A cabinet door limiting displacement shaft hinge mechanism based on a cabinet body

Abstract

The utility model relates to a cabinet door limiting displacement shaft hinge mechanism based on cabinet body, is aimed at the problem that the existing hinge leads to cabinet door scratch cabinet body and lacks effective limiting, provides a kind of integrated scratchproof and limiting function's solution scheme.The hinge mechanism mainly includes fixed block, telescopic door shaft, spring, limiting pin, rotating block and limiting structure.The core lies in that telescopic door shaft is stretched out in free state by spring pre-tipping, drives cabinet door and cabinet body and forms scratchproof gap;At the same time, limiting rod on rotating block swings in the limiting slot of door shaft, realizes the mechanical limiting of cabinet door opening angle.The present application has compact structure, low cost, high reliability, can effectively protect cabinet coating and electromagnetic compatibility, and prevents cabinet door excessive opening from interfering surrounding equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of components for control cabinets, and in particular to a cabinet door limit displacement shaft hinge mechanism based on the cabinet body. Background Technology

[0002] Various metal control cabinets are widely used in fields such as power, communications, and industrial control. The cabinet doors are typically connected to the cabinet body via hinges. Currently, common cabinet door hinges (such as ordinary hinges or pivot hinges) have the following significant drawbacks:

[0003] The problem of door panel rubbing against the cabinet: With traditional hinges, the pivot point of rotation is close to the cabinet body, causing the door edge to rotate and rub against the mating surface of the cabinet during opening and closing. This continuous rubbing scratches the protective coating (such as paint or plating) on ​​the cabinet surface, exposing the metal substrate and leading to corrosion. This not only affects the aesthetics but, more seriously, can damage the electromagnetic shielding performance of the cabinet, affecting its electromagnetic compatibility (EMC) function.

[0004] Lack of opening angle limit; most basic hinges do not have a limit function, and cabinet doors can be opened to 180 degrees or even greater angles. In densely packed cabinet layouts, fully opened cabinet doors can easily encroach on the operating or maintenance space of adjacent equipment, posing a collision risk and affecting equipment safety and the convenience of personnel operation.

[0005] The functions are limited; although some hinges are designed with limit functions, they still cannot solve the problem of scratching at the beginning of opening the door; while other hinges with complex linkage or cam structures can achieve the sliding door effect, but they are complex in structure and expensive, and are not suitable for standard control cabinets with high requirements for cost and reliability.

[0006] Therefore, there is an urgent need for a hinge mechanism that is simple in structure, reliable, and can effectively prevent the cabinet door from scratching the cabinet body while precisely limiting the opening and closing angle of the cabinet door. Utility Model Content

[0007] To solve the above technical problems, this utility model provides a cabinet door limit displacement axis hinge mechanism based on a cabinet body, comprising:

[0008] Fixing blocks are used for mounting on the cabinet.

[0009] A retractable door hinge is axially slidably disposed within the fixed block; a spring is sleeved at the tail end of the retractable door hinge, providing an elastic force that tends to extend the retractable door hinge outward from the fixed block.

[0010] A limiting pin passes through a slot on the retractable door hinge and is fixed to the fixing block, wherein the length direction of the slot is consistent with the axial direction of the retractable door hinge, so as to limit the axial movement of the retractable door hinge within a fixed range.

[0011] A rotating block is installed on the cabinet door and is rotatably connected to the retractable door hinge via a rotating shaft.

[0012] The limiting structure includes a limiting groove disposed on the retractable door hinge and a limiting rod disposed on the rotating block. The limiting rod extends into the limiting groove and swings within the limiting groove when the cabinet door is opened and closed, thereby limiting the maximum opening angle of the cabinet door.

[0013] In one embodiment of this utility model, the fixing block is provided with a long blind hole for mounting the retractable door hinge and the spring.

[0014] In one embodiment of this utility model, the rotating shaft is disposed on the rotating block and inserted into the shaft hole at the top of the retractable door shaft, so that the rotating block can rotate relative to the retractable door shaft.

[0015] In one embodiment of this utility model, under the action of the elastic force of the spring, the retractable door hinge is in the extended state, so that the cabinet door connected to the rotating block maintains a distance from the cabinet body in the free state.

[0016] In one embodiment of this utility model, the hinge mechanisms are used in pairs and are symmetrically arranged at the upper and lower ends of the cabinet door.

[0017] Compared with the prior art, the above-mentioned technical solution of this utility model has the following advantages: The cabinet door limiting displacement shaft hinge mechanism of this utility model uses a spring to push the retractable door shaft, so that the cabinet door maintains a safe gap with the cabinet body in a free state, completely avoiding scratches on the protective layer of the cabinet body during opening and closing, fundamentally preventing coating damage and cabinet corrosion, and ensuring electromagnetic compatibility performance; and the angle limitation is achieved by the swing of the limiting rod in the limiting groove, which is simple and reliable in structure, can accurately control the opening angle of the cabinet door, and prevent it from intruding into the space of adjacent equipment; at the same time, the overall structure of the hinge mechanism is simple, with few parts, convenient assembly, low manufacturing cost and high reliability while realizing composite functions, and is suitable for large-scale application. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the cabinet door limit displacement axis hinge mechanism based on the cabinet body of this utility model;

[0020] Figure 2 This is a schematic diagram of the limiting structure in the cabinet door limit displacement shaft hinge of this utility model.

[0021] As shown in the figure: 1. Telescopic door hinge; 2. Limit pin; 3. Spring; 4. Fixing block; 5. Rotating block; 6. Limit rod; 7. Rotating shaft; 8. Limit groove. Detailed Implementation

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a cabinet door limit displacement axis hinge mechanism based on the cabinet body, which mainly consists of a fixed block 4, a telescopic door shaft 1, a spring 3, a limit pin 2, a rotating block 5, and a limit structure composed of a limit groove 8 and a limit rod 6.

[0023] The specific fixed installation part: The fixing block 4 serves as the base of the hinge and is fixedly installed at the top and bottom corners of the control cabinet by screws and other fasteners. The fixing block 4 has a long blind hole machined inside to accommodate the retractable door hinge 1 and the spring 3.

[0024] Specifically, the telescopic movement mechanism involves a spring 3 fitted onto the tail end of the telescopic door hinge 1, which is then inserted into the long blind hole of the fixing block 4. The limiting pin 2 passes through a long slot on the shaft of the telescopic door hinge 1 and is ultimately driven into the pin hole of the fixing block 4. The length of this slot is parallel to the axial direction of the telescopic door hinge 1, ensuring that the limiting pin 2 engages with the slot. This restricts the telescopic door hinge 1 to move only within a fixed axial travel range without dislodging, while also guaranteeing smooth compression and rebound.

[0025] The specific rotation and limiting parts are as follows: the rotating block 5 is fixedly installed on the cabinet door with screws. The end of the rotating block 5 is provided with a rotating shaft 7 and a limiting rod 6. During assembly, the rotating shaft 7 on the rotating block 5 is inserted into the shaft hole at the top of the retractable door shaft 1 to form a rotating pair. Simultaneously, the limiting rod 6 on the rotating block 5 is embedded into the limiting groove 8 at the top of the retractable door shaft 1.

[0026] The hinge mechanism described in this embodiment operates as follows: When the cabinet door is in a free state without external force, the spring force of the spring 3 fitted at the end of the retractable door hinge 1 pushes the retractable door hinge 1 outward, placing it in the extended position. This action is transmitted to the cabinet door through the rotating block 5, maintaining a predetermined gap between the door's contact surface and the cabinet surface. When opening or closing the cabinet door, due to this initial gap, the edge of the cabinet door will not contact or scratch the cabinet surface during the entire rotation process, thus effectively protecting the cabinet's protective coating and electromagnetic shielding function. When closing the cabinet door, only a pushing force greater than the spring preload is needed to smoothly push the cabinet door to a position where it is completely in contact with the cabinet and then fixed in place.

[0027] The specific limiting operation process is as follows: When the cabinet door is rotated, the rotating block 5 rotates around the rotating shaft 7, and the limiting rod 6 on it swings within the limiting groove 8. The two end walls of the limiting groove 8 form a mechanical stop. When the cabinet door is opened to the maximum design angle, the limiting rod 6 will contact one end wall of the limiting groove 8, preventing the rotating block 5 from rotating further, thereby achieving precise limitation of the cabinet door opening and closing angle and preventing interference with surrounding equipment.

[0028] In this embodiment, the hinge mechanism is typically used in pairs in practical applications, with two sets of hinge mechanisms symmetrically arranged at the upper and lower ends of the cabinet door. Through the synchronous extension, contraction, and rotation of the upper and lower hinges, a stable and smooth opening and closing action of the cabinet door is achieved, as well as reliable anti-scratch and angle limiting functions.

[0029] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A cabinet door limit displacement axis hinge mechanism based on a cabinet body, characterized in that, include: Fixing block (4) is used for installation on the cabinet; A retractable door hinge (1) is axially slidably disposed within the fixed block (4); a spring (3) is sleeved at the tail end of the retractable door hinge (1); The limiting pin (2) passes through the slot on the retractable door shaft (1) and is fixed to the fixing block (4), wherein the length direction of the slot is consistent with the axial direction of the retractable door shaft (1); A rotating block (5) is installed on the cabinet door and is rotatably connected to the retractable door shaft (1) via a rotating shaft (7); The limiting structure includes a limiting groove (8) provided on the retractable door hinge (1) and a limiting rod (6) provided on the rotating block (5). The limiting rod (6) extends into the limiting groove (8) and swings within the limiting groove (8) when the cabinet door is opened and closed.

2. The cabinet door limit displacement shaft hinge mechanism according to claim 1, characterized in that: The fixing block (4) is provided with a long blind hole for mounting the telescopic door hinge (1) and the spring (3).

3. The cabinet door limit displacement shaft hinge mechanism according to claim 1, characterized in that: The rotating shaft (7) is mounted on the rotating block (5) and inserted into the shaft hole at the top of the retractable door shaft (1).

4. The cabinet door limit displacement shaft hinge mechanism according to claim 1, characterized in that: Under the elastic force of the spring (3), the retractable door hinge (1) is in the extended state, so that the cabinet door connected to the rotating block (5) is kept at a distance from the cabinet body in the free state.

5. The cabinet door limit displacement shaft hinge mechanism according to claim 1, characterized in that: Furthermore, the hinge mechanisms are used in pairs, symmetrically arranged at the top and bottom ends of the cabinet door.

Images