Rear door or cover hinge embodiment for trailer

WO2026072020A3PCT designated stage Publication Date: 2026-05-21TIRSAN TREYLER SANAYI VE TICARET ANONIM SIRKETI
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TIRSAN TREYLER SANAYI VE TICARET ANONIM SIRKETI
Filing Date
2025-09-26
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Additive manufacturing of trailer and semi-trailer rear doors leads to structural weaknesses and increased labor costs due to microcracks and stress concentrations, particularly in hinge areas, and requires skilled labor for precise assembly.

Method used

A hinge embodiment with a monolithic profile, bearings, and shafts that allow the door to move internally without external mechanisms, enhancing structural integrity and simplifying assembly.

Benefits of technology

Enhances structural strength and reduces labor costs by minimizing microcracks and assembly errors, improving durability and efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the rear door or cover hinge embodiment for trailers. In particular, the present invention relates to the rear door or cover hinge embodiment located within the rear door assembly in trailer and semi-trailer type vehicles.
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Description

[0001] REAR DOOR OR COVER HINGE EMBODIMENT FOR TRAILER

[0002] Technical Field

[0003] The present invention relates to the rear door or cover hinge embodiment for trailers.

[0004] In particular, the present invention relates to the rear door or cover hinge embodiment located within the rear door assembly in trailer and semi-trailer type vehicles.

[0005] State of the Art

[0006] Trailer and semi-trailer type vehicles are carrier elements used in road transport, enabling loads to be carried by a towing vehicle. Trailers are a completely independent means of transport by being connected to the towing vehicle with a coupling system, while semi-trailers are transport units that leave part of the load on the towing vehicle and cannot stand without the towing vehicle. Semi-trailers are among the most commonly used vehicles in commercial transportation.

[0007] The rear doors of these vehicles serve a critical function for loading and unloading cargo. These doors, which generally operate with a hinge system, are designed for sealing, security and efficiency. Rear doors are frequently opened and closed as they are the main access point used during loading and unloading, so their durability is very important.

[0008] The use of additive manufacturing during the assembly of trailer and semi-trailer rear doors can create some difficulties, especially in terms of strength (durability). Since additive manufacturing is a layered manufacturing process, the interconnection of each layer plays a critical role. Internal microcracks or structural weaknesses may occur between these layers, especially between parts under mechanical load. This can reduce the overall strength of the door and jeopardize its long-term durability.

[0009] Rear doors installed with such methods may be more prone to deformation under high stress. Parts that are constantly moving or working under stress, especially hinge points and locking mechanisms, can be weaker when produced with this method. In the case of rear door hinges, the stress applied to various parts of the door (e.g., hinge areas or lock connections) can be concentrated in weak areas, causing cracks and breaks.

[0010] Another important challenge during the installation of rear doors is labor costs. While additive manufacturing speeds up the production process, it requires high precision in the assembly process. Manual adjustments to ensure proper fit and proper assembly of parts can increase labor time. Additionally, correcting errors that may occur during assembly of parts requires more labor, which can increase costs. In addition, the fact that this assembly method requires a trained workforce is another factor that increases costs.

[0011] As a result of the research made on the subject, US20170361880A1 is encountered. It is seen that the hinges of the trailer rear covers in the relevant application are mounted to the vehicle with screw connections. This situation causes the negative effects mentioned above to occur.

[0012] As a result, due to the abovementioned disadvantages and the insufficiency of the current solutions regarding the subject matter, a development is required to be made in the relevant technical field.

[0013] Object of the Invention

[0014] The present invention aims to solve the above-mentioned drawbacks, and it is inspired by the current situation

[0015] In particular, the present invention aims to eliminate strength problems that are especially critical for units operating under intense mechanical stress, such as rear doors. The layered structure of additive manufacturing and its tendency to microcracks can minimize such stress concentrations.

[0016] The modular design of the parts in the invention accelerates the production and assembly processes and reduces the risk of errors. This reduces labor costs and the level of expertise required during assembly.

[0017] In order to achieve the above-mentioned purposes, it is a hinge embodiment that allows the rear doors of trailers or semi-trailers to gain internal mobility without the need for an external hinge mechanism, comprising a profile that serves as the body,

[0018] • a door slot formed on one side edge of the profile, into which the door is positioned to be fixed,

[0019] • a shaft slot formed on the opposite edge of the profile where there is no door slot,

[0020] • at least one bearing fixed on the side walls that allow the right and left sides of the trailer or semi-trailer to be closed,

[0021] • at least one shaft connecting the bearings and the profile to each other to ensure that the profile and the door connected to the profile can rotate

[0022] The structural and characteristic features of the present invention will be understood clearly by the following drawings and the detailed description made with reference to these drawings and therefore the evaluation shall be made by taking these figures and the detailed description into consideration.

[0023] Figures Clarifying the Invention

[0024] Figure 1 shows the elements that make up the shaft embodiment that is the subject of the invention.

[0025] Figure 2 shows the use of the shaft embodiment which is the subject of the invention on the vehicle.

[0026] Figure 3 shows the use of the shaft embodiment which is the subject of the invention on the vehicle.

[0027] Figure 4 shows the tool used by the shaft embodiment which is the subject of the invention.

[0028] Figure 5 shows the hinge mechanism used in the state of the art.

[0029] Description of the Part references

[0030] 1 Trailer or semi-trailer

[0031] 2 Towing vehicle

[0032] 3 Door

[0033] 4 Profile

[0034] 5 Bearing

[0035] 6. Shaft 7 Door slot

[0036] 8. Shaft slot

[0037] 9 Side wall

[0038] Detailed Description of the Invention

[0039] In this detailed description, the preferred embodiments of the inventive hinge embodiment are described by means of examples only for clarifying the subject matter.

[0040] Trailers or semi-trailers (1) are carrier elements used in road transport, enabling loads to be carried by a towing vehicle (2). The right and left sides of the trailer or semi-trailer (1) are closed with side walls (9). While the loads are carried safely in the area created between the said side walls (9), the space between the rear edges of the side walls (9) is closed with a door (3). Said door (3) is opened and closed to access the loading area during loading and unloading of the cargo. Said hinge embodiment of the present invention enables the door (3) to move within itself without the need for an external hinge mechanism.

[0041] The hinge embodiment which is the subject of the invention basically comprises a profile (4), at least one bearing (5), at least one shaft (6), a door slot (7) and a shaft slot (8). Said profile (4) serves as a body and the door slot (7) is formed on one side edge of the profile (4) and the door (3) is positioned to be fixed into the said door slot (7). Said shaft slot (8) is formed on the opposite side of the profile (4) where there is no door slot (7). The embodiment consisting of the profile (4), door slot (7) and shaft slot (8) is monolithic.

[0042] Said bearing (5) is the part to be fixed on the side wall (9), preferably by machining. There are cut-outs on the bearing (5) and shaft slot (8) with the same diameter as said shaft (6). The said bearings (5) and the said profile (4) are connected to each other by the said shaft (8). Thus, the profile (4) gains the ability to rotate on the axis of the said shaft (8). In this way, the movement of the door (3) connected to the profile (4) is ensured. The shaft (8) is preferably positioned vertically, tangential to the rear edge of the side wall (9).

Claims

CLAIMS1. A hinge embodiment that allows the rear doors (3) of trailers or semi-trailers (1) to gain internal mobility without the need for an external hinge mechanism, characterized by comprising:• a profile (4) that serves as body,• a door slot (7) formed on one side edge of the profile (4), into which the door (3) is positioned to be fixed,• a shaft slot (8) formed on the opposite edge of the profile (4) where there is no door slot (7),• at least one bearing (5) fixed on the side walls (9) that allow the right and left sides of the trailer or semi-trailer (1 ) to be closed,• at least one shaft (8) connecting the bearings (5) and the profile (4) to each other to ensure that the profile (4) and the door (3) connected to the profile (4) can rotate.

2. The hinge embodiment according to claim 1 , characterized in that the embodiment consisting of the profile (4), door slot (7) and shaft slot (8) is monolithic.

3. The hinge embodiment according to claim 1 or 2, characterized in that the cut-outs on the bearing (5) and shaft slot (8) are the same diameter as the shaft (6).

4. The hinge embodiment according to any of the preceding claims, characterized in that the shaft (8) is positioned vertically, tangent to the rear edge of the side wall (9).