A retractable transport vehicle

Abstract

The present invention discloses a telescopic transport vehicle, comprising a first vehicle end, a second vehicle end, and a telescopic body. The longitudinal ends of the telescopic body are respectively connected to the first vehicle end and the second vehicle end. The telescopic body comprises a telescopic platform capable of synchronous longitudinal extension and contraction, and a vehicle shell telescopic assembly. The telescopic platform is located within the vehicle shell telescopic assembly. The vehicle shell telescopic assembly comprises a telescopic vehicle shell capable of extension and contraction in the vertical and front-back directions, a telescopic column for driving the telescopic vehicle shell to extend and contract in the vertical direction, and a telescopic frame capable of following the telescopic vehicle shell to extend and contract in the front-back direction. The telescopic vehicle shell can follow the telescopic column to extend and contract in the vertical direction, so that the space within the vehicle body structure can be expanded not only in the longitudinal direction but also in the height direction, so that it not only has strong torsional strength but also has a larger space. Therefore, it can effectively solve the problem of poor expandability of telescopic transport vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle bodies, and more particularly to a telescopic transport vehicle. Background Art

[0002] The market demand for logistics and distribution, represented by express delivery and food delivery, is increasing year by year, requiring more transportation capacity to meet this growing market demand. However, existing transportation methods are inefficient and face numerous challenges, such as insufficient delivery vehicles and low internal space utilization. Some current vehicles are only extendable in length, making it difficult to fully meet space requirements during use.

[0003] In summary, how to effectively solve the problem of poor expandability of retractable transport vehicles is an urgent problem that those skilled in the art need to solve. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a retractable transport vehicle, which can effectively solve the problem of poor expandability of retractable transport vehicles.

[0005] In order to achieve the above first object, the present invention provides the following technical solutions:

[0006] A telescopic transport vehicle comprises a first vehicle end, a second vehicle end and a telescopic body, wherein the longitudinal ends of the telescopic body are respectively connected to the first vehicle end and the second vehicle end, the telescopic body comprises a telescopic platform and a vehicle shell telescopic assembly that can be synchronously telescoped longitudinally, the telescopic platform is located within the vehicle shell telescopic assembly; the vehicle shell telescopic assembly comprises a telescopic vehicle shell that can be telescoped in the up-down and fore-and-aft directions, a telescopic column for driving the telescopic vehicle shell to telescope in the up-down direction, and a telescopic frame that can follow the telescopic vehicle shell to telescope in the fore-and-aft direction.

[0007] In the above technical solution, the telescopic vehicle shell and telescopic frame of the telescopic platform and the vehicle shell telescopic assembly can effectively avoid the problem of unreliable strength caused by the existence of only a single telescopic platform. The vehicle shell telescopic assembly can play a role in torsion resistance, making the strength of the entire vehicle body higher. At the same time, the telescopic vehicle shell can follow the telescopic column to telescope in the up and down directions, so that the space within the vehicle body structure can be expanded not only in the longitudinal direction, but also in the height direction, so that it not only has strong torsional strength, but also has a larger space. In summary, the telescopic transport vehicle can effectively solve the problem of poor expandability of telescopic transport vehicles.

[0008] Preferably, the telescopic platform of the telescopic platform includes a nested box structure and a frame-type telescopic mechanism for driving the nested box structure to be telescoped, the frame-type telescopic mechanism includes a first base plate, a second base plate and four connecting rods, every two connecting rods form a connecting rod group, and the two connecting rods of the connecting rod group are hingedly connected, and the two ends of the connecting rod group are hingedly connected to the first base plate and the second base plate respectively; the telescopic platform also includes a rack plate and a telescopic drive mechanism, the rack plate is slidably matched with the first base plate or the second base plate, and the two ends of the rack plate have racks facing opposite directions to engage with the gears on the connecting rods at the two ends of the base plate respectively, so as to drive the connecting rods at both ends to rotate in opposite directions when sliding to realize telescopic drive.

[0009] Preferably, the telescopic platform further comprises a base platform and a platform pushing device; the base platform has a cavity for accommodating the telescopic platform in a retracted state; the platform pushing device is installed on the base platform for pushing the telescopic platform out.

[0010] Preferably, a side roller is provided on the bottom plate at one end of the telescopic platform, and a side roller groove matching with the side roller is provided on a cavity wall on a corresponding side of the cavity.

[0011] Preferably, the platform pushing device includes a stepper motor, a crank-connecting rod mechanism and a piston, and the crank-connecting rod mechanism is connected between the main shaft of the stepper motor and the piston, so that the main shaft of the stepper motor rotates to push the piston to move horizontally, and the piston is connected to the bottom plate at one end of the telescopic platform.

[0012] Preferably, the telescopic platform includes a plurality of telescopic units connected in sequence, and each of the telescopic units includes the base platform and the telescopic platform; the telescopic platform also includes retractable slide grooves arranged on both sides of the telescopic unit, and the slide grooves are used to guide the movement of the telescopic unit; it also includes an angular displacement sensor for detecting the rotation angle of the connecting rod and a hydraulic numerical control device for controlling the telescopic drive degree of the telescopic drive mechanism.

[0013] Preferably, it further comprises a platform lifting device, wherein a plurality of the telescopic platforms are arranged up and down, and the platform lifting device is used to drive at least one of the telescopic platforms to move up and down.

[0014] Preferably, the multiple telescopic platforms include a bottom telescopic platform, a first-level superimposed telescopic platform, and a second-level superimposed telescopic platform; both ends of the bottom telescopic platform are connected to the first vehicle end and the second vehicle end respectively; the first-level superimposed telescopic platform and the second-level superimposed telescopic platform are both installed on the internal lifting mechanism through the platform lifting device.

[0015] Preferably, the telescopic vehicle shell includes a top telescopic shell group and a bottom telescopic shell group that can move relative to each other in the up and down directions; the bottom telescopic shell group includes a bottom telescopic plate group and a bottom slide, and the bottom telescopic plate group is formed by sheathing a bottom outer plate and a bottom inner plate; the top telescopic shell group includes a top telescopic plate group and a top slide, and the top telescopic plate group is formed by sheathing a top outer plate and a top inner plate; the bottom slides arranged at the longitudinal ends and the longitudinal middle of the bottom telescopic shell group respectively cooperate with the top slides arranged at the longitudinal ends and the longitudinal middle of the top telescopic shell group to slide up and down; the platform lifting device and the top telescopic shell group are both installed on the top column of the telescopic column to be driven to rise and fall by the telescopic column.

[0016] Preferably, the first vehicle end and the second vehicle end are both provided with a wheel assembly, and the wheel assembly includes a wheel, a crank connecting rod and a hydraulic support device; the lower end of the hydraulic support device is connected to the wheel, and the upper end is connected to the vehicle end; the crank connecting rod includes a triangular bracket and a straight-rotating shaft, the tip part of the triangular bracket is hinged to one end of the straight-rotating shaft, the open ends of the triangular bracket are both abutted against the upper end of the hydraulic support device and can rotate relative to each other, and the other end of the straight-rotating shaft is hingedly connected to the lower end of the hydraulic support device; at least one of the first vehicle end and the second vehicle end is provided with a power system, and the power system includes a motor and a power transmission system, the motor is installed at the vehicle end, and the power transmission system mainly includes a universal joint, a universal joint telescopic rod, a gear transmission assembly and a transmission shaft that are sequentially connected in transmission, and the transmission shaft is transmission connected to the wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a retractable transport vehicle in a retracted state provided by an embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram of a retractable transport vehicle in an expanded state provided by an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the internal structure of a retractable transport vehicle in a retracted state provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the internal structure of a retractable transport vehicle in an expanded state provided by an embodiment of the present invention;

[0022] Figure 5 A schematic structural diagram of a lifting and telescopic frame provided in an embodiment of the present invention;

[0023] Figure 6 A schematic structural diagram of a telescopic frame provided by an embodiment of the present invention;

[0024] Figure 7 A schematic structural diagram of a lifting frame provided by an embodiment of the present invention;

[0025] Figure 8 A schematic structural diagram of a bottom telescopic platform in a retracted state provided by an embodiment of the present invention;

[0026] Figure 9 A schematic structural diagram of a bottom telescopic platform provided by an embodiment of the present invention when the platform is extended to its maximum extent;

[0027] Figure 10 A schematic structural diagram of a telescopic unit provided by an embodiment of the present invention when the telescopic unit is extended to its maximum state;

[0028] Figure 11 A side sectional view of a telescopic unit provided by an embodiment of the present invention;

[0029] Figure 12 A schematic diagram of the structure of a base station provided by an embodiment of the present invention;

[0030] Figure 13 A schematic diagram of an expanded telescopic platform provided in an embodiment of the present invention;

[0031] Figure 14 A schematic diagram of the local structure of a telescopic platform during contraction provided by an embodiment of the present invention;

[0032] Figure 15 A schematic diagram of the partial structure of a telescopic platform provided in an embodiment of the present invention;

[0033] Figure 16 A schematic diagram of the partial structure of a telescopic drive unit of a telescopic platform provided in an embodiment of the present invention;

[0034] Figure 17 A schematic structural diagram of a platform ejection device provided in an embodiment of the present invention;

[0035] Figure 18 A schematic structural diagram of an internal lifting assembly in a retracted state provided by an embodiment of the present invention;

[0036] Figure 19 A schematic structural diagram of an internal lifting assembly in an open state provided by an embodiment of the present invention;

[0037] Figure 20 A schematic structural diagram of a platform lifting device provided in an embodiment of the present invention;

[0038] Figure 21 A schematic diagram of the partial structure of a top telescopic mechanism provided in an embodiment of the present invention;

[0039] Figure 22 A schematic structural diagram of a wheel assembly provided by an embodiment of the present invention;

[0040] Figure 23 A schematic structural diagram of a crank connecting rod provided in an embodiment of the present invention;

[0041] Figure 24 A schematic structural diagram of a hydraulic support device provided in an embodiment of the present invention;

[0042] Figure 25 A schematic diagram of the structure of a power system provided by an embodiment of the present invention;

[0043] Figure 26 A schematic structural diagram of a power transmission system provided by an embodiment of the present invention;

[0044] Figure 27 A schematic structural diagram of a gear transmission assembly provided by an embodiment of the present invention;

[0045] Figure 28 A schematic diagram of the structure of a central control system provided by an embodiment of the invention;

[0046] Figure 29 The overall operation flow chart of the retractable vehicle body provided by the embodiment of the present invention;

[0047] Figure 30 This is a flowchart of the operation of the telescopic drive of the telescopic platform provided in an embodiment of the present invention;

[0048] Figure 31 This is a flow chart of the operation of the internal platform up and down telescopic mechanism provided in an embodiment of the present invention.

[0049] The following are marked in the accompanying drawings:

[0050] Telescopic shell assembly 1, telescopic shell 11, bottom telescopic shell assembly 111, bottom telescopic plate assembly 1111, bottom slide 1112, top telescopic shell assembly 112, top telescopic plate assembly 1121, top slide 1122, telescopic frame 12, transverse connecting rod 121, cross telescopic rod 122, telescopic column 13, bottom column 131, top column 132, sliding sleeve 133, headlight 14;

[0051] Bottom telescopic platform 2, platform body 21, telescopic unit 22, base platform 221, side roller groove 2211, inner limit plate 2212, outer limit plate 2213, telescopic platform 222, first bottom plate 2221, second bottom plate 2222, rack plate 2223, gear 2224, connecting rod 2225, hydraulic pump 2226, first nesting box 2227, second nesting box 2228, side roller 2229, angular displacement sensor 223, hydraulic numerical control device 224, platform ejection device 225, stepping motor 2251, crank connecting rod mechanism 2252, piston 2253, slide 23, fixed slot unit 231, sliding slot unit 232, slot telescopic device 233;

[0052] Internal lifting assembly 3, top telescopic mechanism 31, top connecting rod 311, top connecting plate 312, threaded hole 3121, first-level stacking telescopic platform 32, second-level stacking telescopic platform 33, platform lifting device 34, inner connecting rod 341, second-inner connecting rod 342, second-outer connecting rod 343, outer connecting rod 344, second-level connecting block 35, first-level connecting block 36;

[0053] First vehicle end 4, crank connecting rod 41, triangular bracket 411, linear axis 412, hydraulic support device 42, hydraulic structure 421, fork 422, wheel 43, tire 431, wheel hub 432;

[0054] The second vehicle end 5, the motor 51, the power transmission system 52, the universal joint 521, the universal joint telescopic rod 522, the gear transmission assembly 523, the large bevel gear 5231, the small bevel gear 5232, and the transmission shaft 524;

[0055] Central control system 6, central processor 61, external interactive buttons 62 and display screen 63. DETAILED DESCRIPTION

[0056] An embodiment of the present invention discloses a telescopic transport vehicle, which can effectively solve the problem of poor expandability of telescopic transport vehicles.

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0058] See also Figures 1-31 , Figure 1 A schematic structural diagram of a retractable transport vehicle in a retracted state provided by an embodiment of the present invention; Figure 2A schematic structural diagram of a retractable transport vehicle in an expanded state provided by an embodiment of the present invention; Figure 3 A schematic diagram of the internal structure of a retractable transport vehicle in a retracted state provided by an embodiment of the present invention; Figure 4 A schematic diagram of the internal structure of a retractable transport vehicle in an expanded state provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a lifting and telescopic frame provided in an embodiment of the present invention; Figure 6 A schematic structural diagram of a telescopic frame provided by an embodiment of the present invention; Figure 7 A schematic structural diagram of a lifting frame provided by an embodiment of the present invention; Figure 8 A schematic structural diagram of a bottom telescopic platform in a retracted state provided by an embodiment of the present invention; Figure 9 A schematic structural diagram of a bottom telescopic platform provided by an embodiment of the present invention when the platform is extended to its maximum extent; Figure 10 A schematic structural diagram of a telescopic unit 22 provided in an embodiment of the present invention when the telescopic unit 22 is extended to its maximum state; Figure 11 A side cross-sectional view of a telescopic unit 22 provided in an embodiment of the present invention; Figure 12 A schematic diagram of the structure of a base platform 221 provided in an embodiment of the present invention; Figure 13 A schematic diagram of the expansion of a telescopic platform 222 provided in an embodiment of the present invention; Figure 14 A schematic diagram of the local structure of a telescopic platform during contraction provided by an embodiment of the present invention; Figure 15 A schematic diagram of the partial structure of a telescopic platform provided in an embodiment of the present invention; Figure 16 A schematic diagram of a partial structure of a telescopic drive portion of a telescopic platform 222 provided in an embodiment of the present invention; Figure 17 A schematic structural diagram of a platform pushing device 225 provided in an embodiment of the present invention; Figure 18 A schematic structural diagram of an internal lifting assembly in a retracted state provided by an embodiment of the present invention; Figure 19 A schematic structural diagram of an internal lifting assembly in an open state provided by an embodiment of the present invention; Figure 22 A schematic structural diagram of a wheel assembly provided by an embodiment of the present invention; Figure 23 A schematic structural diagram of a crank connecting rod provided in an embodiment of the present invention; Figure 24 A schematic structural diagram of a hydraulic support device provided in an embodiment of the present invention; Figure 25 A schematic diagram of the structure of a power system provided by an embodiment of the present invention; Figure 26 A schematic structural diagram of a power transmission system provided by an embodiment of the present invention; Figure 27 A schematic structural diagram of a gear transmission assembly provided by an embodiment of the present invention; Figure 28 A schematic diagram of the structure of a central control system provided by an embodiment of the invention; Figure 29The overall operation flow chart of the retractable vehicle body provided by the embodiment of the present invention;

[0059] Figure 30 This is a flowchart of the operation of the telescopic drive of the telescopic platform provided in an embodiment of the present invention; Figure 31 This is a flow chart of the operation of the internal platform up and down telescopic mechanism provided in an embodiment of the present invention.

[0060] In one embodiment, a telescopic transport vehicle is provided, comprising a first vehicle end 4, a second vehicle end 5, and a telescopic body. The telescopic body is longitudinally connected to the first vehicle end 4 and the second vehicle end 5 at either end. Of the first vehicle end 4 and the second vehicle end 5, one can serve as the front of the vehicle and be equipped with a headlight 14, while the other can serve as the rear of the vehicle. Both the first vehicle end 4 and the second vehicle end 5 generally have running wheels, and a drive device for driving the vehicle can be provided at either the rear or the front of the vehicle.

[0061] The telescopic vehicle body comprises a telescopic platform and a telescopic shell assembly, wherein the telescopic platform and the telescopic shell assembly can be synchronously telescoped longitudinally. The telescopic platform is located inside the telescopic shell assembly so that the telescopic shell assembly can protect the cargo on the telescopic platform.

[0062] The vehicle shell telescopic assembly includes a telescopic vehicle shell capable of vertical and longitudinal expansion, a telescopic column for driving the vertical expansion of the telescopic vehicle shell, and a telescopic frame capable of following the longitudinal expansion of the telescopic vehicle shell. The vertical expansion and contraction of the telescopic vehicle shell further expands the space in the vertical direction, while the telescopic column can be driven to extend and retract in the vertical direction. The longitudinal expansion and retraction can be achieved by a drive mechanism or by a speed difference between the first and second vehicle ends. The specific configuration can be as needed.

[0063] The telescopic vehicle shell and telescopic frame of the telescopic platform and vehicle shell telescopic assembly can effectively avoid the problem of unreliable strength caused by the existence of only a single telescopic platform. The telescopic vehicle shell assembly can play a role in torsion resistance, making the entire vehicle body stronger. At the same time, the telescopic vehicle shell can follow the telescopic column to telescope in the vertical direction, so that the space within the vehicle body structure can be expanded not only in the longitudinal direction, but also in the height direction, so that it not only has strong torsional strength, but also has a larger space. In summary, this telescopic transport vehicle can effectively solve the problem of poor expandability of telescopic transport vehicles.

[0064] See Figure 1-2 , Figure 1 A schematic structural diagram of a retractable transport vehicle in a retracted state provided by an embodiment of the present invention; Figure 2A schematic structural diagram of the unfolded state of a retractable transport vehicle provided by an embodiment of the present invention. In the retractable transport vehicle, when longitudinally unfolding and highly unfolding are performed, the retractable vehicle shell 11 of the vehicle shell telescopic assembly 1 is correspondingly telescoped in the height and longitudinal direction. Specifically, the telescopic vehicle shell 11 mainly includes a bottom telescopic shell group 111 and a top telescopic shell group 112, wherein the bottom telescopic shell group 111 and the top telescopic shell group 112 are both capable of telescoping in the longitudinal direction, and can be telescoped synchronously in the longitudinal direction (front and back). In one embodiment, the two ends of the bottom telescopic shell group 111 are respectively relatively fixed with the first vehicle end and the second vehicle end in the up and down directions, while the two ends of the top telescopic shell group 112 are respectively slidably matched with the first vehicle end and the second vehicle end in the up and down directions, and can be driven to rise and fall by a driving mechanism. The longitudinal telescopic method of the bottom telescopic shell group 111 and the top telescopic shell group 112 is mainly to telescope through an overlapping relationship, and of course, it can also be telescoping by using a folding part. Of course, the telescopic adjustment of the bottom telescopic shell group 111 and the top telescopic shell group 112 in the vertical direction can also be achieved by overlapping or folding. The folding method refers to folding in a wave shape, while the overlapping method refers to the inner and outer outer arrangements and sliding fit.

[0065] The bottom telescopic shell group 111 includes a bottom telescopic plate group 1111 and a bottom slide 1112, wherein the bottom telescopic plate group 1111 is mainly formed by the bottom outer plate and the bottom inner plate, wherein the bottom inner plate can move relative to the bottom outer plate to a state of being roughly parallel in the longitudinal direction, and can move to be horizontally stacked to be aligned in the longitudinal direction.

[0066] Correspondingly, the top telescopic shell group 112 mainly includes a top telescopic plate group 1121 and a top slide 1122, wherein the top telescopic plate group 1121 is mainly formed by the top outer plate and the top inner plate. Similarly, the top outer plate can move relative to the top inner plate to a state of being roughly parallel in the longitudinal direction, and can move to be horizontally stacked to be aligned in the longitudinal direction.

[0067] Specifically, bottom sliders 1112 can be provided at both longitudinal ends and the middle portion of the bottom telescopic housing assembly 111 to slide and cooperate with top sliders 1122 provided at both longitudinal ends and the middle portion of the top telescopic housing assembly 112, respectively, in a one-to-one sliding manner, thereby constraining their longitudinal positional relationship. Specifically, the bottom slider 1112 at the front end slides and cooperates with the top slider 1122 at the front end, while the bottom slider 1112 at the rear end slides and cooperates with the top slider 1122 at the rear end; and the bottom slider 1112 at the middle portion slides and cooperates with the top slider 1122 at the middle portion.

[0068] The longitudinal end bottom slides and the longitudinal middle bottom slides are connected by a set of inner and outer bottom outer panels and bottom inner panels, one of which is fixedly connected to the bottom outer panel and the other is fixedly connected to the bottom inner panel. One of the fixed connections can be detachable so that the door can be used as a door body.

[0069] The top slides at the longitudinal ends and the top slides in the longitudinal middle are connected by a set of top outer panels and top inner panels arranged inside and outside, with one of the panels fixedly connected to the top outer panel and the other fixedly connected to the top inner panel. One of the fixed connections can be detachable so that the door can be used as a door body.

[0070] When the top telescopic shell assembly is sleeved on the outside of the bottom telescopic shell assembly, the top inner plate should be sleeved on the outside of the bottom outer plate so as not to interfere with each other. Correspondingly, the top slide is located outside the bottom slide.

[0071] In some embodiments, the relative movement of the inner and outer panels can also be achieved by a separate drive mechanism. In this case, only one end of the telescopic panel set is fixed to the slider, so that the other end can be driven to extend and retract by the drive mechanism. When the slider is stationary, the telescopic panel set can be retracted to achieve the effect of opening a door. In this case, the telescopic panel set is equivalent to a car door. Of course, car doors can also be provided at the ends of the car.

[0072] Specifically, if one end of at least one bottom telescopic plate group 111 in the longitudinal direction is fixed to the top slide at the longitudinal end or the top slide in the longitudinal middle, and a telescopic drive mechanism is provided to drive the other end of the bottom telescopic plate group 111 in the longitudinal direction to move longitudinally, when the vehicle shell telescopic assembly is longitudinally extended, the bottom telescopic plate group 111 contracts, indicating that the vehicle door is open, and when the bottom telescopic plate group 111 is expanded, it indicates that the vehicle door is closed.

[0073] See Figure 3-7 , Figure 3 A schematic diagram of the internal structure of a retractable transport vehicle in a retracted state provided by an embodiment of the present invention; Figure 4 A schematic diagram of the internal structure of a retractable transport vehicle in an expanded state provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a lifting and telescopic frame provided in an embodiment of the present invention; Figure 6 A schematic structural diagram of a telescopic frame provided by an embodiment of the present invention; Figure 7 A schematic structural diagram of a lifting frame provided in an embodiment of the present invention.

[0074] The vehicle shell telescopic assembly 1 further includes a telescopic column 13 and a telescopic frame 12, wherein the bottom column 131 of the telescopic column 13 is fixed to the vehicle end, while the top column 132 is movable up and down. The bottom telescopic shell group 111 is relatively fixed to the bottom column 131 of the telescopic column 13 in the vertical direction, while the top telescopic shell group 112 is relatively fixed to the top column 132 of the telescopic column 13, so that when the top column 132 moves up and down, the top telescopic shell group 112 can be driven to move relative to the bottom telescopic shell group 111 in the vertical direction to adjust the telescopic movement in the vertical direction. As shown in the accompanying drawings, four telescopic columns 13 can be provided, respectively arranged at the four corners for synchronous drive. In this case, two telescopic columns 13 are respectively fixed to the first vehicle end 4 and the second vehicle end 5; of course, two telescopic columns 13 can also be provided, respectively arranged at the first vehicle end and the second vehicle end.

[0075] The telescopic frame 12 is generally a cross telescopic frame, which is mainly formed by a combination of X-shaped hinges. Of course, it can also be other telescopic frame structures. The strength is mainly increased in the transverse direction. Specifically, the telescopic frame 12 mainly includes two cross telescopic rods 122 located on both sides and transverse connecting rods 121 respectively connected to the cross telescopic rods 122 on both sides at both ends. In actual installation, the transverse connecting rods 121 at both ends in the longitudinal direction can be respectively fixed on the top columns 132 of the telescopic columns 13 located at both ends in the longitudinal direction. Specifically, the transverse connecting rods 121 can be connected to the upper part of the cross telescopic rods 122, and the lower part of the cross telescopic rods 122 can be slidably matched with the bottom column 131 up and down through the sliding sleeve 133. Specifically, the top column 132 can be inserted into the bottom column 131 and the two can slide together directly or indirectly, so that when the telescopic column 13 is a multi-stage telescopic column, the top column 132 and the bottom column 131 can slide together indirectly.

[0076] As attached Figure 3 、 4 As shown, the telescopic platform includes not only the bottom telescopic platform 2 but also an internal telescopic assembly. The internal telescopic assembly is also equipped with multiple telescopic platforms, namely, the stacked telescopic platforms mentioned below. The internal telescopic assembly can also be mounted on the top column 132 of the telescopic column 13, so that it rises with the top column 132 first, and then the stacked telescopic platforms of the internal telescopic assembly are expanded in the vertical direction.

[0077] In some embodiments, a telescopic platform is provided, such as the attached Figure 8-17 shown.

[0078] See Figure 8 , Figure 8The figure below is a schematic diagram of the structure of a telescopic bottom platform in its retracted state, provided by an embodiment of the present invention. It primarily comprises a platform body 21 and a slide 23. The slide 23 allows the platform body 21 to slide within a defined track and also assists in stabilizing the overall structure. The platform body 21 is primarily formed by six telescopic units 22 connected in sequence.

[0079] See Figure 9 , Figure 9 The figure shows a schematic diagram of the structure of a bottom telescopic platform provided by an embodiment of the present invention, which is extended to its maximum state. In the illustrated mechanism, each telescopic unit 22 is extended to its maximum configuration. The chutes on both sides also include a plurality of slot units. On one side, a slot telescopic device 233 is provided between adjacent slot units to drive the connected slot units to move away from each other to adapt to the telescopic deformation of the platform body 21. The slot units at both ends of each side are fixed slot units 231, which are respectively fixed to the first and second vehicle ends; the slot units in the middle of each side are sliding slot units 232, which are mainly used to limit the platform body 21. Generally, a slot body is provided to guide the movable parts of the platform body 21. The slot telescopic device 233 is generally a hydraulic telescopic cylinder, or a pneumatic telescopic cylinder, or an electric cylinder. When in use, after the chute 23 is extended, the telescopic units 22 are extended forward in sequence to form the platform body 21 of the required size.

[0080] See Figure 10 , Figure 10 Figure 2 is a schematic diagram of a telescopic unit 22 according to an embodiment of the present invention, shown in its fully extended state. The telescopic unit 22 primarily comprises a base 221 and a telescopic platform 222. When the telescopic platform 222 is extended, its surface can be longitudinally aligned with the surface of the base 221 and can be expanded. To achieve better compression, the telescopic platform 222 is preferably retracted so that it can be accommodated within the cavity of the base 221.

[0081] The telescopic structure of the telescopic platform 222 can be retracted in a folding manner or in a sleeve direction. Figure 10 、 11 , 13, wherein the telescopic structure of telescopic platform 222 is primarily telescopically arranged through a sleeve arrangement, similar to the sleeve arrangement of a telescopic rod. As shown in the accompanying drawings, the telescopic structure of telescopic platform 222 is actually formed by splicing two sets of telescopic components. Each set of telescopic components includes multiple sliding members that are sequentially sleeved from the inside out. The two sets of telescopic components on the telescopic structure of telescopic platform 222 are arranged opposite each other, with the innermost sliding members connected to each other and the outermost sliding members connected to the bottom plates at both ends.

[0082] See Figure 11 , Figure 11FIG2 is a side cross-sectional view of a telescopic unit 22 provided in an embodiment of the present invention. This view clearly illustrates the internal structure of the telescopic unit 22. The telescopic unit 22 is provided with a platform ejection device 225, which is used to eject and retract the entire telescopic platform 222 from the cavity of the base platform 221.

[0083] The first end of the telescopic platform 222, along the telescopic direction, serves as the mounting end and is slidably connected to the base platform 221. The second end of the telescopic platform 222, along the telescopic direction, serves as the telescopic end and is connected to the base platform 221 of another telescopic unit 22. For the end telescopic unit 22, the second end is connected to the vehicle end. A platform push-out device 225 is installed between the first end and the base platform 221 to push out or retract the entire telescopic platform 222 during extension.

[0084] See Figure 12 , Figure 12 This diagram illustrates the internal structure of a base platform 221 provided in an embodiment of the present invention. Within the cavity for accommodating the foldable telescopic platform 222, side roller grooves 2211 are provided on both the left and right walls of the cavity to limit the sliding movement of the telescopic platform 222. Rolling motion also reduces frictional resistance, ensuring smoother operation of the various mechanisms.

[0085] An inner limit plate 2212 and an outer limit plate 2213 are also provided in the cavity to limit the displacement of the built-in telescopic platform 222 as a whole. The size of the displacement limit is related to the distance that the platform telescopic driving device 225 can drive.

[0086] See Figure 13 , Figure 13 The following is a schematic diagram of the expansion of a telescopic platform 222 provided in an embodiment of the present invention. The telescopic mechanism of the telescopic platform 222 is a frame-type structure, which can also be a telescopic cylinder, such as a hydraulic cylinder or an electric cylinder. The telescopic mechanism mainly includes a first base plate 2221, a second base plate 2222, and four connecting rods 2225, which are connected in sequence to form a rectangle, that is, every two connecting rods 2225 form a group and are hinged to each other. The first base plate 2221 and the second base plate 2222 are hinged at both ends of a connecting rod group. When the angle between the connecting rod 2225 and the base plate connected to the connecting rod changes, such as in a vertical state, due to the constraint relationship of the hinge, the distance between the first base plate 2221 and the second base plate 2222 is the farthest. When the angle is rotated to the minimum, the distance between the first base plate 2221 and the second base plate 2222 is the minimum. The telescopic adjustment is achieved by rotating the connecting rod 2225 relative to the base plate.

[0087] The first bottom plate 2221 and the second bottom plate 2222 are respectively connected to the two ends of the telescopic structure of the telescopic platform 222. As shown in the accompanying drawings, the telescopic structure of the telescopic platform 222 includes a first nested box 2227 and a second nested box 2228. The nested boxes are telescopically arranged in a nested manner. The outer slide of the first nested box 2227 is mounted on the first bottom plate 2221, while the outer slide of the second nested box 2228 is mounted on the second bottom plate 2222. The innermost slide of the first nested box 2227 and the innermost slide of the second nested box 2228 are fixedly connected.

[0088] See Figure 14 , Figure 14 This is a schematic diagram of the local structure of a telescopic platform provided by an embodiment of the present invention when it is retracted, wherein an angular displacement sensor 223 is provided between two connected connecting rods 2225 to detect the angle between the two adjacent connecting rods 2225 and then determine the telescopic state.

[0089] See Figure 15 , Figure 15 This is a partial structural diagram of a telescopic platform provided in an embodiment of the present invention. Specifically, the telescopic drive unit of the telescopic platform 222 further includes a rack plate 2223, wherein the rack plate 2223 slides with the corresponding base plate, such as the second base plate 2222 or the first base plate 2221. The racks at both ends of the rack plate 2223 respectively mesh with gears 2224 on the connecting rods 2225 at both ends of the base plate. When the rack plate 2223 slides, the racks of the corresponding racks face opposite directions, thereby causing the connecting rods 2225 at both ends to rotate in opposite directions to achieve expansion and retraction.

[0090] Furthermore, the left and right sides of the first bottom plate 2221 may be provided with side rollers 2229 , which cooperate with the side roller grooves 2211 in the base platform 221 to achieve the limited movement of the built-in telescopic platform 222 .

[0091] See Figure 16 , Figure 16 A schematic diagram of the partial structure of the telescopic drive unit of a telescopic platform 222 provided in an embodiment of the present invention. This diagram illustrates the coordination between the hydraulic pump 2226 and the hydraulic numerical control device 224. The hydraulic numerical control device 224 calculates the distance the platform has extended and converts the signal into the horizontal displacement parameters of the hydraulic pump 2226, thereby completing the entire automatic control process. The hydraulic pump 2226 is used to drive the rack plate 2223 back and forth to control the extension and retraction of the telescopic drive mechanism. Of course, other telescopic drive mechanisms besides the hydraulic pump 2226 can also be used to drive the rack plate 2223 to slide.

[0092] See Figure 17 , Figure 17This is a schematic diagram of the structure of a platform ejection device 225 provided in an embodiment of the present invention. The platform ejection device 225 primarily comprises a stepper motor 2251, a crank-connecting rod mechanism 2252, and a piston 2253. Driven by the motor, the circular motion of the crank-connecting rod mechanism 2252 is converted into horizontal motion of the piston 2253. The piston 2253, in conjunction with the internal first base plate 2221, enables the overall forward and backward movement of the telescopic platform 222. The forward and backward extension distance of the internal telescopic platform 222 can be controlled by intelligently controlling the rotational parameters of the stepper motor.

[0093] In some embodiments, in addition to the aforementioned bottom telescopic platform 2, at least one stacking telescopic platform 3 may also be provided. The structure of the stacking platform can refer to the structure of the aforementioned bottom telescopic platform. The stacking telescopic platform is mounted on the bottom telescopic platform and can be raised and lowered by a lifting mechanism to extend vertically. Similarly to the bottom telescopic platform, the stacking telescopic platform can also be extended longitudinally. Its structure can refer to the structure of the telescopic platform described in any of the aforementioned embodiments.

[0094] See Figure 18 , Figure 18This is a schematic diagram of the structure of an internal lifting assembly in a retracted state, provided in an embodiment of the present invention. In this telescopic transport vehicle, two stacked telescopic platforms are arranged one above the other on a bottom telescopic platform. Specifically, the telescopic transport vehicle is equipped with an internal lifting assembly, which includes a top telescopic mechanism 31, a first-level stacked telescopic platform 32, a second-level stacked telescopic platform 33, and a platform lifting device 34. The platform lifting device shown in the figure primarily comprises a lifting rod, but it can also be other driving devices capable of driving the stacked telescopic platforms up and down, such as a telescopic frame structure. The first-level stacked telescopic platform 32 and the second-level stacked telescopic platform 33 constitute the two stacked telescopic platforms arranged one above the other. Their telescopic arrangement can be similar to that of the bottom telescopic platform, i.e., the bottom telescopic platform in any of the above embodiments. In actual use, the space between the first-level stacked telescopic platform 32 and the second-level stacked telescopic platform 33 can be freely adjusted to determine whether items are to be stored, depending on the amount of cargo to be transported and the required space. The top telescopic mechanism 31 can function as a platform, employing any of the above-mentioned telescopic platforms, or it can simply serve as a support, providing support on top of the second-level stacked telescopic platform 33. The height between the top telescopic mechanism 31 and the secondary stacked telescopic platform 33 is also preferably adjustable. During installation, the longitudinal ends of the top telescopic mechanism 31 are fixedly connected to the corresponding top columns 132, while the platform lifting device 34 drives the primary stacked telescopic platform 32 and the secondary stacked telescopic platform 33 to descend sequentially, deploying them vertically. The platform lifting device 34 is mounted on the top column of the telescopic column via the top telescopic mechanism 31, and is driven up and down by the telescopic column.

[0095] See Figure 19 , Figure 19 This is a schematic diagram of the structure of an internal lifting assembly in the open state provided by an embodiment of the present invention. The base platforms at the corresponding positions of each stacked telescopic platform are respectively connected to different parts of the same platform lifting device 34 to be driven up and down by the platform lifting device. Platform lifting devices are set on both the left and right sides, and two platform lifting devices are set on one side of the base platform. A stacked telescopic platform is provided with six telescopic units arranged in parallel, so there are six base platforms. If two platform lifting devices are set on the left and right ends of a base platform, then a total of six times four platform lifting devices are provided, totaling twenty-four. The end of the platform lifting device 34 is connected to the first connecting block 36 on the side of the first stacked telescopic platform 32, and the middle part is connected to the second connecting block 35 on the side of the second stacked telescopic platform 33. The above-mentioned slide groove 23 is provided on the side of the bottom telescopic platform 2.

[0096] The platform lifting device here not only drives the lifting between the first-level superimposed telescopic platform 32 and the second-level superimposed telescopic platform 33, but also drives the lifting between the top telescopic mechanism 31 and the second-level superimposed telescopic platform 33.

[0097] See Figure 20 , Figure 20 This is a schematic diagram of the structure of a platform lifting device provided by an embodiment of the present invention. The platform lifting device primarily comprises an inner connecting rod 341, a sub-inner connecting rod 342, a sub-outer connecting rod 343, and an outer connecting rod 344, nested together. The telescopic dimensions are automatically controlled. The specific telescopic principle can be referred to as a telescopic arm. Typically, a multi-stage hydraulic telescopic mechanism is internally provided to drive the various connecting rods.

[0098] See Figure 21 , Figure 21 The top telescopic mechanism 31 is a partial structural diagram of a top telescopic mechanism 31 provided in an embodiment of the present invention. The top telescopic mechanism 31 includes a top connecting rod 311 and a top connecting plate 312. Figure 4 As shown, the top connecting rod 311 cooperates with the central hinge axis of the cross telescopic rod 122 to achieve synchronous telescopic movement in the front-to-back direction. Four threaded holes 3121 are provided on one side of the top connecting plate 312, which are fixedly connected to the outer connecting rod 344. The end of the sub-outer connecting rod 343, closest to the outer connecting rod 344, is fixedly connected to the base of the secondary stacked telescopic platform 33. The end of the inner connecting rod 341 is fixedly connected to the base of the primary stacked telescopic platform 32.

[0099] In some embodiments, wheel assemblies are provided at the first and second vehicle ends, and the wheel assemblies can be configured accordingly as needed. Both the first and second vehicle ends can be provided with active wheel assemblies, or one can be provided with an active wheel assembly and the other with a passive wheel assembly. The configuration of the wheel assemblies can refer to existing technologies. Considering that vibration damping is required for smoother operation, the specific structure of the wheel assemblies can refer to any of the following embodiments.

[0100] See Figure 22 , Figure 22 This is a schematic diagram of the structure of a wheel assembly provided by an embodiment of the present invention. It primarily includes a wheel 43 and a shock-absorbing mechanism. The wheel primarily comprises a tire 431 and a hub 432. In some cases, the wheel 43 may not be equipped with the tire 431. The hub 432 of the wheel 43 is designed to withstand greater forces, while the raised portion of the tire 431 creates a rougher contact surface, increasing friction with the ground during driving and ensuring smooth vehicle operation.

[0101] The shock-absorbing mechanism primarily comprises a crank connecting rod 41 and a hydraulic support device 42. One end of the hydraulic support device 42 is connected to the wheel, known as the wheel end; the other end is connected to the vehicle end, known as the vehicle connection end. When the hydraulic support device is subjected to rapid pressure at both ends, the internal hydraulic structure provides vibration reduction. The crank connecting rod 41 is connected to the hydraulic support device 42 at both ends, providing added strength between the two ends of the hydraulic support device.

[0102] Generally, the crank connecting rod 41 is provided on both sides of the hydraulic support device 42 to perform work on both sides respectively.

[0103] See Figure 23 , Figure 23 A schematic diagram of the structure of a crank-connecting rod provided in an embodiment of the present invention. The crank-connecting rod 41 mainly includes a triangular bracket 411 and a straight shaft 412, wherein the tip portion of the triangular bracket 411 is rotatably connected to one end of the straight shaft 412, and both open ends of the triangular bracket 411 abut against the vehicle-connected end of the hydraulic support device 42, and in the abutting state, the triangular bracket 411 is allowed to rotate around this end. Similarly, the other end of the straight shaft 412 is connected to the wheel end of the hydraulic support device 42, so that the straight shaft 412, the triangular bracket 411 and the hydraulic support device 42 form an articulated triangular structure. Since the hydraulic support device 42 is telescopically deformable, the angle between the straight shaft 412 and the triangular bracket 411 will change accordingly.

[0104] The hydraulic support device 42 is typically provided with a cylinder at the vehicle-connected end, while the open ends of the triangular bracket 411 each have semicircular grooves to engage the cylinder. In this case, the semicircular grooves and the cylinder can be merely in abutment with each other, allowing for relative rotation to accommodate changes in the angle between the triangular bracket 411 and the linear axis 412. When two crank connecting rods 41 are provided, the triangular brackets 411 of each crank connecting rod 41 can each support a different side of the cylinder. Alternatively, the open ends of the triangular bracket 411 can be fixed to the cylinder at the vehicle-connected end, while the cylinder can rotate about its own axis.

[0105] The hydraulic structure of the hydraulic support device 42 may also be provided with a pressure regulating device to actively control the distance between the two ends of the hydraulic support device to actively control the height position of the vehicle end to improve driving stability.

[0106] See Figure 24 , Figure 24A schematic diagram of the structure of a hydraulic support device provided in an embodiment of the present invention. The hydraulic support device primarily comprises a hydraulic structure 421 and a fork 422. The cylinder is provided at one end of the hydraulic structure, and the other end is connected to the fork 422 and the linear axis 412. The fork 422 forms two support rods located on either side of the wheel, and the lower ends of the two support rods are connected to the ends of the wheel axle.

[0107] See Figure 25 , Figure 25 This is a schematic diagram of the power system provided in an embodiment of the present invention. The power system is located at the vehicle end and can be installed only at the rear end, the front end, or both. The power system for driving the wheels primarily includes a motor 51 and a power transmission system 52. Motor 51 provides power.

[0108] See Figure 26 , Figure 26 The power transmission system provided in the embodiment of the present invention is a schematic structural diagram, wherein the power transmission system mainly includes a universal joint 521, a universal joint telescopic rod 522, a gear transmission assembly 523 and a transmission shaft 524 which are sequentially connected in transmission.

[0109] See Figure 27 , Figure 27 A schematic diagram of the structure of a gear transmission assembly provided in an embodiment of the present invention. The gear transmission assembly 523 includes a large bevel gear 5231 and a small bevel gear 5232, wherein the large bevel gear 5231 and the small bevel gear 5232 are meshed. Power can be transmitted to the small bevel gear 5232 via a universal joint 521 and a universal joint telescopic rod 522, causing it to move. The small bevel gear 5232 then transmits power to the large bevel gear 5231 via gear transmission, causing it to move, while simultaneously driving the external drive shaft 524 to move, thereby driving the wheel 43. The universal joint telescopic mechanism enables the telescopic movement of the wheel 43 and the power transmission system to ensure power transmission.

[0110] Of course, a general power system can also be used to be directly installed on the wheels, such as the wheels can directly use hub motors.

[0111] In some embodiments, this embodiment provides a retractable portable transport vehicle. This portable transport vehicle can change its longitudinal length and height while maintaining the same lateral width, and can freely adjust the space inside the transport vehicle body according to the size of the cargo being transported, thereby improving the space utilization and transportation efficiency of the vehicle's cargo transportation. During transportation, the vehicle can have two states: empty and loaded. When the vehicle is empty, the vehicle is in a retracted state, with the center of gravity located at a lower position in the center of the vehicle body, and it takes up less space when traveling on the road. When the vehicle is loaded, the retractable mechanism of the transport vehicle will adjust to the appropriate position according to the quantity and weight of the cargo, maximizing the utilization of the vehicle compartment volume.

[0112] In some embodiments, the telescopic transport vehicle may be further provided with a central control system to control the automatic extension and retraction of the telescopic transport vehicle.

[0113] See Figure 28 , Figure 28 A schematic diagram of the central control system provided by an embodiment of the invention. The central control system includes a central processing unit 61, external interactive buttons 62, and a display screen 63. The operator first inputs the desired extension length and height of the vehicle body through the external interactive buttons 62. This data is then transmitted to the central processing unit 61. After processing the data, the central processing unit 61 sends signals to various controllers within the vehicle body to control the operation of the various internal extension mechanisms. All relevant operating data is displayed in real time on the display screen 63.

[0114] See Figure 29 , Figure 29 This is a flowchart of the overall operation of the retractable vehicle provided by an embodiment of the present invention. The vehicle has two main operating modes: an unloaded mode and a loaded mode. Input for these two modes can be achieved through detection by some detectors or manual input.

[0115] After the vehicle begins operating, the vehicle's operating mode, or state, is first determined. If the vehicle is unloaded, the telescopic mechanism is adjusted to its minimum size, simultaneously minimizing both the vehicle's length and height. The vehicle then travels on the road in its smallest, most maneuverable form, and in this lightweight state, travels to its loading location. When loading, the owner can first estimate the volume of cargo to be carried and the required compartment space. The height and length of the compartment are then adjusted using the telescopic columns 13 and the slotted telescopic mechanism 233 of the bottom telescopic platform 2. The platform lifting mechanism 34 then extends the corresponding number of stacked telescopic platforms based on the number of platforms selected, ultimately completing the telescopic and retractable operation of the vehicle. Once the vehicle is fully extended, the bottom telescopic panel assembly can be retracted, allowing the inner or outer panels to slide to open the doors and allow cargo to be loaded from the side. Once cargo is loaded, the bottom telescopic panel assembly can be extended, allowing the inner or outer panels to slide to close the doors, sealing the telescopic shell and creating a sealed environment to ensure safe cargo transportation.

[0116] See Figure 30 , Figure 30 This is a flowchart of the telescopic drive system for a telescopic platform according to an embodiment of the present invention. The telescopic mechanism consists of six telescopic units 22 stacked front to back. Each telescopic unit 22 includes a motor 2251 and a hydraulic pump 2226 to achieve extension of the telescopic platform. The motor 2251 drives the crankshaft-connecting rod mechanism 2252, converting the crankshaft's circular motion into linear motion of the piston 2253, thereby achieving the first telescopic mode. The hydraulic pump 2226 drives the parallel movement of the rack plate 2223, driving the gear 2224 meshing with the rack to rotate along a fixed axis. Simultaneously, one end of the connecting rod 2225 rotates along a fixed axis about the axis of the gear 2224, extending the built-in second base plate 2222 forward and driving the first and second nested boxes 2227 and 2228 to unfold layer by layer, thus achieving the second telescopic mode. The combination of these two telescopic modes completes the final platform extension. During the extension process, the parameters of all motors 2251 and hydraulic pumps 2226 can be kept identical, achieving synchronous extension of the six telescopic units 22. In practice, to ensure the stability of the overall mechanism, the first telescopic method is primarily used, supplemented by the second. During operation, telescopic length data is first transmitted to the central control system, which then determines whether to use one or both telescopic methods. If the second telescopic method is used, the central processor converts the length data into the horizontal movement distance of the hydraulic pump 2226 and the angular displacement of the connecting rod 2225, achieving quantitative extension of the built-in telescopic mechanism.

[0117] See Figure 31 , Figure 31This is a flowchart of the internal platform vertical telescopic mechanism according to an embodiment of the present invention. First, the motor drives the top column 132 upward, simultaneously moving the internal telescopic platform 3 upward. When the desired height is reached, the telescopic rod is securely fastened. Then, the folding telescopic rod, or platform lifting mechanism 34, is extended downward and secured when the desired height is reached. Next, the two stacked internal telescopic platforms adaptively adjust to the desired height. Finally, the stacked internal telescopic platforms extend horizontally using the bottom telescopic mechanism, forming the final layered transport compartment.

[0118] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0119] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic transport vehicle, comprising a first vehicle end, a second vehicle end, and a telescopic body, wherein longitudinal ends of the telescopic body are respectively connected to the first vehicle end and the second vehicle end, characterized in that: The telescopic body includes a telescopic platform and a vehicle shell telescopic assembly that can be synchronously extended and retracted longitudinally, the telescopic platform is located in the vehicle shell telescopic assembly; the vehicle shell telescopic assembly includes a telescopic vehicle shell that can be extended and retracted in the up-down and fore-and-aft directions, a telescopic column for driving the telescopic vehicle shell to extend and retract in the up-down direction, and a telescopic frame that can follow the telescopic vehicle shell to extend and retract in the fore-and-aft direction; the telescopic platform includes a telescopic platform, the telescopic platform includes a nested box structure and a frame-type telescopic mechanism for driving the nested box structure to extend and retract, the frame-type telescopic mechanism includes a first base plate, a second base plate and four connecting rods, every two connecting rods form a connecting rod group, and the two connecting rods of the connecting rod group are hingedly connected, and the two ends of the connecting rod group are hingedly connected to the first base plate and the second base plate respectively; the telescopic platform also includes a rack plate and a telescopic drive mechanism, the rack plate is slidably matched with the first base plate or the second base plate, and the two ends of the rack plate have racks facing opposite directions to respectively engage with the gears on the connecting rods at the two ends of the base plate, so as to drive the connecting rods at both ends to rotate in opposite directions when sliding to achieve telescopic drive; The telescopic vehicle shell includes a top telescopic shell group and a bottom telescopic shell group that can move relative to each other in the up and down directions; the bottom telescopic shell group includes a bottom telescopic plate group and a bottom slide, and the bottom telescopic plate group is formed by the bottom outer plate and the bottom inner plate; the top telescopic shell group includes a top telescopic plate group and a top slide, and the top telescopic plate group is formed by the top outer plate and the top inner plate; the bottom slides arranged at the longitudinal ends and the longitudinal middle of the bottom telescopic shell group respectively slide up and down with the top slides arranged at the longitudinal ends and the longitudinal middle of the top telescopic shell group; the platform lifting device and the top telescopic shell group are both installed on the top column of the telescopic column to be driven to rise and fall by the telescopic column.

2. The telescopic transport vehicle according to claim 1, characterized in that: The telescopic platform further comprises a base platform and a platform pushing device; the base platform has a cavity for accommodating the telescopic platform in a retracted state; the platform pushing device is installed on the base platform for pushing the telescopic platform out.

3. The telescopic transporter according to claim 2, characterized in that: A side roller is provided on the bottom plate at one end of the telescopic platform, and a side roller groove matching with the side roller is provided on a cavity wall corresponding to one side of the cavity.

4. The telescopic transporter according to claim 3, characterized in that: The platform pushing device includes a stepper motor, a crank-connecting rod mechanism and a piston. The crank-connecting rod mechanism is connected between the main shaft of the stepper motor and the piston to push the piston to move horizontally when the main shaft of the stepper motor rotates. The piston is connected to the bottom plate at one end of the telescopic platform.

5. The telescopic transporter according to claim 4, characterized in that: The telescopic platform includes a plurality of telescopic units connected in sequence, and each of the telescopic units includes the base platform and the telescopic platform; the telescopic platform also includes retractable slide grooves arranged on both sides of the telescopic units, and the slide grooves are used to guide the movement of the telescopic units; it also includes an angular displacement sensor for detecting the rotation angle of the connecting rod and a hydraulic numerical control device for controlling the telescopic drive degree of the telescopic drive mechanism.

6. The telescopic transport vehicle according to any one of claims 1 to 5, characterized in that: It also includes a platform lifting device, multiple telescopic platforms are arranged up and down, and the platform lifting device is used to drive at least one of the telescopic platforms to move up and down.

7. The telescopic transporter according to claim 6, characterized in that The multiple telescopic platforms include a bottom telescopic platform, a first-level superimposed telescopic platform, and a second-level superimposed telescopic platform; both ends of the bottom telescopic platform are connected to the first vehicle end and the second vehicle end respectively; the first-level superimposed telescopic platform and the second-level superimposed telescopic platform are both installed on the internal lifting mechanism through the platform lifting device.

8. The telescopic transporter according to claim 7, characterized in that: The first vehicle end and the second vehicle end are both provided with a wheel assembly, and the wheel assembly includes a wheel, a crank connecting rod and a hydraulic support device; the lower end of the hydraulic support device is connected to the wheel, and the upper end is connected to the vehicle end; the crank connecting rod includes a triangular bracket and a straight-rotating shaft, the tip part of the triangular bracket is hinged to one end of the straight-rotating shaft, the open ends of the triangular bracket are both abutted against the upper end of the hydraulic support device and can rotate relative to each other, and the other end of the straight-rotating shaft is hingedly connected to the lower end of the hydraulic support device; at least one of the first vehicle end and the second vehicle end is provided with a power system, and the power system includes a motor and a power transmission system, the motor is installed at the vehicle end, and the power transmission system mainly includes a universal joint, a universal joint telescopic rod, a gear transmission assembly and a transmission shaft that are sequentially connected in transmission, and the transmission shaft is transmission connected to the wheel.

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