Fireproof high load bearing bearing hinge

Abstract

The utility model provides a kind of fireproof high bearing load bearing hinge, including fixed base plate, two opposite hinged seats are integrally provided on the fixed base plate, hinge sleeve, upper pull rod and lower support rod are installed on the hinge shaft rotatingly installed on the hinged seat by bearing, the hinge sleeve is installed on the hinge arm and is connected with hinge base plate, the hinge arm is connected with the one end of upper pull rod and lower support rod;The utility model is integrally designed with the design of "fixed base plate+double hinged seat", thickens hinge shaft and is matched with multiple bearings, double "U" shape hinged seat stable support, "L" shape pull rod and triangle hinge arm cooperate, load is evenly transmitted, anti-torsion reduces abrasion, and is suitable for high-frequency scene.

Description

Technical Field

[0001] This utility model belongs to the field of hinge technology, and in particular relates to a fireproof high load-bearing bearing hinge. Background Technology

[0002] In fields such as construction, industrial equipment, shipbuilding, and rail transportation, hinges are essential for connecting components like doors and hatches to enable opening and closing. However, these scenarios often place dually stringent requirements on hinges: on the one hand, some doors (such as fire doors in high-rise buildings and maintenance doors for industrial furnaces) require hinges with high load-bearing capacity due to their heavy structure or the need to withstand additional loads, in order to prevent deformation, breakage, or other failures during long-term use; on the other hand, in extreme environments such as fires, ordinary hinges are prone to material strength degradation and lubrication failure due to high temperatures, which can lead to door detachment or inability to open or close, thus losing their crucial role in fire separation or emergency passage. Therefore, hinges must also meet reliable fire resistance requirements.

[0003] While existing technologies allow ordinary load-bearing hinges to meet certain load requirements, they often use conventional steel and ordinary bearings, making them prone to thermal deformation in high-temperature environments. Furthermore, they lack specific heat insulation designs, making it difficult to pass fire safety tests. Traditional fire-resistant hinges, although fire-resistant in their materials, have simple structural designs, often connected by a single shaft or thin blades, resulting in limited load-bearing capacity (typically no more than 300kg per hinge), making them unsuitable for heavy doors. In addition, some hinges lack wear-resistant and high-temperature-resistant insulating components in their rotating parts, leading to increased gaps due to wear over long-term use, affecting the door's stability and sealing.

[0004] Therefore, it is essential to invent a fire-resistant, high-load-bearing bearing hinge. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a fireproof high-load bearing hinge, including a fixed base plate, a hinge seat, a hinge shaft, a hinge sleeve, an upper pull rod, a lower support rod, a hinge arm, and a hinge base plate. Two opposing hinge seats are integrally arranged on the fixed base plate. The hinge shaft, which is rotatably mounted on the hinge seat via bearings, has the hinge sleeve, upper pull rod, and lower support rod mounted on it via bearings. The hinge arm mounted on the hinge sleeve is connected to the hinge base plate, and the hinge arm is connected to one end of the upper pull rod and the lower support rod.

[0006] Preferably, the two hinge seats integrally disposed on the fixed base plate are both U-shaped structures. The hinge sleeve, upper pull rod and lower support rod are all rotatably mounted on the hinge shaft of the two hinge seats through bearings, and high temperature resistant and wear-resistant ceramic gaskets are provided between them.

[0007] Preferably, the upper pull rod and the lower support rod are arranged opposite to each other and are both "L" shaped structures, with one end of each rod rotatably connected to the end of the hinge shaft, and the upper pull rod is located above the lower support rod.

[0008] Preferably, the hinge sleeve is rotatably mounted on the hinge shaft via a bearing and is located between the two hinge seats. The hinge sleeve, upper pull rod, and lower support rod are capable of moving in a circular trajectory along the axis of the hinge shaft.

[0009] Preferably, one end of the upper pull rod and the lower support rod is fixed to the surface of the hinge arm integrally provided on the hinge sleeve. The hinge arm has a triangular geometric structure, and one side of the hinge arm is fixedly connected to the side of the hinge base plate perpendicular to the ground.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This utility model adopts an integrated structural design of "fixed base plate + double hinge seat", combined with thickened hinge shaft and multi-bearing load distribution method, which greatly improves the rigidity and load-bearing capacity of the overall structure. Among them, the double "U" shaped hinge seat provides stable support for the hinge shaft. The hinge sleeve, upper pull rod and lower support rod are installed on the shaft in sequence through bearings to form a multi-point force system. The "L" shaped upper pull rod and lower support rod are arranged opposite each other and work together with the triangular hinge arm to evenly transfer the door load to the fixed base plate. The load-bearing capacity of a single hinge can reach more than 500 kg, which is suitable for the use of heavy doors or equipment compartment doors.

[0011] The triangular hinge arm design of this invention enhances the torsional strength of the connection with the hinge base plate, preventing door wobbling during opening and closing. When the hinge sleeve, upper pull rod, and lower support rod move in a circular motion along the hinge axis, the cooperation of bearings and ceramic washers reduces mechanical wear and lowers maintenance frequency. Simultaneously, the integrated structure reduces connection points, preventing structural failures caused by loose bolts, making it suitable for high-frequency applications. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0014] In the picture: Fixed base plate 1, hinge seat 2, hinge shaft 3, hinge sleeve 4, upper pull rod 5, lower support rod 6, hinge arm 7, hinge base plate 8. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0016] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for 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 the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0017] As attached Figure 1 To be continued Figure 2 As shown: This utility model provides a fireproof high-load bearing hinge, comprising a fixed base plate 1, a hinge seat 2, a hinge shaft 3, a hinge sleeve 4, an upper pull rod 5, a lower support rod 6, a hinge arm 7, and a hinge base plate 8. The fixed base plate 1 is integrally provided with two opposing hinge seats 2. The hinge shaft 3, which is rotatably mounted on the hinge seat 2 via bearings, is on which the hinge sleeve 4, the upper pull rod 5, and the lower support rod 6 are mounted via bearings. The hinge arm 7 mounted on the hinge sleeve 4 is connected to the hinge base plate 8, and the hinge arm 7 is connected to one end of the upper pull rod 5 and the lower support rod 6.

[0018] Furthermore, the fixed base plate 1 is integrally stamped from Q355ND fire-resistant steel plate with a thickness of not less than 8mm. Two U-shaped hinge seats 2 are integrally formed on its surface at relatively opposite positions. The openings of the two hinge seats 2 are opposite and parallel, and the distance between their inner walls is adapted to the length of the hinge shaft 3. The hinge sleeve 4, upper pull rod 5, and lower support rod 6 are all sequentially rotatably mounted on the hinge shaft 3 that passes through the two hinge seats 2 via high-precision high-temperature resistant bearings (such as zirconia ceramic bearings). The hinge sleeve 4 is located between the two hinge seats 2, while the upper pull rod 5 and lower support rod 6 are located on the outer sides of the two hinge seats 2, respectively. To reduce friction and wear between components and to block heat transfer, annular high-temperature resistant and wear-resistant ceramic gaskets (made of silicon nitride ceramic) are sandwiched between the hinge sleeve 4 and the hinge seat 2, and between the upper pull rod 5 / lower support rod 6 and the hinge seat 2. The inner hole of the ceramic gasket is clearance-fitted with the hinge shaft 3, and its outer diameter is slightly smaller than the contact surface diameter of the corresponding component.

[0019] Furthermore, both the upper pull rod 5 and the lower support rod 6 are forged from 40Cr alloy steel and have a symmetrical "L" shape. They are positioned opposite each other with the hinge sleeve 4 as the center. The upper pull rod 5 is located directly above the lower support rod 6, and the short ends of both are rotatably connected to the two ends of the hinge shaft 3 via bearings (the inner ring of the bearing is interference-fitted with the hinge shaft 3, and the outer ring is interference-fitted with the inner hole of the short end of the upper pull rod 5 / lower support rod 6). The long end of the upper pull rod 5 is bent downwards, and the long end of the lower support rod 6 is bent upwards, forming a bidirectional support structure for the hinge arm 7.

[0020] Furthermore, the hinge shaft 3 is machined from 40CrNiMoA alloy round steel with a diameter of not less than 16mm, and its two ends are fixed to the side walls of the hinge seat 2 by shoulders. A hinge sleeve 4 is rotatably mounted in the middle of the shaft via a deep groove ball bearing. The outer ring of the bearing is interference-fitted with the inner hole of the hinge sleeve 4, and the inner ring is interference-fitted with the hinge shaft 3. High-temperature resistant sealing rings (made of fluororubber) are provided on both sides of the bearing. The hinge sleeve 4 is cast from ductile iron, and its length is adapted to the distance between the two hinge seats 2. Driven by the hinge shaft 3, the hinge sleeve 4 can drive the upper pull rod 5 and the lower support rod 6 to move synchronously in a circular trajectory along the axis of the hinge shaft 3.

[0021] Furthermore, the long ends (opposite ends) of the upper pull rod 5 and the lower support rod 6 are fixedly connected to the surface of the hinge arm 7 integrally set on the hinge sleeve 4 by high-strength bolts (8.8 grade hexagon socket head cap screws). The bolts pass through the end through holes of the upper pull rod 5 / lower support rod 6 and are tightened into the threaded holes on the hinge arm 7. Anti-loosening washers are provided at the connection. The hinge arm 7 is made of Q355ND fire-resistant steel and integrally welded to the outer wall of the hinge sleeve 4. It has a triangular geometric structure and a thickness of 10-12mm. The side of the hinge arm 7 away from the hinge sleeve 4 is fixedly connected to the side of the hinge base plate 8 perpendicular to the ground by welding or bolting. The connection is fully welded and ground smooth to ensure that the two form a rigid connection.

[0022] The working principle is as follows: First, when the door (connected to the hinge base plate 8) is opened and closed by force, the force is transmitted through the hinge base plate 8 to the hinge arm 7 of the triangular structure. The hinge arm 7 transmits the force to the hinge sleeve 4 fixed thereto, so that the hinge sleeve 4 tends to rotate around the hinge axis 3.

[0023] Secondly, when the hinge sleeve 4 rotates, it rotates relative to the hinge shaft 3 through the deep groove ball bearing, which simultaneously drives the upper pull rod 5 and the lower support rod 6 connected to it to move synchronously. Since the upper pull rod 5 and the lower support rod 6 are symmetrically distributed in an "L" shape and are located on the outside of the hinge seat 2, their short sides rotate around the hinge shaft 3, while their long sides provide bidirectional support to the hinge arm 7, distributing the load on the door.

[0024] Furthermore, during the load-bearing process, the fixed base plate 1 provides stable support for the hinge shaft 3 through the integrated "U"-shaped hinge seat 2. The hinge shaft 3 transfers the load to the fixed base plate 1, forming a complete force chain from the door body to the fixed frame. The high-temperature resistant and wear-resistant ceramic gasket reduces friction and wear when the components move relative to each other, while blocking heat transfer. Together with the components made of refractory materials, it ensures structural stability in high-temperature environments.

[0025] Finally, throughout the entire process, the precise fit of the bearings ensures smooth rotation, while the anti-loosening washers and high-strength bolts ensure that all connecting parts remain secure, allowing the hinges to maintain high load-bearing capacity and fire resistance while enabling the door to open and close flexibly.

[0026] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A fireproof, high-load-bearing bearing hinge, characterized in that, The assembly includes a fixed base plate (1), a hinge seat (2), a hinge shaft (3), a hinge sleeve (4), an upper pull rod (5), a lower support rod (6), a hinge arm (7), and a hinge base plate (8). The fixed base plate (1) is integrally provided with two opposing hinge seats (2). The hinge shaft (3) is rotatably mounted on the hinge seat (2) via bearings, and the hinge sleeve (4), the upper pull rod (5), and the lower support rod (6) are mounted on the hinge shaft (3) via bearings. The hinge arm (7) mounted on the hinge sleeve (4) is connected to the hinge base plate (8), and the hinge arm (7) is connected to one end of the upper pull rod (5) and the lower support rod (6).

2. The fireproof high-load bearing hinge as described in claim 1, characterized in that: The two hinge seats (2) on the fixed base plate (1) are both U-shaped structures. The hinge sleeve (4), upper pull rod (5) and lower support rod (6) are all rotatably mounted on the hinge shaft (3) of the two hinge seats (2) through bearings, and high temperature resistant and wear resistant ceramic pads are provided between them.

3. The fireproof high-load bearing hinge as described in claim 2, characterized in that: The upper pull rod (5) and the lower support rod (6) are arranged opposite to each other and are both "L" shaped structures. One end of the upper pull rod (5) is rotatably connected to the end of the hinge shaft (3). The upper pull rod (5) is located above the lower support rod (6).

4. The fireproof high-load bearing hinge as described in claim 3, characterized in that: The hinge shaft (3) is rotatably mounted on the hinge sleeve (4) through a bearing in the middle and is located between the two hinge seats (2). The hinge sleeve (4), the upper pull rod (5) and the lower support rod (6) can move in a circular trajectory along the axis of the hinge shaft (3).

5. A fireproof, high-load-bearing bearing hinge as described in claim 4, characterized in that: The upper pull rod (5) and the lower support rod (6) are fixed at opposite ends to the surface of the hinge arm (7) integrally provided on the hinge sleeve (4). The hinge arm (7) is a triangular geometric structure. One side of the hinge arm (7) is fixedly connected to the side of the hinge base plate (8) perpendicular to the ground.

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