A semi-trailer support device that is easy to disassemble

Abstract

This utility model belongs to the field of trailer support devices and discloses a semi-trailer support device that is easy to disassemble. It includes a support body, a thickened semi-trailer mating plate, quick-release mating parts, thickened base feet, and quick-release hinges, etc., capable of supporting a semi-trailer. A telescopic main rod is driven by a dual-speed gearbox within the support body to adjust the support height, enabling the semi-trailer to be attached and detached. The quick-release mating parts, quick-release hinges, and thickened base feet form a modular connection structure. When the base feet are damaged due to sewage corrosion or scratches from sharp objects, they can be individually disassembled and replaced via the quick-release hinges, avoiding the resource waste caused by replacing the entire unit. The quick-release mating parts can also be quickly replaced when the screw holes are stripped. The hinge structure allows the base feet to adapt to inclined ground, and the waterproof flange further improves the durability of the components. This device effectively solves the problem of existing support devices being easily damaged and difficult to repair, significantly reducing maintenance costs and improving logistics and transportation efficiency and equipment lifespan.

Description

Technical Field

[0001] This utility model relates to the field of trailer support devices, specifically a semi-trailer support device that is easy to disassemble. Background Technology

[0002] In modern logistics and transportation systems, semi-trailers, with their large carrying capacity and high efficiency, have become core equipment for road freight. As a key component enabling independent and stable support after the semi-trailer is separated from the tractor, the performance of the support device directly affects the vehicle's safety and operating costs. Among them, the support feet, as the terminal components in direct contact with the ground, are crucial to the equipment's entire lifecycle management in terms of durability and maintainability. Currently, most semi-trailer support systems on the market suffer from easily damaged and difficult-to-replace bases. These bases are constantly exposed to complex and changing outdoor environments, making them highly susceptible to damage from various factors. Firstly, frequent contact with damp ground, industrial wastewater, and corrosive chemicals causes rust and corrosion in the metal bases. For example, in ports and chemical industrial parks, the average lifespan of bases is shortened by 30% to 50% due to prolonged contact with wastewater containing salt or acids and alkalis. Secondly, encounters with sharp stones, metal fragments, and other sharp objects during transport, as well as accidental impacts during loading and unloading, can cause scratches, dents, and even structural deformation of the bases, weakening their load-bearing capacity.

[0003] What's even more challenging is that existing support devices are mostly designed with integral or non-removable connections. When the base is damaged, maintenance personnel often need to disassemble the entire support device and replace the parts with new ones. This "complete replacement" maintenance model not only consumes a lot of time and manpower but also results in serious waste of resources. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a semi-trailer support device that is easy to disassemble, thereby solving the problem mentioned in the background art that the existing support base needs to be completely replaced after damage.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a semi-trailer support device that is easy to disassemble, comprising: The support body is a standard-shaped support, and a dual-speed gearbox is installed inside the support body. A rocker plate is installed on one side of the support body, and a telescopic main rod is installed at one end of the support body. A thickened semi-trailer mating plate is provided on one side of the support body, and the support body is fixedly installed on the semi-trailer through the thickened semi-trailer mating plate; A quick-release fitting, which is a square block structure, is located on the bottom side of the telescopic main rod; Thickened feet are provided on the side of the quick-release fitting opposite to the telescopic main rod, and the thickened feet contact the ground to provide support. A quick-release hinge is disposed between the quick-release mating part and the thickened base. The thickened base can rotate relative to the support body to adapt to inclined ground.

[0006] Preferably, the support body has an inner groove, the thickened semi-trailer mating disc is engaged in the inner groove, and the thickened semi-trailer mating disc is fixedly installed on the support body by bolts.

[0007] Preferably, the thickened semi-trailer mating plate has two rows of five groups of equidistant mounting holes, with a spacing of 57mm between the mounting holes.

[0008] Preferably, the quick-release fitting has multiple sets of base fitting screw holes on the side opposite to the telescopic main rod, and a recessed hole is provided in the center of the quick-release fitting. Multiple sets of telescopic main rod fixing bolts are provided in the recessed hole, and the quick-release fitting is fixedly connected to the telescopic main rod through the telescopic main rod fixing bolts.

[0009] Preferably, the ends of the telescopic main rod fixing bolts are all machined with internal hexagonal grooves.

[0010] Preferably, the thickened base edges are all provided with waterproof flanges.

[0011] Preferably, the quick-release hinge includes a welded base, hinge lugs, a hinge truncated pyramid, and a quick-release fixing seat. The welded base is welded to the thickened base. The welded base is provided with hinge lugs. The hinge truncated pyramid is hinged to the welded base through the hinge lugs. A quick-release fixing seat is provided on the side of the hinge truncated pyramid away from the welded base. Multiple sets of fixing bolts are provided at the quick-release fixing seat. The fixing bolts are threadedly connected to the screw holes of the base. The quick-release fixing seat is fixedly installed at the bottom of the quick-release fitting by the multiple sets of fixing bolts.

[0012] Compared with the prior art, the present invention provides a semi-trailer support device that is easy to disassemble, and has the following advantages: 1. This easily detachable semi-trailer support device is equipped with a support body, a thickened semi-trailer mating plate, quick-release mating parts, thickened base feet, and quick-release hinge parts. The device can be installed at the bottom of the semi-trailer to achieve the support function. It can assist in the coupling and uncoupling of the semi-trailer. The device has a very long service life and is not easily damaged. If the base feet are damaged, they can be disassembled and replaced separately. The key parts of the support can be reused to avoid waste.

[0013] 2. It is equipped with a thickened semi-trailer mating plate and an inner groove. The inner groove creates a larger space for the semi-trailer mating plate, which can be made thicker, preventing damage to the mating plate and greatly improving the service life of the device.

[0014] 3. It is equipped with thickened feet. By increasing the thickness of the feet and adding waterproof flanges, the service life of the feet can be greatly improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inner groove and the thickened semi-hanging mating disc structure of this utility model; Figure 3 This is a schematic diagram of the quick-release assembly structure of this utility model; Figure 4 This is a schematic diagram of the quick-release hinge structure of this utility model.

[0016] In the diagram: 1. Support body; 2. Telescopic main rod; 3. Thickened semi-trailer mating plate; 4. Quick-release mating parts; 5. Thickened base; 6. Quick-release hinge; 7. Inner groove; 8. Mounting hole; 9. Base mating screw hole; 10. Recessed hole; 11. Telescopic main rod fixing bolt; 12. Hexagonal socket; 13. Waterproof flange; 14. Welded chassis; 15. Hinge truncated pyramid; 16. Quick-release fixing seat; 17. Fixing bolt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 This utility model provides a technical solution: A semi-trailer support device that is easy to disassemble, comprising: Support body 1 is a standard support. A dual-speed gearbox is installed inside the support body 1. A rocker plate is installed on one side of the support body 1. A telescopic main rod 2 is installed at one end of the support body 1. The entire support body 1 can use standard parts according to current specifications or some self-developed reinforced models.

[0019] Thickened semi-trailer mating plate 3 is provided on one side of the support body 1, and the support body 1 is fixedly installed on the semi-trailer through the thickened semi-trailer mating plate 3; Quick-release fitting 4, which is a square block structure, is located on the bottom side of the telescopic main rod 2; Thickened base foot 5 is located on the side of quick-release fitting 4 away from telescopic main rod 2, and the thickened base foot 5 contacts the ground to achieve the support function; The quick-release hinge 6 is located between the quick-release mating part 4 and the thickened base 5. The thickened base 5 can rotate relative to the supporting body 1 to adapt to the inclined ground.

[0020] Furthermore, the support body 1 has an inner groove 7, and the thickened semi-hanging mating plate 3 is snapped into the inner groove 7. The thickened semi-hanging mating plate 3 is fixedly installed on the support body 1 by bolts. The bolt fixing needs to avoid the internal dual-speed gearbox. For the upper part, welding, gluing or other methods can be used for fixing.

[0021] Furthermore, the thickened semi-trailer mating plate 3 has two rows of five sets of equidistant mounting holes 8, with a spacing of 57mm between the mounting holes 8. This is designed to be a composite standard size for easy support and use.

[0022] Furthermore, the quick-release fitting 4 has multiple sets of base fitting screw holes 9 on the side opposite to the telescopic main rod 2, and a recessed hole 10 is provided in the center of the quick-release fitting 4. Multiple sets of telescopic main rod fixing bolts 11 are installed in the recessed hole 10. The quick-release fitting 4 is fixedly connected to the telescopic main rod 2 through the telescopic main rod fixing bolts 11. The quick-release fitting 4 serves as a bridge connecting the thickened base 5 and the telescopic main rod 2. In most cases, the quick-release fitting 4 is always fixed to the bottom of the telescopic main rod 2. However, after repeated use, the base fitting screw holes 9 may deform and strip. In this case, the entire quick-release fitting 4 can be replaced.

[0023] Furthermore, the ends of the telescopic main rod fixing bolts 11 are all machined with internal hexagonal slots 12. Since it is inconvenient to tighten them inside the recessed holes 10, the use of internal hexagonal slots can improve the ease of use.

[0024] Furthermore, the thickened base 5 is equipped with waterproof flanges 13 along its edges.

[0025] Furthermore, the quick-release hinge 6 includes a welded base 14, hinge lugs, a hinge truncated pyramid 15, and a quick-release fixing seat 16. The welded base 14 is welded to the thickened base 5. The welded base 14 is provided with hinge lugs. The hinge truncated pyramid 15 is hinged to the welded base 14 through the hinge lugs. The quick-release fixing seat 16 is provided on the side of the hinge truncated pyramid 15 away from the welded base 14. Multiple sets of fixing bolts 17 are provided at the quick-release fixing seat 16. The fixing bolts 17 are threadedly connected to the screw holes 9 of the base. The quick-release fixing seat 16 is fixedly installed at the bottom of the quick-release mating part 4 through multiple sets of fixing bolts 17.

[0026] Structural Description: Support body 1: Standard support structure with a dual-speed gearbox inside, a rocker plate on one side and a telescopic main rod 2 connected to the other end. The dual-speed gearbox drives the support function and height adjustment. Telescopic main rod 2: A rod-shaped structure connected to one end of the support body 1, which can be raised and lowered vertically under the drive of a dual-speed gearbox, and is used to adjust the height of the semi-trailer; Thickened semi-trailer mating disc 3: A disc-shaped structure set on one side of the support body 1, which is snapped onto the support body 1 through the inner groove 7 and fixed by bolts. It has two rows of five sets of equidistant mounting holes 8 (57mm apart) for fixing the support body 1 on the semi-trailer. Quick-release fitting 4: a square block structure, set on the bottom side of the telescopic main rod 2, with multiple sets of foot fitting screw holes 9 on the side away from the telescopic main rod 2, and the telescopic main rod fixing bolt 11 is fixedly connected to the telescopic main rod 2 in the central recessed hole 10, serving as a bridge connecting the telescopic main rod 2 and the thickened foot 5; Thickened base 5: A support structure set on the side of the quick-release fitting 4 away from the telescopic main rod 2, which contacts the ground to provide support, and has a waterproof flange 13 on the edge to improve durability; Quick-release hinge 6: A connection structure set between quick-release mating part 4 and thickened base 5, including a welded base 14, hinge lugs, hinge truncated pyramid 15 and quick-release fixing seat 16. The welded base 14 is welded to the thickened base 5. The hinge truncated pyramid 15 is hinged to the welded base 14 through the hinge lugs. The quick-release fixing seat 16 is connected to the base mating screw hole 9 of the quick-release mating part 4 through fixing bolts 17, so that the thickened base 5 can rotate relative to the supporting body 1 to adapt to the inclined ground. Inner groove 7: A groove formed on the support body 1, used to engage the thickened semi-trail mating disc 3, and to reserve thickened space for it to enhance load-bearing capacity; Mounting hole 8: Two rows of five sets of equidistant holes (57mm spacing) are opened on the thickened semi-trailer mating plate 3 for fixed installation with the semi-trailer chassis to ensure the compatibility of the device with the vehicle; Bottom foot mating screw hole 9: A screw hole set on the side of the quick-release mating part 4 away from the telescopic main rod 2, used to connect with the fixing bolt 17 of the quick-release hinge part 6 to realize the installation of the thickened bottom foot 5; Hole 10: A hole located in the center of the quick-release fitting 4, which is fitted with a telescopic main rod fixing bolt 11 for fixing the quick-release fitting 4 to the telescopic main rod 2. Telescopic main rod fixing bolt 11: The bolt located in the recessed hole 10 is used to fix the quick-release fitting 4 to the telescopic main rod 2. The end is machined with an internal hexagonal groove 12 to facilitate screwing. Hexagonal groove 12: A hexagonal groove machined at the end of the telescopic main rod fixing bolt 11, which facilitates tightening the bolt in the narrow space of the recessed hole 10; Waterproof flange 13: A flange structure set on the edge of the thickened base 5 to prevent sewage and mud from entering the connection part and improve the durability of the base; Welded chassis 14: a component of quick-release hinge 6, welded to thickened base 5, and provided with hinge lugs to connect to hinge frustum 15; Hinged frustum 15: A component of quick-release hinge 6, which is hinged to the welded base 14 via hinge lugs. There is a quick-release fixing seat 16 on the side away from the welded base 14, so that the thickened base 5 can rotate to adapt to the inclined ground. Quick-release mounting base 16: A component of quick-release hinge 6, located on the side of hinge frustum 15 away from the welded base 14, and equipped with multiple sets of fixing bolts 17, which are connected to the bottom foot screw holes 9 of quick-release mating part 4 through the bolts. Fixed bolt 17: A bolt located at the quick-release mounting base 16, which is threaded to the bottom screw hole 9 of the quick-release mating part 4, and is used to fix the quick-release hinge 6 and the quick-release mating part 4.

[0027] Working Principle: When the semi-trailer needs to be separated from the tractor, the operator drives the dual-speed gearbox inside the support body 1 by cranking the crank. The dual-speed gearbox has two transmission ratios: the high-speed gear allows for rapid lifting and lowering, facilitating efficient adjustment of the semi-trailer height; the low-speed gear provides greater torque for stable lifting of the vehicle under heavy loads. The rotation of the gearbox drives the telescopic main rod 2 to rise and fall vertically. By controlling the number of rotations and direction of the crank, the front of the semi-trailer is adjusted to a suitable height, creating conditions for uncoupling. After uncoupling, the support body 1, through the quick-release fitting 4 at the bottom of the telescopic main rod 2 and the thickened base 5, stably transfers the weight of the semi-trailer to the ground, achieving reliable support. In terms of structural connection, the thickened semi-trailer mating plate 3 is engaged with the support body 1 through the inner groove 7 and secured with bolts. This design not only ensures a tight connection between the mating plate and the support body but also provides thickened space for the mating plate through the inner groove, enhancing its load-bearing capacity and resistance to deformation. The mounting holes 8, arranged in two rows of five groups at equal intervals with a spacing of 57mm on the mating plate, conform to standard dimensions, facilitating fixed installation with the semi-trailer chassis and ensuring the compatibility and stability of the support device with the vehicle structure. The quick-release mating part 4, a key component connecting the telescopic main rod 2 and the thickened base 5, is firmly connected to the bottom of the telescopic main rod via the telescopic main rod fixing bolt 11 within the recessed hole 10. The internal hexagonal groove 12 design at the bolt end solves the problem of limited space within the recessed hole, facilitating quick assembly and disassembly. The base mating screw hole 9 on the side of the quick-release mating part 4 opposite to the telescopic main rod is used to connect the quick-release hinge part 6. Under normal use, the quick-release mating part 4 is firmly fixed to the bottom of the telescopic main rod. When the screw hole becomes deformed and stripped due to long-term use, the entire quick-release mating part 4 can be quickly replaced by removing the telescopic main rod fixing bolt 11, avoiding the impact of localized damage on the entire support device. The quick-release hinge part 6 enables a flexible connection between the thickened base 5 and the quick-release mating part 4. The welded chassis 14 and the thickened base 5 are welded together to form a stable whole. The hinged structure of the hinged lug and the hinged frustum 15 gives the thickened base the ability to rotate relative to the supporting body 1. When the semi-trailer is parked on an inclined or uneven surface, the thickened base can automatically adjust its angle under the action of the hinged structure to ensure full contact with the ground, ensuring uniform force distribution and avoiding damage caused by local stress concentration. The quick-release fixing seat 16 on the other side of the hinged frustum 15 is threadedly connected to the base mating screw hole 9 of the quick-release fitting 4 by multiple sets of fixing bolts 17. This design not only ensures the connection strength, but also facilitates quick disassembly and replacement by simply unscrewing the fixing bolts when the base is damaged, without having to disassemble the entire support device. The waterproof flange 13 on the edge of the thickened base 5 can effectively prevent sewage, mud, and other debris from entering the connection part, reducing damage to the components caused by corrosion and wear, and extending the service life of the base. During the semi-trailer coupling operation, the operator reverses the crank to drive the telescopic main rod 2 to descend, lowering the front of the semi-trailer to a suitable height so that the tractor can smoothly dock with the semi-trailer and complete the coupling operation.Throughout the process, the support device, through the coordinated work of its various components, achieves efficient, stable, and convenient support and adjustment functions. At the same time, its modular design and quick-release structure greatly improve the maintainability and service life of the device.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-trailer support device that is easy to disassemble, characterized in that, include: Support body (1), the support body (1) is a standard support, a dual-speed gearbox is provided inside the support body (1), a rocker plate is provided on one side of the support body (1), and a telescopic main rod (2) is provided at one end of the support body (1). Thickened semi-trailer mating plate (3), the thickened semi-trailer mating plate (3) is disposed on one side of the support body (1), the support body (1) is fixedly installed on the semi-trailer by the thickened semi-trailer mating plate (3); Quick-release fitting (4), the quick-release fitting (4) is a square block structure, and the quick-release fitting (4) is located on the bottom side of the telescopic main rod (2); Thickened base (5), the thickened base (5) is provided on the side of the quick-release fitting (4) away from the telescopic main rod (2), the thickened base (5) contacts the ground to achieve the support function; Quick-release hinge (6) is disposed between the quick-release mating part (4) and the thickened base (5). The thickened base (5) can rotate relative to the support body (1) to adapt to the inclined ground. The quick-release fitting (4) has multiple sets of bottom screw holes (9) on the side away from the telescopic main rod (2). The quick-release fitting (4) has a recessed hole (10) in the center. Multiple sets of telescopic main rod fixing bolts (11) are provided in the recessed hole (10). The quick-release fitting (4) is fixedly connected to the telescopic main rod (2) through the telescopic main rod fixing bolts (11).

2. The easily detachable semi-trailer support device according to claim 1, characterized in that, The support body (1) has an inner groove (7), the thickened semi-trailer mating disc (3) is snapped into the inner groove (7), and the thickened semi-trailer mating disc (3) is fixedly installed on the support body (1) by bolts.

3. The easily detachable semi-trailer support device according to claim 1, characterized in that, The thickened semi-trailer mating plate (3) has two rows of five sets of equidistant mounting holes (8), with a spacing of 57mm between the mounting holes (8).

4. The easily detachable semi-trailer support device according to claim 1, characterized in that, The ends of the telescopic main rod fixing bolts (11) are all machined with internal hexagonal grooves (12).

5. A semi-trailer support device that is easy to disassemble according to claim 1, characterized in that, The thickened base (5) is provided with waterproof flanges (13) at its edges.

6. A semi-trailer support device that is easy to disassemble according to claim 1, characterized in that, The quick-release hinge (6) includes a welded base (14), hinge lugs, a hinge truncated pyramid (15), and a quick-release fixing seat (16). The welded base (14) is welded to the thickened base (5). The welded base (14) is provided with hinge lugs. The hinge truncated pyramid (15) is hinged to the welded base (14) through the hinge lugs. The side of the hinge truncated pyramid (15) facing away from the welded base (14) is provided with a quick-release fixing seat (16). The quick-release fixing seat (16) is provided with multiple sets of fixing bolts (17). The fixing bolts (17) are threadedly connected to the base mating screw holes (9). The quick-release fixing seat (16) is fixedly installed at the bottom of the quick-release mating part (4) through multiple sets of fixing bolts (17).

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