A door hinge which is easy to assemble and stable in connection

Abstract

The application discloses a door hinge which is convenient to assemble and stable in connection, comprising two hinge leaves, a shaft core and a flat head, the hinge leaves are provided with at least one connecting ring which is matched with the shaft core, the hinge leaves are rotatably connected with the shaft core through the connecting ring, the positions of the connecting rings on the two hinge leaves are staggered with each other, the flat head is installed at the outer end of the connecting ring at the two ends of the shaft core, the flat head comprises a head part and a connecting column which is vertically arranged at the lower end of the head part and matched with the inner cavity of the connecting ring, a convex ring is annularly arranged on the outer wall surface of the lower part of the connecting column, the cross section of the convex ring is triangular or arc-shaped, the inner cavity of the connecting ring at the two ends of the shaft core is annularly provided with a clamping groove formed by concave, the clamping groove is matched with the convex ring, the flat head is installed in the connecting ring through an axial pressing mode, the convex ring is clamped into the clamping groove, and the flat head is fixed with the connecting ring through clamping. The clamping structure of the convex ring and the clamping groove realizes the pressing and locking of the flat head, the stable connection can be ensured without interference fit, and the door hinge has the advantages of convenient assembly, reliable connection and low cost.

Description

Technical Field

[0001] This invention relates to the field of door hinge technology, and in particular to a door hinge that is easy to assemble and has a stable connection. Background Technology

[0002] A door hinge, also known as a door hinge, is a component that connects two parts of an object and allows them to move. It generally includes two hinge blades, a shaft, bearings, and a flat head. The connecting rings of the hinge blades and the bearings are mounted on the shaft. The two hinge blades can rotate, and the flat head is inserted into the ends of the connecting rings located at both ends. Existing flat heads typically use an interference fit, directly pressing into the connecting rings and relying on the pressure between the insert and the mounting hole for fixation. However, this structure has significant shortcomings in practical use: firstly, the door hinge is subjected to repeated loads during use, causing the mounting hole to gradually deform, leading to the flat head loosening or even falling off due to deformation; secondly, interference fits require high machining precision. To ensure sufficient friction, the insert often needs to be designed to be longer and incorporate a knurling process, making the manufacturing process complex and increasing costs. Summary of the Invention

[0003] The purpose of this invention is to provide a door hinge that is easy to assemble and has a stable connection. It aims to overcome the defects of existing flat-head hinges, such as easy loosening and falling off, high processing precision requirements, and complex processes, which are caused by interference fit. By using the snap-fit ​​fixing structure between the flat-head hinge and the connecting ring, the flat-head hinge can be quickly installed and prevented from falling off for a long time, thus solving the above-mentioned problems in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides a door hinge that is easy to assemble and has a stable connection, comprising two hinge blades, a shaft, and a flat head. Each hinge blade is provided with at least one connecting ring adapted to the shaft. The hinge blade is rotatably connected to the shaft via the connecting ring. The connecting rings on the two hinge blades are staggered. The flat head is installed on the outer end of the connecting ring located at both ends of the shaft. The flat head includes a head and a connecting post located vertically at the lower end of the head and adapted to the inner cavity of the connecting ring. A convex ring is provided on the outer wall surface of the lower part of the connecting post. The cross-section of the convex ring is triangular or arc-shaped. The inner cavity of the connecting ring located at both ends of the shaft is provided with a recessed groove. The groove is adapted to the convex ring. The flat head is installed in the connecting ring by axial pressing. The convex ring is engaged in the groove, so that the flat head and the connecting ring are fixed by engagement.

[0005] Furthermore, the hinge, the shaft, and the flat end are all made of steel.

[0006] Furthermore, it also includes a bearing, which is mounted on the shaft and located between two adjacent connecting rings.

[0007] Furthermore, one of the hinges has two connecting rings, and the other hinge has three connecting rings.

[0008] Furthermore, the cross-sectional shape of the slot matches the cross-sectional shape of the convex ring.

[0009] Furthermore, the cross-sections of both the convex ring and the slot are right-angled triangles.

[0010] Compared with the prior art, the beneficial technical effects of the present invention are as follows: The door hinge of this invention, which is easy to assemble and has a stable connection, features a protruding ring on the lower outer wall of the flat-head connecting post and a recessed groove in the inner cavity of the hinge connecting ring that matches the protruding ring. When the flat head is pressed into the connecting ring, the protruding ring engages in the groove, thus fixing the flat head and the connecting ring together. The axial mechanical locking formed by the protruding ring and the groove eliminates the need for friction generated by interference fits, fundamentally preventing the flat head from loosening and falling off due to deformation of the mounting hole, ensuring long-term safety and reliability. Furthermore, the flat head is installed using an axial press-in method, which achieves immediate engagement in one step. Compared to existing interference fit methods that require lengthened inserts and knurling, this significantly reduces the requirements for machining accuracy, resulting in higher assembly efficiency and lower manufacturing costs. In addition, the engagement structure of the protruding ring and the groove is compact, requiring no additional fasteners, and there is no thermal stress or material loss during engagement. Combined with the use of steel materials, this further extends the overall service life of the door hinge. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a cross-sectional view of the door hinge of the present invention, which is easy to assemble and has a stable connection. Figure 2 This is a cross-sectional view of the hinge leaf in the door hinge of the present invention, which is easy to assemble and has a stable connection. Figure 3 This is a cross-sectional view of the central shaft of the door hinge of the present invention, which is easy to assemble and has a stable connection. Figure 4 This is a cross-sectional view of the bearing in the door hinge of the present invention, which is easy to assemble and has a stable connection. Figure 5 This is a cross-sectional view of the flat head of the door hinge of the present invention, which is easy to assemble and has a stable connection.

[0013] Explanation of reference numerals in the attached diagram: 1. Hinge; 11. Connecting ring; 12. Slot; 2. Shaft core; 3. Bearing; 4. Flat head; 41. Raised ring. Detailed Implementation

[0014] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0015] In the description of this invention, it should be understood that the terms "length," "width," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Example 1 like Figures 1 to 5As shown, the door hinge of this embodiment 1, which is easy to assemble and has a stable connection, includes two hinge blades 1, a shaft core 2, and a flat head 4. The hinge blade 1 is provided with at least one connecting ring 11 that is adapted to the shaft core 2. The hinge blade 1 is rotatably connected to the shaft core 2 through the connecting ring 11. The connecting rings 11 on the two hinge blades 1 are staggered. The flat head 4 is installed on the outer end of the connecting ring 11 located at both ends of the shaft core 2. The flat head 4 includes a head and a connecting post located vertically at the lower end of the head and adapted to the inner cavity of the connecting ring 11. A convex ring 41 is provided on the outer wall surface of the lower part of the connecting post. The cross-section of the convex ring 41 is triangular or arc-shaped. The inner cavity of the connecting ring 11 located at both ends of the shaft core 2 is provided with a recessed groove 12. The groove 12 is adapted to the convex ring 41. The flat head 4 is installed in the connecting ring 11 by axial pressing. The convex ring 41 is inserted into the groove 12, so that the flat head 4 and the connecting ring 11 are fixed by engaging.

[0019] Preferably, the hinge 1, the shaft core 2, and the flat head 4 are all made of steel.

[0020] Furthermore, it also includes a bearing 3, which is mounted on the shaft core 2 and located between two adjacent connecting rings 11.

[0021] Furthermore, the cross-sectional shape of the slot 12 matches the cross-sectional shape of the protruding ring 41.

[0022] Example 2 The door hinge of this embodiment 2, which is easy to assemble and has a stable connection, includes two hinge leaves 1, a shaft core 2, multiple bearings 3, and two flat heads 4. One hinge leaf 1 has two connecting rings 11 that are adapted to the shaft core 2, and the other hinge leaf 1 has three connecting rings 11 that are adapted to the shaft core 2. The connecting rings 11 on the two hinge leaves 1 are positioned to cross each other. The two hinge leaves 1 are rotatably connected to the shaft core 2 through the connecting rings 11. The bearings 3 are installed on the shaft core 2 and are located between two adjacent connecting rings 11. The flat heads 4 are installed on the outer ends of the connecting rings 11 located at both ends of the shaft core 2.

[0023] The flat head 4 includes a head and a connecting post located vertically at the lower end of the head, which is adapted to the inner cavity of the connecting ring 11. A protruding ring 41 is provided on the outer wall surface of the lower part of the connecting post. The inner cavity of the connecting ring 11 located at both ends of the shaft core 2 is provided with a recessed groove 12 adapted to the protruding ring 41. Preferably, the cross-section of the protruding ring 41 and the groove 12 is a right triangle.

[0024] In this embodiment, a protruding ring 41 is provided at the lower part of the flat head 4, and a groove 12 adapted to the protruding ring 41 is provided in the inner cavity of the connecting ring 11 of the hinge 1. When the flat head 4 is pressed into the corresponding connecting ring 11, the protruding ring 41 is engaged in the groove 12, so that the flat head 4 is fixed at the end of the connecting ring 11 of the hinge 1. The connection structure has strong stability, and the flat head 4 will not fall off, ensuring safety. Moreover, the installation of the flat head 4 can be completed simply by pressing the flat head 4 into the connecting ring 11, making the installation operation simple and the structure stable.

[0025] Furthermore, hinge 1, shaft core 2, and flat head 4 are all made of steel.

[0026] In summary, this invention provides a convex ring at the lower part of the flat-head connecting post and a corresponding groove in the inner cavity of the connecting ring. When the flat head is pressed in, the convex ring engages with the groove to form an axial lock. This achieves a stable and anti-dislodgement mechanism without interference fit, and installation can be completed simply by pressing in. It has the advantages of reliable connection, convenient assembly, and low cost.

[0027] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A door hinge that is easy to assemble and provides a secure connection, characterized in that, The device includes two hinges, a shaft, and a flat head. Each hinge has at least one connecting ring that matches the shaft. The hinges are rotatably connected to the shaft via the connecting rings. The connecting rings on the two hinges are staggered. The flat head is installed on the outer end of the connecting rings located at both ends of the shaft. The flat head includes a head and a connecting post located vertically below the head and matched with the inner cavity of the connecting ring. A convex ring is provided on the outer wall surface of the lower part of the connecting post. The convex ring has a triangular or arc-shaped cross-section. The inner cavity of the connecting rings located at both ends of the shaft has a recessed groove that matches the convex ring. The flat head is installed in the connecting ring by axial pressing. The convex ring is engaged in the groove, so that the flat head and the connecting ring are fixed by engagement.

2. The door hinge that is easy to assemble and has a stable connection according to claim 1, characterized in that, The hinge, the shaft, and the flat end are all made of steel.

3. The door hinge that is easy to assemble and has a stable connection according to claim 1, characterized in that, It also includes a bearing, which is mounted on the shaft and located between two adjacent connecting rings.

4. The door hinge that is easy to assemble and has a stable connection according to claim 1, characterized in that, One of the hinges has two connecting rings, and the other hinge has three connecting rings.

5. The door hinge that is easy to assemble and has a stable connection according to any one of claims 1-4, characterized in that, The cross-sectional shape of the slot matches the cross-sectional shape of the convex ring.

6. The door hinge that is easy to assemble and has a stable connection according to claim 5, characterized in that, Both the convex ring and the slot have right-angled triangle cross-sections.

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