Automatic cable dragging device for coal mining machine

Abstract

The utility model discloses an automatic cable dragging device for a coal mining machine, which is arranged on a cable trough of a scraper matched with the coal mining machine for use and comprises a cable dragging driving device used for driving a cable dragging, arranging the cable of the coal mining machine and preventing stacking and breaking, the cable penetrates through a cable dragging wheel, and the cable is arranged and straightened through the cable dragging wheel. Cable stacking is prevented; one end of the towing trolley is connected with the towing wheel, the other end of the towing trolley is connected with the connector through a pin shaft, the two ends of the connector are connected with the transmission chains respectively, and the transmission chains are closed at the connector to form a closed loop; the connector is used for limiting and synchronously moving along with the transmission chain; the elastic assembly and the towing wheel assembly are arranged on the same side of a cable trough of the scraper; the transmission chain is used for driving the connector, the cable towing trolley and the cable towing wheel assembly to move along with the movement of the cable; and the control unit is used for detecting whether the cable is elongated or not and giving an alarm.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining machines, in particular to an automatic cable dragging device for coal mining machines. Background Art

[0002] At present, the cable towing method of coal mining machines in coal mine comprehensive mining working faces is mostly to move the cable by dragging the cable clamp. During the operation, the cable may be bent and stacked in multiple layers due to its own weight or hanging. This makes it impossible for the cable clamp to move smoothly in the cable trough and requires manual assistance. Otherwise, the cable is easily broken, thus affecting the coal mining efficiency. However, manual dragging of cables is extremely dangerous and increases the labor intensity.

[0003] To solve this problem, some automatic cable-towing devices have appeared on the market. However, the existing automatic cable-towing devices are mostly unable to stop in time when the coal mining machine stops suddenly, which will still cause multiple layers of stacking and cannot completely avoid the risk of cable breakage. Utility Model Content

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the utility model provides an automatic cable dragging device for a coal mining machine, which can ensure matching with the moving speed of the coal mining machine and can run along with the speed of the coal mining machine. It can tighten and tidy up the cable of the coal mining machine following the operation of coal mining, and can avoid the situation where the cable splint is bent multiple times and stacked in multiple layers, effectively reducing the risk of cable breakage. It has a compact structure, is safe and reliable, and has strong practicality.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model provides an automatic cable dragging device for a coal mining machine, wherein the automatic dragging device is arranged on a cable trough of a scraper machine used in conjunction with the coal mining machine, and comprises:

[0007] A towline driving device, on which a driving wheel and a power device for driving the driving wheel to rotate are fixedly arranged;

[0008] A towing wheel assembly, wherein a towing wheel is provided on the towing wheel assembly, the cables pass through the towing wheel, and the cables are arranged and straightened by the towing wheel to prevent the cables from stacking;

[0009] A towing cable trolley, one end of which is connected to the towing cable wheel, and the other end of which is connected to a connector through a pin shaft, and both ends of the connector are respectively connected to a transmission chain, and the transmission chain is closed at the connector to form a closed loop;

[0010] A connector, which is fixedly arranged on the side of the towing cable trolley and is used for limiting the position and moving synchronously with the transmission chain;

[0011] An elastic device, wherein the elastic device is installed between the towing cable trolley and the towing cable wheel assembly; one end of the elastic device is fixed in the towing cable trolley, and the other end cooperates with the end of the towing cable wheel assembly, and the towing cable wheel assembly and the towing cable trolley can swing relative to each other; a tensioning wheel assembly, wherein the tensioning wheel assembly and the towing cable wheel assembly are arranged on the same side of the cable trough of the scraper, and the towing cable wheel assembly and the tensioning wheel assembly are both located at one end of the connector;

[0012] A spring cylinder, which provides tension to the chain and extends when the towing trolley is stuck to avoid breaking the chain and provide pre-tensioning force for the entire chain;

[0013] A tensioning assembly, one end of which is connected to the spring cylinder, and the other end of which is fixed to the cable trough;

[0014] A transmission chain, the transmission chain is wound around the driving sprocket, the tension wheel assembly and the connector on the driving device, and the transmission chain drives the connector, the towing cable trolley and the towing cable wheel assembly to move with the movement of the cable;

[0015] A control unit is used to detect the magnitude of the tension on the cable and to give an alarm according to the detection result.

[0016] Furthermore, the connector has a bilaterally symmetrical structure, and an open slot is provided at each end of the connector for clamping and fixing the transmission chain horizontally, and a vertical notch is provided in the middle of the open slot for clamping the transmission chain vertically, so that the transmission chain can be fixed on the connector in any horizontal or vertical state.

[0017] Furthermore, a cylindrical pin is fixedly provided on the upper portion of the open slot for assisting in clamping the transmission chain.

[0018] Furthermore, a wedge-shaped surface is provided at the front end of the towing cable trolley for removing coal lumps and large impurities that hinder the movement of the towing cable trolley.

[0019] Furthermore, the contact surface between the clamping block and the elastic device is a spherical surface.

[0020] Furthermore, the elastic device is any one of a spring, a spring sheet or a spring tube.

[0021] Furthermore, a ball assembly is provided at the bottom of the towing cable trolley.

[0022] Furthermore, in addition to the module with control function, the control unit also includes a sensor and an alarm. The sensor and the alarm are electrically connected to the control unit of the coal mining machine. The sensor is used to detect the magnitude of the tension on the cable, and the alarm is used to alarm according to the magnitude of the tension on the cable detected by the sensor.

[0023] Furthermore, the diameter of the cylindrical pin is less than or equal to the width of the chain meshing gap in the transmission chain.

[0024] Furthermore, a detachably connected pressing block is provided on the top of the connector, which is used to prevent the transmission chain from swinging and falling off the connector after the transmission chain is arranged on the connector.

[0025] The main advantages of the technical solution of this utility model are as follows:

[0026] In view of the frequent occurrence of multiple stacking, blocking and even breakage of cables of coal mining machines in underground coal mines, the utility model provides an automatic cable dragging device for coal mining machines. The cable is passed through a towing cable wheel and straightened by the towing cable wheel, so that the cable of the coal mining machine can be sorted and effectively prevented from stacking. The structure of the tensioning component and the control unit can effectively prevent the cable from being pulled apart. The utility model has the advantages of compact structure, simplicity and easy implementation, small space required, novel structure, convenient processing and manufacturing, good economy, simple structure and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of a coal mining machine cable automatic dragging device from one perspective of an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall structure of the automatic cable dragging device for a coal mining machine from another perspective of an embodiment of the utility model;

[0030] Figure 3 For the general Figure 1 The overall structural diagram with the cable trough removed is shown in FIG;

[0031] Figure 4 For the general Figure 2 The overall structural diagram with the cable trough removed is shown in FIG;

[0032] Figure 5 for Figure 3A magnified schematic diagram of part A;

[0033] Figure 6 for Figure 3 A magnified schematic diagram of part B;

[0034] Figure 7 for Figure 3 A magnified schematic diagram of part C;

[0035] Figure 8 for Figure 4 The enlarged schematic diagram of the D part;

[0036] Fig. 9 for Figure 4 The enlarged schematic diagram of part E in the middle;

[0037] Fig.10 for Figure 4 The enlarged schematic diagram of the middle F part;

[0038] Fig.11 It is a structural schematic diagram of a perspective view of a transmission chain provided on a towing cable trolley and a towing cable wheel assembly in an automatic cable towing device for a coal mining machine according to an embodiment of the utility model;

[0039] Fig.12 It is a structural schematic diagram from another perspective of a transmission chain provided on a towing cable trolley and a towing cable wheel assembly in an automatic cable towing device for a coal mining machine according to an embodiment of the utility model;

[0040] Fig.13 It is a structural schematic diagram of a cable towing trolley in an automatic cable towing device for a coal mining machine according to an embodiment of the utility model from a first perspective;

[0041] Fig.14 It is a structural schematic diagram of a cable towing trolley in an automatic cable towing device for a coal mining machine according to an embodiment of the utility model from a second perspective;

[0042] Fig.15 It is a structural schematic diagram of the cable towing trolley in the automatic cable towing device for a coal mining machine according to one embodiment of the utility model from a third perspective;

[0043] Fig.16 for Fig.13 A magnified schematic diagram of part G in the middle;

[0044] Fig.17 It is a structural schematic diagram of a connector from one perspective in an automatic cable pulling device for a coal mining machine according to an embodiment of the utility model;

[0045] Fig.18 It is a structural schematic diagram of the connector and the transmission chain matching in the automatic cable pulling device for a coal mining machine according to one embodiment of the utility model from one perspective;

[0046] Fig.19 for Fig.17 A magnified schematic diagram of the middle A direction;

[0047] Fig. 20 for Fig.17 A partial cross-sectional structural schematic diagram of the connector shown in ;

[0048] Description of reference numerals:

[0049] 1. Towing cable drive device; 2. Towing cable trolley; 201. Elastic device; 202. Ball assembly; 203. Wedge surface; 3. Connector; 301. Cylindrical pin; 302. Open slot; 303. Vertical notch; 4. Towing cable wheel assembly; 401. Block; 5. Tensioning wheel assembly; 6. Spring cylinder; 7. Tensioning assembly; 8. Transmission chain; 9. Cable trough; 10. Pressure block. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] The technical solution provided by the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings.

[0052] As attached Figure 1-Figure 20 As shown, the embodiment of the utility model provides an automatic cable dragging device for a coal mining machine, which is arranged on a cable trough 9 of a scraper machine used in conjunction with the coal mining machine, and includes:

[0053] A towing cable driving device 1, a towing cable wheel assembly 4, a towing cable trolley 2, an elastic device 201, a connector 3, a spring cylinder 6, a tension wheel assembly 5, a tensioning assembly 7, a transmission chain 8, and a control unit, wherein:

[0054] A driving wheel and a power device for driving the driving wheel to rotate are fixedly arranged on the towing cable driving device 1; a towing cable wheel is arranged on the towing cable wheel assembly 4, the cable passes through the towing cable wheel, and the cable is arranged and straightened by the towing cable wheel to prevent the cable from stacking; one end of the towing cable trolley 2 is connected to the towing cable wheel, and the other end is connected to the connector 3 through a pin shaft, and the two ends of the connector 3 are respectively connected to the transmission chain 8, and the transmission chain 8 is closed at the connector 3 to form a closed loop; the connector 3 is fixedly arranged on the side of the towing cable trolley 2, and is used for limiting and moving synchronously with the transmission chain 8; the elastic device 201 is installed between the towing cable trolley 2 and the towing cable wheel assembly 4; one end of the elastic device 201 is fixed in the towing cable trolley 2, and the other end cooperates with the end of the towing cable wheel assembly 4, and the towing cable wheel assembly 4 and the towing cable trolley 2 can move mutually Swing within a certain angle; the tension wheel assembly 5, the tension wheel assembly 5 and the towing cable wheel assembly 4 are arranged on the same side of the cable trough 9 of the scraper, and the towing cable wheel assembly 4 and the tension wheel assembly 5 are both located at one end of the connector; the spring cylinder 6, the spring cylinder 6 provides tension to the chain, and extends when the towing cable trolley 2 is stuck (stuck and immobile), so as to avoid breaking the chain, and can provide pre-tensioning force for the entire chain; one end of the tensioning assembly 7 is connected to the spring cylinder 6, and the other end is fixed on the cable trough 9; the transmission chain 8 is wound around the driving sprocket, the tension wheel assembly 5 and the connector on the driving device to form a closed loop, and the transmission chain 8 drives the connector 3 and the towing cable trolley 2 and the towing cable assembly to move with the movement of the cable; the control unit, the control unit is used to detect the magnitude of the tension on the cable and to give an alarm according to the detected result.

[0055] In some optional implementations of this embodiment, the power device used to drive the drive wheel and drive the drive wheel to rotate is a motor or the like.

[0056] Therefore, the cable towing device of the utility model of the automatic cable towing device for coal mining machine itself plays the role of arranging the cables of the coal mining machine. The above-mentioned jamming situation can be buffered by the elastic device, and the anti-folding can be achieved by the cable towing device itself.

[0057] Specifically, Figure 17-Figure 20 The connector 3 is a bilaterally symmetrical structure, and an open slot 302 for clamping and fixing the horizontally placed transmission chain 8 is provided at each end of the connector 3, and a vertical notch 303 for clamping the vertically placed transmission chain 8 is provided in the middle position of the open slot 302, so that the transmission chain 8 can be fixed on the connector in any horizontal or vertical state.

[0058] Such an arrangement can more firmly fix the transmission chain 8 in both the horizontal and vertical directions, and can prevent sliding and shifting during the movement of the cable, thereby preventing damage to the cable. This can better protect the cable and make the cable move more smoothly.

[0059] Specifically, a cylindrical pin 301 is fixedly disposed on the upper portion of the open slot 302 for assisting in engaging the transmission chain 8 .

[0060] It should be noted that the diameter of the cylindrical pin 301 is less than or equal to the width of the chain meshing gap in the transmission chain 8. This arrangement enables the cylindrical pin 301 to be snapped into the transmission gap of the transmission chain 8, thereby ensuring the horizontal fixation of the transmission chain 8 on the connector 3.

[0061] In some optional implementations of the present embodiment, when the cylindrical pin 301 is arranged on the open slot 302, the outer cylindrical surface of the cylindrical pin 301 is matched with the gap between the meshing of the transmission chain 8. Such a setting, on the one hand, can ensure that there is no shaking between the two during the matching process, and has a certain stability. On the other hand, in the meshing gap of the transmission chain 8, the size of the cylindrical pin 301 is the largest and has greater strength. At the same time, in order to ensure a better limiting and fixing effect, the cylindrical pin 301 and the transmission chain 8 are consistent with the curved surface between the meshing gaps, so that in the process of positioning and fixing the transmission chain 8 by the cylindrical pin 301, there is greater force, more stability, and further avoids shaking and slipping during the transmission process.

[0062] In some optional implementations of this embodiment, the cylindrical pin 301 may also be a bolt, a positioning pin, or a positioning block or other structures to play the role of positioning and limiting.

[0063] In some optional implementations of the present embodiment, a detachably connected pressing block 10 is provided on the top of the connector 3 to prevent the transmission chain 8 from swinging and falling off the connector 3 after the transmission chain 8 is set on the connector 3.

[0064] Optionally, the pressing block 10 is a rectangular block. Preferably, the pressing block 10 is a rectangular plate with a thickness of no more than 3 cm and a maximum thickness of no more than 5 cm, and is made of wear-resistant material. Most preferably, the width of the pressing block 10 is consistent with or slightly smaller than the width of the top of the connector 3, and can be connected by a threaded connection or a quick-change method such as a clamp, a slot or a block. According to actual needs, during use, after the transmission chain 8 is fixed on the connector 3, a coarse-threaded screw is used to connect the wear-resistant hard plastic pressing plate to the top of the connector 3 to achieve quick connection and fixation.

[0065] Such an arrangement can prevent the transmission chain 8 from swinging and falling off the connector 3, and can further ensure the safe operation of the cable.

[0066] Therefore, through the structure of the connector, the effects of guiding, fixing, positioning and preventing falling off and sliding can be achieved at the same time, thereby effectively ensuring the safe movement of the cable and avoiding the cable from breaking and stacking.

[0067] Specifically, Figure 11-Figure 15 As shown, a wedge-shaped surface 203 is provided at the front end of the towing cable trolley 2 for removing coal lumps and large impurities that hinder the movement of the towing cable trolley 2.

[0068] In this way, the front end of the towing cable trolley 2 is designed as a wedge-shaped surface 203 that is conducive to cleaning floating coal. When a coal block falls into the cable trough 9, the towing cable trolley 2 takes advantage of the wedge-shaped structure and squeezes the coal block to the side when moving forward, and then falls to the ground along the reserved coal outlet, clearing obstacles for moving forward.

[0069] In some optional implementations of this embodiment, the wedge surface 203 may also be configured as an unequal-sided wedge structure or an inclined surface, a curved surface, or the like.

[0070] Specifically, the contact surface between the clamping block 401 and the elastic device 201 is a spherical surface.

[0071] Such an arrangement can ensure that the towing cable trolley 2 is still in full contact with the elastic device 201 during the swinging process, and ensure that the elastic device 201 is evenly stressed.

[0072] Specifically, the elastic device 201 is any one of a spring, a spring sheet or a spring tube, and is used to provide elastic force to provide a buffering effect for the towing cable trolley and the chain jam.

[0073] It should also be noted that: in combination with the installation method and position of the above-mentioned elastic device, in combination with the above-mentioned device, as an overall structure, since there is a certain gap between the connecting part of the towing cable wheel assembly and the towing cable trolley, when the cable drags the towing cable wheel, the towing cable wheel assembly will swing at a certain angle relative to the towing cable trolley, and the whole will remain flexible to prevent rigid collision.

[0074] Specifically, Fig.13 and 16 As shown, a ball assembly 202 is provided at the bottom of the towing cable trolley 2.

[0075] In some optional implementations of this embodiment, the ball assemblies 202 are arranged in a certain pattern at the bottom of the towing cable trolley 2 to reduce resistance, ensure smooth movement of the towing cable trolley 2, and avoid jamming.

[0076] It should also be noted that the ball assembly 202 arranged at the bottom of the trolley to reduce the friction of the towing cable trolley 2 and change the sliding mode into a rolling mode includes but is not limited to balls, and can also be set to structures such as needle rollers, pulleys or wheels.

[0077] Specifically, in addition to an integrated module with control functions, the control unit also includes sensors and alarms. Both the sensors and alarms are electrically connected to the control unit of the coal mining machine. The sensors are used to detect whether the cable is subjected to excessive force, and the alarms are used to sound an alarm based on the results detected by the sensors.

[0078] In some optional implementations of this embodiment, the sensor is a pressure sensor, the alarm is an audible and visual alarm, and the audible and visual alarm and the pressure sensor are both electrically connected to the control end of the coal mining machine controller.

[0079] It should be noted that when detecting the pressure on the elastic element on the towing cable trolley, when the jamming causes the tension of the transmission chain 8 to increase, there may be a risk of chain breakage. At this time, the elastic element plays a buffering role, and when the pressure exceeds a certain value, the alarm device is triggered to sound an alarm.

[0080] Specifically, during detection, the displacement sensor transmits the detected signal data to the coal mining machine controller, and the coal mining machine control signal sends an alarm command to the sound and light alarm to alert the staff to check the cable and towing cable device in time to effectively avoid the possibility of breaking.

[0081] In summary, in combination with the elastic device 201, when the coal mining machine cable is stretched due to jamming, the elastic device 201 is shortened to protect the cable. At the same time, the alarm sounds to remind the staff to check the cable condition in time to effectively avoid the possibility of breaking. The cable is bent once at the towing wheel assembly 4, and it is guaranteed to be bent at most once, which can effectively avoid multiple stacking. The towing wheel assembly 4 swings at an appropriate angle according to the tightness of the cable to protect the cable.

[0082] Specifically, the operating method and principle of the automatic cable dragging device for coal mining machines of the utility model to ensure the safe operation of the cable are as follows:

[0083] In the utility model, a driving device such as a motor is arranged on the towing cable driving device 1 to drive a driving sprocket arranged on the output shaft of the motor, so that the rotation of the motor is output to the driving sprocket after being decelerated, and at the same time, through the tensioning wheel on the tensioning wheel assembly 5 and the structure of the connector, the rotation of the motor can drive all the devices on the towing chain to rotate synchronously, and at the same time, the cable is passed through the towing cable wheel and straightened by the towing cable wheel to prevent stacking. Therefore, it can move with the cable through the rotation of the motor and the control system, and the cable can be realized under the action of the spring cylinder 6 and the tensioning assembly 7. The tightness can be adjusted, so that during the cable tensioning process, the cable can be prevented from being broken by shortening the elastic device 201, and the cable can be prevented from being folded by the detection of the control unit, so that the problem of cable damage can be solved from two directions of avoiding breakage and avoiding breaking. Therefore, it can ensure matching with the moving speed of the coal mining machine and can run at half the speed of the coal mining machine. The coal mining machine cable can be tightened and arranged following the operation of coal mining, and the cable clamps can be prevented from being bent multiple times and stacked in multiple layers, thereby effectively reducing the risk of cable breaking. The structure is compact, safe and reliable, and practical.

[0084] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A coal mining machine cable automatic dragging device, characterized in that: The automatic dragging device is arranged on the cable trough of the scraper machine used in conjunction with the coal mining machine, and comprises: A towline driving device, which is used to drive the towline, tidy up the cables of the coal mining machine, and prevent the cables from stacking and breaking; A towing wheel assembly, wherein a towing wheel is provided on the towing wheel assembly, the cables pass through the towing wheel assembly, and the cables are arranged and straightened by the towing wheel to prevent the cables from stacking; A towing cable trolley, one end of which is connected to the towing cable wheel, and the other end of which is connected to a connector through a pin shaft, and both ends of the connector are respectively connected to a transmission chain, and the transmission chain is closed at the connector to form a closed loop; A connector, which is fixedly arranged on the side of the towing cable trolley and is used for limiting the position and moving synchronously with the transmission chain; An elastic device, wherein the elastic device is installed between the towing cable trolley and the towing cable wheel assembly; one end of the elastic device is fixed in the towing cable trolley, and the other end cooperates with the end of the towing cable wheel assembly, and the towing cable wheel assembly and the towing cable trolley can swing relative to each other; a tensioning wheel assembly, wherein the tensioning wheel assembly and the towing cable wheel assembly are arranged on the same side of the cable trough of the scraper, and the towing cable wheel assembly and the tensioning wheel assembly are both located at one end of the connector; A spring cylinder, which provides tension to the chain and extends when the towing trolley is stuck to avoid breaking the chain and provide pre-tensioning force for the entire chain; A tensioning assembly, one end of which is connected to the spring cylinder, and the other end of which is fixed to the cable trough; A transmission chain, the transmission chain is wound around the driving sprocket, the tension wheel assembly and the connector on the driving device, and the transmission chain drives the connector, the towing cable trolley and the towing cable wheel assembly to move with the movement of the cable; A control unit is used to detect the magnitude of the tension on the cable and to give an alarm according to the detection result.

2. The automatic cable pulling device for coal mining machine according to claim 1 is characterized in that: The connector has a bilaterally symmetrical structure, with an open slot at each end of the connector for clamping and fixing the transmission chain in a horizontal position, and a vertical notch in the middle of the open slot for clamping the transmission chain in a vertical position, so that the transmission chain can be fixed on the connector in any horizontal or vertical state.

3. The automatic cable pulling device for coal mining machine according to claim 2 is characterized in that: A cylindrical pin is fixedly arranged on the upper part of the open slot for assisting in clamping the transmission chain.

4. The automatic cable pulling device for coal mining machine according to claim 1, characterized in that: A wedge-shaped surface is provided at the front end of the towing cable trolley for removing coal lumps and large impurities that hinder the movement of the towing cable trolley.

5. The automatic cable pulling device for coal mining machine according to claim 1, characterized in that: The elastic device is any one of a spring, a spring sheet or a spring tube.

6. The automatic cable pulling device for coal mining machine according to claim 1, characterized in that: A ball assembly is arranged at the bottom of the towing cable trolley.

7. The automatic cable pulling device for coal mining machine according to claim 1, characterized in that: The control unit includes a sensor and an alarm, both of which are electrically connected to the control unit of the coal mining machine. The sensor is used to detect the magnitude of the tension on the cable, and the alarm is used to sound an alarm based on the magnitude of the tension on the cable detected by the sensor.

8. The automatic cable pulling device for coal mining machine according to claim 3, characterized in that: The diameter of the cylindrical pin is less than or equal to the width of the chain meshing gap in the transmission chain.

9. The automatic cable pulling device for coal mining machine according to claim 1, characterized in that: A detachably connected pressing block is provided on the top of the connector, which is used to prevent the transmission chain from swinging and falling off the connector after the transmission chain is arranged on the connector.

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