An openable van cargo compartment roof cover device

Abstract

The utility model relates to the technical field of automobile cargo compartment, and relates to an openable compartment type cargo compartment roof cover device. It comprises: a winding assembly, a guide assembly and a roof assembly. The winding assembly is connected with the roof assembly, and the roof assembly is configured to be wound on the winding assembly or unwound from the winding assembly. The guide assembly is located on both sides of the roof assembly, and is used for guiding the winding or unwinding of the roof assembly. The roof assembly comprises a plurality of cover plates arranged side by side, and a flexible sealing strip is connected between each cover plate. The openable compartment type cargo compartment roof cover device breaks through the space limitation of the traditional fixed compartment type cargo compartment on the basis of meeting the height requirement of the transportation law, makes the same truck more flexible to cope with different sizes, especially different height of goods transportation task, improves the utilization rate and transportation efficiency of the vehicle, and at the same time, the smoothness of operation and the sealing and protection performance of the cargo compartment are ensured through the guide assembly and the flexible sealing design.

Description

Technical Field

[0001] This specification relates to the field of automotive cargo box technology, and in particular to an openable cargo box roof device. Background Technology

[0002] Currently, most mainstream enclosed freight trucks use a fixed roof design formed by welding sheet metal parts. This structure has mature technology, relatively controllable manufacturing costs, and provides good overall rigidity and sealing, meeting the transportation needs of conventional goods. However, its most significant structural limitation is that the roof of the truck cannot be opened at all. This design feature reveals obvious shortcomings when facing the increasing demand for transporting large and irregularly shaped goods in modern logistics: when the actual placement height of the goods to be transported exceeds the inherent net height of the truck's interior due to their shape or special loading requirements, the goods cannot be loaded into the truck at all due to the obstruction of the roof. This directly limits the vehicle's transportation capacity and scope of application, becoming a practical pain point that urgently needs to be addressed.

[0003] Therefore, current solutions include increasing the lateral space (width) of the cargo compartment. This is achieved through complex mechanical structures (such as sliding rails and folding panels) that expand the left and right side walls of the compartment outwards. While this does increase cargo volume, its fundamental limitation is that it only addresses the width issue, without increasing the vertical height of the compartment. Therefore, this solution is completely ineffective for the critical problem of goods that meet the height requirements of transport laws but exceed the height of the compartment's roof; oversized cargo remains blocked by the "ceiling" and cannot be loaded.

[0004] Another approach is the folding carriage method, which attempts to "open the ceiling." By designing a complex multi-component linkage mechanism involving multiple hinges, hydraulic or electric actuators, and locking devices, part or all of the carriage roof can be folded down or retracted, creating a temporary, larger loading opening at the top. This approach also has drawbacks: First, its structure is extremely complex, significantly increasing design, manufacturing, and maintenance costs; second, the presence of numerous moving parts significantly reduces the overall rigidity and reliability of the system, making it prone to failure or deformation under long-term use and harsh road conditions; third, the complex folding mechanism itself increases the vehicle's weight and may affect the carriage's sealing and insulation performance. These factors collectively result in high practicality and low overall cost-effectiveness of this approach.

[0005] Another method is to directly increase the height of the cargo box. While this method can directly increase the loading height, it will significantly increase the overall vehicle height, weight, wind resistance, and energy consumption, bringing a series of negative effects.

[0006] Therefore, this specification provides an openable cargo box top cover device. Summary of the Invention

[0007] This specification provides an openable cargo box top cover device to solve the problems existing in the prior art.

[0008] The following technical solution is adopted in this specification: An openable cargo box roof device, characterized in that it comprises: a winding assembly, a guiding assembly, and a roof assembly; The take-up assembly is connected to the roof assembly, and the roof assembly is configured to take up onto or unwind from the take-up assembly. The guide components are located on both sides of the top assembly, and the guide components are used to guide the winding or unwinding of the top assembly; The roof assembly includes multiple cover plates arranged side by side, with flexible sealing strips connecting each cover plate.

[0009] Based on the aforementioned technical means, through the cooperation of the retracting assembly and the roof assembly, the roof can be "rolled up" (retracted) or "unrolled" (unrolled) like a roller shutter. When loading oversized cargo (meeting the height requirements of the transport law), the roof assembly can be "retracted" from the retracting assembly, creating a hollowed-out top and increasing the vertical space inside the cargo compartment. When loading ordinary cargo, the roof can be "unrolled" back to the standard height of the cargo compartment, maintaining the vehicle's streamlined shape and low wind resistance. Furthermore, multiple side-by-side covers are connected by flexible sealing strips. When the retracting assembly retracts the roof assembly, the flexible sealing strips can elastically deform along with the adjacent covers, providing bending fulcrums for the adjacent covers and acting as a kind of rotation axis to facilitate retracting. When the roof is unfolded, the flexible sealing strips can fill the gaps between the covers, effectively preventing rainwater, dust, etc., from entering the cargo compartment and ensuring cargo safety. Therefore, this openable box-type cargo box top cover device, while meeting the height requirements of the Transport Law, breaks through the space limitations of traditional fixed box-type cargo boxes, enabling the same truck to more flexibly handle the transportation tasks of goods of different sizes (especially different heights), improving vehicle utilization and transportation efficiency. At the same time, the guide components and flexible sealing design ensure smooth operation and the sealing and protection performance of the cargo box.

[0010] Furthermore, at least some of the cover plates are fitted with rollers at both ends, the rollers being rotatably mounted on the guide assembly.

[0011] Based on the aforementioned technical means, by installing rollers at both ends of the cover plate and engaging them in rolling cooperation with the guide components (slide rails), the top assembly no longer experiences simple sliding friction during unwinding or rewinding, but rather rolling friction, significantly reducing motion resistance. This also makes the movement of the top assembly easier and smoother, reducing the risk of jamming, deviation, or seizing.

[0012] Furthermore, a C-shaped groove is formed on the guide component, and the roller is rotatably mounted in the C-shaped groove.

[0013] Based on the aforementioned technical means, the C-shaped groove provides a more precise rolling path, preventing the roller from derailing. The C-shaped groove limits the roller's vertical and horizontal movement, improving structural stability. The roller rolls within the C-shaped groove, resulting in more stable and easier movement.

[0014] Furthermore, a sealing strip is provided inside the C-shaped groove, the sealing strip being located between the C-shaped groove and the cover plate, and the sealing strip being used to seal the gap between the C-shaped groove and the cover plate.

[0015] Based on the above technical means, while maintaining the original functions, the overall sealing performance is further improved to prevent dust, rainwater and other substances from entering the slide groove, as well as to prevent foreign objects from entering, thereby extending the service life of the slide rail and rollers and reducing the maintenance frequency.

[0016] Furthermore, the winding assembly includes a spool, and the front end of the roof assembly is connected to the spool.

[0017] Using the aforementioned technical methods, the entire roof assembly can be orderly wound around its surface, saving space and avoiding messy tangling. After winding, the roof assembly is compactly stored at one end of the cargo box top, without affecting the overall vehicle outline or traffic safety. The reel can be easily connected to a motor, reducer, or manual crank, enabling electric or manual winding and unwinding.

[0018] Furthermore, the winding assembly also includes a drive gear, which is fixedly connected to the spool to drive the spool to rotate.

[0019] Based on the aforementioned technical means, the winding operation becomes controllable and adjustable. The gear structure is a stable power transmission method in mechanical transmission, facilitating connection with motors, reducers, hand cranks, etc. It enables electric control, remote control operation, automatic sensing for unwinding / winding, and other functions, enhancing the level of intelligence.

[0020] Furthermore, a bushing is provided between the drive gear and the reel.

[0021] Based on the aforementioned technical methods, the bushing, acting as a wear-resistant intermediate layer, effectively isolates direct friction between metals, significantly reducing the wear rate and extending the service life of the gears, reel, and the entire winding assembly. The bushing possesses excellent self-lubricating properties or a low coefficient of friction, making the reel rotate more smoothly and without obstruction under the drive of the gears. This reduces vibration and noise, improving operational comfort and system stability.

[0022] Furthermore, the winding assembly also includes a storage box, within which the reel is located, and the storage box is configured to store the roof assembly.

[0023] Using the aforementioned technical methods, the top assembly of the roll-up compartment is stored and protected after winding, preventing damage or wind resistance caused by exposure. The storage box is dustproof, waterproof, and protects against foreign objects, improving the system's weather resistance.

[0024] Furthermore, it also includes a detachable crossbeam located at the rear end of the top assembly, the detachable crossbeam being detachably mounted on the cargo box.

[0025] Based on the aforementioned technical means, the crossbeam adopts a detachable connection method (such as quick-release pins, buckles, magnetic attraction, etc.), which can be quickly installed when needed and quickly removed when not in use, making it convenient to load goods into the carriage.

[0026] Furthermore, the detachable crossbeam includes a beam body, with locking bolts at both ends of the beam body, and locking nuts threaded onto the locking bolts; the detachable crossbeam (4) is configured to be detachably fixed to the cargo box frame by the locking bolts and the locking nuts.

[0027] Based on the above technical means, the locking bolt + nut structure ensures that the connection between the crossbeam and the cargo box is firm and not easy to loosen.

[0028] The above-mentioned technical solutions adopted in this specification can achieve the following beneficial effects: Through the cooperation of the retractable assembly and the roof assembly, the roof can be "rolled up" (retracted) or "unrolled" (unrolled) like a roller shutter. When loading oversized cargo (meeting the height requirements of the transport law), the roof assembly can be "rolled up" and unfolded from the retractable assembly, creating a hollowed-out roof and increasing the vertical space inside the cargo compartment. When loading ordinary cargo, the roof can be "unrolled up" to restore the standard height of the cargo box, maintaining the vehicle's streamlined shape and low wind resistance. Furthermore, multiple side-by-side covers are connected by flexible sealing strips. When the retractable assembly retracts the roof assembly, the flexible sealing strips elastically deform along with the adjacent covers, providing bending fulcrums and acting as a kind of rotation axis to facilitate retracting. When the roof is unfolded, the flexible sealing strips fill the gaps between the covers, effectively preventing rainwater and dust from entering the cargo compartment and ensuring cargo safety. Therefore, this openable box-type cargo box top cover device, while meeting the height requirements of the Transport Law, breaks through the space limitations of traditional fixed box-type cargo boxes, enabling the same truck to more flexibly handle the transportation tasks of goods of different sizes (especially different heights), improving vehicle utilization and transportation efficiency. At the same time, the guide components and flexible sealing design ensure smooth operation and the sealing and protection performance of the cargo box. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and are used to explain this specification, but do not constitute an undue limitation thereof. In the drawings: Figure 1 This is an exploded structural diagram of an openable cargo box roof device according to the present invention. Figure 2 This is a first-view structural schematic diagram of an openable cargo box roof device according to the present invention. Figure 3 This is a second-view structural schematic diagram of an openable cargo box roof device according to the present invention. Figure 4 This is a third-view structural schematic diagram of an openable cargo box roof device according to the present invention. Figure 5 for Figure 4 A schematic diagram of the cargo box roof device with the guide components hidden, taken from the view shown; Figure 6 This is a schematic diagram of a C-shaped groove on a guide component according to the present invention; Figure 7 for Figure 6 A magnified view of a section at point A in the middle; Figure 8 This is a partial enlarged view of the C-shaped groove of this utility model; Figure 9 This is a first structural schematic diagram of the winding assembly in an openable box-type cargo box top cover device of this utility model; Figure 10 This is a schematic diagram of the second structure of the winding assembly in an openable cargo box top cover device of this utility model; Figure 11 for Figure 10 The first enlarged view of section B in the middle; Figure 12 for Figure 10 The second enlarged view of section B in the middle.

[0030] Figure label: 1-Rewinding assembly; 11-Spool; 12-Drive gear; 13-Bushing; 2-Guide assembly; 21-C-groove; 22-Sealing strip; 3-Top assembly; 31-Cover plate; 32-Flexible sealing strip; 33-Roller; 4-Removable crossbeam.

[0031] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without creative effort are within the scope of protection of this application.

[0033] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0036] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0037] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0038] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0039] Figure 1 This is an exploded structural diagram of an openable cargo box roof device provided in this specification. Figure 2 This is a first-view structural diagram of an openable cargo box roof device provided in this specification. Figure 3 This is a structural schematic diagram from a second perspective of an openable cargo box roof device. Figure 2 and Figure 3 As shown, the cargo box roof device includes a winding assembly 1, a guide assembly 2, and a roof assembly 3. The winding assembly 1 is connected to the roof assembly 3, and the roof assembly 3 is configured to be wound onto or unwound from the winding assembly 1. The guide assembly 2 is provided on both sides of the roof assembly 3 and is used to guide the winding or unwinding of the roof assembly 3. The roof assembly 3 includes multiple cover plates 31 arranged side-by-side, with flexible sealing strips 32 connecting each cover plate 31. The cover plates 31, when arranged, form the roof of the vehicle cargo box. Furthermore, the flexible sealing strips 32 in the roof assembly 3 can elastically deform as adjacent cover plates are wound, providing bending fulcrums for adjacent cover plates and acting as a rotation axis to facilitate winding.

[0040] Therefore, when the roof assembly 3 is not rolled up, it can be unfolded at the top of the cargo box to serve as the cargo box roof. If the cargo box is not high enough and the goods cannot be directly placed into the cargo box, the roof assembly 2, which serves as the cargo box roof, can be rolled up by the winding assembly 1, so that the roof area of ​​the cargo box roof no longer obstructs the placement of goods into the cargo box for transportation. On the other hand, after the goods have been transported, the roof assembly 3 can be unrolled (i.e., unfolded) onto the cargo box roof by the winding assembly 1.

[0041] based on Figure 1The illustrated openable cargo box roof device allows the roof to be "rolled up" (retracted) or "unrolled" (unrolled) like a roller shutter, through the cooperation of a retracting assembly and a roof assembly. When loading oversized cargo (meeting height requirements under transport regulations), the roof assembly can be "rolled up" and unrolled from the retracting assembly, creating a hollowed-out roof and increasing the vertical space inside the cargo box. When loading ordinary cargo, the roof can be "unrolled" back to the standard cargo box height, maintaining the vehicle's streamlined shape and low wind resistance. Furthermore, multiple side-by-side covers are connected by flexible sealing strips. When the retracting assembly retracts the roof assembly, the flexible sealing strips elastically deform along with the adjacent covers, providing bending fulcrums and acting as a kind of rotation axis to facilitate retracting. When the roof is unfolded, the flexible sealing strips fill the gaps between the covers, effectively preventing rainwater and dust from entering the cargo box and ensuring cargo safety. Therefore, this openable box-type cargo box top cover device, while meeting the height requirements of the Transport Law, breaks through the space limitations of traditional fixed box-type cargo boxes, enabling the same truck to more flexibly handle the transportation tasks of goods of different sizes (especially different heights), improving vehicle utilization and transportation efficiency. At the same time, the guide components and flexible sealing design ensure smooth operation and the sealing and protection performance of the cargo box.

[0042] In one or more embodiments of this specification, Figure 4 This is a third-view structural diagram of an openable cargo box roof device. Figure 5 for Figure 4 The diagram shown illustrates the cargo box roof assembly from a perspective where the guide components are concealed. Figure 4 and Figure 5 As shown, at least one end of the cover plate 31 in the openable box-type cargo box top cover device is equipped with rollers 33. The rollers 33 are mounted on the guide assembly 2 so that the top cover assembly 3 can be wound up or unwound through the guide assembly 2. The rollers 33 can be formed on the roller mounting structure, one end of the roller mounting structure is adapted to the cover plate 31, and the roller mounting structure can be fixed to both ends of the cover plate 31, so that the rollers 33 and the cover plate 31 can be easily connected.

[0043] By installing rollers at both ends of the cover plate and engaging them in rolling contact with the guide components (slide rails), the top assembly of the car is no longer subject to simple sliding friction but rather rolling friction during unwinding or rewinding, significantly reducing movement resistance. This also makes the movement of the top assembly easier and smoother, reducing the risk of jamming, deviation, or seizing.

[0044] Furthermore, Figure 6 This is a schematic diagram of the C-shaped groove on the guide assembly. Figure 7 for Figure 6 A magnified view of a portion of point A in the middle. (See image below.) Figure 6 and Figure 7As shown, a C-shaped groove 21 is formed on the guide assembly 2. The roller 33 is rolled within the C-shaped groove 21, providing support for the cover plate 31 and reducing resistance during the winding or unwinding process. The C-shaped groove provides a more precise rolling path, preventing the roller from derailing. The C-shaped groove also limits the roller's vertical and horizontal movement, improving structural stability. The roller's movement within the C-shaped groove is more stable and easier.

[0045] Furthermore, such as Figure 8 The enlarged view of the C-shaped slide groove shown shows that a sealing strip 22 can also be provided inside the C-shaped slide groove 21. The sealing strip 22 is located between the C-shaped slide groove 21 and the cover plate 31. The sealing strip 22 is used to seal the gap between the C-shaped slide groove 21 and the cover plate 31, further improving the overall sealing performance, preventing dust, rainwater and other substances from entering the slide groove, preventing foreign objects from entering, extending the service life of the slide rail and rollers, and reducing the maintenance frequency.

[0046] In one or more embodiments of this specification, Figure 9 This is a schematic diagram of the first structure of a winding assembly in an openable van-type cargo box roof device. Figure 9 As shown, the winding assembly 1 includes a reel 11, and the front end of the cargo box roof assembly 3 is connected to the reel 11. The front end of the cargo box roof assembly 3 refers to the front end of the vehicle's cargo box roof, which is near the front of the vehicle and is therefore called the front end. By using the reel 11, the entire cargo box roof assembly can be orderly wound around its surface, saving space and avoiding messy tangling. After winding, the cargo box roof assembly is compactly stored at one end of the cargo box roof, without affecting the overall outline of the vehicle or traffic safety. The reel can be easily connected to a motor, reducer, or manual crank, etc., to achieve electric or manual winding and unwinding.

[0047] Furthermore, Figure 10 This is a schematic diagram of the second structure of a winding assembly in an openable van-type cargo box roof device. Figure 10As shown, the winding assembly 1 also includes a drive gear 12, which is fixedly connected to the winding shaft 11 and used to drive the winding shaft 11 to rotate. During the rotation of the winding shaft 11 driven by the drive gear 12, the top assembly 3 can be wound onto the winding shaft 11. The flexible sealing strip 32 in the top assembly 3 can deform during the winding process, that is, it can undergo elastic deformation as the adjacent cover plates are wound, providing a bending fulcrum for the adjacent cover plates, acting as a similar rotation axis to facilitate winding. Conversely, reversing the rotation direction of the drive gear 12 allows the top assembly 3 wound on the winding shaft 11 to be unwound. It is worth noting that the drive gear 12 makes the winding operation controllable and adjustable. Gear structures are a stable power transmission method in mechanical transmission. The drive gear 12 can be connected to a motor, reducer, hand crank, etc., to realize electric control, remote control operation, automatic sensing unfolding / winding, and other functions, improving the level of intelligence. Therefore, the winding assembly can be configured to connect to the vehicle's power supply to obtain power energy, and the driver can control the winding or unwinding of the roof assembly through control buttons inside the cab.

[0048] Furthermore, such as Figure 11 and Figure 12 As shown, Figure 11 for Figure 10 The first enlarged view of section B in the middle. Figure 12 for Figure 10 The second enlarged view at point B shows that a bushing 13 may also be provided between the drive gear 12 and the reel 11. Using the bushing as a wear-resistant intermediate layer effectively isolates direct metal-to-metal friction, significantly reducing the wear rate and extending the service life of the gear, reel, and the entire winding assembly. The bushing has good self-lubricating properties or a low coefficient of friction, making the reel rotate more smoothly and without obstruction under the drive of the gear. This reduces vibration and noise, improving operational comfort and system stability.

[0049] In this specification, the rewind assembly 1 also includes a storage box, within which the reel 11 is located. When the roof assembly 3 is wound onto the reel 11, the storage box can store the roof assembly 3. Therefore, the storage box is configured to store the roof assembly 3. After winding, the roof assembly is protected, preventing damage or wind resistance caused by exposure. The storage box is dustproof, waterproof, and protects against foreign objects, improving the system's weather resistance.

[0050] In one or more embodiments of this specification, the openable cargo box roof device further includes a detachable crossbeam 4, which is located at the rear end of the roof assembly 3 and is used for detachable installation on the cargo box. The rear end of the roof assembly 3 refers to the rear end of the vehicle's cargo box roof, which is located near the rear of the vehicle and is therefore called the rear end.

[0051] Furthermore, the detachable crossbeam 4 may include a beam body, with locking bolts at both ends of the beam body, and locking nuts threaded onto the locking bolts. Therefore, the detachable crossbeam 4 can be configured to be detachably fixed to the cargo box frame by means of locking bolts and locking nuts, that is, locking bolts are welded to both ends of the beam body of the detachable crossbeam to fix the detachable crossbeam 4 to the cargo box frame by means of locking nuts.

[0052] Of course, the crossbeams can also use other detachable connection methods (such as quick-release pins, buckles, magnetic closures, etc.), which can be quickly installed when needed and quickly removed when not in use, making it easier to load goods into the carriage.

[0053] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. An openable cargo box top cover device, characterized in that, include: Rewinding assembly (1), guiding assembly (2) and roof assembly (3); The winding assembly (1) is connected to the top assembly (3), and the top assembly (3) is configured to be able to wind up onto the winding assembly (1) or unwind from the winding assembly (1); The guide component (2) is located on both sides of the top component (3), and the guide component (2) is used to guide the winding or unwinding of the top component (3); The roof assembly (3) includes a plurality of cover plates (31) arranged side by side, and each cover plate (31) is connected by a flexible sealing strip (32).

2. The openable cargo box top cover device as described in claim 1, characterized in that, At least some of the cover plate (31) has rollers (33) installed at both ends, and the rollers (33) are rolled on the guide assembly (2).

3. The openable cargo box top cover device as described in claim 2, characterized in that, A C-shaped groove (21) is formed on the guide component (2), and the roller (33) is rotatably installed in the C-shaped groove (21).

4. The openable cargo box top cover device as described in claim 3, characterized in that, The C-shaped groove (21) is provided with a sealing strip (22), which is located between the C-shaped groove (21) and the cover plate (31). The sealing strip (22) is used to seal the gap between the C-shaped groove (21) and the cover plate (31).

5. An openable cargo box roof device as described in any one of claims 1-4, characterized in that, The winding assembly (1) includes a spool (11), and the front end of the top assembly (3) is connected to the spool (11).

6. The openable cargo box top cover device as described in claim 5, characterized in that, The winding assembly (1) further includes a drive gear (12), which is fixedly connected to the spool (11) to drive the spool (11) to rotate.

7. The openable cargo box top cover device as described in claim 6, characterized in that, A bushing (13) is provided between the drive gear (12) and the reel (11).

8. The openable cargo box top cover device as described in claim 1, characterized in that, It also includes a detachable crossbeam (4) located at the rear end of the top assembly (3) and is designed for detachable installation on the cargo box.

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