Vehicle-mounted extension ladder

By designing a vehicle-mounted telescopic ladder with the main and auxiliary ladders tilted, combined with handrails and stops, the problems of inconvenience and safety hazards in climbing stairs in RVs are solved, achieving a safe and convenient climbing effect.

CN224256558UActive Publication Date: 2026-05-19ZHONGCHENG AUTOMOBILE (SHANDONG) CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHONGCHENG AUTOMOBILE (SHANDONG) CO LTD
Filing Date
2025-08-08
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

The existing RV ladders are fixed vertically, which makes climbing inconvenient and poses a safety hazard, as the owner is prone to falling backward.

Method used

Design a vehicle-mounted telescopic ladder, including a main ladder and an auxiliary ladder, which are connected to the hinged seat via a hinge block. The main ladder and the auxiliary ladder can be tilted. Combined with the design of the handrail and stop, the ladder can form an inclined angle with the RV, making it easy to climb.

Benefits of technology

It effectively prevents car owners from falling, improves climbing convenience, and reduces safety hazards.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224256558U_ABST
    Figure CN224256558U_ABST
Patent Text Reader

Abstract

The utility model discloses a vehicle-mounted extension ladder, and relates to the technical field of vehicle-mounted cabin climbing ladders. Comprising a fixed frame, an extension ladder is hinged to an inner cavity of the fixed frame, the extension ladder is hinged to the upper portion of the fixed frame, the extension ladder comprises a main ladder and an auxiliary ladder, hinge blocks are symmetrically arranged on the upper portion of the main ladder, hinge seats are symmetrically arranged on the upper portion of the fixed frame, and the hinge blocks are hinged to the hinge seats; the upper portion of the auxiliary ladder is slidably arranged in the sliding pipe. When a vehicle owner needs to enter the roof of the motor home to load and unload articles, the bottom of the extension ladder is separated from the baffle, the auxiliary ladder slides to the ground, the main ladder and the auxiliary ladder form an inclined angle with the motor home, and the vehicle owner can enter the roof of the motor home only by holding the handrail frame and stepping on the cross rod A of the main ladder and the cross rod B of the auxiliary ladder. The main ladder and the auxiliary ladder form an inclined angle with the touring car, and compared with a vertical ladder of a traditional touring car, the touring car can effectively prevent a car owner from falling off and is more convenient to climb.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted boarding ladder technology, specifically a vehicle-mounted telescopic ladder. Background Technology

[0002] Some specialized work vehicles, RVs, and campervans are usually equipped with ladders to facilitate daily life. In the current technology, in order to reduce space occupation, RV roofs are generally used to place large items that take up space. The ladders are usually fixed and vertically fixed next to the rear cabin of the RV. When the owner is loading or unloading items on the RV roof, such vertical ladders are prone to backward falls, which poses a significant safety hazard. In addition, the bottom of the existing ladders is higher than the ground, and the owner has to climb, making it extremely inconvenient to get on and off the RV roof.

[0003] Therefore, we made improvements and proposed a vehicle-mounted telescopic ladder. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a vehicle-mounted telescopic ladder, which solves the problems of vehicle owners easily falling backward and having difficulty climbing the ladder when using the existing ladder.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a vehicle-mounted telescopic ladder, including a fixed frame, a telescopic ladder hinged to the inner cavity of the fixed frame, and the telescopic ladder being hinged to the upper part of the fixed frame;

[0006] The telescopic ladder includes a main ladder and an auxiliary ladder. The upper part of the main ladder is symmetrically provided with hinge blocks, and the upper part of the fixed frame is symmetrically provided with hinge seats. The hinge blocks and hinge seats are hinged together. The upper part of the back of the main ladder is symmetrically provided with sliding tubes, and the upper part of the auxiliary ladder is slidably provided in the sliding tubes.

[0007] As a preferred embodiment, the lower part of the fixed frame is provided with a baffle along its width direction, and the lower parts of the main ladder and the auxiliary ladder are located on the upper part of the baffle.

[0008] As a preferred embodiment, handrails are provided on both sides of the main ladder along its length.

[0009] As a preferred embodiment, the head of the auxiliary ladder is symmetrically provided with stops, which can prevent the head of the auxiliary ladder from disengaging from the sliding tube.

[0010] As a preferred embodiment, the main ladder includes vertical bars A and horizontal bars A. There are two vertical bars A, which are longitudinally symmetrical. There are multiple horizontal bars A, which are uniformly and laterally fixed between the two vertical bars A.

[0011] As a preferred embodiment, the hinge block is fixedly mounted on the back of the head of the vertical rod A.

[0012] As a preferred embodiment, the auxiliary ladder includes two vertical bars B and two horizontal bars B. The two vertical bars B are longitudinally symmetrical, and there are multiple horizontal bars B. The multiple horizontal bars B are evenly and laterally fixed in the lower part of the inner cavity formed by the two vertical bars B.

[0013] As a preferred embodiment, the crossbar B is located at the lower part of the sliding tube.

[0014] As a preferred embodiment, the fixing frame includes mounting plates and connecting rods. There are two mounting plates arranged symmetrically, and two connecting rods arranged symmetrically. The ends of the connecting rods are fixedly connected to the ends of the two mounting plates.

[0015] This utility model has the following beneficial effects:

[0016] The mounting plate is fixed to the side of the rear door of the RV. When the owner needs to climb onto the roof of the RV to load or unload items, the bottom of the telescopic ladder is detached from the baffle, and the auxiliary ladder slides down to the ground. The main ladder and auxiliary ladder form an inclined angle with the RV. The owner only needs to hold the handrail and step on the crossbar A of the main ladder and the crossbar B of the auxiliary ladder to enter the roof of the RV. The inclined angle between the main ladder and auxiliary ladder and the RV effectively prevents the owner from falling and makes climbing easier compared to the vertical ladder of traditional RVs.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a vehicle-mounted telescopic ladder according to the present invention;

[0019] Figure 2 This is a schematic diagram of the fixing frame structure of a vehicle-mounted telescopic ladder according to the present invention;

[0020] Figure 3 This is a schematic diagram of the telescopic ladder structure of a vehicle-mounted telescopic ladder according to the present invention;

[0021] In the diagram, 1. Fixed frame; 2. Telescopic ladder; 3. Main ladder; 4. Secondary ladder; 5. Hinge block; 6. Hinge seat; 7. Sliding tube; 8. Baffle; 9. Handrail; 10. Stop block; 11. Vertical bar A; 12. Horizontal bar A; 13. Vertical bar B; 14. Horizontal bar B; 15. Mounting plate; 16. Connecting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Please refer to the examples. Figures 1 to 3 This utility model embodiment provides a technical solution: a vehicle-mounted telescopic ladder, including a fixed frame 1, a telescopic ladder 2 hinged to the inner cavity of the fixed frame 1, and the telescopic ladder 2 is hinged to the upper part of the fixed frame 1.

[0025] The telescopic ladder 2 includes a main ladder 3 and an auxiliary ladder 4. The upper part of the main ladder 3 is symmetrically provided with hinge blocks 5, and the upper part of the fixed frame 1 is symmetrically provided with hinge seats 6. The hinge blocks 5 and the hinge seats 6 are hinged together. The upper part of the back of the main ladder 3 is symmetrically provided with sliding tubes 7, and the upper part of the auxiliary ladder 4 is slidably provided in the sliding tubes 7.

[0026] The lower part of the fixed frame 1 is provided with a baffle 8 along its width direction, and the lower parts of the main ladder 3 and the auxiliary ladder 4 are provided on the upper part of the baffle 8.

[0027] The main ladder 3 has handrails 9 on both sides along its length.

[0028] The head of the auxiliary ladder 4 is symmetrically provided with a stop block 10, which can prevent the head of the auxiliary ladder 4 from disengaging from the sliding tube 7.

[0029] The main ladder 3 includes vertical bars A11 and horizontal bars A12. There are two vertical bars A11, which are longitudinally symmetrical. There are multiple horizontal bars A12, which are evenly and laterally fixed between the two vertical bars A11.

[0030] The hinge block 5 is fixedly installed on the back of the head of the vertical rod A11.

[0031] The auxiliary ladder 4 includes vertical bars B13 and horizontal bars B14. There are two vertical bars B13, which are longitudinally symmetrical. There are multiple horizontal bars B14, which are uniformly and laterally fixed in the lower part of the inner cavity formed by the two vertical bars B13.

[0032] The crossbar B14 is located at the lower part of the sliding tube 7.

[0033] The fixed frame 1 includes a mounting plate 15 and a connecting rod 16. There are two mounting plates 15, which are symmetrically arranged. There are two connecting rods 16, which are symmetrically arranged. The ends of the connecting rods 16 are fixedly connected to the ends of the two mounting plates 15.

[0034] The working principle of this utility model:

[0035] Mounting plate 15 is fixed to the side of the rear door of the RV. When the owner needs to climb the roof of the RV to load or unload items, the bottom of the telescopic ladder 2 is detached from the baffle 8, and the auxiliary ladder 4 slides down to the ground. The main ladder 3 and the auxiliary ladder 4 form an inclined angle with the RV. The owner only needs to hold the handrail 9 and step on the crossbar A12 of the main ladder 3 and the crossbar B14 of the auxiliary ladder 4 to enter the roof of the RV. The main ladder 3 and the auxiliary ladder 4 form an inclined angle with the RV, which can effectively prevent the owner from falling and make climbing more convenient compared to the vertical ladder of traditional RVs.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vehicle-mounted telescopic ladder, characterized in that: Includes a fixed frame (1), and a telescopic ladder (2) is hinged to the inner cavity of the fixed frame (1). The telescopic ladder (2) is hinged to the upper part of the fixed frame (1). The telescopic ladder (2) includes a main ladder (3) and an auxiliary ladder (4). The upper part of the main ladder (3) is symmetrically provided with hinge blocks (5), and the upper part of the fixed frame (1) is symmetrically provided with hinge seats (6). The hinge blocks (5) and the hinge seats (6) are hinged together. The upper part of the back of the main ladder (3) is symmetrically provided with sliding tubes (7), and the upper part of the auxiliary ladder (4) is slidably provided in the sliding tubes (7).

2. The vehicle-mounted telescopic ladder according to claim 1, characterized in that: The lower part of the fixed frame (1) is provided with a baffle (8) along its width direction, and the lower parts of the main ladder (3) and the auxiliary ladder (4) are provided on the upper part of the baffle (8).

3. The vehicle-mounted telescopic ladder according to claim 1, characterized in that: The main ladder (3) is provided with handrails (9) on both sides along its length.

4. The vehicle-mounted telescopic ladder according to claim 1, characterized in that: The head of the auxiliary ladder (4) is symmetrically provided with a stop (10), which can prevent the head of the auxiliary ladder (4) from disengaging from the sliding tube (7).

5. A vehicle-mounted telescopic ladder according to claim 1, characterized in that: The main ladder (3) includes vertical rods A (11) and horizontal rods A (12). There are two vertical rods A (11), which are longitudinally symmetrical. There are multiple horizontal rods A (12), which are uniformly and horizontally fixed between the two vertical rods A (11).

6. A vehicle-mounted telescopic ladder according to claim 5, characterized in that: The hinge block (5) is fixedly installed on the back of the head of the vertical rod A (11).

7. A vehicle-mounted telescopic ladder according to claim 1, characterized in that: The auxiliary ladder (4) includes vertical rods B (13) and horizontal rods B (14). There are two vertical rods B (13), which are longitudinally symmetrical. There are multiple horizontal rods B (14), which are uniformly and horizontally fixed in the lower part of the inner cavity formed by the two vertical rods B (13).

8. A vehicle-mounted telescopic ladder according to claim 7, characterized in that: The crossbar B (14) is located at the lower part of the sliding tube (7).

9. A vehicle-mounted telescopic ladder according to claim 1, characterized in that: The fixed frame (1) includes a mounting plate (15) and a connecting rod (16). There are two mounting plates (15) arranged symmetrically. There are two connecting rods (16) arranged symmetrically. The ends of the connecting rods (16) are fixedly connected to the ends of the two mounting plates (15).