American buffer hinge
By introducing adjusters and travel limiters into American-style hinges, multi-level buffer travel selection is achieved, solving the limitation in use caused by the fixed buffer travel of existing American-style hinges. This provides smooth opening and stable buffering, improving the adaptability and assembly efficiency of the hinges.
Patent Information
- Application Number
- CN202511610729.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-02-03
AI Technical Summary
Existing American-style hinges have a fixed buffer travel, making it difficult to adapt to door panels of different weights and sizes, as well as the diverse needs of users for closing speed and buffering force, resulting in problems such as delayed closing or insufficient buffering.
Design an American-style buffer hinge, comprising a hinge base, connecting rod, hinge cup and buffer mechanism, to achieve multi-level buffer stroke selection through the stroke limit component in the adjuster, to utilize the reliable contact between the moving part and the limit part to trigger the buffer function, and to switch the limit state by rotating the adjuster to provide at least three levels of operation.
It achieves smooth, interference-free door opening, eliminates closing impact and noise, and features an intuitive and reliable adjustment process. It also reduces structural complexity and cost, and improves the versatility and ease of assembly of the hinges.
Smart Images
Figure CN121451806A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hinge technology, and more specifically to an American-style buffer hinge. Background Technology
[0002] American hinges are widely used connecting components in modern furniture (such as cabinets and wardrobes). They enable the door panels to rotate and open / close through core structures such as hinge arms and hinge cups. To improve the user experience, many American hinges on the market now integrate damping devices, designed to provide a damping effect at the end of the door closing process, thereby achieving a smooth and quiet closing effect and reducing impact and noise.
[0003] Existing soft-close hinges typically have a fixed buffer travel. This fixed travel design reveals certain limitations when facing diverse application scenarios. For example, for door panels of different weights and sizes, or for users with different preferences for closing speed and buffering force, a single buffer travel is unlikely to achieve the best effect. If a lighter door panel has an excessively long buffer travel, it may cause a delayed closing action; while if a heavier door panel has an excessively short buffer travel, it may fail to completely eliminate the impact due to insufficient cushioning.
[0004] Therefore, the purpose of this invention is to propose an American-style hinge that is simple in structure, easy to adjust, and provides multiple levels of buffer travel selection. Summary of the Invention
[0005] The purpose of this invention is to solve the problem that existing American-style hinges cannot adjust the buffer travel, and to provide a buffer mechanism for cabinet door hinges.
[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: An American-style buffer hinge includes a hinge base, a connecting rod, a hinge cup, and a buffer mechanism. The hinge cup has a receiving groove. The connecting rod has a first connecting portion and a second connecting portion; the first connecting portion is connected to the hinge base, and the second connecting portion is located within the receiving groove and rotatably connected to the receiving groove. The buffer mechanism includes a damper and an adjuster. The damper is located within the receiving groove and includes a fixed portion and a movable portion that can approach or move away from each other during buffering. The movable portion is configured to abut against the second connecting portion and move under drive when the hinge cup rotates relative to the connecting rod. The moving part is provided with a limiting part; the adjuster includes a travel limiting member rotatably disposed on the outside of the buffer, the rotation position of which can be limited, and the travel limiting member remains relatively fixed to the fixed part of the buffer; the travel limiting member is provided with an abutting part; by rotating the travel limiting member, it can be selectively placed in one of at least two working positions: in the first working position, the abutting part and the limiting part at least partially overlap in the moving direction of the moving part; in the second working position, the abutting part and the limiting part do not overlap in the moving direction of the moving part.
[0007] The American-style buffer hinge provided by this invention features a compact layout where the buffer mechanism is built into the hinge cup receiving groove. When the hinge cup rotates relative to the connecting rod, the reliable contact between the movable part and the second connecting part enables precise triggering of the buffer function. This effectively eliminates closing impact and noise while ensuring smooth, interference-free door opening. Simultaneously, the axial relative position between the contact part and the upper limit part of the movable part can be changed by rotating the travel limit component in the adjuster. This provides users with an adjustment function that allows for quick switching between at least two buffer travel states, such as "limited" and "unlimited." This adjustment mechanism is simple in structure, reliable in operation, and eliminates the need for complex connecting rods or locking components, significantly simplifying the structure and reducing costs. The overall design, while ensuring stable and reliable buffer performance, achieves modularity and integration of the hinge structure, combining the advantages of high space utilization, convenient assembly, and strong versatility.
[0008] Furthermore, the limiting part includes a first limiting part and a second limiting part at different distances from the buffer fixing part; the abutting part includes a first abutting part and a second abutting part that respectively cooperate with the first limiting part and the second limiting part; by rotating the adjuster, it can be placed in three working positions: in the first working position, the first abutting part and the first limiting part at least partially overlap in the moving direction of the movable part; in the second working position, the second abutting part and the second limiting part at least partially overlap in the moving direction of the movable part; in the third working position, the first abutting part and the first limiting part, and the second abutting part and the second limiting part do not overlap in the moving direction of the movable part. This solution, by setting two limiting parts at different distances and corresponding abutting parts, can concretize the adjustment function into a clear and stable three-level operation. Users only need to rotate the adjuster to conveniently switch between the three states of "first limiting part active", "second limiting part active", and "no limit", thereby obtaining two different limited strokes and one maximum stroke. This design effectively meets the differentiated needs of different door panel weights and usage scenarios for buffering force, and the adjustment process is intuitive and reliable.
[0009] Furthermore, the base includes a first mounting part and a second mounting part that are vertically connected. The first mounting part is provided with a slide rail structure. The first connecting part is movably mounted on the first mounting part through the slide rail structure. The first connecting part is connected to one end of the second connecting part. The hinge point of the connecting rod is located at the end of the second connecting part away from the first connecting part.
[0010] Furthermore, the second connecting part includes an arc-shaped trigger part, and the buffer is correspondingly provided with an arc-shaped contact part.
[0011] Furthermore, the buffer includes a hydraulic cylinder and a mounting base. The mounting base has a mounting groove for assembling the hydraulic cylinder, and the limiting parts are located on two opposite outer sides of the mounting base, with different distances from the limiting parts on both sides to the rear end of the mounting base. In this design, the hydraulic cylinder is fixed within the mounting groove of the mounting base, forming a structurally regular and easily assembled independent buffer module. This modular design allows the buffer mechanism to be flexibly adapted as a standard component to hinge products of different models and specifications, improving product versatility and serialization development efficiency.
[0012] Furthermore, the travel limiter is slidably fitted onto the movable part of the buffer, and the abutment part is provided on the travel limiter.
[0013] Furthermore, the regulator includes an adjusting housing; the adjusting housing has a connecting groove, the bottom and rear end of which are through-holes; the movable part of the buffer is slidably connected to the connecting groove; an annular groove is provided on the connecting groove at the radial periphery of the fixed part, and the clearance adjustment groove is provided on opposite sides of the lower end port of the groove; the travel limit member is disposed in the groove, and the abutment part is provided on opposite sides of the travel limit member and located in the clearance adjustment groove; the travel limit member is also provided with a driving part, and the top of the groove has a clearance opening, through which the driving part protrudes outward. This solution is used to realize the installation and fixation of the buffer and the travel limit member, providing linear guidance for the movement of the buffer, allowing it to slide back and forth along the inner wall, while the groove integrated in the connecting groove encapsulates the travel limit member in a compact space, reducing manufacturing costs and assembly difficulty; the driving part protrudes outward through the clearance opening on the housing, providing users with an intuitive and convenient operating interface. When the buffer slides, its travel distance can be accurately limited by the selected abutment on the travel limit component, thereby reliably realizing stable switching of different buffer travel distances and enabling the hinge to better adapt to diverse application scenarios.
[0014] Furthermore, the contact part can swing up and down in the clearance adjustment groove and can protrude downward out of the clearance adjustment groove.
[0015] Furthermore, the hydraulic cylinder and the mounting base are integrally formed. This solution combines the components into one, forming a well-structured and easily assembled independent buffer module. This not only simplifies the production process and improves assembly efficiency, but also avoids dimensional errors and quality fluctuations that may be caused by multiple assembly processes, thus helping to ensure product consistency.
[0016] Furthermore, the travel limiting member is provided with a first locking part, a second locking part and a third locking part, and the side wall of the clearance opening is provided with a fourth locking part. The travel limiting member can selectively engage with the fourth locking part through any one of the first locking part, the second locking part and the third locking part.
[0017] Furthermore, the mating surface between the limiting part and the contacting part is an inclined surface.
[0018] Furthermore, the first, second, and third locking portions are all slots, and the fourth locking portion is a protrusion; or, the first, second, and third locking portions are all circular protrusions, and the fourth locking portion is a slot.
[0019] Furthermore, the drive unit is provided with markings corresponding to the first locking part, the second locking part, and the third locking part.
[0020] Furthermore, it also includes an elastic positioning component. The second mounting portion has outwardly protruding positioning portions on opposite sides. Each positioning portion has a first positioning surface and a second positioning surface. The first positioning surface and the second positioning surface have a preset included angle. The first positioning surface and the second positioning surface are connected by an arc transition. The elastic positioning component includes a main body and a first pin and a second pin extending outwardly from both sides of the main body. The opposite side walls of the receiving groove have a first through hole and a second through hole. The main body of the elastic positioning component is located outside the hinge cup and between the first through hole and the second through hole. The first pin extends into the receiving groove through the first through hole, and the second pin extends into the receiving groove through the second through hole, so that the elastic positioning component is dynamically connected to the hinge cup. When the hinge is in the unfolded state, the first pin elastically presses against the first positioning surface. When the hinge is in the folded state, the first pin elastically presses against the second positioning surface, so that the hinge remains in its current state without external force.
[0021] Furthermore, the included angle is greater than or equal to 90 degrees. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the buffer hinge in its extended state. Figure 1 ; Figure 2 This is a schematic diagram of the buffer hinge in its extended state. Figure 2 ; Figure 3 This is a schematic diagram of the buffer hinge in its folded state. Figure 1 ; Figure 4 This is a breakdown diagram of the buffer hinge in its folded state. Figure 1 ; Figure 5 This is a breakdown diagram of the buffer hinge in its folded state. Figure 2 ; Figure 6 This is an exploded diagram of the buffer hinge in its unfolded state; Figure 7 It is a structural decomposition of the buffer mechanism. Figure 1 ; Figure 8 It is a structural decomposition of the buffer mechanism. Figure 2 ; Figure 9 It is the assembly of the buffer mechanism. Figure 1 ; Figure 10 It is the assembly of the buffer mechanism. Figure 2 ; Figure 11 It is the assembly of the buffer and the travel limit component. Figure 1 ; Figure 12 It is the assembly of the buffer and the travel limit component. Figure 2 ; Figure 13 This is an exploded view of the buffer and travel limit components; Figure 14 This is a schematic diagram showing the principle of the top part cooperating with the elastic positioning component.
[0024] Label Explanation: Buffer mechanism 10, buffer 1, hydraulic cylinder 2, fixed part 21, movable part 22, arc-shaped contact part 23, mounting base 3, first limiting part 31, second limiting part 32, adjuster 4, stroke limiting component 5, first abutment part 51, second abutment part 52, first locking part 53, second locking part 54, third locking part 55, drive lever 56, marking 57, adjusting housing 6, connecting groove 60, annular groove 61, clearance adjustment groove 62, clearance passage 6 3. Fourth locking part 64, hinge base 90, first mounting part 91, second mounting part 92, slide rail structure 94, connecting rod 95, first connecting part 951, second connecting part 952, arc-shaped trigger part 953, positioning part 954, first positioning surface 954a, second positioning surface 954b, included angle, hinge cup 96, first through hole 961, second through hole 962, receiving groove 960, elastic positioning element 97, first pin 971, second pin 972. Detailed Implementation
[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings: In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0026] See Figure 1-14This invention discloses an American-style buffer hinge, including a hinge base 90, a connecting rod 95, a hinge cup 96, and a buffer mechanism 10; the hinge cup 96 is provided with a receiving groove 960; the connecting rod 95 has a first connecting part 951 and a second connecting part 952, the first connecting part 951 is connected to the hinge base 90, and the second connecting part 952 is located in the receiving groove 960 and is rotatably connected to the receiving groove 960; the buffer mechanism 10 includes a buffer 1 and an adjuster 4; the buffer 1 is disposed in the receiving groove 960 and includes a fixed part 21 and a movable part 22 that can approach or move away from each other during the buffering process; the movable part 22 is configured to be in contact with the hinge cup 96. When the connecting rod 95 rotates, it abuts against the second connecting part 952 and is driven to move; the movable part 22 is provided with a limiting part; the adjuster 4 includes a stroke limiting member 5 rotatably disposed on the outside of the buffer 1, the rotation position of which can be limited, and the stroke limiting member 5 and the fixed part 21 of the buffer 1 remain relatively fixed; the stroke limiting member 5 is provided with an abutting part; by rotating the stroke limiting member 5, it can be selectively placed in one of at least two working positions: in the first working position, the abutting part and the limiting part at least partially overlap in the moving direction of the movable part 22; in the second working position, the abutting part and the limiting part do not overlap in the moving direction of the movable part 22.
[0027] See Figure 1 , 7 -13, the limiting part includes a first limiting part 31 and a second limiting part 32 at different distances from the fixed part 21 of the buffer 1; the abutting part includes a first abutting part 51 and a second abutting part 52 that respectively cooperate with the first limiting part 31 and the second limiting part 32; by rotating the adjuster 4, it can be placed in three working positions: in the first working position, the first abutting part 51 and the first limiting part 31 at least partially overlap in the moving direction of the movable part 22; in the second working position, the second abutting part 52 and the second limiting part 32 at least partially overlap in the moving direction of the movable part 22; in the third working position, the first abutting part 51 and the first limiting part 31, and the second abutting part 52 and the second limiting part 32 do not overlap in the moving direction of the movable part 22. This solution, by setting two limiting parts at different distances and corresponding abutting parts, can concretize the adjustment function into a clear and stable three-level operation. Users can easily switch between three states—"first limit part 31 activated," "second limit part 32 activated," and "unlimited"—by simply rotating the adjuster 4, thus obtaining two different limited travel distances and one maximum travel distance. This design effectively meets the differentiated needs for cushioning force based on the weight of different door panels and usage scenarios, and the adjustment process is intuitive and reliable.
[0028] The base includes a first mounting part 91 and a second mounting part 92 that are vertically connected. The first mounting part 91 is provided with a slide rail structure 94. The first connecting part 951 is movably mounted on the first mounting part 91 through the slide rail structure 94. The first connecting part 951 is connected to one end of the second connecting part 952. The hinge point of the connecting rod 95 is located at the end of the second connecting part 952 away from the first connecting part 951.
[0029] The second connecting part 952 mentioned above includes an arc-shaped trigger part 953, and the buffer 1 is correspondingly provided with an arc-shaped contact part 24.
[0030] The aforementioned buffer 1 includes a hydraulic cylinder 2 and a mounting base 3. The mounting base 3 has a mounting groove for assembling the hydraulic cylinder 2, and limiting parts are located on two opposite outer sides of the mounting base 3, with different distances from the limiting parts on both sides to the rear end of the mounting base 3. In this design, the hydraulic cylinder 2 is fixed within the mounting groove of the mounting base 3, forming a structurally regular and easily assembled independent buffer module. This modular design allows the buffer mechanism 10 to be flexibly adapted as a standard component to hinge products of different models and specifications, improving product versatility and serialization development efficiency.
[0031] The aforementioned travel limit member 5 is slidably fitted onto the movable part 22 of the buffer 1, and the contact part is provided on the travel limit member 5.
[0032] The aforementioned regulator 4 includes an adjusting housing 6; the adjusting housing 6 is provided with a connecting groove 60, the bottom and rear end of which are through; the movable part 22 of the buffer 1 is slidably connected to the connecting groove 60; an annular groove 61 is provided on the connecting groove 60 at the radial periphery of the fixed part 21, and clearance adjustment grooves 62 are provided on opposite sides of the lower end port of the groove 61; a stroke limiter 5 is disposed in the groove 61, and the abutting part is provided on opposite sides of the stroke limiter 5 and is located in the clearance adjustment groove 62; the stroke limiter 5 is also provided with a driving part, and a clearance passage 63 is provided at the top of the groove 61, through which the driving part passes and protrudes outward. This solution enables the installation and fixation of the buffer 1 and the travel limiter 5, providing linear guidance for the movement of the buffer 1, allowing it to slide back and forth along the inner wall. The slot 61 integrated within the connecting groove 60 encapsulates the travel limiter 5 within a compact space, reducing manufacturing costs and assembly difficulty. The drive unit protrudes outward through the clearance opening 63 on the outer shell, providing users with an intuitive and convenient operating interface. When the buffer 1 slides, its movement stroke is accurately limited by the selected abutment on the travel limiter 5, thereby reliably achieving stable switching between different buffer strokes and enabling the hinge to better adapt to diverse application scenarios.
[0033] The aforementioned contact part can swing up and down in the air-avoidance adjustment groove 62, and can protrude downwards beyond the air-avoidance adjustment groove 62.
[0034] The aforementioned hydraulic cylinder 2 and mounting base 3 are integrally formed. This solution combines the components into one, forming a well-structured and easily assembled independent buffer module. This not only simplifies the production process and improves assembly efficiency, but also avoids dimensional errors and quality fluctuations that may be caused by multiple assembly processes, thus helping to ensure product consistency.
[0035] The aforementioned travel limit member 5 is provided with a first locking part 53, a second locking part 54 and a third locking part 55, and a fourth locking part 64 is provided on the side wall of the clearance opening 63. The travel limit member 5 can selectively engage with the fourth locking part 64 through any one of the first locking part 53, the second locking part 54 and the third locking part 55.
[0036] The mating surface between the aforementioned limiting part and the contacting part is an inclined surface.
[0037] The first locking part 53, the second locking part 54 and the third locking part 55 are all slots, and the fourth locking part 64 is a protrusion; or, the first locking part 53, the second locking part 54 and the third locking part 55 are all circular protrusions, and the fourth locking part 64 is a slot.
[0038] The drive unit is provided with a mark 57 corresponding to the first locking part 53, the second locking part 54 and the third locking part 55.
[0039] See Figure 1-6 14, also includes an elastic positioning member 97. The second mounting portion 92 has outwardly protruding positioning portions 954 on opposite sides. Each positioning portion 954 has a first positioning surface 954a and a second positioning surface 954b. The first positioning surface 954a and the second positioning surface 954b have a preset included angle α. The first positioning surface 954a and the second positioning surface 954b are connected by an arc transition. The elastic positioning member 97 includes a main body and first pins 971 and second pins 972 extending outwardly from both sides of the main body. The opposite side walls of the receiving groove 960 have first through holes 961 and second through holes 962. The outer wall of the hinge cup 96 has a mounting recess between the first through holes 961 and the second through holes 962. The main body of the elastic positioning member 97 is located at the hinge... The elastic positioning member 97 is located on the outer side of the hinge cup 96, between the first through hole 961 and the second through hole 962. The first pin 971 extends into the receiving groove 960 through the first through hole 961, and the second pin 972 extends into the receiving groove 960 through the second through hole 962. This allows the elastic positioning member 97 to be dynamically connected to the hinge cup 96. When the hinge is in the unfolded state, the first pin 971 elastically presses against the first positioning surface 954a. When the hinge is in the folded state, the first pin 971 elastically presses against the second positioning surface 954b. The second pin 972 always provides a reverse elastic support force, working in conjunction with the first pin 971 to ensure that the elastic positioning member 97 rotates stably with the hinge cup 96, so that the hinge remains in its current state without external force. Furthermore, the included angle α is less than 90 degrees.
[0040] The American-style buffer hinge provided by this invention features a compact layout where the buffer mechanism 10 is built into the receiving groove 960 of the hinge cup 96. When the hinge cup 96 rotates relative to the connecting rod 95, the buffer function is precisely triggered by the reliable contact between the movable part 22 and the second connecting part 952. This effectively eliminates the impact and noise of closing the door and ensures smooth and interference-free opening of the door panel. At the same time, the axial relative position between the contact part and the upper limit part of the movable part 22 can be changed by the stroke limit member 5 in the rotary adjuster 4. This provides users with an adjustment function that allows for quick switching between at least two buffer stroke states, such as "limited position" and "unlimited position". This adjustment mechanism has a simple structure and reliable operation, and does not require complex connecting rods or locking components, which significantly simplifies the structure and reduces costs. The overall design achieves modularity and integration of the hinge structure while ensuring stable and reliable buffer performance. It also has the comprehensive advantages of high space utilization, convenient assembly, and strong versatility.
[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this invention should also fall within the protection scope of the claims of this invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this invention.
Claims
1. An American-style buffer hinge, characterized in that, The device includes a hinge base, a connecting rod, a hinge cup, and a buffer mechanism. The hinge cup has a receiving groove. The connecting rod has a first connecting portion and a second connecting portion. The first connecting portion is connected to the hinge base, and the second connecting portion is located in the receiving groove and rotatably connected to the receiving groove. The buffer mechanism includes a buffer and an adjuster. The buffer is located in the receiving groove and includes a fixed portion and a movable portion that can approach or move away from each other during buffering. The movable portion is configured to abut against the second connecting portion and move under drive when the hinge cup rotates relative to the connecting rod. The movable portion has a limiting portion. The adjuster includes a travel limiting member rotatably disposed outside the buffer, whose rotational position can be limited, and the travel limiting member remains relatively fixed to the fixed portion of the buffer. The travel limiting member has an abutting portion. By rotating the travel limiting member, it can be selectively placed in at least one of two working positions: in the first working position, the abutting portion and the limiting portion at least partially overlap in the moving direction of the movable portion; in the second working position, the abutting portion and the limiting portion do not overlap in the moving direction of the movable portion.
2. The American-style buffer hinge according to claim 1, characterized in that, The limiting part includes a first limiting part and a second limiting part at different distances from the buffer fixing part; the abutting part includes a first abutting part and a second abutting part that respectively cooperate with the first limiting part and the second limiting part; by rotating the adjuster, it can be placed in three working positions: in the first working position, the first abutting part and the first limiting part at least partially overlap in the moving direction of the movable part; in the second working position, the second abutting part and the second limiting part at least partially overlap in the moving direction of the movable part; in the third working position, the first abutting part and the first limiting part, and the second abutting part and the second limiting part do not overlap in the moving direction of the movable part.
3. The American-style buffer hinge according to claim 1 or 2, characterized in that, The base includes a first mounting part and a second mounting part that are vertically connected. The first mounting part is provided with a slide rail structure. The first connecting part is movably mounted on the first mounting part through the slide rail structure. The first connecting part is connected to one end of the second connecting part. The hinge point of the connecting rod is located at the end of the second connecting part away from the first connecting part.
4. The American-style buffer hinge according to claim 1 or 2, characterized in that, The second connecting part includes an arc-shaped trigger part, and the buffer is correspondingly provided with an arc-shaped contact part.
5. The American-style buffer hinge according to claim 1 or 2, characterized in that, The buffer includes a hydraulic cylinder and a mounting base. The mounting base is provided with a mounting groove for assembling the hydraulic cylinder. The limiting parts are located on two opposite outer sides of the mounting base, and the distances from the limiting parts on both sides to the rear end of the mounting base are different.
6. The American-style buffer hinge according to claim 5, characterized in that, The travel limiter is slidably fitted onto the movable part of the buffer, and the abutment part is provided on the travel limiter.
7. The American-style buffer hinge according to claim 3, characterized in that, The regulator includes an adjusting housing; the adjusting housing has a connecting groove, the bottom and rear end of which are through; the movable part of the buffer is slidably connected to the connecting groove; an annular groove is provided on the connecting groove at the radial periphery of the fixed part, and the clearance adjustment groove is provided on the opposite sides of the lower end port of the groove; the travel limit member is disposed in the groove, and the abutting part is provided on the opposite sides of the travel limit member and is located in the clearance adjustment groove; the travel limit member is also provided with a driving part, and the top of the groove has a clearance opening, the driving part passes through the clearance opening and protrudes outward.
8. The American-style buffer hinge according to claim 4 or 5, characterized in that, The hydraulic cylinder and the mounting base are integrally formed.
9. The American-style buffer hinge according to claim 8, characterized in that, The travel limiter is provided with a first locking part, a second locking part and a third locking part, and the side wall of the clearance opening is provided with a fourth locking part. The travel limiter can selectively engage with the fourth locking part through any one of the first locking part, the second locking part and the third locking part; the drive part is provided with markings corresponding to the first locking part, the second locking part and the third locking part.
10. The American-style buffer hinge according to claim 1 or 2, characterized in that, It also includes an elastic positioning component. The second mounting portion has outwardly protruding positioning portions on opposite sides. Each positioning portion has a first positioning surface and a second positioning surface. The first positioning surface and the second positioning surface have a preset included angle. The first positioning surface and the second positioning surface are connected by an arc transition. The elastic positioning component includes a main body and a first pin and a second pin extending outwardly from both sides of the main body. The opposite side walls of the receiving groove have a first through hole and a second through hole. The main body of the elastic positioning component is located outside the hinge cup and between the first through hole and the second through hole. The first pin extends into the receiving groove through the first through hole, and the second pin extends into the receiving groove through the second through hole, so that the elastic positioning component is dynamically connected to the hinge cup. When the hinge is in the unfolded state, the first pin elastically presses against the first positioning surface. When the hinge is in the folded state, the first pin elastically presses against the second positioning surface, so that the hinge remains in its current state without external force.