Adjustable hovering buffer hinge assembly

Abstract

The utility model discloses an adjustable hovering buffering hinge assembly. The upper hinge is rotatably mounted at the upper end of the lower hinge; the upper spring seat is arranged at the lower end of the upper hinge and can rotate relative to the upper hinge; the lower spring seat is mounted in the middle or at the lower end of the lower hinge; the spring is arranged between the lower spring seat and the upper spring seat; a linear damper used for buffering is further connected between the lower spring seat and the upper spring seat. A plurality of gear shaft holes distributed in the length direction of the lower hinge are formed in the outer side of the lower hinge, and a gear adjusting shaft penetrates through the gear shaft holes and is arranged in a transverse shaft hole of the lower spring seat in a penetrating mode, so that the lower spring seat is installed in the lower hinge in the mode that the relative position can be adjusted. And the distance between the lower spring seat and the upper spring seat can be adjusted by penetrating the gear adjusting shaft into the gear shaft holes at different positions, so that the pre-compression amount of the spring and the linear damper is adjusted, and the multi-angle hovering function of the multi-angle hovering mechanism is realized.

Description

Technical fields:

[0001] This utility model relates to the technical field of hinge products, and specifically to an adjustable hovering buffer hinge assembly. Background technology:

[0002] Most horizontal refrigerator hinges on the market lack damping, requiring the user to hold the door during descent; otherwise, the door will slam shut quickly, causing a loud slam and damage, and potentially pinching the hand. Furthermore, while some horizontal refrigerator hinges offer damping for easier descent, these typically lack multi-angle stopping capabilities. This means that to stop the refrigerator door from opening, the user must either hold it or open it to its maximum angle, which is time-consuming, laborious, and inconvenient for one-handed operation.

[0003] To address the aforementioned issues, a assisted hinge, a horizontal freezer, and a working method have been proposed (application number 202210880969.7). This assisted hinge includes a hinge head, a connecting rod, a support rod, a support base, a hinge seat, and a spring. The connecting rod connects the hinge head and the support rod at both ends. When the hinge head flips, the rotating end of the connecting rod is limited by the connecting shaft on the hinge head, restricting the lid's flipping ability. When the horizontal freezer is closed, the spring is compressed and, due to the magnetic attraction, cannot push the hinge head and lid. When the lid moves, it causes the hinge head to flip upwards. The hinge head, through the first connecting shaft, drives the connecting rod to flip upwards as well. The connecting rod then drives the support rod upwards. At this point, the spring begins to extend, preventing the support seat from moving downwards, causing the spring to extend upwards. The spring washer also causes the support rod to move upwards, providing opening assistance and facilitating the opening of larger lids. When taking items out of or storing items in the horizontal freezer, the spring's assistance allows the lid to remain suspended.

[0004] However, the aforementioned assisted hinges have no cushioning effect and the hovering angle is usually not adjustable, making them inconvenient to use. Furthermore, the aforementioned assisted hinges cannot adjust the drop time of the lid or the minimum hovering angle, thus failing to improve the user experience.

[0005] In view of the above, the inventors propose the following technical solution. Utility model content:

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adjustable hovering buffer hinge assembly.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The adjustable hovering buffer hinge assembly includes a lower hinge, an upper hinge rotatably mounted on the upper end of the lower hinge, an upper spring seat located at the lower end of the upper hinge and rotatable relative to the upper hinge, a lower spring seat mounted in the middle or lower end of the lower hinge, and a spring disposed between the lower spring seat and the upper spring seat. A linear damper for buffering is also connected between the lower spring seat and the upper spring seat. The lower hinge has multiple gear shaft holes distributed along its length on its outer side. A gear adjustment shaft passes through the gear shaft holes and is installed in the transverse shaft hole of the lower spring seat, so that the lower spring seat is installed in the lower hinge in an adjustable relative position. The distance between the lower spring seat and the upper spring seat can be adjusted by the gear adjustment shaft passing through the gear shaft holes at different positions, thereby adjusting the pre-compression of the spring and the linear damper.

[0008] Furthermore, in the above technical solution, a guide rod is fixed to the lower end of the upper spring seat; the lower spring seat is sleeved on the outside of the guide rod and can slide relative to the guide rod to adjust the distance between it and the upper spring seat.

[0009] Furthermore, in the above technical solution, the spring is sleeved outside the linear damper.

[0010] Furthermore, in the above technical solution, the spring is sleeved on the outside of the guide rod.

[0011] Furthermore, in the above technical solution, the guide rod is provided with a first threaded section and a second threaded section at its upper and lower ends, respectively; the lower end of the upper spring seat is provided with a threaded hole, the upper end of the guide rod is screwed into the threaded hole of the upper spring seat through the first threaded section, the lower end of the guide rod passes through the guide hole of the lower spring seat and extends out of the lower end of the lower spring seat, and two first nuts are screwed onto the second threaded section.

[0012] Furthermore, in the above technical solution, the lower end of the upper spring seat is provided with a first recess, the upper end of the linear damper is embedded in the first groove at the bottom of the first recess, and the upper end of the spring is embedded in the second groove at the opening of the first recess. The lower outer side of the upper spring seat is also provided with several first positioning holes penetrating the second groove, and the upper end of the spring is exposed in the first positioning holes. The upper end of the lower spring seat is provided with a second recess, the lower end of the linear damper is embedded in the third groove at the bottom of the second recess, and the lower end of the spring is embedded in the fourth groove at the opening of the second recess. The upper outer side of the lower spring seat is also provided with several second positioning holes penetrating the fourth groove, and the lower end of the spring is exposed in the second positioning holes.

[0013] Furthermore, in the above technical solution, the lower end of the upper spring seat is provided with a first threaded groove, and the first external thread on the outer periphery of the upper end of the linear damper is helically installed with the first threaded groove to be fixedly assembled with the upper spring seat; the upper end of the lower spring seat is provided with a second threaded groove, and the second external thread on the outer periphery of the lower end of the linear damper is helically installed with the second threaded groove to be fixedly assembled with the lower spring seat.

[0014] Furthermore, in the above technical solution, the upper end of the lower hinge is rotatably connected to the upper hinge via a rotating shaft, and both sides of the upper end of the lower hinge are provided with arc holes. The sliding shaft passes through the arc holes and connects with the first shaft hole at the lower end of the upper hinge and the second shaft hole of the upper spring seat, so that the upper hinge and the upper spring seat are rotatably connected. After the upper hinge rotates relative to the lower hinge, the sliding shaft slides along the arc holes and pulls the upper spring seat to rotate.

[0015] Furthermore, in the above technical solution, both sides of the upper end of the lower hinge have upwardly extending first pivot plates, and a first clearance opening is formed between the two first pivot plates for the lower end of the upper hinge and the upper spring seat to rotate; both sides of the lower end of the upper hinge have downwardly extending second pivot plates that are rotatably assembled with the first pivot plates.

[0016] Furthermore, in the above technical solution, the lower hinge is provided with a number of hoist mounting holes in the middle, and the lower end of the lower hinge is provided with a number of positioning holes that extend downward and penetrate the lower end face of the lower hinge; the upper hinge is provided with a number of second mounting holes in the middle.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0018] 1. This utility model adds a linear damper, which provides damping force to the upper hinge during the rotation of the lower hinge. That is, the linear damper provides damping force during the closing of the refrigerator door and its descent relative to the refrigerator body, enabling the refrigerator door to descend slowly and achieve a buffering effect, preventing hand injuries caused by sudden closure due to its own weight. In addition, important components such as the linear damper, spring, guide rod, and lower spring seat are all installed within the lower hinge enclosure, making the structure of this utility model more compact and further reducing space requirements, which is beneficial for applications in structures with high space requirements.

[0019] 2. The multi-angle hovering function of this invention can be achieved by adjusting the viscosity of the damping oil in the linear damper and adjusting the compression of the spring. In actual use, the distance between the lower spring seat and the upper spring seat can be adjusted by pushing the lower spring seat relative to the guide rod according to the actual usage requirements. Then, the gear adjustment shaft is passed through the gear shaft hole of the lower hinge and inserted into the transverse shaft hole of the lower spring seat, so that the lower spring seat is rotatably fixed in the lower spring seat. The distance between the lower spring seat and the upper spring seat is adjusted to adjust the pre-compression of the spring and the linear damper, thereby realizing the adjustability of the refrigerator door's falling time and minimum hovering angle to meet different usage requirements.

[0020] 3. When the refrigerator door is closed, the spring is in a compressed state. When the refrigerator door is opened, the spring is released, generating a thrust. The direction of the force is opposite to the direction of the gravity on the refrigerator door, thus achieving the function of easy opening. Attached image description:

[0021] Figure 1 This is a perspective view of Embodiment 1 of this utility model;

[0022] Figure 2 This is a perspective view of another embodiment of the present utility model;

[0023] Figure 3 This is an exploded view of Embodiment 1 of this utility model;

[0024] Figure 4 This is a perspective view of the lower spring seat in Embodiment 1 of this utility model.

[0025] Figure 5 This is a perspective view of Embodiment 2 of this utility model;

[0026] Figure 6 This is an exploded perspective view of Embodiment 2 of this utility model;

[0027] Figure 7 This is a perspective view of the lower spring seat in Embodiment 2 of this utility model;

[0028] Figure 8 This is a perspective view of Embodiment 3 of this utility model. Detailed implementation method:

[0029] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0030] Example 1:

[0031] like Figure 1-4 As shown, an adjustable hovering buffer hinge assembly includes a lower hinge 1, an upper hinge 2, an upper spring seat 3, a lower spring seat 4, a spring 5, a linear damper 6, and a guide rod 7.

[0032] This invention can be used on refrigerators, and also on other products with flip-top / door opening and closing mechanisms (such as printers, dishwashers, etc.).

[0033] The upper hinge 2 is rotatably mounted on the upper end of the lower hinge 1. The upper spring seat 3 is located at the lower end of the upper hinge 2 and can rotate relative to the upper hinge 2. The lower spring seat 4 is mounted in the middle or at the lower end of the lower hinge 1. The spring 5 is located between the lower spring seat 4 and the upper spring seat 3. The linear damper 6 is connected between the lower spring seat 4 and the upper spring seat 3, and the spring 5 is sleeved on the outside of the linear damper 6. A guide rod 7 is also fixed to the lower end of the upper spring seat 3. The lower spring seat 4 is sleeved on the outside of the guide rod 7 and can guide the lower spring seat 1. The distance between the lever 7 and the upper spring seat 3 is adjusted by sliding. The lower hinge 1 has multiple gear shaft holes 11 distributed along its length on its outer side. A gear adjustment shaft 12 passes through the gear shaft hole 11 and is installed in the transverse shaft hole 41 of the lower spring seat 4, so that the lower spring seat 4 is installed in the lower hinge 1 in an adjustable relative position. The distance between the lower spring seat 4 and the upper spring seat 3 can be adjusted by the gear adjustment shaft 12 passing through the gear shaft holes 11 at different positions, thereby adjusting the pre-compression of the spring 5 and the linear damper 6.

[0034] In practical use, the lower hinge 1 is fixed to the refrigerator body, while the upper hinge 2 is fixed to the refrigerator door, making the refrigerator door hinged to the refrigerator body. This invention adds a linear damper 6, which provides damping force during the rotation of the upper hinge 2 relative to the lower hinge 1. Specifically, the linear damper 6 provides damping force during the closing of the refrigerator door and its descent relative to the refrigerator body, allowing the refrigerator door to descend slowly, achieving a buffering effect and preventing hand injuries from sudden closure due to its own weight. Furthermore, important components such as the linear damper 6, spring 5, guide rod 7, and lower spring seat 4 are all housed within the lower hinge enclosure, making the structure of this invention more compact and further reducing space requirements, which is beneficial for applications in structures with high space constraints. The multi-angle hovering function of this invention can be achieved by adjusting the viscosity of the damping oil in the linear damper and adjusting the compression of the spring. In practical use, the distance between the lower spring seat 4 and the upper spring seat 3 can be adjusted by sliding the lower spring seat 4 relative to the guide rod 7, according to actual usage requirements. The guide rod 7 provides guidance, making the movement of the lower spring seat 4 smoother. Then, the gear adjustment shaft 12 is passed through the gear shaft hole 11 of the lower hinge 1 and through the transverse shaft hole 41 of the lower spring seat 4, so that the lower spring seat 4 is rotatably fixed in the lower spring seat 3. The distance between the lower spring seat 4 and the upper spring seat 3 can be adjusted to adjust the pre-compression of the spring 5 and the linear damper 6, thereby achieving adjustability of the refrigerator door's falling time and minimum hovering angle to meet different usage requirements. At the same time, when the refrigerator door is closed, the spring 5 is in a compressed state. When the refrigerator door is opened, the compression of the spring 5 is released, generating a thrust. The direction of the force is opposite to the direction of the gravity on the refrigerator door, achieving the function of easy opening.

[0035] The following is a detailed description of the installation structure of guide rod 7:

[0036] The guide rod 7 has a first threaded section 71 and a second threaded section 72 at its upper and lower ends, respectively. Except for the first threaded section 71 and the second threaded section 72 at its upper and lower ends, the other parts of the guide rod 7 are smooth rods, which facilitates the sliding of the lower spring seat 4 relative to the guide rod 7 to adjust the relative position.

[0037] The upper spring seat 3 has a threaded hole 31 at its lower end. The upper end of the guide rod 7 is screwed into the threaded hole 31 of the upper spring seat 3 through a first threaded section 71. The assembly structure is simple, the installation is firm, and the installation efficiency is extremely high. The lower end of the guide rod 7 passes through the guide hole 42 of the lower spring seat 4 and extends out of the lower end of the lower spring seat 4. Two first nuts 73 are screwed onto the second threaded section 72, which can effectively prevent the guide rod 7 from coming out of the guide hole 42 of the lower spring seat 4, ensuring the stability of the assembly structure. The two first nuts 73 are screwed onto the second threaded section 72, which can interlock and make the first nuts stably installed on the second threaded section 72.

[0038] The gear adjustment shaft 12 has a first convex cap 121 at one end and a first slot 122 at the other end. A first retaining spring 123 is fitted in the first slot 122. The first convex cap abuts against one side of the lower hinge 1, and the first retaining spring 123 abuts against the other side of the lower hinge 1. Its assembly structure is extremely simple.

[0039] The assembly structure of the lower hinge 1 and the upper hinge 2 is as follows:

[0040] The upper end of the lower hinge 1 is rotatably connected to the upper hinge 2 via a rotating shaft 13. One end of the rotating shaft 13 is provided with a second convex cap 131, and the other end is provided with a second slot 132. A second retaining spring 133 is fitted in the second slot 132. The second convex cap abuts against one side of the lower hinge 1, and the second retaining spring 133 abuts against the other side of the lower hinge 1. Its assembly structure is extremely simple.

[0041] Both sides of the upper end of the lower hinge 1 are provided with arc holes 14. The sliding shaft 15 passes through the arc holes 14 and is connected to the first shaft hole 21 at the lower end of the upper hinge 2 and the second shaft hole 32 of the upper spring seat 3, so that the upper hinge 2 and the upper spring seat 3 are rotatably connected. After the upper hinge 2 rotates relative to the lower hinge 1, the sliding shaft 15 slides along the arc holes 14 and pulls the upper spring seat 3 to rotate, making the rotation of the upper hinge 2 relative to the lower hinge 1 more stable, and limiting the angle of rotation of the upper hinge 2 relative to the lower hinge 1 to avoid excessive rotation.

[0042] The sliding shaft 15 has a third convex cap 151 at one end and a third slot 152 at the other end. A third retaining spring 153 is fitted into the third slot 152. A gasket 154 is also fitted onto the other end of the sliding shaft 15. The third retaining spring 153 abuts against the outer side of the gasket 154, the third convex cap abuts against one side of the lower hinge 1, and the inner side of the gasket 154 abuts against the other side of the lower hinge 1. This effectively prevents the sliding shaft 15 from coming off, and the assembly structure is extremely simple.

[0043] The assembly structure of the linear damper 6, spring 5, upper spring seat 3, and lower spring seat 4 is as follows:

[0044] The upper spring seat 3 has a first recess 33 at its lower end. The upper end of the linear damper 6 is embedded in the first groove 331 at the bottom of the first recess 33. The upper end of the spring 5 is embedded in the second groove 332 at the opening of the first recess 33. The lower outer side of the upper spring seat 3 also has several first positioning holes 34 penetrating the second groove 332, with the upper end of the spring 5 exposed in the first positioning holes 34. The assembly structure is stable and easy to install. The lower spring seat 4 has a second recess 43 at its upper end. The lower end of the linear damper 6 is embedded in the third groove 431 at the bottom of the second recess 43. The lower end of the spring 5 is embedded in the fourth groove 432 at the opening of the second recess 43. The upper outer side of the lower spring seat 4 also has several second positioning holes 433 penetrating the fourth groove 432, with the lower end of the spring 5 exposed in the second positioning holes 433. The assembly structure is stable and easy to install.

[0045] Both sides of the upper end of the lower hinge 1 have upwardly extending first pivot plates 16, and a first clearance opening 160 is formed between the two first pivot plates 16 for the lower end of the upper hinge 2 and the upper spring seat 3 to rotate. The design of the first clearance opening 160 ensures that the lower end of the upper hinge 2 and the upper spring seat 3 will not collide with the lower hinge 1 when rotating, thus ensuring the stability and smoothness of rotation. Both sides of the lower end of the upper hinge 2 have downwardly extending second pivot plates 22 that are rotatably assembled with the first pivot plates 16, which facilitates installation.

[0046] The lower hinge 1 has several hoist mounting holes 17 in the middle for installation. Screws pass through the hoist mounting holes 17 and are fixedly installed to the refrigerator body. The lower end of the lower hinge 1 has several positioning holes 18, which are embedded and positioned with the positioning part on the refrigerator body, so that the lower hinge is stably installed on the refrigerator body. The positioning holes 18 extend downward and penetrate the lower end face of the lower hinge 1. The upper hinge 2 has multiple second mounting holes 23 in the middle. Screws pass through the second mounting holes 23 and are fixedly connected to the refrigerator door. Its assembly structure is simple and stable.

[0047] In practical use, this utility model incorporates a linear damper 6. During the closing and falling process of the refrigerator door, the upper hinge 2 rotates around the rotating shaft 13, causing the upper spring seat 3 and sliding shaft 15 to move within the arc hole 14 of the lower hinge 1. The upper spring seat 3 and lower spring seat 4 slide relative to each other along the guide rod 7, compressing the linear damper 6 and generating damping force, causing the refrigerator door to fall slowly, reducing impact and creating a comfortable closing effect. The spring 5 is fitted over the linear damper 6, and during the closing process, the spring 5 is also compressed along with the linear damper 6. When the reaction force generated by compression balances the weight of the refrigerator door, the refrigerator door can maintain a constant opening and closing angle, achieving a hovering function. The lower hinge 1 has a row of evenly distributed position shaft holes 11 at its lower end. The position adjustment shaft 12, in conjunction with different position shaft holes 11, adjusts the pre-compression of the spring 5 and the linear damper 6, thereby adjusting the falling time and minimum hovering angle of the refrigerator door. At the same time, when the refrigerator door is closed, the spring 5 is in a compressed state. When the refrigerator door is opened, the compression of the spring 5 is released, generating a thrust. The direction of the force is opposite to the direction of the weight of the refrigerator door, achieving the function of easy opening.

[0048] In summary, this invention adds a linear damper 6, which provides damping force to the upper hinge 2 during its rotation relative to the lower hinge 1. Specifically, the linear damper 6 provides damping force as the refrigerator door closes and falls relative to the refrigerator body, allowing the door to descend slowly and providing a buffering effect to prevent hand injuries from sudden closure due to its own weight. Furthermore, important components such as the linear damper 6, spring 5, guide rod 7, and lower spring seat 4 are all housed within the lower hinge enclosure, making the structure more compact and further reducing space requirements, which is beneficial for applications in structures with high space constraints. The multi-angle hovering function of this invention can be achieved by adjusting the viscosity of the damping oil in the linear damper and adjusting the compression of the spring. In practical use, the distance between the lower spring seat 4 and the upper spring seat 3 can be adjusted by sliding the lower spring seat 4 relative to the guide rod 7 according to actual usage requirements. Then, the gear adjustment shaft 12 is passed through the gear shaft hole 11 of the lower hinge 1 and inserted into the transverse shaft hole 41 of the lower spring seat 4, so that the lower spring seat 4 is rotatably fixed in the lower spring seat 3. The distance between the lower spring seat 4 and the upper spring seat 3 is adjusted to adjust the pre-compression of the spring 5 and the linear damper 6, thereby achieving the adjustability of the refrigerator door's falling time and minimum hovering angle to meet different usage requirements. At the same time, when the refrigerator door is closed, the spring 5 is in a compressed state. When the refrigerator door is opened, the compression of the spring 5 is released, generating a thrust. The direction of the force is opposite to the direction of the gravity acting on the refrigerator door, achieving the function of easy opening of the lid.

[0049] Example 2:

[0050] The difference between this second embodiment and the first embodiment described above is that: [the following is a combination of...] Figure 6 and Figure 7 As shown, in this embodiment, the two guide rods 7 are eliminated, and the threaded hole 31 of the upper spring seat 3 and the guide hole 42 of the lower spring seat 4 are also eliminated; both ends of the linear damper 6 are designed with external threads, and both the upper spring seat 3 and the lower spring seat 4 are provided with threaded grooves that are adapted to the external threads. Specifically, the lower end of the upper spring seat 3 is provided with a first threaded groove 301, and the first external thread 61 on the outer periphery of the upper end of the linear damper 6 is screwed onto the first threaded groove 301 to fix it to the upper spring seat 3; the upper end of the lower spring seat 4 is provided with a second threaded groove 401, and the second external thread 62 on the outer periphery of the lower end of the linear damper 6 is screwed onto the second threaded groove 401 to fix it to the lower spring seat 4. During installation, the upper spring seat 3 and the lower spring seat 4 are connected by the linear damper 6, allowing only axial movement between them. This effectively replaces the guiding function of the original guide rod 7. Since there are no guide rods 7 installed on either side of the upper spring seat 3 and the lower spring seat 4, the width of the lower hinge 1 can be reduced, improving the space utilization of the adjustable hovering buffer hinge assembly. In terms of assembly, the assembly process is further reduced, improving efficiency. Eliminating the two guide rods 7 reduces the number of parts in the adjustable hovering buffer hinge assembly, further reducing the overall cost of the adjustable hovering buffer hinge assembly.

[0051] Apart from the above, the other structures of this embodiment two are the same as those of the other structures of embodiment one, and can achieve the same technical effects as embodiment one, which will not be described in detail here.

[0052] Example 3:

[0053] The difference between this embodiment three and the above embodiment one is that: [combination] Figure 8 As shown, in this embodiment three, the single spring 5 that was sleeved on the linear damper 7 is replaced with two springs 5 ​​that are sleeved on the guide rods 7. That is, this embodiment three uses two springs 5, and the two springs are respectively sleeved on the two guide rods 7 in a one-to-one correspondence. The symmetrical distribution of the two springs 5 ​​on both sides can ensure that the force on the adjustable hovering buffer hinge assembly is more balanced, and the total spring stiffness of the combination of the two springs 5 ​​has a larger adjustable range, so that the adjustable hovering buffer hinge assembly can be used for a wider range of refrigerator door weights.

[0054] Apart from the above, the other structures of this embodiment three are the same as those of the other structures of embodiment one, and can achieve the same technical effects as embodiment one, which will not be described in detail here.

[0055] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An adjustable hovering buffer hinge assembly, comprising a lower hinge (1), an upper hinge (2) rotatably mounted on the upper end of the lower hinge (1), an upper spring seat (3) disposed on the lower end of the upper hinge (2) and rotatable relative to the upper hinge (2), a lower spring seat (4) mounted on the middle or lower end of the lower hinge (1), and a spring (5) disposed between the lower spring seat (4) and the upper spring seat (3), characterized in that: A linear damper (6) for buffering is also connected between the lower spring seat (4) and the upper spring seat (3). The lower hinge (1) has multiple gear shaft holes (11) distributed along its length on its outer side. A gear adjustment shaft (12) passes through the gear shaft hole (11) and is installed in the transverse shaft hole (41) of the lower spring seat (4), so that the lower spring seat (4) is installed in the lower hinge (1) in an adjustable relative position. The distance between the lower spring seat (4) and the upper spring seat (3) can be adjusted by the gear adjustment shaft (12) being installed through the gear shaft holes (11) at different positions, thereby adjusting the pre-compression of the spring (5) and the linear damper (6).

2. The adjustable hovering buffer hinge assembly according to claim 1, characterized in that: The lower end of the upper spring seat (3) is also fixed with a guide rod (7); the lower spring seat (4) is sleeved on the outside of the guide rod (7) and can slide relative to the guide rod (7) to adjust the distance between it and the upper spring seat (3).

3. The adjustable hovering buffer hinge assembly according to claim 1, characterized in that: The spring (5) is sleeved on the outside of the linear damper (6).

4. The adjustable hovering buffer hinge assembly according to claim 2, characterized in that: The spring (5) is sleeved on the outside of the guide rod (7).

5. The adjustable hovering buffer hinge assembly according to claim 2, characterized in that: The guide rod (7) has a first threaded section (71) and a second threaded section (72) at its upper and lower ends respectively; the upper spring seat (3) has a threaded hole (31) at its lower end. The upper end of the guide rod (7) is screwed into the threaded hole (31) of the upper spring seat (3) through the first threaded section (71). The lower end of the guide rod (7) passes through the guide hole (42) of the lower spring seat (4) and extends out of the lower end of the lower spring seat (4). Two first nuts (73) are screwed onto the second threaded section (72).

6. The adjustable hovering buffer hinge assembly according to claim 3, characterized in that: The upper spring seat (3) has a first recess (33) at its lower end. The upper end of the linear damper (6) is embedded in the first groove (331) at the bottom of the first recess (33). The upper end of the spring (5) is embedded in the second groove (332) at the opening of the first recess (33). The lower outer side of the upper spring seat (3) also has several first positioning holes (34) that penetrate the second groove (332). The upper end of the spring (5) is also exposed in the first positioning holes (34). The lower spring seat (4) is provided with a second recess (43) at its upper end. The lower end of the linear damper (6) is embedded in the third groove (431) at the bottom of the second recess (43). The lower end of the spring (5) is embedded in the fourth groove (432) at the opening of the second recess (43). The upper outer side of the lower spring seat (4) is also provided with several second positioning ports (433) that penetrate the fourth groove (432). The lower end of the spring (5) is also exposed in the second positioning ports (433).

7. The adjustable hovering buffer hinge assembly according to claim 4, characterized in that: The upper spring seat (3) is provided with a first threaded groove (301) at its lower end. The first external thread (61) of the upper periphery of the linear damper (6) is screwed onto the first threaded groove (301) to be fixedly assembled with the upper spring seat (3). The lower spring seat (4) is provided with a second threaded groove (401) at its upper end. The second external thread (62) of the lower periphery of the linear damper (6) is screwed onto the second threaded groove (401) to be fixedly assembled with the lower spring seat (4).

8. The adjustable hovering buffer hinge assembly according to any one of claims 1-7, characterized in that: The upper end of the lower hinge (1) is rotatably connected to the upper hinge (2) via a rotating shaft (13). Both sides of the upper end of the lower hinge (1) are provided with arc holes (14). The sliding shaft (15) passes through the arc holes (14) and is connected to the first shaft hole (21) at the lower end of the upper hinge (2) and the second shaft hole (32) of the upper spring seat (3), so that the upper hinge (2) and the upper spring seat (3) are rotatably connected. After the upper hinge (2) rotates relative to the lower hinge (1), the sliding shaft (15) slides along the arc holes (14) and pulls the upper spring seat (3) to rotate.

9. The adjustable hovering buffer hinge assembly according to any one of claims 1-6, characterized in that: The lower hinge (1) has two upwardly extending first pivot plates (16) on both sides of its upper end, and a first clearance opening (160) is formed between the two first pivot plates (16) for the lower end of the upper hinge (2) and the upper spring seat (3) to rotate; the upper hinge (2) has two downwardly extending second pivot plates (22) on both sides of its lower end that are rotatably assembled with the first pivot plates (16).

10. The adjustable hovering buffer hinge assembly according to any one of claims 1-6, characterized in that: The lower hinge (1) has a number of hoist mounting holes (17) in the middle for installation, and the lower end of the lower hinge (1) has a number of positioning holes (18) that extend downward and penetrate the lower end face of the lower hinge (1); the upper hinge (2) has a number of second mounting holes (23) in the middle.

Images