Rope breakage protection device

Abstract

The utility model discloses a rope breakage protection device which comprises a track, a trolley and two sets of side fixing plates. According to the utility model, the main inhaul cable is broken. Through the combined action of the gravity of the balance weight ball and the tension of the tension spring, the maximum outer diameter positions of the first eccentric wheel and the second eccentric wheel are rapidly driven to abut against and clamp an upper rail plate, braking is formed, and the safety protection effect is achieved; the traction force is prevented from being applied to the tension spring during traction of the main inhaul cable, the service life of the tension spring is prolonged, the device is in rolling connection with the track through the four first rollers and the four second rollers, and the risk of vertical shaking in the traditional technology is avoided; when the first eccentric wheel and the second eccentric wheel are braked, the device does not need to be lifted, the balance weight effect of the balance weight rod and the balance weight ball is greatly improved, and braking is very rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of track transportation protection, in particular to a rope-breaking protection device. Background Art

[0002] In the prior art, when a slope (steep slope) track transportation is towed, in order to avoid the trolley on the track getting out of control due to the sudden breakage of the steel wire rope used for towing, a protection device is usually required. The traditional safety protection device is either complex to install and has many procedures, or its safety is not easily guaranteed.

[0003] In order to solve the above problems, a track transportation rope-breaking protection device was previously disclosed. In this device, a weight is connected to the main towing rope of the track vehicle through a steel wire rope, and the weight is connected to the track vehicle through another steel wire rope and a spring. The weight is connected to a wheel and a wheel axle as a whole through a non-rotating pin, etc., to ensure that they can rotate simultaneously. The wheel is an eccentric ratchet. When its small radius contacts the track surface, due to the action of gravity, a gap of 1-3 mm is formed between the brake pin and the track, and the wheel slides on the track surface to ensure the normal operation of the track vehicle. When the main towing rope of the track vehicle breaks, the steel wire rope between the main towing rope and the weight will surely be broken or become slack. Under the dual action of its own gravity and the spring tension, the weight rotates clockwise and drives the eccentric ratchet to rotate synchronously, raising the bearing seat, so that the distance between the brake pin and the track quickly shrinks to 0, and the track is clamped jointly by the eccentric ratchet and the brake pin to achieve the purpose of locking (protecting) the track vehicle.

[0004] It can be seen from its specification that in the initial stage of the steel wire rope breakage, the weight is driven to rotate by the spring tension. When it rotates to a certain angle, it can only rely on the self-weight of the weight to fall and drive the eccentric ratchet to rotate. At this time, the eccentric ratchet needs to overcome the gravity of the whole device to drive the eccentric ratchet to rotate and raise the bearing seat. It is difficult to raise the bearing seat only by the self-weight of the weight. In addition, when the main towing rope is towing, actually part of the force is shared by the steel wire rope and the spring between the weight and the trolley. Although the strength requirements of the two groups of steel wire ropes are set, the strength of the spring is not restricted, and there is no limit structure when the weight is towed, which easily causes the spring to be damaged. Moreover, in its device, the eccentric ratchet is slidingly connected to the track during daily use and there is a gap between the brake pin and the track, that is, there is a situation of up and down shaking when the traction force changes, which easily causes the distance between the brake pin and the eccentric ratchet to become larger and fails to achieve the required protection effect. Therefore, it is necessary to further improve and optimize this structure. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rope-breaking protection device to solve the deficiencies existing in the prior art.

[0006] To achieve the above object, the utility model adopts the following technical solutions: a rope-breaking protection device, including a track, a trolley, and two sets of side fixing plates. The track is composed of an upper plate, a lower plate, and a vertical plate arranged between the upper plate and the lower plate. The trolley is arranged on the upper wall of the track. The two sets of side fixing plates are respectively arranged on the front and rear sides of the upper plate of the track and are both located on the left side of the trolley. The tops of the two sets of side fixing plates are fixedly connected with a top connecting plate. The sides of the two sets of side fixing plates away from the trolley and located above the track are fixedly connected with a side connecting plate. A first rotating rod is rotatably connected between the opposite sides of the two sets of side fixing plates and above the upper plate. A set of second rotating rods are respectively rotatably connected between the opposite sides of the two sets of side fixing plates and at the position between the upper plate and the lower plate. Two sets of first eccentric wheels are fixedly connected to the outer wall of the first rotating rod and between the two sets of side fixing plates. A set of second eccentric wheels are respectively fixedly connected to the outer walls of the two sets of second rotating rods.

[0007] As a further description of the above technical solution:

[0008] A linkage structure for driving the second rotating rod to rotate when the first rotating rod rotates is arranged on the opposite sides of the two sets of side fixing plates. A set of upper fixing strips are respectively fixedly connected between the opposite sides of the two sets of side fixing plates and above the upper plate and the first rotating rod. A set of lower fixing strips are respectively fixedly connected between the opposite sides of the two sets of side fixing plates and between the upper plate and the second rotating rod. Two sets of first rotating shafts are fixedly connected between the opposite sides of the two sets of upper fixing strips. A set of second rotating shafts are respectively fixedly connected to the opposite sides of the two sets of lower fixing strips and near the left and right ends. A rolling structure for rolling connection with the upper plate is arranged on the outer walls of the first rotating shaft and the second rotating shaft. A counterweight rod is fixedly connected to the outer wall of the first rotating rod and between the two sets of first eccentric wheels. A counterweight structure is arranged at the end of the counterweight rod away from the first rotating rod. A tension structure is arranged between the counterweight rod and the set of first rotating shafts close to the trolley among the two sets of first rotating shafts.

[0009] As a further description of the above technical solution:

[0010] The side of the counterweight rod away from the trolley is fixedly connected with a main cable through a pull rod. When the main cable pulls the counterweight rod, its leftward movement position is restricted by the top connecting plate, and when it is at the limit point, the included angle between the central line in the length direction of the counterweight rod and the length direction of the upper wall of the upper plate is sixty degrees. When the counterweight rod is at the limit point, there is a three-millimeter gap between the outer wall of the first eccentric wheel and the upper wall of the upper plate, and between the outer wall of the second eccentric wheel and the lower wall of the upper plate. When the counterweight rod rotates in the front view direction until the central line in the length direction of the counterweight rod is parallel to the length direction of the upper wall of the upper plate, the outer wall of the first eccentric wheel starts to contact the upper wall of the upper plate, and the outer wall of the second eccentric wheel starts to contact the lower wall of the upper plate.

[0011] As a further description of the above technical solution:

[0012] The linkage structure includes two sets of protective covers and four sets of gears. The two sets of protective covers are respectively fixedly connected to the opposite sides of the two side fixing plates. The four sets of gears are arranged in pairs of two on the inner side walls of the two sets of protective covers. The left and right ends of the first rotating rod and the opposite ends of the two second rotating rods respectively penetrate through the inner walls of the two side fixing plates and extend into the two sets of protective covers. The four sets of gears are respectively fixedly connected to the front and rear ends of the first rotating rod and the opposite ends of the two second rotating rods. The outer walls of the two sets of gears located inside the same set of protective covers are meshed with each other.

[0013] As a further description of the above technical solution:

[0014] The rolling structure includes four sets of first rollers and four sets of second rollers. The four sets of first rollers are respectively rotatably connected to the outer walls of two sets of first rotating shafts in pairs. The four sets of second rollers are respectively rotatably connected to the outer walls of four sets of second rotating shafts. The outer walls of the four sets of first rollers are all in rolling connection with the upper wall of the upper plate. The outer walls of the four sets of second rollers are all in rolling connection with the lower wall of the upper plate.

[0015] As a further description of the above technical solution:

[0016] The weight structure is a weight ball, and the weight ball is fixedly connected to the end of the weight rod away from the first rotating rod.

[0017] As a further description of the above technical solution:

[0018] The tension structure is a tension spring, and the tension spring is fixedly connected between the weight rod and the outer wall of one of the first rotating shafts close to the trolley through two hanging hooks.

[0019] As a further description of the above technical solution:

[0020] Brake pads are fixedly connected to the maximum outer diameter of the circumferential outer walls of the first eccentric wheel and the second eccentric wheel.

[0021] As a further description of the above technical solution:

[0022] On the sides of the two side fixing plates facing the trolley, connection seats for hinging with the trolley are provided.

[0023] The utility model has the following beneficial effects:

[0024] 1. Compared with the prior art, when the main cable breaks in this rope-breaking protection device, under the combined action of the gravity of the weight ball and the tension of the tension spring, the first rotating rod is quickly driven to rotate. When the first rotating rod rotates, the second rotating rod is driven to rotate through two sets of gears. The first eccentric wheel and the second eccentric wheel on the outer walls of the first rotating rod and the second rotating rod are in contact with and clamped against the upper plate of the track at the maximum outer diameter, forming braking and playing a safety protection role.

[0025] 2. Compared with the prior art, in this rope-breaking protection device, a top connecting plate is arranged on the upper wall of the side fixing plate, and the top connecting plate is used as a limiting function for the counterweight rod during traction, avoiding the traction force being applied to the tension spring when the main cable is pulled, and improving the service life of the tension spring;

[0026] 3. Compared with the prior art, in this rope-breaking protection device, the device is connected to the track in a rolling manner through four groups of first rollers and four groups of second rollers, avoiding the risk of up-and-down shaking existing in the traditional technology. At the same time, through the support of four groups of first rollers and four groups of second rollers, when the first eccentric wheel and the second eccentric wheel brake, it is not necessary to lift the device, greatly improving the counterweight effect of the counterweight rod and the counterweight ball, and the braking is very rapid. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the overall structure of the rope-breaking protection device proposed by the present utility model;

[0028] Figure 2 is a schematic side view of the overall structure of the rope-breaking protection device proposed by the present utility model;

[0029] Figure 3 is a partial side sectional view of the connection structure of the side fixing plate, the protective cover, the gear, the first rotating rod, the second rotating rod, the first eccentric wheel and the second eccentric wheel of the rope-breaking protection device proposed by the present utility model;

[0030] Figure 4 is a sectional view of the connection structure of the first eccentric wheel and the brake pad of the rope-breaking protection device proposed by the present utility model.

[0031] Legend Explanation:

[0032] 1. Track; 2. Side fixing plate; 3. Protective cover; 4. First rotating rod; 5. Second rotating rod; 6. Side connecting plate; 7. Top connecting plate; 8. Counterweight rod; 9. Counterweight ball; 10. Pull rod; 11. Main cable; 12. Connecting seat; 13. Tension spring; 14. Upper fixing strip; 15. Lower fixing strip; 16. First rotating shaft; 17. First roller; 18. Second rotating shaft; 19. Second roller; 20. First eccentric wheel; 21. Second eccentric wheel; 22. Gear; 23. Brake pad. Detailed Embodiment

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] Refer toFigures 1 to 4 , the rope-breaking protection device provided by the utility model includes a track 1, a trolley, and two sets of side fixing plates 2. The track 1 is composed of an upper plate, a lower plate, and a vertical plate arranged between the upper plate and the lower plate. The trolley is arranged on the upper wall of the track 1. The two sets of side fixing plates 2 are respectively arranged on the front and rear sides of the upper plate of the track 1 and are both located on the left side of the trolley. A connecting seat 12 for hinging with the trolley is arranged on one side of each of the two sets of side fixing plates 2 facing the trolley. In this embodiment, the connection method between the trolley and the track 1 and the traction device are both consistent with the prior art;

[0035] As Figure 1 and Figure 2 shown, in order to maintain the connection strength of the two sets of side fixing plates 2, a top connecting plate 7 is fixedly connected to the tops of the two sets of side fixing plates 2. A side connecting plate 6 is fixedly connected to the side of each of the two sets of side fixing plates 2 away from the trolley and above the track 1. Through the top connecting plate 7 and the side connecting plate 6, the two sets of side fixing plates 2 can be connected together to improve the overall strength of the device during braking;

[0036] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, in order to achieve the function of emergency braking, a first rotating rod 4 is rotatably connected between the opposite sides of two groups of side fixing plates 2 and above the upper plate. A group of second rotating rods 5 are rotatably connected between the opposite sides of the two groups of side fixing plates 2 and at the positions between the upper plate and the lower plate respectively. Two first eccentric wheels 20 are fixedly connected to the outer wall of the first rotating rod 4 and between the two groups of side fixing plates 2. A group of second eccentric wheels 21 are fixedly connected to the outer walls of the two groups of second rotating rods 5 respectively. The side of the counterweight rod 8 away from the trolley is fixedly connected to the main cable 11 through the pull rod 10. When the main cable 11 pulls the counterweight rod 8, the leftward movement position is restricted by the top connecting plate 7, and when it is at the limit point, the included angle between the central line in the length direction of the counterweight rod 8 and the upper wall of the upper plate in the length direction is 60 degrees. When the counterweight rod 8 is at the limit point, there is a 3-mm gap between the outer wall of the first eccentric wheel 20 and the upper wall of the upper plate, and between the outer wall of the second eccentric wheel 21 and the lower wall of the upper plate. When the counterweight rod 8 rotates in the front view direction until the central line in the length direction of the counterweight rod 8 is parallel to the upper wall of the upper plate in the length direction, the outer wall of the first eccentric wheel 20 begins to abut against the upper wall of the upper plate, and the outer wall of the second eccentric wheel 21 begins to abut against the lower wall of the upper plate. Brake pads 23 are fixedly connected to the maximum outer diameter of the circumferential outer walls of the first eccentric wheel 20 and the second eccentric wheel 21. During daily traction operations, the first eccentric wheel 20 and the second eccentric wheel 21 do not contact the track 1. When the main cable 11 breaks, through the counterweight of the counterweight ball 9 and the pulling of the tension spring 13, the first rotating rod 4 is driven to rotate. When the first rotating rod 4 rotates, the second rotating rod 5 is driven to rotate through the four groups of gears 22. Furthermore, the maximum outer diameter of the first eccentric wheel 20 and the second eccentric wheel 21 rotates to abut against the upper plate of the track 1 and forms a clamping state to achieve braking. When the trolley slides downhill to the right, the clamping state will become tighter and tighter, playing a role in full braking. The brake pads 23 can improve the braking effect.

[0037] As Figure 1 , Figure 2 and Figure 3 shown, in order to maintain the synchronous movement of the first eccentric wheel 20 and the second eccentric wheel 21, a linkage structure for driving the second rotating rod 5 to rotate when the first rotating rod 4 rotates is provided on the opposite sides of the two groups of side fixing plates 2. The linkage structure includes two protective covers 3 and four groups of gears 22. The two protective covers 3 are respectively fixedly connected to the opposite sides of the two groups of side fixing plates 2. The four groups of gears 22 are arranged in pairs and on the inner side walls of the two protective covers 3 respectively. The left and right ends of the first rotating rod 4 and the opposite ends of the two groups of second rotating rods 5 respectively penetrate the inner walls of the two groups of side fixing plates 2 and extend into the two protective covers 3. The four groups of gears 22 are respectively fixedly connected to the front and rear ends of the first rotating rod 4 and the opposite ends of the two groups of second rotating rods 5. The outer walls of the two groups of gears 22 located inside the same protective cover 3 among the four groups of gears 22 are meshed with each other. Through the meshing action of the gears 22, when the first rotating rod 4 rotates, the second rotating rod 5 can be driven to move synchronously;

[0038] As Figure 1 ,Figure 2 As shown, in order to improve the service life of the device, a set of upper fixing bars 14 are fixedly connected respectively on the opposite sides of the two sets of side fixing plates 2 and between the upper plate and the first rotating rod 4. A set of lower fixing bars 15 are fixedly connected respectively between the opposite sides of the two sets of side fixing plates 2 and between the upper plate and the second rotating rod 5. Two sets of first rotating shafts 16 are fixedly connected between the opposite sides of the two sets of upper fixing bars 14. A set of second rotating shafts 18 are fixedly connected respectively on the opposite sides of the two sets of lower fixing bars 15 and near the left and right ends. A rolling structure for rolling connection with the upper plate is arranged on the outer walls of the first rotating shaft 16 and the second rotating shaft 18. The rolling structure includes four sets of first rollers 17 and four sets of second rollers 19. The four sets of first rollers 17 are respectively rotatably connected in pairs on the outer walls of the two sets of first rotating shafts 16. The four sets of second rollers 19 are respectively rotatably connected on the outer walls of the four sets of second rotating shafts 18. The outer walls of the four sets of first rollers 17 are all in rolling connection with the upper wall of the upper plate. The outer walls of the four sets of second rollers 19 are all in rolling connection with the lower wall of the upper plate. The device is in rolling connection with the upper plate of the track 1 through the four sets of first rollers 17 and the second rollers 19, which can avoid the shaking of the device during traction, effectively avoid the up and down impact, and improve the service life of the device components.

[0039] As Figure 1 , Figure 2 shown, in order to drive the first rotating rod 4 when the main cable 11 breaks, a counterweight rod 8 is fixedly connected on the outer wall of the first rotating rod 4 and between the two sets of first eccentric wheels 20. A counterweight structure is arranged at the end of the counterweight rod 8 away from the first rotating rod 4. The counterweight structure is a counterweight ball 9, and the counterweight ball 9 is fixedly connected to the end of the counterweight rod 8 away from the first rotating rod 4. A tension structure is arranged between the counterweight rod 8 and the set of first rotating shafts 16 close to the trolley among the two sets of first rotating shafts 16. The tension structure is a tension spring 13. The tension spring 13 is fixedly connected between the counterweight rod 8 and the outer wall of the set of first rotating shafts 16 close to the trolley among the two sets of first rotating shafts 16 through two sets of hanging hooks. After the main cable 11 breaks, the driving force for driving the first rotating rod 4 is greatly increased by the combined action of the self-weight of the counterweight ball 9 and the tension of the tension spring 13, thereby effectively improving the braking force.

[0040] Working principle: Through the top connecting plate 7 and the side connecting plate 6, two groups of side fixing plates 2 can be connected together to improve the overall strength of the device during braking. During daily traction operations, the first eccentric wheel 20 and the second eccentric wheel 21 do not contact the track 1. After the main cable 11 breaks, through the weight of the counterweight ball 9 and the pulling of the tension spring 13, the first rotating rod 4 is driven to rotate. When the first rotating rod 4 rotates, the second rotating rod 5 is driven to rotate through four groups of gears 22. Furthermore, the maximum outer diameter of the first eccentric wheel 20 and the second eccentric wheel 21 rotates to abut against the upper plate of the track 1 and form a clamping state to achieve braking. Moreover, when the trolley slides downhill to the right, the clamping state will become tighter and tighter, playing a role of full braking. The brake pads 23 can improve the braking effect. The outer walls of the two groups of gears 22 located inside the same group of protective covers 3 among the four groups of gears 22 are meshed with each other. Through the meshing action of the gears 22, when the first rotating rod 4 rotates, it can drive the second rotating rod 5 to act synchronously. The device is connected to the upper plate of the track 1 through four groups of first rollers 17 and second rollers 19, which can avoid the shaking of the device during traction, effectively avoid up and down impacts, and improve the service life of the device components. After the main cable 11 breaks, through the combined action of the self-weight of the counterweight ball 9 and the pulling force of the tension spring 13, the driving force for driving the first rotating rod 4 is greatly increased, thereby effectively increasing the braking force.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Rope breaking protection device, characterized by: The invention comprises a track (1), a trolley and two groups of side fixing plates (2), wherein the track (1) is composed of an upper plate, a lower plate and a vertical plate arranged between the upper plate and the lower plate, the trolley is arranged on the upper wall of the track (1), the two groups of side fixing plates (2) are respectively arranged on the front and rear sides of the upper plate of the track (1) and are both located on the left side of the trolley, the tops of the two groups of side fixing plates (2) are fixedly connected to a top connecting plate (7), the two groups of side fixing plates (2) are fixedly connected to a side connecting plate (6) on the side away from the trolley and located on the upper side of the track (1), a first rotating rod (4) is rotatably connected between the two groups of side fixing plates (2) on the opposite sides and located on the upper side of the upper plate, a group of second rotating rods (5) is rotatably connected between the two groups of side fixing plates (2) on the opposite sides and located between the upper plate and the lower plate, two groups of first eccentric wheels (20) are fixedly connected to the outer wall of the first rotating rod (4) and are located between the two groups of side fixing plates (2), and a group of second eccentric wheels (21) are fixedly connected to the outer walls of the two groups of second rotating rods (5).

2. The rope breaking protection device according to claim 1, characterized in that: A linkage structure is provided on the opposite side of the two sets of side fixing plates (2) for driving the second rotating rod (5) to rotate when the first rotating rod (4) rotates; a set of upper fixing bars (14) are fixedly connected to the opposite side of the two sets of side fixing plates (2) and located between the upper plate and the first rotating rod (4); a set of lower fixing bars (15) are fixedly connected to the opposite side of the two sets of side fixing plates (2) and located between the upper plate and the second rotating rod (5); two sets of first rotating shafts (16) are fixedly connected to the opposite side of the two sets of upper fixing bars (14); A group of second rotating shafts (18) are fixedly connected to the opposite side of the lower fixed bar (15) and near the left and right ends respectively; the outer walls of the first rotating shaft (16) and the second rotating shaft (18) are provided with rolling structures for rolling connection with the upper plate; a counterweight rod (8) is fixedly connected to the outer wall of the first rotating rod (4) and located between the two groups of first eccentric wheels (20); a counterweight structure is provided at one end of the counterweight rod (8) away from the first rotating rod (4); and a tension structure is provided between the counterweight rod (8) and one of the two groups of first rotating shafts (16) near the trolley.

3. The rope breaking protection device according to claim 2, characterized in that: The side of the counterweight rod (8) away from the trolley is fixedly connected to the main cable (11) through the pull rod (10). When the main cable (11) pulls the counterweight rod (8), the leftward movement position is limited by the top connecting plate (7). When the counterweight rod (8) is located at the limit point, the angle between the center line of the length direction of the counterweight rod (8) and the length direction of the upper wall of the upper plate is sixty degrees. When the counterweight rod (8) is located at the limit point, a three-millimeter gap is set between the outer wall of the first eccentric wheel (20) and the upper wall of the upper plate, and between the outer wall of the second eccentric wheel (21) and the lower wall of the upper plate. When the counterweight rod (8) is rotated in the front view direction until the center line of the length direction of the counterweight rod (8) is parallel to the length direction of the upper wall of the upper plate, the outer wall of the first eccentric wheel (20) and the upper wall of the upper plate, and the outer wall of the second eccentric wheel (21) and the lower wall of the upper plate begin to abut.

4. The rope breaking protection device according to claim 3, characterized in that: The linkage structure comprises two groups of protective covers (3) and four groups of gears (22). The two groups of protective covers (3) are respectively fixedly connected to the opposite sides of the two groups of side fixing plates (2). The four groups of gears (22) are arranged in pairs on the inner side walls of the two groups of protective covers (3). The left and right ends of the first rotating rod (4) and the opposite ends of the two groups of second rotating rods (5) respectively penetrate the inner walls of the two groups of side fixing plates (2) and extend into the interiors of the two groups of protective covers (3). The four groups of gears (22) are respectively fixedly connected to the front and rear ends of the first rotating rod (4) and the opposite ends of the two groups of second rotating rods (5). The outer walls of two groups of gears (22) located inside the same group of protective covers (3) are meshed with each other.

5. The rope breaking protection device according to claim 4, characterized in that: The rolling structure comprises four groups of first rollers (17) and four groups of second rollers (19). The four groups of first rollers (17) are rotatably connected to the outer walls of the two groups of first rotating shafts (16) in pairs, and the four groups of second rollers (19) are rotatably connected to the outer walls of the four groups of second rotating shafts (18). The outer walls of the four groups of first rollers (17) are all rollingly connected to the upper wall of the upper plate, and the outer walls of the four groups of second rollers (19) are all rollingly connected to the lower wall of the upper plate.

6. The rope breaking protection device according to claim 5, characterized in that: The counterweight structure is a counterweight ball (9), and the counterweight ball (9) is fixedly connected to an end of the counterweight rod (8) away from the first rotating rod (4).

7. The rope breaking protection device according to claim 6, characterized in that: The tension structure is a tension spring (13), and the tension spring (13) is fixedly connected between the counterweight rod (8) and the outer wall of one of the two sets of first rotating shafts (16) close to the trolley through two sets of hooks.

8. The rope breaking protection device according to claim 7, characterized in that: Brake pads (23) are fixedly connected at the maximum outer diameter of the circumferential outer walls of the first eccentric wheel (20) and the second eccentric wheel (21).

9. The rope breaking protection device according to claim 8, characterized in that: The two sets of side fixing plates (2) are both provided with a connecting seat (12) on the side facing the trolley for being hinged to the trolley.

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