A down-tilt door buffer hinge structure

Abstract

The application relates to the technical field of door plate hinges, in particular to a downward-turning door buffer hinge structure, a first cover body, a sliding slot being arranged in the middle of the first cover body; an air spring being installed in the sliding slot and capable of swinging along the sliding slot; a force arm being arranged on one side of the first cover body, a door plate being fixed on the force arm; a connecting rod assembly, one end of the connecting rod assembly being hingedly connected with an output end of the air spring, the other end being assembled with the force arm, the connecting rod assembly being used for driving the force arm and the door plate to turn over; a buffer assembly, the buffer assembly comprising a buffer push rod and a buffer body, the buffer push rod being rotatably installed above the inside of the first cover body, the buffer body being installed on one side of the inside of the first cover body, the buffer push rod being assembled with the buffer body, the bottom end of the buffer push rod being abutted with the connecting rod assembly. The downward-turning door buffer hinge structure can make the hinge mechanism simple and has good buffering capacity.

Description

Technical Field

[0001] This application relates to the technical field of door hinges, and in particular to a soft-close hinge structure for a flip-down door. Background Technology

[0002] Downward-opening door hinges are mostly used for the installation and connection between cabinet bodies and door panels. They generally include a linkage assembly and a power mechanism that enables the linkage to retract and expand. The hinge structure disclosed in the prior art is assembled with a tension spring and a linkage. The original power of the hinge structure is provided by the tension spring, and the magnitude of the force depends on the extension and contraction length of the tension spring. The direction of the force and the opening and closing of the door panel are achieved by the direction of the linkage connected to the lever arm. This mechanism can realize the automatic opening and closing of the door panel, but it is relatively difficult to realize the slow opening or slow closing of the door panel. It can only be achieved by using the tension of the tension spring to slow down the opening and closing speed of the door panel and realize the slow closing.

[0003] In practical applications, current flip-down door hinges require a large stroke drive through the cooperation of connecting rods and tension springs, which in turn forms a large frame foundation. As a result, the flip-down door hinge structure has redundant and cumbersome space, making the overall structure complex and space-consuming, and the performance is not good. Summary of the Invention

[0004] To address the technical deficiencies in the aforementioned background technology, this application provides a downward-opening door buffer hinge structure, which simplifies the hinge mechanism while providing excellent buffering capability.

[0005] This application provides a soft-close hinge structure for a tilt-down door, which adopts the following technical solution:

[0006] A hinge structure for a flip-down door includes a first cover, wherein a sliding groove is provided in the middle of the first cover;

[0007] A gas spring, which is installed in the sliding groove and can swing along the sliding groove;

[0008] A lever arm is provided on one side of the first cover, and the door panel is fixed to the lever arm;

[0009] A linkage assembly, one end of which is hinged to the output end of the gas spring and the other end is assembled to the lever arm, the linkage assembly being used to drive the lever arm and the door panel to rotate;

[0010] A buffer assembly includes a buffer push rod and a buffer body. The buffer push rod is rotatably mounted inside the upper part of the first cover, and the buffer body is mounted inside the first cover on one side. The buffer push rod is assembled with the buffer body, and the bottom end of the buffer push rod abuts against the connecting rod assembly.

[0011] By adopting the above technical solutions, the combined use of the lever arm and linkage assembly enables the door panel to perform different functions of flipping and opening smoothly. By introducing gas springs and buffer components, a smooth buffering effect can be provided during the flipping process of the door panel, effectively avoiding the impact and noise caused by excessive force during the opening and closing process of the door panel, thereby improving the safety and comfort of use.

[0012] Compared with the prior art, this application uses the dual cooperation of gas spring and buffer spring. The buffer component can compensate for the insufficient buffering capacity caused by the position difference in the cooperation process between the linkage component and the gas spring. This allows the door to achieve effective buffering during both opening and closing. The entire hinge structure can achieve effective buffering and effective opening and closing of the door panel in a more compact space. Moreover, the overall implementation principle is simple, easy to implement, and has strong practicality and significant effect, meeting the actual use needs.

[0013] Preferably, the first cover is provided with a first partition, the first partition includes a first corner blocking area and a second corner blocking area, and a clearance space for the extension movement of the gas spring is formed between the first corner blocking area and the second corner blocking area. The first corner blocking area has an inclined surface on the side near the gas spring, and the height of the inclined surface is greater than the diameter of the gas spring.

[0014] By adopting the above technical solution, the height of the inclined plane is larger than the diameter of the gas spring, which is sufficient to protect the gas spring and prevent the gas spring from swinging too much to a certain extent, thus avoiding derailment. The setting of the first and second stop angle zones helps to enhance the safety of the structure and thus helps to improve the working efficiency and stability of the hinge structure.

[0015] Preferably, the first cover is provided with a second partition, which is distributed opposite to the first partition with an installation space between them. The connecting rod assembly, the buffer assembly, and the gas spring are all disposed in the installation space. The sliding groove is fan-shaped and is opened between the second partition and the first partition. The connecting rod assembly is arranged below the gas spring, and the buffer assembly is arranged on the side close to the second partition.

[0016] By adopting the above technical solution, the second partition and the first partition are distributed opposite each other, and the installation space formed between them provides a compact and orderly environment for the linkage assembly, the buffer assembly and the gas spring. This application ensures that the linkage assembly can be smoothly linked by calculating the minimum space occupied by the movement stroke of the linkage assembly. The gas spring can also provide a buffering effect. At the same time, the buffer assembly is used to compensate for the insufficient buffering capacity caused by the position difference in the cooperation process between the linkage assembly and the gas spring. The downward hinge structure of this application reduces redundant space, has a simple overall structure, occupies little installation space, and has a simple operating principle, thus improving the user experience.

[0017] Preferably, the buffer push rod includes a mounting part, a buffer abutment part, and a pushing part arranged sequentially from top to bottom. The buffer abutment part has a U-shaped structure, with one end of the buffer body assembled inside the second partition and the other end abutting against the recess of the buffer abutment part.

[0018] By adopting the above technical solution, the cooperation between the U-shaped buffer abutment and the buffer body effectively increases the buffer contact area, thereby improving the stability and reliability of the buffering effect.

[0019] Preferably, the second partition includes a limiting buckle, and a mounting shaft is rotatably connected to the mounting part of the buffer push rod. The buffer push rod is rotatably connected to the first cover body through the mounting shaft. The limiting buckle is disposed above the mounting part and is used to limit the maximum stroke of the buffer push rod.

[0020] By adopting the above technical solution, the maximum stroke of the buffer push rod can be precisely limited under the action of the limit buckle, ensuring that the buffer push rod will not exceed the predetermined range during the movement, effectively reducing the damage or failure of the buffer push rod, and enabling the buffer push rod to cooperate effectively with the connecting rod assembly.

[0021] Preferably, the linkage assembly includes a main linkage, a secondary linkage, a first swing arm, a second swing arm, and a connecting rod. The first and second swing arms are arranged in parallel, and the bottom ends of the first and second swing arms are assembled to the first cover via shaft connections. The top ends of the first and second swing arms are assembled to the main linkage via shaft connections. One end of the secondary linkage is assembled to the output end of the gas spring, and the other end passes through the middle of the first and second swing arms and is assembled to the connecting rod. The other end of the connecting rod is assembled to the lever arm and the main linkage via a connecting shaft.

[0022] By adopting the above technical solution, the combined design of the main connecting rod, secondary connecting rod, first swing rod, second swing rod, and connecting rod forms a stable support structure, which helps to improve the overall stability of the hinge structure, enhances its load-bearing capacity, and makes the door panel more stable and reliable during the flipping process. The specific connection method of each connecting rod in this application optimizes the force transmission path, allowing the force generated by the gas spring to be evenly distributed to each connecting rod, avoiding damage caused by excessive local stress. The connecting rods can coordinate and move synchronously, improving the movement efficiency and smoothness of the door panel opening and closing process.

[0023] Preferably, the middle of the pushing part has a through groove, through which the main connecting rod passes. The side of the pushing part near the gas spring is the inner surface, and the opposite side of the inner surface is the outer surface. When the door panel is opened, the top end of the first swing rod presses against the inner surface; when the door panel is closed, the top end of the second swing rod presses against the outer surface.

[0024] By adopting the above technical solution, firstly, the slot on the push part provides guidance for the main connecting rod, thereby providing a precise passing path and ensuring the stability and accuracy of the main connecting rod during movement. Secondly, the staggered assembly between the slot on the push part and the main connecting rod improves the compactness of the structure and saves assembly space. Thirdly, when the door panel is opened, the top of the first swing arm presses against the inner surface of the push part; when the door panel is closed, the top of the second swing arm presses against the outer surface of the push part. This design provides effective buffer support at different stages of door panel rotation, thereby reducing impact and wear, effectively preventing sudden closing or opening of the door panel during rotation, and helping to extend the service life of the structure.

[0025] Preferably, the top end of the second spacer is provided with a groove, and the top end of the gas spring is provided with a mating shaft. The top end of the gas spring is disposed in the groove, and the mating shaft passes through both the wall of the second spacer near the groove and the top end of the gas spring, so that the gas spring and the mating shaft are rotatably connected.

[0026] By adopting the above technical solution, a groove is opened at the top of the second spacer and rotated to connect with the mating shaft at the top of the gas spring. This helps to enhance the connection stability and flexibility between the gas spring and the second spacer. The groove design provides a space for the top of the gas spring, making the overall structure more compact and reducing friction and wear generated by the gas spring during rotation to a certain extent.

[0027] Preferably, the first partition and the second partition are each provided with an adjustment component, which is used to adjust the position of the first partition or the second partition.

[0028] By adopting the above technical solution and setting the adjustment component, users can accurately adjust the position of the first or second partition as needed, thereby meeting the usage requirements in different installation environments and improving the applicability and flexibility of the structure.

[0029] Preferably, the buffer body is a buffer cylinder or a buffer oil cylinder with active buffering capability.

[0030] By adopting the above technical solutions, the buffer body uses a buffer cylinder or buffer oil cylinder with active buffering capability, which significantly improves the controllability and stability of the buffering effect, so that the door panel can be subjected to a more uniform and stable buffering force during the flipping process; in addition, the active buffering capability provided by the buffer body reduces the damage of impact and vibration to the hinge structure, effectively extending the service life of the structure.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. In this application, the second partition and the first partition are distributed opposite each other, and the installation space formed between them provides a compact and orderly environment for the linkage assembly, the buffer assembly and the gas spring. This application ensures that the linkage assembly can be smoothly linked by calculating the minimum space occupied by the linkage assembly's movement stroke. The gas spring and the buffer assembly can provide a buffering effect to ensure that the opening and closing process of the door panel is smooth and safe.

[0033] 1. In this application, when the door panel is opened, the top end of the first swing arm presses against the inner surface of the push part; when the door panel is closed, the top end of the second swing arm presses against the outer surface of the push part. Through the simple pressing design, effective cushioning support can be obtained at different stages of the door panel flipping.

[0034] 2. In this application, the buffer body adopts a buffer cylinder or buffer oil cylinder with active buffering capability, which significantly improves the controllability and stability of the buffering effect, so that the door panel can be subjected to a more uniform and stable buffering force during the flipping process. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the door being open in an embodiment of this application.

[0036] Figure 2 This is a schematic diagram of the door's closed state in an embodiment of this application.

[0037] Figure 3 yes Figure 2 A sectional view.

[0038] Figure 4 This is a schematic diagram of the motion state of the gas spring in an embodiment of this application.

[0039] Figure 5This is a schematic diagram of the cooperation of the first cover, connecting rod assembly and buffer assembly in the embodiments of this application.

[0040] Figure 6 This is a schematic diagram of the linkage assembly in an embodiment of this application.

[0041] Figure 7 This is a schematic diagram of the cooperation between the buffer assembly and the connecting rod assembly in an embodiment of this application.

[0042] Figure 8 This is a schematic diagram of the cooperation between the first cover and the second cover in an embodiment of this application.

[0043] Explanation of reference numerals in the attached drawings: 1. First cover; 11. Base plate; 12. First mating plate; 13. Second mating plate; 14. Sliding groove; 2. Second cover; 3. Gas spring; 4. Lever arm; 5. Linkage assembly; 51. Main link; 52. Secondary link; 53. First swing arm; 54. Second swing arm; 55. Connecting rod; 6. Buffer assembly; 61. Buffer push rod; 611. Mounting part; 612. Buffer abutment part; 613. Pushing part; 6131. ​​Through groove; 6132. Inner surface; 6133. Outer surface; 62. Buffer body; 7. First partition; 71. First corner blocking area; 72. Second corner blocking area; 73. Clearance space; 74. Inclined surface; 8. Second partition; 81. Limit buckle; 82. Groove; 9. Adjustment assembly; 10. Door body. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0045] This application discloses a soft-close hinge structure for a flip-down door.

[0046] Reference Figure 1-3 A hinge structure for a flip-down door includes a first cover 1, a gas spring 3, a lever arm 4, a connecting rod assembly 5, and a buffer assembly 6. The first cover 1 has a sliding groove 14. The gas spring 3 is installed in the sliding groove 14 of the first cover 1 and can swing. The lever arm 4 is set on one side of the first cover 1 to fix the door panel. One end of the connecting rod assembly 5 is connected to the output end of the gas spring 3, and the other end is connected to the lever arm 4 to drive the door panel to flip.

[0047] This application replaces the traditional tension spring with a gas spring 3, achieving a buffering effect by controlling the gas speed, resulting in better shock absorption and noise reduction, and higher motion stability. The minimum space occupied by the linkage assembly 5 during its movement is calculated to ensure smooth linkage. Both the buffer assembly 6 and the gas spring 3 provide buffering, offering dual protection. Specifically, the buffer assembly 6 compensates for insufficient buffering capacity caused by the positional difference during the interaction between the linkage assembly 5 and the gas spring 3, ensuring effective buffering during both opening and closing of the door 10. This allows the entire hinge structure to achieve effective buffering within a more compact space, ensuring smooth and safe opening and closing of the door panel. The hinge structure of this application does not require a large-stroke drive or a large frame foundation. Through the cooperation of the buffer assembly 6, the gas spring 3, and the linkage assembly 5, a buffering effect is achieved, simplifying the hinge structure of the flip-down door, reducing space occupation, and enabling the door panel to open and close slowly.

[0048] Reference Figure 3 and Figure 5 This application does not limit the specific shape and structure of the first cover 1, but requires that the first cover 1 provide the installation foundation for the entire structure. The first cover 1 shown in the attached drawings includes a base plate 11, a first mating plate 12 and a second mating plate 13. The base plate 11 has reinforcing ribs on its side to enhance the structural strength. The first mating plate 12 and the second mating plate 13 are stacked on the base plate 11 in sequence. Both have a sliding groove 14 through them at the same position. The front view of the sliding groove 14 is fan-shaped to accommodate the swing trajectory of the gas spring 3. There is a storage space between the first mating plate 12 and the second mating plate 13, in which the connecting rod assembly 5, the buffer assembly 6 and other components are stored.

[0049] The first cover 1 is provided with a first partition 7 and a second partition 8, which are distributed opposite each other. The first partition 7 and the second partition 8 are both integrally formed structures. The area where they face each other has an installation space. The connecting rod assembly 5, the buffer assembly 6, and the gas spring 3 are all installed in the installation space. Specifically, the first partition 7 includes a first corner stop area 71 and a second corner stop area 72. The first corner stop area 71 provides protection for the upper corner on one side, and the second corner stop area 72 provides protection for the lower corner on one side. A clearance space 73 is formed between the first corner stop area 71 and the second corner stop area 72 to allow the gas spring 3 to extend. An inclined surface 74 is provided on the side of the first corner stop area 71 near the gas spring 3. The height of the inclined surface 74 is greater than the diameter of the gas spring 3. The inclined surface 74 can protect the gas spring 3, prevent the gas spring 3 from swinging too much, and avoid derailment.

[0050] Reference Figure 4 and Figure 5The second spacer 8 has a groove 82 on the side near the top of the first spacer 7, which runs through from top to bottom. In this application, the gas spring 3 includes components such as a cylinder, piston rod, piston, and sealing guide sleeve. The cylinder of the gas spring 3 is installed in the sliding groove 14 and can swing along the sliding groove 14. The sealing guide sleeve and piston are located inside the cylinder. The sealing guide sleeve provides guidance for the movement of the piston. One end of the piston rod is assembled with the piston, and the other end extends out of the cylinder. The entire cylinder has good sealing performance, and the cylinder contains a certain amount of air. When the piston of the gas spring 3 compresses air towards the bottom of the cylinder, it stores energy; conversely, it releases energy and converts it into buffer force, which can provide support, buffering, braking, height adjustment, and angle adjustment. To achieve the installation of the gas spring 3, in this application, a mating shaft is provided at the top of the gas spring 3. The top of the gas spring 3 is located in the groove 82. The mating shaft passes through both the wall of the second spacer 8 near the groove 82 and the top of the gas spring 3, so that the gas spring 3 is rotatably connected to the mating shaft.

[0051] Reference Figure 3 and Figure 6 One end of the linkage assembly 5 is hinged to the piston rod output end of the gas spring 3, and the other end is assembled with the lever arm 4. The linkage assembly 5 is used to drive the lever arm 4 and the door panel to flip. Specifically, the linkage assembly 5 includes a main linkage 51, a secondary linkage 52, a first swing arm 53, a second swing arm 54, and a connecting rod 55. The first swing rod 53 and the second swing rod 54 are arranged vertically in parallel, and the main connecting rod 51 and the auxiliary connecting rod 52 are arranged horizontally in parallel. The bottom ends of the first swing rod 53 and the second swing rod 54 are assembled to the first cover 1 by means of shaft connection, and the top ends of the first swing rod 53 and the second swing rod 54 are assembled to the main connecting rod 51 by means of shaft connection. Furthermore, the first swing rod 53 and the second swing rod 54 are both double-layer rod structures with through slots in the middle of the double-layer rod structure, so that one end of the auxiliary connecting rod 52 is assembled to the output end of the gas spring 3, and the other end passes through the through slots of the first swing rod 53 and the second swing rod 54 and is assembled to the connecting rod 55. The other end of the connecting rod 55 is assembled to the lever arm 4 and the main connecting rod 51 by means of connecting shaft.

[0052] Furthermore, these connecting rods are generally made of steel or carbon fiber, possessing high strength and rigidity. The connecting rod assembly 5 uses a shaft connection, allowing for flexible rotation between the connecting rods, thereby enabling the transmission and conversion of force. (Refer to...) Figure 3 and Figure 6In the attached drawings, points D are where the corresponding structures are locked to the first cover 1 by rivets, and points E are where adjacent structures are locked together by shafts rather than connected to the first cover 1. Therefore, the rods intersecting at point E have higher degrees of freedom of movement, enabling corresponding rotation. In this application, the parts of the first swing rod 53, the second swing rod 54, the main connecting rod 51, and the secondary connecting rod 52 that cooperate with each other form a parallelogram structure, which has good structural stability and achieves the effect of driving the arm 4 to rotate the door panel 90 degrees, thus achieving the purpose of automatic opening and closing of the door panel. Furthermore, the end structure of the secondary connecting rod 52 can be adaptively designed according to the swing angle of the first swing rod 53, achieving an avoidance effect with a small change in shape and avoiding interference.

[0053] Reference Figure 1 and Figure 2 The length of the linkage assembly 5 in this application corresponds to an optimal buffer angle of 30 degrees, that is, buffering automatically starts when the door is opened to 60 degrees; or, buffering automatically starts when the door is closed to 60 degrees, so as to avoid the door panel opening and closing effect being poor due to sudden and excessive force.

[0054] Reference Figure 4 and Figure 7 The buffer assembly 6 includes a buffer push rod 61 and a buffer body 62. A storage groove is provided on the side of the second partition 8 near the bottom end of the gas spring 3. The second partition 8 is horizontally installed in the storage groove. The buffer body 62 is a buffer cylinder or buffer oil cylinder with active buffering capability, providing stable buffering force. The buffer push rod 61 is rotatably installed inside the upper part of the first cover 1. The buffer push rod 61 includes a mounting part 611, a buffer abutment part 612, and a pushing part 613 arranged sequentially from top to bottom. The buffer abutment part 612 has a U-shaped structure. One end of the buffer body 62 is fitted inside the second partition 8, and the other end abuts against the recess of the buffer abutment part 612. A mounting shaft is rotatably connected to the mounting part 611 of the buffer push rod 61, and the buffer push rod 61 is rotatably connected to the first cover 1 through the mounting shaft. The second partition 8 includes a limiting buckle 81, which is located above the mounting part 611 and is used to limit the maximum stroke of the buffer push rod 61. Furthermore, the middle of the pushing part 613 of the buffer push rod 61 is provided with a through groove 6131, through which the main connecting rod 51 passes. The side of the pushing part 613 near the gas spring 3 is the inner surface 6132, and the opposite side of the inner surface 6132 is the outer surface 6133. When the door panel is opened, the top end of the first swing rod 53 presses against the inner surface 6132; when the door panel is closed, the top end of the second swing rod 54 presses against the outer surface 6133.

[0055] In practical applications, under the action of the limit buckle 81, the maximum stroke of the buffer push rod 61 can be precisely limited, ensuring that the buffer push rod 61 will not exceed the predetermined range during the movement, effectively reducing the possibility of damage or failure of the buffer push rod 61, and enabling the buffer push rod 61 to cooperate effectively with the connecting rod assembly 5.

[0056] In another preferred embodiment, the buffer 62 is an electromagnetic buffer. The electromagnetic buffer includes components such as an electromagnetic coil, an iron core, and an armature. When the linkage assembly 5 pushes the buffer push rod 61, the buffer push rod 61 moves the armature. The electromagnetic coil is energized to generate a magnetic field, which creates resistance on the armature, thereby achieving a buffering effect. The electromagnetic buffer can precisely control the buffering force by adjusting the current, allowing for more precise control of the buffering force. This makes the opening and closing of the door panel smoother and more stable, improving the effect of the door panel's slow opening and closing, and adapting to different usage scenarios.

[0057] Reference Figure 4 and Figure 7 When the door panel is opened, the piston rod of the gas spring 3 is pushed by the force of the connecting rod assembly 5, causing the piston to move inside the cylinder. The movement trajectory of the piston rod is from point A through point B to point C. Point B is the equilibrium point, where the air compression effect is at its maximum. At this point, the gas spring 3 does not provide any cushioning. Point C is the maximum stroke point of the connecting rod assembly 5. At this point, the gas spring 3 can provide a small amount of cushioning, but it cannot fully provide the cushioning force for opening the door panel. The movement of the first swing rod 53 pushes the buffer push rod 61, and the buffer body 62 provides the cushioning force to compensate for the cushioning force required when opening the door panel, ensuring the best effect of opening the door panel. Conversely, when the door panel is closed, the piston rod of the gas spring 3 is pushed by the connecting rod assembly 5, causing the piston to move within the cylinder. The piston rod's trajectory is from point C through point B to point A. During this process, the piston rod is extended primarily by the piston of the gas spring 3, and the gas spring 3 releases energy to provide cushioning when the door panel closes. Simultaneously, the movement of the second rocker arm 54 pushes the buffer push rod 61, and the buffer push rod 61 and buffer body 62 reset. Alternatively, the buffer push rod 61 and buffer body 62 can also be designed to provide cushioning force for this process.

[0058] In this application, the combined use of lever arm 4 and linkage assembly 5 enables the door panel to perform different functions of flipping and opening smoothly and stably. By introducing gas spring 3 and buffer assembly 6, a smooth buffering effect can be provided during the flipping process of the door panel, effectively avoiding the impact and noise caused by excessive force during the opening and closing process of the door panel, thereby improving the safety and comfort of use.

[0059] Compared with the prior art, this application, through the dual cooperation of gas spring 3 and buffer spring, the buffer component 6 can compensate for the insufficient buffering capacity caused by the positional difference in the cooperation process between the linkage component 5 and gas spring 3, so that the door 10 can achieve effective buffering in both opening and closing processes. This allows the entire hinge structure to achieve effective buffering and effective opening and closing of the door panel in a more compact space. Moreover, the overall implementation principle is simple, easy to implement, and has strong practicality and significant effect, meeting the actual use needs.

[0060] Reference Figure 3 and Figure 4 The first partition 7 and the second partition 8 are each equipped with an adjustment component 9, which is used to adjust the position of the first partition 7 or the second partition 8. The adjustment component 9 can be a bolt and nut structure, in which the position of the first partition 7 or the second partition 8 is adjusted by rotating the bolt to ensure the fitting accuracy between the components. Specifically, adjustment holes are provided through the first partition 7 and the second partition 8. The direction of the adjustment holes is consistent with the height direction of the first cover 1, and the extension direction of the adjustment holes is consistent with the length direction of the first cover 1. Screws are installed in the adjustment holes, and the position of the first partition 7 or the second partition 8 can be finely adjusted by adjusting the tightness of the screws, ensuring the fitting accuracy of the components and improving the stability and reliability of the entire hinge structure.

[0061] The hinge structure of this application also includes a second cover 2, which covers the side of the second mating plate 13 away from the base plate 11. The base plate 11, the first mating plate 12, the second mating plate 13 and the second cover 2 are connected and fixed by bolts to ensure the stability of the overall structure and provide a supporting foundation and protection for parts such as the connecting rod assembly 5, the buffer assembly 6 and the gas spring 3.

[0062] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A soft-close hinge structure for a flip-down door, characterized in that, include: The first cover (1) has a sliding groove (14) in the middle. A gas spring (3) is installed in the sliding groove (14) and can swing along the sliding groove (14); A lever arm (4) is provided on one side of the first cover (1), and the door panel is fixed on the lever arm (4); Linkage assembly (5), one end of which is hinged to the output end of the gas spring (3) and the other end is assembled with the lever arm (4). The linkage assembly (5) is used to drive the lever arm (4) and the door panel to flip. A buffer assembly (6) includes a buffer push rod (61) and a buffer body (62). The buffer push rod (61) is rotatably mounted on the inside of the first cover (1), and the buffer body (62) is mounted on the inside side of the first cover (1). The buffer push rod (61) is assembled with the buffer body (62), and the bottom end of the buffer push rod (61) abuts against the connecting rod assembly (5). The first cover (1) is provided with a first partition (7), the first partition (7) includes a first corner blocking area (71) and a second corner blocking area (72), and a clearance space (73) for the extension movement of the gas spring (3) is formed between the first corner blocking area (71) and the second corner blocking area (72). The first corner blocking area (71) has an inclined surface (74) on the side close to the gas spring (3), and the height of the inclined surface (74) is greater than the diameter of the gas spring (3). The first cover (1) is provided with a second partition (8), the second partition (8) and the first partition (7) are distributed opposite each other, and there is an installation space between them. The connecting rod assembly (5), the buffer assembly (6) and the gas spring (3) are all arranged in the installation space. The sliding groove (14) is fan-shaped between the second partition (8) and the first partition (7). The connecting rod assembly (5) is arranged below the gas spring (3), and the buffer assembly (6) is arranged on the side close to the second partition (8). The buffer push rod (61) includes a mounting part (611), a buffer abutment part (612) and a pushing part (613) arranged sequentially from top to bottom. The buffer abutment part (612) has a U-shaped structure. One end of the buffer body (62) is assembled in the second partition (8) and the other end abuts against the recess of the buffer abutment part (612). The second partition (8) includes a limiting buckle (81). The mounting part (611) of the buffer push rod (61) is rotatably connected to a mounting shaft. The buffer push rod (61) is rotatably connected to the first cover (1) through the mounting shaft. The limiting buckle (81) is located above the mounting part (611). The limiting buckle (81) is used to limit the maximum stroke of the buffer push rod (61).

2. The downward-opening door buffer hinge structure according to claim 1, characterized in that, The linkage assembly (5) includes a main linkage (51), a secondary linkage (52), a first swing rod (53), a second swing rod (54), and a connecting rod (55). The first swing rod (53) and the second swing rod (54) are arranged in parallel. The bottom ends of the first swing rod (53) and the second swing rod (54) are connected to the first cover (1) by a shaft. The top ends of the first swing rod (53) and the second swing rod (54) are connected to the main linkage (51) by a shaft. One end of the secondary linkage (52) is connected to the output end of the gas spring (3), and the other end passes through the middle of the first swing rod (53) and the second swing rod (54) and is connected to the connecting rod (55). The other end of the connecting rod (55) is connected to the lever arm (4) and the main linkage (51) by a connecting shaft.

3. The downward-opening door buffer hinge structure according to claim 2, characterized in that, The push part (613) has a through groove (6131) in the middle, and the main connecting rod (51) passes through the through groove (6131). The side of the push part (613) near the gas spring (3) is the inner surface (6132), and the opposite side of the inner surface (6132) is the outer surface (6133). When the door panel is opened, the top end of the first swing rod (53) presses against the inner surface (6132); when the door panel is closed, the top end of the second swing rod (54) presses against the outer surface (6133).

4. The downward-opening door buffer hinge structure according to claim 1, characterized in that, The second partition (8) has a groove (82) at its top end, and the gas spring (3) has a mating shaft at its top end. The top end of the gas spring (3) is located in the groove (82). The mating shaft passes through the wall of the second partition (8) near the groove (82) and the top end of the gas spring (3), so that the gas spring (3) and the mating shaft are rotatably connected.

5. A downward-opening door buffer hinge structure according to claim 1, characterized in that, The first partition (7) and the second partition (8) are respectively provided with adjustment components (9), which are used to adjust the position of the first partition (7) or the second partition (8).

6. A downward-opening door buffer hinge structure according to any one of claims 1-5, characterized in that, The buffer body (62) is a buffer cylinder or buffer oil cylinder with active buffering capability.

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