Improved structure of hydraulic buffer hinge

Abstract

An improved structure of a hydraulic buffer hinge comprises a hinge cup and a hinge arm, the hinge cup and the hinge arm are hinged through a first connecting rod and a second connecting rod, a buffer arm and a reset arm are arranged at the front end of the first connecting rod, a linkage plate is installed at the inner bottom of the hinge cup in a sliding mode, a damper is arranged between the linkage plate and the hinge cup, and the buffer arm is connected with the reset arm. The damper slows down the movement speed of the linkage plate; a buffer plate and a reset plate are arranged at the positions, corresponding to the buffer arm and the reset arm, of the linkage plate, and the buffer plate and the reset plate are used for being matched with the buffer arm and the reset arm. The hinge has the beneficial effects that the reset arm is arranged at the front end of the first connecting rod, the reset plate is arranged on the linkage plate, and when the hinge is opened, the reset arm is matched with the reset plate, the linkage plate is actively driven to move forwards, and reset is achieved. According to the active resetting mode of mechanical linkage, the resetting capacity of the linkage plate is greatly enhanced, and the defect that the self-resetting force of the damper is insufficient is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware hinges, in particular to an improved structure of a hydraulic buffer hinge. Background Art

[0002] Hydraulic buffer hinges are a common connector widely used in furniture, home appliances, industrial equipment and other fields. Their main function is to achieve smooth opening and closing of doors, provide buffering and shock absorption effects, and avoid collisions and noise.

[0003] Traditional hydraulic buffer hinges typically consist of a hinge cup, a hinge arm, a connecting rod, and a buffering damping mechanism mounted within the hinge cup. In the prior art, the damping mechanism often uses a hydraulic damper. When the hinge is closed, the connecting rod compresses the damper, achieving a cushioning effect. When the hinge opens or needs to be reset, the damper resets itself due to its inherent elasticity or internal structure.

[0004] However, existing hydraulic buffer hinges have some shortcomings in practical use, particularly regarding the reliability of the linkage plate's reset. Specifically, the linkage plate's reset often relies excessively on the damper's own self-reset force. This self-reset force is typically small, limited by factors such as the damper's internal spring strength, hydraulic oil viscosity, and seal friction.

[0005] This low self-reset force results in insufficient force when the linkage plate resets, which in turn affects the hinge's ability to fully open or reset in a timely manner, reducing reliability. In some cases, because the self-reset force is insufficient to overcome friction or external resistance during the sliding motion of the linkage plate, the linkage plate may even fail to reset, causing the hinge to malfunction. For example, the door may not remain fully open after opening, or the cushioning effect may be unstable during closing. Especially after long-term use, problems such as internal wear of the damper and aging of the hydraulic oil can further weaken its self-reset capability, increasing the risk of reset failure. Therefore, further improvements are necessary. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide an improved structure of a hydraulic buffer hinge which has a simple structure, is easy to use, and can effectively enhance the resetting ability of the linkage plate, thereby improving the overall reliability of the hydraulic buffer hinge.

[0007] The objectives of the present invention are achieved by the following means: an improved structure of a hydraulic buffer hinge, comprising a hinge cup and a hinge arm, wherein the hinge cup and the hinge arm are hingedly connected via a first connecting rod and a second connecting rod, wherein the hinge cup and the hinge arm rotate relative to the first connecting rod and the second connecting rod to realize the opening and closing of the hinge, wherein a buffer arm and a reset arm are provided at the front end of the first connecting rod, wherein the buffer arm and the reset arm swing around the hinge point between the first connecting rod and the hinge cup; A linkage plate is slidably mounted on the inner bottom of the hinge cup, and a damper is provided between the linkage plate and the hinge cup to slow down the movement of the linkage plate. A buffer plate and a reset plate are provided on the linkage plate at positions corresponding to the buffer arm and the reset arm, and the buffer plate and the reset plate are used to cooperate with the buffer arm and the reset arm; When the hinge is closed, the buffer arm cooperates with the buffer plate to drive the linkage plate to move backward, thereby achieving compression damping of the damper; When the hinge is opened, the reset arm cooperates with the reset plate to drive the linkage plate to move forward to achieve reset.

[0008] Furthermore: the buffer plate and the reset plate are flanges formed by bending the linkage plate body material upward.

[0009] Furthermore: a damping plate for connecting with the damper is provided on the linkage plate.

[0010] Furthermore, a guide groove is provided in the hinge cup, and the damping plate is slidably installed in the guide groove.

[0011] Furthermore, a pressure plate is installed in the hinge cup, and a space is left between the pressure plate and the inner bottom of the hinge cup to form an accommodating area, and the linkage plate slides in the accommodating area.

[0012] Furthermore, the reset arm includes a first reset arm and a second reset arm, which extend from the front end of the first connecting rod to the upper and lower sides thereof.

[0013] Furthermore, the first reset arm, the second reset arm and the first connecting rod are integrally formed from a metal plate.

[0014] Furthermore: the damper is a compression damping type self-resetting hydraulic cylinder.

[0015] The beneficial effects of the present invention are: 1. Simple structure, low production cost and improved market competitiveness.

[0016] 2. This invention incorporates a reset arm at the front end of the first connecting rod and a reset plate on the linkage plate. When the hinge opens, the reset arm and the reset plate cooperate to actively drive the linkage plate forward, achieving reset. This mechanically linked active reset greatly enhances the linkage plate's reset capability, overcoming the damper's inherently insufficient self-reset force. This ensures the linkage plate accurately and completely resets into position each time, thus maintaining the continued effectiveness of the hinge's buffering function.

[0017] 3. In this case, the reset arm comprises a first reset arm and a second reset arm, extending from the front end of the first connecting rod to its upper and lower sides. This design allows the first and second reset arms to engage with the reset plate in stages or in a more stable manner during the hinge opening process, creating a similar "two-stage reset" effect. This further improves the smoothness and reliability of the reset and effectively prevents the linkage plate from getting stuck or out of position.

[0018] 4. The buffer arm and reset arm are located at the front end of the first link, tightly integrated with the hinge's core moving parts, resulting in a compact structure. Furthermore, the linkage plate, buffer plate, reset plate, and damper are cleverly integrated within the hinge cup, sliding within a sliding area formed by a pressure plate. This maximizes internal space utilization and facilitates installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a rendering of the hinge in the open state in the present invention.

[0020] Figure 2 This is a rendering of the hinge in the closed state in the present invention.

[0021] Figure 3 It is a cross-sectional view of the structure of the present invention.

[0022] Figure 4 、 5 This is a structural decomposition diagram of the present invention.

[0023] Figure 6 、 Figure 7 、 Figure 8 This is a schematic diagram of the action of the buffer arm pushing the buffer plate during the hinge closing process of the present invention.

[0024] Figure 9 、 Figure 10 、 Figure 11 This is a schematic diagram of the reset arm pushing the reset plate during the hinge opening process of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings. An improved structure of a hydraulic buffer hinge comprises a hinge cup 1 and a hinge arm 2. The hinge cup 1 and the hinge arm 2 are hingedly connected via a first connecting rod 3 and a second connecting rod 4. The hinge arm 2 rotates relative to the first connecting rod 3 and the second connecting rod 4 to open and close the hinge. A buffer arm 5 and a reset arm 6 are provided at the front end of the first connecting rod 3. The buffer arm 5 and the reset arm 6 are driven by the first connecting rod 3 to swing around the hinge point between the first connecting rod 3 and the hinge cup 1. A linkage plate 7 is slidably installed on the inner bottom of the hinge cup 1. A linkage plate 7 is provided between the linkage plate 7 and the hinge cup 1. There is a damper 8, which slows down the movement speed of the linkage plate 7; a buffer plate 71 and a reset plate 72 are provided on the linkage plate 7 corresponding to the positions of the buffer arm 5 and the reset arm 6, and the buffer plate 71 and the reset plate 72 are used to cooperate with the buffer arm 5 and the reset arm 6; when the hinge is closed, the buffer arm 5 cooperates with the buffer plate 71 to drive the linkage plate 7 to move backward, thereby realizing the compression damping of the damper 8; when the hinge is opened, the reset arm 6 cooperates with the reset plate 72 to drive the linkage plate 7 to move forward, thereby realizing reset.

[0026] In this embodiment, when the hinge is opened and closed, the hinge arm 2 rotates relative to the first link 3 and the second link 4. This rotation causes the first link 3 to swing, which in turn drives the buffer arm 5 and the reset arm 6 at its front end to swing around the hinge point between the first link and the hinge cup.

[0027] At the final stage of hinge closing, the buffer arm 5 contacts and engages the buffer plate 71 on the linkage plate 7. As the hinge continues to close, the buffer arm 5 drives the linkage plate 7 to slide backward. Because a damper 8 is connected between the linkage plate 7 and the hinge cup 1, the backward movement of the linkage plate 7 compresses the damper 8, creating a compression damping effect, slowing the hinge closing speed and preventing the door leaf from violently slamming.

[0028] When the hinge is opened, the reverse swing of the first connecting rod 3 causes the reset arm 6 to contact and cooperate with the reset plate 72 on the linkage plate 7. At this time, the reset arm 6 will actively drive the linkage plate 7 to slide forward. This active reset is one of the key technical advantages of the present invention. It overcomes the shortcomings of the prior art that rely solely on the insufficient self-reset force of the damper. While the linkage plate 7 moves forward, it also ensures that the damper 8 is fully reset, preparing for the next buffering action. This mechanical linkage forced reset greatly improves the reliability of the linkage plate reset and ensures the continued effectiveness and stability of the hinge buffering function.

[0029] In one embodiment, the buffer plate 71 and the reset plate 72 are flanges formed by bending the main material of the linkage plate 7 upward.

[0030] In this embodiment, by bending the main body of the linkage plate 7 upward to form a flange, the functions of the buffer plate and reset plate are achieved while simplifying the manufacturing process. This one-piece design reduces the number of parts and assembly steps, improving production efficiency. Furthermore, the flange structure provides sufficient strength and contact area, ensuring that the buffer arm 5 and reset arm 6 can effectively transmit driving force when they cooperate, thereby stably achieving buffering and reset of the linkage plate.

[0031] In one embodiment, the linkage plate 7 is provided with a damping plate 73 for connecting to the damper 8. Specifically, the damping plate 73, as a specific component of the linkage plate 7, operates by acting as a connecting medium, securely securing or connecting the damper 8 to the linkage plate 7. Thus, when the linkage plate 7 is driven to slide by the buffer arm 5 or the reset arm 6, the damping plate 73 ensures that the damper 8 undergoes synchronous compression or reset motion, thereby achieving its damping and reset functions. This design ensures more stable and reliable force transmission between the linkage plate and the damper.

[0032] In one embodiment, the hinge cup 1 is provided with a guide groove 11, within which a damping plate 73 is slidably mounted. The guide groove 11 provided within the hinge cup 1 provides a precise sliding path for the damping plate 73 connected to the linkage plate 7. As the linkage plate 7 moves back and forth within the hinge cup 1, the sliding of the damping plate 73 within the guide groove 11 effectively limits lateral displacement of the linkage plate 7, ensuring smooth linear motion along a predetermined direction. This guide mechanism prevents the linkage plate from becoming stuck or deviating during sliding, thereby ensuring smooth and stable operation of the buffer and reset mechanisms.

[0033] In one embodiment, the hinge cup 1 is further covered with a pressure plate 9 , and a space is left between the pressure plate 9 and the inner bottom of the hinge cup 1 to form an accommodating area 91 , and the linkage plate 7 slides in the accommodating area 91 .

[0034] In this embodiment, the pressure plate 9 is installed within the hinge cup 1 to form a specific accommodation area 91. The linkage plate 7 is strategically positioned and constrained to slide within this accommodation area 91. This design not only effectively secures the longitudinal position of the linkage plate 7, preventing it from dislodging from the hinge cup, but also provides a closed and protected sliding environment for the linkage plate. Furthermore, the presence of the pressure plate may help to compress the damper or other internal components, making the entire mechanism more compact and stable, thereby enhancing the overall structural strength and reliability of the hinge.

[0035] In one embodiment, the reset arm 6 includes a first reset arm 61 and a second reset arm 62 , which extend from the front end of the first connecting rod 3 to the upper and lower sides thereof.

[0036] In this embodiment, the single reset arm 6 is split into a first reset arm 61 and a second reset arm 62. This design enables the reset arm 6 to contact and engage with the reset plate 72 at two or more points when the hinge opens and drives the linkage plate to reset. This "two-stage reset" operating mode provides a more stable and uniform driving force during the linkage plate reset process, especially when the reset stroke is long or a greater reset force is required. By distributing the applied force, wear or uneven force that may be caused by a single contact point can be effectively avoided, thereby further improving the smoothness and reliability of the linkage plate reset and the durability of the mechanism.

[0037] In one embodiment, the first reset arm 61 and the second reset arm 62 are integrally formed with the first connecting rod 3 from sheet metal. By integrally forming these components from sheet metal, rather than assembling them through welding or riveting, this one-piece molding process significantly improves the overall strength and rigidity of the components, avoiding stress concentration and failure risks at the joints. It also simplifies the production process, reduces manufacturing costs and errors, and improves product efficiency and consistency. More importantly, this one-piece molding ensures more direct and efficient force transmission from the reset arm when driving the linkage plate to reset, further enhancing the reliability of the reset mechanism.

[0038] In one embodiment, the damper 8 is a compression damping self-resetting hydraulic cylinder.

[0039] When a compression-damping self-resetting hydraulic cylinder is subjected to external pressure (i.e., the push of the linkage plate), its internal piston compresses the hydraulic oil, achieving a damping effect through the flow resistance of the oil. When the external pressure is removed (i.e., the linkage plate is reset), the spring or other energy storage element within the hydraulic cylinder pushes the piston back, achieving its own reset. The advantage of choosing this type of damper is that it provides controllable buffering resistance. Even with a relatively low self-resetting force, the linkage plate can be fully reset through the drive of the reset arm under the active reset mechanism of the present invention. It effectively cooperates with the active reset mechanism of the present invention to ensure the coordinated operation of the hinge's buffering and reset functions.

[0040] In summary, the core working principle of the present invention is to achieve buffering and active resetting functions through mechanical linkage during hinge opening and closing.

[0041] Specifically, during the hinge closing process, the rotation of the hinge arm drives the first connecting rod to swing, causing the buffer arm 5 to contact the buffer plate 71 on the linkage plate 7, driving the linkage plate 7 to slide backward. The backward movement of the linkage plate 7 compresses the damper 8. The oil flow resistance of the damper achieves a smooth buffering effect, effectively reducing the impact and noise of the door leaf.

[0042] The main difference and significant advancement over existing technologies lies in its active reset mechanism. When the hinge opens, the reverse swing of the first link 3 causes the reset arm 6 to contact the reset plate 72 on the linkage plate 7, directly driving the linkage plate 7 forward, thus achieving reliable reset. This mechanically driven reset method completely solves the problem of the linkage plate not being able to reset properly or even fail due to the traditional damper's weak self-reset force, greatly improving the hinge's reliability and service life.

[0043] In addition, the present invention further improves the manufacturing efficiency, structural strength and stability of the reset work of the product by designing the buffer plate 71 and the reset plate 72 as the flanges of the linkage plate body, and the reset arm 6 can be disassembled into the first reset arm 61 and the second reset arm 62 and integrally formed with the first connecting rod 3. It can even achieve two-stage reset, ensuring that the linkage plate can be accurately and thoroughly reset regardless of the usage environment, so it can be widely promoted and used.

[0044] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. An improved structure of a hydraulic buffer hinge, comprising a hinge cup (1) and a hinge arm (2), wherein the hinge cup (1) and the hinge arm (2) are hingedly connected via a first connecting rod (3) and a second connecting rod (4), and the hinge cup and the hinge arm (2) rotate relative to the first connecting rod (3) and the second connecting rod (4) to realize the opening and closing of the hinge, characterized in that: A buffer arm (5) and a reset arm (6) are provided at the front end of the first connecting rod (3), and the buffer arm (5) and the reset arm (6) swing around the hinge point between the first connecting rod (3) and the hinge cup (1); A linkage plate (7) is slidably mounted on the inner bottom of the hinge cup (1), and a damper (8) is provided between the linkage plate (7) and the hinge cup (1), wherein the damper (8) slows down the movement speed of the linkage plate (7); A buffer plate (71) and a reset plate (72) are provided on the linkage plate (7) at positions corresponding to the buffer arm (5) and the reset arm (6), and the buffer plate (71) and the reset plate (72) are used to cooperate with the buffer arm (5) and the reset arm (6); When the hinge is closed, the buffer arm (5) cooperates with the buffer plate (71) to drive the linkage plate (7) to move backward, thereby achieving compression damping of the damper (8); When the hinge is opened, the reset arm (6) cooperates with the reset plate (72) to drive the linkage plate (7) to move forward, thereby achieving reset.

2. The improved structure of the hydraulic buffer hinge according to claim 1, characterized in that: The buffer plate (71) and the reset plate (72) are flanges formed by bending the main body material of the linkage plate (7) upward.

3. The improved structure of the hydraulic buffer hinge according to claim 1, characterized in that: The linkage plate (7) is provided with a damping plate (73) for connecting to the damper (8).

4. The improved structure of the hydraulic buffer hinge according to claim 1, characterized in that: A guide groove (11) is provided in the hinge cup (1), and the damping plate (73) is slidably mounted in the guide groove (11).

5. The improved structure of the hydraulic buffer hinge according to claim 1, characterized in that: The hinge cup (1) is also covered with a pressure plate (9), and a space is left between the pressure plate (9) and the inner bottom of the hinge cup (1) to form an accommodation area (91), and the linkage plate (7) is located in the accommodation area (91) and slides.

6. The improved structure of the hydraulic buffer hinge according to claim 1, characterized in that: The reset arm (6) comprises a first reset arm (61) and a second reset arm (62), which extend from the front end of the first connecting rod (3) to the upper and lower sides thereof.

7. The improved structure of the hydraulic buffer hinge according to claim 6, characterized in that: The first reset arm (61), the second reset arm (62) and the first connecting rod (3) are integrally formed from a metal plate.

8. The improved structure of the hydraulic buffer hinge according to claim 1, characterized in that: The damper (8) is a compression damping type self-resetting hydraulic cylinder.

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