A monorail support structure for a tonneau cover

Abstract

The utility model discloses a single -rail support structure of compartment cover, including single -layer lateral rail, compartment cover spare, locking connection mechanism and first, second sealing piece. Single -layer lateral rail has horizontal support surface and vertical support surface, respectively clings to carriage wall side wall and leans on its upper end face, compartment cover spare can switch between opening and closing state, and is locked and is connected with single -layer lateral rail through locking connection mechanism. First sealing piece is located at horizontal support surface, and is tightly formed seal with both when compartment cover is closed, second sealing piece is located at compartment cover side along and outside expansion forms drainage portion, makes single -layer lateral rail to be located in the inside. The structure replaces traditional multitrack with single -layer lateral rail, reduces spare parts, reduces weight and manufacturing cost, and simplifies installation, and double -sealed design blocks rainwater infiltration, and cooperates with the inclined drainage of guide rib, avoids waterlogging corrosion, and improves the service life.

Description

Technical Field

[0001] This utility model relates to a cover support device for a carriage, and more particularly to a single-rail cover support structure that is simplified in structure, reliable in sealing, and has a multi-position state switching function. Background Technology

[0002] In the freight and special transport sector, the cargo box cover is a key component that protects goods from the external environment (such as rain, dust, and sun). The rationality of its support structure directly affects the ease of operation, sealing performance, and service life of the cargo box cover.

[0003] Example 1 of the prior art, referring to patent document CN209870225U, discloses a cover locking device, a cargo box, and a freight car. It includes: a side rail; a latch structure detachably mounted on the side rail, the latch structure including a limiting surface; and a latch assembly disposed on the cover, the latch assembly including a plunger that can at least partially move below the limiting surface, the limiting surface extending towards the plunger and the extension length of the limiting surface not less than the length by which the plunger moves below the limiting surface. The detachable latch structure on the side rail, in conjunction with the latch assembly on the cover, can lock the cover onto the side rail without collision or damage to the side rail; further, by setting the extension length of the limiting surface not less than the length by which the plunger moves below the limiting surface, it can prevent the plunger structure from colliding with the inner side of the latch structure. This solves the problem in the prior art where the latch assembly easily collidees with and damages the side rail after long-term use of the cover assembly.

[0004] Example 2 of the prior art, referring to patent document CN111891029B, discloses a vehicle body cover system, including: a cover component, the upper end of which is closed and has a connecting member inside for fixing it; a support component, including a first support member and a second support member, the first support member and the second support member being detachably connected, the first support member including a support surface and a drainage channel, the second support member including a retaining surface and a bearing surface; a fastening component, the fastening component being connected to the connecting member; a sealing component, the upper end of which abuts against the lower end of the cover component; and a drainage component, including a transition channel and a drainage pipe disposed on the transition channel, the drainage pipe being connected to the outside. This vehicle body cover system is internally detachable without requiring complete replacement, and can be adapted to different vehicle body models. It also has a drainage function, and the closed upper end of the cover component prevents moisture from entering the vehicle body. Simultaneously, the flexible contact with the vehicle body cover ensures stable contact, reduces wear on the vehicle body cover, prevents rainwater infiltration, and prevents abnormal noises during driving.

[0005] In summary, the existing support structures for truck bed covers generally suffer from the following problems: 1. Complex support rail structure: Most covers use a double-rail or multi-rail support design, which not only increases the overall weight of the truck bed but also increases the difficulty of installation and manufacturing costs. Furthermore, the high precision required for the fit between multiple rails makes them prone to jamming or wear over long-term use. 2. Insufficient sealing performance: Existing structures often use single-piece seals with large gaps between the seals and the support rails. Rainwater can easily seep into the truck bed from the connection between the cover and the support rails, causing moisture damage to the cargo. Additionally, some structures lack dedicated drainage designs, allowing water to accumulate near the support rails and accelerating component corrosion. 3. Low locking and support reliability: Traditional locking mechanisms are mostly manual plug-in or snap-on types, which are cumbersome to operate and have poor locking stability, making them prone to loosening during vehicle operation. Moreover, once the cover is open, it usually lacks a stable support mechanism, or the support mechanism is inconvenient to store, taking up extra space and easily lost. 4. Limited positional functionality: Existing covers mostly only have "open" and "close" functions. The two states cannot meet the "standing support" requirements in special scenarios (such as when personnel need to work on the side of the carriage), and lack flexibility.

[0006] In view of the shortcomings of the existing technology, there is an urgent need for a box cover support structure that is simplified in structure, reliable in sealing, convenient in operation and has multiple position states, so as to solve the problems existing in the existing technology. Summary of the Invention

[0007] In order to overcome the above-mentioned shortcomings of the prior art, this utility model provides a single rail support structure for the box cover, which can simplify the support rail structure, reduce weight and installation difficulty, and at the same time ensure support stability.

[0008] The technical solution of this utility model to solve its technical problem is: a single-rail support structure for a car cover, comprising: A single-layer side rail has a horizontal support surface and a vertical support surface. The vertical support surface abuts against the upper end surface of the carriage wall, and the horizontal support surface abuts against the side wall of the carriage wall. A cover component is used to cover the cargo compartment, and the cover component has at least an open position and a closed position relative to the cargo compartment; when the cover component is in the closed position, the cover component abuts against the horizontal support surface; when the cover component is in the open position, the cover component separates from the horizontal support surface. A locking connection mechanism is provided, through which the cover component can be locked to a single-layer side rail; A first sealing element is disposed on the horizontal support surface; when the cover component is in the open position, the first sealing element abuts against the cover component and the horizontal support surface respectively, so that a sealing fit is formed between the cover component and the horizontal support surface. The second seal is disposed on the side edge of the cover component, and the second seal extends outward to form a drainage section, such that the single-layer side rail is located entirely inside the drainage section.

[0009] In some preferred embodiments of this utility model, a first groove is provided on the horizontal support surface, and the first sealing member is embedded in the first groove; The first sealing element has several sealing ribs protruding upwards, the sealing ribs extending out of the first groove, and the cover component can abut against the sealing ribs.

[0010] In some preferred embodiments of the present invention, a second groove is provided on the side edge of the cover component, the second sealing member is at least partially embedded in the second groove, and the drainage part extends out of the second groove; The drainage section has several guide ribs that gradually slope downwards from the inside to the outside, and the guide ribs are located on the outside of the single-layer side rail.

[0011] In some preferred embodiments of this utility model, the locking connection mechanism includes an active telescopic latch assembly and a fixed latch seat; The active telescopic latch assembly is disposed at the lower end of the cover component, and the fixed latch seat is disposed on the vertical support surface. When the active telescopic latch assembly extends, it can abut against the fixed latch seat and form a limiting locking engagement, so that the cover assembly cannot switch from the closed position to the open position. When the active telescopic latch assembly retracts, it can separate from the fixed latch seat and engage in locking engagement, allowing the hatch assembly to freely switch between the closed and open positions.

[0012] In some preferred embodiments of this utility model, the fixed latch seat includes a metal latch seat body and a latch seat plastic sheath; The plastic sheath of the latch seat covers the front and rear sides of the metal latch seat body; The inner side of the vertical support surface has a first toothed surface, and the outer sides of the metal latch seat body and the latch seat plastic sheath both have a second toothed surface. The second toothed surface can engage with the first toothed surface and hold each other in place. The metal latch seat body is fixed to the vertical support surface by a first fastener.

[0013] In some preferred embodiments of this utility model, a side rail plastic sheath is also included, which covers the rear edge of the single-layer side rail.

[0014] In some preferred embodiments of the present invention, the cover component includes a plurality of transverse frames, a longitudinal frame and a cover body, wherein the transverse frames and the longitudinal frames are at least partially able to abut against a horizontal support surface, the transverse side of the cover body is connected to the transverse frame, and the longitudinal side of the cover body is connected to the longitudinal frame.

[0015] In some preferred embodiments of this utility model, the covering body includes a basic cover and multiple flip-up covers; The active telescopic latch assembly is configured on the flip-up cover; The base cover is connected to the vertical support surface via a clamping mechanism; The clamping mechanism includes a clamp bracket and a clamp body. The clamp body is disposed on the base cover. The clamp bracket is fixed to the vertical support surface by a fifth fastener. The clamp bracket is detachably connected to the clamp holder so that the clamp bracket and the clamp body form a limiting and locking engagement.

[0016] In some preferred embodiments of this utility model, the cover component is in a standing position relative to the carriage, and a support mechanism is provided between the cover component and the single-layer side rail. The support mechanism can act on the cover component to keep the cover component in a standing position. The support mechanism includes a strut, a first strut seat, a second strut seat, and a storage base; The first strut seat is fixed to the vertical support surface by the second fastener, and one end of the strut is rotatably connected to the first strut seat; The second strut seat is fixed to the cover component by a third fastener, and the other end of the strut is detachably connected to the second strut seat; The storage base includes a metal connecting base and a plastic storage base. The metal connecting base is fixed to the vertical support surface by a fourth fastener, and the plastic storage base is fixed to the metal connecting base by a fifth fastener. The plastic storage base has a storage groove for accommodating the support rod, the storage groove having an inlet and outlet opening, and the width of the narrowest part of the inlet and outlet opening being less than the radial dimension of the support rod.

[0017] The operation method of this utility model is as follows: Closing the hatch cover: Flip the hatch cover component downwards, and the sealing rib deforms under pressure; activate the active telescopic latch assembly, and the latch extends and abuts against the fixed latch seat; the clamp body engages with the clamp bracket to complete the closing and locking process; Open the hatch: retract the active telescopic latch assembly to unlock; flip the hatch assembly upwards to separate it from the horizontal support surface; if temporary fixation is required, the support rod can be removed from the storage base; Switch to standing position: Flip the lid component to the upright position, and insert the free end of the support rod into the second support rod seat. At this time, the support rod is in a stretched state, and the lid remains upright. When not in use, remove the support rod from the second support rod seat and insert it into the storage slot through the inlet and outlet opening of the storage seat.

[0018] The beneficial effects of this utility model are as follows: I. Simplified structure and lightweight: The single-layer side rail replaces the traditional multi-rail structure, reducing the number of parts and the overall weight, while simplifying the installation steps and reducing manufacturing costs. 2. Reliable sealing and strong waterproof performance: The double sealing design can effectively prevent rainwater from seeping in; the inclined design of the guide ribs accelerates drainage, avoids water accumulation and corrosion of parts, and extends the service life of the structure. 3. Convenient operation and multiple states: The locking mechanism adopts an active telescopic locking tongue, which can quickly lock and unlock; the support mechanism, together with the storage base, not only provides stable support for the standing position, but also allows for convenient storage of the support rod without taking up extra space. IV. High stability and low wear: Plastic sleeves (side rail plastic sleeves, lock tongue seat plastic sleeves) reduce collision and wear between metal parts and reduce operating noise; toothed surface fit improves the fixing stability of the lock tongue seat and the support surface and avoids loosening. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the utility model in the closed position.

[0020] Figure 2 This is a schematic diagram of the present invention in a standing position.

[0021] Figure 3 This is a schematic diagram of the utility model in the open position.

[0022] Figure 4 This is a partial structural disassembly diagram of this utility model.

[0023] Figure 5 This is a partial structural diagram of the locking connection mechanism.

[0024] Figure 6 This is a partial structural diagram of the clamping mechanism.

[0025] Figure 7 This is a partial structural diagram of the strut.

[0026] Figure 8 This is a structural diagram of the storage base.

[0027] Figure 9 This is a partial schematic diagram of a single-sided side rail in use.

[0028] In the diagram: 1. Single-layer side rail; 11. Horizontal support surface; 111. First groove; 12. Vertical support surface; 121. First toothed surface; 13. Side rail plastic sleeve; 2. Carriage wall; 21. Upper end face of carriage wall; 22. Side wall of carriage wall; 3. Cover component; 3a. Open position; 3b. Closed position; 3c. Standing position; 31. Horizontal frame; 32. Longitudinal frame; 33. Cover body; 331. Basic cover; 332. Flip-up cover; 34. Second groove; 4. Locking connection mechanism; 41. Active telescopic mechanism 42. Locking tongue assembly; 421. Fixed locking tongue seat; 422. Metal locking tongue seat body; 423. Locking tongue seat plastic sleeve; 424. Second toothed surface; 5. First sealing element; 51. Sealing rib; 52. Positioning gap; 6. Second sealing element; 61. Drainage part; 611. Guide rib; 7. Clamping mechanism; 71. Clamping bracket; 72. Clamping body; 81. Support rod; 82. First support rod seat; 83. Second support rod seat; 84. Storage seat; 841. Metal connecting seat; 842. Plastic storage seat; 843. Storage groove; 844. Inlet / outlet opening. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Example 1 Reference Figures 1-9A monorail support structure for a carriage cover includes: a single-layer side rail 1 having a horizontal support surface 11 and a vertical support surface 12, wherein the vertical support surface 12 abuts against the upper end face of the carriage wall 2, and the horizontal support surface 11 abuts against the side wall of the carriage wall 2; a carriage cover component 3 for covering the carriage, and the carriage cover component 3 having at least an open position state 3a and a closed position state 3b relative to the carriage; when the carriage cover component 3 is in the closed position state 3b, the carriage cover component 3 abuts against the horizontal support surface 11; when the carriage cover component 3 is in the open position state 3a, the carriage cover component 3 and the horizontal support surface 11 are in contact. Separation; locking connection mechanism 4, the cover component 3 can be locked to the single-layer side rail 1 through the locking connection mechanism 4; first sealing member 5, which is disposed on the horizontal support surface 11; when the cover component 3 is in the open position 3a, the first sealing member 5 abuts against the cover component 3 and the horizontal support surface 11 respectively, so that a sealing fit is formed between the cover component 3 and the horizontal support surface 11; second sealing member 6, which is disposed on the side edge of the cover component 3, and the second sealing member 6 unfolds outward to form a drainage part 61, so that the single-layer side rail 1 is located inside the drainage part 61.

[0033] Reference Figure 3 , Figure 9 In this embodiment, the single-layer side rail 1 is preferably integrally formed, providing structural support between the cover component 3 and the carriage wall 2. The horizontal support surface 11 and the vertical support surface 12 form an L-shaped composite load-bearing structure, replacing the traditional structure of multiple side rails stacked together. Among them, the horizontal support surface 11 (abutting the carriage side wall) mainly bears the vertical load when the cover is closed, dispersing the pressure through surface contact with the carriage side wall; the vertical support surface 12 (abutting the upper surface of the carriage wall 2) provides lateral restraint, preventing the cover from lateral displacement during vehicle vibration, and at the same time forming an anti-overturning moment through line contact with the top of the carriage.

[0034] This embodiment adopts a dual sealing system consisting of a first sealing element 5 and a second sealing element 6, which serves as a dual barrier for drainage and protection of the cover component 3. It effectively replaces the structural scheme of the side rail drainage groove, making the overall structure simpler and forming the advantages of lightweight and modularity.

[0035] Reference Figure 9The preferred installation structure of the first sealing element 5 is as follows: a first groove 111 is provided on the horizontal support surface 11, and the first sealing element 5 is embedded in the first groove 111. The preferred structure of the first sealing element 5 is as follows: the first sealing element 5 has several upwardly protruding sealing ribs 51, the sealing ribs 51 extending outside the first groove 111, and the cover component 3 can abut against the sealing ribs 51. Multiple sealing ribs 51 form redundant seals, improving reliability. Even if a small gap appears in one sealing rib 51 due to wear or deformation, the other sealing ribs 51 can still maintain a seal, avoiding the problem of single-point failure leading to overall seal collapse. At the same time, the sealing ribs 51 can increase local pressure and enhance sealing strength.

[0036] Reference Figure 9 The preferred installation structure of the second seal 6 is as follows: a second groove 34 is provided on the side edge of the cover component 3, and the second seal 6 is at least partially embedded in the second groove 34, with the drainage part 61 extending out of the second groove 34. The preferred structure of the second seal 6 is as follows: the drainage part 61 has several guide ribs 611 that gradually slope downwards from the inside to the outside. The guide ribs 611 can directionally guide rainwater away from the side rails and the carriage. The guide ribs 611 are located on the outside of the single-layer side rail 1, achieving a larger area of ​​shielding effect and preventing rainwater from entering the carriage interior.

[0037] Example 2 Reference Figure 5 , Figure 7 , Figure 9 In this preferred embodiment, the locking connection mechanism 4 includes an active telescopic latch assembly 41 and a fixed latch seat 42; the active telescopic latch assembly 41 is disposed at the lower end of the cover component 3, and the fixed latch seat 42 is disposed on the vertical support surface 12.

[0038] The working principle of the locking connection mechanism 4 is as follows: When the active telescopic latch assembly 41 extends, the active telescopic latch assembly 41 can abut against the fixed latch seat 42 and form a limiting locking engagement, so that the cover component 3 cannot switch from the closed position state 3b to the open position state 3a. When the active telescopic latch assembly 41 retracts, it can separate from the fixed latch seat 42 and engage in locking engagement, so that the cover component 3 can freely switch between the closed position state 3b and the open position state 3a.

[0039] Example 3 Reference Figure 5In this embodiment, the fixed latch seat 42 includes a metal latch seat body 421 and a latch seat plastic sleeve 422. The metal latch seat body 421 is the rigid frame of the fixed latch seat 42, and its main function is to directly bear the locking impact force of the active telescopic latch assembly 41. The latch seat plastic sleeve 422 covers the front and rear edges of the metal latch seat body 421, serving multiple functions such as preventing abnormal noise and wear, buffering impact, and preventing cuts.

[0040] On the other hand, refer to Figure 5 The vertical support surface 12 has a first toothed surface 121 on its inner side, and the metal latch seat body 421 and the latch seat plastic sleeve 422 both have a second toothed surface 423 on their outer sides. The second toothed surface 423 can engage with the first toothed surface 121 and hold each other in place. The metal latch seat body 421 is fixed to the vertical support surface 12 by a first fastener. This achieves precise positioning of the two components. Even if long-term vehicle vibration causes slight loosening of the first fastener during use, the toothed engagement can still prevent the latch seat from shifting, ensuring that the locking position does not deviate.

[0041] Preferably, refer to Figure 4 The system also includes a side rail plastic sleeve 13, which covers the rear edge of the single-layer side rail 1. The core function of the side rail plastic sleeve 13 is to solve the inherent problems of metal side rails through flexible covering. Specifically, firstly, it prevents scratches: the single-layer side rail 1 is mostly made of metal, and if its rear edge is not treated, it is easy to form sharp edges, which may scratch the operator's hands or scratch soft goods in the compartment when installing the cover, loading and unloading goods or maintenance; the side rail plastic sleeve 13 covers the edge in a full or half-covering manner, turning the sharp edges into a rounded and flexible contact surface, completely eliminating the risk of scratches. At the same time, the surface of the sleeve can be treated with anti-slip texture, which can also improve the grip comfort when manually adjusting the cover. Secondly, it prevents corrosion: the rear edge of the single-layer side rail 1 is prone to accumulating dust and moisture, and long-term exposure can easily lead to rust or aging. The side rail plastic sleeve 13 can form a physical barrier to isolate the edge from direct contact with the external environment. The plastic sheath 13 on the side rails prevents moisture from seeping into the interior of the side rails through edge gaps, slowing down the rate of corrosion. Thirdly, it provides cushioning and shock absorption: during the opening and closing of the compartment cover, if vibration causes a slight collision between the cover component 3 and the rear edge of the single-layer side rail 1, the metal-to-metal contact can easily produce a clicking noise. The flexible nature of the plastic sheath 13 can cushion the impact force and absorb vibration energy through its own deformation, completely eliminating such noises and improving the user experience.

[0042] Example 4 Reference Figures 1-3In some preferred embodiments of this utility model, the cover component 3 includes a plurality of transverse frames 31, longitudinal frames 32, and a cover body 33. The transverse frames 31 and longitudinal frames 32 are at least partially abutting against the horizontal support surface 11. The transverse sides of the cover body 33 are connected to the transverse frames 31, and the longitudinal sides of the cover body 33 are connected to the longitudinal frames 32. This forms a modular design, where the number of transverse frames 31, longitudinal frames 32, and cover bodies 33 is not limited and can be customized and combined according to requirements to meet the needs of vehicles of different sizes.

[0043] Among them, reference Figure 6 The covering body 33 includes a base cover 331 and multiple flip-up covers 332; the active telescopic locking tongue assembly 41 is configured on the flip-up covers 332; the base cover 331 is connected to the vertical support surface 12 via a clamping mechanism 7; the clamping mechanism 7 includes a clamp bracket 71 and a clamp body 72, the clamp body 72 is configured on the base cover 331, and the clamp bracket 71 is fixed to the vertical support surface 12 by a fifth fastener; the clamp bracket 71 is detachably connected to the clamp body 72 so that the clamp bracket 71 and the clamp body 72 form a limiting locking engagement. The base cover 331 serves as the fixed reference for the compartment cover and is fixed during use; the flip-up covers 332 can be unlocked or locked during use, releasing a certain amount of compartment space for easy loading and unloading of goods; when fully closed, they provide effective protection for the interior of the compartment.

[0044] Furthermore, referring to Figure 2 The cover component 3 also has a standing position 3c relative to the carriage. A support mechanism is provided between the cover component 3 and the single-layer side rail 1. The support mechanism can act on the cover component 3 to keep the cover component 3 in the standing position 3c. The support mechanism includes a support rod 81, a first support rod 81 seat, a second support rod 81 seat, and a storage seat 84. The first support rod 81 seat is fixed to the vertical support surface 12 by a second fastener, and one end of the support rod 81 is rotatably connected to the first support rod 81 seat. The second support rod 81 seat is fixed to the cover component 3 by a third fastener, and the other end of the support rod 81 is detachably connected to the second support rod 81 seat. Through the action of the support mechanism, the cover component 3 can switch between the standing position 3c, the open position 3a, and the closed position 3b. Each position can meet the different daily needs of users.

[0045] It is worth mentioning that, referring to Figure 8The storage base 84 includes a metal connecting base 841 and a plastic storage base 84 body. The metal connecting base 841 is fixed to the vertical support surface 12 by a fourth fastener, and the plastic storage base 84 body is fixed to the metal connecting base 841 by a fifth fastener. The plastic storage base 84 body has a storage groove 843 for accommodating the support rod 81. The storage groove 843 has an inlet / outlet opening 844, and the width of the narrowest part of the inlet / outlet opening 844 is smaller than the radial dimension of the support rod 81. The metal connecting base 841 serves as a fixed anchor point to ensure stable installation; the plastic storage base 84 body provides flexible accommodating space, directly contacting the support rod 81, utilizing the elastic deformation of the plastic to achieve the effect of opening when inserted and clamping after insertion.

[0046] In this utility model, each fastener (first fastener, second fastener, third fastener, fourth fastener, fifth fastener) is preferably made of screws, bolts or rivets or other components.

[0047] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A single-rail support structure for a box cover, characterized in that: Including: A single-layer side rail (1) has a horizontal support surface (11) and a vertical support surface (12), wherein the vertical support surface (12) abuts against the upper end surface of the car wall (2), and the horizontal support surface (11) abuts against the side wall of the car wall (2). The cover component (3) is used to cover the carriage, and the cover component (3) has at least an open position (3a) and a closed position (3b) relative to the carriage; when the cover component (3) is in the closed position (3b), the cover component (3) abuts against the horizontal support surface (11); when the cover component (3) is in the open position (3a), the cover component (3) separates from the horizontal support surface (11); Locking connection mechanism (4), the cover component (3) can be locked to the single-layer side rail (1) through the locking connection mechanism (4); The first sealing element (5) is disposed on the horizontal support surface (11); when the cover component (3) is in the open position (3a), the first sealing element (5) abuts against the cover component (3) and the horizontal support surface (11) respectively, so that a sealing fit is formed between the cover component (3) and the horizontal support surface (11). A second seal (6) is disposed on the side edge of the cover component (3), and the second seal (6) extends outward to form a drainage section (61) such that the single-layer side rail (1) is entirely located inside the drainage section (61).

2. The monorail support structure for the box cover according to claim 1, characterized in that: A first groove (111) is provided on the horizontal support surface (11), and the first sealing member (5) is embedded in the first groove (111); The first sealing element (5) has several sealing ribs (51) protruding upwards. The sealing ribs (51) extend out of the first groove (111), and the cover component (3) can abut against the sealing ribs (51).

3. The monorail support structure for the box cover according to claim 1, characterized in that: The side edge of the cover component (3) is provided with a second groove (34), the second sealing member (6) is at least partially embedded in the second groove (34), and the drainage part (61) extends out of the second groove (34); The drainage section (61) has several guide ribs (611) that gradually slope downward from the inside to the outside, and the guide ribs (611) are located on the outside of the single-layer side rail (1).

4. The monorail support structure for the box cover according to claim 1, characterized in that: The locking connection mechanism (4) includes an active telescopic latch assembly (41) and a fixed latch seat (42); The active telescopic latch assembly (41) is disposed at the lower end of the cover component (3), and the fixed latch seat (42) is disposed on the vertical support surface (12). When the active telescopic latch assembly (41) extends, the active telescopic latch assembly (41) can abut against the fixed latch seat (42) and form a limiting locking engagement, so that the cover component (3) cannot switch from the closed position state (3b) to the open position state (3a). When the active telescopic latch assembly (41) retracts, the active telescopic latch assembly (41) can separate from the fixed latch seat (42) and engage in locking engagement, so that the cover component (3) can freely switch between the closed position state (3b) and the open position state (3a).

5. The monorail support structure for the box cover according to claim 4, characterized in that: The fixed latch seat (42) includes a metal latch seat body (421) and a latch seat plastic sheath (422); The plastic sheath (422) of the latch seat covers the front and rear sides of the metal latch seat body (421); The inner side of the vertical support surface (12) has a first toothed surface (121), and the outer sides of the metal latch seat body (421) and the latch seat plastic sheath (422) both have a second toothed surface (423). The second toothed surface (423) can engage with the first toothed surface (121) and hold each other in place. The metal latch body (421) is fixed to the vertical support surface (12) by the first fastener.

6. The monorail support structure for the box cover according to claim 1, characterized in that: It also includes a side rail plastic sleeve (13), which covers the rear edge of the single-layer side rail (1).

7. The monorail support structure for the box cover according to claim 4, characterized in that: The cover component (3) includes several transverse frames (31), longitudinal frames (32) and a cover body (33). The transverse frames (31) and longitudinal frames (32) are at least partially able to abut against the horizontal support surface (11). The transverse side of the cover body (33) is connected to the transverse frame (31), and the longitudinal side of the cover body (33) is connected to the longitudinal frame (32).

8. The monorail support structure for the box cover according to claim 7, characterized in that: The covering body (33) includes a basic cover (331) and multiple flip-up covers (332); The active telescopic latch assembly (41) is configured on the flip-up cover (332); The base cover (331) is connected to the vertical support surface (12) via a clamping mechanism (7); The clamping mechanism (7) includes a clamping bracket (71) and a clamping body (72). The clamping body (72) is disposed on the base cover (331). The clamping bracket (71) is fixed to the vertical support surface (12) by a fifth fastener. The clamping bracket (71) is detachably connected to the clamping bracket (72) so that the clamping bracket (71) and the clamping body (72) form a limiting locking engagement.

9. The monorail support structure for the box cover according to claim 1, characterized in that: The cover component (3) is in a standing position (3c) relative to the carriage. A support mechanism is provided between the cover component (3) and the single-layer side rail (1). The support mechanism can act on the cover component (3) so that the cover component (3) is kept in the standing position (3c). The support mechanism includes a strut (81), a first strut (81) seat, a second strut (81) seat, and a storage seat (84); The first support rod (81) seat is fixed to the vertical support surface (12) by the second fastener, and one end of the support rod (81) is rotatably connected to the first support rod (81) seat; The second support rod (81) seat is fixed to the cover component (3) by a third fastener, and the other end of the support rod (81) is detachably connected to the second support rod (81) seat; The storage base (84) includes a metal connecting base (841) and a plastic storage base (84) body. The metal connecting base (841) is fixed to the vertical support surface (12) by a fourth fastener, and the plastic storage base (84) body is fixed to the metal connecting base (841) by a fifth fastener. The plastic storage base (84) has a storage groove (843) for accommodating the support rod (81), the storage groove (843) has an inlet and outlet opening (844), and the width of the narrowest part of the inlet and outlet opening (844) is less than the radial dimension of the support rod (81).

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