Damper and damper hinge

Abstract

The utility model relates to a kind of damper and damping hinge.Damper includes cylinder, piston, first sealing element, piston rod, elastic element and air hole;Cylinder is equipped with inner chamber inside;Piston and first sealing element are all located in inner chamber, and piston is located before first sealing element, and piston and first sealing element will be inner chamber by front to rear sequentially separated into first chamber, second chamber and third chamber;Piston rod rear end is located in inner chamber and is connected with piston, and the front end of piston rod is located in the outside of cylinder;Elastic element is located in third chamber, and elastic element connects first sealing element and cylinder;Air hole is opened on cylinder to be connected with third chamber and outside.The damping hinge includes the above damper.The utility model solves the problem that the existing damper will affect the internal pressure of inner chamber due to the process that piston rod enters or moves out of inner chamber, causes the inactivity of piston, and affects the damping buffering effect of hinge.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, and in particular to a damper and a damping hinge including the damper. Background Technology

[0002] A hinge, also known as a door hinge, is a mechanical device used to connect two parts and allow them to rotate relative to each other. It is widely used in connecting cabinet doors and cabinet bodies. Hinges are mainly installed on doors and windows, especially cabinet and furniture doors. Classified by material, they are mainly divided into stainless steel hinges and iron hinges. To provide a better user experience, damping hinges (also known as buffer hinges) have been developed. Damping hinges have internal or external damping devices, which provide a buffering function when the cabinet door closes, minimizing the noise generated by the door colliding with the cabinet body.

[0003] For example, Chinese Patent Publication No. CN111852232A discloses a damper and a damping hinge, which includes a cylinder, a piston, and a piston rod. The front end of the cylinder forms a sealed space within its inner chamber through a seal. The piston is located within the inner chamber of the cylinder and divides the inner chamber into a first chamber and a second chamber. When the piston moves from front to back, the medium in the second chamber can flow smoothly into the first chamber. When the piston moves from back to front, it can limit the speed at which the medium in the first chamber flows into the second chamber, thereby generating a damping force and achieving the function of the hinge's buffering closure. However, during the piston's movement, the piston rod may enter or exit the inner chamber, causing the internal pressure of the inner chamber to increase or decrease, which in turn hinders the piston's movement and affects the damping effect ultimately produced by the damper. Utility Model Content

[0004] To address the problem that existing dampers cause the piston's movement to be obstructed and thus affect the damping and buffering effect of the hinge due to the piston rod entering or leaving the inner chamber affecting the internal pressure, this utility model provides a damper.

[0005] The objective of this application is achieved through the following technical solution:

[0006] A damper, comprising:

[0007] The cylinder block has an internal chamber.

[0008] A piston and a first seal are both disposed in the inner cavity, with the piston positioned in front of the first seal. The piston and the first seal divide the inner cavity into a first chamber, a second chamber, and a third chamber from front to back.

[0009] The piston rod has its rear end located in the inner chamber and connected to the piston, and its front end located outside the cylinder body;

[0010] An elastic element is disposed in the third chamber, and the elastic element connects the first seal and the cylinder body;

[0011] A vent is provided on the cylinder body to connect the third chamber to the outside.

[0012] Compared with the prior art, the advantages of this damper are as follows:

[0013] A first seal and an elastic element are added inside the cylinder, along with a matching vent hole. When the piston rod moves backward, causing the middle part of the piston rod to enter the inner cavity and increasing the pressure in the inner cavity, the first seal can move backward under the pressure. Alternatively, when the piston rod moves forward, causing the middle part of the piston rod to move out of the inner cavity and decreasing the pressure in the inner cavity, the first seal can move forward under the pressure and the elastic element. This maintains the pressure balance inside the cylinder, making the piston move more smoothly inside the cylinder without being affected by additional pressure, thus improving the damping effect of the damper.

[0014] In some embodiments, a sealing portion is formed on the outer periphery of the first seal, and the sealing portion is in close contact with the inner wall surface of the inner cavity. The sealing portion allows for a higher degree of contact between the first seal and the inner wall surface of the cylinder, resulting in a better sealing effect. The front end of the sealing portion has a clearance portion formed at a position corresponding to the sealing portion. Since the diameter of the sealing portion is slightly larger than the diameter of the inner cavity, the addition of the clearance portion allows for inward retraction of the sealing portion when it is installed inside the cylinder, thus making the sealing portion more compatible with the inner wall surface of the inner cavity.

[0015] In some embodiments, the front and rear walls of the sealing portion are both inclined to make the first sealing member move more smoothly in the front-rear direction.

[0016] In some embodiments, a first mounting portion is formed on the cylinder body, through which the cylinder body is mounted to the hinge arm of a hinge or other application body.

[0017] In some embodiments, the first mounting portion is a hole that extends laterally through the cylinder body. The first mounting portion is located behind the third chamber. The vent hole connects the third chamber and the first mounting portion. When the piston moves back and forth, air can enter or exit the third chamber along the vent hole and the first mounting portion.

[0018] In some embodiments, the first mounting portion is a hole that extends laterally through the cylinder body, and at least a portion of the first mounting portion communicates with the third chamber to form the vent hole, so that air can enter or exit the third chamber along the first mounting portion when the piston moves back and forth.

[0019] In some embodiments, an annular groove is formed at the rear end of the first seal, and one end of the elastic member is disposed in the annular groove, thereby improving the connection stability between the elastic member and the first seal.

[0020] In some embodiments, a second seal is provided at the front end of the cylinder body, the second seal being used to seal the gap between the piston rod and the cylinder body.

[0021] In some embodiments, the rear end of the second seal has a deformable portion formed on its outer periphery, the outer peripheral wall of which contacts the side wall of the inner chamber. When the piston moves from rear to front, the piston applies pressure to the second seal through the medium, thereby causing the deformable portion to tend to expand outward, further improving the sealing performance of the second seal and preventing the medium in the inner chamber from leaking out.

[0022] Another aspect of this utility model provides a damping hinge, comprising:

[0023] A hinge arm for mounting on a first member, wherein a first pivot is mounted on the hinge arm;

[0024] Hinge cup, used for mounting on the second component;

[0025] The first linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm.

[0026] The second linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm.

[0027] A torsion spring, sleeved around the outside of the first rotating shaft, wherein the two ends of the torsion spring are respectively connected to the hinge arm and the first linkage, or respectively connected to the hinge arm and the second linkage; and

[0028] The damper has a cylinder body that is rotatably connected to the hinge arm, and a piston rod that is rotatably connected to the second linkage. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a damping hinge involved in this utility model;

[0030] Figure 2 This is a cross-sectional schematic diagram of a damping hinge involved in this utility model;

[0031] Figure 3 This is a cross-sectional schematic diagram of a damper according to this utility model;

[0032] Figure 4This is a schematic diagram of the piston structure in a damper according to this utility model;

[0033] Figure 5 This is a first-view structural schematic diagram of the main body of a damper according to this utility model;

[0034] Figure 6 This is a second-view structural schematic diagram of the main body of a damper according to this utility model;

[0035] Figure 7 This is a cross-sectional schematic diagram of the first sealing element in a damper according to the present invention.

[0036] Figure label:

[0037] 1. Hinge arm; 2. Hinge cup; 3. First linkage; 4. Second linkage; 5. Torsion spring; 6. Damper; 7. Base;

[0038] 61. Cylinder block; 611. First chamber; 612. Second chamber; 613. Third chamber; 614. Vent hole; 615. First mounting part; 62. Piston; 621. Main body; 622. Third seal; 623. Oil return passage; 6231. First hole; 6232. Second hole; 6233. Third hole; 624. Receiving part; 63. First seal; 631. Sealing part; 632. Clearance part; 633. Annular groove; 64. Piston rod; 65. Elastic element; 66. Second seal; 661. Deformation part. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component at the same time; when a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intervening component at the same time.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In the description of the embodiments of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0043] To address the problem that existing dampers suffer from impeded piston movement and reduced damping effect of the hinge due to the piston rod's movement affecting the internal pressure of the chamber during entry or exit, this invention provides a damper.

[0044] Taking the application of this damper in a hinge as an example, the objective of this application is achieved through the following technical solution. (Reference) Figures 1-7 A damping hinge includes a hinge arm 1, a hinge cup 2, a first linkage 3, a second linkage 4, a torsion spring 5, and a damper 6.

[0045] The hinge arm 1 is used to be mounted on the first component, and the first rotating shaft is mounted on the hinge arm 1;

[0046] Hinge cup 2 is used for mounting on the second component;

[0047] One end of the first linkage 3 is rotatably connected to the hinge cup 2, and the other end of the first linkage 3 is rotatably connected to the hinge arm 1.

[0048] One end of the second linkage 4 is rotatably connected to the hinge cup 2, and the other end of the second linkage 4 is rotatably connected to the hinge arm 1.

[0049] The torsion spring 5 is sleeved on the outside of the first rotating shaft. The two ends of the torsion spring 5 are respectively connected to the hinge arm 1 and the first linkage 3, or respectively connected to the hinge arm 1 and the second linkage 4; and

[0050] The damper 6 includes a cylinder 61, a piston 62, a first seal 63, a piston rod 64, and an elastic element 65. The cylinder 61 has an inner chamber, in which the piston 62 and the first seal 63 are located, with the piston 62 positioned in front of the first seal 63. The piston 62 and the first seal 63 divide the inner chamber into a first chamber 611, a second chamber 612, and a third chamber 613 from front to back. The rear end of the piston rod 64 is located in the inner chamber and connected to the piston 62, while the front end of the piston rod 64 is located outside the cylinder 61. The elastic element 65 is located inside the third chamber 613 and connects the first seal 63 and the cylinder 61. The cylinder 61 forms a vent 614 for connecting the third chamber 613 to the outside. The cylinder 61 of the damper 6 is rotatably connected to the hinge arm, and the piston rod 64 of the damper 6 is rotatably connected to the second linkage 4.

[0051] The damping hinge of this invention achieves a buffered closing effect through the damper 6. When the hinge cup 2 unfolds relative to the hinge arm 1, the piston rod 64 drives the piston 62 to move from front to back. At this time, the pressure in the inner chamber gradually increases due to the middle part of the piston rod 64 entering the inner chamber, while the first seal 63 moves backward under the action of the above pressure, thereby balancing the pressure inside the cylinder 61 and making the unfolding of the hinge cup 2 smoother. Similarly, when the hinge cup 2 closes relative to the hinge arm 1, the piston rod 64 drives the piston 62 to move from back to front. At this time, the pressure in the inner chamber gradually decreases due to the middle part of the piston rod 64 moving out of the inner chamber, while the first seal 63 moves forward under the action of the above pressure and the elastic member 65, thereby balancing the pressure inside the cylinder 61, so that the damping movement of the damper 6 is not affected by the additional pressure, making the buffered closing effect of the hinge cup 2 better. Compared with the prior art, this application adds a first seal 63 and an elastic element 65 inside the cylinder 61 of the damper 6, and adds a matching vent hole 614 so that when the piston rod 64 moves, the first seal 63 can move back and forth adaptively to maintain the internal pressure balance of the cylinder 61 of the damper 6, thereby making the movement of the piston 62 smoother and improving the smoothness of the opening and closing of the hinge cup 2.

[0052] In some embodiments, the piston 62 includes a main body 621 and a third seal 622. The main body 621 is provided with an oil return channel 623. When the main body 621 moves from back to front, the third seal 622 can limit the speed at which the medium in the first chamber 611 flows along the oil return channel 623 into the second chamber 612, thereby reducing the movement speed of the piston 62 and realizing the rotation speed when the hinge cup 2 switches to the closed state.

[0053] Furthermore, a recessed receiving portion 624 is provided on the outer side of the main body 621. The oil return channel 623 includes a first hole 6231, a second hole 6232, and a third hole 6233 that axially penetrate the piston 62. The first hole 6231 and the second hole 6232 are distributed on both sides of the receiving portion 624. The first hole 6231 communicates with the first chamber 611, the second hole 6232 communicates with the second chamber 612, and the third hole 6233 is formed on the side wall of the receiving portion 624. The first hole 6231 and the third hole 6233 are directly connected, and the second hole 6232 and the third hole 6233 are connected through the receiving portion 624. The third seal 622 is a rubber ring and is movably disposed in the receiving portion 624. When the hinge cup 2 switches from the closed state to the unfolded state, the hinge cup 2 is activated by the linkage (first linkage). The piston rod 64 is driven to move from front to back by the second linkage. At this time, the rubber ring abuts against the front wall of the accommodating part 624, and the medium (liquid or gas) in the second chamber 612 can flow rapidly into the first chamber 611 through the second hole 6232, the accommodating part 624, the third hole 6233 and the first hole 6231 in sequence, so that the piston 62 can move smoothly and the hinge cup 2 can be opened easily. When the hinge cup 2 switches from the unfolded state to the closed state, the hinge cup 2 drives the piston rod 64 to move from back to front through the linkage. At this time, the rubber ring abuts against the rear wall of the accommodating part 624, thereby forming a barrier between the second hole 6232 and the third hole 6233. In this way, the speed at which the medium in the third hole 6233 flows into the second hole 6232 is slowed down, and the movement speed of the piston 62 is relatively slow, thereby realizing the buffered closing of the hinge cup 2.

[0054] In some embodiments, a sealing portion 631 is formed on the outer periphery of the first sealing member 63, and the sealing portion 631 is in close contact with the inner wall surface of the inner cavity. The provision of the sealing portion 631 can improve the fit between the first sealing member 63 and the inner wall surface of the cylinder 61, resulting in a better sealing effect. Specifically, a clearance portion 632 is formed at the front end of the sealing portion 631 at the corresponding position. Since the diameter of the sealing portion 631 is slightly larger than the diameter of the inner cavity, the addition of the clearance portion 632 allows for inward retraction of the sealing portion 631 when it is installed inside the cylinder 61, thus making the sealing portion 631 more compatible with the inner wall surface of the inner cavity.

[0055] In some embodiments, the front and rear walls of the sealing part 631 are both inclined to make the first sealing member 63 move more smoothly in the front-rear direction.

[0056] In some embodiments, a first mounting portion 615 is formed on the cylinder body 61, through which the cylinder body 61 is mounted to the hinge arm 1 of the hinge, the slide rail, or other components.

[0057] As a preferred embodiment, the first mounting part 615 is a hole that extends laterally through the cylinder 61. The first mounting part 615 is located behind the third chamber 613. The vent hole 614 connects the third chamber 613 and the first mounting part 615. When the piston 62 moves back and forth, air can enter or exit the third chamber 613 along the vent hole 614 and the first mounting part 615.

[0058] As another preferred embodiment, the first mounting portion 615 is a hole that extends laterally through the cylinder 61, and at least a portion of the first mounting portion 615 is connected to the third chamber 613 to form a vent 614. When the piston 62 moves back and forth, air can enter or exit the third chamber 613 along the first mounting portion 615.

[0059] In some embodiments, an annular groove 633 is formed at the rear end of the first seal 63, and one end of the elastic member 65 is disposed in the annular groove 633, thereby improving the connection stability between the elastic member 65 and the first seal 63.

[0060] In some embodiments, a second seal 66 is provided at the front end of the cylinder 61. The second seal 66 is used to seal the gap between the piston rod 64 and the cylinder 61 to prevent the medium in the inner chamber from leaking out.

[0061] Furthermore, a deformable portion 661 is formed on the outer periphery of the rear end of the second seal 66, and the outer peripheral wall of the deformable portion 661 is in contact with the side wall of the inner cavity. When the piston 62 moves from rear to front, the piston 62 applies pressure to the second seal 66 through the medium, thereby causing the deformable portion 661 to tend to expand outward, further improving the sealing performance of the second seal 66 and preventing the medium in the inner cavity from leaking out.

[0062] In some embodiments, a base 7 is detachably mounted on the bottom of the hinge arm 1, and the bottom of the base 7 has a protrusion. The protrusion can insert into the cabinet body, cabinet door, or other mounting components to achieve the pre-positioning of the hinge arm 1, thereby reducing the installation difficulty of the hinge arm 1.

[0063] The above description is only a preferred embodiment of the present utility model, and its structure is not limited to the shapes listed above. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A damper, characterized in that, include: The cylinder block has an internal chamber. A piston and a first seal are both disposed in the inner cavity, with the piston positioned in front of the first seal. The piston and the first seal divide the inner cavity into a first chamber, a second chamber, and a third chamber from front to back. A piston rod, the rear end of which is located in the inner chamber and connected to the piston, and the front end of which is located outside the cylinder body; An elastic element is disposed in the third chamber, and the elastic element connects the first seal and the cylinder body; A vent is provided on the cylinder body to connect the third chamber to the outside.

2. The damper as described in claim 1, characterized in that, The outer periphery of the first seal has a sealing portion, which is in close contact with the inner wall surface of the inner cavity.

3. The damper as described in claim 2, characterized in that, The front and rear walls of the sealing part are both inclined.

4. The damper as described in claim 1, characterized in that, A first mounting portion is formed on the cylinder block.

5. A damper as described in claim 4, characterized in that, The first mounting portion is a hole that extends laterally through the cylinder body. The first mounting portion is located behind the third chamber, and the vent hole connects the third chamber and the first mounting portion.

6. A damper as described in claim 4, characterized in that, The first mounting portion is a hole that extends laterally through the cylinder body, and at least a portion of the first mounting portion is connected to the third chamber to form the vent hole.

7. A damper as described in claim 1, characterized in that, The rear end of the first seal has an annular groove, and one end of the elastic element is disposed in the annular groove.

8. A damper as described in claim 1, characterized in that, The front end of the cylinder is provided with a second seal, which is used to seal the gap between the piston rod and the cylinder.

9. A damper as described in claim 8, characterized in that, The rear end of the second seal has a deformable portion formed on its outer periphery, and the outer peripheral wall of the deformable portion is in contact with the side wall of the inner cavity.

10. A damping hinge, characterized in that, include: A hinge arm for mounting on a first component, wherein a first pivot is mounted on the hinge arm; Hinge cup, used for mounting on the second component; The first linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm. The second linkage has one end rotatably connected to the hinge cup, and the other end rotatably connected to the hinge arm. A torsion spring is sleeved on the outside of the first rotating shaft, and the two ends of the torsion spring are respectively connected to the hinge arm and the first linkage, or respectively connected to the hinge arm and the second linkage; and The damper according to any one of claims 1-9, wherein the cylinder of the damper is rotatably connected to the hinge arm, and the piston rod of the damper is rotatably connected to the second linkage.

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