Rollover self-dumping semitrailer

Abstract

The invention relates to the technical field of semitrailers, and discloses a side-turning self-dumping semitrailer which comprises a semitrailer body, a carriage, a driving mechanism and a movable side carriage door, and a side baffle structure and a door locking structure corresponding to the movable side carriage door are arranged on a lower side beam of the carriage. The side baffle structure comprises a baffle, a balance weight beam arranged on the top of the outer side face of the baffle and a plurality of supporting pipes vertically arranged on the baffle, and the bottoms of the supporting pipes are connected with a lower side beam pivot of the carriage. The side baffle structure and the door locking structure of the rollover self-dumping semitrailer can be opened and closed by ingeniously utilizing the rollover acting force of the carriage, the reliability is high, additional power sources (such as an oil cylinder and an air cylinder) do not need to be arranged, the manufacturing cost and the maintenance cost are reduced, and meanwhile the oil leakage risk is avoided. Due to the linkage design of the movable side compartment door and the baffle, the unloading process is smoother, manual intervention is not needed, and the problem that tires are prone to being buried by goods during unloading of an existing side-tipping dumper is fundamentally solved.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-trailers, and particularly to a side-tipping self-unloading semi-trailer. Background Art

[0002] In the field of modern logistics transportation, side-tipping self-unloading semi-trailers play an important role in the transportation of loose goods due to their unique advantages. When unloading, the carriage of this type of semi-trailer can automatically tilt at a certain angle, causing the goods to flow out automatically from the movable side compartment door under the action of gravity, achieving unloading, and thus having a relatively high market coverage rate. Especially during the transportation of loose goods such as sand and gravel, soil, and coal, side-tipping self-unloading semi-trailers fully demonstrate the advantages of high transportation efficiency and short transportation cycle, playing an irreplaceable role and providing strong support for the efficient operation of related industries.

[0003] However, there are obvious defects in the current side-tipping self-unloading vehicles on the market. During the unloading process, the goods are likely to bury the tires, which not only causes the vehicle to slip but also often traps the vehicle after unloading, making it difficult to drive out of the unloading area by its own power. To solve this problem, external forces are often required, such as using a tractor to tow or manually clearing the surrounding goods to get the vehicle out. This operation not only consumes a large amount of manpower and material resources, with a cumbersome and complex process, but also has a high safety risk during the operation, easily triggering safety accidents and posing potential threats to personnel and vehicles.

[0004] Although the patent (CN 212386379U) discloses that the baffle is driven by an oil cylinder to move down to one side of the wheel, and at the same time, the limit on the movable side compartment door is released, so that the baffle can avoid the accumulation of goods and materials to submerge the tires during the unloading process, the baffle requires an oil cylinder as a driving source, which not only has a high manufacturing cost, requires manual control, but also requires additional oil circuits to be arranged, with a risk of oil leakage.

[0005] It can be seen that the existing technology still needs to be improved. Summary of the Invention

[0006] In view of the above deficiencies of the existing technology, the purpose of the present invention is to provide a side-tipping self-unloading semi-trailer, aiming to solve the technical problem that although the existing side-tipping self-unloading semi-trailer is equipped with a baffle to avoid the accumulation of goods and materials to submerge the tires, an additional driving source is required to manually trigger the movement of the baffle.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A side-tipping semi-trailer includes a semi-trailer body, a carriage that can be side-tipped on the semi-trailer body, and a driving mechanism for driving the carriage to tip over. The upper side beam of the carriage is provided with a plurality of movable side compartment doors pivotally connected thereto. The lower side beam of the carriage is provided with a side baffle structure and a door locking structure corresponding to the movable side compartment doors. The side baffle structure includes a baffle, a counterweight beam provided at the top of the outer side surface of the baffle, and a plurality of support pipes vertically provided on the baffle. The bottom of the support pipe is pivotally connected to the lower side beam of the carriage. When the carriage is in a non-tipped state, the movable side compartment door forms a closure with the lower side beam of the carriage. The baffle is located outside the movable side compartment door and blocks the movable side compartment door and the baffle from opening outwards through the door locking structure. When the carriage tips over for unloading, the door locking structure automatically unlocks and disengages from the baffle. The movable side compartment door swings away from the lower side beam of the carriage to form a discharge opening. The baffle flips downwards and guides the materials in the carriage to flow out in a direction away from the vehicle tires.

[0009] As a further improvement of the above technical solution, the baffle includes a first flat plate, an outer inclined plate, and a second flat plate connected in sequence from top to bottom. The support pipe is welded on the outer surface of the first flat plate and extends through the outer inclined plate and the second flat plate towards the lower side beam of the carriage.

[0010] As a further improvement of the above technical solution, a plurality of groups of lugs are provided on the lower side beam of the carriage, and the number of lugs is the same as and corresponds one by one to the number of support pipes. A rotating shaft is fixedly provided on the lugs. A bushing is provided at the bottom of the support pipe and is sleeved on the rotating shaft.

[0011] As a further improvement of the above technical solution, a grease nipple for lubricating the rotating shaft is installed on the bushing.

[0012] As a further improvement of the above technical solution, the support pipe is a rectangular pipe and there are three of them. The three support pipes are arranged at intervals from left to right on the baffle.

[0013] As a further improvement of the above technical solution, the door locking structure includes a pull rod, a lock plate, a first pivot provided at the bottom of the lower side beam of the carriage, and a second pivot provided on the main beam of the semi-trailer body. The second pivot is located behind the first pivot. The middle part of the lock plate is rotatably connected around the first pivot. A kidney-shaped hole is provided at the rear end of the pull rod. The second pivot passes through the kidney-shaped hole to form a connection with the pull rod. A third pivot is provided at the rear end of the pull rod and the rear end of the lock plate is rotatably connected around the third pivot. The front half of the lock plate is used to block the movable side compartment door from opening outwards. A top pin for pressing down the pull rod to drive the front half of the lock plate to block the movable side compartment door from opening outwards is further provided at the bottom of the carriage.

[0014] As a further improvement of the above technical solution, the top pin includes a bolt provided upwards and a cylinder horizontally welded at the bottom of the bolt. A nut threadedly connected to the bolt is fixedly provided on the carriage.

[0015] As a further improvement of the above technical solution, a flat plate and two first ear plates symmetrically arranged at the bottom of the flat plate are provided at the bottom of the lower side beam of the car body, a first mounting hole is opened on the first ear plate, and the first pivot passes through the two first mounting holes and is fixed by a cotter pin.

[0016] As a further improvement of the above technical solution, two symmetrically arranged second ear plates are provided on the beam of the semi-trailer body, and second mounting holes are opened on the second ear plates. The second pivot passes through the two second mounting holes and is fixed by a cotter pin.

[0017] As a further improvement of the above technical solution, the pull rod includes a long rod body and two short plates symmetrically arranged on the front end of the long rod body, a third mounting hole is opened on the short plate, and the third pivot passes through the two third mounting holes and is fixed by a cotter pin.

[0018] Beneficial effects of the present invention: The side baffle structure and the door lock structure of the rollover dump trailer provided by the present invention can be opened and closed by cleverly utilizing the rollover force of the vehicle compartment, and have high reliability. No additional power source (such as oil cylinder, air cylinder, etc.) is required, which reduces manufacturing cost and maintenance cost, and avoids the risk of oil leakage. The linkage design of the movable side compartment door and the baffle makes the unloading process smoother, without the need for manual intervention, and fundamentally solves the problem that the tires are easily buried by cargo when unloading the existing rollover dump trucks. The automatic unlocking and resetting function of the door lock structure reduces the need for manual operation, reduces the safety risks during operation, and protects the safety of personnel and vehicles. During the unloading process of the vehicle, the tires can always be kept in a safe state, and the vehicle can drive away directly after unloading the cargo, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the movable side door, side baffle structure and door lock structure of the rollover dump semi-trailer in the closed state.

[0020] Figure 2 for Figure 1 Magnified view of area A.

[0021] Figure 3 It is a schematic diagram of the movable side door, side baffle structure and door lock structure of the rollover dump semi-trailer in the open state.

[0022] Figure 4 for Figure 3 Magnified view of area B.

[0023] Figure 5 It is a three-dimensional diagram of the side baffle structure.

[0024] Figure 6 This is the left side view of the side baffle structure.

[0025] Figure 7 Isometric view of the door locking structure.

[0026] Figure 8 Front view of the door locking structure.

[0027] Figure 9 Schematic diagram of the side compartment door locking structure and the door locking structure when the carriage is not overturned.

[0028] Figure 10 Schematic diagram of the side compartment door locking structure and the door locking structure when the carriage is tilted at 15°.

[0029] Figure 11 Schematic diagram of the side compartment door locking structure and the door locking structure when the carriage is tilted at 45°.

[0030] Description of main component symbols: M - side baffle structure, 1 - baffle, 11 - first flat plate, 12 - outer inclined plate, 13 - second flat plate, 14 - notch, 2 - counterweight beam, 3 - support pipe, 41 - carriage, 42 - lower side beam, 43 - upper side beam, 44 - movable side compartment door, 45 - discharge opening, 46 - main beam, 51 - ear, 52 - rotating shaft, 53 - bushing, 54 - grease nipple, H - door locking structure, 6 - tie rod, 61 - kidney-shaped hole, 62 - long rod body, 63 - short plate, 7 - lock plate, 71 - front half, 72 - rear half, 81 - first pivot, 82 - second pivot, 83 - third pivot, 84 - flat plate, 85 - first ear plate, 86 - second ear plate, 87 - split pin, 9 - top pin, 91 - bolt, 92 - cylinder, 93 - nut. Detailed implementation

[0031] The present invention provides a tipping semi-trailer. To make the purpose, technical solution and effects of the present invention clearer and more definite, the following further elaborates the present invention with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0032] Please refer to Figures 1 to 6, the present invention provides a side-tipping semi-trailer, which includes a semi-trailer body, a carriage 41 that can be side-tipped on the semi-trailer body, and a driving mechanism for driving the side-tipping of the carriage 41. A plurality of movable side compartment doors 44 pivotally connected thereto are provided on the upper side beam 43 of the carriage 41. A side baffle structure M and a door locking structure H corresponding to the movable side compartment doors 44 are provided on the lower side beam 42 of the carriage 41. The side baffle structure M includes a baffle 1, a counterweight beam 2 provided at the top of the outer side surface of the baffle 1, and a plurality of support pipes 3 vertically provided on the baffle 1. The bottom of the support pipe 3 is pivotally connected to the lower side beam 42 of the carriage 41. When the carriage 41 is in a non-side-tipping state, the movable side compartment door 44 and the lower side beam 42 of the carriage 41 form a closure, and the baffle 1 is located outside the movable side compartment door 44 and blocks the outward opening of the movable side compartment door 44 and the baffle 1 through the door locking structure H. When the carriage 41 is side-tipped for unloading, the door locking structure H automatically unlocks and disengages from the baffle 1, and the movable side compartment door 44 swings away from the lower side beam 42 of the carriage 41 to form a discharge opening 45. The baffle 1 flips downward and guides the materials in the carriage 41 to flow out in a direction away from the vehicle tires. In practical applications, the driving mechanism can specifically adopt a hydraulic cylinder. A single hydraulic cylinder is configured to drive the carriage 41 to achieve single-sided side-tipping, or two hydraulic cylinders are configured to drive the carriage 41 to achieve double-sided side-tipping.

[0033] Refer to Figure 1 , Figure 2 and Figure 9 , when the carriage 41 is in a non-side-tipping state, the movable side compartment door 44 and the lower side beam 42 of the carriage 41 are tightly closed to ensure the safety and stability of the goods during transportation and prevent the goods from spilling. At this time, the baffle 1 is in a closed state, located outside the movable side compartment door 44 and blocking the outward opening of the movable side compartment door 44 and the baffle 1 through the door locking structure H. The support pipes 3 are vertically provided on the baffle 1, and the bottom thereof is pivotally connected to the lower side beam 42 of the carriage 41 to maintain the stable position of the baffle 1. It can be understood that when the baffle 1 is in a closed state, in addition to playing a limiting role, the door locking structure H can also push the baffle 1 inward to tightly press the movable side compartment door 44, improving the closing ability of the movable side compartment door 44 and the lower side beam 42. The baffle 1 is equivalent to adding a material blocking barrier on the basis of the movable side compartment door 44. The counterweight beam 2 is behind the baffle 1 and has a strengthening effect to prevent fine bulk goods from leaking outwards, which is beneficial to improving the safety of transporting bulk granular materials.

[0034] Refer to Figure 3 , Figure 4 , Figure 10 and Figure 11When it is necessary to roll over and unload the goods, the driving mechanism drives the carriage 41 to gradually roll over, and the tilt angle continues to increase. The lock door structure H automatically unlocks and disengages from the baffle 1 under the action of the rollover of the carriage 41. The movable side door 44 swings outward under the action of gravity, gradually moving away from the lower side beam 42 of the carriage 41, thereby forming a discharge port 45, and the goods in the carriage 41 automatically flow out. At the same time, due to its own structural design and the influence of the overturning force of the lower side beam 42 of the carriage 41, the baffle 1 begins to flip downward autonomously. Since the counterweight beam 2 is heavier than the baffle 1, it is conducive to the automatic opening of the baffle 1 under the action of gravity when it is opened. In the process of the baffle 1 flipping downward, the baffle 1 blocks the vehicle tires, changes the original flow direction of the materials, guides the materials in the carriage 41 to flow out in the direction away from the vehicle tires, and prevents the materials from burying the tires. In this process, the support pipe 3, on the one hand, serves as a supporting structure of the baffle 1 to ensure the stability of the baffle 1 during the flipping process; on the other hand, its pivot connection design enables the baffle 1 to flexibly flip to meet the unloading needs. It can be understood that the lock plate of the door lock structure H supports the back side of the baffle 1 to limit the baffle 1 to maintain a suitable inclination when working.

[0035] After unloading, the carriage 41 is reset, and the side baffle structure M and the door lock structure H are also automatically reset and closed. The door lock structure H again restricts the opening of the movable side compartment door 44, and the bulk cargo accumulated on the baffle 1 will automatically detach from the baffle 1 and be unloaded, so that the vehicle can drive away directly, improving work efficiency.

[0036] The side baffle structure M and the door lock structure H of the rollover dump trailer provided by the present invention can be opened and closed by cleverly utilizing the rollover force of the car body 41. They are highly reliable and do not require an additional power source (such as an oil cylinder, an air cylinder, etc.), thereby reducing manufacturing and maintenance costs and avoiding the risk of oil leakage. The linkage design of the movable side compartment door 44 and the baffle 1 makes the unloading process smoother without manual intervention, fundamentally solving the problem that the tires are easily buried by cargo when unloading the existing rollover dump trucks. The automatic unlocking and resetting functions of the door lock structure H reduce the need for manual operation, reduce safety risks during operation, and protect the safety of personnel and vehicles. During the unloading process of the vehicle, the tires can always remain in a safe state, and the vehicle can drive away directly after unloading the cargo, thereby improving work efficiency.

[0037] For details, see Figure 5 and Figure 6, the baffle 1 includes a first flat plate 11, an outer inclined plate 12, and a second flat plate 13 connected in sequence from top to bottom. The support pipe 3 is welded to the outer surface of the first flat plate 11 and extends through the outer inclined plate 12 and the second flat plate 13 towards the lower side beam 42 of the carriage 41. A notch 14 is provided on the baffle 1 for installing the support pipe 3, which not only ensures the stability of the installation of the support pipe 3 but also prevents interference between the side baffle structure M and the carriage 41 during opening and closing rotation. The support pipe 3 is welded to the outer surface of the first flat plate 11 and extends through the outer inclined plate 12 and the second flat plate 13 towards the lower side beam 42 of the carriage 41. This structural design not only enhances the overall stability of the baffle 1 but also enables the side baffle 1 to maintain a smooth operating state during frequent opening and closing processes, reducing the probability of component wear and failure caused by structural interference, extending the service life of the side baffle structure M of the entire side dump semi-trailer, and reducing the maintenance frequency and cost.

[0038] In this embodiment, the baffle 1 is made by bending a single steel plate. Compared with the method of splicing and assembling multiple components, the production process is greatly simplified. This not only reduces the processing procedures of parts but also reduces material loss and labor costs, improves production efficiency, and has significant cost advantages in large-scale production.

[0039] In the open state of the side baffle 1, the inclination angle of the outer inclined plate 12 can accurately guide the flow direction of bulk goods. While enabling the goods to flow out smoothly, it effectively blocks the goods from burying the tires, ensuring the safety and smoothness of the unloading process. When the side baffle 1 is closed, the bulk goods accumulated on the baffle 1 can automatically slide down along the inclination directions of the outer inclined plate 12 and the second flat plate 13 for unloading, without the need for additional manual cleaning, reducing labor input, improving unloading efficiency, and saving time costs for logistics transportation.

[0040] See Figure 5 As shown, a plurality of groups of lugs 51 with the same number as and corresponding to the support pipes 3 are provided on the lower side beam 42 of the carriage 41. The lugs 51 are precisely matched with the support pipes 3, ensuring that each support pipe 3 has a stable support point and improving the overall stability of the baffle 1 during the working process. A rotating shaft 52 is fixed on the lug 51, and a bushing 53 sleeved on the rotating shaft 52 is provided at the bottom of the support pipe 3. The matching design of the bushing 53 and the rotating shaft 52 enables the support pipe 3 to rotate flexibly around the axis. When the carriage 41 is tilted for unloading, the baffle 1 can quickly and smoothly flip downward to timely guide the material flow direction. This flexible rotating structure greatly improves the convenience of unloading operations, shortens the unloading time, and further enhances the working efficiency of the side dump semi-trailer.

[0041] Further, an oil nozzle 54 for lubricating the rotating shaft 52 is installed on the bushing 53. The oil nozzle 54 installed on the bushing 53 can lubricate the rotating shaft 52 conveniently and quickly. By regularly injecting lubricating oil through the oil nozzle 54, an effective lubricating film can be formed between the bushing 53 and the rotating shaft 52, further reducing the friction coefficient when the two rotate relative to each other. This can not only reduce the heat generated by friction and prevent components from being damaged due to overheating, but also significantly reduce wear, make the rotation of the support pipe 3 smoother, thereby maintaining the stable working state of the baffle 1 and further extending the service life of the entire connection structure.

[0042] Refer to Figure 5 and Figure 6 , the support pipes 3 are rectangular pipes and there are three of them. The three support pipes 3 are arranged at intervals from left to right on the baffle 1. The layout of the three support pipes 3 is carefully designed, which not only ensures the stability of the baffle 1, but also does not occupy too much space, making the entire side baffle structure M more compact and reasonable. This layout is applicable to side dump semi-trailers with different sizes and load capacities, improving the versatility and market adaptability of the product and meeting the diverse customer needs.

[0043] Specifically, refer to Figure 7 and Figure 8 , the door locking structure H includes a pull rod 6, a lock plate 7, a first pivot 81 provided at the bottom of the lower side beam 42 of the carriage 41, and a second pivot 82 provided on the main beam 46 of the semi-trailer body. The second pivot 82 is located behind the first pivot 81. The middle part of the lock plate 7 is rotatably connected around the first pivot 81. A kidney-shaped hole 61 is provided at the rear end of the pull rod 6, and the second pivot 82 passes through the kidney-shaped hole 61 to form a connection with the pull rod 6. A third pivot 83 is provided at the rear end of the pull rod 6, and the rear end of the lock plate 7 is rotatably connected around the third pivot 83. The front half 71 of the lock plate 7 is used to block the movable side door 44 from opening outwards. A top pin 9 for pressing down the pull rod 6 to drive the front half 71 of the lock plate 7 to block the movable side door 44 from opening outwards is further provided at the bottom of the carriage 41.

[0044] During the loading and transportation stages, the carriage 41 is in a flat state. The top pin 9 applies downward pressure to the pull rod 6, causing the pull rod 6 to have a downward swinging tendency with the second pivot 82 connected to the vehicle main beam 46 as the fulcrum. This not only causes the lock plate 7 to rotate around the first pivot 81, but also makes the front half 71 of the lock plate 7 rotate to a position where it blocks the baffle 1 or presses against the baffle 1, so that the movable side door 44 and the baffle 1 cannot be opened outwards, realizing the locking of the movable side door 44 and the baffle 1 and ensuring the safety of the goods during transportation.

[0045] When entering the unloading process, the carriage 41 starts to gradually tilt, the tilt angle continuously increases, and the top pin 9 moves away from the pull rod 6. During this process, the first pivot 81 swings backward as the carriage 41 tilts. Driven by the lock plate 7 and the third pivot 83, the pull rod 6 retracts synchronously. The second pivot 82 slides in the kidney-shaped hole 61, and the lock plate 7 also rotates in the reverse direction around the first pivot 81, so that the front half 71 of the lock plate 7 leaves the position blocking the baffle 1. At this time, the movable side compartment door 44 can swing around the pivot connection point with the upper side beam 43 of the carriage 41 and open smoothly, and the goods flow out automatically from the movable side compartment door 44 by gravity to complete the unloading.

[0046] After unloading, the carriage 41 resets, and the movable side compartment door 44, the baffle 1, and the lock plate 7 also automatically reset and close. The lock plate 7 restricts the opening of the movable side compartment door 44 and the baffle 1 again, so that the vehicle can drive away directly, improving the work efficiency.

[0047] The door locking structure H has the advantages of simple structure, light self-weight, long service life, and reduced maintenance cost. It cleverly uses the tilting power of the carriage 41 to synchronously drive the lock plate 7 to swing and lock or disengage from the movable side compartment door 44 and the baffle 1 without manual operation, greatly improving the reliability and stability of the locking of the movable side compartment door 44, ensuring the safety of the whole transportation process, and also automatically unlocking the movable side compartment door 44, making the operation more smooth and efficient, and further improving the unloading efficiency.

[0048] Specifically, referring to Figure 7 and Figure 8 , the top pin 9 includes a bolt 91 arranged upward and a cylinder 92 horizontally welded to the bottom of the bolt 91. The carriage 41 is fixedly provided with a nut 93 threadedly connected to the bolt 91. The top pin 9 adopts the threaded connection design of the bolt 91 and the nut 93, and the protruding height of the cylinder 92 can be precisely adjusted by rotating the bolt 91. This adjustment function can adapt to the locking force required under different cargo weights or compensate for the slight deformation of the movable side compartment door 44 caused by long-term use to ensure the locking reliability. In addition, compared with the traditional single-point contact structure, the bottom surface of the cylinder 92 comes into contact with the top surface of the pull rod 6 first, and the contact area is larger, so that the downward pressure of the top pin 9 can be evenly transmitted to the pull rod 6, avoiding the fatigue damage of components caused by local stress concentration and extending the service life of the overall structure.

[0049] Further, a flat plate 84 is provided at the bottom of the lower side beam 42 of the carriage 41, and two first ear plates 85 are symmetrically arranged at the bottom of the flat plate 84. A first mounting hole is provided on the first ear plate 85. The flat plate 84 enhances the structural strength of the bottom of the lower side beam 42 of the carriage 41 and provides a stable mounting foundation for the first pivot 81. The two symmetrically arranged first ear plates 85 further disperse the force, avoiding the stress concentration problem caused by single-point force, improving the overall stability and load-bearing capacity of the locking structure. Especially when the movable side door 44 bears a large pressure, it can effectively prevent deformation or damage.

[0050] When the first pivot 81 is installed, the first pivot 81 passes through the two first mounting holes and is fixed by a split pin 87. This installation method is simple and reliable, facilitating on-site installation and disassembly. The use of the split pin 87 not only ensures the firm fixation of the first pivot 81 but also facilitates later maintenance and replacement, reducing the maintenance cost.

[0051] Two symmetrically arranged second ear plates 86 are provided on the main beam 46 of the semi-trailer body. A second mounting hole is provided on the second ear plate 86. The two symmetrically arranged second ear plates 86 provide a stable mounting foundation for the second pivot 82, disperse the force transmitted by the tie rod 6, and improve the overall stability of the locking structure. This design can effectively avoid deformation or damage caused by single-point force and ensure the reliability of the locking structure during long-term use.

[0052] When the second pivot 82 is installed, the second pivot 82 passes through the two second mounting holes and is fixed by a split pin 87. This installation method is simple and reliable, facilitating on-site installation and disassembly. The use of the split pin 87 not only ensures the firm fixation of the second pivot 82 but also facilitates later maintenance and replacement, reducing the maintenance cost.

[0053] Specifically, referring to Figure 7 and Figure 8 , the tie rod 6 includes a long rod body 62 and two short plates 63 symmetrically arranged at the front end of the long rod body 62. A third mounting hole is provided on the short plate 63. The third pivot 83 passes through the two third mounting holes and is fixed by a split pin 87. The two symmetrically arranged short plates 63 make the force on the third pivot 83 more uniform, avoiding the stress concentration problem caused by single-point force, thereby extending the service life of the tie rod 6 and the locking structure and reducing the failures caused by local wear or damage. Also, the symmetrically arranged short plates 63 can effectively absorb and disperse the vibration generated during vehicle driving, reducing the impact on the third pivot 83 and the tie rod 6, improving the anti-vibration performance of the locking structure, and ensuring stable operation under complex road conditions.

[0054] In this embodiment, referring to Figure 7 and Figure 8, the lock plate 7 includes a front half 71 in an L shape and a rear half 72 in an arc shape. With such a setting, the L-shaped front half 71 is designed to better fit the shape of the movable side compartment door 44, providing a larger contact area, thereby more effectively blocking the outward opening of the movable side compartment door 44, ensuring that the movable side compartment door 44 will not accidentally open during the unloading process, and improving safety and reliability. The design of the arc-shaped rear half 72 makes the rotation of the lock plate 7 smoother, reducing the possibility of friction and jamming, and improving the operation flexibility and response speed of the locking structure, especially performing more excellently during frequent operations.

[0055] Reinforcing ribs are also formed on the lock plate 7, enhancing the overall structural strength of the lock plate 7, enabling it to withstand greater pressure and impact, especially under high-load working conditions, effectively avoiding the risk of deformation or fracture of the lock plate 7.

[0056] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0057] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or can be indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A rollover dump semitrailer, comprising a semitrailer body, a car body that can be rolled over on the semitrailer body, and a driving mechanism for driving the car body to roll over, characterized in that: The upper side beam of the car body is provided with a plurality of movable side compartment doors pivotally connected thereto, and the lower side beam of the car body is provided with a side baffle structure and a locking door structure corresponding to the movable side compartment doors, the side baffle structure comprising a baffle, a counterweight beam arranged on the top of the outer side surface of the baffle, and a plurality of support pipes vertically arranged on the baffle, the bottom of the support pipe being pivotally connected to the lower side beam of the car body, when the car body is not in a rollover state, the movable side compartment door is closed with the lower side beam of the car body, the baffle is located on the outer side of the movable side compartment door and blocks the movable side compartment door and the baffle from opening outwards through the locking door structure; when the car body rolls over to unload, the locking door structure automatically unlocks and disengages from the baffle, and the movable side compartment door swings away from the lower side beam of the car body to form a unloading port, and the baffle flips downward and guides the material in the car body to flow out in a direction away from the vehicle tires.

2. The side-tip dump trailer according to claim 1, characterized in that: The baffle includes a first straight plate, an outer inclined plate, and a second straight plate connected in sequence from top to bottom. The support pipe is welded to the outer surface of the first straight plate and penetrates the outer inclined plate and the second straight plate to extend toward the lower side beam of the car body.

3. The side-tip dump trailer according to claim 1, characterized in that: A plurality of supporting ears having the same number as the supporting tubes and corresponding to each other are arranged on the lower side beam of the carriage, a rotating shaft is fixedly arranged on the supporting ears, and a shaft sleeve which is loosely mounted on the rotating shaft is arranged at the bottom of the supporting tube.

4. The side-tip dump trailer according to claim 3, characterized in that: The shaft sleeve is provided with an oil nozzle for lubricating the rotating shaft.

5. The side-trailer according to any one of claims 1 to 4, characterized in that: The support tubes are rectangular tubes and are provided in three pieces. The three support tubes are arranged on the baffle at intervals on the left and right sides.

6. The side-tip dump trailer according to claim 1, characterized in that: The door locking structure includes a pull rod, a lock plate, a first pivot arranged at the bottom of the lower side beam of the car body, and a second pivot arranged on the beam of the semi-trailer body, the second pivot is located behind the first pivot, the middle part of the lock plate is rotatably connected around the first pivot, the rear end of the pull rod is provided with a waist-shaped hole, the second pivot passes through the waist-shaped hole to form a connection with the pull rod, the rear end of the pull rod is provided with a third pivot and the rear end of the lock plate is rotatably connected around the third pivot, the front half of the lock plate is used to prevent the movable side door from opening outwards, and the bottom of the car body is also provided with a top pin for pressing down the pull rod to drive the front half of the lock plate to prevent the movable side door from opening outwards.

7. The side-tip dump trailer according to claim 6, characterized in that: The ejector pin comprises an upwardly arranged bolt and a cylinder transversely welded to the bottom of the bolt, and a nut threadably connected to the bolt is fixedly arranged on the carriage.

8. The side-tip dump semitrailer according to claim 6, characterized in that: A flat plate and two first ear plates symmetrically arranged at the bottom of the flat plate are provided at the bottom of the lower side beam of the carriage. A first mounting hole is opened on the first ear plate. The first pivot passes through the two first mounting holes and is fixed by a cotter pin.

9. The side-tip dump trailer according to claim 6, characterized in that: Two symmetrically arranged second ear plates are arranged on the beam of the semitrailer body, and second mounting holes are opened on the second ear plates. The second pivot passes through the two second mounting holes and is fixed by a cotter pin.

10. The side-tip dump semitrailer according to claim 6, characterized in that: The pull rod comprises a long rod body and two short plates symmetrically arranged on the front end of the long rod body, a third mounting hole is opened on the short plate, and the third pivot passes through the two third mounting holes and is fixed by a cotter pin.

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