A foldable and storable light-weight mobile drive-on bridge

Abstract

The utility model relates to the technology field of the boarding bridge, especially to a light -duty movable boarding bridge of foldable storage, the utility model provides such a light -duty movable boarding bridge of foldable storage, including mobile frame, support frame, boarding plate, support foot, turnover bridge board, bottom bridge board, turnover block, connecting shaft, turnover hinge, folding subassembly and transmission assembly, and mobile frame adopts the inclined top surface structure design of left high right low, and mobile frame top fixed mounting has support frame. Through the folding subassembly and transmission assembly of unique design, utilize planetary gear drive and belt pulley drive mechanism, realize the synchronous folding of turnover bridge board and bottom bridge board. Turnover bridge board turns 90 degrees while turning 90 degrees, and bottom bridge board turns over 180 degrees, and after folding, the two are closely attached to the boarding plate, greatly reducing the device floor space, effectively solving the problem that the traditional boarding bridge occupies large space, inconvenient transportation and storage, facilitating the carrying and storage of equipment, improving space utilization.

Description

Technical Field

[0001] This utility model relates to the field of loading ramp technology, and in particular to a foldable and portable lightweight mobile loading ramp. Background Technology

[0002] In modern logistics transportation and warehousing operations, loading ramps are widely used in various logistics centers, warehouses, and factories as key equipment for achieving rapid and efficient connection between vehicles and loading / unloading platforms. While traditional fixed loading ramps offer advantages such as high load-bearing capacity and good stability, their immobility and large space requirements make them unsuitable for meeting the needs of different work locations and diverse operational scenarios. Existing mobile loading ramps, although offering some mobility, still occupy significant storage and transportation space when not in use, especially in scenarios requiring frequent changes of work sites or high space utilization efficiency, where the space occupation problem of traditional mobile loading ramps becomes increasingly prominent.

[0003] To address the aforementioned issues, some foldable loading ramp designs have emerged in the existing technology. However, most of these designs suffer from drawbacks such as complex folding structures, cumbersome operation, and low reliability. For example, some loading ramps use a single linkage drive for their folding mechanism, which is prone to problems such as unstable transmission and severe wear of components during the folding process, making it difficult to complete the folding action smoothly.

[0004] Therefore, there is an urgent need to develop a foldable loading ramp that is simple in structure, easy to operate, has a good folding effect, and occupies little space, in order to meet the needs of the modern logistics industry for efficient and flexible operating equipment, improve the utilization rate of warehousing and transportation space, and reduce the cost of equipment use and maintenance. Utility Model Content

[0005] In order to overcome the shortcomings mentioned in the background art, the technical problem of this utility model is to provide a foldable and portable lightweight mobile loading bridge.

[0006] Technical Solution: A foldable and lightweight mobile loading ramp includes a mobile frame, a support frame, a loading platform, support feet, a flip-up bridge plate, a bottom bridge plate, flip blocks, connecting shafts, flip hinges, a folding assembly, and a transmission assembly. The mobile frame adopts a left-high-right-low inclined top surface structure design. A support frame is fixedly installed on the top of the mobile frame, and a loading platform is installed on the support frame. A support foot is placed on the left side of the mobile frame, and the top surface of the support foot also has a left-high-right-low inclined structure and is on the same inclined line as the top surface of the mobile frame. A flip-up bridge plate is connected to the top of the support foot. The right end of the flip-up bridge plate contacts and aligns with the left end of the loading platform. The bottom bridge plate is rotatably installed on the right end of the loading platform through two front and rear flip hinges. The inclination angle of the bottom bridge plate is strictly consistent with that of the loading platform. A connecting shaft is symmetrically rotatably connected to the left side of the support frame, and a flip block is connected to the outside of the connecting shaft. A rotating shaft is connected to the front and rear ends of the right side of the flip-up bridge plate, and the flip blocks are rotatably connected to the rotating shafts on the flip-up bridge plate. The support frame is equipped with a folding assembly and a transmission assembly.

[0007] In a preferred embodiment of this utility model, a plurality of universal wheels with bidirectional braking function are installed at equal intervals at the bottom of the mobile frame, and the universal wheels are equipped with high-strength polyurethane rubber wheel surfaces.

[0008] In a preferred embodiment of this utility model, the main structure of the mobile frame is integrally molded from high-strength aluminum alloy material, and the yield strength of the aluminum alloy material is not less than 200MPa.

[0009] In a preferred embodiment of this utility model, the boarding board, the bottom bridge board and the tilting bridge board are all made of patterned steel plate with a thickness of 8-12mm. The pattern shape on the surface of the patterned steel plate is rhomboid or lentil-shaped, and the pattern spacing is evenly distributed.

[0010] In a preferred embodiment of this utility model, the folding assembly includes a main shaft, a driving gear, a driven gear, a fixed gear, and a planetary gear. The main shaft is rotatably connected to the left side of the support frame. The driving gear is connected to both the front and rear ends of the main shaft. The driven gear is connected to the outer end of the connecting shaft. The driven gear meshes with the corresponding driving gear. Fixed gears are fixedly connected to the support frame at positions aligned with the driven gears. The inner end of the rotating shaft on the flip bridge plate is connected to the planetary gear. The planetary gear meshes with the corresponding fixed gear.

[0011] In a preferred embodiment of the present invention, the transmission assembly includes a conveyor belt, a transmission shaft, and a synchronization assembly. The transmission shaft is rotatably connected to the right side of the support frame. The transmission shaft is connected to both the front end and the rear end of the main shaft by a conveyor belt. The front and rear ends of the transmission shaft are connected to the corresponding flip hinge drive shaft by a synchronization assembly.

[0012] Compared with existing technologies, this utility model has the following advantages: Through a uniquely designed folding and transmission assembly, and utilizing planetary gear transmission and pulley transmission mechanisms, the synchronous folding of the flip bridge plate and the bottom bridge plate is achieved. The flip bridge plate rotates 90 degrees around its center and 90 degrees on its own axis, while the bottom bridge plate flips 180 degrees. After folding, both plates fit snugly against the loading platform, significantly reducing the space occupied by the device. This effectively solves the problems of large space occupation and inconvenient transportation and storage of traditional loading ramps, facilitating equipment handling and storage, and improving space utilization. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the planar structure of this utility model.

[0015] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0016] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.

[0017] The above-mentioned drawings include the following reference numerals: 1. moving frame, 2. support frame, 3. boarding plate, 4. support foot, 5. tilting bridge plate, 6. bottom bridge plate, 7. main shaft, 8. driving gear, 9. tilting block, 10. driven gear, 11. fixed gear, 12. planetary gear, 13. connecting shaft, 14. conveyor belt, 15. drive shaft, 16. tilting hinge, 17. synchronization component. Detailed Implementation

[0018] Example: A foldable and retractable lightweight mobile loading ramp, such as... Figures 1-4As shown, the system includes a mobile frame 1, a support frame 2, a loading platform 3, support feet 4, a tilting bridge 5, a bottom bridge 6, a tilting block 9, a connecting shaft 13, a tilting hinge 16, a folding assembly, and a transmission assembly. The main structure of the mobile frame 1 is made of high-strength aluminum alloy in one piece. The yield strength of the aluminum alloy is not less than 200MPa, and it has the characteristics of being lightweight, high-strength, and corrosion-resistant. While ensuring the load-bearing capacity of the mobile frame 1, it effectively reduces the overall weight of the equipment, making it easy to move and operate. Furthermore, the mobile frame 1 adopts a tilted top surface structure design with the left side higher than the right side. The top of the mobile frame 1 is open to... A support frame 2 is fixedly installed with high-strength bolts. A loading platform 3 is installed on the support frame 2. A support foot 4 is placed on the left side of the movable frame 1. The top surface of the support foot 4 is also inclined with the left side higher than the right side, and it is on the same inclined straight line as the top surface of the movable frame 1 to ensure the consistency of the slope when the vehicle is climbing the bridge and reduce sudden changes in the stress on the vehicle chassis. A flip bridge plate 5 is connected to the top of the support foot 4. The right end of the flip bridge plate 5 contacts and aligns with the left end of the loading platform 3 to ensure the continuity of the vehicle's driving path. The bottom bridge plate 6 is rotatably installed on the right end of the loading platform 3 through two front and rear flip hinges 16. The tilt angle of the bottom bridge plate 6 is strictly consistent with that of the loading platform 3, allowing the bottom bridge plate 6 to directly and smoothly connect with the ground. In its initial unfolded state, it forms a continuous inclined channel from the ground to a higher position, allowing vehicles to smoothly drive into the elevated work area from the bottom bridge plate 6. The support frame 2 has connecting shafts 13 symmetrically rotatably connected to the left front and rear, with flipping blocks 9 connected to the outer sides of each connecting shaft 13. The right front and rear ends of the flipping bridge plate 5 are respectively connected to rotating shafts, and the flipping blocks 9 are rotatably connected to the rotating shafts on the flipping bridge plate 5. The support frame 2 is equipped with a folding assembly and a transmission assembly, which work together to realize the folding and unfolding of the loading bridge. The mobile frame 1 has multiple omnidirectional braking wheels installed at equal intervals at its bottom. These wheels are equipped with high-strength polyurethane rubber surfaces, which have good wear resistance, shock absorption, and noise reduction, and can move and position freely on various ground surfaces. The loading platform 3, bottom bridge plate 6, and tilting bridge plate 5 are all made of patterned steel plates with a thickness of 8-12mm. The pattern on the surface of the steel plate is diamond-shaped or lentil-shaped, and the pattern spacing is evenly distributed. This design increases the friction on the bridge plate surface, effectively preventing vehicles from slipping during driving and ensuring driving safety.

[0019] like Figures 1-3As shown, the folding assembly includes a main shaft 7, a driving gear 8, a driven gear 10, a fixed gear 11, and a planetary gear 12. The main shaft 7 is rotatably connected to the left side of the support frame 2 via bearings for connecting an external servo motor. The driving gear 8 is welded to both the front and rear ends of the main shaft 7. The driven gear 10 is welded to the outer end of the connecting shaft 13. The driven gear 10 meshes with the corresponding driving gear 8. The fixed gear 11 is fixedly connected to the support frame 2 at the position aligned with the driven gear 10 via bolts. The inner end of the rotating shaft on the flip bridge plate 5 is connected to the planetary gear 12. The planetary gear 12 meshes with the corresponding fixed gear 11.

[0020] like Figure 2 and Figure 4 As shown, the transmission assembly includes a conveyor belt 14, a drive shaft 15, and a synchronization assembly 17. The drive shaft 15 is rotatably connected to the right side of the support frame 2. The drive shaft 15 is connected to both the front and rear ends of the main shaft 7 via the conveyor belt 14 to transmit power. The front and rear ends of the drive shaft 15 are connected to the corresponding flip hinge 16 drive shaft via the synchronization assembly 17. The synchronization assembly 17 consists of two pulleys, one large and one small, and a transmission belt. The large pulley is fastened to the drive shaft 15 via an expansion sleeve, and the small pulley is connected to the flip hinge 16 drive shaft via a flat key. The transmission belt is sleeved between the two pulleys. The diameter of the large pulley is twice that of the small pulley. Based on the principle of equal linear velocity of belt drive, when the large pulley rotates 90 degrees, the small pulley will rotate 180 degrees, thereby achieving precise transmission control of the flip hinge 16 drive shaft.

[0021] When the loading ramp is in its deployed state, the continuous inclined path it forms provides a safe and convenient access route for vehicles, meeting the needs of vehicles entering high-altitude work areas. After use, when it needs to be stored, the external servo motor is coaxially connected to the main shaft 7 via a coupling. The servo motor is started, and its high-precision encoder provides real-time feedback on speed and angle information. The motor output shaft rotates, driving the main shaft 7 to rotate, which in turn drives the drive gear 8. Through meshing with the driven gear 10, the drive gear 10 and the tilting block 9 rotate 90 degrees circumferentially around the connecting shaft 13. The tilting block 9 then drives the rotating shaft, tilting bridge plate 5, support legs 4, and planetary gear 12 to rotate upwards by 90 degrees. The planetary gear 12 rotates... During the process, the planetary gear 12 maintains engagement with the fixed gear 11. Since the fixed gear 11 is stationary, the planetary gear 12 rotates circumferentially with the flipping block 9 while also rotating on its own axis under the constraint of the fixed gear 11. This allows the flipping bridge plate 5 to rotate 90 degrees on top of its 90-degree circumferential rotation, ultimately flipping it over the support frame 2, completing the folding action of the flipping bridge plate 5. Simultaneously, the rotation of the main shaft 7 efficiently transmits power to the drive shaft 15 via the conveyor belt 14. The drive shaft 15 then transmits power to the drive shaft of the flipping hinge 16 via the synchronization component 17. In the synchronization component 17, based on the diameter transmission ratio of the large and small pulleys, when the large pulley rotates 90 degrees, the small pulley precisely rotates 180 degrees, thereby driving the flipping hinge 16 to flip the bottom bridge plate 6 upward by 180 degrees. This ensures that the bottom bridge plate 6 and the flipping bridge plate 5 fit tightly together in the folded state, significantly reducing the overall footprint of the loading ramp and facilitating transportation and storage. After the folding operation is completed, the connection between the servo motor and the main shaft 7 is disconnected, and the motor can be removed. When the loading ramp needs to be unfolded and put back into use, the servo motor is connected to the main shaft 7 again, the motor reverse program is set, and the motor runs in reverse to drive each transmission component to run along the opposite motion trajectory of the folding process, so as to achieve the precise unfolding and reset of the flip bridge plate 5 and the bottom bridge plate 6, so that the loading ramp is restored to its initial working state and meets the needs of vehicle loading and unloading operations.

Claims

1. A foldable and retractable lightweight mobile loading ramp, characterized in that, The system includes a mobile frame (1), a support frame (2), a boarding board (3), support feet (4), a flip bridge plate (5), a bottom bridge plate (6), a flip block (9), a connecting shaft (13), a flip hinge (16), a folding assembly, and a transmission assembly. The mobile frame (1) adopts a left-high-right-low inclined top surface structure design. The support frame (2) is fixedly installed on the top of the mobile frame (1), and the boarding board (3) is installed on the support frame (2). The support feet (4) are placed on the left side of the mobile frame (1). The top surface of the support feet (4) is also a left-high-right-low inclined structure and is on the same inclined straight line as the top surface of the mobile frame (1). The top of the support leg (4) is connected to a flip bridge plate (5). The right end of the flip bridge plate (5) is aligned with the left end of the boarding board (3). The right end of the boarding board (3) is rotatably mounted with a bottom bridge plate (6) through two front and rear flip hinges (16). The tilt angle of the bottom bridge plate (6) is strictly consistent with that of the boarding board (3). The left side of the support frame (2) is symmetrically connected to a connecting shaft (13). The outside of the connecting shaft (13) is connected to a flip block (9). The front and rear ends of the right side of the flip bridge plate (5) are respectively connected to a rotating shaft. The flip block (9) is rotatably connected to the rotating shaft on the flip bridge plate (5). The support frame (2) is equipped with a folding assembly and a transmission assembly.

2. A foldable and portable lightweight mobile loading ramp according to claim 1, characterized in that, The bottom of the mobile frame (1) is equipped with multiple universal wheels with bidirectional braking function at equal intervals. The universal wheels are equipped with high-strength polyurethane rubber wheel surfaces.

3. A foldable and portable lightweight mobile loading ramp according to claim 2, characterized in that, The main structure of the mobile frame (1) is made of high-strength aluminum alloy material in one piece, and the yield strength of the aluminum alloy material is not less than 200MPa.

4. A foldable and portable lightweight mobile loading ramp according to claim 3, characterized in that, The boarding platform (3), bottom bridge plate (6) and tipping bridge plate (5) are all made of patterned steel plate with a thickness of 8-12mm. The pattern on the surface of the patterned steel plate is rhomboid or lentil-shaped, and the pattern spacing is evenly distributed.

5. A foldable and portable lightweight mobile loading ramp according to claim 4, characterized in that, The folding assembly includes a main shaft (7), a driving gear (8), a driven gear (10), a fixed gear (11), and a planetary gear (12). The main shaft (7) is rotatably connected to the left side of the support frame (2). The driving gear (8) is connected to both the front and rear ends of the main shaft (7). The driven gear (10) is connected to the outer end of the connecting shaft (13). The driven gear (10) meshes with the corresponding driving gear (8). The fixed gear (11) is fixedly connected to the position on the support frame (2) that is aligned with the driven gear (10). The planetary gear (12) is connected to the inner end of the rotating shaft on the flip bridge plate (5). The planetary gear (12) meshes with the corresponding fixed gear (11).

6. A foldable and portable lightweight mobile loading ramp according to claim 5, characterized in that, The transmission assembly includes a conveyor belt (14), a drive shaft (15), and a synchronization assembly (17). The right side of the support frame (2) is rotatably connected to the drive shaft (15). The drive shaft (15) is connected to both the front end and the rear end of the main shaft (7) by the conveyor belt (14). The front and rear ends of the drive shaft (15) are connected to the corresponding flip hinge (16) drive shaft by the synchronization assembly (17).

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