Lifting hook winding equipment of tower crane lifting frame
By combining limiters and position detection devices, and using infrared ranging sensors and electromagnets to control pulleys, the problem of collision between the hook and the boom is solved, thus achieving safety and controllability in tower crane lifting operations.
Patent Information
- Application Number
- CN202520119096.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-17
AI Technical Summary
During the winding process, the hook is prone to collision or swaying with the boom, which can lead to safety hazards. Existing technology makes it difficult to effectively control the distance between the hook and the boom.
A combination of limiters and position detection devices is used, and the rotation of the pulley is controlled by an infrared distance sensor and an electromagnet to ensure a safe distance between the hook and the boom. This includes the coordinated use of electromagnets, push rods, and brake pads to limit the pulley.
This effectively avoids collisions between the hook and the boom, ensuring the safety of tower crane lifting operations and improving the controllability and safety of hook retraction and extension.
Smart Images
Figure CN223722566U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane equipment, specifically a hook winding device for tower crane lifting frames. Background Technology
[0002] Tower cranes are common construction equipment on construction sites, possessing strong capabilities in lifting and transporting heavy objects. Their main principle is to drive the hook via a drive mechanism and pulley assembly, thereby suspending and lifting heavy objects. During suspended lifting operations, the distance between the hook and the boom must be kept appropriate. Because the hook itself is heavy, if the hook retracts excessively and the retraction distance cannot be controlled, a collision between the hook and the boom can occur, potentially causing damage to either the hook or the boom. Furthermore, if the hook is too far from the boom when not in use, excessive hook sway can cause damage to surrounding objects. Therefore, the distance must be controlled when the tower crane is not in use.
[0003] Therefore, based on the above issues, installing a hook rewinding device on the tower crane lifting frame can prevent the hook from colliding with the boom due to excessive retraction, thereby ensuring the safety of the crane during hook rewinding and unwinding operations and ensuring the safe operation of the tower crane. Utility Model Content
[0004] The purpose of this invention is to provide a hook rewinding device for tower crane lifting frames, which can ensure that there is no collision between the hook and the boom during tower crane hook rewinding and unwinding operations, thereby ensuring the safety of tower crane operations.
[0005] To achieve the above objectives, this utility model employs the following technical solution:
[0006] A hook winding device for a tower crane lifting frame includes a hook, and a pulley is provided above the hook, with the pulley being fitted into a groove.
[0007] A limiting component is provided on the outer side of the wheel groove, and a position detection component is provided in cooperation with the limiting component. The position detection component is connected to the limiting component. When the position detection component detects that the hook is close to the lifting arm, it controls the limiting component and restricts the position of the pulley.
[0008] The limiting component includes an electromagnet and a push rod. The electromagnet is located on the outside of the wheel groove. One end of the push rod is equipped with a magnet with the opposite magnetic pole to that of the electromagnet when it is energized, and the other end slides through the wheel groove and is connected to a brake pad.
[0009] The detection piece is an infrared distance measuring sensor, two of which are symmetrically arranged above the hook, and each is individually connected with the limiting piece.
[0010] The electromagnet and the infrared distance measuring sensor are both connected with a control system, which controls the electromagnet and the infrared distance measuring sensor.
[0011] Compared with the prior art, the present application has the advantages of:
[0012] When the device is set, the limiting piece and the position detection piece are set, the position detection piece can detect the distance between the hook and the tower crane jib, so as to determine whether the distance between the hook and the jib is safe, and the limiting piece can limit the rotation of the pulley matched with the hook, so that the hook pulley cannot normally rise when the distance between the hook and the jib is too large, thereby avoiding collision between the hook and the jib. BRIEF DESCRIPTION OF DRAWINGS
[0013] ATTACHED Figure 1 is a structural schematic view of the present application.
[0014] ATTACHED Figure 2 is a partial structural schematic view of the present application.
[0015] ATTACHED Figure 3 is a structural schematic view of the present application.
[0016] Reference numerals in the drawings:
[0017] 1, hook; 2, pulley; 3, limiting piece; 4, detection piece; 5, push rod; 6, electromagnet; 7, brake pad; 8, infrared distance measuring sensor. DETAILED DESCRIPTION
[0018] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various changes or modifications to the present application, and these equivalent forms also fall within the scope defined by the present application.
[0019] The hook 1 needs to ensure that the distance between the hook 1 and the crane arm is not too close during the heavy object suspension operation, because the hook 1 itself is heavy, and when the hook 1 is reeled to a large extent and cannot control the retraction distance, the problem of collision between the hook 1 and the crane arm will occur, thereby causing the dangerous accident of damage to the hook 1 or the crane arm. For the traditional hook 1 reeling mode, the driver will manually stop when the hook 1 approaches the crane arm, which not only produces certain safety hazards, but also is not conducive to the safety of the tower crane operation.
[0020] Therefore, in view of the above technical problems, the hook 1 reeling equipment of the tower crane lifting frame is set:
[0021] The hook 1 is provided with a pulley 2 above, and the pulley 2 is provided in the wheel groove; when applied, the steel cable can be wound on the pulley 2, so that the steel cable is driven to move the hook 1 up and down.
[0022] Most importantly, a limiting piece 3 is arranged outside the wheel groove, and the limiting piece 3 is provided with a position detection piece 4 connected with the limiting piece 3, and when the position detection piece 4 detects that the hook 1 is close to the crane arm, the limiting piece 3 is controlled and the position of the pulley 2 is limited. Here, the position detection piece 4 is arranged to detect the distance between the hook 1 and the crane arm, so as to judge the distance between the hook 1 and the crane arm; when the position detection piece 4 detects that the distance between the hook 1 and the crane arm is small, the limiting piece 3 is controlled to limit the normal rotation of the pulley 2, so as to limit the position of the pulley 2 and make the steel cable unable to normally retract, so as to limit the position of the hook 1. It should be noted that during the retraction operation of the tower crane hook 1, the driver can observe the position of the hook 1 with his naked eye, but the specific distance below can only be estimated by the naked eye, so the position detection piece 4 needs to accurately identify the distance between the hook 1 and the crane arm, so as to avoid the problem of collision of the hook 1.
[0023] Therefore, the above structure is further designed and optimized as follows:
[0024] The limiting piece 3 includes an electromagnet 6 and a push rod 5, the electromagnet 6 is arranged outside the wheel groove, one end of the push rod 5 is provided with a magnet opposite to the magnetic pole of the electromagnet 6 when the electromagnet 6 is electrified, and the other end is connected with a brake pad 7 after sliding through the wheel groove. For the electromagnet 6 arranged here, the push rod 5 can be driven to move, when the position detection piece 4 detects that the distance between the hook 1 and the crane arm is too close, the electromagnet 6 is controlled to be electrified and push the push rod 5 outward by magnetic force, so that the brake pad 7 connected with the push rod 5 generates a force between the pulleys 2, limiting the normal rotation of the pulleys 2. When the normal rotation of the pulley 2 is limited, the steel cable cooperatively arranged on the pulley 2 cannot effectively stretch and contract, so that the hook 1 cannot be effectively moved; at the same time, the operator can also get the information feedback of the electromagnet 6 drive, so that the drive mechanism for driving the steel cable to contract is stopped, to facilitate the operator to control it.
[0025] The detection piece 4 is an infrared distance sensor 8, two infrared distance sensors 8 are symmetrically arranged above the hook 1, and each infrared distance sensor 8 is individually connected with the limiting piece 3; for the infrared distance sensor 8 arranged here, two infrared distance sensors 8 are symmetrically arranged above the hook 1, the infrared distance sensor 8 arranged can identify the distance between the hook 1 and the crane arm, and the two infrared distance sensors 8 arranged here can identify the symmetric position of the hook 1, because in some cases the hook 1 can be tilted in position angle due to the suspension of the noon, and the two infrared distance sensors 8 arranged can detect the distance, when the hook 1 is tilted and the infrared distance sensor 8 on one side cannot effectively perform position sensing operation, the infrared distance sensor 8 on the other side can detect the distance to ensure the effectiveness of the device.
[0026] The electromagnet 6 and the infrared distance sensor 8 are connected with a control system, the electromagnet 6 and the infrared distance sensor 8 are controlled by the control system to achieve the intelligent setting requirement of the device.
[0027] Therefore, the hook 1 winding equipment of the tower crane lifting frame can avoid the problem that the hook 1 collides with the crane arm due to excessive contraction, so as to ensure the safety of the crane in the operation of the hook 1, and ensure the safe operation of the tower crane.
Claims
1. A tower crane hoist hook (1) winding device, comprising a hoist hook (1), a pulley (2) is arranged above the hoist hook (1) and is arranged in a wheel groove; characterized in that A limiting piece (3) is arranged outside the wheel groove, and the limiting piece (3) is arranged with a position detection piece (4), the position detection piece (4) is connected with the limiting piece (3), when the position detection piece (4) detects that the hoist hook (1) is close to the hoist arm, the limiting piece (3) is controlled and the position of the pulley (2) is limited.
2. The hook (1) winding device of the tower crane lifting frame according to claim 1, characterized in that: The limiting piece (3) comprises an electromagnet (6) and a push rod (5), the electromagnet (6) is arranged outside the wheel groove, one end of the push rod (5) is provided with a magnet opposite to the magnetic pole of the electromagnet (6) when the electromagnet (6) is energized, and the other end of the push rod (5) is connected with a brake pad (7) after sliding through the wheel groove.
3. The hook (1) winding device of the tower crane lifting frame according to claim 2, characterized in that: The detection piece (4) is an infrared distance sensor (8), two infrared distance sensors (8) are symmetrically arranged above the hoist hook (1), and each infrared distance sensor (8) is individually connected with the limiting piece (3).
4. The hook (1) winding device of the tower crane lifting frame according to claim 3, characterized in that: The electromagnet (6) and the infrared distance sensor (8) are connected with a control system, and the electromagnet (6) and the infrared distance sensor (8) are controlled by the control system.