Detachable self-lifting gooseneck device and using method thereof

Abstract

The invention discloses a detachable self-lifting gooseneck device, and relates to the technical field of semi-trailer cargo transport vehicles. The vehicle comprises a tractor, a gooseneck assembly, a connecting frame assembly and a platform assembly, a gooseneck saddle is arranged in the middle of the tractor; a supporting seat is arranged at the right end of the tractor; a traction pin is arranged at the bottom of the left end of the gooseneck assembly, a gooseneck supporting hydraulic oil cylinder is vertically and downwards arranged in the middle of the gooseneck assembly, and a gooseneck lifting hydraulic oil cylinder is transversely and rightwards arranged in the middle of the gooseneck assembly. A gooseneck lifting hydraulic oil cylinder is connected with the right end of the top of the connecting frame assembly. The lower portion of the right end of the gooseneck assembly is hinged to the left end of the bottom of the connecting frame assembly through a connecting spindle. The middle of the left end of the platform assembly is clamped with the connecting spindle. According to the invention, the disassembly and assembly convenience is realized, the stress strength and the transportation reliability are ensured, the gravity, the impact force of acceleration, deceleration and disassembly and the secondary torsion caused by severe road conditions can be comprehensively borne, and the stress structure is safe and reliable. The invention further relates to a using method of the detachable self-lifting gooseneck device.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-trailer cargo transport vehicles, and more particularly to a detachable self-lifting gooseneck device. The present invention also relates to a method for using the detachable self-lifting gooseneck device. Background Art

[0002] In traditional gooseneck semi-trailers, the gooseneck and the cargo platform are welded together to form an inseparable whole. This non-detachable welded structure has the advantages of simple and reliable structure, but it also makes the trailer inevitably produce impact when coupled with the tractor; the support device at the gooseneck must be lowered when uncoupling, which is time-consuming and labor-intensive; loading and unloading can only be done from the rear end of the axle, resulting in a single and inflexible loading and unloading method; when empty trailers are parked densely, they cannot be stacked to utilize the space in the height direction, and occupy a large area; this vehicle structure has multiple shortcomings, which ultimately leads to a direct or indirect increase in the operating costs of the transportation company.

[0003] The problems from market feedback will naturally urge our cargo transport equipment design and manufacturing companies to seek innovation and change; the design goal is to solve a series of problems caused by the fixed gooseneck of this type of trailer while retaining the technical advantages of the existing fixed gooseneck trailer, so as to further enhance the product function and usage prospects.

[0004] Therefore, it is necessary to develop and design a detachable self-lifting gooseneck device and its use method that retains the advantages of the gooseneck semi-trailer while designing the gooseneck into a special structure that is detachable, liftable, simple and reliable, so as to facilitate the whole vehicle to achieve multiple advantages such as impact-free coupling, support-free uncoupling, front and rear double loading and unloading, and empty body stacking. Summary of the Invention

[0005] The first object of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a detachable self-lifting gooseneck device.

[0006] A second object of the present invention is to provide a method for using the detachable self-lifting gooseneck device.

[0007] In order to achieve the above-mentioned first object, the technical solution of the present invention is: a detachable self-lifting gooseneck device, characterized by comprising a tractor, a gooseneck assembly, a connecting frame assembly, and a cargo platform assembly;

[0008] A gooseneck saddle is provided in the middle of the tractor, and a support seat is provided at the right end of the tractor;

[0009] A traction pin is provided at the bottom of the left end of the gooseneck assembly, a gooseneck support hydraulic cylinder is provided vertically downward in the middle, and a gooseneck lifting hydraulic cylinder is provided horizontally to the right in the middle of the gooseneck assembly; the traction pin matches the gooseneck saddle, and the gooseneck support hydraulic cylinder matches the support seat; the gooseneck lifting hydraulic cylinder is connected to the right end of the top of the connecting frame assembly, and the lower right end of the gooseneck assembly is hinged to the left end of the bottom of the connecting frame assembly through a connecting main shaft;

[0010] A locking oil cylinder is vertically arranged downward in the connecting frame assembly;

[0011] The middle part of the left end of the cargo platform assembly is clamped with the connecting main shaft through the traction head assembly; the top of the traction head assembly is provided with a locking groove that matches the end of the locking cylinder piston rod.

[0012] In the above technical solution, small springboards are hinged on both sides of the left end of the cargo platform assembly.

[0013] In the above technical solution, the two traction head assemblies are spaced apart in the middle of the left end of the cargo platform assembly, and the connection point between the left end of the traction head assembly and the connecting main shaft is a tiger's mouth-shaped clamping hole.

[0014] In the above technical solution, the two gooseneck supporting hydraulic cylinders are spaced apart and arranged in the middle of the gooseneck assembly.

[0015] In the above technical solution, the gooseneck supporting hydraulic cylinder, the gooseneck lifting hydraulic cylinder, and the locking cylinder are all connected to the operating handle.

[0016] In the above technical solution, a cylinder seat is horizontally arranged in the middle of the gooseneck assembly, and a hinge support is arranged at the bottom of the right end; a cylinder ear plate is arranged at the top right end of the connecting frame assembly, and a shaft sleeve is arranged at the bottom left end;

[0017] The left end of the gooseneck lifting hydraulic cylinder is connected to the cylinder seat through a pin shaft, and the right end is connected to the cylinder ear plate;

[0018] The connecting main shaft passes through the hinge support and the shaft sleeve.

[0019] In the above technical solution, a connecting seat is provided at the bottom right side of the connecting frame assembly, and the connecting seat is detachably connected to the traction head assembly via a locking bolt.

[0020] In order to achieve the above second purpose, the technical solution of the present invention is: a method for using a detachable self-lifting gooseneck device, characterized in that it includes a disassembly method and an assembly method;

[0021] The disassembly method includes the following steps:

[0022] Step 1, uninstall:

[0023] When the vehicle is parked, the towing pin is connected to the gooseneck saddle; by operating the operating handle of the gooseneck lifting hydraulic cylinder, the gooseneck lifting hydraulic cylinder is shortened and the relative angle between the gooseneck assembly and the cargo platform assembly is deflected, causing the left end of the cargo platform assembly to drop to contact the ground, and the support point is transferred from the gooseneck saddle to the contact point between the cargo platform assembly and the ground, so that the gooseneck assembly is in a non-stressed unloading state;

[0024] Step 2, Unlock:

[0025] By operating the operating handle of the locking cylinder, the locking cylinder is retracted and unlocked, and the locking bolt of the connecting seat is loosened, so that the entire gooseneck assembly and the connecting frame assembly are in a completely unlocked state relative to the cargo platform assembly;

[0026] Step 3, detach:

[0027] By operating the operating handle of the gooseneck supporting hydraulic cylinder, the gooseneck assembly and the connecting frame assembly are linked as a whole component and descend in an arc swing trajectory; when the connecting spindle is disengaged from the tiger's mouth-shaped clamping hole in the traction head assembly, the tractor is moved to separate the gooseneck assembly and the connecting frame assembly from the cargo platform assembly, thus realizing the disassembly and separation of the gooseneck;

[0028] The assembly method includes the following steps:

[0029] Step 1, connect:

[0030] The traction pin is connected to the gooseneck saddle, and the tractor, gooseneck assembly and connecting frame assembly are close to the cargo platform assembly parked on the ground; by operating the operating handle of the gooseneck supporting hydraulic oil cylinder, the gooseneck assembly and the connecting frame assembly are linked as a whole component and descend in an arc-shaped swing trajectory until the connecting spindle is lower than the tiger's mouth-shaped clamping hole, and the tractor is slightly moved until the connecting spindle contacts the tiger's mouth-shaped clamping hole; then the operating handle of the gooseneck supporting hydraulic oil cylinder is continued to be operated to make the connecting spindle slowly swing upward in an arc-shaped swing trajectory until it contacts the tiger's mouth-shaped clamping hole and is locked in the arc; at this time, the gooseneck assembly and the connecting frame assembly are connected to the cargo platform assembly;

[0031] Step 2, Locking:

[0032] Insert the locking bolt through the connecting hole of the traction head assembly and the connecting seat and tighten it until the two fit tightly together; then operate the operating handle of the locking cylinder to extend the locking cylinder, and the locking ball head at the end of the locking cylinder piston rod fits tightly into the locking groove of the traction head assembly, completing the locking action of the locking cylinder;

[0033] Step 3, lifting:

[0034] Operate the operating handle of the gooseneck lifting hydraulic cylinder to extend the gooseneck lifting hydraulic cylinder. At the same time, the front end of the cargo platform assembly is driven to rise to the same level as the cargo platform surface through the relative rotation between the gooseneck assembly and the connecting frame assembly. This completes the assembly operation of the entire gooseneck.

[0035] In the above technical solution, after step 3 of the disassembly method, the small springboard at the ground point of the cargo platform assembly parked on the ground is lowered, and the rear wheel group of the next cargo platform assembly is reversed to the right end of the previous cargo platform assembly through the small springboard, so that multiple cargo platform assemblies can be parked in a stacked manner.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] 1) The integrally detachable gooseneck assembly of the present invention is connected by a special-shaped card hole connecting the main shaft and the traction head assembly, which not only realizes the convenience of disassembly and assembly but also ensures the stress strength and transportation reliability: it can comprehensively withstand gravity, the impact force of acceleration and deceleration and disassembly and assembly, and the secondary torque caused by poor road conditions, and the stress-bearing structure is safe and reliable.

[0038] 2) In the present invention, regardless of whether the vehicle is heavily loaded or unloaded, the transmission path of the traction force and the total mass supporting force is: gooseneck assembly → gooseneck lifting hydraulic cylinder → connecting main shaft → connecting frame assembly → traction head assembly → cargo platform assembly. The components involved in this transmission path are all rigid components; the locking cylinder and locking bolts involved in the disassembly and assembly process are only positioning components, the purpose of which is to make the corresponding components in close contact to maintain the correct position relationship and do not participate in the transmission of force. Therefore, the overall force state of the present invention is statically determinate and reliable.

[0039] 3) The gooseneck lifting hydraulic cylinder of the present invention is located at the top of the gooseneck assembly, which can provide a sufficiently long effective rotation force arm, thereby improving efficiency and reliability and reducing costs.

[0040] 4) The gooseneck assembly and the connecting frame assembly of the present invention are connected by a gooseneck lifting hydraulic cylinder to achieve relative rotation around the axis of the connecting main shaft; since the connecting frame assembly and the cargo platform assembly are integrally connected by the traction head assembly, the connecting main shaft, the locking cylinder, and the locking bolts, they form an integral component that cannot be relatively displaced, and thus relative rotation between the gooseneck assembly and the cargo platform assembly is also formed; therefore, when the traction pin of the gooseneck assembly is fixed in the gooseneck saddle, the extension of the gooseneck lifting hydraulic cylinder realizes the free lifting and lowering of the entire vehicle cargo platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the present invention.

[0042] Figure 2 A top view of the gooseneck assembly.

[0043] Figure 3This is a schematic diagram of the structure of the gooseneck assembly, connecting frame assembly and cargo platform assembly when the left end of the cargo platform assembly is in contact with the ground.

[0044] Figure 4 Schematic diagram of the structure for connecting the main shaft.

[0045] Figure 5 It is a structural diagram of the locking cylinder.

[0046] Figure 6 This is the front view of the gooseneck assembly.

[0047] Figure 7 A top view of the gooseneck assembly.

[0048] Figure 8 This is a side view of the gooseneck assembly.

[0049] Figure 9 It is the front view of the connecting frame assembly.

[0050] Figure 10 A top view of the connecting frame assembly.

[0051] Figure 11 It is a side view of the connecting frame assembly.

[0052] Figure 12 for Figure 9 Cross-sectional view at AA in the middle.

[0053] Figure 13 It is a front view of the traction head assembly.

[0054] Figure 14 A top view of the traction head assembly.

[0055] Figure 15 This is a structural diagram of the small springboard.

[0056] Figure 16 It is the hydraulic principle diagram of the present invention.

[0057] Among them, 100-tractor, 110-gooseneck saddle, 120-support seat, 200-gooseneck assembly, 210-traction pin, 220-gooseneck support hydraulic cylinder, 230-gooseneck lifting hydraulic cylinder, 231-pin shaft, 240-connecting main shaft, 250-cylinder seat, 260-hinge support, 300-connecting frame assembly, 310-locking cylinder, 311-locking cylinder seat, 320-shaft sleeve, 330-connecting seat, 331-locking bolt, 340-cylinder ear plate, 400-cargo platform assembly, 500-traction head assembly, 510-locking groove, 520-card hole, 600-small springboard, 610-handle. DETAILED DESCRIPTION

[0058] The following detailed description of the embodiments of the present invention is given in conjunction with the accompanying drawings, which do not limit the present invention but are merely examples. The advantages of the present invention will become clearer and easier to understand through the description.

[0059] Referring to the accompanying drawings, it can be seen that: a detachable self-lifting gooseneck device is characterized by comprising a tractor 100, a gooseneck assembly 200, a connecting frame assembly 300, and a cargo platform assembly 400;

[0060] A gooseneck saddle 110 is provided in the middle of the tractor 100, and a support base 120 is provided at the right end of the tractor 100;

[0061] A traction pin 210 is provided at the bottom of the left end of the gooseneck assembly 200, a gooseneck support hydraulic cylinder 220 is provided vertically downward in the middle, and a gooseneck lifting hydraulic cylinder 230 is provided horizontally to the right in the middle of the gooseneck assembly 200; the traction pin 210 matches the gooseneck saddle 110, and the gooseneck support hydraulic cylinder 220 matches the support base 120; the gooseneck lifting hydraulic cylinder 230 is connected to the top right end of the connecting frame assembly 300, and the lower right end of the gooseneck assembly 200 is hinged to the bottom left end of the connecting frame assembly 300 through the connecting main shaft 240;

[0062] A locking oil cylinder 310 is vertically downwardly provided in the connecting frame assembly 300 ; a locking oil cylinder seat 311 is provided in the connecting frame assembly 300 , and the locking oil cylinder 310 is installed in the locking oil cylinder seat 311 .

[0063] The middle part of the left end of the cargo platform assembly 400 is clamped with the connecting main shaft 240 through the traction head assembly 500; the top of the traction head assembly 500 is provided with a locking groove 510 that matches the end of the piston rod of the locking cylinder 310.

[0064] Small springboards 600 are hinged on both sides of the left end of the cargo platform assembly 300. A handle 610 is provided on the side of the left end of the small springboard 600 to facilitate the opening and closing of the small springboard 600.

[0065] The two traction head assemblies 500 are spaced apart and arranged in the middle of the left end of the cargo platform assembly 400. The connection point between the left end of the traction head assembly 500 and the connecting main shaft 240 is a tiger's mouth-shaped clamping hole 520.

[0066] The two gooseneck supporting hydraulic cylinders 220 are spaced apart and arranged in the middle of the gooseneck assembly 200 .

[0067] The gooseneck supporting hydraulic cylinder 220 , the gooseneck lifting hydraulic cylinder 230 , and the locking cylinder 310 are all connected to the operating handle.

[0068] A cylinder seat 250 is horizontally arranged in the middle of the gooseneck assembly 200, and a hinge support 260 is arranged at the bottom of the right end; a cylinder ear plate 340 is arranged at the top right end of the connecting frame assembly 300, and a shaft sleeve 320 is arranged at the bottom left end;

[0069] The left end of the gooseneck lifting hydraulic cylinder 230 is connected to the cylinder seat 250 through the pin 231, and the right end is connected to the cylinder ear plate 340;

[0070] The connecting main shaft 240 passes through the hinge support 260 and the shaft sleeve 320 .

[0071] A connecting seat 330 is provided at the bottom right side of the connecting frame assembly 300 , and the connecting seat 330 is detachably connected to the traction head assembly 500 via a locking bolt 331 .

[0072] A method for using a detachable self-lifting gooseneck device, characterized by comprising a disassembly method and an assembly method;

[0073] The disassembly method includes the following steps:

[0074] Step 1, uninstall:

[0075] like Figure 3 As shown, when the vehicle is parked, the towing pin 210 is connected to the gooseneck saddle 110; by operating the operating handle of the gooseneck lifting hydraulic cylinder 230, the gooseneck lifting hydraulic cylinder 230 is shortened and the relative angle between the gooseneck assembly 200 and the cargo platform assembly 400 is deflected, causing the left end of the cargo platform assembly 400 to drop to contact the ground, and the support point is transferred from the gooseneck saddle 110 to the point where the cargo platform assembly 400 contacts the ground, so that the gooseneck assembly 300 is in a non-stressed unloading state;

[0076] Step 2, Unlock:

[0077] By operating the operating handle of the locking cylinder 310, the locking cylinder 310 is retracted and unlocked, and the locking bolt 331 of the connecting seat 330 is loosened, so that the entire gooseneck assembly 200 and the connecting frame assembly 300 are in a completely unlocked state relative to the cargo platform assembly 400;

[0078] Step 3, Disengagement:

[0079] By operating the operating handle of the gooseneck supporting hydraulic cylinder 220, the gooseneck assembly 200 and the connecting frame assembly 300 are linked as an integral component and descend in an arc swing trajectory; when the connecting spindle 240 is disengaged from the tiger's mouth-shaped clamping hole 520 in the traction head assembly 500, the tractor 100 is moved to separate the gooseneck assembly 200 and the connecting frame assembly 300 from the cargo platform assembly 400, thereby realizing the disassembly and separation of the gooseneck;

[0080] The assembly method includes the following steps:

[0081] Step 1, connect:

[0082] The traction pin 210 is connected to the gooseneck saddle 110, and the tractor 100, the gooseneck assembly 200 and the connecting frame assembly 300 are close to the cargo platform assembly 400 parked on the ground; by operating the operating handle of the gooseneck supporting hydraulic oil cylinder 220, the gooseneck assembly 200 and the connecting frame assembly 300 are linked as a whole component to swing down in an arc trajectory until the connecting main shaft 240 is lower than the tiger's mouth-shaped clamping hole 520, and the tractor 100 is slightly moved until the connecting main shaft 240 contacts the tiger's mouth-shaped clamping hole 520; then continue to operate the operating handle of the gooseneck supporting hydraulic oil cylinder 220, so that the connecting main shaft 240 slowly swings upward in an arc-shaped swinging trajectory until it contacts the tiger's mouth-shaped clamping hole 520 and is locked in the arc; at this time, the gooseneck assembly 200 and the connecting frame assembly 300 are connected to the cargo platform assembly 400;

[0083] Step 2, Locking:

[0084] Insert the locking bolt 331 through the connecting hole of the traction head assembly 500 and the connecting seat 330 and tighten them so that the two fit tightly together; then operate the operating handle of the locking cylinder 310 to extend the locking cylinder 310, and the locking ball head at the end of the piston rod of the locking cylinder 310 fits tightly into the locking groove 510 of the traction head assembly 500, completing the locking action of the locking cylinder 310;

[0085] Step 3, lifting:

[0086] Operate the operating handle of the gooseneck lifting hydraulic cylinder 230 to extend the gooseneck lifting hydraulic cylinder 230, and at the same time drive the front end of the cargo platform assembly 400 to rise to the same level as the cargo platform surface of the cargo platform assembly 400 through the relative rotation movement between the gooseneck assembly 200 and the connecting frame assembly 300, thereby completing the assembly operation of the entire gooseneck.

[0087] After step 3 of the disassembly method, the cargo platform assembly 400 is parked completely independently on the ground, and is not restricted by the empty or overloaded state. If the cargo platform assembly 400 is in an empty state, multiple cargo platform assemblies 400 can be parked in stacked height on this basis; the small springboard 600 at the ground point of the cargo platform assembly 400 parked on the ground is lowered, and the rear wheel group of the next cargo platform assembly 400 is reversed to the right end of the previous cargo platform assembly 400 through the small springboard 600, so that multiple cargo platform assemblies 400 can be parked in stacked positions.

[0088] In summary, the present invention provides an innovative technology that uses a detachable and liftable special gooseneck device to achieve rapid unhooking and on-site storage of goods together with the cargo platform assembly 400, without a front support device, and with front and rear double loading and unloading, and multiple cargo platform assemblies 400 can be stacked and stored. The ultimate goal is to solve the various problems and inconveniences caused by the permanent connection between the gooseneck and the body of an ordinary gooseneck trailer, increase the usage scenarios, simplify the operation, and reduce the cost.

[0089] Moreover, regardless of whether the vehicle is heavily loaded or unloaded, the transmission path of the traction force and the total mass supporting force of the present invention is: gooseneck assembly → gooseneck lifting hydraulic cylinder → connecting main shaft → connecting frame assembly → traction head assembly → cargo platform assembly, and the components involved in the transmission path are all rigid components; the locking cylinder and locking bolts involved in the disassembly method and assembly method of the present invention are only positioning components, the purpose of which is to make the corresponding components in close contact to maintain the correct position relationship and do not participate in the transmission of force. Therefore, the overall force state of the present invention is statically determinate and reliable, and the operation process is simple and clear.

[0090] Other parts not described belong to the prior art.

Claims

1. A detachable self-lifting gooseneck device, characterized by: It includes a tractor (100), a gooseneck assembly (200), a connecting frame assembly (300), and a cargo platform assembly (400); A gooseneck saddle (110) is provided at the middle of the tractor (100), and a support seat (120) is provided at the right end of the tractor (100); The left end bottom of the gooseneck assembly (200) is provided with a traction pin (210), a gooseneck supporting hydraulic oil cylinder (220) is provided vertically downward in the middle, and a gooseneck lifting hydraulic oil cylinder (230) is provided horizontally to the right in the middle of the gooseneck assembly (200); the traction pin (210) matches the gooseneck saddle (110), and the gooseneck supporting hydraulic oil cylinder (220) matches the support seat (120); the gooseneck lifting hydraulic oil cylinder (230) is connected to the top right end of the connecting frame assembly (300), and the lower right end of the gooseneck assembly (200) is hinged to the bottom left end of the connecting frame assembly (300) through a connecting main shaft (240); A locking oil cylinder (310) is vertically arranged downward in the connecting frame assembly (300); The middle portion of the left end of the cargo platform assembly (400) is connected to the connecting main shaft (240) through the traction head assembly (500); the top of the traction head assembly (500) is provided with a locking groove (510) that matches the end of the piston rod of the locking oil cylinder (310).

2. The detachable self-lifting gooseneck device according to claim 1, characterized in that: Small springboards (600) are hingedly connected to both sides of the left end of the cargo platform assembly (300).

3. The detachable self-lifting gooseneck device according to claim 1, characterized in that: The two traction head assemblies (500) are spaced apart and arranged at the middle of the left end of the cargo platform assembly (400); the left end of the traction head assembly (500) is connected to the connecting main shaft (240) at a position where a tiger's mouth-shaped clamping hole (520) is formed.

4. The detachable self-lifting gooseneck device according to claim 1, characterized in that: The two gooseneck supporting hydraulic cylinders (220) are spaced apart and arranged in the middle of the gooseneck assembly (200).

5. The detachable self-lifting gooseneck device according to claim 1, characterized in that: The gooseneck supporting hydraulic cylinder (220), the gooseneck lifting hydraulic cylinder (230), and the locking cylinder (310) are all connected to the operating handle.

6. The detachable self-lifting gooseneck device according to claim 5, characterized in that: A cylinder seat (250) is transversely arranged in the middle of the gooseneck assembly (200), and a hinge support (260) is arranged at the bottom of the right end; a cylinder ear plate (340) is arranged at the top right end of the connecting frame assembly (300), and a shaft sleeve (320) is arranged at the bottom left end; The left end of the gooseneck lifting hydraulic cylinder (230) is connected to the cylinder seat (250) via a pin shaft (231), and the right end is connected to the cylinder ear plate (340); The connecting main shaft (240) passes through the hinge support (260) and the shaft sleeve (320).

7. The detachable self-lifting gooseneck device according to claim 1, characterized in that: A connecting seat (330) is provided at the bottom right side of the connecting frame assembly (300), and the connecting seat (330) is detachably connected to the traction head assembly (500) via a locking bolt (331).

8. A method for using a detachable self-lifting gooseneck device, characterized in that: Including disassembly and assembly methods; The disassembly method includes the following steps: Step 1, uninstall: When the vehicle is parked, the traction pin (210) is connected to the gooseneck saddle (110); by operating the operating handle of the gooseneck lifting hydraulic cylinder (230), the gooseneck lifting hydraulic cylinder (230) is shortened and the relative angle between the gooseneck assembly (200) and the cargo platform assembly (400) is deflected, so that the left end of the cargo platform assembly (400) is lowered to contact the ground, and the support point is transferred from the gooseneck saddle (110) to the contact point between the cargo platform assembly (400) and the ground, so that the gooseneck assembly (300) is in a non-stressed unloading state; Step 2, Unlock: By operating the operating handle of the locking oil cylinder (310), the locking oil cylinder (310) is retracted and unlocked, and the locking bolt (331) of the connecting seat (330) is loosened, so that the entire gooseneck assembly (200) and the connecting frame assembly (300) are in a completely unlocked state relative to the cargo platform assembly (400); Step 3, Disengagement: By operating the operating handle of the gooseneck supporting hydraulic cylinder (220), the gooseneck assembly (200) and the connecting frame assembly (300) are linked as an integral component and descend along an arc swing trajectory; when the connecting main shaft (240) is disengaged from the tiger's mouth-shaped clamping hole (520) in the traction head assembly (500), the tractor (100) is moved to disengage the gooseneck assembly (200) and the connecting frame assembly (300) from the cargo platform assembly (400), thereby realizing the disassembly and separation action of the gooseneck; The assembly method includes the following steps: Step 1, connect: The traction pin (210) is connected to the gooseneck saddle (110), and the tractor (100), the gooseneck assembly (200) and the connecting frame assembly (300) are close to the cargo platform assembly (400) parked on the ground; by operating the operating handle of the gooseneck supporting hydraulic cylinder (220), the gooseneck assembly (200) and the connecting frame assembly (300) are linked as a whole component to swing along an arc trajectory and descend to the connecting main shaft (240) below the tiger's mouth shape. When the tractor (100) is in contact with the clamping hole (520) of the tiger's mouth shape, the tractor (100) is slightly moved until the connecting main shaft (240) contacts the tiger's mouth shape clamping hole (520); then the operating handle of the gooseneck support hydraulic oil cylinder (220) is continuously operated to make the connecting main shaft (240) slowly swing upward along an arc-shaped swing trajectory until it contacts the upper arc-shaped locking position of the tiger's mouth shape clamping hole (520); at this time, the gooseneck assembly (200) and the connecting frame assembly (300) are connected to the cargo platform assembly (400); Step 2, Lock: The locking bolt (331) is passed through the connecting hole of the traction head assembly (500) and the connecting seat (330) and is tightened so that the two are tightly fitted; then the operating handle of the locking oil cylinder (310) is operated to extend the locking oil cylinder (310), and the locking ball head at the end of the piston rod of the locking oil cylinder (310) is tightly fitted into the locking groove (510) of the traction head assembly (500), completing the locking action of the locking oil cylinder (310); Step 3, lifting: The operating handle of the gooseneck lifting hydraulic cylinder (230) is operated to extend the gooseneck lifting hydraulic cylinder (230), and at the same time, the front end of the cargo platform assembly (400) is driven to rise to the same level as the cargo platform surface of the cargo platform assembly (400) through the relative rotation movement between the gooseneck assembly (200) and the connecting frame assembly (300), thereby completing the assembly operation of the entire gooseneck.

9. The method for using the detachable self-lifting gooseneck device according to claim 8, characterized in that: After step 3 of the disassembly method, the small springboard (600) at the ground contact point of the cargo platform assembly (400) parked on the ground is lowered, and the rear wheel assembly of the next cargo platform assembly (400) is reversed to the right end of the previous cargo platform assembly (400) through the small springboard (600), so that multiple cargo platform assemblies (400) can be parked in a stacked manner.

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