Hydraulic folding roof for a special vehicle
The hydraulically driven triangular block connecting arm structure solves the problems of space occupation and structural complexity and easy damage of vehicle roofs, realizing safe and environmentally friendly roof opening and closing, and reducing maintenance costs.
Patent Information
- Application Number
- CN202521765333.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-19
AI Technical Summary
Adding a roof to existing vehicles takes up interior space, and the opening mechanism is complex, easily damaged, and has high maintenance costs.
The top cover is opened and closed by a hydraulically driven triangular block connecting arm structure, which is driven by the cylinder rod. The top cover is hinged to the side panel of the carriage, thus avoiding taking up interior space.
It avoids spillage and dust during cargo transportation, ensuring safety and environmental protection. At the same time, it has a simple, stable, and reliable structure, is not easily damaged, and reduces maintenance costs.
Smart Images

Figure CN224675864U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a top cover, and more specifically, to a hydraulically folding top cover for special vehicles. Background Technology
[0002] Currently, in the vehicle transportation industry, to prevent dust and spillage of transported goods (such as construction waste), which could affect personal safety and damage the environment, it is generally required that transport vehicles be equipped with roofs. Adding roofs to transport vehicles can effectively prevent material spillage and dust generation, which is beneficial to both environmental protection and personnel safety. However, adding roofs to existing vehicles will occupy a certain amount of space inside the truck bed, thus reducing the volume of the truck bed; moreover, some roof opening mechanisms use multi-link mechanisms, which are complex, prone to damage, and have high maintenance costs in the later stages. Summary of the Invention
[0003] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a special vehicle hydraulic folding top cover.
[0004] This utility model discloses a special-purpose vehicle hydraulic folding roof, comprising a carriage, two roofs, and two hydraulic cylinders. Roof fixing seats are fixed to the front and rear ends of both side panels of the carriage, and the outer sides of the roofs are hinged to the roof fixing seats via roof pins. Two hydraulic cylinder bases are fixed to the front face of the carriage, and the cylinder bodies of the two cylinders are respectively hinged to the base bases via base pins. The feature is that both hydraulic cylinders are driven to open and close the two roofs via triangular connecting arms, which are triangular in shape. When the roofs are closed: the two triangular connecting arms are arranged in a V-shape on the front face of the carriage; the lowermost apex of the triangular connecting arm is hinged to the front face of the carriage via a lower pin, and the uppermost apex of the triangular connecting arm is hinged to the inner end of the roof via an upper pin; the middle apex of the triangular connecting arm is hinged to the cylinder rod of the hydraulic cylinder via a middle pin.
[0005] The present invention relates to a hydraulic folding roof for a special vehicle, wherein both roofs are composed of an outer roof and an inner roof. The outer side of the outer roof is hinged to the roof fixing seat via a roof pin, and the outer side of the inner roof is hinged to the inner side of the outer roof via a rotating hinge. The inner layer of the inner roof is hinged to the uppermost apex of the triangular block connecting arm via an upper pin.
[0006] The present invention relates to a hydraulically folding roof for a special vehicle, wherein a reinforced connecting scale is provided on the front end face of the vehicle body, and the apex of the lowermost part of the triangular block connecting arm is hinged to the reinforced connecting scale via a lower pin.
[0007] The beneficial effects of this utility model are as follows: The hydraulic folding roof of this utility model, by setting an openable and closable compartment at the top of the vehicle body, prevents spillage and dust generation when transporting goods such as construction waste. This avoids environmental pollution and ensures the safety of surrounding personnel. The roof is hinged to a roof fixing seat on the side panel of the vehicle body via a roof pin, without occupying internal space and ensuring sufficient interior space. The hydraulic cylinder drives the roof to open and close via a triangular connecting arm. Compared with existing multi-link drive structures, this design is simple, stable, reliable, and less prone to damage. Attached Figure Description
[0008] Figure 1 This is a front view of the hydraulic folding roof for special vehicles according to this utility model; Figure 2 This is a left view of the hydraulically folding roof for special vehicles according to this utility model; Figure 3 This is a top view of the hydraulically folding roof for special vehicles according to this utility model; Figure 4 This is a schematic diagram of the hydraulic folding top cover of the special vehicle of this utility model in a semi-open state; Figure 5 This is a schematic diagram of the hydraulic folding top cover of the special vehicle of this utility model in the fully open state.
[0009] In the diagram: 1. Carriage, 2. Cylinder base, 3. Base pin, 4. Cylinder, 5. Cylinder rod, 6. Reinforcing connector, 7. Lower pin, 8. Triangular block connecting arm, 9. Middle pin, 10. Top cover fixing seat, 11. Top cover pin, 12. Outer top cover, 13. Rotating hinge, 14. Inner top cover, 15. Upper pin. Detailed Implementation
[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0011] like Figure 1 , Figure 2 and Figure 3The diagram shows the front view, left view, and top view of the hydraulic folding roof of this utility model for a special vehicle. It consists of a carriage 1, two roofs, two hydraulic cylinders 4, and two triangular connecting arms 8. The carriage 1 comprises a floor plate, two side plates, a front panel, and a rear panel (usually a rear door). The interior of the carriage 1 is a cavity for storing goods. Both roofs of the carriage 1 are composed of an outer roof 12 and an inner roof 14, but this form is not limited to. Roof fixing seats 10 are fixed to the top of both side plates of the carriage 1 at the front and rear. The outer side of the outer roof 12 is hinged to the roof fixing seat 10 via a roof pin 11, allowing the outer roof 12 to rotate on the roof fixing seat 10. The outer side of the inner roof 14 is hinged to the inner side of the outer roof 12 via a rotating hinge 13, enabling the folding and unfolding of both the outer and inner roofs.
[0012] Two cylinder bases 2 are fixed to the lower part of the front face of the carriage 1 shown. The cylinder bodies of the two cylinders 4 are hinged to the cylinder bases 2 via base pins 3. The triangular block connecting arm 8 is triangular in shape. When the top cover is closed: the two triangular block connecting arms 8 are distributed in a figure-eight shape on the front face of the carriage 1. At this time, the lowermost apex of the triangular block connecting arm 8 is hinged to the front face of the carriage 1 via the lower pin 7, and the uppermost apex of the triangular block connecting arm 8 is hinged to the inner end of the top cover (inner top cover 14) via the upper pin 15. The apex of the middle part of the triangular block connecting arm 8 is hinged to the cylinder rod 5 of the cylinder via the middle pin 9.
[0013] The opening and closing process of the hydraulic folding top cover for special vehicles of this utility model is as follows: With the top cover closed, if the top cover is to be opened, the cylinder rod 5 of the control cylinder 4 retracts. As the cylinder rod 5 retracts, it pulls the triangular block connecting arm 8 to rotate around the lower pin 7, thereby causing the uppermost apex of the triangular block connecting arm 8 to drive the inner top cover 14 and the outer top cover 12 to flip outwards. Figure 4 The diagram shows the hydraulic folding roof of the special vehicle of this utility model in a semi-open state. As the cylinder rod 5 retracts further, the apex of the triangular block connecting arm 8 will move further outward of the carriage 1 until the inner roof 14 and the outer roof 12 are folded onto the outer wall of the side panel of the carriage 1, thus realizing the full opening of the roof of the carriage 1 for loading goods.
[0014] The hydraulic folding roof of this utility model for special vehicles is not limited to the style of the vehicle body, nor is it limited to the driving method. The driving method can be power take-off from the tractor or power take-off from the hydraulic unit, etc.; it is not limited to the welding style of the roof; nor is it limited to the width of the vehicle body.
[0015] As can be seen, the hydraulic folding roof of this utility model is located on the top of the vehicle body and does not occupy the space on both sides of the vehicle body. The width of the vehicle body can be wider and the volume of the vehicle body can be larger, provided that the regulations are met.
Claims
1. A hydraulically folding roof for a special vehicle, comprising a carriage (1), two roofs and two hydraulic cylinders (4), wherein the front and rear ends of both side panels of the carriage are fixed with roof fixing seats (10), and the outer side of the roof is hinged to the roof fixing seats via roof pins (11); two hydraulic cylinder bases (2) are fixed on the front end face of the carriage, and the cylinder ends of the two hydraulic cylinders are respectively hinged to the two hydraulic cylinder bases via base pins (3); characterized in that: Both cylinders are driven by a triangular block connecting arm (8) to open and close the two top covers. The triangular block connecting arm is triangular in shape. When the top cover is closed: the two triangular block connecting arms are arranged in a figure-eight shape on the front end face of the carriage. The apex of the lowest triangular block connecting arm is hinged to the front end face of the carriage via a lower pin (7). The apex of the highest triangular block connecting arm is hinged to the inner end of the top cover via an upper pin (15). The apex of the middle part of the triangular block connecting arm is hinged to the cylinder rod (5) of the cylinder via a middle pin (9).
2. The special vehicle hydraulic folding top cover according to claim 1, characterized in that: Both top covers are composed of an outer top cover (12) and an inner top cover (14). The outer side of the outer top cover is hinged to the top cover fixing seat (10) via a top cover pin (11). The outer side of the inner top cover is hinged to the inner side of the outer top cover via a rotating hinge (13). The inner layer of the inner top cover is hinged to the uppermost corner of the triangular block connecting arm via an upper pin (15).
3. The special vehicle hydraulic folding top cover according to claim 1 or 2, characterized in that: The front end face of the carriage (1) is provided with a reinforced connecting scale (6), and the bottom apex of the triangular block connecting arm is hinged to the reinforced connecting scale (6) via a lower pin (7).