Road freight auxiliary loading and unloading device

Abstract

This invention provides a road freight auxiliary loading and unloading device, belonging to the technical field of loading and unloading devices. The device includes a base plate and an auxiliary support mechanism. Three support plates are evenly spaced and fixedly arranged around the outer edge of the upper surface of the base plate. Side plates are fixedly arranged on the lower inner sides of the three support plates. Half gears are rotatably arranged on the upper surfaces of the three support plates, and lifting components are fixedly arranged on the upper ends of each of the three half gears. Each lifting component includes a first connecting plate and a second connecting plate, which are hinged together. The auxiliary support mechanism includes a lower plate, and multiple springs are fixedly arranged on the upper surface of the lower plate. By integrating multiple functions such as height adjustment, area expansion, buffer protection, and tilt unloading, the device achieves mechanization and semi-automation of loading and unloading operations. It not only significantly improves the efficiency of freight loading and unloading but also has a stable structure and safety.

Description

Technical Field

[0001] This invention relates to the field of loading and unloading equipment technology, specifically to an auxiliary loading and unloading device for road freight transportation. Background Technology

[0002] Road freight transport refers to production activities that use trucks as the main means of transport to move goods in space via roads. There are many types of trucks, each with different performance and applicable scope. They can not only undertake some freight tasks that other modes of transport cannot or cannot do well, but also realize door-to-door transport. Loading and unloading are inevitable during the freight transport process.

[0003] In traditional logistics loading and unloading, goods need to be lifted and loaded / unloaded. However, goods are generally large in volume and heavy in weight, so a lot of manpower is often required for handling and lifting. The traditional method is to use trolleys to move goods, but trolleys cannot overcome the height difference between the lifting surface and the ground, so that other devices are needed to lift the goods, which is very inconvenient. When existing belt conveyors, trolleys, cranes and other general machinery and ordinary loading and unloading machines are used, the large drop of goods can easily cause damage. Moreover, existing loading and unloading equipment is large in size and occupies a lot of space, making it inconvenient to use. Summary of the Invention

[0004] To solve the above problems, the present invention is implemented through the following technical solution: a road freight auxiliary loading and unloading device, including a base plate and an auxiliary support mechanism. Three support plates are fixedly arranged at equal intervals around the outer edge of the upper surface of the base plate. Side plates are fixedly arranged at the lower end of the inner side of the three support plates. Half gears are rotatably arranged on the upper surface of the three support plates. Lifting components are fixedly arranged on the upper end of each of the three half gears. The lifting components include a first connecting plate and a second connecting plate, which are hinged together. The auxiliary support mechanism includes a lower plate. Multiple springs are fixedly arranged on the upper surface of the lower plate. An upper plate is fixedly arranged on the upper end of the multiple springs. Three fixed seats are fixedly arranged at equal intervals around the inner side of the lower plate. The inner sides of the three fixed seats are rotatably connected to the second connecting plate through connecting columns. The upper surfaces of the three side plates are rotatably equipped with rotating plates, and the upper surfaces of the rotating plates are fixedly equipped with adjusting rings. The upper surfaces of the upper plate are provided with sliding grooves on both sides, and adjusting screws are rotatably installed inside the sliding grooves. The outer wall of the adjusting screws is threaded with movable blocks. The upper ends of the two movable blocks are respectively fixedly equipped with a first cargo plate and a second cargo plate. One of the three support plates is fixedly equipped with a hydraulic rod on its outer wall, and the output end of the hydraulic rod is located below the upper plate.

[0005] Preferably, one end of the second cargo plate is provided with multiple slots, and the end of the first cargo plate near the second cargo plate is fixedly provided with multiple plug rods that are inserted into the slots.

[0006] Preferably, a dual-head motor is fixedly installed at the midpoint inside the upper plate, and the two adjusting screws are respectively fixedly installed at the two output ends of the dual-head motor.

[0007] Preferably, the upper plate and the lower plate are hinged together on one side of their outer walls via a hinge connector.

[0008] Preferably, the adjusting ring adopts a spiral structure design, and the adjusting ring is meshed with a half gear.

[0009] Preferably, the lower surface of the end of the second cargo plate away from the first cargo plate is designed with an inclined cross-section structure.

[0010] Preferably, a circular ring plate is fixedly provided at the outer edge of the lower end of the rotating plate, and the circular ring plate is rotatably engaged in a slot opened on the upper surface of the side plate. A drive motor is fixedly provided at the center of the upper surface of the bottom plate, wherein the output end of the drive motor is fixedly connected to the lower end of the rotating plate.

[0011] Preferably, bottom wheels are fixedly installed at the front and rear ends of both sides of the lower end face of the base plate, wherein the four bottom wheels are divided into two fixed wheels and two self-locking universal wheels.

[0012] Beneficial effects This invention provides an auxiliary loading and unloading device for road freight transportation. It has the following beneficial effects: This invention provides a road freight auxiliary loading and unloading device. The device integrates multiple functions, including flexible height adjustment of the loading and unloading platform, convenient expansion of the load-bearing area, and one-button tilting unloading. Through a transmission mechanism involving a spiral adjusting ring and a half-gear, the platform can be smoothly and precisely adjusted to be flush with the floor of different truck cargo boxes. A dual-head motor-driven screw can simultaneously expand the working area of ​​two cargo plates to accommodate large-volume goods, and the plug-in structure enhances overall stability when the plates are closed. The unique hydraulic lifting and hinged plate design allows the entire platform to form a controllable tilting ramp, enabling gravity-assisted sliding unloading of goods, greatly reducing labor intensity and the risk of goods falling. Simultaneously, the device's built-in spring array provides effective cushioning, enhancing load-bearing stability. It is not only simple to operate, safe, and efficient, but also comprehensively solves the pain points of traditional loading and unloading methods, such as large height differences, high labor intensity, low efficiency, and insufficient safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention from an isometric perspective; Figure 2 For the present invention Figure 1 Another state structure is shown in the axonometric diagram; Figure 3 For the present invention Figure 1 A side view of the axonometric structure; Figure 4 For the present invention Figure 1 A partial top-view axonometric schematic diagram; Figure 5 For the present invention Figure 1 A schematic diagram of the other side of the visual axis; Figure 6 For the present invention Figure 4 Another top-view axonometric schematic diagram; Figure 7 For the present invention Figure 6 A top-section axial view of the structure; Figure 8 This is a partial structural diagram of the present invention.

[0014] The components are as follows: 1. No. 1 cargo pallet; 2. No. 2 cargo pallet; 3. Auxiliary support mechanism; 301. Spring; 302. Upper plate; 303. Lower plate; 4. Support plate; 5. Adjusting ring; 6. Base plate; 7. Bottom wheel; 8. Rotating plate; 9. Lifting assembly; 901. No. 1 connecting plate; 902. No. 2 connecting plate; 10. Half gear; 11. Hydraulic rod; 12. Adjusting screw; 13. Movable block; 14. Hinge; 15. Side plate; 16. Fixed seat. Detailed Implementation

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

[0016] Example: like Figures 1-8 As shown, this embodiment of the invention provides a road freight auxiliary loading and unloading device, including a base plate 6 and an auxiliary support mechanism 3. Three support plates 4 are fixedly arranged at equal intervals around the outer edge of the upper surface of the base plate 6. Side plates 15 are fixedly arranged at the lower end of the inner side of the three support plates 4. Half gears 10 are rotatably arranged on the upper end of the three support plates 4. Lifting components 9 are fixedly arranged on the upper end of each of the three half gears 10. The lifting components 9 include a first connecting plate 901 and a second connecting plate 902, which are hinged together. The auxiliary support mechanism 3 includes a lower plate 303. Multiple springs 301 are fixedly arranged on the upper surface of the lower plate 303. An upper plate 302 is fixedly arranged on the upper end of the multiple springs 301. Three fixed seats 16 are fixedly arranged at equal intervals around the inner side of the lower plate 303. The inner side of each of the three fixed seats 16 is rotatably connected to the second connecting plate 902 through a connecting column. Rotating plates 8 are rotatably mounted on the upper surfaces of the three side plates 15. Adjusting rings 5 ​​are fixedly mounted on the upper surfaces of the rotating plates 8. Slide grooves are provided on both sides of the upper surface of the upper plate 302, and adjusting screws 12 are rotatably mounted inside the slide grooves. Movable blocks 13 are threaded onto the outer walls of the adjusting screws 12. Two movable blocks 13 are respectively fixedly mounted on the upper ends of the first cargo plate 1 and the second cargo plate 2. A hydraulic rod 11 is fixedly mounted on the outer wall of one of the three support plates 4, and the output end of the hydraulic rod 11 is located below the upper plate 302. Specifically, in the above-described embodiment, the device constitutes a stable and adjustable loading and unloading platform. Three support plates 4 and side plates 15 form a robust support frame on the base plate 6. By driving the rotating plate 8 to rotate, the adjusting ring 5 on it rotates. The adjusting ring 5, through meshing with the half-gear 10, converts the continuous rotational motion into the intermittent reciprocating rotation of the half-gear 10, thereby driving the connected lifting assembly 9 to extend or retract. The top of the lifting assembly 9 is connected to the lower plate 303 of the auxiliary support mechanism 3 via a fixed seat 16, thereby achieving height adjustment of the entire cargo platform to accommodate truck cargo boxes of different heights. The array of springs 301 in the auxiliary support mechanism 3 provides cushioning during loading and unloading, reducing the impact of goods on the device and improving stability. The adjustable cargo plate design on the upper plate 302 is used to accommodate goods of different sizes.

[0017] In one embodiment of the present invention, a plurality of slots are provided at one end of the second cargo plate 2, and a plurality of plug rods that are inserted into the slots are fixedly provided at one end of the first cargo plate 1 near the second cargo plate 2. Specifically, in the above-described embodiment, when pallet 1 and pallet 2 are driven together by adjusting screw 12, the insert on pallet 1 will precisely insert into the corresponding slot on pallet 2. This plug-in structure effectively strengthens the structural strength of the connection between the two pallets, preventing deflection or misalignment at the connection when bearing heavy loads, ensuring the flatness and stability of the entire loading and unloading platform. Furthermore, this connection method is simple, reliable, and facilitates repeated docking and disassembly.

[0018] In one embodiment of the present invention, a dual-head motor is fixedly installed at the midpoint inside the upper plate 302, and two adjusting screws 12 are respectively fixedly installed at the two output ends of the dual-head motor. Specifically, in the above embodiment, a dual-head motor serves as the power source, with its two output shafts driving the adjusting screws 12 on the left and right sides to rotate synchronously in opposite directions. Since the movable block 13 and the adjusting screw 12 are threadedly connected and confined within the groove to only linear motion, when the screws rotate, the two movable blocks 13 carry their respective first and second cargo plates 1 and 2, moving towards or away from each other, thereby expanding and contracting the working area of ​​the cargo platform. This design is compact, with concentrated power, ensuring synchronous, smooth, and symmetrical movement of the two cargo plates.

[0019] In one embodiment of the present invention, the adjusting ring 5 adopts a spiral structure design and is meshed with the half gear 10. Specifically, in the above-described embodiment, the spiral structure refers to the adjusting ring 5 having a contour resembling a "cam" or "end-face thread" with continuous undulating surfaces, and it does not mesh with the teeth of the half-gear 10 throughout its entire length. When the rotating plate 8 drives the adjusting ring 5 to rotate at a constant speed, the radially protruding part of the adjusting ring 5 will contact the teeth of the half-gear 10 and push it to rotate at a certain angle, while the radially concave part of the adjusting ring 5 will disengage from the half-gear 10. At this time, the half-gear 10 remains stationary under its own weight or external load. This mechanism, which converts continuous rotation into intermittent angular displacement, can precisely and controllably drive the lifting assembly 9 to lift and lower level by level, avoiding platform instability caused by excessive transmission speed.

[0020] In one embodiment of the present invention, the upper plate 302 and the lower plate 303 are hinged together on one side of their outer walls by a hinge member 14. Specifically, in the above-described embodiment, the upper plate 302 and the lower plate 303 are connected by a hinge 14 on one side, forming a single unit that can rotate relative to each other around the hinge axis. When the hydraulic rod 11 located on the outer wall of the support plate 4 extends and its output end pushes against the lower surface of the upper plate 302, due to the presence of the hinge 14, the entire auxiliary support mechanism 3, together with the first cargo plate 1 and the second cargo plate 2 on it, will act as a rigid platform, tilting smoothly towards the side where the hydraulic rod 11 is located, with the hinge axis as the fulcrum. This design is key to realizing the function of tilting and sliding unloading of goods, and its tilt angle can be adjusted by controlling the extension length of the hydraulic rod 11.

[0021] In one embodiment of the present invention, the lower surface of the end of the second cargo plate 2 away from the first cargo plate 1 is designed as an inclined cross-section structure; Specifically, in the above-described embodiment, the inclined cross-sectional structure of the lower outer surface of the second cargo pallet 2 forms a guide ramp. When the device approaches the rear of the truck bed or the loading / unloading platform, this ramp can act as a transition bridge, significantly reducing the height difference or gap between the end of the cargo pallet and the target plane. This allows trolleys, forklift forks, or the cargo itself to move onto the cargo pallet more smoothly and with less impact, or slide from the cargo pallet to the target plane, improving the smoothness and safety of loading and unloading operations.

[0022] In one embodiment of the present invention, a circular ring plate is fixedly provided at the outer edge of the lower end of the rotating plate 8 and the circular ring plate is rotatably engaged in the slot opened on the upper end face of the side plate 15. A drive motor is fixedly provided at the center of the upper end face of the bottom plate 6, wherein the output end of the drive motor is fixedly connected to the lower end of the rotating plate 8. Specifically, in the above-described embodiment, the rotating plate 8 achieves precise axial positioning and radial support by engaging with the annular groove on the side plate 15 through the lower ring plate, ensuring that it can only rotate smoothly around the central axis without swaying. A drive motor, such as a low-speed geared motor, fixed to the center of the base plate 6 directly drives the rotating plate 8 to rotate, resulting in a short power transmission path and high efficiency. This center-driven, edge-supported structure ensures the concentricity and stability of the rotating plate 8 and the upper adjusting ring 5, thereby enabling synchronous and balanced driving of the three half-gears 10.

[0023] In one embodiment of the present invention, bottom wheels 7 are fixedly provided at the front and rear ends of both sides of the lower end face of the base plate 6, wherein the four bottom wheels 7 are divided into two fixed wheels and two self-locking universal wheels; Specifically, in the above-described embodiments, the four bottom wheels 7 are typically arranged with two fixed wheels on the same straight axis and two self-locking swivel wheels on another axis. This arrangement provides the device with both good straight-line pushing stability and flexible steering capability. The self-locking swivel wheels can be locked after the device is positioned to prevent accidental movement during operation and ensure safe loading and unloading. The fixed wheels provide a reliable load-bearing and guiding foundation. This wheel configuration balances ease of movement with stability during operation.

[0024] Working Principle: When using this loading and unloading device, first push it to the designated position at the rear of the truck or the loading / unloading point, and lock the self-locking casters for fixation. Start the drive motor in the center of the base plate 6, which drives the rotating plate 8 and the spiral adjusting ring 5 above it to rotate. The adjusting ring 5 sequentially actuates the three equally spaced half gears 10 to rotate intermittently. The rotation of each half gear 10 drives the lifting assembly 9 fixed to it to extend by the scissor mechanism formed by the hinge of the first connecting plate 901 and the second connecting plate 902. The three lifting assemblies 9 extend synchronously, jointly lifting the auxiliary support mechanism 3. The spring 301 in the mechanism provides cushioning. By controlling the number of rotations of the drive motor, the height of the upper plate 302 and its loading platform can be precisely adjusted to make it flush with the truck's cargo box floor.

[0025] After the height adjustment is complete, the dual-head motor inside the upper plate 302 can be activated to drive the two adjusting screws 12 to rotate synchronously in opposite directions, causing the first cargo plate 1 and the second cargo plate 2 to move in opposite directions, expanding the loading area to accommodate large-volume goods. When the two are placed together, the insert rod and slot are engaged to enhance the overall integrity. When loading goods, the inclined cut surface at the front end of the second cargo plate 2 can be used as a guide.

[0026] During unloading, after the platform height is adjusted to the correct position, the hydraulic rod 11 located on one side support plate 4 is activated. The hydraulic rod 11 extends and pushes the bottom of the upper plate 302. Since the upper and lower plates are connected by the hinge 14, the entire cargo platform will tilt smoothly towards the hydraulic rod 11 with the hinge axis as the fulcrum, forming a sliding unloading slope. Subsequently, the goods can be gently pushed manually or with the help of tools to smoothly slide into the cargo compartment or unload onto the ground along the inclined cargo platform, completing the labor-saving unloading operation. After the operation is completed, the mechanisms are reversed to restore the device to its initial state for easy movement and storage.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A road freight auxiliary loading and unloading device, comprising a base plate (6) and an auxiliary support mechanism (3), characterized in that: Three support plates (4) are fixedly arranged at equal intervals around the outer edge of the upper surface of the base plate (6). Side plates (15) are fixedly arranged at the lower end of the inner side of the three support plates (4). Half gears (10) are rotatably arranged on the upper end of the three support plates (4). Lifting components (9) are fixedly arranged on the upper end of the three half gears (10). The lifting components (9) include a first connecting plate (901) and a second connecting plate (902). The first connecting plate (901) and the second connecting plate (902) are hinged together. The auxiliary support mechanism (3) includes a lower plate (303). Multiple springs (301) are fixedly arranged on the upper surface of the lower plate (303). An upper plate (302) is fixedly arranged on the upper end of the multiple springs (301). Three fixed seats (16) are fixedly arranged at equal intervals around the inner side of the lower plate (303). The inner side of the three fixed seats (16) is rotatably connected to the second connecting plate (902) through a connecting column. Rotating plates (8) are rotatably mounted on the upper surfaces of the three side plates (15). Adjusting rings (5) are fixedly mounted on the upper surfaces of the rotating plates (8). Slide grooves are provided on both sides of the upper surface of the upper plate (302), and adjusting screws (12) are rotatably mounted inside the slide grooves. Movable blocks (13) are threaded onto the outer wall of the adjusting screws (12). First cargo plate (1) and second cargo plate (2) are fixedly mounted on the upper ends of the two movable blocks (13), respectively. A hydraulic rod (11) is fixedly mounted on the outer wall of one of the three support plates (4), and the output end of the hydraulic rod (11) is located below the upper plate (302).

2. The road freight auxiliary loading and unloading device according to claim 1, characterized in that: The second cargo plate (2) has multiple slots at one end, and the first cargo plate (1) has multiple plug rods that are inserted into the slots at one end near the second cargo plate (2).

3. The road freight auxiliary loading and unloading device according to claim 1, characterized in that: A dual-head motor is fixedly installed at the midpoint inside the upper plate (302), and the two adjusting screws (12) are respectively fixedly installed at the output ends of the dual-head motor.

4. The road freight auxiliary loading and unloading device according to claim 1, characterized in that: The upper plate (302) and the lower plate (303) are hinged together on one side of their outer walls by a hinge (14).

5. The road freight auxiliary loading and unloading device according to claim 1, characterized in that: The adjusting ring (5) adopts a spiral structure design and is meshed with the half gear (10).

6. The road freight auxiliary loading and unloading device according to claim 1, characterized in that: The lower surface of the end of the second cargo plate (2) away from the first cargo plate (1) is designed with an inclined cut structure.

7. A road freight auxiliary loading and unloading device according to claim 1, characterized in that: A circular ring plate is fixedly installed at the outer edge of the lower end of the rotating plate (8), and the circular ring plate is rotated and locked in the slot opened on the upper end face of the side plate (15). A drive motor is fixedly installed at the center of the upper end face of the bottom plate (6), wherein the output end of the drive motor is fixedly connected to the lower end of the rotating plate (8).

8. A road freight auxiliary loading and unloading device according to claim 1, characterized in that: Bottom wheels (7) are fixedly installed on both sides of the lower end face of the base plate (6), and the four bottom wheels (7) are divided into two fixed wheels and two self-locking universal wheels.

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