Movable boarding ladder device for trailer

Abstract

The utility model relates to the technical field of trailer boarding devices, in particular to a movable boarding ladder device for a trailer, which comprises a platform arranged above tires of a rear axle group of a train, a slide rail frame arranged below the platform, and a boarding ladder assembly arranged on the slide rail frame and sliding along the slide rail frame. The boarding ladder assembly comprises a step frame, and a sliding bearing for driving the step frame to slide on the sliding rail frame is arranged on one side of the step frame; an inner side limiting plate is arranged at the rear end of the sliding rail frame, and the upper end of the inner side limiting plate is connected with the bottom of the platform. And a bearing limiting plate for limiting the sliding bearing from sliding out is arranged at the front end of the sliding rail frame. The platform with the telescopic folding ladder stand is mounted by utilizing the limited space above the trailer shaft group, so that the problems that a driver is strenuous and unsafe to operate the platform up and down are effectively solved, and the convenience and the safety of operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer boarding devices, and particularly relates to a movable boarding ladder device for trailers. Background Art

[0002] As an efficient and heavy-duty transportation tool, the double-trailer articulated train plays an important role in the modern logistics and transportation fields. The structural feature of this type of train is that its B-trailer part is usually connected to the rear axle group (which may be a two-axle group or a three-axle group) of the A-trailer. Such a design helps to optimize the load distribution and shorten the total length of the train, thereby improving the driving stability and better passing performance. However, during actual operation and maintenance, when the driver needs to operate, install and remove the electrical circuit spiral connectors above the frame of the A-trailer part or perform necessary maintenance work, that is, it is necessary to reach the position of the electrical connection operation platform (1) as shown in the appendix. Figure 1 Shown in the figure of the electrical connection operation platform (1).

[0003] Since both sides of the frame of the double-trailer articulated train are tightly surrounded by tires, and there is no direct installation space between the tires to set up a traditional boarding device, this brings great inconvenience to the driver's getting on and off the vehicle. At present, drivers generally adopt a simple and dangerous method to complete this task: they have to step on the steel rim of the tire and climb over to reach above the frame. This method is not only laborious and time-consuming, which is a great test of the driver's physical strength, but more importantly, it has serious safety hazards. The surface of the tire steel rim is smooth and lacks sufficient support points. If care is not taken, it is likely to slip or fall, posing a serious threat to the driver's personal safety.

[0004] Therefore, in order to solve the problems that it is difficult for the driver to get on and off the vehicle conveniently and safely when performing electrical circuit installation or maintenance on the existing double-trailer articulated train, now it is necessary to provide a movable boarding ladder device for trailers. Content of the Utility Model

[0005] The utility model aims to provide a movable boarding ladder device for trailers, which utilizes the limited space above the rear axle group tires to design a platform with a retractable and foldable ladder hidden inside, ensuring the convenience and safety of the driver getting on and off the operation platform.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] Based on the structure of the existing double - hung articulated train, the utility model ingeniously utilizes the limited space above the rear axle group tires to design a new type of boarding ladder device that not only meets the actual operation requirements but also ensures the safety of the driver, so as to ensure the safety and convenience of the driver getting on and off the operating platform. Specifically, it provides a movable boarding ladder device for a trailer, including a platform arranged above the rear axle group tires of the train. A slide rail frame is arranged below the platform, and a boarding ladder assembly that slides along the slide rail frame is arranged on the slide rail frame; the boarding ladder assembly includes a step frame, and a sliding bearing for driving the step frame to slide on the slide rail frame is arranged on one side of the step frame; an inner limiting plate is arranged at the rear end of the slide rail frame, and the upper end of the inner limiting plate is connected to the bottom of the platform; a bearing limiting plate for limiting the sliding bearing from sliding out is arranged at the front end of the slide rail frame.

[0008] The principle and advantages of this solution are as follows:

[0009] Under normal conditions, the space of the rear axle group of the trailer is limited, making it difficult to accommodate the installation operation of a conventional boarding ladder. Moreover, both sides of the vehicle frame are tightly surrounded by tires. In this case, other components such as mudguards need to be installed on the tires, resulting in even less effective space on the vehicle body. However, in this solution, within the effective space, by utilizing the limited space position above the rear axle group tires, a platform with a built - in movable telescopic and folding ladder is designed and mounted on the mudguard, thus solving the problem that it is inconvenient for the driver to get on and off the operating platform, which brings potential safety hazards, and improving the convenience and safety of operation.

[0010] Furthermore, the platform is of an arch structure. The left side of the platform panel is an installation frame, and the installation frame is arranged at one end of the mudguard of train A, so that the platform is arranged at the lower end of the mudguard through the installation frame. By using the existing mudguard structure as a support, the boarding ladder platform is ingeniously and stably arranged on one side of the vehicle frame, ensuring the safety and reliability of the boarding ladder.

[0011] Furthermore, the platform is 700 - 750 mm in length, 150 - 300 mm in width, and 120 - 200 mm in height. In order to utilize the limited space, it can not only meet the operation requirements of getting on and off the vehicle but also ensure safety, making full use of the existing effective space.

[0012] Furthermore, a locking hole is arranged on one side of the step frame, and a wing nut for fixing the step frame is arranged outside the locking hole. This is convenient for the convenient storage of the step frame and at the same time ensures the stability and safety during driving.

[0013] Furthermore, the step frame includes two oppositely arranged support rods and three footrests arranged between the support rods; the length of the support rods is 450 - 600 mm, and the width of the footrests is 120 - 220 mm. To ensure that the step frame can be hidden inside the platform, which is convenient for storage and use.

[0014] Furthermore, an outer limiting plate for positioning the tread frame is provided below the platform. When the tread frame is pulled out, the outer limiting plate positions the tread frame, so that the tread frame naturally hangs down to the designated position, ensuring the stability during the use of the tread frame and avoiding potential safety hazards caused by shaking.

[0015] Furthermore, the platform is a checkered plate platform. Further, the tread plate is a checkered plate tread plate. This gives the platform an anti-slip effect and improves the safety and stability during use.

[0016] Furthermore, a handle for support is provided on the outer side of the fender. It provides a support point for the driver to get on and off the operating platform, making it more convenient for getting on and off the vehicle, and also enhancing safety.

[0017] Furthermore, an observation hole is provided on the platform, and the observation hole is arranged above the wing nut. It is convenient for observing during locking, and can also drain the accumulated water or debris on the platform, reducing the safety influencing factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an active boarding ladder device for a trailer of the present utility model installed on a vehicle body;

[0019] Figure 2 is a schematic structural diagram of a state I of the active boarding ladder device for a trailer of the present utility model in a stored state;

[0020] Figure 3 is a schematic structural diagram of a platform of an active boarding ladder device for a trailer of the present utility model;

[0021] Figure 4 is a schematic structural diagram of a boarding ladder assembly of an active boarding ladder device for a trailer of the present utility model;

[0022] Figure 5 is a schematic structural diagram of a state II of the active boarding ladder device for a trailer of the present utility model in a stored state;

[0023] Figure 6 is a schematic structural diagram of an active boarding ladder device for a trailer of the present utility model in a use state when installed on a vehicle body;

[0024] Figure 7 is Figure 6 a partial enlarged view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following is further detailed through specific embodiments:

[0026] The reference numerals in the accompanying drawings of the specification include: electrical connection operation console 1, A-hanging part 2, B-hanging part 3, fender 4, platform 5, mounting bracket 6, handle 7, baffle 8, slide rail bracket 9, platform panel 10, step bracket 11, sliding bearing 12, support rod 13, footrest 14, anti-slip protrusion 15, observation hole 16, locking hole 17, wing nut 18, inner limiting plate 19, bearing limiting plate 20, outer limiting plate 21, support plate 22.

[0027] The embodiment is basically as shown in the attached Figure 1 figures: A movable boarding ladder device for a trailer uses the limited space above the trailer axle group to install a retractable and foldable ladder device that can be hidden inside, facilitating the driver or maintenance personnel to get on and off the operation console for installation or maintenance. In this embodiment, as shown in the attached Figure 1 figures, the double-trailer articulated train includes an A-hanging part 2 and a B-hanging part 3. Among them, the upper part of the A-trailer frame is the A-section carriage, and the upper part of the B-trailer is the B-section carriage, and the two are hinged through a connecting bridge. On both sides of the frame are closely arranged tires. When a general driver or operator needs to install or maintain the electrical circuit spiral joint, they need to climb to the position of the electrical connection operation console 1 to operate. And because there is also a fender 4 installed above the tires, the space in this part is very limited. The driver can only step on the tire rim and then climb over to get on and off the operation console, resulting in time-consuming, laborious and very unsafe getting on and off.

[0028] The solution lies in cleverly using the structure of the fender 4 and the limited space above the rear axle group tires to design a retractable boarding ladder device. As shown in the attached Figure 1 and the attached Figure 2 figures, it includes a platform 5 provided above the rear axle group tires of the train. In this embodiment, as shown in the attached Figure 3 figures, the platform 5 is integrally in an arch structure. On the left side of the platform panel 10 is a vertically arranged mounting bracket 6. The upper end of the mounting bracket 6 is fixedly connected to one end of the fender 4 of the A-hanging part 2 of the train through bolts, so that the platform is arranged at the lower end of the fender 4 through the mounting bracket 6, leaving the activity space above the platform 5 and ensuring the stability and safety of the platform 5. In this embodiment, to ensure both the operability requirements and safety requirements of the platform 5, the overall length of the platform 5 is set to 700 - 750 mm, the width is 150 - 300 mm, and the height is 120 - 200 mm, enabling it to support the driver getting on and off in a limited space. In this embodiment, the platform 5 is made of a pattern plate platform to improve the anti-slip effect. An observation hole 16 is also opened on the platform 5, specifically arranged on the platform panel 10. Through the observation hole 16, it is convenient to observe the locking state to ensure that the storage is in place. At the same time, it can also drain the accumulated water or sundries on the platform to achieve the effects of anti-slip and drainage and sewage discharge, improving the use safety. At the same time, in combination with the attached Figure 1As shown in the figure, for the convenience of operation and support, a handle 7 for holding is also welded on the outer side of the fender 4 to ensure the safety of the driver.

[0029] As shown in the attached Figure 3 figure, a baffle 8 is integrally formed on one side of the bottom of the platform 5. Combining with the attached Figure 2 figure, a slide rail frame 9 is arranged on the baffle 8. That is, the baffle 8, the platform panel 10, and the mounting frame 6 make the whole platform 5 similar to an arch shape. One side of the slide rail frame 9 can be installed on the baffle 8 on one side of the bottom of the platform, and the other side of the slide rail frame 9 is installed on the other side of the platform panel 10 through a welding plate, thus forming the slide rail frame 9, which can further ensure the stability and safety of the slide rail frame 9. A boarding ladder assembly that slides along the slide rail frame 9 is movably arranged on the slide rail frame 9.

[0030] As shown in the attached Figure 4 figure, the boarding ladder assembly includes a step frame 11, and a sliding bearing 12 that drives the step frame 11 to slide on the slide rail frame 9 is installed on one side of the step frame 11. In this embodiment, the step frame 11 includes two relatively arranged support rods 13 and three footrests 14 arranged between the support rods 13. In this embodiment, to ensure that the boarding ladder assembly can be stored under the platform, the length of the support rod 13 is set to 450 - 600 mm, the width of the footrest 14 is set to 120 - 220 mm, and the footrest 14 is made of patterned plate to increase the anti-slip effect and ensure the operation requirements and safety requirements. A locking hole 17 is also opened on the other side of the step frame 11, that is, a locking hole 17 is opened at the end of the support rod 13 located on the outer side, and the other end is used to install the sliding bearing 12. A wing nut 18 for fixing the step frame 11 is movably arranged on the locking hole 17, so that the observation hole 16 is located above the wing nut 18, thereby ensuring that the step frame 11 can be stored and locked in place.

[0031] An inner limiting plate 19 is also welded at the rear end of the slide rail frame 9. The upper end of the inner limiting plate 19 is connected to the bottom of the platform 5, so as to limit the boarding ladder assembly from the rear end. A bearing limiting plate 20 for limiting the sliding bearing 12 from sliding out is welded at the front end of the slide rail frame 9. In this embodiment, the bearing limiting plates 20 are respectively welded on both sides of the front end of the slide rail frame 9 to respectively limit the sliding bearings 12 on the left and right sides to prevent the sliding bearings 12 from sliding out of the track.

[0032] As shown in the attached Figure 5 figure, an outer limiting plate 21 for positioning the step frame 11 is also welded under the platform 5. When the step frame 11 is pulled out, it can be naturally placed at the front end of the outer limiting plate 21 to form a fixed support function and ensure the stability and safety of the step frame 11. At the same time, a support plate 22 is also arranged under the platform 5 to strengthen the stability of the platform 5.

[0033] The specific implementation process is as follows:

[0034] As shown in the appendix Figure 1 to the appendix Figure 7 As shown, when the boarding ladder device is in the storage state, the platform 5 can directly function as the mudguard of the A hitch. When the driver needs to connect the air and electrical circuits at the electrical connection operation console 1 of the A hitch, first remove the wing nut 18 and pull out the tread frame 11, so that the sliding bearing 12 slides to the bearing limit plate 20 and naturally hangs down to the outer limit plate 21, making the boarding ladder present the open state as shown in the appendix Figure 6 As shown. The driver can then safely board the vehicle to the electrical connection operation console 1. When the driver has completed the operation and safely returns to the ground, retract the tread frame 11, slide it into the lower rail frame 9 of the platform 5 to the inner limit plate 19, and lock it with the wing nut 18 (or spring pin) to prevent the boarding ladder from moving around, ensuring safety during the trailer's travel.

[0035] In this embodiment, by utilizing the limited space position above the rear axle group tires between the A hitch and the B hitch, a platform with a built-in movable, telescopic and foldable ladder is designed on the mudguard, thus solving the problem that it is inconvenient for the driver to get on and off the operation console, and the resulting potential safety hazards, and improving the convenience and safety of operation.

[0036] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. An active boarding ladder device for a trailer, characterized in that: It includes a platform provided above the rear axle group tires of the train. A slide rail frame is provided below the platform, and an embarking ladder assembly that slides along the slide rail frame is provided on the slide rail frame; the embarking ladder assembly includes a tread frame, and a sliding bearing for driving the tread frame to slide on the slide rail frame is provided on one side of the tread frame; an inner limit plate is provided at the rear end of the slide rail frame, and the upper end of the inner limit plate is connected to the bottom of the platform; a bearing limit plate for limiting the sliding bearing from sliding out is provided at the front end of the slide rail frame.

2. The movable boarding ladder device for a trailer according to claim 1, characterized in that: The platform is of an arch structure. The left side of the platform panel is a mounting rack, and the mounting rack is provided at one end of the fender of Train A, so that the platform is provided at the lower end of the fender through the mounting rack.

3. The movable boarding ladder device for a trailer according to claim 1, wherein: The platform is 700 - 750 mm in length, 150 - 300 mm in width, and 120 - 200 mm in height.

4. The movable boarding ladder device for a trailer according to claim 1, characterized in that: A locking hole is provided on the other side of the tread frame, and a wing nut for fixing the tread frame is provided outside the locking hole.

5. The movable boarding ladder device for a trailer according to claim 1, characterized in that: The tread frame includes two oppositely arranged support rods and three footrests provided between the support rods; the length of the support rods is 450 - 600 mm, and the width of the footrests is 120 - 220 mm.

6. The movable boarding ladder device for a trailer according to claim 1, wherein: An outer limit plate for positioning the tread frame is also provided below the platform.

7. The movable boarding ladder device for a trailer according to claim 1, characterized in that: The platform is a checkered plate platform.

8. The movable boarding ladder device for a trailer according to claim 5, wherein: The footrests are checkered plate footrests.

9. The movable boarding ladder device for a trailer according to claim 2, wherein: A handle for support is also provided outside the fender.

10. The movable boarding ladder device for a trailer according to claim 4, characterized in that: An observation hole is also provided on the platform, and the observation hole is provided above the wing nut.

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