A gantry lifting structure

Abstract

This utility model belongs to the technical field of lifting equipment, and particularly relates to a gantry lifting structure, including a base, a moving component, a first lifting mechanism, a second lifting mechanism, a drive mechanism, and a connecting component. The first lifting mechanism includes a first upright, a limiting component, a first lifting component, and a first support component. The second lifting mechanism includes a second upright, a second lifting component, and a second support component. The gantry lifting structure provided by this application allows adjustment of the distance between the first and second lifting mechanisms via the moving component, thereby adjusting the lifting distance. When lifting large automotive waste, the distance between the two can be increased; when lifting small automotive waste, the distance can be decreased. This solves the problem of fixed lifting distance in traditional devices, adapts to the lifting needs of automotive waste of different sizes, and eliminates the need to change equipment or use auxiliary tools, thus improving the versatility and working efficiency of the device.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment technology, and in particular relates to a gantry lifting structure. Background Technology

[0002] Gantry cranes, as a common type of lifting equipment, are widely used in fields such as automobile repair, cargo handling, and industrial assembly. Their main function is to lift and raise objects using lifting mechanisms on both sides to adjust their position.

[0003] Traditional gantry lifting devices have some shortcomings in their structural design: the lifting mechanisms on both sides are usually fixedly mounted on the base, and the lifting distance between them cannot be adjusted. When the object to be lifted is large, the distance between the lifting mechanisms on both sides is too narrow, making it impossible to place the object smoothly. This necessitates replacing the gantry lifting device with one of different specifications, increasing equipment costs, extending operation time, and reducing work efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a gantry lifting structure, which aims to solve the technical problem in the prior art that when the object to be lifted is large, it is necessary to replace the gantry lifting device with a different specification, which increases equipment costs, prolongs operation time, and reduces work efficiency.

[0005] To achieve the above objectives, the gantry lifting structure provided in this embodiment includes a base, a movable component, a first lifting mechanism, a second lifting mechanism, a drive mechanism, and a connecting component. The movable component is disposed on the base. The first lifting mechanism is disposed on the base and the movable component, and the distance between the movable component and the second lifting mechanism is adjusted by the movable component. The second lifting mechanism is disposed on the base and is located on one side of the movable component. The drive mechanism is disposed on the first lifting mechanism. The connecting component is disposed between the first lifting mechanism and the second lifting mechanism and is connected to the first lifting mechanism and the second lifting mechanism, respectively.

[0006] The first lifting mechanism includes a first upright, a limiting member, a first lifting assembly, and a first support assembly. The first upright is disposed on the moving assembly. The limiting member is sequentially disposed on the first upright and the base. The first lifting assembly is disposed on the side of the first upright. The first support assembly is disposed on the first lifting assembly and is movably disposed on the first upright through the first lifting assembly.

[0007] The second lifting mechanism includes a second upright, a second lifting component, and a second support component. The second upright is disposed on the base, the second lifting component is disposed on the side of the second upright, and the second support component is disposed on the second lifting component and is movably disposed on the second upright through the second lifting component. The connecting component is connected to the first support component and the second support component respectively.

[0008] As an optional embodiment of this utility model, the moving component includes a moving slide rail and a moving slider. The moving slide rail is fixedly connected to the base, and the moving slider is slidably connected to the moving slide rail. The first upright is fixedly connected to the moving slider. There are two moving slide rails, which are arranged parallel and spaced apart. The number of moving sliders is the same as the number of moving slide rails.

[0009] As an optional solution of this utility model, the limiting member is a limiting bolt, which passes through the first upright and is threadedly connected to the base.

[0010] As an optional solution of this utility model, the first lifting assembly includes a first lifting screw, a first lifting nut, a first lifting frame, a first lifting slider, and a first lifting slide rail. The first lifting screw is rotatably connected to the first upright and connected to the driving mechanism. The first lifting nut is threadedly connected to the first lifting screw. The first lifting frame is fixedly connected to the first lifting nut and the first lifting slider respectively. The first lifting slider is slidably connected to the first lifting slide rail, and the first lifting slide rail is fixedly connected to the first upright. There are two of each of the first lifting slider and the first lifting slide rail.

[0011] As an optional solution of this utility model, the first support component includes a first support left arm and a first support right arm, both of which are hinged to the first lifting frame and to the connecting component.

[0012] As an optional embodiment of this utility model, the second lifting assembly includes a second lifting guide rod, a second lifting guide cylinder, a second lifting frame, a second lifting slider, and a second lifting slide rail. The second lifting guide rod is fixedly inserted into the second upright frame, the second lifting guide cylinder is movably sleeved on the second lifting guide rod, the second lifting frame is fixedly connected to the second lifting guide cylinder and the second lifting slider respectively, the second lifting slider is slidably connected to the second lifting slide rail, and the second lifting slide rail is fixedly connected to the second upright frame; two of each of the second lifting slider and the second lifting slide rail are provided.

[0013] As an optional embodiment of this utility model, the second support component includes a second support left arm and a second support right arm, both of which are hinged to the second lifting frame and to the connecting component.

[0014] As an optional solution of this utility model, the driving mechanism includes a drive motor and a gear set. The drive motor is fixedly connected to the top of the first upright, and the gear set is fixedly connected to the drive motor and the first lifting screw respectively.

[0015] As an optional embodiment of this utility model, the connecting assembly includes a left connecting rod and a right connecting rod. The left connecting rod is hinged to the first supporting left arm and the second supporting left arm, respectively; the right connecting rod is hinged to the first supporting right arm and the second supporting right arm, respectively.

[0016] The above-mentioned technical solutions in the gantry lifting structure provided in this embodiment of the utility model have at least one of the following technical effects:

[0017] The gantry lifting structure provided in this application allows for adjustment of the distance between the first and second lifting mechanisms via a movable component, thereby adjusting the lifting distance. When lifting large objects, the distance between the two mechanisms can be increased; when lifting small objects, the distance can be decreased. This solves the problem of fixed lifting distance in traditional devices, adapts to the lifting needs of objects of different sizes, and does not require equipment replacement or auxiliary tools, thus improving the versatility and work efficiency of the device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A perspective view of the gantry lifting structure provided for an embodiment of this utility model.

[0020] Figure 2 The perspective view of the gantry lifting structure provided in the embodiment of this utility model, omitting the moving components and connecting components.

[0021] Figure 3 for Figure 1 A magnified view of part A in the image.

[0022] Figure 4 for Figure 2 A magnified view of part B in the image.

[0023] The following are the labeling elements in the figure:

[0024] 1. Base; 2. Moving component; 3. First lifting mechanism; 4. Second lifting mechanism; 5. Drive mechanism; 6. Connecting component;

[0025] 21. Move the slide rail; 22. Move the slider;

[0026] 31. First upright; 32. Limit bolt; 33. First lifting assembly; 34. First support assembly;

[0027] 41. Second upright; 42. Second lifting assembly; 43. Second support assembly;

[0028] 51. Drive motor; 52. Gear set;

[0029] 61. Left connecting rod; 62. Right connecting rod;

[0030] 331. First lifting screw; 332. First lifting frame; 333. First lifting slider; 334. First lifting slide rail; 335. First lifting nut;

[0031] 341. First supporting left arm; 342. First supporting right arm;

[0032] 421. Second lifting guide rod; 422. Second lifting guide cylinder; 423. Second lifting frame; 424. Second lifting slider; 425. Second lifting slide rail;

[0033] 431. Second support left arm; 432. Second support right arm. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0035] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not 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, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0038] In one embodiment of this utility model, such as Figures 1-4 As shown, a gantry lifting structure is provided, including a base 1, a moving component 2, a first lifting mechanism 3, a second lifting mechanism 4, a drive mechanism 5, and a connecting component 6. The moving component 2 is disposed on the base 1. The first lifting mechanism 3 is disposed on both the base 1 and the moving component 2, and the distance between the moving component 2 and the second lifting mechanism 4 is adjusted by the moving component 2. The second lifting mechanism 4 is disposed on the base 1 and is located on one side of the moving component 2. The drive mechanism 5 is disposed on the first lifting mechanism 3. The connecting component 6 is disposed between the first lifting mechanism 3 and the second lifting mechanism 4, and is connected to both the first lifting mechanism 3 and the second lifting mechanism 4.

[0039] The first lifting mechanism 3 includes a first upright 31, a limiting member, a first lifting assembly 33, and a first support assembly 34. The first upright 31 is disposed on the moving assembly 2. The limiting member is disposed sequentially on the first upright 31 and the base 1. The first lifting assembly 33 is disposed on the side of the first upright 31. The first support assembly 34 is disposed on the first lifting assembly 33 and is movably disposed on the first upright 31 through the first lifting assembly 33.

[0040] The second lifting mechanism 4 includes a second upright 41, a second lifting assembly 42, and a second support assembly 43. The second upright 41 is disposed on the base 1, the second lifting assembly 42 is disposed on the side of the second upright 41, and the second support assembly 43 is disposed on the second lifting assembly 42 and is movably disposed on the second upright 41 via the second lifting assembly 42. The connecting assembly 6 is connected to the first support assembly 34 and the second support assembly 43 respectively.

[0041] The gantry lifting structure provided in this application allows for adjustment of the distance between the first lifting mechanism 3 and the second lifting mechanism 4 via the movable component 2, thereby adjusting the lifting distance. When lifting large objects, the distance between the two can be increased; when lifting small objects, the distance can be reduced. This solves the problem of fixed lifting distance in traditional devices, adapts to the lifting needs of objects of different sizes, and does not require equipment replacement or auxiliary tools, thus improving the versatility and work efficiency of the device.

[0042] In another embodiment of this utility model, the movable component 2 includes a movable slide rail 21 and a movable slider 22. The movable slide rail 21 is fixedly connected to the base 1, and the movable slider 22 is slidably connected to the movable slide rail 21. The first upright 31 is fixedly connected to the movable slider 22. Two movable slide rails 21 are provided, arranged parallel and spaced apart. The number of movable sliders 22 is the same as the number of movable slide rails 21. The limiting member is a limiting bolt 32, which passes through the first upright 31 and is threadedly connected to the base 1. The two parallel and spaced movable slide rails 21 in the movable component 2 are fixed on the base 1, providing a stable sliding track for the movable slider 22. The movable slider 22 is slidably connected to the movable slide rail 21, and the first upright 31 is fixed on the movable slider 22. By sliding the movable slider 22 along the movable slide rail 21, the first upright 31 and the entire first lifting mechanism 3 can be moved, thereby flexibly adjusting the distance between the first lifting mechanism 3 and the second lifting mechanism 4 to adapt to the lifting needs of objects of different sizes. Meanwhile, the two movable slide rails 21 and the corresponding number of movable sliders 22 work together to evenly bear the weight of the first lifting mechanism 3, ensuring the stability of the movement process and preventing the first lifting mechanism 3 from tilting or swaying during movement. The limiting bolts 32 used in the limiting component pass through the first upright 31 and are threadedly connected to the base 1. After the first lifting mechanism 3 is adjusted to the appropriate position by the moving component 2, tightening the limiting bolts 32 can firmly fix the first upright 31 to the base 1, preventing the first lifting mechanism 3 from shifting due to force during the lifting and lifting process, ensuring a stable lifting distance, and guaranteeing the safety and reliability of the entire lifting operation. When it is necessary to readjust the lifting distance, simply loosening the limiting bolts 32 will release the fixation, making the operation convenient.

[0043] In another embodiment of this utility model, the first lifting assembly 33 includes a first lifting screw 331, a first lifting nut 335, a first lifting frame 332, a first lifting slider 333, and a first lifting slide rail 334. The first lifting screw 331 is rotatably connected to the first upright 31 and connected to the drive mechanism 5. The first lifting nut 335 is threadedly connected to the first lifting screw 331. The first lifting frame 332 is fixedly connected to the first lifting nut 335 and the first lifting slider 333, respectively. The first lifting slider 333 is slidably connected to the first lifting slide rail 334, and the first lifting slide rail 334 is fixedly connected to the first upright 31. Two of each of the first lifting slider 333 and the first lifting slide rail 334 are provided. The first support assembly 34 includes a first support left arm 341 and a first support right arm 342. Both the first support left arm 341 and the first support right arm 342 are hinged to the first lifting frame 332 and hinged to the connecting assembly 6.

[0044] The first lifting screw 331 is rotatably connected to the first upright 31 and to the drive mechanism 5, which drives it to rotate. The first lifting nut 335 is threadedly connected to the first lifting screw 331, and can move along the screw axis when the screw rotates. The first lifting frame 332 is fixedly connected to the lifting nut and the first lifting slider 333, and moves synchronously with the lifting nut. The two first lifting sliders 333 are slidably connected to the corresponding first lifting slide rails 334 (the slide rails are fixed to the first upright 31), which on the one hand provide guidance for the lifting frame to ensure stable lifting and lowering along the vertical direction of the upright and avoid deviation; on the other hand, they distribute the force on the lifting frame and improve the structural load-bearing capacity. The whole system uses a "screw-nut" transmission method to convert the rotational motion of the drive mechanism 5 into the linear lifting motion of the lifting frame, providing lifting power for the first support assembly 34. The left and right arms of the first support are hinged to the first lifting frame 332 and can rotate at a small angle to adapt to the inclination or curvature of the object support surface, ensuring stable contact with the object. Simultaneously, both arms are hinged to the connecting component 6, enabling the transmission of lifting force to the connecting component 6, which in turn drives the second support component 43 to move synchronously, achieving coordinated lifting and lowering of the two support structures. The two support arms form symmetrical lifting points, evenly bearing the weight of the object and preventing excessive force on a single point from causing the object to slip. They are key components that directly contact the object and perform the lifting function.

[0045] In another embodiment of this utility model, the second lifting assembly 42 includes a second lifting guide rod 421, a second lifting guide cylinder 422, a second lifting frame 423, a second lifting slider 424, and a second lifting slide rail 425. The second lifting guide rod 421 is fixedly inserted through the second upright 41, and the second lifting guide cylinder 422 is movably sleeved on the second lifting guide rod 421. The second lifting frame 423 is fixedly connected to the second lifting guide cylinder 422 and the second lifting slider 424, respectively. The second lifting slider 424 is slidably connected to the second lifting slide rail 425, and the second lifting slide rail 425 is fixedly connected to the second upright 41. Two of each of the second lifting slider 424 and the second lifting slide rail 425 are provided. The second support assembly 43 includes a second support left arm 431 and a second support right arm 432. Both the second support left arm 431 and the second support right arm 432 are hinged to the second lifting frame 423 and hinged to the connecting assembly 6.

[0046] The second lifting guide rod 421 is fixedly inserted through the second upright 41, providing a fixed vertical support reference for the entire assembly. The second lifting guide cylinder 422 is movably sleeved on the second lifting guide rod 421 and can slide up and down along the guide rod, serving a guiding and stabilizing function. The second lifting frame 423 is fixedly connected to the second lifting guide cylinder 422 and the second lifting slider 424, and can move synchronously with the guide cylinder and slider. The two second lifting sliders 424 slide in cooperation with the corresponding second lifting slide rails 425 (fixed to the second upright 41), further enhancing the stability and guiding accuracy of the lifting frame's movement and preventing deviation or shaking during lifting.

[0047] The second lifting assembly 42, through the cooperation of the guide rod and guide cylinder, and the coordination of the slider and slide rail, provides a stable lifting track and support structure for the second support assembly 43. This ensures that the second support assembly 43, driven by the connecting assembly 6, can synchronously and smoothly complete the lifting action with the first support assembly 34, guaranteeing the balance during the lifting process. The second support left arm 431 and the second support right arm 432 are hinged to the second lifting frame 423, and can be rotated and adjusted to a certain extent according to the shape and placement angle of the object, improving the fit with the contact surface of the object and enhancing the stability of the lifting. At the same time, both are hinged to the connecting assembly 6, enabling them to receive power transmitted from the first support assembly 34 through the connecting assembly 6, achieving synchronous lifting with the first support assembly 34.

[0048] In another embodiment of this utility model, the drive mechanism 5 includes a drive motor 51 and a gear set 52. The drive motor 51 is fixedly connected to the top of the first upright 31, and the gear set 52 is fixedly connected to the drive motor 51 and the first lifting screw 331 respectively. The drive mechanism 5 is the power source of the entire gantry lifting structure, and its core function is to provide power for the lifting action of the first lifting assembly 33. The drive motor 51 is fixed to the top of the first upright 31 and serves as a power output source, converting electrical energy into mechanical energy and outputting rotational motion. The gear set 52 is fixedly connected to the drive motor 51 and the first lifting screw 331 respectively. On the one hand, it changes the direction and speed of power transmission through gear transmission; on the other hand, it utilizes the characteristics of gear meshing to stably transmit torque, efficiently transmitting the rotational power of the drive motor 51 to the first lifting screw 331, driving the first lifting screw 331 to rotate. Then, through the cooperation of components such as the first lifting nut 335 and the first lifting frame 332, the lifting action of the first support assembly 34 is realized, and the second support assembly 43 is driven to move synchronously through the connecting assembly 6, ultimately completing the lifting or lowering operation of the object.

[0049] In another embodiment of this utility model, the connecting component 6 includes a left connecting rod 61 and a right connecting rod 62. The left connecting rod 61 is hinged to the first supporting left arm 341 and the second supporting left arm 431, respectively; the right connecting rod 62 is hinged to the first supporting right arm 342 and the second supporting right arm 432, respectively. The left connecting rod 61 and the right connecting rod 62 respectively connect the supporting arms on both sides. The left connecting rod 61 hinges the first supporting left arm 341 and the second supporting left arm 431, and the right connecting rod 62 hinges the first supporting right arm 342 and the second supporting right arm 432. This hinged structure can transmit force and motion. When the first supporting component 34 is raised and lowered by the drive mechanism 5, the motion is synchronously transmitted to the second supporting component 43 through the left connecting rod 61 and the right connecting rod 62, ensuring that the supporting arms on both sides maintain a coordinated raising and lowering state.

[0050] The gantry lifting structure provided in this application can be applied to automobile dismantling operations, and the working process is as follows:

[0051] Based on the size of the scrap car parts to be lifted, loosen the limiting piece (limiting bolt 32), push the first upright 31, and let the movable slider 22 slide along the movable slide rail 21, thereby adjusting the distance between the first lifting mechanism 3 and the second lifting mechanism 4. When the distance is appropriate, tighten the limiting bolt 32 to fix the first upright 31. Place the scrap car parts on the first support assembly 34 (first support left arm 341, first support right arm 342) and the second support assembly 43 (second support left arm 431, second support right arm 432), ensuring that the scrap car parts are placed stably. Start the drive motor 51, which drives the first lifting screw 331 to rotate through the gear set 52. When the first lifting screw 331 rotates, the first lifting nut 335, which is threaded to it, drives the first lifting frame 332 to move up or down, and the first lifting frame 332 drives the first support assembly 34 to rise and fall accordingly. Under the action of connecting components 6 (left connecting rod 61, right connecting rod 62), the first support component 34 drives the second support component 43 to rise and fall synchronously, thereby achieving smooth lifting and lowering of the vehicle waste. When the vehicle waste reaches the target position, the drive motor 51 is turned off, and the device stops working. If it is necessary to move the vehicle waste, the drive motor 51 can be restarted to adjust the height of the vehicle waste, or the above operation can be repeated after adjusting the lifting distance.

[0052] The gantry lifting structure provided in this application allows for adjustment of the distance between the first lifting mechanism 3 and the second lifting mechanism 4 via the movable component 2, thereby adjusting the lifting distance. When lifting large automotive waste, the distance between the two can be increased; when lifting small automotive waste, the distance can be reduced. This solves the problem of fixed lifting distance in traditional devices, adapts to the lifting needs of automotive waste of different sizes, and does not require equipment replacement or auxiliary tools, thus improving the versatility and work efficiency of the device.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portal lifting structure, characterized in that, The device includes a base, a movable component, a first lifting mechanism, a second lifting mechanism, a drive mechanism, and a connecting component. The movable component is disposed on the base. The first lifting mechanism is disposed on both the base and the movable component, and the distance between the movable component and the second lifting mechanism is adjusted by the movable component. The second lifting mechanism is disposed on the base and is located on one side of the movable component. The drive mechanism is disposed on the first lifting mechanism. The connecting component is disposed between the first lifting mechanism and the second lifting mechanism and is connected to both the first lifting mechanism and the second lifting mechanism. The first lifting mechanism includes a first upright, a limiting member, a first lifting assembly, and a first support assembly. The first upright is disposed on the moving assembly. The limiting member is sequentially disposed on the first upright and the base. The first lifting assembly is disposed on the side of the first upright. The first support assembly is disposed on the first lifting assembly and is movably disposed on the first upright through the first lifting assembly. The second lifting mechanism includes a second upright, a second lifting component, and a second support component. The second upright is disposed on the base, the second lifting component is disposed on the side of the second upright, and the second support component is disposed on the second lifting component and is movably disposed on the second upright through the second lifting component. The connecting component is connected to the first support component and the second support component respectively.

2. A portal lift structure as claimed in claim 1, wherein, The moving component includes a sliding rail and a sliding slider. The sliding rail is fixedly connected to the base, and the sliding slider is slidably connected to the sliding rail. The first upright is fixedly connected to the sliding slider. There are two sliding rails, which are parallel and spaced apart. The number of sliding sliders is the same as the number of sliding rails.

3. A portal lift structure as described in claim 1, wherein, The limiting component is a limiting bolt, which passes through the first upright and is threadedly connected to the base.

4. A portal lift structure as described in claim 1, wherein, The first lifting assembly includes a first lifting screw, a first lifting nut, a first lifting frame, a first lifting slider, and a first lifting slide rail. The first lifting screw is rotatably connected to the first upright and connected to the drive mechanism. The first lifting nut is threadedly connected to the first lifting screw. The first lifting frame is fixedly connected to the first lifting nut and the first lifting slider. The first lifting slider is slidably connected to the first lifting slide rail. The first lifting slide rail is fixedly connected to the first upright. There are two of each of the first lifting slider and the first lifting slide rail.

5. A portal lift structure as set forth in claim 4, wherein, The first support assembly includes a first support left arm and a first support right arm, both of which are hinged to the first lifting frame and to the connecting assembly.

6. A portal lift structure as claimed in claim 5, wherein, The second lifting assembly includes a second lifting guide rod, a second lifting guide cylinder, a second lifting frame, a second lifting slider, and a second lifting slide rail. The second lifting guide rod is fixedly inserted into the second upright frame, and the second lifting guide cylinder is movably sleeved on the second lifting guide rod. The second lifting frame is fixedly connected to the second lifting guide cylinder and the second lifting slider, respectively. The second lifting slider is slidably connected to the second lifting slide rail, and the second lifting slide rail is fixedly connected to the second upright frame. There are two of each of the second lifting slider and the second lifting slide rail.

7. A portal lift structure as set forth in claim 6, wherein, The second support assembly includes a second support left arm and a second support right arm, both of which are hinged to the second lifting frame and to the connecting assembly.

8. A portal lift structure as set forth in claim 4, wherein, The driving mechanism includes a drive motor and a gear set. The drive motor is fixedly connected to the top of the first upright, and the gear set is fixedly connected to the drive motor and the first lifting screw, respectively.

9. A portal lift structure as set forth in claim 7, wherein, The connecting assembly includes a left connecting rod and a right connecting rod. The left connecting rod is hinged to the first support left arm and the second support left arm, respectively. The right connecting rod is hinged to the first support right arm and the second support right arm, respectively.

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