will stop moving, and the vertical cylinder 35 will continue to move under the action of the detection electric push rod 26, so that the contact plate 37 drives the placement rack 36 and the metal block 38 to slide relative to each other in the vertical cylinder 35, and the metal block 38 will contact a certain point of the resistor plate 39. When the detection electric push rod 26 stops working, the PLC controller 4 will control the metal block 38 and the external power supply to energize for one second, and the external current will pass through the metal block 38 and the power supply. The resistance plate 39 is transmitted to the PLC controller 4, and the PLC controller 4 analyzes the current signal. When the surface thread of the screw rod 7 is severely worn, the contact plate 37 needs to move a long distance toward the direction close to the screw rod 7 before it can contact the surface thread of the screw rod 7. When the vertical cylinder 35 stops moving, the metal block 38 will contact the position of the resistance plate 39 near the lower end. When the external voltage remains unchanged, the resistance value of the resistor on the contact circuit is large, so that the current signal transmitted to the PLC controller 4 is smaller than the standard value (the standard value is recorded inside the PLC controller 4). The PLC controller 4 will control the external sound and light alarm to work to remind the operator. The operator can replace the severely worn screw rod 7 in time, thereby avoiding the problem that the screw rod 7 is worn and the matching accuracy between the thread groove of the pin shaft 8 is reduced, resulting in thread disengagement and damage to the thread groove of the pin shaft 8.

[0044] 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 in the scope of protection of the present invention.

Claims

1. A coal mining machine quick pin extraction device, comprising a mounting frame (1) and a vertical electric push rod (2) arranged on a side wall of the mounting frame (1), wherein the movable end of the vertical electric push rod (2) is fixedly connected to a lifting plate (3), the lower side wall of the vertical electric push rod (2) is fixedly connected to a PLC controller (4), and the right side wall of the mounting frame (1) is fixedly connected to an operating panel (5), characterized in that: Also includes: An adjusting component (9) is arranged on the upper side wall of the lifting plate (3), and the upper side wall of the lifting plate (3) is connected to a pulling hydraulic cylinder (6) via the adjusting component (9); A mounting assembly (15) is provided at the movable end of the drawing hydraulic cylinder (6) and is used to fix the screw rod (7); A detection assembly (23) is provided at the moving end of the drawing hydraulic cylinder (6) and is used for detecting the positions of the pin shaft (8) and the screw rod (7). The detection assembly (23) includes a fixed sleeve (40) and a mounting sleeve (231) provided at the moving end of the drawing hydraulic cylinder (6). The outer wall of the mounting sleeve (231) is rotatably connected to a rotating ring (232) through a bearing. The side wall of the mounting sleeve (231) is fixedly connected to a driving motor (24). The output end of the driving motor (24) is connected to the rotating ring (232) through a gear ring transmission assembly. The rotating ring (232) is Both sides are fixedly connected with a bent plate (25), and the side walls of the two bent plates (25) are connected with a detection electric push rod (26). The movable end of the detection electric push rod (26) on the lower side passes through the bent plate (25) and is fixedly connected with a detection cylinder (27). The inner wall of the detection cylinder (27) is fixedly connected with a top frame (28) through a spring. The upper end of the top frame (28) extends out of the detection cylinder (27) and is fixedly connected with a ball (29). The lower side wall of the top frame (28) is fixedly connected with a trigger block (30). The trigger block (30) is electrically connected to an external power supply. The inner wall of the cylinder (27) is inlaid with a trigger plate (31), and the right side wall of the bent plate (25) located at the lower side is fixedly connected to a transfer block (32), and the trigger plate (31) and the transfer block (32) are electrically connected. The moving end fixed sleeve (40) of the pulling hydraulic cylinder (6) is provided with a positioning ring (33), and the left side wall of the positioning ring (33) is fixedly connected to four arc-shaped transfer plates (34), and the arc-shaped transfer plates (34) are electrically connected to the PLC controller (4). The side wall of the bent plate (25) is fixedly connected to a fixed sleeve (40) through a bracket, and the fixed sleeve (40) is rotated inside. A threaded cylinder (41) is movably connected, and a threaded rod (42) is sleeved on the inner thread of the threaded cylinder (41). The right end of the threaded rod (42) is fixedly connected to a fixing frame (43). The fixing frame (43) is a Z-shaped structure. The side wall of the bent plate (25) is provided with a through hole that matches the fixing frame (43). The upper end of the fixing frame (43) passes through the through hole and is hinged with a top block (44). The top block (44) and the fixing frame (43) are fixedly connected with the same spring. The outer wall of the pin shaft (8) is fixedly connected with a top ring (45) that matches the top block (44).

2. A coal mining machine quick pin removal device according to claim 1, characterized in that: The adjustment assembly (9) includes an adjustment plate (91) and a first electric push rod (92), the adjustment plate (91) is fixedly connected to the upper side wall of the lifting plate (3), the first electric push rod (92) and the adjustment plate (91) are fixedly connected, the upper side wall of the lifting plate (3) is fixedly connected to the second electric push rod (10), the front side and the lower side of the pulling hydraulic cylinder (6) are fixedly connected to the adjustment frame (11), the moving ends of the first electric push rod (92) and the second electric push rod (10) are both located in the adjustment frame (11) and fixedly connected to two sliding pins (12), the side wall of the adjustment frame (11) is provided with a sliding port that matches the sliding pins (12), the upper side wall of the lifting plate (3) is fixedly connected to the outer ring (13) through a bracket, the inner wall of the outer ring (13) is rotatably connected to the inner ring (14) through a rotating shaft, and the inner wall of the inner ring (14) is rotatably connected to the pulling hydraulic cylinder (6) through a rotating shaft.

3. A coal mining machine quick pin removal device according to claim 1, characterized in that: The mounting assembly (15) includes a mounting cylinder (151) and a mounting cover (152), wherein the mounting cylinder (151) and the mounting cover (152) are connected via a flange mechanism, wherein the mounting cylinder (151) is fixedly connected to the movable end of the drawing hydraulic cylinder (6), and the side wall of the mounting cover (152) is provided with a socket that matches the screw rod (7), and the right end of the screw rod (7) is located in the mounting cover (152) and is fixedly connected to a circular plate (16), and the inner wall of the mounting cylinder (151) is fixedly connected to a twisting motor (17) via a small electric push rod (50), and the output end of the twisting motor (17) is fixedly connected to a cylindrical (16) 8), the cylinder (18) is rotatably arranged in the cylinder (49), and the inner walls of the upper and lower sides of the cylinder (49) are fixedly connected with support plates (19), and the rod wall of the cylinder (18) located in the cylinder (49) is symmetrically fixedly connected with two fixed plates (20) in the front and rear directions, and the same spring is fixedly connected between the support plate (19) and the fixed plate (20), and the rear side wall of the fixed plate (20) located at the rear side is fixedly connected with a conductive block (21), and the conductive block (21) is electrically connected to an external power supply. The inner wall of the cylinder (49) is inlaid with a conductive plate (22), and the conductive plate (22) is electrically connected to the PLC controller (4).

4. A coal mining machine quick pin removal device according to claim 1, characterized in that: The movable end of the detection electric push rod (26) located on the upper side is fixedly connected to a vertical cylinder (35), and the upper inner wall of the vertical cylinder (35) is fixedly connected to a placement rack (36) through a spring, the lower end of the placement rack (36) extends out of the vertical cylinder (35) and is fixedly connected to a contact plate (37), the right side wall of the placement rack (36) is fixedly connected to a metal block (38), the metal block (38) is electrically connected to an external power supply, the inner wall of the vertical cylinder (35) is inlaid with a resistor plate (39), and the upper end of the resistor plate (39) is electrically connected to the PLC controller (4).

5. A coal mining machine quick pin removal device according to claim 1, characterized in that: A rough plate (46) is fixedly connected to the left side wall of the threaded barrel (41), and the threaded rod (42) and the threaded barrel (41) have a self-locking function.

6. A coal mining machine quick pin removal device according to claim 3, characterized in that: The upper side wall of the cylinder (49) is fixedly connected to a screwing plate (47), and the side wall of the circular plate (16) is fixedly connected to a screwing block (48) that matches the screwing plate (47).

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