Door hinge and buffer device for door hinge

Abstract

The present application relates to a kind of door hinges, including hinge body and buffer unit, the hinge body includes hinge seat, U-shaped pivot, connecting piece, first pivot and shell;Wherein, the U-shaped pivot includes first connecting shaft and second connecting shaft, one end of the connecting piece is rotatably connected with the hinge seat by the first connecting shaft of U-shaped pivot, the other end of the connecting piece is rotatably arranged in shell by the first pivot;The buffer unit is connected by increasing a tab with connecting member and oil cylinder, so that the connecting member can drive the tab to move close to or away from the plane motion of the hinge seat by rotating, the plane motion of the tab will in turn drive the oil cylinder compression or reset, ingeniously use mechanical force in the process of door hinge opening and closing to help the oil cylinder reset, thereby reducing the loss of the oil cylinder.The present application has the advantages of reducing the loss of door hinge oil cylinder, prolonging the service life of oil cylinder.

Description

Technical Field

[0001] This invention relates to the field of home furnishings, and in particular to a door hinge and a buffer device for door hinges. Background Technology

[0002] A door hinge is a device that allows a door to rotate open and close. Existing door hinges incorporate a hydraulic cylinder with a cushioning effect. This cylinder reduces the impact force on the hinge during opening and closing, thus controlling the closing speed, reducing the risk of pinching and accidental injury, and preventing loud collisions and damage. However, the hydraulic cylinders in existing door hinges are prone to damage during use. When the cylinder fails, the hinge loses its cushioning effect, resulting in decreased safety performance. Therefore, a door hinge that can extend the lifespan of the hydraulic cylinder and ensure safety performance is needed. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide a door hinge that can reduce the wear and tear of the hydraulic cylinder in the door hinge and extend the service life of the hydraulic cylinder.

[0004] This invention is achieved through the following detailed technical solutions: A hinge includes a hinge body and a buffer unit. The hinge body includes a hinge base, a U-shaped pivot, a connector, a first pivot, and a housing. The U-shaped pivot includes a first connecting shaft and a second connecting shaft. One end of the connector is rotatably connected to the hinge base via the first connecting shaft of the U-shaped pivot, and the other end of the connector is rotatably disposed inside the housing via the first pivot. The buffer unit includes a linkage, a torsion spring, a cylinder sleeve, a second rotating shaft, a paddle, and a cylinder. One end of the linkage is rotatably connected to the hinge seat via a second connecting shaft of the U-shaped rotating shaft, and the other end of the linkage is rotatably disposed within the outer casing via the second rotating shaft. The torsion spring is sleeved on the first rotating shaft and abuts against the linkage. The cylinder sleeve is fixed within the outer casing, with one end of the torsion spring abutting against the cylinder sleeve and the other end abutting against the inner wall of the connecting member. The paddle is disposed on the cylinder sleeve and is driven by the linkage to perform planar movements towards or away from the hinge seat. The cylinder includes a cylinder body and a piston rod. The cylinder body is fixedly disposed within the cylinder sleeve, and the piston rod and the paddle remain in constant contact.

[0005] Compared to existing technologies, this invention connects the linkage to the hydraulic cylinder by adding a paddle, allowing the linkage to rotate clockwise or counterclockwise during the opening and closing of the door hinge. The rotation of the linkage drives the paddle to move back and forth, which in turn compresses or resets the piston rod of the hydraulic cylinder. This cleverly utilizes the mechanical force generated during the opening and closing of the door hinge to assist in the hydraulic cylinder's reset, eliminating the need for the internal spring to continue functioning during the reset process. Furthermore, a torsion spring is fixed to the linkage and the cylinder sleeve, preventing it from contacting the hydraulic cylinder and thus preventing the torsion spring's force from continuously affecting the internal spring. This reduces damage to the internal spring and extends the service life of the hydraulic cylinder from two perspectives.

[0006] Furthermore, the paddle includes a front end and a rear end. The front end has a groove, and the end of the linkage connected to the second rotating shaft has a protrusion that engages within the groove. The rear end has an end face that abuts against the piston rod of the hydraulic cylinder. The design of the protrusion and the groove not only ensures a tighter connection between the linkage and the paddle but also facilitates installation and disassembly. By abutting against the piston rod, the end face allows for both piston rod compression and resetting via its movement, eliminating the need for other components to act on the hydraulic cylinder. Moreover, the end face itself has a simple structure and is easy to manufacture.

[0007] Furthermore, the tail end of the paddle is also provided with a limiting structure that can fix the cylinder body. The limiting structure can prevent the cylinder from shaking and keep the cylinder fixed.

[0008] Furthermore, the cylinder sleeve is provided with a cylinder placement position and a paddle movement track. The cylinder is positioned in the cylinder placement position, and the paddle is installed within the paddle movement track. This design not only facilitates cylinder installation but also, in conjunction with the limiting structure on the paddle, ensures the cylinder remains fixed. The paddle movement track restricts the paddle's movement trajectory, thereby aligning the paddle's movement trajectory with the cylinder's compression and reset paths, thus rationally utilizing the mechanical force of the rotating component.

[0009] Furthermore, the cylinder liner is also provided with two spring clearance grooves and a linkage movable limiting part. The torsion spring includes a spring center and torsion arms disposed at both ends of the spring center. The spring center and one torsion arm are respectively disposed in the two spring clearance grooves, and the other torsion arm abuts against the inner wall of the connecting part. The spring clearance grooves can limit the torsion spring to always be fixed on the cylinder liner, so that the torsion spring never contacts the cylinder, and avoid the spring force always acting on the cylinder.

[0010] The present invention also provides a buffer device for a door hinge. The door hinge includes a hinge base, and the buffer device includes a linkage, a cylinder sleeve, a paddle, and a cylinder. One end of the linkage is rotatably disposed within the cylinder sleeve, and the other end is rotatably connected to the hinge base. The paddle is disposed on the cylinder sleeve and is driven by the linkage to perform planar movement towards or away from the hinge base. The cylinder includes a cylinder body and a piston rod. The cylinder body is fixedly disposed within the cylinder sleeve, and the piston rod and the paddle are always in contact.

[0011] Compared to existing technologies, the buffer device can be installed in existing door hinges. Specifically, by adjusting the structure of the torsion spring in the existing door hinge, it can be fixed to the linkage and cylinder sleeve of the buffer device. This cleverly utilizes the mechanical force during the opening and closing of the door hinge to help the cylinder reset, thereby reducing the wear of the cylinder and extending its service life.

[0012] Furthermore, the paddle includes a front end and a rear end. The front end has a groove, and the end of the connecting member that connects to the cylinder sleeve has a protrusion that is engaged within the groove. The rear end has an end face that abuts against the piston rod of the cylinder. The design of the protrusion and the groove not only allows for a tighter connection between the connecting member and the paddle but also facilitates installation and disassembly. By abutting against the piston rod, the end face enables both piston rod compression and resetting to be achieved through the movement of the end face, eliminating the need for other components to act on the cylinder. Moreover, the end face itself has a simple structure and is easy to manufacture.

[0013] Furthermore, the tail end of the paddle is also provided with a limiting surface that can fix the cylinder body. The limiting structure can prevent the cylinder from shaking and keep the cylinder fixed.

[0014] Furthermore, the cylinder sleeve is provided with a cylinder placement position and a paddle movement track. The cylinder is disposed in the cylinder placement position, and the paddle is installed in the paddle movement track. The cylinder placement position not only facilitates the installation of the cylinder but also, in conjunction with the limiting structure on the paddle, keeps the cylinder fixed. The paddle movement track restricts the movement trajectory of the paddle, thereby ensuring that the movement trajectory of the paddle is consistent with the compression and reset path of the cylinder, making rational use of the mechanical force during the rotation of the rotating component.

[0015] Furthermore, the cylinder liner is also provided with a linkage movement limiting part. The spring clearance part can limit the torsion spring to always be fixed on the cylinder liner, so that the torsion spring never contacts the cylinder, avoiding the spring force from always acting on the cylinder. The linkage movement limiting part restricts the linkage to only rotate and prevents it from shaking.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is an exploded view of the door hinge of the present invention; Figure 2 for Figure 1 3D diagram of a door hinge; Figure 3 for Figure 2 Sectional view AA of the door hinge; Figure 4 for Figure 1 A schematic diagram of the hydraulic cylinder liner of a door hinge; Figure 5 for Figure 1 A schematic diagram of the hydraulic cylinder of a door hinge; Figure 6 for Figure 1 A schematic diagram of the mechanism of a door hinge lever; Figure 7 for Figure 1 A schematic diagram of the linkage mechanism of a door hinge; Figure 8 for Figure 1 Another structural diagram of the hydraulic cylinder liner of the door hinge; Wherein: 11: Hinge seat, 12: U-shaped pivot, 13: Connector, 14: First pivot, 15: Outer shell, 2: Buffer unit, 21: Linkage, 211: Protrusion, 22: Torsion spring, 23: Cylinder sleeve, 231: Cylinder placement position, 232: Paddle movement track, 233: Spring clearance groove, 234: Linkage movement limit part, 24: Second pivot, 25: Third pivot, 26: Paddle, 261: Paddle front end, 2611: Groove, 262: Paddle rear end, 2621: End face, 2622: Limiting structure, 27: Cylinder, 271: Cylinder body, 272: Piston rod. Detailed Implementation

[0018] The applicant's research on existing door hinge buffer devices revealed that the buffering effect of the hydraulic cylinder in these devices relies on the compression and reset of the cylinder. This compression and reset depend on an internal spring, which, in turn, must continuously compress and reset to achieve the buffering effect. This results in the spring being in a working state for extended periods, shortening its lifespan and consequently affecting the lifespan of the hydraulic cylinder. Therefore, this invention provides a door hinge that uses mechanical action to assist in the hydraulic cylinder's reset, reducing the pressure on the internal spring and thus extending the cylinder's lifespan.

[0019] Please see Figure 1-3The door hinge of the present invention includes a hinge body and a buffer unit 2. The hinge body includes a hinge base 11, a U-shaped pivot 12, a connector 13, a first pivot 14, and a housing 15. The U-shaped pivot includes a first connecting shaft and a second connecting shaft. One end of the connector 13 is rotatably connected to the hinge base 11 through the first connecting shaft of the U-shaped pivot 12, and the other end of the connector 13 is rotatably disposed in the housing 15 through the first pivot 14. The buffer unit 2 includes a linkage 21, a torsion spring 22, a cylinder sleeve 23, a second rotating shaft 24, a third rotating shaft 25, a paddle 26, and a cylinder 27. One end of the linkage 21 is rotatably connected to the hinge seat 11 via the second connecting shaft of the U-shaped rotating shaft 12, and the other end of the linkage 21 is rotatably disposed within the cylinder sleeve 23 via the second rotating shaft 24. The torsion spring 22 is sleeved on the first rotating shaft 14 and abuts against the linkage 21, with one end abutting against the cylinder sleeve 23 and the other end abutting against the inner wall of the connecting member 13. The cylinder sleeve 23 is fixed within the outer casing 15 via the second rotating shaft 24 and the third rotating shaft 25. (See also...) Figure 4 The cylinder sleeve 23 is provided with a cylinder placement position 231 and a paddle movement track 232. The paddle 26 is installed in the paddle movement track 232 for limiting its position. The paddle 26 is driven by the linkage 21 to move in a planar motion within the paddle movement track 232 towards or away from the hinge seat 11. Please refer to [link / reference]. Figure 5 The hydraulic cylinder 27 includes a cylinder body 271 and a piston rod 272. The cylinder body 271 is fixedly installed in the hydraulic cylinder placement position 231 of the hydraulic cylinder sleeve 23, and the piston rod 272 is always in contact with the paddle 26.

[0020] Please see Figure 6 In one embodiment, the paddle 26 includes a paddle front end 261 and a paddle rear end 262, and the paddle front end is provided with a groove 2611. (See also...) Figure 7 The connecting member 21 has a protrusion 211 at one end connected to the second rotating shaft 24, and the protrusion 211 is engaged in the groove 2611. The rear end 262 of the paddle has an end face 2621, and the end face 2621 is always in contact with the piston rod 272 of the oil cylinder 27.

[0021] In one embodiment, the tail end 262 of the paddle is further provided with a limiting structure 2622 to restrict the movement of the hydraulic cylinder 27. The limiting structure 2622 can ensure that the hydraulic cylinder 27 is fixed in the tail end 262 of the paddle and prevent the hydraulic cylinder 27 from shaking on the paddle 26.

[0022] Please refer to 8. In one embodiment, the torsion spring 22 includes a spring center and torsion arms disposed at both ends of the spring center. The cylinder sleeve 23 is also provided with two spring relief grooves 233 and a linkage movable limiting part 234. The spring center and one of the torsion arms are respectively disposed in the two spring relief grooves 233, and the other torsion arm abuts against the inner wall of the connector 13. During the opening and closing of the door hinge, the torsion spring 22 does not contact the cylinder 27. The linkage movable limiting part 234 restricts the linkage 21 to rotate only around the pivot and prevents it from swaying left and right, thereby preventing the door panel from sagging. Even when opening and closing under load, it will not affect the rotation of the door hinge, making the product quieter and more durable.

[0023] The working principle of the door hinge is as follows: When the door hinge needs to be opened, the linkage 21 rotates clockwise around the second pivot 24. The protrusion 211 of the linkage 21 drives the paddle 26 to move along the paddle movement track toward the hinge seat 11 through the groove 2611. The end face 2621 of the paddle tail end 262 abuts against the piston rod 272 of the oil cylinder 27 and moves to compress the piston rod 272, and the door hinge gradually opens. This process is quiet, stable and smooth.

[0024] When the door hinge needs to be closed, the linkage 21 rotates counterclockwise around the second pivot 24. The protrusion 211 of the linkage 21 drives the paddle 26 away from the hinge seat 11 along the paddle movement track through the groove 2611. The paddle 26 returns to its original position under the action of the linkage 21, without relying on the rebound force of the spring inside the cylinder 27, thereby reducing the wear of the spring inside the cylinder and increasing the service life of the cylinder.

[0025] The present invention also provides a buffer device for a door hinge, the buffer device including the linkage 21, cylinder sleeve 23, paddle 26 and cylinder 27 in the above embodiments; the buffer device can be installed in an existing door hinge, specifically by adjusting the structure of the torsion spring in the existing door hinge, fixing the torsion spring on the linkage 21 and cylinder sleeve 23 of the buffer device, the torsion spring and the buffer device forming a buffer unit of the existing door hinge, the buffer unit enabling the existing door hinge to achieve the function of extending the service life of the cylinder in the door hinge in the above embodiments.

[0026] Compared to existing technologies, this invention connects the linkage 21 and the hydraulic cylinder 27 by adding a paddle. The linkage 21 can rotate clockwise or counterclockwise during the opening and closing of the door hinge. When the linkage 21 rotates, it drives the paddle 26 to move closer to or away from the hinge seat 11 in a planar motion. The planar motion of the paddle 26 will then drive the piston rod 272 of the hydraulic cylinder 27 to compress or reset. This cleverly utilizes the mechanical force during the opening and closing of the door hinge to help the hydraulic cylinder 27 reset, eliminating the need for the internal spring of the hydraulic cylinder 27 to continue to function during the reset. In addition, the torsion spring 22 is fixed to the linkage 21 and the hydraulic cylinder sleeve 23 to prevent the torsion spring 22 from contacting the hydraulic cylinder 27 and to prevent the elasticity of the torsion spring 22 from affecting the hydraulic cylinder 27. This reduces the wear of the internal spring of the hydraulic cylinder 27 from two aspects and extends the service life of the hydraulic cylinder 27.

[0027] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A door hinge, characterized in that: The device includes a hinge body and a buffer unit. The hinge body includes a hinge base, a U-shaped pivot, a connector, a first pivot, and a housing. The U-shaped pivot includes a first connecting shaft and a second connecting shaft. One end of the connector is rotatably connected to the hinge base via the first connecting shaft of the U-shaped pivot, and the other end of the connector is rotatably disposed inside the housing via the first pivot. The buffer unit includes a linkage, a torsion spring, a cylinder sleeve, a second rotating shaft, a paddle, and a cylinder; wherein, one end of the linkage is rotatably connected to the hinge seat via the second connecting shaft of the U-shaped rotating shaft, and the other end of the linkage is rotatably disposed within the outer casing via the second rotating shaft; the torsion spring is sleeved on the first rotating shaft and fits against the linkage, and the cylinder sleeve is fixed within the outer casing; the cylinder sleeve has a cylinder placement position and a paddle movement track, the cylinder is disposed in the cylinder placement position, and the paddle is installed within the paddle movement track; The cylinder liner is also provided with two spring relief grooves and a linkage movable limiting part. The torsion spring includes a spring center and torsion arms disposed at both ends of the spring center. The spring center and one torsion arm are respectively disposed in the two spring relief grooves, and the other torsion arm abuts against the inner wall of the connector. The paddle is disposed on the cylinder liner. The paddle is driven by the linkage to move closer to or away from the hinge seat in a planar motion. The cylinder includes a cylinder body and a piston rod. The cylinder body is fixedly disposed in the cylinder liner, and the piston rod and the paddle are always in contact.

2. The door hinge according to claim 1, characterized in that: The paddle includes a front end and a rear end. The front end of the paddle has a groove, and the end of the linkage that is connected to the second rotating shaft has a protrusion. The protrusion is engaged in the groove. The rear end of the paddle has an end face that abuts against the piston rod of the oil cylinder.

3. The door hinge according to claim 2, characterized in that: The tail end of the paddle is also provided with a limiting structure that can fix the cylinder body.

4. A buffer device for a door hinge, the door hinge comprising a hinge base, a connector, a housing, and a torsion spring, one end of the connector being rotatably connected to the hinge base, and the other end of the connector being rotatably disposed within the housing; the torsion spring comprising a spring center and torsion arms disposed at both ends of the spring center, characterized in that: The buffer device includes a linkage, a cylinder sleeve, a paddle, and a cylinder; wherein, one end of the linkage is rotatably disposed within the cylinder sleeve, and the other end is rotatably connected to the hinge seat; the cylinder sleeve is provided with two spring relief grooves and a linkage movable limiting part; the spring center of the torsion spring and one torsion arm are respectively disposed in the two spring relief grooves, and the other torsion arm abuts against the inner wall of the connector; one end of the torsion spring abuts against the cylinder sleeve, and the other end abuts against the inner wall of the connector; the paddle is disposed on the cylinder sleeve and is driven by the linkage to perform planar movement toward or away from the hinge seat; the cylinder includes a cylinder body and a piston rod, the cylinder body is fixedly disposed within the cylinder sleeve, and the piston rod and the paddle are always in contact.

5. The buffer device according to claim 4, characterized in that: The paddle includes a front end and a rear end. The front end of the paddle has a groove, and the end of the linkage that is connected to the cylinder sleeve has a protrusion that is engaged in the groove. The rear end of the paddle has an end face that abuts against the piston rod of the cylinder.

6. The buffer device according to claim 5, characterized in that: The tail end of the paddle is also provided with a limiting structure that can fix the cylinder body.

7. The buffer device according to claim 6, characterized in that: The cylinder sleeve is provided with a cylinder placement position and a paddle movement track. The cylinder is located in the cylinder placement position, and the paddle is installed in the paddle movement track.

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