C-shaped lifting appliance for stable lifting
By designing a stable lifting device with a combination of hook body, swing plate, tension spring, and elastic components, the problem of C-hook swaying in the initial stage of lifting was solved, enabling rapid alignment and safe lifting, thus improving lifting efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CAOFEIDIAN PORT WEST PORT TERMINAL CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-19
AI Technical Summary
C-hooks are prone to swaying in the initial stages of lifting steel coils, making alignment difficult, reducing lifting efficiency, increasing labor intensity, and posing a risk of the steel coil falling off.
A C-type lifting device was designed, including a hook, a swing plate, a tension spring, and an elastic element. Through the cooperation between the hook and the steel coil, the stability of the initial lifting stage is achieved by using the self-weight guidance and elastic abutment mechanism of the steel coil. The swing plate automatically adapts to lateral displacement when tilted and reset. The pressure element and the guide protrusion form a two-way constraint to ensure that the hook and the steel coil are aligned.
It significantly improves hoisting efficiency, reduces alignment time, lowers the risk of poor contact, ensures hoisting safety, and adapts to the stability of different steel coil specifications and complex working conditions.
Smart Images
Figure CN224258094U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting and hoisting equipment technology, specifically to a C-type lifting tool for stable hoisting. Background Technology
[0002] In modern industrial production, the handling and hoisting of steel coils are extremely common. C-hooks are widely used by steel companies, logistics warehouses, and steel coil processing plants for steel coil hoisting due to their ease of use, and are usually operated with the aid of hoisting equipment.
[0003] However, problems frequently arise in the initial stages of steel coil hoisting, specifically when the C-hook is aligned and in contact with the coil. Due to unstable start-up of the hoisting equipment, wind interference at the site, and slight deviations in operator movements, the C-hook is prone to swaying. This makes it difficult for the C-hook to quickly and accurately align with the steel coil, requiring operators to spend a significant amount of time adjusting its position and posture, drastically reducing hoisting efficiency and increasing labor intensity. Furthermore, the alignment difficulties caused by the swaying C-hook can lead to poor contact, posing a risk of the steel coil falling off during subsequent hoisting, seriously endangering the lives of on-site personnel and the safety of company property. Therefore, developing a balanced structure that prevents the C-hook from swaying during the initial hoisting stage and ensures smooth alignment and contact with the steel coil has become an urgent technical challenge. Utility Model Content
[0004] To overcome the above-mentioned defects, this utility model provides a C-type lifting tool for stable hoisting, which solves the technical problem in the prior art where the C-type hook sways in the early stage of hoisting steel coils, resulting in difficulty in alignment, reduced efficiency, increased labor intensity, and the risk of steel coil falling off.
[0005] According to one aspect, at least one embodiment of the present invention provides a C-type lifting device for stable hoisting, used to maintain stability when a C-hook is hoisting a cylindrical steel coil, comprising:
[0006] The hook body has an upper beam, a connecting part and a lower beam connected in sequence. The lower beam is used to insert into the center hole of the steel coil and support the steel coil during hoisting. The upper beam, the connecting part and the lower beam together form a C-shaped groove with a side opening. The C-shaped groove is used to accommodate the coil wall of the steel coil.
[0007] A swing plate is oscillatingly mounted on the lower beam. After the coil wall enters the C-shaped groove, the swing plate slides against the inner wall of the coil and is oscillating due to the coil, so that the lower beam can enter the center hole of the coil under the guidance of the inner wall of the coil. The reset state of the swing plate is an inclined state, with the inclined direction facing the opening direction of the C-shaped groove.
[0008] A first tension spring, one end of which acts on the swing plate and the other end of which acts on the lower beam, is used to provide a force to pull the swing plate to swing back to its original position.
[0009] For example, at least one embodiment of this disclosure provides a C-type lifting device for stable hoisting, wherein the swing plate has a first slot, and the lower beam is provided with a first limiting slot, the first limiting slot being located above the first slot, and the swing plate is configured to swing such that the first slot accommodates or deaccompanies the first limiting slot.
[0010] For example, at least one embodiment of this disclosure provides a C-type lifting device for stable hoisting, wherein the lower beam is provided with a first slider that is slidably raised and lowered, and the swing plate is swayingly disposed on the first slider, and further includes:
[0011] The first elastic element has one end acting on the lower beam and the other end acting on the first slider, which elastically pushes the first slider and then drives the swing plate to move upward into the C-shaped groove.
[0012] For example, at least one embodiment of this disclosure provides a C-type lifting device for stable hoisting, wherein the lower beam has a second slot located below the first slider and opening upwards, and the swinging plate is further provided with a second limiting slot at its swing axis, and two locking edges are symmetrically provided on both sides of the second limiting slot. After the swinging plate swings, the two locking edges are parallel to the two side walls of the second slot, thereby allowing the swinging plate to move downwards and drive the second limiting slot to engage with the second slot.
[0013] For example, at least one embodiment of this disclosure provides a C-shaped lifting device for stable hoisting, wherein the first slider, the swing plate, the first elastic member, and the first tension spring together form a guide assembly, the guide assemblies are arranged in pairs, and the two sets of guide assemblies are respectively located on the left and right sides of the C-shaped groove.
[0014] For example, at least one embodiment of this disclosure provides a C-shaped lifting device for stable hoisting, wherein the hook body further has an upper beam portion, the upper beam portion and the lower beam portion are located on the upper and lower sides of the C-shaped groove, the side wall of the upper beam portion is provided with guide protrusions, and further includes:
[0015] A pressing component, the pressing component having a sliding section and a pressing section, the sliding section being perpendicular to the pressing section, the sliding section having a strip-shaped guide groove with a width matching the diameter of the guide protrusion, for the sliding section to allow the pressing component to swing and slide up and down under the sliding cooperation of the strip-shaped guide groove and the guide protrusion;
[0016] When the pressure member is in the reset state, it is in an inclined state, and the inclined direction is towards the opening direction of the C-shaped groove. The pressure member has two vertical parts for sliding contact with the outer wall edge of the steel coil, and is configured to be driven by the steel coil to swing until the top pressure section is in a horizontal state, at which point the top pressure section slides against the outer wall of the steel coil, and the relative sliding direction is parallel to the axis of the steel coil.
[0017] For example, at least one embodiment of this disclosure provides a C-type lifting device for stable hoisting, which further includes:
[0018] The second elastic element has one end acting on the guide protrusion and the other end acting on the bottom wall of the strip guide groove, and is used to provide the pressure member with a force that elastically pushes the steel coil toward the swing plate.
[0019] For example, at least one embodiment of this disclosure provides a C-type lifting device for stable hoisting, which further includes:
[0020] The second tension spring has one end acting on the upper beam and the other end acting on the pressure member, and is used to provide the force for the pressure member to swing and reset.
[0021] For example, at least one embodiment of this disclosure provides a C-shaped lifting device for stable hoisting, wherein the guide protrusion, the pressure member, the second elastic member and the second tension spring together form a top-pressure assembly, the top-pressure assemblies are arranged in pairs, and the two sets of top-pressure assemblies are symmetrically arranged on the left and right sides of the C-shaped groove.
[0022] For example, at least one embodiment of this disclosure provides a C-shaped lifting device for stable hoisting, wherein both the upper beam and the lower beam are provided with guide chamfers, and the two guide chamfers are respectively located on the upper and lower sides of the opening of the C-shaped groove.
[0023] The beneficial effects of the embodiments of this utility model are as follows:
[0024] In this invention, the tilted reset state of the swing plate ensures that it makes initial contact with the steel coil as it enters the C-groove, converting the coil's positional deviation into angular adjustment of the swing plate, eliminating the need for frequent manual calibration of the hook's position. Compared to traditional C-hooks that rely on visual alignment by operators, this structure automatically adapts to the lateral offset of the C-hook, shortening alignment time and significantly improving lifting efficiency. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.
[0026] Figure 1 This is a structural schematic diagram of a C-type lifting device for stable hoisting in one embodiment of the present invention;
[0027] Figure 2 for Figure 1 A partially enlarged structural diagram of section A in the middle;
[0028] Figure 3 for Figure 1 A partially enlarged structural diagram of section B in the middle;
[0029] Figure 4 for Figure 1 A partially enlarged structural diagram of section C in the middle;
[0030] In the diagram: Hook-1, C-groove-101, Lower beam-102, First limiting latch-103, Second latch-104, Upper beam-105, Guide protrusion-106, Connecting part-107, Guide chamfer-111, First slider-2, Guide assembly-200, Swing plate-3, First latch-301, Second limiting latch-302, Clamping edge-303, First elastic element-4, First tension spring-5, Second elastic element-6, Second tension spring-7, Top pressing assembly-700, Pressing element-8, Sliding section-801, Top pressing section-802, Strip guide groove-803. Detailed Implementation
[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.
[0032] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0033] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0035] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0036] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0037] like Figures 1-4 As shown, it illustrates a C-type lifting device for stable hoisting in one embodiment of the present invention, used to achieve stable hoisting of a cylindrical steel coil lying flat with its axis parallel to the ground. Its core lies in the coordinated cooperation of the hook body 1, the first slider 2, the swing plate 3 and the first elastic member 4, using the steel coil's own weight guidance and elastic abutment mechanism to solve the swaying problem in the initial stage of hoisting.
[0038] The hook body 1 is composed of an upper beam 105, a connecting part 107, and a lower beam 102 connected in sequence, forming a C-shaped groove 101 with a horizontal opening on the side. The opening direction is parallel to the axial direction of the steel coil, and the steel coil is placed horizontally. The lower beam 102 is located at the bottom of the C-shaped groove 101, and its end shape is adapted to the center hole of the steel coil for insertion into the center hole and supporting the steel coil. The upper beam 105 is parallel to the lower beam 102 and forms a C-shaped closed loop through the connecting part 107. The C-shaped groove 101 is used to accommodate the steel coil wall. The swing plate 3 is oscillatingly mounted on the upper surface of the lower beam 102 via a hinge shaft, and the axis of the hinge shaft is parallel to the axial direction of the steel coil. In the reset state, the swing plate 3 is tilted towards the opening direction of the C-shaped groove 101 at an angle of 15°-30°, so that the free end of the swing plate 3 extends towards the opening direction, ensuring that the steel coil wall contacts the swing plate 3 first when entering the C-shaped groove 101.
[0039] One end of the first tension spring 5 is connected to the free end of the swing plate 3, and the other end is fixed to the outer wall of the lower beam 102. Its natural tension keeps the swing plate 3 in a tilted, reset state and provides reset power during the swinging process. The operator manipulates the hoisting equipment to move the hook 1 to the side of the steel coil, aligning the opening of the C-groove 101 with the coil. At this time, the swing plate 3 tilts towards the opening under the action of the first tension spring 5, with its free end positioned at the inner front edge of the C-groove 101, ready for contact. As the hook 1 approaches horizontally, the coil wall enters through the opening of the C-groove 101, first contacting the tilted swing plate 3. Due to the large mass and relatively stable position of the steel coil, the swing plate 3 is subjected to radial pressure from the inner wall of the coil, causing it to swing around the hinge axis inside the C-groove 101, while simultaneously stretching the first tension spring 5. The swing trajectory of the swing plate 3 is guided by the inner wall of the coil, forcing the axis of the lower beam 102 to gradually align with the axis of the center hole of the steel coil. As the hook 1 continues to approach until the lower beam 102 aligns with the center hole, the swing plate 3 swings to a near-horizontal state, guiding the lower beam 102 to smoothly insert into the center hole of the steel coil, completing the support and positioning. After the steel coil is unloaded, the contraction force of the first tension spring 5 pulls the swing plate 3 back to the opening direction, restoring it to its initial tilted state, preparing it for the next lifting cycle.
[0040] The tilted reset state of the swing plate 3 ensures that it makes initial contact when the steel coil enters the C-groove 101, converting the positional deviation of the steel coil into angular adjustment of the swing plate 3, eliminating the need for frequent manual calibration of the hook 1. Compared to traditional C-hooks that rely on visual alignment by operators, this structure automatically adapts to the lateral offset of the C-hook, shortening alignment time and significantly improving lifting efficiency. The tension of the first tension spring 5 ensures that the swing plate 3 maintains continuous contact with the steel coil during the contact process. Even if the steel coil sways slightly due to equipment vibration or wind, the elastic deformation of the tension spring can drive the swing plate 3 to adjust accordingly, avoiding contact failure. This effectively suppresses the lateral swaying of the hook 1, reducing the risk of poor contact in the early stages of lifting. The swing plate 3 and the lower beam 102 form a dual constraint of "inner wall contact guidance and central hole support": the swing plate 3 restricts radial displacement through sliding contact with the inner wall of the steel coil, while the lower beam 102 provides axial support by inserting into the central hole. The combination of these two elements constructs a stable mechanical support system. Compared to the traditional C-hook method that relies solely on peripheral friction for support, this structure can effectively suppress circumferential sliding and axial movement of the steel coil during lifting, reducing the risk of detachment and ensuring lifting safety from a structural design perspective.
[0041] In some examples, the side of the swing plate 3 near the hinge fulcrum is provided with a first slot 301. This slot is an arc-shaped groove, the center of which is concentric with the hinge axis of the swing plate 3, and the arc length of the groove corresponds to the preset maximum swing angle. The upper surface of the lower beam 102 is provided with a first limiting part 103 that matches the first slot 301 along the swing trajectory of the swing plate 3. This limiting part is a columnar protrusion, the height of which matches the depth of the slot, and the cross-sectional shape of which matches the contour of the slot groove.
[0042] During hoisting, when the swing plate 3 swings downward under the pressure of the inner wall of the steel coil, the first slot 301 rotates around the hinge axis with the swing plate 3. When the swing angle reaches the design threshold, i.e., the axis of the lower beam 102 is aligned with the axis of the center hole of the steel coil, the first limiting slot 103 is precisely engaged in the groove of the first slot 301, forming a limiting fit and preventing the swing plate 3 from swinging downward further. At this time, the working surface of the swing plate 3 maintains stable contact with the inner wall of the steel coil, and the lower beam 102 is precisely inserted along the axis of the center hole of the steel coil under the guidance of the first slider 2. After the steel coil is unloaded, the elastic force of the first elastic element 4 drives the first slider 2 to move upward, causing the swing plate 3 to swing upward, and the first limiting slot 103 disengages from the first slot 301, allowing the swing plate 3 to return to its initial swingable state. By setting the slot and the limiting card, the maximum swing angle of the swing plate 3 is limited to the critical position of the alignment of the center hole of the steel coil, so as to avoid excessive swing after the lower beam 102 is inserted due to excessive swing, and to ensure the alignment accuracy between the hook body 1 and the steel coil. This solves the technical problem of unrestrained swing of the swing plate 3 in the traditional structure.
[0043] In some examples, the swing plate 3 is connected to the first slider 2 via a hinge shaft. In its reset state, it naturally tilts towards the opening of the C-shaped groove 101, forming a preset tilt angle of 15°-30° with the upper surface of the lower beam 102, so that the free end of the swing plate 3 extends towards the opening side of the C-shaped groove 101. One end of the first tension spring 5 is fixed to the end of the swing plate 3 away from the hinge shaft, and the other end is fixed to the side wall of the lower beam 102 near the opening of the C-shaped groove 101. Its tension direction is consistent with the tilt direction of the swing plate 3, and it is used to provide a pulling force to push the swing plate 3 back towards the opening direction.
[0044] During hoisting operations, when the steel coil wall enters the C-shaped groove 101 and presses against the free end of the swing plate 3, the swing plate 3 overcomes the tension of the first tension spring 5 and swings inward toward the C-shaped groove 101. The tension spring is stretched and stores elastic potential energy, while simultaneously driving the first slider 2 to slide along the lower beam 102. After the steel coil is unloaded, the first elastic element 4 pushes the first slider 2 upward, while the first tension spring 5 contracts. The combined effect of these two forces causes the swing plate 3 to quickly return to its initial tilted state, preparing for the next hoisting operation. This tilted design allows the swing plate 3 to preferentially contact the inner wall of the steel coil with its tilted free end when the hook 1 approaches the steel coil, using the inclined plane guiding principle to guide the hook 1 to align with the center hole of the steel coil.
[0045] The tilted state of the swing plate 3 allows it to naturally form a guide slope after resetting. When the hook 1 approaches the steel coil, the free end of the swing plate 3 can contact the inner wall of the steel coil first. Without the operator needing to deliberately adjust the angle, the hook 1 is guided directly by the sliding contact of the tilted surface, shortening the initial contact time during alignment and improving lifting efficiency. The resetting tension provided by the first tension spring 5 works in conjunction with the pushing force of the first elastic element 4. During the swinging process of the swing plate 3, the tension of the spring ensures continuous contact with the inner wall of the steel coil, preventing contact loss due to slight shaking of the steel coil. During resetting, the contraction force of the spring and the pushing force of the elastic element work together to quickly return the swing plate 3 to the preset tilted position, reducing idle time and adapting to the needs of high-frequency lifting operations. The tilt reset state limits the initial position of the swing plate 3 through geometric design. Combined with the tension constraint of the tension spring, it avoids irregular swaying under the vibration of the hoisting equipment or the action of wind, ensuring the consistency of each alignment process. From the structural level, it eliminates the risk of alignment failure caused by the position deviation of the swing plate 3 and improves the reliability of the system.
[0046] In some examples, a second slot 104 is formed horizontally on the upper surface of the lower beam 102, located directly below the first slider 2, with its opening facing upwards and its inner side walls perpendicular to the length of the lower beam 102. A second limiting slot 302 is fixedly connected to the hinge shaft of the swing plate 3, with symmetrically arranged locking edges 303 on both sides parallel to the side walls of the second slot 104. The width of the locking edges 303 is slightly smaller than the width of the slot, forming a guide gap. During hoisting, when the coil wall enters the C-shaped groove 101 and presses against the free end of the swing plate 3, the swing plate 3 swings downwards around the hinge shaft, causing the first slider 2 to slide down along the lower beam 102. When the coil is completely pressed onto the lower beam 102, the swing plate 3 swings to a horizontal state, at which point the locking edges 303 are precisely aligned with the second slot 104 and are fully engaged in the slot as the first slider 2 continues to move downwards. The locking edge 303 fits tightly against the two side walls of the second locking groove 104, forming a rigid limit in the horizontal direction, completely restricting the left and right swing of the swing plate 3. When the steel coil needs to be unloaded, the lifting equipment lifts the hook 1. After the weight of the steel coil is removed, the elastic force of the first elastic element 4 pushes the first slider 2 to return to its original position, causing the swing plate 3 to swing upward around the hinge axis. The second limiting locking part 302 disengages from the second locking groove 104, allowing the swing plate 3 to return to its initial swingable state, preparing it for the next lifting operation.
[0047] The locking process is automatically triggered as the steel coil is pressed down, requiring no additional operation. The parallel guiding design of the locking edge 303 and the side wall of the locking groove ensures precise locking. During reset, the elastic force of the first elastic element 4 enables automatic unlocking, balancing stability during hoisting and convenience during unloading. When the steel coil is pressed onto the lower beam 102, the swing plate 3 remains horizontal through the locking edge 303 and the second locking groove 104, completely restricting its swing freedom and preventing the swing plate 3 from shaking due to vibration or impact during hoisting. This allows the weight of the steel coil to be directly transferred to the lower beam 102 through the swing plate 3, forming a stable rigid support structure.
[0048] In some examples, the left and right swing plates 3 simultaneously contact the inner wall of the steel coil, using symmetrical arc-shaped working surfaces to convert the radial pressure of the steel coil into a balanced guiding force. This forces the lower beam 102 to precisely insert along the axis of the steel coil's central hole, effectively eliminating the hook body deflection problem that may occur with traditional single-sided guidance. This eliminates the need for operator adjustments during the alignment process, significantly improving lifting efficiency and accuracy. Regardless of changes in the steel coil diameter, the two guide components 200 automatically adapt to the curvature of the inner wall of the steel coil through symmetrical swinging, maintaining equidistant contact and ensuring the lifting stability of steel coils of different specifications. Under wind interference or equipment vibration conditions, the symmetrically arranged elastic elements and tension springs form an anti-sway damping system, effectively suppressing the lateral vibration of the hook body and reducing the sway amplitude in the initial stage of lifting.
[0049] In some examples, the upper beam 105 of the hook 1 is located above the C-shaped groove 101, forming a symmetrical support frame with the lower beam 102. A guide post 106 is fixedly installed on its outer wall. The post extends horizontally and its axis is parallel to the axis of the steel coil. The pressing member 8 consists of a sliding section 801 and a pressing section 802 connected vertically. The sliding section 801 has a strip-shaped guide groove 803. The groove width matches the diameter of the guide post 106, allowing the pressing member 8 to slide along the axial direction of the guide post 106 and swing around it. The pressing section 802 is a flat plate structure. In the reset state, it tilts to the outside of the C-shaped groove 101, i.e., in the opposite direction of the opening, which is opposite to the tilting direction of the swing plate 3 on the side of the lower beam 102, forming a symmetrical pre-contact posture.
[0050] In the initial stage of hoisting, when the coil wall first contacts the pressure member 8 on the side of the upper beam 105, the inclined surface of the top pressure section 802 contacts the edge of the outer wall of the coil. The horizontal movement of the coil forces the pressure member 8 to swing around the guide post 106 towards the inside of the C-shaped groove 101, while the sliding section 801 slides downward along the guide post 106. During this process, the inclined surface of the top pressure section 802 converts the lateral impact force of the coil into a vertical sliding displacement, counteracting the lateral swaying of the hook 1. When the pressure member 8 swings to a horizontal state, the top pressure section 802 is completely in contact with the outer wall of the coil, sliding and abutting along the axis of the coil, forming a stable upper limit. If the coil first contacts the swing plate 3 on the side of the lower beam 102, the pressure member 8 remains inclined as the hook 1 approaches until the coil rises to contact the top pressure section 802, triggering the above-mentioned limiting mechanism. Regardless of whether the steel coil contacts the upper or lower part first, the pressure member 8 and the swing plate 3 are designed to pre-contact in opposite tilt directions to ensure that at least one set of components intervenes in advance to guide the movement and avoid large swaying of the hook body 1 due to force on one side.
[0051] The pressure member 8 and the swing plate 3 are distributed on the upper and lower sides of the C-shaped groove 101 with opposite inclination directions, forming a "double insurance" anti-sway structure. When the steel coil contacts the upper beam 105 first due to positional deviation in the initial stage of hoisting, the inclined top pressure section 802 of the pressure member 8 first converts the lateral displacement of the steel coil into the swing and sliding of the pressure member through the inclined guide, suppressing the swaying of the hook 1; if the steel coil contacts the lower swing plate 3 first, the upper pressure member 8 serves as a backup limit, providing upper constraint after the steel coil has fully entered the C-shaped groove 101, ensuring that a stable guiding relationship can be quickly established regardless of the contact sequence, solving the problem of traditional structures relying only on lower guidance and being prone to swaying when contact fails.
[0052] In some examples, the inward pushing force provided by the second elastic element 6 and the pushing force of the first elastic element 4 below form a coordinated elastic force field. Regardless of whether the steel coil is biased upward or downward in the initial stage of hoisting, the positional deviation can be automatically corrected by the elastic force. When the steel coil contacts the pressure member 8 and swings outward, the rebound force of the second elastic element 6 continuously pushes the steel coil towards the inside of the swing plate 3, assisting the guiding role of the swing plate 3, reducing the alignment error between the axis of the lower beam 102 and the axis of the center hole of the steel coil to a minimum, solving the alignment difficulty caused by the initial positional deviation of the steel coil, which is especially suitable for storage scenarios where the stacking position of steel coils is not uniform. In the critical state before the steel coil has fully entered the C-shaped groove 101, the elastic pushing force of the second elastic element 6 can effectively counteract the lateral swaying of the hook caused by the vibration of the hoisting equipment or wind. For example, when the hook 1 is shifted outward by the wind, the pressure member 8 swings outward and compresses the second elastic element 6, and the elastic force immediately pushes the hook back to its original position, forming a passive anti-sway damping effect, reducing the swaying frequency in the initial stage of hoisting. Furthermore, the elastic deformation capacity of the second elastic element 6 allows the pressure element 8 to automatically adjust the pushing force according to the diameter of the steel coil.
[0053] In some examples, under natural conditions, the preload of the second tension spring 7 keeps the pressure member 8 tilted towards the opening at an angle of 15°-30° in its reset state. Simultaneously, the compressive force of the second elastic member 6 provides an inward pushing force. The combined force of these two forces ensures that the pressure member 8 remains stable in its initial position when unloaded. During hoisting, when the outer wall of the steel coil pushes the pressure member 8 to swing inward toward the C-groove 101, the second tension spring 7 is stretched and stores elastic potential energy, which, together with the compressive deformation of the second elastic member 6, absorbs the lateral impact force of the steel coil. After the steel coil is unloaded, the contraction force of the second tension spring 7 and the elastic force of the second elastic member 6 work together to quickly pull the pressure member 8 around the guide post 106 to swing back towards the opening, preparing it for the next hoisting operation. The second tension spring 7 and the second elastic member 6 ensure that the pressure member 8 can quickly reset via elastic force regardless of which direction it swings.
[0054] In some examples, the top-pressing assembly 700 consists of a guide protrusion 106, a pressure member 8, a second elastic member 6, and a second tension spring 7. Two sets of top-pressing assemblies are symmetrically arranged on the left and right sides of the upper beam 105 along the inner extension direction of the C-shaped groove 101, forming a bidirectional constraint structure with the lower guide assembly 200. The symmetrically arranged top-pressing assemblies 700 simultaneously abut against the outer wall of the steel coil through the pressure members 8 on both sides, converting the unilateral force into a balanced bidirectional pushing force, effectively suppressing the lateral displacement during the steel coil hoisting process, improving the lateral stability of the hook 1 under complex working conditions, and the double-sided top-pressing assemblies work together to bear the load of the steel coil, avoiding wear or deformation of the single-sided components due to uneven force, and extending the service life compared to the traditional single-sided structure.
[0055] In some examples, guide chamfers 111 are respectively provided at the edges of the opening of the C-groove 101 on the upper beam 105 and the lower beam 102. The chamfer surface is an inclined smooth curved surface, and the upper and lower chamfers form a trumpet-shaped opening with a width slightly larger than the diameter of the steel coil, which is used to guide the steel coil smoothly into the C-groove 101. The guide chamfer 111, through its curved surface transition design, transforms the rigid contact between the steel coil and the opening of the C-groove 101 into a sliding guide, significantly reducing the collision resistance when the steel coil enters. This allows operators to quickly guide the steel coil into the C-groove without precise alignment, improving the alignment efficiency in the initial stage of hoisting.
[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A C-shaped sling for stabilizing a hoist, for stabilizing a C-shaped hook when hoisting a cylindrical steel coil, characterized by, include: The hook body (1) has an upper beam (105), a connecting part (107) and a lower beam (102) connected in sequence. The lower beam (102) is used to insert into the center hole of the steel coil and support the steel coil during hoisting. The upper beam (105), the connecting part (107) and the lower beam (102) together form a C-shaped groove (101) with a side opening. The C-shaped groove (101) is used to accommodate the coil wall of the steel coil. The swing plate (3) is oscillatingly mounted on the lower beam (102). After the coil wall enters the C-shaped groove (101), the swing plate (3) slides against the inner wall of the coil and is driven to swing by the coil, so that the lower beam (102) can enter the center hole of the coil under the guidance of the inner wall of the coil. The reset state of the swing plate (3) is an inclined state, and the inclined direction is towards the opening direction of the C-shaped groove (101). The first tension spring (5) has one end acting on the swing plate (3) and the other end acting on the lower beam (102) to provide a force to pull the swing plate (3) to swing back.
2. A C-type sling for stabilizing a load as claimed in claim 1, characterized in that The swing plate (3) has a first slot (301), and the lower beam (102) is provided with a first limiting slot (103). The first limiting slot (103) is located above the first slot (301). The swing plate (3) is configured to swing so that the first slot (301) can accommodate or deaccommodate the first limiting slot (103).
3. A C-type sling for stabilizing a load as defined in claim 1, wherein The lower beam (102) is provided with a first slider (2) that is slidably raised and lowered, and the swing plate (3) is swayingly disposed on the first slider (2), and further includes: The first elastic element (4) has one end acting on the lower beam (102) and the other end acting on the first slider (2) to elastically push the first slider (2), thereby driving the swing plate (3) upward into the C-shaped groove (101).
4. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 3, wherein, The lower beam (102) has a second slot (104), which is located below the first slider (2) and opens upward. The swing plate (3) is also provided with a second limiting slot (302) at its swing axis. The second limiting slot (302) has two symmetrically arranged locking edges (303) on both sides. After the swing plate (3) swings, the two locking edges (303) are parallel to the two side walls of the second slot (104), thereby allowing the swing plate (3) to move downward and drive the second limiting slot (302) to be locked into the second slot (104).
5. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 3, wherein, The first slider (2), the swing plate (3), the first elastic element (4) and the first tension spring (5) together form a guide assembly (200). The guide assemblies (200) are arranged in pairs, and the two sets of guide assemblies (200) are located on the left and right sides of the C-shaped groove (101) respectively.
6. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 1, wherein, The hook body (1) also has an upper beam portion (105), the upper beam portion (105) and the lower beam portion (102) are located on the upper and lower sides of the C-shaped groove (101) respectively, and the side wall of the upper beam portion (105) is provided with a guide protrusion (106), and further includes: The pressure member (8) has a sliding section (801) and a pressing section (802). The sliding section (801) and the pressing section (802) are perpendicular to each other. The sliding section (801) has a strip-shaped guide groove (803) with a width matching the diameter of the guide protrusion (106). The sliding section (801) allows the pressure member (8) to swing and slide up and down under the sliding cooperation of the strip-shaped guide groove (803) and the guide protrusion (106). When the pressure member (8) is in the reset state, the pressure member (8) is in the inclined state, and the inclined direction is towards the opening direction of the C-shaped groove (101). The pressure member (8) has two vertical parts for sliding contact with the outer wall edge of the steel coil, and is configured to be driven by the steel coil to swing until the top pressure section (802) is in the horizontal state, and the top pressure section (802) slides against the outer wall of the steel coil, with the relative sliding direction being parallel to the axis of the steel coil.
7. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 6, wherein, Also includes: The second elastic element (6) has one end acting on the guide protrusion (106) and the other end acting on the bottom wall of the strip guide groove (803) to provide the pressure member (8) with a force that elastically pushes the steel coil toward the swing plate (3).
8. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 7, wherein, Also includes: The second tension spring (7) has one end acting on the upper beam (105) and the other end acting on the pressure member (8) to provide the force for the pressure member (8) to swing back.
9. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 8, wherein, The guide protrusion (106), the pressure member (8), the second elastic member (6) and the second tension spring (7) together form a top pressure assembly (700). The top pressure assemblies (700) are arranged in pairs, and the two sets of top pressure assemblies (700) are symmetrically arranged on the left and right sides of the C-shaped groove (101).
10. A C-type sling for stabilizing a load suspended from a lifting device as defined in claim 6, wherein, Both the upper beam (105) and the lower beam (102) are provided with guide chamfers (111), and the two guide chamfers (111) are located on the upper and lower sides of the opening of the C-shaped groove (101), respectively.