An exterior modular carrying device for a vehicle

Abstract

The application relates to a vehicle external modular bearing device, belonging to the technical field of vehicle accessories, which comprises a first climbing rod, a second climbing rod arranged on one side of the first climbing rod, an upper step plate assembly arranged between the first climbing rod and the second climbing rod, a door shaft connecting handle arranged on the side of the first climbing rod away from the second climbing rod, and at least one lower step rod arranged below the upper step plate assembly. The lower step rod comprises a side hinge base and a hinge rod. The side hinge base is arranged on the side of the first climbing rod close to the door shaft connecting handle. One end of the hinge rod is connected to the side of the side hinge base away from the first climbing rod through a hinge shaft, so that the hinge rod can rotate around the hinge shaft and has a horizontal expansion working state and a storage state of being inwardly retracted close to the first climbing rod. The application can effectively avoid the possibility that a user climbs the lower step rod in a dangerous state of a vehicle tail door being open, thereby improving the safety.

Description

Technical Field

[0001] This application relates to the field of automotive parts, and in particular to an external modular load-bearing device for vehicles. Background Technology

[0002] In the use of RVs, campervans and other similar vehicles, the rooftop platform provides convenience for carrying luggage and goods. In order to climb onto the roof safely and conveniently, an integrated load-bearing device is usually installed at the rear of the vehicle. This device often combines the functions of a ladder and a spare tire rack.

[0003] Chinese patent CN220465367U discloses a rear-mounted anti-climb support frame device for a motorhome spare tire. It includes a ladder column and a ladder auxiliary frame mounted on the tailgate via a door hinge. Multiple footrest beams form a ladder frame between the two, and a spare tire rack frame is laterally connected to the lower part of the frame for mounting the spare tire. This support frame device integrates the ladder and spare tire rack, aiming to save space and facilitate climbing.

[0004] Regarding the above-mentioned technical solutions, the inventors believe that although such integrated load-bearing devices installed on the tailgate combine the ladder and the spare tire rack, saving external space of the vehicle and making it easier for users to climb, the footrest structure of the ladder is directly exposed and can be used at any time. When the tailgate is open, if the user steps directly on the ladder to climb, the entire device will shake because the tailgate can rotate freely, making it extremely unstable and prone to causing the user to fall and get injured due to instability of the footrest, posing a significant safety hazard. Summary of the Invention

[0005] To improve safety, this application provides an external modular load-bearing device for vehicles.

[0006] This application provides a modular external load-bearing device for vehicles, which adopts the following technical solution: An external modular load-bearing device for vehicles, comprising: First pole climb; The second climbing pole is located on one side of the first climbing pole; The upper pedal assembly is located between the first climbing pole and the second climbing pole; The door hinge connecting plate is located on the side of the first climbing rod away from the second climbing rod; At least one lower pedal is located below the upper pedal assembly; The lower step includes a side hinge seat and a hinge rod. The side hinge seat is located on the side of the first climbing rod near the door hinge connecting plate. One end of the hinge rod is connected to the side of the side hinge seat away from the first climbing rod through a hinge shaft, so that the hinge rod can rotate around the hinge shaft and has a horizontally extended working state and a retracted state close to the first climbing rod.

[0007] Optionally, when the hinge is in the working state, the lower edge of the end face of the hinge end of the hinge is a support plane, and the upper edge of the end face of the hinge end of the hinge is provided with a guide arc surface.

[0008] Optionally, when the hinge is in the working state, the free end of the hinge extends toward the side away from the second climbing rod, and when the vehicle tailgate is in the closed position, the upright projection of the hinge is at least partially located on the outside of the vehicle tailgate.

[0009] Optionally, the first climbing pole includes an upper section and a lower section that are detachably connected from top to bottom. The upper pedal assembly is located between the upper section and the second climbing pole. A spare tire rack is provided on the side of the lower section near the second climbing pole. The second climbing pole is detachably connected to the spare tire rack. The lower step is located on the side of the lower section away from the second climbing pole.

[0010] Optionally, the lower end of the lower section is slidably connected to a telescopic adjustment rod along its own length direction, the lower section is provided with a locking member for locking the telescopic adjustment rod, and the telescopic adjustment rod is provided with at least one extension step.

[0011] Optionally, the telescopic adjusting rod is provided with a T-shaped groove along its own length direction, the T-shaped groove extends to the lower end of the telescopic adjusting rod, a slider is slidably arranged in the horizontal groove of the T-shaped groove, the slider is arranged in a one-to-one correspondence with the extension step, a connecting screw is provided in the vertical groove of the T-shaped groove, the two ends of the connecting screw are respectively connected to the extension step and the corresponding slider, and the extension step is abutted against the side wall of the telescopic adjusting rod.

[0012] Optionally, the spare tire rack is provided with a right-angle hinge seat, the right-angle hinge seat is hinged to a support base, and the spare tire rack is also provided with a storage mechanism for storing the support base.

[0013] Optionally, the storage mechanism includes a lever plate and a hook portion formed on the lever plate. The lever plate is rotatably connected to the spare tire carrier via a pin. A torsion spring is sleeved on the pin. One end of the torsion spring is connected to the pin, and the other end is connected to the spare tire carrier. The spare tire carrier is provided with a limiting pin for holding the lever plate in its initial position. The limiting pin is located on the lower side of the lever plate. The free end of the support base is provided with a locking cylinder. When the support base is in the storage state, the locking cylinder engages with the hook portion.

[0014] Optionally, the end of the hook portion away from the lever plate is provided with a guide arc surface.

[0015] Optionally, the lock cylinder shaft is fixed to the support base frame via a connecting plate, and a clamping nut for pressing the hook portion against the connecting plate is threaded onto the lock cylinder shaft.

[0016] In summary, this application includes the following beneficial technical effects: By designing the side hinge and hinge rod, when the hinge rod is in the working state, if the tailgate is in the closed position, the free end of the hinge rod is outside the tailgate's outline. This means that when the tailgate is opened, the extended hinge rod will inevitably mechanically interfere with the door frame, preventing the tailgate from opening while the hinge rod is in the working state. This forces the user to retract the hinge rod to the stowed position before opening the tailgate. Conversely, when the tailgate is already open, attempting to turn the stowed hinge rod downwards to the working state will also fail due to interference between the hinge rod and the misaligned door frame, forcing the user to close the tailgate first. This two-way interference design eliminates the possibility of the user stepping on the lower lever to climb while the tailgate is open, creating a closed-loop safety operation of "closing the tailgate - extending the hinge rod - safe climbing - retracting the hinge rod - opening the tailgate," effectively correcting incorrect operating habits and improving user safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an external modular load-bearing device for vehicles according to an embodiment of this application.

[0018] Figure 2 This is a structural schematic diagram illustrating the connection relationship between the lower section and the telescopic adjustment rod in the embodiments of this application.

[0019] Figure 3 This is a structural diagram illustrating the hinge and support base in their respective retracted states in the embodiments of this application.

[0020] Figure 4 This is an exploded view illustrating the structure of the lower step bar in the embodiments of this application.

[0021] Figure 5 This is a structural schematic diagram illustrating the view from the back of the spare tire rack in the embodiments of this application.

[0022] Figure 6 yes Figure 3 A magnified view of a portion of point A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. First climbing rod; 11. Upper section rod; 12. Lower section rod; 121. Locking element; 13. Door hinge connecting plate; 131. Connecting hole; 2. Second climbing rod; 3. Upper pedal assembly; 4. Spare tire holder; 41. Right-angle hinge seat; 42. Support base frame; 421. Lock cylinder shaft; 422. Connecting plate; 423. Clamping nut; 43. Connecting through rod; 431. External thread section; 432. Limiting part; 4 33. Locking nut; 44. Pressure plate; 45. Adjustment groove; 5. Lower step rod; 51. Side hinge seat; 52. Hinge rod; 521. Support plane; 522. First guide arc surface; 6. Telescopic adjustment rod; 61. T-slot; 7. Extension step rod; 71. Slider; 72. Connecting screw; 8. Storage mechanism; 81. Paddle plate; 82. Hook part; 821. Second guide arc surface; 83. Shaft pin; 84. Torsion spring; 85. Limit pin. Detailed Implementation

[0024] The following combination Figures 1-6 This application will be described in further detail below.

[0025] Example: This application discloses an external modular load-bearing device for vehicles. (Refer to...) Figure 1 A modular external support device for vehicles includes a first climbing pole 1, a second climbing pole 2, an upper step assembly 3, and a spare tire carrier 4. The first climbing pole 1 includes an upper section 11 and a lower section 12 that are detachably and fixedly connected from top to bottom. The upper step assembly 3 is located between the upper section 11 and the second climbing pole 2. The spare tire carrier 4 is fixed to the lower section 12 on the side near the second climbing pole 2, and the lower end of the second climbing pole 2 is detachably fixed to the upper end of the spare tire carrier 4. The first climbing pole 1, the second climbing pole 2, and the upper step assembly 3 form a ladder frame. This support device can be disassembled into an upper ladder module and a lower spare tire carrier module, improving the convenience of packaging, transportation, and storage. Furthermore, users can flexibly select or quickly assemble the required modules according to specific vehicle configurations or personal preferences, significantly enhancing the product's versatility and providing convenience for later partial maintenance or upgrades.

[0026] Reference Figure 1 To facilitate the installation of the support device, door hinge connecting plates 13 are fixed on the side of the upper section 11 and the lower section 12 away from the second climbing rod 2. The door hinge connecting plates 13 are provided with connecting holes 131, which are used to correspond to the installation position of the upper door hinge of the vehicle tailgate during installation, and are fixedly connected to the vehicle tailgate by fasteners.

[0027] Reference Figures 1-3To enable the lower spare tire support module to have a certain auxiliary climbing function, thereby forming a continuous foot path with the upper climbing ladder module, the lower section 12 is provided with at least one lower step 5 on the side away from the second climbing rod 2. The lower step 5 includes a side hinge seat 51 and a hinge rod 52. The side hinge seat 51 is fixedly connected to the side of the first climbing rod 1 near the door hinge connecting plate 13. One end of the hinge rod 52 is connected to the side of the side hinge seat 51 away from the first climbing rod 1 through a hinge shaft, so that the hinge rod 52 can rotate around the hinge shaft and has a horizontally extended working state and a retracted state close to the first climbing rod 1.

[0028] Reference Figure 2 and Figure 4 When the hinge rod 52 is in a horizontally extended working state, the lower edge of the hinge end face of the hinge rod 52 is a support plane 521, and the upper edge of the hinge end face of the hinge rod 52 is provided with a first guide arc surface 522. When the hinge rod 52 is in a horizontal working state, the support plane 521 provides a bearing surface for the user to step on, preventing the hinge rod 52 from accidentally flipping downwards under load, ensuring stability and safety during climbing; the first guide arc surface 522 guides the hinge rod 52 to rotate smoothly upwards when the user needs to retract it.

[0029] Reference Figures 1-3 When hinge 52 is in the working state, the free end of hinge 52 extends away from the side opposite to the second climbing rod 2, and when the tailgate is in the closed position, the upright projection of hinge 52 is at least partially located on the outside of the tailgate. When hinge 52 is in the retracted state, the extension length of the lower step rod 5 relative to the lower section 12 is less than the extension length of the door hinge connecting plate 13 relative to the lower section 12. When hinge 52 is in the working state, if the tailgate is in the closed position, the free end of hinge 52 is already outside the tailgate outline, so that when the tailgate is opened, the extended hinge 52 will inevitably mechanically interfere with the vehicle door frame, thereby preventing the tailgate from being opened when hinge 52 is in the working state, forcing the user to retract hinge 52 to the retracted state before opening the tailgate. Conversely, when the tailgate is already open, attempting to turn the hinge 52, which is in the retracted state, downwards to the working state will also fail because the hinge 52 interferes with the already misaligned door frame, thus forcing the user to close the tailgate first.

[0030] Reference Figure 1 and Figure 2The lower end of the lower section 12 is slidably connected to a telescopic adjustment rod 6 along its length. A locking element 121, a locking bolt, is provided on the lower section 12 to secure the telescopic adjustment rod 6. At least one extension step 7 is provided on the side wall of the telescopic adjustment rod 6. In this embodiment, the telescopic adjustment rod 6 and the lower section 12 form a sleeve structure. By providing a slidable and lockable telescopic adjustment rod 6 at the lower end of the lower section 12, the extension length of the telescopic adjustment rod 6 can be flexibly adjusted. For vehicles with a high chassis / tailgate, the telescopic adjustment rod 6 can extend downwards, reducing the ground clearance of the extension step 7 and placing the foothold in a position easily accessible to the user. For vehicles with a low chassis, the telescopic adjustment rod 6 can retract upwards to prevent its lower end from excessively extending and touching the ground, affecting vehicle passability or causing component damage, thus achieving good compatibility of one device with multiple vehicle models.

[0031] Reference Figure 2 The telescopic adjustment rod 6 has a T-slot 61 along its length, extending to the lower end of the telescopic adjustment rod 6. A slider 71 is slidably mounted in the horizontal groove of the T-slot 61, corresponding one-to-one with the extension pedal 7. A connecting screw 72 is mounted in the vertical groove of the T-slot 61. One end of the connecting screw 72 is connected to the extension pedal 7, and the other end is threaded to the corresponding slider 71. The extension pedal 7 is pressed against the side wall of the telescopic adjustment rod 6. Thus, each extension pedal 7 can slide independently up and down along the telescopic adjustment rod 6 to adjust to the optimal foot position, and can also be securely locked by tightening. Furthermore, when adjusting the extension length of the telescopic adjustment rod 6, the extension pedal 7 can be slid to the lower end of the T-slot 61 to avoid interference, thus facilitating length adjustment. In addition, users can easily add, reduce or even completely remove all extension steps 7 according to actual needs (such as extremely low vehicle chassis or for the sake of simplicity), making the structural configuration highly flexible and avoiding abnormal noises or vibrations that may be generated by extra parts during driving.

[0032] Reference Figure 1 , Figure 3 and Figure 5The spare tire carrier 4 has a right-angle hinge seat 41 fixedly connected to the bottom of the side facing away from the vehicle's tailgate. The right-angle hinge seat 41 is hinged to a support base 42 for supporting the outer edge of the spare tire. The spare tire carrier 4 also has a storage mechanism 8 for storing the support base 42, which is used to fold and lock the support base 42 when not in use. A connecting rod 43 is provided on the side of the spare tire carrier 4 facing away from the vehicle's tailgate. The connecting rod 43 has an external thread section 431, and a pressure plate 44 is threaded onto the external thread section 431. In order to accommodate the installation position of spare tires with different outer diameters, the spare tire carrier 4 has an adjustment groove 45 that is elongated and vertically arranged. The connecting rod 43 passes through the adjustment groove 45, so it can be moved up and down for adjustment. A limit part 432 is fixed to one end of the connecting rod 43 that passes through the adjustment groove 45. A locking nut 433 is also threaded onto the connecting rod 43 for fastening the connecting rod 43 to the spare tire carrier 4 after the position is adjusted.

[0033] When storing the spare tire, the operating sequence is as follows: First, loosen the locking nut 433 and unfold the support base 42 to a horizontal working position. Next, pass the connecting rod 43 through the center hole of the spare tire and place the lower edge of the spare tire on the unfolded support base 42. Then, tighten the locking nut 433 and the pressure plate 44 at once. Through this series of operations, the lower end of the spare tire is supported and radially limited by the support base 42, while its axial direction is limited and fixed by the pressure plate 44. When the spare tire is not needed, the support base 42 can be flipped upwards and folded up, and locked by the storage mechanism 8, so that it fits snugly against the spare tire rack 4, thereby avoiding obstruction during climbing or driving and improving the convenience and safety of use.

[0034] Reference Figure 3 , Figure 5 and Figure 6 The storage mechanism 8 includes a lever plate 81 and a hook portion 82 integrally formed on the lever plate 81. A pin 83 is fixed on one side of the lever plate 81 and the lever plate 81 is rotatably connected to the spare tire rack 4 through the pin 83. A torsion spring 84 is sleeved on the pin 83. One end of the torsion spring 84 is fixed to the pin 83 and the other end is fixed to the side wall of the spare tire rack 4. The spare tire rack 4 is provided with a limiting pin 85 for holding the lever plate 81 in the initial position. The limiting pin 85 is located on the lower side of the lever plate 81. A locking cylinder 421 is fixed to the free end of the support base 42. When the support base 42 is in the storage state, the locking cylinder 421 is engaged with the hook portion 82. During operation, while using one hand to flip the support base 42 to the storage position, the user must use the other hand to push the lever 81 upwards to raise the latch 82. Once the support base 42 is in place, releasing the lever 81 causes the torsion spring 84 to automatically rotate the latch 82 downwards and engage with the lock cylinder shaft 421, thus completing the locking. The continuous force of the torsion spring 84 ensures that the engagement will not accidentally disengage without external intervention, while the limiting pin 85 ensures that the lever 81 remains stable in its initial position under natural conditions.

[0035] Reference Figure 6 Furthermore, the end of the hook portion 82 furthest from the lever plate 81 is provided with a second guide surface 821. When the user flips the support base 42 upward with one hand, the lock cylinder shaft 421 on the support base 42 will first contact the second guide surface 821 at the end of the hook portion 82 when it approaches the storage position. During the continued flipping process, the component force generated by the sliding of the lock cylinder shaft 421 along the second guide surface 821 will push the lever plate 81 to rotate automatically upward, thus replacing the action of using the other hand to manually operate the lever plate 81. When the support base 42 is fully in the storage position, the hook portion 82 will automatically reset under the action of the torsion spring 84 and engage with the lock cylinder shaft 421, simplifying the storage and locking operation and improving the user experience.

[0036] Reference Figure 6 The lock cylinder shaft 421 is fixed to the support base 42 via the connecting plate 422. A clamping nut 423 is threaded onto the lock cylinder shaft 421 to press the hook portion 82 against the connecting plate 422. By tightening the clamping nut 423, additional clamping force can be applied to the engaged hook portion 82, ensuring a tight fit with the connecting plate 422. This prevents accidental movement of the lever 81, further improving the stability of the support base 42 in its stowed state and enhancing its reliability and durability under long-term use and various complex road conditions and vibrations.

[0037] The implementation principle of the vehicle external modular support device in this application embodiment is as follows: Through the arrangement of the side hinge seat 51 and the hinge rod 52, when the hinge rod 52 is in the working state, if the vehicle tailgate is in the closed position, the free end of the hinge rod 52 is already outside the tailgate outline. This means that when the tailgate is opened, the extended hinge rod 52 will inevitably mechanically interfere with the vehicle door frame, thereby preventing the tailgate from being opened when the hinge rod 52 is in the working state. This forces the user to retract the hinge rod 52 to the retracted state before opening the tailgate. Conversely, when the tailgate is already in the open state, attempting to turn the retracted hinge rod 52 downwards to the working state will also fail due to interference between the hinge rod 52 and the misaligned door frame, thus forcing the user to close the tailgate first. This two-way interference safety design, which prevents the door from opening when in operation and prevents it from unfolding when open, eliminates the possibility of users stepping on the lower lever 5 to climb when the tailgate is open, thus forcing a unique and safe closed-loop operation of "closing the tailgate - unfolding the hinge lever 52 - safe climbing - retracting the hinge lever 52 - opening the tailgate". This effectively corrects incorrect operating habits and improves safety.

[0038] Furthermore, the modular design of this support device extends to the spare tire support module. A retractable support base 42 is hinged to the spare tire rack 4 and locked in place by a storage mechanism 8. When the spare tire needs to be installed, the support base 42 is unfolded to support the outer edge of the spare tire from the bottom. Simultaneously, an adjustable connecting rod 43 and a pressure plate 44 are passed through the center hole of the spare tire and tightened, thereby axially pressing and securing the spare tire. When the spare tire is not needed, the support base 42 can be retracted and locked, fitting snugly against the spare tire rack 4, thus eliminating protruding obstacles and making the climbing process smoother without requiring the user to carefully avoid obstacles.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A modular external load-bearing device for vehicles, characterized in that, include: First pole climb (1); The second climbing pole (2) is located on one side of the first climbing pole (1); The upper pedal assembly (3) is located between the first climbing pole (1) and the second climbing pole (2); The door hinge connecting plate (13) is located on the side of the first climbing rod (1) away from the second climbing rod (2); At least one lower pedal (5) is located below the upper pedal assembly (3); The lower step (5) includes a side hinge seat (51) and a hinge rod (52). The side hinge seat (51) is located on the side of the first climbing rod (1) near the door hinge connecting plate (13). One end of the hinge rod (52) is connected to the side of the side hinge seat (51) away from the first climbing rod (1) through a hinge shaft, so that the hinge rod (52) can rotate around the hinge shaft and has a horizontally extended working state and a retracted state that is close to the first climbing rod (1).

2. The vehicle external modular load-bearing device according to claim 1, characterized in that: When the hinge rod (52) is in the working state, the lower edge of the end face of the hinge end of the hinge rod (52) is a support plane (521), and the upper edge of the end face of the hinge end of the hinge rod (52) is provided with a first guide arc surface (522).

3. The vehicle external modular load-bearing device according to claim 1, characterized in that: When the hinge (52) is in the working state, the free end of the hinge (52) extends toward the side away from the second climbing rod (2), and when the vehicle tailgate is in the closed position, the upright projection of the hinge (52) is at least partially located on the outside of the vehicle tailgate.

4. The vehicle external modular load-bearing device according to claim 1, characterized in that: The first climbing pole (1) includes an upper section (11) and a lower section (12) that are detachably connected from top to bottom. The upper pedal assembly (3) is located between the upper section (11) and the second climbing pole (2). A spare tire rack (4) is provided on the side of the lower section (12) near the second climbing pole (2). The second climbing pole (2) is detachably connected to the spare tire rack (4). The lower step (5) is located on the side of the lower section (12) away from the second climbing pole (2).

5. A vehicle external modular load-bearing device according to claim 4, characterized in that: The lower end of the lower section (12) is slidably connected to a telescopic adjustment rod (6) along its own length direction. The lower section (12) is provided with a locking member (121) for locking the telescopic adjustment rod (6). The telescopic adjustment rod (6) is provided with at least one extension step (7).

6. A vehicle external modular load-bearing device according to claim 5, characterized in that: The telescopic adjustment rod (6) has a T-shaped groove (61) along its length direction. The T-shaped groove (61) extends to the lower end of the telescopic adjustment rod (6). A slider (71) is slidably arranged in the horizontal groove of the T-shaped groove (61). The slider (71) is arranged in a one-to-one correspondence with the extension step (7). A connecting screw (72) is provided in the vertical groove of the T-shaped groove (61). The two ends of the connecting screw (72) are respectively connected to the extension step (7) and the corresponding slider (71). The extension step (7) is abutted against the side wall of the telescopic adjustment rod (6).

7. A vehicle external modular load-bearing device according to claim 4, characterized in that: The spare tire rack (4) is provided with a right-angle hinge seat (41), which is hinged to a support base (42) for supporting the outer edge of the spare tire. The spare tire rack (4) is also provided with a storage mechanism (8) for storing the support base (42).

8. A vehicle external modular load-bearing device according to claim 7, characterized in that: The storage mechanism (8) includes a lever (81) and a hook portion (82) formed on the lever (81). The lever (81) is rotatably connected to the spare tire rack (4) via a shaft pin (83). A torsion spring (84) is sleeved on the shaft pin (83). One end of the torsion spring (84) is connected to the shaft pin (83), and the other end is connected to the spare tire rack (4). The spare tire rack (4) is provided with a limiting pin (85) for holding the lever (81) in the initial position. The limiting pin (85) is located on the lower side of the lever (81). The free end of the support base (42) is provided with a locking core shaft (421). When the support base (42) is in the storage state, the locking core shaft (421) engages with the hook portion (82).

9. A vehicle external modular load-bearing device according to claim 8, characterized in that: The hook portion (82) has a second guide surface (821) at the end away from the lever plate (81).

10. A vehicle external modular load-bearing device according to claim 8, characterized in that: The lock cylinder (421) is fixed to the support base (42) via the connecting plate (422), and the lock cylinder (421) is threaded with a clamping nut (423) for pressing the hook part (82) onto the connecting plate (422).

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