A buffer type door hinge

Abstract

This utility model discloses a buffer-type door hinge, comprising: a base plate, fixedly installed on a mounting base; and a rotating unit, including a central shaft, a pivot, an elastic element, and a buffer element. One end of the central shaft is installed on the base plate via the elastic element, the pivot is rotatably installed on the other end of the central shaft, and the buffer element is disposed on one side of the central shaft. The buffer element is used to slow down the movement tendency of the central shaft. It can provide effective buffering and reduce noise when opening and closing the door.

Description

Technical Field

[0001] This utility model relates to the field of door hinge technology, and in particular to a buffer door hinge. Background Technology

[0002] Door hinges are essential connecting devices widely used between rotating parts of doors, windows, cabinet doors, and other fixtures and their fixed bases. Their main function is to ensure smooth door rotation and maintain stability and durability during use. As people's demands for user experience and safety performance continue to increase, traditional rigid hinges are prone to generating significant impact forces during door opening and closing. This can easily cause noise, damage to the door or mounting wall, and even injure users, especially in strong winds or when excessive force is applied. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a buffer-type door hinge that can provide effective cushioning and reduce noise when opening and closing the door.

[0004] A buffer-type door hinge according to a first aspect of the present invention includes: a base plate, which is fixedly installed on a mounting base; The rotating unit includes a central shaft, a rotating shaft, an elastic element, and a buffer element. One end of the central shaft is mounted to the base plate via the elastic element, the rotating shaft is rotatably mounted to the other end of the central shaft, and the buffer element is disposed on one side of the central shaft to reduce the movement tendency of the central shaft.

[0005] A buffer-type door hinge according to an embodiment of this utility model has at least the following beneficial effects: This buffer-type door hinge connects one end of the central shaft to the base plate via an elastic element, and sets a buffer element on one side of the central shaft, forming a structural system with synergistic elastic support and buffer damping. When the door is subjected to external forces, such as wind or manual pushing and pulling, and rotates rapidly, it causes the pivot and central shaft to tend to displace. At this time, the elastic element is compressed or extended, providing a return force, while the buffer element effectively suppresses the movement tendency of the central shaft, significantly slowing down the overall dynamic response speed of the hinge. This structure not only achieves bidirectional buffering during the opening and closing of the door, effectively reducing impact force and vibration noise, and improving user comfort and safety, but also ensures the flexibility of normal rotation through the separate design of the central shaft and pivot. Simultaneously, the buffering function is integrated inside the rotating unit, resulting in a compact structure, sensitive response, and stable operation, improving the overall durability and reliability of the hinge.

[0006] According to some embodiments of this utility model, the elastic element is a compression spring, and the buffer element is a hydraulic damper. Using a hydraulic damper as a buffer element, the damping characteristics of its internal hydraulic oil generate a smooth and continuous resistance to the movement of the central axis, achieving precise buffering control. This effectively absorbs the kinetic energy generated when the door opens or closes rapidly, significantly reducing noise and vibration.

[0007] According to some embodiments of this utility model, the rotating unit further includes a pressure plate, which is disposed at one end of the central shaft and abuts against the trigger end of the buffer component; the pressure plate has a through hole in the middle, and the elastic component passes through the through hole and is installed on the base plate. By setting a pressure plate at one end of the central shaft and making the pressure plate abut against the trigger end of the buffer component, the displacement movement of the central shaft can be directly transmitted to the buffer component, effectively improving the sensitivity and transmission efficiency of the buffer response. When the door body moves and causes the central shaft to displace, the pressure plate is simultaneously subjected to force and pushes the trigger end of the buffer component, instantly activating the buffering effect and achieving a fast and reliable damping effect.

[0008] According to some embodiments of this utility model, the rotating unit further includes a positioning block, the interior of which forms mounting cavities for the central shaft, the rotating shaft, the elastic element, and the buffer element. The positioning block not only effectively constrains the relative positions of the components, improving assembly accuracy and structural stability, but also provides good protection for the internal components, preventing external dust and foreign objects from intruding and affecting normal operation.

[0009] According to some embodiments of this utility model, the pressure plate is movably installed at the open end of the mounting cavity. This movable installation method enables a dynamic fit between the pressure plate, the central shaft, the elastic element, and the buffer element. When the door moves and causes the central shaft to shift, the pressure plate can respond promptly and transmit the movement trend, effectively playing a buffering role.

[0010] According to some embodiments of this utility model, the end face of the positioning block is provided with a plurality of threaded holes, and the positioning block is fixed to the base plate by a threaded connector; the end face of the base plate is provided with a countersunk connecting hole, and after the threaded connector is installed, the end face of the base plate remains flush. The threaded holes ensure the installation stability and structural rigidity between the rotating unit and the base plate, effectively transmitting and bearing various stresses during the movement of the door. At the same time, the countersunk connecting hole on the end face of the base plate allows the head of the threaded connector to be completely embedded in the countersunk hole after installation, without protruding from the surface of the base plate, thereby maintaining the flatness of the end face of the base plate.

[0011] According to some embodiments of this utility model, a mounting hole is provided on the inner side of the central shaft, and the elastic element is embedded in the mounting hole, with one end abutting against the inner wall of the mounting hole and the other end abutting against the base plate. This achieves axial positioning and compact integration of the elastic element. This structure effectively utilizes the internal space of the central shaft, allowing the elastic element to be partially enclosed within the central shaft, preventing the elastic element from skewing, bending, or lateral deformation during operation, improving the coaxiality and stability of the force, and ensuring the uniform transmission of the elastic restoring force.

[0012] According to some embodiments of this utility model, the rotating shaft is provided with a stepped portion, which is located in the middle of the rotating shaft and abuts against the other end of the central shaft. The abutment between the stepped portion on the rotating shaft and the other end of the central shaft not only achieves axial positioning but also provides clear resistance feedback during door opening, resulting in a good operating feel. When the door is opened, the rotating unit is forced to displace the central shaft, compressing the elastic element. The abutment structure between the stepped portion and the end face of the central shaft generates a stable supporting torque at a specific angle, enabling the door to automatically remain in that position after opening to a certain angle, thus realizing the "door opening and stopping" function.

[0013] According to some embodiments of this utility model, two buffer components are provided, symmetrically arranged on both sides of the central axis. By providing two buffer components symmetrically arranged on both sides of the central axis, a balanced buffering effect on the movement trend of the central axis can be achieved, effectively avoiding uneven loading, tilting, or jamming caused by uneven force distribution.

[0014] According to some embodiments of this utility model, multiple buffer members are provided, and the multiple buffer members are arranged circumferentially along the central axis. Arranging multiple buffer members circumferentially along the central axis can provide uniform and coordinated buffering resistance from multiple directions when the central axis experiences displacement or rotation, thereby effectively suppressing omnidirectional displacement.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of a buffer-type door hinge according to an embodiment of the present utility model; Figure 2 This is an internal schematic diagram of a buffer-type door hinge according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the rotating unit according to an embodiment of the present utility model; Figure 4This is one of the schematic diagrams of the positioning block in an embodiment of the present utility model; Figure 5 This is a second schematic diagram of the positioning block in an embodiment of the present utility model.

[0017] Reference numerals: base plate 100; threaded connector 110; positioning block 120; rotating shaft 130; stepped part 140; central shaft 150; buffer 160; pressure plate 170; elastic element 180; mounting cavity 190. Detailed Implementation

[0018] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] Reference Figures 1 to 5 A buffer-type door hinge includes: a base plate 100, which is fixedly installed on the mounting base; The rotating unit includes a central shaft 150, a rotating shaft 130, an elastic element 180, and a buffer element 160. One end of the central shaft 150 is mounted to the base plate 100 via the elastic element 180, and the rotating shaft 130 is rotatably mounted to the other end of the central shaft 150. The buffer element 160 is disposed on one side of the central shaft 150 and is used to reduce the movement tendency of the central shaft 150.

[0023] This buffer-type door hinge connects one end of the central shaft 150 to the base plate 100 via an elastic element 180, and a buffer element 160 is installed on one side of the central shaft 150, forming a structural system that combines elastic support and buffer damping. When the door is subjected to external forces, such as wind or manual pushing and pulling, and rotates rapidly, the pivot 130 and the central shaft 150 tend to displace. At this time, the elastic element 180 is compressed or extended, providing a return force, while the buffer element 160 effectively suppresses the movement tendency of the central shaft 150, significantly slowing down the overall dynamic response speed of the hinge. This structure not only achieves bidirectional buffering during the opening and closing of the door, effectively reducing impact force and vibration noise, and improving user comfort and safety, but also ensures the flexibility of normal rotation through the separate design of the central shaft 150 and the pivot 130. At the same time, the buffering function is integrated into the rotating unit, resulting in a compact structure, sensitive response, and stable operation, improving the overall durability and reliability of the hinge.

[0024] The elastic element 180 is a compression spring, and the buffer element 160 is a hydraulic damper. Using the hydraulic damper as the buffer element 160, the damping characteristics of the internal hydraulic oil are utilized to generate a smooth and continuous resistance to the movement trend of the central axis 150, achieving precise buffer control. It can effectively absorb the kinetic energy generated when the door opens or closes quickly, and significantly reduce noise and vibration.

[0025] When the door opens or closes, external force causes the central axis 150 of the hinge to tend to displace. This displacement is transmitted through the structure to the compression spring and the hydraulic damper: the compression spring is compressed and deformed under the push of the central axis 150, storing elastic potential energy and providing a continuous restoring force; simultaneously, the movement of the central axis 150 triggers the piston rod of the hydraulic damper through the pressure plate 170 or directly, pushing the internal hydraulic oil to flow through the throttle orifice. The viscous resistance of the hydraulic oil consumes the kinetic energy of the movement, forming a continuous and controllable damping force, thereby effectively slowing down the movement speed of the central axis 150. When the external force disappears, the compression spring releases energy, driving the central axis 150 back to its original position, achieving a smooth door reset, while the hydraulic damper continues to play a damping role during this process, preventing excessive rebound or impact.

[0026] The use of a compression spring as the elastic element 180 offers advantages such as stable elasticity, high load-bearing capacity, and long fatigue life, providing reliable reset power for the hinge and ensuring automatic door return. The hydraulic damper utilizes the principle of liquid damping to achieve a smooth, stepless buffering effect, responding sensitively to the movement speed of the central axis 150. It effectively absorbs impact energy, especially during rapid opening and closing, significantly reducing noise and vibration.

[0027] The rotating unit also includes a pressure plate 170, which is located at one end of the central shaft 150 and abuts against the trigger end of the buffer 160. A through hole is provided in the center of the pressure plate 170, through which an elastic element 180 passes and is mounted on the base plate 100. By setting the pressure plate 170 at one end of the central shaft 150 and abutting against the trigger end of the buffer 160, the displacement of the central shaft 150 can be directly transmitted to the buffer 160, effectively improving the sensitivity and transmission efficiency of the buffer response. When the door movement causes the central shaft 150 to displace, the pressure plate 170 is simultaneously subjected to force and pushes the trigger end of the buffer 160, instantly activating the buffering effect and achieving a fast and reliable damping effect.

[0028] When the door movement causes the hinge's central shaft 150 to undergo axial displacement, the pressure plate 170 installed at one end of the central shaft 150 moves synchronously. The movement of the pressure plate 170 directly acts on the trigger end (such as the piston rod end) of the hydraulic damper it abuts against, pushing the buffer 160 to activate, causing the internal hydraulic oil to flow and generate damping force, thereby suppressing the movement tendency of the central shaft 150 and achieving a buffering effect. Simultaneously, the displacement of the central shaft 150 causes the pressure plate 170 to compress or release the compression spring passing through its through hole. The compression spring absorbs energy through elastic deformation and provides a return force. Throughout the process, the pressure plate 170 acts as a force transmission medium, simultaneously transmitting the movement of the central shaft 150 to both the buffer 160 and the elastic element 180, coordinating their collaborative work.

[0029] By setting the pressure plate 170 to directly abut against the trigger end of the buffer 160, efficient and immediate transmission of motion from the central shaft 150 to the buffer 160 is achieved, improving the sensitivity and reliability of the buffer response. The through hole in the middle of the pressure plate 170 allows the elastic element 180 to pass through and connect to the base plate 100, ensuring both the axial positioning and stable force distribution of the elastic element 180, and achieving an integrated linkage structure between the elastic element 180 and the pressure plate 170, avoiding loosening or eccentricity issues caused by independent installation. This design coordinates the elastic reset and damping buffer functions along the same motion path, resulting in a compact structure, direct force transmission, and smooth operation. Simultaneously, the pressure plate 170 enhances the structural strength of the end of the central shaft 150, preventing the elastic element 180 from dislodging, and facilitating assembly and maintenance, thereby improving the overall reliability, durability, and production consistency of the hinge.

[0030] The rotating unit also includes a positioning block 120, the interior of which forms a mounting cavity 190 for the central shaft 150, rotating shaft 130, elastic element 180, and buffer element 160. The positioning block 120 not only effectively constrains the relative positions of the components, improving assembly accuracy and structural stability, but also provides good protection for the internal components, preventing external dust and foreign objects from intruding and affecting normal operation.

[0031] During the operation of the door hinge, the central shaft 150 tends to move axially under the influence of the door. One end of the central shaft 150 is connected to the base plate 100 via an elastic element 180, and the other end is equipped with a rotatable pivot 130 to enable the door to rotate. Simultaneously, the buffer element 160 dampens the movement of the central shaft 150. The mounting cavity 190 formed inside the positioning block 120 integrates the central shaft 150, pivot 130, elastic element 180, and buffer element 160 into a closed space. When the door opens or closes, the central shaft 150 moves axially within the cavity, compressing the elastic element 180 and triggering the buffer element 160, achieving a synergistic effect of elastic reset and buffer deceleration. The pivot 130 rotates stably at the other end of the central shaft 150, ensuring normal door rotation. The entire movement process proceeds orderly within the cavity of the positioning block 120, with each component operating in coordination within its preset space.

[0032] The pressure plate 170 is movably installed at the open end of the mounting cavity 190. This movable installation method allows the pressure plate 170 to form a dynamic fit with the central shaft 150, the elastic element 180, and the buffer element 160. When the door moves and causes the central shaft 150 to move, the pressure plate 170 can respond in time and transmit the movement trend, effectively playing a buffering role.

[0033] When the door opens or closes, the central shaft 150 undergoes axial displacement under the action of force, causing the pressure plate 170 at its end to slide axially within the opening of the mounting cavity 190. During the movement, the pressure plate 170 compresses or releases the elastic element 180 (such as a compression spring) passing through it, realizing the storage and release of energy; on the other hand, its front end continuously abuts against and pushes the trigger end of the buffer element 160 (such as the piston rod of a hydraulic buffer), activating the buffering mechanism and slowing down the movement speed of the central shaft 150 through damping force.

[0034] The pressure plate 170 is movably mounted on the open end of the mounting cavity 190, allowing it to slide freely axially while maintaining good guidance. This ensures that the pressure plate 170 does not deflect or jam during movement, improving the accuracy of force transmission and response sensitivity. This structure achieves a stable fit between the pressure plate 170 and the cavity, guaranteeing the normal working stroke of the elastic element 180 and the buffer element 160, while avoiding stress concentration or structural damage caused by rigid connections.

[0035] The positioning block 120 has several threaded holes on its end face, and is fixed to the base plate 100 by a threaded connector 110. The base plate 100 has countersunk connecting holes on its end face, ensuring that the end face of the base plate 100 remains flush after the threaded connector 110 is installed. The threaded holes ensure the installation stability and structural rigidity between the rotating unit and the base plate 100, effectively transmitting and bearing various stresses during the door's movement. Simultaneously, the countersunk connecting holes on the end face of the base plate 100 allow the head of the threaded connector 110 to be fully embedded in the countersunk hole after installation, without protruding from the surface of the base plate 100, thus maintaining the flatness of the end face of the base plate 100.

[0036] During door hinge installation, the positioning block 120 is aligned with the base plate 100 through several threaded holes on its end face and fastened using threaded connectors 110 (such as screws). The threaded connectors 110 pass sequentially through countersunk connecting holes on the base plate 100 and are screwed into the threaded holes of the positioning block 120. As the threaded connectors 110 are tightened, the positioning block 120 is firmly pressed onto the base plate 100, ensuring the rotating unit is stably fixed to the base plate 100. When the door generates dynamic loads during opening or closing, these forces are transmitted to the positioning block 120 through components such as the central shaft 150 and pressure plate 170, and then evenly transmitted to the base plate 100 via the threaded connectors 110, ultimately guiding the force to the mounting base, achieving effective force transmission and load bearing. Due to the countersunk connecting hole design, the head of the threaded connector 110 is fully embedded in the hole, and its top does not protrude from the end face of the base plate 100 after installation, ensuring the entire mounting surface of the base plate 100 remains flat and smooth.

[0037] The threaded hole on the end face of the positioning block 120 mates with the countersunk connection hole on the base plate 100, achieving a high-strength, high-precision connection between the rotating unit and the base plate 100. This significantly improves the stability and rigidity of the overall structure, effectively withstanding vibration, impact, and torsional loads generated during frequent opening and closing of the door. The countersunk connection hole design ensures that the threaded connector 110 is flush with the end face of the base plate 100 after installation, avoiding installation interference, scratches, or dust accumulation caused by protruding connectors, thus improving installation compatibility and aesthetic neatness. Simultaneously, the flat end face of the base plate 100 allows for a complete fit with the mounting substrate (such as a door frame or cabinet), enhancing contact stability and preventing stress concentration or loosening due to localized warping, further improving installation reliability and long-term durability.

[0038] A mounting hole is provided on the inner side of the central shaft 150, and the elastic element 180 is embedded in the mounting hole, with one end abutting against the inner wall of the mounting hole and the other end abutting against the base plate 100. This achieves axial positioning and compact integration of the elastic element 180. This structure effectively utilizes the internal space of the central shaft 150, so that the elastic element 180 is partially wrapped inside the central shaft 150, avoiding skewness, bending or lateral deformation of the elastic element 180 during operation, improving the coaxiality and stability of the force, and ensuring the uniform transmission of the elastic restoring force.

[0039] When the door opens or closes, external force causes the hinge's central axis 150 to tend to displace axially. Since the central axis 150 has a mounting hole on its inner side, an elastic element 180 (such as a compression spring) is embedded in this hole, with one end abutting against the inner wall of the mounting hole and the other end abutting against the base plate 100. When the central axis 150 moves under force, the elastic element 180 is compressed or released between the mounting hole and the base plate 100, producing corresponding elastic deformation, storing or releasing energy, thereby providing a stable restoring force. This force causes the central axis 150 to automatically return to its original position after the door movement ends, achieving smooth closing or opening and resetting of the door. Throughout the process, the elastic element 180 is always confined within the axial space formed by the mounting hole and the base plate 100, and is subjected to force along the direction of the central axis 150, ensuring the linearity and consistency of the elastic action.

[0040] The elastic element 180 is embedded within the mounting hole of the central shaft 150, with its two ends directly abutting against the inner wall of the mounting hole and the base plate 100, respectively. This achieves precise axial positioning and compact integration of the elastic element 180, effectively utilizing the internal space of the central shaft 150 and avoiding structural looseness or external interference caused by external placement of the elastic element 180. This design ensures that the elastic element 180 remains coaxially stressed during operation, preventing skewness, bending, or lateral instability, and significantly improving the uniformity of force distribution and the smoothness of movement.

[0041] The pivot 130 is provided with a stepped portion 140, which is located in the middle of the pivot 130. The stepped portion 140 abuts against the other end of the central shaft 150. This not only achieves axial positioning but also provides clear resistance feedback during door opening, resulting in a good operating feel. When the door is opened, the rotating unit is forced to displace the central shaft 150, compressing the elastic element 180. The abutment structure between the stepped portion 140 and the end face of the central shaft 150 generates a stable supporting torque at a specific angle, allowing the door to automatically remain in that position after opening to a certain angle, thus achieving the "door-opening and stopping" function.

[0042] When the door opens or closes via hinges, the pivot 130, acting as a rotating component connecting the door, rotates around the end of the central shaft 150. A stepped portion 140 located in the middle of the pivot 130 abuts against the other end face of the central shaft 150. During door rotation, the stepped portion 140 remains in contact with the end face of the central shaft 150. This abutment structure axially limits the pivot 130, preventing it from shifting or disengaging axially during rotation. When the door is subjected to external impact or rapid opening / closing, the contact surface between the stepped portion 140 and the end face of the central shaft 150 bears the axial load and transmits it to the central shaft 150 and the base plate 100 structure, ensuring stable force transmission. Simultaneously, when the door is opened to a certain angle, this mating structure, in conjunction with the rebound force of the elastic element 180, forms a stable supporting torque, allowing the door to remain in that position after opening, achieving the "door-opening stop" function.

[0043] Two buffer components 160 are provided and symmetrically arranged on both sides of the central axis 150. By providing two buffer components 160 and symmetrically arranging them on both sides of the central axis 150, the movement trend of the central axis 150 can be balanced and buffered, effectively avoiding uneven loading, tilting or jamming caused by uneven force.

[0044] Two buffer components 160 are symmetrically arranged on both sides of the central axis 150. When the central axis 150 is subjected to force and moves, its movement directly or synchronously triggers the buffer components 160 on both sides through the pressure plate 170. The buffer components 160 on both sides respond simultaneously, generating damping forces respectively, applying opposing resistance of the same direction and magnitude to the central axis 150, forming a balanced buffering effect. This symmetrical force ensures that the central axis 150 maintains force balance during movement, preventing deflection or tilting, and ensuring the smooth operation of the rotating unit. Whether the door opens inward or outward, the buffer components 160 on both sides can work together to effectively absorb kinetic energy, reduce impact speed, and achieve bidirectional smooth buffering.

[0045] Multiple buffer elements 160 are provided, and the multiple buffer elements 160 are arranged circumferentially along the central axis 150. By arranging multiple buffer elements 160 circumferentially along the central axis 150, uniform and coordinated buffering resistance can be provided from multiple directions when the central axis 150 has a tendency to shift or rotate, so as to effectively suppress omnidirectional displacement.

[0046] Multiple buffer elements 160 are evenly spaced around the central axis 150. When the central axis 150 is subjected to force and moves or vibrates, its movement tendency triggers the buffer elements 160 at corresponding positions from multiple directions. Each buffer element 160 responds synchronously or sequentially according to the direction of the force, generating reverse resistance through its internal damping structure (such as hydraulic or elastic damping), which together act on the central axis 150 to form an all-round, continuous buffer force field.

[0047] This embodiment discloses a buffer-type door hinge, suitable for cabinet doors, room doors, bathroom doors, and other applications requiring smooth opening and closing and buffering functions. The hinge features a compact overall structure, stable operation, and excellent elastic reset and bidirectional buffering performance.

[0048] The buffer-type door hinge includes a base plate 100 and a rotating unit. The base plate 100 is made of metal sheet and is used for fixed installation on a mounting base such as a door frame or wall. Its end face is provided with countersunk connection holes to ensure a flat surface after installation and avoid interference.

[0049] The rotating unit, mounted on the base plate 100, is the core component for realizing the door's rotation and buffering functions. The rotating unit includes a central shaft 150, a rotating shaft 130, a compression spring, a hydraulic buffer, a pressure plate 170, and a positioning block 120.

[0050] The central shaft 150 is a columnar structure with an axial mounting hole on its inner side. A compression spring, as an elastic element 180, is embedded in the mounting hole, with one end abutting against the inner wall of the mounting hole and the other end abutting against the base plate 100, thereby achieving axial positioning and pre-tensioning of the compression spring and providing a stable restoring force for the central shaft 150.

[0051] A pivot 130 is rotatably mounted at the other end of a central shaft 150 for connecting to the door body. A stepped portion 140 is provided in the middle of the pivot 130, which abuts against the end face of the central shaft 150, providing axial restraint to the pivot 130 and preventing axial movement during rotation. Simultaneously, the abutment between the stepped portion 140 and the central shaft 150 provides stable support when the door is opened to a certain angle. Combined with the spring force of the compression spring, this allows the door to automatically stop after opening, providing a good opening feel and maintaining the open position.

[0052] Two hydraulic dampers, serving as buffer components 160, are symmetrically arranged on both sides of the central axis 150. In other embodiments, multiple hydraulic dampers may be provided and evenly spaced along the circumference of the central axis 150 to achieve omnidirectional buffering. The trigger end of the damper faces the central axis 150 and is used to receive the movement tendency of the central axis 150 and generate damping force.

[0053] The pressure plate 170 is located at one end of the central shaft 150, outside the mounting hole. A through hole is provided in the center of the pressure plate 170, through which one end of the compression spring passes and abuts against the base plate 100. The outer circumferential surface of the pressure plate 170 abuts against the trigger end of the buffer 160. When the door moves, causing axial displacement of the central shaft 150, the pressure plate 170 moves accordingly, directly pushing the piston rod of the hydraulic buffer and activating the buffering function. The pressure plate 170 is movably mounted on the opening end of the mounting cavity 190 of the positioning block 120, allowing it to slide axially within the cavity to ensure smooth movement and sensitive response.

[0054] The positioning block 120 is a metal shell structure, forming a closed mounting cavity 190 inside, in which the central shaft 150, rotating shaft 130, compression spring, and hydraulic damper are all integrated and installed. The end face of the positioning block 120 has several threaded holes, which are used to fix it to the base plate 100 via threaded connectors 110 (such as screws). The countersunk connecting holes on the base plate 100 mate with the threaded connectors 110, ensuring that the screw heads do not protrude from the surface of the base plate 100 after installation, maintaining an overall flat surface.

[0055] In this embodiment, when the door is rapidly opened or closed by external force, the central shaft 150 undergoes axial displacement under the force, compressing or releasing the compression spring. Simultaneously, the pressure plate 170 pushes the hydraulic dampers on both sides (or multiple sides), utilizing the damping effect of hydraulic oil to dissipate kinetic energy and achieve smooth buffering. When closing, the compression spring releases energy, driving the door to slowly return to its original position, avoiding impact. The entire process operates smoothly and quietly, effectively improving the user experience and safety.

[0056] This structure improves assembly precision and reliability through modular integrated design, while also possessing good protection, durability and ease of maintenance, making it suitable for various door installation scenarios.

[0057] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A buffer-type door hinge, characterized in that, include: The base plate is fixedly installed on the mounting base. The rotating unit includes a central shaft, a rotating shaft, an elastic element, and a buffer element. One end of the central shaft is mounted to the base plate via the elastic element, the rotating shaft is rotatably mounted to the other end of the central shaft, and the buffer element is disposed on one side of the central shaft to reduce the movement tendency of the central shaft.

2. A buffer-type door hinge according to claim 1, characterized in that, The elastic element is a compression spring, and the buffer element is a hydraulic damper.

3. A buffer-type door hinge according to claim 1 or 2, characterized in that, The rotating unit also includes a pressure plate, which is located at one end of the central shaft and abuts against the trigger end of the buffer; the pressure plate has a through hole in the middle, and the elastic element passes through the through hole and is installed on the base plate.

4. A buffer-type door hinge according to claim 3, characterized in that, The rotating unit also includes a positioning block, the interior of which forms a mounting cavity for the central shaft, the rotating shaft, the elastic element, and the buffer element.

5. A buffer-type door hinge according to claim 4, characterized in that, The tablet is movably mounted at the open end of the mounting cavity.

6. A buffer-type door hinge according to claim 4, characterized in that, The end face of the positioning block is provided with several threaded holes, and the positioning block is fixed to the base plate by a threaded connector; the end face of the base plate is provided with a countersunk connection hole, and after the threaded connector is installed, the end face of the base plate remains flush.

7. A buffer-type door hinge according to claim 1, characterized in that, The inner side of the central shaft is provided with a mounting hole, the elastic element is embedded in the mounting hole, one end of which abuts against the inner wall of the mounting hole, and the other end abuts against the base plate.

8. A buffer-type door hinge according to claim 1, characterized in that, The rotating shaft is provided with a stepped portion, which is located in the middle of the rotating shaft and abuts against the other end of the central shaft.

9. A buffer-type door hinge according to claim 1, characterized in that, Two buffer components are provided, and they are symmetrically arranged on both sides of the central axis.

10. A buffer-type door hinge according to claim 1, characterized in that, Multiple buffer elements are provided, and the multiple buffer elements are arranged circumferentially along the central axis.

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