A semi-trailer carriage facilitating loading and unloading of materials

Abstract

The application provides a semi-trailer compartment facilitating material loading and unloading, and belongs to the technical field of semi-trailer compartments. The semi-trailer compartment comprises a compartment body, a supporting assembly and a counterweight assembly. The supporting assembly comprises a limiting piece, a backing plate and a jacking assembly. The backing plate is hinged to the compartment body through a hinge shaft on the side close to the discharge compartment plate. The backing plate divides the inner cavity of the compartment body into a lower chamber and an upper chamber, and is located above the fixed section. The counterweight assembly is arranged in the lower chamber. The counterweight assembly comprises a traction piece and a counterweight piece. The counterweight piece has a degree of freedom towards the side close to the fixed compartment plate. The traction piece is connected to the backing plate and the counterweight piece. The semi-trailer compartment provided by the application increases the counterweight assembly to balance the gravity on the side of the fixed compartment plate during discharging, adjust the gravity center and avoid vehicle rollover caused by the gravity center deviation of the vehicle during unloading. Meanwhile, the counterweight piece is located in the middle of the lower chamber in the initial position, which reduces the overall center height of the compartment and improves the stability of the conveying.

Description

Technical Field

[0001] This invention belongs to the field of semi-trailer box technology, and more specifically, relates to a semi-trailer box that facilitates the loading and unloading of materials. Background Technology

[0002] Dump semi-trailers are divided into rear-tipping dump semi-trailers and side-tipping dump semi-trailers. Compared with rear-tipping dump semi-trailers, side-tipping dump semi-trailers have the advantages of faster unloading speed, higher efficiency, wider transportation range and lower cost. However, existing side-tipping semi-trailers mainly achieve unloading by tipping the cargo box to the side, which causes the vehicle's center of gravity to shift during the tipping. The greater the tipping angle of the cargo box, the greater the shift in the vehicle's center of gravity. Especially when unloading is fast, the sudden shift in the vehicle's center of gravity often leads to the entire vehicle tipping over, thus reducing the unloading safety of existing side-tipping semi-trailers. Summary of the Invention

[0003] The purpose of this invention is to provide a semi-trailer cargo box that facilitates loading and unloading of materials, aiming to solve the problem of vehicle rollover caused by the shifting of the vehicle's center of gravity during unloading of side-dump semi-trailers.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a semi-trailer cargo box that facilitates material loading and unloading, comprising:

[0005] The container body has an unloading panel and a fixed panel on each side. The unloading panel includes a fixed section and a movable section. The movable section is hinged to the upper end of the fixed section and flips outward toward the outside of the container body.

[0006] A support assembly is disposed within the compartment and includes a limiting member, a pad, and a lifting assembly. The limiting member is located inside the fixed compartment panel. The pad is hinged to the compartment via a hinge shaft on the side near the unloading compartment panel, and the side of the pad away from the unloading compartment panel overlaps the limiting member. The pad divides the interior of the compartment into a lower chamber and an upper chamber, and the pad is located above the fixed section. The lifting assembly is disposed within the lower chamber, and its upper end is hinged to the lower end of the pad.

[0007] A counterweight assembly is disposed in the lower cavity. The counterweight assembly includes a traction member and a counterweight member. The counterweight member has a degree of freedom toward the side closer to the fixed panel. The traction member connects the pad and the counterweight member. The rotation of the pad drives the traction member to push the counterweight member toward the side closer to the fixed panel.

[0008] In another embodiment of this application, the pad is provided with an extension groove on the side of the fixed panel that faces the fixed panel. An extension plate is provided in the extension groove and the extension plate is movable along the depth direction of the extension groove. An elastic member is provided between the extension plate and the bottom of the extension groove. The elastic member drives the free end of the extension plate to extend out of the extension groove and abut against the fixed panel.

[0009] In another embodiment of this application, the upper end of the pad is further provided with a baffle, which is hinged to the pad; the lower end of the baffle is connected to a flexible rope, and the end of the flexible rope is connected to the rear end of the extension plate.

[0010] In another embodiment of this application, the bottom of the extension groove is connected to a connecting hole arranged along the width direction of the pad, and a connecting rod is slidably arranged in the connecting hole; the front end of the connecting rod is connected to the tail end of the extension plate, and the connecting rod is also provided with a connecting part for connecting the flexible rope.

[0011] In another embodiment of this application, a blocking block is provided on one side of the baffle, the blocking block is slidably disposed on the upper end of the pad, and the blocking block includes an inclined surface, the upper end of the inclined surface is attached to the side wall of the baffle; a reset member is provided at the lower end of the blocking block, and the reset member has a longitudinal degree of freedom.

[0012] As another embodiment of this application, the traction component includes:

[0013] A longitudinal track is longitudinally located on the side of the bottom plate of the compartment near the unloading compartment plate;

[0014] The counterweight support includes a hinge portion hinged to the center of the base plate and traction and load-bearing portions located on both sides of the hinge portion, with an obtuse angle between the traction and load-bearing portions. The load-bearing portions are located on the side of the hinge portion away from the unloading chamber plate, and the thickness of the load-bearing portions gradually decreases from one end of the hinge portion to its other end. The traction portion includes an arc-shaped rod and a slider, with the middle of the arc-shaped rod protruding upwards, and the end of the arc-shaped rod away from the hinge portion connected to the slider. The slider is adapted to the longitudinal track. The counterweight is slidably mounted on the counterweight support along its length.

[0015] A traction rope connects the lower end of the pad and the slider; the traction rope drives the slider and the traction part to move upward until the load-bearing part is in contact with the bottom plate, and the counterweight moves towards one side of the fixed panel under the action of gravity.

[0016] In another embodiment of this application, the counterweight is a horizontally arranged cylinder; the counterweight is rotatably disposed on the upper end of the counterweight support.

[0017] As another embodiment of this application, the traction component includes:

[0018] A bottom slide rail is provided on the side of the lower chamber near the fixed panel, and the length direction of the bottom slide rail is consistent with the width direction of the chamber; the lower end of the counterweight is slidably engaged with the bottom slide rail; the height of the upper end surface of the bottom slide rail gradually decreases from the side near the fixed panel to the other side.

[0019] A threaded rod is provided above the bottom slide rail and is parallel to the upper end face of the bottom slide rail; the threaded rod passes through the counterweight and is threadedly engaged with the rotating bearing inside the counterweight.

[0020] A drive rope connects the lower end of the pad and the counterweight; the drive rope is elastic.

[0021] In another embodiment of this application, the support component further includes a buffer structure, the buffer structure comprising:

[0022] A drive gear is located on one side of the hinge shaft, and the drive gear rotates synchronously with the hinge shaft;

[0023] A one-way damping gear is disposed in the lower cavity, and the one-way damping gear meshes with the drive gear.

[0024] In another embodiment of this application, the lifting assembly includes:

[0025] The mounting base includes a top column, a support plate, and multiple elastic supports. The top column is mounted on the bottom plate of the compartment, and the upper end of the top column is hinged to the support plate. The rotation direction of the support plate is perpendicular to the length direction of the compartment. The multiple elastic supports are respectively located in pairs on both sides of the top column, and the upper end of the elastic support is connected to the lower end of the support plate. The elastic support has a longitudinal degree of freedom.

[0026] A telescopic component is located at the upper end of the support plate, and the upper end of the telescopic component is hinged to the lower end of the pad plate.

[0027] The beneficial effects of the semi-trailer body for easy loading and unloading of materials provided by the present invention are as follows: Compared with the prior art, the semi-trailer body for easy loading and unloading of materials of the present invention is divided into a lower chamber and an upper chamber by setting a pad. The lower chamber is used to install a lifting component and a counterweight component. The addition of the counterweight component is used to balance and fix the gravity on one side of the body panel and adjust the center of gravity during unloading, so as to avoid the vehicle from overturning due to the tilt of the vehicle's center of gravity during unloading. At the same time, the counterweight component is located in the middle of the lower chamber in the initial position, which reduces the overall center height of the body and improves the stability of transportation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a semi-trailer cargo box that facilitates material loading and unloading, provided in the first embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram showing the positional relationship between the lifting assembly and the counterweight assembly provided in the first embodiment of the present invention;

[0031] Figure 3 A top view of the upper chamber of a semi-trailer compartment for easy loading and unloading of materials, provided in the first embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a semi-trailer cargo box that facilitates material loading and unloading, provided for the second embodiment of the present invention.

[0033] In the diagram: 1. Fixed panel; 2. Limiting component; 3. Bottom plate; 4. Fixed section; 5. Moving section; 6. Pad; 7. Baffle; 8. Extension plate; 9. Telescopic component; 10. Support plate; 11. Top column; 12. Elastic component; 13. Connecting rod; 14. Counterweight; 15. Traction unit; 16. Load-bearing unit; 17. Sliding block; 18. Longitudinal track; 19. Traction rope; 20. Block; 21. Adaptor groove; 22. Bottom slide rail; 23. Threaded rod; 24. Rotating bearing component; 25. Drive rope; 26. First auxiliary gear; 27. Second auxiliary gear; 28. One-way damping gear. Detailed Implementation

[0034] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0035] Please see Figures 1 to 4The present invention provides a semi-trailer body for easy loading and unloading of materials. The semi-trailer body includes a body, a support assembly, and a counterweight assembly. The two sides of the body are a discharge panel and a fixed panel 1, respectively. The discharge panel includes a fixed section 4 and a movable section 5. The movable section 5 is hinged to the upper end of the fixed section 4 and flips outwards towards the outside of the body. The support assembly is located inside the body and includes a limiting member 2, a pad 6, and a lifting assembly. The limiting member 2 is located inside the fixed panel 1. The pad 6 is hinged to the body on the side near the discharge panel via a hinge shaft, and the pad 6 is away from the discharge panel. One side of the side panel overlaps with the limiting member 2; the pad 6 divides the inner cavity of the body into a lower chamber and an upper chamber, and the pad 6 is located above the fixed section 4; the lifting assembly is located in the lower chamber and its upper end is hinged to the lower end of the pad 6; the counterweight assembly is located in the lower chamber, and the counterweight assembly includes a traction member and a counterweight 14, the counterweight 14 having a degree of freedom toward the side closer to the fixed side panel 1; and the traction member connects the pad 6 and the counterweight 14; the rotation of the pad 6 drives the traction member to push the counterweight 14 toward the side closer to the fixed side panel 1.

[0036] The cargo box is located above the axle of the semi-trailer, and is equipped with panels around its perimeter. The front and rear panels are end panels, while the left and right panels are a discharge panel and a fixed panel 1, respectively. The two ends of the fixed panel 1 are connected to the two end panels. The discharge panel can be hinged and flipped outwards for unloading. Specifically, the discharge panel includes a fixed section 4 and a movable section 5, with the height of the fixed section 4 being less than the height of the movable section 5. The fixed section 4 is fixedly connected to the two end panels or detachably connected using bolts or other means. The movable section 5 is hinged to the upper end of the fixed section 4. The movable section 5 flips outwards around its hinge axis with the fixed section 4 until its outer wall is against the outer wall of the fixed section 4, thus allowing unloading from the opening of the movable section 5.

[0037] The pad 6 is located inside the cavity of the compartment, and in its initial position, the four edges of the pad 6 are attached to the four side walls of the compartment. The side of the pad 6 closest to the unloading compartment plate is hinged to the two end panels of the compartment, while the side of the pad 6 closest to the fixed compartment plate 1 overlaps the limiting member 2, and this state is defined as the initial position. The other two edges of the pad 6 are attached to the inner side walls of the two end panels. The hinge axis between the pad 6 and the end panels is located above the fixed section 4 of the unloading compartment plate. Therefore, when the pad 6 is in a horizontal state, the upper surface of the pad 6 is higher than the upper surface of the fixed section 4 of the unloading compartment plate.

[0038] The pad 6 divides the interior of the compartment into a lower chamber and an upper chamber. The upper chamber is used for loading goods, while the lower chamber houses the lifting assembly that drives the pad 6 to rotate and the counterweight assembly that counteracts the tilting of the center of gravity during unloading. The lifting assembly is located on the side of the pad 6 closest to the fixed compartment 1 and extends and retracts along its length to drive the pad 6 to rise or fall towards the side closest to the fixed compartment 1. The counterweight assembly includes a counterweight 14 and a traction component. When the pad 6 is in its initial position, it is horizontal, and the counterweight 14, without external force, is located in the middle of the compartment, its weight evenly distributed on the bottom plate 3. When the pad 6 flips upward, the traction component connected to the pad 6 drives the counterweight 14 to move towards the side of the fixed compartment 1 to increase the gravity on that side. When goods are tipped over, the center of gravity of the truck bed shifts towards the unloading side. Moving the counterweight 14 towards the fixed side of the truck bed 1 increases the weight on that side, mitigating the risk of the vehicle overturning due to excessive center of gravity shift. Furthermore, the counterweight 14 also lowers the overall center of gravity of the truck bed, improving its stability during transport.

[0039] The present invention provides a semi-trailer body that facilitates material loading and unloading. Compared with the prior art, a pad plate 6 is set to divide the body into a lower chamber and an upper chamber. The lower chamber is used to install a lifting component and a counterweight component. The added counterweight component is used to balance the weight on one side of the body panel 1 and adjust the center of gravity during unloading, so as to avoid the vehicle from overturning due to the vehicle's center of gravity tilting during unloading. At the same time, the counterweight 14 is located in the middle of the lower chamber in the initial position, which reduces the overall center height of the body and improves the stability of transportation.

[0040] Optionally, the counterweight 14 is made of heavy metal material; the traction component connected to the counterweight 14 is a telescopic component 9, such as a cylinder. During unloading, the telescopic component 9 extends, causing the counterweight 14 to move towards one side of the fixed compartment 1; after unloading, the telescopic component 9 retracts, causing the counterweight 14 to return to the middle of the compartment. Alternatively, there can be two counterweights 14, located on opposite sides of the compartment. During unloading, the traction component on one side of the unloading compartment drives its connected counterweight 14 to move to one side of the fixed compartment 1; after unloading, it returns to its original position.

[0041] Optionally, the limiting member 2 includes an upper limiting member 2 and a lower limiting member 2 disposed on the fixed panel 1, wherein the lower limiting member 2 is used to receive the end of the pad 6 away from the hinge axis; the upper limiting member 2 is used to limit the rotation angle of the pad 6.

[0042] In some possible embodiments, please refer to Figure 1 and Figure 3The pad 6 has an extension groove with a slot facing the fixed panel 1 on the side near the fixed panel 1. An extension plate 8 is provided in the extension groove and the extension plate 8 is moved along the depth direction of the extension groove. An elastic element 12 is provided between the extension plate 8 and the bottom of the extension groove. The elastic element 12 drives the free end of the extension plate 8 to extend out of the extension groove and abut against the fixed panel 1.

[0043] Silicone pads are provided at both ends of the pad 6 along its length, and the silicone pads are in contact with the inner sidewall of the end panel.

[0044] The depth direction of the extension groove is consistent with the width direction of the pad 6, and the length direction of the extension groove is consistent with the length direction of the pad 6. Both ends of the extension groove extend to the ends of the pad 6. The extension groove includes a narrow section and a wide section, wherein the narrow section is connected to the wide section and the opening of the extension groove is connected to the groove opening; the bottom of the groove is located at the wide section. The connection between the narrow section and the wide section forms a limiting surface.

[0045] The extension plate 8 includes a plate body and a limiting protrusion. The plate body extends from the opening of the extension groove through a narrow section. The limiting protrusion is located at the rear end of the plate body and slides within the wide section of the extension groove. An elastic element 12 is provided between the rear end of the limiting protrusion and the bottom of the extension groove. The elastic element 12 is always in a compressed state. When the extension plate 8 is not subjected to external force, the elastic element 12 drives the limiting protrusion to abut against the limiting surface at the front end of the wide section, at which point the plate body extends from the opening of the extension groove. The elastic element 12 is a spring.

[0046] Optionally, an extension post extending towards the bottom of the groove is provided at the tail end of the extension plate 8; a spring is sleeved on the outside of the extension post, and the length of the spring when it is in a compressed state is equal to the length of the extension post.

[0047] The upper end of the pad 6 is also provided with a baffle 7, which is hinged to the pad 6; the lower end of the baffle 7 is connected to a flexible rope, and the end of the flexible rope is connected to the free end of the extension plate 8.

[0048] To reduce the tilting speed of the center of gravity of the container during unloading, a baffle 7 is provided at the upper end of the pad 6. The baffle 7 is hinged to the pad 6 and can be flipped toward one side of the unloading box until the baffle 7 is attached to the pad 6. The upper end surface of the pad 6 is provided with an adapter groove 21 for attaching the baffle 7.

[0049] A flexible rope is connected to the lower end of the baffle 7. Under the traction of the flexible rope, the baffle 7 rotates around its hinge point with the pad 6. The end of the flexible rope is connected to the rear end of the extension plate 8. When the pad 6 flips upward, under the action of the elastic element 12, the extension plate 8 moves toward the opening of the extension groove. The extension plate 8 drives the flexible rope to move, causing the flexible rope to drive the baffle 7 to rotate.

[0050] Specifically, the bottom of the extension groove is connected to a connecting hole arranged along the width direction of the pad 6, and a connecting rod 13 is slidably arranged in the connecting hole; the front end of the connecting rod 13 is connected to the tail end of the extension plate 8, and the connecting rod 13 is also provided with a connecting part for connecting a flexible rope.

[0051] The connecting hole communicates with the bottom of the extension groove, and the length direction of the connecting hole is consistent with the depth direction of the extension groove. A connecting rod 13 is movably installed inside the connecting hole, and the front end of the connecting rod 13 passes through the bottom of the extension groove and connects to the tail end of the extension plate 8. The end of the flexible rope is connected to the connecting rod 13. The flexible rope can be an elastic rope, which can offset part of the displacement difference through its own elasticity, thereby improving the traction effect of the flexible rope.

[0052] In some possible embodiments, please refer to Figure 1 and Figure 3 A blocking block 20 is provided on one side of the baffle 7. The blocking block 20 is slidably disposed on the upper end of the pad 6 in the longitudinal direction. The blocking block 20 includes an inclined surface, and the upper end of the inclined surface is attached to the side wall of the baffle 7. A reset member is provided at the lower end of the blocking block 20. The reset member has a longitudinal degree of freedom.

[0053] The shielding block 20 is located on the side of the baffle 7 near the unloading chamber plate. The upper end of the shielding block 20 is an inclined surface, and the upper end of the inclined surface is attached to the side wall of the baffle 7 to prevent material from falling into the gap between the baffle 7 and the adapter groove 21. A shielding groove with the opening facing upward is provided on one side of the baffle 7, and the shielding block 20 is slidably disposed in the shielding groove.

[0054] Optionally, the upper part of the blocking block 20 is a right-angled triangle, with one right-angled side of the triangle abutting the side wall of the baffle 7. A spring is connected to the lower end of the blocking block 20, and the lower end of the spring abuts against the bottom of the blocking groove. When the blocking block 20 is subjected to external pressure, the blocking block 20 moves downward and sinks into the blocking groove while compressing the spring; when the external pressure is removed, the blocking block 20 moves upward under the action of the spring.

[0055] Optionally, a torsion spring is installed at the hinge joint between the baffle 7 and the pad 6. When the external force is removed from the flexible rope, the baffle 7 returns to a state perpendicular to the pad 6 under the action of the torsion spring.

[0056] Optionally, at least two baffles 7 are provided along the width direction of the compartment, and the two baffles 7 are spaced apart, with the distance between two adjacent baffles 7 being greater than the length of the baffle 7. When multiple baffles 7 are provided, the height of the baffles 7 gradually increases along the width direction of the compartment from one side of the unloading compartment plate toward the side of the fixed compartment plate 1.

[0057] The flexible ropes corresponding to multiple baffles 7 located on the same plane can be connected to the same connecting rod 13.

[0058] Multiple baffles 7 can be provided along the length of the body, with the multiple baffles 7 spaced apart. Correspondingly, multiple extension grooves and connecting holes are provided in the pad plate 6, and the multiple baffles 7 correspond one-to-one with the multiple extension grooves and multiple connecting holes.

[0059] When unloading begins, the pad 6 tilts upwards. During this tilting process, the extension plate 8 extends forward under the action of the elastic element 12, maintaining its position against the fixed box plate 1. As the pad 6 moves upwards, the cargo tilts out towards one side of the unloading box plate. During this tilting process, the cargo is blocked by the baffle 7, limiting the unloading speed and reducing the degree of tilt. As the pad 6 continues to tilt, the cargo below it is continuously unloaded, and the baffle 7, under the traction of the flexible rope, also continuously rotates, ensuring clean unloading while slowing down the unloading speed and reducing the degree of tilt.

[0060] In the first embodiment, please refer to Figure 1 The traction component includes a longitudinal track 18, a counterweight support, and a traction rope 19. The longitudinal track 18 is longitudinally located on the side of the bottom plate 3 of the compartment near the unloading compartment plate. The counterweight support includes a hinge portion hinged to the middle of the bottom plate 3 of the compartment and a traction portion 15 and a load-bearing portion 16 located on both sides of the hinge portion. The included angle between the traction portion 15 and the load-bearing portion 16 is an obtuse angle. The load-bearing portion 16 is located on the side of the hinge portion away from the unloading compartment plate, and the thickness of the load-bearing portion 16 gradually decreases from one end of the hinge portion to its end. The traction unit 15 includes an arc-shaped rod and a slider 17. The middle part of the arc-shaped rod protrudes upward, and the end of the arc-shaped rod away from the hinge is connected to the slider 17. The slider 17 is slidably engaged with the longitudinal track 18. The counterweight 14 is slidably mounted on the counterweight support. The traction rope 19 connects the lower end of the pad 6 and the slider 17. The traction rope 19 drives the slider 17 and the traction unit 15 to move upward until the load-bearing part 16 is in contact with the bottom plate 3, and the counterweight 14 moves toward the side of the fixed box plate 1 under the action of gravity.

[0061] The longitudinal track 18 is longitudinally located within the lower chamber, and is situated on the side closest to the unloading chamber plate. The slider 17 at the end of the counterweight support slides up and down along the longitudinal track 18 under the action of the traction rope 19, thereby causing the counterweight support to rotate around its hinge, thus adjusting the lowest point position of the counterweight support. The movable counterweight 14 located on the counterweight support slides along the length of the counterweight support under the action of gravity.

[0062] During unloading, the pad 6 flips upward, causing the traction rope 19 to move upward. The traction rope 19 drives the slider 17 to move upward along the longitudinal track 18 until the slider 17 reaches the upper end of the longitudinal track 18. During the movement of the slider 17, the counterweight rotates around the hinge, causing the free end of the load-bearing part 16 to be at its lowest point. At the same time, the counterweight 14 slides to the free end of the load-bearing part 16 under its own weight. Since the free end of the load-bearing part 16 is located on the side closer to the fixed box plate 1, the counterweight 14 moves to the side closer to the fixed box plate 1, thus achieving the purpose of adjusting the center of gravity.

[0063] Specifically, the load-bearing portion 16 of the counterweight gradually thins from the hinge portion toward its free end. Therefore, when the free end of the load-bearing portion 16 is rotated to fit against the base plate 3, the upper surface of the load-bearing portion 16 is an inclined surface, and the free end of the load-bearing portion 16 is lower than the hinge portion. The counterweight 14 moves toward the free end of the load-bearing portion 16 under its own weight.

[0064] The free end of the counterweight support is provided with a longitudinal rod, which is set vertically and is used to cover the counterweight 14 to prevent the counterweight 14 from sliding out of the free end of the load-bearing part 16.

[0065] A buffer pad is provided at the upper end of the longitudinal rod. A buffer pad is also provided at the lower end of the pad plate 6. When the slider 17 slides to the lower end of the longitudinal track 18, the free end of the load-bearing part 16 rises to the highest point. At this time, the buffer pad of the longitudinal rod abuts against the buffer pad under the pad plate 6 to achieve the purpose of buffering and reduce the vibration of the box.

[0066] To prevent the counterweight 14 from sliding towards the traction part 15, the traction part 15 is designed as an arc-shaped rod, arching upwards and reaching its highest point in the middle, which is higher than the height of the counterweight 14. Therefore, the traction part 15 and the load-bearing part 16 form an obtuse angle at the hinge point. When the slider 17 is at the lowest point of the longitudinal track 18, the hinge of the counterweight support is at its lowest point, and the counterweight 14 is held at the upper end of the hinge by the obtuse-angled traction part 15 and load-bearing part 16.

[0067] The counterweight 14 is a horizontally arranged cylinder; the counterweight 14 is slidably positioned on the upper end of the counterweight support.

[0068] Multiple counterweight components can be spaced apart along the length of the compartment; all counterweight components have the same structure.

[0069] In the second embodiment, please refer to Figure 4The traction component includes a bottom slide rail 22, a threaded rod 23, and a drive rope 25. The bottom slide rail 22 is located on the side of the lower chamber near the fixed panel 1, and the length direction of the bottom slide rail 22 is consistent with the width direction of the chamber. The lower end of the counterweight 14 is slidably engaged with the bottom slide rail 22. The height of the upper end face of the bottom slide rail 22 gradually decreases from the side near the fixed panel 1 to the other side. The threaded rod 23 is located above the bottom slide rail 22 and is parallel to the upper end face of the bottom slide rail 22. The threaded rod 23 passes through the counterweight 14 and is threadedly engaged with the rotating bearing 24 inside the counterweight 14. The drive rope 25 connects the lower end of the pad 6 and the counterweight 14, and the drive rope 25 is elastic.

[0070] The counterweight 14 includes a counterweight body and a rotating bearing 24; the rotating bearing 24 is located inside the counterweight body and is threadedly engaged with the threaded rod 23; the lower end of the counterweight body is slidably engaged with the bottom slide rail 22, and the upper end of the counterweight body is connected to the drive rope 25.

[0071] In this embodiment, the length direction of the bottom slide rail 22 is consistent with the width direction of the compartment. A threaded rod 23 is provided above the bottom slide rail 22. The threaded rod 23 passes through the counterweight 14 and is threadedly engaged with the rotating bearing 24 inside the counterweight 14. When the drive rope 25 moves towards the side of the fixed compartment 1 connected to the counterweight 14, the end of the drive rope 25 is connected to the upper end of the lifting assembly. When the lifting assembly extends, the drive rope 25 drives the counterweight 14 to move towards the side of the fixed compartment 1 under the traction force.

[0072] When a reset is required, the force on the drive rope 25 is reduced or removed; under the action of gravity, the counterweight 14 moves along the bottom slide rail 22 toward the side away from the fixed panel 1.

[0073] Optionally, the side of the bottom slide rail 22 away from the fixed panel 1 is located in the middle of the bottom plate 3.

[0074] In some possible embodiments, please refer to Figure 4 The support assembly also includes a buffer structure, which includes a drive gear and a one-way damping gear 28. The drive gear is located on one side of the hinge shaft and rotates synchronously with the hinge shaft. The one-way damping gear 28 is located in the lower chamber and meshes with the drive gear.

[0075] A drive gear is fitted onto the hinge shaft, and the drive gear is interference-fitted with the hinge shaft, so the drive gear rotates synchronously with the hinge shaft. A one-way damping gear meshes with one side of the drive gear.

[0076] When the pad 6 flips upward, the drive gear rotates synchronously in the forward direction, driving the one-way damping gear to rotate in the forward direction. When the pad 6 flips downward, it descends slowly under the drive of the one-way damping gear. Because the one-way damping gear meshes with the drive gear, the problem of the pad 6 falling rapidly when the lifting mechanism is worn out is avoided.

[0077] To solve the problem of inconvenient installation of the unidirectional damping gear, an auxiliary gear set can be installed between the drive gear and the unidirectional damping gear. The auxiliary gear set includes an auxiliary shaft located in the lower chamber, a first auxiliary gear 26, and a second auxiliary gear 27. Both the first auxiliary gear 26 and the second auxiliary gear 27 are sleeved on the auxiliary shaft, and the first auxiliary gear 26 and the second auxiliary gear 27 rotate synchronously with the aid of the auxiliary shaft. The first auxiliary gear 26 is connected or meshed with the drive gear through a chain, and the unidirectional damping gear meshes with the second auxiliary gear 27.

[0078] In some possible embodiments, please refer to Figure 1 and Figure 4 The lifting assembly includes a mounting base and a telescopic component 9. The mounting base includes a top column 11, a support plate 10, and multiple elastic supports. The top column 11 is located on the bottom plate 3 of the compartment, and the upper end of the top column 11 is hinged to the support plate 10. The rotation direction of the support plate 10 is perpendicular to the length direction of the compartment. Multiple elastic supports are located in pairs on both sides of the top column 11. The upper end of the elastic support is connected to the lower end of the support plate 10, and the elastic support has longitudinal freedom. The telescopic component 9 is located at the upper end of the support plate 10, and the upper end of the telescopic component 9 is hinged to the lower end of the pad plate 6.

[0079] The upper end of the top column 11 is hinged to a support plate 10, allowing the support plate 10 to swing left and right along the width of the compartment, thereby enabling the telescopic member 9 located at the upper end of the support plate 10 to adapt to the tilt of the pad 6. An elastic support member is provided at the lower end of the support plate 10, which can play a role in damping and shock absorption.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A semi-trailer body for easy loading and unloading of materials, characterized in that, include: The body has a discharge panel and a fixed panel (1) on both sides. The discharge panel includes a fixed section (4) and a movable section (5). The movable section (5) is hinged to the upper end of the fixed section (4) and flips towards the outside of the body. A support assembly is provided inside the compartment. The support assembly includes a limiting member (2), a pad (6), and a lifting assembly. The limiting member (2) is located inside the fixed compartment panel (1). The pad (6) is hinged to the compartment via a hinge shaft on the side near the unloading compartment panel, and the side of the pad (6) away from the unloading compartment panel overlaps the limiting member (2). The pad (6) divides the inner cavity of the compartment into a lower chamber and an upper chamber, and the pad (6) is located above the fixed section (4). The lifting assembly is located in the lower chamber, and its upper end is hinged to the lower end of the pad (6). A counterweight assembly is disposed in the lower chamber. The counterweight assembly includes a traction member and a counterweight (14). The counterweight (14) has a degree of freedom toward the side closer to the fixed compartment plate (1). The traction member connects the pad plate (6) and the counterweight (14). The pad plate (6) rotates to drive the traction member to push the counterweight (14) toward the side closer to the fixed compartment plate (1). The pad (6) has an extension groove with a slot facing the fixed panel (1) on one side. An extension plate (8) is provided in the extension groove and the extension plate (8) is movable along the depth direction of the extension groove. An elastic element (12) is provided between the extension plate (8) and the bottom of the extension groove. The elastic element (12) drives the free end of the extension plate (8) to extend out of the extension groove and abut against the fixed panel (1). The upper end of the pad (6) is also provided with a baffle (7), which is hinged to the pad (6); the lower end of the baffle (7) is connected to a flexible rope, and the end of the flexible rope is connected to the rear end of the extension plate (8). A blocking block (20) is provided on one side of the baffle (7). The blocking block (20) is slidably disposed on the upper end of the pad (6) in the longitudinal direction. The blocking block (20) includes an inclined surface, and the upper end of the inclined surface is attached to the side wall of the baffle (7). A reset member is provided at the lower end of the blocking block (20). The reset member has a longitudinal degree of freedom.

2. The semi-trailer carriage for easy loading and unloading of materials as described in claim 1, characterized in that, The bottom of the extension groove is connected to a connecting hole arranged along the width direction of the pad (6), and a connecting rod (13) is slidably arranged in the connecting hole; the front end of the connecting rod (13) is connected to the tail end of the extension plate (8), and the connecting rod (13) is also provided with a connecting part for connecting the flexible rope.

3. A semi-trailer carriage for easy loading and unloading of materials as described in claim 1, characterized in that, The traction component includes: Longitudinal track (18) is longitudinally located on the side of the bottom plate (3) of the compartment near the unloading compartment plate; The counterweight support includes a hinge portion hinged to the middle of the base plate (3) and a traction portion (15) and a load-bearing portion (16) located on both sides of the hinge portion. The included angle between the traction portion (15) and the load-bearing portion (16) is an obtuse angle. The load-bearing portion (16) is located on the side of the hinge portion away from the unloading box plate, and the thickness of the load-bearing portion (16) gradually decreases from one end of the hinge portion to its end. The traction portion (15) includes an arc-shaped rod and a slider (17). The middle part of the arc-shaped rod protrudes upward, and the end of the arc-shaped rod away from the hinge portion is connected to the slider (17). The slider (17) is adapted to the longitudinal track (18). The counterweight (14) is slidably disposed on the counterweight support along the length direction of the counterweight support. The traction rope (19) connects the lower end of the pad (6) and the slider (17); the traction rope (19) drives the slider (17) and the traction part (15) to move upward until the load-bearing part (16) is in contact with the bottom plate (3), and the counterweight (14) moves toward one side of the fixed panel (1) under the action of gravity.

4. A semi-trailer carriage for easy loading and unloading of materials as described in claim 3, characterized in that, The counterweight (14) is a horizontally arranged cylinder; the counterweight (14) is slidably disposed on the upper end of the counterweight support.

5. A semi-trailer carriage for easy loading and unloading of materials as described in claim 1, characterized in that, The traction component includes: Bottom slide rail (22) is located on the side of the lower chamber near the fixed panel (1), and the length direction of the bottom slide rail (22) is consistent with the width direction of the chamber; the lower end of the counterweight (14) is slidably engaged with the bottom slide rail (22); the height of the upper end face of the bottom slide rail (22) gradually decreases from the side near the fixed panel (1) to the other side; A threaded rod (23) is provided above the bottom slide rail (22) and is parallel to the upper end face of the bottom slide rail (22); the threaded rod (23) passes through the counterweight (14) and is threadedly engaged with the rotating bearing (24) inside the counterweight (14); A drive rope (25) is connected to the lower end of the pad (6) and the counterweight (14); the drive rope (25) is elastic.

6. A semi-trailer carriage for easy loading and unloading of materials as described in claim 1, characterized in that, The support component further includes a buffer structure, the buffer structure comprising: A drive gear is located on one side of the hinge shaft, and the drive gear rotates synchronously with the hinge shaft; A one-way damping gear (28) is disposed in the lower cavity, and the one-way damping gear (28) meshes with the drive gear.

7. A semi-trailer carriage for easy loading and unloading of materials as described in claim 1, characterized in that, The lifting assembly includes: The mounting base includes a top column (11), a support plate (10), and multiple elastic supports. The top column (11) is mounted on the bottom plate (3) of the compartment, and the upper end of the top column (11) is hinged to the support plate (10). The rotation direction of the support plate (10) is perpendicular to the length direction of the compartment. The multiple elastic supports are respectively located in pairs on both sides of the top column (11), and the upper end of the elastic support is connected to the lower end of the support plate (10), and the elastic support has longitudinal freedom. Telescopic component (9) is located at the upper end of the support plate (10), and the upper end of the telescopic component (9) is hinged to the lower end of the pad plate (6).

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