Safety lifting hook of tower crane
By installing a weightlessness monitoring switch and a self-locking sector-shaped swing block device on the hook of a tower crane, the problem of heavy objects falling due to wire rope breakage has been solved, ensuring the safety and reliability of the hook and preventing accidents.
Patent Information
- Application Number
- CN202520427840.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing tower crane hooks cannot effectively prevent heavy objects from falling due to broken wire ropes, posing a safety hazard.
A weightlessness monitoring switch and a self-locking sector-shaped swing block device are installed on the hook of a tower crane. The wire rope is automatically locked when the wire rope breaks through the linkage mechanism and the swing block self-locking device to prevent the hook from falling.
It achieves real-time protection in the event of wire rope breakage, preventing the hook from falling, improving the safety and reliability of the crane, and reducing the probability of safety accidents.
Smart Images
Figure CN223852078U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the crane field, concretely relates to a crane safety hook. BACKGROUND
[0002] In recent years, the state continuously increases the infrastructure construction investment, high-rise, super high-rise building gradually increases, and the building market competition is increasingly fierce, which forces the building construction enterprise to continuously improve the self productivity, and the construction process is developing towards the mechanization, intelligentization and green building, and during the period, the tower crane is widely used in the building construction site due to the advantages of high working efficiency, large working range, simple structure, safety and reliability.
[0003] The tower crane hook used in the building site at present is all two times ratio double pulley structure. The hook cannot prevent the heavy object falling accident caused by the broken hoisting steel wire rope, and the safety accident such as falling object injury is easily caused in use, and there is a safety hidden danger, and the hoisting machine broken rope accident has not been effectively solved, in order to effectively prevent the production safety accident caused by the main rope breakage of the tower crane, improve the safety and reliability of the hoisting equipment.
[0004] Therefore, the applicant proposes a tower crane safety hook which is simple in structure, good in use effect, can be used under the condition that the hoisting machine steel wire rope is broken, and can avoid safety accidents. SUMMARY
[0005] The utility model wants to solve the technical problem to provide a safe and reliable crane hook.
[0006] When the broken rope accident occurs in the operation process of the hoisting machine, the heavy object falling situation occurs, and the serious safety accident is caused. The application proposes a kind of safety performance high, structure simple, can avoid the occurrence of heavy object falling when broken.
[0007] To achieve the above object, the utility model provides the following technical scheme:
[0008] A tower crane safety hook, including frame body 12 and hoisting machine steel wire rope 1, the frame body 12 is equipped with hook body 13 and two groups of pulleys 14, the hoisting machine steel wire rope 1 is wound on pulley 14, characterized by: frame body 12 is equipped with safety mechanism, the safety mechanism at least includes restriction mechanism and locking mechanism, the locking mechanism includes self-locking sectoral swing block 8 and self-locking baffle 9, the self-locking sectoral swing block 8 and self-locking baffle 9 are respectively arranged on the two sides of hoisting machine steel wire rope 1, the self-locking sectoral swing block 8 can swing to the direction of self-locking baffle 9 when the steel wire rope breaks, and the self-locking sectoral swing block 8 and self-locking baffle 9 after swinging will clamp the hoisting machine steel wire rope 1.
[0009] As improvement, the limiting mechanism comprises a rocker arm 5, a lever 6, a pull rope 11 and a tension spring 10, one end of the rocker arm 5 is hinged on a frame 12, the other end is connected with a driving mechanism, the driving mechanism can drive the rocker arm to swing, the middle part of the lever 6 is hinged on the frame 12, one end of the lever 6 is clamped on the rocker arm 5, the other end of the lever 6 is connected with a straight arm 7 provided on a self-locking sector block 8 through the pull rope 11, the self-locking sector block 8 and the straight arm 7 are hard connected to form a fixed included angle, one end of the tension spring 10 is connected with the straight arm 7, the other end is connected with the frame 12, the swinging of the rocker arm 5 can separate the lever 6 from the rocker arm 5, after separation, the self-locking sector block 8 can swing to the direction of a self-locking baffle 9 to clamp the crane wire rope 1.
[0010] As improvement, the self-locking sector block 8 and the self-locking baffle 9 are arranged between the two groups of pulleys 14.
[0011] As improvement, the self-locking sector block 8 is provided with two groups, which are arranged at the two ends of the self-locking baffle 9 respectively and are arranged between the two groups of pulleys 14.
[0012] As improvement, the driving mechanism at least comprises a weight loss monitoring switch 2, an electromagnetic coil 3, a moving iron core 4 and a power supply unit, the weight loss monitoring switch 2 comprises a steel ball 15, a contact 17 and a conical spring 16, when the wire rope is broken, the frame 12 appears weight loss, the steel ball 15 will touch the contact 17 to turn on the circuit composed of the weight loss monitoring switch 2, the electromagnetic coil 3, the moving iron core 4 and the power supply unit, the electromagnetic coil 3 drives the moving iron core 4 to reciprocate, one end of the moving iron core 4 is connected with the free end of the rocker arm 5.
[0013] Compared with the prior art, the crane wire rope breaking indication device has the advantages of simple structure, good use effect, can show the lifting hook under the condition of crane wire rope breaking, avoids safety accidents and the like.
[0014] In actual use, the weightlessness monitoring switch is installed on the outer side of the hook frame body 12, that is, when the hoisting steel wire rope on both sides of the hook breaks at any point, the hook is in a weightlessness state, at this time, the weightlessness monitoring switch detects the weightlessness state of the hook in the first time, the steel ball in the weightlessness monitoring switch is also in a weightlessness state, the weightless steel ball 15 loses the pressure on the conical spring 16, the steel ball moves upward out of the door contact 17 under the action of the tension of the conical spring, thereby triggering the micro switch to close the electromagnetic coil loop, the electromagnetic coil 3 can drive the moving iron core 4 to reciprocate, under the action of the electromagnetic force, the rocker arm 5 is pushed to swing, after the rocker arm 5 swings, the lever 6 is separated from the rocker arm 5, the lever rotates clockwise under the action of the tension spring 10, the two self-locking sector blocks 8 rotate to the respective self-locking directions under the action of the tension spring 10, the self-locking sector blocks are simultaneously self-wedged with the lower baffle under the action of the tension spring 10 and the traction force of the steel wire rope, thereby locking the steel wire rope, the hook is stopped from falling, and the protection effect is achieved, the device can play a protection effect in the case that the steel wire rope is suddenly disconnected, is safe and reliable in use, effectively prevents the lifting injury accident caused by the disconnection of the hoisting steel wire rope, the indirect economic benefit is obviously improved after the device is used, and the device has a wide popularization prospect.
[0015] The weightlessness monitoring switch and the self-locking sector block are installed on the hook, when the weightlessness monitoring switch detects the weightlessness of the hook, the steel wire rope is locked through the connecting rod mechanism and the block self-locking device, the hook is prevented from falling, and the safety protection effect is achieved.
[0016] The automatic detection of the weightlessness of the hook of the crane is realized, the real-time tracking of the disconnection of the crane is realized, the improvement cost is low, the protection effect is obvious, the device can lock the main rope in the first time, and the falling of the hook is prevented.
[0017] The weightlessness monitoring switch installed on the outer side of the hook can detect the weightlessness of the hook in real time, that is, when the hoisting steel wire rope on both sides of the hook breaks at any point, the hook is in a weightlessness state, at this time, the weightlessness monitoring switch can quickly capture the physical phenomenon that the hook is in a weightlessness state, and the triggering linkage circuit is turned on, the hoisting rope is clamped through the connecting rod self-locking device, the falling of the hook is prevented, and the protection effect is achieved.
[0018] The weightlessness monitoring switch and the sector block self-locking device are installed, the disconnection protection effect can be achieved in the length range of the whole hoisting steel wire rope, and the falling of the hook is prevented to cause a production safety accident. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a structural schematic view of the utility model.
[0020] Figure 2 It is a structural schematic view of a limiting mechanism and a driving mechanism.
[0021] In the diagram: 1 is the crane wire rope, 2 is the weightlessness monitoring switch, 3 is the electromagnetic coil, 4 is the moving iron core, 5 is the rocker arm, 6 is the lever, 7 is the straight arm, 8 is the self-locking fan-shaped swing block, 9 is the self-locking baffle, 10 is the tension spring, 11 is the pull rope, 12 is the frame, 13 is the hook, 14 is the pulley, 15 is the steel ball, 16 is the conical spring, and 17 is the contact point. Detailed Implementation
[0022] The following embodiments further illustrate the above-described content of the present invention in detail. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0023] Example 1: Refer to Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model. This embodiment discloses a safety hook for a tower crane, including a frame 12 and a crane wire rope 1. The frame 12 is provided with a hook body 13 and two sets of pulleys 14. The crane wire rope 1 is wound around the pulleys 14. The key feature is that the frame 12 is also provided with a safety mechanism. The safety mechanism includes at least a limiting mechanism and a locking mechanism. The locking mechanism includes a self-locking fan-shaped swing block 8 and a self-locking baffle 9. The self-locking fan-shaped swing block 8 and the self-locking baffle 9 are respectively arranged on both sides of the crane wire rope 1. When the wire rope breaks, the self-locking fan-shaped swing block 8 can swing towards the self-locking baffle 9. After swinging, the self-locking fan-shaped swing block 8 and the self-locking baffle 9 clamp the crane wire rope 1.
[0024] As an improvement, the limiting mechanism includes a rocker arm 5, a lever 6, and a pull rope 11. One end of the rocker arm 5 is hinged to the frame 12, and the other end is connected to the drive mechanism, which can drive the rocker arm to swing. The middle part of the lever 6 is hinged to the frame 12, and one end of the lever 6 is engaged with the rocker arm 5. The other end of the lever 6 is connected to the self-locking fan-shaped swing block 8 through the pull rope 11. The swing of the rocker arm 5 can separate the lever 6 from the rocker arm 5. After separation, the self-locking fan-shaped swing block 8 can swing towards the self-locking baffle 9 to clamp the crane wire rope 1.
[0025] As an improvement, a tension spring 10 is also provided, one end of which is connected to the self-locking fan-shaped swing block 8, and the other end is connected to the crane wire rope 1 or the self-locking baffle 9; or the self-locking fan-shaped swing block 8 is provided with a straight arm 7, the pull rope 11 is connected to the straight arm 7, one end of the tension spring 10 is also connected to the straight arm 7, and the other end is connected to the frame 12, a pin is provided on the frame 12, and the tension spring 10 is connected to the pin of the frame 12.
[0026] As an improvement, the self-locking sector-shaped swing block 8 and the self-locking baffle 9 are arranged between the two sets of pulleys 14.
[0027] As an improvement, the self-locking fan-shaped block 8 is provided with two groups, which are respectively arranged at the two ends of the self-locking baffle 9 and are arranged between the two groups of pulleys 14.
[0028] As an improvement, the driving mechanism at least comprises the weightlessness monitoring switch 2, the electromagnetic coil 3, the moving iron core 4 and the power supply unit. The weightlessness monitoring switch 2 comprises a steel ball 15, a contact 17 and a conical spring 16. When the steel wire rope is broken, the frame body 12 appears weightlessness, the steel ball 15 touches the contact 17 to turn on the circuit composed of the weightlessness monitoring switch 2, the electromagnetic coil 3, the moving iron core 4 and the power supply unit, the electromagnetic coil 3 drives the moving iron core 4 to reciprocate, and one end of the moving iron core 4 is connected to the free end of the rocker arm 5.
[0029] The frame body 12 is two plate-shaped bodies which are connected through bolts and form an overhead layer in the middle, the locking mechanism is arranged in the overhead layer, and the limiting mechanism and the driving mechanism are arranged on the outer side of the overhead layer, i.e. the outer surface of the plate body of the frame body.
Claims
1. A tower crane safety hook, comprising a frame (12) and a crane wire rope (1), the frame (12) is provided with a hook body (13) and two groups of pulleys (14), the crane wire rope (1) is wound on the pulleys (14), characterized in that: The frame body (12) is further provided with a safety mechanism, which comprises at least a limiting mechanism and a locking mechanism, the locking mechanism comprises a self-locking fan-shaped swing block (8) and a self-locking baffle (9), the self-locking fan-shaped swing block (8) and the self-locking baffle (9) are arranged on both sides of the crane wire rope (1), and the self-locking fan-shaped swing block (8) can swing towards the self-locking baffle (9) when the wire rope breaks, and the self-locking fan-shaped swing block (8) and the self-locking baffle (9) clamp the crane wire rope (1) after swinging.
2. A tower crane safety hook as claimed in claim 1, characterised in that: The limiting mechanism comprises a rocker arm (5), a lever (6), a pull rope (11) and a tension spring (10), one end of the rocker arm (5) is hinged to the frame body (12), the other end is connected to a driving mechanism, the driving mechanism can drive the rocker arm to swing, the middle part of the lever (6) is hinged to the frame body (12), one end of the lever (6) is clamped on the rocker arm (5), the other end of the lever (6) is connected to a straight arm (7) provided on the self-locking fan-shaped swing block (8) through the pull rope (11), the self-locking fan-shaped swing block (8) and the straight arm (7) are hard connected to form a fixed included angle, one end of the tension spring (10) is connected to the straight arm (7), and the other end is connected to the frame body (12), the rocker arm (5) swings to separate the lever (6) from the rocker arm (5), and the self-locking fan-shaped swing block (8) can swing towards the self-locking baffle (9) to clamp the crane wire rope (1) after separation.
3. A tower crane safety hook as claimed in claim 2, characterised in that: The driving mechanism comprises at least a weight loss monitoring switch (2), an electromagnetic coil (3), a moving iron core (4) and a power supply unit, the weight loss monitoring switch (2) comprises a steel ball (15), a contact (17) and a conical spring (16), when the wire rope breaks, the frame body (12) loses weight, the steel ball (15) touches the contact (17) to turn on the circuit composed of the weight loss monitoring switch (2), the electromagnetic coil (3), the moving iron core (4) and the power supply unit, the electromagnetic coil (3) drives the moving iron core (4) to reciprocate, and one end of the moving iron core (4) is connected to the free end of the rocker arm (5).
4. A tower crane safety hook as claimed in claim 1, 2 or 3, characterised in that: The self-locking fan-shaped swing block (8) and the self-locking baffle (9) are arranged between the two groups of pulleys (14).
5. A tower crane safety hook as claimed in claim 1, 2 or 3, characterised in that: The self-locking fan-shaped swing block (8) is provided with two groups, which are arranged at two ends of the self-locking baffle (9) and between the two groups of pulleys (14).
6. A tower crane safety hook as claimed in claim 4, characterised in that: The self-locking fan-shaped swing block (8) is provided with two groups, which are arranged at two ends of the self-locking baffle (9) and between the two groups of pulleys (14).