Rear-discharge semi-trailer cargo box and semi-trailer with tilting cylinder

Abstract

This utility model provides a rear-discharge semi-trailer body and semi-trailer with a tilting hydraulic cylinder, including a semi-trailer frame, a hydraulic cylinder, an upper frame assembly, a hydraulic cylinder fixing plate assembly, and a front box assembly. The upper frame assembly is of the same length as the semi-trailer frame. A frame towing pin and a lower hydraulic cylinder support are respectively provided on the semi-trailer frame, with the lower hydraulic cylinder support closely attached to the frame towing pin. An upper hydraulic cylinder support is located inside the hydraulic cylinder fixing plate assembly. The telescopic end of the hydraulic cylinder is located on the lower hydraulic cylinder support, and the middle part of the hydraulic cylinder is connected to the upper hydraulic cylinder support via a fixing trunnion. This allows the lifting force at the top of the hydraulic cylinder to be transmitted through the hydraulic cylinder fixing plate assembly to the upper frame assembly and the front box assembly during lifting, while the supporting force at the bottom of the hydraulic cylinder is directly transmitted to the frame towing pin. The upper hydraulic cylinder support is located diagonally above the lower hydraulic cylinder support. This rear-discharge semi-trailer body and semi-trailer with a tilting hydraulic cylinder ensures lifting stability of the rear-discharge semi-trailer while increasing the cargo box volume.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailers, specifically to a rear-discharge semi-trailer body and semi-trailer with a tilting cylinder. Background Technology

[0002] Currently, most rear-dump semi-trailers on the market use a vertically arranged hydraulic cylinder layout, with the cylinders positioned on the outside of the front cargo box. To maximize the internal length of the cargo box, the cylinders are generally placed far from the frame's towing pin. This means that during heavy-load lifting, the cylinders, relative to the frame's towing pin, act like a cantilever beam, causing them to bend downwards relative to the towing pin. If the deformation of the left and right beams is inconsistent, it can easily lead to rollover, a significant factor contributing to the instability of traditional lifting structures. Furthermore, the traditional cylinder layout typically leaves a 50cm gap between the cylinders and the front of the frame, preventing the cargo box's internal length from matching the front of the frame and hindering the maximization of cargo volume.

[0003] Utility model patent application number 200920143899.7 discloses a built-in hydraulic cylinder lifting mechanism for a front-mounted top dump truck, including a hydraulic cylinder, a truck body, an upper support, and a lower support. The hydraulic cylinder is an FC-type hydraulic cylinder installed inside the truck body. A through hole is provided at the front end of the truck body floor corresponding to the position of the lower support. The upper support is fixed to the upper rear side of the front panel of the truck body. The lower end of the FC-type hydraulic cylinder passes through the through hole and is mounted on the lower support using a pin. Simultaneously, the upper end of the FC-type hydraulic cylinder is mounted on the upper support via a connecting pin through a pin hole. This built-in hydraulic cylinder lifting mechanism for a front-mounted top dump truck increases the volume of the truck body and reduces the difficulty of hydraulic cylinder installation. However, the disclosed structure of this built-in hydraulic cylinder lifting mechanism directly connects the upper end of the FC-type hydraulic cylinder to the front panel of the truck body, causing the hydraulic cylinder to be far from the traction pin of the chassis, resulting in unstable lifting. Utility Model Content

[0004] In order to ensure the lifting stability of the rear-discharge semi-trailer while increasing the cargo box volume, the technical solution adopted by this utility model is: a rear-discharge semi-trailer cargo box with a tilting cylinder, including a semi-trailer frame, a cylinder, an upper frame assembly, a cylinder fixing plate assembly and a front cargo box assembly. The bottom of the cylinder fixing plate assembly is fixed to the upper frame assembly, and the front end of the cylinder fixing plate assembly is connected to the inner side of the front cargo box assembly. The upper frame assembly is set to the same length as the semi-trailer frame; The semi-trailer frame is respectively provided with a frame traction pin and a cylinder lower support, and the cylinder lower support is set close to the frame traction pin; The cylinder fixing plate assembly has an upper cylinder support inside, the telescopic end of the cylinder is set on the lower cylinder support, and the middle part of the cylinder is connected to the upper cylinder support through a fixed trunnion, so that when the cylinder is lifted, the lifting force at the top of the cylinder is transmitted to the upper frame assembly and the front box assembly through the cylinder fixing plate assembly, and the supporting force at the bottom of the cylinder is directly transmitted to the frame traction pin. The upper support of the hydraulic cylinder is located diagonally above the lower support of the hydraulic cylinder, so that the hydraulic cylinder is obliquely housed inside the hydraulic cylinder fixing plate assembly in the retracted state. The hydraulic cylinder is an FC type.

[0005] Beneficial effects: On the one hand, by installing a cylinder mounting plate assembly between the rear of the front box assembly and the upper frame assembly, and mounting the upper cylinder support on the cylinder mounting plate assembly, it is possible to ensure that the lifting force at the top of the cylinder is directly transmitted to the rear of the front box assembly and the upper frame assembly, ensuring uniform force distribution. Simultaneously, the cylinder's installation position can be moved rearward. On the other hand, by shortening the distance between the lower cylinder support and the frame towing pin, it is ensured that the supporting force is directly transmitted to the frame towing pin, improving the lifting stability at the bottom of the cylinder.

[0006] Based on the above, the distance between the axis of the lower support of the hydraulic cylinder and the axis of the traction pin of the vehicle frame ranges from 0 to 500 mm.

[0007] Beneficial effects: By limiting the distance range between the axis of the lower support of the hydraulic cylinder and the axis of the traction pin of the vehicle frame, the hydraulic cylinder can be guaranteed to have sufficient extension and retraction range while ensuring the lifting stability of the hydraulic cylinder, which facilitates lifting and unloading.

[0008] Based on the above, the cylinder fixing plate assembly includes an upper cylinder fixing plate, a lower cylinder fixing plate, and a top sealing plate. The upper cylinder fixing plate is conical and connected to the top of the lower cylinder fixing plate. The upper cylinder support is disposed on the lower cylinder fixing plate. The lower cylinder fixing plate is equipped with an internal cylinder seat liner, a cylinder seat reinforcing upright plate, and a cylinder seat reinforcing cross brace corresponding to the upper cylinder support, to ensure a stable connection between the upper cylinder support and the lower cylinder fixing plate. The upper frame assembly also includes a side compartment assembly and a rear compartment assembly. The width of the cylinder fixing plate assembly is smaller than the width of the upper frame assembly, creating a loading space between the cylinder fixing plate assembly and the side compartment assembly.

[0009] Beneficial effects: It can increase the structural strength of the support where the hydraulic cylinder is installed, ensuring lifting safety.

[0010] Based on the above, the central axis of the upper support of the hydraulic cylinder coincides with the central axis of the lower hydraulic cylinder fixing plate, and the central axis of the lower support of the hydraulic cylinder coincides with the central axis of the semi-trailer frame.

[0011] Beneficial effects: It can avoid a large deviation between the central axis of the hydraulic cylinder and the central axis of the upper frame assembly, ensuring uniform force distribution on the upper frame assembly.

[0012] Based on the above, an inspection port is provided on the lower cylinder fixing plate, and an inspection port sealing plate is provided on the inspection port.

[0013] Beneficial effect: It facilitates the observation and maintenance of the upper support of the hydraulic cylinder.

[0014] Based on the above, the front compartment assembly includes a front compartment upper crossbeam, a front compartment sealing plate, a right front pillar, and a left front pillar, wherein the front compartment upper crossbeam and the front compartment sealing plate are respectively connected between the right front pillar and the left front pillar; The cylinder fixing plate assembly is connected to the upper crossbeam of the front compartment and the front compartment sealing plate respectively, so that when the cylinder is lifted, the lifting force in the middle of the cylinder is transmitted to the upper crossbeam of the front compartment and the front compartment sealing plate.

[0015] Beneficial effects: By specifically defining the structure of the front box assembly, the structural strength of the front box assembly can be enhanced, ensuring that the upper crossbeam, right front pillar and left front pillar of the front box can withstand the lifting force at the top of the hydraulic cylinder.

[0016] Based on the above, the front cover plate is provided with a clearance hole at the position of the hydraulic cylinder fixing plate assembly to allow the hydraulic cylinder to extend and retract.

[0017] Based on the above, a hydraulic oil tank is provided inside the cylinder fixing plate assembly, and the hydraulic oil tank is located on one side of the cylinder.

[0018] Beneficial effects: The hydraulic oil tank can be set up close to the oil cylinder, which facilitates the supply of oil to the oil cylinder. At the same time, the hydraulic cylinder can be protected by the oil cylinder fixing plate assembly.

[0019] This utility model also provides a semi-trailer, which includes the aforementioned rear-discharge semi-trailer cargo box with tilting cylinder.

[0020] This utility model has substantial features and advancements compared to existing technologies. Specifically, the utility model provides a rear-discharge semi-trailer body and semi-trailer with a tilting hydraulic cylinder. The body adopts an embedded front body structure, with the hydraulic cylinder embedded inside the front body. An upper support for the hydraulic cylinder is provided on the hydraulic cylinder fixing plate assembly, and a lower support for the hydraulic cylinder is provided near the frame towing pin. The hydraulic cylinder is connected to the hydraulic cylinder fixing plate assembly and the front body assembly through a fixing trunnion in the middle of the hydraulic cylinder and the upper support. Compared to traditional hydraulic cylinder layouts, this hydraulic cylinder can be moved rearward to near the frame towing pin, ensuring that when the hydraulic cylinder is lifted, the supporting force of the hydraulic cylinder can be directly transmitted to the frame towing pin, and then to the tractor saddle. This avoids the cantilever beam structure formed by the excessive distance between the hydraulic cylinder and the frame towing pin, and avoids the phenomenon of instability during lifting due to excessive deformation of the main beam.

[0021] Furthermore, the hydraulic cylinder adopts an inclined layout, which can shorten the phenomenon of the hydraulic cylinder fixing plate being too wide when the hydraulic cylinder is in a vertical state, and achieve a compact arrangement of the hydraulic system. This allows the carriage to be extended forward to the same length as the front of the frame, thereby increasing the volume of the carriage by increasing the internal control length.

[0022] Furthermore, by designing the cylinder fixing plate assembly as a structure consisting of a top sealing plate, an upper cylinder fixing plate, and a lower cylinder fixing plate, and by adopting a conical structure for the upper cylinder fixing plate with a cross-section similar to an isosceles trapezoid, the area of ​​the upper fixing plate can be reduced to the greatest extent, achieving a lightweight design for the trailer while greatly increasing the cargo box volume.

[0023] Furthermore, by adopting a rectangular cross-section for the lower cylinder fixing plate, the installation dimensions of the upper cylinder support can be met. Additionally, a triangular hole is provided on the lower cylinder fixing plate corresponding to the upper cylinder support, facilitating the installation and maintenance of the upper cylinder support.

[0024] Therefore, the rear-discharge semi-trailer with tilting cylinders ensures the lifting stability of the rear-discharge semi-trailer by optimizing the distance between the cylinder and the frame traction pin, and the distance between the cylinder and the rear tipping seat. Furthermore, the tilting cylinder layout greatly increases the volume of the cargo box. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the rear-discharge semi-trailer cargo box with tilting cylinder provided by this utility model.

[0026] Figure 2 This is a schematic diagram of the rear-discharge semi-trailer cargo box with tilting cylinder and the front end structure of the cargo box in the semi-trailer provided by this utility model.

[0027] Figure 3This is a schematic diagram of the rear-discharge semi-trailer cargo box with tilting cylinder and the side structure of the cargo box in the semi-trailer provided by this utility model.

[0028] Figure 4 This is a schematic diagram of the rear-discharge semi-trailer cargo box with tilting cylinder provided by this utility model, and the interior of the cargo box in the semi-trailer.

[0029] Figure 5 This is a schematic diagram of the rear-discharge semi-trailer cargo box with tilting cylinder and a partial structure of the cargo box in the semi-trailer provided by this utility model.

[0030] Figure 6 This utility model provides a schematic diagram of the rear-discharge semi-trailer cargo box with tilting cylinder and the front end structure of the cargo box after removing the cylinder.

[0031] In the diagram: 1. Hydraulic cylinder mounting plate assembly; 2. Side compartment assembly; 3. Front compartment assembly; 4. Frame towing pin; 5. Semi-trailer frame; 6. Hydraulic cylinder; 7. Hydraulic oil tank; 8. Upper hydraulic cylinder support; 9. Lower hydraulic cylinder support; 10. Right side compartment assembly; 11. Rear compartment assembly; 12. Upper frame assembly; 13. Left side compartment assembly; 14. Inspection port sealing plate; 15. Left front pillar; 16. Front compartment sealing plate; 17. Right front pillar; 18. Hydraulic cylinder seat internal lining plate; 19. Hydraulic cylinder seat reinforcing upright plate; 20. Hydraulic cylinder seat reinforcing cross brace; 21. Top sealing plate; 22. Upper hydraulic cylinder mounting plate; 23. Lower hydraulic cylinder mounting plate; 24. Upper crossbeam of the front compartment. Detailed Implementation

[0032] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0033] Example 1 This embodiment provides a rear-discharge semi-trailer cargo box and semi-trailer with a tilting hydraulic cylinder, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the vehicle includes a semi-trailer frame 5, a hydraulic cylinder 6, a top frame assembly 12, a hydraulic cylinder fixing plate assembly 1, and a front box assembly 3. The bottom of the hydraulic cylinder fixing plate assembly 1 is fixed to the top frame assembly 12, and the front end of the hydraulic cylinder fixing plate assembly 1 is connected to the inner side of the front box assembly 3.

[0034] The upper frame assembly 12 is of the same length as the semi-trailer frame 5. The semi-trailer frame 5 is respectively provided with a frame towing pin 4 and a cylinder lower support 9. The cylinder lower support 9 is set close to the frame towing pin 4.

[0035] The cylinder fixing plate assembly 1 has an upper cylinder support 8 inside, and the telescopic end of the cylinder 6 is mounted on the lower cylinder support 9. The middle part of the cylinder 6 is connected to the upper cylinder support 8 via a fixed trunnion, so that when the cylinder 6 is lifted, the lifting force at the top of the cylinder 6 is transmitted through the cylinder fixing plate assembly 1 to the upper frame assembly 12 and the front box assembly 3, and the supporting force at the bottom of the cylinder 6 is directly transmitted to the frame traction pin 4.

[0036] The upper support 8 of the hydraulic cylinder is located diagonally above the lower support 9 of the hydraulic cylinder, so that the hydraulic cylinder 6 is obliquely housed inside the hydraulic cylinder fixing plate assembly 1 in a retracted state. The hydraulic cylinder is an FC type hydraulic cylinder.

[0037] In this embodiment, the distance between the axis of the lower support 9 of the hydraulic cylinder and the axis of the traction pin 4 of the vehicle frame can be selected from 0 to 500 mm.

[0038] Specifically, such as Figure 5 As shown, the cylinder fixing plate assembly 1 includes an upper cylinder fixing plate 22, a lower cylinder fixing plate 23, and a top sealing plate 21. The upper cylinder fixing plate 22 is conical and connected to the top of the lower cylinder fixing plate 23. The upper cylinder support 8 is disposed on the lower cylinder fixing plate 23.

[0039] The lower cylinder fixing plate 23 is provided with an internal cylinder seat liner 18, a cylinder seat reinforcing upright plate 19, and a cylinder seat reinforcing cross brace 20 at the location corresponding to the upper cylinder support 8, so as to ensure a stable connection between the upper cylinder support 8 and the lower cylinder fixing plate 23. The upper frame assembly 12 also includes a side compartment assembly 2 and a rear compartment assembly 11. The width of the cylinder fixing plate assembly is smaller than the width of the upper frame assembly, creating a loading space between the cylinder fixing plate assembly and the side compartment assembly. Depending on their distribution, the side compartment assembly 2 includes a right side compartment assembly 10 and a left side compartment assembly 13.

[0040] Specifically, such as Figure 5 As shown, the front compartment assembly 3 includes a front compartment upper crossbeam 24, a front compartment sealing plate 16, a right front pillar 17, and a left front pillar 15. The front compartment upper crossbeam 24 and the front compartment sealing plate 16 are respectively connected between the right front pillar 17 and the left front pillar 15.

[0041] The cylinder fixing plate assembly 1 is connected to the upper crossbeam 24 of the front compartment and the front compartment sealing plate 16, respectively, so that when the cylinder 6 is lifted, the lifting force in the middle of the cylinder 6 is transmitted to the upper crossbeam 24 of the front compartment and the front compartment sealing plate 16. The front compartment sealing plate 16 has a clearance hole at the position corresponding to the cylinder fixing plate assembly 1 to facilitate the extension and retraction of the cylinder 6.

[0042] Example 2 This embodiment provides a rear-discharge semi-trailer trailer with a tilting cylinder. The difference from Embodiment 1 is that in this embodiment, the central axis of the upper cylinder support 8 coincides with the central axis of the lower cylinder fixing plate 23, and the central axis of the lower cylinder support 9 coincides with the central axis of the semi-trailer frame 5. This limitation avoids a large deviation between the central axis of the cylinder and the central axis of the upper frame assembly, ensuring uniform force distribution on the upper frame assembly.

[0043] Example 3 This embodiment provides a rear-discharge semi-trailer with a tilting cylinder. The difference from embodiment 1 is that in this embodiment, the lower cylinder fixing plate 23 is provided with an inspection port, and the inspection port is provided with an inspection port sealing plate 14, so as to facilitate the observation and maintenance of the upper support of the cylinder.

[0044] Example 4 This embodiment provides a rear-discharge semi-trailer with a tilting cylinder. The difference from embodiment 1 is that in this embodiment, a hydraulic oil tank 7 is provided inside the cylinder fixing plate assembly 1. The hydraulic oil tank 7 is located on one side of the cylinder 6, so that the hydraulic oil tank can be set close to the cylinder, which facilitates the supply of oil to the cylinder. At the same time, the hydraulic cylinder can be protected by the cylinder fixing plate assembly.

[0045] Example 5 This embodiment provides a semi-trailer that includes the rear-discharge semi-trailer cargo box with tilting cylinders provided in Embodiment 1.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A rear discharge semitrailer bed having a tilting cylinder, characterised in that: It includes a semi-trailer frame, hydraulic cylinders, a frame assembly, a hydraulic cylinder mounting plate assembly, and a front box assembly. The bottom of the hydraulic cylinder mounting plate assembly is fixed to the frame assembly, and the front end of the hydraulic cylinder mounting plate assembly is connected to the inside of the front box assembly. The upper frame assembly is set to the same length as the semi-trailer frame; The semi-trailer frame is respectively provided with a frame traction pin and a cylinder lower support, and the cylinder lower support is set close to the frame traction pin; The cylinder fixing plate assembly is provided with an upper cylinder support inside, the telescopic end of the cylinder is provided on the lower cylinder support, and the middle part of the cylinder is connected to the upper cylinder support through a fixed trunnion, so that when the cylinder is lifted, the lifting force at the top of the cylinder is transmitted to the upper frame assembly and the front box assembly through the cylinder fixing plate assembly, and the supporting force at the bottom of the cylinder is directly transmitted to the frame traction pin. The upper support of the hydraulic cylinder is located diagonally above the lower support of the hydraulic cylinder, so that the hydraulic cylinder is obliquely housed inside the hydraulic cylinder fixing plate assembly in the retracted state.

2. The rear dump trailer bed with tilting ram according to claim 1, characterized in that: The distance between the axis of the lower support of the hydraulic cylinder and the axis of the traction pin of the vehicle frame ranges from 0 to 500 mm.

3. The rear dump trailer bed with tilting ram as claimed in claim 1, characterized in that: The cylinder fixing plate assembly includes an upper cylinder fixing plate, a lower cylinder fixing plate, and a top sealing plate. The upper cylinder fixing plate is conical and connected to the top of the lower cylinder fixing plate. The upper cylinder support is disposed on the lower cylinder fixing plate. The lower cylinder fixing plate is provided with an internal cylinder seat liner, a cylinder seat reinforcing upright plate, and a cylinder seat reinforcing cross brace at the location corresponding to the upper cylinder support, so as to ensure a stable connection between the upper cylinder support and the lower cylinder fixing plate.

4. The rear dump trailer bed with tilting ram as claimed in claim 3, characterized in that: The central axis of the upper support of the hydraulic cylinder coincides with the central axis of the lower hydraulic cylinder fixing plate, and the central axis of the lower support of the hydraulic cylinder coincides with the central axis of the semi-trailer frame.

5. A rear discharge trailer bed with tilting cylinders according to claim 3 or 4, characterized in that: The lower cylinder fixing plate has an inspection port, and the inspection port is equipped with an inspection port sealing plate.

6. The rear-discharge semi-trailer cargo box with a tilting cylinder according to claim 1, 2, 3, or 4, characterized in that: The front compartment assembly includes a front compartment upper crossbeam, a front compartment end plate, a right front pillar, and a left front pillar. The front compartment upper crossbeam and the front compartment end plate are respectively connected between the right front pillar and the left front pillar. The cylinder fixing plate assembly is connected to the upper crossbeam of the front compartment and the front compartment sealing plate respectively, so that when the cylinder is lifted, the lifting force in the middle of the cylinder is transmitted to the upper crossbeam of the front compartment and the front compartment sealing plate.

7. A rear discharge trailer bed with tilting ram as claimed in claim 6, characterised in that: The front cover plate has a clearance hole at the position corresponding to the cylinder fixing plate assembly to allow the cylinder to extend and retract.

8. The rear dump trailer bed with tilting ram cylinder of claim 7, wherein: The cylinder fixing plate assembly has a hydraulic oil tank inside, and the hydraulic oil tank is located on one side of the cylinder.

9. A semi-trailer, characterized in that: The semi-trailer includes a rear-discharge semi-trailer cargo box with a tilting cylinder as described in any one of claims 1 to 8.

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