Jacking anti-falling mechanism of lifting hook, lifting device and crane
By installing a limit column and a limit assembly on the hook and using the structure of the limit column and the limit block to fix the hook, the problem of wire rope breakage when the hook hits the top is solved, and safe and reliable hook fixation is achieved to prevent falling.
Patent Information
- Application Number
- CN202422691453.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-05
AI Technical Summary
The crane hook is prone to collide with the boom when hitting the top, causing the wire rope to be overloaded and broken, posing a safety hazard. After long-term use, the load-bearing capacity of the wire rope is reduced, which can easily lead to hook falling accidents.
A limit column and a limit assembly are installed on the hook. The limit column is inserted between the limit blocks and guided by the guide rope. The limit column and the limit block cooperate to fix the hook to prevent it from falling.
It effectively prevents the wire rope from breaking when the hook hits the top, avoids the hook from falling, improves safety, and reduces the wear and fatigue of the wire rope.
Smart Images
Figure CN223372636U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of engineering machinery, in particular to a hook top impact anti-falling mechanism, a lifting device and a crane. Background Art
[0002] The hook of a crane is usually driven by a hoisting mechanism, with the lifting and lowering of the hook controlled by the traction of a wire rope. Generally, when the crane is lifting the hook, it is easy for the hook to collide with the boom when it reaches the upper end of its travel. Especially when the hook is lifting a heavy object, the collision with the boom can cause the wire rope to overload at the moment of the hook collision. The overloaded hook will cause the wire rope to bear a tension beyond its rated load capacity, which can easily lead to wire rope breakage. In addition, the wire rope will be affected by factors such as wear, corrosion, and fatigue during long-term use, and its load capacity will gradually decrease. When the hook hits the top, the sudden increase in tension may exceed the load capacity of the already damaged wire rope, which can also easily lead to wire rope breakage. After the wire rope breaks, the hook and the load hanging from the hook will directly fall, causing a safety accident. Therefore, appropriate measures must be taken to avoid the safety hazard of the hook falling due to wire rope breakage after the hook hits the top. Utility Model Content
[0003] The purpose of the utility model is to overcome the technical defect in the prior art that the wire rope of the crane hook is easily broken when hitting the top, thereby causing the hook to fall, and to provide a hook top-impact anti-falling mechanism, a lifting device and a crane.
[0004] In the first aspect, the utility model provides a top-impact anti-fall mechanism for a hook, comprising a limit column, a limit assembly and a guide rope, wherein the limit column or the limit assembly is installed on the hook, and the limit assembly is arranged corresponding to the limit column, and the limit assembly comprises two relatively arranged limit blocks, at least one of the two limit blocks is provided with an elastic part, and the limit column can compress the elastic part and be clamped between the two limit blocks; the guide rope passes through the gap between the limit blocks and is fixedly connected to the limit column.
[0005] In order to avoid the technical problem in the prior art that the hook hits the top and breaks the wire rope and then falls, causing a safety accident, the present application installs a limit column on the hook and installs a limit assembly above the limit column, or installs a limit assembly on the hook, and installs the limit column above the limit assembly. As the hook moves upward, the limit column can be inserted between the two limit blocks in the limit assembly, and the hook can be fixed by utilizing the structural cooperation between the limit column and the limit block. For example, the limit column can be a mushroom head structure with one end being thick and the other end being thin. The limit block can be first opened and entered, and then clamped by the limit block for engagement. A slot can also be provided on the limit column, and a snap ring that cooperates with the slot can be provided on the limit block. The relative fixation of the limit column and the limit block can also be achieved, thereby preventing the hook from falling and forming a safety hazard. In addition, a guide rope is connected to the end of the limit column facing the limit assembly and passed through the limit assembly, so that the limit column can be accurately guided to the gap between the limit blocks, thereby avoiding deviation and inability to align causing limit failure.
[0006] Preferably, an outwardly protruding clamping portion is formed on the upper end of the limiting column, and the clamping portion can pass through the gap between the limiting blocks and abut against the limiting blocks to fix the limiting column.
[0007] Preferably, a guide opening is formed between the two limiting blocks, and the opening direction of the guide opening is toward the limiting column.
[0008] Preferably, the opening size of the guide port is larger than the outer diameter of the clamping portion.
[0009] Preferably, the guide rope is provided with a first hoisting mechanism at the other end relative to the limiting column.
[0010] In a second aspect, the utility model provides a lifting device, comprising a hook, a connecting seat, a fixing seat and the hook's anti-falling mechanism as described above, wherein the hook is connected below the connecting seat and the fixing seat is suspended above the connecting seat.
[0011] Preferably, it includes two groups of limiting columns, limiting components and guide ropes, the two groups of limiting columns are respectively fixedly connected to the two sides of the connecting seat, the two groups of limiting components are respectively fixedly connected to the two sides of the fixing seat and correspond one-to-one with the two groups of limiting columns, and the two guide ropes pass through the two groups of limiting components and are correspondingly connected to the two groups of limiting columns.
[0012] Preferably, it includes two groups of limiting columns, limiting components and guide ropes, the two groups of limiting columns are respectively fixedly connected to the two sides of the fixing seat, the two groups of limiting components are respectively fixedly connected to the two sides of the connecting seat and correspond one-to-one with the two groups of limiting columns, and the two guide ropes pass through the two groups of limiting components and are correspondingly connected to the two groups of limiting columns.
[0013] In a third aspect, the utility model provides a crane comprising the hook's anti-fall mechanism or lifting device as described above, and also comprising a second hoisting mechanism, a lifting arm and a pulley block, wherein the pulley block and the second hoisting mechanism are respectively arranged at both ends of the lifting arm.
[0014] Preferably, the second hoisting mechanism is connected to the hook via a steel wire rope, and the steel wire rope passes around the pulley block.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The anti-falling mechanism of the hook of the present invention can be achieved by installing a limit column on the hook and installing a limit assembly above the limit column, or installing a limit assembly on the hook and installing the limit column above the limit assembly. As the hook moves upward, the limit column can be inserted between the two limit blocks in the limit assembly. The structural cooperation between the limit column and the limit block can be used to fix the hook, thereby preventing the hook from falling and forming a safety hazard. In addition, a guide rope is connected to the end of the limit column facing the limit assembly and passed through the limit assembly, so that the limit column can be accurately guided to the gap between the limit blocks, thereby avoiding deviation and inability to align resulting in limit failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the first structure of the lifting device of the present utility model.
[0018] Figure 2 This is a second structural schematic diagram of the lifting device of the present utility model.
[0019] Markings in the figure:
[0020] 1. Limit column, 11. Clamping part, 2. Limit assembly, 21. Limit block, 22. Elastic part, 23. Guide port, 3. Guide rope, 4. First hoisting mechanism, 5. Hook, 6. Connecting seat, 7. Fixed seat, 8. Pulley block, 9. Wire rope. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.
[0022] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "center," "inside," and "outside" are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the product / device / apparatus of the present invention is placed when it is conventionally used. These terms of orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians, and do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, they should not be understood as limitations on the present invention.
[0023] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present utility model.
[0024] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.
[0025] In addition, in the description of the embodiments of the present invention, "several", "a plurality", and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.
[0026] Furthermore, in the description of the technical solutions of this utility model, unless otherwise expressly specified / defined / restricted, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welding, riveting, bolting, threading, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communication connections; they may be direct connections, indirect connections through an intermediate medium, or internal connections between two components.
[0027] Example 1
[0028] This embodiment provides a hook anti-fall mechanism.
[0029] like Figure 1 and Figure 2 As shown in , the anti-falling mechanism of the hook described in this embodiment may include a limit column 1, a limit assembly 2 and a guide rope 3. The limit column 1 is connected to the hook 5 to form a whole. The limit assembly 2 can be set corresponding to the limit column 1. The limit assembly 2 includes a plurality of limit blocks 21, for example, two limit blocks 21 that are spaced apart and relatively set. As the hook 5 moves upward, the limit column 1 can be inserted into the gap between the two limit blocks 21 for fixation, so that the hook 5 is clamped in the limit assembly 2 for relative fixation. When the wire rope 9 connected to the hook 5 breaks, the hook 5 can also be fixed on the limit assembly 2 to prevent falling, thereby avoiding safety accidents.
[0030] The limit column 1 and the limit block 21 can be fixed by means of structural cooperation between each other. Specifically, the limit column 1 can be a mushroom head structure with one end thick and the other end thin. The gap between the two limit blocks 21 can be formed into a guide opening 23 similar to a trumpet mouth. When the limit column 1 enters the guide opening 23, the limit block 21 can be first stretched open. When the mushroom head on the upper part of the limit column 1 extends to the other side of the limit block 21, the limit column 1 can be clamped by the limit block 21 for engagement. In addition, the cooperation structure between the limit column 1 and the limit block 21 can also be in other forms. For example, a card slot can be provided on the limit column 1, and a snap ring can be provided on the limit block 21. The snap ring can cooperate with the card slot to relatively fix the limit column 1 and the limit block 21. As for the specific structural form of the limit column 1 and the limit block 21, as long as the relative fixation of the two can be achieved, the utility model does not make specific restrictions on this.
[0031] The guide rope 3 can be connected to the limit column 1, and the guide rope 3 can be connected to the limit column 1 and pass through the gap between the two limit blocks 21. When the limit column 1 and the limit assembly 2 move toward each other, the relative movement direction of the limit column 1 and the limit assembly 2 can be maintained in the direction of the guide rope 3, which can ensure that the gap between the two limit blocks 21 is always maintained on the moving trajectory of the limit column 1, and then the limit column 1 can be aligned and accurately guided to the gap between the two limit blocks 21, which can avoid the limit column 1 from deviating in movement and failing to accurately enter the gap between the two limit blocks 21, resulting in limit failure.
[0032] In this embodiment, the end of the limiting column 1 connected to the guide rope 3 may be formed with an outwardly protruding clamping portion 11, i.e., a structure similar to a mushroom head. The clamping portion 11 can pass through the gap between the two limiting blocks 21 and abut against the limiting blocks 21, thereby fixing the limiting column 1 and the limiting blocks 21 relative to each other. The gap between the two limiting blocks 21 can be expanded when the limiting column 1 enters. When the clamping portion 11 extends to the other side of the limiting block 21, the limiting block 21 can also be restored and fit against the outer wall of the limiting column 1, so that the clamping portion 11 can abut against the top of the limiting block 21, preventing the limiting column 1 from falling out of the limiting assembly 2.
[0033] Optionally, at least one of the two limit blocks 21 is provided with an elastic member 22, such as an elastic structure such as a spring or a shrapnel. When the limit column 1 enters the gap between the two limit blocks 21, the limit block 21 can compress the elastic member 22 to increase the distance between the two limit blocks 21. That is, the gap between the two limit blocks 21 can be stretched open under the action of the limit column 1. When the clamping portion 11 of the limit column 1 extends to the other side of the guide opening 23, the limit block 21 can also move toward the limit column 1 under the elastic force of the elastic member 22 and fit on the outer wall of the limit column 1, thereby clamping the limit column 1 between the two limit blocks 21, and the clamping portion 11 can also abut on the limit block 21, thereby realizing relative fixation between the limit block 21 and the limit column 1. The abutment between the clamping portion 11 and the limit block 21 can also prevent the limit column 1 from falling off from between the two limit blocks 21, thereby fixing the hook 5.
[0034] Optionally, the opening direction of the guide opening 23 can be toward the direction of the limit column 1. Specifically, the gap between the two limit blocks 21 can be in a conical or trumpet-shaped structure to form the guide opening 23, and the clamping portion 11 of the limit column 1 can also be in a trapezoidal or conical structure in its axial section. The structure of the clamping portion 11 can cooperate with the gap between the two limit blocks 21. When the limit column 1 comes to the gap between the two limit blocks 21, the mutual cooperation of the two structures can be utilized to accurately guide the limit column 1 to the center of the gap between the two limit blocks 21, so that the limit column 1 can accurately enter the gap between the two limit blocks 21. At the same time, the clamping portion 11 of the limit column 1 can also push the limit block 21 to move in the direction away from the limit column 1 and compress the elastic member 22 so that the gap between the two limit blocks 21 is stretched open, which is conducive to the limit column 1 entering the gap between the two limit blocks 21.
[0035] Optionally, the opening size of the guide opening 23 may be larger than the outer diameter size of the clamping portion 11, that is, the opening size between the two limit blocks 21 toward the limit column 1 may be larger than the maximum outer diameter size on the clamping portion 11. When the limit column 1 comes to the guide opening 23, a certain movement deviation of the limit column 1 may be allowed. As long as the clamping portion 11 is within the range of the opening size of the guide opening 23, the movement deviation of the limit column 1 can be automatically calibrated by utilizing the structural matching relationship between the clamping portion 11 and the limit block 21, which will not affect the entry of the limit column 1 from between the two limit blocks 21.
[0036] In this embodiment, a first hoisting mechanism 4 is provided at the other end of the guide rope 3 relative to the limit column 1. It can be understood that after the guide rope 3 is released by the first hoisting mechanism 4, it passes through the gap between the two limit blocks 21 and is then connected to the limit column 1. When the hook 5 moves up and down, the first hoisting mechanism 4 can release or tighten the guide rope 3 to keep the guide rope 3 straight at all times, so that the guide rope 3 can always maintain its guiding effect on the limit column 1, so that the limit column 1 can accurately enter the gap between the two limit blocks 21 for fixation.
[0037] Example 2
[0038] This embodiment provides a lifting device.
[0039] like Figure 1 and Figure 2 As shown in , the lifting device described in this embodiment may include the hook's anti-falling mechanism described in Example 1, and may also include a hook 5, a connecting seat 6 and a fixed seat 7, wherein the hook 5 is connected to the bottom of the connecting seat 6, and the fixed seat 7 is suspended above the connecting seat 6. Specifically, the fixed seat 7 can be connected to the crane's boom, and the wire rope 9 above the hook 5 can pass through the fixed seat 7 and be connected to the connecting seat 6.
[0040] In this embodiment, if Figure 1 As shown in the figure is the first structure of the lifting device, the lifting device may include two sets of the hook's anti-falling mechanism, specifically, the two limit columns 1 can be fixedly connected to the two sides of the connecting seat 6 and arranged opposite to each other, the two sets of limit components 2 are fixedly connected to the two sides of the fixing seat 7 and are respectively arranged corresponding to the two limit columns 1, and the two guide ropes 3 pass through the two sets of limit components 2 and are connected correspondingly to the two limit columns 1.
[0041] In this embodiment, if Figure 2As shown in the figure is the second structure of the lifting device, the lifting device may include two sets of the hook's anti-falling mechanism, specifically, the two limit columns 1 can be fixedly connected to the two sides of the fixing seat 7 and arranged opposite to each other, the two sets of limit components 2 are fixedly connected to the two sides of the connecting seat 6 and are respectively arranged corresponding to the two limit columns 1, and the two guide ropes 3 pass through the two sets of limit components 2 and are connected correspondingly to the two limit columns 1.
[0042] Example 3
[0043] This embodiment provides a crane.
[0044] The crane described in this embodiment may include the hook's anti-falling mechanism as described in Example 1 or the lifting device described in Example 2, and may also include a second hoisting mechanism (not shown in the figure), a boom (not shown in the figure) and a pulley group 8. The pulley group 8 and the second hoisting mechanism may be respectively arranged at both ends of the boom. Specifically, the pulley group 8 may be arranged at the free end of the boom, and the second hoisting mechanism may be arranged at the fixed end of the boom. That is to say, when the boom is raised, the pulley group 8 is located at the upper end of the boom, and the second hoisting mechanism is located at the lower end of the boom.
[0045] In this embodiment, the second hoisting mechanism and the hook 5 can be connected by a wire rope 9, and the wire rope 9 can pass around the pulley group 8. The lifting or lowering operation of the hook 5 can be performed by retracting or releasing the wire rope 9 by the second hoisting mechanism.
[0046] To sum up, the anti-falling mechanism of the hook of the utility model can be achieved by installing a limit column on the hook and installing a limit assembly above the limit column, so that the limit column can go up with the hook and be inserted between the two limit blocks in the limit assembly. The structural cooperation between the limit column and the limit block can be used to fix the hook, thereby preventing the hook from falling and forming a safety hazard. In addition, a guide rope is connected to the end of the limit column facing the limit assembly and passes through the limit assembly to accurately guide the limit column to the gap between the limit blocks, thereby avoiding deviation and inability to align causing limit failure.
[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A hook anti-fall mechanism, characterized in that: The invention comprises a limiting column (1), a limiting assembly (2) and a guide rope (3); the limiting column (1) or the limiting assembly (2) is installed on the hook (5); the limiting assembly (2) is arranged corresponding to the limiting column (1); the limiting assembly (2) comprises two limiting blocks (21) arranged opposite to each other; at least one of the two limiting blocks (21) is provided with an elastic member (22); the limiting column (1) can compress the elastic member (22) and be clamped between the two limiting blocks (21); the guide rope (3) passes through the gap between the limiting blocks (21) and is fixedly connected to the limiting column (1).
2. The hook anti-fall mechanism according to claim 1, characterized in that: An outwardly protruding clamping portion (11) is formed at the upper end of the limiting column (1), and the clamping portion (11) can pass through the gap between the limiting blocks (21) and abut against the limiting blocks (21) to fix the limiting column (1).
3. The hook anti-fall mechanism according to claim 2, characterized in that: A guide opening is formed between the two limiting blocks (21), and the opening direction of the guide opening faces the limiting column (1).
4. The hook anti-fall mechanism according to claim 3, characterized in that: The opening size of the guide port is larger than the outer diameter size of the clamping portion (11).
5. The hook anti-fall mechanism according to any one of claims 1 to 4, characterized in that: The other end of the guide rope (3) relative to the limiting column (1) is provided with a first hoisting mechanism (4).
6. A lifting device, characterized in that: The invention relates to a top-impact anti-fall mechanism comprising a hook (5), a connecting seat (6), a fixing seat (7) and the hook according to any one of claims 1 to 5, wherein the hook (5) is connected below the connecting seat (6) and the fixing seat (7) is suspended above the connecting seat (6).
7. The lifting device according to claim 6, characterized in that The invention comprises two groups of limiting columns (1), limiting components (2) and guide ropes (3); the two groups of limiting columns (1) are respectively fixedly connected to both sides of the connecting seat (6); the two groups of limiting components (2) are respectively fixedly connected to both sides of the fixing seat (7) and correspond one to one with the two groups of limiting columns (1); the two guide ropes (3) pass through the two groups of limiting components (2) and are respectively connected to the two groups of limiting columns (1).
8. The lifting device according to claim 6, characterized in that The invention comprises two groups of limiting columns (1), limiting components (2) and guide ropes (3); the two groups of limiting columns (1) are respectively fixedly connected to both sides of the fixing seat (7); the two groups of limiting components (2) are respectively fixedly connected to both sides of the connecting seat (6) and correspond one to one with the two groups of limiting columns (1); the two guide ropes (3) pass through the two groups of limiting components (2) and are respectively connected to the two groups of limiting columns (1).
9. A crane, characterized in that: The invention comprises the hook's anti-falling mechanism as described in any one of claims 1 to 5 or the lifting device as described in any one of claims 6 to 8, and also comprises a second hoisting mechanism, a lifting arm and a pulley block (8), wherein the pulley block (8) and the second hoisting mechanism are respectively arranged at both ends of the lifting arm.
10. The crane according to claim 9, characterized in that The second hoisting mechanism is connected to the hook (5) via a steel wire rope (9), and the steel wire rope (9) passes around the pulley block (8).