A coal cutter trailing cable device

Abstract

The present application relates to coal mining device technical field, specifically to a kind of coal winning machine towed cable device, including cable clamp, still including limiting portion, limiting portion includes driving element and top pressure plate, the driving element includes shell and gyro wheel, shell's open end is fixedly connected cable clamp, vertical rotation is equipped with shaft in shell, gyro wheel is fixedly connected with interval in the shaft, each gyro wheel end away from cable clamp mobile penetrates the closed end of shell, each gyro wheel bottom surface recess has annular groove, the bottom surface annular array of gyro wheel inboard annular groove has arc groove, each gyro wheel downside is correspondingly equipped with driving rod, driving rod top rotation is connected with vertical rod;The top pressure plate is slidably sleeved in shell outside by sliding hole, top pressure plate is elastically connected cable clamp, each driving rod both ends are extended shell fixedly connected sliding hole side face.The present application solves the problem that cable clamp on the outside of cable is easily accumulated in cable groove due to gravity on the inclined coal mining face.

Description

Technical Field

[0001] This invention relates to the field of coal mining equipment technology, and more specifically to a coal mining machine cable dragging device. Background Technology

[0002] The coal mining machine is one of the core pieces of equipment in a fully mechanized coal mining face, responsible for cutting and unloading coal. Due to the large power of its drive motor to meet the high-intensity cutting requirements, and the narrow, complex environment of coal mine roadways, coupled with the compact structure of the coal mining machine itself, it is difficult to integrate large-capacity power supply devices (such as batteries or generators). Therefore, in actual production, external power supply is generally provided by dragging cables. During power supply, one end of the cable is connected to a substation in the roadway, and the other end is laid with the coal mining machine. The cable is arranged in a cable trough on one side of the scraper conveyor and can move within it. To protect the conductor and enhance the cable's tensile and abrasion resistance during bending, the cable is fitted with multiple cable clamps connected in series.

[0003] When the coal mining machine operates on an inclined working face, the cable trough is also arranged along the inclined surface. At this time, the cables inside the cable trough and the cable clamps outside are both subjected to gravity: the component of gravity along the inclined surface increases significantly with the increase of the working face inclination angle, while the normal pressure perpendicular to the cable trough decreases accordingly. Due to the large cross-sectional area and mass of the cables themselves, the downward force generated is also large; at the same time, the sliding friction coefficient between the cable clamps and the cable trough is limited, making it difficult to provide sufficient resistance. In addition, multiple cable clamps are connected end to end to form a long chain, and a slight slippage in any section may cause the entire chain to slide down. During the slide, the clamps accumulated at the bottom will further disrupt the static balance. Once the cables slide down and accumulate, some cables are easily squeezed out of the cable trough opening and intrude into the coal mining area. Therefore, in steep working faces, cables and cable clamps are very prone to sliding down, accumulating, or even detaching in the inclined cable trough due to their own weight, thus affecting operational safety. The publication CN214314355U, titled "A Magnetic Anti-slip Cable Clamp for Coal Mining Machines Applied to Inclined Coal Seam Fully Mechanized Mining Faces," also clearly points out the existence of this problem. Summary of the Invention

[0004] To address the problem that cable clamps on the outside of cables tend to slide and accumulate in the cable trough due to their own weight on inclined coal mining faces, this invention provides a cable dragging device for coal mining machines, which can limit the downward sliding of cable clamps in the cable trough.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A cable-dragging device for a coal mining machine includes a cable clamp and limiting parts symmetrically arranged on two vertical outer sides of the cable clamp. The limiting parts include a driving component and a top pressure plate. The driving component includes a housing and rollers. The open end of the housing is fixedly connected to the corresponding vertical outer side of the cable clamp. A rotating shaft is vertically rotatable inside the housing. Rollers are fixedly sleeved on the rotating shaft at intervals. The end of each roller away from the cable clamp moves through the closed end of the housing. Each roller has an annular groove recessed on its bottom surface. The bottom surface of the roller inside the annular groove has an arc-shaped groove arranged in an annular array. The outer end of each arc-shaped groove is connected to the annular groove. A driving rod is correspondingly provided on the lower side of each roller. The driving rod is located inside the housing between the rotating shaft and the cable clamp. The two ends of the driving rod slide into the sliding grooves opened on the side plate of the housing. A vertical rod is rotatably connected to the top of the driving rod. The vertical rod is located in the annular groove or any arc-shaped groove so that the driving rod is close to or away from the cable clamp. The top pressure plate is slidably sleeved on the outside of the housing through a sliding hole. The top pressure plate is elastically connected to the cable clamp. The two ends of each driving rod extend out of the housing and are fixedly connected to the side of the sliding hole.

[0007] Furthermore, the annular groove is coaxial with the roller, and the annular groove is located on the bottom surface of the corresponding roller near the edge; the housing is provided with a through hole through which the end of the roller away from the cable clamp can move.

[0008] Furthermore, each roller extending from the housing has an arc-shaped plate on its underside. The straight surface of the arc-shaped plate is fixedly connected to the housing. The circle containing the arc surface of the arc-shaped plate is coaxial with the annular groove on the corresponding roller. The diameter of the circle containing the arc surface of the arc-shaped plate is greater than the outer diameter of the annular groove but smaller than the diameter of the roller. The bottom surface of the roller extending from the housing slides in contact with the top surface of the corresponding arc-shaped plate.

[0009] Furthermore, the arcuate curvature of the plurality of arcuate grooves on each roller is oriented in the same direction as the rolling direction of the roller when the cable clamp moves forward.

[0010] Furthermore, the groove is a U-shaped groove with its opening facing the cable clamp, and the upper and lower sides of the end of the drive rod slide in contact with the upper and lower sides of the groove.

[0011] Furthermore, the width of the annular groove is equal to the width of the arc groove, the depth of the annular groove is equal to the depth of the arc groove, and the diameter of the upright corresponds to the width of the annular groove.

[0012] Furthermore, the top pressure plate is connected to the outer side of the cable clamp via an elastic ring on the side edge facing the cable clamp. Multiple through holes are provided on the top pressure plate on both sides of the sliding hole. The end of the through hole away from the cable clamp is blocked by a sealing plate. Each through hole is provided with a spring that is connected to the sealing plate at one end and to the cable clamp at the other end. Blind holes symmetrically arranged along the sliding hole are opened on the side of the top pressure plate facing the cable clamp. A limiting rod corresponding to the blind hole is fixed on the cable clamp. Each blind hole is slidably sleeved outside the corresponding limiting rod.

[0013] Furthermore, when the upright on each of the drive rods is located in the annular groove on the corresponding roller, the elastic ring is in a natural state, the multiple springs on the top pressure plate are in a fully compressed state, and the end of each roller away from the cable clamp extends out of the sliding hole on the top pressure plate on the same side.

[0014] Furthermore, when the upright on the drive rod is located inside any arc-shaped groove, the multiple springs on the top pressure plate are in a semi-compressed state, and the drive rod drives the top pressure plate away from the cable clamp to the limit state. The drive rod approaches the rotating shaft, and one end of the roller extending out of the housing is located in the sliding hole.

[0015] Furthermore, the side of the top pressure plate away from the cable clamp has a roughened surface formed by sandblasting.

[0016] The beneficial effects of the present invention through the above technical solution are as follows:

[0017] 1. When the coal mining machine drags the cable and cable clamp forward, the roller is driven to roll. The side of the arc groove on the roller will push the upright back into the annular groove, keeping the drive rod close to the cable clamp and the top pressure plate away from the side wall of the cable groove, thereby avoiding additional frictional resistance and ensuring that the cable clamp and its internal cable move forward smoothly.

[0018] 2. When the coal mining machine stops and the cable clamp moves backward under its own weight, the rollers roll in the opposite direction, and the side of the arc-shaped groove pushes the upright towards the inner end of the arc-shaped groove. The drive rod drives the top pressure plate to move outward away from the cable clamp. At the same time, the compressed spring releases its elastic force, which together drives the rough surface on the outer side of the top pressure plate to press against the side wall of the cable groove, achieving reliable braking and preventing the cable clamp from slipping out of control. This greatly improves the safety and controllability of cable dragging operations in the coal mining face.

[0019] 3. The through hole on the shell makes sliding contact with the roller, and the bow-shaped plate covers the annular groove and arc groove on the bottom surface of the roller, effectively preventing coal slag from entering the shell and the annular groove and arc groove, thus preventing the upright from getting stuck. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the right side housing and the roller of the present invention. Figure 1 (Main view);

[0022] Figure 3 This is a schematic diagram of the connection between the right side housing and the roller of the present invention. Figure 2 (Side view);

[0023] Figure 4 This is a top cross-sectional view of the right roller of the present invention;

[0024] Figure 5This is a schematic diagram of the structure connecting the multiple rollers and the rotating shaft on the right side of the present invention;

[0025] Figure 6 This is a schematic diagram of the connection between the top pressure plate and the drive rod of the present invention;

[0026] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0027] Figure 8 This is a cross-sectional front view of the connection between the right limiting part and the cable clamp of the present invention;

[0028] Figure 9 yes Figure 8 Sectional view at point BB;

[0029] Figure 10 This is a top cross-sectional view of the blind hole in the top pressure plate and the limiting rod on the cable clamp of the present invention.

[0030] The attached diagram is labeled as follows: 1. Cable clamp, 2. Top pressure plate, 3. Housing, 4. Roller, 5. Shaft, 6. Annular groove, 7. Arc groove, 8. Drive rod, 9. Slide groove, 10. Upright rod, 11. Sliding hole, 12. Through hole, 13. Bow plate, 14. Elastic ring, 15. Through hole, 16. Sealing plate, 17. Spring, 18. Blind hole, 19. Limiting rod, 20. Bearing 1, 21. Bearing 2, 22. Connecting lug. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0032] like Figures 1-10As shown, a cable-dragging device for a coal mining machine includes a cable clamp 1 and limiting parts symmetrically arranged on two vertical outer sides of the cable clamp 1. Each limiting part includes a driving component and a top pressure plate 2. The driving component includes a housing 3 and rollers 4. The housing 3 is a hollow cuboid with an opening on one side. The open end of the housing 3 is fixedly connected to the corresponding vertical outer side of the cable clamp 1. A rotating shaft 5 is vertically rotatable inside the housing 3. Both ends of the rotating shaft 5 are rotatably connected to the upper and lower side plates of the housing 3 via bearings 20. Rollers 4 are fixedly mounted on the rotating shaft 5 from top to bottom at intervals. Each roller 4 is a circular plate made of polyethylene material. The end of each roller 4 away from the cable clamp 1 moves through the closed end of the housing 3. The closed end of the housing 3 is the end opposite to the opening of the housing 3. The rotating shaft 5 is close to the closed end of the housing 3, and the end of the roller 4 facing the cable clamp 1 is close to the cable clamp 1. Each roller 4 has an annular groove 6 recessed on its bottom surface. The annular groove 6 is a downward-facing circular groove. The bottom surface of the roller 4 inside the annular groove 6 has an array of arc-shaped grooves 7. The outer end of each arc-shaped groove 7 is connected to the annular groove 6. Each roller 4 has a corresponding drive rod 8 on its lower side. The drive rod 8 is located in the housing 3 between the rotating shaft 5 and the cable clamp 1. The drive rod 8 is a rectangular rod. Both ends of the drive rod 8 slide into the sliding grooves 9 opened on the side plate of the housing 3. The top of the drive rod 8 is rotatably connected to a vertical rod 10. The vertical rod 10 is a round rod that is rotatably connected to the drive rod 8 via a bearing 21. The vertical rod 10 is located in the annular groove 6 or any arc-shaped groove 7 so that the drive rod 8 is close to or away from the cable clamp 1. The top pressure plate 2 is a rectangular plate made of polyetheretherketone. The top pressure plate 2 is slidably sleeved on the outside of the housing 3 through a sliding hole 11 opened in the middle. The top pressure plate 2 is elastically connected to the cable clamp 1. Both ends of each drive rod 8 extend out of the housing 3 and are fixedly connected to the side of the sliding hole 11.

[0033] The annular groove 6 is coaxial with the roller 4, and the annular groove 6 is located on the bottom surface of the corresponding roller near the edge. The housing 3 is provided with a through hole 12 for the end of the roller 4 away from the cable clamp 1 to move through. The upper and lower sides of the roller 4 slide in contact with the upper and lower sides of the through hole 12 respectively. The two ends of the through hole 12 are arc-shaped surfaces, and the circumferential surface of the roller slides in contact with the two arc-shaped surfaces of the through hole 12. The purpose of the above is to prevent coal slag and other materials from entering the housing 3.

[0034] Each roller 4 extending from the housing 3 has an arc-shaped plate 13 on its lower side. The arc-shaped plate 13 is a plate made of polyethylene material. The straight surface of the arc-shaped plate 13 is fixedly connected to the housing 3. The circle containing the arc surface of the arc-shaped plate 13 is coaxial with the annular groove 6 on the corresponding roller. The diameter of the circle containing the arc surface of the arc-shaped plate 13 is larger than the outer diameter of the annular groove 6 and smaller than the diameter of the roller. The bottom surface of the roller 4 extending from the housing 3 slides in contact with the top surface of the corresponding arc-shaped plate 13. The arc-shaped plate 13 is used to cover the annular groove 6 or arc groove 7 on the roller 4 extending from the housing 3 to prevent coal slag from entering the annular groove 6 or arc groove 7.

[0035] The arcuate curvature of the multiple arcuate grooves 7 on each roller 4 is in the same direction as the rolling direction of the roller when the cable clamp 1 moves forward; in the prior art, one end of the cable clamp 1 with the connecting lug 22 is the tail end, and the end opposite to the connecting lug 22 is the head end; multiple cable clamps are connected in series, with the head end of the cable clamp facing the coal mining machine and the tail end away from the coal mining machine, and the forward direction is the traction direction of the coal mining machine. The multiple cable clamps are pulled forward by the coal mining machine, and the head end moves forward when moving forward. The cable clamp 1 is located in the cable groove, and the roller 4 rolls and contacts the side plate of the cable groove; Figure 9 As shown, when the cable clamp 1 drives the right roller 4 forward, the right roller 4 rotates clockwise due to rolling contact with the cable trough, and the arc-shaped bends of the multiple arc-shaped grooves 7 on the roller 4 are oriented clockwise.

[0036] The slide 9 is a U-shaped groove with its opening facing the cable clamp 1. The U-shaped groove passes through the side plate of the housing 3, and the upper and lower sides of the end of the drive rod 8 slide in contact with the upper and lower sides of the slide 9.

[0037] The annular groove 6 has the same width as the arc groove 7, the same depth as the arc groove 7, and the diameter of the upright 10 corresponds to the annular groove 6.

[0038] The inner side of the sliding hole 11 on the top pressure plate 2 slides in contact with the outer side of the housing 3. The side edge of the top pressure plate 2 facing the cable clamp 1 is connected to the outer side of the cable clamp 1 via an elastic ring 14. The elastic ring 14 is a ring-shaped body made of nitrile rubber. Nitrile rubber has good elasticity, oil resistance, and wear resistance. Nitrile rubber has a low initial modulus when stretched and will not significantly hinder the outward movement of the top pressure plate 2. The top pressure plate 2 on both sides of the sliding hole 11 is provided with multiple through holes 15. The through holes 15 on both sides of the sliding hole 11 are symmetrical. The through holes 15 are far away from the cable clamp 1. The end is blocked by the sealing plate 16. Each through hole 15 is provided with a spring 17 with one end connected to the sealing plate 16 and the other end connected to the cable clamp 1. The top pressure plate 2 has blind holes 18 symmetrically arranged along the sliding hole 11 on the side facing the cable clamp 1. Each blind hole 18 opens towards one end of the cable clamp 1. The cable clamp 1 is fixed with a limiting rod 19 corresponding to the blind hole 18. Each blind hole 18 slides around the corresponding limiting rod 19. The through hole 15 and the blind hole 18 are both circular holes. The limiting rod 19 is a circular rod. The inner wall of each blind hole 18 slides in contact with the outer wall of the limiting rod 19.

[0039] When the upright 10 on each of the drive rods 8 is located in the annular groove 6 on the corresponding roller 4, the elastic ring 14 connecting the top pressure plate 2 and the cable clamp 1 is in a natural state, the multiple springs 17 on the top pressure plate 2 are in a fully compressed state, and the end of each roller 4 away from the cable clamp 1 extends out of the sliding hole 11 on the same side of the top pressure plate 2.

[0040] When the upright 10 on the drive rod 8 is located inside any arc groove 7, the multiple springs 17 on the top pressure plate 2 are in a semi-compressed state. The drive rod 8 drives the top pressure plate away from the cable clamp 1 to the limit state. The drive rod 8 approaches the rotating shaft 5, and one end of the roller 4 extending out of the housing 3 is located in the sliding hole 11. The purpose of the above is to enable the top pressure plate to press against the side wall of the cable groove.

[0041] The side of the top pressure plate 2 away from the cable clamp 1 has a rough surface formed by sandblasting.

[0042] Before use, the cable used to power the coal mining machine is located in the cable trough. Multiple cable clamps 1 are connected in series on the outside of the cable in the cable trough. The multiple cable clamps 1 protect the cable. In the initial state, the upright 10 on each drive rod 8 is located in the annular groove 6 of the corresponding roller 4. Multiple rollers 4 on both sides of each cable clamp 1 roll in contact with the side wall of the cable trough. There is a gap between the top pressure plate 2 on the same side of the roller 4 and the side wall of the cable trough. The spring 17 on the top pressure plate 2 is in a fully compressed state.

[0043] During use, the coal mining machine drags the cable and cable clamp 1 along the cable trough, such as... Figure 9 As shown, taking the right-side limiting part as an example, when the multiple rollers 4 on the right side move forward with the cable clamp 1, they roll and contact the side wall of the cable trough. At this time, the multiple rollers 4 rotate clockwise (the clockwise rotation of the rollers 4 is...). Figure 9 From the perspective of [the viewpoint], the annular groove 6 and arc-shaped groove 7 on roller 4 also rotate clockwise with roller 4, and the arc-shaped bends of multiple arc-shaped grooves 7 on roller 4 are all oriented clockwise. Although multiple springs 17 drive the top pressure plate 2 to exert a force away from the cable clamp 1, even if the top pressure plate 2 drives the drive rod 8 away from the cable clamp 1, when the upright rod 10 on the drive rod 8 enters any arc-shaped groove 7 with its outer end facing the upright rod 10, since the arc-shaped groove 7 rotates clockwise with roller 4 at this time, and the arc-shaped bend of the arc-shaped groove 7 is in a clockwise direction, the side of the arc-shaped groove 7 that accommodates the upright rod 10 will drive the upright rod 10 inside it to move during the clockwise rotation. Therefore, as the cable clamp 1 moves forward and the roller 4 rolls clockwise, multiple uprights 10 can be kept within the annular groove 6 on the corresponding roller 4, thereby keeping the drive rod 8 corresponding to the upright 10 close to the cable clamp 1. This ensures that the side of the top pressure plate 2 away from the cable clamp 1 does not press against the side wall of the cable trough, thus avoiding pressure on the cable trough caused by the top pressure plate 2 and reducing the resistance to the forward movement of the cable clamp 1 and the cable. Similarly, when the left limiting part moves forward with the cable clamp 1, the multiple counterclockwise rolling rollers 4 can prevent the top pressure plate on the left side from pressing against the left side wall of the cable trough, thus reducing the resistance to the forward movement of the cable clamp 1 and the cable.

[0044] When the coal mining machine stops driving the cable and cable clamp 1 forward, the cable clamp 1 and the cable move backward along the inclined cable trough under their own weight. The cable clamp 1 drives the limiting parts on both sides to move backward. The multiple rollers 4 on the right limiting part rotate counterclockwise because they are in contact with the side wall of the cable trough. The multiple springs 17 exert a force on the top pressure plate 2 away from the cable clamp 1. The top pressure plate 2 drives the drive rod 8 away from the cable clamp 1. The upright rod 10 on the drive rod 8 enters any of the arc-shaped grooves 7 with its outer end facing the upright rod 10. At this time, the arc-shaped groove 7 rotates counterclockwise with the rollers 4. Since the arc curvature of the arc-shaped groove 7 is clockwise, when the arc-shaped groove 7 rotates counterclockwise, the side of the arc-shaped groove 7 can press against the upright rod 1 inside it. 0 moves toward the inner end of the arc groove 7. The upright rod 10 drives the top pressure plate 2 to move away from the cable clamp 1 via the drive rod 8. Together with the elastic force given to the top pressure plate 2 by the spring 17, it further drives the top pressure plate 2 away from the cable clamp 1 and presses against the side wall of the cable trough (at this time, the right roller remains in contact with the side wall of the cable trough). Moreover, when the top pressure plate moves away from the cable clamp, the elastic ring connected to the top pressure plate is stretched to prevent slag from entering between the top pressure plate and the cable clamp, and to prevent slag from entering the housing through the chute. Similarly, the top pressure plate 2 on the left limiting part of the cable clamp 1 can press against the left side wall of the cable trough under the action of multiple rollers 4 on the left. After the top pressure plates 2 on both sides of the cable clamp 1 press against the side wall of the cable trough, the cable clamp 1 is braked and stops moving backward.

[0045] Furthermore, as the coal mining machine continues to advance the cable and cable clamp 1, the multiple rollers 4 on the right rotate clockwise. The side of the arc groove 7 on the roller 4 presses against and drives the internal upright 10 to move into the annular groove 6, thereby causing the top pressure plate 2 to return to its initial position. The spring on the top pressure plate is compressed and stores energy. As the multiple rollers continue to rotate clockwise, the top pressure plate maintains a distance from the side wall of the cable trough. Similarly, the top pressure plate 2 on the left returns to its initial position, reducing the resistance to the advancement of the cable and cable clamp 1.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A cable-dragging device for a coal mining machine, comprising a cable clamp (1), characterized in that, It also includes limiting parts symmetrically arranged on two vertical outer sides of the cable clamp (1). The limiting parts include a driving component and a top pressure plate (2). The driving component includes a housing (3) and rollers (4). The open end of the housing (3) is fixedly connected to the corresponding vertical outer side of the cable clamp (1). A rotating shaft (5) is provided vertically inside the housing (3). Rollers (4) are fixedly sleeved on the rotating shaft (5) at intervals. Each roller (4) moves through the closed end of the housing (3) at the end away from the cable clamp (1). Each roller (4) has an annular groove (6) recessed on the bottom surface. The bottom surface of the roller (4) inside the annular groove (6) has an arc-shaped groove (7) arranged in an annular array. The outer end of each arc-shaped groove (7) is connected to the annular groove (6). Each roller (4) is provided with a corresponding drive rod (8) on its lower side. The drive rod (8) is located in the housing (3) between the rotating shaft (5) and the cable clamp (1). The two ends of the drive rod (8) slide into the groove (9) opened on the side plate of the housing (3). The top of the drive rod (8) is rotatably connected to a vertical rod (10). The vertical rod (10) is located in the annular groove (6) or any arc groove (7) so that the drive rod (8) is close to or away from the cable clamp (1). The top pressure plate (2) is slidably sleeved on the outside of the housing (3) through the sliding hole (11). The top pressure plate (2) is elastically connected to the cable clamp (1). The two ends of each drive rod (8) extend out of the housing (3) and are fixedly connected to the side of the sliding hole (11).

2. The coal mining machine cable-dragging device according to claim 1, characterized in that, The annular groove (6) is coaxial with the roller (4) and is located on the bottom surface of the corresponding roller near the edge. The housing (3) is provided with a through hole (12) through which the end of the roller (4) away from the cable clamp (1) moves.

3. The coal mining machine cable-dragging device according to claim 2, characterized in that, Each roller (4) extending out of the housing (3) is provided with an arc-shaped plate (13) on its lower side. The straight surface of the arc-shaped plate (13) is fixedly connected to the housing (3). The circle where the arc surface of the arc-shaped plate (13) is located is coaxial with the annular groove (6) on the corresponding roller. The diameter of the circle where the arc surface of the arc-shaped plate (13) is located is greater than the outer diameter of the annular groove (6) and smaller than the diameter of the roller. The bottom surface of the roller (4) extending out of the housing (3) slides in contact with the top surface of the corresponding arc-shaped plate (13).

4. A coal mining machine cable-dragging device according to claim 1, characterized in that, The arcuate curves of the multiple arcuate grooves (7) on each roller (4) are oriented in the same direction as the rolling direction of the roller when the cable clamp (1) moves forward.

5. A coal mining machine cable-dragging device according to claim 1, characterized in that, The groove (9) is a U-shaped groove with its opening facing the cable clamp (1), and the upper and lower sides of the end of the drive rod (8) slide in contact with the upper and lower sides of the groove (9).

6. A coal mining machine cable-dragging device according to claim 1, characterized in that, The width of the annular groove (6) is equal to the width of the arc groove (7), the depth of the annular groove (6) is equal to the depth of the arc groove (7), and the diameter of the upright (10) corresponds to the width of the annular groove (6).

7. A coal mining machine cable-dragging device according to claim 6, characterized in that, The top pressure plate (2) is connected to the outer side of the cable clamp (1) via an elastic ring (14) on the side edge facing the cable clamp (1). The top pressure plate (2) on both sides of the sliding hole (11) is provided with multiple through holes (15). The end of the through hole (15) away from the cable clamp (1) is blocked by a sealing plate (16). Each through hole (15) is provided with a spring (17) with one end connected to the sealing plate (16) and the other end connected to the cable clamp (1). The top pressure plate (2) is provided with blind holes (18) symmetrical along the sliding hole (11) on the side facing the cable clamp (1). The cable clamp (1) is fixed with a limiting rod (19) corresponding to the blind hole (18). Each blind hole (18) is slidably sleeved outside the corresponding limiting rod (19).

8. A coal mining machine cable-dragging device according to claim 7, characterized in that, When the upright (10) on each of the drive rods (8) is located in the annular groove (6) on the corresponding roller (4), the elastic ring (14) is in a natural state, the multiple springs (17) on the top pressure plate (2) are in a fully compressed state, and the end of each roller (4) away from the cable clamp (1) extends out of the sliding hole (11) on the top pressure plate (2) on the same side.

9. A coal mining machine cable-dragging device according to claim 8, characterized in that, When the upright (10) on the drive rod (8) is located inside any arc groove (7), the multiple springs (17) on the top pressure plate (2) are in a semi-compressed state. The drive rod (8) drives the top pressure plate away from the cable clamp (1) to the limit state. The drive rod (8) approaches the rotating shaft (5), and one end of the roller (4) extending out of the housing (3) is located in the sliding hole (11).

10. A coal mining machine cable-dragging device according to claim 1, characterized in that, The side of the top pressure plate (2) away from the cable clamp (1) is a rough surface formed by sandblasting.

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