Hydraulic buffering hinge

Abstract

A hydraulic buffering hinge comprises a hinge cup, an upper connecting rod and a lower connecting rod are installed on the hinge cup in a hinged mode, the other end of the upper connecting rod and the other end of the lower connecting rod are hinged to a hinge arm, a spring is arranged between the upper connecting rod and the hinge arm, the tail of the lower connecting rod extends backwards to form a linkage block, a containing cavity is formed in the hinge arm, a damper is installed in the containing cavity, and the damper is connected with the hinge arm. The damper is connected with the linkage block through the pull arm, when the hinge is closed, the linkage block pushes the damper to move through the pull arm, and the damping effect is achieved when the hinge is closed. The hinge structure has the advantages that the problem of stress concentration caused by a limited contact area between a hinge hole and a hinge shaft in a traditional hinge structure is solved by improving the connection mode between the pull arm and the linkage block. The novel design effectively increases the contact area between parts, can disperse stress generated in the opening and closing process, reduces local abrasion, and prolongs the service life of the hinge.

Description

Technical Field

[0001] The utility model relates to a hinge, in particular to a hydraulic buffer hinge. Background Art

[0002] Hardware hinges, as key components connecting cabinet doors and cabinet bodies, are widely used in furniture, doors, and windows. In modern furniture, doors, and windows, hinges are not only used for opening and closing but also require a certain cushioning effect to prevent impact on the door, cabinet body, or users during rapid closing. Therefore, hydraulic hinges with cushioning functions are gradually becoming a mainstream product in the market.

[0003] The hydraulic buffer hinge can provide a buffering and deceleration effect during the closing process of the cabinet door through the built-in hydraulic damping device, thereby achieving a smooth and controllable opening and closing process. This design can effectively avoid the impact sound and impact force caused by the rapid closing of the cabinet door, and has a significant effect on improving the overall quality and user experience of furniture products. In the prior art, the structural design of the hydraulic buffer hinge is diverse, among which the common technical solution is usually to connect the damper to the lower connecting rod to achieve the buffering function. For example, the hydraulic buffer hinges disclosed in Chinese patent numbers: 2015207027842, 2011201225080 and 2016211894445 mainly adopt a structural design in which the damper is connected to the lower connecting rod through a pull rod.

[0004] However, although these existing technical solutions have achieved the buffering function to a certain extent, they still have some shortcomings that cannot be ignored in practical applications, which are specifically reflected in the following aspects:

[0005] 1. In existing structures, the contact area between the hinge hole and the hinge shaft is small, typically concentrated in only a portion of the circumference. This limited contact area causes contact stress to be concentrated in a localized area during the opening and closing process, which can easily lead to localized stress concentration and increased wear. This not only shortens the hinge's service life but can also cause functional failure or reduce its cushioning effectiveness over time.

[0006] 2. With long-term use, the contact surface between the hinge hole and the hinge shaft gradually wears, causing the existing clearance to widen. This increased clearance exacerbates hinge wobble. Simultaneously, due to the instability of the hinge structure, the cushioning effect gradually decreases, making it impossible to achieve smooth cushioning at small angles. This wear process not only shortens the hinge's service life but also negatively impacts the user experience. This is especially true in applications requiring precise control of slow closing, such as high-end furniture or precision doors and windows. This increased clearance severely impacts the product's aesthetics and sealing. Therefore, further improvements are necessary. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a hydraulic buffer hinge with a simple structure, easy use and the ability to effectively extend the service life of the hinge.

[0008] The purpose of the utility model is achieved in the following way: a hydraulic buffer hinge, which includes a hinge cup, an upper connecting rod and a lower connecting rod are hingedly installed on the hinge cup, the other ends of the upper connecting rod and the lower connecting rod are hinged to the hinge arm, a spring is provided between the upper connecting rod and the hinge arm, the upper connecting rod and the lower connecting rod swing relative to the hinge cup and the hinge arm to realize the opening and closing of the hinge, a linkage block is extended backward from the tail of the lower connecting rod, an accommodating chamber is provided in the hinge arm, a damper is installed in the accommodating chamber, the damper is connected to the linkage block through a pulling arm, when the hinge is closed, the linkage block pushes the damper to move through the pulling arm, thereby realizing the damping effect when the hinge is closed.

[0009] Furthermore: the linkage block is a boss protruding from the tail of the lower connecting rod, the top of the boss is provided with a hanging groove, the front end of the pull arm is provided with a front hanging plate hooked in the hanging groove; the rear end of the pull arm is provided with a rear hanging plate, and the rear hanging plate is connected to the damper.

[0010] Furthermore, the damper is a compression damping type hydraulic damper, the rear hanging plate is hooked on the piston rod of the damper, and the cylinder part of the damper is fixedly connected to the hinge arm.

[0011] Furthermore, a guide sleeve is fixedly installed in the accommodating cavity, the damper is installed in the guide sleeve, a guide groove is provided in the guide sleeve, and the pulling arm is slidably installed in the guide groove.

[0012] Furthermore, the pulling arm is made of a metal plate, and a clearance area is provided on the pulling arm corresponding to the position of the linkage block.

[0013] Furthermore, the pull arm is also stamped with reinforcing ribs.

[0014] Furthermore: the linkage block is connected to a hinge shaft, and the pull arm is connected to the hinge shaft.

[0015] The beneficial effects of the utility model are:

[0016] 1. Simple structure, low production cost and improved market competitiveness.

[0017] 2. By setting up a connection structure between the damper and the linkage block, when the hinge is closed, the linkage block pushes the damper through the pull arm, achieving an effective buffering effect on the hinge.

[0018] 3. By improving the connection between the pull arm and linkage block, the stress concentration problem caused by the limited contact area between the hinge hole and the hinge shaft in traditional hinge structures is avoided. The new design effectively increases the contact area between the components, dissipating the stress generated during opening and closing, reducing localized wear and extending the hinge's service life. Furthermore, the gap expansion caused by localized wear is avoided, thereby maintaining the hinge's stable performance over time.

[0019] 4. The utility model adopts a design in which the linkage block and the pull arm are interlocked, which not only makes the hinge structure more compact but also facilitates production and assembly. This connection method can reduce complex assembly processes and improve production efficiency.

[0020] 5. The arm is constructed of sheet metal and features a clearing zone and reinforcing ribs. This design enhances its strength and rigidity, increasing its resistance to bending and deformation, and further extending the hinge's durability and service life. Furthermore, the use of metal ensures the hinge maintains its excellent mechanical properties even under frequent use, reducing the risk of failure due to deformation or wear over time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the hinge in the open state of the present invention.

[0022] Figure 2 This is a cross-sectional view of the structure of the hinge in the open state in the utility model.

[0023] Figure 3 This is a schematic diagram of the hinge closed state in the present invention.

[0024] Figure 4 This is a cross-sectional view of the hinge structure in the closed state in the present invention.

[0025] Figure 5 This is a cross-sectional view of the structure of the utility model.

[0026] Figure 6 This is a structural exploded view of the utility model.

[0027] Figure 7 This is a structural diagram of the second embodiment of the linkage block in the utility model.

[0028] Figure 8 This is a schematic diagram of the pull arm structure of the utility model. DETAILED DESCRIPTION

[0029] The present invention is further described below in detail with reference to the accompanying drawings. A hydraulic buffer hinge comprises a hinge cup 1, an upper connecting rod 2 and a lower connecting rod 3 being hingedly mounted on the hinge cup 1, the other ends of the upper connecting rod 2 and the lower connecting rod 3 being hingedly connected to a hinge arm 9, a spring 4 being provided between the upper connecting rod and the hinge arm 9, the upper connecting rod 2 and the lower connecting rod 3 swinging relative to the hinge cup 1 and the hinge arm 9 to achieve the opening and closing of the hinge, a linkage block 5 extending rearward from the tail of the lower connecting rod 3, a receiving chamber 6 being provided within the hinge arm 9, a damper 7 being installed within the receiving chamber 6, the damper 7 being connected to the linkage block 5 via a pull arm 8, and when the hinge is closed, the linkage block 5 pushes the damper 7 to move via the pull arm 8, thereby achieving a damping effect when the hinge is closed.

[0030] In one embodiment, the linkage block 5 is a boss protruding from the tail of the lower connecting rod 3, a hanging groove 51 is provided on the top of the boss, and a front hanging plate 81 is provided at the front end of the pulling arm 8 to be hooked in the hanging groove 51; a rear hanging plate 82 is provided at the rear end of the pulling arm 8, and the rear hanging plate 82 is connected to the damper 7.

[0031] In one embodiment, the damper 7 is a compression damping type hydraulic damper, the rear hanging plate 82 is hooked on the piston rod of the damper 7, and the cylinder part of the damper 7 is fixedly connected to the hinge arm.

[0032] In one embodiment, a guide sleeve 10 is fixedly installed in the accommodating chamber 6 , the damper 7 is installed in the guide sleeve 10 , a guide groove 11 is provided in the guide sleeve 10 , and the pulling arm 8 is slidably installed in the guide groove 11 .

[0033] In one embodiment, the pulling arm 8 is made of a metal plate, and a clearance area 83 is provided on the pulling arm 8 at a position corresponding to the linkage block 5 .

[0034] In one embodiment, a reinforcing rib 84 is further stamped on the pull arm 8 .

[0035] In one embodiment, the linkage block 5 is connected to a hinge shaft 52 , and the pull arm 8 is connected to the hinge shaft.

[0036] Working Principle: In this hinge structure, the hinge cup 1 and hinge arm 9 are hingedly connected by the upper link 2 and lower link 3. The hinge opens and closes by swinging the upper and lower links. When the hinge opens, the upper and lower links rotate about their hinge points, moving the hinge arm away from the hinge cup, opening the door; conversely, when the door closes, the hinge arm moves away from the hinge cup.

[0037] When the hinge closes, the lower link drives the linkage block upward, pulling the damper's piston rod through the pull arm, causing the oil in the damper to flow, creating a hydraulic damping effect. This damping action slows the hinge's closing speed, providing a smooth, slow-closing function and avoiding the impact and noise caused by rapid door closing.

[0038] It should be noted that: Figure 1-6 As shown, the front end of the pull arm 8 is connected to the hanging slot 51 of the linkage block 5 via a front hanging plate 81, and the rear end is connected to the piston rod of the damper 7 via a rear hanging plate 82. When the hinge is closed, the linkage block pushes the pull arm, which in turn drives the damper. The large contact area between the hanging slot 51 and the front hanging plate 81 disperses the stress generated during opening and closing, reducing localized wear and extending the hinge's service life. Furthermore, the problem of gap expansion caused by localized wear is avoided, maintaining the hinge's stable performance over time.

[0039] Similarly, if Figure 7 As shown, the linkage block 5 is connected to a hinge shaft 52, to which the pull arm 8 is attached. Specifically, the linkage block is a hinged seat located at the rear end of the lower link, with the hinge shaft mounted transversely within the seat. The front hanging plate at the front end of the pull arm is directly hooked onto the hinge shaft and fixedly connected thereto. Similarly, the large contact area between the hinge shaft and the front hanging plate disperses the stress generated during opening and closing, reducing localized wear and extending the hinge's service life.

[0040] Furthermore, the housing 6 in this embodiment is equipped with a guide sleeve 10 and a guide groove 11, allowing the arm to slide smoothly within the guide groove when closing, ensuring smoother and more precise relative movement between the arm and the damper. This design effectively prevents deviation during arm movement and improves the operational stability of the hinge. Furthermore, the housing also serves to secure the damper, allowing the thrust applied to the damper during operation to be transmitted to the hinge arm via the guide sleeve, ensuring uniform force distribution and stable operation.

[0041] In summary, the hook structure of the linkage block 5 and the pull arm 8 is adopted in this case, which effectively increases the contact area between the pull arm and the linkage block, reduces stress concentration and local wear, and thus improves the stability and durability of the hinge, so it can be widely promoted and used.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. 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 improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A hydraulic buffer hinge, comprising a hinge cup (1), an upper connecting rod (2) and a lower connecting rod (3) being hingedly mounted on the hinge cup (1), the other ends of the upper connecting rod (2) and the lower connecting rod (3) being hingedly connected to a hinge arm (9), a spring (4) being provided between the upper connecting rod and the hinge arm (9), the upper connecting rod (2) and the lower connecting rod (3) swinging relative to the hinge cup (1) and the hinge arm (9) to realize the opening and closing of the hinge, characterized in that: A linkage block (5) is extended backward from the tail of the lower connecting rod (3), and a receiving chamber (6) is provided in the hinge arm (9). A damper (7) is installed in the receiving chamber (6). The damper (7) is connected to the linkage block (5) through the pulling arm (8). When the hinge is closed, the linkage block (5) pushes the damper (7) to move through the pulling arm (8), thereby achieving a damping effect when the hinge is closed.

2. The hydraulic buffer hinge according to claim 1, characterized in that: The linkage block (5) is a boss protruding from the tail of the lower connecting rod (3), a hanging groove (51) is provided on the top of the boss, and a front hanging plate (81) is provided at the front end of the pulling arm (8) and is hooked in the hanging groove (51); a rear hanging plate (82) is provided at the rear end of the pulling arm (8), and the rear hanging plate (82) is connected to the damper (7).

3. The hydraulic buffer hinge according to claim 2, characterized in that: The damper (7) is a compression damping type hydraulic damper, the rear hanging plate (82) is hooked on the piston rod of the damper (7), and the cylinder part of the damper (7) is fixedly connected to the hinge arm.

4. The hydraulic buffer hinge according to claim 1, characterized in that: A guide sleeve (10) is fixedly installed in the accommodating chamber (6), the damper (7) is installed in the guide sleeve (10), and a guide groove (11) is provided in the guide sleeve (10), and the pulling arm (8) is slidably installed in the guide groove (11).

5. A hydraulic buffer hinge according to any one of claims 1 to 4, characterized in that: The pulling arm (8) is made of a metal plate, and a clearance area (83) is provided on the pulling arm (8) at a position corresponding to the linkage block (5).

6. The hydraulic buffer hinge according to claim 5, characterized in that: The pull arm (8) is also provided with a reinforcing rib (84) by stamping.

7. The hydraulic buffer hinge according to claim 1, characterized in that: The linkage block (5) is connected to a hinge shaft (52), and the pull arm (8) is connected to the hinge shaft.

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