Novel light-weight drawing folding boarding ladder

Abstract

The utility model discloses a novel lightweight drawing folding boarding ladder which comprises a pedal unit and slide way units, the pedal unit comprises an upper pedal and a lower pedal, and the slide way units are arranged on the two sides of the upper pedal; a fixing mechanism is arranged at the bottom of the upper pedal, and the upper pedal and the lower pedal are connected through a folding mechanism. The folding mechanism comprises fixing plates, rhombic connecting plates, strip-shaped connecting plates and rhombic panels which are symmetrically arranged; the rhombic connecting plate and the strip-shaped connecting plate rotate around the fixing plate, and when the folding mechanism reaches the maximum unfolding angle, the connecting position of the rhombic panel and the strip-shaped connecting plate abuts against one side of the rhombic connecting plate to be used for fixing. The novel light-weight drawing folding boarding ladder provided by the utility model can avoid influencing the departure angle of a vehicle, can provide a spacious and stable pedal so as to improve the man-machine engineering property, and is suitable for small vehicles.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle boarding ladders, in particular to a novel lightweight drawable and foldable vehicle boarding ladder. Background Art

[0002] In current vehicle design, some special-purpose vehicles, such as communications vehicles and military transport vehicles, have high chassis, requiring personnel to access the vehicle using a ladder. The design of the ladder is directly related to the practicality of the vehicle and the convenience of the operator.

[0003] Traditional communication vehicle boarding ladders are mainly divided into two categories: fixed structures and pull-out structures. Although fixed-structure boarding ladders are structurally stable, their non-adjustable fixed form often easily affects the vehicle's departure angle. The departure angle is an important parameter for measuring vehicle passability. Its reduction can easily cause chassis scratches when the vehicle goes up and down slopes or overcomes obstacles, affecting the vehicle's safety and scope of use. Pull-out boarding ladders are further divided into boarding ladders that fall to the ground after being pulled out and boarding ladders that do not fall to the ground after being pulled out. Although the boarding ladders that fall to the ground after being pulled out are long enough, their longer extension length requires a high installation space and are not suitable for small vehicles. Although the boarding ladders that do not fall to the ground after being pulled out save space, their pedal width is limited and their ergonomics are poor. Operators face inconvenience when getting on and off the vehicle, especially when carrying equipment or in emergency situations, which increases the difficulty of operation and safety risks. Utility Model Content

[0004] In view of the above-mentioned deficiencies of current boarding ladders, the utility model provides a new lightweight retractable and foldable boarding ladder, which can avoid affecting the departure angle of the vehicle and provide a spacious and stable pedal to improve ergonomics, and is suitable for use in small vehicles.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present invention adopt the following technical solutions:

[0006] The folding mechanism is connected to the sliding panel and the sliding panel also is a plurality of connecting members, each of which is connected to the sliding panel when the folding mechanism is turned on and off.

[0007] In one embodiment, the fixing mechanism includes a rear connecting plate, a left connecting plate, a front connecting plate and a right connecting plate, and the rear connecting plate, the left connecting plate, the front connecting plate and the right connecting plate are sequentially connected around the bottom of the upper pedal.

[0008] In one embodiment, the slide unit includes a left slide connecting plate and a right slide connecting plate, the outer side of the left slide connecting plate is provided with a left slide that is matched and connected thereto, and the outer side of the right slide connecting plate is provided with a right slide that is matched and connected thereto; the left connecting plate and the right connecting plate of the fixing mechanism are fixedly connected to the left slide connecting plate and the right slide connecting plate respectively.

[0009] In one embodiment, the left slide is connected to the left slide connecting plate via a left spring latch, and the right slide is connected to the right slide connecting plate via a right spring latch.

[0010] In one embodiment, rollers are provided inside the left slide connecting plate and the right slide connecting plate, and vehicle body connecting plates are provided on the outer sides of the left slide and the right slide, and the boarding ladder is fixed to the vehicle body through the vehicle body connecting plates.

[0011] In one embodiment, a slideway upper limit plate is provided on the top of the upper pedal, and a transverse reinforcement steel and a longitudinal reinforcement steel are provided on the bottom of the upper pedal.

[0012] In one embodiment, a front panel extending vertically downward is provided on the front side of the upper pedal, and a handle is provided on the front panel.

[0013] In one embodiment, the fixing plate is provided with a limiting pin for limiting the diamond-shaped connecting plate.

[0014] In one embodiment, a first connecting rod is provided between the symmetrically arranged strip-shaped connecting plates; and a second connecting rod is provided between the symmetrically arranged diamond-shaped panels.

[0015] The beneficial effect of the present utility model is that it provides a new type of lightweight pull-out folding boarding ladder, including a pedal unit, a slide unit and a folding mechanism. The boarding ladder pedal is made of carbon fiber material, which has the advantages of light weight, high strength and corrosion resistance. Compared with the boarding ladder made of traditional metal materials, the boarding ladder of this device has good structural strength and durability while reducing weight; the slide unit is arranged on both sides of the pedal unit, and the boarding ladder can be pulled back and forth on the vehicle body, which is convenient for operators to get on and off the vehicle at different positions; the folding mechanism includes symmetrically arranged fixed plates, diamond connecting plates, strip connecting plates and diamond panels, and uses two-stage pedals to meet the needs of people getting on and off. When the boarding ladder is not in use, it is folded to reduce the occupied space and facilitate storage and transportation; the surface of the diamond panel is provided with anti-slip grooves or anti-slip pads, which improves the safety of people during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of the novel lightweight retractable folding boarding ladder described in the present utility model;

[0018] Figure 2 This is a structural diagram of the fixing structure of the present utility model;

[0019] Figure 3 This is a structural diagram of the slide unit described in the present utility model;

[0020] Figure 4 This is a schematic diagram of the folded state of the novel lightweight drawer-foldable boarding ladder described in the present utility model;

[0021] Figure 5 This is a schematic diagram of the unfolded state of the novel lightweight pull-out folding boarding ladder described in the present utility model.

[0022] The accompanying drawings are marked as follows: 1. Upper pedal; 11. Lower pedal; 12. Horizontal reinforcement steel; 13. Longitudinal reinforcement steel; 14. Front panel; 15. Handle; 2. Fixed plate; 21. Diamond connecting plate; 22. Strip connecting plate; 23. Diamond panel; 3. Rear connecting plate; 31. Left connecting plate; 32. Front connecting plate; 33. Right connecting plate; 4. Left slide connecting plate; 41. Left slide; 42. Right slide; 43. Slide upper limit plate; 5. Left spring latch; 6. Roller; 7. Vehicle body connecting plate; 8. Limit latch; 9. First connecting rod; 10. Second connecting rod. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0024] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features qualified as "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the novel lightweight retractable and foldable boarding ladder provided in this embodiment includes a pedal unit, a slide unit and a folding mechanism.

[0028] In actual application, the pedal unit includes an upper pedal 1 and a lower pedal 11, and the slide unit is arranged on both sides of the upper pedal 1. A fixing mechanism is provided at the bottom of the upper pedal 1, and the upper pedal 1 and the lower pedal 11 are connected by a folding mechanism. Among them, the fixing mechanism includes a rear connecting plate 3, a left connecting plate 31, a front connecting plate 32 and a right connecting plate 33. The rear connecting plate 3, the left connecting plate 31, the front connecting plate 32 and the right connecting plate 33 are sequentially connected around the bottom of the upper pedal 1. These connecting plates are fixed by welding or bolting to form an integral frame for supporting the upper pedal 1. In order to increase the structural strength of the upper pedal 1, a transverse reinforcing steel 12 and a longitudinal reinforcing steel 13 are also provided at the bottom of the upper pedal 1.

[0029] A front panel 14 extending vertically downward is further provided on the front side of the upper step 1 , and a handle 15 is provided on the front panel 14 for people to pull in and out the boarding ladder.

[0030] In practice, the slide unit includes a left slide connecting plate 4 and a right slide connecting plate, which are fixedly connected to the left connecting plate 31 and right connecting plate 33 of the fixing mechanism, respectively. A left slide 41 is provided on the outer side of the left slide connecting plate 4, and a right slide 42 is provided on the outer side of the right slide connecting plate. The left slide 41 is connected to the left slide connecting plate 4 via a left spring latch 5, while the right slide 42 is connected to the right slide connecting plate via a right spring latch, enabling the slides to be removable and adjustable.

[0031] The left and right slideway connecting plates 4 and 42 are both provided with rollers 6 to facilitate the forward and backward movement of the upper step 1 of the boarding ladder on the vehicle body. The outer sides of the left and right slideways 41 and 42 are both provided with vehicle body connecting plates 7 for fixing the boarding ladder to the vehicle body.

[0032] In addition, a slide limit plate 43 is installed on the top of the upper step 1, and a limit block is installed on the rear connecting plate 3 to limit the forward and backward movement of the slide unit. The boarding ladder is fixed to the vehicle body via the vehicle body connecting plate 7. The left and right slides 41 and 42 are fixed. The operator pulls the boarding ladder using the handle 15, which drives the left and right slide connecting plates 4 and 33 to slide within the slides, realizing the extension and extension function of the upper step 1 unit.

[0033] In actual use, the folding mechanism includes a symmetrically arranged fixed plate 2, a diamond-shaped connecting plate 21, a strip connecting plate 22, and a diamond-shaped panel 23. The fixed plate 2 is connected to the left connecting plate 31 and the right connecting plate 33 of the fixed mechanism. The lower end of the fixed plate 2 is rotatably connected to the diamond-shaped connecting plate 21 and the strip connecting plate 22 on both sides. The other end of the diamond-shaped connecting plate 21 and the other end of the strip connecting plate 22 are both rotatably connected to the diamond-shaped panel 23, forming a folding mechanism. When the boarding ladder needs to be unfolded, the diamond-shaped connecting plate 21 and the strip connecting plate 22 rotate around the fixed plate 2. When the folding mechanism reaches the maximum unfolding angle, the connection between the diamond-shaped panel 23 and the strip connecting plate 22 abuts against one side of the diamond connecting plate 21 for fixation. In order to maintain the stability of the unfolded state, the fixed plate 2 is also provided with a limit pin 8 for limiting the diamond connecting plate 21. When the boarding ladder needs to be folded, the diamond connecting plate 21 and the strip connecting plate 22 rotate upward around the fixed plate 2, and the lower pedal 11 is fixedly connected between the diamond panels 23 on both sides. The lower pedal 11 always remains parallel or nearly parallel to the upper pedal 1, thereby reducing the space occupied by the boarding ladder.

[0034] In practice, a first connecting rod 9 is positioned between the symmetrically arranged strip connecting plates 22, and a second connecting rod 10 is positioned between the symmetrically arranged diamond-shaped panels 23, to enhance the structural stability of the boarding ladder in both the unfolded and folded positions. The upper and lower steps 11 also feature anti-slip patterns, such as those of crocodile teeth, to enhance user safety. Both the upper and lower steps 11 are constructed of carbon fiber for a lightweight design.

[0035] In this embodiment, the rollers 6 of the slide unit are made of a self-lubricating material, such as polytetrafluoroethylene, to reduce friction and wear during rolling. Bearings are also provided on the axles of the rollers 6 to enhance rolling flexibility and stability. Furthermore, the slide unit's vehicle body connection plate 7 is provided with adjustment holes for adjusting the slide unit's mounting position on the vehicle body to accommodate different vehicle models and body requirements.

[0036] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of the present invention patent.

[0037] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are omitted in this application document. Ordinary technicians in this field should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. A new type of lightweight pull-out folding boarding ladder, characterized by: The invention comprises a pedal unit and a slide unit, wherein the pedal unit comprises an upper pedal (1) and a lower pedal (11), and the slide unit is arranged on both sides of the upper pedal (1); a fixing mechanism is provided at the bottom of the upper pedal (1), and the upper pedal (1) and the lower pedal (11) are connected by a folding mechanism; the folding mechanism comprises a symmetrically arranged fixing plate (2), a diamond-shaped connecting plate (21), a strip-shaped connecting plate (22) and a diamond-shaped panel (23); the fixing plate (2) is connected to both sides of the fixing mechanism, and the lower ends of the fixing plate (2) are rotatably connected to the diamond-shaped panel (23). The invention relates to a diamond-shaped connecting plate (21) and a strip-shaped connecting plate (22), wherein the other end of the diamond-shaped connecting plate (21) and the other end of the strip-shaped connecting plate (22) are both rotatably connected to the diamond-shaped panel (23), and the lower pedal (11) is fixedly connected between the diamond-shaped panels (23); the diamond-shaped connecting plate (21) and the strip-shaped connecting plate (22) rotate around the fixed plate (2), and when the folding mechanism reaches the maximum unfolding angle, the connection between the diamond-shaped panel (23) and the strip-shaped connecting plate (22) abuts against one side of the diamond-shaped connecting plate (21) for fixation.

2. The novel lightweight retractable folding boarding ladder according to claim 1 is characterized in that: The fixing mechanism comprises a rear connecting plate (3), a left connecting plate (31), a front connecting plate (32) and a right connecting plate (33); the rear connecting plate (3), the left connecting plate (31), the front connecting plate (32) and the right connecting plate (33) are sequentially connected to the periphery of the bottom of the upper pedal (1).

3. The novel lightweight retractable folding boarding ladder according to claim 2 is characterized in that: The slide unit comprises a left slide connecting plate (4) and a right slide connecting plate, the outer side of the left slide connecting plate (4) is provided with a left slide (41) matched with the left slide connecting plate, and the outer side of the right slide connecting plate is provided with a right slide (42) matched with the right slide connecting plate; the left connecting plate (31) and the right connecting plate (33) of the fixing mechanism are fixedly connected to the left slide connecting plate (4) and the right slide connecting plate, respectively.

4. The novel lightweight retractable folding boarding ladder according to claim 3 is characterized in that: The left slide (41) is connected to the left slide connecting plate (4) via a left spring latch (5), and the right slide (42) is connected to the right slide connecting plate via a right spring latch.

5. The novel lightweight retractable foldable boarding ladder according to claim 3 is characterized in that: Rollers (6) are provided inside the left slide connecting plate (4) and the right slide connecting plate, and vehicle body connecting plates (7) are provided on the outer sides of the left slide (41) and the right slide (42), and the boarding ladder is fixed to the vehicle body through the vehicle body connecting plates (7).

6. The novel lightweight retractable foldable boarding ladder according to claim 1 is characterized in that: The top of the upper pedal (1) is provided with a slideway upper limit plate (43), and the bottom of the upper pedal (1) is provided with a transverse reinforcement steel (12) and a longitudinal reinforcement steel (13).

7. The novel lightweight retractable foldable boarding ladder according to claim 1 is characterized in that: A front panel (14) extending vertically downward is provided on the front side of the upper pedal (1), and a handle (15) is provided on the front panel (14).

8. The novel lightweight retractable foldable boarding ladder according to claim 1 is characterized in that: The fixing plate (2) is provided with a limiting latch (8) for limiting the diamond-shaped connecting plate (21).

9. The novel lightweight retractable foldable boarding ladder according to claim 1 is characterized in that: A first connecting rod (9) is provided between the symmetrically arranged strip-shaped connecting plates (22); and a second connecting rod (10) is provided between the symmetrically arranged diamond-shaped panels (23).

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