Liftable trailer device

Abstract

The application provides a liftable trailer device and belongs to the technical field of trailer devices.The application comprises a vehicle frame, a jack, a trailer hook arranged on the vehicle frame and a wheel; the vehicle frame is provided with a lifting mechanism, a movable tray mechanism, an axle assembly and a hydraulic lifting mechanism; the lifting mechanism comprises a lifting hook and a lifting base, and the movable tray mechanism is arranged between the adjacent lifting hook and lifting base; the axle assembly comprises a bracket base rotatably connected to the vehicle frame and a bracket connected to the wheel through an axle; and the hydraulic lifting mechanism comprises a hydraulic support rod bracket rotatably connected to the vehicle frame and a hydraulic support rod arranged on the hydraulic support rod bracket.The application lifts and lowers the towed vehicle by controlling the lifting of the vehicle frame, fixes the towed vehicle firmly by using the movable tray mechanism, improves the safety and stability of the trailer and ensures the completion of the trailer work.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of trailer devices, and in particular to a liftable trailer device. BACKGROUND

[0002] With the increasing number of cars, a large number of vehicles are towed, which supports the trailer service market. When the vehicle is in use, it may not be able to move on its own due to some faults, and some off-road vehicles cannot directly travel on the road. Therefore, road rescue and trailer service play an increasingly important role in life. The existing trailer has certain problems. The trailer chassis is too high, and it is very troublesome to load and unload the towed vehicle. When the towed vehicle loses power, only the crane can be used to lift the trailer, which wastes a lot of manpower and resources. Most trailers fix the towed vehicle through ropes and locks. This method has certain risks. When driving on rough roads, the towed vehicle may slide off the trailer, threatening the safety of pedestrians and vehicles. Therefore, a new trailer device is designed to load and unload the towed vehicle by controlling the lifting of the frame, and to firmly fix the towed vehicle by using the movable tray mechanism, thereby improving the safety and stability of the trailer and ensuring the completion of the trailer work. SUMMARY

[0003] Therefore, in order to solve the technical problem that the towed vehicle may slide off the trailer, threatening the safety of pedestrians and vehicles, the present application provides a liftable trailer device, which loads and unloads the towed vehicle by controlling the lifting of the frame, and firmly fixes the towed vehicle by using the movable tray mechanism, thereby improving the safety and stability of the trailer and ensuring the completion of the trailer work.

[0004] To solve the above technical problems, the present application provides the following technical solutions:

[0005] A liftable trailer device, comprising a frame, a jack, a trailer hook and a wheel provided on the frame;

[0006] The frame is provided with a lifting mechanism, a movable tray mechanism, an axle assembly and a hydraulic lifting mechanism;

[0007] The lifting mechanism comprises:

[0008] Lifting hooks are provided on both sides of the left and right ends of the frame for driving the frame to lift;

[0009] Lifting bases are provided on both sides of the left and right ends of the frame, and are provided with threaded holes for driving the frame to lift;

[0010] The movable tray mechanism is located between the adjacent lifting hooks and lifting bases;

[0011] The active tray mechanism comprises:

[0012] A tray cover plate is arranged on the upper part of the active tray mechanism and cooperates with the vehicle frame to form a groove;

[0013] A fixed shaft, a movable pin shaft, a sliding shaft, a spring locking block and a spring are sequentially arranged in the groove from left to right.

[0014] The fixed shaft is arranged horizontally on the left side of the groove in a concave shape, and the protruding part of the fixed shaft is provided with a hole matched with the movable pin shaft, the movable pin shafts are rotatably connected through a bearing piece, the movable pin shafts are rotatably connected with the sliding shaft through the bearing piece, one end of the sliding shaft is connected with the spring locking block, the other end of the spring locking block is connected with one end of the spring, and the other end of the spring is connected with the vehicle frame.

[0015] The tray cover plate is provided with a rope and a rope hook for fixing the wheels of the towed vehicle.

[0016] The axle assembly comprises a bracket base rotatably connected to the vehicle frame and a bracket connected with the wheels through an axle.

[0017] The bracket is connected with the bracket base.

[0018] The hydraulic lifting mechanism comprises a hydraulic support rod bracket rotatably connected to the vehicle frame, a hydraulic support rod arranged on the hydraulic support rod bracket, a rotating handle for driving the hydraulic support rod to extend or retract, a bolt hole opened in the vehicle frame, a bolt inserted into the bolt hole, and a screw rod screwed into the threaded hole in the lifting base and driving the vehicle frame to lift.

[0019] Preferably, the height of the lifting hook from the bottom of the vehicle frame is greater than the height when the jack is fully retracted.

[0020] Preferably, the cross section of the groove is in a stepped shape.

[0021] Preferably, the number of the lifting hook, the lifting base and the active tray mechanism is four.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] The lifting trailer device provided by the present application can firmly fix the towed vehicle by controlling the lifting of the vehicle frame, improving the safety and stability of the trailer, and ensuring the completion of the trailer work. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1a plan view of the above-described embodiment of the present application;

[0025] Figure 2 a front view of the above-described embodiment of the present application;

[0026] Figure 3 a rear view of the above-described embodiment of the present application; Figure 2 an A-A sectional view of the above-described embodiment of the present application;

[0027] Figure 4 a B partial enlarged view of the above-described embodiment of the present application; Figure 3

[0028] a C partial enlarged view of the above-described embodiment of the present application; Figure 5 Figure 1 a D partial enlarged view of the above-described embodiment of the present application;

[0029] Figure 6 a right view of the above-described embodiment of the present application after landing on the ground;

[0030] Figure 7 Figure 6 a plan view of the above-described embodiment of the present application after landing on the ground;

[0031] Figure 8 a plan view of the above-described embodiment of the present application after landing on the ground;

[0032] Figure 9 a plan view of the above-described embodiment of the present application after landing on the ground;

[0033] Figure 10 a plan view of the above-described embodiment of the present application after landing on the ground;

[0034] ​​Figure: 1, trailer hook, 2, frame, 3, bolt hole, 4, lifting hook one, 5, lifting hook two, 6, lifting hook three, 7, lifting hook four, 8, lifting base one, 9, lifting base two, 10, lifting base three, 11, lifting base four, 12, fixed shaft one, 13, movable pin shaft one, 14, movable pin shaft two, 15, movable pin shaft three, 16, movable pin shaft four, 17, sliding shaft one, 18, bearing piece one, 19, bearing piece two, 20, bearing piece three, 21, bearing piece four, 22, spring locking block one, 23, spring one, 24, spring locking block two, 25, spring two, 26, fixed shaft two, 27, movable pin shaft five, 28, movable pin shaft six, 29, movable pin shaft seven, 30, movable pin shaft eight, 31, sliding shaft two, 32, bearing piece five, 33, bearing piece six, 34, bearing piece seven, 35, bearing piece eight, 36, spring locking block three, 37, spring three, 38, spring locking block four, 39, spring four, 40, fixed shaft three, 41, movable pin shaft nine, 42, movable pin shaft ten, 43, movable pin shaft eleven, 44, movable pin shaft twelve, 45, sliding shaft three, 46, bearing piece nine, 47, bearing piece ten, 48, bearing piece eleven, 49, bearing piece twelve, 50, spring locking block five, 51, spring five, 52, spring locking block six, 53, spring six, 54, fixed shaft four, 55, movable pin shaft thirteen, 56, movable pin shaft fourteen, 57, movable pin shaft fifteen, 58, movable pin shaft sixteen, 59, sliding shaft four, 60, bearing piece thirteen, 61, bearing piece fourteen, 62, bearing piece fifteen, 63, bearing piece sixteen, 64, spring locking block seven, 65, spring seven, 66, spring locking block eight, 67, spring eight, 68, bracket one, 69, bracket two, 70, wheel one, 71, bracket base one, 72, bracket base two, 73, long bolt one, 74, long bolt two, 75, long bolt three, 76, long bolt four, 77, bracket three, 78, bracket four, 79, wheel two, 80, bracket base three, 81, bracket base four, 82, long bolt five, 83, long bolt six, 84, long bolt seven, 85, long bolt eight, 86, hydraulic support rod bracket, 87, bolt, 88, fastening bolt one, 89, fastening bolt two, 90, hydraulic support rod, 91, handle, 92, hinge five, 93, hinge one, 94, hinge two, 95, hinge three, 96, hinge four, 97, tray cover plate bolt, 98, tray cover plate, 99, rope hook, 100, rope, 101, axle one, 102, axle two, 103, screw rod. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] As shown in Figures 1-10 The present application provides a liftable trailer device, comprising a frame 2, a jack, a trailer hook 1 and a wheel provided on the frame 2;

[0039] The frame 2 is provided with a lifting mechanism, a movable tray mechanism, an axle assembly and a hydraulic lifting mechanism;

[0040] The lifting mechanism comprises:

[0041] A lifting hook is provided on both sides of the left and right ends of the frame 2, for driving the frame 2 to lift;

[0042] A lifting base is provided on both sides of the left and right ends of the frame 2, and a threaded hole is formed in each lifting base for driving the frame 2 to lift;

[0043] The movable tray mechanism is located between the adjacent lifting hooks and the lifting bases;

[0044] The movable tray mechanism comprises:

[0045] A tray cover plate 98 is arranged on the upper part of the movable tray mechanism and cooperates with the vehicle frame 2 to form a groove;

[0046] A fixed shaft, a movable pin shaft, a sliding shaft, a spring locking block and a spring are sequentially arranged in the groove from left to right.

[0047] The fixed shaft is arranged horizontally on the left side of the groove in a concave shape, and the protruding part of the fixed shaft is provided with a hole for cooperating with the movable pin shaft. The movable pin shafts are rotatably connected through a bearing piece, and the movable pin shafts are rotatably connected with the sliding shaft through the bearing piece. One end of the sliding shaft is connected with the spring locking block, and the other end of the spring locking block is connected with one end of the spring. The other end of the spring is connected with the vehicle frame 2.

[0048] The tray cover plate 98 is provided with a rope 100 and a rope hook 99 for fixing the wheels of the vehicle to be towed.

[0049] The axle assembly comprises a bracket base rotatably connected to the vehicle frame 2 and a bracket connected with the wheels through an axle.

[0050] The bracket is connected with the bracket base.

[0051] The hydraulic lifting mechanism comprises a hydraulic support rod bracket rotatably connected to the vehicle frame, a hydraulic support rod 90 arranged on the hydraulic support rod bracket 86, a rotating handle 91 for driving the hydraulic support rod 90 to extend or retract, a bolt hole 3 opened on the vehicle frame, a bolt 87 inserted into the bolt hole 3, and a screw rod 103 screwed into the threaded hole of the lifting base and driving the vehicle frame 2 to lift.

[0052] In the present application, the height of the lifting hook from the bottom of the vehicle frame is greater than the height when the jack is fully retracted.

[0053] In the present application, the cross section of the groove is in a stepped shape.

[0054] In the present application, the number of lifting hooks, lifting bases and movable tray mechanisms is four.

[0055] The above-mentioned liftable trailer device provided by the present application preferably has the following structure:

[0056] A liftable trailer device, comprising a trailer hook 1, a vehicle frame 2, a lifting mechanism, a hydraulic support mechanism, an axle assembly, wheels, a movable tray mechanism;

[0057] The lifting mechanism comprises a lifting hook one 4, a lifting hook two 5, a lifting hook three 6, a lifting hook four 7, a lifting base one 8, a lifting base two 9, a lifting base three 10 and a lifting base four 11.

[0058] Wherein, the axle assembly includes hinge one 93, hinge two 94, hinge three 95, hinge four 96, bracket base one 71, bracket base two 72, bracket base three 80, bracket base four 81, long bolt one 73, long bolt two 74, long bolt three 75, long bolt four 76, long bolt five 82, long bolt six 83, long bolt seven 84, long bolt eight 85, bracket one 68, bracket two 69, bracket three 77, bracket four 78, axle one 101, axle two 102;

[0059] Wherein, the wheel includes wheel one 70, wheel two 79;

[0060] Wherein, the movable tray mechanism includes fixed shaft one 12, movable pin shaft one 13, movable pin shaft two 14, movable pin shaft three 15, movable pin shaft four 16, sliding shaft one 17, bearing piece one 18, bearing piece two 19, bearing piece three 20, bearing piece four 21, spring locking block one 22, spring locking block two 24, spring one 23, spring two 25, fixed shaft two 26, movable pin shaft five 27, movable pin shaft six 28, movable pin shaft seven 29, movable pin shaft eight 30, sliding shaft two 31, bearing piece five 32, bearing piece six 33, bearing piece seven 34, bearing piece eight 35, spring locking block three 36, spring locking block four 38, spring three 37, spring four 39, fixed shaft three 40, movable pin shaft nine 41, movable pin shaft ten 42, movable pin shaft eleven 43, movable pin shaft twelve 44, sliding shaft three 45, bearing piece nine 46, bearing piece ten 47, bearing piece eleven 48, bearing piece twelve 49, spring locking block five 50, spring locking block six 52, spring five 51, spring six 53, fixed shaft four 54, movable pin shaft thirteen 55, movable pin shaft fourteen 56, sliding shaft fifteen 57, movable pin shaft sixteen 58, sliding shaft four 59, bearing piece thirteen 60, bearing piece fourteen 61, bearing piece fifteen 62, bearing piece sixteen 63, spring locking block seven 64, spring locking block eight 66, spring seven 65, spring eight 67, tray cover plate 98, tray cover plate bolt 97, rope hook 99, rope 100;

[0061] Wherein, the hydraulic support mechanism includes hinge five 92, hydraulic support rod bracket 86, bolt 87, fastening bolt one 88, fastening bolt two 89, hydraulic support rod 90, handle 91, bolt hole 3, screw rod 103;

[0062] The specific structure is as follows:

[0063] The frame 2 is connected with the trailer hook 1, and the frame 2 is welded with the lifting hook one 4, the lifting hook two 5, the lifting hook three 6, the lifting hook four 7, the lifting base one 8, the lifting base two 9, the lifting base three 10, the lifting base four 11, the hinge one 93, the hinge two 94, the hinge three 95, the hinge four 96 and the hinge five 92 as a whole, and the frame 2 is fixedly connected with the spring one 23, the spring two 25, the spring three 37, the spring four 39, the spring five 51, the spring six 53, the spring seven 65 and the spring eight 67;

[0064] The frame 2, the fixed shaft, the tray cover plate 98 are provided with bolt holes, the frame 2, the fixed shaft, the tray cover plate 98 are fixed by the tray cover plate bolt 97, the tray cover plate 98 is placed in the upper portion of the position of the movable tray mechanism, and is cooperated with the frame 2 to form the groove, the fixed shaft, the sliding shaft and the rest movable pin shaft are horizontally arranged in the groove of the frame 2, the fixed shaft one 12, the fixed shaft two 26, the fixed shaft three 40, the fixed shaft four 54 are in the shape of concave, the protruding part is provided with the hole matched with the movable pin shaft, the bearing piece one 18, the bearing piece three 20, the bearing piece five 32, the bearing piece seven 34, the bearing piece nine 46, the bearing piece eleven 48, the bearing piece thirteen 60, the bearing piece fifteen 62 are in the shape of cross, the hole matched with the movable pin shaft is arranged on the both sides of the middle part, the bearing piece two 19, the bearing piece four 21, the bearing piece six 33, the bearing piece eight 35, the bearing piece ten 47, the bearing piece twelve 49, the bearing piece fourteen 61, the bearing piece sixteen 63 are in the shape of H, the hole matched with each movable pin shaft is arranged on the both sides of the head section and the tail end, the fixed shaft one 12 is connected with the movable pin shaft one 13, the movable pin shaft one 13 is connected with the bearing piece one 18, the bearing piece one 18 is connected with the movable pin shaft two 14, the movable pin shaft two 14 is connected with the bearing piece two 19, the bearing piece two 19 is connected with the movable pin shaft three 15, the movable pin shaft three 15 is connected with the bearing piece three 20, the bearing piece three 20 is connected with the movable pin shaft four 16, the movable pin shaft four 16 is connected with the bearing piece four 21, the bearing piece four 21 is connected with the sliding shaft one 17, the sliding shaft one 17 is connected with the spring lock block one 22, the spring lock block two 24, the spring lock block one 22, the spring lock block two 24 are respectively connected with the spring one 23, the spring two 25, the fixed shaft two 26 is connected with the movable pin shaft five 27, the movable pin shaft five 27 is connected with the bearing piece five 32, the bearing piece five 32 is connected with the movable pin shaft six 28, the movable pin shaft six 28 is connected with the bearing piece six 33, the bearing piece six 33 is connected with the movable pin shaft seven 29, the movable pin shaft seven 29 is connected with the bearing piece seven 34, the bearing piece seven 34 is connected with the movable pin shaft eight 30, the movable pin shaft eight 30 is connected with the bearing piece eight 35, the bearing piece eight 35 is connected with the sliding shaft two 31, the sliding shaft two 31 is connected with the spring lock block three 36, the spring lock block four 38, the spring lock block three 36, the spring lock block four 38 are respectively connected with the spring three 37, the spring four 39, the fixed shaft three 40 is connected with the movable pin shaft nine 41, the movable pin shaft nine 41 is connected with the bearing piece nine 46, the bearing piece nine 46 is connected with the movable pin shaft ten 42, the movable pin shaft ten 42 is connected with the bearing piece ten 47, the bearing piece ten 47 is connected with the movable pin shaft eleven 43, the movable pin shaft eleven 43 is connected with the bearing piece eleven 48, the bearing piece eleven 48 is connected with the movable pin shaft twelve 44, the movable pin shaft twelve 44 is connected with the bearing piece twelve 49, the bearing piece twelve 49 is connected with the sliding shaft three 45, the sliding shaft three 45 is connected with the spring lock block five 50, the spring lock block six 52, the spring lock block five 50, the spring lock block six 52 are respectively connected with the spring five 51, the spring six 53, the fixed shaft four 54 is connected with the movable pin shaft thirteen 55, the movable pin shaft thirteen 55 is connected with the bearing piece thirteen 60,The load bearing piece thirteen 60 is connected with the movable pin shaft fourteen 56, the movable pin shaft fourteen 56 is connected with the load bearing piece fourteen 61, the load bearing piece fourteen 61 is connected with the movable pin shaft fifteen 57, the movable pin shaft fifteen 57 is connected with the load bearing piece fifteen 62, the load bearing piece fifteen 62 is connected with the movable pin shaft sixteen 58, the movable pin shaft sixteen 58 is connected with the load bearing piece sixteen 63, the load bearing piece sixteen 63 is connected with the sliding shaft four 59, the sliding shaft four 59 is connected with the spring locking block seven 64 and the spring locking block eight 66, the spring locking block seven 64 and the spring locking block eight 66 are respectively connected with the spring seven 65 and the spring eight 67, one end of the spring is fixedly connected with the vehicle frame 2, the other end is connected with the spring locking block, the spring locking block and the spring are arranged in the recess of the vehicle frame 2, the spring locking block and the sliding shaft move along the recess, when the movable tray mechanism is under the wheel load, the sliding shaft one 17, the sliding shaft two 31, the sliding shaft three 45 and the sliding shaft four 59 drive the spring one 23, the spring two 25, the spring three 37, the spring four 39, the spring five 51, the spring six 53, the spring seven 65 and the spring eight 67 to move in the recess, and then drive the movable pin shaft three 15, the movable pin shaft four 16, the movable pin shaft seven 29, the movable pin shaft eight 30, the movable pin shaft eleven 43, the movable pin shaft twelve 44, the movable pin shaft fifteen 57 and the movable pin shaft sixteen 58 to move to one side of the fixed shaft one 12, the fixed shaft two 26, the fixed shaft three 40 and the fixed shaft four 54 respectively, the length of the movable pin shaft three 15, the movable pin shaft seven 29, the movable pin shaft eleven 43, the movable pin shaft fifteen 57 and the load bearing piece is less than the length of the fixed shaft, the sliding shaft and the rest of the movable pin shaft, the movable pin shaft three 15, the movable pin shaft seven 29, the movable pin shaft eleven 43 and the movable pin shaft fifteen 57 do not move horizontally in the recess, the motion track is arc-shaped, the load bearing piece two 19 and the load bearing piece three 20 rotate around the movable pin shaft two 14, the movable pin shaft three 15 and the movable pin shaft four 16, the load bearing piece six 33 and the load bearing piece seven 34 rotate around the movable pin shaft six 28, the movable pin shaft seven 29 and the movable pin shaft eight 30, the load bearing piece ten 47 and the load bearing piece eleven 48 rotate around the movable pin shaft ten 42, the movable pin shaft eleven 43 and the movable pin shaft twelve 44, the load bearing piece fourteen 61 and the load bearing piece fifteen 62 rotate around the movable pin shaft fourteen 56, the movable pin shaft fifteen 57 and the movable pin shaft sixteen 58, the rotation makes the movable tray mechanism deform to be V-shaped, when the movable tray mechanism is unloaded, the load bearing piece, the sliding shaft and the movable pin shaft return to the original position under the action of the spring,

[0065] The rope 100 is fixed with the rope hook 99 of the towing vehicle, the hydraulic support rod 90 is fixed on the hydraulic support rod support 86, the hydraulic support rod support 86 is fixedly connected with the hinge five 92 through the fastening bolt one 88 and the fastening bolt two 89, the support one 68 and the support two 69 are connected with the wheel one 70 through the axle one 101, the support base one 71 and the support base two 72 are integrally welded with the support one 68 and the support two 69, the support base one 71 and the support base two 72 are locked on the frame 2 through the long bolt one 73, the long bolt two 74, the long bolt three 75 and the long bolt four 76 on the other side of the hinge one 93 and the hinge two 94, the support three 77 and the support four 78 are connected with the wheel two 79 through the axle two 102, the support base three 80 and the support base four 81 are integrally welded with the support three 77 and the support four 78, the support base three 80 and the support base four 81 are locked on the frame 2 through the long bolt five 82, the long bolt six 83, the long bolt seven 84 and the long bolt eight 85 on the other side of the hinge three 95 and the hinge four 96, the lifting hook one 4 and the lifting hook three 6 are welded on both sides of the front end of the frame 2, the lifting hook two 5 and the lifting hook four 7 are welded on both sides of the tail end of the frame 2, the distance between the lifting hook one 4, the lifting hook two 5, the lifting hook three 6 and the lifting hook four 7 and the bottom of the frame 2 is greater than the height when the jack is fully retracted, the lifting base one 8 and the lifting base three 10 are welded on both sides of the front end of the frame 2, the lifting base two 9 and the lifting base four 11 are welded on both sides of the tail end of the frame 2, and the areas where the lifting base one 8, the lifting base two 9, the lifting base three 10 and the lifting base four 11 are welded with the frame 2 are provided with threaded holes;

[0066] The lifting trailer device provided by the application has the following three lifting modes:

[0067] When the trailer is used, three lifting modes can be used, the first mode is that four jacks are used to press against the lifting hook one 4, the lifting hook two 5, the lifting hook three 6 and the lifting hook four 7 respectively, and the up-down movement of the frame 2 is controlled by controlling the lifting of the jacks, the second mode is that four screws 103 are screwed into the lifting base one 8, the lifting base two 9, the lifting base three 10 and the lifting base four 11 respectively, and the up-down movement of the frame 2 is controlled by rotating the screws 103, and the third mode is that the jacks and the screws 103 are used in combination, and when the trailer is lifted, multiple people can operate the jacks and the screws 103 simultaneously, or one person can operate each jack and screw 103 in turn from front to back and left to right, and the second mode and the third mode are alternative modes of the first mode;

[0068] The length of the screw rod 103 is greater than the height of the frame 2 from the ground, the screw rod 103 adopts a quadrangular structure, the widths of the bearing pieces two 19, the bearing piece three 20, the bearing piece six 33, the bearing piece seven 34, the bearing piece ten 47, the bearing piece eleven 48, the bearing piece fourteen 61 and the bearing piece fifteen 62 are greater than the widths of the remaining bearing pieces, the frame 2 is hollowed out in the shape of two cuboids at the movable tray structure, the length and the height of the lower cuboid are greater than those of the upper cuboid, the cross section is in a stepped shape, the frame 2 is provided with cuboid-shaped grooves on the left and right sides of the lower hollowed-out area, the support base is welded with the hinge contact surface in an integrated manner, after the long bolts are removed, the axle assembly can rotate around the hinge.

[0069] After the jack abuts against the lifting hook, the handle 91 is rotated to make the hydraulic support rod 90 retract, the fastening bolt one 88 and the fastening bolt two 89 are removed, the hydraulic support rod 90 is rotated around the hinge five 92, the bolt 87 is inserted into the bolt hole 3, the hydraulic support rod 90 is fixed, the trailer is lifted, the long bolt one 73, the long bolt two 74, the long bolt three 75, the long bolt four 76, the long bolt five 82, the long bolt six 83, the long bolt seven 84 and the long bolt eight 85 are removed, the support one 68, the support two 69 and the wheel one 70 as well as the support three 77, the support four 78 and the wheel two 79 are rotated around the hinge one 93, the hinge two 94, the hinge three 95 and the hinge four 96 to the two sides of the frame 2, the jack gradually falls, the frame 2 falls to the ground, the towed vehicle is pushed onto the frame 2, the jack is gradually lifted, after the frame 2 is lifted, the bearing pieces support the wheels, the sliding shaft pulls the spring to move along the groove under the pressure of the weight of the towed vehicle, meanwhile, the bearing pieces rotate with the movable pin shaft, the movable tray mechanism is deformed into a V shape, the wheels are clamped by the movable pin shaft, the rope 100 is passed through the rope hook 99 to bind the wheels, the support one 68, the support two 69 and the wheel one 70 as well as the support three 77, the support four 78 and the wheel two 79 are restored to the original positions, the support base is fixed with the frame 2 through the long bolt one 73, the long bolt two 74, the long bolt three 75, the long bolt four 76, the long bolt five 82, the long bolt six 83, the long bolt seven 84 and the long bolt eight 85, the trailer hook 1 is connected with the towing vehicle, the jack falls, the wheels contact the ground, the jack is retracted, the work of the towed vehicle on the vehicle is completed, the work of the towed vehicle off the vehicle is opposite to the work of the towed vehicle on the vehicle.

[0070] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme of the present application and the improved concept thereof within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A liftable trailer device, characterized in that, Includes a frame, jacks, a tow hook mounted on the frame, and wheels; The vehicle frame is equipped with a lifting mechanism, a movable pallet mechanism, an axle assembly, and a hydraulic lifting mechanism. The lifting mechanism includes: Lifting hooks are located on both sides of the left and right ends of the vehicle frame and are used to drive the vehicle frame to lift. The lifting base is located on both sides of the left and right ends of the vehicle frame, and each side has threaded holes for driving the vehicle frame to lift. The movable pallet mechanism is located between the adjacent lifting hook and the lifting base; The movable pallet mechanism includes: The pallet cover is located on the upper part of the movable pallet mechanism and cooperates with the frame to form a groove; The groove contains, from left to right, a fixed shaft, a movable pin, a sliding shaft, a spring locking block, and a spring. The fixed shaft is U-shaped and horizontally positioned on the left side of the groove. The protruding part of the fixed shaft has a hole for engaging with the movable pin. The movable pins are rotatably connected to each other through a load-bearing plate. The movable pin is rotatably connected to the sliding shaft through the load-bearing plate. The sliding shaft is connected to one end of the spring locking block. The other end of the spring locking block is connected to one end of the spring. The other end of the spring is connected to the vehicle frame. The pallet cover is provided with ropes and rope hooks for securing the wheels of the vehicle being towed. The axle assembly includes a bracket base rotatably connected to the frame and a bracket connected to the wheel via an axle; The bracket is connected to the bracket base; The hydraulic lifting mechanism includes a hydraulic support rod bracket rotatably connected to the vehicle frame, a hydraulic support rod disposed on the hydraulic support rod bracket, a rotating handle for driving the extension and retraction of the hydraulic support rod, a pin hole opened on the vehicle frame, a pin for inserting into the pin hole, and a screw for screwing into the threaded hole on the lifting base and driving the vehicle frame to lift and lower.

2. The liftable trailer device according to claim 1, characterized in that, The height of the lifting hook from the bottom of the frame is greater than the height of the jack when it is fully retracted.

3. The liftable trailer device according to claim 1, characterized in that, The groove has a stepped cross-section.

4. A liftable trailer device according to any one of claims 1-3, characterized in that, The number of the lifting hook, the lifting base, and the movable pallet mechanism are all four.

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