Highly mobile load bearing platform with large extension ratio

Abstract

The application provides a large-stretch-ratio high-mobility carrying platform. The carrying platform comprises two first carrying platforms, a second carrying platform and two connecting devices. The three carrying platforms are connected by the connecting devices, the overall stretching and folding can be realized, different lengths of goods can be adapted, the stretching ratio is large and storage is convenient. The structure is compact, the stretching and folding process is fast and efficient, and the mobility is high.

Description

Technical Field

[0001] This invention relates to the field of load-bearing platform technology, and in particular to a high-mobility load-bearing platform with a large telescoping ratio. Background Technology

[0002] A carrying platform is an automated transport tool that replaces manual handling of goods. In industries such as railway transportation, special industries, ports and airports, and heavy-duty vehicle manufacturing plants, the on-site transportation of large-sized and heavy-tonnage goods is quite common. This places higher demands on the size and load-bearing capacity of the carrying platform. In response, there are three existing technical solutions.

[0003] Specialized transport platforms are suitable for transporting specific heavy goods and have been used to some extent. However, this solution can generally only meet the transportation needs of goods with fixed dimensions. In some scenarios with strict requirements for storage space, the size of a single large transport platform is too large, thus occupying too much space and greatly affecting the transportation of goods and the storage of the transport platform, while also increasing development costs.

[0004] Split-type load-bearing platforms can be flexibly selected according to the size parameters of the load being transported, including the type, quantity, and transportation method of the load-bearing platform, to achieve optimal collaborative transportation results. For example, on a truck production line, multiple load-bearing platforms work together to transport the truck frame. However, this places excessively high demands on the control algorithm of the load-bearing platform, and the overall flatness, rigidity, and load-bearing capacity are uncertain, making it difficult to achieve the collaborative control precision required for special workpieces.

[0005] Telescopic loading platforms connect multiple platforms into a single unit using telescopic rods or hinges. This allows the entire platform to expand during transport and retract during storage, accommodating goods of varying sizes. This design offers high load-bearing capacity and overall rigidity, making it suitable for applications such as transporting car frames of different lengths on high-speed rail production lines. However, this type of platform generally has a relatively low telescopic ratio, limiting the range of sizes it can handle, and it still occupies considerable storage space. Summary of the Invention

[0006] The purpose of this invention is to provide a high-extension-ratio, high-mobility load-bearing platform to solve the problems existing in the prior art.

[0007] The technical solution adopted to achieve the purpose of this invention is as follows: a high telescopic ratio high mobility load-bearing platform, comprising two first load-bearing platforms, a second load-bearing platform, and two connecting devices.

[0008] The first support platform includes a first support platform body. The first support platform body has four side walls, which are sequentially labeled as side wall A, side wall B, side wall C, and side wall D. A guide pin is provided on side wall A. Slider blocks and guide rail clamps are provided on side walls B and D. The lower part of the first support platform body has a wheel mounting cavity. A steering wheel and a steering support wheel are arranged in the wheel mounting cavity.

[0009] The second support platform includes a second support platform body. The first support platform body has four side walls, which are sequentially labeled as side wall E, side wall F, side wall G, and side wall H. Guide pin cone holes are provided on side walls E and G. Slider blocks and guide rail clamps are provided on side walls F and H. The lower part of the second support platform body has a wheel mounting cavity. A steering wheel and a steering support wheel are arranged in the wheel mounting cavity.

[0010] Two first support platforms are arranged at an interval. A second support platform is arranged between the two first support platforms. The A sidewalls of the two first support platforms are respectively close to the E and G sidewalls of the second support platform. The first and second support platforms are connected by a connecting device.

[0011] The connecting device includes a first U-shaped fork arm, a second U-shaped fork arm, and a double hinge. Guide rails are mounted on the inner walls of the openings of the first and second U-shaped fork arms. Connecting bases are provided at the tail ends of the first and second U-shaped fork arms. The connecting bases are connected to the double hinges. The first load-bearing platform is housed in the opening of the first U-shaped fork arm. The second load-bearing platform is housed in the opening of the second U-shaped fork arm. A slider on the side wall of either the first or second load-bearing platform body is slidably connected to the guide rails. A guide rail clamp clamps the guide rails.

[0012] The dual-hinge system includes a first dual-output-shaft motor and a second dual-output-shaft motor. A reducer, a coupling, and a first gear are sequentially arranged on both sides of the first dual-output-shaft motor. The first gear is fixedly connected to the connecting base of the first U-shaped fork arm. A reducer, a coupling, and a second gear are sequentially arranged on both sides of the second dual-output-shaft motor. During operation, driving the first dual-output-shaft motor causes the first gear to rotate, which in turn rotates the first U-shaped fork arm to 90°. Driving the first dual-output-shaft motor then stops. Driving the second dual-output-shaft motor causes the second gear to rotate around its axis, and the first gear meshing with it rotates around the center of the second gear. This causes the dual-hinge system to rotate around the same center, simultaneously rotating the first U-shaped fork arm to 90°. Driving the second dual-output-shaft motor then stops, and the transport process begins.

[0013] Furthermore, the first support platform has a steering wheel and two steering support wheels.

[0014] Furthermore, the second load-bearing platform has two steering wheels and two steering support wheels.

[0015] Furthermore, the length of the first support platform is 'a'. The length of the second support platform is 2a.

[0016] The technical advantages of this invention are undeniable: the connecting device links three carrying platforms together, enabling overall telescopic and folding capabilities, thus adapting to goods of varying lengths. It boasts a large telescopic ratio (exceeding 2 times) and facilitates storage. The structure is compact, and the telescopic and folding process is fast and efficient. In industrial and defense fields, where carrying platforms need to be transferred between different work locations or scenarios using vehicles such as automobiles or railway carriages, the high telescopic ratio of this invention significantly reduces the length of the carrying platform during transfer, while simultaneously meeting the varying length requirements of different objects, achieving high mobility. The carrying platform's own drive system includes two or more steering wheels, enabling three-degree-of-freedom high-mobility movement of the carried object. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a high-extension-ratio, high-mobility load-bearing platform in its folded state.

[0018] Figure 2 A schematic diagram of a high-extension-ratio, high-mobility load-bearing platform in its fully retracted state;

[0019] Figure 3 A schematic diagram of a high-extension-ratio, high-mobility load-bearing platform in its fully extended state.

[0020] Figure 4 This is a schematic diagram of the first load-bearing platform structure;

[0021] Figure 5 This is a schematic diagram of the second load-bearing platform structure;

[0022] Figure 6 This is a schematic diagram of the connecting device;

[0023] Figure 7 This is a cross-sectional view of a double-hinge structure.

[0024] Figure 8 This is a schematic diagram of the tilting process of a high-extension-ratio, high-mobility load-bearing platform.

[0025] Figure 9 This is a schematic diagram of the scaling ratio of a high-mobility load-bearing platform with a large scaling ratio.

[0026] In the figure: First bearing platform 1, first bearing platform body 11, guide pin 12, second bearing platform 2, second bearing platform body 21, guide pin cone hole 22, connecting device 3, first U-shaped fork arm 31, second U-shaped fork arm 32, double hinge 33, rotating shaft 331, first gear 332, second gear 333, first double output shaft motor 334, second double output shaft motor 335, reducer 336, coupling 337, connecting base 34, steering wheel 4, steering support wheel 5, slider 6, guide rail clamp 7, guide rail 8. Detailed Implementation

[0027] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0028] Example 1:

[0029] This embodiment provides a high-mobility load-bearing platform with a large telescoping ratio, including two first load-bearing platforms 1, a second load-bearing platform 2, and two connecting devices 3.

[0030] The first support platform 1 includes a first support platform body 11. The first support platform body 11 has four side walls. The four side walls are sequentially labeled as side wall A, side wall B, side wall C, and side wall D. A guide pin 12 is provided on side wall A. A slider 6 and a guide rail clamp 7 are provided on side walls B and D. The lower part of the first support platform body 11 has a wheel mounting cavity. A steering wheel 4 and a steering support wheel 5 are arranged in the wheel mounting cavity.

[0031] The second support platform 2 includes a second support platform body 21. The first support platform body 11 has four side walls, which are sequentially labeled as side wall E, side wall F, side wall G, and side wall H. Guide pin conical holes 22 are provided on side walls E and G. Slider blocks 6 and guide rail clamps 7 are provided on side walls F and H. The lower part of the second support platform body 21 has a wheel mounting cavity. A steering wheel 4 and a steering support wheel 5 are arranged in the wheel mounting cavity.

[0032] Two first support platforms 1 are arranged at an interval. A second support platform 2 is arranged between the two first support platforms 1. The A sidewalls of the two first support platforms 1 are respectively close to the E sidewall and G sidewall of the second support platform 2. The first support platforms 1 and the second support platform 2 are connected by a connecting device 3.

[0033] The connecting device 3 includes a first U-shaped fork arm 31, a second U-shaped fork arm 32, and a double hinge 33. Guide rails 8 are mounted on the inner walls of the openings of the first U-shaped fork arm 31 and the second U-shaped fork arm 32. Connecting bases 34 are provided at the tail ends of the first U-shaped fork arm 31 and the second U-shaped fork arm 32. The connecting bases 34 are connected to the double hinges 33. The first bearing platform 1 is housed in the opening of the first U-shaped fork arm 31. The second bearing platform 1 is housed in the opening of the second U-shaped fork arm 32. A slider 6 on the side wall of the first bearing platform body 11 or the second bearing platform body 21 is slidably connected to the guide rails 8. A guide rail clamp 7 clamps the guide rails 8.

[0034] The double hinge 33 includes a housing, a first dual-output shaft motor 334, and a second dual-output shaft motor 335. The first dual-output motor 334 is fixed (by screws or welding) to the middle of one side of the housing. A reducer 336, a coupling 337, and a first gear 332 are sequentially arranged on both sides of the first dual-output shaft motor 334. One end of the coupling 337 is connected to the output shaft of the reducer 336, and the other end is connected to a rotating shaft 331, on which the first gear 332 is connected. The second dual-output shaft motor 335 also has a reducer 336, a coupling 337, and a second gear 333 sequentially arranged on both sides. The structure of the two sides of the second dual-output shaft motor 335 is similar to that of the two sides of the first dual-output motor 334. The connecting base 34 at the tail ends of the first U-shaped fork arm 31 and the second U-shaped fork arm 32 extends into the housing of the double hinge 33. The first gear 332 is sandwiched between the connecting base 34 of the first U-shaped fork arm 31 and the coupling 337. The second gear 333 is clamped between the connecting base 34 of the second U-shaped fork arm 32 and the coupling 337. The rotating shaft 331 passes through the corresponding connecting base 34. The first gear 332 is fixedly connected to the connecting base 34 of the first U-shaped fork arm 31. The second gear 333 is not fixedly connected to the connecting base 34 of the second U-shaped fork arm 32, but only makes simple contact with it.

[0035] During operation, the first dual-output shaft motor 334 is driven, causing the first gear 332 to rotate. The first gear 332 drives the first U-shaped fork arm 31 to rotate to 90°, at which point the drive of the first dual-output shaft motor 334 stops. The second dual-output shaft motor 334 is then driven, causing the second gear 333 to rotate around its axis. The first gear 332, which meshes with the second gear 333, rotates around the center of the second gear 333, causing the double hinges 33 to rotate around the same center. Simultaneously, this drives the first U-shaped fork arm 31 to rotate to 90°, at which point the drive of the second dual-output shaft motor 334 stops, and the conveying operation begins.

[0036] See Figures 1 to 3The stretched and contracted states represent the usage state, while the folded state represents the storage and transportation state. In the carrying platform, there are two first carrying platforms 1, connected to both sides of a second carrying platform 2 via a connecting device 3. The length of the second carrying platform 2 is twice the length of the first carrying platform 1. During handling, opposing driving forces are applied to the first carrying platforms 1 and the second carrying platforms 2, allowing them to move relative to each other along the connecting device 3. This controls the overall length, achieving stepless expansion and contraction, thus adapting to goods of different lengths. At the end of handling, the connecting device 3 also allows the two first carrying platforms 1 to automatically flip onto the second carrying platform 2, reducing the overall volume.

[0037] This embodiment meets the size and load-bearing capacity requirements of the carrying platform for the in-plant transportation of large, heavy goods. It has a wide applicable size range, high load-bearing capacity, large telescopic ratio, and small footprint, facilitating storage and transportation. It features stepless telescopic adjustment and flexible telescopic movement, offering high maneuverability. Utilizing multiple steering wheels, with each module individually driven, it facilitates control and allows for different angle adjustments. The guide pin device provides guiding and docking functions, enabling precise positioning.

[0038] Example 2:

[0039] The main structure of this embodiment is the same as that of Embodiment 1, wherein the first load-bearing platform 1 has one steering wheel 4 and two steering support wheels 5. The steering wheel 4 mainly functions as a drive and steering control wheel, and each steering wheel can achieve 360° high-precision synchronous steering. The steering support wheels 5 mainly function as steering and support wheels, and are equipped with steering motors. They can also actively control steering with 360° high precision to avoid cornering jamming due to excessive load, thereby achieving flexible steering under heavy load conditions. A mounting cavity for the steering wheel 4 and steering support wheels 5 is provided under the body 11 of the first load-bearing platform. The mounting method is as follows: a single steering wheel is installed in the front center position, and the two steering support wheels are symmetrically installed on both rear sides. This "one steering wheel + two steering support wheels" layout gives the first load-bearing platform 1 independent drive and steering functions, facilitating self-tracking control.

[0040] The second load-bearing platform 2 has two steering wheels 4 and two steering support wheels 5. The steering wheels 4 and steering support wheels 5 are installed symmetrically: one steering wheel is installed at the front and rear, and one steering support wheel is arranged on each side. This "two steering wheels + two steering support wheels" layout also gives the second load-bearing platform 2 independent drive and steering functions, while increasing load-bearing capacity and stability. Furthermore, it has better rigidity compared to traditional four-wheeled load-bearing platforms.

[0041] In terms of overall layout, it adopts a "four + six" wheel system, with four steering wheels arranged in a row along the central axis of the vehicle body, and six steering support wheels arranged around the perimeter of the vehicle body. In this arrangement, the steering wheels only provide driving force to the load-bearing platform, while almost all the load is borne by the steering support wheels. The number of steering support wheels can be increased according to the load capacity. It has good stability and strong load-bearing capacity. At the same time, the coordinated operation of multiple steering wheels can improve the maneuverability of the load-bearing platform, enabling it to travel in any direction and rotate around any point on a plane, demonstrating powerful omnidirectional movement capability.

[0042] Example 3:

[0043] The main structure of this embodiment is the same as that of Embodiment 1, wherein the length of the first support platform 1 is a, and the length of the second support platform 2 is 2a.

[0044] This connecting device enables the heavy-duty platform to have stepless telescopic adjustment and automatic folding functions, and significantly increases the telescopic ratio, greatly expanding the range of applicable cargo sizes. The telescopic ratio is calculated below. Figure 9 As shown, the length of the first supporting platform 1 is 'a', the length of the second supporting platform 2 is 'b', and b = 2a. The gap between the two platforms when stretched to their maximum length is 'c'. The expansion and contraction ratio is calculated as follows:

[0045] The maximum tensile length of the load-bearing platform is:

[0046] L max =2a+b+2c

[0047] The folded length is:

[0048] L min =b=2a

[0049] The scaling ratio is:

[0050] .

Claims

1. A high-mobility load-bearing platform with a large telescoping ratio, characterized in that: It includes two first bearing platforms (1), a second bearing platform (2), and two connecting devices (3); The first carrying platform (1) includes a first carrying platform body (11); the first carrying platform body (11) has four side walls; the four side walls are sequentially labeled as side wall A, side wall B, side wall C and side wall D; a guide pin (12) is provided on side wall A; a slider (6) and a guide rail clamp (7) are provided on side wall B and side wall D; the lower part of the first carrying platform body (11) has a wheel mounting cavity; a steering wheel (4) and a steering support wheel (5) are arranged in the wheel mounting cavity; The second carrying platform (2) includes a second carrying platform body (21); the first carrying platform body (11) has four side walls; the four side walls are sequentially labeled as side wall E, side wall F, side wall G and side wall H; guide pin cone holes (22) are provided on side wall E and side wall G; sliders (6) and guide rail clamps (7) are provided on side wall F and side wall H; the lower part of the second carrying platform body (21) has a wheel mounting cavity; a steering wheel (4) and a steering support wheel (5) are arranged in the wheel mounting cavity; Two first bearing platforms (1) are arranged at intervals; a second bearing platform (2) is arranged between the two first bearing platforms (1); the A sidewall of the two first bearing platforms (1) is close to the E sidewall and G sidewall of the second bearing platform (2) respectively; the first bearing platforms (1) and the second bearing platform (2) are connected by a connecting device (3); The connecting device (3) includes a first U-shaped fork arm (31), a second U-shaped fork arm (32), and a double hinge (33); guide rails (8) are installed on the inner walls of the openings of the first U-shaped fork arm (31) and the second U-shaped fork arm (32); a connecting base (34) is provided at the tail end of the first U-shaped fork arm (31) and the second U-shaped fork arm (32); the connecting base (34) is connected to the double hinge (33); the first bearing platform (1) is accommodated in the opening of the first U-shaped fork arm (31); The second support platform (2) is housed in the opening of the second U-shaped fork arm (32); The slider (6) on the side wall of the first carrier platform body (11) or the second carrier platform body (21) is slidably connected to the guide rail (8); the guide rail clamp (7) clamps the guide rail (8); The double hinge (33) includes a first double output shaft motor (334) and a second double output shaft motor (335); a reducer (336), a coupling (337) and a first gear (332) are arranged sequentially on both sides of the first double output shaft motor (334); the first gear (332) is fixedly connected to the connecting base (34) of the first U-shaped fork arm (31); a reducer (336), a coupling (337) and a second gear (333) are arranged sequentially on both sides of the second double output shaft motor (335); During transport, opposite driving forces are applied to the first bearing platform (1) and the second bearing platform (2) respectively. The relative movement of the first bearing platform (1) and the second bearing platform (2) controls the overall length, realizing stepless extension and retraction. After the transport is completed, the connecting device (3) causes the two first bearing platforms (1) to flip onto the upper surface of the second bearing platform (2).

2. The high telescopic ratio, high mobility load-bearing platform according to claim 1, characterized in that: The first bearing platform (1) has a steering wheel (4) and two steering support wheels (5).

3. The high telescopic ratio, high mobility load-bearing platform according to claim 1, characterized in that: The second bearing platform (2) has two steering wheels (4) and two steering support wheels (5).

4. The high telescopic ratio, high mobility load-bearing platform according to claim 1, characterized in that: The length of the first support platform (1) is a; the length of the second support platform (2) is 2a.

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