Double-layer self-adaptive foldable carriage

Abstract

The utility model relates to the field of vehicle carrying boxes, in particular to a double-layer self-adaptive foldable vehicle carrying box which comprises a bottom frame and an end frame, and two fixed first-layer vehicle frames and two movable second-layer vehicle frames are arranged on the bottom frame. A chain block is arranged at the top of the end frame when the end frame is erected, a connecting piece is arranged at the output end of the chain block, the other end of the connecting piece is connected with a second cross beam placed at the tail end of the two-layer frame, the two ends of the second cross beam are slidably connected with second supporting rods hinged to the bottom frame, and the second supporting rods can be locked when being perpendicular to the bottom frame; a self-locking structure is arranged between the second cross beam and the second supporting rod, and the second cross beam is prevented from moving reversely in the lifting process. The truck carrying box can carry four trucks at the same time, the chain block is additionally arranged at the tail end of the two-layer truck frame, meanwhile, a self-locking structure is arranged, accidents caused by human factors when a forklift is driven are reduced, accidents are prevented from occurring in the process that the chain block lifts the tail end of the two-layer truck, and the safety of loading and transportation is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of vehicle transport boxes, in particular to a double-layer self-adaptive foldable vehicle transport box. Background Art

[0002] At present, most of the 40-foot car transport boxes on the market are used to carry three cars. One end of the car transport frame is hinged and fixed, and the other end is adjusted up and down. When the vehicle enters the car transport frame, the car transport frame slide rod is adjusted with a forklift to make the car transport frame in an inclined position to save space. The above operation process is complicated and laborious; and the number of cars to be transported is limited, and the space utilization rate of the frame is too low. Utility Model Content

[0003] The utility model aims to provide a double-layer self-adaptive foldable vehicle transport box to solve the problems raised by the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer adaptive foldable vehicle transport box, comprising a base frame and end frames connected to the base frame at both ends along the length direction through a hinge device, the base frame is provided with two first-layer frames and two second-layer frames, the two first-layer frames are symmetrically fixed to the base frame, and the two second-layer frames are symmetrically and movably arranged on the base frame;

[0005] A hand chain hoist is arranged on the top of the end frame when it is erected, a connecting piece is arranged at the output end of the hand chain hoist, the other end of the connecting piece is connected to a second crossbeam, and the second crossbeam is placed under the tail end of the second-layer frame for lifting the tail end of the second-layer frame;

[0006] Both ends of the second cross beam are slidably connected to second support rods, one end of the second support rod is hinged to the base frame and can be locked when vertical to the base frame; a self-locking structure is arranged between the second cross beam and the second support rod, and during the process of the hand winch lifting the second cross beam through the connecting piece, the self-locking structure can prevent the second cross beam from moving in the opposite direction.

[0007] The beneficial effects of the utility model are as follows: the utility model uses a standard foldable container, and a fixed first-layer frame and a movable second-layer frame are respectively arranged above the bottom frame to form a vehicle transport box that can carry vehicles at the same time, thereby improving the space utilization rate of the entire vehicle transport box; and a hand chain hoist is added at the rear end of the second-layer frame to replace the original forklift lifting method, thereby reducing accidents caused by human factors when driving a forklift, and is equipped with a self-locking structure to prevent accidents from occurring during the process of the hand chain hoist lifting the rear end of the second layer, thereby enhancing the safety of loading and transportation.

[0008] Preferably, the front end of the two-layer frame is provided with a first crossbeam through a hoop structure, and the two ends of the first crossbeam are slidably connected to the first support rod; the two ends of the first crossbeam are respectively provided with first sleeves, and the first sleeves are respectively sleeved on the corresponding first support rods; the first support rod is provided with a plurality of axially evenly distributed mounting holes, and the first crossbeam can be fixed to different positions on the first support rod by setting a latch through the mounting holes and the first sleeve; one end of the first support rod is hinged to the base frame and can be locked when perpendicular to the base frame. Thus, the front end of the two-layer frame can be lifted and fixed by the first crossbeam and the first support rod.

[0009] Preferably, there is a set of the first support rod and the second support rod on both sides of the two-layer frame, and the hinge structure of the end of the second support rod on the same side is the same as the hinge structure of the end of the first support rod and is symmetrical about the center of the connecting line, so that the first support rod and the second support rod can rotate towards each other and be folded on the bottom frame or perpendicular to the bottom frame through the hinge structure. Therefore, in order to meet the requirements of foldable transportation, the first support rod at the front end of the two-layer frame and the second support rod at the rear end are provided with the same and symmetrical hinge structure.

[0010] Preferably, the hinge structure includes a hinge seat arranged on the base frame, a right-angled limiting plate arranged on the ends of the first support rod and the second support rod, and a limiting hole arranged on the hinge seat, and the ends are hinged to the corresponding hinge seat through a rotating shaft; when the first support rod and the second support rod rotate to be perpendicular to the base frame, the first support rod and the second support rod are stopped at the current position by the limiting plate, and the first support rod and the second support rod can be locked with the hinge seat by setting a latch passing through the ends; when the first support rod and the second support rod rotate to be folded on the base frame, the first support rod and the second support rod can be locked by setting a latch passing through the limiting hole. Therefore, the hinges of the first support rod and the second support rod are both provided with corresponding structures to meet the position states of erection and folding.

[0011] Preferably, the two ends of the second crossbeam are respectively provided with second sleeves, and the second sleeves are respectively sleeved on the corresponding second support rods; the second support rods are provided with a plurality of axially evenly distributed mounting holes, and after the second crossbeam is lifted to a suitable position, a latch can be provided to pass through the mounting holes and the second sleeves to fix the second crossbeam at the current position. Thus, a connection method between the second crossbeam and the second support rod is provided, so as to realize the lifting and fixing of the two-layer frame.

[0012] Preferably, a limiting tube is sleeved on the second sleeve, and the limiting tube can rotate around the outer surface of the second sleeve. The limiting tube and the second sleeve can be relatively fixed by arranging an indexing pin; a limiting column is arranged on the limiting tube, and when the limiting tube is relatively fixed, the limiting column and the second cross beam clamp the rear end of the second-layer frame in the middle to prevent the rear end of the second-layer frame from moving up and down when the vehicle transport box is bumpy.

[0013] Preferably, the self-locking structure comprises a first ratchet disposed inside the second sleeve and a second ratchet disposed outside the second support rod, the first ratchet and the second ratchet cooperate with each other; the first ratchet and the second ratchet both comprise an arc surface and a straight surface, the arc surfaces of the first ratchet and the second ratchet are opposite, and the straight surfaces are opposite, so that when the first ratchet and the second ratchet cooperate to move, the second sleeve can only move in one direction. Thus, a self-locking structure formed by the mutual cooperation between the ratchet teeth is provided.

[0014] Preferably, a plurality of the second ratchets are axially arranged on the outer surface of the second support rod, a mounting plate is arranged on the inner side of the second sleeve, a plurality of the first ratchets are arranged on one side of the mounting plate, a push rod perpendicular to the mounting plate is arranged on the other side of the mounting plate, the end of the push rod passes through the second sleeve, a locking hole is arranged on the push rod, and the locking hole can be locked by a cotter pin. Thus, the arrangement scheme of the ratchets is refined, and the distance between the first ratchets and the second ratchets is controlled by controlling the push rod, so that during the lifting process of the tail end of the second-layer frame, the first ratchets are stabilized and self-locked with the second ratchets; or when the second-layer frame is removed, the first ratchets and the second ratchets are moved away from each other, so that the second crossbeam can descend along the second support rod and then unload the vehicle and fold the second support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view of an embodiment of the utility model (excluding the second ratchet tooth);

[0016] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure (except for lifting parts such as hand hoists);

[0017] Figure 3 yes Figure 2 A magnified schematic diagram of part B;

[0018] Figure 4 yes Figure 2 A magnified schematic diagram of part C;

[0019] Figure 5 yes Figure 2 A magnified schematic diagram of part A;

[0020] Figure 6 It is a brief schematic diagram of an embodiment of the self-locking structure in the utility model (unlocked state);

[0021] Figure 7 It is a brief schematic diagram of an embodiment of the self-locking structure in the utility model (activated state). DETAILED DESCRIPTION

[0022] A general vehicle transport box includes a base frame 1 and end frames 2 connected to the base frame 1 at both ends along the length direction by hinge devices, and the end frames 2 can be erected or folded relative to the base frame 1. When the end frames 2 are erected, vehicles can be loaded inside the vehicle transport box for transportation; when the end frames 2 are folded, the entire vehicle transport box is returned as an empty box.

[0023] In the embodiment of the utility model, the double-layer adaptive foldable car transport box is shown in FIG. Figure 1-5 Two first-layer frames 3 and two second-layer frames 4 are arranged on the chassis 1. The two first-layer frames 3 are symmetrically fixed to the chassis 1, and the two second-layer frames 4 are symmetrically movably arranged on the chassis 1. The first-layer frame 3 includes two parallel lanes welded to the chassis 1, and a plurality of anti-skid holes are arranged on the lanes. The lanes are used to directly contact with the tires of the car, and the wheels are fixed by passing the binding belts through the anti-skid holes.

[0024] The end frame 2 includes two parallel columns 21 and a crossbeam 22 welded to one end of the column 21, and the other end of the column 21 is welded to a hinge device. A hand chain hoist 23 is arranged on the top of the end frame 2 when it is erected, that is, the hand chain hoist 23 is hung on the crossbeam 22. The hand chain hoist 23 includes an operating end and an output end. The operating end is a hand chain 24, which is directly operated by a person. When the hand chain 24 is pulled clockwise, the output end is raised; when the hand chain 24 is pulled counterclockwise, the output end is lowered. A connecting member 25 is arranged at the output end of the hand chain hoist 23, and the other end of the connecting member 25 is connected to a second crossbeam 51. In this embodiment, the connecting member 25 is a steel wire rope, and the end of the steel wire rope is directly wound around the second crossbeam 51, so that the movement of the second crossbeam 51 is synchronized with the operation of the hand chain hoist 23 through the steel wire rope. When two hand chain hoists 23 are provided and the two are respectively close to the column 21 , a mounting seat and a fixed pulley 26 can be welded on the column 21 , and the fixed pulley 26 is used to assist in guiding the wire rope.

[0025] Since the second-layer frame 4 is a movable frame and needs to be vacated above the first-layer frame 3 when loading vehicles, the second-layer frame 4 itself needs to have a frame body, which is used to weld the lane with anti-skid holes to load and fix the vehicle; secondly, some supporting structures can be used to cooperate with the frame body and the entire second-layer frame 4 to thereby lift and fix the second-layer frame 4.

[0026] Generally, the head of the vehicle is lower than the middle and tail, and in this embodiment, the vehicles on the first-layer frame 3 are parked head to head, so when the second-layer frame 4 is loaded with vehicles, the vehicles on the second-layer frame 4 need to be parked tail to tail, so that the highest height of the vehicle on the second-layer frame 4 is not higher than the height of the entire vehicle transport box. Based on the above loading, in this embodiment, the second-layer frame 4 has an end close to the tail of the vehicle as the front end, and an end close to the head of the vehicle as the tail end.

[0027] The front end of the second-layer frame 4 is fixed with a first crossbeam 41 through four hoop structures 43. The first crossbeam 41 is cylindrical. The hoop structure 43 wraps the first crossbeam 41 and is locked by bolts 93, so that the first crossbeam 41 is rotatably fixed to the front end of the frame of the second-layer frame 4. In this embodiment, a first support rod 6 is used as a support structure at the front end of the second-layer frame 4. The first support rod 6 is cylindrical or cylindrical in shape as a whole, one end of which is hinged to the base frame 1 and can be locked when it is vertical to the base frame 1. First sleeves 42 are welded to both ends of the first crossbeam 41, and the first sleeves 42 are respectively sleeved on one first support rod 6, that is, two first support rods 6 are respectively arranged on both sides of the front end of the second-layer frame 4, and both ends of the first crossbeam 41 can be slidably connected to the first support rod 6. The first support rod 6 is provided with a plurality of mounting holes 92 evenly distributed in the axial direction, and the first crossbeam 41 can be fixed at different positions on the first support rod 6 by setting a latch 91 passing through the mounting holes 92 and the first sleeve 42, that is, when the first support rod 6 is erected, the height of the front end of the second-layer frame 4 can be adjusted as needed. Based on the above structure, the front end of the second-layer frame 4 can be raised, lowered and fixed by the cooperation between the first crossbeam 41 and the first support rod 6.

[0028] The second crossbeam 51 is placed below the tail end of the second-layer frame 4 and directly contacts the frame body, and is used to lift and lower the tail end of the second-layer frame 4. In this embodiment, the second support rod 5 is used as the support structure of the tail end of the second-layer frame 4, and the length of the second support rod 5 is greater than the first support rod 6. The second support rod 5 is cylindrical or cylindrical in shape as a whole, and one end is hinged to the base frame 1, and can be locked when it is vertical to the base frame 1. The second crossbeam 51 is welded with a second sleeve 52 at both ends, and the second sleeve 52 is respectively sleeved on a second support rod 5, that is, two second support rods 5 are respectively arranged on both sides of the tail end of the second-layer frame 4, and both ends of the second crossbeam 51 can be slidably connected to the second support rod 5. The second support rod 5 is provided with a plurality of axially evenly distributed mounting holes 92. After the second crossbeam 51 is lifted to a suitable position by the hand winch 23, the second crossbeam 51 can be fixed at the current position by setting a latch 91 to pass through the mounting hole 92 and the second sleeve 52. The second sleeve 52 is sleeved with a limit tube 53, which can rotate around the outer surface of the second sleeve 52. The limit tube 53 and the second sleeve 52 can be relatively fixed by setting a dividing pin 55. A limit column 54 is set on the limit tube 53. When the limit tube 53 is relatively fixed, the limit column 54 and the second crossbeam 51 sandwich the tail end of the second-layer frame 4 in the middle to prevent the tail end of the second-layer frame 4 from moving up and down when the transport box is bumpy. When the second support rod 5 is erected, two baffles 56 are set on the upper side of the second crossbeam 51, which are respectively located at the two ends of the second crossbeam 51. When the second-layer frame 4 is mounted on the second crossbeam 51, the two baffles 56 are located on the left and right sides of the tail end of the second-layer frame 4 to limit the lateral movement of the tail end.

[0029] Based on the above structure, the tail end of the second-layer frame 4 can be lifted and fixed by the cooperation between the second crossbeam 51 and the second support rod 5. A self-locking structure 7 is also provided between the second crossbeam 51 and the second support rod 5. When the hand winch 23 lifts the second crossbeam 51 through the connecting piece 25, the self-locking structure 7 can prevent the second crossbeam 51 from moving in the opposite direction. The self-locking structure 7 includes a first ratchet 71 provided on the inner side of the second sleeve 52 and a second ratchet 72 provided on the outer side of the second support rod 5. The first ratchet 71 and the second ratchet 72 cooperate with each other: the first ratchet 71 and the second ratchet 72 both include an arc surface and a straight surface. The arc surfaces of the first ratchet 71 and the second ratchet 72 are opposite to each other, and the straight surfaces are opposite to each other, so that when the first ratchet 71 and the second ratchet 72 cooperate to move, the second sleeve 52 can only move in one direction.

[0030] Specifically, a plurality of second ratchet teeth 72 are axially welded on the outer surface of the second support rod 5, a mounting plate 73 is provided on the inner side of the second sleeve 52, the mounting plate 73 is in a strip shape, a plurality of first ratchet teeth 71 are welded on one side of the mounting plate 73, a push rod 74 perpendicular to the mounting plate 73 is welded on the other side of the mounting plate 73, the end of the push rod 74 passes through the second sleeve 52, and the insertion degree of the push rod 74 can be manually operated. The push rod 74 is provided with two locking holes distributed along the axial direction of the push rod 74, and the cotter pin 94 can pass through the locking holes.

[0031] When the first ratchet tooth 71 and the second ratchet tooth 72 are fully matched, the push rod 74 enters the second sleeve 52 to the maximum extent. At this time, the locking hole that is exactly located in the internal space of the second sleeve 52 and close to the inner wall of the second sleeve 52 is found. The locking hole is fixed by the cotter pin 94, so that the push rod 74 and the first ratchet tooth 71 can be fixed, and the second sleeve 52 and the second support rod 5 form a self-locking structure 7; when the first ratchet tooth 71 and the second ratchet tooth 72 are completely staggered and do not contact, the push rod 74 pulls out the second sleeve 52 to the maximum extent. At this time, the mounting plate 73 is close to the inner wall of the second sleeve 52, and the locking hole that is exactly located on the outside of the second sleeve 52 and close to the outer surface of the second sleeve 52 is found. The locking hole is fixed by the cotter pin 94, so that the push rod 74 and the first ratchet tooth 71 can be fixed, and the second sleeve 52 and the second support rod 5 release the self-locking structure 7.

[0032] The above structure refines the setting scheme of the ratchet. By controlling the push rod 74, the distance between the first ratchet 71 and the second ratchet 72 is controlled, so that during the lifting process of the tail end of the second-layer frame 4, the first ratchet 71 is stabilized and self-locked with the second ratchet 72; or when the second-layer frame 4 is removed, the first ratchet 71 and the second ratchet 72 are moved away from each other, so that the second crossbeam 51 can descend along the second support rod 5 to unload the vehicle and fold the second support rod 5.

[0033] To meet the needs of foldable transportation, the first support rod 6 at the front end of the second-layer frame 4 and the second support rod 5 at the rear end are provided with the same and symmetrical hinge structure, so that the first support rod 6 and the second support rod 5 can rotate towards each other and be folded on the base frame 1 or perpendicular to the base frame 1 through the hinge structure 8.

[0034] There is a set of first support rods 6 and second support rods 5 on both sides of the second-layer frame 4, respectively. The hinge structure 8 at the end of the second support rod 5 on the same side is the same as the hinge structure 8 at the end of the first support rod 6 and is symmetrical about the center of the connecting line. The hinge structure 8 includes a hinge seat 81 welded to the base frame 1, a right-angled limit plate 83 welded to the ends of the first support rod 6 and the second support rod 5, and a limit hole 84 opened in the hinge seat 81. The ends of the first support rod 6 and the second support rod 5 are welded with additional hinge parts, which are protruding from the original shape and are hinged to the corresponding hinge seat 81 through a rotating shaft 82, that is, the axis of the rotating shaft 82 is staggered with the axis of the first support rod 6 and the second support rod 5, and the limit hole 84 is just set above the rotating shaft 82.

[0035] When the first support rod 6 and the second support rod 5 rotate to be perpendicular to the base frame 1, the first support rod 6 and the second support rod 5 stop at the current position due to the action of the limiting plate 83, and the first support rod 6 and the second support rod 5 can be locked by setting a pin 91 passing through the end and the hinge seat 81.

[0036] When the first support rod 6 and the second support rod 5 rotate to be folded on the bottom frame 1, the first support rod 6 and the second support rod 5 can be locked by setting a latch 91 through the limit hole 84. At this time, the first crossbeam 41 is separated from the first support rod 6 and is placed above the bottom frame 1 along with the second-layer frame 4; the second crossbeam 51 falls to the lowest end of the second support rod 5 and is folded along with the second support rod 5 on the bottom frame 1. At the same time, the connection between the connector 25 and the second crossbeam 51 can be removed, and it needs to be reconnected when the vehicle transport box is reactivated; or the connector 25 of a suitable length is released to meet the needs of folding and loading, and it does not need to be removed.

[0037] Through the above structure, the process of loading the vehicle in this embodiment is as follows:

[0038] 1. Open the end frame 2 folded on the base frame 1 in a conventional manner, so that the end frame 2 stands upright and forms a loading space for the vehicle transport box.

[0039] 2. Erect and fix the first support rod 6. At this time, the first crossbeam 41 and the front end of the second-layer frame 4 are placed at the lowest end of the first support rod 6; erect and fix the second support rod 5. At this time, the second crossbeam 51 is placed at the lowest end of the second support rod 5, and at the same time, it is placed below the rear end of the second-layer frame 4.

[0040] 3. Lift the front end of the second-layer frame 4: According to the pre-estimation, the first crossbeam 41 is fixed to the appropriate position of the first support rod 6 by the latch 91, so as to fix the front end of the second-layer frame 4.

[0041] 4. The vehicle drives into the second-layer frame 4 and fixes the vehicle to the second-layer frame 4.

[0042] 5. Lift the rear end of the second-layer frame 4: activate the self-locking structure 7, and manually operate the hand chain hoist 23 to gradually lift the second crossbeam 51 and the rear end of the second-layer frame 4 to a suitable height, fix the second crossbeam 51 to the second support rod 5 through the pin 91, rotate and lock the limit tube 53, and fix the rear end of the second-layer frame 4.

[0043] 6. The vehicle drives into a layer of vehicle frame 3, and the vehicle is fixed to the layer of vehicle frame 3.

[0044] When unloading a vehicle and folding the transport box, the specific process is as follows:

[0045] 1. Release the fixation of the vehicle frame 3 on one layer and the vehicle on it, and drive the vehicle out of this layer.

[0046] 2. Lower the rear end of the second-layer frame 4: unlock the limit tube 53 so that the limit column 54 rotates to the other side; release the latch connection between the second crossbeam 51 and the second support rod 5; release the self-locking structure 7, and manually operate the hand chain hoist 23 in reverse so that the second crossbeam 51 and the rear end of the second-layer frame 4 gradually descend to the lowest end.

[0047] 3. Release the fixation of the second-layer frame 4 and the vehicle thereon, and drive out the vehicle on this layer.

[0048] 4. Lower the front end of the second-layer frame 4: Unlock the latch connection between the first crossbeam 41 and the first support rod 6, and lower the first crossbeam 41 and the front end of the second-layer frame 4 to the lowest end of the first support rod 6, and stack the second-layer frame 4 on top of the first-layer frame 3 and fix it.

[0049] 5. Remove the latch 91 in the hinge structure 8, fold the first support rod 6 and the second support rod 5, and then use the latch 91 to lock the limiting hole 84.

[0050] 6. Fold the end frame 2 onto the base frame 1 to complete the folding of the entire vehicle transport box.

[0051] In summary, the utility model uses a standard 40-foot foldable container, and respectively arranges a fixed first-layer frame 3 and a movable second-layer frame 4 above the bottom frame 1, so as to form a vehicle transport box that can carry 4 vehicles at the same time, thereby improving the space utilization rate of the entire vehicle transport box; and a hand winch 23 is added to the tail end of the second-layer frame 4 to replace the original forklift lifting method, thereby reducing accidents caused by human factors when driving a forklift, and is equipped with a self-locking structure 7 to prevent accidents from occurring during the process of the hand winch 23 lifting the tail end of the second layer, thereby enhancing the safety of loading and transportation.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer adaptive foldable vehicle transport box, comprising a base frame (1) and end frames (2) connected to the base frame (1) at both ends along the length direction by hinge devices, characterized in that: The base frame (1) is provided with two first-layer vehicle frames (3) and two second-layer vehicle frames (4), the two first-layer vehicle frames (3) are symmetrically fixed to the base frame (1), and the two second-layer vehicle frames (4) are symmetrically and movably arranged on the base frame (1); A hand chain hoist (23) is arranged on the top of the end frame (2) when it is erected, a connecting piece (25) is arranged at the output end of the hand chain hoist (23), the other end of the connecting piece (25) is connected to a second cross beam (51), and the second cross beam (51) is placed below the rear end of the second-layer frame (4) for lifting the rear end of the second-layer frame (4); The two ends of the second cross beam (51) are slidably connected to the second support rod (5), one end of the second support rod (5) is hinged to the base frame (1) and can be locked when it is perpendicular to the base frame (1); a self-locking structure (7) is provided between the second cross beam (51) and the second support rod (5), and when the hand winch (23) lifts the second cross beam (51) through the connecting piece (25), the self-locking structure (7) can prevent the second cross beam (51) from moving in the opposite direction.

2. The vehicle transport box according to claim 1, characterized in that: The front end of the two-layer frame (4) is provided with a first crossbeam (41) through a clamp structure (43), and the two ends of the first crossbeam (41) are slidably connected to the first support rod (6); the two ends of the first crossbeam (41) are respectively provided with first sleeves (42), and the first sleeves (42) are respectively sleeved on the corresponding first support rods (6); the first support rod (6) is provided with a plurality of axially evenly distributed mounting holes (92), and the first crossbeam (41) can be fixed to different positions on the first support rod (6) by arranging a latch (91) to pass through the mounting holes (92) and the first sleeves (42); one end of the first support rod (6) is hinged to the base frame (1) and can be locked when it is perpendicular to the base frame (1).

3. The vehicle transport box according to claim 2, characterized in that: A group of the first support rod (6) and the second support rod (5) are respectively provided on both sides of the two-layer frame (4); the hinge structure (8) at the end of the second support rod (5) on the same side is identical to the hinge structure (8) at the end of the first support rod (6) and is symmetrical about the center of the connecting line, so that the first support rod (6) and the second support rod (5) can rotate towards each other and be folded onto the base frame (1) or perpendicular to the base frame (1) through the hinge structure (8).

4. The vehicle transport box according to claim 3, characterized in that: The hinge structure (8) comprises an articulated seat (81) arranged on the base frame (1), a right-angled limiting plate (83) arranged on the ends of the first support rod (6) and the second support rod (5), and a limiting hole (84) arranged on the articulated seat (81), and the ends are both hinged to the corresponding articulated seat (81) through a rotating shaft (82); when the first support rod (6) and the second support rod (5) are rotated to be perpendicular to the base frame (1), the first support rod (6) and the second support rod (5) are stopped at the current position by the action of the limiting plate (83), and the first support rod (6) and the second support rod (5) can be locked with the articulated seat (81) by arranging a latch (91) passing through the ends; when the first support rod (6) and the second support rod (5) are rotated to be folded on the base frame (1), the first support rod (6) and the second support rod (5) can be locked by arranging a latch (91) passing through the limiting hole (84).

5. The vehicle transport box according to claim 1, characterized in that: The two ends of the second crossbeam (51) are respectively provided with second sleeves (52), and the second sleeves (52) are respectively sleeved on the corresponding second support rods (5); the second support rods (5) are provided with a plurality of axially evenly distributed mounting holes (92), and after the second crossbeam (51) is lifted to a suitable position, a latch (91) can be provided to pass through the mounting holes (92) and the second sleeves (52), so as to fix the second crossbeam (51) at the current position.

6. The vehicle transport box according to claim 5, characterized in that: A limiting tube (53) is sleeved on the second sleeve (52), and the limiting tube (53) can rotate around the outer surface of the second sleeve (52). The limiting tube (53) and the second sleeve (52) can be relatively fixed by arranging a dividing pin (55); a limiting column (54) is arranged on the limiting tube (53), and when the limiting tube (53) is relatively fixed, the limiting column (54) and the second cross beam (51) sandwich the rear end of the second-layer frame (4) in the middle, so as to prevent the rear end of the second-layer frame (4) from moving up and down when the vehicle transport box is bumpy.

7. The vehicle transport box according to claim 5, characterized in that: The self-locking structure (7) comprises a first ratchet (71) arranged on the inner side of the second sleeve (52) and a second ratchet (72) arranged on the outer side of the second support rod (5), the first ratchet (71) and the second ratchet (72) cooperating with each other; the first ratchet (71) and the second ratchet (72) both comprise an arc surface and a straight surface, the arc surfaces of the first ratchet (71) and the second ratchet (72) are opposite to each other, and the straight surfaces are opposite to each other, so that when the first ratchet (71) and the second ratchet (72) move in coordination, the second sleeve (52) can only move in one direction.

8. The vehicle transport box according to claim 7, characterized in that: A plurality of second ratchet teeth (72) are axially arranged on the outer surface of the second support rod (5), a mounting plate (73) is arranged on the inner side of the second sleeve (52), a plurality of first ratchet teeth (71) are arranged on one side of the mounting plate (73), a push rod (74) perpendicular to the mounting plate (73) is arranged on the other side of the mounting plate (73), the end of the push rod (74) passes through the second sleeve (52), and a locking hole is arranged on the push rod (74), and the locking hole can be locked by a cotter pin (94).

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