Side carriage door locking structure of rollover self-dumping semitrailer

Abstract

The utility model relates to the technical field of rollover self-dumping semitrailers, and discloses a side compartment door locking structure of a rollover self-dumping semitrailer, which comprises a pull rod, a lock plate, a first pivot and a second pivot, the middle of the lock plate is rotatably connected around the first pivot, the rear end of the pull rod is provided with a long hole, the second pivot penetrates through the long hole to be connected with the pull rod, and the lock plate is fixedly connected with the pull rod. A third pivot is arranged at the rear end of the pull rod, the rear end of the lock plate is rotationally connected around the third pivot, the front half portion of the lock plate is used for preventing the side compartment door from being opened outwards, and a lifting pin used for pressing the pull rod downwards to drive the front half portion of the lock plate to prevent the side compartment door from being opened outwards is further arranged at the bottom of the compartment. The side compartment door locking structure of the rollover self-dumping semitrailer is simple in structure, light in dead weight and long in service life, reduces maintenance cost, ingeniously utilizes rollover power of a compartment, synchronously drives the locking plate to swing to lock or break away from the side compartment door, does not need manual operation, greatly improves reliability and stability of side compartment door locking, and improves safety of the side compartment door. And the safety of the whole transportation process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of side tipping self-unloading semitrailer, especially relates to a side tipping self-unloading semitrailer's side compartment door locking structure. BACKGROUND

[0002] In the field of modern logistics transportation, the side tipping self-unloading semitrailer plays a crucial role, especially in the transportation of loose goods, which has a significant advantage. In the transportation process of loose goods such as sand, soil, and coal, the side tipping self-unloading semitrailer can automatically tilt the carriage to a certain angle during unloading, allowing the goods to flow out of the side compartment door under the action of gravity to achieve unloading, thereby greatly improving the transportation efficiency and shortening the transportation cycle, and the market coverage is relatively high, providing a strong guarantee for the efficient operation of related industries.

[0003] At present, the side compartment door locking structure of the self-unloading vehicle on the market generally adopts a chain tensioning self-locking hook structure. Although this structure can meet the basic use requirements to some extent, with the development of the industry and the improvement of use requirements, it also gradually shows its shortcomings: 1. The structure is heavy, which not only increases the overall weight of the vehicle, reduces the effective load of transportation, but also increases energy consumption. 2. The service life of the chain is relatively low, and frequent loading and unloading operations can easily cause the chain to wear, stretch, or even break, which requires frequent replacement of the chain, greatly increasing maintenance costs, affecting the normal use efficiency of the vehicle, and increasing the time and economic cost of logistics transportation. 3. Manual triggering of the chain tensioning is prone to forgetting to tighten the operation.

[0004] Therefore, the prior art needs to be improved and improved. UTILITY MODEL CONTENTS

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a side tipping self-unloading semitrailer's side compartment door locking structure, which aims to replace the existing chain locking method and better meet the actual use requirements.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A side tipping self-unloading semitrailer's side compartment door locking structure, comprising 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 vehicle girder, 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 an oblong hole, the second pivot passes through the oblong hole and is connected 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 block the outward opening of the side compartment door, and the bottom of the carriage is further provided with a top pin for pressing down the pull rod to drive the front half of the lock plate to block the outward opening of the side compartment door.

[0008] As a further improvement of the above technical solution, the top pin comprises a bolt arranged upwardly, and a cylinder transversely welded at the bottom of the bolt, and the carriage is fixedly provided with a nut threadedly connected with the bolt.

[0009] As a further improvement of the above technical solution, the bottom of the lower side beam of the carriage is provided with a flat plate, and two first ear plates are symmetrically arranged at the bottom of the flat plate, and first installation holes are formed in the first ear plates, and the first pivot is fixed through the two first installation holes by means of a split pin.

[0010] As a further improvement of the above technical solution, the vehicle girder is provided with two symmetrically arranged second ear plates, second installation holes are formed in the second ear plates, and the second pivot is fixed through the two second installation holes by means of a split pin.

[0011] As a further improvement of the above technical solution, the pull rod comprises a long rod body and two short plates symmetrically arranged at the front end of the long rod body, third installation holes are formed in the short plates, and the third pivot is fixed through the two third installation holes by means of a split pin.

[0012] As a further improvement of the above technical solution, the lock plate comprises an L-shaped front half and an arc-shaped rear half.

[0013] The side compartment door locking structure of the side tipping self-unloading semitrailer has the advantages that the side compartment door locking structure is simple in structure, light in self-weight, long in service life, low in maintenance cost, and capable of automatically realizing the locking and unlocking of the side compartment door by means of the side tipping power of the carriage, greatly improving the reliability and stability of the side compartment door locking, ensuring the safety of the whole transportation process, and further improving the unloading efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a perspective view of the side compartment door locking structure of the utility model.

[0015] Figure 2 FIG. 2 is a front view of the side compartment door locking structure of the utility model.

[0016] Figure 3 FIG. 3 is a schematic view of the side compartment door locking structure when the carriage is placed horizontally.

[0017] Figure 4 FIG. 4 is a schematic view of the side compartment door locking structure when the carriage is inclined by 15°.

[0018] Figure 5 FIG. 5 is a schematic view of the side compartment door locking structure when the carriage is inclined by 45°.

[0019] Figure 6The side door locking structure is used for locking the side door.

[0020] Main element symbol explanation: 1-pull rod, 11-elongated hole, 12-long rod body, 13-short plate, 2-lock plate, 21-front half, 22-rear half, 31-first pivot, 32-second pivot, 33-third pivot, 4-top pin, 41-bolt, 42-cylinder, 43-nut, 51-flat plate, 52-first ear plate, 61-second ear plate, 62- cotter pin, 7-carriage, 71-lower side beam, 72-side door, 8-vehicle beam. DETAILED DESCRIPTION

[0021] The side door locking structure of the side tipping self-unloading semi-trailer is provided, in order to make the purpose, technical scheme and effect of the utility model more clear and explicit, the utility model is further explained in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the protection scope of the utility model.

[0022] Please refer to Figures 1 to 6 The utility model provides a kind of side door 72 locking structure of the side tipping self-unloading semi-trailer, including pull rod 1, lock plate 2, first pivot 31 being arranged at the bottom of lower side beam 71 of carriage 7, and second pivot 32 being arranged on vehicle beam 8, second pivot 32 is located behind first pivot 31, the middle part of lock plate 2 is rotatably connected around first pivot 31, the rear end portion of pull rod 1 is provided with elongated hole 11, second pivot 32 passes through elongated hole 11 and is connected with pull rod 1, the rear end portion of pull rod 1 is provided with third pivot 33 and the rear end portion of lock plate 2 is rotatably connected around third pivot 33, the front half 21 of lock plate 2 is used to block side door 72 to open outward, the bottom of carriage 7 is also provided with top pin 4 for pressing down pull rod 1 to drive the front half 21 of lock plate 2 to block side door 72 to open outward.

[0023] In loading and transportation phase, carriage 7 is in flat state, top pin 4 exerts pressure downward to pull rod 1, so that pull rod 1 generates downward swing movement trend with second pivot 32 being connected with vehicle beam 8 as fulcrum, not only make lock plate 2 rotate around first pivot 31, lock plate 2 front half 21 rotates to the position of blocking side door 72, or presses on side door 72, side door 72 cannot open outward to realize the locking of side door 72, guarantee the safety of goods in transportation.

[0024] When entering the unloading link, the carriage 7 begins to gradually roll over, the inclination angle continues to increase, and the top pin 4 moves away from the pull rod 1. During this process, the first pivot 31 swings backward with the rolling over of the carriage 7, the pull rod 1 retreats synchronously under the drive of the lock plate 2 and the third pivot 33, the second pivot 32 slides in the elongated hole 11, the lock plate 2 also reversely rotates around the first pivot 31, and then the front half 21 of the lock plate 2 leaves the position of blocking the side door 72, at this time, the side door 72 can swing around the pivot connection point with the upper side beam of the carriage 7 to be smoothly opened, and the goods automatically flow out from the side door 72 by gravity to complete unloading.

[0025] After unloading, the carriage 7 is reset, and the side door 72 and the lock plate 2 are also automatically reset and closed, the lock plate 2 restricts the opening of the side door 72 again, so that the vehicle can directly drive away, improving the work efficiency.

[0026] The side door 72 locking structure of the side roll self-unloading semitrailer provided by the utility model has the advantages of simple structure, light self-weight, long service life, reduced maintenance cost, ingenious use of the rolling over power of the carriage 7 to synchronously drive the lock plate 2 to swing and lock or separate from the side door 72, no manual operation, greatly improved reliability and stability of the side door 72 locking, ensured safety during the whole transportation, automatically realized unlocking of the side door 72, more smooth and efficient operation, and further improved unloading efficiency.

[0027] Specifically, referring to Figure 1 , the top pin 4 comprises a bolt 41 arranged upward, a cylinder 42 transversely welded at the bottom of the bolt 41, and the carriage 7 is fixedly provided with a nut 43 threadedly connected with the bolt 41. The top pin 4 adopts the threaded connection design of the bolt 41 and the nut 43, and the extension height of the cylinder 42 can be accurately adjusted by rotating the bolt 41. This adjustment function can adapt to the required locking force under different goods weights or compensate for the slight deformation of the side door 72 due to long-term use, so as to ensure the locking reliability. In addition, compared with the traditional single-point contact structure, the cylinder 42 bottom surface and the pull rod 1 top surface form a first contact, the contact area is larger, the downward pressure of the top pin 4 can be uniformly transmitted to the pull rod 1, the local stress concentration leading to component fatigue damage is avoided, and the overall structure service life is prolonged.

[0028] Further, referring to Figure 1 and Figure 2 , the bottom of the lower side beam 71 of the carriage 7 is provided with a flat plate 51, two first ear plates 52 symmetrically arranged at the bottom of the flat plate 51, and a first mounting hole is formed in the first ear plate 52. The arrangement of the flat plate 51 enhances the structural strength of the bottom of the lower side beam 71 of the carriage 7 and provides a stable installation basis for the first pivot 31. The two symmetrically arranged first ear plates 52 further disperse the stress, avoid the stress concentration problem caused by single-point stress, improve the overall stability and carrying capacity of the locking structure, and especially when the side door 72 bears a larger pressure, the deformation or damage can be effectively prevented.

[0029] When the first pivot 31 is installed, the first pivot 31 passes through the two first mounting holes and is fixed by the split pin 62. This installation method is simple and reliable, facilitating on-site installation and disassembly. The use of the split pin 62 not only ensures the firmness of the first pivot 31, but also facilitates later maintenance and replacement, reducing maintenance costs.

[0030] The vehicle girder 8 is provided with two symmetrically arranged second ear plates 61, and the second ear plates 61 are provided with second mounting holes. The two symmetrically arranged second ear plates 61 provide a stable installation basis for the second pivot 32, dispersing the stress transmitted by the pull rod 1 and improving the overall stability of the locking structure. This design can effectively avoid deformation or damage caused by single-point stress, ensuring the reliability of the locking structure in long-term use.

[0031] When the second pivot 32 is installed, the second pivot 32 passes through the two second mounting holes and is fixed by the split pin 62. This installation method is simple and reliable, facilitating on-site installation and disassembly. The use of the split pin 62 not only ensures the firmness of the second pivot 32, but also facilitates later maintenance and replacement, reducing maintenance costs.

[0032] Specifically, referring to Figure 1 and Figure 2 , the pull rod 1 includes a long rod body 12 and two symmetrically arranged short plates 13 on the front end of the long rod body 12, and the long rod body 12 and the short plates 13 are connected by welding. The short plates 13 are provided with third mounting holes, and the third pivot 33 passes through the two third mounting holes and is fixed by the split pin 62. The two symmetrically arranged short plates 13 make the stress of the third pivot 33 more uniform, avoiding the problem of stress concentration caused by single-point stress, thereby prolonging the service life of the pull rod 1 and the locking structure and reducing failures caused by local wear or damage. The symmetrically arranged short plates 13 can effectively absorb and disperse the vibrations generated during vehicle driving, reducing the impact on the third pivot 33 and the pull rod 1, improving the anti-vibration performance of the locking structure, and ensuring stable operation in complex road conditions.

[0033] In this embodiment, referring to Figure 1 and Figure 2 , the lock plate 2 includes an L-shaped front half 21 and an arc-shaped rear half 22. By such arrangement, the L-shaped front half 21 design can better fit the shape of the side door 72, providing a larger contact area, thereby more effectively blocking the side door 72 from opening outward, ensuring that the side door 72 will not accidentally open during unloading, improving safety and reliability. The arc-shaped rear half 22 design makes the lock plate 2 rotate more smoothly, reducing the possibility of friction and jamming, improving the operation flexibility and response speed of the locking structure, especially in frequent operation.

[0034] The reinforcing ribs are further formed on the lock plate 2, which enhances the overall structural strength of the lock plate 2, so that the lock plate 2 can bear greater pressure and impact, especially in high-load working conditions, effectively avoiding the risk of deformation or fracture of the lock plate 2.

[0035] The long hole 11 refers to a non-circular hole, which can be a rectangular hole, a waist-shaped hole, a rounded rectangular hole, etc.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

[0037] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] It can be understood that for those skilled in the art, the technical scheme of the present application and the utility model concept can be replaced or changed equivalently, and all these changes or replacements shall belong to the protection scope of the present application.

Claims

1. A side compartment door locking structure of a rollover dump semi-trailer, characterized in that, The device comprises a pull rod, a lock plate, a first pivot arranged at the bottom of the lower side beam of the compartment, and a second pivot arranged on the vehicle beam, the second pivot being located behind the first pivot, the middle part of the lock plate being rotatably connected around the first pivot, the rear end of the pull rod being provided with an elongated hole, the second pivot being connected with the pull rod through the elongated hole, the rear end of the pull rod being provided with a third pivot and the rear end of the lock plate being rotatably connected around the third pivot, the front half of the lock plate being used to block the outward opening of the side compartment door, and the bottom of the compartment is further provided with a top pin used to press down the pull rod to drive the front half of the lock plate to block the outward opening of the side compartment door.

2. The side tipping dumper semi-trailer side access door locking structure according to claim 1, characterised in that, The top pin comprises an upwardly arranged bolt and a cylinder transversely welded at the bottom of the bolt, and the compartment is fixedly provided with a nut threadedly connected with the bolt.

3. The side tipping dumper of claim 1, wherein, The bottom of the lower side beam of the compartment is provided with a flat plate and two symmetrically arranged first ear plates at the bottom of the flat plate, the first ear plates are provided with first mounting holes, and the first pivot is fixed through the two first mounting holes by means of a cotter pin.

4. The side wall locking structure of the roll-over dump semi-trailer according to claim 1, characterized in that, The vehicle beam is provided with two symmetrically arranged second ear plates, the second ear plates are provided with second mounting holes, and the second pivot is fixed through the two second mounting holes by means of a cotter pin.

5. The side dump tipper of claim 1, wherein, The pull rod comprises a long rod body and two symmetrically arranged short plates at the front end of the long rod body, the short plates are provided with third mounting holes, and the third pivot is fixed through the two third mounting holes by means of a cotter pin.

6. The side wall locking structure of the roll-over dump semi-trailer according to any one of claims 1-5, characterized in that, The lock plate comprises an L-shaped front half and an arc-shaped rear half.

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