Adjustable hovering buffer hinge assembly

Abstract

The invention 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 through penetrating installation of the gear adjusting shaft and the gear shaft holes in different positions, and then the pre-compression amount of the spring and the linear damper is adjusted, so that the multi-angle hovering function of the multi-angle hovering mechanism is achieved.

Description

Technical Field:

[0001] The present invention relates to the technical field of hinge products, and particularly refers to an adjustable hover buffer hinge assembly. Background Art:

[0002] Common horizontal refrigerator hinges on the existing market usually have no damping effect. During the falling process, the refrigerator door needs to be held by hand all the time. Otherwise, the refrigerator door will fall rapidly, generating a large closing sound and impact damage, and it is easy to pinch the hand when not paying attention. In addition, there are also some horizontal refrigerator hinges with damping buffer falling in the prior art. However, these horizontal refrigerator hinges usually do not have the multi-angle hovering function. That is, every time the refrigerator is opened, if you want the refrigerator door to stop, you need to hold it by hand all the time or open it to the maximum angle. This is time-consuming, laborious and inconvenient for single-handed operation.

[0003] To solve the above problems, someone proposed an assisting hinge, a horizontal freezer and a working method (application number: 202210880969.7). The assisting hinge includes a hinge head, a connecting rod, a supporting rod, a supporting seat, a hinge seat and a spring. The two ends of the connecting rod are connected to the hinge head and the supporting rod. When the hinge head rotates, the rotating end of the connecting rod is limited by the connecting shaft on the hinge head to realize the ability to limit the flipping of the box cover. When the horizontal freezer is closed, the spring is in a compressed state and is affected by the magnetic attraction device, unable to push the hinge head and the box cover to move. When the box cover moves, it drives the hinge head to flip upward together. The hinge head drives the connecting rod to flip upward through the first connecting shaft, and the connecting rod drives the supporting rod to move upward. At this time, the spring begins to stretch, and the supporting seat cannot move downward, causing the spring to stretch upward. Through the action of the spring washer, the supporting rod also moves upward to form an opening assistance to facilitate the opening of a larger box cover. When taking out or storing items in the horizontal freezer, due to the assistance of the spring, the box cover can be hovered.

[0004] However, the above-mentioned assisting hinge has no buffering effect, and the hovering angle is usually not adjustable, resulting in inconvenient use. Moreover, the above-mentioned assisting hinge cannot adjust the falling time of the box cover and the minimum hovering angle, and cannot improve the user experience.

[0005] In view of this, the inventor of the present invention proposes the following technical solutions. Summary of the Invention:

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an adjustable hover buffer hinge assembly.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: The adjustable hover buffer hinge assembly includes a lower hinge, an upper hinge rotatably mounted on the upper end of the lower hinge, an upper spring seat disposed at the lower end of the upper hinge and rotatable relative to the upper hinge, a lower spring seat mounted in the middle or at the 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; A plurality of gear shaft holes are distributed along the length direction on the outer side of the lower hinge. A first gear adjustment shaft passes through the gear shaft holes and is inserted into the transverse shaft hole of the lower spring seat, so that the lower spring seat is mounted in the lower hinge in a manner of adjustable relative position, and the distance between the lower spring seat and the upper spring seat can be adjusted by passing the gear adjustment shaft through the gear shaft holes at different positions, thereby adjusting the pre-compression amount of the spring and the linear damper.

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

[0011] Furthermore, in the above technical solution, the upper and lower ends of the guide rod are respectively provided with a first thread section and a second thread section; A threaded hole is provided at the lower end of the upper spring seat. The upper end of the guide rod is helically fixed in the threaded hole of the upper spring seat through the first thread 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 helically fixed on the second thread section.

[0012] Furthermore, in the above technical solution, a first sink is provided at the lower end of the upper spring seat. The upper end of the linear damper is inlaid and installed in the first groove at the bottom of the first sink. The upper end of the spring is inlaid in the second groove at the opening of the first sink. Among them, several first positioning ports penetrating the second groove are also provided on the outer side of the lower end of the upper spring seat, and the upper end of the spring is also exposed in the first positioning ports; A second sink is provided at the upper end of the lower spring seat. The lower end of the linear damper is inlaid and installed in the third groove at the bottom of the second sink. The lower end of the spring is inlaid in the fourth groove at the opening of the second sink. Among them, several second positioning ports penetrating the fourth groove are also provided on the outer side of the upper end of the lower spring seat, and the lower end of the spring is also exposed in the second positioning ports.

[0013] Furthermore, in the above technical solution, a first threaded groove is provided at the lower end of the upper spring seat, and a 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; a second threaded groove is provided at the upper end of the lower spring seat, and a 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 through a rotating shaft, and arc-shaped holes are provided on both side surfaces of the upper end of the lower hinge. The sliding shaft passes through the arc-shaped holes and 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-shaped hole and pulls the upper spring seat to rotate.

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

[0016] Furthermore, in the above technical solution, a plurality of gourd mounting holes for installation are provided in the middle of the lower hinge, and a plurality of positioning holes are provided at the lower end of the lower hinge. The positioning holes extend downward and penetrate the lower end surface of the lower hinge; a plurality of second mounting holes are provided in the middle of the upper hinge.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] 1. The present invention is provided with a linear damper, which is used to provide a damping force during the rotation of the upper hinge relative to the lower hinge, that is, the linear damper provides a damping force during the process of the refrigerator door closing and falling relative to the refrigerator body. It can make the refrigerator door slowly descend, achieving a buffering effect, and avoiding pinching hands due to sudden drop and closing by its own gravity; in addition, important component parts such as the linear damper, spring, guide rod, and lower spring seat are all installed within the envelope of the lower hinge, making the structure of the present invention more compact, further reducing the space, and being beneficial for application in some structures with high space requirements.

[0019] 2. The multi-angle hovering function of the present invention can be achieved by adjusting the viscosity of the damping oil in the linear damper and the compression amount of the adjusting spring. During specific use, according to actual usage requirements, the lower spring seat can be pushed to slide relative to the guide rod to adjust the distance between the lower spring seat and the upper spring seat. Then, the gear adjustment shaft is passed through the gear shaft hole of the lower hinge and through the transverse shaft hole of the lower spring seat, so that the lower spring seat is fixed in a rotatable manner in the lower spring seat, and the distance between the lower spring seat and the upper spring seat is adjusted to adjust the pre-compression amount of the spring and the linear damper, thereby realizing the adjustability of the falling time and the minimum hovering angle of the refrigerator door 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 compression amount of the spring is released, generating a thrust force whose direction is opposite to the direction of the gravity force received by the refrigerator door, realizing the function of a light opening force. BRIEF DESCRIPTION OF THE DRAWINGS:

[0021] Figure 1 is a perspective view of Embodiment 1 of the present invention;

[0022] Figure 2 is a perspective view of another angle of Embodiment 1 of the present invention;

[0023] Figure 3 is an exploded view of Embodiment 1 of the present invention;

[0024] Figure 4 is a perspective view of the lower spring seat in Embodiment 1 of the present invention.

[0025] Figure 5 is a perspective view of Embodiment 2 of the present invention;

[0026] Figure 6 is an exploded perspective view of Embodiment 2 of the present invention;

[0027] Figure 7 is a perspective view of the lower spring seat in Embodiment 2 of the present invention;

[0028] Figure 8 is a perspective view of Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS:

[0029] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings.

[0030] Embodiment 1:

[0031] As Figure 1-4 shown, it is an adjustable hovering buffer hinge assembly, which 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] The present invention can be used on refrigerators and also on other products (such as printers, dishwashers, etc.) with flip lids / doors that open and close vertically.

[0033] Among them, the upper hinge 2 is rotatably installed at the upper end of the lower hinge 1. The upper spring seat 3 is arranged at the lower end of the upper hinge 2 and can rotate relative to the upper hinge 2. The lower spring seat 4 is installed in the middle or at the lower end of the lower hinge 1. The spring 5 is arranged 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. The spring 5 is sleeved outside 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 outside the guide rod 7 and can slide relative to the guide rod 7 to adjust the distance between the lower spring seat 4 and the upper spring seat 3. Among them, a plurality of gear position shaft holes 11 are distributed along the length direction on the outer side of the lower hinge 1. A first gear position adjusting shaft 12 passes through the gear position shaft holes 11 and is inserted into 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 a manner of adjustable relative position, and the distance between the lower spring seat 4 and the upper spring seat 3 can be adjusted by passing the gear position adjusting shaft 12 through the gear position shaft holes 11 at different positions, thereby adjusting the pre-compression amounts of the spring 5 and the linear damper 6.

[0034] In specific use, the lower hinge 1 is fixed to the refrigerator main body, and the upper hinge 2 is fixed to the refrigerator door, so that the refrigerator door is hinged to the refrigerator main body; the present invention is additionally provided with a linear damper 6, and the linear damper 6 is used to provide a damping force during the rotation of the upper hinge 2 relative to the lower hinge 1, that is, the linear damper 6 provides a damping force during the process of the refrigerator door closing and falling relative to the refrigerator main body, which can make the refrigerator door slowly descend to achieve a buffering effect and avoid pinching hands due to sudden falling and closing by its own gravity; in addition, important components such as the linear damper 6, the spring 5, the guide rod 7, and the lower spring seat 4 are all installed within the envelope of the lower hinge, making the structure of the present invention more compact, further reducing the space, and being beneficial to applications on some structures with high space requirements. The multi-angle hovering function of the present invention can be achieved by adjusting the viscosity of the damping oil in the linear damper and the compression amount of the spring compression. In specific use, according to the actual use requirements, the lower spring seat 4 can be pushed to slide relative to the guide rod 7 to adjust the distance between the lower spring seat 4 and the upper spring seat 3. The guide rod 7 realizes the guiding function, 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 fixed to the lower spring seat 4 in a rotatable manner, and the distance between the lower spring seat 4 and the upper spring seat 3 is adjusted to adjust the pre-compression amounts of the spring 5 and the linear damper 6, thereby realizing the adjustability of the falling time and the minimum hovering angle of the refrigerator door to meet different use 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 amount of the spring 5 is released, generating a thrust force, and the direction of the force is opposite to the direction of the gravity received by the refrigerator door, realizing the function of a light opening force.

[0035] The following specifically describes the installation structure of the guide rod 7:

[0036] The upper and lower ends of the guide rod 7 are respectively provided with a first threaded section 71 and a second threaded section 72. Except for the first threaded section 71 and the second threaded section 72 at the upper and lower ends, other parts of the guide rod 7 are all smooth rods, which is convenient for the lower spring seat 4 to slide relative to the guide rod 7 to adjust the relative position.

[0037] Among them, a threaded hole 31 is provided at the lower end of the upper spring seat 3. The upper end of the guide rod 7 is helically fixed in the threaded hole 31 of the upper spring seat 3 through the first threaded section 71. Its 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. And two first nuts 73 are helically fixed on the second threaded section 72. It can effectively prevent the guide rod 7 from disengaging from the guide hole 42 of the lower spring seat 4, ensure the stability of the assembly structure, and two first nuts 73 are helically installed on the second threaded section 72, which can achieve the purpose of interlocking and make the first nut stably installed on the second threaded section 72.

[0038] One end of the gear adjustment shaft 12 is provided with a first convex cap 121, and the other end is provided with a first card slot 122. A first circlip 123 is installed in the first card slot 122. The first convex cap abuts against one side surface of the lower hinge 1, and the first circlip 123 abuts against the other side surface 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 through a rotating shaft 13. Among them, one end of the rotating shaft 13 is provided with a second convex cap 131, and the other end is provided with a second card slot 132. A second circlip 133 is installed in the second card slot 132. The second convex cap abuts against one side surface of the lower hinge 1, and the second circlip 133 abuts against the other side surface of the lower hinge 1. Its assembly structure is extremely simple.

[0041] Both side surfaces 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 form a rotatable connection. And after the upper hinge 2 rotates relative to the lower hinge 1, the sliding shaft 15 slides along the arc hole 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 can limit the rotation angle of the upper hinge 2 relative to the lower hinge 1 to avoid excessive rotation.

[0042] One end of the sliding shaft 15 is provided with a third convex cap 151, and the other end is provided with a third card slot 152. A third circlip 153 is installed in the third card slot 152. And a gasket 154 is sleeved on the other end of the sliding shaft 15. The third circlip 153 abuts against the outer side surface of the gasket 154. The third convex cap abuts against one side surface of the lower hinge 1, and the inner side surface of the gasket 154 abuts against the other side surface of the lower hinge 1. It can effectively prevent the sliding shaft 15 from disengaging, and the assembly structure is extremely simple.

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

[0044] A first sunk groove 33 is provided at the lower end of the upper spring seat 3. The upper end of the linear damper 6 is inlaid and installed in a first groove body 331 at the bottom of the first sunk groove 33. The upper end of the spring 5 is inlaid in a second groove body 332 at the opening of the first sunk groove 33. Among them, a plurality of first positioning ports 34 penetrating through the second groove body 332 are further provided on the outer side of the lower end of the upper spring seat 3, and the upper end of the spring 5 is also exposed in the first positioning ports 34. Its assembly structure is stable and the installation is convenient. A second sunk groove 43 is provided at the upper end of the lower spring seat 4. The lower end of the linear damper 6 is inlaid and installed in a third groove body 431 at the bottom of the second sunk groove 43. The lower end of the spring 5 is inlaid in a fourth groove body 432 at the opening of the second sunk groove 43. Among them, a plurality of second positioning ports 433 penetrating through the fourth groove body 432 are further provided on the outer side of the upper end of the lower spring seat 4, and the lower end of the spring 5 is also exposed in the second positioning ports 433. Its assembly structure is stable and the installation is convenient.

[0045] On both sides of the upper end of the lower hinge 1, first pivot plates 16 extending upward are formed. A first avoidance opening 160 for the lower end of the upper hinge 2 and the upper spring seat 3 to rotate is formed between the two first pivot plates 16. The design of the first avoidance opening 160 can ensure that when the lower end of the upper hinge 2 and the upper spring seat 3 rotate, they will not collide with the lower hinge 1, thus guaranteeing the stability and smoothness of the rotation; On both sides of the lower end of the upper hinge 2, second pivot plates 22 extending downward and rotatably assembled with the first pivot plates 16 are formed, which is convenient for installation.

[0046] A plurality of gourd installation holes 17 for installation are provided in the middle of the lower hinge 1. Screws pass through the gourd installation holes 17 and are fixedly installed with the refrigerator main body. And a plurality of positioning holes 18 are provided at the lower end of the lower hinge 1, and the positioning holes 18 are inlaid and positioned with the positioning parts on the refrigerator main body, so that the lower hinge is stably installed on the refrigerator main body. The positioning holes 18 extend downward and penetrate the lower end face of the lower hinge 1; A plurality of second installation holes 23 are provided in the middle of the upper hinge 2. Screws pass through the second installation holes 23 and are fixedly connected with the refrigerator door. Its assembly structure is simple and the structure is stable.

[0047] When the present invention is in specific use, since a linear damper 6 is installed inside the present invention, during the process of the refrigerator door closing and falling, the upper hinge 2 rotates around the rotating shaft 13, driving the upper spring seat 3 and the sliding shaft 15 to move in the arc-shaped hole 14 of the lower hinge 1. The upper spring seat 3 and the lower spring seat 4 slide relative to each other along the guide rod 7, compressing the linear damper 6, causing the linear damper 6 to generate a damping force, making the refrigerator door slowly fall, reducing the impact force, and forming a comfortable closing effect; the spring 5 is sleeved outside the linear damper 6. During the closing process of the refrigerator door, the spring 5 is also compressed together with the linear damper 6. When the reaction force generated by the compression of the spring 5 reaches equilibrium with the gravity received by the refrigerator door, the refrigerator door can maintain the opening and closing angle unchanged, realizing the hovering function; there is a row of evenly distributed gear shaft holes 11 at the lower end of the lower hinge 1, and the gear adjustment shaft 12 cooperates with different gear shaft holes 11 to adjust the pre-compression amount of the spring 5 and the linear damper 6, so as to adjust the falling time of the refrigerator door and the minimum hovering angle. 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 amount of the spring 5 is released, generating a thrust force, and the direction of the force is opposite to the direction of the gravity received by the refrigerator door, realizing the function of a light opening force.

[0048] In summary, the present invention adds a linear damper 6, which is used to provide a damping force during the rotation of the upper hinge 2 relative to the lower hinge 1, that is, the linear damper 6 provides a damping force during the process of the refrigerator door closing and falling relative to the refrigerator body. It can make the refrigerator door slowly descend, achieving a buffering effect, and avoiding pinching hands due to the sudden drop and closing of its own gravity; in addition, important component parts such as the linear damper 6, the spring 5, the guide rod 7, and the lower spring seat 4 are all installed within the envelope of the lower hinge, making the structure of the present invention more compact, further reducing the space, and being beneficial for application in some structures with high space requirements. The multi-angle hovering function of the present invention can be realized by adjusting the viscosity of the damping oil in the linear damper and the compression amount of the spring compression. When in specific use, according to the actual use requirements, the lower spring seat 4 can be pushed to slide relative to the guide rod 7 to adjust the distance between the lower spring seat 4 and the upper spring seat 3, and 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 fixed in the lower spring seat 4 in a rotatable manner, and the distance between the lower spring seat 4 and the upper spring seat 3 is adjusted to adjust the pre-compression amount of the spring 5 and the linear damper 6, thereby realizing the adjustability of the falling time of the refrigerator door and the minimum hovering angle, meeting different use 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 amount of the spring 5 is released, generating a thrust force, and the direction of the force is opposite to the direction of the gravity received by the refrigerator door, realizing the function of a light opening force.

[0049] Embodiment 2:

[0050] The difference between the second embodiment and the first embodiment described above is as follows: In combination with Figure 6 and Figure 7 as shown, in the second embodiment, two guide rods 7 are cancelled, and the threaded holes 31 of the upper spring seat 3 and the guide holes 42 of the lower spring seat 4 are also cancelled; external threads are designed at both ends of the linear damper 6, and threaded grooves adapted to the external threads are provided on both the upper spring seat 3 and the lower spring seat 4. Specifically, a first threaded groove 301 is provided at the lower end of the upper spring seat 3, and the first external thread 61 on the outer periphery of the upper end of the linear damper 6 is helically installed with the first threaded groove 301 to be fixedly assembled with the upper spring seat 3; a second threaded groove 401 is provided at the upper end of the lower spring seat 4, and the second external thread 62 on the outer periphery of the lower end of the linear damper 6 is helically installed with the second threaded groove 401 to be fixedly assembled with 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, so that only axial movement can exist between the upper spring seat 3 and the lower spring seat 4, which well replaces the guiding function of the original guide rod 7. Since the guide rods 7 are not installed on both sides of the upper spring seat 3 and the lower spring seat 4, the space of the lower hinge 1 in width can be reduced, improving the space utilization rate of the adjustable hover buffer hinge assembly; in terms of assembly, the assembly process is further reduced, the efficiency is improved, and the cancellation of the two guide rods 7 reduces the number of parts of the adjustable hover buffer hinge assembly, and also further reduces the overall cost of the adjustable hover buffer hinge assembly.

[0051] Except for the above, the other structures of the second embodiment are the same as those of the first embodiment, and can achieve the same technical effects as the first embodiment, and will not be elaborated here one by one.

[0052] Embodiment Three:

[0053] The difference between the third embodiment and the first embodiment described above is as follows: In combination with Figure 8 as shown, in the third embodiment, one spring 5 sleeved outside the linear damper 7 is changed to two springs 5 sleeved on the guide rod 7. That is, the third embodiment uses two springs 5, and the two springs are respectively sleeved on the two guide rods 7 one by one, and the two springs 5 are symmetrically distributed on both sides, which can ensure that the overall force of the adjustable hover buffer hinge assembly is more balanced, and the adjustable range of the total spring stiffness formed by the two springs 5 is larger, so that the adjustable hover buffer hinge assembly can be applicable to a wider range of refrigerator door weights.

[0054] Except for the above, the other structures of the third embodiment are the same as those of the first embodiment, and can achieve the same technical effects as the first embodiment, and will not be elaborated here one by one.

[0055] Certainly, the above are only specific embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention shall be included in the scope of the patent application of the present invention.

Claims

1. An adjustable hover buffer hinge assembly, which comprises a lower hinge (1), an upper hinge (2) rotatably mounted on the upper end of the lower hinge (1), an upper spring seat (3) arranged at the lower end of the upper hinge (2) and rotatable relative to the upper hinge (2), a lower spring seat (4) mounted in the middle or at the lower end of the lower hinge (1), and a spring (5) arranged between the lower spring seat (4) and the upper spring seat (3), and is characterized in that: A linear damper (6) for buffering is further connected between the lower spring seat (4) and the upper spring seat (3); A plurality of gear shaft holes (11) distributed along the length direction are arranged on the outer side of the lower hinge (1). A first gear adjustment shaft (12) passes through the gear shaft holes (11) and is inserted into the transverse shaft hole (41) of the lower spring seat (4), so that the lower spring seat (4) is mounted in the lower hinge (1) in a manner of adjustable relative position, and the distance between the lower spring seat (4) and the upper spring seat (3) can be adjusted by passing the gear adjustment shaft (12) through the gear shaft holes (11) at different positions, thereby adjusting the pre-compression amount of the spring (5) and the linear damper (6).

2. The adjustable hover buffer hinge assembly according to claim 1, wherein: A guide rod (7) is further fixed at the lower end of the upper spring seat (3); the lower spring seat (4) is sleeved outside the guide rod (7) and can slide relative to the guide rod (7) to adjust the distance between the lower spring seat (4) and the upper spring seat (3).

3. The adjustable hover buffer hinge assembly according to claim 1 or 2, characterized in that: The spring (5) is sleeved outside the linear damper (6).

4. The adjustable hover buffer hinge assembly according to claim 2, wherein: The spring (5) is sleeved outside the guide rod (7).

5. The adjustable hover buffer hinge assembly according to claim 2, wherein: The upper and lower ends of the guide rod (7) are respectively provided with a first thread section (71) and a second thread section (72); a threaded hole (31) is provided at the lower end of the upper spring seat (3). The upper end of the guide rod (7) is helically fixed in the threaded hole (31) of the upper spring seat (3) through the first thread 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), and two first nuts (73) are helically fixed on the second thread section (72).

6. The adjustable hover buffer hinge assembly according to claim 3, wherein: A first sink (33) is provided at the lower end of the upper spring seat (3). The upper end of the linear damper (6) is inlaid and mounted in the first groove body (331) at the bottom of the first sink (33). The upper end of the spring (5) is inlaid in the second groove body (332) at the opening of the first sink (33). Among them, a plurality of first positioning ports (34) penetrating through the second groove body (332) are further provided on the outer side of the lower end of the upper spring seat (3), and the upper end of the spring (5) is also exposed in the first positioning ports (34); a second sink (43) is provided at the upper end of the lower spring seat (4). The lower end of the linear damper (6) is inlaid and mounted in the third groove body (431) at the bottom of the second sink (43). The lower end of the spring (5) is inlaid in the fourth groove body (432) at the opening of the second sink (43). Among them, a plurality of second positioning ports (433) penetrating through the fourth groove body (432) are further provided on the outer side of the upper end of the lower spring seat (4), and the lower end of the spring (5) is also exposed in the second positioning ports (433).

7. The adjustable hover buffer hinge assembly according to claim 4, wherein: A first thread groove (301) is provided at the lower end of the upper spring seat (3), and a first external thread (61) on the outer periphery of the upper end of the linear damper (6) is helically installed with the first thread groove (301) to be fixedly assembled with the upper spring seat (3); a second thread groove (401) is provided at the upper end of the lower spring seat (4), and a second external thread (62) on the outer periphery of the lower end of the linear damper (6) is helically installed with the second thread groove (401) to be fixedly assembled with the lower spring seat (4).

8. The adjustable hover 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) through a rotating shaft (13), and arc-shaped holes (14) are provided on both side surfaces of the upper end of the lower hinge (1). A sliding shaft (15) passes through the arc-shaped holes (14) and is connected to a first shaft hole (21) at the lower end of the upper hinge (2) and a 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-shaped holes (14) and pulls the upper spring seat (3) to rotate.

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

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

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