An opening angle limiter for heavy-duty cast aluminum cabinet doors and an electrical cabinet.

Abstract

This utility model discloses an opening angle limiter for heavy-duty cast aluminum cabinet doors and an electrical cabinet, belonging to the field of cabinet door limiting devices. The limiter includes a first connecting seat, a first support rod, a second support rod, and a second connecting seat connected sequentially via a hinge shaft. The relative rotation of the first and second support rods around the hinge shaft enables switching between a retracted and extended state. In the extended state, the first limiting part on the first support rod and the second limiting part on the second support rod abut against each other, precisely and reliably limiting the opening angle of the cabinet door to a safe 90° position, and can withstand large inertial torque, effectively preventing impact, damage, and personal injury caused by excessive opening of the cabinet door. In the retracted state, the limiter retracts entirely, without affecting the normal closing of the cabinet door. This utility model has a compact structure and reliable limiting, solving the problems of insufficient torque value, angle mismatch, and limited installation space in existing limiters.

Description

Technical Field

[0001] This utility model belongs to the technical field of cabinet door limiting devices, specifically relating to an opening angle limiter for heavy-duty cast aluminum cabinet doors and a heavy-duty cast aluminum electrical cabinet including the opening angle limiter. Background Technology

[0002] Currently, heavy-duty cast aluminum electrical cabinets are widely used in harsh environments with extremely high equipment reliability requirements, such as specific ships and mobile command posts, due to their high structural strength, good electromagnetic shielding performance, and strong environmental adaptability. For example... Figure 1 As shown, the cabinet doors of this type of cabinet are usually precision cast from cast aluminum, which has good overall rigidity and strong resistance to deformation, but also results in a huge door weight (up to 25 kg).

[0003] In practical use, especially when ships are rocking due to wind and waves, the heavy cabinet doors generate a huge inertial torque during opening (calculated to be up to 86.3 N•m). For example... Figure 2 As shown, existing technologies commonly use multiple hinges 4 connected by a door lock 5 to achieve the opening, closing, and locking of the cabinet door 2 relative to the cabinet body 1. However, this structure lacks an effective angle maintenance and limiting mechanism after the door is opened. This makes the cabinet door prone to excessive swinging due to inertia, and the risks involved mainly include: 1. The huge impact force may damage the expensive hinge structure, causing the cabinet door to fail to close properly; 2. The door may violently collide with adjacent equipment, causing structural damage or damage to the surface coating of the equipment; 3. It poses a safety threat to personnel operating in front of the cabinet door, with the risk of pinching or impact.

[0004] To solve this problem, the art typically attempts to adopt... Figure 3 The commercially available standard limit switch 3 is shown. However, these general-purpose products have significant drawbacks and cannot meet the specific requirements of such heavy military cabinets: First, their rated load is usually low (common specifications can only withstand a torque of about 50 N•m), far below the 86.3 N•m required for this application, making them prone to tensile deformation or breakage under stress; Second, their limiting angle (usually 105° to 110°) does not match the precise 90° opening angle required for the internal space layout of ship cabinets, and an excessively large angle would occupy too much aisle space; Third, their structural dimensions are often large, making them difficult to arrange effectively in the narrow installation space inside the cabinet. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of insufficient load-bearing capacity, excessive limiting angle, and mismatch between the structural size and the installation space of heavy cast aluminum cabinet doors in existing limiters. It proposes a heavy cast aluminum cabinet door opening angle limiter with a compact structure, strong load-bearing capacity, and the ability to accurately limit the cabinet door opening angle to 90°. Furthermore, it proposes a heavy cast aluminum electrical cabinet including this limiter.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] On the one hand, an opening angle limiter for heavy-duty cast aluminum cabinet doors is provided, which is installed between the cabinet body and the cabinet door, including a first connecting seat, a first support rod, a second support rod and a second connecting seat;

[0008] The first connecting seat and the second connecting seat are used to connect the cabinet door and the cabinet body, respectively;

[0009] One end of the first support rod is hinged to the first connecting seat via the first connecting shaft; the other end of the first support rod is hinged to one end of the second support rod via the second connecting shaft; the other end of the second support rod is hinged to the second connecting seat via the third connecting shaft.

[0010] The first support rod and the second support rod are provided with a limiting structure at the hinge of the second connecting shaft. The limiting structure includes a first limiting part provided on the first support rod and a second limiting part provided on the second support rod.

[0011] The first and second support rods can rotate around the second connecting shaft to switch the limiter between a retracted state and an extended state. In the retracted state, the first and second support rods rotate relative to each other around the second connecting shaft until they come close together, so that the limiter retracts as a whole, thereby closing the cabinet door relative to the cabinet body. In the extended state, the first and second support rods rotate relative to each other around the second connecting shaft until they move away from each other, and the first limiting part of the first support rod abuts against the second limiting part of the second support rod to limit the opening angle of the cabinet door to the maximum opening position of 90°.

[0012] Furthermore, in the retracted state, the first support rod and the second support rod are stacked vertically; in the extended state, the first support rod and the second support rod are collinear.

[0013] Furthermore, the first support rod has an inwardly offset rotating part at the end connected to the first connecting seat, and the second support rod has an inwardly recessed yielding part at the end connected to the second connecting seat; when the limiter is in the retracted state, the rotating part is accommodated within the space defined by the yielding part.

[0014] Furthermore, the first limiting part is a first protrusion protruding from the body of the first support rod in a direction parallel to the axis of the second connecting shaft; the second limiting part is a second protrusion protruding from the body of the second support rod in a direction parallel to the axis of the second connecting shaft.

[0015] Furthermore, the first connecting seat, the first support rod, the second support rod, and the second connecting seat are all formed from metal sheets.

[0016] Furthermore, the first connecting seat includes a first base and a connecting portion extending vertically from the first base. The first base is used to be fixed to the cabinet door, and the connecting portion is used to be connected to the first support rod. The second connecting seat includes a second base and two lugs extending from both ends of the second base. The second base is used to be connected to the second support rod, and the lugs are used to be fixed to the cabinet body.

[0017] Furthermore, retaining rings are installed on the first, second, and third connecting shafts to axially fix the hinged components.

[0018] On the other hand, a heavy-duty cast aluminum electrical cabinet is provided, including a cabinet body, a heavy-duty cast aluminum cabinet door connected to the cabinet body by hinges, and a door lock. The cabinet also includes the aforementioned opening angle limiter.

[0019] The advantages of this utility model are:

[0020] 1. The opening angle limiter for heavy-duty cast aluminum cabinet doors provided by this utility model provides a stable and reliable mechanical limit for heavy-duty cast aluminum cabinet doors with a simple structure and low cost through a linkage mechanism formed by the hinge of the first support rod and the second support rod and the limiting part thereon. It precisely limits the opening angle of the cabinet door to 90°, effectively preventing the cabinet door from being over-opened due to excessive inertial force during the opening process, thereby avoiding the risk of hinge damage, cabinet collision and personnel injury. It solves the problems of insufficient torque value, angle mismatch and limited installation space of existing general limiters.

[0021] 2. The heavy-duty cast aluminum electrical cabinet provided by this utility model, compared with the existing cabinet, significantly improves the safety and reliability of the entire cabinet under harsh working conditions such as ship turbulence due to the addition of an opening angle limiter. It can not only prevent damage to the cabinet door, hinges and cabinet body due to violent impact, thus extending the equipment life, but also provide a stable working environment for operators, preventing pinching or impact injuries, meeting high standard application requirements and optimizing the equipment maintenance experience.

[0022] 3. Without altering the original cabinet, this utility model only requires mounting holes for the limiter to be made on the cabinet body and cabinet door to achieve the function of limiting the opening angle of the cabinet door. It is easy to implement, has low improvement costs, and is highly applicable. Attached Figure Description

[0023] The above and / or other features and advantages of the present invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0024] Figure 1 This is a three-dimensional structural diagram of an existing cast aluminum electrical cabinet with the cabinet door closed.

[0025] Figure 2 This is a three-dimensional structural diagram of an existing cast aluminum electrical cabinet with the cabinet door open.

[0026] Figure 3 This is a three-dimensional schematic diagram of the structure of an existing standard limit switch;

[0027] Figure 4 This is a three-dimensional structural diagram of the opening angle limiter for heavy-duty cast aluminum cabinet doors in the unfolded state.

[0028] Figure 5 This is a three-dimensional structural diagram of the opening angle limiter for heavy-duty cast aluminum cabinet doors in the retracted state.

[0029] Figure 6 This is a three-dimensional structural schematic diagram of the first connecting seat in this utility model;

[0030] Figure 7 This is a three-dimensional structural schematic diagram of the second connecting seat in this utility model;

[0031] Figure 8 This is a three-dimensional structural schematic diagram of the first support rod in this utility model;

[0032] Figure 9 This is a three-dimensional structural schematic diagram of the second support rod in this utility model;

[0033] Figure 10 This is a three-dimensional structural diagram of the heavy-duty cast aluminum electrical cabinet of this utility model.

[0034] In the figure: 1-cabinet body; 2-cabinet door; 3-existing standard limiter; 4-hinge; 5-door lock; 6-first connecting seat, 61-first base, 62-connecting part; 7-first support rod, 71-first limiting part; 72-rotating part; 8-connecting shaft assembly, 81-first connecting shaft, 82-second connecting shaft, 83-third connecting shaft; 9-second support rod, 91-second limiting part; 92-yielding part; 10-second connecting seat, 101-second base, 102-lug; 100-opening angle limiter provided by this utility model. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0036] It should be noted that, in the context of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, terms such as "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] Reference Figure 2 The limiter provided by this utility model is used to be installed between the cabinet body 1 and the cabinet door 2 of a heavy-duty cast aluminum electrical cabinet to withstand the huge inertial torque generated when the cabinet door 2 is opened, and to limit the opening angle of the cabinet door 2 relative to the cabinet body 1 to 90°; at the same time, the hinge linkage mechanism of the limiter can be quickly folded back when the cabinet door is closed, without affecting the normal closing and locking of the cabinet door.

[0039] Reference Figure 4 and Figure 5 As an exemplary embodiment of this utility model, the opening angle limiter for a heavy-duty cast aluminum cabinet door includes a first connecting seat 6, a first support rod 7, a connecting shaft assembly 8, a second support rod 9, and a second connecting seat 10. The first connecting seat 6 and the second connecting seat 10 are respectively used to connect the cabinet door 2 and the cabinet body 1 to realize the installation of the limiter between the cabinet body and the cabinet door. The connecting shaft assembly 8 is used to realize the hinge between the first connecting seat 6, the first support rod 7, the second support rod 9, and the second connecting seat 10, and includes a first connecting shaft 81, a second connecting shaft 82, and a third connecting shaft 83.

[0040] Specifically, one end of the first support rod 7 is hinged to the first connecting seat 6 via the first connecting shaft 81; the other end of the first support rod 7 is hinged to one end of the second support rod 9 via the second connecting shaft 82; and the other end of the second support rod 9 is hinged to the second connecting seat 10 via the third connecting shaft 83.

[0041] Combination Figure 6In some embodiments of this utility model, the first connecting seat 6 includes a first base 61 and a connecting portion 62 extending vertically from the first base 61. The first base 61 may be generally plate-shaped with semi-circular ends, and the connecting portion 62 may be a thin sheet with a semi-circular upper end. The first base 61 is used to fix to the cabinet door 2. Specifically, the first base 61 can be connected to the cabinet door by screws passing through the mounting holes at both ends of the first base 61. The connecting portion 62 is used to connect to the first support rod 7, specifically by passing the first connecting shaft 81 through the connecting hole on the connecting portion 62 and the connecting hole on the first support rod 7. The axis of the connecting hole on the connecting portion 62 is perpendicular to the axis of the mounting hole on the first base 61.

[0042] Combination Figure 7 The second connecting seat 10 may include a second base 101 and two lugs 102 extending from both ends of the second base 101. The second base 101 is used to connect with the second support rod 9, specifically by passing a third connecting shaft 83 through a connecting hole in the second base 101 and a connecting hole on the second support rod 9. The lugs 102 are used to be fixed to the cabinet 1, and can be fixed to the cabinet by screws passing through mounting holes on the lugs 102. The lugs 102 may be bent such that the axis of the mounting hole on the lugs 102 is parallel to the axis of the connecting hole on the second base 101.

[0043] The structural design of the first and second connecting seats allows the limiters to be easily and securely installed on the cabinet and cabinet door using standard fasteners (such as screws). The installation method is flexible and reliable, and it is convenient for on-site debugging and maintenance.

[0044] The first support rod 7 and the second support rod 9 can rotate around the second connecting shaft 82, so that the limiter... Figure 5 The collapsed state shown is the same as Figure 4 The device switches between the unfolded and retracted states. In the retracted state, the first support rod 7 and the second support rod 9 rotate relative to each other around the second connecting shaft 82 until they are close together. This means the unconnected ends of the two support rods are close together, and the angle between them is small, ideally an acute angle between 0° and 45°. This allows the limiter to retract completely, thus closing the cabinet door 2 relative to the cabinet body 1 and locking the door lock 5. In an optional embodiment of this invention, in the retracted state, the first support rod 7 and the second support rod 9 are stacked vertically, meaning the angle between them is 0°. This structure ensures that the limiter retracts to its most compact state when the cabinet door is closed, minimizing the space occupied inside the cabinet.

[0045] When cabinet door 2 is opened, the first support rod 7 and the second support rod 9 move from the retracted state to the unfolded state. The first support rod 7 and the second support rod 9 rotate relative to each other around the second connecting shaft 82, and the connection angle between the two support rods increases until they reach the fully unfolded state. In this state, the distance between the unconnected ends of the two support rods is relatively large, and the angle between the first support rod 7 and the second support rod 9 can be an obtuse angle of 135° to 180° to limit the opening angle of cabinet door 2 to the maximum opening position of 90°. Preferably, in the unfolded state, the angle between the first support rod 7 and the second support rod 9 is 180°, and the two support rods are collinear and located in each other's length extension direction.

[0046] Reference Figure 8 and Figure 9 To limit the opening angle of the cabinet door, a limiting structure is provided at the hinge of the first support rod 7 and the second support rod 9 on the second connecting shaft 82. The limiting structure includes a first limiting part 71 on the first support rod 7 and a second limiting part 91 on the second support rod 9. In a preferred embodiment, the first limiting part 71 is a first protrusion protruding from one side of the main body of the first support rod 7 in a direction parallel to the axis of the second connecting shaft 82, with the protrusion direction facing the second support rod 9. The first limiting part 71 is positioned near the hole on the first support rod 7 that passes through the second connecting shaft 82. The second limiting part 91 is a second protrusion protruding from one side of the main body of the second support rod 9 in a direction parallel to the axis of the second connecting shaft 82, with the protrusion direction facing the first support rod 7. The second limiting part 91 is positioned near the hole on the second support rod 9 that passes through the second connecting shaft 82. By designing the first and second limiting parts as protrusion structures parallel to the hinge axis and machining limiting planes on the protrusions, a force contact point with a large area and robust structure is created, which can effectively disperse and withstand huge impact torque, greatly enhancing the reliability and durability of the limiter and solving the problem of the limiter being pulled and broken.

[0047] When cabinet door 2 is opened, the first support rod 7 and the second support rod 9 rotate around the second connecting shaft 82 to reach the maximum limit position, that is, the fully unfolded position. At this time, the first limiting part 71 on the first support rod 7 and the second limiting part 91 on the second support rod 9 abut and tighten, realizing mechanical positioning. At this time, the cabinet door is fixed in the 90° position required by the structural design and can be safely used for the inspection and maintenance of electrical components inside the cabinet.

[0048] In a further embodiment of this utility model, the first support rod 7 has an inwardly offset rotating part 72 at the end connected to the first connecting seat 6, and the second support rod 9 has an inwardly recessed yielding part 92 at the end connected to the second connecting seat 10. When the limiter is in the retracted state, the rotating part 72 is accommodated within the space defined by the yielding part 92. By providing a rotating part and a yielding part at the ends of the first support rod 7 and the second support rod 9 respectively, and by accommodating the rotating part within the space of the yielding part during folding, the retracted form of the limiter is further optimized, making its structure more compact, its overall integrity stronger, and its movement smoother and interference-free.

[0049] In addition, retaining rings can be installed on the first connecting shaft 81, the second connecting shaft 82, and the third connecting shaft 83 to axially fix the hinged components. By installing retaining rings on each connecting shaft, reliable axial fixation of all hinged components is achieved, preventing axial movement or detachment under long-term use and high-load impact, thus ensuring the stability and safety of the entire limiter's working state.

[0050] According to this utility model, the first connecting seat 6, the first support rod 7, the second support rod 9, and the second connecting seat 10 can all be formed from metal sheets. This significantly reduces the overall weight and manufacturing cost of the limiter while ensuring sufficient mechanical strength and bending stiffness of the support rod, achieving a balance between lightweight and high strength, making it particularly suitable for the repeated operation of heavy-duty doors.

[0051] As described above, the opening angle limiter for heavy-duty cast aluminum cabinet doors of this utility model provides stable and reliable mechanical limiting for heavy-duty cast aluminum cabinet doors with a simple structure and low cost through a linkage mechanism formed by the hinge of the first support rod and the second support rod and the limiting part thereon. It precisely limits the opening angle of the cabinet door to 90°, effectively preventing the cabinet door from being over-opened due to excessive inertial force during the opening process, thereby avoiding the risk of hinge damage, cabinet collision and personnel injury. It solves the problems of insufficient torque value, angle mismatch and limited installation space of existing general limiters.

[0052] Reference Figure 10 As an exemplary embodiment of this utility model, the heavy-duty cast aluminum electrical cabinet includes a cabinet body 1, a heavy-duty cast aluminum cabinet door 2 connected to the cabinet body 1 by a hinge 4, and a door lock 5. The electrical cabinet also includes the aforementioned opening angle limiter 100. The first connecting seat 6 of the opening angle limiter 100 is fixedly installed on the cabinet door 2, and the second connecting seat 10 is fixedly installed on the cabinet body 1.

[0053] The heavy-duty cast aluminum electrical cabinet provided by this utility model, compared with existing cabinets, significantly improves the safety and reliability of the entire cabinet under harsh conditions such as shipboard turbulence due to the addition of an opening angle limiter. It not only prevents damage to the cabinet door, hinges, and cabinet body from violent impacts, extending equipment lifespan, but also provides a stable working environment for operators, preventing pinching or impact injuries, meeting high-standard application requirements, and optimizing equipment maintenance experience. Furthermore, the heavy-duty cast aluminum electrical cabinet of this utility model does not require changes to the structure and component dimensions of existing cabinets. Simply by creating mounting holes for the limiter on the cabinet body and door, the limiter can be installed. This is easy to implement, has low modification costs, and is highly applicable, resulting in a new type of cabinet that can limit the opening angle of the cabinet door, improving the performance of existing cabinets.

[0054] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. An opening angle limiter for heavy cast aluminum cabinet door, installed between the cabinet body (1) and the cabinet door (2), characterized in that: It includes a first connecting seat (6), a first support rod (7), a second support rod (9), and a second connecting seat (10); The first connecting seat (6) and the second connecting seat (10) are used to connect the cabinet door (2) and the cabinet body (1), respectively. One end of the first support rod (7) is hinged to the first connecting seat (6) via the first connecting shaft (81); the other end of the first support rod (7) is hinged to one end of the second support rod (9) via the second connecting shaft (82); the other end of the second support rod (9) is hinged to the second connecting seat (10) via the third connecting shaft (83); The first support rod (7) and the second support rod (9) are provided with a limiting structure at the hinge of the second connecting shaft (82). The limiting structure includes a first limiting part (71) provided on the first support rod (7) and a second limiting part (91) provided on the second support rod (9). The first support rod (7) and the second support rod (9) can rotate around the second connecting shaft (82) to switch the limiter between a retracted state and an unfolded state. In the retracted state, the first support rod (7) and the second support rod (9) rotate relative to each other around the second connecting shaft (82) until they come close to each other, so that the limiter retracts as a whole, thereby achieving the closure of the cabinet door (2) relative to the cabinet body (1). In the unfolded state, the first support rod (7) and the second support rod (9) rotate relative to each other around the second connecting shaft (82) until they are far apart. The first limiting part (71) of the first support rod (7) abuts against the second limiting part (91) of the second support rod (9) to limit the opening angle of the cabinet door (2) to the maximum opening position of 90°.

2. The opening angle limiter for heavy-duty cast aluminum cabinet doors according to claim 1, characterized in that: In the retracted state, the first support rod (7) and the second support rod (9) are stacked vertically; in the unfolded state, the first support rod (7) and the second support rod (9) are collinear.

3. The opening angle limiter for heavy-duty cast aluminum cabinet doors according to claim 2, characterized in that: The first support rod (7) has an inwardly offset rotating part (72) at the end connected to the first connecting seat (6), and the second support rod (9) has an inwardly recessed yielding part (92) at the end connected to the second connecting seat (10); when the limiter is in the retracted state, the rotating part (72) is accommodated in the space defined by the yielding part (92).

4. The opening angle limiter for heavy-duty cast aluminum cabinet doors according to claim 1 or 2, characterized in that: The first limiting part (71) is a first protrusion protruding from the body of the first support rod (7) in a direction parallel to the axis of the second connecting shaft (82); the second limiting part (91) is a second protrusion protruding from the body of the second support rod (9) in a direction parallel to the axis of the second connecting shaft (82).

5. The opening angle limiter for heavy-duty cast aluminum cabinet doors according to claim 1 or 2, characterized in that: The first connecting seat (6), the first support rod (7), the second support rod (9) and the second connecting seat (10) are all formed from metal sheets.

6. The opening angle limiter for heavy-duty cast aluminum cabinet doors according to claim 1 or 2, characterized in that: The first connecting seat (6) includes a first base (61) and a connecting part (62) extending vertically from the first base (61). The first base (61) is used to be fixed to the cabinet door (2), and the connecting part (62) is used to be connected to the first support rod (7). The second connecting seat (10) includes a second base (101) and two lugs (102) extending from both ends of the second base (101). The second base (101) is used to connect with the second support rod (9), and the lugs (102) are used to fix to the cabinet (1).

7. The opening angle limiter for heavy-duty cast aluminum cabinet doors according to claim 1 or 2, characterized in that: Shaft retaining rings are installed on the first connecting shaft (81), the second connecting shaft (82) and the third connecting shaft (83) for axial fixation of the hinged components.

8. A heavy-duty cast aluminum electrical cabinet, characterized in that: The cabinet includes a cabinet body (1), a heavy-duty cast aluminum cabinet door (2) connected to the cabinet body (1) by a hinge (4), and a door lock (5). The cabinet also includes an opening angle limiter as described in any one of claims 1 to 7.

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