Crane hook pulley rope falling prevention device

Abstract

The invention relates to the technical field of hoisting equipment, in particular to a crane hook pulley rope falling prevention device which comprises side plates, a limiting pin and a rolling wheel and further comprises a hook body, a bevel gear ring, a transmission assembly, a falling prevention strip, a buckle head assembly, an attaching block and a strong magnetic block, the hook body is installed between the two side plates, and a connecting column is integrally formed at the top of the hook body; the connecting column is rotatably connected with the side plate in a limiting mode, and a bent part is integrally formed at the end of the hook body. When the transmission assembly rotates, the transmission assembly is matched with the bevel gear ring to provide power input for the transmission assembly, then the buckle head assembly is controlled to horizontally move along the sliding groove, and when the anti-disengaging strip is attached to the bent portion of the hook body, the buckle head assembly is attached to the concave position of the bent portion under the action of elastic force, and the problem that in the prior art, the buckle head assembly is prone to disengagement is solved. When a harbor crane selects a thicker steel wire rope, the harbor crane is easily subjected to strong wind, so that the abrasion of a spring pinch plate is aggravated, the spring pinch plate needs to be frequently replaced, and the container hoisting operation efficiency of the harbor crane is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, in particular to a crane hook pulley anti-rope-slip device. Background Art

[0002] A crane is a mechanical device used for lifting and transporting heavy objects vertically or horizontally. Through the coordination of its mechanical structure and power system, it enables precise control and efficient transportation of heavy objects. It is widely used in industries such as industry, construction, ports, and logistics. In the port sector, cranes are often equipped with port container crane remote control systems, which enable remote lifting of containers, significantly improving container handling efficiency.

[0003] If the wire rope slips out of the pulley or hook groove, it will cause the sling or load to lose control instantly, leading to serious accidents such as falls and collisions. The wire rope that slips out of the groove may be entangled or hit the crane structure (such as the pulley bracket and metal frame), causing mechanical parts to deform, crack or even break. Therefore, setting an anti-rope slip structure on the hook is a core requirement in crane safety design.

[0004] In the prior art, the anti-rope-slip structure installed on the hook is mostly a spring buckle. When the end knot of the wire rope is hung on the hook, the wire rope presses down on the spring buckle, and then the spring buckle is reset to limit the wire rope and prevent it from slipping off. However, in the actual use of port cranes, it is found that due to the differences in the weight of the cargo loaded in the lifted containers and the difficulty in replacing the wire rope, thicker wire ropes are usually selected to ensure that the wire rope is sufficient to lift heavier container cargo. When lifting containers, it is found that due to the special geographical location and environmental conditions of the port, it is easily affected by strong winds. In particular, when a strong wind suddenly blows when lifting lighter container cargo, the container will inevitably swing to a certain extent, and the container will drive the thick wire rope to swing and push the spring buckle upward. The end of the spring buckle plate forms a limiting and anti-slip effect by contacting the inner side of the hook body. In this case, the contact position between the spring buckle plate and the hook body is aggravated by wear, resulting in the spring buckle plate failing to contact the hook body after long-term use. As a result, the spring buckle plate needs to be replaced frequently, which makes it inconvenient to use and easily reduces the lifting efficiency of the port crane.

[0005] Therefore, a crane hook pulley anti-rope-off device is proposed. Summary of the Invention

[0006] The object of the present invention is to provide a crane hook pulley anti-rope-slip device, which cooperates with the bevel gear ring when the transmission assembly rotates to provide power input for the transmission assembly, thereby controlling the horizontal movement of the buckle assembly along the slide groove, and when the anti-slip strip is in contact with the bent part of the hook body, the buckle assembly is in contact with the concave part of the bent part under the action of elastic force. This solves the problem in the prior art that when port cranes use thicker steel wire ropes, they are easily affected by strong winds, resulting in increased wear of the spring buckle plate, and the need to frequently replace the spring buckle plate, which leads to a decrease in the efficiency of the port crane's container lifting operations. It has the effect of fully ensuring the limiting and anti-slip effect of the thicker steel wire rope, and effectively avoiding the need to frequently replace the spring buckle plate, thereby fully ensuring the efficiency of the port crane's container lifting operations.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A crane hook pulley anti-rope-slip device comprises a side plate, a limit pin, a roller, a hook body, a bevel gear ring, a transmission assembly, an anti-slip strip, a buckle assembly, a fitting block and a strong magnetic block. The hook body is installed between the two side plates, and a connecting column is integrally formed on the top of the hook body. The connecting column is rotationally connected to the side plate. A curved portion is integrally formed on the end of the hook body. The bevel gear ring is installed on the outer periphery of the connecting column. The transmission assembly is rotationally connected to the connecting column, and the transmission assembly is located outside the bevel gear ring. The transmission assembly is connected to the bevel gear ring. The anti-slip strip is connected to the transmission assembly, a sliding groove is provided on the side wall of the anti-slip strip, the buckle head assembly is connected to the transmission assembly, the fitting block is embedded in the top of the anti-slip strip, and the strong magnetic block is installed on the anti-slip strip. When the transmission assembly rotates around the connecting column and the bevel gear ring, the anti-slip strip and the buckle head assembly rotate together. When the transmission assembly rotates counterclockwise, the buckle head assembly is driven to move along the sliding groove toward one side of the transmission assembly, and when the anti-slip strip is fitted with the bent portion, the buckle head assembly is fitted with the strong magnetic block under the action of magnetic force and remains fitted with the bent portion.

[0009] In the above scheme, the anti-slip strip is rotatably connected to the connecting column of the hook body through the transmission assembly, and the bottom of the anti-slip strip is in contact with the hook body, which can reserve enough space for the wire rope on the hook body, thereby facilitating the hanging of thicker wire ropes on the hook body, and when the anti-slip strip is in contact with the hook body, the buckle assembly contacts the bent part of the hook body from the outside, forming a secondary limit reinforcement, thereby fully ensuring the stability of the anti-slip effect of the wire rope, which is beneficial to greatly improve the safety of port cranes when lifting containers. During the rotation of the anti-slip strip, the transmission assembly can accurately control the distance between the buckle assembly and the bent part of the hook body according to the rotation angle of the anti-slip strip to avoid motion interference between the buckle assembly and the bent part.

[0010] Preferably, the diameter of the end portion of the bent portion gradually decreases, and the end portion of the bent portion extends toward a side away from the connecting column.

[0011] Preferably, the transmission assembly includes a lower ring, an upper ring, a conical groove, a fixed cylinder, a transmission rod and a bevel gear. The lower ring and the upper ring are both sleeved on the outer circumference of the connecting column, and the upper ring and the lower ring are fixedly connected by bolts. The conical groove is constructed on the inner circumference of the lower ring, and the conical groove is adapted to the bevel gear ring. The fixed cylinder is installed between the upper ring and the lower ring. The bevel gear is rotatably connected to the fixed cylinder, and the bevel gear is located on the inner side of the upper ring and the lower ring. The bevel gear is meshed with the bevel gear ring, and the transmission rod is connected to the rotating shaft of the bevel gear through a universal coupling.

[0012] Preferably, the outer periphery of the upper ring and the outer periphery of the lower ring are both provided with a semicircular groove, and the radius of the semicircular groove is equal to the radius of the outer periphery of the fixing cylinder.

[0013] Preferably, the edge diameter of the bevel gear is greater than the diameter of the fixed cylinder, and a sealed bearing is installed between the rotating shaft of the bevel gear and the fixed cylinder.

[0014] Preferably, the buckle assembly includes a connector, a threaded rod, a slider, a small magnet, a side plate and a hook strip, the threaded rod is rotatably set in the slide groove, the connector is fixed at the end of the threaded rod, and the connector is connected to the end of the transmission rod, the slider is slidably set in the slide groove, and the slider is threadedly connected to the threaded rod, the small magnet is symmetrically arranged about the threaded rod and embedded in the side wall of the slider, the side plate is installed at the end of the slider, and the hook strip is installed on the outer periphery of the side plate.

[0015] Preferably, the hook strip includes a straight portion, an outward-expanding portion and a fitting portion, the straight portion is connected to the side plate, the outward-expanding portion is integrally formed at the end of the straight portion, and the outward-expanding portion extends away from the slider, the fitting portion is integrally formed at the end of the outward-expanding portion, and the fitting portion is adapted to the curved portion of the hook body.

[0016] Preferably, a limiting block is installed on the top of the sliding block, and the cross-section of the end of the limiting block is constructed in an inverted T shape.

[0017] Preferably, a limiting groove is provided at the bottom of the fitting block, and the limiting groove is adapted to the limiting block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts an anti-slip strip in contact with the upper surface of the hook body, and utilizes a buckle assembly to connect the anti-slip strip and the curved portion of the hook body, thereby performing secondary reinforcement on the anti-slip strip. A larger space is reserved on the hook body for a thicker steel wire rope, thereby preventing the steel wire rope from shaking and rubbing against the anti-slip strip. The structural stability of the anti-slip strip can also be fully guaranteed. Thus, while stabilizing and limiting the thicker steel wire rope to prevent it from slipping off, the need for regular replacement of parts can be avoided, thereby effectively ensuring the efficiency of the port crane during container lifting operations.

[0020] 2. Through the transmission assembly, bevel gear ring and buckle assembly, when the transmission assembly fits the connecting column and rotates, the bevel gear can be driven to rotate under the action of the bevel gear ring, providing power input for the transmission assembly, and then driving the buckle assembly to move horizontally along the slide groove toward the curved part of the hook body. The buckle assembly provides secondary limiting for the anti-slip bar, thereby improving the connection stability between the anti-slip bar and the hook body, greatly improving the safety of the port crane during container lifting operations.

[0021] 3. Through the provided buckle assembly, when the anti-slip bar rotates to fit with the upper surface of the hook body, the slider is just separated from the threaded part of the threaded rod. Then, under the magnetic attraction of the strong magnetic block and the small magnetic block, the slider continues to push toward the end of the slide groove away from the curved part, so that the fitting part of the hook bar is quickly fitted with the curved part. When the subsequent wire rope swings and contacts the anti-slip bar, the wire rope exerts an upward force on the anti-slip bar, and the hook bar is located in the direction of the extension line of the anti-slip bar, and uses the shape of the curved part to limit the upward movement of the anti-slip bar, thereby fully reinforcing the anti-slip bar and greatly improving the safety of the port crane during container lifting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the hook body of the present invention;

[0024] Figure 3 This is a schematic structural diagram of the connecting column and the tapered gear ring of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the transmission assembly of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the transmission rod of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the buckle assembly of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the hook strip of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the slider of the present invention;

[0030] Figure 9 A cross-sectional view of the invented bonding block.

[0031] In the figure: 1. Side panel; 2. Limit pin; 3. Roller; 4. Hook body; 41. Connecting column; 42. Bending part; 5. Bevel gear ring; 6. Transmission assembly; 61. Lower ring; 62. Upper ring; 63. Conical groove; 64. Fixing cylinder; 65. Transmission rod; 66. Bevel gear; 7. Anti-slip strip; 71. Slide groove; 8. Buckle assembly; 81. Connecting head; 82. Threaded rod; 83. Slider; 831. Limit block; 84. Small magnetic block; 85. Side plate; 86. Hook strip; 861. Straight part; 862. Outward expansion part; 863. Fitting part; 9. Fitting block; 91. Limit groove; 10. Strong magnetic block. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 9 The present invention provides a crane hook pulley anti-rope-off device, and the technical solution is as follows:

[0034] Reference Figure 1 and Figure 2, a crane hook pulley anti-rope-slip device includes a side plate 1, a limit pin 2, and a roller 3. The number of side plates 1 is two, and the two side plates 1 are arranged in parallel and side by side. The number of limit pins 2 is the same as that of rollers 3. The limit pin 2 is passed through and installed between the two side plates 1. The roller 3 is installed on the outer periphery of the limit pin 2 through a bearing and is located between the two side plates 1. It also includes a hook body 4, a bevel gear ring 5, a transmission assembly 6, an anti-slip strip 7, a buckle assembly 8, a fitting block 9 and a strong magnetic block 10. The hook body 4 is installed between the two side plates 1. A rotating member that passes through the top of the hook body 4 is fixedly installed between the two side plates 1. The hook body 4 is rotated by the rotating member The hook body 4 is provided with a connecting post 41 on the top of the hook body 4, and the connecting post 41 is connected to the side plate 1 in a limited rotation manner. The connecting post 41 is connected to the side plate 1 in a rotation manner through a rotating member. The end of the hook body 4 is provided with a curved portion 42 on the top of the hook body 4. The curved portion 42 and the connecting post 41 are all formed as one piece with the hook body 4, which can fully ensure the structural strength between the hook body 4, the connecting post 41 and the curved portion 42. The bevel gear ring 5 is installed on the outer periphery of the connecting post 41, and the transmission assembly 6 is connected to the connecting post 41 in rotation. When in use, the transmission assembly 6 can be controlled to rotate in accordance with the outer periphery of the connecting post 41, and the transmission assembly 6 is located outside the bevel gear ring 5. The moving component 6 is connected to the bevel gear ring 5, the anti-slip bar 7 is connected to the transmission component 6, the anti-slip bar 7 is fixedly installed on the outer periphery of the transmission component 6, the side wall of the anti-slip bar 7 is provided with a slide groove 71, the buckle head component 8 is connected to the transmission component 6, and the buckle head component 8 and the transmission component 6 are connected by a universal coupling to achieve the change of transmission direction, the fitting block 9 is embedded in the top of the anti-slip bar 7, the strong magnetic block 10 is installed on the anti-slip bar 7, the surface of the anti-slip bar 7 is provided with a slot, the edge of the slot is flush with the edge of the slide groove 71, the strong magnetic block 10 is installed in the slot, the side wall of the strong magnetic block 10 is located at the end of the slide groove 71, the N pole of the strong magnetic block 10 It is arranged toward one side of the slide groove 71, and when the transmission assembly 6 rotates around the connecting column 41 and the bevel gear ring 5, the anti-slip bar 7 and the buckle head assembly 8 rotate therewith. When the transmission assembly 6 rotates counterclockwise, the buckle head assembly 8 is driven to move along the slide groove 71 toward the side of the transmission assembly 6, and when the anti-slip bar 7 is in contact with the curved portion 42, the buckle head assembly 8 is in contact with the strong magnetic block 10 under the action of magnetic force and remains in contact with the curved portion 42. When the buckle head assembly 8 is in contact with the curved portion 42, the anti-slip bar 7 can be reinforced from the extension line direction of the anti-slip bar 7, and the shape of the curved portion 42 can be used to prevent the anti-slip bar 7 from easily moving upward and deforming when it is subjected to the upward thrust of the thick steel wire rope.

[0035] Reference Figure 2 As an embodiment of the present invention, specifically, the end diameter of the curved portion 42 gradually decreases, and the end of the curved portion 42 extends to the side away from the connecting column 41. When the buckle assembly 8 contacts the curved portion 42, even if the wire rope applies an upward thrust to the anti-slip strip 7 and the buckle assembly 8, the anti-slip strip 7 can be prevented from moving up easily due to the contact between the buckle assembly 8 and the curved portion 42, thereby ensuring the stability of the port crane during container lifting operations.

[0036] Reference Figure 2 、 Figure 4 and Figure 5 , as an embodiment of the present invention, specifically, the transmission assembly 6 includes a lower ring 61, an upper ring 62, a tapered groove 63, a fixing cylinder 64, a transmission rod 65 and a bevel gear 66. The lower ring 61 and the upper ring 62 are both sleeved on the outer circumference of the connecting column 41, and the upper ring 62 and the lower ring 61 are fixedly connected by bolts. The bolts installed between the upper ring 62 and the lower ring 61 are distributed in an annular array about the connecting column 41. The tapered groove 63 is constructed on the inner circumference of the lower ring 61, and the tapered groove 63 is adapted to the bevel gear ring 5. When the upper ring 62 and the lower ring 61 are fitted on the connecting column 41 and rotate, the bevel gear ring 5 is located in the tapered groove 63 and does not directly contact the upper ring 62 and the lower ring 61. The fixing cylinder 64 is installed between the upper ring 62 and the lower ring 61. The bevel gear 66 is rotatably connected to the fixing cylinder 64, and the bevel gear 66 is located on the inner side of the upper ring 62 and the lower ring 61. The bevel gear 66 meshes with the bevel gear ring 5. 2 and the lower ring 61 rotate, the bevel gear 66 produces relative displacement with the upper ring 62 and the lower ring 61 and the bevel gear 66, while the relative position of the bevel gear ring 5 remains unchanged, so the bevel gear 66 will rotate in the corresponding direction, and the transmission rod 65 is connected to the rotating shaft of the bevel gear 66 through the universal joint, and the transmission rod 65 rotates in the same direction as the bevel gear 66 rotates; under the cooperation of the lower ring 61, the upper ring 62, the conical groove 63, the fixing cylinder 64, the transmission rod 65 and the bevel gear 66, the linear movement distance of the buckle head assembly 8 is associated with the relative rotation angle between the transmission assembly 6 and the connecting column 41, so that when the anti-slip bar 7 rotates around the connecting column 41, the relative distance between the buckle head assembly 8 and the bent portion 42 changes stably, thereby avoiding that when the anti-slip bar 7 is rotated into place, the end of the buckle head assembly 8 and the bent portion 42 interfere with each other in movement and cannot be fastened to the outside of the bent portion 42.

[0037] Reference Figure 4 As an embodiment of the present invention, specifically, a semicircular groove is provided on the outer periphery of the upper ring 62 and the outer periphery of the lower ring 61, and the radius of the semicircular groove is equal to the radius of the outer periphery of the fixed cylinder 64. Under the action of the semicircular groove, the fixed cylinder 64 can be conveniently installed tightly between the upper ring 62 and the lower ring 61.

[0038] Reference Figure 5 As an embodiment of the present invention, specifically, the edge diameter of the bevel gear 66 is greater than the diameter of the fixed cylinder 64, and a sealed bearing is installed between the rotating shaft of the bevel gear 66 and the fixed cylinder 64. Under the action of the sealed bearing, external dust can be prevented from entering the inner side of the upper ring 62 and the lower ring 61, thereby fully ensuring the transmission effect between the bevel gear 66 and the bevel gear ring 5. After the bevel gear 66 is placed inside the upper ring 62 and the lower ring 61 and the upper ring 62 and the lower ring 61 are installed and fixed with bolts, the bevel gear 66 will not fall off from the upper ring 62 and the lower ring 61.

[0039] Reference Figure 5 、 Figure 6 and Figure 8 The cam 83 is connected to the end of the slider 84 and the end of the slider 84 is connected to the end of the slider 84. When the slider 83 moves to the end of the threaded rod 82 and just separates from the threaded rod 82, the slider 83 moves to the outside of the connector 81, and at this time the end of the slider 83 is flush with the end of the threaded rod 82. Under the action of the magnetic force, the small magnetic block 84 drives the slider 83 to continue moving a short distance to the side of the strong magnetic block 10, thereby causing the hook strip 86 to move further along the slide groove 71, and when the small magnetic block 84 is in contact with the strong magnetic block 10, the hook strip 86 is just in contact with the curved portion 42.

[0040] Reference Figure 7As an embodiment of the present invention, specifically, the hook strip 86 includes a straight portion 861, an outward expansion portion 862 and a fitting portion 863. The straight portion 861 is connected to the side plate 85, the outward expansion portion 862 is integrally formed at the end of the straight portion 861, and the outward expansion portion 862 extends to the side away from the slider 83, the fitting portion 863 is integrally formed at the end of the outward expansion portion 862, and the fitting portion 863 is adapted to the curved portion 42 of the hook body 4. Since the fitting portion 863 is curved, the end of the fitting portion 863 that is not connected to the outward expansion portion 862 will contact the curved portion 42 before the inner side; the movement state of the hook strip 86 is: it rotates together with the transmission assembly 6 and the anti-slip strip 7, and during the rotation process of the hook strip 86, the transmission assembly 6 provides the hook strip 86 with power input for linear movement, that is, the straight portion 861 rotates along with the anti-slip strip 7, and under the action of the threaded rod 82 and the slider 83 When the slider 83 moves to the end of the threaded rod 82, a certain gap needs to be reserved between the fitting portion 863 and the curved portion 42, which means that when the slider 83 is just separated from the end of the threaded rod 82, the fitting portion 863 is located on the outside of the curved portion 42. Subsequently, under the attraction of the strong magnetic block 10, the small magnetic block 84 drives the slider 83 to continue moving a short distance along the slide groove 71 toward the side of the strong magnetic block 10, and the fitting portion 863 of the slider 83 continues to push toward the side of the curved portion 42, thereby achieving a close fit between the fitting portion 863 and the curved portion 42, thereby strengthening the limiting effect of the anti-slip strip 7.

[0041] Reference Figure 8 and Figure 9 As an embodiment of the present invention, specifically, a limiting block 831 is installed on the top of the slider 83, and the cross-section of the end of the limiting block 831 is constructed in an inverted T shape. A limiting groove 91 is provided at the bottom of the fitting block 9, and the limiting groove 91 is adapted to the limiting block 831. Under the action of the limiting block 831 and the limiting groove 91, the movement trajectory of the limiting block 831 can be further restricted, thereby improving the stability of the limiting block 831 during the movement process.

[0042] Working principle: After the wire rope is hung on the inner side of the hook body 4, pinch the hook body 4 and rotate the transmission assembly 6 horizontally. When the transmission assembly 6 drives the anti-slip strip 7 and the buckle assembly 8 to rotate horizontally toward the curved portion 42, the bevel gear 66 in the transmission assembly 6 is driven to rotate under the action of the bevel gear ring 5, and then the transmission assembly 6 provides power input for the buckle assembly 8, so that the buckle assembly 8 moves along the slide groove 71 to the side close to the curved portion 42. When the anti-slip strip 7 is in contact with the curved portion 42, the hook strip 86 and the slider 83 lose the limiting effect of the threaded rod 82. Under the joint action of the strong magnetic block 10 and the small magnetic block 84, the slider 83 moves further along the slide groove 71 to the side of the strong magnetic block 10 until the hook strip 86 is just in contact with the curved portion 42.

[0043] Specifically, during rotation, the upper ring 62 and the lower ring 61 drive the bevel gear 66 to rotate together. Since the position of the bevel gear ring 5 is relatively fixed, the bevel gear 66 rotates in the corresponding direction during the rotation process while being engaged with the bevel gear ring 5, and then drives the transmission rod 65 to rotate through the universal coupling, and the transmission rod 65 drives the threaded rod 82 to rotate through the connecting head 81. When the threaded rod 82 rotates, the slider 83 threadedly connected to it moves along the slide groove 71 toward the side of the bevel gear 66, and the limit block 831 on the top of the slider 83 moves in contact with the limit groove 91. During the movement of the slider 83, the hook bar 86 is driven to move together;

[0044] When the end of the anti-slip strip 7 is in contact with the upper surface of the curved portion 42, the slider 83 moves to the edge of the threaded rod 82, and the slider 83 loses its connection with the threaded rod 82. At this time, the strong magnetic block 10 attracts the small magnetic block 84 to move toward the side of the strong magnetic block 10 through the magnetic force. The small magnetic block 84 drives the slider 83 to continue a short distance along the slide groove 71 toward the side close to the bevel gear 66, so that the slider 83 moves to the outside of the connector 81. At this time, the hook strip 86 also moves further, and then the outward expansion portion 862 and the contact portion 863 are respectively in contact with the corresponding positions of the curved portion 42;

[0045] When the wire rope needs to be removed, first move the side plate 85 to move the hook strip 86 away from the bevel gear 66. At this time, the strong magnetic block 10 and the small magnetic block 84 are separated by external force. When the slider 83 contacts the end of the threaded rod 82, rotate the upper ring 62 and the lower ring 61 in the opposite direction until the anti-slip strip 7 and the buckle assembly 8 are reset. Then the wire rope can be removed from the hook body 4.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A crane hook pulley anti-rope-off device, comprising a side plate (1), a limit pin (2), and a roller (3), characterized in that: The invention also includes a hook body (4), a conical gear ring (5), a transmission assembly (6), an anti-slip strip (7), a buckle assembly (8), a fitting block (9) and a strong magnetic block (10). The hook body (4) is installed between two side plates (1). A connecting column (41) is integrally formed on the top of the hook body (4). The connecting column (41) is connected to the side plate (1) in a limited rotation manner. A curved portion (42) is integrally formed on the end of the hook body (4). The conical gear ring (5) is installed on the outer periphery of the connecting column (41). The transmission assembly (6) is rotationally connected to the connecting column (41). The transmission assembly (6) is located outside the conical gear ring (5). The transmission assembly (6) is connected to the conical gear ring (5). The anti-slip strip (7) is connected to the transmission assembly ( 6), the side wall of the anti-slip strip (7) is provided with a slide groove (71), the buckle head assembly (8) is connected to the transmission assembly (6), the fitting block (9) is embedded in the top of the anti-slip strip (7), and the strong magnetic block (10) is installed on the anti-slip strip (7). When the transmission assembly (6) rotates around the connecting column (41) and the bevel gear ring (5), the anti-slip strip (7) and the buckle head assembly (8) rotate together. When the transmission assembly (6) rotates counterclockwise, the buckle head assembly (8) is driven to move along the slide groove (71) toward one side of the transmission assembly (6), and when the anti-slip strip (7) is fitted with the curved portion (42), the buckle head assembly (8) is fitted with the strong magnetic block (10) under the action of magnetic force and remains fitted with the curved portion (42).

2. The crane hook pulley anti-rope-off device according to claim 1, characterized in that: The diameter of the end portion of the curved portion (42) gradually decreases, and the end portion of the curved portion (42) extends toward a side away from the connecting column (41).

3. The crane hook pulley anti-rope-off device according to claim 2, characterized in that: The transmission assembly (6) comprises a lower ring (61), an upper ring (62), a conical groove (63), a fixing cylinder (64), a transmission rod (65) and a bevel gear (66). The lower ring (61) and the upper ring (62) are both sleeved on the outer periphery of the connecting column (41), and the upper ring (62) and the lower ring (61) are fixedly connected by bolts. The conical groove (63) is constructed on the inner periphery of the lower ring (61), and the conical groove (63) is adapted to the bevel gear ring (5). The fixing cylinder (64) is installed between the upper ring (62) and the lower ring (61). The bevel gear (66) is rotatably connected to the fixing cylinder (64), and the bevel gear (66) is located on the inner sides of the upper ring (62) and the lower ring (61). The bevel gear (66) is meshed with the bevel gear ring (5). The transmission rod (65) is connected to the rotating shaft of the bevel gear (66) through a universal joint.

4. The crane hook pulley anti-rope-off device according to claim 3, characterized in that: The outer periphery of the upper ring (62) and the outer periphery of the lower ring (61) are both provided with a semicircular groove, and the radius of the semicircular groove is equal to the radius of the outer periphery of the fixed cylinder (64).

5. The crane hook pulley anti-rope-off device according to claim 4, characterized in that: The edge diameter of the bevel gear (66) is greater than the diameter of the fixed cylinder (64), and a sealed bearing is installed between the rotating shaft of the bevel gear (66) and the fixed cylinder (64).

6. The crane hook pulley anti-rope-off device according to claim 2, characterized in that: The buckle assembly (8) includes a connector (81), a threaded rod (82), a slider (83), a small magnetic block (84), a side plate (85) and a hook strip (86). The threaded rod (82) is rotatably arranged in the slide groove (71). The connector (81) is fixed to the end of the threaded rod (82), and the connector (81) is connected to the end of the transmission rod (65). The slider (83) is slidably arranged in the slide groove (71), and the slider (83) is threadedly connected to the threaded rod (82). The small magnetic block (84) is symmetrically arranged with respect to the threaded rod (82) and embedded in the side wall of the slider (83). The side plate (85) is installed at the end of the slider (83), and the hook strip (86) is installed on the outer periphery of the side plate (85).

7. The crane hook pulley anti-rope-off device according to claim 6, characterized in that: The hook strip (86) includes a straight portion (861), an outward-expanding portion (862) and a fitting portion (863); the straight portion (861) is connected to the side plate (85); the outward-expanding portion (862) is integrally formed at the end of the straight portion (861), and the outward-expanding portion (862) extends toward a side away from the slider (83); the fitting portion (863) is integrally formed at the end of the outward-expanding portion (862), and the fitting portion (863) is adapted to the curved portion (42) of the hook body (4).

8. The crane hook pulley anti-rope-off device according to claim 6, characterized in that: A limiting block (831) is installed on the top of the slider (83), and the end section of the limiting block (831) is constructed in an inverted T shape.

9. The crane hook pulley anti-rope-off device according to claim 8, characterized in that: A limiting groove (91) is provided at the bottom of the fitting block (9), and the limiting groove (91) is adapted to the limiting block (831).

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