A fixed crane small hook limiting device
By renovating the trigger block shape of the small hook limiting device of the fixed crane, reducing the accumulation of wire rope oil. Combined with the design of the limit switch, the failure problem of the limiting device caused by the accumulation of wire rope oil in the prior art is solved, and the safety of the crane is improved.
Patent Information
- Application Number
- CN202420967455.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-07
AI Technical Summary
During use, the existing fixed crane small hook limiting device is prone to blockage of the trigger block stroke due to the accumulation of dry solidified wire rope oil, and the limit switch fails, affecting the safe use of the crane.
A fixed crane small hook limiting device is designed to modify the shape of the trigger block, reduce the scratch area with the wire rope, avoid the accumulation of wire rope oil, and set the trigger end and wire in the limit switch to ensure signal transmission.
It effectively avoids the obstacles to the trigger block by the accumulation of wire rope oil, ensures the normal operation of the limit switch, prevents the crane from exceeding the safety range, and improves the safety of the crane.
Smart Images
Figure CN222699883U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cranes, and in particular relates to a fixed crane small hook limiting device. Background Art
[0002] The small hook limit device of a fixed crane refers to a safety protection device installed on the small hook of a fixed crane, which is used to limit the height of the hoisted object and prevent the crane from exceeding the safety range during operation, thereby ensuring the safety of the operation. The device is usually composed of a limit switch, a guide rail, a slider, etc. When the hoisted object rises or falls to the set height, the limit switch will automatically trigger, cut off the power supply of the crane, and stop the crane from running, thereby avoiding accidents.
[0003] During normal use, it often happens that dry and solidified wire rope oil accumulates on the surface of the limit trigger block, which hinders the travel of the trigger block and prevents the limit switch from moving, resulting in limit failure, seriously affecting the safe use of the crane. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a fixed crane hook limit device to solve the problem proposed in the above background technology that during normal use, dry and solidified wire rope oil is accumulated on the surface of the limit trigger block many times, which hinders the travel of the trigger block and makes it impossible to operate the limit switch, resulting in limit failure, which seriously affects the safe use of the crane.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixed crane hook limit device, comprising a support member, a lifting ring fixedly connected to the top of the support member, a chain movably connected inside the lifting ring, a connecting member fixedly connected to the bottom of the support member, a trigger block slidably connected to the outside of the connecting member, a limit switch fixedly connected to the inside of the support member, a funnel is provided on the top of the trigger block, steel wire ropes are arranged inside the support member and the trigger block, a movable block is fixedly connected to the outside of the steel wire rope, a fixed block is fixedly connected to the bottom of the steel wire rope, and a hook is fixedly connected to the bottom of the fixed block.
[0006] Preferably, two of the lifting rings and chains are symmetrically arranged and distributed on both sides of the top of the support.
[0007] Preferably, the connecting members are circular and are provided in plurality.
[0008] Preferably, a trigger end is provided at the bottom of the limit switch, and the trigger end is attached to the top of the trigger block.
[0009] Preferably, an electric wire is fixedly connected to the top of the limit switch, and the electric wire runs through the interior of the support.
[0010] Preferably, wire rope oil is provided on the surface of the steel wire rope.
[0011] Preferably, the movable block is located below the trigger block.
[0012] Compared with the prior art, the utility model provides a fixed crane small hook limiting device, which has the following beneficial effects:
[0013] 1. The utility model sets a fixed crane small hook limit device. Through the analysis of the components of the limit device, it is found that the trigger block has shape defects. After the dry and solidified wire rope oil is accumulated, the action limit switch function is insufficient, and the small hook stop rising signal sent to the crane control system fails. In severe cases, a top collision accident may occur. The defects of the device are solved by modifying the shape of the trigger block;
[0014] 2. The utility model provides a fixed crane hook limit device, which has the following advantages: 1. The trigger block does not scrape the wire rope, or the scraping area is reduced;
[0015] 2. The scraped wire rope oil does not accumulate on the trigger block;
[0016] 3. The action limit block of the trigger block is not blocked;
[0017] 4. After the movable block reaches the limited position, the limit switch sends the in-position stop signal to the control system and the function is normal.
[0018] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0020] Figure 1 This is a schematic diagram of the shaft side structure of one side of a fixed crane small hook limiting device proposed by the utility model;
[0021] Figure 2 This is a schematic diagram of the shaft side structure of the other side of a fixed crane small hook limiting device proposed by the utility model;
[0022] Figure 3 This is a front view structural schematic diagram of a fixed crane small hook limiting device proposed by the utility model;
[0023] Figure 4 This is a schematic diagram of the limit switch structure of a fixed crane hook limit device proposed by the utility model;
[0024] Figure 5 This is a schematic diagram of the funnel structure of a fixed crane small hook limiting device proposed by the utility model;
[0025] In the figure: support 1, lifting ring 2, chain 3, connecting piece 4, trigger block 5, limit switch 6, trigger end 7, wire 8, funnel 9, wire rope 10, movable block 11, fixed block 12, hook 13, wire rope oil 14. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] See also Figure 1-5 The utility model provides a technical solution: a fixed type crane small hook limit device, comprising a support member 1, a lifting ring 2 is fixedly connected to the top of the support member 1, a chain 3 is movably connected inside the lifting ring 2, a connecting member 4 is fixedly connected to the bottom of the support member 1, a trigger block 5 is slidably connected to the outer side of the connecting member 4, a limit switch 6 is fixedly connected inside the support member 1, a funnel 9 is provided on the top of the trigger block 5, a steel wire rope 10 is arranged inside the support member 1 and the trigger block 5, a movable block 11 is fixedly connected to the outer side of the steel wire rope 10, a fixed block 12 is fixedly connected to the bottom of the steel wire rope 10, and a hook 13 is fixedly connected to the bottom of the fixed block 12. By analyzing the components of the limit device, it is found that the trigger block has shape defects. After the dry and solidified steel wire rope oil is accumulated, the action limit switch function is insufficient, and the small hook stop rising signal sent to the crane control system fails. In severe cases, a top collision accident may occur. The defects of the device are solved by modifying the shape of the trigger block.
[0028] In the present invention, preferably, two rings 2 and two chains 3 are symmetrically arranged and distributed on both sides of the top of the support member 1 .
[0029] In the present invention, preferably, the connecting members 4 are circular and are provided in plurality.
[0030] In the present invention, preferably, a trigger end 7 is provided at the bottom of the limit switch 6 , and the trigger end 7 is attached to the top of the trigger block 5 .
[0031] In the present invention, preferably, a wire 8 is fixedly connected to the top of the limit switch 6 , and the wire 8 runs through the interior of the support 1 .
[0032] In the present invention, preferably, the surface of the steel wire rope 10 is provided with steel wire rope oil 14 .
[0033] In the present invention, preferably, the movable block 11 is located below the trigger block 5 .
[0034] The working principle and use process of the utility model: when in use, the support member 1 plays the role of a basic structure, providing a stable fixing point for the entire limit device, and its top is fixedly connected with a lifting ring 2, and a chain 3 is movably connected inside the lifting ring 2. The function of the chain 3 is to ensure that the hook will not exceed the set height when the hook 13 rises, thereby ensuring the safety of the crane operation. At the bottom of the support member 1, a connecting member 4 is fixedly connected, and a trigger block 5 is slidably connected to its outer side. A funnel 9 is provided on the top of the trigger block 5 for guiding the movement of the wire rope 10. A wire rope 10 is arranged inside the support member 1 and the trigger block 5. A movable block 11 is fixedly connected to the outer side of the wire rope 10, and a fixed block 12 is fixedly connected to the bottom, and a hook 13 is fixedly connected to the bottom of the fixed block 12. The limit switch 6 is the core component of the entire device. Its function is to trigger the funnel 9 on the trigger block 5 when the hook 13 rises to a certain height, so that the wire rope 10 drives the movable block 11 to rise, and finally triggers A limit switch 6 is triggered, and a trigger end 7 is provided at the bottom of the limit switch 6 for fitting with the top of the trigger block 5. When the trigger block 5 is pushed by the funnel 9, the trigger end 7 will trigger the limit switch 6, thereby sending a signal that the small hook stops rising. In addition, a wire 8 is fixedly connected to the top of the limit switch 6, and the wire 8 runs through the interior of the support 1 to transmit the trigger signal to the crane control system to achieve precise control of the crane hook. The surface of the wire rope 10 is provided with wire rope oil 14 to reduce the friction between the wire rope 10 and the movable block 11 to ensure its smooth movement. The movable block 11 is located below the trigger block 5, and through the connection with the wire rope 10, the movement of the trigger block 5 is converted into the triggering of the limit switch 6. In general, the device realizes the safe limit of the crane hook during the rising process through the coordinated action of the lifting ring 2, the chain 3, the connecting piece 4, the trigger block 5, the limit switch 6, the wire rope 10, the movable block 11 and the hook 13, thereby ensuring the safety of the crane operation.
[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fixed crane hook limiting device, comprising a support member (1), characterized in that: The top of the support member (1) is fixedly connected to a lifting ring (2), the lifting ring (2) is movably connected to a chain (3), the bottom of the support member (1) is fixedly connected to a connecting member (4), the outer side of the connecting member (4) is slidably connected to a trigger block (5), the support member (1) is fixedly connected to a limit switch (6), the top of the trigger block (5) is provided with a funnel (9), the support member (1) and the trigger block (5) are both provided with a steel wire rope (10), the outer side of the steel wire rope (10) is fixedly connected to a movable block (11), the bottom of the steel wire rope (10) is fixedly connected to a fixed block (12), and the bottom of the fixed block (12) is fixedly connected to a lifting hook (13).
2. A fixed crane hook limiting device according to claim 1, characterized in that: The lifting ring (2) and the chain (3) are symmetrically arranged in two numbers and are distributed on both sides of the top of the supporting member (1).
3. A fixed crane hook limiting device according to claim 1, characterized in that: The connecting pieces (4) are circular and are provided in plurality.
4. A fixed crane small hook limiting device according to claim 1, characterized in that: The limit switch (6) is provided with a trigger end (7) at the bottom, and the trigger end (7) is attached to the top of the trigger block (5).
5. A fixed crane small hook limiting device according to claim 1, characterized in that: The top of the limit switch (6) is fixedly connected with an electric wire (8), and the electric wire (8) runs through the interior of the support member (1).
6. A fixed crane small hook limiting device according to claim 1, characterized in that: The surface of the steel wire rope (10) is provided with steel wire rope oil (14).
7. A fixed crane small hook limiting device according to claim 1, characterized in that: The movable block (11) is located below the trigger block (5).