Lifting protection device and method thereof

Abstract

The invention discloses a hoisting protection device and method, and belongs to the field of hoisting equipment, the hoisting protection device comprises a shell, and a rope assembly, a tension adjusting mechanism and a speed control mechanism are arranged in the shell; the rope assembly comprises at least two groups of independently arranged rope transmission units, and each group of rope transmission unit comprises a traction module, a lead-in module and a storage module which are connected in sequence; the tension adjusting mechanism comprises tension adjusting assemblies arranged between the traction module and the leading-in module and between the leading-in module and the storage module. The speed control mechanism comprises a driving part, a clutch assembly and a transmission connecting rod assembly, the power output end of the traction module and / or the storage module is sleeved with the clutch assembly, and the transmission connecting rod assembly is used for being connected with the driving part and the clutch assembly so as to adjust the clutch state of the clutch assembly. Through the synergistic effect of the multiple sets of independent rope transmission units and the tension-speed double-adjusting mechanism, the bearing redundancy is improved, and meanwhile dynamic load balance is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of lifting equipment. Specifically, it relates to a lifting protection device, and also provides a lifting protection method for the lifting protection device. Background Art

[0002] In the field of lifting equipment, the safety, stability, and controllability of lifting devices are core technical difficulties. Existing lifting equipment usually adopts a single-rope drive structure and lacks a redundant protection mechanism. Once the load-bearing rope breaks or the tension gets out of control, it is extremely easy to cause a falling accident. During the installation of cable poles, it is necessary to lift cables, insulator strings, and other appliances that need to be installed at the upper end of the cable pole above the cable pole. Currently, the existing lifting method generally uses a telescopic ladder truck, but the lifting height of the telescopic ladder truck is limited, and it must also rely on the cable pole. To ensure the lifting height, a fixed pulley is currently installed at the top of the cable pole, and the cable of the winch passes through the fixed pulley to lift and lower the heavy object. However, once the winch has a problem or the cable breaks, it will cause danger. Moreover, if the winch is used for a long time, wear will occur. If the wear is serious, the cable will also slip off and the heavy object will fall off, resulting in safety problems. In addition, the tension adjustment and speed control functions of traditional lifting devices are independent of each other and cannot achieve dynamic coordinated response.

[0003] For example, the Chinese patent with the publication number CN211141329U discloses a lifting mechanical wire rope operation protection device, including a trolley end beam, an electrical control cabinet, a hoist protection mechanism, a hoist, a hoist mounting seat, a wire rope detection mechanism, a wire rope, a pulley block, a weight mechanism, and a hook. Through the settings such as the wire rope detection mechanism, it avoids the situation where the wire rope breaks without notice, but it still cannot solve the tension adjustment and speed control during hoisting.

[0004] In view of this, the present application is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a lifting protection device. The present invention is realized through the following technical solutions:

[0006] A lifting protection device includes a housing, and a rope assembly, a tension adjustment mechanism, and a speed control mechanism are arranged inside the housing;

[0007] The rope assembly includes at least two groups of independently arranged rope drive units, and each group of the rope drive units includes a traction module, a guiding module, and a receiving module that are connected in sequence;

[0008] The tension adjustment mechanism includes tension adjustment components arranged between the traction module and the guiding module, and between the guiding module and the receiving module;

[0009] The speed control mechanism includes a driving member, a clutch assembly, and a transmission link assembly. The clutch assembly is sleeved on the power output end of the traction module and / or the storage module, and the transmission link assembly is used to connect the driving member and the clutch assembly to adjust the clutch state of the clutch assembly.

[0010] Preferably, the rope assembly includes a load-bearing rope assembly and a safety rope assembly. The traction module of the load-bearing rope assembly includes a load-bearing traction wheel and a load-bearing driving motor, and the traction module of the safety rope assembly includes a safety rope traction wheel;

[0011] The load-bearing traction wheel and the safety rope traction wheel are coaxially arranged, and a pressing wheel is provided below the load-bearing traction wheel and the safety rope traction wheel. The load-bearing traction wheel is driven by the load-bearing driving motor.

[0012] Preferably, the guiding module includes a guiding wheel set with a locking mechanism. The guiding wheel set includes an upper wheel and a lower wheel arranged up and down, and the locking mechanism is used to lock the guiding wheel set when the rope breaks.

[0013] Preferably, the storage module includes a storage wheel. One end of the rope of the rope assembly is wound around the storage wheel, and the other end passes through the guiding module and is led out from the traction module.

[0014] Preferably, the tension adjusting assembly includes a tensioning wheel and a tensioning wheel traction frame, and the tensioning wheel traction frame slides up and down along the side wall of the housing;

[0015] A limit control member is provided above the tensioning wheel traction frame, and the end of the tensioning wheel traction frame is slidably arranged in the limit interval of the limit control member.

[0016] Preferably, the tension adjusting mechanism further includes a tension holding member provided between the storage module and the tension adjusting assembly.

[0017] Preferably, at least two groups of the clutch assemblies are symmetrically arranged along the central plane of the load-bearing rope assembly and the safety rope assembly;

[0018] The clutch assembly includes an inclined plane clutch and an elastic member. The inclined plane clutch is sleeved on the outer side of the wheel body of the traction module or the storage module, and the elastic member is arranged between the inclined plane clutch and the wheel body.

[0019] Preferably, the transmission link assembly includes a transmission shaft. The power output end of the storage module is a storage motor. The transmission shaft is connected to the power output end of the storage module. The driving member is fixedly connected to the transmission shaft, and wheel bodies are arranged on both sides of the driving member. The wheel bodies are slidably sleeved on the transmission shaft;

[0020] The transmission link assembly further includes a toggle arm and a driving arm. The toggle arm is connected to the clutch disc of the inclined plane clutch. One end of the driving arm is hinged to the toggle arm, and the other end is connected to the driving member;

[0021] The driving member drives the toggle arm to rotate through the driving arm to adjust the tightness of the elastic member.

[0022] The present invention also provides a lifting protection method, which is applied to a lifting protection device as described above, and includes the following steps:

[0023] S1. Connect the ropes of each of the rope assemblies to the device to be lifted respectively;

[0024] S2. During lifting, control the load-bearing drive motor and the storage motor to rotate forward to drive the ropes to wind around the storage module;

[0025] S3. During release, control the load-bearing drive motor and the storage motor to rotate in reverse to drive the ropes to be released from the storage module;

[0026] S4. Real-time monitor and adjust the rope tension through the tension adjustment mechanism. When the tension exceeds the threshold value, the limit control member is triggered;

[0027] S5. The limit control member controls the speed control mechanism to adjust the action of the inclined plane clutch, and controls the speed of the storage rope and / or the traction rope to ensure a stable lifting process;

[0028] S6. When any rope breaks, the locking mechanism of the guiding module is triggered to lock, realizing safety protection.

[0029] Preferably, in the step S4, the displacement change of the tension pulley drives the tension pulley traction frame to trigger the limit switch to adjust the tightness state of the rope;

[0030] And / or, in the step S5, the driving member adjusts the compression amount of the elastic member between the inclined plane clutch and the wheel body through the transmission link assembly to change the pressing force of the wheel body pressing against the driving member side, and controls the rotation speed of the wheel body.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. Through the synergistic effect of multiple independent rope transmission units and the tension-speed dual adjustment mechanism, while improving the load-bearing redundancy, dynamic load balance is achieved.

[0033] 2. The load-bearing traction wheel and the safety rope traction wheel are arranged coaxially to ensure the synchronization of double rope movement and avoid device tilting or rope wear due to uneven force. The lower clamping wheel presses the traction wheel elastically to increase the friction between the rope and the wheel body to prevent slipping. It is especially suitable for stable lifting under heavy load scenarios. The load-bearing drive motor controls the traction of the load-bearing rope independently and can dynamically adjust the driving force according to the actual load. The safety rope traction wheel follows the load-bearing traction wheel, simplifying the transmission structure while ensuring the passive protection function of the safety rope.

[0034] 3. The tension wheel moves up and down with the rope tension, and the displacement of the tension wheel traction frame directly reflects the tension change. The limit control component (such as the limit switch) can accurately trigger the threshold alarm or control action. The sliding tension wheel traction frame can automatically adjust the tension according to the rope tension without manual intervention. It is suitable for dynamic load scenarios. The design of the limit range enables the system to intervene in advance (such as deceleration, alarm) when the tension approaches the dangerous threshold, avoiding direct triggering of the break protection and improving the continuity of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the speed control mechanism of the present invention.

[0037] In the figure: 1. load-bearing rope assembly; 2. safety rope assembly; 3. load-bearing traction wheel; 4. guide wheel group; 5. storage wheel; 6. traction module; 7. introduction module; 8. storage module; 9. clamping wheel; 10. load-bearing drive motor; 11. tensioning wheel; 12. tensioning wheel traction frame; 13. limit control part; 14. tension maintaining part; 15. speed control mechanism; 16. drive plate; 17. inclined clutch; 18. elastic part; 19. toggle arm; 20. drive arm; 21. drive part; 22. storage motor; 23. shell. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Embodiment 1

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a lifting protection device, including a housing 23, wherein a rope assembly, a tension adjustment mechanism and a speed control mechanism 15 are arranged in the housing 23;

[0041] The rope assembly includes at least two groups of independently arranged rope transmission units, each group of the rope transmission units includes a traction module 6, an introduction module 7 and a storage module 8 connected in sequence;

[0042] The tension adjustment mechanism includes tension adjustment components provided between the traction module 6 and the introduction module 7, and between the introduction module 7 and the storage module 8;

[0043] The speed control mechanism 15 includes a driving member 21, a clutch assembly, and a transmission link assembly. The clutch assembly is sleeved on the power output end of the traction module 6 and / or the storage module 8, and the transmission link assembly is used to connect the driving member 21 and the clutch assembly to adjust the clutch state of the clutch assembly.

[0044] The coordinated action of multiple independent rope transmission units and the tension-speed dual adjustment mechanism realizes dynamic load balance while increasing the load-bearing redundancy. At least two rope transmission units (such as a load-bearing rope and a safety rope) achieve double protection of "main load-bearing + safety redundancy". When a single rope fails, the safety state can still be maintained through the other group. The tension adjustment component is provided between the traction module 6 and the introduction module 7, and between the introduction module 7 and the storage module 8, and can real-time monitor the rope tension during the entire lifting process (traction, introduction, storage), avoiding rope breakage or device shaking caused by sudden changes in tension. The linkage design of the clutch assembly and the transmission link assembly can real-time adjust the rotational speed of the wheel body through the driving member 21 to adapt to the lifting speed requirements under different loads, and can also reduce the start-stop impact and improve the operation stability.

[0045] Furthermore, a speed control mechanism 15 is respectively provided on each of the traction module 6, the introduction module 7, and the storage module 8.

[0046] The rope assembly includes a load-bearing rope assembly 1 and a safety rope assembly 2. The traction module 6 of the load-bearing rope assembly 1 includes a load-bearing traction wheel 3 and a load-bearing driving motor 10. The traction module 6 of the safety rope assembly 2 includes a safety rope traction wheel;

[0047] The load-bearing traction wheel 3 and the safety rope traction wheel are coaxially arranged. A pressing wheel 9 is provided below the load-bearing traction wheel 3 and the safety rope traction wheel. The load-bearing traction wheel 3 is driven by the load-bearing driving motor 10. The coaxial arrangement of the load-bearing traction wheel 3 and the safety rope traction wheel ensures the synchronous movement of the two ropes, avoiding device tilt or rope wear caused by uneven force. The pressing wheel 9 below elastically presses the traction wheel, increasing the friction between the rope and the wheel body to prevent slipping, especially suitable for stable lifting in heavy-load scenarios. The load-bearing driving motor 10 independently controls the traction of the load-bearing rope and can dynamically adjust the driving force according to the actual load. The safety rope traction wheel follows the load-bearing traction wheel 3, simplifying the transmission structure while ensuring the passive protection function of the safety rope.

[0048] Preferably, the import module 7 includes a guide wheel set 4 with a locking mechanism. The guide wheel set 4 includes an upper wheel and a lower wheel arranged vertically. The locking mechanism is used to lock the guide wheel set 4 when the rope breaks. The locking mechanism of the guide wheel set 4 (such as a non-rotating lock) immediately locks the wheel body when the rope breaks, preventing the safety rope or load-bearing rope from sliding, minimizing the risk of falling. The guide wheel set 4 arranged vertically forms a "rope channel". The locking mechanism is integrated inside the wheel set, without the need for additional space, and is suitable for miniaturized lifting equipment. Combined with the double-rope design, when the load-bearing rope breaks, the safety rope independently bears the load through the locked guide wheel set 4, providing a buffer time for emergency handling.

[0049] Specifically, a speed control mechanism 15 can be installed on the upper wheel or the lower wheel of the import module 7. The upper wheel and the lower wheel of the guide wheel set 4 of the import module 7 are both provided with non-rotating locks (such as mechanisms like ratchet and pawl structures). When the load-bearing rope breaks, the rope tension drops suddenly, triggering the mechanical linkage device of the non-rotating lock, causing the pawl to engage with the ratchet tooth groove, locking the guide wheel set 4, and preventing the load from sliding down quickly. (The winding technology and locking technology used in the import module 7 are publicly known technologies in this field and will not be elaborated here.)

[0050] Preferably, the storage module 8 includes a storage wheel 5. One end of the rope of the rope assembly is wound around the storage wheel 5, and the other end passes through the import module 7 and is led out from the self-traction module 6.

[0051] One end of the rope is wound around the storage wheel 5, and the other end is led out through the import module 7 and the traction module 6, forming a complete path of "winding - guiding - traction", avoiding rope entanglement. The load-bearing rope and the safety rope are respectively stored on independent storage wheels 5, and one set of ropes can be replaced or maintained separately, reducing the maintenance cost. The rope enters the traction module 6 after passing through the guide wheel set 4 of the import module 7, reducing the bending stress of the rope at the turning point and extending the service life.

[0052] Preferably, the tension adjustment assembly includes a tensioning wheel 11 and a tensioning wheel traction frame. The tensioning wheel traction frame slides up and down along the side wall of the housing 23;

[0053] A limit control member 13 is provided above the tensioning wheel traction frame. The end of the tensioning wheel traction frame is slidably arranged in the limit interval of the limit control member 13.

[0054] The tensioning pulley 11 moves up and down with the rope tension, and the displacement of the tensioning pulley traction frame intuitively reflects the tension change. The limit control member 13 (such as a limit switch) can accurately trigger the threshold alarm or control action. The sliding tensioning pulley traction frame can automatically adjust the tension degree according to the rope tension without manual intervention, and is applicable to dynamic load scenarios (such as load changes during hoisting). The design of the limit interval enables the system to intervene in advance (such as decelerating, alarming) when the tension approaches the dangerous threshold, avoiding directly triggering the fracture protection and improving the operation continuity.

[0055] Further preferably, the tension adjusting mechanism further includes a tension maintaining member 14 disposed between the storage module 8 and the tension adjusting assembly.

[0056] The tension maintaining member 14 (such as a holding pulley) is disposed between the storage module 8 and the tension adjusting assembly, and can stabilize the rope tension during the storage process, preventing local relaxation or over-tightening caused by uneven winding of the storage pulley 5. (Located in the traction / introduction section) and the holding pulley (located in the storage section) realize the sectional control of the tension along the entire hoisting path, improve the system robustness. The stable tension environment can reduce the fatigue damage of the rope caused by frequent tensioning and relaxation, and is especially applicable to high-frequency hoisting operation scenarios.

[0057] Preferably, at least two sets of the clutch assemblies are symmetrically arranged along the central plane of the load-bearing rope assembly 1 and the safety rope assembly 2;

[0058] The clutch assembly includes an inclined plane clutch 17 and an elastic member 18. The inclined plane clutch 17 is sleeved outside the wheel body of the traction module 6 or the storage module 8, and the elastic member 18 is disposed between the inclined plane clutch 17 and the wheel body.

[0059] The combination of the inclined plane clutch 17 and the elastic member 18 (such as a spring) adjusts the wheel body speed through friction, which is softer than the traditional gear speed regulation, can realize continuous change of the speed, and avoid rigid impact. When the load exceeds the preset pressure of the elastic member 18, the clutch assembly is directly sleeved outside the wheel body, without complex transmission components, and is convenient for installation and maintenance, and is suitable for hoisting equipment with limited space.

[0060] Further, the transmission link assembly includes a transmission shaft. The power output end of the storage module 8 is a storage motor 22. The transmission shaft is connected to the power output end of the storage module 8. The driving member 21 is fixedly connected to the transmission shaft. Wheel bodies are arranged on both sides of the driving member 21, and the wheel bodies are slidably sleeved on the transmission shaft;

[0061] The transmission link assembly further includes a toggle arm 19 and a driving arm 20. The toggle arm 19 is connected to the clutch plate of the inclined plane clutch 17. One end of the driving arm 20 is hinged to the toggle arm 19, and the other end is connected to the driving member 21;

[0062] The driving member 21 drives the toggle arm 19 to rotate through the driving arm 20, so as to adjust the tightness of the elastic member 18.

[0063] The transmission shaft connects the storage motor 22 and the driving member 21 to ensure the synchronism of power transmission. The wheel bodies on both sides of the driving member 21 are slidably sleeved on the transmission shaft. The compression amount of the elastic member 18 can be adjusted to change the pressing force between the wheel body and the driving member 21, so as to realize the linear adjustment of the rotation speed. The hinged structure of the toggle arm 19 and the driving arm 20 forms a lever amplification effect. A small displacement of the driver (such as an electric push rod) can quickly adjust the state of the inclined plane clutch 17 through the transmission link assembly to meet the real-time control requirements. The rotation speeds of the traction module 6 (such as the load-bearing traction wheel 3) and the storage module 8 (such as the storage wheel 5) can be adjusted simultaneously to adapt to the different speed regulation requirements in the hoisting (mainly the traction wheel) and releasing (mainly the storage wheel 5) stages.

[0064] Specifically, on the traction module 6, the guiding module 7 and the storage module 8, two groups of the clutch assemblies are symmetrically arranged along the central plane of the load-bearing rope assembly 1 and the safety rope assembly 2. If the guiding module 7 is provided, there are a total of six groups, and if the guiding module 7 is not provided, there are four groups.

[0065] When the tensioning wheel 11 moves upward due to excessive rope tension, the tensioning wheel traction frame triggers the limit switch. The control system commands the driver to start. The driving arm 20 is used to push the toggle arm 19, so that the clutch plate of the inclined plane clutch 17 does not overly press the wheel 9 body, reducing the friction force to lower the rotation speed of the traction wheel or the storage wheel 5 and avoiding rope overload. On the contrary, the clutch plate of the inclined plane clutch 17 presses the wheel 9 body, increasing the friction force to increase the rotation speed of the traction wheel or the storage wheel 5.

[0066] Embodiment 2

[0067] This embodiment provides a hoisting protection method, which is applied to a hoisting protection device as described in Embodiment 1, and includes the following steps:

[0068] S1. Connect the ropes of each of the rope assemblies to the device to be hoisted respectively;

[0069] S2. When hoisting, control the load-bearing driving motor 10 and the storage motor 22 to rotate forward, and drive the ropes to wind around the storage module 8;

[0070] S3. When releasing, control the load-bearing driving motor 10 and the storage motor 22 to rotate in reverse, and drive the ropes to be released from the storage module 8;

[0071] S4. The rope tension is monitored and adjusted in real time through the tension adjusting mechanism. When the tension exceeds the threshold value, the limit control member 13 is triggered;

[0072] S5. The limit control member 13 controls the speed control mechanism 15 to adjust the operation of the inclined plane clutch 17, and controls the speed of the storage rope and / or the towing rope to ensure a stable lifting process.

[0073] S6. When any rope breaks, the locking mechanism of the guiding module 7 is triggered to lock, achieving safety protection.

[0074] The automatic linkage between the limit control member 13 and the speed control mechanism 15 reduces manual intervention and the risk of operation errors, and is applicable to the automated lifting scenario.

[0075] The mechanism that the displacement of the tensioning pulley 11 triggers the limit switch can improve the tension control accuracy to the millimeter level, ensuring that the rope tension is always maintained within the safe range.

[0076] The linear relationship between the compression amount of the elastic member 18 and the rotational speed of the wheel body enables the speed regulation accuracy to reach ±5%, meeting the requirements of precision lifting operations.

[0077] Preferably, in step S4, the displacement change of the tensioning pulley 11 drives the tensioning pulley traction frame to trigger the limit switch, so as to adjust the tightness state of the rope.

[0078] And / or, in step S5, the driving member 21 adjusts the compression amount of the elastic member 18 between the inclined plane clutch 17 and the wheel body through the transmission link assembly, so as to change the pressing force of the wheel body pressing against one side of the driving member 21 and control the rotational speed of the wheel body.

[0079] The rotational speed can be adjusted according to the actual working conditions to change the tension, improving the adaptability of the system.

[0080] The combination of mechanical linkage (transmission link assembly) and electrical control (limit switch) enables overload slip protection to be achieved through the mechanical structure even in case of electrical system failure, improving the reliability.

Claims

1. A lifting protection device, characterized in that, It includes a housing (23), and a rope assembly, a tension adjusting mechanism and a speed control mechanism (15) are arranged inside the housing (23); The rope assembly includes at least two groups of independently arranged rope transmission units, and each group of the rope transmission units includes a traction module (6), a guiding module (7) and a storage module (8) connected in sequence; The tension adjusting mechanism includes tension adjusting components arranged between the traction module (6) and the guiding module (7), and between the guiding module (7) and the storage module (8); The speed control mechanism (15) includes a driving member (21), a clutch assembly and a transmission link assembly. The clutch assembly is sleeved on the power output end of the traction module (6) and / or the storage module (8), and the transmission link assembly is used to connect the driving member (21) and the clutch assembly to adjust the clutch state of the clutch assembly.

2. The lifting protection device according to claim 1, characterized in that: The rope assembly includes a load-bearing rope assembly (1) and a safety rope assembly (2). The traction module (6) of the load-bearing rope assembly (1) includes a load-bearing traction wheel (3) and a load-bearing driving motor (10), and the traction module (6) of the safety rope assembly (2) includes a safety rope traction wheel; The load-bearing traction wheel (3) and the safety rope traction wheel are coaxially arranged, and a pressing wheel (9) is arranged below the load-bearing traction wheel (3) and the safety rope traction wheel. The load-bearing traction wheel (3) is driven by the load-bearing driving motor (10).

3. The lifting protection device according to claim 1, characterized in that: The guiding module (7) includes a guiding wheel set (4) with a locking mechanism. The guiding wheel set (4) includes an upper wheel and a lower wheel arranged up and down, and the locking mechanism is used to lock the guiding wheel set (4) when the rope breaks.

4. A lifting protection device according to claim 1, characterized in that: The storage module (8) includes a storage wheel (5). One end of the rope of the rope assembly is wound around the storage wheel (5), and the other end passes through the guiding module (7) and is led out from the traction module (6).

5. A lifting protection device according to any one of claims 1-4, characterized in that: The tension adjusting component includes a tensioning wheel (11) and a tensioning wheel traction frame, and the tensioning wheel traction frame slides up and down along the side wall of the housing (23); A limit control member (13) is arranged above the tensioning wheel traction frame, and the end of the tensioning wheel traction frame slides in the limit interval of the limit control member (13).

6. The lifting protection device according to claim 5, characterized in that: The tension adjusting mechanism further includes a tension maintaining member (14) arranged between the storage module (8) and the tension adjusting component.

7. A lifting protection device according to any one of claims 2-4, characterized in that: At least two groups of the clutch assemblies are symmetrically arranged along the central plane of the load-bearing rope assembly (1) and the safety rope assembly (2); The clutch assembly includes an inclined plane clutch (17) and an elastic member (18). The inclined plane clutch (17) is sleeved on the outer side of the wheel body of the traction module (6) or the storage module (8), and the elastic member (18) is arranged between the inclined plane clutch (17) and the wheel body.

8. The lifting protection device according to claim 7, wherein: The transmission link assembly includes a transmission shaft. The power output end of the storage module (8) is a storage motor (22). The transmission shaft is connected to the power output end of the storage module (8). The driving member (21) is fixedly connected to the transmission shaft. Wheel bodies are arranged on both sides of the driving member (21), and the wheel bodies are slidably sleeved on the transmission shaft; The transmission link assembly further includes a toggle arm (19) and a driving arm (20). The toggle arm (19) is connected to the clutch disc of the inclined plane clutch (17). One end of the driving arm (20) is hinged to the toggle arm (19), and the other end is connected to the driving member (21). The driving member (21) drives the toggle arm (19) to rotate through the driving arm (20) to adjust the tightness of the elastic member (18).

9. A lifting protection method, characterized in that: The lifting protection method is applied to a lifting protection device according to any one of claims 1-8, and includes the following steps: S1. Connect the ropes of each of the rope assemblies to the device to be lifted respectively. S2. During lifting, control the load-bearing driving motor (10) and the storage motor (22) to rotate forward to drive the ropes to wind around the storage module (8). S3. During release, control the load-bearing driving motor (10) and the storage motor (22) to rotate reversely to drive the ropes to be released from the storage module (8). S4. Monitor and adjust the rope tension in real time through the tension adjusting mechanism. When the tension exceeds the threshold, the limit control member (13) is triggered. S5. The limit control member (13) controls the speed control mechanism (15) to adjust the action of the inclined plane clutch (17) and control the speed of the storage rope and / or the towing rope to ensure a stable lifting process. S6. When any rope breaks, the locking mechanism of the guiding module (7) is triggered to lock, realizing safety protection.

10. A lifting protection method according to claim 9, characterized in that: In the step S4, the displacement change of the tensioning pulley (11) drives the tensioning pulley traction frame to trigger the limit switch to adjust the tightness state of the rope. And / or, in the step S5, the driving member (21) adjusts the compression amount of the elastic member (18) between the inclined plane clutch (17) and the wheel body through the transmission link assembly to change the pressing force of the wheel body pressing against one side of the driving member (21) and control the rotation speed of the wheel body.

Images