Hidden door hinge of cabinet body

Abstract

The utility model provides a hidden type door hinge of a cabinet body, which relates to the technical field of electrical equipment accessories and comprises the cabinet body, a D-shaped base, a middle shaft, a G-shaped base and a limiting pin, the D-shaped base is connected with the G-shaped base in an embedded mode, the middle shaft penetrates through the D-shaped base and the G-shaped base to achieve rotation of the hinge, and the limiting pin is connected with the D-shaped base and the G-shaped base. The whole hinge is made of a steel plate material and is fixed in the cabinet body through a hidden welding technology, and the opening and closing angle of the box door is larger than 135 degrees. The embedded connection structure of the D-shaped base and the G-shaped base and the hidden welding technology replace a traditional screw fixing mode, the problems of hinge looseness and breakage caused by frequent door opening and closing or transportation collision are effectively solved, meanwhile, a welding seam is located in the cabinet body, no welding mark exists on the outer surface, the overall appearance of the cabinet body is concise and attractive, and the service life of the cabinet body is prolonged. And the wear-resistant coating on the surface of the middle shaft is fixed with the limiting pin, so that the wear and axial displacement of the middle shaft are reduced, and the service life of the hinge is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment accessories technology, and in particular to a concealed door hinge for a cabinet. Background Technology

[0002] With the widespread application of electrical equipment in industrial production, commercial operations, and daily life, cabinets, as important carriers of electrical equipment, are receiving increasing attention for their performance and appearance. Cabinet door hinges, as key components connecting the cabinet door and the cabinet body, directly affect the ease of opening and closing the door, its stability, and the overall aesthetics of the cabinet.

[0003] In the existing technology, most common cabinet door hinges are external or injection-cast products fixed with screws. External hinges are rather obtrusive in the appearance of the cabinet, which disrupts the overall simplicity and harmony of the cabinet. This is especially true in places where aesthetics are important, such as high-end office buildings and data centers, where they are difficult to meet the requirements. On the other hand, hinges fixed with screws are prone to loosening due to frequent opening and closing of the cabinet door over a long period of use, resulting in an unstable hinge and affecting the normal use of the cabinet door. In addition, during the transportation or handling of the cabinet, external or injection-cast hinges are very prone to loosening or even cracking when subjected to vibration or impact. This not only increases maintenance costs but may also pose a potential threat to the electrical equipment inside the cabinet. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology where the screws are easily loosened when the door is frequently opened and closed, the door is not firmly fixed, and the door hinges may loosen or crack due to shaking or collision during transportation or handling of external or injection-cast products. Therefore, a hidden door hinge for cabinets is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a concealed door hinge for a cabinet, comprising a cabinet body, a D-shaped base, a central shaft, a G-shaped base, and a limiting pin. The D-shaped base and the G-shaped base are connected by an interlocking method. The central shaft passes through the D-shaped base and the G-shaped base to realize the rotation of the hinge. The hinge is made of steel plate and is fixed inside the cabinet body by a concealed welding process, so that the opening angle of the cabinet door is greater than 135°.

[0006] Preferably, the mating surfaces of the D-shaped base and the G-shaped base are provided with matching concave and convex structures.

[0007] Preferably, the surface of the central shaft is coated with a wear-resistant coating and fixed inside the G-shaped base by a limiting pin.

[0008] Preferably, when the cabinet height is ≤900mm, two sets of hinges are installed, and when the cabinet height is ≥1000mm, three sets of hinges are installed.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] 1. In this utility model, the interlocking connection structure of the D-shaped base and the G-shaped base and the hidden welding process replace the traditional screw fixing method, which effectively avoids the problem of hinge loosening and breakage caused by frequent opening and closing of the door or transportation collision. At the same time, the welding seam is located inside the cabinet and there are no welding marks on the outer surface, making the overall appearance of the cabinet simple and beautiful. Furthermore, the wear-resistant coating on the surface of the central shaft and the fixing design of the limit pin reduce the wear and axial displacement of the central shaft and extend the service life of the hinge.

[0011] 2. In this utility model, the number of hinges is flexibly configured by installing 2 sets for cabinets with a height ≤900mm and 3 sets for cabinets with a height ≥1000mm, ensuring the opening and closing stability and structural strength of cabinets of different specifications. Attached Figure Description

[0012] Figure 1 A three-dimensional structural diagram of a concealed door hinge for a cabinet is provided for this utility model.

[0013] Figure 2 This utility model proposes a concealed door hinge for a cabinet. Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 This utility model provides a partial structural diagram of a D-shaped base for a concealed door hinge in a cabinet.

[0015] Figure 4 This utility model provides a partial structural diagram of a G-shaped base for a concealed door hinge in a cabinet.

[0016] Figure 5 This utility model presents a partial structural diagram of the central axis and limiting pin of a concealed door hinge for a cabinet.

[0017] Illustration: 1. Cabinet; 2. D-shaped base; 3. Central axis; 4. G-shaped base; 5. Limit pin. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1: As Figures 1-5 As shown, this utility model provides a technical solution: a concealed door hinge for a cabinet, including a cabinet body 1, a D-shaped base 2, a central shaft 3, a G-shaped base 4, and a limiting pin 5. The D-shaped base 2 and the G-shaped base 4 are connected by an interlocking method. The central shaft 3 passes through the D-shaped base 2 and the G-shaped base 4 to realize the rotation of the hinge. The hinge is made of steel plate and is fixed inside the cabinet body 1 by a concealed welding process, so that the opening angle of the cabinet door is greater than 135°. The interlocking surfaces of the D-shaped base 2 and the G-shaped base 4 are provided with matching concave and convex structures. The surface of the central shaft 3 is coated with a wear-resistant coating and is fixed inside the G-shaped base 4 by the limiting pin 5. When the height of the cabinet body 1 is ≤900mm, two sets of hinges are installed. When the height of the cabinet body 1 is ≥1000mm, three sets of hinges are installed.

[0021] In this embodiment, the interlocking connection structure of the D-shaped base 2 and the G-shaped base 4, along with the concealed welding process, replaces the traditional screw fixing method, effectively avoiding hinge loosening and breakage caused by frequent door opening and closing or transportation collisions. At the same time, the welding seam is located inside the cabinet 1, with no welding marks on the outer surface, making the overall appearance of the cabinet 1 simple and beautiful. Furthermore, the wear-resistant coating on the surface of the central shaft 3 and the fixing design of the limiting pin 5 reduce the wear and axial displacement of the central shaft 3, extending the service life of the hinge. The number of hinges can be flexibly configured according to the cabinet 1 height ≤ 900mm (2 sets) and the cabinet 1 height ≥ 1000mm (3 sets), ensuring the door opening and closing stability and structural strength of cabinets 1 of different specifications.

[0022] The working principle of this embodiment is as follows: When installing the concealed door hinges of this cabinet 1, the number of hinges to be installed is first determined according to the height of the cabinet 1. If the height of the cabinet 1 is ≤900mm, prepare 2 sets of hinges; if the height of the cabinet 1 is ≥1000mm, prepare 3 sets of hinges. Next, prepare the cabinet 1. Since the hinges are fixed inside the cabinet 1 using a concealed welding process, the D-shaped base 2 and the G-shaped base 4 are first connected by their matching concave-convex structures to initially position them. Then, the middle part coated with a wear-resistant coating is installed. A central shaft 3 passes through both the D-shaped base 2 and the G-shaped base 4. A limiting pin 5 then secures the central shaft 3 inside the G-shaped base 4. After installation, when using cabinet 1, to open the door, the operator pulls the door, causing the hinges connected to it to move. Because the central shaft 3 passes through the D-shaped base 2 and the G-shaped base 4, the D-shaped base 2 and the G-shaped base 4 can rotate around the central shaft 3, thus opening the door. The opening angle can be greater than 135°. To close the door, push the door, causing the hinges to rotate in the opposite direction until the door is closed. Throughout the entire process, the wear-resistant coating on the surface of the central shaft 3 reduces wear during rotation, and the limiting pin 5 prevents axial displacement of the central shaft 3, ensuring stable hinge operation.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A hidden door hinge of a cabinet body, comprising a cabinet body (1), a D-shaped base (2), a middle shaft (3), a G-shaped base (4) and a limiting pin (5), characterized in that: The D-shaped base (2) and the G-shaped base (4) are connected by embedding, the middle shaft (3) penetrates the D-shaped base (2) and the G-shaped base (4) to realize the rotation of the hinge, the whole hinge adopts steel plate material and is fixed in the cabinet body (1) by hidden welding process, and the opening and closing angle of the cabinet door is greater than 135°.

2. A concealed door hinge for a cabinet according to claim 1, wherein: The embedding surfaces of the D-shaped base (2) and the G-shaped base (4) are provided with matched concave-convex structures.

3. The concealed door hinge for a cabinet as claimed in claim 1, wherein: The surface of the middle shaft (3) is coated with a wear-resistant coating, and is fixed in the G-shaped base (4) by a limiting pin (5).

4. The concealed door hinge for a cabinet as described in claim 1, wherein: When the cabinet height is less than or equal to 900 mm, two sets of hinges are installed, and when the cabinet height is greater than or equal to 1000 mm, three sets of hinges are installed.

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