hinge mechanism

Abstract

Hinge mechanism comprising a rotating assembly (1), characterized in that the rotating assembly (1) includes a first sleeve (10) and a second sleeve (11), wherein a first cover cap (12) is inserted and attached to the end of the first sleeve (10) facing away from the coupling point with the second sleeve (11), and a second cover cap (13) is inserted and attached to the end of the second sleeve (11) facing away from the coupling point with the first sleeve (10); wherein a first hinge leaf assembly (2) is arranged on the first sleeve (10), comprising a first mounting sleeve (20) and a movable hinge leaf (21), wherein the first mounting sleeve (20) is fixedly attached to the outer surface of the first sleeve (10); and wherein a second hinge leaf assembly (3) is provided on the second sleeve (11), comprising a second mounting sleeve (30) and a fixed hinge leaf (31), wherein the second mounting sleeve (30) is fixedly attached to the outer surface of the second sleeve (11).

Description

Technical field

[0001] The present utility model relates to the technical field of metal fittings and specifically to a hinge mechanism. Background technology

[0002] A hinge, also known as a joint, is a mechanical device that connects two rigid bodies and allows them to rotate relative to one another. As one of the oldest connecting elements in human history, the hinge can be traced back to the Bronze Age. Its basic function—opening and closing objects through rotational movement—remains an indispensable principle in fields such as construction, furniture manufacturing, and mechanical engineering.

[0003] The basic structure of modern hinges consists of three main parts: the fixed hinge leaf, the movable hinge leaf, and the pivot point. The fixed hinge leaf is attached to stationary components such as door frames or housings by screws or welding, while the movable hinge leaf is connected to moving elements such as door leaves or cover plates. The pivot point serves as the central transmission element and can be either a traditional cylindrical pin or a multi-row ball bearing assembly.

[0004] Currently, most hinge assemblies feature two hinge leaves with identical dimensions and specifications. This means that when installing heavy door leaves, a reinforced connection appropriate to the actual safety requirements cannot be achieved. Consequently, there is an uneven distribution of force between the moving and fixed hinge leaves. Furthermore, the pivot point where the fixed and moving hinge leaves are connected is typically assembled using an interference fit. If one of the hinge leaves becomes unstable or requires maintenance, replacing individual components is relatively complex. During disassembly, excessive force can easily deform or damage the otherwise intact hinge leaves. Content of the utility model

[0005] To remedy the aforementioned deficiencies, the present utility model provides a technical solution that overcomes or at least partially solves the problems described.

[0006] The utility model relates to a hinge mechanism comprising a rotating assembly. The rotating assembly consists of a first sleeve and a second sleeve. A first cover cap is inserted and attached to the end of the first sleeve furthest from the coupling point with the second sleeve; likewise, a second cover cap is inserted and attached to the end of the second sleeve furthest from the coupling point with the first sleeve.

[0007] A first hinge leaf assembly is arranged on the first sleeve, comprising a first mounting sleeve and a movable hinge leaf, the first mounting sleeve being fixed to the outer surface of the first sleeve.

[0008] The second sleeve is provided with a second hinge leaf assembly comprising a second mounting sleeve and a fixed hinge leaf, the second mounting sleeve being fixed to the outer surface of the second sleeve.

[0009] Preferably, an end plate is attached to the end face of the first sleeve facing the second sleeve. A shaft is mounted on the opposite side of the end plate, its surface encased in a seal. The seal is located at the junction between the end plate and the second sleeve.

[0010] Preferably, a mounting head is permanently installed at the end of the shaft located inside the second sleeve, with the outer wall of the mounting head sliding against the inner wall of the second sleeve.

[0011] Preferably, a bearing is mounted on the surface of the shaft, the inner ring wall of which is connected to the surface of the shaft by a press fit, while the outer ring of the bearing slides against the inner wall of the second sleeve.

[0012] Preferably, a threaded bore penetrating the interior is provided on one side of the second sleeve, into which a fastening screw is screwed. A threaded groove is formed on the outer ring wall of the bearing, and the inner end of the fastening screw is screwed into the inner wall of the threaded groove.

[0013] Preferably, a movable hinge leaf is firmly attached to the surface of the first mounting sleeve, in the surface of which a first mounting hole penetrating the interior is formed, which is rectangular in shape.

[0014] Preferably, the first mounting holes are arranged at both ends of the movable hinge leaf. A limiting hole is provided between the two mounting holes, the inner wall of which has a recess on one side.

[0015] Preferably, a fixed hinge leaf is firmly attached to the surface of the second mounting sleeve, wherein the fixed hinge leaf has an L-shaped structure.

[0016] Preferably, several second mounting holes penetrating the interior are formed on the surface of the fixed hinge leaf, arranged in two rows.

[0017] Preferably, the second mounting holes are round, and their inner surfaces are smooth or threaded.

[0018] The technical solution provided by the present utility model has the following advantageous effects: 1. The arrangement of the first and second end caps effectively seals the open ends of the first and second sleeves. During normal operation of the hinge pivot, this prevents the ingress of dust, fine particles, and moisture into the interior of the pivot. This avoids problems such as jamming, unusual noises, or abnormal wear due to contamination. Consequently, the long-term reliability of the hinge under various environmental conditions is significantly improved, and its service life is extended. 2. The rotary assembly utilizes the interaction of the end plate, seal, shaft, mounting head, and bearing. The seal between the end plate and the second sleeve reduces wear and provides protection, while the shaft is slidably connected to the inner wall of the second sleeve via the mounting head and is stably supported by the bearing. This results in a smoother and more consistent rotation of the first sleeve relative to the second sleeve, thereby reducing vibrations and noise. Simultaneously, structural rigidity and rotational precision are increased when supporting door leaves or similar components. 3. The rectangular mounting hole in the movable hinge leaf, combined with a countersunk guide hole, allows for quick positioning and alignment with the door leaf or other components during the initial installation phase. The L-shaped fixed hinge leaf, with multiple round mounting holes secured via screws or bolts at several fixing points, ensures a high strength and stability of the connection to the door frame or wall. This effectively prevents loosening due to long-term use or stress. Description of the drawings

[0019] To better illustrate the technical solution of the embodiments of the present utility model, the drawings used in these embodiments are briefly explained below. It should be understood that the following drawings only depict specific embodiments of the utility model and are therefore not to be considered as limiting the scope of protection. Those skilled in the art can create further related drawings based on these illustrations without inventive step. Fig. Figure 1 shows a schematic representation of the arrangement of the individual components of the device described in the embodiment of the present utility model. Fig. is a schematic representation of the front view of the overall construction of the embodiment. Fig. shows a schematic rear view of the overall construction of the embodiment. Fig. represents a schematic side view of the overall construction of the embodiment. Fig. shows a schematic representation of the internal structure of the first and second sleeves in the embodiment. Fig. is an enlarged representation of area A in Fig. .

[0020] The illustrations show: 1 - rotating assembly; 10 - first sleeve; 11 - second sleeve; 12 - first cover cap; 13 - second cover cap; 14 - seal; 15 - end plate; 16 - shaft; 17 - mounting head; 18 - bearing; 101 - threaded hole; 102 - mounting screw; 103 - threaded groove; 2 - first hinge leaf assembly; 20 - first mounting sleeve; 21 - movable hinge leaf; 22 - first mounting hole; 23 - stop hole; 3 - second hinge leaf assembly; 30 - second mounting sleeve; 31 - fixed hinge leaf; 32 - second mounting hole. Specific embodiments

[0021] To clarify the purpose, technical solution, and advantages of the embodiment of this utility model, the technical solution of the embodiment is described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments represent only some, but not all, possible embodiments of the utility model. Based on the embodiments described in this utility model, all further embodiments that can be developed by persons skilled in the art in this field without inventive step are within the scope of protection of this utility model.

[0022] With reference to Fig. , Fig. , Fig. , Fig. , Fig. until Fig.The present utility model provides a technical solution: a hinge mechanism comprising a rotating assembly (1). The rotating assembly (1) consists of a first sleeve (10) and a second sleeve (11). A first cover cap (12) is inserted and attached to the end of the first sleeve (10) facing away from the coupling point with the second sleeve (11); likewise, a second cover cap (13) is inserted and attached to the end of the second sleeve (11) facing away from the coupling point with the first sleeve (10). The first cover cap (12) and the second cover cap (13) close the open end regions of the sleeves, while the first sleeve (10) and the second sleeve (11) together form the pivot pin of the hinge, thus providing protection against dust and splashing water.

[0023] A first hinge leaf assembly (2) is arranged on the first sleeve (10), comprising a first mounting sleeve (20) and a movable hinge leaf (21). The first mounting sleeve (20) is fixedly attached to the outer surface of the first sleeve (10). Based on the second sleeve (11), the first sleeve (10) can rotate stably when opening or closing objects such as door frames or door leaves. The movable hinge leaf (21) rotates together with the first sleeve (10) via the first mounting sleeve (20).

[0024] A second hinge leaf assembly (3) is provided on the second sleeve (11), comprising a second mounting sleeve (30) and a fixed hinge leaf (31). The second mounting sleeve (30) is fixedly attached to the outer surface of the second sleeve (11), while the fixed hinge leaf (31) is connected to the second sleeve (11), which can be spot-fixed, via the second mounting sleeve (30).

[0025] An end plate (15) is attached to the end face of the first sleeve (10) facing the second sleeve (11). A shaft (16) is mounted on the opposite side of the end plate (15), the surface of which is encased in a seal (14). The seal (14) is located at the connection point between the end plate (15) and the second sleeve (11) and ensures that the area of ​​rotation between the end plate (15) and the second sleeve (11) remains protected from wear during the rotation of the first sleeve (10) relative to the second sleeve (11).

[0026] The shaft (16) is rigidly connected at its end located inside the second sleeve (11) to a mounting head (17). The outer wall of the mounting head (17) is slidably connected to the inner wall of the second sleeve (11), thereby ensuring a stable and rotationally fixed mounting of the inner end of the shaft (16) within the second sleeve (11).

[0027] A bearing (18) is mounted on the surface of the shaft (16). The inner ring of the bearing (18) is press-fitted to the surface of the shaft (16), while the outer ring of the bearing (18) slides against the inner wall of the second sleeve (11). The shaft (16) can rotate over the bearing (18); when the bearing (18) is fixedly mounted within the second sleeve (11), it allows the shaft (16) to rotate the first sleeve (10) stably relative to the second sleeve (11).

[0028] A through-hole (101) is formed on one side of the second sleeve (11), into which a fastening screw (102) is screwed. A threaded groove (103) is located on the outer ring wall of the bearing (18). The inwardly facing end of the fastening screw (102) is screwed into the inner wall of the threaded groove (103). When the bearing (18) is located inside the second sleeve (11), it can be firmly connected to the threaded groove (103) by screwing the fastening screw (102) into the threaded hole (101), thus securely fixing the bearing (18) in the second sleeve (11).

[0029] A movable hinge leaf (21) is fixedly attached to the surface of the first mounting sleeve (20). A rectangular first mounting hole (22) is formed in the surface of the movable hinge leaf (21), penetrating the interior. The movable hinge leaf (21) can be connected and fastened to an active, rotatable component, such as a door or a cover.

[0030] The first mounting holes (22) are located at both ends of the movable hinge leaf (21). Between the two mounting holes (22) is a limiting hole (23), the inner wall of which has a recess on one side. The mounting holes (22) serve to screw the movable hinge leaf (21) to the rotating component, while the limiting hole (23), together with the recess, forms a guide notch that enables initial insertion and positioning alignment with the mounting point of the rotating component.

[0031] A fixed hinge leaf (31) with an L-shaped structure is permanently attached to the surface of the second mounting sleeve (30). The fixed hinge leaf (31) can be attached to walls or frame structures and serves as a pivot point for the actively movable component.

[0032] Several secondary mounting holes (32) are formed on the surface of the fixed hinge leaf (31). These holes completely penetrate the hinge leaf and are arranged in two rows. By inserting screws through the mounting holes (32) and using multi-point fastening, a stable connection between the fixed hinge leaf (31) and the designated fastening points can be ensured.

[0033] The second mounting holes (32) are round, and their inner surfaces are smooth or threaded, so that the fixed hinge leaf (31) can be securely mounted using screws or bolts that pass through the mounting holes (32).

[0034] In this specific embodiment, the central rotational function of the hinge mechanism is primarily achieved through the precise fit between the first sleeve (10) and the second sleeve (11). The first sleeve (10) serves to set door leaves or other movable components into rotational motion, its end being rigidly connected to a shaft (16) via an end plate (15). This shaft (16) projects into the interior of the second sleeve (11), at the end of which a mounting head (17) is attached. The outer wall of the mounting head (17) is in sliding contact with the inner wall of the second sleeve (11), thus ensuring the radial stability of the shaft end during rotation, thereby preventing oscillation or lateral deviation.To achieve a smoother and more durable rotational motion, a bearing (18) is mounted on the shaft (16). The inner ring of the bearing is press-fitted to the surface of the shaft (16), ensuring synchronous rotation of both components. The outer ring of the bearing (18) is slidably connected to the inner wall of the second sleeve (11). The key fastening system consists of a threaded bore (101) in the side wall of the second sleeve (11). A fastening screw (102) can be screwed into this bore, engaging directly in the threaded groove (103) machined on the outer ring of the bearing (18). Tightening the fastening screw (102) securely locks the outer ring of the bearing (18) inside the second sleeve (11).When an external force sets the first sleeve (10) into rotation, this force is transferred via the end plate (15) to the shaft (16), which rotates with low friction and high precision within the stationary second sleeve (11) with the aid of the bearing (18), thus ensuring that the entire hinge movement is stable and uniform.

[0035] At the opposite ends of the two main rotating sleeves, the first sleeve (10) and the second sleeve (11), a first cover cap (12) and a second cover cap (13) are inserted and fastened. These two cover caps effectively seal the hollow interior of the sleeves and prevent dust, moisture, or other contaminants from penetrating the internal rotating areas of the first sleeve (10) and the second sleeve (11). This reliably protects the precision components inside, such as the shaft (16), the mounting head (17), and the bearing (18), and extends the service life of the entire device. Furthermore, a special wear protection structure is provided at the contact surfaces of the rotating components: A seal (14) is mounted between the end plate (15) of the first sleeve (10) and the end face of the second sleeve (11), surrounding the surface of the shaft (16).This seal (14) is located between the two relatively movable components and, when the end plate (15) is frequently rotated, acts as a buffer and insulating layer against the second sleeve (11), absorbing most of the friction and pressure load and thus effectively preventing direct wear between the end plate (15) and the end face of the second sleeve (11).

[0036] The connection of the moving parts is achieved by the first hinge leaf assembly (2), which comprises a first mounting sleeve (20) fixedly mounted on the outer surface of the first sleeve (10) and a movable hinge leaf (21) fixedly connected thereto. Mounting holes (22) for screw fastening are located on the movable hinge leaf (21). These holes are rectangular and arranged at both ends of the hinge leaf. This shape helps to prevent the fasteners from loosening during use. The arrangement of a special limiting hole (23) between the two mounting holes (22) is particularly advantageous; the inner wall of this limiting hole has a recess on one side.The structure formed by the limiting hole (23) and the recess allows the hinge leaf to be initially connected to the corresponding starting fixing point on the door during assembly, enabling quick pre-positioning and precise alignment. Final fixing can then be conveniently achieved using screws via the mounting holes (22), significantly improving assembly accuracy and work efficiency. The connection of the fixed base element is made by the second hinge leaf assembly (3), which comprises a second mounting sleeve (30) fixedly mounted on the outer surface of the second sleeve (11) and a fixed hinge leaf (31) firmly connected to it. The fixed hinge leaf (31) is L-shaped to be ideally suited for mounting on wall corners or frame structures.Its surface features two rows of round mounting holes (32), the inner walls of which can be smooth or threaded to accommodate various screws or bolts. This multi-point, distributed fastening significantly increases the connection strength and stability between the fixed hinge leaf (31) and the mounting base – such as a door frame or wall – ensuring that the hinge maintains high strength and long-term stability even under prolonged stress and repeated opening and closing.

[0037] The foregoing description merely represents a preferred specific embodiment of the present utility model; however, the scope of protection of the utility model is not limited thereto. Any person skilled in the art in this technical field who, within the technical framework disclosed by the present utility model, makes equivalent changes or modifications based on the technical solutions and inventive idea of ​​the utility model, also falls within the scope of protection of the present utility model.

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