A foldable and retractable auxiliary loading and unloading device for freight vehicles

Abstract

This utility model relates to the field of loading and unloading device technology, and discloses a foldable and telescopic auxiliary loading and unloading device for freight vehicles, comprising: a top plate with a groove at its top end; and a telescopic mechanism disposed inside the top plate. The telescopic mechanism includes a dual-axis motor, the outer surface of which is fixedly connected to the interior of the top plate, and a screw fixedly sleeved at the output end of the motor. This utility model, by setting up a telescopic mechanism composed of a dual-axis motor, a screw, a round rod, an arc-shaped block, guardrails, and a movable plate, can flexibly adjust the spacing of the guardrails on both sides according to the actual size of the goods, achieving stable clamping of goods of different sizes. This effectively prevents goods from slipping or tilting during loading, unloading, and transportation, ensuring the safety and stability of loading and unloading operations, while also improving adaptability to various types of goods and meeting diverse loading and unloading needs.

Description

Technical Field

[0001] This utility model relates to the field of loading and unloading device technology, and more specifically, to a foldable and retractable auxiliary loading and unloading device for freight vehicles. Background Technology

[0002] In today's booming logistics industry, efficient loading and unloading of goods plays a crucial role in improving overall operational efficiency and reducing costs. With the rapid rise of e-commerce and the increasing frequency of global trade, the volume of freight transportation has experienced explosive growth, posing unprecedented challenges to the logistics transportation process and placing higher demands on the performance of auxiliary loading and unloading devices for freight vehicles.

[0003] Traditional cargo loading and unloading methods rely heavily on manual labor, which is not only extremely inefficient and time-consuming, but also imposes high labor intensity on workers, leading to fatigue, cargo damage, and personal injury. While forklifts and other mechanical equipment improve efficiency to some extent, they suffer from high purchase costs and limited space, making them impractical for small logistics companies or loading / unloading points with limited space. To address this, various auxiliary loading and unloading devices for freight vehicles have emerged in the market. However, most existing auxiliary loading and unloading devices suffer from limited functionality, making it difficult to adapt to goods of varying sizes. They fail to provide stable and reliable loading support when loading and unloading goods of different specifications, leading to safety hazards such as cargo slippage and tilting, and potentially posing threats to vehicles and the surrounding environment. Some devices with fixing functions typically have simple fixing structures, only suitable for goods within a specific size range, and cannot achieve stable loading for goods exceeding that range. For example, some common loading and unloading platforms have fixed spacing between the fixed baffles on both sides, which cannot be flexibly adjusted according to the actual width of the goods. This requires operators to spend a lot of time and energy to find a suitable fixing method when loading and unloading goods, and may even require the use of additional auxiliary tools. This undoubtedly greatly reduces loading and unloading efficiency and increases labor intensity, so it needs to be improved. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a foldable and telescopic auxiliary loading and unloading device for freight vehicles, which has the advantage of being able to stably load goods of different sizes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a foldable and retractable auxiliary loading and unloading device for freight vehicles, comprising: A top plate, wherein a groove is provided at the top end of the top plate; A telescopic mechanism, wherein the telescopic mechanism is disposed inside the top plate; The telescopic mechanism includes a dual-axis motor. The outer surface of the dual-axis motor is fixedly connected to the interior of the top plate. Two screws are fixedly sleeved at the output end of the dual-axis motor. The threads on the two screws are in opposite directions. A round rod is threaded onto the outer surface of each of the two screws. The outer surface of the round rod is movably sleeved with the interior of the top plate. An arc-shaped block is fixedly installed at the end of the round rod away from the dual-axis motor. A guardrail is fixedly installed at the top of the arc-shaped block. A movable plate is fixedly installed at the bottom of the guardrail. The outer surface of the movable plate is slidably connected to the interior of the sliding groove.

[0006] As a preferred embodiment of this utility model, a lifting plate is attached to the bottom end of the top plate, a drive motor is fixedly installed on the outer surface of the lifting plate, a lead screw is fixedly sleeved at the output end of the drive motor, a slider is threadedly sleeved on the outer surface of the lead screw, the slider is slidably connected to the inside of the top end of the lifting plate, and the top end of the slider is fixedly connected to the bottom end of the top plate.

[0007] As a preferred embodiment of this utility model, a first hinge block is fixedly installed on the outer surface of the lifting plate, a first connecting rod is hinged inside the first hinge block, a long rod is movably sleeved at the end of the first connecting rod away from the first hinge block, a first guide plate is slidably connected to the outer surface of the long rod, and a base plate is fixedly installed at the bottom end of the first guide plate.

[0008] As a preferred embodiment of this utility model, a connecting shaft is movably sleeved inside the first connecting rod, and a second connecting rod is movably sleeved on the outer surface of the connecting shaft. A second hinge block is hinged to one end of the second connecting rod, and the second hinge block is fixedly connected to the base plate. A pressing shaft is fixedly sleeved at the end of the second connecting rod away from the second hinge block, and a second guide plate is slidably connected to the outer surface of the pressing shaft. The second guide plate is fixedly connected to the bottom end of the lifting plate.

[0009] As a preferred embodiment of this utility model, a fixing block is fixedly installed on the outer surface of the base plate, a cylinder is fixedly sleeved inside the fixing block, a connecting block is fixedly installed at the output end of the cylinder, and the interior of the connecting block is movably sleeved with the outer surface of the long rod.

[0010] As a preferred embodiment of this utility model, a handle is fixedly installed on the outer surface of the base plate, and a caster wheel is fixedly installed at the bottom end of the base plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up a telescopic mechanism composed of a dual-axis motor, screw, round rod, arc block, guardrail and movable plate, can flexibly adjust the spacing of the guardrails on both sides according to the actual size of the goods, realize the stable clamping of goods of different sizes, effectively prevent the goods from slipping or tilting during loading, unloading and transportation, ensure the safety and stability of loading and unloading operations, and improve the adaptability to various types of goods to meet diverse loading and unloading needs.

[0012] 2. This utility model achieves the overall rearward movement of the top plate through the cooperation of a drive motor, lead screw, and slider, and the lifting and lowering of the top plate is achieved using a scissor-like structure composed of a first link and a second link. This brings significant practical value: the lifting function of the top plate can flexibly adapt to truck trailers of different heights, ensuring a smooth loading and unloading transition surface between the device and the vehicle, avoiding collisions or jamming of goods during handling due to height differences; while the overall rearward movement design of the top plate allows it to extend directly above the truck trailer, significantly shortening the goods handling path, reducing physical exertion during manual handling, and lowering the risk of goods falling during transfer. The combination of these two aspects not only improves the adaptability of the device to different vehicle models and loading / unloading scenarios, but also significantly optimizes the smoothness and safety of loading and unloading operations, further enhancing the practical performance of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a cross-sectional view of the lifting plate of this utility model; Figure 4 This is a cross-sectional view of the dual-axis motor of this utility model; Figure 5 This is a schematic diagram of the structure of the cylinder of this utility model.

[0014] In the diagram: 1. Top plate; 2. Slide groove; 3. Dual-axis motor; 4. Screw; 5. Round rod; 6. Arc block; 7. Guardrail; 8. Movable plate; 9. Lifting plate; 10. Drive motor; 11. Lead screw; 12. Slider; 13. First hinge block; 14. First connecting rod; 15. Long rod; 16. First guide plate; 17. Connecting shaft; 18. Second connecting rod; 19. Second hinge block; 20. Extrusion shaft; 21. Second guide plate; 22. Fixing block; 23. Cylinder; 24. Connecting block; 25. Base plate; 26. Handle; 27. Caster wheel. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 5 As shown, this utility model provides a foldable and retractable auxiliary loading and unloading device for freight vehicles, comprising: Top plate 1, with a groove 2 at the top of top plate 1; The telescopic mechanism is located inside the top plate 1; The telescopic mechanism includes a dual-axis motor 3, the outer surface of which is fixedly connected to the interior of the top plate 1. A screw 4 is fixedly sleeved at the output end of the dual-axis motor 3. There are two screws 4, and the threads on the two screws 4 are in opposite directions. A round rod 5 is threadedly sleeved on the outer surface of each of the two screws 4. The outer surface of the round rod 5 is movably sleeved with the interior of the top plate 1. An arc-shaped block 6 is fixedly installed at the end of the round rod 5 away from the dual-axis motor 3. A guardrail 7 is fixedly installed at the top of the arc-shaped block 6. A movable plate 8 is fixedly installed at the bottom of the guardrail 7. The outer surface of the movable plate 8 is slidably connected to the interior of the slide groove 2.

[0017] The top plate 1 serves as the basic load-bearing structure for placing goods. The groove 2 at its top provides a sliding track for the movable plate 8, ensuring that the movable plate 8 can move stably. The telescopic mechanism is set inside the top plate 1. The dual-axis motor 3 provides power for the entire telescopic movement. The output end of the motor has two screws 4 with opposite thread directions. When rotated, the screws 5 that are threaded together with the motor can drive the round rod 5 to move in opposite directions. The round rod 5 is movably connected to the inside of the top plate 1 to ensure the stability of the movement. The arc-shaped block 6 at the end of the round rod 5 serves to connect the round rod 5 to the guardrail 7. The guardrail 7 is used to directly contact and clamp the goods. The movable plate 8 is fixed to the bottom of the guardrail 7 and slides in the groove 2, which further enhances the stability of the guardrail 7 during movement. Through the synergistic effect of these structures, the stable clamping of goods of different sizes is achieved.

[0018] The bottom end of the top plate 1 is attached to the lifting plate 9. The outer surface of the lifting plate 9 is fixedly installed with the drive motor 10. The output end of the drive motor 10 is fixedly sleeved with the lead screw 11. The outer surface of the lead screw 11 is threaded with the slider 12. The slider 12 is slidably connected to the inside of the top end of the lifting plate 9. The top end of the slider 12 is fixedly connected to the bottom end of the top plate 1.

[0019] The lifting plate 9 fits against the bottom of the top plate 1, providing a support base for the top plate 1. The drive motor 10 fixed on its outer surface can drive the lead screw 11 to rotate. The lead screw 11 is threadedly connected to the slider 12, and the slider 12 slides inside the top of the lifting plate 9. At the same time, the top of the slider 12 is fixed to the bottom of the top plate 1. In this way, when the lead screw 11 rotates, the slider 12 can drive the top plate 1 to move back and forth as a whole, thereby adjusting the relative position of the top plate 1 and the trailer of the freight vehicle, which facilitates the loading and unloading of goods.

[0020] The lifting plate 9 has a first hinge block 13 fixedly installed on its outer surface. The first hinge block 13 has a first connecting rod 14 hinged inside it. The end of the first connecting rod 14 away from the first hinge block 13 is movably sleeved with a long rod 15. The outer surface of the long rod 15 is slidably connected with a first guide plate 16. The bottom end of the first guide plate 16 is fixedly installed with a base plate 25.

[0021] The first hinge block 13 on the outer surface of the lifting plate 9 provides a hinge point for the first connecting rod 14, allowing the first connecting rod 14 to rotate around it. The end of the first connecting rod 14 away from the first hinge block 13 is movably connected to the long rod 15. The long rod 15 can slide within the first guide plate 16, which is fixed to the base plate 25. When the long rod 15 moves, it will drive the first connecting rod 14 to rotate around the first hinge block 13 as the axis, thereby cooperating with other structures to realize the lifting action of the lifting plate 9. The base plate 25 serves as the bottom support foundation of the entire device.

[0022] The first connecting rod 14 is internally movably sleeved with a connecting shaft 17, and the outer surface of the connecting shaft 17 is movably sleeved with a second connecting rod 18. One end of the second connecting rod 18 is hinged with a second hinge block 19, which is fixedly connected to the base plate 25. The end of the second connecting rod 18 away from the second hinge block 19 is fixedly sleeved with a pressing shaft 20, and the outer surface of the pressing shaft 20 is slidably connected with a second guide plate 21, which is fixedly connected to the bottom end of the lifting plate 9.

[0023] The connecting shaft 17 inside the first connecting rod 14 is used to connect the first connecting rod 14 and the second connecting rod 18 so that the two can move synchronously. One end of the second connecting rod 18 is hinged to the second hinge block 19, so that it can rotate around the second hinge block 19. At this time, the extrusion shaft 20 fixed at the other end of the second connecting rod 18 slides in the second guide plate 21. The second guide plate 21 is fixed to the bottom end of the lifting plate 9. Thus, when the second connecting rod 18 rotates under the drive of the first connecting rod 14, the extrusion shaft 20 slides along the second guide plate 21, and cooperates with the first connecting rod 14 to form a scissor structure, which together achieves the smooth lifting and lowering of the lifting plate 9.

[0024] Among them, a fixing block 22 is fixedly installed on the outer surface of the base plate 25, a cylinder 23 is fixedly sleeved inside the fixing block 22, a connecting block 24 is fixedly installed at the output end of the cylinder 23, and the interior of the connecting block 24 is movably sleeved with the outer surface of the long rod 15.

[0025] The fixing block 22 on the outer surface of the base plate 25 is used to fix the cylinder 23, so that the cylinder 23 can be installed stably. The output end of the cylinder 23 is fixed to the connecting block 24. The connecting block 24 is movably connected to the long rod 15. When the cylinder 23 works, its output end drives the long rod 15 to slide in the first guide plate 16 through the connecting block 24, providing power for the movement of the long rod 15, thereby driving the scissor structure to achieve lifting.

[0026] A handle 26 is fixedly installed on the outer surface of the base plate 25, and a caster wheel 27 is fixedly installed at the bottom end of the base plate 25.

[0027] The handle 26 on the outer surface of the base plate 25 provides a gripping area for the operator, making it easy to move the entire device. The casters 27 at the bottom of the base plate 25 reduce the friction when the device moves, allowing the operator to easily push the device to the designated position and improving the ease of movement of the device.

[0028] Working principle and usage process of this utility model: When the operator needs to load or unload goods on the freight vehicle, they first grasp handle 26 and push it. Since casters 27 are installed at the bottom of the base plate 25, the entire device will move under the rolling action of the casters 27. Once the device has moved to a suitable position next to the freight vehicle, the pushing stops. Then, the operator activates cylinder 23. The output end of cylinder 23 drives the connecting block 24 to move. Connecting block 24 is movably connected to long rod 15, so connecting block 24 pulls long rod 15 to slide backward along the inside of the first guide plate 16. Simultaneously, long rod 15 drives the first connecting rod 14, which is movably connected to it, to move. Since the first connecting rod 14 is hinged to the lifting plate 9 via the first hinge block 13, ... The first link 14 will start to rotate around the first hinge block 13. At the same time, the connecting shaft 17 inside the first link 14 will drive the second link 18 to move, so that the second link 18 rotates around the hinge point with the second hinge block 19. During the rotation of the second link 18, the pressing shaft 20 at its other end will slide backward along the inside of the second guide plate 21 and press and push the inside of the second guide plate 21. Through the coordinated movement of the scissor structure formed by the first link 14 and the second link 18, the lifting plate 9 will be lifted upward, thereby driving the top plate 1 at the top of the lifting plate 9 to rise synchronously until the top plate 1 rises to a position that matches the height of the cargo vehicle trailer. At this point, the operator closes the cylinder 23. The operator then activates the drive motor 10 on the outer surface of the lifting plate 9. The output of the drive motor 10 drives the lead screw 11 to rotate. Since the lead screw 11 has a slider 12 threadedly connected to its outer surface, and the slider 12 is slidably connected to the inside of the top of the lifting plate 9, while the top of the slider 12 is fixedly connected to the bottom of the top plate 1, the rotation of the lead screw 11 causes the slider 12 to slide backward along the inside of the top of the lifting plate 9. The slider 12 then drives the entire top plate 1 to move backward until the top plate 1 extends to a suitable position on the cargo vehicle trailer. At this point, the drive motor 10 is turned off. The operator can then place the goods on the top of the top plate 1. After the goods are placed, the dual-axis motor 3 inside the top plate 1 is activated. The output of the dual-axis motor 3 drives two screws 4 to rotate synchronously. Since the threads of the two screws 4 are opposite and both are threadedly connected to the round rod 5, and the round rod 5 is fixedly connected to the top of the lifting plate 9, the rotation of the lead screw 11 causes the slider 12 to slide backward along the inside of the top of the lifting plate 9. The slider 12 then drives the entire top plate 1 to move backward until the top plate 1 extends to a suitable position on the cargo vehicle trailer. At this point, the drive motor 10 is turned off. The operator can then place the goods on the top of the top plate 1. After the goods are placed, the operator starts the dual-axis motor 3 inside the top plate 1. The output of the dual-axis motor 3 drives two screws 4 to rotate synchronously. Since the threads of the two screws 4 are opposite and both are threadedly connected to the round rod 5, and the round rod 5 is threadedly connected to the top of the lifting plate 9, the operation of the dual-axis motor 11 is complete. The plate 1 is internally connected, so the rotation of the two screws 4 will cause the two round rods 5 to move in opposite directions along the inside of the top plate 1. The round rods 5 drive the arc-shaped blocks 6 at their ends to move, and the arc-shaped blocks 6 in turn drive the guardrails 7 at the top to move synchronously. The movable plate 8 at the bottom of the guardrails 7 will slide along the sliding groove 2 at the top of the top plate 1 until the outer surfaces of the two guardrails 7 are in close contact with the sides of the goods and firmly clamp the goods. Then the dual-axis motor 3 is turned off. When it is necessary to transfer the goods from the device to other positions, the operator first starts the drive motor 10 to make the top plate 1 move forward to get away from the trailer of the freight vehicle. Then the cylinder 23 is started to make the lifting plate 9 lower the top plate 1 to a suitable height. Finally, the handle 26 is pushed to move the device and goods to the target position through the casters 27. After reaching the target position, the operator starts the dual-axis motor 3 to make the two guardrails 7 move in opposite directions to release the goods.

[0029] 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.

[0030] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foldable and retractable auxiliary loading and unloading device for freight vehicles, characterized in that, Including: Top plate (1), the top of which is provided with a groove (2); Telescopic mechanism, wherein the telescopic mechanism is disposed inside the top plate (1); The telescopic mechanism includes a dual-axis motor (3), the outer surface of which is fixedly connected to the interior of the top plate (1), and a screw (4) is fixedly sleeved at the output end of the dual-axis motor (3). There are two screws (4), and the threads on the two screws (4) are opposite in direction. A round rod (5) is threadedly sleeved on the outer surface of each of the two screws (4). The outer surface of the round rod (5) is movably sleeved to the interior of the top plate (1). An arc-shaped block (6) is fixedly installed at the end of the round rod (5) away from the dual-axis motor (3). A guardrail (7) is fixedly installed at the top of the arc-shaped block (6). A movable plate (8) is fixedly installed at the bottom of the guardrail (7). The outer surface of the movable plate (8) is slidably connected to the interior of the slide groove (2).

2. The foldable and retractable auxiliary loading and unloading device for freight vehicles according to claim 1, characterized in that: The bottom end of the top plate (1) is attached to a lifting plate (9). A drive motor (10) is fixedly installed on the outer surface of the lifting plate (9). A lead screw (11) is fixedly sleeved at the output end of the drive motor (10). A slider (12) is threadedly sleeved on the outer surface of the lead screw (11). The slider (12) is slidably connected to the inside of the top end of the lifting plate (9). The top end of the slider (12) is fixedly connected to the bottom end of the top plate (1).

3. The foldable and retractable auxiliary loading and unloading device for freight vehicles according to claim 2, characterized in that: The outer surface of the lifting plate (9) is fixedly installed with a first hinge block (13), and the first hinge block (13) is hinged with a first connecting rod (14). The end of the first connecting rod (14) away from the first hinge block (13) is movably sleeved with a long rod (15). The outer surface of the long rod (15) is slidably connected with a first guide plate (16), and the bottom end of the first guide plate (16) is fixedly installed with a base plate (25).

4. The foldable and retractable auxiliary loading and unloading device for freight vehicles according to claim 3, characterized in that: The first connecting rod (14) is movably sleeved with a connecting shaft (17), and the outer surface of the connecting shaft (17) is movably sleeved with a second connecting rod (18). One end of the second connecting rod (18) is hinged with a second hinge block (19), and the second hinge block (19) is fixedly connected to the base plate (25). The end of the second connecting rod (18) away from the second hinge block (19) is fixedly sleeved with a pressing shaft (20), and the outer surface of the pressing shaft (20) is slidably connected with a second guide plate (21). The second guide plate (21) is fixedly connected to the bottom end of the lifting plate (9).

5. A foldable and retractable auxiliary loading and unloading device for freight vehicles according to claim 3, characterized in that: A fixing block (22) is fixedly installed on the outer surface of the base plate (25). A cylinder (23) is fixedly sleeved inside the fixing block (22). A connecting block (24) is fixedly installed at the output end of the cylinder (23). The interior of the connecting block (24) is movably sleeved with the outer surface of the long rod (15).

6. A foldable and retractable auxiliary loading and unloading device for freight vehicles according to claim 3, characterized in that: A handle (26) is fixedly installed on the outer surface of the base plate (25), and a caster wheel (27) is fixedly installed at the bottom end of the base plate (25).

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