Anti-swing safety device for a crane

Abstract

The application discloses a kind of crane's sling anti-swing safety device, including installation shell and the outer telescopic sleeve and inner telescopic sleeve assembled on it, and sling is inserted in inner telescopic sleeve;Installation shell is also equipped with transmission assembly, friction damping mechanism and hydraulic damping mechanism.Transmission assembly with outer telescopic sleeve, inner telescopic sleeve keeps transmission connection, so that both always keep reverse motion and have reset function;Friction damping mechanism and hydraulic damping mechanism are all transmission connection with inner telescopic sleeve to exert damping effect.When sling swings and pushes inner telescopic sleeve to slide inwards, transmission assembly drives outer telescopic sleeve to extend outward to limit sling, simultaneously triggers friction damping and hydraulic damping to dissipate swing mechanical energy;Sling restores vertical state after transmission assembly drives telescopic sleeve to reset automatically.The application uses full mechanical linkage structure, without external energy source, can quickly inhibit sling swing, effectively improve the safety and efficiency of crane operation.

Description

Technical Field

[0001] This invention relates to the field of crane safety protection technology, specifically a crane hoisting rope anti-sway safety device. Background Technology

[0002] Cranes, as essential material handling equipment, are widely used in ports, shipbuilding, construction, and manufacturing industries. During actual operation, the lifting ropes and the suspended load are inevitably subject to swaying due to factors such as inertia, wind load, and operational impact. This swaying not only reduces work efficiency and prolongs positioning time but can also lead to serious safety accidents, threatening personnel and equipment.

[0003] Currently, several technical solutions have been proposed to address the issue of anti-swaying of crane lifting ropes. At the control strategy level, load swaying is suppressed by adjusting the trolley speed or the luffing mechanism. For example, an anti-sway controller is designed using a dynamic model to reduce the sway angle of the hook and load. At the mechanical structure level, related technologies include installing anti-sway frames and multi-stage sleeves at the hook, utilizing the sleeves' circumferential limiting effect on the wire rope to restrict the sway amplitude; or using a lifting platform anti-sway device, clamping components, etc., to reduce the rope sway amplitude.

[0004] However, existing technologies still have the following shortcomings: First, active control strategies rely on sensor and actuator responses, which may lead to delays or limited control accuracy under complex working conditions; second, existing mechanical anti-sway devices are mostly passive limiters or unidirectional damping structures, which are difficult to achieve rapid energy dissipation and active reset during the swing of the suspension rope, and have limited suppression effects on continuous or large swings; third, some devices have complex structures, are inconvenient to assemble and maintain, and are prone to wear on the suspension rope, affecting their service life. Summary of the Invention

[0005] In view of the above-mentioned shortcomings in the prior art, the purpose of this invention is to provide a crane suspension rope anti-sway safety device to solve the problem that existing mechanical anti-sway devices are unable to achieve rapid energy dissipation and automatic reset during suspension rope swaying, resulting in poor suppression of continuous swaying and large swaying.

[0006] The technical solution adopted by the present invention to achieve the above objectives is: a crane hoisting rope anti-sway safety device, including a mounting housing and an outer telescopic sleeve and an inner telescopic sleeve assembled on the mounting housing and arranged in a sequential manner from the outside to the inside. The outer telescopic sleeve and the inner telescopic sleeve both slide along the axis of the mounting housing, and the hoisting rope is inserted into the inner telescopic sleeve.

[0007] It also includes a transmission assembly, a friction damping mechanism, and a hydraulic damping mechanism assembled into the mounting housing. The transmission assembly is connected to the outer telescopic sleeve and the inner telescopic sleeve so that the outer telescopic sleeve and the inner telescopic sleeve always move in opposite directions. The transmission assembly is also used to control the reset of the outer telescopic sleeve and the inner telescopic sleeve. The friction damping mechanism and the hydraulic damping mechanism are both connected to the inner telescopic sleeve and are used to apply damping effect to the inner telescopic sleeve.

[0008] Based on the above technical solutions, in order to ensure that all components involved can be stably assembled and operated on the mounting housing, the following technical solutions are provided.

[0009] The mounting housing includes a mounting base and a mounting sleeve that are coaxially fixed together. The friction damping mechanism and the hydraulic damping mechanism are assembled into the mounting base. The inner telescopic sleeve and the outer telescopic sleeve are slidably mounted to the inner and outer sides of the mounting sleeve, respectively. A limit ring seat is provided at the outer end of the outer telescopic sleeve. The limit ring seat is arranged at the outer end of the mounting sleeve and keeps in contact with the outer wall of the inner telescopic sleeve. The transmission assembly is assembled onto the mounting sleeve.

[0010] Based on the above technical solutions, in order to ensure that the inner and outer telescopic sleeves can be stably assembled on the mounting sleeve and to avoid severe wear caused by long-term contact between the ends of the inner and outer telescopic sleeves and the lifting rope, the following technical solutions are provided.

[0011] The inner wall of the outer telescopic sleeve is fixedly connected to a positioning ring seat A, and the outer wall of the inner telescopic sleeve is fixedly connected to a positioning ring seat B. Both the positioning ring seat A and the positioning ring seat B extend to the inner side of the mounting sleeve. The ends of the limiting ring seat and the inner telescopic sleeve are respectively provided with a wear-resistant ring A and a wear-resistant ring B.

[0012] Based on the above technical solutions, in order to ensure that the transmission components can be stably assembled in the mounting sleeve and to achieve transmission combination with the outer telescopic sleeve and the inner telescopic sleeve, the following technical solutions are provided.

[0013] The side wall of the mounting sleeve has multiple sets of radially distributed annular array holes. The transmission assembly includes wedge blocks that are slidably installed in each set of radially distributed holes. Both ends of the wedge blocks are provided with wedge surfaces. The inner wall of the outer telescopic sleeve is provided with a wedge groove A, and the outer wall of the inner telescopic sleeve is provided with a wedge groove B. The wedge surfaces at both ends of the wedge blocks are respectively matched with the wedge groove A and the wedge groove B.

[0014] Based on the above technical solutions, in order to ensure that the inner telescopic sleeve, the outer telescopic sleeve and the lifting rope can automatically reset when separated, that is, the inner telescopic sleeve extends outward and the outer telescopic sleeve retracts inward, the following technical solutions are provided.

[0015] The transmission assembly also includes a support spring A and a support spring B, both of which are assembled into the mounting sleeve. The support spring A abuts against the positioning ring seat A, and the support spring B abuts against the positioning ring seat B.

[0016] Based on the above technical solutions, in order to ensure that the friction damping mechanism can be stably assembled in the mounting base and to provide friction damping for the inner telescopic sleeve during its telescopic movement, the following technical solutions are provided.

[0017] The mounting base has a rotating ring groove and multiple sets of sliding through grooves arranged in an annular array. The friction damping mechanism includes a friction block slidably installed in the sliding through groove and a rotating ring seat rotatably installed in the rotating ring groove. The rotating ring seat maintains a transmission connection with the inner telescopic sleeve and the friction block.

[0018] Based on the above technical solutions, in order to ensure that the rotating ring seat can achieve a transmission connection with the inner telescopic sleeve and drive the rotating ring seat to operate stably when the inner telescopic sleeve moves in and out, the following technical solutions are provided.

[0019] The outer wall of the inner telescopic sleeve is provided with multiple sets of pins arranged in a ring array, and the inner wall of the rotating ring seat is provided with multiple sets of spiral guide grooves arranged in a ring array. The spiral guide grooves are matched with the pins.

[0020] Based on the above technical solutions, in order to ensure that the rotating ring seat can achieve a transmission connection with the friction block and drive the friction block to slide stably in the sliding groove when the rotating ring seat is running, the following technical solutions are provided.

[0021] A radial through groove is provided between the sliding through groove and the rotating ring groove. A slide seat and a pin are fixedly connected to the friction block. The radial through groove and the slide seat maintain a sliding combination. An arc-shaped guide groove is provided on the rotating ring seat to maintain a matching combination with the pin.

[0022] Based on the above technical solutions, in order to ensure that the hydraulic damping mechanism can be stably assembled in the mounting base and provide a damping effect when the inner telescopic sleeve contracts, the following technical solutions are provided.

[0023] The mounting base has an oil reservoir cavity. The hydraulic damping mechanism includes an annular piston seat that is slidably installed in the oil reservoir cavity and a connecting sleeve that is fixedly connected to the annular piston seat. The oil reservoir cavity is filled with hydraulic oil. The annular piston seat is provided with a throttle orifice and a one-way valve. The outer wall of the inner telescopic sleeve is fixedly connected with a pressure ring that is fixedly connected to the connecting sleeve.

[0024] The beneficial effects of this invention are:

[0025] 1. Through the coordinated operation of the outer telescopic sleeve, inner telescopic sleeve, transmission assembly, and damping mechanism, a response can be triggered at the initial stage of rope swaying: when the inner telescopic sleeve contracts inward under the pressure of the rope, the transmission assembly drives the outer telescopic sleeve to extend in the opposite direction, mechanically limiting the rope on the swaying side and forcing the rope's sway amplitude to be controlled; simultaneously, the contraction movement of the inner telescopic sleeve triggers the friction damping mechanism and the hydraulic damping mechanism, applying a double damping effect to the rope and quickly dissipating the swaying mechanical energy. When the rope returns to a vertical state, the transmission assembly drives the inner and outer telescopic sleeves to quickly reset, preparing for the next swaying impact. This process repeats, effectively eliminating rope swaying in a short time, significantly improving the safety of crane operations and the efficiency of lifting and positioning.

[0026] 2. The system employs a purely mechanical structure to sense, limit, and apply damping to the swing state of the suspension rope, eliminating the need for sensors, controllers, and external power sources. The outer and inner telescopic sleeves are linked in opposite directions via wedge blocks and wedge grooves. The friction damping mechanism and hydraulic damping mechanism are directly driven by the telescopic movement of the inner telescopic sleeve. The entire response process is entirely mechanical, avoiding the delays, signal interference, or failure risks that may exist in electronic control systems under complex operating conditions. This results in high reliability, rapid response, and strong environmental adaptability.

[0027] 3. This solution integrates both friction damping and hydraulic damping mechanisms. When the inner telescopic sleeve retracts inward driven by the suspension rope, on the one hand, the rotating ring seat drives the friction block to extend radially and abut against the outer wall of the inner telescopic sleeve, generating friction damping; on the other hand, the pressure ring pushes the annular piston seat to compress the hydraulic oil, forcing the hydraulic oil to flow slowly through the throttling orifice, generating hydraulic damping. The two damping mechanisms work simultaneously, achieving efficient dissipation of the suspension rope's swing energy from different physical levels. Compared to a single damping method, the damping effect is more comprehensive, the adjustment range is wider, and it can adapt to swing conditions with different amplitudes and frequencies.

[0028] 4. In this design, the transmission assembly is equipped with support springs A and B. When the hoisting rope disengages from the telescopic sleeve, the elastic potential energy stored in the springs can quickly drive the inner telescopic sleeve to extend outward and the outer telescopic sleeve to retract inward, completing the reset action. This automatic reset mechanism allows the device to return to its initial standby state without additional operation after each swing impact, enabling continuous response to multiple swing impacts of the hoisting rope. It is particularly suitable for anti-sway requirements of cranes operating under conditions of frequent starts and stops or continuous wind disturbance.

[0029] 5. This solution integrates the friction damping mechanism and hydraulic damping mechanism into the mounting base, and the transmission components into the mounting sleeve. Stable guidance and limiting of the outer and inner telescopic sleeves are achieved through positioning rings A and B. The overall structure is compact and rationally laid out. Furthermore, wear-resistant rings A and B are provided at the ends of the limiting rings and the inner telescopic sleeve. When the hoisting rope swings, it only contacts the wear-resistant rings, effectively avoiding direct wear between the hoisting rope and the telescopic sleeve, extending the service life of the device and the hoisting rope, and reducing maintenance costs. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention when combined with a lifting rope;

[0031] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0032] Figure 3 A schematic diagram of the structure for mounting the housing;

[0033] Figure 4 This is a structural diagram of the outer telescopic sleeve, inner telescopic sleeve, and transmission assembly in their disassembled state.

[0034] Figure 5 This is a schematic diagram of the friction damping mechanism in its disassembled state.

[0035] Figure 6 This is a schematic diagram of the hydraulic damping mechanism in its disassembled state.

[0036] In the diagram: 1. Mounting housing, 11. Mounting base, 111. Rotating ring groove, 112. Sliding through groove, 113. Radial through groove, 114. Oil storage ring cavity, 115. Connecting ring seat, 12. Mounting sleeve, 121. Radial through hole, 2. Outer telescopic sleeve, 21. Limiting ring seat, 22. Positioning ring seat A, 23. Wear-resistant ring A, 24. Wedge groove A, 3. Inner telescopic sleeve, 31. Positioning ring seat B, 32. Wear-resistant ring B, 33. Wedge groove B, 34. Pin head, 35. Pressure ring, 41. Wedge block, 42. Support spring A, 43. Support spring B, 51. Friction block, 511. Slide seat, 512. Pin shaft, 52. Rotating ring seat, 521. Arc guide groove, 522. Spiral guide groove, 61. Annular piston seat, 611. Throttling orifice, 612. One-way valve, 62. Connecting sleeve, 7. Lifting rope. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] Example 1

[0039] Please see Figure 1 , Figure 2A crane hoisting rope anti-sway safety device includes a mounting housing 1 and an outer telescopic sleeve 2 and an inner telescopic sleeve 3 assembled on the mounting housing 1 and arranged in a sequential order from the outside to the inside. The outer telescopic sleeve 2 and the inner telescopic sleeve 3 both slide and extend along the axis of the mounting housing 1, and the hoisting rope 7 is inserted into the inner telescopic sleeve 3.

[0040] It also includes a transmission assembly, a friction damping mechanism, and a hydraulic damping mechanism assembled into the mounting housing 1. The transmission assembly maintains a transmission connection with the outer telescopic sleeve 2 and the inner telescopic sleeve 3 so that the outer telescopic sleeve 2 and the inner telescopic sleeve 3 always maintain opposite movements. The transmission assembly is also used to control the reset of the outer telescopic sleeve 2 and the inner telescopic sleeve 3. The friction damping mechanism and the hydraulic damping mechanism both maintain a transmission connection with the inner telescopic sleeve 3 and are used to apply a damping effect to the inner telescopic sleeve 3.

[0041] The safety device provided in this solution is typically mounted on the movable end of the crane boom, and the released hoisting rope 7 passes through the device to effectively protect the hoisting rope 7 and limit or eliminate the swing amplitude and swing time of the hoisting rope 7.

[0042] The mounting housing 1 ensures the stable installation and operation of the outer telescopic sleeve 2, the inner telescopic sleeve 3, the transmission components, the friction damping mechanism, and the hydraulic damping mechanism. The inner telescopic sleeve 3 is slidably installed on the inner side of the mounting housing 1 and directly faces the hoisting rope 7, while the outer telescopic sleeve 2 is installed on the outer side of the mounting housing 1.

[0043] When the hoisting rope 7 rotates with the boom, its swing amplitude is usually greater than that of the boom due to inertia. When the hoisting rope 7 swings, it can squeeze the outer end of the inner telescopic sleeve 3 and push the inner telescopic sleeve 3 to slide into the mounting housing 1. During this process, the transmission component can push the outer telescopic sleeve 2 to slide to the outer end, so that the outer telescopic sleeve 2 extends and contacts the swinging hoisting rope 7, forcing the hoisting rope 7 to continue to swing to that side, so as to effectively limit the swing amplitude of the hoisting rope 7.

[0044] During the process of the inner telescopic sleeve 3 being driven inward by the suspension rope 7 to retract, the friction damping mechanism and the hydraulic damping mechanism can be triggered simultaneously to provide a damping effect on the retraction motion of the inner telescopic sleeve 3, and then act in the opposite direction on the suspension rope 7 to eliminate the mechanical energy during its swing.

[0045] When the suspension rope 7 swings to a vertical position, the effect on the inner telescopic sleeve 3 is canceled. At this time, the transmission component can force the inner telescopic sleeve 3 and the outer telescopic sleeve 2 to quickly complete the reset in order to cope with the next swing impact of the suspension rope 7. By repeating this principle multiple times, the swing effect of the suspension rope 7 can be quickly eliminated and it can be restored to a vertical position.

[0046] Example 2

[0047] Please see Figure 2 , Figure 3To ensure that all components involved can be stably assembled and operated on the mounting housing 1, the following technical solution is provided.

[0048] The mounting housing 1 includes a mounting base 11 and a mounting sleeve 12 that are coaxially fixed together. A friction damping mechanism and a hydraulic damping mechanism are assembled into the mounting base 11. The inner telescopic sleeve 3 and the outer telescopic sleeve 2 are slidably mounted to the inner and outer sides of the mounting sleeve 12, respectively. A limit ring seat 21 is provided at the outer end of the outer telescopic sleeve 2. The limit ring seat 21 is arranged at the outer end of the mounting sleeve 12 and keeps in contact with the outer wall of the inner telescopic sleeve 3. The transmission component is assembled onto the mounting sleeve 12.

[0049] The end of the mounting base 11 is provided with a connecting ring seat 115 to facilitate the fixing of the entire mounting housing 1 to the crane by bolts. In order to facilitate the effective assembly of the inner telescopic sleeve 3, the outer telescopic sleeve 2, the transmission component, the friction damping mechanism, and the hydraulic damping mechanism on the mounting housing 1, the mounting housing 1 can be designed as a multi-segment assembly structure, and the matching assembly of each component can be achieved by bolts or locking structures.

[0050] The attached diagram only shows the mounting housing 1 as a two-section structure to facilitate the installation of the hydraulic mechanism. In actual production, assembly and application, the mounting housing 1 can be further divided into multiple sections, or the inner telescopic sleeve 3 and the outer telescopic sleeve 2 can be divided into multiple sections to facilitate the stable assembly of the inner telescopic sleeve 3, the outer telescopic sleeve 2, the transmission components and the friction damping mechanism.

[0051] When the outer telescopic sleeve 2 is in the retracted state, the limiting ring seat 21 at the end of the outer telescopic sleeve 2 abuts against the end of the mounting sleeve 12 to achieve precise positioning of the outer telescopic sleeve 2. At the same time, it can also fit against the outer wall of the inner telescopic sleeve 3. When the inner telescopic sleeve 3 retracts and the outer telescopic sleeve 2 extends accordingly, the limiting ring seat 21 at the end of the outer telescopic sleeve 2 can effectively support the swaying rope 7 and limit the swaying rope 7 from continuing to swing significantly.

[0052] To ensure that the inner telescopic sleeve 3 and the outer telescopic sleeve 2 can be stably assembled on the mounting sleeve 12, and to avoid severe wear caused by long-term contact between the ends of the inner telescopic sleeve 3 and the outer telescopic sleeve 2 and the lifting rope 7, the following technical solution is provided.

[0053] The inner wall of the outer telescopic sleeve 2 is fixedly connected to a positioning ring seat A22, and the outer wall of the inner telescopic sleeve 3 is fixedly connected to a positioning ring seat B31. Both positioning ring seat A22 and positioning ring seat B31 extend to the inner side of the mounting sleeve 12. The ends of the limiting ring seat 21 and the inner telescopic sleeve 3 are respectively provided with wear-resistant ring A23 and wear-resistant ring B32.

[0054] The positioning rings A22 and B31 ensure stable assembly of the outer telescopic sleeve 2 and inner telescopic sleeve 3 on the mounting sleeve 12 and achieve stable connection with the transmission components. When the hoisting rope 7 swings, it comes into contact with the wear-resistant rings A23 and B32 on the outer telescopic sleeve 2 and inner telescopic sleeve 3. This wear and consumption of the wear-resistant rings A23 and B32 prevents direct wear on the outer telescopic sleeve 2, inner telescopic sleeve 3, and hoisting rope 7, thus avoiding impact on their service life.

[0055] Example 3

[0056] Please see Figures 2-4 To ensure that the transmission components can be stably assembled in the mounting sleeve 12 and to achieve transmission combination with the outer telescopic sleeve 2 and the inner telescopic sleeve 3, the following technical solution is provided.

[0057] The side wall of the mounting sleeve 12 has multiple sets of radial through holes 121 arranged in an annular array. The transmission component includes a wedge block 41 that is slidably installed in each set of radial through holes 121. Both ends of the wedge block 41 are provided with wedge surfaces. The inner wall of the outer telescopic sleeve 2 is provided with a wedge groove A24, and the outer wall of the inner telescopic sleeve 3 is provided with a wedge groove B33. The wedge surfaces at both ends of the wedge block 41 are matched with the wedge groove A24 and the wedge groove B33 respectively.

[0058] The radial through hole 121 ensures that the wedge block 41 slides stably within it. When the inner telescopic sleeve 3 is squeezed inward by the hoisting rope 7, the wedge block 41 can be driven to slide radially outward through the wedge groove B33 on it. Then, through the cooperation with the wedge groove A24, the outer telescopic sleeve 2 can be driven to extend outward, and the outer telescopic sleeve 2 restricts the further swing of the hoisting rope 7.

[0059] To ensure that the inner telescopic sleeve 3 and the outer telescopic sleeve 2 can automatically reset when separated from the lifting rope 7, that is, the inner telescopic sleeve 3 extends outward and the outer telescopic sleeve 2 retracts inward, the following technical solution is provided.

[0060] The transmission assembly also includes a support spring A42 and a support spring B43. Both support springs A42 and B43 are assembled into the mounting sleeve 12. Support spring A42 abuts against the positioning ring seat A22, and support spring B43 abuts against the positioning ring seat B31.

[0061] During the movement of the suspension rope 7 swinging and causing the inner telescopic sleeve 3 to retract inward and the outer telescopic sleeve 2 to extend outward, the support springs A42 and B43 can be compressed and stored to store elastic potential energy. When the outer telescopic sleeve 2 and the inner telescopic sleeve 3 are no longer in contact with the suspension rope 7, the support springs A42 and B43 can respectively perform a reset action.

[0062] Example 4

[0063] Please see Figure 2 , Figure 3 , Figure 5 To ensure that the friction damping mechanism can be stably assembled in the mounting base 11 and to provide friction damping for the inner telescopic sleeve 3 during its telescopic movement, the following technical solution is provided.

[0064] The mounting base 11 has a rotating ring groove 111 and multiple sets of sliding through grooves 112 arranged in a ring array. The friction damping mechanism includes a friction block 51 slidably installed in the sliding through groove 112 and a rotating ring seat 52 rotatably installed in the rotating ring groove 111. The rotating ring seat 52 maintains a transmission connection with the inner telescopic sleeve 3 and the friction block 51.

[0065] The sliding groove 112 ensures that the friction block 51 slides stably in the radial direction and abuts against the outer wall of the inner telescopic sleeve 3, so as to provide frictional damping for the inner telescopic sleeve 3 during contraction. The rotating ring groove 111 ensures that the rotating ring seat 52 is stably assembled in it. When the inner telescopic sleeve 3 moves in extension and retraction, it can drive the rotating ring seat 52 to rotate accordingly, and then the rotating ring seat 52 drives the friction block 51 to slide in the sliding groove 112.

[0066] To ensure that the rotating ring seat 52 can achieve a transmission connection with the inner telescopic sleeve 3, and to drive the rotating ring seat 52 to operate stably when the inner telescopic sleeve 3 extends and retracts, the following technical solution is provided.

[0067] The outer wall of the inner telescopic sleeve 3 is provided with multiple sets of pins 34 arranged in a ring array, and the inner wall of the rotating ring seat 52 is provided with multiple sets of spiral guide grooves 522 arranged in a ring array. The spiral guide grooves 522 and the pins 34 are matched and combined.

[0068] When the inner telescopic sleeve 3 retracts inward, it can cooperate with the spiral guide groove 522 through the pin head 34 provided on it, drive the rotating ring seat 52 to rotate stably, and then the rotating ring seat 52 drives the friction block 51 to extend stably from the sliding through groove 112 and provide friction damping effect for the inner telescopic sleeve 3.

[0069] To ensure that the rotating ring seat 52 can achieve a transmission connection with the friction block 51, and to drive the friction block 51 to slide stably in the sliding groove 112 when the rotating ring seat 52 is running, the following technical solution is provided.

[0070] A radial through groove 113 is provided between the sliding through groove 112 and the rotating ring groove 111. A sliding seat 511 and a pin 512 arranged coaxially are fixed on the friction block 51. The radial through groove 113 and the sliding seat 511 maintain a sliding combination. An arc-shaped guide groove 521 is provided on the rotating ring seat 52 to maintain a matching combination with the pin 512.

[0071] The cooperation between the radial through groove 113 and the slide block 511 ensures that the friction block 51 slides stably along the radial direction of the mounting base 11. When the rotating ring seat 52 is driven by the inner telescopic sleeve 3, it cooperates with the pin 512 through the arc-shaped guide groove 521 provided on it to drive the friction block 51 to move radially, so that the friction block 51 moves toward the inner telescopic sleeve 3 and generates friction, and the friction block 51 provides friction damping to the inner telescopic sleeve 3.

[0072] When the inner telescopic sleeve 3 is driven to extend outward and reset by the support spring B43, the friction block 51 can be driven to retract into the sliding through groove 112 and cancel its engagement with the inner telescopic sleeve 3 through the cooperation of the pin head 34 with the spiral guide groove 522 and the cooperation of the arc guide groove 521 with the pin shaft 512.

[0073] Example 5

[0074] Please see Figure 2 , Figure 3 , Figure 6 To ensure that the hydraulic damping mechanism can be stably assembled in the mounting base 11 and to provide a damping effect when the inner telescopic sleeve 3 retracts, the following technical solution is provided.

[0075] The mounting base 11 has an oil storage ring cavity 114. The hydraulic damping mechanism includes an annular piston seat 61 slidably installed in the oil storage ring cavity 114 and a connecting sleeve 62 fixedly connected to the annular piston seat 61. The oil storage ring cavity 114 is filled with hydraulic oil. The annular piston seat 61 is provided with a throttle hole 611 and a one-way valve 612. The outer wall of the inner telescopic sleeve 3 is fixedly connected with a pressure ring 35 that is fixedly connected to the connecting sleeve 62.

[0076] The one-way valve 612 is used to control the unidirectional flow of hydraulic oil below the annular piston seat 61 to above the annular piston seat 61. When the inner telescopic sleeve 3 retracts inward, it can push the connecting sleeve 62 and the annular piston seat 61 upward through its upper pressure ring 35, thereby forcing the hydraulic oil above it to flow slowly downward through the throttle orifice 611. The one-way valve 612 cannot transmit hydraulic oil normally. Due to the flow restriction effect of the throttle orifice 611, the hydraulic oil can apply a damping effect to the inner telescopic sleeve 3.

[0077] When the inner telescopic sleeve 3 extends and resets, it drives the connecting sleeve 62 and the reversing piston seat to move synchronously. At this time, the throttle orifice 611 and the one-way valve 612 can transmit hydraulic oil, thereby making the hydraulic oil flow from the bottom of the reversing piston seat upward, so as to realize the rapid reset of the hydraulic oil.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A safety device for preventing the swaying of a crane's lifting rope, characterized in that, Includes a mounting housing (1) and an outer telescopic sleeve (2) and an inner telescopic sleeve (3) assembled onto the mounting housing (1) and arranged in a sequential order from the outside to the inside. The outer telescopic sleeve (2) and the inner telescopic sleeve (3) slide along the axis of the mounting housing (1), and the suspension rope (7) is inserted into the inner telescopic sleeve (3). It also includes a transmission assembly, a friction damping mechanism, and a hydraulic damping mechanism assembled into the mounting housing (1). The transmission assembly is connected to the outer telescopic sleeve (2) and the inner telescopic sleeve (3) so that the outer telescopic sleeve (2) and the inner telescopic sleeve (3) always move in opposite directions. The transmission assembly is also used to control the reset of the outer telescopic sleeve (2) and the inner telescopic sleeve (3). The friction damping mechanism and the hydraulic damping mechanism are both connected to the inner telescopic sleeve (3) and are used to apply damping to the inner telescopic sleeve (3).

2. The anti-sway safety device for the hoisting rope of a crane according to claim 1, characterized in that: The mounting housing (1) includes a mounting base (11) and a mounting sleeve (12) that are coaxially fixed together. The friction damping mechanism and the hydraulic damping mechanism are assembled into the mounting base (11). The inner telescopic sleeve (3) and the outer telescopic sleeve (2) are slidably mounted on the inner and outer sides of the mounting sleeve (12). A limiting ring seat (21) is provided at the outer end of the outer telescopic sleeve (2). The limiting ring seat (21) is arranged at the outer end of the mounting sleeve (12) and is in close contact with the outer wall of the inner telescopic sleeve (3). The transmission component is assembled onto the mounting sleeve (12).

3. The anti-sway safety device for the hoisting rope of a crane according to claim 2, characterized in that: The inner wall of the outer telescopic sleeve (2) is fixedly connected to a positioning ring seat A (22), and the outer wall of the inner telescopic sleeve (3) is fixedly connected to a positioning ring seat B (31). The positioning ring seat A (22) and the positioning ring seat B (31) both extend to the inner side of the mounting sleeve (12). The ends of the limiting ring seat (21) and the inner telescopic sleeve (3) are respectively provided with wear-resistant ring A (23) and wear-resistant ring B (32).

4. A crane suspension rope anti-sway safety device according to claim 3, characterized in that: The side wall of the mounting sleeve (12) has multiple sets of radial through holes (121) arranged in an annular array. The transmission component includes a wedge block (41) that is slidably installed in each set of radial through holes (121). Both ends of the wedge block (41) are provided with wedge surfaces. The inner wall of the outer telescopic sleeve (2) is provided with a wedge groove A (24), and the outer wall of the inner telescopic sleeve (3) is provided with a wedge groove B (33). The wedge surfaces at both ends of the wedge block (41) are respectively matched with the wedge groove A (24) and the wedge groove B (33).

5. A crane suspension rope anti-sway safety device according to claim 4, characterized in that: The transmission assembly also includes a support spring A (42) and a support spring B (43). The support spring A (42) and the support spring B (43) are both assembled into the mounting sleeve (12). The support spring A (42) abuts against the positioning ring seat A (22), and the support spring B (43) abuts against the positioning ring seat B (31).

6. A crane suspension rope anti-sway safety device according to claim 2, characterized in that: The mounting base (11) is provided with a rotating ring groove (111) and multiple sets of sliding through grooves (112) arranged in a ring array. The friction damping mechanism includes a friction block (51) slidably installed in the sliding through groove (112) and a rotating ring seat (52) rotatably installed in the rotating ring groove (111). The rotating ring seat (52) maintains a transmission connection with the inner telescopic sleeve (3) and the friction block (51).

7. A crane suspension rope anti-sway safety device according to claim 6, characterized in that: The outer wall of the inner telescopic sleeve (3) is provided with multiple sets of pins (34) arranged in a ring array, and the inner wall of the rotating ring seat (52) is provided with multiple sets of spiral guide grooves (522) arranged in a ring array. The spiral guide grooves (522) and the pins (34) are matched and combined.

8. A crane suspension rope anti-sway safety device according to claim 7, characterized in that: A radial through groove (113) is provided between the sliding through groove (112) and the rotating ring groove (111). A slide (511) and a pin (512) are fixedly connected to the friction block (51). The radial through groove (113) and the slide (511) maintain a sliding combination. An arc-shaped guide groove (521) is provided on the rotating ring (52) to maintain a matching combination with the pin (512).

9. A crane suspension rope anti-sway safety device according to claim 2, characterized in that: The mounting base (11) has an oil storage ring cavity (114). The hydraulic damping mechanism includes an annular piston seat (61) slidably installed in the oil storage ring cavity (114) and a connecting sleeve (62) fixedly connected to the annular piston seat (61). The oil storage ring cavity (114) is filled with hydraulic oil. The annular piston seat (61) is provided with a throttle hole (611) and a one-way valve (612). The outer wall of the inner telescopic sleeve (3) is fixedly connected with a pressure ring (35) that is fixedly connected to the connecting sleeve (62).

Images