An adaptive adjustment lightweight frame structure

Abstract

The present application relates to the technical field of cross-truck, particularly relates to a lightweight frame structure with self-adaptive adjustment, which comprises a frame body, a hoisting assembly and a wheel assembly, the hoisting assembly is connected to the frame body, the wheel assembly has four in number, and the four wheel assemblies are respectively arranged at the four corners below the frame body, wherein three wheel assemblies are directly connected with the frame body, and the other wheel assembly is connected with the frame body through a vertical traction assembly. The vertical traction assembly is arranged, when stacking containers, one of the wheel assemblies can be lifted to be flush along the upper surface of the container, so that when stacking a batch of containers, only a gap is left between the adjacent two containers for the auxiliary hoisting rope of the hoisting assembly to move, and a passageway is not needed for the wheel assembly to move, so that the stacking density of the containers can be improved, and the storage space can be maximally utilized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of straddle carrier, in particular to a self-adaptive light-weight frame structure. BACKGROUND

[0002] Straddle carrier is a large-scale container handling equipment widely used in ports, railway stations and logistics centers. The most remarkable feature of straddle carrier is its straddle structure. The high legs on both sides can straddle the container stacks and directly work above the containers, without the need for additional passage space, greatly improving the space utilization of the yard.

[0003] When working, the portal frame of the straddle carrier straddles above the containers. Through the precise hydraulic system or electric lifting device, the container special lifting tool locks the rotating lock hole at the four corners of the container body, then lifts the container, and realizes the whole process operation of "grabbing-transporting-stacking".

[0004] However, the existing straddle carrier has the following problems when in use: the existence of the legs on both sides of the straddle carrier requires extra space for the movement of the legs on both sides of the straddle carrier when the goods are stacked, which inevitably leads to the fact that the containers cannot be densely stacked, so as not to maximize the utilization of storage space. SUMMARY

[0005] Therefore, it is necessary to provide a self-adaptive light-weight frame structure to solve the problem that the existing straddle carrier cannot densely stack containers.

[0006] The above-mentioned purpose is realized by the following technical scheme:

[0007] A self-adaptive light-weight frame structure comprises:

[0008] a frame body;

[0009] a lifting assembly connected to the frame body;

[0010] four wheel assemblies, three of which are directly connected to the frame body, and the other is connected to the frame body through a vertical traction assembly for traction and movement of the connected wheel assembly in the vertical direction.

[0011] Preferably, the wheel assembly comprises a wheel body, a wheel frame and a support column, the wheel body is rotatably arranged on the wheel frame, the support column is vertically arranged, the lower end of the support column is rotatably connected to the wheel frame, and the upper end of the support column is connected to the frame body. The support columns corresponding to the three wheel assemblies are fixedly arranged on the frame body, and the support column corresponding to the other wheel assembly is slidably arranged on the frame body.

[0012] Preferably, the vertical traction assembly includes a rack, a first gear, and a drive source. The rack is disposed on the side of a slidable support column, the first gear is rotatably disposed on the frame and meshes with the rack, and the drive source is disposed on the frame and is poweredly connected to the first gear to drive the first gear to rotate circumferentially.

[0013] Preferably, the drive source includes a linear actuator, a toothed belt, a second gear, and an elastic element. The second gear is coaxially and fixedly connected to the first gear, and the diameter of the second gear is larger than the diameter of the first gear. The linear actuator is mounted on the frame. One end of the toothed belt is fixedly connected to the movable end of the linear actuator, and the other end of the toothed belt is connected to the elastic element. The second gear meshes with the toothed belt. The end of the elastic element away from the toothed belt is mounted on the frame, and the elastic element is configured to extend along the axis of the movable end of the linear actuator.

[0014] Preferably, the linear execution unit is any type of execution unit capable of outputting linear motion.

[0015] Preferably, the movable end of the linear execution unit is further provided with a locking pin, and the support column is provided with a locking hole;

[0016] When the wheel corresponding to the sliding wheel assembly touches the ground, the locking pin and the locking hole engage with each other.

[0017] Preferably, the adaptive lightweight frame structure further includes a center of gravity adjustment component, which is mounted on the frame and connected to the vertical traction component, for adaptively reducing the center of gravity height of the frame structure after the vertical traction component pulls the wheel assembly up.

[0018] Preferably, the center of gravity adjustment assembly includes a guide rail, a counterweight, a guide wheel, a counterweight cable, and a roller. The roller is coaxially and fixedly connected to the second gear. One end of the counterweight cable is wound on the roller, and the other end of the counterweight cable is connected to the counterweight. The guide wheel is rotatably mounted on the frame, and the counterweight cable is drive-connected to the guide wheel. The guide rail is mounted on the frame, and the extension line of the guide rail is set at an angle to the horizontal plane. The counterweight is slidably connected to the inner side of the guide rail.

[0019] Preferably, the guide wheel can also move horizontally, thereby causing the counterweight to slide downward along the guide rail under its own weight.

[0020] Preferably, the guide rail is detachably mounted on the frame.

[0021] The beneficial effects of this invention are:

[0022] This invention incorporates a vertical traction component. When stacking containers, one of the wheel components can be lifted to be flush with the top surface of the container. Thus, when stacking a batch of containers, only a gap is needed between adjacent containers for the movement of the auxiliary lifting rope of the hoisting component, without the need for an aisle for the wheel component to move. Therefore, the stacking density of containers can be increased, maximizing the utilization of storage space. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an adaptive and lightweight vehicle frame structure according to the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle;

[0025] Figure 3 This is a side view schematic diagram of an adaptively adjustable lightweight vehicle frame structure according to the present invention;

[0026] Figure 4 for Figure 3 BB section view;

[0027] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point C;

[0028] Figure 6 This is a rear view of an adaptively adjustable lightweight frame structure according to the present invention.

[0029] Figure 7 This is a schematic diagram of the rack state of an adaptively adjustable lightweight frame according to the present invention.

[0030] in:

[0031] 100. Frame;

[0032] 200. Lifting components;

[0033] 300. Wheel assembly; 310. Wheel body; 320. Wheel frame; 330. Support column; 331. Locking hole;

[0034] 400. Vertical traction assembly; 410. Rack; 420. First gear; 430. Drive source;

[0035] 431. Linear actuator; 432. Toothed belt; 433. Second gear; 434. Elastic element; 435. Locking pin;

[0036] 500. Center of gravity adjustment assembly; 510. Guide rail; 520. Counterweight block; 530. Guide wheel; 540. Counterweight cable; 550. Winding roller;

[0037] 600, containers. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] like Figures 1 to 7 As shown, an adaptive lightweight frame structure is used for lifting a container 600. The adaptive lightweight frame structure includes a frame 100, a lifting assembly 200, and a wheel assembly 300. The lifting assembly 200 is connected to the frame 100. There are four wheel assemblies 300, which are respectively located at the four corners below the frame 100. Three of the wheel assemblies 300 are directly connected to the frame 100, and the other wheel assembly 300 is connected to the frame 100 by a vertical traction assembly 400. The vertical traction assembly 400 is used to traction the wheel assembly 300 connected to it to move in the vertical direction.

[0042] It should be noted that the existing structure can be used for the lifting assembly 200. The existing lifting assembly 200 includes hydraulic cylinders, guide wheels, main lifting ropes, rectangular lifting frames, and auxiliary lifting ropes. There are two hydraulic cylinders, which are respectively set on both sides of the frame 100, and the axes of the hydraulic cylinders are horizontal. There are two main lifting ropes, one end of which is connected to the movable end of the corresponding hydraulic cylinder, and the other end of which is forked and connected to the upper four corners of the rectangular lifting frame. There are multiple guide wheels, all set on both sides of the frame 100, for guiding and supporting the main lifting ropes. There are four auxiliary lifting ropes, which are respectively set at the lower four corners of the rectangular lifting ropes. The auxiliary lifting ropes are equipped with hooks for connecting to the turnlock holes at the four corners of the container 600.

[0043] When stacking containers 600, workers control the hoisting assembly 200 to lift the first container 600. Then, the wheel assembly 300 moves the frame 100, transporting the first container 600 to the stacking position. Next, the first container 600 is lowered, and the frame 100 is moved again. The hoisting assembly 200 then lifts the second container 600 to the stacking position, positioning the vertically movable wheel assembly 300 to the side of the already stacked container 600. When the vertically movable wheel assembly 300 approaches the already stacked container 600, the vertical traction assembly 400 is activated, pulling the wheel assembly 300 upwards until its height is level with the top surface of the container 600. Then, the wheel assembly... Component 300 causes the frame 100 to move along the length of the container 600 to be stacked. At this time, the three wheel assemblies 300 fixedly connected to the frame 100 move on the ground, and the raised wheel assemblies 300 move on the upper surface of the already stacked container 600. When the two ends of the container 600 to be stacked are aligned with the already stacked container 600, the wheel assemblies 300 stop moving. Next, the container 600 is lowered by the hoisting component 200. At this time, only a gap is left between two adjacent containers 600 for the movement of the auxiliary hoisting rope of the hoisting component 200, and no aisle is needed for the wheel assemblies 300 to move. Therefore, the stacking density of the containers 600 can be increased, so that the storage space is maximized. The operation steps for stacking the third and subsequent containers 600 are the same as those for stacking the second container, and will not be repeated here.

[0044] It should also be noted that the adaptively adjustable lightweight frame structure provided by this invention is suitable for single-layer stacking applications of container 600.

[0045] In a further embodiment, such as Figure 1As shown, the wheel assembly 300 includes a wheel body 310, a wheel frame 320, and a support column 330. The wheel body 310 is rotatably mounted on the wheel frame 320, and the support column 330 is vertically arranged. The lower end of the support column 330 is rotatably connected to the wheel frame 320, and the upper end of the support column 330 is connected to the frame 100. The support columns 330 corresponding to three wheel assemblies 300 are fixedly mounted on the frame 100, and the support column 330 corresponding to another wheel assembly 300 is slidably mounted on the frame 100.

[0046] When it is necessary to lift the wheel assembly 300, the corresponding support column 330 moves vertically upward. At this time, the support column 330 drives the wheel body 310 to move upward synchronously through the wheel frame 320 until the wheel body 310 contacts the upper surface of the adjacent container 600.

[0047] Furthermore, to reduce wheel pressure, multiple wheel bodies 310 can be coaxially installed on each wheel frame 320, thereby preventing damage to the wheel bodies 310 due to excessive weight of the container 600 being lifted. Specifically, the wheel bodies 310 can be made of polyurethane-filled solid tires, which can effectively prevent damage or tire blowouts caused by excessive weight of the container 600 being lifted, thus increasing the safety of equipment operation.

[0048] Furthermore, the wheel assembly 300 is also connected to the steering assembly, which is used to drive the wheel assembly 300 to steer. Specifically, the steering assembly includes a steering cylinder and a connecting rod. For the three wheel assemblies 300 fixedly connected to the frame 100, the cylinder of the corresponding steering cylinder is fixedly mounted on the support column 330. For the wheel assembly 300 slidably connected to the frame 100, the cylinder of the corresponding steering cylinder is mounted on the frame 100 and slidably engaged with the support column 330. The extended end of the steering cylinder is hinged to the connecting rod, and the other end of the connecting rod is hinged to the wheel frame 320. This allows the steering cylinder to drive the wheel frame 320 to rotate, thereby adjusting the rotation direction of the adaptive lightweight frame structure.

[0049] Furthermore, the frame 100 is also equipped with a power assembly, which is used to provide power. The power assembly includes a diesel internal combustion engine, which is connected to a hydraulic pump. The hydraulic pump is connected to a hydraulic oil tank assembly. The diesel internal combustion engine drives the hydraulic pump to operate, and the hydraulic pump supplies hydraulic oil to the steering cylinder through the hydraulic oil tank assembly to drive the steering cylinder to rotate.

[0050] Furthermore, the wheel body 310 is connected to a drive pump, which is connected to a hydraulic oil tank assembly. The hydraulic oil tank assembly supplies hydraulic oil to the drive pump, which drives the drive pump to rotate, thereby driving the wheel body 310 to rotate.

[0051] In a further embodiment, such as Figure 1 and Figure 2As shown, the vertical traction assembly 400 includes a rack 410, a first gear 420, and a drive source 430. The rack 410 is disposed on the side of the slidable support column 330. The first gear 420 is rotatably disposed on the frame 100 and meshes with the rack 410. The drive source 430 is disposed on the frame and is poweredly connected to the first gear 420 to drive the first gear 420 to rotate circumferentially.

[0052] When the slidable support column 330 needs to move vertically upward, the drive source 430 is activated, outputting torque to the first gear 420, causing the first gear 420 to rotate counterclockwise. The first gear 420, through its meshing with the rack 410, drives the support column 330 to move vertically upward. The support column 330, through the wheel frame 320, drives the wheel body 310 to move upward until the wheel body 310 is flush with the upper surface of the container 600. Conversely, when the slidable support column 330 needs to move vertically downward, the drive source 430 is activated, outputting reverse torque to the first gear 420, causing the first gear 420 to rotate clockwise. The first gear 420, through its meshing with the rack 410, drives the support column 330 to move vertically downward. The support column 330, through the wheel frame 320, drives the wheel body 310 to move downward until the wheel body 310 contacts the ground.

[0053] In a further embodiment, such as Figure 2 , Figure 3 and Figure 5 As shown, the drive source 430 includes a linear actuator 431, a toothed belt 432, a second gear 433, and an elastic element 434. The second gear 433 is coaxially and fixedly connected to the first gear 420. The diameter of the second gear 433 is smaller than the diameter of the first gear 420. The linear actuator 431 is mounted on the frame 100. One end of the toothed belt 432 is fixedly connected to the movable end of the linear actuator 431, and the other end of the toothed belt 432 is connected to the elastic element 434. The second gear 433 meshes with the toothed belt 432. The end of the elastic element 434 away from the toothed belt 432 is mounted on the frame 100. The elastic element 434 is configured to extend along the axis of the movable end of the linear actuator 431.

[0054] When the slidable support column 330 needs to move vertically upward, the linear actuator 431 is activated, causing the movable end of the linear actuator 431 to retract. The movable end of the linear actuator 431 pulls the toothed belt 432, which drives the second gear 433 to rotate counterclockwise. The second gear 433 drives the first gear 420 to rotate synchronously. The counterclockwise rotation of the first gear 420 drives the rack 410 to move upward. The rack 410 drives the support column 330 to move synchronously. The support column 330 drives the wheel frame 320 and the wheel body 310 to move upward synchronously until the wheel body 310 is flush with the upper surface of the container 600.

[0055] When the slidable support column 330 needs to move downwards in the vertical direction, the linear actuator 431 is activated, causing the movable end of the linear actuator 431 to extend. The movable end of the linear actuator 431 pulls the toothed belt 432, which drives the second gear 433 to rotate clockwise. The second gear 433 drives the first gear 420 to rotate synchronously. The clockwise rotation of the first gear 420 drives the rack 410 to move downwards. The rack 410 drives the support column 330 to move synchronously. The support column 330 drives the wheel frame 320 and the wheel 310 to move downwards synchronously until the wheel 310 contacts the ground.

[0056] It is understandable that making the diameter of the first gear 420 larger than the diameter of the second gear 433 is to utilize the lever principle in order to reduce the amount of force required to drive the support column 330 to move.

[0057] Furthermore, the linear actuator 431 can be any actuator capable of outputting linear motion, such as a cylinder, a hydraulic cylinder, an electric telescopic rod, etc. Taking a hydraulic cylinder as an example, the hydraulic cylinder is connected to the hydraulic oil tank assembly and is used to deliver hydraulic oil into the hydraulic cylinder to drive the movable end of the hydraulic cylinder to extend or retract.

[0058] In a further embodiment, such as Figure 2 and Figure 5 As shown, the movable end of the linear execution unit 431 is also provided with a locking pin 435, and the support column 330 is provided with a locking hole 331.

[0059] When the movable end of the linear actuator 431 extends, the movable end of the linear actuator 431 drives the locking pin 435 to move synchronously. When the movable end of the linear actuator 431 moves to the ground where the wheel 310 corresponding to the slidable wheel assembly 300 touches the ground, the locking pin 435 and the locking hole 331 engage with each other. This is to ensure that the four wheel assemblies 300 are subjected to force evenly and to prevent the frame 100 from tipping over.

[0060] In a further embodiment, such as Figure 1As shown, the adaptive lightweight frame structure also includes a center of gravity adjustment component 500, which is mounted on the frame 100 and connected to the vertical traction component 400. It is used to adaptively reduce the center of gravity height of the frame structure after the vertical traction component 400 pulls the wheel assembly 300 up.

[0061] Understandably, when the wheel assembly 300 connected to the vertical traction component 400 is lifted, the overall center of gravity of the frame structure becomes too high, which can cause instability and make the frame structure prone to tipping over. To solve this problem, the center of gravity adjustment component 500 adaptively lowers the center of gravity of the frame structure so that when the wheel assembly 300 connected to the vertical traction component 400 is lifted, the overall center of gravity of the frame structure does not rise too much, thus making the frame structure more stable and less prone to tipping over.

[0062] In a further embodiment, such as Figure 1 , Figure 5 and Figure 6 As shown, the center of gravity adjustment assembly 500 includes a guide rail 510, a counterweight block 520, a guide wheel 530, a counterweight cable 540, and a roller 550. The roller 550 is coaxially and fixedly connected to the second gear 433. One end of the counterweight cable 540 is wound on the roller 550, and the other end of the counterweight cable 540 is connected to the counterweight block 520. The guide wheel 530 is rotatably mounted on the frame 100, and the counterweight cable 540 is connected to the guide wheel 530 through a transmission connection. The guide rail 510 is mounted on the frame 100 through a side guard added to one side of the frame 100, and the extension line of the guide rail 510 is set at an angle to the horizontal plane. The counterweight block 520 is slidably connected to the inside of the guide rail 510.

[0063] In the initial state, the counterweight 520 is located in the middle of the guide rail 510. When the movable end of the linear actuator 431 retracts, the linear actuator 431 pulls the toothed belt 432, which drives the second gear 433 to rotate clockwise. The second gear 433 drives the roller 550 to rotate clockwise synchronously. The counterweight cable 540 wound on the roller 550 gradually detaches from the winding. As a result, the counterweight 520 descends along the guide rail 510, so that the overall height of the frame structure does not rise too much, thus making the frame structure more stable and less prone to tipping over.

[0064] It is understandable that the height of containers 600 will vary depending on their standard. For example, the height of a 20-foot standard container is 2.39 meters, and the height of a 40-foot high cube container is 2.896 meters. The adjustment amount of the aforementioned center-of-gravity adjustment component 500 is positively correlated with the lifting height of the wheel assembly 300. Therefore, for containers 600 with a lower height, the movement of the counterweight 520 will be less, resulting in insignificant center-of-gravity adjustment of the counterweight 520. To address this issue, in a further embodiment, such as...Figure 6 As shown, the guide wheel 530 can also move horizontally, thereby causing the counterweight 520 to slide downward along the guide rail 510 under its own weight.

[0065] by Figure 6 As shown, when there are both high-profile and low-profile containers among the containers 600 in the same batch, the staff can adjust the position of the guide wheels 530 in advance according to the order in which the containers 600 are hoisted. For example, if the container 600 hoisted first is the lower-profile container 600, the guide wheels 530 will slide to the right a certain distance before being fixed to the frame 100. In this way, the counterweight cable 540 can make the counterweight block 520 move down a greater distance, so that the frame structure remains stable and is not easy to tip over.

[0066] In a further embodiment, the guide rail 510 is detachably mounted on the frame 100.

[0067] When the batch of containers 600 do not need to be densely placed, in order to make the frame structure lightweight, the staff can remove the guide rail 510 and the side guards that install the guide rail 510 from the frame 100, and detach the counterweight 520 from the counterweight cable 540. This makes the frame structure lighter and requires less power to drive.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A lightweight, adaptive frame structure, characterized in that, include: Frame; The hoisting assembly is attached to the frame. There are four wheel assemblies, which are located at the four corners of the frame. Three of the wheel assemblies are directly connected to the frame, and the other wheel assembly is connected to the frame by a vertical traction assembly, which is used to traction the wheel assembly connected to it to move in the vertical direction. The center of gravity adjustment component is located on the frame and connected to the vertical traction component. It is used to adaptively lower the center of gravity height of the frame structure after the vertical traction component pulls the wheel assembly up. The center of gravity adjustment assembly includes a guide rail, a counterweight, a guide wheel, a counterweight cable, and a roller. The roller is coaxially and fixedly connected to the second gear. One end of the counterweight cable is wound around the roller, and the other end of the counterweight cable is connected to the counterweight. The guide wheel is rotatably mounted on the frame, and the counterweight cable is drivenly connected to the guide wheel. The guide rail is mounted on the frame, and the extension line of the guide rail is set at an angle to the horizontal plane. The counterweight is slidably connected to the inside of the guide rail.

2. The adaptively adjustable lightweight frame structure according to claim 1, characterized in that, The wheel assembly includes a wheel body, a wheel frame, and a support column. The wheel body is rotatably mounted on the wheel frame, and the support column is vertically arranged. The lower end of the support column is rotatably connected to the wheel frame, and the upper end of the support column is connected to the frame. The support columns corresponding to three wheel assemblies are fixedly mounted on the frame, and the support column corresponding to another wheel assembly is slidably mounted on the frame.

3. The adaptively adjustable lightweight frame structure according to claim 2, characterized in that, The vertical traction assembly includes a rack, a first gear, and a drive source. The rack is mounted on the side of a slidable support column. The first gear is rotatably mounted on the frame and meshes with the rack. The drive source is mounted on the frame and is poweredly connected to the first gear to drive the first gear to rotate circumferentially.

4. The adaptively adjustable lightweight chassis structure according to claim 3, characterized in that, The drive source includes a linear actuator, a toothed belt, a second gear, and an elastic element. The second gear is coaxially and fixedly connected to the first gear, and the diameter of the second gear is larger than that of the first gear. The linear actuator is mounted on the frame. One end of the toothed belt is fixedly connected to the movable end of the linear actuator, and the other end of the toothed belt is connected to the elastic element. The second gear meshes with the toothed belt. The end of the elastic element away from the toothed belt is mounted on the frame. The elastic element is configured to extend along the axis of the movable end of the linear actuator.

5. The adaptively adjustable lightweight frame structure according to claim 4, characterized in that, The linear execution unit can be any type of execution unit capable of outputting linear motion.

6. The adaptively adjustable lightweight frame structure according to claim 4 or 5, characterized in that, The movable end of the linear execution unit is also provided with a locking pin, and the support column is provided with a locking hole; When the wheel corresponding to the sliding wheel assembly touches the ground, the locking pin and the locking hole engage with each other.

7. The adaptively adjustable lightweight frame structure according to claim 1, characterized in that, The guide wheel can also move horizontally, allowing the counterweight to slide downwards along the guide rail under its own weight.

8. The adaptively adjustable lightweight frame structure according to claim 1, characterized in that, The guide rail is detachably mounted on the frame.

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