Ladder assembly suitable for vehicle and roof platform device

Abstract

The utility model provides a ladder assembly and a roof platform device suitable for a vehicle. The ladder assembly comprises a framework, a machine shell and a ladder body. The framework extends up and down, and the top of the framework is configured to be connected with a platform assembly arranged on the top of the vehicle. The machine shell is fixedly connected with the framework in a wrapping mode, and an attaching part used for being attached to the side wall of the vehicle and an air guide part protruding in the direction away from the attaching part are formed on the machine shell. The number of the air guide parts is two, and the two air guide parts are separated in the front-back direction so as to define a containing cavity opposite to an opening of the air guide parts. The opposite sides, in the front-back direction, of the two air guide parts are provided with air guide inclined faces located away from the attaching part, and the two air guide inclined faces gradually get close to each other in the direction away from the attaching part. The ladder body is connected in the containing cavity of the machine shell and comprises at least two ladder sections which are connected together in a folding mode and / or in a drawing mode. According to the ladder assembly, the problem that the wind resistance of the ladder assembly is large is effectively solved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ladder assemblies for vehicles, in particular to a ladder assembly and a roof platform device for vehicles. Background Art

[0002] The ladder assemblies used on some existing vehicles follow the ladder structure used on some medium and large vehicles such as engineering vehicles, buses, and RVs. The climbing height of the ladder structure is a fixed value, and it extends downward from the top of the vehicle to the middle of the side of the vehicle body.

[0003] To prevent the ladder from interfering with the rear doors of passenger vehicles (such as city SUVs and hardcore SUVs), ladders are typically placed on the side of the vehicle (such as the dedicated ladders on Land Rover vehicles). To further facilitate boarding and alighting, a folding mechanism has been added to the ladder, allowing it to extend to the vehicle's wheel hub when deployed.

[0004] However, when a passenger car is driving at high speed, the vertical windward surfaces presented by the front and rear sides of the ladder structure will increase the wind resistance of the passenger car, and due to the large wind resistance, the connection strength between the ladder structure and the roof longitudinal rails will also become unreliable. In the mildest case, the service life of the ladder structure will be shortened, and in the worst case, it will have an adverse effect on the normal driving safety of the vehicle. Utility Model Content

[0005] In view of the above problems, the present invention is proposed to provide a ladder assembly and a roof platform device suitable for vehicles that overcome the above problems or at least partially solve the above problems, which can solve the problem of large wind resistance of the existing ladder structure and achieve the purpose of improving user experience.

[0006] Specifically, the utility model provides a ladder assembly suitable for a vehicle, comprising:

[0007] The frame extends up and down, and the top of the frame is configured to be connected to a platform assembly arranged on the top of the vehicle.

[0008] A housing is fixedly connected to the frame in a wraparound manner and defines a fitting portion for fitting against the side of the vehicle, and an air guide portion protruding away from the fitting portion. The air guide portions are two in number, spaced apart in the front-to-back direction to define a receiving cavity open away from the air guide portions. The two air guide portions have inclined air guide surfaces on opposite sides of the front-to-back direction, located away from the fitting portion, with the two inclined air guide surfaces gradually converging in a direction away from the fitting portion.

[0009] A ladder body is connected in the accommodating cavity of the casing and comprises at least two ladder sections connected together by folding and / or drawing.

[0010] Optionally, at least two of the ladder sections are unfolded into a first ladder section, a second ladder section, and a third ladder section that are sequentially connected from top to bottom, the second ladder section and the third ladder section are connected together in an articulated manner or a pull-out manner, and the third ladder section is configured to extend to the ground on which the vehicle is located. And,

[0011] The ladder body also includes:

[0012] A rocker, one end of which is connected to the frame and the other end is connected to the first ladder section, and there are at least two rocker links, so that the two rocker links, the first ladder section, and the frame form a four-bar linkage. A connecting protrusion is formed on the frame after passing through the housing and extending into the accommodating cavity.

[0013] Optionally, at least two of the ladder sections are unfolded into a first ladder section and a second ladder section pulled downward from the first ladder section, the second ladder section has at least two sections, at least two of the second ladder sections are pulled together, and the lowermost second ladder section is configured to extend to the ground where the vehicle is located. And,

[0014] The ladder body also includes:

[0015] A rocker, one end of which is connected to the frame and the other end is connected to the first ladder section, and there are at least two rocker links, so that the two rocker links, the first ladder section, and the frame form a four-bar linkage. A connecting protrusion is formed on the frame after passing through the housing and extending into the accommodating cavity.

[0016] Optionally, at least two of the ladder sections are unfolded into a first ladder section, a second ladder section, and a third ladder section that are sequentially connected from top to bottom. The first ladder section is embedded in the accommodating cavity and fixedly connected to the frame. The top of the second ladder section is hinged to the bottom of the first ladder section via a connecting frame, and the top of the third ladder section is hinged to the bottom of the third ladder section. A limiting structure is formed at the bottom of the first ladder section to stop at the lower side of the connecting frame to ensure a gap between the first ladder section and the second ladder section in the left-right direction.

[0017] Optionally, the third ladder section includes:

[0018] The first sub-ladder has its top hinged to the top of the second ladder section and is stacked on a side of the second ladder section away from the fitting portion. The bottom of the first sub-ladder is flush with or lower than the bottom of the second ladder section.

[0019] The second sub-ladder has its top hinged to the bottom of the first sub-ladder so that the second sub-ladder can be folded to the underside of the second ladder section and is located between the first sub-ladder and the first ladder section in the left-right direction.

[0020] Optionally, the ladder assembly further comprises two cover plates spaced apart in the front-to-rear direction, wherein the upper ends of the cover plates are fixedly connected to the frame and the lower ends extend to the upper end of the ladder body. The cover plates are positioned between the two air guides, and in the left-right direction, the outer surfaces of the cover plates are flush with the outer surfaces of the air guides.

[0021] Optionally, the housing is made of plastic.

[0022] The fitting portion includes two reinforcement grooves spaced apart in the front-to-back direction, with the openings of the reinforcement grooves facing away from the air guide portion. A plurality of reinforcement ribs are disposed within the reinforcement grooves, spaced apart vertically. In the left-to-right direction, the ends of the reinforcement ribs closest to the openings of the reinforcement grooves are flush with the edges of the openings of the reinforcement grooves.

[0023] Optionally, the ladder sections at each level are connected by latches to facilitate relative locking of the ladder sections after the ladder assembly is folded. And / or,

[0024] The ladder sections at each level are connected by magnetic attraction so that the ladder sections are relatively locked after the ladder assembly is folded. And / or,

[0025] The ladder sections at each level are connected by buckles, so that the ladder sections are relatively locked after the ladder assembly is folded.

[0026] Optionally, each step includes at least one transversely arranged step, and a non-slip rubber pad is provided on the top of each step.

[0027] The utility model also provides a platform device suitable for a vehicle, comprising:

[0028] A platform assembly is configured to be attached to a top portion of the vehicle.

[0029] As in the above-mentioned ladder assembly, the ladder assembly is connected to the platform assembly via a connector, wherein the connector is L-shaped, with one side wall defining a first connection hole for connecting to the platform assembly and the other side wall defining a second connection hole for connecting to the frame of the ladder assembly.

[0030] In the ladder assembly of this utility model, the air guide portion of the housing is provided with inclined air guide surfaces that gradually converge in the direction away from the contact portion, thereby reducing the wind resistance coefficient of the housing. Furthermore, the contact portion of the housing conforms to the side of the vehicle, minimizing the gap between the housing and the vehicle. The addition of rubber pads can even eliminate the gap between the housing and the vehicle, effectively reducing airflow passing between the contact portion and the vehicle, thereby reducing wind resistance experienced by the ladder assembly. This utility model effectively solves the problem of high wind resistance in ladder assemblies and enhances the user experience.

[0031] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0033] Figure 1 is a schematic structural diagram of a ladder assembly according to one embodiment of the present utility model;

[0034] Figure 2 is a schematic structural diagram of a ladder assembly according to one embodiment of the present utility model;

[0035] Figure 3 is a schematic structural diagram of a ladder assembly according to one embodiment of the present utility model;

[0036] Figure 4 is a schematic structural diagram of a ladder assembly according to one embodiment of the present utility model;

[0037] Figure 5 It is a schematic structural diagram of a ladder assembly according to an embodiment of the present utility model.

[0038] List of reference numerals:

[0039] 100, skeleton;

[0040] 200, housing; 210, fitting portion; 220, air guide portion; 221, air guide slope; 230, accommodating cavity;

[0041] 300, ladder body; 310, ladder steps; 320, swing arm; 330, pedal;

[0042] 400, cover plate;

[0043] 500, reinforcement groove; 510, reinforcement rib;

[0044] 600. Connectors. DETAILED DESCRIPTION

[0045] Refer to the following Figures 1 to 5 To describe the ladder assembly and roof platform device suitable for vehicles in an embodiment of the present invention. In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0046] Unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," "fixed," and "coupled" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly limited. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0047] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. That is, in the description of this embodiment, the first feature being "above," "above," and "above" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below," "below," or "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0049] Figure 1 Schematic diagram of a ladder assembly according to an embodiment of the present invention. Figure 1 As shown, and reference Figures 2 to 5 The embodiment of the present invention provides a ladder assembly suitable for a vehicle. The ladder assembly includes a frame 100, a casing 200 and a ladder body 300.

[0050] The frame 100 extends up and down, and a top portion thereof is configured to be connected to a platform assembly provided on a top portion of a vehicle.

[0051] The housing 200 is securely connected to the frame 100 and includes a fitting portion 210 for fitting against the side panel of the vehicle, and an air guide portion 220 protruding away from the fitting portion 210. Two air guide portions 220 are provided, spaced apart in the front-to-back direction to define a receiving cavity 230 that opens away from the air guide portions 220. The two air guide portions 220 have inclined air guide surfaces 221 on opposite sides of the front-to-back direction, facing away from the fitting portion 210. The two inclined air guide surfaces 221 gradually converge as they move away from the fitting portion 210.

[0052] The ladder body 300 is connected to the accommodating cavity 230 of the housing 200 and includes at least two ladder sections 310 folded and connected together.

[0053] Alternatively, in some embodiments of the present invention, the ladder body 300 includes at least two ladder sections 310 that are drawably connected together.

[0054] The ladder assembly is installed on the lateral side of the vehicle to prevent the ladder assembly from affecting the opening and closing of the rear door. The above-mentioned "front" and "rear" may refer to the front and rear of the vehicle, that is, the front of the vehicle is at the front end of the rear of the vehicle.

[0055] In the above embodiment, the user can remove the ladder body 300 from the accommodating cavity 230 and unfold at least two ladder sections 310 to climb to the vehicle roof by stepping on the ladder body 300 when the ladder assembly is in the open state. While the vehicle is in motion, the ladder body 300 needs to be folded to one side of the frame 100 and stored in the accommodating cavity 230 to protect the ladder body 300 from wind resistance. This allows the majority of wind resistance to be borne by the housing 200, which is wrapped around the frame 100 and ladder body 300. The air guide portion 220 of the housing 200 is provided with an air guide slope 221, which gradually converges in the direction away from the fitting portion 210, thereby reducing the wind resistance coefficient of the housing 200. Furthermore, the fitting portion 210 of the housing 200 fits against the side of the vehicle, minimizing the gap between the housing 200 and the vehicle. This gap can even be eliminated by adding a rubber pad, thereby reducing airflow passing between the fitting portion 210 and the vehicle and further reducing wind resistance to the ladder assembly. This effectively solves the problem of high wind resistance in the ladder assembly and enhances the user experience.

[0056] In some embodiments of the present invention, at least two ladder sections 310 are unfolded into a first ladder section, a second ladder section, and a third ladder section connected in sequence from top to bottom, the second ladder section and the third ladder section are connected together hingedly or pull-connected, and the third ladder section is constructed to extend to the ground where the vehicle is located.

[0057] The ladder body 300 also includes a rocker 320. One end of the rocker 320 is connected to the frame 100, and the other end is connected to the first ladder section. There are at least two rocker 320, so that the two rocker 320, the first ladder section, and the frame 100 form a four-bar linkage. The frame 100 has a connecting protrusion formed on it that passes through the housing 200 and extends into the accommodating cavity 230.

[0058] In this embodiment, the third ladder section is in contact with the ground, and the first ladder section is connected to the frame 100, so that both ends of the ladder assembly are fixed, thereby making the structure of the ladder assembly more stable when in the unfolded state, reducing the shaking of the ladder assembly when the user climbs, improving the safety of the ladder assembly, and at the same time reducing the occurrence of wear on the vehicle body due to the shaking of the ladder assembly, thereby improving the user experience.

[0059] The swing link 320 is connected to the frame 100 via a connecting protrusion. A swing link 320 is provided on both the front and rear sides of the first ladder section. The first ladder section can be stored in or removed from the accommodating cavity 230 by swinging the swing link 320. When the second and third ladder sections need to be stored, they are positioned to one side of the first ladder section. This allows the second and third ladder sections to be pushed into the accommodating cavity 230 when the first ladder section is pushed into the accommodating cavity 230, thus protecting the second and third ladder sections from wind resistance.

[0060] In some embodiments of the present invention, at least two ladder sections 310 are unfolded into a first ladder section and a second ladder section pulled downward from the first ladder section, the second ladder section has at least two sections, at least two second ladder sections are pulled together, and the lowest second ladder section is constructed to extend to the ground where the vehicle is located.

[0061] The ladder body 300 also includes a rocker 320. One end of the rocker 320 is connected to the frame 100, and the other end is connected to the first ladder section. There are at least two rocker 320, so that the two rocker 320, the first ladder section, and the frame 100 form a four-bar linkage. The frame 100 has a connecting protrusion formed on it that passes through the housing 200 and extends into the accommodating cavity 230.

[0062] In this embodiment, the second ladder section, the lowest section, is in contact with the ground, and the first ladder section is connected to the frame 100, securing both ends of the ladder assembly. This provides greater structural stability when the ladder assembly is deployed, reducing swaying when a user climbs, improving safety, and reducing wear and tear on the vehicle body caused by swaying. The retractable connection of the second ladder section simplifies the extension and retraction of the ladder body 300, improving the user experience.

[0063] In some embodiments of the present invention, each second ladder section has at least one fixed position after being unfolded, so that the length of the ladder body 300 can be adjusted as needed, so that the ladder assembly can be applied to more scenarios and improve the user experience.

[0064] In some embodiments of the present invention, at least two ladder sections 310 are unfolded into a first ladder section, a second ladder section, and a third ladder section that are sequentially connected from top to bottom. The first ladder section is embedded in the accommodating cavity 230 and is fixedly connected to the frame 100. The top of the second ladder section is hinged to the bottom of the first ladder section via a connecting frame, and the top of the third ladder section is hinged to the bottom of the third ladder section. A limiting structure is formed at the bottom of the first ladder section, which stops at the bottom of the connecting frame, to ensure a gap between the first and second ladder sections in the left-right direction.

[0065] In this embodiment, the top of the second ladder section can be folded above the bottom of the first ladder section, and the bottom of the third ladder section can be folded below the top of the second ladder section. When the ladder assembly is needed, the third ladder section can be pulled out first, so that the third ladder section drives the second ladder section to move, and then the second ladder section drives the first ladder section to move until the end of the third ladder section away from the second ladder section contacts the ground, so that the ladder assembly is in the unfolded state for the user to climb.

[0066] After the ladder assembly is installed on the roof platform or the vehicle, the limiting structure stops at the lower side of the connecting frame when the ladder assembly is in the unfolded state, thereby preventing the second ladder segment of the ladder assembly from being too close to the vehicle body, thereby preventing the second ladder segment from shaking and contacting the vehicle body or even scratching the vehicle body, thereby improving the user experience.

[0067] In some embodiments of the present invention, the third ladder section includes a first sub-ladder and a second sub-ladder.

[0068] The top of the first sub-ladder is hinged to the top of the second ladder section and is stacked on the side of the second ladder section away from the fitting portion 210. The bottom of the first sub-ladder is flush with or lower than the bottom of the second ladder section.

[0069] The top of the second sub-ladder is hinged to the bottom of the first sub-ladder so that the second sub-ladder can be folded to the lower side of the second ladder section and is located between the first sub-ladder and the first ladder section in the left-right direction.

[0070] In this embodiment, the second sub-ladder is designed so that when the second ladder section and the first sub-ladder are deployed, the inclination angle of the second ladder section and the first sub-ladder can be adjusted by rotating the second ladder section, i.e., by changing the height of the second ladder section's top from the ground. Furthermore, the adjustable height of the second ladder section's top from the ground allows the ladder assembly to be used on vehicles with varying roof heights, improving the ladder assembly's adaptability.

[0071] In some embodiments of the present invention, a lock is provided between the first ladder section and the second ladder section to facilitate relative locking of the first ladder section and the second ladder section after the ladder assembly is folded.

[0072] In this embodiment, since the second ladder section is located between the first ladder section and the first sub-ladder in the third ladder section, the first ladder section and the box cover are locked together by a lock, and the second ladder section is also locked at the same time. This reduces the production cost of the ladder assembly by reducing the number of locks, and effectively prevents people other than the user from unfolding the ladder assembly, making the ladder assembly less likely to be damaged.

[0073] Alternatively, in some embodiments of the present invention, a lock is provided between the first ladder section and the third ladder section to facilitate relative locking of the first ladder section and the third ladder section after the ladder assembly is folded.

[0074] Alternatively, in some embodiments of the present invention, a lock is provided between the second ladder section and the third ladder section to facilitate relative locking of the second ladder section and the third ladder section after the ladder assembly is folded.

[0075] In some embodiments of the present invention, when the lock is disposed between the first and third ladder sections, the lock comprises a lock slot fixedly connected to the third ladder section and a latch fixedly connected to the first ladder section. The lock slot extends vertically through the ladder section. The latch is movable vertically so as to be movably engaged with the lock slot.

[0076] In some embodiments of the present invention, the ladder assembly further includes two cover plates 400 spaced apart in the front-to-back direction. The upper ends of the cover plates 400 are fixedly connected to the frame 100, and the lower ends extend to the upper end of the ladder body 300. The cover plates 400 are positioned between the two air guides 220, and the outer surfaces of the cover plates 400 are flush with the outer surfaces of the air guides 220 in the left-right direction.

[0077] In this embodiment, the cover plate 400 is located above the ladder body 300 and together with the casing 200 covers the ladder body 300, further reducing the wind resistance of the ladder body 300. Moreover, the outer surface of the cover plate 400 is flush with the outer surface of the air guide part 220, making the airflow more stable when passing through the ladder assembly, avoiding the generation of large wind resistance.

[0078] In some embodiments of the present invention, the housing 200 is made of plastic.

[0079] The fitting portion 210 includes two reinforcement grooves 500 spaced apart in the front-to-back direction, with the openings of the reinforcement grooves 500 facing away from the air guide portion 220. A plurality of reinforcement ribs 510 are disposed in the reinforcement grooves 500, spaced apart vertically. In the left-right direction, the ends of the reinforcement ribs 510 closest to the openings of the reinforcement grooves 500 are flush with the edges of the openings of the reinforcement grooves 500.

[0080] In this embodiment, the use of plastic material to manufacture the housing 200 can reduce the weight of the housing 200, thereby reducing the load weight of the vehicle and achieving the purpose of saving vehicle energy. The design of the reinforcing ribs 510 improves the stability and strength of the overall structure of the housing 200 by providing two reinforcing grooves 500 spaced apart in the front-to-back direction. The opening of the reinforcing grooves 500 faces away from the air guide portion 220. That is, after being installed on the side of the vehicle, the opening of the reinforcing grooves 500 faces the vehicle, avoiding interference from airflow during vehicle operation and thus preventing increased wind resistance to the ladder assembly. Multiple reinforcing ribs 510 are provided in the reinforcing grooves 500, further improving the structural strength of the housing 200. In the left-right direction, the end of the reinforcing rib 510 closest to the opening of the reinforcing groove 500 is flush with the edge of the groove opening. That is, after the ladder assembly is installed on one side of the vehicle, the reinforcing ribs 510 are flush with the side of the fitting portion 210 closest to the vehicle. This not only ensures the stability of the reinforcing ribs 510, but also prevents the reinforcing ribs 510 from scratching the vehicle.

[0081] In some embodiments of the present invention, each ladder section 310 is connected by a latch, so that the ladder sections 310 are locked relative to each other after the ladder assembly is folded.

[0082] In this embodiment, the structure of locking the ladder sections 310 by using latch connections is simple, easy to design and manufacture, and reduces the production cost of the ladder assembly.

[0083] In some other embodiments of the present invention, the ladder sections 310 are connected by magnetic attraction, so that the ladder sections 310 are locked relative to each other after the ladder assembly is folded.

[0084] In some other embodiments of the present invention, the ladder sections 310 are connected by snap-fits, so that the ladder sections 310 are locked relative to each other after the ladder assembly is folded.

[0085] In some embodiments of the present invention, each step 310 includes at least one horizontally arranged pedal board 330 , and a non-slip rubber pad is provided on the top of each pedal board 330 .

[0086] In this embodiment, the user climbs by stepping on the stepping plate 330. Since the vehicle is usually set up outdoors, providing an anti-skid rubber pad on the stepping plate 330 can reduce the risk of the user slipping on the ladder assembly in rainy or snowy environments.

[0087] An embodiment of the present invention provides a platform device suitable for a vehicle, comprising a platform assembly and a ladder assembly as described in any of the above embodiments.

[0088] The platform assembly is configured to be attached to a top portion of a vehicle.

[0089] The ladder assembly is connected to the platform assembly via a connector 600. The connector 600 is L-shaped, with one sidewall defining a first connection hole for connecting to the platform assembly and the other sidewall defining a second connection hole for connecting to the frame 100 of the ladder assembly.

[0090] In this embodiment, the platform assembly is used to place luggage and install a tent to increase the vehicle's carrying capacity. The platform assembly is connected to the top of the vehicle and provides a connection point for the installation of the ladder assembly.

[0091] The ladder assembly is connected to the platform assembly via connector 600. One sidewall of connector 600 features a first connection hole for securely engaging the platform assembly. The other sidewall features a second connection hole for connecting to the ladder assembly's frame 100, thereby securing the ladder assembly to the platform assembly. The design of connector 600 not only saves installation space but also provides excellent structural stability, ensuring the ladder assembly will not loosen or shift during use.

[0092] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention can be directly determined or deduced from the contents disclosed herein without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A ladder assembly suitable for a vehicle, characterized in that: include: a frame extending up and down, with a top portion thereof being configured to be connected to a platform assembly disposed on a top portion of the vehicle; A casing, the casing being fixedly connected to the frame in a covering manner and forming a fitting portion for fitting on the side wall of the vehicle, and an air guide portion protruding in a direction away from the fitting portion; wherein the air guide portions are two, and the two air guide portions are spaced apart in the front-to-back direction to define a receiving cavity open away from the air guide portions; wherein the two air guide portions have an air guide inclined surface on opposite sides in the front-to-back direction, which is located away from the fitting portion, and the two air guide inclined surfaces gradually converge in a direction away from the fitting portion; A ladder body is connected in the accommodating cavity of the casing and comprises at least two ladder sections connected together by folding and / or drawing.

2. The ladder assembly according to claim 1, wherein: At least two of the ladder sections are unfolded into a first ladder section, a second ladder section, and a third ladder section that are sequentially connected from top to bottom, the second ladder section and the third ladder section are connected together in an articulated manner or a pull-through connection, and the third ladder section is configured to extend to the ground on which the vehicle is located; and The ladder body also includes: A rocker rod, one end of which is connected to the frame and the other end is connected to the first ladder section, and there are at least two rocker rods, so as to form a four-bar linkage mechanism with the two rocker rods, the first ladder section, and the frame; wherein a connecting protrusion is formed on the frame after passing through the housing and extending into the accommodating cavity.

3. The ladder assembly according to claim 1, wherein: At least two of the ladder sections are unfolded into a first ladder section and a second ladder section pulled downward from the first ladder section, the second ladder section has at least two sections, at least two of the second ladder sections are pulled together, and the lowermost second ladder section is configured to extend to the ground on which the vehicle is located; and, The ladder body also includes: A rocker rod, one end of which is connected to the frame and the other end is connected to the first ladder section, and there are at least two rocker rods, so as to form a four-bar linkage mechanism with the two rocker rods, the first ladder section, and the frame; wherein a connecting protrusion is formed on the frame after passing through the housing and extending into the accommodating cavity.

4. The ladder assembly according to claim 1, wherein: At least two of the ladder sections are unfolded into a first ladder section, a second ladder section and a third ladder section that are connected in sequence from top to bottom. The first ladder section is embedded in the accommodating cavity and fixedly connected to the frame. The top of the second ladder section is hinged to the bottom of the first ladder section via a connecting frame, and the top of the third ladder section is hinged to the bottom of the third ladder section. A limiting structure is formed at the bottom of the first ladder section to stop the lower side of the connecting frame, so as to ensure a distance between the first ladder section and the second ladder section in the left and right directions.

5. The ladder assembly according to claim 4, wherein: The third section includes: a first sub-ladder, wherein the top of the first sub-ladder is hinged to the top of the second ladder section and is stacked on a side of the second ladder section away from the fitting portion; and the bottom of the first sub-ladder is flush with or lower than the bottom of the second ladder section; The second sub-ladder has its top hinged to the bottom of the first sub-ladder so that the second sub-ladder can be folded to the underside of the second ladder section and is located between the first sub-ladder and the first ladder section in the left-right direction.

6. The ladder assembly according to claim 1, wherein: The ladder assembly also includes two cover plates spaced apart in the front-to-back direction, the upper ends of the cover plates being fixedly connected to the frame, and the lower ends extending to the upper end of the ladder body; the cover plates are located between the two air guides, and in the left-right direction, the outer surfaces of the cover plates are flush with the outer surfaces of the air guides.

7. The ladder assembly according to claim 1, wherein: The housing is made of plastic; The fitting portion includes two reinforcement grooves arranged at intervals along the front-to-back direction, and the openings of the reinforcement grooves are arranged in the direction away from the air guide portion; a plurality of reinforcement ribs arranged at intervals along the upper and lower directions are arranged in the reinforcement grooves; in the left and right directions, the end of the reinforcement rib close to the opening of the reinforcement groove is flush with the edge of the opening of the reinforcement groove.

8. The ladder assembly according to claim 1, wherein: The ladder sections at each level are connected by latches to facilitate relative locking between the ladder sections after the ladder assembly is folded; and / or, The ladder sections at each level are connected by magnetic attraction, so that the ladder sections are relatively locked after the ladder assembly is folded; and / or, The ladder sections at each level are connected by buckles, so that the ladder sections are relatively locked after the ladder assembly is folded.

9. The ladder assembly according to claim 1, wherein: Each step comprises at least one horizontally arranged step, and the top of each step is provided with an anti-skid rubber pad.

10. A platform device suitable for a vehicle, characterized in that: include: a platform assembly configured to be attached to a top portion of the vehicle; A ladder assembly as described in any one of claims 1 to 9 above, wherein the ladder assembly is connected to the platform assembly via a connector; wherein the connector is L-shaped, with one side wall defining a first connecting hole connected to the platform assembly, and the other side wall defining a second connecting hole connected to the skeleton of the ladder assembly.

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