A carrying platform

Abstract

The present invention discloses a carrying platform, which relates to the technical field of vehicle technology. The present invention includes a frame assembly, a skin is welded and fixed to the outside of the top of the frame assembly, sliding grooves are formed on both sides of the top of the skin, an inclined surface is formed at one end of the sliding groove, a hook is fixed to the top of the inclined surface, and a support plate is bolted and fixed to the top of the skin and at the top end of the sliding groove. One end of the support plate is rotatably connected to an extended pedal. By adopting a sliding and retractable pedal for the carrying platform, while meeting the maximum climbing performance of the unmanned vehicle carried, the linkage structure enables the pedal to be retracted and extended conveniently and quickly, saving labor costs and reducing labor intensity. When not in use, the pedal is hidden in the sliding groove inside the platform, saving the space for placing the pedal and not affecting the vehicle's shape, passability, and transportability; the supporting locking mechanism enables the pedal not to swing during the driving of the vehicle carrying, making it safer and more reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and particularly relates to a carrying platform. Background Art

[0002] With the development of technology, light unmanned vehicles are increasingly widely used in military operations. However, at present, light unmanned vehicles still have problems such as short endurance mileage, slow driving speed, and low long-distance mobility. During actual use, conventional high-mobility tactical vehicles are still required to provide transportation and support for them.

[0003] Compared with the transportation, retraction and deployment of general equipment, the carrying platform for unmanned vehicles should meet the following requirements: the carrying platform should be able to bear the weight of the unmanned vehicle and have the functions of tethering and limiting; the carrying platform should be equipped with a retractable boarding pedal, and after the pedal is deployed, it should be able to provide sufficient adhesion coefficient, and the deployment angle should meet the maximum climbing performance requirements of the unmanned vehicle; the carrying platform should not affect the combat and technical indicators such as the shape, passability, and transportability of the carrier vehicle; the boarding pedal should have a fast retraction and deployment function, and should have a locking function after retraction.

[0004] At present, there are already many publicly disclosed technical solutions for the structure of carrying platforms. For example, the utility model patent with the authorization announcement number CN205737160U, a rear-pull platform of a car carrier, includes a car carrier longitudinal beam, a pull-out platform, a driving mechanism, a transmission wheel, a clamping plate, and a transmission device. A chute is provided in the car carrier longitudinal beam, the pull-out platform is clamped in the chute, and the pull-out platform can longitudinally displace in the chute. The driving mechanism is provided on a cross beam connected to the car carrier longitudinal beam. The driving mechanism is provided with a roller. The transmission wheel is provided on a cross beam connected to the car carrier longitudinal beam and at the tail end. A transmission device is provided between the driving mechanism and the transmission wheel. The transmission device is provided between the transmission wheel and the driving mechanism and bypasses the rollers of the transmission wheel and the driving mechanism. The clamping plate is installed on the cross beam at the front end of the pull-out platform. The clamping plate fixedly clamps a section of the transmission device and moves with the rotation of the transmission device, solving the technical problem that at the present stage, when loading cars on a car carrier, since the length of the car carrier cannot be well matched with the length of the car, the loading capacity of the car cannot reach an optimal level. Currently, a movable pull-out platform is generally provided at the tail end of the loading platform to make up for the shortcoming that the length of the car carrier cannot change with the actual situation. However, the pull-out platforms of many current car carriers are still manually operated, which is time-consuming and laborious. This utility model is designed with a separate driving element to extend the pull-out platform. This technical solution can only provide a movable pull-out platform to make up for the length of the car carrier, cannot meet the function of loading and unloading cars, and affects the departure angle of the carrier vehicle;

[0005] The utility model patent with the authorization announcement number CN211494507U, a multifunctional UAV carrier platform, includes a base, one side of the base is symmetrically fixed with a groove; both sides of the inner cavity of the groove are symmetrically fixed with a slide rail, the inner cavity of the slide rail is slidably sleeved with a slide rod, the surface of the slide rod is fixedly sleeved with a rotating bearing, the surface of the rotating bearing is fixedly connected with a pad, the top of the base is symmetrically fixed with a track, the inner cavity of the track is symmetrically fixed with three slide grooves, the inner cavity of the slide groove is slidably sleeved with a plug plate, and the surface of the plug plate is fixedly connected with a handle, which solves the current UAV carrier platform in the process of transportation, there are only simple fixing devices, and when carrying, it needs to be carried by machine or manual, which is a more troublesome technical problem. The utility model is designed with a separate drive element to extend the pad for the landing and recovery of the UAV. The technical solution requires a space for placing the drive mechanism in the vehicle, and the carrier platform needs to be moved by manpower dragging the handrail. According to the currently disclosed technical solution, the driving wheels are directly fixed on both sides of the carrier platform, the chassis is close to the ground, and the passability is poor. Summary of the invention

[0006] The purpose of the present invention is to provide a carrier platform to solve the technical problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention is a transport platform, comprising a skeleton assembly, a skin is welded and fixed on the outer side of the top of the skeleton assembly, slide grooves are provided on both sides of the top of the skin, an inclined surface is provided at one end of the slide groove, a hook is fixed on the top of the inclined surface, a support plate is bolted to the top of the skin and located at the top end of the slide groove, and an extension pedal is rotatably connected to one end of the support plate.

[0009] Furthermore, the skeleton assembly is composed of a crossbeam, a longitudinal beam, a connecting plate and a connecting bracket. The crossbeam and the longitudinal beam are welded and fixed in an alternating manner. Connecting plates are fixed at both ends of the longitudinal beam, and connecting brackets are fixed on the connecting brackets.

[0010] Furthermore, an anti-slip member is fixed to the top of the support plate.

[0011] Furthermore, a limiting mechanism is installed on the support plate, and the limiting mechanism includes a fixing ring and a limiter. The outer side of the support plate is evenly equipped with fixing rings, and limiters are installed at both ends of the support plate.

[0012] Furthermore, the limiter includes a support seat, a limit rod and a spring pin. Support seats are fixed on both sides of the two ends of the support plate. The top ends of the two support seats at the same end are internally slidably connected with the limit rod. A pin hole is opened inside one side of the limit rod, and a spring pin is installed inside the pin hole.

[0013] Further, a pedal mechanism facilitating getting on the vehicle is installed on the skin. The pedal mechanism includes a main pedal and an extension pedal. The main pedal is slidably connected to the inside of the chute and at the bottom end of the support plate. One end of the main pedal is equipped with a pin shaft, and a roller is rotatably connected to the outside of the pin shaft.

[0014] Further, a driving linkage device for driving the extension pedal is installed on the top of the skin.

[0015] Further, a locking mechanism for positioning is installed on the top of the skin. The locking mechanism includes a locking pin, a spring, and a pin seat. The bottom end of the pin seat is fixedly bolted to the skin. The locking pin is slidably connected to the inside of the pin seat, and the locking pin is slidably connected to the main pedal. A spring is sleeved on the outside of the locking pin and inside the pin seat.

[0016] Further, a positioning mechanism for limiting the position of the main pedal is installed at one end of the top of the skin. The positioning mechanism includes a protective housing, an angular rotation shaft, and a positioning card plate. The angular rotation shaft is rotatably connected to the inside of the protective housing, and positioning card plates are fixed to both ends of the angular rotation shaft.

[0017] Further, a transmission mechanism for driving the angular rotation shaft to rotate is installed inside the protective housing. The transmission mechanism includes a limiting rotation column, a first transmission gear, a second transmission gear, a lifting rack, an angular adjustment driving motor, a transmission worm, a transmission worm gear, a limiting rotation shaft, a height adjustment thread section, and a height adjustment displacement plate. The angular adjustment driving motor is fixed to the protective housing. The output end of the angular adjustment driving motor is connected to the transmission worm. The transmission worm is meshed with a transmission worm gear on one side. The transmission worm gear is internally fixed with a limiting rotation shaft, and the limiting rotation shaft is rotatably connected to the protective housing;

[0018] A height adjustment thread section is provided on the outside of the limiting rotation shaft. A height adjustment displacement plate is threadedly connected to the outside of the height adjustment thread section. One end of the height adjustment displacement plate is fixed with a lifting rack. A height adjustment sliding block is fixed to the end of the lifting rack away from the height adjustment displacement plate. A limiting plate is slidably connected to the outside of the end of the height adjustment sliding block away from the lifting rack, and the limiting plate is fixed to the protective housing. The lifting rack is meshed with a first transmission gear on one side. The first transmission gear is internally fixed with a limiting rotation column, and the limiting rotation column is rotatably connected to the protective housing. The first transmission gear is meshed with a second transmission gear at the top, and the second transmission gear is fixed to the outside of the angular rotation shaft.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention uses a sliding and retractable pedal for the carrying platform. While meeting the maximum climbing performance of the unmanned vehicle to be carried, the linkage structure enables the pedal to be retracted and deployed conveniently and quickly, saving labor costs and reducing labor intensity. When not in use, the pedal is hidden in the internal chute of the platform, saving the space for pedal placement and not affecting the vehicle's shape, passability, and transportability. The provided limit mechanism meets the limiting requirements of the unmanned vehicle. The supporting locking mechanism ensures that the pedal does not swing during the vehicle's travel, making it safer and more reliable.

[0021] 2. Through the cooperation of the limit mechanism, pedal mechanism, and locking mechanism, the present invention realizes functions such as the loading, fixing, and quick getting on and off of the unmanned vehicle, with a high degree of integration.

[0022] 3. The pedal of the present invention adopts a sliding retractable type. After retraction, it does not affect the vehicle's height and departure angle, and does not reduce the off-road performance and transport performance. The pedal is retracted and deployed quickly, conveniently, and reliably. The linkage pedal extends the boarding distance of the unmanned vehicle, reduces the climbing gradient, and lightens the pedal weight.

[0023] 4. The locking mechanism of the present invention has a simple structure and reliable operation, improving the safety when the pedal is retracted.

[0024] 5. Through the cooperation of the transmission mechanism, protective housing, angle rotation shaft, and positioning card plate, the present invention can drive the angle rotation shaft to rotate through the transmission mechanism during use, and then drive the positioning card plate to position the main pedal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is the effect diagram of the carrying platform of the present invention;

[0027] Figure 2 It is the schematic diagram of the platform body of the present invention;

[0028] Figure 3 It is the schematic diagram of the limit mechanism of the present invention;

[0029] Figure 4 It is the schematic diagram of the pedal mechanism retracted of the present invention;

[0030] Figure 5 It is the schematic diagram of the pedal mechanism deployed of the present invention;

[0031] Figure 6Schematic diagram of the relative positions of the roller, pin shaft, chute and hook of the present invention;

[0032] Figure 7 Schematic diagram of the locking mechanism of the present invention;

[0033] Figure 8 Schematic diagram of the structure of the positioning mechanism of the present invention;

[0034] Figure 9 Schematic diagram of the internal structure of the protective housing of the present invention;

[0035] Figure 10 Schematic diagram of the structure of the limiting plate of the present invention;

[0036] Figure 11 Schematic diagram of the connection structure between the lifting rack and the height adjustment displacement plate of the present invention.

[0037] In the drawings, the list of components represented by each reference numeral is as follows:

[0038] 1. Skeleton assembly; 2. Skin; 3. Chute; 4. Hook; 5. Support plate; 6. Fixed ring; 7. Support seat; 8. Limit rod; 9. Spring pin; 10. Main pedal; 11. Roller; 12. Pin shaft; 13. Linkage device; 14. Extension pedal; 15. Lock pin; 16. Spring; 17. Pin seat; 18. Protective housing; 19. Positioning support plate; 20. Angle rotation shaft; 21. Positioning clamping plate; 22. Limit rotation column; 23. First transmission gear; 24. Second transmission gear; 25. Lifting rack; 26. Angle adjustment drive motor; 27. Transmission worm; 28. Transmission worm gear; 29. Limit rotation shaft; 30. Height adjustment thread section; 31. Height adjustment displacement plate; 32. Height adjustment sliding block; 33. Limiting plate. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment 1:

[0041] Please refer to Figures 1 - 5As shown in the figure, the present invention is a carrying platform, which includes a frame assembly 1. The frame assembly 1 is composed of cross beams, longitudinal beams, connecting plates and connecting brackets. The cross beams and longitudinal beams are fixedly welded in a staggered manner, so that the longitudinal beams and cross beams are fixed perpendicular to each other at 90 degrees. Connecting plates are fixed at both ends of the longitudinal beams, and a connecting bracket is fixed on the connecting bracket. The connecting bracket is bolted to the carrier vehicle frame. A skin 2 is fixedly welded on the outside of the top of the frame assembly 1. Chutes 3 are opened on both sides of the top of the skin 2. One end of the chute 3 is provided with an inclined surface, and the other end of the chute 3 is closed. A hook 4 is fixed at the top of the inclined surface;

[0042] A support plate 5 is bolted to the top of the skin 2 and at the top end of the chute 3. An anti-slip member is fixed on the top of the support plate 5, and the material of the anti-slip member is rubber. The support plate 5 is bolted to the frame assembly 1, so that the frame assembly 1, the skin 2 and the support plate 5 can be bolted together. One end of the support plate 5 is rotatably connected with an extension pedal 14;

[0043] A limiting mechanism is installed on the support plate 5. The limiting mechanism includes fixing rings 6 and limiters. Fixing rings 6 are evenly assembled on the outside of the support plate 5, so that the fixing rings 6 are longitudinally distributed on the outside of the support plate 5 along the platform body and are connected to the mounting holes of the frame cross beam.

[0044] Limiters are installed at both ends of the support plate 5;

[0045] The limiter includes a support seat 7, a limiting rod 8 and a spring pin 9. Support seats 7 are fixed on both sides of both ends of the support plate 5. The support seats 7 are connected with the support plate 5, the skin 2 and the frame cross beam through common holes. A limiting rod 8 is slidably connected inside the tops of two support seats 7 at the same end. When the unmanned vehicle is fixed, the limiting rod 8 passes through the mounting hole on the support seat 7 to block the wheel and prevent the wheel from moving backward, avoiding the front and back shaking of the unmanned vehicle when the carrier vehicle accelerates or brakes;

[0046] Preferably, in this embodiment, the inside of the limiting rod 8 is hollow, and a fixing rope or a fixing rod with a certain diameter can pass through the inside of the limiting rod 8, and they are tied to the wheel for positioning;

[0047] A pin hole is opened inside one side of the limiting rod 8, and a spring pin 9 is installed inside the pin hole to prevent the limiting rod 8 from slipping out of the mounting hole of the support seat 7 when the carrier vehicle turns; the limiting rod 8 passes through the hole at the upper part of the support seat 7, and a quick-release spring pin 9 is installed at the end of the limiting rod 8 for locking;

[0048] A pedal mechanism facilitating getting on the vehicle is installed on the skin 2. The pedal mechanism includes a main pedal 10 and an extension pedal 14. The main pedal 10 is slidably connected inside the chute 3 and at the bottom end of the support plate 5, so that the main pedal 10 can be manually pulled to slide in a pull-out manner inside the chute 3. One end of the main pedal 10 is equipped with a pin shaft 12, and the pin shaft 12 is located at one end of the main pedal 10 inside the chute 3 away from the inclined surface, so that the pin shaft 12 can be fixed inside the main pedal 10 by interference fit. A roller 11 is rotatably connected to the outside of the pin shaft 12, so that the roller 11 can rotate on the outside of the pin shaft 12. When unfolded, the main pedal 10 slides onto the inclined surface, the pin shaft 12 is connected to the hook 4, and the tail end of the main pedal 10 is lowered to the ground.

[0049] A drive linkage device 13 for driving the extension pedal 14 is installed on the top of the skin 2, so that the extension pedal 14 connected to the rear end of the support plate 5 can be manipulated to turn down synchronously through the drive linkage device 13 to cover the chute 3. At this time, the linkage device 13 is in a free state, and the extension pedal 14 turns up and is flush with the support plate 5. When the main pedal 10 is unfolded, when the roller 11 slides to the tail of the chute 3 and the pin shaft 12 is connected to the hook 4, during the process of the main pedal 10 being lowered to the ground, the main pedal 10 presses down the linkage device 13, driving the extension pedal 14 to turn down and fit with the skin 2. At this time, the extension pedal 14 is flush with the main pedal 10, extending the effective length of the boarding ramp, reducing the climbing gradient, and reducing the weight.

[0050] A specific application of this embodiment is as follows: The cross beam, longitudinal beam, connecting plate and connecting bracket are welded to form a frame assembly 1, and then the skin 2 is welded to the outside of the top of the frame assembly 1. The support plate 5 is bolted to the frame assembly 1 so that the frame assembly 1, the skin 2 and the support plate 5 can be bolted together. The fixing rings 6 are longitudinally distributed on the outside of the support plate 5 along the platform body and are connected to the mounting holes of the frame cross beam. Then the support seat 7 is connected with the support plate 5, the skin 2 and the frame cross beam through the same hole. When the unmanned vehicle is fixed, the limiting rod 8 passes through the mounting hole on the support seat 7 to prevent the unmanned vehicle from shaking back and forth when the vehicle accelerates or brakes. Then when the vehicle turns, the limiting rod 8 disengages from the mounting hole of the support seat 7; the limiting rod 8 passes through the hole in the upper part of the support seat 7, and a quick-release spring pin 9 is installed at the end of the limiting rod 8 for locking. Thus, the main pedal 10 can be manually pulled to slide in a drawable manner inside the chute 3, and the pin shaft 12 is located at one end of the inside of the chute 3 on the main pedal 10 away from the inclined surface. Thus, the pin shaft 12 can be fixed inside the main pedal 10 by interference fit, enabling the roller 11 to rotate outside the pin shaft 12. When unfolded, the main pedal 10 slides onto the inclined surface, the pin shaft 12 is connected to the hook 4, and the tail end of the main pedal 10 is lowered to the ground; thus, the extension pedal 14 connected to the rear end of the support plate 5 can be synchronously turned down by driving the linkage device 13 to cover the chute 3. At this time, the linkage device 13 is in a free state, and the extension pedal 14 is turned up to be flush with the support plate 5. When the main pedal 10 is unfolded and the roller 11 slides to the tail of the chute 3, after the pin shaft 12 is connected to the hook 4 and the main pedal 10 is lowered to the ground, the main pedal 10 presses down the linkage device 13, driving the extension pedal 14 to turn down and fit with the skin 2. At this time, the extension pedal 14 is flush with the main pedal 10, extending the effective length of the boarding ramp, reducing the climbing gradient and reducing the weight.

[0051] Embodiment Two:

[0052] Different from Embodiment One, please refer to Figure 6 and Figure 7 :

[0053] A locking mechanism for positioning is installed at the top of the skin 2. The locking mechanism includes a locking pin 15, a spring 16 and a pin seat 17. The bottom end of the pin seat 17 is bolted to the skin 2. The locking pin 15 is slidably connected inside the pin seat 17, and the locking pin 15 is slidably connected to the main pedal 10, so that the locking pin 15 can enter the inside of the main pedal 10 to position its position. A spring 16 is sleeved outside the locking pin 15 and inside the pin seat 17, so that when the locking pin 15 slides away from the main pedal 10 inside the pin seat 17, the spring 16 can be compressed. When the main pedal 10 is unfolded, the locking pin 15 is pulled and rotated, and the spring 16 is compressed by the movement of the locking pin 15. The end of the locking pin 15 disengages from the main pedal 10. After the main pedal 10 is retracted, the locking pin 15 is rotated in the reverse direction, the spring 16 is reset, and the locking pin 15 is inserted into the lock hole on the side of the pedal. The above structure is firm and simple. The manually telescopic pedal occupies a small space, retracts and extends quickly. The extension pedal 14 is linked with the main pedal 10, reducing the length of the main pedal 10, thereby reducing the size and weight, without affecting the departure angle of the vehicle-carrying vehicle. The pedal locking mechanism ensures safe and reliable retraction and extension;

[0054] Preferably, a semi-circular groove is formed inside the pin seat 17 on the side away from the main pedal 10, and the semi-circular groove is slidably connected to the locking pin 15, so that the locking pin 15 moving away from the main pedal 10 can be rotated by 90 degrees and then enter the inside of the semi-circular groove for limiting;

[0055] A specific application of this embodiment is: when the locking pin 15 slides away from the main pedal 10 inside the pin seat 17, the spring 16 can be compressed. When the main pedal 10 is unfolded, the locking pin 15 is pulled and rotated, and the locking pin 15 moving away from the main pedal 10 can be rotated by 90 degrees and then enter the inside of the semi-circular groove for limiting. The spring 16 is compressed by the movement of the locking pin 15, and the end of the locking pin 15 disengages from the main pedal 10. After the main pedal 10 is retracted, the locking pin 15 is rotated in the reverse direction, the spring 16 is reset, and the locking pin 15 is inserted into the lock hole on the side of the pedal. The above structure is firm and simple. The manually telescopic pedal occupies a small space, retracts and extends quickly. The extension pedal 14 is linked with the main pedal 10, reducing the length of the main pedal 10, thereby reducing the size and weight, without affecting the departure angle of the vehicle-carrying vehicle. The pedal locking mechanism ensures safe and reliable retraction and extension;

[0056] The frame assembly 1 and the skin 2 bear the weight of the driverless vehicle as the main body. With a special retractable structure, the pedal is hidden inside the chute 3, ensuring that the off-road performance and transportation performance of the vehicle are not affected. The fixed ring 6 and the limiter cooperate with the chute 3 and the support plate 5 on the platform surface to form a limiting mechanism, which is simple and firm in structure and provides the limiting function required for the driverless vehicle. The boarding pedal adopts a special split design, and the added linkage mechanism enables the main pedal 10 and the extension pedal 14 with a segmented structure design to achieve an integrated movement effect of synchronous flipping. Moreover, while ensuring the characteristics of simple structure, convenient retracting and deploying operation, and light weight, it provides sufficient adhesion coefficient and deployment angle to meet the maximum climbing performance requirements of the driverless vehicle. The locking mechanism composed of a locking pin 15, a spring 16, and a pin seat 17 is arranged at the rear end of the platform. The convenient pin locking operation ensures that the pedal does not swing during the driving of the main vehicle, improving safety and reliability. The overall layout scheme formed by integrating various structures of the platform has a high integration degree and a compact structure, realizing functions such as the load-bearing, fixing, and quick boarding and alighting of the driverless vehicle.

[0057] Embodiment 3:

[0058] Please refer to Figures 8 - 11 , which is different from Embodiment 1 and Embodiment 2 in that:

[0059] One end of the top of the skin 2 is equipped with a positioning mechanism for limiting the position of the main pedal 10. The positioning mechanism includes a protective housing 18, an angle rotation shaft 20, and a positioning card plate 21. Both ends of the bottom of the protective housing 18 are fixed with positioning support plates 19, and the positioning support plates 19 are bolted to the skin 2, thereby being able to fix the position of the protective housing 18. The angle rotation shaft 20 is rotatably connected inside the protective housing 18. Both ends of the angle rotation shaft 20 are fixed with positioning card plates 21, and the shape of the positioning card plate 21 is L-shaped. Thereby, the rotation of the angle rotation shaft 20 can drive the positioning card plate 21 to rotate, and the position of the main pedal 10 can be positioned or the main pedal 10 can be allowed to move through the rotation of the positioning card plate 21;

[0060] Inside the protective housing 18, a transmission mechanism is installed for driving the angular rotation shaft 20 to rotate. The transmission mechanism includes a limit rotation column 22, a first transmission gear 23, a second transmission gear 24, a lifting rack 25, an angle adjustment drive motor 26, a transmission worm 27, a transmission worm gear 28, a limit rotation shaft 29, a height adjustment thread section 30, and a height adjustment displacement plate 31. The angle adjustment drive motor 26 is fixed to the protective housing 18. The output end of the angle adjustment drive motor 26 is connected to a transmission worm 27. One side of the transmission worm 27 is meshed and connected to a transmission worm gear 28, so that the rotation of the transmission worm 27 can drive the meshed and connected transmission worm gear 28 to rotate. The inside of the transmission worm gear 28 is fixed with a limit rotation shaft 29, and the limit rotation shaft 29 is rotatably connected to the protective housing 18, making the rotation of the positioning support plate 19 more stable;

[0061] A height adjustment thread section 30 is provided on the outer side of the limit rotation shaft 29. A height adjustment displacement plate 31 is threadedly connected to the outer side of the height adjustment thread section 30, so that the rotation of the height adjustment thread section 30 can drive the height adjustment displacement plate 31 to move up and down. One end of the height adjustment displacement plate 31 is fixed with a lifting rack 25, and further, the up and down movement of the height adjustment displacement plate 31 can drive the lifting rack 25 to move up and down. One end of the lifting rack 25 away from the height adjustment displacement plate 31 is fixed with a height adjustment sliding block 32. The outer side of one end of the height adjustment sliding block 32 away from the lifting rack 25 is slidably connected to a limit plate 33, and the limit plate 33 is fixed to the protective housing 18, so that the up and down movement of the lifting rack 25 can be more stable through the sliding connection between the height adjustment sliding block 32 and the limit plate 33. One side of the lifting rack 25 is meshed and connected to a first transmission gear 23. The inside of the first transmission gear 23 is fixed with a limit rotation column 22, and the limit rotation column 22 is rotatably connected to the protective housing 18, so that the up and down movement of the lifting rack 25 drives the first transmission gear 23 to rotate. The top of the first transmission gear 23 is meshed and connected to a second transmission gear 24, and the second transmission gear 24 is fixed to the outer side of the angular rotation shaft 20, and further, the rotation of the second transmission gear 24 can drive the angular rotation shaft 20 to rotate. There is a gap between the second transmission gear 24 and the lifting rack 25;

[0062] A specific application of this embodiment is as follows: The angle adjustment drive motor 26 is electrically connected to an external power source. When the angle adjustment drive motor 26 is powered on, it drives the transmission worm 27 to rotate. The rotation of the transmission worm 27 drives the engaged transmission worm wheel 28 to rotate. The rotation of the transmission worm wheel 28 drives the limit rotation shaft 29 to rotate. The rotation of the limit rotation shaft 29 drives the height adjustment threaded section 30 to rotate. The rotation of the height adjustment threaded section 30 drives the height adjustment displacement plate 31 connected by threads to move up and down. The up and down movement of the height adjustment displacement plate 31 drives the lifting rack 25 to move up and down. The up and down movement of the lifting rack 25 is stably lifted through the sliding connection between the height adjustment sliding block 32 and the limit plate 33. The up and down movement of the lifting rack 25 simultaneously drives the engaged first transmission gear 23 to rotate. The rotation of the first transmission gear 23 drives the engaged second transmission gear 24 to rotate. The rotation of the second transmission gear 24 drives the angle rotation shaft 20 to rotate. The rotation of the angle rotation shaft 20 drives the positioning card plate 21 to rotate, thereby limiting the position of the main pedal 10 or disengaging from the main pedal 10.

[0063] The working principle is as follows: The cross beam, longitudinal beam, connecting plate and connecting bracket are welded to form the frame assembly 1. Then the skin 2 is welded to the outside of the top of the frame assembly 1. The support plate 5 is bolted to the frame assembly 1, so that the frame assembly 1, the skin 2 and the support plate 5 can be bolted together. The fixed rings 6 are longitudinally distributed on the outside of the support plate 5 along the platform body and are connected to the mounting holes of the frame cross beam. Then the support seat 7 is connected to the support plate 5, the skin 2 and the frame cross beam through the same hole. When the unmanned vehicle is fixed, the limit rod 8 passes through the mounting hole on the support seat 7 to prevent the unmanned vehicle from shaking back and forth when the vehicle accelerates or brakes. Then when the vehicle turns, the limit rod 8 disengages from the mounting hole of the support seat 7; the limit rod 8 passes through the hole in the upper part of the support seat 7, and a quick-release spring pin 9 is installed at the end of the limit rod 8 for locking. Thus, the main pedal 10 can be manually pulled to slide in a pull-out manner inside the chute 3, and the pin shaft 12 is located at one end of the chute 3 inside the main pedal 10 away from the inclined surface. Thus, the pin shaft 12 can be fixed inside the main pedal 10 by interference fit, so that the roller 11 can rotate on the outside of the pin shaft 12. When unfolded, the main pedal 10 slides onto the inclined surface, the pin shaft 12 is connected to the hook 4, and the tail end of the main pedal 10 is lowered to the ground; thus, the extension pedal 14 connected to the rear end of the support plate 5 can be synchronously turned down by operating the drive linkage device 13 to cover the chute 3. At this time, the linkage device 13 is in a free state, and the extension pedal 14 is turned up to be flush with the support plate 5. When the main pedal 10 is unfolded, the roller 11 slides to the end of the chute 3. After the pin shaft 12 is connected to the hook 4, during the process of the main pedal 10 being lowered to the ground, the main pedal 10 presses down the drive linkage device 13, driving the extension pedal 14 to turn down and fit with the skin 2. At this time, the extension pedal 14 is flush with the main pedal 10, extending the effective length of the boarding ramp, reducing the climbing gradient and reducing the weight.

[0064] When the locking pin 15 slides inward on the inner side of the pin seat 17 away from the main pedal 10, it can compress the spring 16. When the main pedal 10 is unfolded, by pulling and rotating the locking pin 15, the locking pin 15 moving away from the main pedal 10 can be rotated by 90 degrees and then enter the inside of the semi-circular groove for limiting. When the locking pin 15 moves, the spring 16 is compressed and the end of the locking pin 15 disengages from the main pedal 10. After the main pedal 10 is retracted, the locking pin 15 is rotated in the reverse direction, the spring 16 is reset, and the locking pin 15 is inserted into the lock hole on the side of the pedal. The above structure is firm and simple. The manually telescopic pedal occupies a small space, can be retracted and extended quickly, the extension pedal 14 is linked with the main pedal 10, the length of the main pedal 10 is reduced, and thus the size and weight are reduced, without affecting the departure angle of the vehicle. The pedal locking mechanism ensures safe and reliable retraction and extension;

[0065] The angle adjustment drive motor 26 is electrically connected to an external power source. When the angle adjustment drive motor 26 is powered on, it drives the transmission worm 27 to rotate. The rotation of the transmission worm 27 drives the engaged transmission worm wheel 28 to rotate. The rotation of the transmission worm wheel 28 drives the limit rotation shaft 29 to rotate. The rotation of the limit rotation shaft 29 drives the height adjustment thread section 30 to rotate. The rotation of the height adjustment thread section 30 drives the height adjustment displacement plate 31 connected by threads to move up and down. The up and down movement of the height adjustment displacement plate 31 drives the lifting rack 25 to move up and down. The up and down movement of the lifting rack 25 is stably lifted through the sliding connection between the height adjustment sliding block 32 and the limit plate 33. The up and down movement of the lifting rack 25 also drives the engaged first transmission gear 23 to rotate. The rotation of the first transmission gear 23 drives the engaged second transmission gear 24 to rotate. The rotation of the second transmission gear 24 drives the angle rotation shaft 20 to rotate. The rotation of the angle rotation shaft 20 drives the positioning card plate 21 to rotate, thereby limiting the position of the main pedal 10 or disengaging from the main pedal 10.

[0066] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A carrying platform, characterized in that, It includes a frame assembly (1), and a skin (2) is fixedly welded to the outside of the top of the frame assembly (1). Chutes (3) are provided on both sides of the top of the skin (2). One end of the chute (3) is provided with an inclined surface, and a hook (4) is fixed to the top of the inclined surface. A support plate (5) is bolted and fixed to the top of the skin (2) and at the top end of the chute (3). One end of the support plate (5) is rotatably connected to an extended pedal (14). A pedal mechanism for facilitating getting on the vehicle is installed on the skin (2). The pedal mechanism includes a main pedal (10) and an extended pedal (14). The main pedal (10) is slidably connected to the inside of the chute (3) and at the bottom end of the support plate (5). One end of the main pedal (10) is equipped with a pin shaft (12), and a roller (11) is rotatably connected to the outside of the pin shaft (12). A driving linkage device (13) for driving the extended pedal (14) is installed on the top of the skin (2). During the process of the main pedal (10) being lowered to the ground, the main pedal (10) presses down the linkage device (13), driving the extended pedal (14) to turn downwards and fit with the skin (2). At this time, the extended pedal (14) is flush with the main pedal (10).

2. The carrier platform according to claim 1, wherein, The frame assembly (1) is composed of cross beams, longitudinal beams, connecting plates and connecting brackets. The cross beams and longitudinal beams are fixedly welded in a staggered manner. Connecting plates are fixed to both ends of the longitudinal beams, and connecting brackets are fixed to the connecting brackets.

3. A carrier platform according to claim 1, characterized in that, An anti-slip member is fixed to the top of the support plate (5).

4. A carrier platform according to claim 1, characterized in that, A limiting mechanism is installed on the support plate (5). The limiting mechanism includes fixing rings (6) and limiters. Fixing rings (6) are evenly assembled on the outside of the support plate (5), and limiters are installed at both ends of the support plate (5).

5. A carrier platform according to claim 4, wherein The limiter includes a support seat (7), a limiting rod (8) and a spring pin (9). Support seats (7) are fixed to both sides at both ends of the support plate (5). The limiting rod (8) is slidably connected to the inside of the tops of two support seats (7) at the same end. A pin hole is provided inside one side of the limiting rod (8), and a spring pin (9) is installed inside the pin hole.

6. The carrier platform according to claim 1, wherein, A locking mechanism for positioning is installed on the top of the skin (2). The locking mechanism includes a locking pin (15), a spring (16) and a pin seat (17). The bottom end of the pin seat (17) is bolted and fixed to the skin (2). The locking pin (15) is slidably connected to the inside of the pin seat (17), and the locking pin (15) is slidably connected to the main pedal (10). A spring (16) is sleeved on the outside of the locking pin (15) and inside the pin seat (17).

7. A carrier platform according to claim 1, characterized in that, A positioning mechanism for limiting the position of the main pedal (10) is installed at one end of the top of the skin (2). The positioning mechanism includes a protective housing (18), an angle rotation shaft (20) and a positioning card plate (21). The angle rotation shaft (20) is rotatably connected to the inside of the protective housing (18), and positioning card plates (21) are fixed to both ends of the angle rotation shaft (20).

8. A carrier platform according to claim 7, characterized in that, Inside the protective housing (18), a transmission mechanism is installed for driving the angular rotation shaft (20) to rotate. The transmission mechanism includes a limit rotation column (22), a first transmission gear (23), a second transmission gear (24), a lifting rack (25), an angle adjustment drive motor (26), a transmission worm (27), a transmission worm gear (28), a limit rotation shaft (29), a height adjustment thread section (30), and a height adjustment displacement plate (31). The angle adjustment drive motor (26) is fixed to the protective housing (18). The output end of the angle adjustment drive motor (26) is connected to a transmission worm (27). One side of the transmission worm (27) is meshed and connected with a transmission worm gear (28). The inside of the transmission worm gear (28) is fixed with a limit rotation shaft (29), and the limit rotation shaft (29) is rotationally connected to the protective housing (18). A height adjustment thread section (30) is provided on the outer side of the limit rotation shaft (29). The outer side of the height adjustment thread section (30) is threadedly connected with a height adjustment displacement plate (31). One end of the height adjustment displacement plate (31) is fixed with a lifting rack (25). The end of the lifting rack (25) away from the height adjustment displacement plate (31) is fixed with a height adjustment sliding block (32). The outer side of the end of the height adjustment sliding block (32) away from the lifting rack (25) is slidably connected with a limit plate (33), and the limit plate (33) is fixed to the protective housing (18). One side of the lifting rack (25) is meshed and connected with a first transmission gear (23). The inside of the first transmission gear (23) is fixed with a limit rotation column (22), and the limit rotation column (22) is rotationally connected to the protective housing (18). The top of the first transmission gear (23) is meshed and connected with a second transmission gear (24), and the second transmission gear (24) is fixed on the outer side of the angular rotation shaft (20).

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