A gantry crane with automatic deviation correction function

Abstract

This invention relates to the field of crane technology, specifically to a gantry crane with an automatic correction function. The crane includes a crane body and a rope reel mounted on the crane body. A support base is located at the bottom of the rope reel. The support base can be rectangular or circular. A correction component is located at the center of the support base. Multiple sets of rope reeling components are arranged in a circular array around the correction component within the support base. A buffer component is located directly above the rope reeling components on the support base. A suspension is located below the buffer component. This solution, by reconstructing the lifting force pattern, introducing a mechanical self-synchronizing correction mechanism, and optimizing the buffer damping characteristics, constructs an active stabilization system integrating center of gravity pre-stabilization, dynamic leveling, and energy dissipation. This fundamentally solves the problem of tilting and loss of control caused by center of gravity shift in traditional cranes, significantly enhancing operational safety while improving operational accuracy.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and more specifically, to a gantry crane with an automatic correction function. Background Technology

[0002] A search revealed a crane alignment device disclosed in publication number CN220519982U. This device includes a guide rail, a movable seat, a drive unit, and alignment components. The movable seat is movably mounted on the guide rail, and alignment components are mounted at its front and rear ends. The drive unit drives the movable seat to move back and forth. Each alignment component includes a mounting base, a brake pad, a swing element, an alignment wheel, and a spring. The mounting base is mounted on the side of the movable seat, the brake pad is mounted on the mounting base, one end of the swing element is hinged to the mounting base, and the other end of the swing element is mounted with an alignment wheel. One end of the alignment wheel abuts against the guide rail, and the other end can abut against the brake pad. One end of the spring is connected to the mounting base, and the other end of the spring is connected to the swing element. This crane alignment device solves the problems in the prior art where the movable seat continuously moves under misalignment, leading to severe wear on the guide wheel and guide rail, and the phenomenon of direct jamming.

[0003] The aforementioned patent still has shortcomings in practical use. During crane operation, the end hook inevitably sways when lifting objects, affecting the object's placement. Currently, to ensure placement stability, manual intervention is usually relied upon, but this method poses significant safety hazards. Although existing technologies include spring buffer structures around the hook to suppress swaying, such passive buffering mechanisms are ineffective once the lifted object tilts significantly and cannot be actively corrected. This is because objects are typically lifted from a position above their center of gravity using straps or ropes. Once tilting occurs, the center of gravity shifts, and the spring buffers at the four corners alone are insufficient to effectively restore balance or correct posture, rendering the buffering measures ineffective.

[0004] Based on this, the present invention discloses a gantry crane with automatic correction function. Summary of the Invention

[0005] To address the problem mentioned in the background art that the tilting of a crane hook during lifting due to the shift of the object's center of gravity is difficult to effectively suppress using existing four-corner spring buffer structures, while relying on manual support poses safety hazards, and a more reliable active correction or stabilization control technology is urgently needed, this invention provides a gantry crane with an automatic correction function. It includes a crane body and a rope reel mounted on the crane body. A support base is located at the bottom of the rope reel. The support base can be rectangular or circular. A correction component is located at the center of the support base. Multiple sets of rope reeling components are arranged in a circular array around the correction component within the support base. A buffer component is located directly above the rope reeling components on the support base. A suspension is located below the buffer components. Since objects may sway or even tilt during movement, this invention first ensures that the ropes at the four corners of the object are raised and lowered synchronously. This ensures that the ropes at the four corners always maintain the same length, preventing the object from swaying or tilting and causing the center of gravity to shift, which would ultimately lead to different rope lengths and make it impossible to correct. Secondly, there is cushioning. Objects usually only tilt and sway slightly, so only cushioning is needed to reduce the swaying. As a further improvement to this technical solution, the correction component includes a main gear and a first rotating shaft. The first rotating shaft is fixedly connected to the center of the support base. The main gear is rotatably connected to the first rotating shaft. A strong torsion spring is provided on the first rotating shaft. The main gear is connected to the first rotating shaft through the strong torsion spring. The torque of the strong torsion spring always tends to cause the rope to wind up onto the winding coil. Secondly, the rope-releasing assembly includes a secondary gear meshing with the main gear. A rope-retracting coil is located at the bottom of the secondary gear. The rope-releasing assembly also includes a damping sleeve. A support plate is located on the fixed end of the damping sleeve away from the main gear, and a baffle is located on the telescopic end of the damping sleeve. A high-pressure spring is located between the support plate and the baffle. A rope is attached to the rope-retracting coil, and a hook is located on the portion of the rope between the baffle and the rope-retracting coil. Furthermore, the rope-releasing assembly also includes several second rotating shafts corresponding to the secondary gear. These second rotating shafts are rotatably connected within a support base. Both the secondary gear and the rope-retracting coil are fixedly connected to the second gear. On the two rotating shafts, the rope passes sequentially through the baffle, support plate, and damping sleeve, with the diameter of the hook larger than the diameter of the opening on the baffle. Furthermore, a pulley is provided on the side of the support plate away from the damping sleeve, and the pulley is fixedly connected to one corner of the outer side of the support base. The end of the rope away from the winding coil slides over the pulley and is fixedly connected to a hook. The pulley's function is to reduce friction at bends, facilitating rope pull-out and winding. A slider is fixedly connected to the bottom of the baffle, and a groove adapted to the slider is opened in the bottom of the support base. The baffle is movably connected to the groove via the slider.

[0006] Furthermore, the ropes on several of the aforementioned winding coils have the same release side and the same release angle.

[0007] Based on this, since traditional methods of suspending objects involve binding, which can easily lead to instability during the suspending process, this invention uses a matching suspension frame to assist in suspending the object, so that the object's center of gravity is already relatively stable before suspending, reducing the risk of swaying later. Specifically, the bottom of the hook is equipped with a suspension frame, which includes a rectangular suspension body, with hooks fixedly connected to the top and bottom sides of the four corners of the suspension body.

[0008] In another approach, when the object tilts at a large angle, the rope on the side with the higher angle will stretch more, causing the main gear to rotate, which in turn drives the other sets of secondary gears to rotate, and so on. Figure 9 As shown, the rope reel on the side with the lower inclination angle will release the rope. At this time, due to the action of the high-pressure spring, the baffle is prevented from instantly resetting and the baffle is controlled to prevent it from oscillating back and forth due to the elastic force of the high-pressure spring. Therefore, the movement of the baffle in this invention is damped. Specifically, when hooking an object, the resistance to the movement of the baffle is less than the resistance when the baffle resets. As a further improvement to this technical solution, the buffer assembly includes several sets of protrusions disposed within the support base and located on the moving path of the baffle; secondly, the buffer assembly also includes a top plate fixedly connected to the baffle, a pressure plate disposed on the top plate, a spring telescopic rod disposed at the center of the pressure plate, the fixed end of the spring telescopic rod being fixedly connected to the pressure plate, a rotating rod being rotatably connected to the telescopic end of the spring telescopic rod, the top of the rotating rod passing through the support base and being threadedly connected to the support base, and an avoidance groove adapted to the pressure plate being opened in the top of the support base; The bottom of the baffle is fixedly connected to a wedge block that matches the gap between the protrusions, and the bottom sides of the baffle have an arc-shaped structure. The chamfer radius of the side of the baffle away from the protrusion is smaller than the chamfer radius of the other side of the baffle.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this type of gantry crane with automatic correction function, a special suspension structure with synchronous force at four corners is adopted in combination with a multi-point hoisting method to change the center of gravity of the object from traditional single-point center hoisting to distributed bearing at four corners, so as to achieve pre-balance of the center of gravity before hoisting. This method effectively avoids the initial tilt caused by uneven binding or center of gravity shift, significantly improves the overall stability during hoisting, and thus greatly reduces the risk of large swaying or imbalance during subsequent operation.

[0010] 2. In this gantry crane with automatic correction function, a mechanical linkage correction mechanism consisting of a central main gear and a circumferential auxiliary gear is set up. Combined with the synergistic effect of high-pressure springs and directional damping structures in each rope-laying unit, when any corner rope is stretched due to tilting, it can automatically trigger the synchronous rope laying of the other corners, maintaining the equal length of the four ropes in real time. This mechanism not only realizes the active perception and dynamic compensation of sudden tilt angles, but also prevents secondary oscillations caused by spring reset through damping control, thereby completing the effective correction of the tilt state without manual intervention.

[0011] 3. In this type of gantry crane with automatic correction function, a buffer component with unidirectional friction characteristics is integrated in the support base. This makes the resistance of the baffle smaller when it is pulled outward, which is convenient for responding to changes in gravity. When it is reset, the wedge structure and the convex block generate greater friction resistance, forming a hysteresis damping effect. This not only ensures the system's sensitive tracking of load changes, but also effectively suppresses the energy transmission of high-frequency micro-amplitude swaying, further improving the stability of hoisting and reducing the dependence on operators. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rope reel structure of the present invention; Figure 3 This is a schematic diagram of the support base of the present invention; Figure 4 This is a cross-sectional view of the support base of the present invention; Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 for Figure 4 Enlarged view of the structure at point B; Figure 7 This is a schematic diagram of the rope-releasing assembly of the present invention; Figure 8 This is a schematic diagram of the winding state of the rope according to the present invention; Figure 9 This is a schematic diagram of the rope-releasing assembly of the present invention. Figure 10 This is a schematic diagram of the suspension structure of the present invention.

[0013] The meanings of the labels in the diagram are as follows: 1. Crane body; 2. Rope reel; 3. Support base; 4. Straightening assembly; 5. Rope reel assembly; 6. Buffer assembly; 8. Suspension; 41. First rotating shaft; 42. Main gear; 43. High-strength torsion spring; 51. Damping sleeve; 52. Support plate; 53. Baffle; 54. High-pressure spring; 55. Second rotating shaft; 56. Secondary gear; 57. Rope winding coil; 58. Rope body; 59. Hook; 510. Pulley; 511. Hook; 512. Slide groove; 513. Sliding block; 61. Top plate; 62. Pressure plate; 63. Spring telescopic rod; 64. Rotating rod; 65. Clearance groove; 66. Protrusion; 67. Wedge block; 81. Suspension body; 82. Hook and ring. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] The existing crane hooks are difficult to effectively suppress tilting caused by the shift of the center of gravity of the object during the lifting process using the existing four-corner spring buffer structure, while relying on manual support poses safety hazards. There is an urgent need for more reliable active correction or stabilization control technology.

[0016] Therefore, the present invention provides a gantry crane with automatic deviation correction function, see [link to relevant documentation]. Figures 1-4 As shown, it includes a crane body 1 and a rope reel 2 mounted on the crane body 1. A support base 3 is provided at the bottom of the rope reel 2. The support base 3 can be rectangular or circular. A correction component 4 is provided at the center of the support base 3. Multiple sets of rope reeling components 5 are arranged in a circular array around the correction component 4 in the support base 3. A buffer component 6 is provided on the support base 3 directly above the rope reeling components 5. A suspension 8 is provided below the buffer component 6.

[0017] It should be noted that the number of rope-releasing components 5 in this invention needs to be greater than one set, but the following description uses four sets as an example.

[0018] During operation, the object is secured by suspension 8, which pre-stabilizes the object. Suspension 8, with its rectangular structure, shifts the object's support position from the traditional center to the four corners, further improving stability and preventing swaying or tilting. The object is then lifted by hoisting suspension 8. During lifting, the crane body 1 controls the lowering of rope reel 2. Once lowered to the appropriate position, rope reel 2 is hooked up by rope release assembly 5. During this hooking process, the elasticity of the spring structure within rope release assembly 5 gradually balances with the object's weight, allowing the object to lift. The object is lifted; during the movement, if swaying occurs, it will be buffered by the spring structure. If tilting occurs, the tilt angle of the object will be adjusted synchronously by the cooperation of the correction component 4 and the rope release component 5. That is, when the object tilts, the side with the higher tilt angle will stretch the rope first, and then transmit it to the rope release component 5 on the opposite side of the tilt angle through the correction component 4, so that the rope is released synchronously, thereby achieving the balance of the object and making it change from tilt to horizontal. In this process, in order to prevent the rope from being pulled back by the elastic force or from vibrating due to the elastic force, the buffer component 6 is used to buffer and absorb energy.

[0019] For details, see Figure 4 , Figures 7-9 As shown, since objects may sway or even tilt during movement, this invention first ensures that the ropes at the four corners of the suspended object are wound and released synchronously. This ensures that the ropes at the four corners always maintain the same length, preventing the object from swaying or tilting and causing the center of gravity to shift, which would ultimately result in different rope lengths that cannot be corrected. Secondly, there is cushioning. Objects usually only tilt and sway slightly, so only cushioning is needed to reduce the swaying. Specifically, the correction component 4 includes a main gear 42 and a first rotating shaft 41. The first rotating shaft 41 is fixedly connected to the center of the support base 3. The main gear 42 is rotatably connected to the first rotating shaft 41. A strong torsion spring 43 is provided on the first rotating shaft 41. The main gear 42 is connected to the first rotating shaft 41 through the strong torsion spring 43. The torque of the strong torsion spring 43 always tends to cause the rope body 58 to wind up onto the winding coil 57. Secondly, the rope release assembly 5 includes a secondary gear 56 meshing with the main gear 42. A rope take-up coil 57 is located at the bottom of the secondary gear 56. The rope release assembly 5 also includes a damping sleeve 51. A support plate 52 is located on the fixed end of the damping sleeve 51 away from the main gear 42. A baffle 53 is slidably located on the telescopic end of the damping sleeve 51. A high-pressure spring 54 is located between the support plate 52 and the baffle 53. A rope body 58 is located on the rope take-up coil 57. A hook 59 is located on the portion of the rope body 58 between the baffle 53 and the rope take-up coil 57. The rope release assembly 5 also includes several second rotating shafts 55 corresponding to the secondary gear 56. The second rotating shafts 55 are rotatably connected within the support base 3. Both the secondary gear 56 and the rope take-up coil 57 are fixedly connected to the second rotating shafts 55. On the rotating shaft 55, the rope body 58 passes through the baffle 53, the support plate 52, and the damping sleeve 51 in sequence, and the diameter of the hook 59 is larger than the diameter of the opening on the baffle 53; and, a pulley 510 is provided on the side of the support plate 52 away from the damping sleeve 51. The pulley 510 is fixedly connected to one corner of the outer side of the support base 3, and the end of the rope body 58 away from the winding coil 57 slides over the pulley 510 and is fixedly connected to the hook 511. The purpose of the pulley 510 is to reduce friction at the bend and facilitate the pulling out and winding of the rope body 58; a slider 513 is fixedly connected to the bottom of the baffle 53, and a groove 512 adapted to the slider 513 is opened in the bottom of the support base 3. The baffle 53 is movably connected to the groove 512 through the slider 513.

[0020] It should be added that, see [link / reference] Figure 8 As shown, the rope bodies 58 on several winding coils 57 have the same release side and the same release angle, which ensures that when the main gear 42 rotates, the rope bodies 58 on several sets of winding coils 57 can be wound or released.

[0021] In addition, see Figure 10 As shown, since objects are traditionally lifted by binding, the center of gravity is easily unstable during lifting. This invention uses a matching hanger to lift the object, so that the center of gravity of the object is already stable before it is lifted, reducing the risk of swaying later. Specifically, the bottom of the hook 511 is provided with a suspension 8, which includes a rectangular suspension body 81. Hook rings 82 are fixedly connected to the top and bottom of the four corners of the suspension body 81.

[0022] During operation, straps or ropes are passed through the hooks 82 at the four corners of the bottom of the suspension body 81, and then the object is tied to them, so that the support of the object is shifted from the traditional center position to the four corners of the suspension body 81. Then, the hook 511 is pulled out. The length of the rope body 58 on the winding coil 57 has a margin, that is, there is a certain distance between the hook 59 and the opening of the baffle 53. This distance allows the worker to pull out the hook 511 to adjust its position. When resting, because the main gear 42 is equipped with a strong torsion spring 43, the rope body 58 will be rewound onto the winding coil 57. At this time, the hook 511 will be close to the bottom of the support base 3 to ensure the safety of the equipment and prevent the worker from injuring his head. After the hooks 511 hook the hooks 82 on the four corners of the top of the suspension body 81, the object is supported at the four corners. Then the object is lifted by releasing the rope coil 2. During the lifting process, the hooks 511 at the four corners will be pulled up by the support seat 3. The function of setting the support seat 3 is to further optimize the support point from the traditional single center point to multi-angle flat support, which further improves the stability during the lifting process. During the lifting process, due to the weight of the object, the rope body 58 will be pulled out from the winding coil 57 through the hook 511 until the hook 59 abuts against the opening of the baffle 53. At this time, the hook 59 begins to press against the baffle 53 to compress the high-pressure spring 54 until the elastic force of the high-pressure spring 54 is balanced with the weight at the corresponding corner position. At this time, the object will be completely lifted. During this process, when the rope body 58 is pulled out, it will drive the winding coil 57 and the secondary gear 56 to rotate, which in turn will drive the main gear 42 to rotate. The rope bodies 58 on the other winding coils 57 are all engaged with the main gear 42 through the secondary gear 56. That is to say, when one set of rope bodies 58 is pulled out, the corresponding other sets of winding coils 57 will also rotate, thereby releasing the rope. The rotation is controlled by the gear, which ensures that the length of the released rope is consistent. The same applies when winding. Moreover, through Figure 8 It can be seen that the rope body 58 on each group of rope reels 57 has a consistent rope release side. Figure 8 For example, the upper group of rope release sides are all on the right side, and the lower group is all on the left side. In this way, when the main gear 42 rotates, the several sets of auxiliary gears 56 that mesh with it rotate in the same direction, thus releasing or rewinding the rope synchronously.

[0023] During the lifting and movement, if swaying occurs, the rope will experience a short change in length. During this process, the rope body 58 will slide within the groove 512 via the hook 59 and the baffle 53. The presence of the high-pressure spring 54 will buffer this change in rope body 58 caused by the swaying. During the resetting process of the rope body 58, the damping sleeve 51 has a damping effect, which can absorb the kinetic energy of the high-pressure spring 54 and prevent vibration. During the resetting process, the rope body 58 will be wound onto the winding coil 57 by the torque of the strong torsion spring 43. As for the swaying of the hook 511, its circular array layout has minimized the overall swaying. Minor local swaying can be stopped by leaving it still or by the worker gently touching it, greatly reducing the risk to the worker.

[0024] Further, see Figures 4-6 and Figure 9 As shown, when the object tilts at a large angle, the rope on the side with the higher angle will stretch more, causing the main gear 42 to rotate, which in turn drives the other sets of secondary gears 56 to rotate, and then... Figure 9 As shown, the rope reel 57 on the side with the lower inclination angle will release the rope. At this time, due to the action of the high-pressure spring 54, the baffle 53 is prevented from instantly resetting and the baffle 53 is controlled to prevent it from oscillating back and forth due to the elastic force of the high-pressure spring 54. Therefore, the movement of the baffle 53 in this invention is damped. Specifically, when hooking an object, the resistance of the movement of the baffle 53 is less than the resistance when the baffle 53 resets. Specifically, the buffer assembly 6 includes several sets of protrusions 66 disposed within the support base 3 and located on the moving path of the baffle 53; secondly, the buffer assembly 6 also includes a top plate 61 fixedly connected to the baffle 53, a pressure plate 62 disposed on the top plate 61, a spring telescopic rod 63 disposed at the center of the pressure plate 62, the fixed end of the spring telescopic rod 63 being fixedly connected to the pressure plate 62, a rotating rod 64 being rotatably connected to the telescopic end of the spring telescopic rod 63, the top of the rotating rod 64 passing through the support base 3 and being threadedly connected to the support base 3, and an avoidance groove 65 adapted to the pressure plate 62 being opened in the top of the support base 3; The bottom of the baffle 53 is fixedly connected to a wedge 67 that matches the gap of the protrusion 66, and the bottom sides of the baffle 53 have an arc-shaped structure. The chamfer radius of the side of the baffle 53 away from the protrusion 66 is smaller than the chamfer radius of the other side of the baffle 53.

[0025] During operation, when lifting, the corresponding rotating rods 64 on each set of baffles 53 are rotated first, so that they press the pressure plate 62 through the spring telescopic rod 63, thereby pressing the top plate 61 through the pressure plate 62, causing the baffles 53 to fit tightly against the bottom of the slide groove 512. When lifting, due to the large weight of the object, the gravity generates tension through the rope body 58, which pulls the hook 59 against the baffles 53 to move outward, compressing the high-pressure spring 54, until the gravity and the spring force are balanced. In addition, the arc angle of the side of the bottom of the baffle 53 away from the first rotating axis 41 is larger, so the friction between its bottom and the protrusion 66 is smaller than that of the other side. Furthermore, the baffles 53 are pressed against the bottom of the slide groove 512 by the spring telescopic rod 63, and the spring telescopic rod 63 is a telescopic sleeve with a built-in spring structure, so it has telescopic characteristics, allowing the baffles 53 to slide outward. It should be added that the extension end of the baffle 53 and the damping sleeve 51 are slidably connected. Therefore, the baffle 53 can slide up and down to a certain extent on the extension end of the damping sleeve 51, so the baffle 53 can pass over the protrusion 66. The high pressure spring 54 itself has deformation characteristics, so it does not affect the baffle 53's lateral compression of the high pressure spring 54 and its longitudinal passing over the protrusion 66.

[0026] like Figure 9 As shown, if a large tilt angle occurs due to accidental shaking, traditional hoisting methods cannot correct it. However, with this invention, [the following is possible:] Figure 9 For example, if a tilt occurs to the lower left, the right rope body 58 will be pulled out to a greater length due to the instantaneous shift of the center of gravity. When the right rope body 58 is pulled out, it will drive the corresponding winding coil 57 to rotate, which in turn drives the main gear 42 to rotate through the secondary gear 56 on it. This causes other sets of secondary gears 56 to rotate in succession, thus releasing the rope synchronously, so that other sets of rope bodies 58 will also be released. At this time, because the baffle 53 compresses the high-pressure spring 54, and the high-pressure spring 54 is in a high-pressure state, in order to prevent the baffle 53 from being stopped by the hook 59 and instantly returning to its original position due to the high-pressure spring 54 when the rope body 58 is released, causing vibration, the baffle 53 uses the friction between the wedge block 67 and the protrusion 66. Moreover, the arc angle of the side of the baffle 53 near the first rotating shaft 41 is smaller, and its resistance with the protrusion 66 is greater, thus producing a greater damping effect, making the return of the baffle 53 have a lag. In this way, when the rope body 58 is released, the baffle 53 will not instantly return to its original position, and at this time the gravity of the object will act on the rope body 58, causing the released rope body 58 to be pulled out. Next, because of the tilt to the left, the center of gravity will inevitably shift to the left, so the released rope body 58 will be pulled out; at this time, the lengths of the rope bodies 58 at the four corners will be consistent again, causing the object to tend to be in the horizontal state when it is suspended; however, the tilting trend has not ended and the center of gravity has not been restored. Since the center of gravity is shifted to the left at this moment, the rope body 58 that was pulled out instantly on the right side will gradually contract again because the elastic force of the high pressure spring 54 is greater than the gravity corresponding to that corner. At this time, the rope body 58 pulled out on the left will also generate a contraction force due to the contraction of the rope body 58 on the right. This contraction force will cause the object to tend to return to the right. However, since the length of the four corner rope bodies 58 will always remain the same, the high-pressure spring 54 and the damping of the protrusion 66, along with the main gear 42 adjusting the changes in the length of the four sets of rope bodies 58, will eventually drive each set of rope bodies 58 to return to the length when it was lifted, thereby achieving the effect of correcting the tilt of the object.

[0027] In summary, this effectively solves the problem that existing crane hooks cannot effectively suppress tilting caused by the shift of the center of gravity of the object during lifting, and that relying on manual support poses safety hazards. Therefore, a more reliable active correction or stabilization control technology is urgently needed.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portal crane with automatic deviation correction function, comprising a crane body (1) and a rope reel (2) arranged on the crane body (1), characterized in that: A support base (3) is provided at the bottom of the rope roll (2). A correction component (4) is provided at the center of the support base (3). Multiple rope release components (5) are arranged in a circular array around the correction component (4) inside the support base (3). A buffer component (6) is provided on the support base (3) directly above the rope release component (5). Among them, the correction component (4) includes the main gear (42); The rope release assembly (5) includes a secondary gear (56) that meshes with the main gear (42). A rope take-up coil (57) is provided at the bottom of the secondary gear (56). The rope release assembly (5) also includes a damping sleeve (51). A support plate (52) is provided on the fixed end of the damping sleeve (51) away from the main gear (42). A baffle (53) is provided on the telescopic end of the damping sleeve (51). A high-pressure spring (54) is provided between the support plate (52) and the baffle (53). A rope body (58) is provided on the rope take-up coil (57). A hook (59) is provided on the part of the rope body (58) located between the baffle (53) and the rope take-up coil (57). The buffer assembly (6) includes a number of sets of protrusions (66) disposed within the support base (3) and located on the moving path of the baffle (53); The buffer assembly (6) also includes a top plate (61) fixedly connected to the baffle (53). A pressure plate (62) is provided on the top plate (61). A spring telescopic rod (63) is provided at the center of the pressure plate (62). The fixed end of the spring telescopic rod (63) is fixedly connected to the pressure plate (62). A rotating rod (64) is rotatably connected to the telescopic end of the spring telescopic rod (63). The top of the rotating rod (64) passes through the support base (3) and is threadedly connected to the support base (3). An avoidance groove (65) adapted to the pressure plate (62) is provided at the top of the support base (3). The bottom of the baffle (53) is fixedly connected to a wedge (67) that matches the gap of the protrusion (66), and the bottom sides of the baffle (53) are arc-shaped. The chamfer radius of the side of the baffle (53) away from the protrusion (66) is smaller than the chamfer radius of the other side of the baffle (53).

2. Portal crane with automatic correction of deviation, according to claim 1, characterized in that: The support base (3) has a rectangular structure.

3. The portal crane with automatic correction of deviation function according to claim 1, characterized in that: The correction assembly (4) also includes a first rotating shaft (41), which is fixedly connected to the center of the support base (3). The main gear (42) is rotatably connected to the first rotating shaft (41). A strong torsion spring (43) is provided on the first rotating shaft (41). The main gear (42) is connected to the first rotating shaft (41) through the strong torsion spring (43).

4. Portal crane with automatic correction of deviation, according to claim 3, characterized in that: The torque of the powerful torsion spring (43) always tends to cause the rope body (58) to wind up onto the winding coil (57).

5. The gantry crane with automatic correction function according to claim 1, characterized in that: The rope release assembly (5) also includes several second rotating shafts (55) corresponding to the auxiliary gear (56). The second rotating shafts (55) are rotatably connected in the support base (3). The auxiliary gear (56) and the rope winding (57) are both fixedly connected to the second rotating shafts (55). The rope body (58) passes through the baffle (53), the support plate (52) and the damping sleeve (51) in sequence, and the diameter of the hook (59) is larger than the diameter of the opening on the baffle (53).

6. The gantry crane with automatic correction function according to claim 1, characterized in that: A pulley (510) is provided on the side of the support plate (52) away from the damping sleeve (51). The pulley (510) is fixedly connected to one corner of the outside of the support base (3). The end of the rope body (58) away from the rope winding (57) slides over the pulley (510) and is fixedly connected to the hook (511).

7. The gantry crane with automatic correction function according to claim 1, characterized in that: The bottom of the baffle (53) is fixedly connected to a slider (513), and the bottom of the support base (3) is provided with a groove (512) that matches the slider (513). The baffle (53) is movably connected to the groove (512) through the slider (513).

8. The gantry crane with automatic correction function according to claim 1, characterized in that: The rope bodies (58) on several of the aforementioned rope reels (57) have the same release side and the same release angle.

9. The gantry crane with automatic correction function according to claim 6, characterized in that: The bottom of the hook (511) is provided with a suspension (8), the suspension (8) includes a suspension body (81) with a rectangular structure, and hook rings (82) are fixedly connected to the upper and lower sides of the four corners of the suspension body (81).

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