Inward-retracting type three-jaw self-centering lifting appliance

Abstract

The embodiment of the utility model provides an inward-retracting type three-jaw self-centering lifting appliance, and relates to the technical field of lifting appliances. The adduction type three-jaw self-centering lifting appliance comprises a gantry crane, a traction component is installed on the top of the inner side of the gantry crane, the traction component comprises a clamping assembly, the clamping assembly comprises a lifting appliance body and an installation box, a first air cylinder is fixedly connected to an inner cavity of the installation box, and a push plate is fixedly connected to the output end of the first air cylinder. According to the technical scheme, through cooperation of the clamping assembly and the anti-shaking assembly, the function of flexibly adjusting the three-jaw lifting appliance in the transverse direction is achieved, and the problem that when a traditional three-jaw lifting appliance faces clamping objects at different positions, the direction needs to be manually adjusted is solved. The clamping assembly has good self-centering performance, can quickly and stably clamp workpieces in a round shape, a quasi-round shape or other regular shapes, and is particularly suitable for efficiently grabbing and placing clamped objects stacked in piles or densely arranged.

Description

Technical Field

[0001] This utility model relates to the field of lifting device technology, and in particular to an inward-retracting three-jaw self-centering lifting device. Background Technology

[0002] The retractable three-jaw self-centering spreader is a lifting and handling tool designed for specific needs, combining the features of a traditional three-jaw self-centering chuck with the functions of a spreader. This type of equipment is mainly used in applications requiring precise centering and secure clamping of workpieces, and is widely used in manufacturing, logistics, and warehousing, especially when handling heavy machinery parts or materials.

[0003] Currently, most commercially available three-jaw lifting slings are typically connected and secured to a gantry crane via padlocks or hooks when lifting objects. While this installation method is simple in structure and convenient to operate, it has certain limitations in practical use. When dealing with objects in different lateral positions, users often need to manually adjust the overall direction or angle of the lifting sling to ensure that its clamping structure is accurately aligned with the target workpiece. This process not only increases the workload of the operator but also reduces overall work efficiency.

[0004] Furthermore, during the lifting and lowering of the clamped object, external environmental vibrations, interference, or uneven lifting speeds can easily cause relative swaying between the object and the lifting device. This swaying not only affects the stability of the lifting operation but also poses safety hazards to surrounding equipment and personnel, making it inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to provide an inward-retracting three-jaw self-centering lifting device, which avoids the problems associated with existing three-jaw lifting devices that are typically connected to gantry cranes via padlocks or hooks. These devices require manual adjustment of direction when clamping workpieces at different lateral positions, which is inconvenient and inefficient. Furthermore, during lifting, vibrations or uneven lifting can cause swaying, affecting operational stability and posing safety hazards.

[0006] This utility model provides an inward-retracting three-jaw self-centering lifting device, including a gantry crane. A traction component is installed on the top of the inner side of the gantry crane. The traction component includes a clamping assembly. The clamping assembly includes a lifting device body and a mounting box. A first cylinder is fixedly connected to the inner cavity of the mounting box. A push plate is fixedly connected to the output end of the first cylinder.

[0007] The gantry crane is equipped with anti-sway components on both the left and right sides of its inner side. Each anti-sway component includes two long boxes, two rotating rods, and a positioning frame. Two limiting plates are fixedly connected to the surface of the rotating rods. Two guide rods are provided through the opposite side of the two limiting plates. A second cylinder is fixedly connected to the rear side of the positioning frame. The output end of the second cylinder extends through the inner side of the positioning frame and is fixedly connected to a round rod. The two ends of the round rod are slidably connected to the inner side of the limiting plate.

[0008] In one specific implementation, the inner cavity of the lifting device body is rotatably connected to a first threaded rod, and the outer surface of the first threaded rod is threadedly connected to two first threaded blocks, and the bottom of the first threaded blocks is slidably connected to the bottom of the inner cavity of the lifting device body.

[0009] In one specific implementation, the bottom of the first threaded block is installed on the top of the mounting box, and twelve connecting plates are fixedly connected to the surface of the push plate and the mounting box. The side of the connecting plates away from the push plate and the mounting box is rotatably connected to a movable plate.

[0010] In one specific implementation, a protective box is fixedly connected to the left side of the lifting device body, and a first motor is fixedly connected to the inner cavity of the protective box. The output shaft of the first motor is fixedly connected to the left end of the first threaded rod.

[0011] In one specific implementation, the inner cavity of the long box is rotatably connected to a second threaded rod, and welding boxes are fixedly connected to both the left and right sides of the top of the gantry crane.

[0012] In one specific implementation, a second motor is fixedly connected to the inner cavity of the welding box, and the output shaft of the second motor is fixedly connected to the top end of the second threaded rod.

[0013] In one specific implementation, the surface of the second threaded rod is threadedly connected to a second threaded block, and both the front and rear sides of the second threaded block are slidably connected to the front and rear sides of the inner cavity of the long box.

[0014] In one specific implementation, one side of the second threaded block is fixedly connected to the surface of the positioning frame, and the inner cavity of the positioning frame is rotatably connected to the left and right ends of the rotating rod.

[0015] In one specific implementation, a welding plate is fixedly connected to one side of the second threaded block, and two running plates are slidably connected to the side of the welding plate away from the second threaded block.

[0016] In one specific implementation, a clamping plate is fixedly connected to the side of the running plate away from the second threaded block, and the inner side of the clamping plate is slidably connected to one end of the guide rod. The surface of the clamping plate is in contact with the front and rear sides of the lifting device body.

[0017] The beneficial effects of this application are: through the coordinated operation of the clamping component and the anti-sway component, the three-jaw lifting device achieves flexible adjustment in the lateral direction, solving the problem that traditional three-jaw lifting devices require manual adjustment of orientation when facing objects clamped in different positions. The clamping component has excellent self-centering performance, enabling it to quickly and stably clamp circular, near-circular, or other regular-shaped workpieces, and is especially suitable for efficient gripping and placement of stacked or densely arranged objects.

[0018] During clamping, the clamping assembly can achieve overall displacement through lateral adjustment, thereby adapting to clamping requirements at different lateral positions and significantly improving work efficiency and ease of operation. Furthermore, after clamping is complete, the anti-sway component immediately takes effect, effectively suppressing any swaying or displacement of the clamping assembly and the clamped object during hoisting and lifting.

[0019] The anti-sway component mainly consists of a guide rod, a limit plate, a cylinder, and a rotating rod. It provides real-time limiting support to the clamping components during the lifting process, preventing instability caused by external vibrations, uneven lifting speeds, or other factors. Furthermore, the component is adjustable to accommodate the width of the workpiece, ensuring reliable clamping and stable lifting for workpieces of different sizes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of the present utility model;

[0022] Figure 2 This is a three-dimensional schematic diagram of the disassembled installation box structure according to an embodiment of the present utility model;

[0023] Figure 3 This is a three-dimensional schematic diagram of the disassembled structure of the protective box according to an embodiment of the present utility model;

[0024] Figure 4 This is a three-dimensional schematic diagram of the lifting device body structure according to an embodiment of the present utility model;

[0025] Figure 5 This is a three-dimensional schematic diagram of the first threaded block structure according to an embodiment of the present utility model;

[0026] Figure 6 This is a three-dimensional schematic diagram of the clamping plate structure according to an embodiment of the present utility model;

[0027] Figure 7 This is a three-dimensional schematic diagram of the push plate structure according to an embodiment of the present utility model;

[0028] Figure 8 This is an embodiment of the present utility model. Figure 3 Enlarged structural diagram at point A in the middle.

[0029] Icons: 1. Gantry crane; 2. Traction component; 3. Clamping assembly; 31. Lifting device body; 32. First threaded rod; 33. First threaded block; 34. Mounting box; 35. First cylinder; 36. Push plate; 37. Connecting plate; 38. Moving plate; 39. Protective box; 310. First motor; 4. Anti-sway assembly; 41. Long box; 42. Second threaded rod; 43. Second motor; 44. Second threaded block; 45. Positioning frame; 46. Second cylinder; 47. Rotating rod; 48. Limiting plate; 49. Round rod; 410. Guide rod; 411. Welding plate; 412. Running plate; 413. Clamping plate; 414. Welding box. Detailed Implementation

[0030] Existing three-jaw lifting devices typically connect to gantry cranes via padlocks or hooks. When clamping workpieces in different lateral positions, manual adjustment of direction is required, which is inconvenient and inefficient. Furthermore, vibrations or uneven lifting during the lifting process can cause swaying, affecting operational stability and posing safety hazards. Therefore, the inventors have developed an inward-retracting three-jaw self-centering lifting device. Through the synergistic action of the clamping and anti-sway components, the three-jaw lifting device achieves flexible adjustment in the lateral direction, adapting to the clamping needs of workpieces in different positions. The clamping components have a self-centering function, efficiently gripping regularly shaped workpieces, while the anti-sway component provides limiting support during lifting, preventing swaying caused by vibrations or uneven lifting, thus improving operational stability and safety, and solving the aforementioned defects.

[0031] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] Please refer to Figures 1 to 8This utility model embodiment provides an inward-retracting three-jaw self-centering lifting device, including a gantry crane 1. A traction component 2 is installed on the top of the inner side of the gantry crane 1. The traction component 2 includes a clamping assembly 3, which includes a lifting device body 31 and a mounting box 34. The traction component 2 is connected to a padlock on the top of the lifting device body 31 via a hook lock to achieve the lifting purpose. A first cylinder 35 is fixedly connected to the inner cavity of the mounting box 34, and a push plate 36 is fixedly connected to the output end of the first cylinder 35. Anti-sway components 4 are provided on both the left and right sides of the inner side of the gantry crane 1. The anti-sway components 4 include two long boxes 41, two rotating rods 47 and a positioning frame 45. The two long boxes 41 are fixedly connected to the left and right sides of the inner side of the gantry crane 1. Two limiting plates 48 are fixedly connected to the surface of the rotating rods 47. Two guide rods 410 are provided through the opposite side of the two limiting plates 48. The area of ​​the guide rods 410 and the limiting plates 48 through the contact area is fixedly connected to each other. A second cylinder 46 is fixedly connected to the rear side of the positioning frame 45.

[0033] Please refer to Figures 2 to 8 The output end of the second cylinder 46 extends through the inner side of the positioning frame 45 and is fixedly connected to a round rod 49. Both ends of the round rod 49 are slidably connected to the inner side of the limiting plate 48. A first threaded rod 32 is rotatably connected to the inner cavity of the lifting device body 31. The outer surface of the first threaded rod 32 is provided with external threads. Two first threaded blocks 33 are threadedly connected to the outer surface of the first threaded rod 32. The bottom of the first threaded blocks 33 is slidably connected to the bottom of the inner cavity of the lifting device body 31. The area of ​​the first threaded blocks 33 that contacts the first threaded rod 32 is provided with a matching internal thread. Through cavities are provided on both the front and rear sides of the lifting device body 31 to facilitate the movement of the first threaded blocks 33. The bottom of the first threaded blocks 33 is installed with the top of the mounting box 34. A threaded block 33 has a padlock and hook at its bottom that are compatible with the top of the mounting box 34. Twelve connecting plates 37 are fixedly connected to the surface of the push plate 36 and the mounting box 34. The side of the connecting plates 37 away from the push plate 36 and the mounting box 34 is rotatably connected to a moving plate 38. There are three moving plates 38 in total. One side of the moving plate 38 is equipped with an arc-shaped gripper to facilitate clamping and lifting of goods. A protective box 39 is fixedly connected to the left side of the lifting device body 31. A first motor 310 is fixedly connected to the inner cavity of the protective box 39. The output shaft of the first motor 310 is fixedly connected to the left end of the first threaded rod 32. A second threaded rod 42 is rotatably connected to the inner cavity of the long box 41. The surface of the second threaded rod 42 is provided with external threads.

[0034] Please refer to Figures 3 to 8Welding boxes 414 are fixedly connected to the left and right sides of the top of the gantry crane 1. A second motor 43 is fixedly connected to the inner cavity of the welding box 414. The output shaft of the second motor 43 is fixedly connected to the top end of the second threaded rod 42. A second threaded block 44 is threadedly connected to the surface of the second threaded rod 42. The area of ​​the second threaded block 44 in contact with the second threaded rod 42 is provided with a matching internal thread. The front and rear sides of the second threaded block 44 are slidably connected to the front and rear sides of the inner cavity of the long box 41. One side of the second threaded block 44 is fixedly connected to the surface of the positioning frame 45. One side of the long box 41 has an opening for easy positioning. The positioning cavity of the movable frame 45 is rotatably connected to the left and right ends of the rotating rod 47. Two guide rods 410 are located at the top and bottom of the positioning frame 45. A welding plate 411 is fixedly connected to one side of the second threaded block 44. Two running plates 412 are slidably connected to the side of the welding plate 411 away from the second threaded block 44. A clamping plate 413 is fixedly connected to the side of the running plate 412 away from the second threaded block 44. The inner side of the clamping plate 413 is slidably connected to one end of the guide rod 410. The surface of the clamping plate 413 is in contact with the front and rear sides of the lifting body 31.

[0035] Specifically, when clamping an object, the first cylinder 35 is activated, which pushes the push plate 36 downward. During the movement of the push plate 36, the connecting plate 37 drives the three moving plates 38 to move in opposite directions, thereby the moving plates 38 perform the clamping operation on the object.

[0036] Before clamping, the first motor 310 can be started, which drives the first threaded rod 32 to rotate. The first threaded rod 32 drives the two first threaded blocks 33 to move in opposite or opposite directions through threaded transmission, thereby realizing the adjustment and positioning of the lateral position of the clamped object and improving the clamping flexibility and adaptability.

[0037] After clamping is completed, the second cylinder 46 is activated, which pushes the round rod 49 to move. The round rod 49 pushes the limiting plate 48 to swing around the rotating rod 47 as a fulcrum. The limiting plate 48 further drives the guide rod 410 to move, thereby pushing the two clamping plates 413 to move in opposite or opposite directions, realizing the limiting clamping of the lifting device body 31 of different widths, effectively preventing the lifting device body 31 from shaking during the lifting process.

[0038] Furthermore, during the up-and-down movement of the lifting device body 31, the second motor 43 can be activated. The second motor 43 drives the second threaded rod 42 to rotate, which in turn drives the second threaded block 44 to move up and down in the vertical direction. The second threaded block 44 drives the clamping plate 413 to move synchronously, thereby continuously limiting and clamping the lifting device body 31 during its movement, further improving the stability and safety of the lifting process.

[0039] In summary, the working principle of the inward-retracting three-jaw self-centering lifting device of this utility model embodiment is as follows: First, when the user moves the gantry crane 1 to the application scene where the lifting is required, the user clamps the object using the clamping component 3. During the clamping process, the anti-sway component 4 is activated to prevent the clamping component 3 from swaying, thereby improving the stability of the clamping component 3 during the clamping process. Furthermore, when placing the object, the clamping component 3 can be activated for lateral adjustment, which facilitates stacking in different locations and makes it convenient to use.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A retractable three-jaw self-centering lifting device, characterized in that, The gantry crane (1) includes a traction component (2) installed on the top of the inner side of the gantry crane (1). The traction component (2) includes a clamping assembly (3). The clamping assembly (3) includes a lifting body (31) and a mounting box (34). A first cylinder (35) is fixedly connected to the inner cavity of the mounting box (34). A push plate (36) is fixedly connected to the output end of the first cylinder (35). The gantry crane (1) is equipped with anti-sway components (4) on both the left and right sides of its inner side. The anti-sway components (4) include two long boxes (41), two rotating rods (47) and a positioning frame (45). Two limiting plates (48) are fixedly connected to the surface of the rotating rods (47). Two guide rods (410) are provided through the opposite side of the two limiting plates (48). A second cylinder (46) is fixedly connected to the rear side of the positioning frame (45). The output end of the second cylinder (46) extends through to the inner side of the positioning frame (45) and is fixedly connected to a round rod (49). The two ends of the round rod (49) are slidably connected to the inner side of the limiting plate (48).

2. The inward-retracting three-jaw self-centering lifting device according to claim 1, characterized in that, The inner cavity of the lifting device body (31) is rotatably connected to a first threaded rod (32), and the outer surface of the first threaded rod (32) is threadedly connected to two first threaded blocks (33), and the bottom of the first threaded blocks (33) is slidably connected to the bottom of the inner cavity of the lifting device body (31).

3. The inward-retracting three-jaw self-centering lifting device according to claim 2, characterized in that, The bottom of the first threaded block (33) is installed with the top of the mounting box (34). Twelve connecting plates (37) are fixedly connected to the surface of the push plate (36) and the mounting box (34). A movable plate (38) is rotatably connected to the side of the connecting plate (37) away from the push plate (36) and the mounting box (34).

4. The inward-retracting three-jaw self-centering lifting device according to claim 3, characterized in that, A protective box (39) is fixedly connected to the left side of the lifting device body (31), and a first motor (310) is fixedly connected to the inner cavity of the protective box (39). The output shaft of the first motor (310) is fixedly connected to the left end of the first threaded rod (32).

5. The inward-retracting three-jaw self-centering lifting device according to claim 1, characterized in that, The inner cavity of the long box (41) is rotatably connected to a second threaded rod (42), and welding boxes (414) are fixedly connected to the left and right sides of the top of the gantry crane (1).

6. The inward-retracting three-jaw self-centering lifting device according to claim 5, characterized in that, The inner cavity of the welding box (414) is fixedly connected to a second motor (43), and the output shaft of the second motor (43) is fixedly connected to the top end of the second threaded rod (42).

7. The inward-retracting three-jaw self-centering lifting device according to claim 6, characterized in that, The second threaded rod (42) has a second threaded block (44) threadedly connected to its surface, and the front and rear sides of the second threaded block (44) are slidably connected to the front and rear sides of the inner cavity of the long box (41).

8. The inward-retracting three-jaw self-centering lifting device according to claim 7, characterized in that, One side of the second threaded block (44) is fixedly connected to the surface of the positioning frame (45), and the inner cavity of the positioning frame (45) is rotatably connected to the left and right ends of the rotating rod (47).

9. A retractable three-jaw self-centering lifting device according to claim 8, characterized in that, A welding plate (411) is fixedly connected to one side of the second threaded block (44), and two running plates (412) are slidably connected to the side of the welding plate (411) away from the second threaded block (44).

10. A retractable three-jaw self-centering lifting device according to claim 9, characterized in that, A clamping plate (413) is fixedly connected to the side of the running plate (412) away from the second threaded block (44), and the inner side of the clamping plate (413) is slidably connected to one end of the guide rod (410). The surface of the clamping plate (413) is in contact with the front and rear sides of the lifting body (31).

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