Platform crane auxiliary hook unloading structure and method

Abstract

This invention discloses a platform crane auxiliary hook stress-relieving structure and method, including a hook body comprising a bent hook portion, a first vertical portion, and a second vertical portion. The first and second vertical portions are welded and fixed to both ends of the bent hook portion. Two first vertical portions are provided, respectively located on the front and rear sides of one end of the bent hook portion. A connecting plate is welded and fixed to the top of both first vertical portions. This invention relates to the field of hook technology. This platform crane auxiliary hook stress-relieving structure and method, through the coordinated arrangement of the connecting plate, arc-shaped pad, threaded rod, linkage plate, reinforcing screw, limiting plate, and first spring, allows the hook body to rise after the plate-shaped load is placed in the bent hook portion. The arc-shaped pad can compress the linkage plate, which in turn compresses the first spring, achieving stress relief and effectively preventing the hook body from impacting and damaging the plate-shaped load.

Description

Technical Field

[0001] This invention relates to the field of hook technology, specifically to a platform crane auxiliary hook force-relieving structure and method. Background Technology

[0002] A crane auxiliary hook, also known as a secondary hook, is a hook used on lifting machinery to assist in lifting heavy objects. It typically consists of a hook body, hook tongue, hook body, and hook feet. Its main function is to assist in lifting heavy objects. In actual use, the crane auxiliary hook can help the operator better control the heavy object during the lifting process, ensuring the safety and stability of the lifting. For cranes, the main hook is the primary hook used, generally larger, with a higher lifting ratio, and a slower lifting speed. The main hook is mainly used for heavy crane work, while the auxiliary hook plays a supporting role. It is smaller and has a lower lifting ratio, and is generally used when lifting lighter loads, allowing for faster lifting. In addition, it can be used in conjunction with the main hook during operation.

[0003] Conventional auxiliary hooks have a fixed internal space, so when hoisting sheet materials, the materials usually need to be tied up before the auxiliary hook can be used for hoisting. This is inconvenient. In addition, conventional auxiliary hooks lack a force-relieving component during hoisting, and the direct rise of the auxiliary hook can easily cause impact damage to the hoisted object. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a platform crane auxiliary hook unloading structure and method, which solves the problems of conventional auxiliary hooks having fixed internal space, making them inconvenient to use when lifting plates, and the lack of unloading components in conventional auxiliary hooks during lifting, which can easily cause impact damage to the lifted object when the auxiliary hook rises directly.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a platform crane auxiliary hook unloading structure, comprising a hook body, the hook body comprising a bent hook portion, a first vertical portion, and a second vertical portion, the first vertical portion and the second vertical portion being welded and fixed to both ends of the bent hook portion, two first vertical portions being provided, respectively located on the front and rear sides of one end of the bent hook portion, the top ends of the two first vertical portions being welded and fixed with a connecting plate, a reinforcing screw being rotatably mounted on the left side of the bottom of the connecting plate via a bearing, a threaded rod being provided through the inside of the bent hook portion, an arc-shaped pad being fixedly connected to the top end of the threaded rod, and the outer arc surface of the arc-shaped pad being adapted to the inner arc surface of the bent hook portion, a linkage plate adapted to the threaded rod being sleeved and slidably mounted on the outer periphery of the reinforcing screw, and a limit plate being fixedly connected to the bottom end of the reinforcing screw, a first spring being sleeved on the outer periphery of the reinforcing screw, the two ends of the first spring being in contact with the opposite sides of the limit plate and the linkage plate, respectively.

[0006] The present invention is further configured such that: the threaded rod passes through the linkage plate, and two fastening nuts are sleeved on and threadedly connected to the outer surface of the threaded rod, and the two fastening nuts are respectively located on the upper and lower sides of the linkage plate.

[0007] The present invention is further configured such that: auxiliary positioning blocks are fixedly connected to the top of the linkage plate and to both the left and right sides of the threaded rod, and the top of the auxiliary positioning block is configured as an arc-shaped surface that matches the outer arc surface of the hook portion.

[0008] The present invention is further configured such that: lifting lugs are fixedly installed on both the front and rear sides of the top of the docking plate, and an inclined reinforcing plate is fixedly connected between the right side of the bottom of the docking plate and one side of the two first vertical parts.

[0009] The invention is further configured such that: one end of the hook portion is fixedly connected to a fixing screw, the fixing screw is disposed between the two first vertical portions, the top end of the fixing screw is fixedly connected to the bottom of the docking plate, an adjusting nut is sleeved and threadedly connected to the outer periphery of the fixing screw, a second spring is sleeved on the outer periphery of the fixing screw, and a pressure plate is sleeved and slidably installed on the outer periphery of the two first vertical portions, the fixing screw, and the reinforcing screw, respectively, and the two ends of the second spring are in contact with the adjusting nut and the opposite side of the pressure plate.

[0010] The present invention is further configured such that: a first movable hole is provided at the top of the first vertical part, a second movable hole is provided on both the front and rear sides of the top of the second vertical part, and a third movable hole is provided inside the hook part and on both the front and rear sides of the threaded rod, which communicates with the first movable hole and the second movable hole.

[0011] The present invention is further configured such that: an adjusting column is slidably installed inside the first moving hole, an expanding column is slidably installed inside the second moving hole, the adjusting column and the expanding column are connected by several universal joints, and the several universal joints are used in conjunction with the third moving hole, and the expanding column is disposed through the pressure plate.

[0012] The invention is further configured such that: a movable platform is sleeved on the outer periphery of the reinforcing screw and threadedly connected thereto; the movable platform is positioned above the pressure plate; vertical grooves communicating with the first movable holes are provided on the other side of the two first vertical parts; sliders adapted to the vertical grooves are fixedly installed on the front and rear sides of the right side of the movable platform; and the right side of the sliders is fixedly connected to the surface of the adjusting column.

[0013] The present invention is further configured such that a knob is sleeved and fixedly installed on the outer periphery of the reinforcing screw, and the knob is disposed between the pressure plate and the linkage plate.

[0014] This invention also discloses a method for unloading force using the auxiliary hook of a platform crane, specifically including the following steps:

[0015] Step 1, Assembly: After threading the lifting rope of the platform crane through the two lifting lugs and securing it, the auxiliary hook assembly is complete;

[0016] Step 2, Adjustment: When it is necessary to adjust the accommodating space of the hook, adjust the height of the extension column by turning the knob. The knob drives the reinforcing screw to rotate, the reinforcing screw drives the moving platform to move, and the moving platform drives the slider to move the adjustment column. The adjustment column drives the extension column to move through several universal joints. After the extension column moves to the required height, stop turning the knob.

[0017] Step 3, Locking and Adjusting: Rotate the adjusting nut to move it on the reinforcing screw until the pressure plate can move upward and disengage from the extension column, and the plate-shaped hoisting object can be inserted into the hook part. Then stop rotating the adjusting nut.

[0018] Step 4, Lifting: Pull the pressure plate upwards, the pressure plate squeezes the second spring. During this process, insert the plate-shaped object between the pressure plate and the hook until the plate-shaped object is placed in the hook. Release the pressure plate, the second spring extends and pushes the pressure plate onto the extension column. The platform crane pulls the lifting rope to raise the hook body. While the object is lifting, it squeezes the arc-shaped pad. The arc-shaped pad drives the threaded rod to descend. The threaded rod drives the fastening nut to lower the linkage plate. The linkage plate squeezes the first spring to relieve the lifting force.

[0019] This invention provides a structure and method for unloading force using an auxiliary hook of a platform crane. It has the following beneficial effects:

[0020] (1) The present invention uses a combination of a docking plate, an arc-shaped pad, a threaded rod, a linkage plate, a reinforcing screw, a limiting plate and a first spring. After the plate-shaped object is placed in the hook part, the hook body rises. The linkage plate can be squeezed by the arc-shaped pad to move, thereby squeezing the first spring. The first spring is used to relieve the force, effectively avoiding the impact damage of the hook body to the plate-shaped object.

[0021] (2) By setting two fastening nuts, the present invention ensures the stability of the connection between the threaded rod and the linkage plate, while providing a guarantee for the convenient separation between the threaded rod and the linkage plate, so that the arc-shaped pad can be easily replaced after wear.

[0022] (3) The present invention uses a combination of reinforced screw, knob, moving platform, slider, vertical groove, first moving hole, second moving hole, third moving hole, adjusting column, extension column and universal joint. The extension column can be adjusted by simply turning the knob, thereby adjusting the space of the hook part, which provides convenience for the hoisting of plate-shaped objects.

[0023] (4) By setting up a fixed screw, adjusting nut, second spring and pressure plate, the present invention can effectively block the space of the hook part and prevent the hoisted object from falling suddenly. At the same time, the second spring can relieve the force of the hoisted object and further ensure the safety of the hoisted object during the hoisting process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the first movable hole, the second movable hole, and the third movable hole of the present invention;

[0026] Figure 3 This is a schematic diagram showing the connection between the hook portion and the fixed lead screw structure of the present invention;

[0027] Figure 4 This is a right view of the structure of the present invention;

[0028] Figure 5 This is a left view of the structure of the present invention;

[0029] In the diagram, 1. Hook body; 2. Hook section; 3. First vertical section; 4. Second vertical section; 5. Connecting plate; 6. Reinforcing screw; 7. Threaded rod; 8. Arc-shaped pad; 9. Linkage plate; 10. Limiting plate; 11. First spring; 12. Fastening nut; 13. Auxiliary positioning block; 14. Lifting lug; 15. Inclined reinforcing plate; 16. Fixed screw; 17. Adjusting nut; 18. Second spring; 19. Pressure plate; 20. First moving hole; 21. Second moving hole; 22. Third moving hole; 23. Adjusting column; 24. Extension column; 25. Universal joint; 26. Moving platform; 27. Vertical groove; 28. Slider; 29. ​​Knob. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Please see Figure 1-5 The present invention provides the following two technical solutions: Example 1

[0032] The platform crane auxiliary hook unloading structure includes a hook body 1 composed of a hook part 2, two first vertical parts 3 and a second vertical part 4. The first vertical parts 3 and the second vertical parts 4 are welded and fixed to both ends of the hook part 2, and the two first vertical parts 3 are respectively arranged on the front and rear sides of one end of the hook part 2.

[0033] As a preferred option, in order to facilitate hoisting and ensure the strength of the structure, the top ends of the two first vertical parts 3 are welded together with a connecting plate 5. Lifting lugs 14 are fixedly installed on both the front and rear sides of the top of the connecting plate 5. An inclined reinforcing plate 15 is fixedly connected between the right side of the bottom of the connecting plate 5 and one side of the two first vertical parts 3.

[0034] As a preferred embodiment, in order to achieve force relief and buffering of the hoisted object, a reinforcing screw rod 6 is rotatably installed on the left side of the bottom of the docking plate 5 via a bearing. A threaded rod 7 is installed through the inside of the hook part 2. An arc-shaped pad 8 is fixedly connected to the top of the threaded rod 7, and the outer arc surface of the arc-shaped pad 8 is adapted to the inner arc surface of the hook part 2. A linkage plate 9 adapted to the threaded rod 7 is sleeved and slidably installed on the outer periphery of the reinforcing screw rod 6. A limit plate 10 is fixedly connected to the bottom end of the reinforcing screw rod 6. A first spring 11 is sleeved on the outer periphery of the reinforcing screw rod 6. The two ends of the first spring 11 are in contact with the opposite sides of the limit plate 10 and the linkage plate 9, respectively.

[0035] As a detailed explanation, in order to facilitate the separation between the threaded rod 7 and the linkage plate 9, the threaded rod 7 is installed through the linkage plate 9, and two fastening nuts 12 are fitted and threaded onto the outer surface of the threaded rod 7, and the two fastening nuts 12 are respectively located on the upper and lower sides of the linkage plate 9.

[0036] As a preferred embodiment, in order to ensure the stability of the position of the linkage plate 9 and to improve the structural reinforcement of the hook part 2, auxiliary positioning blocks 13 are fixedly connected to the top of the linkage plate 9 and on both sides of the threaded rod 7. The top of the auxiliary positioning block 13 is set as an arc surface that matches the outer arc surface of the hook part 2.

[0037] As a preferred embodiment, in order to ensure that the hoisted object does not easily detach from the hook body 1 during the hoisting process, a fixing screw 16 is fixedly connected to one end of the hook part 2. The fixing screw 16 is set between the two first vertical parts 3. The top end of the fixing screw 16 is fixedly connected to the bottom of the docking plate 5. An adjusting nut 17 is sleeved and threadedly connected to the outer periphery of the fixing screw 16. A second spring 18 is sleeved on the outer periphery of the fixing screw 16. A pressure plate 19 is sleeved and slidably installed on the outer periphery of the two first vertical parts 3, the fixing screw 16 and the reinforcing screw 6. The two ends of the second spring 18 are in contact with the adjusting nut 17 and the opposite side of the pressure plate 19, respectively.

[0038] In this embodiment, not only can the force relief of the hoisted object be buffered during the hoisting process, but the purpose of preventing the hoisted object from easily separating from the hook body 1 during the hoisting process can also be achieved. Example 2

[0039] As an improvement on the previous embodiment, this embodiment of the platform crane auxiliary hook unloading structure further includes a first movable hole 20 opened at the top of the first vertical part 3. An adjusting column 23 is slidably installed inside the first movable hole 20. Second movable holes 21 are opened on both the front and rear sides of the top of the second vertical part 4. An extension column 24 is slidably installed inside the second movable hole 21. The extension column 24 is set through the pressure plate 19. Third movable holes 22 are opened inside the hook part 2 and on both the front and rear sides of the threaded rod 7, which communicate with the first movable hole 20 and the second movable hole 21. The adjusting column 23 and the extension column 24 are connected by several universal joints 25, and the several universal joints 25 are used in conjunction with the third movable hole 22.

[0040] As a preferred embodiment, in order to facilitate the adjustment of the height of the extension column 24, a movable platform 26 is fitted around the outer periphery of the reinforcing screw 6 and threadedly connected. The movable platform 26 is positioned above the pressure plate 19. Vertical grooves 27 communicating with the first movable holes 20 are opened on the other side of the two first vertical parts 3. Slider blocks 28 that are compatible with the vertical grooves 27 are fixedly installed on the front and rear sides of the right side of the movable platform 26, and the right side of the slider 28 is fixedly connected to the surface of the adjustment column 23.

[0041] As a preferred option, in order to achieve convenient rotation drive of the reinforcing screw 6, a knob 29 is sleeved and fixedly installed on the outer periphery of the reinforcing screw 6, and the knob 29 is located between the pressure plate 19 and the linkage plate 9.

[0042] The advantage of Embodiment 2 over Embodiment 1 is that by adjusting the height of the extension column 24, the space enclosed by the hook part 2, the first vertical part 3, the second vertical part 4 and the pressure plate 19 is ensured that when the height of the pressure plate 19 is adjusted, there will be no gap between the pressure plate 19 and the second vertical part 4, which would cause the hoisted object to fall off easily. That is, by adjusting the height of the extension column 24, the gap between the pressure plate 19 and the second vertical part 4 is filled, ensuring the effective adjustment of the space inside the hook body 1.

[0043] The platform crane auxiliary hook unloading method specifically includes the following steps:

[0044] Step 1, Assembly: After passing the lifting rope of the platform crane through the two lifting lugs 14 and securing it, the auxiliary hook assembly is completed;

[0045] Step 2, Adjustment: When it is necessary to adjust the accommodating space of the hook part 2, adjust the height of the extension column 24 by turning the knob 29. The knob 29 drives the reinforcing screw 6 to rotate, the reinforcing screw 6 drives the moving platform 26 to move, the moving platform 26 drives the slider 28 to move the adjusting column 23, and the adjusting column 23 drives the extension column 24 to move through several universal joints 25. After the extension column 24 moves to the required height, stop turning the knob 29.

[0046] Step 3, Locking and Adjustment: Rotate the adjusting nut 17 to move the adjusting nut 17 on the reinforcing screw 6 until the pressure plate 19 can move upward and disengage from the extension column 24, and the plate-shaped hoisting object can be inserted into the hook part 2, then stop rotating the adjusting nut 17.

[0047] Step 4, hoisting: Pull the pressure plate 19 upwards. The pressure plate 19 compresses the second spring 18. During this process, insert the plate-shaped object to be hoisted between the pressure plate 19 and the hook part 2 until the plate-shaped object is placed in the hook part 2. Release the pressure plate 19. The second spring 18 extends and pushes the pressure plate 19 onto the extension column 24. As the platform crane pulls the hoisting rope to raise the hook body 1, the object to be hoisted compresses the arc-shaped pad 8. The arc-shaped pad 8 drives the threaded rod 7 to descend. The threaded rod 7 drives the fastening nut 12 to lower the linkage plate 9. The linkage plate 9 compresses the first spring 11 to relieve the hoisting force.

Claims

1. A platform crane auxiliary hook unloading structure, comprising a hook body (1), characterized in that: The hook body (1) includes a hook portion (2), a first vertical portion (3), and a second vertical portion (4). The first vertical portion (3) and the second vertical portion (4) are welded and fixed to both ends of the hook portion (2). There are two first vertical portions (3), which are respectively located on the front and rear sides of one end of the hook portion (2). The top ends of the two first vertical portions (3) are welded and fixed with a connecting plate (5). A reinforcing screw (6) is rotatably installed on the left side of the bottom of the connecting plate (5) through a bearing. A through-hole is provided inside the hook portion (2). The threaded rod (7) has an arc-shaped pad (8) fixedly connected to its top end, and the outer arc surface of the arc-shaped pad (8) is adapted to the inner arc surface of the hook part (2). The reinforcing screw (6) is sleeved and slidably installed with a linkage plate (9) adapted to the threaded rod (7). The bottom end of the reinforcing screw (6) is fixedly connected to a limit plate (10). The reinforcing screw (6) is sleeved with a first spring (11), and the two ends of the first spring (11) are in contact with the opposite side of the limit plate (10) and the linkage plate (9), respectively. One end of the hook part (2) is fixedly connected to a fixing screw (16). The fixing screw (16) is set between the two first vertical parts (3). The top end of the fixing screw (16) is fixedly connected to the bottom of the docking plate (5). An adjusting nut (17) is sleeved and threadedly connected to the outer periphery of the fixing screw (16). A second spring (18) is sleeved on the outer periphery of the fixing screw (16). A pressure plate (19) is sleeved and slidably installed on the outer periphery of the two first vertical parts (3), the fixing screw (16) and the reinforcing screw (6). The two ends of the second spring (18) are in contact with the adjusting nut (17) and the opposite side of the pressure plate (19) respectively. The top of the first vertical part (3) is provided with a first moving hole (20), the front and rear sides of the top of the second vertical part (4) are provided with second moving holes (21), and the inside of the hook part (2) and the front and rear sides of the threaded rod (7) are provided with a third moving hole (22) that communicates with the first moving hole (20) and the second moving hole (21). An adjusting column (23) is slidably installed inside the first moving hole (20), and an extension column (24) is slidably installed inside the second moving hole (21). The adjusting column (23) and the extension column (24) are connected by several universal joints (25), and the several universal joints (25) are used in conjunction with the third moving hole (22). The extension column (24) is set through the pressure plate (19). The reinforcing screw (6) is fitted with a movable platform (26) and threadedly connected to the outer periphery. The movable platform (26) is located above the pressure plate (19). The other side of the two first vertical parts (3) is provided with a vertical groove (27) that communicates with the first movable hole (20). The front and rear sides of the right side of the movable platform (26) are fixedly installed with sliders (28) that are compatible with the vertical grooves (27), and the right side of the sliders (28) is fixedly connected to the surface of the adjusting column (23).

2. The platform crane auxiliary hook force-relieving structure according to claim 1, characterized in that: The threaded rod (7) is installed through the linkage plate (9). Two fastening nuts (12) are fitted and threaded onto the outer surface of the threaded rod (7), and the two fastening nuts (12) are respectively installed on the upper and lower sides of the linkage plate (9).

3. The platform crane auxiliary hook force-relieving structure according to claim 2, characterized in that: Auxiliary positioning blocks (13) are fixedly connected to the top of the linkage plate (9) and on both sides of the threaded rod (7). The top of the auxiliary positioning block (13) is set as an arc surface that matches the outer arc surface of the hook part (2).

4. The platform crane auxiliary hook force-relieving structure according to claim 3, characterized in that: Lifting lugs (14) are fixedly installed on both the front and rear sides of the top of the docking plate (5), and an inclined reinforcing plate (15) is fixedly connected between the right side of the bottom of the docking plate (5) and one side of the two first vertical parts (3).

5. The platform crane auxiliary hook force-relieving structure according to claim 4, characterized in that: A knob (29) is fitted and fixedly installed on the outer periphery of the reinforcing screw (6), and the knob (29) is located between the pressure plate (19) and the linkage plate (9).

6. A method for unloading force using the platform crane auxiliary hook unloading structure according to claim 5, characterized in that: Specifically, the following steps are included: Step 1, Assembly: After passing the lifting rope of the platform crane through the two lifting lugs (14) and fixing it, the auxiliary hook assembly is completed; Step 2, Adjustment: When it is necessary to adjust the accommodating space of the hook part (2), adjust the height of the extension column (24) by turning the knob (29). The knob (29) drives the reinforcing screw (6) to rotate, and the reinforcing screw (6) drives the moving platform (26) to move. The moving platform (26) drives the slider (28) to move the adjusting column (23). The adjusting column (23) drives the extension column (24) to move through several universal joints (25). After the extension column (24) moves to the required height, stop turning the knob (29). Step 3, Locking and Adjustment: Rotate the adjusting nut (17) to move the adjusting nut (17) on the fixed screw (16) until the pressure plate (19) can move upward and disengage from the extension column (24) and the plate-shaped hoisting object can be inserted into the hook part (2), then stop rotating the adjusting nut (17). Step 4, hoisting: Pull the pressure plate (19) upward, the pressure plate (19) squeezes the second spring (18). During the process, insert the plate-shaped hoisting object between the pressure plate (19) and the hook part (2) until the plate-shaped hoisting object is placed in the hook part (2). Release the pressure plate (19), the second spring (18) extends and pushes the pressure plate (19) onto the extension column (24). The platform crane pulls the hoisting rope to raise the hook body (1). During the process, the hoisting object squeezes the arc-shaped pad (8). The arc-shaped pad (8) drives the threaded rod (7) to descend. The threaded rod (7) drives the fastening nut (12) to lower the linkage plate (9). The linkage plate (9) squeezes the first spring (11) to perform hoisting and unloading.

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