Compact hydraulic buffer hinge

Abstract

A compact hydraulic buffering hinge comprises a hinge cup and a hinge arm, the hinge cup and the hinge arm are hinged through an upper connecting rod and a lower connecting rod, a containing cavity is formed in the hinge arm, a damping sleeve is fixed in the containing cavity, a damping hole is obliquely formed in the damping sleeve, and a cylinder body part of a hydraulic cylinder is installed in the damping hole in a sliding mode. A connecting seat is arranged at the tail part of the lower connecting rod and is connected with a cylinder body part of a hydraulic cylinder, a piston rod of the hydraulic cylinder is connected with the hinge arm, and when the hinge is opened and closed, the connecting seat drives the cylinder body part to slide in the accommodating cavity so as to realize a damping effect when the hinge is closed. The utility model has the beneficial effects that a unique hydraulic cylinder inclined arrangement design is adopted, and the cylinder body part of the hydraulic cylinder is arranged in the hinge arm at a certain inclined angle through the damping hole. By means of the design, the occupied space of the hydraulic cylinder in the hinge arm is greatly reduced, the hydraulic cylinder and the hinge arm are not arranged in parallel any more, and therefore the inner space of the hinge arm is released.

Description

Technical Field

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

[0002] With the development of the furniture industry, modern furniture is increasingly pursuing aesthetics and practicality. This is particularly true for cabinet door opening and closing systems. Hydraulic buffer hinges, which effectively control door closing speed and prevent collisions, have gradually become a mainstream choice in the market. These hinges utilize hydraulic damping devices to provide a cushioning effect, ensuring smoother and quieter closing. However, existing hydraulic buffer hinges still have some structural design deficiencies, particularly in the layout of the hydraulic cylinder and space utilization, which require urgent improvement.

[0003] Hydraulic buffer hinges in the prior art generally adopt a four-bar structure, in which the hydraulic cylinder is usually arranged parallel to the hinge arm. As the main buffer component, the length of the hydraulic cylinder directly determines the overall structural dimensions of the hinge. Since the hydraulic cylinder is arranged parallel to the hinge arm, it occupies a longer space inside the hinge arm, which not only causes the hinge to become larger in size, but also greatly limits the layout and connection of other components in the hinge arm. For example, in order to accommodate the hydraulic cylinder in a limited space, the structure of the hinge arm usually needs to be specially designed, which increases the complexity and cost of manufacturing. In addition, when the hydraulic cylinder is arranged parallel to the hinge arm, its fixing and connection parts are also prone to additional stress, affecting the durability and service life of the hinge.

[0004] More importantly, because the hydraulic cylinder occupies most of the space within the hinge arm, the installation and placement of other functional components, such as the quick-release mechanism and positioning device, are restricted, making a compact structural design difficult. In existing technologies, the inefficient use of internal hinge space makes it difficult for designers to adopt hydraulic buffer hinges for small, delicate furniture, limiting their popularity in specific application scenarios.

[0005] Therefore, how to optimize the utilization of the internal space of the hinge and reduce the space occupied by the hydraulic cylinder on the hinge arm while ensuring the hydraulic buffering effect has become an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a compact hydraulic buffer hinge with a simple structure and easy use. By optimizing the layout and connection method of the hydraulic cylinder, the utilization rate of the internal space of the hinge is effectively improved while maintaining the buffering effect, thereby meeting the needs of miniaturization and compactness of modern furniture.

[0007] The purpose of the utility model is achieved in the following manner: a compact hydraulic buffer hinge, which includes a hinge cup and a hinge arm, wherein the hinge cup and the hinge arm are hingedly connected by an upper connecting rod and a lower connecting rod; the hinge cup, the hinge arm, the upper connecting rod and the lower connecting rod form a four-link structure, a torsion spring is provided between the hinge arm and the lower connecting rod, and the torsion spring drives the lower connecting rod to always swing in the closing direction; the hinge arm is an open groove-shaped structure with an open lower end, and an accommodating cavity is formed in the hinge arm, a damping sleeve is fixed in the accommodating cavity, a damping hole is obliquely opened in the damping sleeve, and the cylinder body of the hydraulic cylinder is slidably installed in the damping hole;

[0008] The tail of the lower connecting rod is provided with a connecting seat, which is connected to the cylinder body of the hydraulic cylinder. The piston rod of the hydraulic cylinder is connected to the hinge arm. When the hinge is opened and closed, the connecting seat drives the cylinder body to slide in the accommodating cavity to achieve a damping effect when the hinge is closed.

[0009] Furthermore, the inclination angle between the damping hole and the main body of the hinge arm is set at 30° to 60°.

[0010] Furthermore, the damping hole is arranged in an inclined direction with one side facing the hinge cup being higher and the other side being lower.

[0011] Furthermore, a first mounting hole and a second mounting hole are transversely arranged on the damping sleeve, and the first mounting hole and the second mounting hole are fixed on the first pin shaft and the second pin shaft located on the hinge arm.

[0012] Furthermore: a third pin is provided on the lower connecting rod, and the torsion spring is carried on the third pin.

[0013] Furthermore: a buckle is provided on the connecting seat, and correspondingly, a driving plate is sleeved on the surface of the cylinder body, and the driving plate extends into the buckle and is connected thereto.

[0014] Furthermore: guide grooves are provided on both sides of the damping sleeve, and the driving plate passes through the guide grooves and is connected to the connecting seat.

[0015] Furthermore, a baffle is installed on the top of the damping sleeve, and a positioning plate is provided at the front end of the baffle, and the piston rod of the damper is pressed against the positioning plate and fixed.

[0016] Furthermore: a clamping plate is provided at the rear end of the baffle, and correspondingly, a positioning groove is provided on the damping sleeve, and the clamping plate is clamped and fixed in the positioning groove.

[0017] Furthermore: a locking groove is also provided on the baffle, a positioning platform is extended upward from the top of the damping sleeve, the baffle is covered and installed on the top of the damping sleeve, and the positioning platform is extended into the locking groove and fixed.

[0018] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0019] 2. This utility model utilizes a unique, diagonal hydraulic cylinder design. The cylinder body is installed inside the hinge arm at a predetermined angle through a damping hole. This design significantly reduces the space occupied by the hydraulic cylinder within the hinge arm, eliminating the need for the hydraulic cylinder to be parallel to the hinge arm, thereby freeing up space within the hinge arm. This improvement not only makes the hinge structure more compact, but also provides more space for the installation and arrangement of other components, effectively improving the hinge's overall performance and space utilization.

[0020] 3. By installing a damping sleeve inside the hinge arm and forming a damping hole within it, the hydraulic cylinder body can slide stably, ensuring smooth damping during the hinge opening and closing process. In addition, the diagonal arrangement of the hydraulic cylinder effectively disperses force transmission, reducing the additional stress caused by the parallel layout, and improving the durability and long-term stability of the hinge. 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 schematic diagram of the hinge closed state in the present invention.

[0023] Figure 3 This is a cross-sectional view of the structure of the hinge in the open state in the utility model.

[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 structural exploded view of the utility model.

[0026] Figure 6 This is a diagram showing the assembly of the upper connecting rod, lower connecting rod and damping set in the utility model.

[0027] Figure 7 This is the general assembly drawing of the upper connecting rod, lower connecting rod and damping sleeve in the utility model.

[0028] Figure 8 This is a diagram showing the assembly of the middle baffle and damping set of the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described below in detail with reference to the accompanying drawings. A compact hydraulic buffer hinge comprises a hinge cup 1 and a hinge arm 2, which are hingedly connected to each other via an upper connecting rod 3 and a lower connecting rod 4. The hinge cup 1, hinge arm 2, upper connecting rod 3, and lower connecting rod 4 form a four-bar linkage structure. A torsion spring 5 is disposed between the hinge arm 2 and the lower connecting rod 4, which drives the lower connecting rod 4 to always swing in the closing direction. The hinge arm 2 is an open slot-shaped structure with an open lower end, forming an accommodating chamber 21 within the hinge arm 2. A damping sleeve 6 is fixed within the accommodating chamber 21, and a damping hole 61 is obliquely disposed within the damping sleeve 6. The cylinder body 71 of the hydraulic cylinder 7 is slidably mounted within the damping hole 61.

[0030] The tail of the lower connecting rod 4 is provided with a connecting seat 41, which is connected to the cylinder body part 71 of the hydraulic cylinder 7, and the piston rod 72 of the hydraulic cylinder 7 is connected to the hinge arm 2. When the hinge is opened and closed, the connecting seat 41 drives the cylinder body part 71 to slide in the accommodating chamber 21, thereby realizing a damping effect when the hinge is closed.

[0031] In one embodiment, the inclination angle between the damping hole 61 and the main body of the hinge arm 2 is set at 30° to 60°.

[0032] In one embodiment, the damping hole 61 is arranged in an inclined direction with one side facing the hinge cup 1 being higher and the other side being lower.

[0033] In one embodiment, a first mounting hole 62 and a second mounting hole 63 are transversely provided on the damping sleeve 6 , and the first mounting hole 62 and the second mounting hole 63 are fixed on a first pin 64 and a second pin 65 located on the hinge arm 2 .

[0034] In one embodiment, the lower connecting rod 4 is further provided with a third pin 66 , and the torsion spring 5 is supported on the third pin 66 .

[0035] In one embodiment, a buckle 42 is provided on the connecting seat 41 , and correspondingly, a driving plate 73 is sleeved on the surface of the cylinder portion 71 , and the driving plate 73 extends into the buckle 42 and is connected thereto.

[0036] In one embodiment, guide grooves 67 are provided on both sides of the damping sleeve 6 , and the driving plate 73 passes through the guide grooves 67 and is connected to the connecting seat 41 .

[0037] In one embodiment, a baffle 8 is further installed on the top of the damping sleeve 6 , and a positioning plate 81 is provided at the front end of the baffle 8 , and the piston rod 72 of the damper is pressed against the positioning plate 81 and fixed.

[0038] In one embodiment, a clamping plate 82 is provided at the rear end of the baffle 8 , and correspondingly, a positioning groove 68 is provided on the damping sleeve 6 , and the clamping plate 82 is clamped and fixed in the positioning groove 68 .

[0039] In one embodiment, a locking groove 83 is further provided on the baffle 8 , a positioning platform 69 extends upward from the top of the damping sleeve 6 , the baffle 8 is covered and installed on the top of the damping sleeve 6 , and the positioning platform 69 extends into the locking groove 83 and is fixed.

[0040] Working Principle: In this case, the hinge cup is fixed to the cabinet body, while the hinge arm is connected to the cabinet door. The hinge cup and hinge arm are articulated via an upper link and a lower link, forming a four-bar linkage. A torsion spring is installed between the lower link and the hinge arm. This spring provides a continuous closing force, keeping the lower link in the closing direction, thereby driving the cabinet door to close automatically.

[0041] The key technology of this utility model lies in the unique arrangement of the hydraulic cylinder. The cylinder body of the hydraulic cylinder is slidably mounted within a damping sleeve within the hinge arm via an obliquely arranged damping hole. The piston rod of the hydraulic cylinder is connected to the hinge arm, while the cylinder body is connected to the connecting seat at the rear end of the lower connecting rod.

[0042] When the hinge is open, the lower link is compressed by the torsion spring, and the hydraulic cylinder, driven by the connector, slides relative to the bottom of the damping hole. When the door begins to close, the torsion spring drives the lower link to swing in the closing direction, causing the connector to move with it, driving the hydraulic cylinder's body to slide upward along the damping hole. During this sliding process, the fluid inside the hydraulic cylinder slowly flows through the damping hole, providing resistance and creating a cushioning effect, slowing the door's closing speed and ultimately ensuring a quiet and smooth closing.

[0043] To enhance stability and service life, guide grooves are provided on both sides of the damping sleeve. The drive plate passes through the guide grooves and connects to the connecting seat, ensuring precise guidance of the hydraulic cylinder during sliding, reducing friction and wear. Furthermore, the inclusion of baffles, positioning plates, and buckles further enhances the hinge's overall stability, ensuring long-term reliability.

[0044] Compared to conventional technologies, the diagonal arrangement of the hydraulic cylinder in this case effectively reduces the space it takes up inside the hinge arm, making the hinge more compact. This not only provides more space for other functional components but also meets the demand for miniaturized and compact designs in modern furniture.

[0045] Furthermore, because the hydraulic cylinder is positioned obliquely in the damping hole, the damping effect of the hydraulic cylinder during sliding is more stable. This tilt angle makes the buffering process smoother, effectively avoiding the stress concentration problem that may occur when the hydraulic cylinder and hinge arm are arranged parallel, and extending the service life of the hinge.

[0046] In summary, the compact hydraulic buffer hinge of the present invention overcomes many shortcomings in the existing technology through innovative design and sophisticated structural arrangement, and provides a hinge with compact structure, good buffering effect, easy installation and small size, so it can be widely used in various modern furniture.

[0047] 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 compact 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 an upper connecting rod (3) and a lower connecting rod (4); the hinge cup (1), the hinge arm (2), the upper connecting rod (3) and the lower connecting rod (4) form a four-link structure, wherein a torsion spring (5) is provided between the hinge arm (2) and the lower connecting rod (4), and the torsion spring (5) drives the lower connecting rod (4) to always swing in the closing direction, and is characterized in that: The hinge arm (2) is an open groove-shaped structure with an opening at the lower end. A receiving chamber (21) is formed in the hinge arm (2). A damping sleeve (6) is fixed in the receiving chamber (21). A damping hole (61) is obliquely opened in the damping sleeve (6). The cylinder body (71) of the hydraulic cylinder (7) is slidably installed in the damping hole (61). The tail of the lower connecting rod (4) is provided with a connecting seat (41), which is connected to the cylinder body (71) of the hydraulic cylinder (7), and the piston rod (72) of the hydraulic cylinder (7) is connected to the hinge arm (2). When the hinge is opened or closed, the connecting seat (41) drives the cylinder body (71) to slide in the accommodating chamber (21), thereby achieving a damping effect when the hinge is closed.

2. A compact hydraulic buffer hinge according to claim 1, characterized in that: The inclination angle between the damping hole (61) and the main body of the hinge arm (2) is set at 30° to 60°.

3. A compact hydraulic buffer hinge according to claim 1 or 2, characterized in that: The damping hole (61) is arranged in an inclined direction with one side facing the hinge cup (1) being higher and the other side being lower.

4. The compact hydraulic buffer hinge according to claim 1, characterized in that: The damping sleeve (6) is laterally provided with a first mounting hole (62) and a second mounting hole (63), and the first mounting hole (62) and the second mounting hole (63) are sleeved on a first pin shaft (64) and a second pin shaft (65) located on the hinge arm (2) and fixed.

5. The compact hydraulic buffer hinge according to claim 1, characterized in that: The lower connecting rod (4) is further provided with a third pin (66), and the torsion spring (5) is supported on the third pin (66).

6. The compact hydraulic buffer hinge according to claim 1, characterized in that: A buckle (42) is provided on the connecting seat (41), and correspondingly, a driving plate (73) is sleeved on the surface of the cylinder part (71), and the driving plate (73) extends into the buckle (42) and is connected thereto.

7. The compact hydraulic buffer hinge according to claim 6, characterized in that: Guide grooves (67) are provided on both sides of the damping sleeve (6), and the driving plate (73) passes through the guide grooves (67) and is connected to the connecting seat (41).

8. The compact hydraulic buffer hinge according to claim 1, characterized in that: A baffle (8) is also installed on the top of the damping sleeve (6), and a positioning plate (81) is provided at the front end of the baffle (8). The piston rod (72) of the damper is pressed against the positioning plate (81) and fixed.

9. The compact hydraulic buffer hinge according to claim 8, characterized in that: A clamping plate (82) is provided at the rear end of the baffle (8), and correspondingly, a positioning groove (68) is provided on the damping sleeve (6), and the clamping plate (82) is clamped and fixed in the positioning groove (68).

10. The compact hydraulic buffer hinge according to claim 8, characterized in that: The baffle (8) is further provided with a locking groove (83), and a positioning platform (69) extends upward from the top of the damping sleeve (6). The baffle (8) is mounted on the top of the damping sleeve (6), and the positioning platform (69) extends into the locking groove (83) and is fixed.

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