A loading platform

Abstract

The application discloses a loading and unloading platform, which comprises a walking chassis, a conveying frame for placing material pallets and a lifting scissors support between the walking chassis and the conveying frame, the walking chassis comprises a vehicle frame, one end of the vehicle frame is provided with a first wheel set, the first wheel set is provided with a first rocker arm hinged to the vehicle frame, the other end of the vehicle frame is provided with a second wheel set, the second wheel set is provided with a second rocker arm hinged to the vehicle frame, two rows of first walking wheels are arranged on the first wheel set, two rows of second walking wheels are arranged on the second wheel set, and a first telescopic rod is arranged between the vehicle frame and the first rocker arm; the loading and unloading platform has the beneficial effects that the height of the walking chassis is adjustable, the stability is relatively strong, and different carrying road conditions can be adapted; meanwhile, according to different postures of the equipment to be connected, the lifting scissors support can adaptively adjust the posture of the conveying frame (and the material pallets placed thereon), and alignment is facilitated.

Description

Technical Field

[0001] This invention relates to the field of material transfer technology, and in particular to a loading and unloading platform. Background Technology

[0002] A loading and unloading platform is a large airport loading and unloading shuttle vehicle that can lift, unload, and shuttle bulk cargo such as containerized material units, airdrop units, and bulk cargo.

[0003] Currently, most loading and unloading platforms used at airports are self-propelled vehicles. These vehicles are controlled via a driver's module (steering, throttle, brakes, etc.), and the lifting and transfer mechanisms are controlled via handles or buttons to complete loading, unloading, and transfer operations. During operation, the driver needs to gradually adjust the vehicle's position and attitude based on the relative position between the aircraft and the loading and unloading platform to complete the docking. Existing loading and unloading platforms still have the following problems in use: First, the vehicle's chassis height is fixed, resulting in poor stability during transport; second, the pallets are placed on the transfer frame, and the alignment of the transfer frame relies solely on the vehicle's movement; the pallets cannot move independently, making the alignment process complex; third, the lifting scissor bracing only has lifting functionality and cannot finely adjust the attitude of the transfer frame, further increasing the difficulty of alignment and transfer.

[0004] The patent application with application number "CN 202420719405.X" discloses "an airport cargo transportation loading and unloading platform". Although it realizes the transfer of airport cargo pallets, it still fails to realize the movement of the material pallets relative to the transmission frame, nor does it realize the raising and lowering of the vehicle chassis height. There are still some shortcomings when cargo transfer and docking. Summary of the Invention

[0005] The purpose of this invention is to provide a loading and unloading platform that can adjust material pallets from multiple angles and in all directions, significantly reducing labor and transportation costs, reducing safety risks in the process, and improving alignment accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A loading and unloading platform includes a chassis, a transmission frame for placing material pallets, and a lifting scissor brace located between the chassis and the transmission frame. The chassis includes a frame, one end of which is provided with a first wheel set having a first rocker arm hinged to the frame. The other end of the frame is provided with a second wheel set having a second rocker arm hinged to the frame. The first wheel set has two rows of first traveling wheels, and the second wheel set has two rows of second traveling wheels. A first telescopic rod is provided between the frame and the first rocker arm, and a second telescopic rod is provided between the frame and the second rocker arm. The first and second traveling wheels rotate to drive the frame to move horizontally, and the first and second telescopic rods extend and retract to drive the frame to rise and fall vertically. The transmission frame is equipped with a longitudinal transmission device for longitudinally transporting material pallets and a transverse transmission device for transversely transporting material pallets. The longitudinal transmission device has a longitudinal moving roller that contacts the bottom of the material pallet, and the transverse transmission device has a transverse moving roller that contacts the bottom of the material pallet. The transverse moving roller is connected to a power push rod that drives its lifting and lowering. The lowest descending height of the transverse moving roller is lower than the height of the longitudinal moving roller, and the highest ascending height of the transverse moving roller is higher than the height of the longitudinal moving roller. The lifting scissor brace includes an outer support, with an inner support hinged to the inner wall of the outer support. The upper end of the outer support is equipped with a horizontal rolling cylinder that connects to the transmission frame, and the lower end of the outer support is equipped with a first roller mechanism that connects to the traveling chassis. The upper end of the inner support is equipped with a second roller mechanism that connects to the transmission frame, and the lower end of the inner support is hinged to the traveling chassis. A main lifting cylinder that adjusts the height of the transmission frame is provided between the outer support and the traveling chassis.

[0007] Preferably, the first wheel set further includes a first crossbeam, the first rocker arm is mounted on the first crossbeam, the two ends of the first crossbeam are respectively provided with first balance beams, the two rows of first travel wheels are respectively mounted on the two first balance beams, and the two ends of the first telescopic rod are respectively hinged to the frame and the first rocker arm. The second wheel set also includes a second crossbeam, with a crossbeam hole in the middle of the second crossbeam. The second rocker arm is provided with a rocker arm shaft that is rotatably connected to the crossbeam hole. The two ends of the second crossbeam are respectively provided with second balance beams. The two rows of second travel wheels are respectively installed on the two second balance beams. The two ends of the second telescopic rod are respectively hinged to the frame and the second rocker arm.

[0008] Preferably, both the first rocker arm and the second rocker arm have rocker arm holes, the frame is provided with a frame axle rotatably connected to the rocker arm holes, the first balance beam has a balance beam hole in the middle, both ends of the first crossbeam are provided with crossbeam axles rotatably connected to the balance beam holes, the first traveling wheel is mounted on a wheel shell, the wheel shell is rotatably connected to the first balance beam, and the first balance beam is provided with a third telescopic rod that can drive the wheel shell to rotate around the first balance beam.

[0009] Preferably, a telescopic rod support is provided on the first balance beam, one end of the third telescopic rod is hinged to the telescopic rod support, the other end of the third telescopic rod is hinged to the telescopic rod connecting part, a wheel housing hole is provided on the wheel housing hole, and a connecting shaft that is rotatably connected to the telescopic rod connecting part is provided on the telescopic rod connecting part.

[0010] Preferably, the longitudinal conveying device includes two rows of parallel and identical active longitudinal transfer units, each row of active longitudinal transfer units is provided with a longitudinal moving force unit, the longitudinal transfer rollers include two rows of active longitudinal transfer rollers driven individually by the two rows of longitudinal moving force units, a parallel shaft assembly is provided between the two rows of active longitudinal transfer rollers, and at least one row of driven longitudinal transfer units is also provided between the two rows of active longitudinal transfer units.

[0011] Preferably, the transverse conveying device includes at least one row of transverse units, each row of transverse units has the same structure, each row of transverse units includes one or more transverse roller groups connected to each other, the transverse roller group includes a support and a connecting plate, the middle part of the connecting plate is hinged to the support, one side of the connecting plate is connected to a lifting swing frame, the lifting swing frame is connected to a power push rod that pushes it up and down, the other side of the connecting plate is connected to a bracket, and the transverse roller is mounted on the bracket; The power push rod moves left and right to drive the lifting swing frame to swing left and right, which in turn drives the connecting plate to swing left and right, and finally drives the bracket and the transverse roller to swing right and left, thereby realizing the raising and lowering of the transverse roller.

[0012] Preferably, the lifting swing frame includes two parallel lifting swing rods, which are connected by a lifting connecting rod. Multiple transverse roller groups are connected in sequence by a sliding shoe lifting long tie rod. The two ends of the sliding shoe lifting long tie rod are respectively hinged to the lifting swing rods in two adjacent transverse roller groups. One of the transverse roller groups has a power push rod connected to a telescopic power unit, which extends and retracts to move the power push rod left and right.

[0013] Preferably, the material pallet is provided with two guide blocks, and the transverse transmission device further includes a guide rail provided on the transmission frame. The guide rail is located between the two guide blocks and the extension direction of the guide rail is consistent with the longitudinal transmission direction of the material pallet. The guide rail is also connected to a transverse movement force unit that drives it to move laterally. When the guide rail moves laterally, it drives the material pallet to move laterally.

[0014] Preferably, the external support includes two symmetrically arranged external shear support beams, and each of the two external shear support beams is provided with a horizontal rolling cylinder at its end. One of the two horizontal rolling cylinders rises and the other falls to adjust the left and right tilt angle of the transmission frame. A first crossbeam is provided between the two external shear support beams to connect them as one unit. The first crossbeam is provided with an ear seat for connecting the main lifting cylinder. The upper end of the external shear support beam is provided with a U-shaped groove for connecting the horizontal rolling cylinder. The side wall of the rolling cylinder is provided with a protrusion that can extend into a U-shaped groove, and the rolling cylinder is also provided with a rolling cylinder pin that connects to the transmission frame.

[0015] Preferably, the inner support is provided with a pitch cylinder for adjusting the forward and backward tilt angle of the transmission frame. The inner support includes two parallel inner shear support beams. The inner shear support beam includes a lower inner shear support section and an upper inner shear support section that are hinged to each other. A second crossbeam is provided between the two lower inner shear support sections to connect them as one unit. A connecting beam is provided between the two upper inner shear support sections to connect them as one unit. The lower section of the inner shear support includes a lower beam, and a crank arm is provided at the upper end of the lower beam. The crank arm is provided with a first mounting hole for the pitch cylinder that connects to one end of the pitch cylinder. The upper section of the inner shear support includes an upper beam, and a second mounting hole for the pitch cylinder that connects to the other end of the pitch cylinder is provided on the upper beam.

[0016] The beneficial effects of this invention are as follows: 1. The loading and unloading platform disclosed in this application has an adjustable chassis height, strong stability, and can adapt to different transportation road conditions. At the same time, according to the different postures of the equipment to be docked, the lifting scissor brace can adaptively adjust the posture of the transmission frame (and the material pallet placed on it) to facilitate alignment. The material pallet can also move independently and autonomously relative to the transmission frame, further improving the accuracy of alignment adjustment.

[0017] 2. In the first wheel assembly, the first crossbeam and the first rocker arm are fixedly connected, while in the second wheel assembly, the second crossbeam and the second rocker arm are rotatably connected. This achieves highly adaptable three-point constraint and dynamic attitude decoupling control. One end of the suspension is rigidly connected to the liftable swing arm, while the other end of the suspension is hinged to the same swing arm via a central pin, thus forming an asymmetrical three-point support configuration of "one end fixed + one end floating". This structure ensures the longitudinal stiffness of the entire vehicle while allowing one end to freely swing laterally around the Y-axis (perpendicular to the direction of travel), effectively releasing torsional internal stress caused by uneven road surfaces, uneven loading, or small-radius steering. This significantly improves the chassis's passability and structural durability under longitudinal slopes, transverse slopes, and small curves. 3. During longitudinal conveying, the longitudinal rollers are higher than the transverse rollers. At this time, the transverse rollers do not contact the pallet, and the longitudinal rollers drive the pallet to move longitudinally by rotating. When transverse conveying is required, the transverse rollers are higher than the longitudinal rollers. At this time, the longitudinal rollers do not contact the pallet, and the pallet can be driven to move laterally. When the transverse conveying device is in use, the lifting swing frame is raised and lowered by the power push rod, which in turn drives the transverse rollers to rise and fall, so that the transverse rollers contact or detach from the material.

[0018] 4. The lifting scissor brace is equipped with a roll cylinder, a pitch cylinder, and a main lifting cylinder. The height of the lifting scissor brace, the transmission frame, and the material pallet can be adjusted by extending and retracting the main lifting cylinder. The tilt angle of the lifting scissor brace, the transmission frame, and the material pallet can be adjusted by extending and retracting the pitch cylinder. The left and right tilt angle of the lifting scissor brace, the transmission frame, and the material pallet can be adjusted by extending and retracting the two roll cylinders asynchronously. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device; Figure 2 This is a structural diagram of the chassis. Figure 3 This is a front view of the device with the chassis lowered to its lowest position; Figure 4 This is a front view of the device with the chassis raised to its highest position; Figure 5 This is a structural diagram of the vehicle frame; Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the structure of the first round group; Figure 8 This is a structural schematic diagram of the first crossbeam and the first rocker arm; Figure 9 This is a schematic diagram of the first balance beam. Figure 10This is a schematic diagram of the installation of the third telescopic rod and the rod in the same direction; Figure 11 This is a schematic diagram of the third telescopic rod. Figure 12 This is a schematic diagram of the structure of the first traveling wheel; Figure 13 This is a schematic diagram of the structure of the second round group; Figure 14 This is a schematic diagram of the second rocker arm; Figure 15 This is a structural diagram of the transmission frame (the side guardrails are hidden). Figure 16 This is a schematic diagram of the longitudinal transmission device; Figure 17 for Figure 16 A partial schematic diagram at point I in the middle; Figure 18 for Figure 17 A partial schematic diagram of section II in the middle; Figure 19 for Figure 16 Top view of the middle section of the structure; Figure 20 for Figure 19 Top view of the parallel shaft assembly; Figure 21 for Figure 15 A schematic diagram of the structure of a single transverse unit; Figure 22 for Figure 21 The main view; Figure 23 This is a schematic diagram of the structure of the first transverse roller group; Figure 24 This is a structural schematic diagram of the first transverse roller group from another angle; Figure 25 This is a structural schematic diagram of the third angle of the first transverse roller group; Figure 26 This is a schematic diagram of the structure of the first connecting plate in the first transverse roller group; Figure 27 This is a schematic diagram of the structure of the second transverse roller group; Figure 28 This is a structural schematic diagram of the second transverse roller group from another angle; Figure 29 A structural diagram showing the placement of material pallets on a transport frame (the side guardrails are hidden). Figure 30 for Figure 29 The main view; Figure 31 for Figure 30 A magnified view of a section at point III; Figure 32 This is a schematic diagram of the guide rail structure; Figure 33 for Figure 32 Enlarged view of a section at point IV; Figure 34 This is the front view of the lifting scissor brace; Figure 35 This is a schematic diagram of the lifting shear brace structure; Figure 36 This is a schematic diagram of the external support structure; Figure 37 This is a schematic diagram of the structure of a horizontal rolling cylinder; Figure 38 This is a schematic diagram of the internal support structure; Figure 39 This is a structural schematic diagram of the lower section of the internal shear brace; Figure 40 This is a schematic diagram of the upper section of the internal shear brace; Figure 41 This is a schematic diagram of the main lifting cylinder.

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings. Example

[0022] like Figure 1 As shown, a loading and unloading platform in this embodiment includes a chassis 3000, a transmission frame 2600 for placing material pallets, and a lifting scissor brace 5000 located between the chassis 3000 and the transmission frame 2600. A driver's cab 6000 is also provided at one end of the transmission frame 2600. A hydraulic system 6001 and an electrical system 6002 are arranged on the chassis 3000. The chassis 3000 is powered by a diesel engine. The driver's cab 6000 is equipped with a control structure, a comprehensive management system, an air conditioner, a heater, a driver's seat, etc. The control structure is used for operating and controlling the loading and unloading platform. The hydraulic system 6001 obtains power from the diesel engine and controls the movement of hydraulic motors, hydraulic cylinders, and other actuators through a hydraulic pump. The electrical system 6002 mainly consists of a battery, lighting, a power distribution system, and a control system. The control system is used for operating and controlling the loading and unloading platform.

[0023] like Figure 2 — Figure 14As shown, the chassis includes a frame 3300, with a first wheel set 3100 hinged to one end and a second wheel set 3200 hinged to the other end. The first wheel set 3100 has two rows of first traveling wheels, and the second wheel set 3200 has two rows of second traveling wheels. To achieve chassis lifting, a first telescopic rod 3121 is provided between the frame 3300 and the first wheel set 3100, and a second telescopic rod 3221 is provided between the frame 3300 and the second wheel set 3200. In this embodiment, both the first telescopic rod 3121 and the second telescopic rod 3221 are hydraulic cylinders. The rotation of the first and second traveling wheels drives the frame 3300 to move horizontally, and the extension and retraction of the first and second telescopic rods drive the frame 3300 to lift vertically.

[0024] The first wheel assembly 3100 includes a first crossbeam 3110, on which a first rocker arm 3120 of an articulated frame 3300 is mounted. First balance beams 3130 are respectively mounted at both ends of the first crossbeam 3110. Two rows of first traveling wheels are respectively mounted on the two first balance beams 3130. The two ends of the first telescopic rod 3121 are respectively hinged to the frame 3300 and the first rocker arm 3120.

[0025] A connecting part 3302 for hinged first telescopic rod 3121 is provided on the frame 3300. A frame axle 3301 is provided on the frame 3300. A rocker arm hole 3122 is opened at the end of the first rocker arm 3120. The frame axle 3301 extends into the rocker arm hole 3122 and is rotatably connected to it. A receiving groove 3303 for accommodating the first rocker arm 3120 is also provided on the frame 3300. When the first telescopic rod 3121 extends and the frame 3300 moves upward, the first rocker arm 3120 moves out of the receiving groove 3303 (actually, the frame 3300 and the receiving groove 3303 move away from the first rocker arm 3120); when the first telescopic rod 3121 retracts and the frame 3300 moves downward, the first rocker arm 3120 moves into the receiving groove 3303 (actually, the frame 3300 and the receiving groove 3303 move and are locked outside the first rocker arm 3120). A rubber pad 3112 is also provided on the upper surface of the first crossbeam 3110 to prevent it from colliding with the frame 3300 when the frame 3300 moves down to its lowest point, thus protecting both of them.

[0026] The first balance beam 3130 has a balance beam hole 3132 in the middle, and the first crossbeam 3110 has a crossbeam shaft 3111 at both ends. The crossbeam shaft 3111 extends into the balance beam hole 3132 and is rotatably connected to it. When the road surface is uneven or has potholes, the rotation ensures that the traveling wheels will not be suspended in the air.

[0027] When the frame 3300 moves upward, the first rocker arm 3120 also swings upward simultaneously. The swing of the first rocker arm 3120 is based on the connection between the crossbeam shaft 3111 and the balance beam hole 3132 as the fulcrum, and swings upward through the hinge of the frame shaft 3301 and the rocker arm hole 3122. The action is reversed when moving downward, which will not be described in detail here.

[0028] The first traveling wheels are divided into two rows, which are respectively installed on two first balance beams 3130. Each row of first traveling wheels includes two identical wheel bodies 3133. The wheel bodies 3133 are installed on wheel shells 3131, and the wheel shells 3131 are installed on the first balance beams 3130. The wheel shells 3131 and the first balance beams 3130 are connected by pins. The wheel shells 3131 can drive the wheel bodies 3133 to rotate around the first balance beams 3130 to achieve chassis steering.

[0029] A first steering part 3140 for driving the first traveling wheel to rotate is provided on the first balance beam 3130. The first steering part 3140 includes a third telescopic rod 3141. The extension and retraction of the third telescopic rod 3141 drives the rotation of the wheel housing 3131. The two ends of the third telescopic rod 3141 are respectively connected to the first balance beam 3130 and the telescopic rod connecting part 3143. In this embodiment, the third telescopic rod 3141 is a hydraulic cylinder.

[0030] A wheel housing hole is provided on the wheel housing 3131, and a first pin 3145 is provided on the telescopic rod connecting part 3143. The first pin 3145 is rotatably installed in the wheel housing hole of the wheel housing 3131 to achieve a rotatable connection between the two. Both ends of the third telescopic rod 3141 are provided with connecting holes, and a second pin 3144 is also provided on the telescopic rod connecting part 3143. The second pin 3144 is rotatably installed in the connecting hole at one end of the third telescopic rod 3141. A telescopic rod support 3146 is provided on the first balance beam 3130, and a third pin is also provided on the telescopic rod support 3146, which is rotatably installed in the connecting hole at the other end of the third telescopic rod 3141.

[0031] To ensure that the wheel bodies 3133 and wheel housings 3131 of the two first traveling wheels in the same row rotate synchronously, a commutator rod 3142 is provided between the two wheel housings 3131. One end of the commutator rod 3142 is fixedly connected to the telescopic rod connecting part 3143 (as shown above, the telescopic rod connecting part 3143 is hinged to one wheel housing 3131), and the other end of the commutator rod 3142 has a fourth pin, which rotatably extends into the wheel housing hole of the other wheel housing 3131.

[0032] To detect the rotation angle of the wheel body 3133 in real time and ensure the controllability of the chassis steering operation, a steering encoder is installed on the wheel housing 3131. One steering encoder is sufficient for each row of first traveling wheels (i.e., two wheel bodies 3133 connected by a rod 3142 in the same direction). The steering encoder is a conventional, existing product used to detect the steering angle of the wheels; its detection principle will not be detailed in this embodiment.

[0033] The second wheel assembly 3200 includes a second crossbeam 3210 and a second rocker arm 3220 of an articulated frame. A crossbeam hole 3213 is provided in the middle of the second crossbeam 3210. A rocker arm shaft 3223, rotatably connected to the crossbeam hole 3213, is provided on the second rocker arm 3220. Second balance beams 3230 are respectively provided at both ends of the second crossbeam 3210. Two rows of second travel wheels are respectively mounted on the two second balance beams 3230. The two ends of the second telescopic rod 3221 are hinged to the frame 3300 and the second rocker arm 3220, respectively. A second steering part 3240, which drives the second travel wheels to rotate, is provided on the second balance beam 3230.

[0034] The structure of the second wheel assembly 3200 and its connection to the frame 3300 are identical to those of the first wheel assembly 3100. The only difference between the second wheel assembly 3200 and the first wheel assembly 3100 is that in the first wheel assembly 3100, the first crossbeam 3110 and the first rocker arm 3120 are fixedly connected by bolts, while in the second wheel assembly 3200, the second crossbeam 3210 and the second rocker arm 3220 are rotatably connected by the rocker arm shaft 3223. The advantages of this arrangement are: it forms a stable three-point support system with "one end left / right fulcrum + the other end center pin" as the vertex, and the line connecting the three points forms an isosceles triangle, ensuring that the static stability angle meets the usage conditions; through the reconstruction of the suspension-frame connection relationship, a stable and reliable three-point support system is naturally formed; it not only meets the adaptive grounding and uniform force bearing of each wheel assembly on uneven road surfaces, but also supports the platform as a whole in high-precision, low-disturbance coordinated adjustment in the transverse, longitudinal, and vertical directions.

[0035] In this embodiment, the first wheel set 3100 is installed at the front end of the frame 3300, and the second wheel set 3200 is installed at the rear end of the frame 3300.

[0036] When the chassis of this device is lowered, it is suitable for situations where climbing hills and high-speed driving are not required. When the chassis is raised, it can improve the vehicle's passability and meet the needs of use in complex road conditions.

[0037] The chassis of this application adopts a "three-point" suspension layout and adds a longitudinal balance beam. Compared with traditional rigid-connected multi-axle chassis, single-point support balance suspension, or hydraulic platforms that require external leveling, this change not only results in a more uniform load distribution but also increases the geometric degrees of freedom during suspension oscillation, making the chassis more adaptable to complex road conditions. The front and rear wheels arranged on the same balance beam better achieve load uniformity, change the force transmission path, and realize a two-level distribution of load from the crossbeam to the tires.

[0038] like Figure 15 — Figure 33 As shown, the transmission frame 2600 is provided with a longitudinal transmission device 2000 for longitudinal transmission of the material pallet 2500 and a transverse transmission device 1000 for transverse transmission of the material pallet 2500. The longitudinal transmission device 2000 has a longitudinal moving roller that contacts the bottom of the material pallet 2500, and the transverse transmission device 1000 has a transverse moving roller that contacts the bottom of the material pallet 2500. The transverse moving roller is connected to a power push rod that drives its lifting and lowering. When the material pallet 2500 moves longitudinally, the transverse rollers descend until their height is lower than that of the longitudinal rollers. Driven by the longitudinal rollers, the material pallet 2500 moves longitudinally. When the material pallet 2500 needs to be moved laterally, the transverse rollers rise until their height is higher than that of the longitudinal rollers. At this time, the transverse rollers contact the material pallet 2500 and drive it to move laterally.

[0039] The longitudinal conveying device 2000 includes two rows of parallel active longitudinal transfer units 2100 with identical specifications. Each row of active longitudinal transfer units includes multiple active roller units arranged sequentially. In this embodiment, the active roller units are divided into a large active roller unit 2110 and a small active roller unit 2120. The large active roller unit 2110 is provided with a longitudinal movement force unit 2112 (which may be a hydraulic motor, an electric motor, etc.). The longitudinal transfer rollers include active longitudinal transfer rollers 2111 installed in the large active roller unit 2110 and the small active roller unit 2120. The longitudinal conveying device 2000 also includes two rows of driven longitudinal transfer units, which have the same conveying direction as the driving longitudinal transfer unit. The longitudinal transfer rollers also include driven longitudinal transfer rollers 2300 in the driven longitudinal transfer units.

[0040] The large active roller unit 2110 is equipped with three active longitudinal rollers 2111, which are connected by a conveyor chain 2113. The small active roller unit 2120 is equipped with two active longitudinal rollers 2111, which are also connected by a conveyor chain 2113. The large active roller unit 2110 and the small active roller unit 2120 are arranged alternately to form an active longitudinal unit 2100.

[0041] A parallel shaft assembly 2200 is provided between the two rows of active longitudinal rollers 2111 of the two large active roller units 2110.

[0042] The parallel shaft assembly 2200 includes a parallel shaft 2204, the two ends of which are connected to two rows of active longitudinal transfer rollers 2111 via universal joint drive shafts 2202. During normal conveying, the rotational speeds of the two longitudinal transfer units 2112 are consistent, ensuring the normal conveying of materials. If an unexpected situation causes a change in the rotational speed of the two longitudinal transfer units 2112, the parallel shaft assembly 2200 can also ensure that the rotational speeds of the two rows of active longitudinal transfer rollers 2111 are consistent, preventing the materials from deviating during conveying.

[0043] The two ends of the parallel shaft 2204 are respectively provided with first bearings 2203, and the ends of the parallel shaft 2204 pass through the two first bearings 2203. Universal couplings 2201 are hinged to both ends of the universal joint drive shaft 2202. One universal coupling 2201 is connected to one end of the parallel shaft 2204, and the other universal coupling 2201 is connected to the central shaft of the drive roller 2111.

[0044] In this embodiment, the first bearing 2203 is a mounted bearing, and its bearing housing is mounted on the parallel shaft bracket 2205.

[0045] The universal joint drive shaft 2202 is a telescopic shaft. During the rotation of the roller, it will drive the universal joint drive shaft 2202 to perform piston movement (i.e., telescopic movement).

[0046] The transverse conveying device 1000 includes six rows of transverse moving units, each row having an identical structure. Each row of transverse moving units includes three interconnected transverse moving roller groups. In this embodiment, the three transverse moving roller groups are a first transverse moving roller group 1100, a second transverse moving roller group 1200, and a third transverse moving roller group 1300. One side of the second transverse moving roller group 1200 is connected to the first transverse moving roller group 1100 via a sliding shoe lifting long tie rod 1400, and the other side of the second transverse moving roller group 1200 is also connected to the third transverse moving roller group 1300 via a sliding shoe lifting long tie rod 1400. The structures of the three transverse moving roller groups are basically identical, especially the structures of the first transverse moving roller group 1100 and the third transverse moving roller group 1300 are completely identical. The aforementioned transverse rollers include the first transverse roller 1121 in the first transverse roller group 1100, the second transverse roller 1221 in the second transverse roller group 1200, and the third transverse roller in the third transverse roller group 1300.

[0047] The first transverse roller assembly 1100 includes a first support 1110 and a first connecting plate 1140. The middle part of the first connecting plate 1140 is hinged to the first support 1110. A first lifting swing frame is connected to one side of the first connecting plate 1140. The first lifting swing frame is connected to a power push rod that pushes it up and down. A first bracket 1123 is connected to the other side of the first connecting plate 1140. The first transverse roller 1121 for lifting the material pallet 2500 is set on the first bracket 1123. In this embodiment, two first transverse rollers 1121 are arranged in parallel on the first bracket 1123.

[0048] The first connecting plate 1140 has a first rotating support hole 1141 that is hinged to the first bracket 1110. A pin can be inserted into the hole to achieve the hinge connection with the first bracket 1110. It also has a first rotating connection hole 1142 that is rotatably connected to the first bracket 1123 and a first fixing hole 1143 that is fixedly connected to the first lifting swing frame. Pins can be inserted into these holes to achieve the connection.

[0049] In this embodiment, two sets of first connecting plates 1140 are symmetrically arranged on the left and right sides of the first bracket 1110, and two connecting plates in each set are symmetrically arranged on the front and rear sides of the first bracket 1110.

[0050] The first lifting swing frame includes two parallel first lifting swing arms 1132, which are connected by a first lifting connecting rod 1131. The two first lifting swing arms 1132 are respectively mounted on two first support shafts 1133, and the two ends of the first support shafts 1133 are respectively inserted into the first fixing holes 1143 of each set of connecting plates.

[0051] On both sides of the first bracket 1123, there are also first weighing devices 1122 for weighing. The two first weighing devices 1122 are arranged symmetrically, both of which are pin-type load cells. The two ends of the first weighing devices are respectively inserted into the first rotating connection holes 1142 of each set of first connecting plates 1140. When the roller moves upward and comes into contact with the material, the aforementioned weighing devices can monitor the weight of the material in real time. The weight can also be displayed in real time through an external display screen or alarm. When an abnormality is detected, an alarm signal can be issued in time.

[0052] In this embodiment, the first support shaft 1133 passes through the first fixing hole 1143 and is fixedly connected. The first weighing device 1122 passes through the first rotating connection hole 1142 and is rotatably connected. When the first support shaft 1133 is pushed to the left, the first connecting plate 1140 rotates clockwise around the first rotating hole 1141, causing the first weighing device 1122 and the first bracket 1123 to rotate downwards, and the first transverse roller 1121 moves downwards at the same time; the reverse is also true.

[0053] Similar to the structure of the first transverse roller group 1100, the second transverse roller group 1200 includes a second support 1210, which is hinged to a second connecting plate 1240. The second connecting plate 1240 is connected to a second bracket 1223 and a second lifting swing frame, respectively. Two second transverse rollers 1221 for lifting materials are provided on the second bracket 1223.

[0054] Two sets (two in each set) of second connecting plates 1240 are symmetrically arranged at both ends of the second bracket 1210, and a second lifting swing frame is provided between the two sets of second connecting plates 1240. The second lifting swing frame includes two parallel second support shafts 1233, which are respectively installed between the two sets of second connecting plates 1240. A second lifting swing rod 1232 is provided in the middle of each of the two second support shafts 1233, and the two second lifting swing rods 1232 are parallel to each other and connected by a second lifting connecting rod 1231.

[0055] The first lifting swing arm 1132 and the second lifting swing arm 1232 are respectively hinged to both ends of the sliding shoe lifting long tie rod 1400. The second lifting swing arm 1232 and the third lifting swing arm (a part in the third transverse roller group 1300, with the same structure as the first lifting swing arm 1132, not shown in the figure) are also connected through the sliding shoe lifting long tie rod 1400. In this embodiment, the second lifting swing arm 1232 is also connected to a power push rod 1500 that pushes it up and down. The power push rod 1500 is connected to the telescopic power unit. In this embodiment, the power push rod 1500 and the telescopic power unit are integrated into a hydraulic cylinder.

[0056] The power push rod 1500 controls the synchronous lifting and lowering of the first transverse roller 1121, the second transverse roller 1221, and the third transverse roller (not shown in the figure) through extension and retraction. The specific process is as follows: when the power push rod 1500 extends, the second lifting swing rod 1232 and the second lifting connecting rod 1231 in the second lifting swing frame rotate to the right synchronously, and drive the first lifting swing rod 1132 and the first lifting connecting rod 1131 in the first lifting swing frame to swing to the right through the sliding shoe lifting long pull rod 1400. The first support shaft 1133 and the first connecting plate 1140 rotate counterclockwise synchronously. During this process, the first bracket 1123, the second bracket 1223, and the third bracket move upward, so that the first transverse roller 1121, the second transverse roller 1221, and the third transverse roller move upward until they come into contact with the material. Then, under the support of the aforementioned transverse rollers, the material can be smoothly moved laterally by other power devices (i.e., the guide rail mentioned later). After being moved laterally to the designated position, the power push rod 1500 retracts, driving the first lateral movement roller 1121, the second lateral movement roller 1221, and the third lateral movement roller to move downwards synchronously until they are no longer in contact with the material. The power push rod 1500 can also be equipped with a hydraulic lock to ensure the stability and reliability of the lifting and lateral movement mechanism in lifting the material.

[0057] The second bracket 1223 is also equipped with a second weighing device 1222 for weighing. There are two second weighing devices 1222 symmetrically arranged, and they are pin-type weighing sensors. When the roller moves upward and comes into contact with the material, the aforementioned weighing device can monitor the weight of the material in real time. The weight can also be displayed in real time through an external display screen or alarm. When an abnormality is detected, an alarm signal can be issued in time.

[0058] The material pallet 2500 is provided with two guide blocks 2502. The transverse transmission device 1000 also includes a guide rail 2400 provided on the transmission frame 2600. The guide rail 2400 is located between the two guide blocks 2502 and the extension direction of the guide rail 2400 is consistent with the longitudinal transmission direction of the material pallet 2500. In this way, when the material pallet 2500 moves longitudinally, the guide rail 2400 can play a certain guiding role, so that it moves in a fixed direction and prevents it from tilting.

[0059] The guide rail 2400 is also connected to a lateral movement force unit that drives it to move laterally. When the guide rail 2400 moves laterally, it drives two guide blocks 2502 (which in turn drives the material pallet 2500) to move laterally.

[0060] The bottom of the guide block 2502 is provided with a first limiting part 2503. The outer edge of the first limiting part 2503 protrudes from the guide block 2502, which can prevent the guide rail 2400 from coming off.

[0061] In this embodiment, the transmission frame 2600 is installed on the main vehicle body. When the main vehicle body is aligned with the transport machine track, the material pallet 2500 is first moved laterally by the guide rail 2400. After confirming that the guide rail 2400 is aligned with the transport machine track, the material pallet 2500 and the materials 2501 placed on it are then transported longitudinally by the longitudinal transmission device 2000.

[0062] A guide rail bracket 2430 is provided on the transmission frame 2600, and a guide rod (not shown, obscured by the guide groove 2403) is provided on the guide rail 2400. The guide groove 2403 is provided on the guide rail 2400 to accommodate the guide rod. With the provision of the guide rod and the guide groove 2403, the guide rail 2400 can only move in the specified direction when moving laterally, preventing it from tilting.

[0063] A second limiting part 2431 is provided at the end of the guide rod to prevent it from dislodging from the guide groove 2403. The guide rail 2400 also has a guide wide groove 2404 at the guide groove 2403, and the second limiting part 2431 is located in the guide wide groove 2404. In this embodiment, the guide wide groove 2404 and the guide groove 2403 are sequentially formed on the guide rail 2400 from top to bottom. The second limiting part 2431 is a nut screwed to the end of the guide rod, which can prevent the guide rail 2400 from jumping upward (at the same time, the guide rail bracket 2430 can also prevent the guide rail 2400 from jumping downward), ensuring the stability of the guide rail 2400. The second limiting part 2431 is located in the guide wide groove 2404, and its upper surface is not higher than the upper surface of the guide rail 2400, ensuring that the outer edge of the guide rail 2400 is smooth and without protrusions.

[0064] A weight reduction hole 2402 is provided on the guide rail 2400.

[0065] In this embodiment, the lateral movement force is a telescopic cylinder 2412, and the telescopic end of the telescopic cylinder 2412 is connected to the guide rail 2400. When the telescopic cylinder 2412 extends / retracts, it drives the guide rail 2400 to move forward / backward laterally, thereby driving the guide block, the loading tray 2500, and the material 2501 to move back and forth laterally.

[0066] The transmission frame 2600 is provided with a telescopic guide part 2410, which has a telescopic guide groove 2411 for accommodating the telescopic cylinder 2412. A third limiting part 2415 is provided on the telescopic guide groove 2411. The third limiting part 2415 can prevent the telescopic cylinder 2412 from accidentally dislodging. At the same time, there are two third limiting parts 2415, located on both sides of the guide rail 2400, which can also limit the lateral movement of the guide rail 2400.

[0067] An adapter housing 2413, which mates with the telescopic guide groove 2411, is fitted onto the outside of the telescopic cylinder 2412. The telescopic guide groove 2411 is a square sliding groove, and the adapter housing 2413 is also square. The telescopic cylinder 2412 and the adapter housing 2413 are connected by a locking pin 2414. The adapter housing 2413 is connected to the guide rail 2400 via a guide rail connecting part 2420.

[0068] In this embodiment, the longitudinal movement of the pallet 2500 and the material 2501 is guided by the guide rail 2400. At the same time, the guide rail 2400 is also connected to the telescopic cylinder 2412. When transfer and docking are required, the pallet 2500 and the material 2501 can be adjusted by short-distance lateral movement to improve their docking accuracy.

[0069] The conveying mechanism disclosed in this embodiment, when the material pallet 2500 needs to be moved laterally for alignment, drives the pallet 2500 to move laterally as a whole through the lateral movement of the guide rail 2400. After alignment, the guide rail 2400 guides the longitudinal transmission process of the material pallet 2500, ensuring that it moves along the designated route, thus ensuring the reliability and stability of the material transmission process. It has the advantages of simple structure and convenient operation. At the same time, the guide rail bracket can also limit and guide the lateral movement of the guide rail, ensuring that the material pallet moves laterally along the designated path and improving the lateral movement accuracy.

[0070] This mechanism makes the transport process of the material pallet 2500 more stable and controllable, while also facilitating alignment and transfer, thus improving transport efficiency and accuracy. Through the aforementioned structural arrangement, the material pallet 2500 can move independently longitudinally and laterally relative to the transport frame 2600, improving the accuracy of alignment and adaptation.

[0071] like Figure 34 — Figure 41 As shown, the lifting scissor brace 5000 includes an outer support 5100. An inner support 5200 is hinged to the inner wall of the outer support 5100 via a first pin 5300. A horizontal rolling cylinder 5400 connecting to the transmission frame 2600 is installed at the upper end of the outer support 5100. A first roller mechanism 5500 connecting to the traveling chassis 3000 is installed at the lower end of the outer support 5100. A second roller mechanism 5700 connecting to the transmission frame 2600 is installed at the upper end of the inner support 5200. The lower end of the inner support 5200 is hinged to the traveling chassis 3000 via a third pin 5800. The outer support 5100 is... The H-shaped frame structure composed of box beams includes two symmetrically arranged variable cross-section broken line external shear beams 5110. Each of the two external shear beams 5110 is equipped with a roll cylinder 5400. One of the two roll cylinders 5400 rises while the other falls to adjust the left and right tilt angle of the transmission frame 2600. The inner support 5200 is equipped with a pitch cylinder 5010 to adjust the front and rear tilt angle of the transmission frame 2600. The outer support 5100 and the traveling chassis 3000 are connected by a main lifting cylinder 5900 to adjust the height of the transmission frame 2600.

[0072] A first crossbeam 5120 is provided between the two outer shear support beams 5110 to connect them as one unit. The first crossbeam 5120 is provided with a lug 5130. The upper end of the main lifting cylinder 5900 is provided with a main lifting cylinder upper end pin 5930 connected to the lug 5130. The lower end of the main lifting cylinder 5900 is provided with a main lifting cylinder upper end pin 5920 connected to the traveling chassis 3000. A U-shaped groove 5150 is provided at the upper end of the outer shear support beam 5110. The side wall of the roll cylinder 5400 is provided with a protrusion 5430 that can extend into the U-shaped groove 5150. The roll cylinder 5400 is also provided with a roll cylinder pin 5420 connected to the transmission frame 2600. When the roll cylinder 5400 extends or retracts, it can drive the transmission frame 2600 connected to it to move up and down, so as to realize the angle adjustment of the transmission frame. A first roller mechanism connection hole 5180 for connecting the first roller mechanism 5500 is provided at the lower end of the outer shear beam 5110.

[0073] A first pin outer hole 5140 is provided in the middle of the outer shear beam 5110, through which the first pin 5300 passes. A copper sleeve is installed in the first pin outer hole 5140 to make the rotation of the first pin 5300 smoother and extend the service life of the equipment.

[0074] The internal bracing 5200 includes two parallel internal shear bracing beams, each comprising a lower internal shear bracing section 5210 and an upper internal shear bracing section 5220 hinged together. The lower and upper internal shear bracing sections 5210 and 5220 are connected by a second pin 5230. A second crossbeam 5212 is provided between the two lower internal shear bracing sections 5210 to connect them as a whole, forming an H-shaped frame structure composed of box beams.

[0075] The lower section 5210 of the inner shear support is composed of a variable cross-section, polygonal inner shear support beam 5211 with a crank arm 5214 at one end. The lower section beam 5211 has a first pin inner hole 5213 for mounting a first pin 5300, and a copper sleeve is installed inside the first pin inner hole 5213. The lower end of the lower section beam 5211 has a third pin hole 5217, through which a third pin 5800 passes. The upper end of the lower section beam 5211 has a second pin outer hole 5215 through which a second pin 5230 passes. The crank arm 5214 has a first mounting hole 5216 for the pitch cylinder, connecting to the lower end of the pitch cylinder 5010.

[0076] A connecting beam 5222 is provided between the two upper sections of the inner shear brace 5220 to form an H-shaped frame structure composed of box beams. The upper section of the inner shear brace 5220 includes a variable cross-section polygonal inner shear brace upper section beam 5221. The lower end of the upper section beam 5221 has a second pin hole 5223 through which the second pin 5230 passes. The middle part of the upper section beam 5221 has a second mounting hole 5224 for the pitch cylinder 5010, which connects to the upper end of the pitch cylinder 5010. The upper end of the upper section beam 5221 has a second roller mechanism connecting hole 5225 for the second roller mechanism 5700.

[0077] The structure of the pitch cylinder 5010 is the same as that of the main lifting cylinder 5900, and their installation relationship will not be described in detail here. By extending and retracting the pitch cylinder 5010, the height of the inner support 5200 can be adjusted, thereby adjusting the height of the transmission frame 2600 (the connection between the transmission frame 2600 and the inner support 5200). (If the height of the connection between the transmission frame 2600 and the outer support 5100 remains unchanged at this time, the extension and retraction of the pitch cylinder 5010 can adjust the forward and backward tilt angle of the transmission frame 2600).

[0078] In this embodiment, the first roller mechanism 5500 and the second roller mechanism 5700 have the same structure, and their main body is a rolling wheel. With this arrangement, when the outer support 5100 and the inner support 5200 rotate, the end of the roller that is installed on them will roll, making their rotation process smoother and more stable.

[0079] To prevent accidents during use, the device is also equipped with a mechanical movement limiting device 5600. The mechanical movement limiting device 5600 is installed on the traveling chassis 3000, and its installation position is specified according to the equipment stroke. It is used to limit the outward movement limit of the first roller mechanism 5500 to prevent it from exceeding the maximum outward movement stroke (in case of accidents such as: the main lifting cylinder 5900 fails unexpectedly, the material pallet and the transmission frame 2600 press down on the lifting shear support 5000 under their own weight, causing the outer support 5100 and the inner support 5200 to rotate, and the first roller mechanism 5500 to move outward. During this process, the mechanical movement limiting device 5600 limits the limit position of the first roller mechanism 5500 to avoid accidents).

[0080] The horizontal rolling cylinder 5400, the vertical tilt cylinder 5010, and the main lifting cylinder 5900 installed on the lifting shear strut 5000 can adjust the left and right tilt angle, the front and back tilt angle, and the height of the transmission frame 2600 (and the material pallet 2500), so as to facilitate docking with docking equipment and realize the transfer of materials.

[0081] Meanwhile, this application also includes an auxiliary lifting cylinder on the chassis 3000. This auxiliary cylinder mainly assists in lifting the transmission frame 2600 within a certain range. Compared with lifting directly via the main lifting cylinder 5900, the addition of the auxiliary lifting cylinder significantly improves the mechanical balance and motion synchronization accuracy during the lifting process, effectively avoiding platform tilting, slippage, or structural stress concentration caused by unilateral load. Lifting is smoother during operation, reducing the load required by the shear support lifting cylinder and helping to reduce the overall volume. Furthermore, the auxiliary lifting cylinder's side-welded mounting base is directly connected to the chassis 3000, achieving rigid, low-redundancy modular integration. This enhances the overall structural torsional stiffness and load-bearing reliability while simplifying the assembly process. The movable end is precisely supported at the corresponding positions at the front and rear ends of the upper platform's bottom, allowing the lifting reaction force to be directly transmitted to the main load-bearing area, significantly reducing the risk of local deformation and extending the platform's service life.

[0082] In this embodiment, the basic module of the loading and unloading platform control system is the main control unit, which is the nerve center of the entire control system. It mainly consists of multiple controllers, multiple sensors, and communication modules. The sensors provide feedback signals, the controllers receive the feedback signals and send control commands, and the communication module communicates with the auxiliary controllers and remote controllers.

[0083] The main control unit receives sensor signals from each execution unit to determine the working status of each execution unit; it compares the operation commands (such as walking, turning, lifting, transmission, etc.) from the remote control or the control unit itself, and outputs control commands; each execution unit executes the control commands to perform the operation.

[0084] The main control unit is encapsulated in a separate enclosure and installed on the loading and unloading platform; the local control unit is installed in the driver's cab of the loading and unloading platform; the local control unit controls the loading and unloading platform to perform operations through the main control unit.

[0085] In this embodiment, a combination switch, pedals, and steering wheel, along with other real vehicle control components, are installed inside the cab 6000. Dampers are added to simulate pedal and steering wheel torque, realistically replicating the effects of a real vehicle. Sensors convert the operating signals from the pedals and steering wheel into electrical signals, which are then transmitted to the auxiliary controller. A comprehensive management system is located in front of the cab, equipped with operating buttons and switches for platform lifting, attitude adjustment, and material transfer mechanisms. The signals from these buttons and switches are integrated and managed by the auxiliary controller. A display screen on the comprehensive management system receives status signals from the auxiliary controller, showing not only the actual driving and operating status of the loading platform but also the front, rear, left, and right sides of the platform, displaying the platform's working status in real time. The auxiliary controller manages various driving and operating commands, communicates with the main control unit via CAN, transmits control instructions, and achieves local control and status feedback (the display screen shows the operating status, platform faults, etc.) of the loading platform.

[0086] In this embodiment, the remote control unit mainly consists of a remote control transmitter and a remote control receiver, with the receiver mounted on the main control unit. A portable remote control transmitter is selected, equipped with various operation keys and buttons covering the operations required for daily driving. The remote control unit communicates with the main control unit via CAN to transmit control commands, enabling local control and status feedback of the loading and unloading platform (displaying operating status, platform faults, etc.).

[0087] The above embodiments are not intended to limit the shape, material, structure, etc. of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

[0088] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0089] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A loading and unloading platform, comprising a chassis, a transfer frame for placing material pallets, and a lifting scissor brace located between the chassis and the transfer frame, characterized in that, The chassis includes a frame, one end of which is provided with a first wheel set, the first wheel set having a first rocker arm hinged to the frame, and the other end of which is provided with a second wheel set, the second wheel set having a second rocker arm hinged to the frame. The first wheel set has two rows of first travel wheels, and the second wheel set has two rows of second travel wheels. A first telescopic rod is provided between the frame and the first rocker arm, and a second telescopic rod is provided between the frame and the second rocker arm. The first and second travel wheels rotate to drive the frame to move horizontally, and the first and second telescopic rods extend and retract to drive the frame to rise and fall vertically. The transmission frame is equipped with a longitudinal transmission device for longitudinally transporting material pallets and a transverse transmission device for transversely transporting material pallets. The longitudinal transmission device has a longitudinal moving roller that contacts the bottom of the material pallet, and the transverse transmission device has a transverse moving roller that contacts the bottom of the material pallet. The transverse moving roller is connected to a power push rod that drives its lifting and lowering. The lowest descending height of the transverse moving roller is lower than the height of the longitudinal moving roller, and the highest ascending height of the transverse moving roller is higher than the height of the longitudinal moving roller. The lifting scissor brace includes an outer support, with an inner support hinged to the inner wall of the outer support. The upper end of the outer support is equipped with a horizontal rolling cylinder that connects to the transmission frame, and the lower end of the outer support is equipped with a first roller mechanism that connects to the traveling chassis. The upper end of the inner support is equipped with a second roller mechanism that connects to the transmission frame, and the lower end of the inner support is hinged to the traveling chassis. A main lifting cylinder that adjusts the height of the transmission frame is provided between the outer support and the traveling chassis.

2. The loading and unloading platform according to claim 1, characterized in that, The first wheel set also includes a first crossbeam, the first rocker arm is mounted on the first crossbeam, the two ends of the first crossbeam are respectively provided with first balance beams, the two rows of first travel wheels are respectively mounted on the two first balance beams, and the two ends of the first telescopic rod are respectively hinged to the frame and the first rocker arm. The second wheel set also includes a second crossbeam, with a crossbeam hole in the middle of the second crossbeam. The second rocker arm is provided with a rocker arm shaft that is rotatably connected to the crossbeam hole. The two ends of the second crossbeam are respectively provided with second balance beams. The two rows of second travel wheels are respectively installed on the two second balance beams. The two ends of the second telescopic rod are respectively hinged to the frame and the second rocker arm.

3. The loading and unloading platform according to claim 2, characterized in that, Both the first rocker arm and the second rocker arm have rocker arm holes. The frame is provided with a frame shaft that is rotatably connected to the rocker arm holes. The first balance beam has a balance beam hole in the middle. Both ends of the first crossbeam are provided with crossbeam shafts that are rotatably connected to the balance beam holes. The first traveling wheel is mounted on a wheel shell. The wheel shell is rotatably connected to the first balance beam. The first balance beam is provided with a third telescopic rod that can drive the wheel shell to rotate around the first balance beam.

4. A loading and unloading platform according to claim 3, characterized in that, The first balance beam is provided with a telescopic rod support, one end of the third telescopic rod is hinged to the telescopic rod support, and the other end of the third telescopic rod is hinged to the telescopic rod connecting part. The wheel housing is provided with a wheel housing hole, and the telescopic rod connecting part is provided with a connecting shaft that is rotatably connected to the wheel housing hole.

5. A loading and unloading platform according to claim 1, characterized in that, The longitudinal transmission device includes two rows of parallel and identical active longitudinal transfer units. Each row of active longitudinal transfer units is equipped with a longitudinal movement force unit. The longitudinal transfer rollers include two rows of active longitudinal transfer rollers that are driven individually by the two rows of longitudinal movement force units. A parallel shaft assembly is provided between the two rows of active longitudinal transfer rollers. At least one driven longitudinal transfer unit is also provided between the two rows of active longitudinal transfer units.

6. A loading and unloading platform according to claim 5, characterized in that, The transverse conveying device includes at least one row of transverse units, each row of transverse units has the same structure, and each row of transverse units includes one or more transverse roller groups connected to each other. The transverse roller group includes a support and a connecting plate. The middle part of the connecting plate is hinged to the support. One side of the connecting plate is connected to a lifting swing frame. The lifting swing frame is connected to a power push rod that pushes it up and down. The other side of the connecting plate is connected to a bracket. The transverse roller is set on the bracket. The power push rod moves left and right to drive the lifting swing frame to swing left and right, which in turn drives the connecting plate to swing left and right, and finally drives the bracket and the transverse roller to swing right and left, thereby realizing the raising and lowering of the transverse roller.

7. A loading and unloading platform according to claim 6, characterized in that, The lifting swing frame includes two parallel lifting swing rods, which are connected by a lifting connecting rod. Multiple transverse roller groups are connected in sequence by a sliding shoe lifting long tie rod. The two ends of the sliding shoe lifting long tie rod are respectively hinged to the lifting swing rods in two adjacent transverse roller groups. One of the transverse roller groups has a power push rod connected to a telescopic power unit, which extends and retracts to move the power push rod left and right.

8. A loading and unloading platform according to claim 7, characterized in that, The material pallet is provided with two guide blocks. The transverse transmission device also includes a guide rail set on the transmission frame. The guide rail is located between the two guide blocks and the extension direction of the guide rail is consistent with the longitudinal transmission direction of the material pallet. The guide rail is also connected to a transverse movement force unit that drives it to move laterally. When the guide rail moves laterally, it drives the material pallet to move laterally.

9. A loading and unloading platform according to claim 1, characterized in that, The external support includes two symmetrically arranged external shear support beams. Each of the two external shear support beams is equipped with a horizontal rolling cylinder at its end. One of the two horizontal rolling cylinders rises while the other falls to adjust the left and right tilt angle of the transmission frame. A first crossbeam is provided between the two external shear support beams to connect them as one unit. The first crossbeam is provided with an ear seat for connecting the main lifting cylinder. The upper end of the external shear support beam is provided with a U-shaped groove for connecting the horizontal rolling cylinder. The side wall of the rolling cylinder is provided with a protrusion that can extend into a U-shaped groove, and the rolling cylinder is also provided with a rolling cylinder pin that connects to the transmission frame.

10. A loading and unloading platform according to claim 9, characterized in that, The inner support is equipped with a pitch cylinder for adjusting the forward and backward tilt angle of the transmission frame. The inner support includes two parallel inner shear support beams. The inner shear support beam includes a lower inner shear support section and an upper inner shear support section that are hinged to each other. A second crossbeam is provided between the two lower inner shear support sections to connect them as one unit. A connecting beam is provided between the two upper inner shear support sections to connect them as one unit. The lower section of the inner shear support includes a lower beam, and a crank arm is provided at the upper end of the lower beam. The crank arm is provided with a first mounting hole for the pitch cylinder that connects to one end of the pitch cylinder. The upper section of the inner shear support includes an upper beam, and a second mounting hole for the pitch cylinder that connects to the other end of the pitch cylinder is provided on the upper beam.

Images