Heavy duty door hinge

Abstract

The utility model relates to a hinge field especially relates to a heavy door hinge. The heavy door hinge includes hinge seat bottom plate, one side of hinge seat bottom plate is provided with hinge base, hinge seat bottom plate and hinge base are horizontally arranged, wherein, the top of hinge seat bottom plate is provided with rotating part, and hinge base can revolve around hinge seat bottom plate through rotating part, the top of hinge base is provided with connecting piece, and hinge base is connected with rotating part through connecting piece. The heavy door hinge provided by the utility model adopts the design that the cylindrical roller bearing is combined with the thrust ball bearing, the cylindrical roller bearing can bear the large radial load generated by the door body, the thrust ball bearing can effectively cope with the axial load, both work together, greatly improve the bearing capacity of the hinge, ensure that the hinge can still operate stably under the condition of long-term bearing the weight of the heavy door, and is not prone to deformation or damage.

Description

Technical Field

[0001] This utility model relates to the field of hinges, and more particularly to a heavy-duty door hinge. Background Technology

[0002] In modern buildings and industrial facilities, heavy-duty doors are widely used in places such as warehouses, factories, and large equipment rooms. Due to their significant weight and high frequency of use, these heavy-duty doors place extremely stringent demands on hinge performance. Traditional heavy-duty door hinges have revealed several problems in practical applications: First, in terms of load-bearing capacity, their structural design often cannot effectively cope with the enormous weight of heavy-duty doors. After long-term use, the hinges are prone to deformation and breakage, causing the door to sag, making opening and closing difficult, severely impacting the user experience, and even potentially posing safety hazards. Second, in terms of rotational performance, traditional hinges often use simple bushings or a single type of bearing, which cannot simultaneously handle radial and axial loads. During the opening and closing process, the friction is high, making operation not only laborious but also accelerating component wear and shortening the hinge's lifespan.

[0003] Therefore, it is necessary to provide a new heavy-duty door hinge to solve the above-mentioned technical problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a heavy-duty door hinge is provided to solve the above-mentioned problems.

[0005] The heavy-duty door hinge provided by this utility model includes: a hinge base plate; a hinge base is provided on one side of the hinge base plate, and the hinge base plate and the hinge base are horizontally arranged; wherein, a rotating member is provided at the top of the hinge base plate, and the hinge base can be rotated along the hinge base plate by the rotating member; a connecting member is provided at the top of the hinge base, and the hinge base is connected to the rotating member by the connecting member.

[0006] Preferably, the rotating component includes two hinge seat brackets connected to the top of the hinge seat base plate, and the two hinge seat brackets are arranged opposite to each other. Cylindrical roller bearings are provided on the inner side of the two hinge seat brackets on the side that is far apart from each other. The outer rings of the two cylindrical roller bearings are respectively connected to the inner side of the hinge seat brackets, and the inner rings of the two cylindrical roller bearings are connected to the hinge shaft.

[0007] Preferably, both ends of the outer side of the hinge shaft are connected to retaining rings, and the two retaining rings are located on the opposite sides of the two cylindrical roller bearings.

[0008] Preferably, the connector includes two thrust ball bearings connected to the outside of the hinge shaft, and both thrust ball bearings are located between two hinge seat supports, with a hinge shaft sleeve connecting the two thrust ball bearings together.

[0009] Preferably, the hinge bushing has two hinge side stiffeners connected to the side near the hinge base, and the two hinge side stiffeners are arranged opposite each other. The bottom of the two hinge side stiffeners on the side away from the hinge bushing is connected to the top of the hinge base, and a hinge cross stiffener is connected between the two hinge side stiffeners.

[0010] Preferably, hinge cover plates are installed on the outer sides of the two hinge side stiffeners.

[0011] Compared with related technologies, the heavy-duty door hinge provided by this utility model has the following advantages:

[0012] This invention employs a design combining cylindrical roller bearings and thrust ball bearings. The cylindrical roller bearings can withstand the large radial load generated by the door, while the thrust ball bearings can effectively handle the axial load. The two work together to greatly enhance the load-bearing capacity of the hinge, ensuring that the hinge can still operate stably under the long-term load of heavy doors and is not prone to deformation or damage.

[0013] The use of rolling bearings in this invention significantly reduces frictional resistance during rotation. When the door opens and closes, the hinge shaft can rotate flexibly with the support of cylindrical roller bearings. Combined with the stable support of thrust ball bearings for axial force, the opening and closing of the door is easier and smoother, effectively improving the convenience of use. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the heavy-duty door hinge provided by this utility model;

[0015] Figure 2 for Figure 1 The diagram shown is a front view of the structure.

[0016] Figure 3 for Figure 1 The diagram shown is a top view of the structure.

[0017] Figure 4 for Figure 1 The diagram shown is a top view of the structure.

[0018] The following are the labels in the diagram: 1. Hinge seat base plate; 2. Hinge seat bracket; 3. Thrust ball bearing; 4. Hinge base; 5. Hinge side stiffener; 6. Hinge bushing; 7. Hinge cross stiffener; 8. Hinge cover plate; 9. Retaining ring; 10. Hinge shaft; 11. Cylindrical roller bearing. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] This utility model provides a heavy-duty door hinge, which includes: a hinge base plate 1; a hinge base 4 is provided on one side of the hinge base plate 1, and the hinge base plate 1 and the hinge base 4 are horizontally arranged; wherein, a rotating member is provided at the top of the hinge base plate 1, and the hinge base 4 can be rotated along the hinge base plate 1 by means of the rotating member; a connecting member is provided at the top of the hinge base 4, and the hinge base 4 is connected to the rotating member by means of the connecting member.

[0022] It should be noted that: the hinge base plate 1, as the basic support component of the entire hinge, is used to securely connect to the door frame or mounting surface. It provides a stable mounting platform for other hinge components, ensuring that the hinge can withstand the weight of the door and various external forces during use without displacement or loosening. The hinge base 4 is mainly used to connect the door body and is the direct connection between the door body and the hinge. It enables the door to rotate through cooperation with the rotating component and the connecting component. Because the hinge base 4 and the hinge base plate 1 are horizontally positioned, this layout makes the door more stable when opening and closing, reducing door tilting or jamming caused by unreasonable hinge structure. The rotating component is located at the top of the hinge base plate 1 and is the core component that enables the hinge base 4 to revolve around the hinge base plate 1. The connecting component is located at the top of the hinge base 4 and serves to connect the hinge base 4 and the rotating component.

[0023] In an embodiment of this utility model, the rotating component includes two hinge seat supports 2 connected to the top of the hinge seat base plate 1, and the two hinge seat supports 2 are arranged opposite to each other. Cylindrical roller bearings 11 are provided on the inner side of the side of the two hinge seat supports 2 that are relatively far apart. The outer rings of the two cylindrical roller bearings 11 are respectively connected to the inner side of the hinge seat support 2. The inner rings of the two cylindrical roller bearings 11 are connected to the hinge shaft 10. The outer ends of the hinge shaft 10 are connected to retaining rings 9, and the two retaining rings 9 are respectively located on the side of the two cylindrical roller bearings 11 that are relatively far apart.

[0024] It should be noted that the two opposing hinge seat brackets 2 form the basic support structure for the rotating components. Fixed to the top of the hinge seat base plate 1, they provide mounting positions for components such as the cylindrical roller bearing 11 and the hinge shaft 10, ensuring the relative positional accuracy of these components during operation. Their opposing arrangement evenly distributes the forces from the hinge shaft 10 and the door body, enhancing the overall stability of the rotating components and allowing the hinge to maintain good structural strength even under the weight of the door and external forces during opening and closing. The cylindrical roller bearing 11 is installed on the inner side of the hinge seat bracket 2, away from the side opposite to the door, and is primarily responsible for bearing radial loads. During the opening and closing of a heavy-duty door, the weight of the door generates a significant radial force. The cylindrical roller bearing 11 has line contact between its rollers and raceways, allowing it to withstand a greater radial load compared to other types of bearings. This effectively reduces the coefficient of friction between the hinge shaft 10 and the hinge seat bracket 2, enabling the hinge shaft 10 to rotate more smoothly. This, in turn, ensures the hinge base 4 revolves smoothly along the hinge seat base plate 1, improving the flexibility of the door's opening and closing. As the core rotating component, the hinge shaft 10 connects the inner rings of the two cylindrical roller bearings 11, integrating their rotation into a single unit. This ensures the hinge base 4 can revolve stably around it. It not only transmits the weight and external force of the door but also provides a central axis for the installation of the connecting parts, making it a crucial hub for the hinge's rotational function. The retaining rings 9 are installed at both ends of the outer side of the hinge shaft 10, located on the side furthest from the cylindrical roller bearings 11. The retaining rings 9 primarily serve an axial limiting function. During the opening and closing of the door, the hinge shaft 10 may experience axial movement due to various external forces. The retaining ring 9 can effectively limit the axial movement of the hinge shaft 10, ensuring that the cylindrical roller bearing 11, the hinge shaft 10 and other related components always maintain the correct relative position, preventing problems such as increased wear of components, uneven rotation or even hinge damage caused by axial displacement, thereby improving the reliability and service life of the rotating parts.

[0025] In an embodiment of this utility model, the connector includes two thrust ball bearings 3 connected to the outside of the hinge shaft 10, and both thrust ball bearings 3 are located between two hinge seat supports 2. A hinge bushing 6 is connected between the two thrust ball bearings 3. Two hinge side stiffeners 5 are connected to the side of the hinge bushing 6 near the hinge base 4, and the two hinge side stiffeners 5 are arranged opposite each other. The bottom of the side of the two hinge side stiffeners 5 away from the hinge bushing 6 is connected to the top of the hinge base 4. A hinge cross stiffener 7 is connected between the two hinge side stiffeners 5, and a hinge cover plate 8 is installed on the outside of the two hinge side stiffeners 5.

[0026] It should be noted that during the opening and closing of heavy-duty doors, in addition to radial force, the door body also generates axial force due to factors such as gravity and installation angle. The thrust ball bearing 3 is specifically designed to withstand axial loads, ensuring that the hinge can still rotate normally under axial force, avoiding problems such as hinge jamming or damage caused by axial force. Two thrust ball bearings 3 are installed on the outside of the hinge shaft 10 and between the two hinge base brackets 2. Together, they provide stable support for the hinge bushing 6, ensuring that the hinge bushing 6 rotates smoothly around the hinge shaft 10, thereby guaranteeing the stable rotation of the entire connector and the connected hinge base 4. The hinge bushing 6 is fitted between the two thrust ball bearings 3 and cooperates with the hinge shaft 10. It serves to connect the thrust ball bearings 3 and transmit the rotation of the hinge shaft 10 to other components. When the hinge shaft 10 rotates, the hinge bushing 6 rotates accordingly, transmitting the rotation to the connected hinge side stiffener 5, which in turn drives the hinge base 4 to rotate. The hinge bushing 6 reduces direct contact and friction between the hinge shaft 10 and other components, protecting the hinge shaft 10 and extending its service life. The hinge side stiffeners 5 are arranged oppositely, one end connected to the hinge bushing 6 and the other end connected to the hinge base 4. They transmit the rotation of the hinge bushing 6 to the hinge base 4, allowing the hinge base 4 to revolve around the hinge base plate 1 as the hinge shaft 10 rotates, thus realizing the opening and closing function of the door. The oppositely arranged hinge side stiffeners 5 form a stable structural frame, capable of distributing and bearing various forces generated during the opening and closing of the door, enhancing the overall stability and strength of the connectors, and preventing structural deformation due to uneven stress. The hinge cross stiffener 7 connects the two hinge side stiffeners 5, further enhancing the connection strength and stability between them. Together with the hinge side stiffeners 5, it forms a more robust overall structure, better able to withstand the weight of the door and the impact force during opening and closing, improving the hinge's load-bearing capacity and durability. The hinge cover plate 8 is installed on the outside of the two hinge side stiffeners 5. It can prevent dust, debris and other objects from entering the interior of the connector, protect the thrust ball bearing 3, hinge bushing 6 and other components from the influence of the external environment, reduce wear and corrosion, and extend the service life of the components.

[0027] The working principle of the heavy-duty door hinge provided by this utility model is as follows: When the heavy-duty door is opened and closed, the weight of the door and other external forces are transmitted to the entire hinge structure through the hinge base 4. At this time, the cylindrical roller bearing 11 plays its role in bearing radial load. With the line contact between the roller and the raceway, it stably supports the radial force generated by the weight of the door, ensuring that the hinge shaft 10 can rotate smoothly and drive the hinge base 4 to revolve around the hinge seat base plate 1. At the same time, since the door may generate axial force due to factors such as installation angle and uneven weight distribution, the thrust ball bearing 3 begins to play its role, bearing this part of the axial load, ensuring the stability of the hinge in the axial direction, and preventing the hinge shaft 10 from axially moving. During the rotation of the hinge shaft 10, it drives the hinge shaft sleeve 6, which is sleeved on its outer side, to rotate together. The hinge shaft sleeve 6 transmits the rotation to the hinge base 4 through the hinge side rib plate 5, so that the hinge base 4 can revolve around the hinge seat base plate 1 as the hinge shaft 10 rotates, thereby realizing the opening and closing action of the door. The hinge cross stiffener 7 further enhances the connection strength between the hinge side stiffeners 5, ensuring that the entire connecting structure remains stable and is not easily deformed during the transmission of rotation and the bearing of external forces. The hinge cover plate 8 continuously plays a protective role, preventing external dust and debris from entering the hinge, protecting the internal precision components, and maintaining their good working condition. Meanwhile, the retaining ring 9 always provides axial restraint to the hinge shaft 10, ensuring the precise relative position between the hinge shaft 10, cylindrical roller bearing 11, and other components, ensuring stable hinge operation, and achieving smooth and reliable door opening and closing functions.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heavy-duty door hinge, characterized in that, include: Hinge base plate (1); A hinge base (4) is provided on one side of the hinge base plate (1), and the hinge base plate (1) and the hinge base (4) are arranged horizontally; A rotating component is provided at the top of the hinge base plate (1), and the hinge base (4) can revolve around the hinge base plate (1) through the rotating component; The hinge base (4) is provided with a connector at its top, and the hinge base (4) is connected to the rotating part through the connector.

2. The heavy-duty door hinge according to claim 1, characterized in that, The rotating component includes two hinge seat brackets (2) connected to the top of the hinge seat base plate (1), and the two hinge seat brackets (2) are arranged opposite to each other. Cylindrical roller bearings (11) are provided on the inner side of the two hinge seat brackets (2) on the side that is relatively far away from each other. The outer rings of the two cylindrical roller bearings (11) are respectively connected to the inner side of the hinge seat bracket (2), and the inner rings of the two cylindrical roller bearings (11) are connected to the hinge shaft (10).

3. The heavy-duty door hinge according to claim 2, characterized in that, Both ends of the outer side of the hinge shaft (10) are connected to retaining rings (9), and the two retaining rings (9) are located on the opposite sides of the two cylindrical roller bearings (11).

4. The heavy-duty door hinge according to claim 3, characterized in that, The connector includes two thrust ball bearings (3) connected to the outside of the hinge shaft (10), and the two thrust ball bearings (3) are located between the two hinge seat supports (2), and the two thrust ball bearings (3) are connected together by a hinge bushing (6).

5. The heavy-duty door hinge according to claim 4, characterized in that, The hinge bushing (6) is connected to two hinge side stiffeners (5) on the side near the hinge base (4), and the two hinge side stiffeners (5) are arranged opposite to each other. The bottom of the two hinge side stiffeners (5) on the side away from the hinge bushing (6) is connected to the top of the hinge base (4), and the two hinge side stiffeners (5) are connected together by a hinge cross stiffener (7).

6. The heavy-duty door hinge according to claim 5, characterized in that, Hinge cover plates (8) are installed on the outer sides of the two hinge side stiffeners (5).

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