A rear door reinforcing device for a rear folding van
By adding reinforcing components to the rear door, including reinforcing ribs and limiting components, the problems of deformation and leakage caused by material impact during transportation are solved, achieving the rear door's sturdiness, durability, and sealing, ensuring safety and cleanliness during transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG RUNYU GUANGYI SPECIAL PURPOSE VEHICLE MANUFACTURING CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-07-14
AI Technical Summary
The existing back door is easily impacted by materials during transportation, which can cause deformation after long-term use, leading to material leakage and affecting transportation.
The system employs reinforced components, including a first reinforcing rib, a second reinforcing rib, a limiting component, a cylinder, a slide rail, a slider, a limiting frame, a slot, a mesh plate, a cover plate, a support plate, a sealing strip, and an electromagnet. The system enhances the robustness of the rear door through a grid-like structure, and increases sealing by using triangular prisms and limits the opening and closing angle by limiting components to prevent material accumulation and leakage.
The improved durability and sealing of the rear door prevent material leakage during transportation, ensuring safety and cleanliness during transport.
Smart Images

Figure CN224490806U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of freight vehicle technology, and in particular to a device for reinforcing the rear door of a rear-tipping cargo box. Background Technology
[0002] Dump trucks are widely used freight vehicles, commonly used for loading and unloading earth, sand, gravel, coal, and bulk materials. Dump truck bodies are divided into two types: rear-tipping and side-tipping. Rear-tipping is more common. When unloading, rear-tipping dump trucks typically use a front lifting device to raise the cargo box, causing it to tip backward.
[0003] When using the vehicle, the goods are loaded into the compartment and transferred with the compartment. The goods must be kept sealed at all times to prevent the leakage of broken materials through the rear door during transportation, to ensure the cleanliness of the transportation road, and to eliminate safety hazards for pedestrians.
[0004] However, the existing back door is easily impacted by materials during transportation, which can cause deformation after long-term use, leading to material leakage and affecting transportation. Summary of the Invention
[0005] The purpose of this utility model is to provide a rear door reinforcement device for a rear-tipping cargo box, which aims to solve the problem that the existing rear door is easily affected by the impact of materials during transportation, which leads to deformation of the rear door after long-term use, resulting in material leakage and affecting transportation.
[0006] To achieve the above objectives, this utility model provides a rear door reinforcement device for a rear-tipping cargo box, including a cargo box and a reinforcement component. The reinforcement component includes a rear door, a first reinforcing rib, a second reinforcing rib, a triangular prism, and a limiting component.
[0007] The rear door is rotatably connected to the carriage and located on one side of the carriage. The first reinforcing rib is fixedly connected to the rear door and located on one side of the rear door. The second reinforcing rib is fixedly connected to the rear door and located on one side of the first reinforcing rib. The triangular prism is fixedly connected to the carriage and located inside the carriage. The limiting member is connected to the rear door and to the carriage, and located on one side of the carriage.
[0008] The limiting component includes a cylinder, a slide rail, a slider, and a limiting frame. The cylinder is rotatably connected to the carriage and located on one side of the carriage. The limiting frame is fixedly connected to the rear door and located on one side of the rear door. The slide rail is fixedly installed on the limiting frame. The slider is slidably connected to the slide rail and fixedly connected to the output end of the cylinder, and located inside the slide rail.
[0009] Among them, the reinforcement component further includes a slot and a mesh plate. The slot is fixedly connected to the rear door and is located on one side of the rear door. The mesh plate is slidably connected to the slot and is located on one side of the slot.
[0010] Among them, the reinforcement component further includes a cover plate and a support plate. The cover plate is rotatably connected to the carriage and is located on the top of the carriage. The support plate is fixedly connected to the carriage and is located at the bottom of the cover plate.
[0011] Among them, the reinforcement component further includes a sealing strip and an electromagnet. The sealing strip is fixedly connected to the triangular prism and is fixedly connected to the carriage, and is located on one side of the carriage. The electromagnet is fixedly connected to the support plate and is located on one side of the support plate.
[0012] A rear flip large box rear door reinforcement device of the present utility model, through the horizontal and vertical arrangement of the first reinforcing rib and the second reinforcing rib to form a "field" - shaped structure, improves the firm durability of the rear door. The triangular prism increases the contact surface between the rear door and the carriage after closing, improving the sealing performance. And one side of the triangular prism is inclined relative to the other two sides, so that when the carriage discharges materials obliquely, it can guide the materials to be discharged, avoiding the accumulation of materials at the right - angled part inside the carriage. The limit fastener is used to limit the opening and closing angle of the rear door, solving the problem that the existing rear door is easily impacted by materials during transportation, resulting in deformation of the rear door after long - term use and material leakage, affecting transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.
[0014] Figure 1 It is a structural diagram of a rear flip large box rear door reinforcement device of the present utility model.
[0015] Figure 2 It is a structural schematic diagram of a rear flip large box rear door reinforcement device of the present utility model.
[0016] Figure 3 It is a cross - sectional schematic diagram of a rear flip large box rear door reinforcement device of the present utility model.
[0017] Figure 4 is Figure 3 An enlarged view of detail A.
[0018] 101-Carriage, 102-Reinforcement component, 103-Rear door, 104-First reinforcing rib, 105-Second reinforcing rib, 106-Triangular prism, 107-Limiting component, 108-Cylinder, 109-Slide rail, 110-Slider, 111-Limiting frame, 112-Slot, 113-Mesh plate, 114-Cover plate, 115-Support plate, 116-Sealing strip, 117-Electromagnet. Detailed Implementation
[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0020] Please see Figures 1-4 , Figure 1 This is a structural diagram of a rear door reinforcement device for a rear-tipping cargo box according to this utility model. Figure 2 This is a structural schematic diagram of a rear door reinforcement device for a rear-tipping cargo box according to this utility model. Figure 3 This is a cross-sectional schematic diagram of a rear door reinforcement device for a rear-tipping cargo box according to this utility model. Figure 4 yes Figure 3 Enlarged view of detail A.
[0021] This utility model provides a rear door reinforcement device for a rear-tipping cargo box, comprising a cargo box 101 and a reinforcement component 102. The reinforcement component 102 includes a rear door 103, a first reinforcing rib 104, a second reinforcing rib 105, a triangular prism 106, a limiting component 107, a cylinder 108, a slide rail 109, a slider 110, a limiting frame 111, a slot 112, a mesh plate 113, a cover plate 114, a support plate 115, a sealing strip 116, and an electromagnet 117. This solution addresses the problem that existing rear doors are easily impacted by materials during transportation, leading to deformation over long-term use and material leakage that affects transportation.
[0022] In this embodiment, the rear door 103 is rotatably connected to the carriage 101 and is located on one side of the carriage 101. The first reinforcing rib 104 is fixedly connected to the rear door 103 and is located on one side of the rear door 103. The second reinforcing rib 105 is fixedly connected to the rear door 103 and is located on one side of the first reinforcing rib 104. The triangular prism 106 is fixedly connected to the carriage 101 and is located inside the carriage 101. The limiting member 107 is connected to the rear door 103 and is connected to the carriage 101 and is located on one side of the carriage 101. The "field" - shaped structure is formed by the vertical and horizontal arrangement of the first reinforcing rib 104 and the second reinforcing rib 105, which improves the durability of the rear door 103. The triangular prism 106 increases the contact surface between the rear door 103 and the carriage 101 after the rear door 103 is closed, improving the sealing performance. And one side of the triangular prism 106 is inclined relative to the other two sides, so that when the carriage 101 discharges materials obliquely, it can guide the materials to be discharged, avoiding the accumulation of materials at the right - angled corners inside the carriage 101. The limiting member 107 is used to limit the opening and closing angle of the rear door 103, solving the problem that the existing rear door is easily impacted by materials during transportation, resulting in deformation of the rear door after long - term use and material leakage, which affects transportation.
[0023] Wherein, the limiting member 107 includes a cylinder 108, a slide rail 109, a slider 110 and a limiting frame 111. The cylinder 108 is rotatably connected to the carriage 101 and is located on one side of the carriage 101. The limiting frame 111 is fixedly connected to the rear door 103 and is located on one side of the rear door 103. The slide rail 109 is fixedly installed on the limiting frame 111. The slider 110 is slidably connected to the slide rail 109 and is fixedly connected to the output end of the cylinder 108 and is located inside the slide rail 109. By driving the limiting frame 111 at one end of the slider 110 by the cylinder 108, the rotation of the rear door 103 is controlled, realizing the opening and closing between the rear door 103 and the carriage 101.
[0024] Secondly, the reinforcement component 102 further includes a slot 112 and a mesh plate 113. The slot 112 is fixedly connected to the rear door 103 and is located on one side of the rear door 103. The mesh plate 113 is slidably connected to the slot 112 and is located on one side of the slot 112. The slot 112 is used to install the mesh plate 113. By the mesh plate 113, large - sized materials are prevented from directly contacting the rear door 103, thereby reducing the impact on the rear door 103. The sliding installation method facilitates the removal for repair or replacement of the mesh plate 113.
[0025] Again, the reinforcement component 102 further includes a cover plate 114 and a support plate 115. The cover plate 114 is rotatably connected to the carriage 101 and is located at the top of the carriage 101. The support plate 115 is fixedly connected to the carriage 101 and is located at the bottom of the cover plate 114. The cover plate 114 is used to cover the top of the carriage 101, reducing the erosion of rainwater on the transported goods and preventing objects from falling into the interior of the carriage 101. The support plate 115 is used to limit the rotational position of the cover plate 114.
[0026] Finally, the reinforcement component 102 further includes a sealing strip 116 and an electromagnet 117. The sealing strip 116 is fixedly connected to the triangular prism 106 and is also fixedly connected to the carriage 101, and is located on one side of the carriage 101. The electromagnet 117 is fixedly connected to the support plate 115 and is located on one side of the support plate 115. The sealing strip 116 is used to increase the sealing performance between the rear door 103 and the carriage 101 after the rear door 103 is closed, reducing the leakage of materials from the gap. When the cover plate 114 closes to seal the top of the carriage 101, the electromagnet 117 is energized to magnetically limit the cover plate 114.
[0027] When using a rear - tipping large - box rear - door reinforcement device of the present utility model, the "field" - shaped structure formed by the longitudinal and transverse arrangement of the first reinforcing rib 104 and the second reinforcing rib 105 makes the rear door 103 more durable. The triangular prism 106 increases the contact surface between the rear door 103 and the carriage 101 after the rear door 103 is closed, improving the sealing performance. Moreover, one side of the triangular prism 106 is inclined relative to the other two sides, so that when the carriage 101 discharges materials in an inclined manner, it can guide the materials to be discharged, preventing the materials from accumulating at the right - angled corners inside the carriage 101. The limiting member 107 is used to limit the opening and closing angle of the rear door 103, solving the problem that the existing rear door is easily impacted by materials during transportation, resulting in deformation of the rear door after long - term use and material leakage, which affects transportation.
[0028] The above - disclosed content is only a preferred embodiment of a rear - tipping large - box rear - door reinforcement device of the present utility model. Of course, it cannot be used to limit the scope of the rights of the present utility model. Those of ordinary skill in the art can understand all or part of the processes of implementing the above - mentioned embodiment, and the equivalent changes made according to the claims of the present utility model still fall within the scope covered by the utility model.
Claims
1. A rear door reinforcement device for a rear-tipping cargo box, comprising a cargo box, characterized in that: It also includes a reinforcement component, which includes a rear door, a first reinforcing rib, a second reinforcing rib, a triangular prism, and a limiting component; The rear door is rotatably connected to the carriage and located on one side of the carriage. The first reinforcing rib is fixedly connected to the rear door and located on one side of the rear door. The second reinforcing rib is fixedly connected to the rear door and located on one side of the first reinforcing rib. The triangular prism is fixedly connected to the carriage and located inside the carriage. The limiting member is connected to the rear door and to the carriage, and located on one side of the carriage.
2. The rear door reinforcement device for a rear-tipping cargo box as described in claim 1, characterized in that: The limiting component includes a cylinder, a slide rail, a slider, and a limiting frame. The cylinder is rotatably connected to the carriage and located on one side of the carriage. The limiting frame is fixedly connected to the rear door and located on one side of the rear door. The slide rail is fixedly installed on the limiting frame. The slider is slidably connected to the slide rail and fixedly connected to the output end of the cylinder, and located inside the slide rail.
3. The rear door reinforcement device for a rear-tipping cargo box as described in claim 2, characterized in that: The reinforcement assembly also includes a slot and a mesh plate. The slot is fixedly connected to the rear door and located on one side of the rear door. The mesh plate is slidably connected to the slot and located on one side of the slot.
4. The rear door reinforcement device for a rear-tipping cargo box as described in claim 3, characterized in that: The reinforcement assembly also includes a cover plate and a support plate. The cover plate is rotatably connected to the carriage and located on top of the carriage, while the support plate is fixedly connected to the carriage and located at the bottom of the cover plate.
5. The rear door reinforcement device for a rear-tipping cargo box as described in claim 4, characterized in that: The reinforcement assembly also includes a sealing strip and an electromagnet. The sealing strip is fixedly connected to the triangular prism and to the carriage, and is located on one side of the carriage. The electromagnet is fixedly connected to the support plate and is located on one side of the support plate.